Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Digital Audio (PCM) abstract layer |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Abramo Bagnara <abramo@alsa-project.org> |
| 5 | * |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/slab.h> |
| 24 | #include <linux/time.h> |
Takashi Iwai | 3f7440a | 2009-06-05 17:40:04 +0200 | [diff] [blame] | 25 | #include <linux/math64.h> |
Paul Gortmaker | d81a6d7 | 2011-09-22 09:34:58 -0400 | [diff] [blame] | 26 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <sound/core.h> |
| 28 | #include <sound/control.h> |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 29 | #include <sound/tlv.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <sound/info.h> |
| 31 | #include <sound/pcm.h> |
| 32 | #include <sound/pcm_params.h> |
| 33 | #include <sound/timer.h> |
| 34 | |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 35 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 36 | #define CREATE_TRACE_POINTS |
| 37 | #include "pcm_trace.h" |
| 38 | #else |
| 39 | #define trace_hwptr(substream, pos, in_interrupt) |
| 40 | #define trace_xrun(substream) |
| 41 | #define trace_hw_ptr_error(substream, reason) |
| 42 | #endif |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | /* |
| 45 | * fill ring buffer with silence |
| 46 | * runtime->silence_start: starting pointer to silence area |
| 47 | * runtime->silence_filled: size filled with silence |
| 48 | * runtime->silence_threshold: threshold from application |
| 49 | * runtime->silence_size: maximal size from application |
| 50 | * |
| 51 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately |
| 52 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 53 | 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] | 54 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 55 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | snd_pcm_uframes_t frames, ofs, transfer; |
| 57 | |
| 58 | if (runtime->silence_size < runtime->boundary) { |
| 59 | snd_pcm_sframes_t noise_dist, n; |
| 60 | if (runtime->silence_start != runtime->control->appl_ptr) { |
| 61 | n = runtime->control->appl_ptr - runtime->silence_start; |
| 62 | if (n < 0) |
| 63 | n += runtime->boundary; |
| 64 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) |
| 65 | runtime->silence_filled -= n; |
| 66 | else |
| 67 | runtime->silence_filled = 0; |
| 68 | runtime->silence_start = runtime->control->appl_ptr; |
| 69 | } |
Takashi Iwai | 235475c | 2005-12-07 15:28:07 +0100 | [diff] [blame] | 70 | if (runtime->silence_filled >= runtime->buffer_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
| 73 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) |
| 74 | return; |
| 75 | frames = runtime->silence_threshold - noise_dist; |
| 76 | if (frames > runtime->silence_size) |
| 77 | frames = runtime->silence_size; |
| 78 | } else { |
| 79 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ |
| 80 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); |
Jaroslav Kysela | 9e216e8 | 2010-07-19 16:37:39 +0200 | [diff] [blame] | 81 | if (avail > runtime->buffer_size) |
| 82 | avail = runtime->buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | runtime->silence_filled = avail > 0 ? avail : 0; |
| 84 | runtime->silence_start = (runtime->status->hw_ptr + |
| 85 | runtime->silence_filled) % |
| 86 | runtime->boundary; |
| 87 | } else { |
| 88 | ofs = runtime->status->hw_ptr; |
| 89 | frames = new_hw_ptr - ofs; |
| 90 | if ((snd_pcm_sframes_t)frames < 0) |
| 91 | frames += runtime->boundary; |
| 92 | runtime->silence_filled -= frames; |
| 93 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { |
| 94 | runtime->silence_filled = 0; |
Clemens Ladisch | 9a826dd | 2006-10-23 16:26:57 +0200 | [diff] [blame] | 95 | runtime->silence_start = new_hw_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } else { |
Clemens Ladisch | 9a826dd | 2006-10-23 16:26:57 +0200 | [diff] [blame] | 97 | runtime->silence_start = ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | frames = runtime->buffer_size - runtime->silence_filled; |
| 101 | } |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 102 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
| 103 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | if (frames == 0) |
| 105 | return; |
Clemens Ladisch | 9a826dd | 2006-10-23 16:26:57 +0200 | [diff] [blame] | 106 | ofs = runtime->silence_start % runtime->buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | while (frames > 0) { |
| 108 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; |
| 109 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || |
| 110 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { |
| 111 | if (substream->ops->silence) { |
| 112 | int err; |
| 113 | err = substream->ops->silence(substream, -1, ofs, transfer); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 114 | snd_BUG_ON(err < 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } else { |
| 116 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); |
| 117 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); |
| 118 | } |
| 119 | } else { |
| 120 | unsigned int c; |
| 121 | unsigned int channels = runtime->channels; |
| 122 | if (substream->ops->silence) { |
| 123 | for (c = 0; c < channels; ++c) { |
| 124 | int err; |
| 125 | err = substream->ops->silence(substream, c, ofs, transfer); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 126 | snd_BUG_ON(err < 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | } else { |
| 129 | size_t dma_csize = runtime->dma_bytes / channels; |
| 130 | for (c = 0; c < channels; ++c) { |
| 131 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); |
| 132 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); |
| 133 | } |
| 134 | } |
| 135 | } |
| 136 | runtime->silence_filled += transfer; |
| 137 | frames -= transfer; |
| 138 | ofs = 0; |
| 139 | } |
| 140 | } |
| 141 | |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 142 | #ifdef CONFIG_SND_DEBUG |
| 143 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, |
Takashi Iwai | c0070110 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 144 | char *name, size_t len) |
| 145 | { |
| 146 | snprintf(name, len, "pcmC%dD%d%c:%d", |
| 147 | substream->pcm->card->number, |
| 148 | substream->pcm->device, |
| 149 | substream->stream ? 'c' : 'p', |
| 150 | substream->number); |
| 151 | } |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 152 | EXPORT_SYMBOL(snd_pcm_debug_name); |
| 153 | #endif |
Takashi Iwai | c0070110 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 154 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 155 | #define XRUN_DEBUG_BASIC (1<<0) |
| 156 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ |
| 157 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 158 | |
| 159 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 160 | |
| 161 | #define xrun_debug(substream, mask) \ |
| 162 | ((substream)->pstr->xrun_debug & (mask)) |
Jarkko Nikula | 0f17014 | 2010-03-26 16:07:25 +0200 | [diff] [blame] | 163 | #else |
| 164 | #define xrun_debug(substream, mask) 0 |
| 165 | #endif |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 166 | |
| 167 | #define dump_stack_on_xrun(substream) do { \ |
| 168 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ |
| 169 | dump_stack(); \ |
| 170 | } while (0) |
| 171 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 172 | static void xrun(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | { |
Jaroslav Kysela | 13f040f | 2009-05-28 11:31:20 +0200 | [diff] [blame] | 174 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 175 | |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 176 | trace_xrun(substream); |
Jaroslav Kysela | 13f040f | 2009-05-28 11:31:20 +0200 | [diff] [blame] | 177 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
| 178 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
Jaroslav Kysela | 741b20c | 2009-12-17 17:34:39 +0100 | [diff] [blame] | 180 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
Takashi Iwai | c0070110 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 181 | char name[16]; |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 182 | snd_pcm_debug_name(substream, name, sizeof(name)); |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 183 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 184 | dump_stack_on_xrun(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Jarkko Nikula | 0f17014 | 2010-03-26 16:07:25 +0200 | [diff] [blame] | 188 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 189 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 190 | do { \ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 191 | trace_hw_ptr_error(substream, reason); \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 192 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 193 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
| 194 | (in_interrupt) ? 'Q' : 'P', ##args); \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 195 | dump_stack_on_xrun(substream); \ |
| 196 | } \ |
| 197 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 199 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
| 200 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 201 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 202 | |
| 203 | #endif |
| 204 | |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 205 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
| 206 | struct snd_pcm_runtime *runtime) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | { |
| 208 | snd_pcm_uframes_t avail; |
| 209 | |
| 210 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 211 | avail = snd_pcm_playback_avail(runtime); |
| 212 | else |
| 213 | avail = snd_pcm_capture_avail(runtime); |
| 214 | if (avail > runtime->avail_max) |
| 215 | runtime->avail_max = avail; |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 216 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
| 217 | if (avail >= runtime->buffer_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | snd_pcm_drain_done(substream); |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 219 | return -EPIPE; |
| 220 | } |
| 221 | } else { |
| 222 | if (avail >= runtime->stop_threshold) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | xrun(substream); |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 224 | return -EPIPE; |
| 225 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 227 | if (runtime->twake) { |
| 228 | if (avail >= runtime->twake) |
| 229 | wake_up(&runtime->tsleep); |
| 230 | } else if (avail >= runtime->control->avail_min) |
| 231 | wake_up(&runtime->sleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | return 0; |
| 233 | } |
| 234 | |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 235 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
| 236 | struct timespec *curr_tstamp, |
| 237 | struct timespec *audio_tstamp) |
| 238 | { |
| 239 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 240 | u64 audio_frames, audio_nsecs; |
| 241 | struct timespec driver_tstamp; |
| 242 | |
| 243 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) |
| 244 | return; |
| 245 | |
| 246 | if (!(substream->ops->get_time_info) || |
| 247 | (runtime->audio_tstamp_report.actual_type == |
| 248 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { |
| 249 | |
| 250 | /* |
| 251 | * provide audio timestamp derived from pointer position |
| 252 | * add delay only if requested |
| 253 | */ |
| 254 | |
| 255 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; |
| 256 | |
| 257 | if (runtime->audio_tstamp_config.report_delay) { |
| 258 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 259 | audio_frames -= runtime->delay; |
| 260 | else |
| 261 | audio_frames += runtime->delay; |
| 262 | } |
| 263 | audio_nsecs = div_u64(audio_frames * 1000000000LL, |
| 264 | runtime->rate); |
| 265 | *audio_tstamp = ns_to_timespec(audio_nsecs); |
| 266 | } |
| 267 | runtime->status->audio_tstamp = *audio_tstamp; |
| 268 | runtime->status->tstamp = *curr_tstamp; |
| 269 | |
| 270 | /* |
| 271 | * re-take a driver timestamp to let apps detect if the reference tstamp |
| 272 | * read by low-level hardware was provided with a delay |
| 273 | */ |
| 274 | snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); |
| 275 | runtime->driver_tstamp = driver_tstamp; |
| 276 | } |
| 277 | |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 278 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
| 279 | unsigned int in_interrupt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 281 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | snd_pcm_uframes_t pos; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 283 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 284 | snd_pcm_sframes_t hdelta, delta; |
| 285 | unsigned long jdelta; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 286 | unsigned long curr_jiffies; |
| 287 | struct timespec curr_tstamp; |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 288 | struct timespec audio_tstamp; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 289 | int crossed_boundary = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 291 | old_hw_ptr = runtime->status->hw_ptr; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 292 | |
| 293 | /* |
| 294 | * group pointer, time and jiffies reads to allow for more |
| 295 | * accurate correlations/corrections. |
| 296 | * The values are stored at the end of this routine after |
| 297 | * corrections for hw_ptr position |
| 298 | */ |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 299 | pos = substream->ops->pointer(substream); |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 300 | curr_jiffies = jiffies; |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 301 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 302 | if ((substream->ops->get_time_info) && |
| 303 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { |
| 304 | substream->ops->get_time_info(substream, &curr_tstamp, |
| 305 | &audio_tstamp, |
| 306 | &runtime->audio_tstamp_config, |
