LXR linux/include/uapi/sound/compress

   1/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) AND MIT) */
   2/*
   3 *  compress_params.h - codec types and parameters for compressed data
   4 *  streaming interface
   5 *
   6 *  Copyright (C) 2011 Intel Corporation
   7 *  Authors:    Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
   8 *              Vinod Koul <vinod.koul@linux.intel.com>
   9 *
  10 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  11 *
  12 *  This program is free software; you can redistribute it and/or modify
  13 *  it under the terms of the GNU General Public License as published by
  14 *  the Free Software Foundation; version 2 of the License.
  15 *
  16 *  This program is distributed in the hope that it will be useful, but
  17 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  18 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 *  General Public License for more details.
  20 *
  21 *  You should have received a copy of the GNU General Public License along
  22 *  with this program; if not, write to the Free Software Foundation, Inc.,
  23 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  24 *
  25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  26 *
  27 * The definitions in this file are derived from the OpenMAX AL version 1.1
  28 * and OpenMAX IL v 1.1.2 header files which contain the copyright notice below.
  29 *
  30 * Copyright (c) 2007-2010 The Khronos Group Inc.
  31 *
  32 * Permission is hereby granted, free of charge, to any person obtaining
  33 * a copy of this software and/or associated documentation files (the
  34 * "Materials "), to deal in the Materials without restriction, including
  35 * without limitation the rights to use, copy, modify, merge, publish,
  36 * distribute, sublicense, and/or sell copies of the Materials, and to
  37 * permit persons to whom the Materials are furnished to do so, subject to
  38 * the following conditions:
  39 *
  40 * The above copyright notice and this permission notice shall be included
  41 * in all copies or substantial portions of the Materials.
  42 *
  43 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  44 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  45 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  46 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  47 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  48 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  49 * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
  50 *
  51 */
  52#ifndef __SND_COMPRESS_PARAMS_H
  53#define __SND_COMPRESS_PARAMS_H
  54
  55#include <linux/types.h>
  56
  57/* AUDIO CODECS SUPPORTED */
  58#define MAX_NUM_CODECS 32
  59#define MAX_NUM_CODEC_DESCRIPTORS 32
  60#define MAX_NUM_BITRATES 32
  61#define MAX_NUM_SAMPLE_RATES 32
  62
  63/* Codecs are listed linearly to allow for extensibility */
  64#define SND_AUDIOCODEC_PCM                   ((__u32) 0x00000001)
  65#define SND_AUDIOCODEC_MP3                   ((__u32) 0x00000002)
  66#define SND_AUDIOCODEC_AMR                   ((__u32) 0x00000003)
  67#define SND_AUDIOCODEC_AMRWB                 ((__u32) 0x00000004)
  68#define SND_AUDIOCODEC_AMRWBPLUS             ((__u32) 0x00000005)
  69#define SND_AUDIOCODEC_AAC                   ((__u32) 0x00000006)
  70#define SND_AUDIOCODEC_WMA                   ((__u32) 0x00000007)
  71#define SND_AUDIOCODEC_REAL                  ((__u32) 0x00000008)
  72#define SND_AUDIOCODEC_VORBIS                ((__u32) 0x00000009)
