1 /* 2 * compress_params.h - codec types and parameters for compressed data 3 * streaming interface 4 * 5 * Copyright (C) 2011 Intel Corporation 6 * Authors: Pierre-Louis Bossart <pierre-louis.bossart (at) linux.intel.com> 7 * Vinod Koul <vinod.koul (at) linux.intel.com> 8 * 9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; version 2 of the License. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License along 21 * with this program; if not, write to the Free Software Foundation, Inc., 22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 23 * 24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 25 * 26 * The definitions in this file are derived from the OpenMAX AL version 1.1 27 * and OpenMAX IL v 1.1.2 header files which contain the copyright notice below. 28 * 29 * Copyright (c) 2007-2010 The Khronos Group Inc. 30 * 31 * Permission is hereby granted, free of charge, to any person obtaining 32 * a copy of this software and/or associated documentation files (the 33 * "Materials "), to deal in the Materials without restriction, including 34 * without limitation the rights to use, copy, modify, merge, publish, 35 * distribute, sublicense, and/or sell copies of the Materials, and to 36 * permit persons to whom the Materials are furnished to do so, subject to 37 * the following conditions: 38 * 39 * The above copyright notice and this permission notice shall be included 40 * in all copies or substantial portions of the Materials. 41 * 42 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 43 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 44 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 45 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 46 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 47 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 48 * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. 49 * 50 */ 51 #ifndef __SND_COMPRESS_PARAMS_H 52 #define __SND_COMPRESS_PARAMS_H 53 54 #include <linux/types.h> 55 56 #define SND_DEC_DDP_MAX_PARAMS 18 57 58 /* AUDIO CODECS SUPPORTED */ 59 #define MAX_NUM_CODECS 32 60 #define MAX_NUM_CODEC_DESCRIPTORS 32 61 #define MAX_NUM_BITRATES 32 62 #define MAX_NUM_SAMPLE_RATES 32 63 64 /* compressed TX */ 65 #define MAX_NUM_FRAMES_PER_BUFFER 1 66 #define COMPRESSED_META_DATA_MODE 0x10 67 #define META_DATA_LEN_BYTES 36 68 #define Q6_AC3_DECODER 0x00010BF6 69 #define Q6_EAC3_DECODER 0x00010C3C 70 #define Q6_DTS 0x00010D88 71 #define Q6_DTS_LBR 0x00010DBB 72 73 /* Timestamp flsg */ 74 /* Bit-0 - 1 : Enable Timestamp mode */ 75 /* Bit-0 - 0 : Disable Timestamp mode */ 76 #define COMPRESSED_TIMESTAMP_FLAG 0x0001 77 78 /* Codecs are listed linearly to allow for extensibility */ 79 #define SND_AUDIOCODEC_PCM ((__u32) 0x00000001) 80 #define SND_AUDIOCODEC_MP3 ((__u32) 0x00000002) 81 #define SND_AUDIOCODEC_AMR ((__u32) 0x00000003) 82 #define SND_AUDIOCODEC_AMRWB ((__u32) 0x00000004) 83 #define SND_AUDIOCODEC_AMRWBPLUS ((__u32) 0x00000005) 84 #define SND_AUDIOCODEC_AAC ((__u32) 0x00000006) 85 #define SND_AUDIOCODEC_WMA ((__u32) 0x00000007) 86 #define SND_AUDIOCODEC_REAL ((__u32) 0x00000008) 87 #define SND_AUDIOCODEC_VORBIS ((__u32) 0x00000009) 88 #define SND_AUDIOCODEC_FLAC ((__u32) 0x0000000A) 89 #define SND_AUDIOCODEC_IEC61937 ((__u32) 0x0000000B) 90 #define SND_AUDIOCODEC_G723_1 ((__u32) 0x0000000C) 91 #define SND_AUDIOCODEC_G729 ((__u32) 0x0000000D) 92 #define SND_AUDIOCODEC_DTS_PASS_THROUGH ((__u32) 0x0000000E) 93 #define SND_AUDIOCODEC_DTS_LBR ((__u32) 0x0000000F) 94 #define SND_AUDIOCODEC_DTS_TRANSCODE_LOOPBACK ((__u32) 0x00000010) 95 #define SND_AUDIOCODEC_PASS_THROUGH ((__u32) 0x00000011) 96 #define SND_AUDIOCODEC_MP2 ((__u32) 0x00000012) 97 #define SND_AUDIOCODEC_DTS_LBR_PASS_THROUGH ((__u32) 0x00000013) 98 #define SND_AUDIOCODEC_AC3 ((__u32) 0x00000014) 99 #define SND_AUDIOCODEC_AC3_PASS_THROUGH ((__u32) 0x00000015) 100 #define SND_AUDIOCODEC_WMA_PRO ((__u32) 0x00000016) 101 #define SND_AUDIOCODEC_DTS ((__u32) 0x00000017) 102 #define SND_AUDIOCODEC_EAC3 ((__u32) 0x00000018) 103 #define SND_AUDIOCODEC_ALAC ((__u32) 0x00000019) 104 #define SND_AUDIOCODEC_APE ((__u32) 0x00000020) 105 #define SND_AUDIOCODEC_DSD ((__u32) 0x00000021) 106 #define SND_AUDIOCODEC_APTX ((__u32) 0x00000022) 107 #define SND_AUDIOCODEC_MAX SND_AUDIOCODEC_APTX 108 /* 109 * Profile and modes are listed with bit masks. This allows for a 110 * more compact representation of fields that will not evolve 111 * (in contrast to the list of codecs) 112 */ 113 114 #define SND_AUDIOPROFILE_PCM ((__u32) 0x00000001) 115 116 /* MP3 modes are only useful for encoders */ 117 #define SND_AUDIOCHANMODE_MP3_MONO ((__u32) 0x00000001) 118 #define SND_AUDIOCHANMODE_MP3_STEREO ((__u32) 0x00000002) 119 #define SND_AUDIOCHANMODE_MP3_JOINTSTEREO ((__u32) 0x00000004) 120 #define SND_AUDIOCHANMODE_MP3_DUAL ((__u32) 0x00000008) 121 122 #define SND_AUDIOPROFILE_AMR ((__u32) 0x00000001) 123 124 /* AMR modes are only useful for encoders */ 125 #define SND_AUDIOMODE_AMR_DTX_OFF ((__u32) 0x00000001) 126 #define SND_AUDIOMODE_AMR_VAD1 ((__u32) 0x00000002) 127 #define SND_AUDIOMODE_AMR_VAD2 ((__u32) 0x00000004) 128 129 #define SND_AUDIOSTREAMFORMAT_UNDEFINED ((__u32) 0x00000000) 130 #define SND_AUDIOSTREAMFORMAT_CONFORMANCE ((__u32) 0x00000001) 131 #define SND_AUDIOSTREAMFORMAT_IF1 ((__u32) 0x00000002) 132 #define SND_AUDIOSTREAMFORMAT_IF2 ((__u32) 0x00000004) 133 #define SND_AUDIOSTREAMFORMAT_FSF ((__u32) 0x00000008) 134 #define SND_AUDIOSTREAMFORMAT_RTPPAYLOAD ((__u32) 0x00000010) 135 #define SND_AUDIOSTREAMFORMAT_ITU ((__u32) 0x00000020) 136 137 #define SND_AUDIOPROFILE_AMRWB ((__u32) 0x00000001) 138 139 /* AMRWB modes are only useful for encoders */ 140 #define SND_AUDIOMODE_AMRWB_DTX_OFF ((__u32) 0x00000001) 141 #define SND_AUDIOMODE_AMRWB_VAD1 ((__u32) 0x00000002) 142 #define SND_AUDIOMODE_AMRWB_VAD2 ((__u32) 0x00000004) 143 144 #define SND_AUDIOPROFILE_AMRWBPLUS ((__u32) 0x00000001) 145 146 #define SND_AUDIOPROFILE_AAC ((__u32) 0x00000001) 147 148 /* AAC modes are required for encoders and decoders */ 149 #define SND_AUDIOMODE_AAC_MAIN ((__u32) 0x00000001) 150 #define SND_AUDIOMODE_AAC_LC ((__u32) 0x00000002) 151 #define SND_AUDIOMODE_AAC_SSR ((__u32) 0x00000004) 152 #define SND_AUDIOMODE_AAC_LTP ((__u32) 0x00000008) 153 #define SND_AUDIOMODE_AAC_HE ((__u32) 0x00000010) 154 #define SND_AUDIOMODE_AAC_SCALABLE ((__u32) 0x00000020) 155 #define SND_AUDIOMODE_AAC_ERLC ((__u32) 0x00000040) 156 #define SND_AUDIOMODE_AAC_LD ((__u32) 0x00000080) 157 #define SND_AUDIOMODE_AAC_HE_PS ((__u32) 0x00000100) 158 #define SND_AUDIOMODE_AAC_HE_MPS ((__u32) 0x00000200) 159 160 /* AAC formats are required for encoders and decoders */ 161 #define SND_AUDIOSTREAMFORMAT_MP2ADTS ((__u32) 0x00000001) 162 #define SND_AUDIOSTREAMFORMAT_MP4ADTS ((__u32) 0x00000002) 163 #define SND_AUDIOSTREAMFORMAT_MP4LOAS ((__u32) 0x00000004) 164 #define SND_AUDIOSTREAMFORMAT_MP4LATM ((__u32) 0x00000008) 165 #define SND_AUDIOSTREAMFORMAT_ADIF ((__u32) 0x00000010) 166 #define SND_AUDIOSTREAMFORMAT_MP4FF ((__u32) 0x00000020) 167 #define SND_AUDIOSTREAMFORMAT_RAW ((__u32) 0x00000040) 168 169 #define SND_AUDIOPROFILE_WMA7 ((__u32) 0x00000001) 170 #define SND_AUDIOPROFILE_WMA8 ((__u32) 0x00000002) 171 #define SND_AUDIOPROFILE_WMA9 ((__u32) 0x00000004) 172 #define SND_AUDIOPROFILE_WMA10 ((__u32) 0x00000008) 173 174 #define SND_AUDIOMODE_WMA_LEVEL1 ((__u32) 0x00000001) 175 #define SND_AUDIOMODE_WMA_LEVEL2 ((__u32) 0x00000002) 176 #define SND_AUDIOMODE_WMA_LEVEL3 ((__u32) 0x00000004) 177 #define SND_AUDIOMODE_WMA_LEVEL4 ((__u32) 0x00000008) 178 #define SND_AUDIOMODE_WMAPRO_LEVELM0 ((__u32) 0x00000010) 179 #define SND_AUDIOMODE_WMAPRO_LEVELM1 ((__u32) 0x00000020) 180 #define SND_AUDIOMODE_WMAPRO_LEVELM2 ((__u32) 0x00000040) 181 #define SND_AUDIOMODE_WMAPRO_LEVELM3 ((__u32) 0x00000080) 182 183 #define SND_AUDIOSTREAMFORMAT_WMA_ASF ((__u32) 0x00000001) 184 /* 185 * Some implementations strip the ASF header and only send ASF packets 186 * to the DSP 187 */ 188 #define SND_AUDIOSTREAMFORMAT_WMA_NOASF_HDR ((__u32) 0x00000002) 189 190 #define SND_AUDIOPROFILE_REALAUDIO ((__u32) 0x00000001) 191 192 #define SND_AUDIOMODE_REALAUDIO_G2 ((__u32) 0x00000001) 193 #define SND_AUDIOMODE_REALAUDIO_8 ((__u32) 0x00000002) 194 #define SND_AUDIOMODE_REALAUDIO_10 ((__u32) 0x00000004) 195 #define SND_AUDIOMODE_REALAUDIO_SURROUND ((__u32) 0x00000008) 196 197 #define SND_AUDIOPROFILE_VORBIS ((__u32) 0x00000001) 198 199 #define SND_AUDIOMODE_VORBIS ((__u32) 0x00000001) 200 201 #define SND_AUDIOPROFILE_FLAC ((__u32) 0x00000001) 202 203 /* 204 * Define quality levels for FLAC encoders, from LEVEL0 (fast) 205 * to LEVEL8 (best) 206 */ 207 #define SND_AUDIOMODE_FLAC_LEVEL0 ((__u32) 0x00000001) 208 #define SND_AUDIOMODE_FLAC_LEVEL1 ((__u32) 0x00000002) 209 #define SND_AUDIOMODE_FLAC_LEVEL2 ((__u32) 0x00000004) 210 #define SND_AUDIOMODE_FLAC_LEVEL3 ((__u32) 0x00000008) 211 #define SND_AUDIOMODE_FLAC_LEVEL4 ((__u32) 0x00000010) 212 #define SND_AUDIOMODE_FLAC_LEVEL5 ((__u32) 0x00000020) 213 #define SND_AUDIOMODE_FLAC_LEVEL6 ((__u32) 0x00000040) 214 #define SND_AUDIOMODE_FLAC_LEVEL7 ((__u32) 0x00000080) 215 #define SND_AUDIOMODE_FLAC_LEVEL8 ((__u32) 0x00000100) 216 217 #define SND_AUDIOSTREAMFORMAT_FLAC ((__u32) 0x00000001) 218 #define SND_AUDIOSTREAMFORMAT_FLAC_OGG ((__u32) 0x00000002) 219 220 /* IEC61937 payloads without CUVP and preambles */ 221 #define SND_AUDIOPROFILE_IEC61937 ((__u32) 0x00000001) 222 /* IEC61937 with S/PDIF preambles+CUVP bits in 32-bit containers */ 223 #define SND_AUDIOPROFILE_IEC61937_SPDIF ((__u32) 0x00000002) 224 225 /* 226 * IEC modes are mandatory for decoders. Format autodetection 227 * will only happen on the DSP side with mode 0. The PCM mode should 228 * not be used, the PCM codec should be used instead. 