| 307 | &runtime->audio_tstamp_report); |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 308 | |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 309 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ |
| 310 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) |
| 311 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); |
| 312 | } else |
| 313 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 314 | } |
| 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (pos == SNDRV_PCM_POS_XRUN) { |
| 317 | xrun(substream); |
| 318 | return -EPIPE; |
| 319 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 320 | if (pos >= runtime->buffer_size) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 321 | if (printk_ratelimit()) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 322 | char name[16]; |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 323 | snd_pcm_debug_name(substream, name, sizeof(name)); |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 324 | pcm_err(substream->pcm, |
Takashi Iwai | 0ab1ace | 2016-03-10 20:56:20 +0100 | [diff] [blame] | 325 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 326 | name, pos, runtime->buffer_size, |
| 327 | runtime->period_size); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 328 | } |
| 329 | pos = 0; |
Takashi Iwai | cedb811 | 2009-07-23 11:04:13 +0200 | [diff] [blame] | 330 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 331 | pos -= pos % runtime->min_align; |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 332 | trace_hwptr(substream, pos, in_interrupt); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 333 | hw_base = runtime->hw_ptr_base; |
| 334 | new_hw_ptr = hw_base + pos; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 335 | if (in_interrupt) { |
| 336 | /* we know that one period was processed */ |
| 337 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 338 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 339 | if (delta > new_hw_ptr) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 340 | /* check for double acknowledged interrupts */ |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 341 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Koro Chen | 13a9883 | 2015-05-13 22:39:03 +0800 | [diff] [blame] | 342 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 343 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 344 | if (hw_base >= runtime->boundary) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 345 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 346 | crossed_boundary++; |
| 347 | } |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 348 | new_hw_ptr = hw_base + pos; |
| 349 | goto __delta; |
| 350 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 353 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
| 354 | /* pointer crosses the end of the ring buffer */ |
| 355 | if (new_hw_ptr < old_hw_ptr) { |
| 356 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 357 | if (hw_base >= runtime->boundary) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 358 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 359 | crossed_boundary++; |
| 360 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 361 | new_hw_ptr = hw_base + pos; |
| 362 | } |
| 363 | __delta: |
Clemens Ladisch | b406e61 | 2010-05-25 09:01:46 +0200 | [diff] [blame] | 364 | delta = new_hw_ptr - old_hw_ptr; |
| 365 | if (delta < 0) |
| 366 | delta += runtime->boundary; |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 367 | |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 368 | if (runtime->no_period_wakeup) { |
Kelly Anderson | 12ff414 | 2011-04-01 11:58:25 +0200 | [diff] [blame] | 369 | snd_pcm_sframes_t xrun_threshold; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 370 | /* |
| 371 | * Without regular period interrupts, we have to check |
| 372 | * the elapsed time to detect xruns. |
| 373 | */ |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 374 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Clemens Ladisch | 47228e4 | 2010-11-18 09:53:07 +0100 | [diff] [blame] | 375 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
| 376 | goto no_delta_check; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 377 | hdelta = jdelta - delta * HZ / runtime->rate; |
Kelly Anderson | 12ff414 | 2011-04-01 11:58:25 +0200 | [diff] [blame] | 378 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
| 379 | while (hdelta > xrun_threshold) { |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 380 | delta += runtime->buffer_size; |
| 381 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 382 | if (hw_base >= runtime->boundary) { |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 383 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 384 | crossed_boundary++; |
| 385 | } |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 386 | new_hw_ptr = hw_base + pos; |
| 387 | hdelta -= runtime->hw_ptr_buffer_jiffies; |
| 388 | } |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 389 | goto no_delta_check; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 390 | } |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 391 | |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 392 | /* something must be really wrong */ |
Jaroslav Kysela | 7b3a177 | 2010-01-08 08:43:01 +0100 | [diff] [blame] | 393 | if (delta >= runtime->buffer_size + runtime->period_size) { |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 394 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
| 395 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", |
| 396 | substream->stream, (long)pos, |
| 397 | (long)new_hw_ptr, (long)old_hw_ptr); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 398 | return 0; |
| 399 | } |
Takashi Iwai | c87d973 | 2009-05-27 10:53:33 +0200 | [diff] [blame] | 400 | |
| 401 | /* Do jiffies check only in xrun_debug mode */ |
Jaroslav Kysela | 741b20c | 2009-12-17 17:34:39 +0100 | [diff] [blame] | 402 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
Takashi Iwai | c87d973 | 2009-05-27 10:53:33 +0200 | [diff] [blame] | 403 | goto no_jiffies_check; |
| 404 | |
Takashi Iwai | 3e5b501 | 2009-04-28 12:07:08 +0200 | [diff] [blame] | 405 | /* Skip the jiffies check for hardwares with BATCH flag. |
| 406 | * Such hardware usually just increases the position at each IRQ, |
| 407 | * thus it can't give any strange position. |
| 408 | */ |
| 409 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) |
| 410 | goto no_jiffies_check; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 411 | hdelta = delta; |
Jaroslav Kysela | a4444da | 2009-05-28 12:31:56 +0200 | [diff] [blame] | 412 | if (hdelta < runtime->delay) |
| 413 | goto no_jiffies_check; |
| 414 | hdelta -= runtime->delay; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 415 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 416 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
| 417 | delta = jdelta / |
| 418 | (((runtime->period_size * HZ) / runtime->rate) |
| 419 | + HZ/100); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 420 | /* move new_hw_ptr according jiffies not pos variable */ |
| 421 | new_hw_ptr = old_hw_ptr; |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 422 | hw_base = delta; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 423 | /* use loop to avoid checks for delta overflows */ |
| 424 | /* the delta value is small or zero in most cases */ |
| 425 | while (delta > 0) { |
| 426 | new_hw_ptr += runtime->period_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 427 | if (new_hw_ptr >= runtime->boundary) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 428 | new_hw_ptr -= runtime->boundary; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 429 | crossed_boundary--; |
| 430 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 431 | delta--; |
| 432 | } |
| 433 | /* align hw_base to buffer_size */ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 434 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
| 435 | "(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] | 436 | (long)pos, (long)hdelta, |
| 437 | (long)runtime->period_size, jdelta, |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 438 | ((hdelta * HZ) / runtime->rate), hw_base, |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 439 | (unsigned long)old_hw_ptr, |
| 440 | (unsigned long)new_hw_ptr); |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 441 | /* reset values to proper state */ |
| 442 | delta = 0; |
| 443 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 444 | } |
Takashi Iwai | 3e5b501 | 2009-04-28 12:07:08 +0200 | [diff] [blame] | 445 | no_jiffies_check: |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 446 | if (delta > runtime->period_size + runtime->period_size / 2) { |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame] | 447 | hw_ptr_error(substream, in_interrupt, |
| 448 | "Lost interrupts?", |
| 449 | "(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] | 450 | substream->stream, (long)delta, |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 451 | (long)new_hw_ptr, |
| 452 | (long)old_hw_ptr); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 453 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 454 | |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 455 | no_delta_check: |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 456 | if (runtime->status->hw_ptr == new_hw_ptr) { |
| 457 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 458 | return 0; |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 459 | } |
Takashi Iwai | ab1863f | 2009-06-07 12:09:17 +0200 | [diff] [blame] | 460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 462 | runtime->silence_size > 0) |
| 463 | snd_pcm_playback_silence(substream, new_hw_ptr); |
| 464 | |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 465 | if (in_interrupt) { |
Clemens Ladisch | ead4046 | 2010-05-21 09:15:59 +0200 | [diff] [blame] | 466 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
| 467 | if (delta < 0) |
| 468 | delta += runtime->boundary; |
| 469 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; |
| 470 | runtime->hw_ptr_interrupt += delta; |
| 471 | if (runtime->hw_ptr_interrupt >= runtime->boundary) |
| 472 | runtime->hw_ptr_interrupt -= runtime->boundary; |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 473 | } |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 474 | runtime->hw_ptr_base = hw_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | runtime->status->hw_ptr = new_hw_ptr; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 476 | runtime->hw_ptr_jiffies = curr_jiffies; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 477 | if (crossed_boundary) { |
| 478 | snd_BUG_ON(crossed_boundary != 1); |
| 479 | runtime->hw_ptr_wrap += runtime->boundary; |
| 480 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 482 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 483 | |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 484 | return snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | /* CAUTION: call it with irq disabled */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 488 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 490 | return snd_pcm_update_hw_ptr0(substream, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | /** |
| 494 | * snd_pcm_set_ops - set the PCM operators |
| 495 | * @pcm: the pcm instance |
| 496 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX |
| 497 | * @ops: the operator table |
| 498 | * |
| 499 | * Sets the given PCM operators to the pcm instance. |
| 500 | */ |
Lars-Peter Clausen | e6c2e7e | 2013-05-24 15:18:10 +0200 | [diff] [blame] | 501 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
| 502 | const struct snd_pcm_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 504 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
| 505 | struct snd_pcm_substream *substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
| 507 | for (substream = stream->substream; substream != NULL; substream = substream->next) |
| 508 | substream->ops = ops; |
| 509 | } |
| 510 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 511 | EXPORT_SYMBOL(snd_pcm_set_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | /** |
| 514 | * snd_pcm_sync - set the PCM sync id |
| 515 | * @substream: the pcm substream |
| 516 | * |
| 517 | * Sets the PCM sync identifier for the card. |
| 518 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 519 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 521 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
| 523 | runtime->sync.id32[0] = substream->pcm->card->number; |
| 524 | runtime->sync.id32[1] = -1; |
| 525 | runtime->sync.id32[2] = -1; |
| 526 | runtime->sync.id32[3] = -1; |
| 527 | } |
| 528 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 529 | EXPORT_SYMBOL(snd_pcm_set_sync); |
| 530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | /* |
| 532 | * Standard ioctl routine |
| 533 | */ |
| 534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | static inline unsigned int div32(unsigned int a, unsigned int b, |
| 536 | unsigned int *r) |
| 537 | { |
| 538 | if (b == 0) { |
| 539 | *r = 0; |
| 540 | return UINT_MAX; |
| 541 | } |
| 542 | *r = a % b; |
| 543 | return a / b; |
| 544 | } |
| 545 | |
| 546 | static inline unsigned int div_down(unsigned int a, unsigned int b) |
| 547 | { |
| 548 | if (b == 0) |
| 549 | return UINT_MAX; |
| 550 | return a / b; |
| 551 | } |
| 552 | |
| 553 | static inline unsigned int div_up(unsigned int a, unsigned int b) |
| 554 | { |
| 555 | unsigned int r; |
| 556 | unsigned int q; |
| 557 | if (b == 0) |
| 558 | return UINT_MAX; |
| 559 | q = div32(a, b, &r); |
| 560 | if (r) |
| 561 | ++q; |
| 562 | return q; |
| 563 | } |
| 564 | |
| 565 | static inline unsigned int mul(unsigned int a, unsigned int b) |
| 566 | { |
| 567 | if (a == 0) |
| 568 | return 0; |
| 569 | if (div_down(UINT_MAX, a) < b) |
| 570 | return UINT_MAX; |
| 571 | return a * b; |
| 572 | } |
| 573 | |
| 574 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, |
| 575 | unsigned int c, unsigned int *r) |
| 576 | { |
| 577 | u_int64_t n = (u_int64_t) a * b; |