  73#define SND_AUDIOCODEC_FLAC                  ((__u32) 0x0000000A)
  74#define SND_AUDIOCODEC_IEC61937              ((__u32) 0x0000000B)
  75#define SND_AUDIOCODEC_G723_1                ((__u32) 0x0000000C)
  76#define SND_AUDIOCODEC_G729                  ((__u32) 0x0000000D)
  77#define SND_AUDIOCODEC_BESPOKE               ((__u32) 0x0000000E)
  78#define SND_AUDIOCODEC_ALAC                  ((__u32) 0x0000000F)
  79#define SND_AUDIOCODEC_APE                   ((__u32) 0x00000010)
  80#define SND_AUDIOCODEC_MAX                   SND_AUDIOCODEC_APE
  81
  82/*
  83 * Profile and modes are listed with bit masks. This allows for a
  84 * more compact representation of fields that will not evolve
  85 * (in contrast to the list of codecs)
  86 */
  87
  88#define SND_AUDIOPROFILE_PCM                 ((__u32) 0x00000001)
  89
  90/* MP3 modes are only useful for encoders */
  91#define SND_AUDIOCHANMODE_MP3_MONO           ((__u32) 0x00000001)
  92#define SND_AUDIOCHANMODE_MP3_STEREO         ((__u32) 0x00000002)
  93#define SND_AUDIOCHANMODE_MP3_JOINTSTEREO    ((__u32) 0x00000004)
  94#define SND_AUDIOCHANMODE_MP3_DUAL           ((__u32) 0x00000008)
  95
  96#define SND_AUDIOPROFILE_AMR                 ((__u32) 0x00000001)
  97
  98/* AMR modes are only useful for encoders */
  99#define SND_AUDIOMODE_AMR_DTX_OFF            ((__u32) 0x00000001)
 100#define SND_AUDIOMODE_AMR_VAD1               ((__u32) 0x00000002)
 101#define SND_AUDIOMODE_AMR_VAD2               ((__u32) 0x00000004)
 102
 103#define SND_AUDIOSTREAMFORMAT_UNDEFINED      ((__u32) 0x00000000)
 104#define SND_AUDIOSTREAMFORMAT_CONFORMANCE    ((__u32) 0x00000001)
 105#define SND_AUDIOSTREAMFORMAT_IF1            ((__u32) 0x00000002)
 106#define SND_AUDIOSTREAMFORMAT_IF2            ((__u32) 0x00000004)
 107#define SND_AUDIOSTREAMFORMAT_FSF            ((__u32) 0x00000008)
 108#define SND_AUDIOSTREAMFORMAT_RTPPAYLOAD     ((__u32) 0x00000010)
 109#define SND_AUDIOSTREAMFORMAT_ITU            ((__u32) 0x00000020)
 110
 111#define SND_AUDIOPROFILE_AMRWB               ((__u32) 0x00000001)
 112
 113/* AMRWB modes are only useful for encoders */
 114#define SND_AUDIOMODE_AMRWB_DTX_OFF          ((__u32) 0x00000001)
 115#define SND_AUDIOMODE_AMRWB_VAD1             ((__u32) 0x00000002)
 116#define SND_AUDIOMODE_AMRWB_VAD2             ((__u32) 0x00000004)
 117
 118#define SND_AUDIOPROFILE_AMRWBPLUS           ((__u32) 0x00000001)
 119
 120#define SND_AUDIOPROFILE_AAC                 ((__u32) 0x00000001)
 121
 122/* AAC modes are required for encoders and decoders */
 123#define SND_AUDIOMODE_AAC_MAIN               ((__u32) 0x00000001)
 124#define SND_AUDIOMODE_AAC_LC                 ((__u32) 0x00000002)
 125#define SND_AUDIOMODE_AAC_SSR                ((__u32) 0x00000004)
 126#define SND_AUDIOMODE_AAC_LTP                ((__u32) 0x00000008)
 127#define SND_AUDIOMODE_AAC_HE                 ((__u32) 0x00000010)
 128#define SND_AUDIOMODE_AAC_SCALABLE           ((__u32) 0x00000020)
 129#define SND_AUDIOMODE_AAC_ERLC               ((__u32) 0x00000040)
 130#define SND_AUDIOMODE_AAC_LD                 ((__u32) 0x00000080)
 131#define SND_AUDIOMODE_AAC_HE_PS              ((__u32) 0x00000100)
 132#define SND_AUDIOMODE_AAC_HE_MPS             ((__u32) 0x00000200)
 133
 134/* AAC formats are required for encoders and decoders */
 135#define SND_AUDIOSTREAMFORMAT_MP2ADTS        ((__u32) 0x00000001)
 136#define SND_AUDIOSTREAMFORMAT_MP4ADTS        ((__u32) 0x00000002)
 137#define SND_AUDIOSTREAMFORMAT_MP4LOAS        ((__u32) 0x00000004)
 138#define SND_AUDIOSTREAMFORMAT_MP4LATM        ((__u32) 0x00000008)
 139#define SND_AUDIOSTREAMFORMAT_ADIF           ((__u32) 0x00000010)
 140#define SND_AUDIOSTREAMFORMAT_MP4FF          ((__u32) 0x00000020)
 141#define SND_AUDIOSTREAMFORMAT_RAW            ((__u32) 0x00000040)
 142
 143#define SND_AUDIOPROFILE_WMA7                ((__u32) 0x00000001)
 144#define SND_AUDIOPROFILE_WMA8                ((__u32) 0x00000002)
 145#define SND_AUDIOPROFILE_WMA9                ((__u32) 0x00000004)
 146#define SND_AUDIOPROFILE_WMA10               ((__u32) 0x00000008)
 147#define SND_AUDIOPROFILE_WMA9_PRO            ((__u32) 0x00000010)
 148#define SND_AUDIOPROFILE_WMA9_LOSSLESS       ((__u32) 0x00000020)
 149#define SND_AUDIOPROFILE_WMA10_LOSSLESS      ((__u32) 0x00000040)
 150
 151#define SND_AUDIOMODE_WMA_LEVEL1             ((__u32) 0x00000001)
 152#define SND_AUDIOMODE_WMA_LEVEL2             ((__u32) 0x00000002)
 153#define SND_AUDIOMODE_WMA_LEVEL3             ((__u32) 0x00000004)
 154#define SND_AUDIOMODE_WMA_LEVEL4             ((__u32) 0x00000008)
 155#define SND_AUDIOMODE_WMAPRO_LEVELM0         ((__u32) 0x00000010)
 156#define SND_AUDIOMODE_WMAPRO_LEVELM1         ((__u32) 0x00000020)
 157#define SND_AUDIOMODE_WMAPRO_LEVELM2         ((__u32) 0x00000040)
 158#define SND_AUDIOMODE_WMAPRO_LEVELM3         ((__u32) 0x00000080)
 159
 160#define SND_AUDIOSTREAMFORMAT_WMA_ASF        ((__u32) 0x00000001)
 161/*
 162 * Some implementations strip the ASF header and only send ASF packets
 163 * to the DSP
 164 */
 165#define SND_AUDIOSTREAMFORMAT_WMA_NOASF_HDR  ((__u32) 0x00000002)
 166
 167#define SND_AUDIOPROFILE_REALAUDIO           ((__u32) 0x00000001)
 168
 169#define SND_AUDIOMODE_REALAUDIO_G2           ((__u32) 0x00000001)
 170#define SND_AUDIOMODE_REALAUDIO_8            ((__u32) 0x00000002)
 171#define SND_AUDIOMODE_REALAUDIO_10           ((__u32) 0x00000004)
 172#define SND_AUDIOMODE_REALAUDIO_SURROUND     ((__u32) 0x00000008)
 173
 174#define SND_AUDIOPROFILE_VORBIS              ((__u32) 0x00000001)
 175
 176#define SND_AUDIOMODE_VORBIS                 ((__u32) 0x00000001)
 177
 178#define SND_AUDIOPROFILE_FLAC                ((__u32) 0x00000001)
 179
 180/*
 181 * Define quality levels for FLAC encoders, from LEVEL0 (fast)
 182 * to LEVEL8 (best)
 183 */
 184#define SND_AUDIOMODE_FLAC_LEVEL0            ((__u32) 0x00000001)
 185#define SND_AUDIOMODE_FLAC_LEVEL1            ((__u32) 0x00000002)
 186#define SND_AUDIOMODE_FLAC_LEVEL2            ((__u32) 0x00000004)
 187#define SND_AUDIOMODE_FLAC_LEVEL3            ((__u32) 0x00000008)
 188#define SND_AUDIOMODE_FLAC_LEVEL4            ((__u32) 0x00000010)
 189#define SND_AUDIOMODE_FLAC_LEVEL5            ((__u32) 0x00000020)
 190#define SND_AUDIOMODE_FLAC_LEVEL6            ((__u32) 0x00000040)
 191#define SND_AUDIOMODE_FLAC_LEVEL7            ((__u32) 0x00000080)
 192#define SND_AUDIOMODE_FLAC_LEVEL8            ((__u32) 0x00000100)
 193
 194#define SND_AUDIOSTREAMFORMAT_FLAC           ((__u32) 0x00000001)
 195#define SND_AUDIOSTREAMFORMAT_FLAC_OGG       ((__u32) 0x00000002)
 196
 197/* IEC61937 payloads without CUVP and preambles */
 198#define SND_AUDIOPROFILE_IEC61937            ((__u32) 0x00000001)
 199/* IEC61937 with S/PDIF preambles+CUVP bits in 32-bit containers */
 200#define SND_AUDIOPROFILE_IEC61937_SPDIF      ((__u32) 0x00000002)
 201
 202/*
 203 * IEC modes are mandatory for decoders. Format autodetection
 204 * will only happen on the DSP side with mode 0. The PCM mode should
 205 * not be used, the PCM codec should be used instead.
 206 */
 207#define SND_AUDIOMODE_IEC_REF_STREAM_HEADER  ((__u32) 0x00000000)
 208#define SND_AUDIOMODE_IEC_LPCM               ((__u32) 0x00000001)
 209#define SND_AUDIOMODE_IEC_AC3                ((__u32) 0x00000002)
 210#define SND_AUDIOMODE_IEC_MPEG1              ((__u32) 0x00000004)
 211#define SND_AUDIOMODE_IEC_MP3                ((__u32) 0x00000008)
 212#define SND_AUDIOMODE_IEC_MPEG2              ((__u32) 0x00000010)
 213#define SND_AUDIOMODE_IEC_AACLC              ((__u32) 0x00000020)
 214#define SND_AUDIOMODE_IEC_DTS                ((__u32) 0x00000040)
 215#define SND_AUDIOMODE_IEC_ATRAC              ((__u32) 0x00000080)
 216#define SND_AUDIOMODE_IEC_SACD               ((__u32) 0x00000100)
 217#define SND_AUDIOMODE_IEC_EAC3               ((__u32) 0x00000200)
 218#define SND_AUDIOMODE_IEC_DTS_HD             ((__u32) 0x00000400)
 219#define SND_AUDIOMODE_IEC_MLP                ((__u32) 0x00000800)
 220#define SND_AUDIOMODE_IEC_DST                ((__u32) 0x00001000)
 221#define SND_AUDIOMODE_IEC_WMAPRO             ((__u32) 0x00002000)
 222#define SND_AUDIOMODE_IEC_REF_CXT            ((__u32) 0x00004000)
 223#define SND_AUDIOMODE_IEC_HE_AAC             ((__u32) 0x00008000)
 224#define SND_AUDIOMODE_IEC_HE_AAC2            ((__u32) 0x00010000)
 225#define SND_AUDIOMODE_IEC_MPEG_SURROUND      ((__u32) 0x00020000)
 226
 227#define SND_AUDIOPROFILE_G723_1              ((__u32) 0x00000001)
 228
 229#define SND_AUDIOMODE_G723_1_ANNEX_A         ((__u32) 0x00000001)
 230#define SND_AUDIOMODE_G723_1_ANNEX_B         ((__u32) 0x00000002)
 231#define SND_AUDIOMODE_G723_1_ANNEX_C         ((__u32) 0x00000004)
 232
 233#define SND_AUDIOPROFILE_G729                ((__u32) 0x00000001)
 234
 235#define SND_AUDIOMODE_G729_ANNEX_A           ((__u32) 0x00000001)
 236#define SND_AUDIOMODE_G729_ANNEX_B           ((__u32) 0x00000002)
 237
 238/* <FIXME: multichannel encoders aren't supported for now. Would need
 239   an additional definition of channel arrangement> */
 240
 241/* VBR/CBR definitions */
 242#define SND_RATECONTROLMODE_CONSTANTBITRATE  ((__u32) 0x00000001)
 243#define SND_RATECONTROLMODE_VARIABLEBITRATE  ((__u32) 0x00000002)
 244
 245/* Encoder options */
 246
 247struct snd_enc_wma {
 248        __u32 super_block_align; /* WMA Type-specific data */
 249};
 250
 251
 252/**
 253 * struct snd_enc_vorbis
 254 * @quality: Sets encoding quality to n, between -1 (low) and 10 (high).
 255 * In the default mode of operation, the quality level is 3.
 256 * Normal quality range is 0 - 10.
 257 * @managed: Boolean. Set  bitrate  management  mode. This turns off the
 258 * normal VBR encoding, but allows hard or soft bitrate constraints to be
 259 * enforced by the encoder. This mode can be slower, and may also be
 260 * lower quality. It is primarily useful for streaming.
 261 * @max_bit_rate: Enabled only if managed is TRUE
 262 * @min_bit_rate: Enabled only if managed is TRUE
 263 * @downmix: Boolean. Downmix input from stereo to mono (has no effect on
 264 * non-stereo streams). Useful for lower-bitrate encoding.
 265 *
 266 * These options were extracted from the OpenMAX IL spec and Gstreamer vorbisenc
 267 * properties
 268 *
 269 * For best quality users should specify VBR mode and set quality levels.
 270 */
 271
 272struct snd_enc_vorbis {
 273        __s32 quality;
 274        __u32 managed;
 275        __u32 max_bit_rate;
 276        __u32 min_bit_rate;
 277        __u32 downmix;
 278} __attribute__((packed, aligned(4)));
 279
 280
 281/**
 282 * struct snd_enc_real
 283 * @quant_bits: number of coupling quantization bits in the stream
 284 * @start_region: coupling start region in the stream
 285 * @num_regions: number of regions value
 286 *
 287 * These options were extracted from the OpenMAX IL spec
 288 */
 289
 290struct snd_enc_real {
 291        __u32 quant_bits;
 292        __u32 start_region;
 293        __u32 num_regions;
 294} __attribute__((packed, aligned(4)));
 295
 296/**
 297 * struct snd_enc_flac
 298 * @num: serial number, valid only for OGG formats
 299 *      needs to be set by application
 300 * @gain: Add replay gain tags
 301 *
 302 * These options were extracted from the FLAC online documentation
 303 * at http://flac.sourceforge.net/documentation_tools_flac.html
 304 *
 305 * To make the API simpler, it is assumed that the user will select quality
 306 * profiles. Additional options that affect encoding quality and speed can
 307 * be added at a later stage if needed.
 308 *
 309 * By default the Subset format is used by encoders.
 310 *
 311 * TAGS such as pictures, etc, cannot be handled by an offloaded encoder and are
 312 * not supported in this API.
 313 */
 314
 315struct snd_enc_flac {
 316        __u32 num;
 317        __u32 gain;
 318} __attribute__((packed, aligned(4)));
 319
 320struct snd_enc_generic {
 321        __u32 bw;       /* encoder bandwidth */
 322        __s32 reserved[15];     /* Can be used for SND_AUDIOCODEC_BESPOKE */
 323} __attribute__((packed, aligned(4)));
 324
 325struct snd_dec_flac {
 326        __u16 sample_size;
 327        __u16 min_blk_size;
 328        __u16 max_blk_size;
 329        __u16 min_frame_size;
 330        __u16 max_frame_size;
 331        __u16 reserved;
 332} __attribute__((packed, aligned(4)));
 333
 334struct snd_dec_wma {
 335        __u32 encoder_option;
 336        __u32 adv_encoder_option;
 337        __u32 adv_encoder_option2;
 338        __u32 reserved;
 339} __attribute__((packed, aligned(4)));
 340
 341struct snd_dec_alac {
 342        __u32 frame_length;
 343        __u8 compatible_version;
 344        __u8 pb;
 345        __u8 mb;
 346        __u8 kb;
 347        __u32 max_run;
 348        __u32 max_frame_bytes;
 349} __attribute__((packed, aligned(4)));
 350
 351struct snd_dec_ape {
 352        __u16 compatible_version;
 353        __u16 compression_level;
 354        __u32 format_flags;
 355        __u32 blocks_per_frame;
 356        __u32 final_frame_blocks;
 357        __u32 total_frames;
 358        __u32 seek_table_present;
 359} __attribute__((packed, aligned(4)));
 360
 361union snd_codec_options {
 362        struct snd_enc_wma wma;
 363        struct snd_enc_vorbis vorbis;
 364        struct snd_enc_real real;
 365        struct snd_enc_flac flac;
 366        struct snd_enc_generic generic;
 367        struct snd_dec_flac flac_d;
 368        struct snd_dec_wma wma_d;
 369        struct snd_dec_alac alac_d;
 370        struct snd_dec_ape ape_d;
 371} __attribute__((packed, aligned(4)));
 372
 373/** struct snd_codec_desc - description of codec capabilities
 374 * @max_ch: Maximum number of audio channels
 375 * @sample_rates: Sampling rates in Hz, use values like 48000 for this
 376 * @num_sample_rates: Number of valid values in sample_rates array
 377 * @bit_rate: Indexed array containing supported bit rates
 378 * @num_bitrates: Number of valid values in bit_rate array
 379 * @rate_control: value is specified by SND_RATECONTROLMODE defines.
 380 * @profiles: Supported profiles. See SND_AUDIOPROFILE defines.
 381 * @modes: Supported modes. See SND_AUDIOMODE defines
 382 * @formats: Supported formats. See SND_AUDIOSTREAMFORMAT defines
 383 * @min_buffer: Minimum buffer size handled by codec implementation
 384 * @reserved: reserved for future use
 385 *
 386 * This structure provides a scalar value for profiles, modes and stream
 387 * format fields.
 388 * If an implementation supports multiple combinations, they will be listed as
 389 * codecs with different descriptors, for example there would be 2 descriptors
 390 * for AAC-RAW and AAC-ADTS.
 391 * This entails some redundancy but makes it easier to avoid invalid
 392 * configurations.
 393 *
 394 */
 395
 396struct snd_codec_desc {
 397        __u32 max_ch;
 398        __u32 sample_rates[MAX_NUM_SAMPLE_RATES];
 399        __u32 num_sample_rates;
 400        __u32 bit_rate[MAX_NUM_BITRATES];
 401        __u32 num_bitrates;
 402        __u32 rate_control;
 403        __u32 profiles;
 404        __u32 modes;
 405        __u32 formats;
 406        __u32 min_buffer;
 407        __u32 reserved[15];
 408} __attribute__((packed, aligned(4)));
 409
 410/** struct snd_codec
 411 * @id: Identifies the supported audio encoder/decoder.
 412 *              See SND_AUDIOCODEC macros.
 413 * @ch_in: Number of input audio channels
 414 * @ch_out: Number of output channels. In case of contradiction between
 415 *              this field and the channelMode field, the channelMode field
 416 *              overrides.
 417 * @sample_rate: Audio sample rate of input data in Hz, use values like 48000
 418 *              for this.
 419 * @bit_rate: Bitrate of encoded data. May be ignored by decoders
 420 * @rate_control: Encoding rate control. See SND_RATECONTROLMODE defines.
 421 *               Encoders may rely on profiles for quality levels.
 422 *               May be ignored by decoders.
 423 * @profile: Mandatory for encoders, can be mandatory for specific
 424 *              decoders as well. See SND_AUDIOPROFILE defines.
 425 * @level: Supported level (Only used by WMA at the moment)
 426 * @ch_mode: Channel mode for encoder. See SND_AUDIOCHANMODE defines
 427 * @format: Format of encoded bistream. Mandatory when defined.
 428 *              See SND_AUDIOSTREAMFORMAT defines.
 429 * @align: Block alignment in bytes of an audio sample.
 430 *              Only required for PCM or IEC formats.
 431 * @options: encoder-specific settings
 432 * @reserved: reserved for future use
 433 */
 434
 435struct snd_codec {
 436        __u32 id;
 437        __u32 ch_in;
 438        __u32 ch_out;
 439        __u32 sample_rate;
 440        __u32 bit_rate;
 441        __u32 rate_control;
 442        __u32 profile;
 443        __u32 level;
 444        __u32 ch_mode;
 445        __u32 format;
 446        __u32 align;
 447        union snd_codec_options options;
 448        __u32 reserved[3];
 449} __attribute__((packed, aligned(4)));
 450
 451#endif
 452