Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Digital Audio (PCM) abstract layer |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Abramo Bagnara <abramo@alsa-project.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | */ |
| 7 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | #include <linux/slab.h> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame] | 9 | #include <linux/sched/signal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/time.h> |
Takashi Iwai | 3f7440a | 2009-06-05 17:40:04 +0200 | [diff] [blame] | 11 | #include <linux/math64.h> |
Paul Gortmaker | d81a6d7 | 2011-09-22 09:34:58 -0400 | [diff] [blame] | 12 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <sound/core.h> |
| 14 | #include <sound/control.h> |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 15 | #include <sound/tlv.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <sound/info.h> |
| 17 | #include <sound/pcm.h> |
| 18 | #include <sound/pcm_params.h> |
| 19 | #include <sound/timer.h> |
| 20 | |
Takashi Sakamoto | 2c4842d | 2017-05-26 09:30:46 +0900 | [diff] [blame] | 21 | #include "pcm_local.h" |
| 22 | |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 23 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 24 | #define CREATE_TRACE_POINTS |
| 25 | #include "pcm_trace.h" |
| 26 | #else |
| 27 | #define trace_hwptr(substream, pos, in_interrupt) |
| 28 | #define trace_xrun(substream) |
| 29 | #define trace_hw_ptr_error(substream, reason) |
Takashi Sakamoto | fccf538 | 2017-06-12 09:41:45 +0900 | [diff] [blame] | 30 | #define trace_applptr(substream, prev, curr) |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 31 | #endif |
| 32 | |
Takashi Iwai | a9cd29e | 2017-05-24 18:18:15 +0200 | [diff] [blame] | 33 | static int fill_silence_frames(struct snd_pcm_substream *substream, |
| 34 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames); |
| 35 | |
Jaroslav Kysela | 6d8d56d | 2023-05-05 17:52:42 +0200 | [diff] [blame] | 36 | |
| 37 | static inline void update_silence_vars(struct snd_pcm_runtime *runtime, |
| 38 | snd_pcm_uframes_t ptr, |
| 39 | snd_pcm_uframes_t new_ptr) |
| 40 | { |
| 41 | snd_pcm_sframes_t delta; |
| 42 | |
| 43 | delta = new_ptr - ptr; |
| 44 | if (delta == 0) |
| 45 | return; |
| 46 | if (delta < 0) |
| 47 | delta += runtime->boundary; |
| 48 | if ((snd_pcm_uframes_t)delta < runtime->silence_filled) |
| 49 | runtime->silence_filled -= delta; |
| 50 | else |
| 51 | runtime->silence_filled = 0; |
| 52 | runtime->silence_start = new_ptr; |
| 53 | } |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* |
| 56 | * fill ring buffer with silence |
| 57 | * runtime->silence_start: starting pointer to silence area |
| 58 | * runtime->silence_filled: size filled with silence |
| 59 | * runtime->silence_threshold: threshold from application |
| 60 | * runtime->silence_size: maximal size from application |
| 61 | * |
| 62 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately |
| 63 | */ |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 64 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 66 | struct snd_pcm_runtime *runtime = substream->runtime; |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 67 | snd_pcm_uframes_t frames, ofs, transfer; |
Takashi Iwai | 29d1a87 | 2017-05-10 20:02:35 +0200 | [diff] [blame] | 68 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | if (runtime->silence_size < runtime->boundary) { |
Jaroslav Kysela | 6d8d56d | 2023-05-05 17:52:42 +0200 | [diff] [blame] | 71 | snd_pcm_sframes_t noise_dist; |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 72 | snd_pcm_uframes_t appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
Jaroslav Kysela | 6d8d56d | 2023-05-05 17:52:42 +0200 | [diff] [blame] | 73 | update_silence_vars(runtime, runtime->silence_start, appl_ptr); |
Jaroslav Kysela | 2fbaa44 | 2023-05-05 17:52:39 +0200 | [diff] [blame] | 74 | /* initialization outside pointer updates */ |
| 75 | if (new_hw_ptr == ULONG_MAX) |
| 76 | new_hw_ptr = runtime->status->hw_ptr; |
| 77 | /* get hw_avail with the boundary crossing */ |
| 78 | noise_dist = appl_ptr - new_hw_ptr; |
| 79 | if (noise_dist < 0) |
| 80 | noise_dist += runtime->boundary; |
| 81 | /* total noise distance */ |
| 82 | noise_dist += runtime->silence_filled; |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 83 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) |
| 84 | return; |
| 85 | frames = runtime->silence_threshold - noise_dist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | if (frames > runtime->silence_size) |
| 87 | frames = runtime->silence_size; |
| 88 | } else { |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 89 | /* |
| 90 | * This filling mode aims at free-running mode (used for example by dmix), |
| 91 | * which doesn't update the application pointer. |
| 92 | */ |
Oswald Buddenhagen | 6ffa6f3 | 2023-05-05 17:52:43 +0200 | [diff] [blame] | 93 | snd_pcm_uframes_t hw_ptr = runtime->status->hw_ptr; |
| 94 | if (new_hw_ptr == ULONG_MAX) { |
| 95 | /* |
| 96 | * Initialization, fill the whole unused buffer with silence. |
| 97 | * |
| 98 | * Usually, this is entered while stopped, before data is queued, |
| 99 | * so both pointers are expected to be zero. |
| 100 | */ |
| 101 | snd_pcm_sframes_t avail = runtime->control->appl_ptr - hw_ptr; |
| 102 | if (avail < 0) |
| 103 | avail += runtime->boundary; |
| 104 | /* |
| 105 | * In free-running mode, appl_ptr will be zero even while running, |
| 106 | * so we end up with a huge number. There is no useful way to |
| 107 | * handle this, so we just clear the whole buffer. |
| 108 | */ |
| 109 | runtime->silence_filled = avail > runtime->buffer_size ? 0 : avail; |
| 110 | runtime->silence_start = hw_ptr; |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 111 | } else { |
Oswald Buddenhagen | 6ffa6f3 | 2023-05-05 17:52:43 +0200 | [diff] [blame] | 112 | /* Silence the just played area immediately */ |
| 113 | update_silence_vars(runtime, hw_ptr, new_hw_ptr); |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 114 | } |
Oswald Buddenhagen | 6ffa6f3 | 2023-05-05 17:52:43 +0200 | [diff] [blame] | 115 | /* |
| 116 | * In this mode, silence_filled actually includes the valid |
| 117 | * sample data from the user. |
| 118 | */ |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 119 | frames = runtime->buffer_size - runtime->silence_filled; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 121 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
| 122 | return; |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 123 | if (frames == 0) |
| 124 | return; |
Jaroslav Kysela | 781b4da | 2023-05-05 17:52:40 +0200 | [diff] [blame] | 125 | ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size; |
Oswald Buddenhagen | ee2dd70 | 2023-05-05 17:52:44 +0200 | [diff] [blame] | 126 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; |
Takashi Iwai | a9cd29e | 2017-05-24 18:18:15 +0200 | [diff] [blame] | 128 | err = fill_silence_frames(substream, ofs, transfer); |
| 129 | snd_BUG_ON(err < 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | runtime->silence_filled += transfer; |
| 131 | frames -= transfer; |
| 132 | ofs = 0; |
Oswald Buddenhagen | ee2dd70 | 2023-05-05 17:52:44 +0200 | [diff] [blame] | 133 | } while (frames > 0); |
Takashi Iwai | a25684a | 2021-10-17 09:48:57 +0200 | [diff] [blame] | 134 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 137 | #ifdef CONFIG_SND_DEBUG |
| 138 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, |
Takashi Iwai | c0070110 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 139 | char *name, size_t len) |
| 140 | { |
| 141 | snprintf(name, len, "pcmC%dD%d%c:%d", |
| 142 | substream->pcm->card->number, |
| 143 | substream->pcm->device, |
| 144 | substream->stream ? 'c' : 'p', |
| 145 | substream->number); |
| 146 | } |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 147 | EXPORT_SYMBOL(snd_pcm_debug_name); |
| 148 | #endif |
Takashi Iwai | c0070110 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 149 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 150 | #define XRUN_DEBUG_BASIC (1<<0) |
| 151 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ |
| 152 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 153 | |
| 154 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 155 | |
| 156 | #define xrun_debug(substream, mask) \ |
| 157 | ((substream)->pstr->xrun_debug & (mask)) |
Jarkko Nikula | 0f17014 | 2010-03-26 16:07:25 +0200 | [diff] [blame] | 158 | #else |
| 159 | #define xrun_debug(substream, mask) 0 |
| 160 | #endif |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 161 | |
| 162 | #define dump_stack_on_xrun(substream) do { \ |
| 163 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ |
| 164 | dump_stack(); \ |
| 165 | } while (0) |
| 166 | |
Takashi Iwai | 9cd641e | 2018-07-04 14:46:27 +0200 | [diff] [blame] | 167 | /* call with stream lock held */ |
| 168 | void __snd_pcm_xrun(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | { |
Jaroslav Kysela | 13f040f | 2009-05-28 11:31:20 +0200 | [diff] [blame] | 170 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 171 | |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 172 | trace_xrun(substream); |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 173 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
| 174 | struct timespec64 tstamp; |
| 175 | |
| 176 | snd_pcm_gettime(runtime, &tstamp); |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 177 | runtime->status->tstamp.tv_sec = tstamp.tv_sec; |
| 178 | runtime->status->tstamp.tv_nsec = tstamp.tv_nsec; |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 179 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
Jaroslav Kysela | 741b20c | 2009-12-17 17:34:39 +0100 | [diff] [blame] | 181 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
Takashi Iwai | c0070110 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 182 | char name[16]; |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 183 | snd_pcm_debug_name(substream, name, sizeof(name)); |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 184 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 185 | dump_stack_on_xrun(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Jarkko Nikula | 0f17014 | 2010-03-26 16:07:25 +0200 | [diff] [blame] | 189 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 190 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 191 | do { \ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 192 | trace_hw_ptr_error(substream, reason); \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 193 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 194 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
| 195 | (in_interrupt) ? 'Q' : 'P', ##args); \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 196 | dump_stack_on_xrun(substream); \ |
| 197 | } \ |
| 198 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 200 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
| 201 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 202 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 203 | |
| 204 | #endif |
| 205 | |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 206 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
| 207 | struct snd_pcm_runtime *runtime) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | { |
| 209 | snd_pcm_uframes_t avail; |
| 210 | |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 211 | avail = snd_pcm_avail(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | if (avail > runtime->avail_max) |
| 213 | runtime->avail_max = avail; |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 214 | if (runtime->state == SNDRV_PCM_STATE_DRAINING) { |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 215 | if (avail >= runtime->buffer_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | snd_pcm_drain_done(substream); |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 217 | return -EPIPE; |
| 218 | } |
| 219 | } else { |
| 220 | if (avail >= runtime->stop_threshold) { |
Takashi Iwai | 9cd641e | 2018-07-04 14:46:27 +0200 | [diff] [blame] | 221 | __snd_pcm_xrun(substream); |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 222 | return -EPIPE; |
| 223 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 225 | if (runtime->twake) { |
| 226 | if (avail >= runtime->twake) |
| 227 | wake_up(&runtime->tsleep); |
| 228 | } else if (avail >= runtime->control->avail_min) |
| 229 | wake_up(&runtime->sleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | return 0; |
| 231 | } |
| 232 | |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 233 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 234 | struct timespec64 *curr_tstamp, |
| 235 | struct timespec64 *audio_tstamp) |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 236 | { |
| 237 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 238 | u64 audio_frames, audio_nsecs; |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 239 | struct timespec64 driver_tstamp; |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 240 | |
| 241 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) |
| 242 | return; |
| 243 | |
| 244 | if (!(substream->ops->get_time_info) || |
| 245 | (runtime->audio_tstamp_report.actual_type == |
| 246 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { |
| 247 | |
| 248 | /* |
| 249 | * provide audio timestamp derived from pointer position |
| 250 | * add delay only if requested |
| 251 | */ |
| 252 | |
| 253 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; |
| 254 | |
| 255 | if (runtime->audio_tstamp_config.report_delay) { |
| 256 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 257 | audio_frames -= runtime->delay; |
| 258 | else |
| 259 | audio_frames += runtime->delay; |
| 260 | } |
| 261 | audio_nsecs = div_u64(audio_frames * 1000000000LL, |
| 262 | runtime->rate); |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 263 | *audio_tstamp = ns_to_timespec64(audio_nsecs); |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 264 | } |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 265 | |
| 266 | if (runtime->status->audio_tstamp.tv_sec != audio_tstamp->tv_sec || |
| 267 | runtime->status->audio_tstamp.tv_nsec != audio_tstamp->tv_nsec) { |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 268 | runtime->status->audio_tstamp.tv_sec = audio_tstamp->tv_sec; |
| 269 | runtime->status->audio_tstamp.tv_nsec = audio_tstamp->tv_nsec; |
| 270 | runtime->status->tstamp.tv_sec = curr_tstamp->tv_sec; |
| 271 | runtime->status->tstamp.tv_nsec = curr_tstamp->tv_nsec; |
Henrik Eriksson | 20e3f98 | 2017-11-21 09:29:28 +0100 | [diff] [blame] | 272 | } |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 273 | |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 274 | |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 275 | /* |
| 276 | * re-take a driver timestamp to let apps detect if the reference tstamp |
| 277 | * read by low-level hardware was provided with a delay |
| 278 | */ |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 279 | snd_pcm_gettime(substream->runtime, &driver_tstamp); |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 280 | runtime->driver_tstamp = driver_tstamp; |
| 281 | } |
| 282 | |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 283 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