| 578 | if (c == 0) { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 579 | snd_BUG_ON(!n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | *r = 0; |
| 581 | return UINT_MAX; |
| 582 | } |
Takashi Iwai | 3f7440a | 2009-06-05 17:40:04 +0200 | [diff] [blame] | 583 | n = div_u64_rem(n, c, r); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if (n >= UINT_MAX) { |
| 585 | *r = 0; |
| 586 | return UINT_MAX; |
| 587 | } |
| 588 | return n; |
| 589 | } |
| 590 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | /** |
| 592 | * snd_interval_refine - refine the interval value of configurator |
| 593 | * @i: the interval value to refine |
| 594 | * @v: the interval value to refer to |
| 595 | * |
| 596 | * Refines the interval value with the reference value. |
| 597 | * The interval is changed to the range satisfying both intervals. |
| 598 | * The interval status (min, max, integer, etc.) are evaluated. |
| 599 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 600 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 601 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 603 | 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] | 604 | { |
| 605 | int changed = 0; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 606 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 607 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | if (i->min < v->min) { |
| 609 | i->min = v->min; |
| 610 | i->openmin = v->openmin; |
| 611 | changed = 1; |
| 612 | } else if (i->min == v->min && !i->openmin && v->openmin) { |
| 613 | i->openmin = 1; |
| 614 | changed = 1; |
| 615 | } |
| 616 | if (i->max > v->max) { |
| 617 | i->max = v->max; |
| 618 | i->openmax = v->openmax; |
| 619 | changed = 1; |
| 620 | } else if (i->max == v->max && !i->openmax && v->openmax) { |
| 621 | i->openmax = 1; |
| 622 | changed = 1; |
| 623 | } |
| 624 | if (!i->integer && v->integer) { |
| 625 | i->integer = 1; |
| 626 | changed = 1; |
| 627 | } |
| 628 | if (i->integer) { |
| 629 | if (i->openmin) { |
| 630 | i->min++; |
| 631 | i->openmin = 0; |
| 632 | } |
| 633 | if (i->openmax) { |
| 634 | i->max--; |
| 635 | i->openmax = 0; |
| 636 | } |
| 637 | } else if (!i->openmin && !i->openmax && i->min == i->max) |
| 638 | i->integer = 1; |
| 639 | if (snd_interval_checkempty(i)) { |
| 640 | snd_interval_none(i); |
| 641 | return -EINVAL; |
| 642 | } |
| 643 | return changed; |
| 644 | } |
| 645 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 646 | EXPORT_SYMBOL(snd_interval_refine); |
| 647 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 648 | static int snd_interval_refine_first(struct snd_interval *i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 650 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 651 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | if (snd_interval_single(i)) |
| 653 | return 0; |
| 654 | i->max = i->min; |
| 655 | i->openmax = i->openmin; |
| 656 | if (i->openmax) |
| 657 | i->max++; |
| 658 | return 1; |
| 659 | } |
| 660 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 661 | static int snd_interval_refine_last(struct snd_interval *i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 663 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 664 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | if (snd_interval_single(i)) |
| 666 | return 0; |
| 667 | i->min = i->max; |
| 668 | i->openmin = i->openmax; |
| 669 | if (i->openmin) |
| 670 | i->min--; |
| 671 | return 1; |
| 672 | } |
| 673 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 674 | 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] | 675 | { |
| 676 | if (a->empty || b->empty) { |
| 677 | snd_interval_none(c); |
| 678 | return; |
| 679 | } |
| 680 | c->empty = 0; |
| 681 | c->min = mul(a->min, b->min); |
| 682 | c->openmin = (a->openmin || b->openmin); |
| 683 | c->max = mul(a->max, b->max); |
| 684 | c->openmax = (a->openmax || b->openmax); |
| 685 | c->integer = (a->integer && b->integer); |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * snd_interval_div - refine the interval value with division |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 690 | * @a: dividend |
| 691 | * @b: divisor |
| 692 | * @c: quotient |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | * |
| 694 | * c = a / b |
| 695 | * |
| 696 | * Returns non-zero if the value is changed, zero if not changed. |
| 697 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 698 | 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] | 699 | { |
| 700 | unsigned int r; |
| 701 | if (a->empty || b->empty) { |
| 702 | snd_interval_none(c); |
| 703 | return; |
| 704 | } |
| 705 | c->empty = 0; |
| 706 | c->min = div32(a->min, b->max, &r); |
| 707 | c->openmin = (r || a->openmin || b->openmax); |
| 708 | if (b->min > 0) { |
| 709 | c->max = div32(a->max, b->min, &r); |
| 710 | if (r) { |
| 711 | c->max++; |
| 712 | c->openmax = 1; |
| 713 | } else |
| 714 | c->openmax = (a->openmax || b->openmin); |
| 715 | } else { |
| 716 | c->max = UINT_MAX; |
| 717 | c->openmax = 0; |
| 718 | } |
| 719 | c->integer = 0; |
| 720 | } |
| 721 | |
| 722 | /** |
| 723 | * snd_interval_muldivk - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 724 | * @a: dividend 1 |
| 725 | * @b: dividend 2 |
| 726 | * @k: divisor (as integer) |
| 727 | * @c: result |
| 728 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | * c = a * b / k |
| 730 | * |
| 731 | * Returns non-zero if the value is changed, zero if not changed. |
| 732 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 733 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
| 734 | unsigned int k, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | { |
| 736 | unsigned int r; |
| 737 | if (a->empty || b->empty) { |
| 738 | snd_interval_none(c); |
| 739 | return; |
| 740 | } |
| 741 | c->empty = 0; |
| 742 | c->min = muldiv32(a->min, b->min, k, &r); |
| 743 | c->openmin = (r || a->openmin || b->openmin); |
| 744 | c->max = muldiv32(a->max, b->max, k, &r); |
| 745 | if (r) { |
| 746 | c->max++; |
| 747 | c->openmax = 1; |
| 748 | } else |
| 749 | c->openmax = (a->openmax || b->openmax); |
| 750 | c->integer = 0; |
| 751 | } |
| 752 | |
| 753 | /** |
| 754 | * snd_interval_mulkdiv - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 755 | * @a: dividend 1 |
| 756 | * @k: dividend 2 (as integer) |
| 757 | * @b: divisor |
| 758 | * @c: result |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | * |
| 760 | * c = a * k / b |
| 761 | * |
| 762 | * Returns non-zero if the value is changed, zero if not changed. |
| 763 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 764 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
| 765 | const struct snd_interval *b, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | { |
| 767 | unsigned int r; |
| 768 | if (a->empty || b->empty) { |
| 769 | snd_interval_none(c); |
| 770 | return; |
| 771 | } |
| 772 | c->empty = 0; |
| 773 | c->min = muldiv32(a->min, k, b->max, &r); |
| 774 | c->openmin = (r || a->openmin || b->openmax); |
| 775 | if (b->min > 0) { |
| 776 | c->max = muldiv32(a->max, k, b->min, &r); |
| 777 | if (r) { |
| 778 | c->max++; |
| 779 | c->openmax = 1; |
| 780 | } else |
| 781 | c->openmax = (a->openmax || b->openmin); |
| 782 | } else { |
| 783 | c->max = UINT_MAX; |
| 784 | c->openmax = 0; |
| 785 | } |
| 786 | c->integer = 0; |
| 787 | } |
| 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | /* ---- */ |
| 790 | |
| 791 | |
| 792 | /** |
| 793 | * snd_interval_ratnum - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 794 | * @i: interval to refine |
| 795 | * @rats_count: number of ratnum_t |
| 796 | * @rats: ratnum_t array |
| 797 | * @nump: pointer to store the resultant numerator |
| 798 | * @denp: pointer to store the resultant denominator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 800 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 801 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 803 | int snd_interval_ratnum(struct snd_interval *i, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 804 | unsigned int rats_count, const struct snd_ratnum *rats, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 805 | unsigned int *nump, unsigned int *denp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | { |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 807 | unsigned int best_num, best_den; |
| 808 | int best_diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | unsigned int k; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 810 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | int err; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 812 | unsigned int result_num, result_den; |
| 813 | int result_diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | |
| 815 | best_num = best_den = best_diff = 0; |
| 816 | for (k = 0; k < rats_count; ++k) { |
| 817 | unsigned int num = rats[k].num; |
| 818 | unsigned int den; |
| 819 | unsigned int q = i->min; |
| 820 | int diff; |
| 821 | if (q == 0) |
| 822 | q = 1; |
Krzysztof Helt | 40962d7 | 2009-12-19 18:31:04 +0100 | [diff] [blame] | 823 | den = div_up(num, q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | if (den < rats[k].den_min) |
| 825 | continue; |
| 826 | if (den > rats[k].den_max) |
| 827 | den = rats[k].den_max; |
| 828 | else { |
| 829 | unsigned int r; |
| 830 | r = (den - rats[k].den_min) % rats[k].den_step; |
| 831 | if (r != 0) |
| 832 | den -= r; |
| 833 | } |
| 834 | diff = num - q * den; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 835 | if (diff < 0) |
| 836 | diff = -diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | if (best_num == 0 || |
| 838 | diff * best_den < best_diff * den) { |
| 839 | best_diff = diff; |
| 840 | best_den = den; |
| 841 | best_num = num; |
| 842 | } |
| 843 | } |
| 844 | if (best_den == 0) { |
| 845 | i->empty = 1; |
| 846 | return -EINVAL; |
| 847 | } |
| 848 | t.min = div_down(best_num, best_den); |
| 849 | t.openmin = !!(best_num % best_den); |
| 850 | |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 851 | result_num = best_num; |
| 852 | result_diff = best_diff; |
| 853 | result_den = best_den; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | best_num = best_den = best_diff = 0; |
| 855 | for (k = 0; k < rats_count; ++k) { |
| 856 | unsigned int num = rats[k].num; |
| 857 | unsigned int den; |
| 858 | unsigned int q = i->max; |
| 859 | int diff; |
| 860 | if (q == 0) { |
| 861 | i->empty = 1; |
| 862 | return -EINVAL; |
| 863 | } |
Krzysztof Helt | 40962d7 | 2009-12-19 18:31:04 +0100 | [diff] [blame] | 864 | den = div_down(num, q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | if (den > rats[k].den_max) |
| 866 | continue; |
| 867 | if (den < rats[k].den_min) |
| 868 | den = rats[k].den_min; |
| 869 | else { |
| 870 | unsigned int r; |
| 871 | r = (den - rats[k].den_min) % rats[k].den_step; |
| 872 | if (r != 0) |
| 873 | den += rats[k].den_step - r; |
| 874 | } |
| 875 | diff = q * den - num; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 876 | if (diff < 0) |
| 877 | diff = -diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | if (best_num == 0 || |
| 879 | diff * best_den < best_diff * den) { |
| 880 | best_diff = diff; |
| 881 | best_den = den; |
| 882 | best_num = num; |
| 883 | } |
| 884 | } |
| 885 | if (best_den == 0) { |
| 886 | i->empty = 1; |
| 887 | return -EINVAL; |
| 888 | } |
| 889 | t.max = div_up(best_num, best_den); |
| 890 | t.openmax = !!(best_num % best_den); |
| 891 | t.integer = 0; |
| 892 | err = snd_interval_refine(i, &t); |
| 893 | if (err < 0) |
| 894 | return err; |
| 895 | |
| 896 | if (snd_interval_single(i)) { |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 897 | if (best_diff * result_den < result_diff * best_den) { |
| 898 | result_num = best_num; |
| 899 | result_den = best_den; |
| 900 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | if (nump) |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 902 | *nump = result_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | if (denp) |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 904 | *denp = result_den; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
| 906 | return err; |
| 907 | } |
| 908 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 909 | EXPORT_SYMBOL(snd_interval_ratnum); |
| 910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | /** |
| 912 | * snd_interval_ratden - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 913 | * @i: interval to refine |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 914 | * @rats_count: number of struct ratden |
| 915 | * @rats: struct ratden array |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 916 | * @nump: pointer to store the resultant numerator |
| 917 | * @denp: pointer to store the resultant denominator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 919 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 920 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 922 | static int snd_interval_ratden(struct snd_interval *i, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 923 | unsigned int rats_count, |
| 924 | const struct snd_ratden *rats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | unsigned int *nump, unsigned int *denp) |
| 926 | { |
| 927 | unsigned int best_num, best_diff, best_den; |
| 928 | unsigned int k; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 929 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | int err; |
| 931 | |
| 932 | best_num = best_den = best_diff = 0; |
| 933 | for (k = 0; k < rats_count; ++k) { |
| 934 | unsigned int num; |
| 935 | unsigned int den = rats[k].den; |
| 936 | unsigned int q = i->min; |
| 937 | int diff; |
| 938 | num = mul(q, den); |
| 939 | if (num > rats[k].num_max) |
| 940 | continue; |
| 941 | if (num < rats[k].num_min) |
| 942 | num = rats[k].num_max; |
| 943 | else { |
| 944 | unsigned int r; |
| 945 | r = (num - rats[k].num_min) % rats[k].num_step; |
| 946 | if (r != 0) |
| 947 | num += rats[k].num_step - r; |
| 948 | } |
| 949 | diff = num - q * den; |
| 950 | if (best_num == 0 || |
| 951 | diff * best_den < best_diff * den) { |
| 952 | best_diff = diff; |
| 953 | best_den = den; |
| 954 | best_num = num; |
| 955 | } |
| 956 | } |
| 957 | if (best_den == 0) { |
| 958 | i->empty = 1; |
| 959 | return -EINVAL; |
| 960 | } |
| 961 | t.min = div_down(best_num, best_den); |
| 962 | t.openmin = !!(best_num % best_den); |
| 963 | |
| 964 | best_num = best_den = best_diff = 0; |
| 965 | for (k = 0; k < rats_count; ++k) { |
| 966 | unsigned int num; |
| 967 | unsigned int den = rats[k].den; |
| 968 | unsigned int q = i->max; |
| 969 | int diff; |
| 970 | num = mul(q, den); |
| 971 | if (num < rats[k].num_min) |
| 972 | continue; |
| 973 | if (num > rats[k].num_max) |
| 974 | num = rats[k].num_max; |
| 975 | else { |
| 976 | unsigned int r; |
| 977 | r = (num - rats[k].num_min) % rats[k].num_step; |
| 978 | if (r != 0) |
| 979 | num -= r; |
| 980 | } |
| 981 | diff = q * den - num; |
| 982 | if (best_num == 0 || |
| 983 | diff * best_den < best_diff * den) { |
| 984 | best_diff = diff; |
| 985 | best_den = den; |
| 986 | best_num = num; |
| 987 | } |
| 988 | } |
| 989 | if (best_den == 0) { |
| 990 | i->empty = 1; |
| 991 | return -EINVAL; |
| 992 | } |
| 993 | t.max = div_up(best_num, best_den); |
| 994 | t.openmax = !!(best_num % best_den); |
| 995 | t.integer = 0; |
| 996 | err = snd_interval_refine(i, &t); |
| 997 | if (err < 0) |
| 998 | return err; |
| 999 | |
| 1000 | if (snd_interval_single(i)) { |
| 1001 | if (nump) |
| 1002 | *nump = best_num; |
| 1003 | if (denp) |
| 1004 | *denp = best_den; |
| 1005 | } |
| 1006 | return err; |
| 1007 | } |
| 1008 | |
| 1009 | /** |
| 1010 | * snd_interval_list - refine the interval value from the list |
| 1011 | * @i: the interval value to refine |
| 1012 | * @count: the number of elements in the list |
| 1013 | * @list: the value list |
| 1014 | * @mask: the bit-mask to evaluate |
| 1015 | * |
| 1016 | * Refines the interval value from the list. |
| 1017 | * When mask is non-zero, only the elements corresponding to bit 1 are |
| 1018 | * evaluated. |
| 1019 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1020 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1021 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | */ |
Mark Brown | 4af87a9 | 2012-03-14 19:48:43 +0000 | [diff] [blame] | 1023 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
| 1024 | const unsigned int *list, unsigned int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | { |
| 1026 | unsigned int k; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1027 | struct snd_interval list_range; |
Takashi Iwai | 0981a26 | 2007-02-01 14:53:49 +0100 | [diff] [blame] | 1028 | |
| 1029 | if (!count) { |
| 1030 | i->empty = 1; |
| 1031 | return -EINVAL; |
| 1032 | } |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1033 | snd_interval_any(&list_range); |
| 1034 | list_range.min = UINT_MAX; |
| 1035 | list_range.max = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | for (k = 0; k < count; k++) { |
| 1037 | if (mask && !(mask & (1 << k))) |
| 1038 | continue; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1039 | if (!snd_interval_test(i, list[k])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | continue; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1041 | list_range.min = min(list_range.min, list[k]); |
| 1042 | list_range.max = max(list_range.max, list[k]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | } |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1044 | return snd_interval_refine(i, &list_range); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | } |
| 1046 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1047 | EXPORT_SYMBOL(snd_interval_list); |
| 1048 | |
Peter Rosin | f66f898 | 2015-01-28 15:16:06 +0100 | [diff] [blame] | 1049 | /** |
| 1050 | * snd_interval_ranges - refine the interval value from the list of ranges |
| 1051 | * @i: the interval value to refine |
| 1052 | * @count: the number of elements in the list of ranges |
| 1053 | * @ranges: the ranges list |
| 1054 | * @mask: the bit-mask to evaluate |
| 1055 | * |
| 1056 | * Refines the interval value from the list of ranges. |
| 1057 | * When mask is non-zero, only the elements corresponding to bit 1 are |
| 1058 | * evaluated. |
| 1059 | * |
| 1060 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1061 | * negative error code. |
| 1062 | */ |
| 1063 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, |
| 1064 | const struct snd_interval *ranges, unsigned int mask) |
| 1065 | { |
| 1066 | unsigned int k; |
| 1067 | struct snd_interval range_union; |
| 1068 | struct snd_interval range; |
| 1069 | |
| 1070 | if (!count) { |
| 1071 | snd_interval_none(i); |
| 1072 | return -EINVAL; |
| 1073 | } |
| 1074 | snd_interval_any(&range_union); |
| 1075 | range_union.min = UINT_MAX; |
| 1076 | range_union.max = 0; |
| 1077 | for (k = 0; k < count; k++) { |
| 1078 | if (mask && !(mask & (1 << k))) |
| 1079 | continue; |
| 1080 | snd_interval_copy(&range, &ranges[k]); |
| 1081 | if (snd_interval_refine(&range, i) < 0) |
| 1082 | continue; |
| 1083 | if (snd_interval_empty(&range)) |
| 1084 | continue; |
| 1085 | |
| 1086 | if (range.min < range_union.min) { |
| 1087 | range_union.min = range.min; |
| 1088 | range_union.openmin = 1; |
| 1089 | } |
| 1090 | if (range.min == range_union.min && !range.openmin) |
| 1091 | range_union.openmin = 0; |
| 1092 | if (range.max > range_union.max) { |
| 1093 | range_union.max = range.max; |
| 1094 | range_union.openmax = 1; |
| 1095 | } |
| 1096 | if (range.max == range_union.max && !range.openmax) |
| 1097 | range_union.openmax = 0; |
| 1098 | } |
| 1099 | return snd_interval_refine(i, &range_union); |
| 1100 | } |
| 1101 | EXPORT_SYMBOL(snd_interval_ranges); |
| 1102 | |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1103 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | { |
| 1105 | unsigned int n; |
| 1106 | int changed = 0; |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1107 | n = i->min % step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | if (n != 0 || i->openmin) { |
| 1109 | i->min += step - n; |
Clemens Ladisch | df1e471 | 2014-09-07 21:43:41 +0200 | [diff] [blame] | 1110 | i->openmin = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | changed = 1; |
| 1112 | } |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1113 | n = i->max % step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | if (n != 0 || i->openmax) { |
| 1115 | i->max -= n; |
Clemens Ladisch | df1e471 | 2014-09-07 21:43:41 +0200 | [diff] [blame] | 1116 | i->openmax = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | changed = 1; |
| 1118 | } |
| 1119 | if (snd_interval_checkempty(i)) { |
| 1120 | i->empty = 1; |
| 1121 | return -EINVAL; |
| 1122 | } |
| 1123 | return changed; |
| 1124 | } |
| 1125 | |
| 1126 | /* Info constraints helpers */ |
| 1127 | |
| 1128 | /** |
| 1129 | * snd_pcm_hw_rule_add - add the hw-constraint rule |
| 1130 | * @runtime: the pcm runtime instance |
| 1131 | * @cond: condition bits |
| 1132 | * @var: the variable to evaluate |
| 1133 | * @func: the evaluation function |
| 1134 | * @private: the private data pointer passed to function |
| 1135 | * @dep: the dependent variables |
| 1136 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1137 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1139 | 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] | 1140 | int var, |
| 1141 | snd_pcm_hw_rule_func_t func, void *private, |
| 1142 | int dep, ...) |
| 1143 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1144 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1145 | struct snd_pcm_hw_rule *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | unsigned int k; |
| 1147 | va_list args; |
| 1148 | va_start(args, dep); |
| 1149 | if (constrs->rules_num >= constrs->rules_all) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1150 | struct snd_pcm_hw_rule *new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | unsigned int new_rules = constrs->rules_all + 16; |
| 1152 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1153 | if (!new) { |
| 1154 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | return -ENOMEM; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1156 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | if (constrs->rules) { |
| 1158 | memcpy(new, constrs->rules, |
| 1159 | constrs->rules_num * sizeof(*c)); |
| 1160 | kfree(constrs->rules); |
| 1161 | } |
| 1162 | constrs->rules = new; |
| 1163 | constrs->rules_all = new_rules; |
| 1164 | } |
| 1165 | c = &constrs->rules[constrs->rules_num]; |
| 1166 | c->cond = cond; |
| 1167 | c->func = func; |
| 1168 | c->var = var; |
| 1169 | c->private = private; |
| 1170 | k = 0; |
| 1171 | while (1) { |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1172 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
| 1173 | va_end(args); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1174 | return -EINVAL; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1175 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | c->deps[k++] = dep; |
| 1177 | if (dep < 0) |
| 1178 | break; |
| 1179 | dep = va_arg(args, int); |
| 1180 | } |
| 1181 | constrs->rules_num++; |
| 1182 | va_end(args); |
| 1183 | return 0; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1184 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1186 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
| 1187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1189 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1190 | * @runtime: PCM runtime instance |
| 1191 | * @var: hw_params variable to apply the mask |
| 1192 | * @mask: the bitmap mask |
| 1193 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1194 | * 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] | 1195 | * |
| 1196 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1198 | 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] | 1199 | u_int32_t mask) |
| 1200 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1201 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1202 | struct snd_mask *maskp = constrs_mask(constrs, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | *maskp->bits &= mask; |
| 1204 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ |
| 1205 | if (*maskp->bits == 0) |
| 1206 | return -EINVAL; |
| 1207 | return 0; |
| 1208 | } |
| 1209 | |
| 1210 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1211 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1212 | * @runtime: PCM runtime instance |
| 1213 | * @var: hw_params variable to apply the mask |
| 1214 | * @mask: the 64bit bitmap mask |
| 1215 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1216 | * 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] | 1217 | * |
| 1218 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1220 | 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] | 1221 | u_int64_t mask) |
| 1222 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1223 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1224 | struct snd_mask *maskp = constrs_mask(constrs, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | maskp->bits[0] &= (u_int32_t)mask; |
| 1226 | maskp->bits[1] &= (u_int32_t)(mask >> 32); |
| 1227 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ |
| 1228 | if (! maskp->bits[0] && ! maskp->bits[1]) |
| 1229 | return -EINVAL; |
| 1230 | return 0; |
| 1231 | } |
Mark Brown | 63a5d4c | 2014-02-20 12:13:52 +0900 | [diff] [blame] | 1232 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | |
| 1234 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1235 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1236 | * @runtime: PCM runtime instance |
| 1237 | * @var: hw_params variable to apply the integer constraint |
| 1238 | * |
| 1239 | * Apply the constraint of integer to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1240 | * |
| 1241 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1242 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1244 | 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] | 1245 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1246 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
| 1248 | } |
| 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 | } |
| 1275 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1276 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
| 1277 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1278 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
| 1279 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1281 | struct snd_pcm_hw_constraint_list *list = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
| 1283 | } |
| 1284 | |
| 1285 | |
| 1286 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1287 | * 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] | 1288 | * @runtime: PCM runtime instance |
| 1289 | * @cond: condition bits |
| 1290 | * @var: hw_params variable to apply the list constraint |
| 1291 | * @l: list |
| 1292 | * |
| 1293 | * Apply the list of constraints to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1294 | * |
| 1295 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1297 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | unsigned int cond, |
| 1299 | snd_pcm_hw_param_t var, |
Mark Brown | 1464189 | 2012-07-05 12:15:01 +0100 | [diff] [blame] | 1300 | const struct snd_pcm_hw_constraint_list *l) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | { |
| 1302 | return snd_pcm_hw_rule_add(runtime, cond, var, |
Mark Brown | 1464189 | 2012-07-05 12:15:01 +0100 | [diff] [blame] | 1303 | snd_pcm_hw_rule_list, (void *)l, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | var, -1); |
| 1305 | } |
| 1306 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1307 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
| 1308 | |
Peter Rosin | f66f898 | 2015-01-28 15:16:06 +0100 | [diff] [blame] | 1309 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
| 1310 | struct snd_pcm_hw_rule *rule) |
| 1311 | { |
| 1312 | struct snd_pcm_hw_constraint_ranges *r = rule->private; |
| 1313 | return snd_interval_ranges(hw_param_interval(params, rule->var), |
| 1314 | r->count, r->ranges, r->mask); |
| 1315 | } |
| 1316 | |
| 1317 | |
| 1318 | /** |