229 */ 230 #define SND_AUDIOMODE_IEC_REF_STREAM_HEADER ((__u32) 0x00000000) 231 #define SND_AUDIOMODE_IEC_LPCM ((__u32) 0x00000001) 232 #define SND_AUDIOMODE_IEC_AC3 ((__u32) 0x00000002) 233 #define SND_AUDIOMODE_IEC_MPEG1 ((__u32) 0x00000004) 234 #define SND_AUDIOMODE_IEC_MP3 ((__u32) 0x00000008) 235 #define SND_AUDIOMODE_IEC_MPEG2 ((__u32) 0x00000010) 236 #define SND_AUDIOMODE_IEC_AACLC ((__u32) 0x00000020) 237 #define SND_AUDIOMODE_IEC_DTS ((__u32) 0x00000040) 238 #define SND_AUDIOMODE_IEC_ATRAC ((__u32) 0x00000080) 239 #define SND_AUDIOMODE_IEC_SACD ((__u32) 0x00000100) 240 #define SND_AUDIOMODE_IEC_EAC3 ((__u32) 0x00000200) 241 #define SND_AUDIOMODE_IEC_DTS_HD ((__u32) 0x00000400) 242 #define SND_AUDIOMODE_IEC_MLP ((__u32) 0x00000800) 243 #define SND_AUDIOMODE_IEC_DST ((__u32) 0x00001000) 244 #define SND_AUDIOMODE_IEC_WMAPRO ((__u32) 0x00002000) 245 #define SND_AUDIOMODE_IEC_REF_CXT ((__u32) 0x00004000) 246 #define SND_AUDIOMODE_IEC_HE_AAC ((__u32) 0x00008000) 247 #define SND_AUDIOMODE_IEC_HE_AAC2 ((__u32) 0x00010000) 248 #define SND_AUDIOMODE_IEC_MPEG_SURROUND ((__u32) 0x00020000) 249 250 #define SND_AUDIOPROFILE_G723_1 ((__u32) 0x00000001) 251 252 #define SND_AUDIOMODE_G723_1_ANNEX_A ((__u32) 0x00000001) 253 #define SND_AUDIOMODE_G723_1_ANNEX_B ((__u32) 0x00000002) 254 #define SND_AUDIOMODE_G723_1_ANNEX_C ((__u32) 0x00000004) 255 256 #define SND_AUDIOPROFILE_G729 ((__u32) 0x00000001) 257 258 #define SND_AUDIOMODE_G729_ANNEX_A ((__u32) 0x00000001) 259 #define SND_AUDIOMODE_G729_ANNEX_B ((__u32) 0x00000002) 260 261 /* <FIXME: multichannel encoders aren't supported for now. Would need 262 an additional definition of channel arrangement> */ 263 264 /* VBR/CBR definitions */ 265 #define SND_RATECONTROLMODE_CONSTANTBITRATE ((__u32) 0x00000001) 266 #define SND_RATECONTROLMODE_VARIABLEBITRATE ((__u32) 0x00000002) 267 268 /* Encoder options */ 269 270 struct snd_enc_wma { 271 __u32 super_block_align; /* WMA Type-specific data */ 272 __u32 bits_per_sample; 273 __u32 channelmask; 274 __u32 encodeopt; 275 __u32 encodeopt1; 276 __u32 encodeopt2; 277 __u32 avg_bit_rate; 278 }; 279 280 281 /** 282 * struct snd_enc_vorbis 283 * @quality: Sets encoding quality to n, between -1 (low) and 10 (high). 284 * In the default mode of operation, the quality level is 3. 285 * Normal quality range is 0 - 10. 286 * @managed: Boolean. Set bitrate management mode. This turns off the 287 * normal VBR encoding, but allows hard or soft bitrate constraints to be 288 * enforced by the encoder. This mode can be slower, and may also be 289 * lower quality. It is primarily useful for streaming. 290 * @max_bit_rate: Enabled only if managed is TRUE 291 * @min_bit_rate: Enabled only if managed is TRUE 292 * @downmix: Boolean. Downmix input from stereo to mono (has no effect on 293 * non-stereo streams). Useful for lower-bitrate encoding. 294 * 295 * These options were extracted from the OpenMAX IL spec and Gstreamer vorbisenc 296 * properties 297 * 298 * For best quality users should specify VBR mode and set quality levels. 299 */ 300 301 struct snd_enc_vorbis { 302 __s32 quality; 303 __u32 managed; 304 __u32 max_bit_rate; 305 __u32 min_bit_rate; 306 __u32 downmix; 307 } __attribute__((packed, aligned(4))); 308 309 310 /** 311 * struct snd_enc_real 312 * @quant_bits: number of coupling quantization bits in the stream 313 * @start_region: coupling start region in the stream 314 * @num_regions: number of regions value 315 * 316 * These options were extracted from the OpenMAX IL spec 317 */ 318 319 struct snd_enc_real { 320 __u32 quant_bits; 321 __u32 start_region; 322 __u32 num_regions; 323 } __attribute__((packed, aligned(4))); 324 325 /** 326 * struct snd_enc_flac 327 * @num: serial number, valid only for OGG formats 328 * needs to be set by application 329 * @gain: Add replay gain tags 330 * 331 * These options were extracted from the FLAC online documentation 332 * at http://flac.sourceforge.net/documentation_tools_flac.html 333 * 334 * To make the API simpler, it is assumed that the user will select quality 335 * profiles. Additional options that affect encoding quality and speed can 336 * be added at a later stage if needed. 337 * 338 * By default the Subset format is used by encoders. 339 * 340 * TAGS such as pictures, etc, cannot be handled by an offloaded encoder and are 341 * not supported in this API. 342 */ 343 344 struct snd_enc_flac { 345 __u32 num; 346 __u32 gain; 347 } __attribute__((packed, aligned(4))); 348 349 struct snd_enc_generic { 350 __u32 bw; /* encoder bandwidth */ 351 __s32 reserved[15]; 352 } __attribute__((packed, aligned(4))); 353 354 struct snd_dec_ddp { 355 __u32 params_length; 356 __u32 params_id[SND_DEC_DDP_MAX_PARAMS]; 357 __u32 params_value[SND_DEC_DDP_MAX_PARAMS]; 358 } __attribute__((packed, aligned(4))); 359 360 struct snd_dec_flac { 361 __u16 sample_size; 362 __u16 min_blk_size; 363 __u16 max_blk_size; 364 __u16 min_frame_size; 365 __u16 max_frame_size; 366 } __attribute__((packed, aligned(4))); 367 368 struct snd_dec_vorbis { 369 __u32 bit_stream_fmt; 370 }; 371 372 struct snd_dec_alac { 373 __u32 frame_length; 374 __u8 compatible_version; 375 __u8 bit_depth; 376 __u8 pb; 377 __u8 mb; 378 __u8 kb; 379 __u8 num_channels; 380 __u16 max_run; 381 __u32 max_frame_bytes; 382 __u32 avg_bit_rate; 383 __u32 sample_rate; 384 __u32 channel_layout_tag; 385 }; 386 387 struct snd_dec_ape { 388 __u16 compatible_version; 389 __u16 compression_level; 390 __u32 format_flags; 391 __u32 blocks_per_frame; 392 __u32 final_frame_blocks; 393 __u32 total_frames; 394 __u16 bits_per_sample; 395 __u16 num_channels; 396 __u32 sample_rate; 397 __u32 seek_table_present; 398 }; 399 400 struct snd_dec_aptx { 401 __u32 lap; 402 __u32 uap; 403 __u32 nap; 404 }; 405 406 union snd_codec_options { 407 struct snd_enc_wma wma; 408 struct snd_enc_vorbis vorbis; 409 struct snd_enc_real real; 410 struct snd_enc_flac flac; 411 struct snd_enc_generic generic; 412 struct snd_dec_ddp ddp; 413 struct snd_dec_flac flac_dec; 414 struct snd_dec_vorbis vorbis_dec; 415 struct snd_dec_alac alac; 416 struct snd_dec_ape ape; 417 struct snd_dec_aptx aptx_dec; 418 }; 419 420 /** struct snd_codec_desc - description of codec capabilities 421 * @max_ch: Maximum number of audio channels 422 * @sample_rates: Sampling rates in Hz, use values like 48000 for this 423 * @num_sample_rates: Number of valid values in sample_rates array 424 * @bit_rate: Indexed array containing supported bit rates 425 * @num_bitrates: Number of valid values in bit_rate array 426 * @rate_control: value is specified by SND_RATECONTROLMODE defines. 427 * @profiles: Supported profiles. See SND_AUDIOPROFILE defines. 428 * @modes: Supported modes. See SND_AUDIOMODE defines 429 * @formats: Supported formats. See SND_AUDIOSTREAMFORMAT defines 430 * @min_buffer: Minimum buffer size handled by codec implementation 431 * @reserved: reserved for future use 432 * 433 * This structure provides a scalar value for profiles, modes and stream 434 * format fields. 435 * If an implementation supports multiple combinations, they will be listed as 436 * codecs with different descriptors, for example there would be 2 descriptors 437 * for AAC-RAW and AAC-ADTS. 438 * This entails some redundancy but makes it easier to avoid invalid 439 * configurations. 440 * 441 */ 442 443 struct snd_codec_desc { 444 __u32 max_ch; 445 __u32 sample_rates[MAX_NUM_SAMPLE_RATES]; 446 __u32 num_sample_rates; 447 __u32 bit_rate[MAX_NUM_BITRATES]; 448 __u32 num_bitrates; 449 __u32 rate_control; 450 __u32 profiles; 451 __u32 modes; 452 __u32 formats; 453 __u32 min_buffer; 454 __u32 reserved[15]; 455 } __attribute__((packed, aligned(4))); 456 457 /** struct snd_codec 458 * @id: Identifies the supported audio encoder/decoder. 459 * See SND_AUDIOCODEC macros. 460 * @ch_in: Number of input audio channels 461 * @ch_out: Number of output channels. In case of contradiction between 462 * this field and the channelMode field, the channelMode field 463 * overrides. 464 * @sample_rate: Audio sample rate of input data in Hz, use values like 48000 465 * for this. 466 * @bit_rate: Bitrate of encoded data. May be ignored by decoders 467 * @rate_control: Encoding rate control. See SND_RATECONTROLMODE defines. 468 * Encoders may rely on profiles for quality levels. 469 * May be ignored by decoders. 470 * @profile: Mandatory for encoders, can be mandatory for specific 471 * decoders as well. See SND_AUDIOPROFILE defines. 472 * @level: Supported level (Only used by WMA at the moment) 473 * @ch_mode: Channel mode for encoder. See SND_AUDIOCHANMODE defines 474 * @format: Format of encoded bistream. Mandatory when defined. 475 * See SND_AUDIOSTREAMFORMAT defines. 476 * @align: Block alignment in bytes of an audio sample. 477 * Only required for PCM or IEC formats. 478 * @options: encoder-specific settings 479 * @reserved: reserved for future use 480 */ 481 482 struct snd_codec { 483 __u32 id; 484 __u32 ch_in; 485 __u32 ch_out; 486 __u32 sample_rate; 487 __u32 bit_rate; 488 __u32 rate_control; 489 __u32 profile; 490 __u32 level; 491 __u32 ch_mode; 492 __u32 format; 493 __u32 align; 494 __u32 compr_passthr; 495 union snd_codec_options options; 496 __u32 flags; 497 __u32 reserved[2]; 498 } __attribute__((packed, aligned(4))); 499 500 501 /** struct snd_codec_metadata 502 * @length: Length of the encoded buffer. 503 * @offset: Offset from the buffer address to the first byte of the first 504 * encoded frame. All encoded frames are consecutive starting 505 * from this offset. 506 * @timestamp: Session time in microseconds of the first sample in the buffer. 507 * @reserved: Reserved for future use. 508 */ 509 struct snd_codec_metadata { 510 __u32 length; 511 __u32 offset; 512 __u64 timestamp; 513 __u32 reserved[4]; 514 }; 515 516 #endif 517