| 284 | unsigned int in_interrupt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 286 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | snd_pcm_uframes_t pos; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 288 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 289 | snd_pcm_sframes_t hdelta, delta; |
| 290 | unsigned long jdelta; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 291 | unsigned long curr_jiffies; |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 292 | struct timespec64 curr_tstamp; |
| 293 | struct timespec64 audio_tstamp; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 294 | int crossed_boundary = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 296 | old_hw_ptr = runtime->status->hw_ptr; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 297 | |
| 298 | /* |
| 299 | * group pointer, time and jiffies reads to allow for more |
| 300 | * accurate correlations/corrections. |
| 301 | * The values are stored at the end of this routine after |
| 302 | * corrections for hw_ptr position |
| 303 | */ |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 304 | pos = substream->ops->pointer(substream); |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 305 | curr_jiffies = jiffies; |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 306 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 307 | if ((substream->ops->get_time_info) && |
| 308 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { |
| 309 | substream->ops->get_time_info(substream, &curr_tstamp, |
| 310 | &audio_tstamp, |
| 311 | &runtime->audio_tstamp_config, |
| 312 | &runtime->audio_tstamp_report); |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 313 | |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 314 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ |
| 315 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 316 | snd_pcm_gettime(runtime, &curr_tstamp); |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 317 | } else |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 318 | snd_pcm_gettime(runtime, &curr_tstamp); |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 319 | } |
| 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | if (pos == SNDRV_PCM_POS_XRUN) { |
Takashi Iwai | 9cd641e | 2018-07-04 14:46:27 +0200 | [diff] [blame] | 322 | __snd_pcm_xrun(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | return -EPIPE; |
| 324 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 325 | if (pos >= runtime->buffer_size) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 326 | if (printk_ratelimit()) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 327 | char name[16]; |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 328 | snd_pcm_debug_name(substream, name, sizeof(name)); |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 329 | pcm_err(substream->pcm, |
Takashi Iwai | 0ab1ace | 2016-03-10 20:56:20 +0100 | [diff] [blame] | 330 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 331 | name, pos, runtime->buffer_size, |
| 332 | runtime->period_size); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 333 | } |
| 334 | pos = 0; |
Takashi Iwai | cedb811 | 2009-07-23 11:04:13 +0200 | [diff] [blame] | 335 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 336 | pos -= pos % runtime->min_align; |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 337 | trace_hwptr(substream, pos, in_interrupt); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 338 | hw_base = runtime->hw_ptr_base; |
| 339 | new_hw_ptr = hw_base + pos; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 340 | if (in_interrupt) { |
| 341 | /* we know that one period was processed */ |
| 342 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 343 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 344 | if (delta > new_hw_ptr) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 345 | /* check for double acknowledged interrupts */ |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 346 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Koro Chen | 13a9883 | 2015-05-13 22:39:03 +0800 | [diff] [blame] | 347 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 348 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 349 | if (hw_base >= runtime->boundary) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 350 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 351 | crossed_boundary++; |
| 352 | } |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 353 | new_hw_ptr = hw_base + pos; |
| 354 | goto __delta; |
| 355 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 358 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
| 359 | /* pointer crosses the end of the ring buffer */ |
| 360 | if (new_hw_ptr < old_hw_ptr) { |
| 361 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 362 | if (hw_base >= runtime->boundary) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 363 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 364 | crossed_boundary++; |
| 365 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 366 | new_hw_ptr = hw_base + pos; |
| 367 | } |
| 368 | __delta: |
Clemens Ladisch | b406e61 | 2010-05-25 09:01:46 +0200 | [diff] [blame] | 369 | delta = new_hw_ptr - old_hw_ptr; |
| 370 | if (delta < 0) |
| 371 | delta += runtime->boundary; |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 372 | |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 373 | if (runtime->no_period_wakeup) { |
Kelly Anderson | 12ff414 | 2011-04-01 11:58:25 +0200 | [diff] [blame] | 374 | snd_pcm_sframes_t xrun_threshold; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 375 | /* |
| 376 | * Without regular period interrupts, we have to check |
| 377 | * the elapsed time to detect xruns. |
| 378 | */ |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 379 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Clemens Ladisch | 47228e4 | 2010-11-18 09:53:07 +0100 | [diff] [blame] | 380 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
| 381 | goto no_delta_check; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 382 | hdelta = jdelta - delta * HZ / runtime->rate; |
Kelly Anderson | 12ff414 | 2011-04-01 11:58:25 +0200 | [diff] [blame] | 383 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
| 384 | while (hdelta > xrun_threshold) { |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 385 | delta += runtime->buffer_size; |
| 386 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 387 | if (hw_base >= runtime->boundary) { |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 388 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 389 | crossed_boundary++; |
| 390 | } |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 391 | new_hw_ptr = hw_base + pos; |
| 392 | hdelta -= runtime->hw_ptr_buffer_jiffies; |
| 393 | } |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 394 | goto no_delta_check; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 395 | } |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 396 | |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 397 | /* something must be really wrong */ |
Jaroslav Kysela | 7b3a177 | 2010-01-08 08:43:01 +0100 | [diff] [blame] | 398 | if (delta >= runtime->buffer_size + runtime->period_size) { |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 399 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
| 400 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", |
| 401 | substream->stream, (long)pos, |
| 402 | (long)new_hw_ptr, (long)old_hw_ptr); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 403 | return 0; |
| 404 | } |
Takashi Iwai | c87d973 | 2009-05-27 10:53:33 +0200 | [diff] [blame] | 405 | |
| 406 | /* Do jiffies check only in xrun_debug mode */ |
Jaroslav Kysela | 741b20c | 2009-12-17 17:34:39 +0100 | [diff] [blame] | 407 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
Takashi Iwai | c87d973 | 2009-05-27 10:53:33 +0200 | [diff] [blame] | 408 | goto no_jiffies_check; |
| 409 | |
Takashi Iwai | 3e5b501 | 2009-04-28 12:07:08 +0200 | [diff] [blame] | 410 | /* Skip the jiffies check for hardwares with BATCH flag. |
| 411 | * Such hardware usually just increases the position at each IRQ, |
| 412 | * thus it can't give any strange position. |
| 413 | */ |
| 414 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) |
| 415 | goto no_jiffies_check; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 416 | hdelta = delta; |
Jaroslav Kysela | a4444da | 2009-05-28 12:31:56 +0200 | [diff] [blame] | 417 | if (hdelta < runtime->delay) |
| 418 | goto no_jiffies_check; |
| 419 | hdelta -= runtime->delay; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 420 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 421 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
| 422 | delta = jdelta / |
| 423 | (((runtime->period_size * HZ) / runtime->rate) |
| 424 | + HZ/100); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 425 | /* move new_hw_ptr according jiffies not pos variable */ |
| 426 | new_hw_ptr = old_hw_ptr; |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 427 | hw_base = delta; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 428 | /* use loop to avoid checks for delta overflows */ |
| 429 | /* the delta value is small or zero in most cases */ |
| 430 | while (delta > 0) { |
| 431 | new_hw_ptr += runtime->period_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 432 | if (new_hw_ptr >= runtime->boundary) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 433 | new_hw_ptr -= runtime->boundary; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 434 | crossed_boundary--; |
| 435 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 436 | delta--; |
| 437 | } |
| 438 | /* align hw_base to buffer_size */ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 439 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
| 440 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 441 | (long)pos, (long)hdelta, |
| 442 | (long)runtime->period_size, jdelta, |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 443 | ((hdelta * HZ) / runtime->rate), hw_base, |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 444 | (unsigned long)old_hw_ptr, |
| 445 | (unsigned long)new_hw_ptr); |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 446 | /* reset values to proper state */ |
| 447 | delta = 0; |
| 448 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 449 | } |
Takashi Iwai | 3e5b501 | 2009-04-28 12:07:08 +0200 | [diff] [blame] | 450 | no_jiffies_check: |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 451 | if (delta > runtime->period_size + runtime->period_size / 2) { |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 452 | hw_ptr_error(substream, in_interrupt, |
| 453 | "Lost interrupts?", |
| 454 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 455 | substream->stream, (long)delta, |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 456 | (long)new_hw_ptr, |
| 457 | (long)old_hw_ptr); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 458 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 459 | |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 460 | no_delta_check: |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 461 | if (runtime->status->hw_ptr == new_hw_ptr) { |
Brent Lu | e7513c5 | 2020-05-18 12:30:38 +0800 | [diff] [blame] | 462 | runtime->hw_ptr_jiffies = curr_jiffies; |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 463 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 464 | return 0; |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 465 | } |
Takashi Iwai | ab1863f | 2009-06-07 12:09:17 +0200 | [diff] [blame] | 466 | |
Jaroslav Kysela | d7f5dd97 | 2023-05-05 17:52:38 +0200 | [diff] [blame] | 467 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 468 | runtime->silence_size > 0) |
| 469 | snd_pcm_playback_silence(substream, new_hw_ptr); |
| 470 | |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 471 | if (in_interrupt) { |
Clemens Ladisch | ead4046 | 2010-05-21 09:15:59 +0200 | [diff] [blame] | 472 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
| 473 | if (delta < 0) |
| 474 | delta += runtime->boundary; |
| 475 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; |
| 476 | runtime->hw_ptr_interrupt += delta; |
| 477 | if (runtime->hw_ptr_interrupt >= runtime->boundary) |
| 478 | runtime->hw_ptr_interrupt -= runtime->boundary; |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 479 | } |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 480 | runtime->hw_ptr_base = hw_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | runtime->status->hw_ptr = new_hw_ptr; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 482 | runtime->hw_ptr_jiffies = curr_jiffies; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 483 | if (crossed_boundary) { |
| 484 | snd_BUG_ON(crossed_boundary != 1); |
| 485 | runtime->hw_ptr_wrap += runtime->boundary; |
| 486 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 488 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 489 | |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 490 | return snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | /* CAUTION: call it with irq disabled */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 494 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 496 | return snd_pcm_update_hw_ptr0(substream, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | /** |
| 500 | * snd_pcm_set_ops - set the PCM operators |
| 501 | * @pcm: the pcm instance |
| 502 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX |
| 503 | * @ops: the operator table |
| 504 | * |
| 505 | * Sets the given PCM operators to the pcm instance. |
| 506 | */ |
Lars-Peter Clausen | e6c2e7e | 2013-05-24 15:18:10 +0200 | [diff] [blame] | 507 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
| 508 | const struct snd_pcm_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 510 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
| 511 | struct snd_pcm_substream *substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | for (substream = stream->substream; substream != NULL; substream = substream->next) |
| 514 | substream->ops = ops; |
| 515 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 516 | EXPORT_SYMBOL(snd_pcm_set_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | /** |
Mauro Carvalho Chehab | f7b6603 | 2020-10-23 18:33:35 +0200 | [diff] [blame] | 519 | * snd_pcm_set_sync - set the PCM sync id |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | * @substream: the pcm substream |
| 521 | * |
| 522 | * Sets the PCM sync identifier for the card. |
| 523 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 524 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 526 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
| 528 | runtime->sync.id32[0] = substream->pcm->card->number; |
| 529 | runtime->sync.id32[1] = -1; |
| 530 | runtime->sync.id32[2] = -1; |
| 531 | runtime->sync.id32[3] = -1; |
| 532 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 533 | EXPORT_SYMBOL(snd_pcm_set_sync); |
| 534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | /* |
| 536 | * Standard ioctl routine |
| 537 | */ |
| 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | static inline unsigned int div32(unsigned int a, unsigned int b, |
| 540 | unsigned int *r) |
| 541 | { |
| 542 | if (b == 0) { |
| 543 | *r = 0; |
| 544 | return UINT_MAX; |
| 545 | } |
| 546 | *r = a % b; |
| 547 | return a / b; |
| 548 | } |
| 549 | |
| 550 | static inline unsigned int div_down(unsigned int a, unsigned int b) |
| 551 | { |
| 552 | if (b == 0) |