| 1319 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter |
| 1320 | * @runtime: PCM runtime instance |
| 1321 | * @cond: condition bits |
| 1322 | * @var: hw_params variable to apply the list of range constraints |
| 1323 | * @r: ranges |
| 1324 | * |
| 1325 | * Apply the list of range constraints to an interval parameter. |
| 1326 | * |
| 1327 | * Return: Zero if successful, or a negative error code on failure. |
| 1328 | */ |
| 1329 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, |
| 1330 | unsigned int cond, |
| 1331 | snd_pcm_hw_param_t var, |
| 1332 | const struct snd_pcm_hw_constraint_ranges *r) |
| 1333 | { |
| 1334 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1335 | snd_pcm_hw_rule_ranges, (void *)r, |
| 1336 | var, -1); |
| 1337 | } |
| 1338 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); |
| 1339 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1340 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
| 1341 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | { |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1343 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | unsigned int num = 0, den = 0; |
| 1345 | int err; |
| 1346 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), |
| 1347 | r->nrats, r->rats, &num, &den); |
| 1348 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { |
| 1349 | params->rate_num = num; |
| 1350 | params->rate_den = den; |
| 1351 | } |
| 1352 | return err; |
| 1353 | } |
| 1354 | |
| 1355 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1356 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1357 | * @runtime: PCM runtime instance |
| 1358 | * @cond: condition bits |
| 1359 | * @var: hw_params variable to apply the ratnums constraint |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1360 | * @r: struct snd_ratnums constriants |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1361 | * |
| 1362 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1364 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | unsigned int cond, |
| 1366 | snd_pcm_hw_param_t var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1367 | const struct snd_pcm_hw_constraint_ratnums *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | { |
| 1369 | return snd_pcm_hw_rule_add(runtime, cond, var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1370 | snd_pcm_hw_rule_ratnums, (void *)r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | var, -1); |
| 1372 | } |
| 1373 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1374 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
| 1375 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1376 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
| 1377 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | { |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1379 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | unsigned int num = 0, den = 0; |
| 1381 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), |
| 1382 | r->nrats, r->rats, &num, &den); |
| 1383 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { |
| 1384 | params->rate_num = num; |
| 1385 | params->rate_den = den; |
| 1386 | } |
| 1387 | return err; |
| 1388 | } |
| 1389 | |
| 1390 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1391 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1392 | * @runtime: PCM runtime instance |
| 1393 | * @cond: condition bits |
| 1394 | * @var: hw_params variable to apply the ratdens constraint |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1395 | * @r: struct snd_ratdens constriants |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1396 | * |
| 1397 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1399 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | unsigned int cond, |
| 1401 | snd_pcm_hw_param_t var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1402 | const struct snd_pcm_hw_constraint_ratdens *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | { |
| 1404 | return snd_pcm_hw_rule_add(runtime, cond, var, |
Lars-Peter Clausen | e5e113c | 2015-10-28 11:37:53 +0100 | [diff] [blame] | 1405 | snd_pcm_hw_rule_ratdens, (void *)r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | var, -1); |
| 1407 | } |
| 1408 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1409 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
| 1410 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1411 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
| 1412 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | { |
| 1414 | unsigned int l = (unsigned long) rule->private; |
| 1415 | int width = l & 0xffff; |
| 1416 | unsigned int msbits = l >> 16; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1417 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
Lars-Peter Clausen | 8ef9df5 | 2014-12-29 18:43:37 +0100 | [diff] [blame] | 1418 | |
| 1419 | if (!snd_interval_single(i)) |
| 1420 | return 0; |
| 1421 | |
| 1422 | if ((snd_interval_value(i) == width) || |
| 1423 | (width == 0 && snd_interval_value(i) > msbits)) |
Lars-Peter Clausen | 19f52fa | 2014-12-29 18:43:36 +0100 | [diff] [blame] | 1424 | params->msbits = min_not_zero(params->msbits, msbits); |
Lars-Peter Clausen | 8ef9df5 | 2014-12-29 18:43:37 +0100 | [diff] [blame] | 1425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | return 0; |
| 1427 | } |
| 1428 | |
| 1429 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1430 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1431 | * @runtime: PCM runtime instance |
| 1432 | * @cond: condition bits |
| 1433 | * @width: sample bits width |
| 1434 | * @msbits: msbits width |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1435 | * |
Lars-Peter Clausen | 8ef9df5 | 2014-12-29 18:43:37 +0100 | [diff] [blame] | 1436 | * This constraint will set the number of most significant bits (msbits) if a |
| 1437 | * sample format with the specified width has been select. If width is set to 0 |
| 1438 | * the msbits will be set for any sample format with a width larger than the |
| 1439 | * specified msbits. |
| 1440 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1441 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1443 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | unsigned int cond, |
| 1445 | unsigned int width, |
| 1446 | unsigned int msbits) |
| 1447 | { |
| 1448 | unsigned long l = (msbits << 16) | width; |
| 1449 | return snd_pcm_hw_rule_add(runtime, cond, -1, |
| 1450 | snd_pcm_hw_rule_msbits, |
| 1451 | (void*) l, |
| 1452 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| 1453 | } |
| 1454 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1455 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
| 1456 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1457 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
| 1458 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | { |
| 1460 | unsigned long step = (unsigned long) rule->private; |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1461 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | } |
| 1463 | |
| 1464 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1465 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1466 | * @runtime: PCM runtime instance |
| 1467 | * @cond: condition bits |
| 1468 | * @var: hw_params variable to apply the step constraint |
| 1469 | * @step: step size |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1470 | * |
| 1471 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1473 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | unsigned int cond, |
| 1475 | snd_pcm_hw_param_t var, |
| 1476 | unsigned long step) |
| 1477 | { |
| 1478 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1479 | snd_pcm_hw_rule_step, (void *) step, |
| 1480 | var, -1); |
| 1481 | } |
| 1482 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1483 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
| 1484 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1485 | 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] | 1486 | { |
Marcin Åšlusarz | 67c3931 | 2007-12-14 12:53:21 +0100 | [diff] [blame] | 1487 | static unsigned int pow2_sizes[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
| 1489 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, |
| 1490 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, |
| 1491 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 |
| 1492 | }; |
| 1493 | return snd_interval_list(hw_param_interval(params, rule->var), |
| 1494 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); |
| 1495 | } |
| 1496 | |
| 1497 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1498 | * 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] | 1499 | * @runtime: PCM runtime instance |
| 1500 | * @cond: condition bits |
| 1501 | * @var: hw_params variable to apply the power-of-2 constraint |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1502 | * |
| 1503 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1505 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | unsigned int cond, |
| 1507 | snd_pcm_hw_param_t var) |
| 1508 | { |
| 1509 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1510 | snd_pcm_hw_rule_pow2, NULL, |
| 1511 | var, -1); |
| 1512 | } |
| 1513 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1514 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
| 1515 | |
Clemens Ladisch | d5b702a | 2011-09-16 23:03:02 +0200 | [diff] [blame] | 1516 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
| 1517 | struct snd_pcm_hw_rule *rule) |
| 1518 | { |
| 1519 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; |
| 1520 | struct snd_interval *rate; |
| 1521 | |
| 1522 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| 1523 | return snd_interval_list(rate, 1, &base_rate, 0); |
| 1524 | } |
| 1525 | |
| 1526 | /** |
| 1527 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling |
| 1528 | * @runtime: PCM runtime instance |
| 1529 | * @base_rate: the rate at which the hardware does not resample |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1530 | * |
| 1531 | * Return: Zero if successful, or a negative error code on failure. |
Clemens Ladisch | d5b702a | 2011-09-16 23:03:02 +0200 | [diff] [blame] | 1532 | */ |
| 1533 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
| 1534 | unsigned int base_rate) |
| 1535 | { |
| 1536 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, |
| 1537 | SNDRV_PCM_HW_PARAM_RATE, |
| 1538 | snd_pcm_hw_rule_noresample_func, |
| 1539 | (void *)(uintptr_t)base_rate, |
| 1540 | SNDRV_PCM_HW_PARAM_RATE, -1); |
| 1541 | } |
| 1542 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); |
| 1543 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1544 | 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] | 1545 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | { |
| 1547 | if (hw_is_mask(var)) { |
| 1548 | snd_mask_any(hw_param_mask(params, var)); |
| 1549 | params->cmask |= 1 << var; |
| 1550 | params->rmask |= 1 << var; |
| 1551 | return; |
| 1552 | } |
| 1553 | if (hw_is_interval(var)) { |
| 1554 | snd_interval_any(hw_param_interval(params, var)); |
| 1555 | params->cmask |= 1 << var; |
| 1556 | params->rmask |= 1 << var; |
| 1557 | return; |
| 1558 | } |
| 1559 | snd_BUG(); |
| 1560 | } |
| 1561 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1562 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | { |
| 1564 | unsigned int k; |
| 1565 | memset(params, 0, sizeof(*params)); |
| 1566 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) |
| 1567 | _snd_pcm_hw_param_any(params, k); |
| 1568 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
| 1569 | _snd_pcm_hw_param_any(params, k); |
| 1570 | params->info = ~0U; |
| 1571 | } |
| 1572 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1573 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | |
| 1575 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1576 | * snd_pcm_hw_param_value - return @params field @var value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1577 | * @params: the hw_params instance |
| 1578 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1579 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1581 | * Return: The value for field @var if it's fixed in configuration space |
| 1582 | * defined by @params. -%EINVAL otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1584 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
| 1585 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | { |
| 1587 | if (hw_is_mask(var)) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1588 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | if (!snd_mask_single(mask)) |
| 1590 | return -EINVAL; |
| 1591 | if (dir) |
| 1592 | *dir = 0; |
| 1593 | return snd_mask_value(mask); |
| 1594 | } |
| 1595 | if (hw_is_interval(var)) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1596 | const struct snd_interval *i = hw_param_interval_c(params, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | if (!snd_interval_single(i)) |
| 1598 | return -EINVAL; |
| 1599 | if (dir) |
| 1600 | *dir = i->openmin; |
| 1601 | return snd_interval_value(i); |
| 1602 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | return -EINVAL; |
| 1604 | } |
| 1605 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1606 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1608 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | snd_pcm_hw_param_t var) |
| 1610 | { |
| 1611 | if (hw_is_mask(var)) { |
| 1612 | snd_mask_none(hw_param_mask(params, var)); |
| 1613 | params->cmask |= 1 << var; |
| 1614 | params->rmask |= 1 << var; |
| 1615 | } else if (hw_is_interval(var)) { |
| 1616 | snd_interval_none(hw_param_interval(params, var)); |
| 1617 | params->cmask |= 1 << var; |
| 1618 | params->rmask |= 1 << var; |
| 1619 | } else { |
| 1620 | snd_BUG(); |
| 1621 | } |
| 1622 | } |
| 1623 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1624 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1626 | 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] | 1627 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | { |
| 1629 | int changed; |
| 1630 | if (hw_is_mask(var)) |
| 1631 | changed = snd_mask_refine_first(hw_param_mask(params, var)); |
| 1632 | else if (hw_is_interval(var)) |
| 1633 | changed = snd_interval_refine_first(hw_param_interval(params, var)); |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1634 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | if (changed) { |
| 1637 | params->cmask |= 1 << var; |
| 1638 | params->rmask |= 1 << var; |
| 1639 | } |
| 1640 | return changed; |
| 1641 | } |
| 1642 | |
| 1643 | |
| 1644 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1645 | * snd_pcm_hw_param_first - refine config space and return minimum value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1646 | * @pcm: PCM instance |
| 1647 | * @params: the hw_params instance |
| 1648 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1649 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1651 | * Inside configuration space defined by @params remove from @var all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | * values > minimum. Reduce configuration space accordingly. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1653 | * |
| 1654 | * Return: The minimum, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1656 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
| 1657 | struct snd_pcm_hw_params *params, |
| 1658 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | { |
| 1660 | int changed = _snd_pcm_hw_param_first(params, var); |
| 1661 | if (changed < 0) |
| 1662 | return changed; |
| 1663 | if (params->rmask) { |
| 1664 | int err = snd_pcm_hw_refine(pcm, params); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1665 | if (snd_BUG_ON(err < 0)) |
| 1666 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | } |
| 1668 | return snd_pcm_hw_param_value(params, var, dir); |
| 1669 | } |
| 1670 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1671 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
| 1672 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1673 | 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] | 1674 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | { |
| 1676 | int changed; |
| 1677 | if (hw_is_mask(var)) |
| 1678 | changed = snd_mask_refine_last(hw_param_mask(params, var)); |
| 1679 | else if (hw_is_interval(var)) |
| 1680 | changed = snd_interval_refine_last(hw_param_interval(params, var)); |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1681 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | if (changed) { |
| 1684 | params->cmask |= 1 << var; |
| 1685 | params->rmask |= 1 << var; |
| 1686 | } |
| 1687 | return changed; |
| 1688 | } |
| 1689 | |
| 1690 | |
| 1691 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1692 | * snd_pcm_hw_param_last - refine config space and return maximum value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1693 | * @pcm: PCM instance |
| 1694 | * @params: the hw_params instance |
| 1695 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1696 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1698 | * Inside configuration space defined by @params remove from @var all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | * values < maximum. Reduce configuration space accordingly. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1700 | * |
| 1701 | * Return: The maximum, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1703 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
| 1704 | struct snd_pcm_hw_params *params, |
| 1705 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | { |
| 1707 | int changed = _snd_pcm_hw_param_last(params, var); |
| 1708 | if (changed < 0) |
| 1709 | return changed; |
| 1710 | if (params->rmask) { |
| 1711 | int err = snd_pcm_hw_refine(pcm, params); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1712 | if (snd_BUG_ON(err < 0)) |
| 1713 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | } |
| 1715 | return snd_pcm_hw_param_value(params, var, dir); |
| 1716 | } |
| 1717 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1718 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | |
| 1720 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1721 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1722 | * @pcm: PCM instance |
| 1723 | * @params: the hw_params instance |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1725 | * Choose one configuration from configuration space defined by @params. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | * The configuration chosen is that obtained fixing in this order: |
| 1727 | * first access, first format, first subformat, min channels, |
| 1728 | * min rate, min period time, max buffer size, min tick time |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1729 | * |
| 1730 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | */ |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1732 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
| 1733 | struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | { |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1735 | static int vars[] = { |
| 1736 | SNDRV_PCM_HW_PARAM_ACCESS, |
| 1737 | SNDRV_PCM_HW_PARAM_FORMAT, |
| 1738 | SNDRV_PCM_HW_PARAM_SUBFORMAT, |
| 1739 | SNDRV_PCM_HW_PARAM_CHANNELS, |
| 1740 | SNDRV_PCM_HW_PARAM_RATE, |
| 1741 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, |
| 1742 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| 1743 | SNDRV_PCM_HW_PARAM_TICK_TIME, |
| 1744 | -1 |
| 1745 | }; |
| 1746 | int err, *v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1748 | for (v = vars; *v != -1; v++) { |
| 1749 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) |
| 1750 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); |
| 1751 | else |
| 1752 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1753 | if (snd_BUG_ON(err < 0)) |
| 1754 | return err; |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1755 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | return 0; |
| 1757 | } |
| 1758 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1759 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | void *arg) |
| 1761 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1762 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | unsigned long flags; |
| 1764 | snd_pcm_stream_lock_irqsave(substream, flags); |
| 1765 | if (snd_pcm_running(substream) && |
| 1766 | snd_pcm_update_hw_ptr(substream) >= 0) |
| 1767 | runtime->status->hw_ptr %= runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 1768 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | runtime->status->hw_ptr = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 1770 | runtime->hw_ptr_wrap = 0; |
| 1771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
| 1773 | return 0; |
| 1774 | } |
| 1775 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1776 | 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] | 1777 | void *arg) |
| 1778 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1779 | struct snd_pcm_channel_info *info = arg; |
| 1780 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | int width; |
| 1782 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { |
| 1783 | info->offset = -1; |
| 1784 | return 0; |
| 1785 | } |
| 1786 | width = snd_pcm_format_physical_width(runtime->format); |
| 1787 | if (width < 0) |
| 1788 | return width; |
| 1789 | info->offset = 0; |
| 1790 | switch (runtime->access) { |
| 1791 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: |
| 1792 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: |
| 1793 | info->first = info->channel * width; |
| 1794 | info->step = runtime->channels * width; |
| 1795 | break; |
| 1796 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: |
| 1797 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: |
| 1798 | { |
| 1799 | size_t size = runtime->dma_bytes / runtime->channels; |
| 1800 | info->first = info->channel * size * 8; |
| 1801 | info->step = width; |
| 1802 | break; |
| 1803 | } |
| 1804 | default: |
| 1805 | snd_BUG(); |
| 1806 | break; |
| 1807 | } |
| 1808 | return 0; |
| 1809 | } |
| 1810 | |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1811 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
| 1812 | void *arg) |
| 1813 | { |
| 1814 | struct snd_pcm_hw_params *params = arg; |
| 1815 | snd_pcm_format_t format; |
Clemens Ladisch | a9960e6 | 2014-09-21 22:50:57 +0200 | [diff] [blame] | 1816 | int channels; |
| 1817 | ssize_t frame_size; |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1818 | |
| 1819 | params->fifo_size = substream->runtime->hw.fifo_size; |
| 1820 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { |
| 1821 | format = params_format(params); |
| 1822 | channels = params_channels(params); |
Clemens Ladisch | a9960e6 | 2014-09-21 22:50:57 +0200 | [diff] [blame] | 1823 | frame_size = snd_pcm_format_size(format, channels); |
| 1824 | if (frame_size > 0) |
| 1825 | params->fifo_size /= (unsigned)frame_size; |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1826 | } |
| 1827 | return 0; |
| 1828 | } |
| 1829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | /** |
| 1831 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback |
| 1832 | * @substream: the pcm substream instance |
| 1833 | * @cmd: ioctl command |
| 1834 | * @arg: ioctl argument |
| 1835 | * |
| 1836 | * Processes the generic ioctl commands for PCM. |
| 1837 | * Can be passed as the ioctl callback for PCM ops. |
| 1838 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1839 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1841 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | unsigned int cmd, void *arg) |
| 1843 | { |
| 1844 | switch (cmd) { |
| 1845 | case SNDRV_PCM_IOCTL1_INFO: |
| 1846 | return 0; |
| 1847 | case SNDRV_PCM_IOCTL1_RESET: |
| 1848 | return snd_pcm_lib_ioctl_reset(substream, arg); |
| 1849 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: |
| 1850 | return snd_pcm_lib_ioctl_channel_info(substream, arg); |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1851 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
| 1852 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | } |
| 1854 | return -ENXIO; |
| 1855 | } |
| 1856 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1857 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
| 1858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | /** |
| 1860 | * snd_pcm_period_elapsed - update the pcm status for the next period |
| 1861 | * @substream: the pcm substream instance |
| 1862 | * |
| 1863 | * This function is called from the interrupt handler when the |
| 1864 | * PCM has processed the period size. It will update the current |
Takashi Iwai | 31e8960 | 2008-01-08 18:09:57 +0100 | [diff] [blame] | 1865 | * pointer, wake up sleepers, etc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | * |
| 1867 | * Even if more than one periods have elapsed since the last call, you |
| 1868 | * have to call this only once. |
| 1869 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1870 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1872 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | unsigned long flags; |
| 1874 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1875 | if (PCM_RUNTIME_CHECK(substream)) |
| 1876 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | snd_pcm_stream_lock_irqsave(substream, flags); |
| 1880 | if (!snd_pcm_running(substream) || |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 1881 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | goto _end; |
| 1883 | |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1884 | #ifdef CONFIG_SND_PCM_TIMER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | if (substream->timer_running) |
| 1886 | snd_timer_interrupt(substream->timer, 1); |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1887 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | _end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
Takashi Iwai | 3aa02cb | 2016-04-14 18:02:37 +0200 | [diff] [blame] | 1890 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | } |
| 1892 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1893 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
| 1894 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1895 | /* |
| 1896 | * Wait until avail_min data becomes available |
| 1897 | * Returns a negative error code if any error occurs during operation. |
| 1898 | * The available space is stored on availp. When err = 0 and avail = 0 |
| 1899 | * on the capture stream, it indicates the stream is in DRAINING state. |
| 1900 | */ |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 1901 | static int wait_for_avail(struct snd_pcm_substream *substream, |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1902 | snd_pcm_uframes_t *availp) |
| 1903 | { |
| 1904 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 1905 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| 1906 | wait_queue_t wait; |
| 1907 | int err = 0; |
| 1908 | snd_pcm_uframes_t avail = 0; |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1909 | long wait_time, tout; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1910 | |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1911 | init_waitqueue_entry(&wait, current); |
| 1912 | set_current_state(TASK_INTERRUPTIBLE); |
| 1913 | add_wait_queue(&runtime->tsleep, &wait); |
| 1914 | |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1915 | if (runtime->no_period_wakeup) |
| 1916 | wait_time = MAX_SCHEDULE_TIMEOUT; |
| 1917 | else { |
| 1918 | wait_time = 10; |
| 1919 | if (runtime->rate) { |
| 1920 | long t = runtime->period_size * 2 / runtime->rate; |
| 1921 | wait_time = max(t, wait_time); |
| 1922 | } |
| 1923 | wait_time = msecs_to_jiffies(wait_time * 1000); |
| 1924 | } |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1925 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1926 | for (;;) { |
| 1927 | if (signal_pending(current)) { |
| 1928 | err = -ERESTARTSYS; |
| 1929 | break; |
| 1930 | } |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1931 | |
| 1932 | /* |
| 1933 | * We need to check if space became available already |
| 1934 | * (and thus the wakeup happened already) first to close |
| 1935 | * the race of space already having become available. |
| 1936 | * This check must happen after been added to the waitqueue |
| 1937 | * and having current state be INTERRUPTIBLE. |
| 1938 | */ |
| 1939 | if (is_playback) |
| 1940 | avail = snd_pcm_playback_avail(runtime); |
| 1941 | else |
| 1942 | avail = snd_pcm_capture_avail(runtime); |
| 1943 | if (avail >= runtime->twake) |
| 1944 | break; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1945 | snd_pcm_stream_unlock_irq(substream); |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1946 | |
| 1947 | tout = schedule_timeout(wait_time); |
| 1948 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1949 | snd_pcm_stream_lock_irq(substream); |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1950 | set_current_state(TASK_INTERRUPTIBLE); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1951 | switch (runtime->status->state) { |
| 1952 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1953 | err = -ESTRPIPE; |
| 1954 | goto _endloop; |
| 1955 | case SNDRV_PCM_STATE_XRUN: |
| 1956 | err = -EPIPE; |
| 1957 | goto _endloop; |
| 1958 | case SNDRV_PCM_STATE_DRAINING: |
| 1959 | if (is_playback) |
| 1960 | err = -EPIPE; |
| 1961 | else |
| 1962 | avail = 0; /* indicate draining */ |
| 1963 | goto _endloop; |
| 1964 | case SNDRV_PCM_STATE_OPEN: |
| 1965 | case SNDRV_PCM_STATE_SETUP: |
| 1966 | case SNDRV_PCM_STATE_DISCONNECTED: |
| 1967 | err = -EBADFD; |
| 1968 | goto _endloop; |
JongHo Kim | ed697e1 | 2013-12-17 23:02:24 +0900 | [diff] [blame] | 1969 | case SNDRV_PCM_STATE_PAUSED: |
| 1970 | continue; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1971 | } |
| 1972 | if (!tout) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 1973 | pcm_dbg(substream->pcm, |
| 1974 | "%s write error (DMA or IRQ trouble?)\n", |
| 1975 | is_playback ? "playback" : "capture"); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1976 | err = -EIO; |
| 1977 | break; |
| 1978 | } |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1979 | } |
| 1980 | _endloop: |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1981 | set_current_state(TASK_RUNNING); |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1982 | remove_wait_queue(&runtime->tsleep, &wait); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1983 | *availp = avail; |
| 1984 | return err; |
| 1985 | } |
| 1986 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1987 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | unsigned int hwoff, |
| 1989 | unsigned long data, unsigned int off, |
| 1990 | snd_pcm_uframes_t frames) |
| 1991 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1992 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | int err; |
| 1994 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); |
| 1995 | if (substream->ops->copy) { |
| 1996 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) |
| 1997 | return err; |
| 1998 | } else { |
| 1999 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
| 2001 | return -EFAULT; |
| 2002 | } |
| 2003 | return 0; |
| 2004 | } |
| 2005 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2006 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | unsigned long data, unsigned int off, |
| 2008 | snd_pcm_uframes_t size); |
| 2009 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2010 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | unsigned long data, |
| 2012 | snd_pcm_uframes_t size, |
| 2013 | int nonblock, |
| 2014 | transfer_f transfer) |
| 2015 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2016 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | snd_pcm_uframes_t xfer = 0; |
| 2018 | snd_pcm_uframes_t offset = 0; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2019 | snd_pcm_uframes_t avail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | int err = 0; |
| 2021 | |
| 2022 | if (size == 0) |
| 2023 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | |
| 2025 | snd_pcm_stream_lock_irq(substream); |
| 2026 | switch (runtime->status->state) { |
| 2027 | case SNDRV_PCM_STATE_PREPARED: |
| 2028 | case SNDRV_PCM_STATE_RUNNING: |
| 2029 | case SNDRV_PCM_STATE_PAUSED: |
| 2030 | break; |
| 2031 | case SNDRV_PCM_STATE_XRUN: |
| 2032 | err = -EPIPE; |
| 2033 | goto _end_unlock; |
| 2034 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2035 | err = -ESTRPIPE; |
| 2036 | goto _end_unlock; |
| 2037 | default: |
| 2038 | err = -EBADFD; |
| 2039 | goto _end_unlock; |
| 2040 | } |
| 2041 | |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 2042 | runtime->twake = runtime->control->avail_min ? : 1; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2043 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
| 2044 | snd_pcm_update_hw_ptr(substream); |
| 2045 | avail = snd_pcm_playback_avail(runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | while (size > 0) { |
| 2047 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | snd_pcm_uframes_t cont; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2049 | if (!avail) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | if (nonblock) { |
| 2051 | err = -EAGAIN; |
| 2052 | goto _end_unlock; |
| 2053 | } |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 2054 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
| 2055 | runtime->control->avail_min ? : 1); |
| 2056 | err = wait_for_avail(substream, &avail); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2057 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | frames = size > avail ? avail : size; |
| 2061 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; |
| 2062 | if (frames > cont) |
| 2063 | frames = cont; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2064 | if (snd_BUG_ON(!frames)) { |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 2065 | runtime->twake = 0; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2066 | snd_pcm_stream_unlock_irq(substream); |
| 2067 | return -EINVAL; |
| 2068 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | appl_ptr = runtime->control->appl_ptr; |
| 2070 | appl_ofs = appl_ptr % runtime->buffer_size; |
| 2071 | snd_pcm_stream_unlock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2072 | err = transfer(substream, appl_ofs, data, offset, frames); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | snd_pcm_stream_lock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2074 | if (err < 0) |
| 2075 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | switch (runtime->status->state) { |
| 2077 | case SNDRV_PCM_STATE_XRUN: |
| 2078 | err = -EPIPE; |
| 2079 | goto _end_unlock; |
| 2080 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2081 | err = -ESTRPIPE; |
| 2082 | goto _end_unlock; |
| 2083 | default: |
| 2084 | break; |
| 2085 | } |
| 2086 | appl_ptr += frames; |
| 2087 | if (appl_ptr >= runtime->boundary) |
| 2088 | appl_ptr -= runtime->boundary; |
| 2089 | runtime->control->appl_ptr = appl_ptr; |
| 2090 | if (substream->ops->ack) |
| 2091 | substream->ops->ack(substream); |
| 2092 | |
| 2093 | offset += frames; |
| 2094 | size -= frames; |
| 2095 | xfer += frames; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2096 | avail -= frames; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && |
| 2098 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { |
| 2099 | err = snd_pcm_start(substream); |
| 2100 | if (err < 0) |
| 2101 | goto _end_unlock; |
| 2102 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | } |
| 2104 | _end_unlock: |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 2105 | runtime->twake = 0; |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2106 | if (xfer > 0 && err >= 0) |
| 2107 | snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
| 2110 | } |
| 2111 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2112 | /* sanity-check for read/write methods */ |
| 2113 | static int pcm_sanity_check(struct snd_pcm_substream *substream) |
| 2114 | { |
| 2115 | struct snd_pcm_runtime *runtime; |
| 2116 | if (PCM_RUNTIME_CHECK(substream)) |
| 2117 | return -ENXIO; |
| 2118 | runtime = substream->runtime; |
| 2119 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
| 2120 | return -EINVAL; |
| 2121 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 2122 | return -EBADFD; |
| 2123 | return 0; |
| 2124 | } |
| 2125 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2126 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2128 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2130 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2132 | err = pcm_sanity_check(substream); |
| 2133 | if (err < 0) |
| 2134 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | runtime = substream->runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2136 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | |
| 2138 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && |
| 2139 | runtime->channels > 1) |
| 2140 | return -EINVAL; |
| 2141 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, |
| 2142 | snd_pcm_lib_write_transfer); |
| 2143 | } |
| 2144 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2145 | EXPORT_SYMBOL(snd_pcm_lib_write); |
| 2146 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2147 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | unsigned int hwoff, |
| 2149 | unsigned long data, unsigned int off, |
| 2150 | snd_pcm_uframes_t frames) |
| 2151 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2152 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | int err; |
| 2154 | void __user **bufs = (void __user **)data; |
| 2155 | int channels = runtime->channels; |
| 2156 | int c; |
| 2157 | if (substream->ops->copy) { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2158 | if (snd_BUG_ON(!substream->ops->silence)) |
| 2159 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2160 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2161 | if (*bufs == NULL) { |
| 2162 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) |
| 2163 | return err; |
| 2164 | } else { |
| 2165 | char __user *buf = *bufs + samples_to_bytes(runtime, off); |
| 2166 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) |
| 2167 | return err; |
| 2168 | } |
| 2169 | } |
| 2170 | } else { |
| 2171 | /* default transfer behaviour */ |
| 2172 | size_t dma_csize = runtime->dma_bytes / channels; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2174 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); |
| 2175 | if (*bufs == NULL) { |
| 2176 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); |
| 2177 | } else { |
| 2178 | char __user *buf = *bufs + samples_to_bytes(runtime, off); |
| 2179 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) |
| 2180 | return -EFAULT; |
| 2181 | } |
| 2182 | } |
| 2183 | } |
| 2184 | return 0; |
| 2185 | } |
| 2186 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2187 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | void __user **bufs, |
| 2189 | snd_pcm_uframes_t frames) |
| 2190 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2191 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2193 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2195 | err = pcm_sanity_check(substream); |
| 2196 | if (err < 0) |
| 2197 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | runtime = substream->runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2199 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | |
| 2201 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
| 2202 | return -EINVAL; |
| 2203 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, |
| 2204 | nonblock, snd_pcm_lib_writev_transfer); |
| 2205 | } |
| 2206 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2207 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
| 2208 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2209 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | unsigned int hwoff, |
| 2211 | unsigned long data, unsigned int off, |
| 2212 | snd_pcm_uframes_t frames) |
| 2213 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2214 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | int err; |
| 2216 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); |
| 2217 | if (substream->ops->copy) { |
| 2218 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) |
| 2219 | return err; |
| 2220 | } else { |
| 2221 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
| 2223 | return -EFAULT; |
| 2224 | } |
| 2225 | return 0; |
| 2226 | } |
| 2227 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2228 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | unsigned long data, |
| 2230 | snd_pcm_uframes_t size, |
| 2231 | int nonblock, |
| 2232 | transfer_f transfer) |
| 2233 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2234 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | snd_pcm_uframes_t xfer = 0; |
| 2236 | snd_pcm_uframes_t offset = 0; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2237 | snd_pcm_uframes_t avail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | int err = 0; |
| 2239 | |
| 2240 | if (size == 0) |
| 2241 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | |
| 2243 | snd_pcm_stream_lock_irq(substream); |
| 2244 | switch (runtime->status->state) { |
| 2245 | case SNDRV_PCM_STATE_PREPARED: |
| 2246 | if (size >= runtime->start_threshold) { |
| 2247 | err = snd_pcm_start(substream); |
| 2248 | if (err < 0) |
| 2249 | goto _end_unlock; |
| 2250 | } |
| 2251 | break; |
| 2252 | case SNDRV_PCM_STATE_DRAINING: |
| 2253 | case SNDRV_PCM_STATE_RUNNING: |
| 2254 | case SNDRV_PCM_STATE_PAUSED: |
| 2255 | break; |
| 2256 | case SNDRV_PCM_STATE_XRUN: |
| 2257 | err = -EPIPE; |
| 2258 | goto _end_unlock; |
| 2259 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2260 | err = -ESTRPIPE; |
| 2261 | goto _end_unlock; |
| 2262 | default: |
| 2263 | err = -EBADFD; |
| 2264 | goto _end_unlock; |
| 2265 | } |
| 2266 | |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 2267 | runtime->twake = runtime->control->avail_min ? : 1; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2268 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
| 2269 | snd_pcm_update_hw_ptr(substream); |
| 2270 | avail = snd_pcm_capture_avail(runtime); |
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) { |
| 2275 | if (runtime->status->state == |
| 2276 | SNDRV_PCM_STATE_DRAINING) { |
| 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; |
| 2293 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; |
| 2294 | if (frames > cont) |
| 2295 | frames = cont; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2296 | if (snd_BUG_ON(!frames)) { |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 2297 | runtime->twake = 0; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2298 | snd_pcm_stream_unlock_irq(substream); |
| 2299 | return -EINVAL; |
| 2300 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | appl_ptr = runtime->control->appl_ptr; |
| 2302 | appl_ofs = appl_ptr % runtime->buffer_size; |
| 2303 | snd_pcm_stream_unlock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2304 | err = transfer(substream, appl_ofs, data, offset, frames); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | snd_pcm_stream_lock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2306 | if (err < 0) |
| 2307 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | switch (runtime->status->state) { |
| 2309 | case SNDRV_PCM_STATE_XRUN: |
| 2310 | err = -EPIPE; |
| 2311 | goto _end_unlock; |
| 2312 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2313 | err = -ESTRPIPE; |
| 2314 | goto _end_unlock; |
| 2315 | default: |
| 2316 | break; |
| 2317 | } |
| 2318 | appl_ptr += frames; |
| 2319 | if (appl_ptr >= runtime->boundary) |
| 2320 | appl_ptr -= runtime->boundary; |
| 2321 | runtime->control->appl_ptr = appl_ptr; |
| 2322 | if (substream->ops->ack) |
| 2323 | substream->ops->ack(substream); |
| 2324 | |
| 2325 | offset += frames; |
| 2326 | size -= frames; |
| 2327 | xfer += frames; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2328 | avail -= frames; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | } |
| 2330 | _end_unlock: |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 2331 | runtime->twake = 0; |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2332 | if (xfer > 0 && err >= 0) |
| 2333 | snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2335 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
| 2336 | } |
| 2337 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2338 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2340 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2342 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2344 | err = pcm_sanity_check(substream); |
| 2345 | if (err < 0) |
| 2346 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | runtime = substream->runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2348 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2349 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
| 2350 | return -EINVAL; |
| 2351 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); |
| 2352 | } |
| 2353 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2354 | EXPORT_SYMBOL(snd_pcm_lib_read); |
| 2355 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2356 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | unsigned int hwoff, |
| 2358 | unsigned long data, unsigned int off, |
| 2359 | snd_pcm_uframes_t frames) |
| 2360 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2361 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | int err; |
| 2363 | void __user **bufs = (void __user **)data; |
| 2364 | int channels = runtime->channels; |
| 2365 | int c; |
| 2366 | if (substream->ops->copy) { |
| 2367 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2368 | char __user *buf; |
| 2369 | if (*bufs == NULL) |
| 2370 | continue; |
| 2371 | buf = *bufs + samples_to_bytes(runtime, off); |
| 2372 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) |
| 2373 | return err; |
| 2374 | } |
| 2375 | } else { |
| 2376 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2378 | char *hwbuf; |
| 2379 | char __user *buf; |
| 2380 | if (*bufs == NULL) |
| 2381 | continue; |
| 2382 | |
| 2383 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); |
| 2384 | buf = *bufs + samples_to_bytes(runtime, off); |
| 2385 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) |
| 2386 | return -EFAULT; |
| 2387 | } |
| 2388 | } |
| 2389 | return 0; |
| 2390 | } |
| 2391 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2392 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | void __user **bufs, |
| 2394 | snd_pcm_uframes_t frames) |
| 2395 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2396 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2398 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2400 | err = pcm_sanity_check(substream); |
| 2401 | if (err < 0) |
| 2402 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 2405 | return -EBADFD; |
| 2406 | |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2407 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
| 2409 | return -EINVAL; |
| 2410 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); |
| 2411 | } |
| 2412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | EXPORT_SYMBOL(snd_pcm_lib_readv); |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2414 | |
| 2415 | /* |
| 2416 | * standard channel mapping helpers |
| 2417 | */ |
| 2418 | |
| 2419 | /* default channel maps for multi-channel playbacks, up to 8 channels */ |
| 2420 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { |
| 2421 | { .channels = 1, |
Takashi Iwai | 5efbc26 | 2012-09-13 14:48:46 +0200 | [diff] [blame] | 2422 | .map = { SNDRV_CHMAP_MONO } }, |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2423 | { .channels = 2, |
| 2424 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, |
| 2425 | { .channels = 4, |
| 2426 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2427 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2428 | { .channels = 6, |
| 2429 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2430 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2431 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, |
| 2432 | { .channels = 8, |
| 2433 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2434 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2435 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2436 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, |
| 2437 | { } |
| 2438 | }; |
| 2439 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); |
| 2440 | |
| 2441 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ |
| 2442 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { |
| 2443 | { .channels = 1, |
Takashi Iwai | 5efbc26 | 2012-09-13 14:48:46 +0200 | [diff] [blame] | 2444 | .map = { SNDRV_CHMAP_MONO } }, |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2445 | { .channels = 2, |
| 2446 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, |
| 2447 | { .channels = 4, |
| 2448 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2449 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2450 | { .channels = 6, |
| 2451 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2452 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2453 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2454 | { .channels = 8, |
| 2455 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2456 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2457 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2458 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, |
| 2459 | { } |
| 2460 | }; |
| 2461 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); |
| 2462 | |
| 2463 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) |
| 2464 | { |
| 2465 | if (ch > info->max_channels) |
| 2466 | return false; |
| 2467 | return !info->channel_mask || (info->channel_mask & (1U << ch)); |
| 2468 | } |
| 2469 | |
| 2470 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, |
| 2471 | struct snd_ctl_elem_info *uinfo) |
| 2472 | { |
| 2473 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2474 | |
| 2475 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 2476 | uinfo->count = 0; |
| 2477 | uinfo->count = info->max_channels; |
| 2478 | uinfo->value.integer.min = 0; |
| 2479 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; |
| 2480 | return 0; |
| 2481 | } |
| 2482 | |
| 2483 | /* get callback for channel map ctl element |
| 2484 | * stores the channel position firstly matching with the current channels |
| 2485 | */ |
| 2486 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, |
| 2487 | struct snd_ctl_elem_value *ucontrol) |
| 2488 | { |
| 2489 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2490 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); |
| 2491 | struct snd_pcm_substream *substream; |
| 2492 | const struct snd_pcm_chmap_elem *map; |
| 2493 | |
| 2494 | if (snd_BUG_ON(!info->chmap)) |
| 2495 | return -EINVAL; |
| 2496 | substream = snd_pcm_chmap_substream(info, idx); |
| 2497 | if (!substream) |
| 2498 | return -ENODEV; |
| 2499 | memset(ucontrol->value.integer.value, 0, |
| 2500 | sizeof(ucontrol->value.integer.value)); |
| 2501 | if (!substream->runtime) |
| 2502 | return 0; /* no channels set */ |
| 2503 | for (map = info->chmap; map->channels; map++) { |
| 2504 | int i; |
| 2505 | if (map->channels == substream->runtime->channels && |
| 2506 | valid_chmap_channels(info, map->channels)) { |
| 2507 | for (i = 0; i < map->channels; i++) |
| 2508 | ucontrol->value.integer.value[i] = map->map[i]; |
| 2509 | return 0; |
| 2510 | } |
| 2511 | } |
| 2512 | return -EINVAL; |
| 2513 | } |
| 2514 | |
| 2515 | /* tlv callback for channel map ctl element |
| 2516 | * expands the pre-defined channel maps in a form of TLV |
| 2517 | */ |
| 2518 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, |
| 2519 | unsigned int size, unsigned int __user *tlv) |
| 2520 | { |
| 2521 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2522 | const struct snd_pcm_chmap_elem *map; |
| 2523 | unsigned int __user *dst; |
| 2524 | int c, count = 0; |
| 2525 | |
| 2526 | if (snd_BUG_ON(!info->chmap)) |
| 2527 | return -EINVAL; |
| 2528 | if (size < 8) |
| 2529 | return -ENOMEM; |
| 2530 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) |
| 2531 | return -EFAULT; |
| 2532 | size -= 8; |
| 2533 | dst = tlv + 2; |
| 2534 | for (map = info->chmap; map->channels; map++) { |
| 2535 | int chs_bytes = map->channels * 4; |
| 2536 | if (!valid_chmap_channels(info, map->channels)) |
| 2537 | continue; |
| 2538 | if (size < 8) |
| 2539 | return -ENOMEM; |
| 2540 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || |
| 2541 | put_user(chs_bytes, dst + 1)) |
| 2542 | return -EFAULT; |
| 2543 | dst += 2; |
| 2544 | size -= 8; |
| 2545 | count += 8; |
| 2546 | if (size < chs_bytes) |
| 2547 | return -ENOMEM; |
| 2548 | size -= chs_bytes; |
| 2549 | count += chs_bytes; |
| 2550 | for (c = 0; c < map->channels; c++) { |
| 2551 | if (put_user(map->map[c], dst)) |
| 2552 | return -EFAULT; |
| 2553 | dst++; |
| 2554 | } |
| 2555 | } |
| 2556 | if (put_user(count, tlv + 1)) |
| 2557 | return -EFAULT; |
| 2558 | return 0; |
| 2559 | } |
| 2560 | |
| 2561 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) |
| 2562 | { |
| 2563 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2564 | info->pcm->streams[info->stream].chmap_kctl = NULL; |
| 2565 | kfree(info); |
| 2566 | } |
| 2567 | |
| 2568 | /** |
| 2569 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements |
| 2570 | * @pcm: the assigned PCM instance |
| 2571 | * @stream: stream direction |
| 2572 | * @chmap: channel map elements (for query) |
| 2573 | * @max_channels: the max number of channels for the stream |
| 2574 | * @private_value: the value passed to each kcontrol's private_value field |
| 2575 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL |
| 2576 | * |
| 2577 | * Create channel-mapping control elements assigned to the given PCM stream(s). |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 2578 | * Return: Zero if successful, or a negative error value. |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2579 | */ |
| 2580 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, |
| 2581 | const struct snd_pcm_chmap_elem *chmap, |
| 2582 | int max_channels, |
| 2583 | unsigned long private_value, |
| 2584 | struct snd_pcm_chmap **info_ret) |
| 2585 | { |
| 2586 | struct snd_pcm_chmap *info; |
| 2587 | struct snd_kcontrol_new knew = { |
| 2588 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, |
| 2589 | .access = SNDRV_CTL_ELEM_ACCESS_READ | |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2590 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
| 2591 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, |
| 2592 | .info = pcm_chmap_ctl_info, |
| 2593 | .get = pcm_chmap_ctl_get, |
| 2594 | .tlv.c = pcm_chmap_ctl_tlv, |
| 2595 | }; |
| 2596 | int err; |
| 2597 | |
Takashi Iwai | 8d879be | 2016-05-10 16:07:40 +0200 | [diff] [blame] | 2598 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
| 2599 | return -EBUSY; |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2600 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
| 2601 | if (!info) |
| 2602 | return -ENOMEM; |
| 2603 | info->pcm = pcm; |
| 2604 | info->stream = stream; |
| 2605 | info->chmap = chmap; |
| 2606 | info->max_channels = max_channels; |
| 2607 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 2608 | knew.name = "Playback Channel Map"; |
| 2609 | else |
| 2610 | knew.name = "Capture Channel Map"; |
| 2611 | knew.device = pcm->device; |
| 2612 | knew.count = pcm->streams[stream].substream_count; |
| 2613 | knew.private_value = private_value; |
| 2614 | info->kctl = snd_ctl_new1(&knew, info); |
| 2615 | if (!info->kctl) { |
| 2616 | kfree(info); |
| 2617 | return -ENOMEM; |
| 2618 | } |
| 2619 | info->kctl->private_free = pcm_chmap_ctl_private_free; |
| 2620 | err = snd_ctl_add(pcm->card, info->kctl); |
| 2621 | if (err < 0) |
| 2622 | return err; |
| 2623 | pcm->streams[stream].chmap_kctl = info->kctl; |
| 2624 | if (info_ret) |
| 2625 | *info_ret = info; |
| 2626 | return 0; |
| 2627 | } |
| 2628 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |