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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@linux.intel.com>
7  *              Vinod Koul <vinod.koul@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