| 553 | return UINT_MAX; |
| 554 | return a / b; |
| 555 | } |
| 556 | |
| 557 | static inline unsigned int div_up(unsigned int a, unsigned int b) |
| 558 | { |
| 559 | unsigned int r; |
| 560 | unsigned int q; |
| 561 | if (b == 0) |
| 562 | return UINT_MAX; |
| 563 | q = div32(a, b, &r); |
| 564 | if (r) |
| 565 | ++q; |
| 566 | return q; |
| 567 | } |
| 568 | |
| 569 | static inline unsigned int mul(unsigned int a, unsigned int b) |
| 570 | { |
| 571 | if (a == 0) |
| 572 | return 0; |
| 573 | if (div_down(UINT_MAX, a) < b) |
| 574 | return UINT_MAX; |
| 575 | return a * b; |
| 576 | } |
| 577 | |
| 578 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, |
| 579 | unsigned int c, unsigned int *r) |
| 580 | { |
| 581 | u_int64_t n = (u_int64_t) a * b; |
| 582 | if (c == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | *r = 0; |
| 584 | return UINT_MAX; |
| 585 | } |
Takashi Iwai | 3f7440a | 2009-06-05 17:40:04 +0200 | [diff] [blame] | 586 | n = div_u64_rem(n, c, r); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | if (n >= UINT_MAX) { |
| 588 | *r = 0; |
| 589 | return UINT_MAX; |
| 590 | } |
| 591 | return n; |
| 592 | } |
| 593 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | /** |
| 595 | * snd_interval_refine - refine the interval value of configurator |
| 596 | * @i: the interval value to refine |
| 597 | * @v: the interval value to refer to |
| 598 | * |
| 599 | * Refines the interval value with the reference value. |
| 600 | * The interval is changed to the range satisfying both intervals. |
| 601 | * The interval status (min, max, integer, etc.) are evaluated. |
| 602 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 603 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 604 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 606 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | { |
| 608 | int changed = 0; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 609 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 610 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | if (i->min < v->min) { |
| 612 | i->min = v->min; |
| 613 | i->openmin = v->openmin; |
| 614 | changed = 1; |
| 615 | } else if (i->min == v->min && !i->openmin && v->openmin) { |
| 616 | i->openmin = 1; |
| 617 | changed = 1; |
| 618 | } |
| 619 | if (i->max > v->max) { |
| 620 | i->max = v->max; |
| 621 | i->openmax = v->openmax; |
| 622 | changed = 1; |
| 623 | } else if (i->max == v->max && !i->openmax && v->openmax) { |
| 624 | i->openmax = 1; |
| 625 | changed = 1; |
| 626 | } |
| 627 | if (!i->integer && v->integer) { |
| 628 | i->integer = 1; |
| 629 | changed = 1; |
| 630 | } |
| 631 | if (i->integer) { |
| 632 | if (i->openmin) { |
| 633 | i->min++; |
| 634 | i->openmin = 0; |
| 635 | } |
| 636 | if (i->openmax) { |
| 637 | i->max--; |
| 638 | i->openmax = 0; |
| 639 | } |
| 640 | } else if (!i->openmin && !i->openmax && i->min == i->max) |
| 641 | i->integer = 1; |
| 642 | if (snd_interval_checkempty(i)) { |
| 643 | snd_interval_none(i); |
| 644 | return -EINVAL; |
| 645 | } |
| 646 | return changed; |
| 647 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 648 | EXPORT_SYMBOL(snd_interval_refine); |
| 649 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 650 | static int snd_interval_refine_first(struct snd_interval *i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
Timo Wischer | ff2d6ac | 2018-07-10 17:28:45 +0200 | [diff] [blame] | 652 | const unsigned int last_max = i->max; |
| 653 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 654 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 655 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | if (snd_interval_single(i)) |
| 657 | return 0; |
| 658 | i->max = i->min; |
Timo Wischer | ff2d6ac | 2018-07-10 17:28:45 +0200 | [diff] [blame] | 659 | if (i->openmin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | i->max++; |
Timo Wischer | ff2d6ac | 2018-07-10 17:28:45 +0200 | [diff] [blame] | 661 | /* only exclude max value if also excluded before refine */ |
| 662 | i->openmax = (i->openmax && i->max >= last_max); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | return 1; |
| 664 | } |
| 665 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 666 | static int snd_interval_refine_last(struct snd_interval *i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | { |
Timo Wischer | ff2d6ac | 2018-07-10 17:28:45 +0200 | [diff] [blame] | 668 | const unsigned int last_min = i->min; |
| 669 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 670 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 671 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | if (snd_interval_single(i)) |
| 673 | return 0; |
| 674 | i->min = i->max; |
Timo Wischer | ff2d6ac | 2018-07-10 17:28:45 +0200 | [diff] [blame] | 675 | if (i->openmax) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | i->min--; |
Timo Wischer | ff2d6ac | 2018-07-10 17:28:45 +0200 | [diff] [blame] | 677 | /* only exclude min value if also excluded before refine */ |
| 678 | i->openmin = (i->openmin && i->min <= last_min); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | return 1; |
| 680 | } |
| 681 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 682 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | { |
| 684 | if (a->empty || b->empty) { |
| 685 | snd_interval_none(c); |
| 686 | return; |
| 687 | } |
| 688 | c->empty = 0; |
| 689 | c->min = mul(a->min, b->min); |
| 690 | c->openmin = (a->openmin || b->openmin); |
| 691 | c->max = mul(a->max, b->max); |
| 692 | c->openmax = (a->openmax || b->openmax); |
| 693 | c->integer = (a->integer && b->integer); |
| 694 | } |
| 695 | |
| 696 | /** |
| 697 | * snd_interval_div - refine the interval value with division |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 698 | * @a: dividend |
| 699 | * @b: divisor |
| 700 | * @c: quotient |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | * |
| 702 | * c = a / b |
| 703 | * |
| 704 | * Returns non-zero if the value is changed, zero if not changed. |
| 705 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 706 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
| 708 | unsigned int r; |
| 709 | if (a->empty || b->empty) { |
| 710 | snd_interval_none(c); |
| 711 | return; |
| 712 | } |
| 713 | c->empty = 0; |
| 714 | c->min = div32(a->min, b->max, &r); |
| 715 | c->openmin = (r || a->openmin || b->openmax); |
| 716 | if (b->min > 0) { |
| 717 | c->max = div32(a->max, b->min, &r); |
| 718 | if (r) { |
| 719 | c->max++; |
| 720 | c->openmax = 1; |
| 721 | } else |
| 722 | c->openmax = (a->openmax || b->openmin); |
| 723 | } else { |
| 724 | c->max = UINT_MAX; |
| 725 | c->openmax = 0; |
| 726 | } |
| 727 | c->integer = 0; |
| 728 | } |
| 729 | |
| 730 | /** |
| 731 | * snd_interval_muldivk - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 732 | * @a: dividend 1 |
| 733 | * @b: dividend 2 |
| 734 | * @k: divisor (as integer) |
| 735 | * @c: result |
| 736 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | * c = a * b / k |
| 738 | * |
| 739 | * Returns non-zero if the value is changed, zero if not changed. |
| 740 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 741 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
| 742 | unsigned int k, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | { |
| 744 | unsigned int r; |
| 745 | if (a->empty || b->empty) { |
| 746 | snd_interval_none(c); |
| 747 | return; |
| 748 | } |
| 749 | c->empty = 0; |
| 750 | c->min = muldiv32(a->min, b->min, k, &r); |
| 751 | c->openmin = (r || a->openmin || b->openmin); |
| 752 | c->max = muldiv32(a->max, b->max, k, &r); |
| 753 | if (r) { |
| 754 | c->max++; |
| 755 | c->openmax = 1; |
| 756 | } else |
| 757 | c->openmax = (a->openmax || b->openmax); |
| 758 | c->integer = 0; |
| 759 | } |
| 760 | |
| 761 | /** |
| 762 | * snd_interval_mulkdiv - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 763 | * @a: dividend 1 |
| 764 | * @k: dividend 2 (as integer) |
| 765 | * @b: divisor |
| 766 | * @c: result |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | * |
| 768 | * c = a * k / b |
| 769 | * |
| 770 | * Returns non-zero if the value is changed, zero if not changed. |
| 771 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 772 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
| 773 | const struct snd_interval *b, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | { |
| 775 | unsigned int r; |
| 776 | if (a->empty || b->empty) { |
| 777 | snd_interval_none(c); |
| 778 | return; |
| 779 | } |
| 780 | c->empty = 0; |
| 781 | c->min = muldiv32(a->min, k, b->max, &r); |
| 782 | c->openmin = (r || a->openmin || b->openmax); |
| 783 | if (b->min > 0) { |
| 784 | c->max = muldiv32(a->max, k, b->min, &r); |
| 785 | if (r) { |
| 786 | c->max++; |
| 787 | c->openmax = 1; |
| 788 | } else |
| 789 | c->openmax = (a->openmax || b->openmin); |
| 790 | } else { |
| 791 | c->max = UINT_MAX; |
| 792 | c->openmax = 0; |
| 793 | } |
| 794 | c->integer = 0; |
| 795 | } |
| 796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | /* ---- */ |
| 798 | |
| 799 | |
| 800 | /** |
| 801 | * snd_interval_ratnum - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 802 | * @i: interval to refine |
| 803 | * @rats_count: number of ratnum_t |
| 804 | * @rats: ratnum_t array |
| 805 | * @nump: pointer to store the resultant numerator |
| 806 | * @denp: pointer to store the resultant denominator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 808 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 809 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 811 | int snd_interval_ratnum(struct snd_interval *i, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 812 | unsigned int rats_count, const struct snd_ratnum *rats, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 813 | unsigned int *nump, unsigned int *denp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | { |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 815 | unsigned int best_num, best_den; |
| 816 | int best_diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | unsigned int k; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 818 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | int err; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 820 | unsigned int result_num, result_den; |
| 821 | int result_diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
| 823 | best_num = best_den = best_diff = 0; |
| 824 | for (k = 0; k < rats_count; ++k) { |
| 825 | unsigned int num = rats[k].num; |
| 826 | unsigned int den; |
| 827 | unsigned int q = i->min; |
| 828 | int diff; |
| 829 | if (q == 0) |
| 830 | q = 1; |
Krzysztof Helt | 40962d7 | 2009-12-19 18:31:04 +0100 | [diff] [blame] | 831 | den = div_up(num, q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | if (den < rats[k].den_min) |
| 833 | continue; |
| 834 | if (den > rats[k].den_max) |
| 835 | den = rats[k].den_max; |
| 836 | else { |
| 837 | unsigned int r; |
| 838 | r = (den - rats[k].den_min) % rats[k].den_step; |
| 839 | if (r != 0) |
| 840 | den -= r; |
| 841 | } |
| 842 | diff = num - q * den; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 843 | if (diff < 0) |
| 844 | diff = -diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | if (best_num == 0 || |
| 846 | diff * best_den < best_diff * den) { |
| 847 | best_diff = diff; |
| 848 | best_den = den; |
| 849 | best_num = num; |
| 850 | } |
| 851 | } |
| 852 | if (best_den == 0) { |
| 853 | i->empty = 1; |
| 854 | return -EINVAL; |
| 855 | } |
| 856 | t.min = div_down(best_num, best_den); |
| 857 | t.openmin = !!(best_num % best_den); |
| 858 | |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 859 | result_num = best_num; |
| 860 | result_diff = best_diff; |
| 861 | result_den = best_den; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | best_num = best_den = best_diff = 0; |
| 863 | for (k = 0; k < rats_count; ++k) { |
| 864 | unsigned int num = rats[k].num; |
| 865 | unsigned int den; |
| 866 | unsigned int q = i->max; |
| 867 | int diff; |
| 868 | if (q == 0) { |
| 869 | i->empty = 1; |
| 870 | return -EINVAL; |
| 871 | } |
Krzysztof Helt | 40962d7 | 2009-12-19 18:31:04 +0100 | [diff] [blame] | 872 | den = div_down(num, q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | if (den > rats[k].den_max) |
| 874 | continue; |
| 875 | if (den < rats[k].den_min) |
| 876 | den = rats[k].den_min; |
| 877 | else { |
| 878 | unsigned int r; |
| 879 | r = (den - rats[k].den_min) % rats[k].den_step; |
| 880 | if (r != 0) |
| 881 | den += rats[k].den_step - r; |
| 882 | } |
| 883 | diff = q * den - num; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 884 | if (diff < 0) |
| 885 | diff = -diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | if (best_num == 0 || |
| 887 | diff * best_den < best_diff * den) { |
| 888 | best_diff = diff; |
| 889 | best_den = den; |
| 890 | best_num = num; |
| 891 | } |
| 892 | } |
| 893 | if (best_den == 0) { |
| 894 | i->empty = 1; |
| 895 | return -EINVAL; |
| 896 | } |
| 897 | t.max = div_up(best_num, best_den); |
| 898 | t.openmax = !!(best_num % best_den); |
| 899 | t.integer = 0; |
| 900 | err = snd_interval_refine(i, &t); |
| 901 | if (err < 0) |
| 902 | return err; |
| 903 | |
| 904 | if (snd_interval_single(i)) { |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 905 | if (best_diff * result_den < result_diff * best_den) { |
| 906 | result_num = best_num; |
| 907 | result_den = best_den; |
| 908 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | if (nump) |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 910 | *nump = result_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | if (denp) |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 912 | *denp = result_den; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | } |
| 914 | return err; |
| 915 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 916 | EXPORT_SYMBOL(snd_interval_ratnum); |
| 917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | /** |
| 919 | * snd_interval_ratden - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 920 | * @i: interval to refine |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 921 | * @rats_count: number of struct ratden |
| 922 | * @rats: struct ratden array |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 923 | * @nump: pointer to store the resultant numerator |
| 924 | * @denp: pointer to store the resultant denominator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 926 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 927 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 929 | static int snd_interval_ratden(struct snd_interval *i, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 930 | unsigned int rats_count, |
| 931 | const struct snd_ratden *rats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | unsigned int *nump, unsigned int *denp) |
| 933 | { |
| 934 | unsigned int best_num, best_diff, best_den; |
| 935 | unsigned int k; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 936 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | int err; |
| 938 | |
| 939 | best_num = best_den = best_diff = 0; |
| 940 | for (k = 0; k < rats_count; ++k) { |
| 941 | unsigned int num; |
| 942 | unsigned int den = rats[k].den; |
| 943 | unsigned int q = i->min; |
| 944 | int diff; |
| 945 | num = mul(q, den); |
| 946 | if (num > rats[k].num_max) |
| 947 | continue; |
| 948 | if (num < rats[k].num_min) |
| 949 | num = rats[k].num_max; |
| 950 | else { |
| 951 | unsigned int r; |
| 952 | r = (num - rats[k].num_min) % rats[k].num_step; |
| 953 | if (r != 0) |
| 954 | num += rats[k].num_step - r; |
| 955 | } |
| 956 | diff = num - q * den; |
| 957 | if (best_num == 0 || |
| 958 | diff * best_den < best_diff * den) { |
| 959 | best_diff = diff; |
| 960 | best_den = den; |
| 961 | best_num = num; |
| 962 | } |
| 963 | } |
| 964 | if (best_den == 0) { |
| 965 | i->empty = 1; |
| 966 | return -EINVAL; |
| 967 | } |
| 968 | t.min = div_down(best_num, best_den); |
| 969 | t.openmin = !!(best_num % best_den); |
| 970 | |
| 971 | best_num = best_den = best_diff = 0; |
| 972 | for (k = 0; k < rats_count; ++k) { |
| 973 | unsigned int num; |
| 974 | unsigned int den = rats[k].den; |
| 975 | unsigned int q = i->max; |
| 976 | int diff; |
| 977 | num = mul(q, den); |
| 978 | if (num < rats[k].num_min) |
| 979 | continue; |
| 980 | if (num > rats[k].num_max) |
| 981 | num = rats[k].num_max; |
| 982 | else { |
| 983 | unsigned int r; |
| 984 | r = (num - rats[k].num_min) % rats[k].num_step; |
| 985 | if (r != 0) |
| 986 | num -= r; |
| 987 | } |
| 988 | diff = q * den - num; |
| 989 | if (best_num == 0 || |
| 990 | diff * best_den < best_diff * den) { |
| 991 | best_diff = diff; |
| 992 | best_den = den; |
| 993 | best_num = num; |
| 994 | } |
| 995 | } |
| 996 | if (best_den == 0) { |
| 997 | i->empty = 1; |
| 998 | return -EINVAL; |
| 999 | } |
| 1000 | t.max = div_up(best_num, best_den); |
| 1001 | t.openmax = !!(best_num % best_den); |
| 1002 | t.integer = 0; |
| 1003 | err = snd_interval_refine(i, &t); |
| 1004 | if (err < 0) |
| 1005 | return err; |
| 1006 | |
| 1007 | if (snd_interval_single(i)) { |
| 1008 | if (nump) |
| 1009 | *nump = best_num; |
| 1010 | if (denp) |
| 1011 | *denp = best_den; |
| 1012 | } |
| 1013 | return err; |
| 1014 | } |
| 1015 | |
| 1016 | /** |
| 1017 | * snd_interval_list - refine the interval value from the list |
| 1018 | * @i: the interval value to refine |
| 1019 | * @count: the number of elements in the list |
| 1020 | * @list: the value list |
| 1021 | * @mask: the bit-mask to evaluate |
| 1022 | * |
| 1023 | * Refines the interval value from the list. |
| 1024 | * When mask is non-zero, only the elements corresponding to bit 1 are |
| 1025 | * evaluated. |
| 1026 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1027 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1028 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | */ |
Mark Brown | 4af87a9 | 2012-03-14 19:48:43 +0000 | [diff] [blame] | 1030 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
| 1031 | const unsigned int *list, unsigned int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | { |
| 1033 | unsigned int k; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1034 | struct snd_interval list_range; |
Takashi Iwai | 0981a26 | 2007-02-01 14:53:49 +0100 | [diff] [blame] | 1035 | |
| 1036 | if (!count) { |
| 1037 | i->empty = 1; |
| 1038 | return -EINVAL; |
| 1039 | } |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1040 | snd_interval_any(&list_range); |
| 1041 | list_range.min = UINT_MAX; |
| 1042 | list_range.max = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | for (k = 0; k < count; k++) { |
| 1044 | if (mask && !(mask & (1 << k))) |
| 1045 | continue; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1046 | if (!snd_interval_test(i, list[k])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | continue; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1048 | list_range.min = min(list_range.min, list[k]); |
| 1049 | list_range.max = max(list_range.max, list[k]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1051 | return snd_interval_refine(i, &list_range); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1053 | EXPORT_SYMBOL(snd_interval_list); |
| 1054 | |
Peter Rosin | f66f898 | 2015-01-28 15:16:06 +0100 | [diff] [blame] | 1055 | /** |
| 1056 | * snd_interval_ranges - refine the interval value from the list of ranges |
| 1057 | * @i: the interval value to refine |
| 1058 | * @count: the number of elements in the list of ranges |
| 1059 | * @ranges: the ranges list |
| 1060 | * @mask: the bit-mask to evaluate |
| 1061 | * |
| 1062 | * Refines the interval value from the list of ranges. |
| 1063 | * When mask is non-zero, only the elements corresponding to bit 1 are |
| 1064 | * evaluated. |
| 1065 | * |
| 1066 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1067 | * negative error code. |
| 1068 | */ |
| 1069 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, |
| 1070 | const struct snd_interval *ranges, unsigned int mask) |
| 1071 | { |
| 1072 | unsigned int k; |
| 1073 | struct snd_interval range_union; |
| 1074 | struct snd_interval range; |
| 1075 | |
| 1076 | if (!count) { |
| 1077 | snd_interval_none(i); |
| 1078 | return -EINVAL; |
| 1079 | } |
| 1080 | snd_interval_any(&range_union); |
| 1081 | range_union.min = UINT_MAX; |
| 1082 | range_union.max = 0; |
| 1083 | for (k = 0; k < count; k++) { |
| 1084 | if (mask && !(mask & (1 << k))) |
| 1085 | continue; |
| 1086 | snd_interval_copy(&range, &ranges[k]); |
| 1087 | if (snd_interval_refine(&range, i) < 0) |
| 1088 | continue; |
| 1089 | if (snd_interval_empty(&range)) |
| 1090 | continue; |
| 1091 | |
| 1092 | if (range.min < range_union.min) { |
| 1093 | range_union.min = range.min; |
| 1094 | range_union.openmin = 1; |
| 1095 | } |
| 1096 | if (range.min == range_union.min && !range.openmin) |
| 1097 | range_union.openmin = 0; |
| 1098 | if (range.max > range_union.max) { |
| 1099 | range_union.max = range.max; |
| 1100 | range_union.openmax = 1; |
| 1101 | } |
| 1102 | if (range.max == range_union.max && !range.openmax) |
| 1103 | range_union.openmax = 0; |
| 1104 | } |
| 1105 | return snd_interval_refine(i, &range_union); |
| 1106 | } |
| 1107 | EXPORT_SYMBOL(snd_interval_ranges); |
| 1108 | |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1109 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | { |
| 1111 | unsigned int n; |
| 1112 | int changed = 0; |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1113 | n = i->min % step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | if (n != 0 || i->openmin) { |
| 1115 | i->min += step - n; |
Clemens Ladisch | df1e471 | 2014-09-07 21:43:41 +0200 | [diff] [blame] | 1116 | i->openmin = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | changed = 1; |
| 1118 | } |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1119 | n = i->max % step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | if (n != 0 || i->openmax) { |
| 1121 | i->max -= n; |
Clemens Ladisch | df1e471 | 2014-09-07 21:43:41 +0200 | [diff] [blame] | 1122 | i->openmax = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | changed = 1; |
| 1124 | } |
| 1125 | if (snd_interval_checkempty(i)) { |
| 1126 | i->empty = 1; |
| 1127 | return -EINVAL; |
| 1128 | } |
| 1129 | return changed; |
| 1130 | } |
| 1131 | |
| 1132 | /* Info constraints helpers */ |
| 1133 | |
| 1134 | /** |
| 1135 | * snd_pcm_hw_rule_add - add the hw-constraint rule |
| 1136 | * @runtime: the pcm runtime instance |
| 1137 | * @cond: condition bits |
| 1138 | * @var: the variable to evaluate |
| 1139 | * @func: the evaluation function |
| 1140 | * @private: the private data pointer passed to function |
| 1141 | * @dep: the dependent variables |
| 1142 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1143 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1145 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | int var, |
| 1147 | snd_pcm_hw_rule_func_t func, void *private, |
| 1148 | int dep, ...) |
| 1149 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1150 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1151 | struct snd_pcm_hw_rule *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | unsigned int k; |
| 1153 | va_list args; |
| 1154 | va_start(args, dep); |
| 1155 | if (constrs->rules_num >= constrs->rules_all) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1156 | struct snd_pcm_hw_rule *new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | unsigned int new_rules = constrs->rules_all + 16; |
Bartosz Golaszewski | 64f0bd1 | 2020-12-14 19:03:59 -0800 | [diff] [blame] | 1158 | new = krealloc_array(constrs->rules, new_rules, |
| 1159 | sizeof(*c), GFP_KERNEL); |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1160 | if (!new) { |
| 1161 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | return -ENOMEM; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1163 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | constrs->rules = new; |
| 1165 | constrs->rules_all = new_rules; |
| 1166 | } |
| 1167 | c = &constrs->rules[constrs->rules_num]; |
| 1168 | c->cond = cond; |
| 1169 | c->func = func; |
| 1170 | c->var = var; |
| 1171 | c->private = private; |
| 1172 | k = 0; |
| 1173 | while (1) { |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1174 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
| 1175 | va_end(args); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1176 | return -EINVAL; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | c->deps[k++] = dep; |
| 1179 | if (dep < 0) |
| 1180 | break; |
| 1181 | dep = va_arg(args, int); |
| 1182 | } |
| 1183 | constrs->rules_num++; |
| 1184 | va_end(args); |
| 1185 | return 0; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1186 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1187 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
| 1188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1190 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1191 | * @runtime: PCM runtime instance |
| 1192 | * @var: hw_params variable to apply the mask |
| 1193 | * @mask: the bitmap mask |
| 1194 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1195 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1196 | * |
| 1197 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1199 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | u_int32_t mask) |
| 1201 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1202 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1203 | struct snd_mask *maskp = constrs_mask(constrs, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | *maskp->bits &= mask; |
| 1205 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ |
| 1206 | if (*maskp->bits == 0) |
| 1207 | return -EINVAL; |
| 1208 | return 0; |
| 1209 | } |
| 1210 | |
| 1211 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1212 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1213 | * @runtime: PCM runtime instance |
| 1214 | * @var: hw_params variable to apply the mask |
| 1215 | * @mask: the 64bit bitmap mask |
| 1216 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1217 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1218 | * |
| 1219 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1221 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | u_int64_t mask) |
| 1223 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1224 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1225 | struct snd_mask *maskp = constrs_mask(constrs, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | maskp->bits[0] &= (u_int32_t)mask; |
| 1227 | maskp->bits[1] &= (u_int32_t)(mask >> 32); |
| 1228 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ |
| 1229 | if (! maskp->bits[0] && ! maskp->bits[1]) |
| 1230 | return -EINVAL; |
| 1231 | return 0; |
| 1232 | } |
Mark Brown | 63a5d4c | 2014-02-20 12:13:52 +0900 | [diff] [blame] | 1233 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
| 1235 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1236 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1237 | * @runtime: PCM runtime instance |
| 1238 | * @var: hw_params variable to apply the integer constraint |
| 1239 | * |
| 1240 | * Apply the constraint of integer to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1241 | * |
| 1242 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1243 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1245 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1247 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
| 1249 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1250 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
| 1251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1253 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1254 | * @runtime: PCM runtime instance |
| 1255 | * @var: hw_params variable to apply the range |
| 1256 | * @min: the minimal value |
| 1257 | * @max: the maximal value |
| 1258 | * |
| 1259 | * Apply the min/max range constraint to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1260 | * |
| 1261 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1262 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1264 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | unsigned int min, unsigned int max) |
| 1266 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1267 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1268 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | t.min = min; |
| 1270 | t.max = max; |
| 1271 | t.openmin = t.openmax = 0; |
| 1272 | t.integer = 0; |
| 1273 | return snd_interval_refine(constrs_interval(constrs, var), &t); |
| 1274 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1275 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
| 1276 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1277 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
| 1278 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1280 | struct snd_pcm_hw_constraint_list *list = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
| 1282 | } |
| 1283 | |
| 1284 | |
| 1285 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1286 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1287 | * @runtime: PCM runtime instance |
| 1288 | * @cond: condition bits |
| 1289 | * @var: hw_params variable to apply the list constraint |
| 1290 | * @l: list |
| 1291 | * |
| 1292 | * Apply the list of constraints to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1293 | * |
| 1294 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1296 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | unsigned int cond, |
| 1298 | snd_pcm_hw_param_t var, |
Mark Brown | 1464189 | 2012-07-05 12:15:01 +0100 | [diff] [blame] | 1299 | const struct snd_pcm_hw_constraint_list *l) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | { |
| 1301 | return snd_pcm_hw_rule_add(runtime, cond, var, |
Mark Brown | 1464189 | 2012-07-05 12:15:01 +0100 | [diff] [blame] | 1302 | snd_pcm_hw_rule_list, (void *)l, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | var, -1); |
| 1304 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1305 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
| 1306 | |
Peter Rosin | f66f898 | 2015-01-28 15:16:06 +0100 | [diff] [blame] | 1307 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
| 1308 | struct snd_pcm_hw_rule *rule) |
| 1309 | { |
| 1310 | struct snd_pcm_hw_constraint_ranges *r = rule->private; |
| 1311 | return snd_interval_ranges(hw_param_interval(params, rule->var), |
| 1312 | r->count, r->ranges, r->mask); |
| 1313 | } |
| 1314 | |
| 1315 | |
| 1316 | /** |
| 1317 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter |
| 1318 | * @runtime: PCM runtime instance |
| 1319 | * @cond: condition bits |
| 1320 | * @var: hw_params variable to apply the list of range constraints |
| 1321 | * @r: ranges |
| 1322 | * |
| 1323 | * Apply the list of range constraints to an interval parameter. |
| 1324 | * |
| 1325 | * Return: Zero if successful, or a negative error code on failure. |
| 1326 | */ |
| 1327 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, |
| 1328 | unsigned int cond, |
| 1329 | snd_pcm_hw_param_t var, |
| 1330 | const struct snd_pcm_hw_constraint_ranges *r) |
| 1331 | { |
| 1332 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1333 | snd_pcm_hw_rule_ranges, (void *)r, |
| 1334 | var, -1); |
| 1335 | } |
| 1336 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); |
| 1337 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1338 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
| 1339 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | { |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1341 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | unsigned int num = 0, den = 0; |
| 1343 | int err; |
| 1344 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), |
| 1345 | r->nrats, r->rats, &num, &den); |
| 1346 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { |
| 1347 | params->rate_num = num; |
| 1348 | params->rate_den = den; |
| 1349 | } |
| 1350 | return err; |
| 1351 | } |
| 1352 | |
| 1353 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1354 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1355 | * @runtime: PCM runtime instance |
| 1356 | * @cond: condition bits |
| 1357 | * @var: hw_params variable to apply the ratnums constraint |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1358 | * @r: struct snd_ratnums constriants |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1359 | * |
| 1360 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1362 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | unsigned int cond, |
| 1364 | snd_pcm_hw_param_t var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1365 | const struct snd_pcm_hw_constraint_ratnums *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | { |
| 1367 | return snd_pcm_hw_rule_add(runtime, cond, var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1368 | snd_pcm_hw_rule_ratnums, (void *)r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | var, -1); |
| 1370 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1371 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
| 1372 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1373 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
| 1374 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | { |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1376 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | unsigned int num = 0, den = 0; |
| 1378 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), |
| 1379 | r->nrats, r->rats, &num, &den); |
| 1380 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { |
| 1381 | params->rate_num = num; |
| 1382 | params->rate_den = den; |
| 1383 | } |
| 1384 | return err; |
| 1385 | } |
| 1386 | |
| 1387 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1388 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1389 | * @runtime: PCM runtime instance |
| 1390 | * @cond: condition bits |
| 1391 | * @var: hw_params variable to apply the ratdens constraint |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1392 | * @r: struct snd_ratdens constriants |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1393 | * |
| 1394 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1396 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | unsigned int cond, |
| 1398 | snd_pcm_hw_param_t var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1399 | const struct snd_pcm_hw_constraint_ratdens *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | { |
| 1401 | return snd_pcm_hw_rule_add(runtime, cond, var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1402 | snd_pcm_hw_rule_ratdens, (void *)r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | var, -1); |
| 1404 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1405 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
| 1406 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1407 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
| 1408 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | { |
| 1410 | unsigned int l = (unsigned long) rule->private; |
| 1411 | int width = l & 0xffff; |
| 1412 | unsigned int msbits = l >> 16; |
Takashi Sakamoto | b55f9fd | 2017-05-17 08:48:20 +0900 | [diff] [blame] | 1413 | const struct snd_interval *i = |
| 1414 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
Lars-Peter Clausen | 8ef9df5 | 2014-12-29 18:43:37 +0100 | [diff] [blame] | 1415 | |
| 1416 | if (!snd_interval_single(i)) |
| 1417 | return 0; |
| 1418 | |
| 1419 | if ((snd_interval_value(i) == width) || |
| 1420 | (width == 0 && snd_interval_value(i) > msbits)) |
Lars-Peter Clausen | 19f52fa | 2014-12-29 18:43:36 +0100 | [diff] [blame] | 1421 | params->msbits = min_not_zero(params->msbits, msbits); |
Lars-Peter Clausen | 8ef9df5 | 2014-12-29 18:43:37 +0100 | [diff] [blame] | 1422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | return 0; |
| 1424 | } |
| 1425 | |
| 1426 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1427 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1428 | * @runtime: PCM runtime instance |
| 1429 | * @cond: condition bits |
| 1430 | * @width: sample bits width |
| 1431 | * @msbits: msbits width |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1432 | * |
Lars-Peter Clausen | 8ef9df5 | 2014-12-29 18:43:37 +0100 | [diff] [blame] | 1433 | * This constraint will set the number of most significant bits (msbits) if a |
| 1434 | * sample format with the specified width has been select. If width is set to 0 |
| 1435 | * the msbits will be set for any sample format with a width larger than the |
| 1436 | * specified msbits. |
| 1437 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1438 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1440 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | unsigned int cond, |
| 1442 | unsigned int width, |
| 1443 | unsigned int msbits) |
| 1444 | { |
| 1445 | unsigned long l = (msbits << 16) | width; |
| 1446 | return snd_pcm_hw_rule_add(runtime, cond, -1, |
| 1447 | snd_pcm_hw_rule_msbits, |
| 1448 | (void*) l, |
| 1449 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| 1450 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1451 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
| 1452 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1453 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
| 1454 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | { |
| 1456 | unsigned long step = (unsigned long) rule->private; |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1457 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | } |
| 1459 | |
| 1460 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1461 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1462 | * @runtime: PCM runtime instance |
| 1463 | * @cond: condition bits |
| 1464 | * @var: hw_params variable to apply the step constraint |
| 1465 | * @step: step size |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1466 | * |
| 1467 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1469 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | unsigned int cond, |
| 1471 | snd_pcm_hw_param_t var, |
| 1472 | unsigned long step) |
| 1473 | { |
| 1474 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1475 | snd_pcm_hw_rule_step, (void *) step, |
| 1476 | var, -1); |
| 1477 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1478 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
| 1479 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1480 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | { |
Takashi Iwai | d03af9b | 2020-01-05 15:47:20 +0100 | [diff] [blame] | 1482 | static const unsigned int pow2_sizes[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
| 1484 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, |
| 1485 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, |
| 1486 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 |
| 1487 | }; |
| 1488 | return snd_interval_list(hw_param_interval(params, rule->var), |
| 1489 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); |
| 1490 | } |
| 1491 | |
| 1492 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1493 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1494 | * @runtime: PCM runtime instance |
| 1495 | * @cond: condition bits |
| 1496 | * @var: hw_params variable to apply the power-of-2 constraint |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1497 | * |
| 1498 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1500 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | unsigned int cond, |
| 1502 | snd_pcm_hw_param_t var) |
| 1503 | { |
| 1504 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1505 | snd_pcm_hw_rule_pow2, NULL, |
| 1506 | var, -1); |
| 1507 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1508 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
| 1509 | |
Clemens Ladisch | d5b702a | 2011-09-16 23:03:02 +0200 | [diff] [blame] | 1510 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
| 1511 | struct snd_pcm_hw_rule *rule) |
| 1512 | { |
| 1513 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; |
| 1514 | struct snd_interval *rate; |
| 1515 | |
| 1516 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| 1517 | return snd_interval_list(rate, 1, &base_rate, 0); |
| 1518 | } |
| 1519 | |
| 1520 | /** |
| 1521 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling |
| 1522 | * @runtime: PCM runtime instance |
| 1523 | * @base_rate: the rate at which the hardware does not resample |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1524 | * |
| 1525 | * Return: Zero if successful, or a negative error code on failure. |
Clemens Ladisch | d5b702a | 2011-09-16 23:03:02 +0200 | [diff] [blame] | 1526 | */ |
| 1527 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
| 1528 | unsigned int base_rate) |
| 1529 | { |
| 1530 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, |
| 1531 | SNDRV_PCM_HW_PARAM_RATE, |
| 1532 | snd_pcm_hw_rule_noresample_func, |
| 1533 | (void *)(uintptr_t)base_rate, |
| 1534 | SNDRV_PCM_HW_PARAM_RATE, -1); |
| 1535 | } |
| 1536 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); |
| 1537 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1538 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 1539 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | { |
| 1541 | if (hw_is_mask(var)) { |
| 1542 | snd_mask_any(hw_param_mask(params, var)); |
| 1543 | params->cmask |= 1 << var; |
| 1544 | params->rmask |= 1 << var; |
| 1545 | return; |
| 1546 | } |
| 1547 | if (hw_is_interval(var)) { |
| 1548 | snd_interval_any(hw_param_interval(params, var)); |
| 1549 | params->cmask |= 1 << var; |
| 1550 | params->rmask |= 1 << var; |
| 1551 | return; |
| 1552 | } |
| 1553 | snd_BUG(); |
| 1554 | } |
| 1555 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1556 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | { |
| 1558 | unsigned int k; |
| 1559 | memset(params, 0, sizeof(*params)); |
| 1560 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) |
| 1561 | _snd_pcm_hw_param_any(params, k); |
| 1562 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
| 1563 | _snd_pcm_hw_param_any(params, k); |
| 1564 | params->info = ~0U; |
| 1565 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1566 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | |
| 1568 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1569 | * snd_pcm_hw_param_value - return @params field @var value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1570 | * @params: the hw_params instance |
| 1571 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1572 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1574 | * Return: The value for field @var if it's fixed in configuration space |
| 1575 | * defined by @params. -%EINVAL otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1577 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
| 1578 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | { |
| 1580 | if (hw_is_mask(var)) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1581 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | if (!snd_mask_single(mask)) |
| 1583 | return -EINVAL; |
| 1584 | if (dir) |
| 1585 | *dir = 0; |
| 1586 | return snd_mask_value(mask); |
| 1587 | } |
| 1588 | if (hw_is_interval(var)) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1589 | const struct snd_interval *i = hw_param_interval_c(params, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | if (!snd_interval_single(i)) |
| 1591 | return -EINVAL; |
| 1592 | if (dir) |
| 1593 | *dir = i->openmin; |
| 1594 | return snd_interval_value(i); |
| 1595 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | return -EINVAL; |
| 1597 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1598 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1600 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | snd_pcm_hw_param_t var) |
| 1602 | { |
| 1603 | if (hw_is_mask(var)) { |
| 1604 | snd_mask_none(hw_param_mask(params, var)); |
| 1605 | params->cmask |= 1 << var; |
| 1606 | params->rmask |= 1 << var; |
| 1607 | } else if (hw_is_interval(var)) { |
| 1608 | snd_interval_none(hw_param_interval(params, var)); |
| 1609 | params->cmask |= 1 << var; |
| 1610 | params->rmask |= 1 << var; |
| 1611 | } else { |
| 1612 | snd_BUG(); |
| 1613 | } |
| 1614 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1615 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1617 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 1618 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | { |
| 1620 | int changed; |
| 1621 | if (hw_is_mask(var)) |
| 1622 | changed = snd_mask_refine_first(hw_param_mask(params, var)); |
| 1623 | else if (hw_is_interval(var)) |
| 1624 | changed = snd_interval_refine_first(hw_param_interval(params, var)); |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1625 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | return -EINVAL; |
Takashi Iwai | 7a0a871 | 2018-01-02 11:00:57 +0100 | [diff] [blame] | 1627 | if (changed > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | params->cmask |= 1 << var; |
| 1629 | params->rmask |= 1 << var; |
| 1630 | } |
| 1631 | return changed; |
| 1632 | } |
| 1633 | |
| 1634 | |
| 1635 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1636 | * snd_pcm_hw_param_first - refine config space and return minimum value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1637 | * @pcm: PCM instance |
| 1638 | * @params: the hw_params instance |
| 1639 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1640 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1642 | * Inside configuration space defined by @params remove from @var all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | * values > minimum. Reduce configuration space accordingly. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1644 | * |
| 1645 | * Return: The minimum, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1647 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
| 1648 | struct snd_pcm_hw_params *params, |
| 1649 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | { |
| 1651 | int changed = _snd_pcm_hw_param_first(params, var); |
| 1652 | if (changed < 0) |
| 1653 | return changed; |
| 1654 | if (params->rmask) { |
| 1655 | int err = snd_pcm_hw_refine(pcm, params); |
Takashi Iwai | fe08f34 | 2018-01-01 09:50:50 +0100 | [diff] [blame] | 1656 | if (err < 0) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1657 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | } |
| 1659 | return snd_pcm_hw_param_value(params, var, dir); |
| 1660 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1661 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
| 1662 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1663 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 1664 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | { |
| 1666 | int changed; |
| 1667 | if (hw_is_mask(var)) |
| 1668 | changed = snd_mask_refine_last(hw_param_mask(params, var)); |
| 1669 | else if (hw_is_interval(var)) |
| 1670 | changed = snd_interval_refine_last(hw_param_interval(params, var)); |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1671 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | return -EINVAL; |
Takashi Iwai | 7a0a871 | 2018-01-02 11:00:57 +0100 | [diff] [blame] | 1673 | if (changed > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | params->cmask |= 1 << var; |
| 1675 | params->rmask |= 1 << var; |
| 1676 | } |
| 1677 | return changed; |
| 1678 | } |
| 1679 | |
| 1680 | |
| 1681 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1682 | * snd_pcm_hw_param_last - refine config space and return maximum value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1683 | * @pcm: PCM instance |
| 1684 | * @params: the hw_params instance |
| 1685 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1686 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1688 | * Inside configuration space defined by @params remove from @var all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | * values < maximum. Reduce configuration space accordingly. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1690 | * |
| 1691 | * Return: The maximum, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1693 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
| 1694 | struct snd_pcm_hw_params *params, |
| 1695 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | { |
| 1697 | int changed = _snd_pcm_hw_param_last(params, var); |
| 1698 | if (changed < 0) |
| 1699 | return changed; |
| 1700 | if (params->rmask) { |
| 1701 | int err = snd_pcm_hw_refine(pcm, params); |
Takashi Iwai | fe08f34 | 2018-01-01 09:50:50 +0100 | [diff] [blame] | 1702 | if (err < 0) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1703 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | } |
| 1705 | return snd_pcm_hw_param_value(params, var, dir); |
| 1706 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1707 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1709 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | void *arg) |
| 1711 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1712 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | unsigned long flags; |
| 1714 | snd_pcm_stream_lock_irqsave(substream, flags); |
| 1715 | if (snd_pcm_running(substream) && |
| 1716 | snd_pcm_update_hw_ptr(substream) >= 0) |
| 1717 | runtime->status->hw_ptr %= runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 1718 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | runtime->status->hw_ptr = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 1720 | runtime->hw_ptr_wrap = 0; |
| 1721 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
| 1723 | return 0; |
| 1724 | } |
| 1725 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1726 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | void *arg) |
| 1728 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1729 | struct snd_pcm_channel_info *info = arg; |
| 1730 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | int width; |
| 1732 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { |
| 1733 | info->offset = -1; |
| 1734 | return 0; |
| 1735 | } |
| 1736 | width = snd_pcm_format_physical_width(runtime->format); |
| 1737 | if (width < 0) |
| 1738 | return width; |
| 1739 | info->offset = 0; |
| 1740 | switch (runtime->access) { |
| 1741 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: |
| 1742 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: |
| 1743 | info->first = info->channel * width; |
| 1744 | info->step = runtime->channels * width; |
| 1745 | break; |
| 1746 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: |
| 1747 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: |
| 1748 | { |
| 1749 | size_t size = runtime->dma_bytes / runtime->channels; |
| 1750 | info->first = info->channel * size * 8; |
| 1751 | info->step = width; |
| 1752 | break; |
| 1753 | } |
| 1754 | default: |
| 1755 | snd_BUG(); |
| 1756 | break; |
| 1757 | } |
| 1758 | return 0; |
| 1759 | } |
| 1760 | |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1761 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
| 1762 | void *arg) |
| 1763 | { |
| 1764 | struct snd_pcm_hw_params *params = arg; |
| 1765 | snd_pcm_format_t format; |
Clemens Ladisch | a9960e6 | 2014-09-21 22:50:57 +0200 | [diff] [blame] | 1766 | int channels; |
| 1767 | ssize_t frame_size; |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1768 | |
| 1769 | params->fifo_size = substream->runtime->hw.fifo_size; |
| 1770 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { |
| 1771 | format = params_format(params); |
| 1772 | channels = params_channels(params); |
Clemens Ladisch | a9960e6 | 2014-09-21 22:50:57 +0200 | [diff] [blame] | 1773 | frame_size = snd_pcm_format_size(format, channels); |
| 1774 | if (frame_size > 0) |
Zubin Mithra | f3eef46 | 2021-08-27 08:37:35 -0700 | [diff] [blame] | 1775 | params->fifo_size /= frame_size; |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1776 | } |
| 1777 | return 0; |
| 1778 | } |
| 1779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | /** |
| 1781 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback |
| 1782 | * @substream: the pcm substream instance |
| 1783 | * @cmd: ioctl command |
| 1784 | * @arg: ioctl argument |
| 1785 | * |
| 1786 | * Processes the generic ioctl commands for PCM. |
| 1787 | * Can be passed as the ioctl callback for PCM ops. |
| 1788 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1789 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1791 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | unsigned int cmd, void *arg) |
| 1793 | { |
| 1794 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | case SNDRV_PCM_IOCTL1_RESET: |
| 1796 | return snd_pcm_lib_ioctl_reset(substream, arg); |
| 1797 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: |
| 1798 | return snd_pcm_lib_ioctl_channel_info(substream, arg); |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1799 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
| 1800 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | } |
| 1802 | return -ENXIO; |
| 1803 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1804 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
| 1805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | /** |
Takashi Sakamoto | 47271b1 | 2021-06-10 12:17:31 +0900 | [diff] [blame] | 1807 | * snd_pcm_period_elapsed_under_stream_lock() - update the status of runtime for the next period |
| 1808 | * under acquired lock of PCM substream. |
| 1809 | * @substream: the instance of pcm substream. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | * |
Takashi Sakamoto | 47271b1 | 2021-06-10 12:17:31 +0900 | [diff] [blame] | 1811 | * This function is called when the batch of audio data frames as the same size as the period of |
| 1812 | * buffer is already processed in audio data transmission. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | * |
Takashi Sakamoto | 47271b1 | 2021-06-10 12:17:31 +0900 | [diff] [blame] | 1814 | * The call of function updates the status of runtime with the latest position of audio data |
| 1815 | * transmission, checks overrun and underrun over buffer, awaken user processes from waiting for |
| 1816 | * available audio data frames, sampling audio timestamp, and performs stop or drain the PCM |
| 1817 | * substream according to configured threshold. |
| 1818 | * |
| 1819 | * The function is intended to use for the case that PCM driver operates audio data frames under |
| 1820 | * acquired lock of PCM substream; e.g. in callback of any operation of &snd_pcm_ops in process |
| 1821 | * context. In any interrupt context, it's preferrable to use ``snd_pcm_period_elapsed()`` instead |
| 1822 | * since lock of PCM substream should be acquired in advance. |
| 1823 | * |
| 1824 | * Developer should pay enough attention that some callbacks in &snd_pcm_ops are done by the call of |
| 1825 | * function: |
| 1826 | * |
| 1827 | * - .pointer - to retrieve current position of audio data transmission by frame count or XRUN state. |
| 1828 | * - .trigger - with SNDRV_PCM_TRIGGER_STOP at XRUN or DRAINING state. |
| 1829 | * - .get_time_info - to retrieve audio time stamp if needed. |
| 1830 | * |
| 1831 | * Even if more than one periods have elapsed since the last call, you have to call this only once. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | */ |
Takashi Sakamoto | 47271b1 | 2021-06-10 12:17:31 +0900 | [diff] [blame] | 1833 | void snd_pcm_period_elapsed_under_stream_lock(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1835 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | |
paulhsia | f5cdc9d | 2019-11-13 01:17:14 +0800 | [diff] [blame] | 1837 | if (PCM_RUNTIME_CHECK(substream)) |
Takashi Sakamoto | 47271b1 | 2021-06-10 12:17:31 +0900 | [diff] [blame] | 1838 | return; |
paulhsia | f5cdc9d | 2019-11-13 01:17:14 +0800 | [diff] [blame] | 1839 | runtime = substream->runtime; |
| 1840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | if (!snd_pcm_running(substream) || |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 1842 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | goto _end; |
| 1844 | |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1845 | #ifdef CONFIG_SND_PCM_TIMER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | if (substream->timer_running) |
| 1847 | snd_timer_interrupt(substream->timer, 1); |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1848 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | _end: |
Takashi Iwai | 96b0970 | 2022-07-28 14:59:44 +0200 | [diff] [blame] | 1850 | snd_kill_fasync(runtime->fasync, SIGIO, POLL_IN); |
Takashi Sakamoto | 47271b1 | 2021-06-10 12:17:31 +0900 | [diff] [blame] | 1851 | } |
| 1852 | EXPORT_SYMBOL(snd_pcm_period_elapsed_under_stream_lock); |
| 1853 | |
| 1854 | /** |
| 1855 | * snd_pcm_period_elapsed() - update the status of runtime for the next period by acquiring lock of |
| 1856 | * PCM substream. |
| 1857 | * @substream: the instance of PCM substream. |
| 1858 | * |
| 1859 | * This function is mostly similar to ``snd_pcm_period_elapsed_under_stream_lock()`` except for |
| 1860 | * acquiring lock of PCM substream voluntarily. |
| 1861 | * |
| 1862 | * It's typically called by any type of IRQ handler when hardware IRQ occurs to notify event that |
| 1863 | * the batch of audio data frames as the same size as the period of buffer is already processed in |
| 1864 | * audio data transmission. |
| 1865 | */ |
| 1866 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
| 1867 | { |
| 1868 | unsigned long flags; |
| 1869 | |
| 1870 | if (snd_BUG_ON(!substream)) |
| 1871 | return; |
| 1872 | |
| 1873 | snd_pcm_stream_lock_irqsave(substream, flags); |
| 1874 | snd_pcm_period_elapsed_under_stream_lock(substream); |
Takashi Iwai | 3aa02cb | 2016-04-14 18:02:37 +0200 | [diff] [blame] | 1875 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1877 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
| 1878 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1879 | /* |
| 1880 | * Wait until avail_min data becomes available |
| 1881 | * Returns a negative error code if any error occurs during operation. |
| 1882 | * The available space is stored on availp. When err = 0 and avail = 0 |
| 1883 | * on the capture stream, it indicates the stream is in DRAINING state. |
| 1884 | */ |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 1885 | static int wait_for_avail(struct snd_pcm_substream *substream, |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1886 | snd_pcm_uframes_t *availp) |
| 1887 | { |
| 1888 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 1889 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
Ingo Molnar | ac6424b | 2017-06-20 12:06:13 +0200 | [diff] [blame] | 1890 | wait_queue_entry_t wait; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1891 | int err = 0; |
| 1892 | snd_pcm_uframes_t avail = 0; |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1893 | long wait_time, tout; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1894 | |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1895 | init_waitqueue_entry(&wait, current); |
| 1896 | set_current_state(TASK_INTERRUPTIBLE); |
| 1897 | add_wait_queue(&runtime->tsleep, &wait); |
| 1898 | |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1899 | if (runtime->no_period_wakeup) |
| 1900 | wait_time = MAX_SCHEDULE_TIMEOUT; |
| 1901 | else { |
Liam Girdwood | d64c5cf | 2018-07-06 13:50:36 +0100 | [diff] [blame] | 1902 | /* use wait time from substream if available */ |
| 1903 | if (substream->wait_time) { |
| 1904 | wait_time = substream->wait_time; |
| 1905 | } else { |
Oswald Buddenhagen | 3ed2b54 | 2023-04-05 22:12:19 +0200 | [diff] [blame] | 1906 | wait_time = 100; |
Liam Girdwood | d64c5cf | 2018-07-06 13:50:36 +0100 | [diff] [blame] | 1907 | |
| 1908 | if (runtime->rate) { |
Oswald Buddenhagen | 3ed2b54 | 2023-04-05 22:12:19 +0200 | [diff] [blame] | 1909 | long t = runtime->buffer_size * 1100 / runtime->rate; |
Liam Girdwood | d64c5cf | 2018-07-06 13:50:36 +0100 | [diff] [blame] | 1910 | wait_time = max(t, wait_time); |
| 1911 | } |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1912 | } |
Oswald Buddenhagen | 3ed2b54 | 2023-04-05 22:12:19 +0200 | [diff] [blame] | 1913 | wait_time = msecs_to_jiffies(wait_time); |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1914 | } |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1915 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1916 | for (;;) { |
| 1917 | if (signal_pending(current)) { |
| 1918 | err = -ERESTARTSYS; |
| 1919 | break; |
| 1920 | } |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1921 | |
| 1922 | /* |
| 1923 | * We need to check if space became available already |
| 1924 | * (and thus the wakeup happened already) first to close |
| 1925 | * the race of space already having become available. |
| 1926 | * This check must happen after been added to the waitqueue |
| 1927 | * and having current state be INTERRUPTIBLE. |
| 1928 | */ |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 1929 | avail = snd_pcm_avail(substream); |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1930 | if (avail >= runtime->twake) |
| 1931 | break; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1932 | snd_pcm_stream_unlock_irq(substream); |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1933 | |
| 1934 | tout = schedule_timeout(wait_time); |
| 1935 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1936 | snd_pcm_stream_lock_irq(substream); |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1937 | set_current_state(TASK_INTERRUPTIBLE); |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 1938 | switch (runtime->state) { |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1939 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1940 | err = -ESTRPIPE; |
| 1941 | goto _endloop; |
| 1942 | case SNDRV_PCM_STATE_XRUN: |
| 1943 | err = -EPIPE; |
| 1944 | goto _endloop; |
| 1945 | case SNDRV_PCM_STATE_DRAINING: |
| 1946 | if (is_playback) |
| 1947 | err = -EPIPE; |
| 1948 | else |
| 1949 | avail = 0; /* indicate draining */ |
| 1950 | goto _endloop; |
| 1951 | case SNDRV_PCM_STATE_OPEN: |
| 1952 | case SNDRV_PCM_STATE_SETUP: |
| 1953 | case SNDRV_PCM_STATE_DISCONNECTED: |
| 1954 | err = -EBADFD; |
| 1955 | goto _endloop; |
JongHo Kim | ed697e1 | 2013-12-17 23:02:24 +0900 | [diff] [blame] | 1956 | case SNDRV_PCM_STATE_PAUSED: |
| 1957 | continue; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1958 | } |
| 1959 | if (!tout) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 1960 | pcm_dbg(substream->pcm, |
Oswald Buddenhagen | 3ed2b54 | 2023-04-05 22:12:19 +0200 | [diff] [blame] | 1961 | "%s timeout (DMA or IRQ trouble?)\n", |
| 1962 | is_playback ? "playback write" : "capture read"); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1963 | err = -EIO; |
| 1964 | break; |
| 1965 | } |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1966 | } |
| 1967 | _endloop: |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1968 | set_current_state(TASK_RUNNING); |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1969 | remove_wait_queue(&runtime->tsleep, &wait); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1970 | *availp = avail; |
| 1971 | return err; |
| 1972 | } |
| 1973 | |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 1974 | typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream, |
| 1975 | int channel, unsigned long hwoff, |
| 1976 | void *buf, unsigned long bytes); |
Takashi Iwai | bdc4acf | 2017-05-24 17:59:17 +0200 | [diff] [blame] | 1977 | |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 1978 | typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *, |
| 1979 | snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f); |
| 1980 | |
| 1981 | /* calculate the target DMA-buffer position to be written/read */ |
| 1982 | static void *get_dma_ptr(struct snd_pcm_runtime *runtime, |
| 1983 | int channel, unsigned long hwoff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | { |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 1985 | return runtime->dma_area + hwoff + |
| 1986 | channel * (runtime->dma_bytes / runtime->channels); |
| 1987 | } |
| 1988 | |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 1989 | /* default copy_user ops for write; used for both interleaved and non- modes */ |
| 1990 | static int default_write_copy(struct snd_pcm_substream *substream, |
| 1991 | int channel, unsigned long hwoff, |
| 1992 | void *buf, unsigned long bytes) |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 1993 | { |
| 1994 | if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff), |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 1995 | (void __user *)buf, bytes)) |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 1996 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | return 0; |
| 1998 | } |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 1999 | |
Takashi Iwai | 6854121 | 2017-05-24 18:23:20 +0200 | [diff] [blame] | 2000 | /* default copy_kernel ops for write */ |
| 2001 | static int default_write_copy_kernel(struct snd_pcm_substream *substream, |
| 2002 | int channel, unsigned long hwoff, |
| 2003 | void *buf, unsigned long bytes) |
| 2004 | { |
| 2005 | memcpy(get_dma_ptr(substream->runtime, channel, hwoff), buf, bytes); |
| 2006 | return 0; |
| 2007 | } |
| 2008 | |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2009 | /* fill silence instead of copy data; called as a transfer helper |
| 2010 | * from __snd_pcm_lib_write() or directly from noninterleaved_copy() when |
| 2011 | * a NULL buffer is passed |
| 2012 | */ |
| 2013 | static int fill_silence(struct snd_pcm_substream *substream, int channel, |
| 2014 | unsigned long hwoff, void *buf, unsigned long bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | { |
| 2016 | struct snd_pcm_runtime *runtime = substream->runtime; |
Takashi Iwai | bdc4acf | 2017-05-24 17:59:17 +0200 | [diff] [blame] | 2017 | |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2018 | if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) |
| 2019 | return 0; |
| 2020 | if (substream->ops->fill_silence) |
| 2021 | return substream->ops->fill_silence(substream, channel, |
| 2022 | hwoff, bytes); |
| 2023 | |
| 2024 | snd_pcm_format_set_silence(runtime->format, |
| 2025 | get_dma_ptr(runtime, channel, hwoff), |
| 2026 | bytes_to_samples(runtime, bytes)); |
| 2027 | return 0; |
| 2028 | } |
| 2029 | |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2030 | /* default copy_user ops for read; used for both interleaved and non- modes */ |
| 2031 | static int default_read_copy(struct snd_pcm_substream *substream, |
| 2032 | int channel, unsigned long hwoff, |
| 2033 | void *buf, unsigned long bytes) |
| 2034 | { |
| 2035 | if (copy_to_user((void __user *)buf, |
| 2036 | get_dma_ptr(substream->runtime, channel, hwoff), |
| 2037 | bytes)) |
| 2038 | return -EFAULT; |
| 2039 | return 0; |
| 2040 | } |
| 2041 | |
Takashi Iwai | 6854121 | 2017-05-24 18:23:20 +0200 | [diff] [blame] | 2042 | /* default copy_kernel ops for read */ |
| 2043 | static int default_read_copy_kernel(struct snd_pcm_substream *substream, |
| 2044 | int channel, unsigned long hwoff, |
| 2045 | void *buf, unsigned long bytes) |
| 2046 | { |
| 2047 | memcpy(buf, get_dma_ptr(substream->runtime, channel, hwoff), bytes); |
| 2048 | return 0; |
| 2049 | } |
| 2050 | |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2051 | /* call transfer function with the converted pointers and sizes; |
| 2052 | * for interleaved mode, it's one shot for all samples |
| 2053 | */ |
| 2054 | static int interleaved_copy(struct snd_pcm_substream *substream, |
| 2055 | snd_pcm_uframes_t hwoff, void *data, |
| 2056 | snd_pcm_uframes_t off, |
| 2057 | snd_pcm_uframes_t frames, |
| 2058 | pcm_transfer_f transfer) |
| 2059 | { |
| 2060 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 2061 | |
| 2062 | /* convert to bytes */ |
| 2063 | hwoff = frames_to_bytes(runtime, hwoff); |
| 2064 | off = frames_to_bytes(runtime, off); |
| 2065 | frames = frames_to_bytes(runtime, frames); |
| 2066 | return transfer(substream, 0, hwoff, data + off, frames); |
| 2067 | } |
| 2068 | |
| 2069 | /* call transfer function with the converted pointers and sizes for each |
| 2070 | * non-interleaved channel; when buffer is NULL, silencing instead of copying |
| 2071 | */ |
| 2072 | static int noninterleaved_copy(struct snd_pcm_substream *substream, |
| 2073 | snd_pcm_uframes_t hwoff, void *data, |
| 2074 | snd_pcm_uframes_t off, |
| 2075 | snd_pcm_uframes_t frames, |
| 2076 | pcm_transfer_f transfer) |
| 2077 | { |
| 2078 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 2079 | int channels = runtime->channels; |
| 2080 | void **bufs = data; |
| 2081 | int c, err; |
| 2082 | |
| 2083 | /* convert to bytes; note that it's not frames_to_bytes() here. |
| 2084 | * in non-interleaved mode, we copy for each channel, thus |
| 2085 | * each copy is n_samples bytes x channels = whole frames. |
| 2086 | */ |
| 2087 | off = samples_to_bytes(runtime, off); |
| 2088 | frames = samples_to_bytes(runtime, frames); |
| 2089 | hwoff = samples_to_bytes(runtime, hwoff); |
| 2090 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2091 | if (!data || !*bufs) |
| 2092 | err = fill_silence(substream, c, hwoff, NULL, frames); |
| 2093 | else |
| 2094 | err = transfer(substream, c, hwoff, *bufs + off, |
| 2095 | frames); |
| 2096 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | } |
| 2099 | return 0; |
| 2100 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | |
Takashi Iwai | a9cd29e | 2017-05-24 18:18:15 +0200 | [diff] [blame] | 2102 | /* fill silence on the given buffer position; |
| 2103 | * called from snd_pcm_playback_silence() |
| 2104 | */ |
| 2105 | static int fill_silence_frames(struct snd_pcm_substream *substream, |
| 2106 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | { |
Takashi Iwai | a9cd29e | 2017-05-24 18:18:15 +0200 | [diff] [blame] | 2108 | if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || |
| 2109 | substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) |
| 2110 | return interleaved_copy(substream, off, NULL, 0, frames, |
| 2111 | fill_silence); |
| 2112 | else |
| 2113 | return noninterleaved_copy(substream, off, NULL, 0, frames, |
| 2114 | fill_silence); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | } |
| 2116 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2117 | /* sanity-check for read/write methods */ |
| 2118 | static int pcm_sanity_check(struct snd_pcm_substream *substream) |
| 2119 | { |
| 2120 | struct snd_pcm_runtime *runtime; |
| 2121 | if (PCM_RUNTIME_CHECK(substream)) |
| 2122 | return -ENXIO; |
| 2123 | runtime = substream->runtime; |
Takashi Iwai | bdc4acf | 2017-05-24 17:59:17 +0200 | [diff] [blame] | 2124 | if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area)) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2125 | return -EINVAL; |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 2126 | if (runtime->state == SNDRV_PCM_STATE_OPEN) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2127 | return -EBADFD; |
| 2128 | return 0; |
| 2129 | } |
| 2130 | |
Takashi Iwai | 6ba6392 | 2017-05-24 17:51:30 +0200 | [diff] [blame] | 2131 | static int pcm_accessible_state(struct snd_pcm_runtime *runtime) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | { |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 2133 | switch (runtime->state) { |
Takashi Iwai | 6ba6392 | 2017-05-24 17:51:30 +0200 | [diff] [blame] | 2134 | case SNDRV_PCM_STATE_PREPARED: |
| 2135 | case SNDRV_PCM_STATE_RUNNING: |
| 2136 | case SNDRV_PCM_STATE_PAUSED: |
| 2137 | return 0; |
| 2138 | case SNDRV_PCM_STATE_XRUN: |
| 2139 | return -EPIPE; |
| 2140 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2141 | return -ESTRPIPE; |
| 2142 | default: |
| 2143 | return -EBADFD; |
| 2144 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | } |
| 2146 | |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2147 | /* update to the given appl_ptr and call ack callback if needed; |
| 2148 | * when an error is returned, take back to the original value |
| 2149 | */ |
| 2150 | int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream, |
| 2151 | snd_pcm_uframes_t appl_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2153 | struct snd_pcm_runtime *runtime = substream->runtime; |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2154 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; |
Pierre-Louis Bossart | b456abe | 2021-11-19 17:08:50 -0600 | [diff] [blame] | 2155 | snd_pcm_sframes_t diff; |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2156 | int ret; |
| 2157 | |
Takashi Iwai | f8ff2f2 | 2017-06-13 15:57:28 +0200 | [diff] [blame] | 2158 | if (old_appl_ptr == appl_ptr) |
| 2159 | return 0; |
| 2160 | |
Pierre-Louis Bossart | 0e888a7 | 2021-11-19 17:08:49 -0600 | [diff] [blame] | 2161 | if (appl_ptr >= runtime->boundary) |
| 2162 | return -EINVAL; |
Pierre-Louis Bossart | b456abe | 2021-11-19 17:08:50 -0600 | [diff] [blame] | 2163 | /* |
| 2164 | * check if a rewind is requested by the application |
| 2165 | */ |
| 2166 | if (substream->runtime->info & SNDRV_PCM_INFO_NO_REWINDS) { |
| 2167 | diff = appl_ptr - old_appl_ptr; |
| 2168 | if (diff >= 0) { |
| 2169 | if (diff > runtime->buffer_size) |
| 2170 | return -EINVAL; |
| 2171 | } else { |
| 2172 | if (runtime->boundary + diff > runtime->buffer_size) |
| 2173 | return -EINVAL; |
| 2174 | } |
| 2175 | } |
Pierre-Louis Bossart | 0e888a7 | 2021-11-19 17:08:49 -0600 | [diff] [blame] | 2176 | |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2177 | runtime->control->appl_ptr = appl_ptr; |
| 2178 | if (substream->ops->ack) { |
| 2179 | ret = substream->ops->ack(substream); |
| 2180 | if (ret < 0) { |
| 2181 | runtime->control->appl_ptr = old_appl_ptr; |
Takashi Iwai | 8c721c5 | 2023-03-20 15:28:38 +0100 | [diff] [blame] | 2182 | if (ret == -EPIPE) |
| 2183 | __snd_pcm_xrun(substream); |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2184 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | } |
| 2186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | |
Takashi Sakamoto | fccf538 | 2017-06-12 09:41:45 +0900 | [diff] [blame] | 2188 | trace_applptr(substream, old_appl_ptr, appl_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | return 0; |
| 2191 | } |
| 2192 | |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2193 | /* the common loop for read/write data */ |
| 2194 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, |
| 2195 | void *data, bool interleaved, |
Takashi Iwai | 6854121 | 2017-05-24 18:23:20 +0200 | [diff] [blame] | 2196 | snd_pcm_uframes_t size, bool in_kernel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2198 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | snd_pcm_uframes_t xfer = 0; |
| 2200 | snd_pcm_uframes_t offset = 0; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2201 | snd_pcm_uframes_t avail; |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2202 | pcm_copy_f writer; |
| 2203 | pcm_transfer_f transfer; |
Takashi Iwai | c48f12ee | 2017-05-21 09:35:21 +0200 | [diff] [blame] | 2204 | bool nonblock; |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2205 | bool is_playback; |
Takashi Iwai | c48f12ee | 2017-05-21 09:35:21 +0200 | [diff] [blame] | 2206 | int err; |
| 2207 | |
| 2208 | err = pcm_sanity_check(substream); |
| 2209 | if (err < 0) |
| 2210 | return err; |
Takashi Iwai | c48f12ee | 2017-05-21 09:35:21 +0200 | [diff] [blame] | 2211 | |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2212 | is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
Takashi Iwai | c48f12ee | 2017-05-21 09:35:21 +0200 | [diff] [blame] | 2213 | if (interleaved) { |
| 2214 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && |
| 2215 | runtime->channels > 1) |
| 2216 | return -EINVAL; |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2217 | writer = interleaved_copy; |
Takashi Iwai | c48f12ee | 2017-05-21 09:35:21 +0200 | [diff] [blame] | 2218 | } else { |
| 2219 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
| 2220 | return -EINVAL; |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2221 | writer = noninterleaved_copy; |
| 2222 | } |
| 2223 | |
| 2224 | if (!data) { |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2225 | if (is_playback) |
| 2226 | transfer = fill_silence; |
| 2227 | else |
| 2228 | return -EINVAL; |
Takashi Iwai | 6854121 | 2017-05-24 18:23:20 +0200 | [diff] [blame] | 2229 | } else if (in_kernel) { |
| 2230 | if (substream->ops->copy_kernel) |
| 2231 | transfer = substream->ops->copy_kernel; |
| 2232 | else |
| 2233 | transfer = is_playback ? |
| 2234 | default_write_copy_kernel : default_read_copy_kernel; |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2235 | } else { |
| 2236 | if (substream->ops->copy_user) |
| 2237 | transfer = (pcm_transfer_f)substream->ops->copy_user; |
| 2238 | else |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2239 | transfer = is_playback ? |
| 2240 | default_write_copy : default_read_copy; |
Takashi Iwai | c48f12ee | 2017-05-21 09:35:21 +0200 | [diff] [blame] | 2241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | |
| 2243 | if (size == 0) |
| 2244 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | |
Takashi Iwai | c48f12ee | 2017-05-21 09:35:21 +0200 | [diff] [blame] | 2246 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
| 2247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2248 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | 6ba6392 | 2017-05-24 17:51:30 +0200 | [diff] [blame] | 2249 | err = pcm_accessible_state(runtime); |
| 2250 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | |
Ricardo Biehl Pasquali | 64b6acf | 2018-09-07 16:58:54 -0300 | [diff] [blame] | 2253 | runtime->twake = runtime->control->avail_min ? : 1; |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 2254 | if (runtime->state == SNDRV_PCM_STATE_RUNNING) |
Ricardo Biehl Pasquali | 64b6acf | 2018-09-07 16:58:54 -0300 | [diff] [blame] | 2255 | snd_pcm_update_hw_ptr(substream); |
| 2256 | |
Ricardo Biehl Pasquali | 932a815 | 2019-02-13 00:57:51 -0200 | [diff] [blame] | 2257 | /* |
| 2258 | * If size < start_threshold, wait indefinitely. Another |
| 2259 | * thread may start capture |
| 2260 | */ |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2261 | if (!is_playback && |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 2262 | runtime->state == SNDRV_PCM_STATE_PREPARED && |
Takashi Iwai | 00a399c | 2019-02-06 07:30:44 +0100 | [diff] [blame] | 2263 | size >= runtime->start_threshold) { |
| 2264 | err = snd_pcm_start(substream); |
| 2265 | if (err < 0) |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2266 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | } |
| 2268 | |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 2269 | avail = snd_pcm_avail(substream); |
Ricardo Biehl Pasquali | 64b6acf | 2018-09-07 16:58:54 -0300 | [diff] [blame] | 2270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | while (size > 0) { |
| 2272 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | snd_pcm_uframes_t cont; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2274 | if (!avail) { |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2275 | if (!is_playback && |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 2276 | runtime->state == SNDRV_PCM_STATE_DRAINING) { |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2277 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | goto _end_unlock; |
| 2279 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | if (nonblock) { |
| 2281 | err = -EAGAIN; |
| 2282 | goto _end_unlock; |
| 2283 | } |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 2284 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
| 2285 | runtime->control->avail_min ? : 1); |
| 2286 | err = wait_for_avail(substream, &avail); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2287 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | goto _end_unlock; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2289 | if (!avail) |
| 2290 | continue; /* draining */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | frames = size > avail ? avail : size; |
Takashi Iwai | aa30db0 | 2017-06-16 22:29:55 +0200 | [diff] [blame] | 2293 | appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
| 2294 | appl_ofs = appl_ptr % runtime->buffer_size; |
| 2295 | cont = runtime->buffer_size - appl_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | if (frames > cont) |
| 2297 | frames = cont; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2298 | if (snd_BUG_ON(!frames)) { |
Takashi Iwai | 315d9f1 | 2019-01-25 17:31:59 +0100 | [diff] [blame] | 2299 | err = -EINVAL; |
| 2300 | goto _end_unlock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2301 | } |
Takashi Iwai | bc55cfd | 2022-03-30 14:09:03 +0200 | [diff] [blame] | 2302 | if (!atomic_inc_unless_negative(&runtime->buffer_accessing)) { |
| 2303 | err = -EBUSY; |
| 2304 | goto _end_unlock; |
| 2305 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | snd_pcm_stream_unlock_irq(substream); |
Takashi Iwai | a25684a | 2021-10-17 09:48:57 +0200 | [diff] [blame] | 2307 | if (!is_playback) |
| 2308 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_CPU); |
Takashi Iwai | 9f60063 | 2017-05-24 18:15:26 +0200 | [diff] [blame] | 2309 | err = writer(substream, appl_ofs, data, offset, frames, |
| 2310 | transfer); |
Takashi Iwai | a25684a | 2021-10-17 09:48:57 +0200 | [diff] [blame] | 2311 | if (is_playback) |
| 2312 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | bc55cfd | 2022-03-30 14:09:03 +0200 | [diff] [blame] | 2314 | atomic_dec(&runtime->buffer_accessing); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2315 | if (err < 0) |
| 2316 | goto _end_unlock; |
Takashi Iwai | 6ba6392 | 2017-05-24 17:51:30 +0200 | [diff] [blame] | 2317 | err = pcm_accessible_state(runtime); |
| 2318 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | appl_ptr += frames; |
| 2321 | if (appl_ptr >= runtime->boundary) |
| 2322 | appl_ptr -= runtime->boundary; |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2323 | err = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
| 2324 | if (err < 0) |
| 2325 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | |
| 2327 | offset += frames; |
| 2328 | size -= frames; |
| 2329 | xfer += frames; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2330 | avail -= frames; |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2331 | if (is_playback && |
Takashi Iwai | f0061c1 | 2022-09-26 15:55:48 +0200 | [diff] [blame] | 2332 | runtime->state == SNDRV_PCM_STATE_PREPARED && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2333 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { |
| 2334 | err = snd_pcm_start(substream); |
| 2335 | if (err < 0) |
| 2336 | goto _end_unlock; |
| 2337 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | } |
| 2339 | _end_unlock: |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 2340 | runtime->twake = 0; |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2341 | if (xfer > 0 && err >= 0) |
| 2342 | snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
| 2345 | } |
Takashi Iwai | 5c7264c | 2017-05-24 22:36:23 +0200 | [diff] [blame] | 2346 | EXPORT_SYMBOL(__snd_pcm_lib_xfer); |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2347 | |
| 2348 | /* |
| 2349 | * standard channel mapping helpers |
| 2350 | */ |
| 2351 | |
| 2352 | /* default channel maps for multi-channel playbacks, up to 8 channels */ |
| 2353 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { |
| 2354 | { .channels = 1, |
Takashi Iwai | 5efbc26 | 2012-09-13 14:48:46 +0200 | [diff] [blame] | 2355 | .map = { SNDRV_CHMAP_MONO } }, |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2356 | { .channels = 2, |
| 2357 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, |
| 2358 | { .channels = 4, |
| 2359 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2360 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2361 | { .channels = 6, |
| 2362 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2363 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2364 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, |
| 2365 | { .channels = 8, |
| 2366 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2367 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2368 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2369 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, |
| 2370 | { } |
| 2371 | }; |
| 2372 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); |
| 2373 | |
| 2374 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ |
| 2375 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { |
| 2376 | { .channels = 1, |
Takashi Iwai | 5efbc26 | 2012-09-13 14:48:46 +0200 | [diff] [blame] | 2377 | .map = { SNDRV_CHMAP_MONO } }, |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2378 | { .channels = 2, |
| 2379 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, |
| 2380 | { .channels = 4, |
| 2381 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2382 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2383 | { .channels = 6, |
| 2384 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2385 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2386 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2387 | { .channels = 8, |
| 2388 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2389 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2390 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2391 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, |
| 2392 | { } |
| 2393 | }; |
| 2394 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); |
| 2395 | |
| 2396 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) |
| 2397 | { |
| 2398 | if (ch > info->max_channels) |
| 2399 | return false; |
| 2400 | return !info->channel_mask || (info->channel_mask & (1U << ch)); |
| 2401 | } |
| 2402 | |
| 2403 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, |
| 2404 | struct snd_ctl_elem_info *uinfo) |
| 2405 | { |
| 2406 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2407 | |
| 2408 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2409 | uinfo->count = info->max_channels; |
| 2410 | uinfo->value.integer.min = 0; |
| 2411 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; |
| 2412 | return 0; |
| 2413 | } |
| 2414 | |
| 2415 | /* get callback for channel map ctl element |
| 2416 | * stores the channel position firstly matching with the current channels |
| 2417 | */ |
| 2418 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, |
| 2419 | struct snd_ctl_elem_value *ucontrol) |
| 2420 | { |
| 2421 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2422 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); |
| 2423 | struct snd_pcm_substream *substream; |
| 2424 | const struct snd_pcm_chmap_elem *map; |
| 2425 | |
Takashi Iwai | 2deaeaf | 2017-06-14 16:20:32 +0200 | [diff] [blame] | 2426 | if (!info->chmap) |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2427 | return -EINVAL; |
| 2428 | substream = snd_pcm_chmap_substream(info, idx); |
| 2429 | if (!substream) |
| 2430 | return -ENODEV; |
| 2431 | memset(ucontrol->value.integer.value, 0, |
Takashi Iwai | fbd3eb7 | 2020-01-04 09:35:56 +0100 | [diff] [blame] | 2432 | sizeof(long) * info->max_channels); |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2433 | if (!substream->runtime) |
| 2434 | return 0; /* no channels set */ |
| 2435 | for (map = info->chmap; map->channels; map++) { |
| 2436 | int i; |
| 2437 | if (map->channels == substream->runtime->channels && |
| 2438 | valid_chmap_channels(info, map->channels)) { |
| 2439 | for (i = 0; i < map->channels; i++) |
| 2440 | ucontrol->value.integer.value[i] = map->map[i]; |
| 2441 | return 0; |
| 2442 | } |
| 2443 | } |
| 2444 | return -EINVAL; |
| 2445 | } |
| 2446 | |
| 2447 | /* tlv callback for channel map ctl element |
| 2448 | * expands the pre-defined channel maps in a form of TLV |
| 2449 | */ |
| 2450 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, |
| 2451 | unsigned int size, unsigned int __user *tlv) |
| 2452 | { |
| 2453 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2454 | const struct snd_pcm_chmap_elem *map; |
| 2455 | unsigned int __user *dst; |
| 2456 | int c, count = 0; |
| 2457 | |
Takashi Iwai | 2deaeaf | 2017-06-14 16:20:32 +0200 | [diff] [blame] | 2458 | if (!info->chmap) |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2459 | return -EINVAL; |
| 2460 | if (size < 8) |
| 2461 | return -ENOMEM; |
| 2462 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) |
| 2463 | return -EFAULT; |
| 2464 | size -= 8; |
| 2465 | dst = tlv + 2; |
| 2466 | for (map = info->chmap; map->channels; map++) { |
| 2467 | int chs_bytes = map->channels * 4; |
| 2468 | if (!valid_chmap_channels(info, map->channels)) |
| 2469 | continue; |
| 2470 | if (size < 8) |
| 2471 | return -ENOMEM; |
| 2472 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || |
| 2473 | put_user(chs_bytes, dst + 1)) |
| 2474 | return -EFAULT; |
| 2475 | dst += 2; |
| 2476 | size -= 8; |
| 2477 | count += 8; |
| 2478 | if (size < chs_bytes) |
| 2479 | return -ENOMEM; |
| 2480 | size -= chs_bytes; |
| 2481 | count += chs_bytes; |
| 2482 | for (c = 0; c < map->channels; c++) { |
| 2483 | if (put_user(map->map[c], dst)) |
| 2484 | return -EFAULT; |
| 2485 | dst++; |
| 2486 | } |
| 2487 | } |
| 2488 | if (put_user(count, tlv + 1)) |
| 2489 | return -EFAULT; |
| 2490 | return 0; |
| 2491 | } |
| 2492 | |
| 2493 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) |
| 2494 | { |
| 2495 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2496 | info->pcm->streams[info->stream].chmap_kctl = NULL; |
| 2497 | kfree(info); |
| 2498 | } |
| 2499 | |
| 2500 | /** |
| 2501 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements |
| 2502 | * @pcm: the assigned PCM instance |
| 2503 | * @stream: stream direction |
| 2504 | * @chmap: channel map elements (for query) |
| 2505 | * @max_channels: the max number of channels for the stream |
| 2506 | * @private_value: the value passed to each kcontrol's private_value field |
| 2507 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL |
| 2508 | * |
| 2509 | * Create channel-mapping control elements assigned to the given PCM stream(s). |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 2510 | * Return: Zero if successful, or a negative error value. |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2511 | */ |
| 2512 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, |
| 2513 | const struct snd_pcm_chmap_elem *chmap, |
| 2514 | int max_channels, |
| 2515 | unsigned long private_value, |
| 2516 | struct snd_pcm_chmap **info_ret) |
| 2517 | { |
| 2518 | struct snd_pcm_chmap *info; |
| 2519 | struct snd_kcontrol_new knew = { |
| 2520 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, |
| 2521 | .access = SNDRV_CTL_ELEM_ACCESS_READ | |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2522 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
| 2523 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, |
| 2524 | .info = pcm_chmap_ctl_info, |
| 2525 | .get = pcm_chmap_ctl_get, |
| 2526 | .tlv.c = pcm_chmap_ctl_tlv, |
| 2527 | }; |
| 2528 | int err; |
| 2529 | |
Takashi Iwai | 8d879be | 2016-05-10 16:07:40 +0200 | [diff] [blame] | 2530 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
| 2531 | return -EBUSY; |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2532 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
| 2533 | if (!info) |
| 2534 | return -ENOMEM; |
| 2535 | info->pcm = pcm; |
| 2536 | info->stream = stream; |
| 2537 | info->chmap = chmap; |
| 2538 | info->max_channels = max_channels; |
| 2539 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 2540 | knew.name = "Playback Channel Map"; |
| 2541 | else |
| 2542 | knew.name = "Capture Channel Map"; |
| 2543 | knew.device = pcm->device; |
| 2544 | knew.count = pcm->streams[stream].substream_count; |
| 2545 | knew.private_value = private_value; |
| 2546 | info->kctl = snd_ctl_new1(&knew, info); |
| 2547 | if (!info->kctl) { |
| 2548 | kfree(info); |
| 2549 | return -ENOMEM; |
| 2550 | } |
| 2551 | info->kctl->private_free = pcm_chmap_ctl_private_free; |
| 2552 | err = snd_ctl_add(pcm->card, info->kctl); |
| 2553 | if (err < 0) |
| 2554 | return err; |
| 2555 | pcm->streams[stream].chmap_kctl = info->kctl; |
| 2556 | if (info_ret) |
| 2557 | *info_ret = info; |
| 2558 | return 0; |
| 2559 | } |
| 2560 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |