| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * compress_offload.h - compress offload header definations |
| * |
| * Copyright (C) 2011 Intel Corporation |
| * Authors: Vinod Koul <vinod.koul@linux.intel.com> |
| * Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| */ |
| #ifndef __COMPRESS_OFFLOAD_H |
| #define __COMPRESS_OFFLOAD_H |
| |
| #include <linux/types.h> |
| #include <sound/asound.h> |
| #include <sound/compress_params.h> |
| |
| |
| #define SNDRV_COMPRESS_VERSION SNDRV_PROTOCOL_VERSION(0, 2, 0) |
| /** |
| * struct snd_compressed_buffer - compressed buffer |
| * @fragment_size: size of buffer fragment in bytes |
| * @fragments: number of such fragments |
| */ |
| struct snd_compressed_buffer { |
| __u32 fragment_size; |
| __u32 fragments; |
| } __attribute__((packed, aligned(4))); |
| |
| /** |
| * struct snd_compr_params - compressed stream params |
| * @buffer: buffer description |
| * @codec: codec parameters |
| * @no_wake_mode: dont wake on fragment elapsed |
| */ |
| struct snd_compr_params { |
| struct snd_compressed_buffer buffer; |
| struct snd_codec codec; |
| __u8 no_wake_mode; |
| } __attribute__((packed, aligned(4))); |
| |
| /** |
| * struct snd_compr_tstamp - timestamp descriptor |
| * @byte_offset: Byte offset in ring buffer to DSP |
| * @copied_total: Total number of bytes copied from/to ring buffer to/by DSP |
| * @pcm_frames: Frames decoded or encoded by DSP. This field will evolve by |
| * large steps and should only be used to monitor encoding/decoding |
| * progress. It shall not be used for timing estimates. |
| * @pcm_io_frames: Frames rendered or received by DSP into a mixer or an audio |
| * output/input. This field should be used for A/V sync or time estimates. |
| * @sampling_rate: sampling rate of audio |
| */ |
| struct snd_compr_tstamp { |
| __u32 byte_offset; |
| __u32 copied_total; |
| __u32 pcm_frames; |
| __u32 pcm_io_frames; |
| __u32 sampling_rate; |
| } __attribute__((packed, aligned(4))); |
| |
| /** |
| * struct snd_compr_avail - avail descriptor |
| * @avail: Number of bytes available in ring buffer for writing/reading |
| * @tstamp: timestamp information |
| */ |
| struct snd_compr_avail { |
| __u64 avail; |
| struct snd_compr_tstamp tstamp; |
| } __attribute__((packed, aligned(4))); |
| |
| enum snd_compr_direction { |
| SND_COMPRESS_PLAYBACK = 0, |
| SND_COMPRESS_CAPTURE |
| }; |
| |
| /** |
| * struct snd_compr_caps - caps descriptor |
| * @codecs: pointer to array of codecs |
| * @direction: direction supported. Of type snd_compr_direction |
| * @min_fragment_size: minimum fragment supported by DSP |
| * @max_fragment_size: maximum fragment supported by DSP |
| * @min_fragments: min fragments supported by DSP |
| * @max_fragments: max fragments supported by DSP |
| * @num_codecs: number of codecs supported |
| * @reserved: reserved field |
| */ |
| struct snd_compr_caps { |
| __u32 num_codecs; |
| __u32 direction; |
| __u32 min_fragment_size; |
| __u32 max_fragment_size; |
| __u32 min_fragments; |
| __u32 max_fragments; |
| __u32 codecs[MAX_NUM_CODECS]; |
| __u32 reserved[11]; |
| } __attribute__((packed, aligned(4))); |
| |
| /** |
| * struct snd_compr_codec_caps - query capability of codec |
| * @codec: codec for which capability is queried |
| * @num_descriptors: number of codec descriptors |
| * @descriptor: array of codec capability descriptor |
| */ |
| struct snd_compr_codec_caps { |
| __u32 codec; |
| __u32 num_descriptors; |
| struct snd_codec_desc descriptor[MAX_NUM_CODEC_DESCRIPTORS]; |
| } __attribute__((packed, aligned(4))); |
| |
| /** |
| * enum sndrv_compress_encoder |
| * @SNDRV_COMPRESS_ENCODER_PADDING: no of samples appended by the encoder at the |
| * end of the track |
| * @SNDRV_COMPRESS_ENCODER_DELAY: no of samples inserted by the encoder at the |
| * beginning of the track |
| */ |
| enum sndrv_compress_encoder { |
| SNDRV_COMPRESS_ENCODER_PADDING = 1, |
| SNDRV_COMPRESS_ENCODER_DELAY = 2, |
| }; |
| |
| /** |
| * struct snd_compr_metadata - compressed stream metadata |
| * @key: key id |
| * @value: key value |
| */ |
| struct snd_compr_metadata { |
| __u32 key; |
| __u32 value[8]; |
| } __attribute__((packed, aligned(4))); |
| |
| /** |
| * compress path ioctl definitions |
| * SNDRV_COMPRESS_GET_CAPS: Query capability of DSP |
| * SNDRV_COMPRESS_GET_CODEC_CAPS: Query capability of a codec |
| * SNDRV_COMPRESS_SET_PARAMS: Set codec and stream parameters |
| * Note: only codec params can be changed runtime and stream params cant be |
| * SNDRV_COMPRESS_GET_PARAMS: Query codec params |
| * SNDRV_COMPRESS_TSTAMP: get the current timestamp value |
| * SNDRV_COMPRESS_AVAIL: get the current buffer avail value. |
| * This also queries the tstamp properties |
| * SNDRV_COMPRESS_PAUSE: Pause the running stream |
| * SNDRV_COMPRESS_RESUME: resume a paused stream |
| * SNDRV_COMPRESS_START: Start a stream |
| * SNDRV_COMPRESS_STOP: stop a running stream, discarding ring buffer content |
| * and the buffers currently with DSP |
| * SNDRV_COMPRESS_DRAIN: Play till end of buffers and stop after that |
| * SNDRV_COMPRESS_IOCTL_VERSION: Query the API version |
| */ |
| #define SNDRV_COMPRESS_IOCTL_VERSION _IOR('C', 0x00, int) |
| #define SNDRV_COMPRESS_GET_CAPS _IOWR('C', 0x10, struct snd_compr_caps) |
| #define SNDRV_COMPRESS_GET_CODEC_CAPS _IOWR('C', 0x11,\ |
| struct snd_compr_codec_caps) |
| #define SNDRV_COMPRESS_SET_PARAMS _IOW('C', 0x12, struct snd_compr_params) |
| #define SNDRV_COMPRESS_GET_PARAMS _IOR('C', 0x13, struct snd_codec) |
| #define SNDRV_COMPRESS_SET_METADATA _IOW('C', 0x14,\ |
| struct snd_compr_metadata) |
| #define SNDRV_COMPRESS_GET_METADATA _IOWR('C', 0x15,\ |
| struct snd_compr_metadata) |
| #define SNDRV_COMPRESS_TSTAMP _IOR('C', 0x20, struct snd_compr_tstamp) |
| #define SNDRV_COMPRESS_AVAIL _IOR('C', 0x21, struct snd_compr_avail) |
| #define SNDRV_COMPRESS_PAUSE _IO('C', 0x30) |
| #define SNDRV_COMPRESS_RESUME _IO('C', 0x31) |
| #define SNDRV_COMPRESS_START _IO('C', 0x32) |
| #define SNDRV_COMPRESS_STOP _IO('C', 0x33) |
| #define SNDRV_COMPRESS_DRAIN _IO('C', 0x34) |
| #define SNDRV_COMPRESS_NEXT_TRACK _IO('C', 0x35) |
| #define SNDRV_COMPRESS_PARTIAL_DRAIN _IO('C', 0x36) |
| /* |
| * TODO |
| * 1. add mmap support |
| * |
| */ |
| #define SND_COMPR_TRIGGER_DRAIN 7 /*FIXME move this to pcm.h */ |
| #define SND_COMPR_TRIGGER_NEXT_TRACK 8 |
| #define SND_COMPR_TRIGGER_PARTIAL_DRAIN 9 |
| #endif |
