FFmpeg  4.3.9
libfdk-aacdec.c
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1 /*
2  * AAC decoder wrapper
3  * Copyright (c) 2012 Martin Storsjo
4  *
5  * This file is part of FFmpeg.
6  *
7  * Permission to use, copy, modify, and/or distribute this software for any
8  * purpose with or without fee is hereby granted, provided that the above
9  * copyright notice and this permission notice appear in all copies.
10  *
11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18  */
19 
20 #include <fdk-aac/aacdecoder_lib.h>
21 
23 #include "libavutil/common.h"
24 #include "libavutil/opt.h"
25 #include "avcodec.h"
26 #include "internal.h"
27 
28 #ifdef AACDECODER_LIB_VL0
29 #define FDKDEC_VER_AT_LEAST(vl0, vl1) \
30  ((AACDECODER_LIB_VL0 > vl0) || \
31  (AACDECODER_LIB_VL0 == vl0 && AACDECODER_LIB_VL1 >= vl1))
32 #else
33 #define FDKDEC_VER_AT_LEAST(vl0, vl1) 0
34 #endif
35 
36 #if !FDKDEC_VER_AT_LEAST(2, 5) // < 2.5.10
37 #define AAC_PCM_MAX_OUTPUT_CHANNELS AAC_PCM_OUTPUT_CHANNELS
38 #endif
39 
45 };
46 
47 typedef struct FDKAACDecContext {
48  const AVClass *class;
49  HANDLE_AACDECODER handle;
54  int drc_level;
55  int drc_boost;
56  int drc_heavy;
58  int drc_cut;
62 
63 
64 #define DMX_ANC_BUFFSIZE 128
65 #define DECODER_MAX_CHANNELS 8
66 #define DECODER_BUFFSIZE 2048 * sizeof(INT_PCM)
67 
68 #define OFFSET(x) offsetof(FDKAACDecContext, x)
69 #define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
70 static const AVOption fdk_aac_dec_options[] = {
71  { "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, CONCEAL_METHOD_SPECTRAL_MUTING, CONCEAL_METHOD_NB - 1, AD, "conceal" },
72  { "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" },
73  { "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" },
74  { "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },
75  { "drc_boost", "Dynamic Range Control: boost, where [0] is none and [127] is max boost",
76  OFFSET(drc_boost), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL },
77  { "drc_cut", "Dynamic Range Control: attenuation factor, where [0] is none and [127] is max compression",
78  OFFSET(drc_cut), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL },
79  { "drc_level", "Dynamic Range Control: reference level, quantized to 0.25dB steps where [0] is 0dB and [127] is -31.75dB, -1 for auto, and -2 for disabled",
80  OFFSET(drc_level), AV_OPT_TYPE_INT, { .i64 = -1}, -2, 127, AD, NULL },
81  { "drc_heavy", "Dynamic Range Control: heavy compression, where [1] is on (RF mode) and [0] is off",
82  OFFSET(drc_heavy), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 1, AD, NULL },
83 #if FDKDEC_VER_AT_LEAST(2, 5) // 2.5.10
84  { "level_limit", "Signal level limiting",
85  OFFSET(level_limit), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, AD },
86 #endif
87 #if FDKDEC_VER_AT_LEAST(3, 0) // 3.0.0
88  { "drc_effect","Dynamic Range Control: effect type, where e.g. [0] is none and [6] is general",
89  OFFSET(drc_effect), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 8, AD, NULL },
90 #endif
91  { NULL }
92 };
93 
94 static const AVClass fdk_aac_dec_class = {
95  .class_name = "libfdk-aac decoder",
96  .item_name = av_default_item_name,
97  .option = fdk_aac_dec_options,
98  .version = LIBAVUTIL_VERSION_INT,
99 };
100 
101 static int get_stream_info(AVCodecContext *avctx)
102 {
103  FDKAACDecContext *s = avctx->priv_data;
104  CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle);
105  int channel_counts[0x24] = { 0 };
106  int i, ch_error = 0;
107  uint64_t ch_layout = 0;
108 
109  if (!info) {
110  av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
111  return AVERROR_UNKNOWN;
112  }
113 
114  if (info->sampleRate <= 0) {
115  av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");
116  return AVERROR_UNKNOWN;
117  }
118  avctx->sample_rate = info->sampleRate;
119  avctx->frame_size = info->frameSize;
120 #if FDKDEC_VER_AT_LEAST(2, 5) // 2.5.10
121  s->output_delay = info->outputDelay;
122 #endif
123 
124  for (i = 0; i < info->numChannels; i++) {
125  AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];
126  if (ctype <= ACT_NONE || ctype >= FF_ARRAY_ELEMS(channel_counts)) {
127  av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");
128  break;
129  }
130  channel_counts[ctype]++;
131  }
132  av_log(avctx, AV_LOG_DEBUG,
133  "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
134  info->numChannels,
135  channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],
136  channel_counts[ACT_BACK], channel_counts[ACT_LFE],
137  channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +
138  channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]);
139 
140  switch (channel_counts[ACT_FRONT]) {
141  case 4:
144  break;
145  case 3:
147  break;
148  case 2:
149  ch_layout |= AV_CH_LAYOUT_STEREO;
150  break;
151  case 1:
152  ch_layout |= AV_CH_FRONT_CENTER;
153  break;
154  default:
155  av_log(avctx, AV_LOG_WARNING,
156  "unsupported number of front channels: %d\n",
157  channel_counts[ACT_FRONT]);
158  ch_error = 1;
159  break;
160  }
161  if (channel_counts[ACT_SIDE] > 0) {
162  if (channel_counts[ACT_SIDE] == 2) {
163  ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT;
164  } else {
165  av_log(avctx, AV_LOG_WARNING,
166  "unsupported number of side channels: %d\n",
167  channel_counts[ACT_SIDE]);
168  ch_error = 1;
169  }
170  }
171  if (channel_counts[ACT_BACK] > 0) {
172  switch (channel_counts[ACT_BACK]) {
173  case 3:
175  break;
176  case 2:
177  ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT;
178  break;
179  case 1:
180  ch_layout |= AV_CH_BACK_CENTER;
181  break;
182  default:
183  av_log(avctx, AV_LOG_WARNING,
184  "unsupported number of back channels: %d\n",
185  channel_counts[ACT_BACK]);
186  ch_error = 1;
187  break;
188  }
189  }
190  if (channel_counts[ACT_LFE] > 0) {
191  if (channel_counts[ACT_LFE] == 1) {
192  ch_layout |= AV_CH_LOW_FREQUENCY;
193  } else {
194  av_log(avctx, AV_LOG_WARNING,
195  "unsupported number of LFE channels: %d\n",
196  channel_counts[ACT_LFE]);
197  ch_error = 1;
198  }
199  }
200  if (!ch_error &&
201  av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {
202  av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");
203  ch_error = 1;
204  }
205  if (ch_error)
206  avctx->channel_layout = 0;
207  else
208  avctx->channel_layout = ch_layout;
209 
210  avctx->channels = info->numChannels;
211 
212  return 0;
213 }
214 
216 {
217  FDKAACDecContext *s = avctx->priv_data;
218 
219  if (s->handle)
220  aacDecoder_Close(s->handle);
222  av_freep(&s->anc_buffer);
223 
224  return 0;
225 }
226 
228 {
229  FDKAACDecContext *s = avctx->priv_data;
230  AAC_DECODER_ERROR err;
231 
232  s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
233  if (!s->handle) {
234  av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
235  return AVERROR_UNKNOWN;
236  }
237 
238  if (avctx->extradata_size) {
239  if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
240  &avctx->extradata_size)) != AAC_DEC_OK) {
241  av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
242  return AVERROR_INVALIDDATA;
243  }
244  }
245 
246  if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
247  s->conceal_method)) != AAC_DEC_OK) {
248  av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
249  return AVERROR_UNKNOWN;
250  }
251 
252  if (avctx->request_channel_layout > 0 &&
254  int downmix_channels = -1;
255 
256  switch (avctx->request_channel_layout) {
257  case AV_CH_LAYOUT_STEREO:
259  downmix_channels = 2;
260  break;
261  case AV_CH_LAYOUT_MONO:
262  downmix_channels = 1;
263  break;
264  default:
265  av_log(avctx, AV_LOG_WARNING, "Invalid request_channel_layout\n");
266  break;
267  }
268 
269  if (downmix_channels != -1) {
270  if (aacDecoder_SetParam(s->handle, AAC_PCM_MAX_OUTPUT_CHANNELS,
271  downmix_channels) != AAC_DEC_OK) {
272  av_log(avctx, AV_LOG_WARNING, "Unable to set output channels in the decoder\n");
273  } else {
275  if (!s->anc_buffer) {
276  av_log(avctx, AV_LOG_ERROR, "Unable to allocate ancillary buffer for the decoder\n");
277  return AVERROR(ENOMEM);
278  }
279  if (aacDecoder_AncDataInit(s->handle, s->anc_buffer, DMX_ANC_BUFFSIZE)) {
280  av_log(avctx, AV_LOG_ERROR, "Unable to register downmix ancillary buffer in the decoder\n");
281  return AVERROR_UNKNOWN;
282  }
283  }
284  }
285  }
286 
287  if (s->drc_boost != -1) {
288  if (aacDecoder_SetParam(s->handle, AAC_DRC_BOOST_FACTOR, s->drc_boost) != AAC_DEC_OK) {
289  av_log(avctx, AV_LOG_ERROR, "Unable to set DRC boost factor in the decoder\n");
290  return AVERROR_UNKNOWN;
291  }
292  }
293 
294  if (s->drc_cut != -1) {
295  if (aacDecoder_SetParam(s->handle, AAC_DRC_ATTENUATION_FACTOR, s->drc_cut) != AAC_DEC_OK) {
296  av_log(avctx, AV_LOG_ERROR, "Unable to set DRC attenuation factor in the decoder\n");
297  return AVERROR_UNKNOWN;
298  }
299  }
300 
301  if (s->drc_level != -1) {
302  // This option defaults to -1, i.e. not calling
303  // aacDecoder_SetParam(AAC_DRC_REFERENCE_LEVEL) at all, which defaults
304  // to the level from DRC metadata, if available. The user can set
305  // -drc_level -2, which calls aacDecoder_SetParam(
306  // AAC_DRC_REFERENCE_LEVEL) with a negative value, which then
307  // explicitly disables the feature.
308  if (aacDecoder_SetParam(s->handle, AAC_DRC_REFERENCE_LEVEL, s->drc_level) != AAC_DEC_OK) {
309  av_log(avctx, AV_LOG_ERROR, "Unable to set DRC reference level in the decoder\n");
310  return AVERROR_UNKNOWN;
311  }
312  }
313 
314  if (s->drc_heavy != -1) {
315  if (aacDecoder_SetParam(s->handle, AAC_DRC_HEAVY_COMPRESSION, s->drc_heavy) != AAC_DEC_OK) {
316  av_log(avctx, AV_LOG_ERROR, "Unable to set DRC heavy compression in the decoder\n");
317  return AVERROR_UNKNOWN;
318  }
319  }
320 
321 #if FDKDEC_VER_AT_LEAST(2, 5) // 2.5.10
322  // Setting this parameter to -1 enables the auto behaviour in the library.
323  if (aacDecoder_SetParam(s->handle, AAC_PCM_LIMITER_ENABLE, s->level_limit) != AAC_DEC_OK) {
324  av_log(avctx, AV_LOG_ERROR, "Unable to set in signal level limiting in the decoder\n");
325  return AVERROR_UNKNOWN;
326  }
327 #endif
328 
329 #if FDKDEC_VER_AT_LEAST(3, 0) // 3.0.0
330  if (s->drc_effect != -1) {
331  if (aacDecoder_SetParam(s->handle, AAC_UNIDRC_SET_EFFECT, s->drc_effect) != AAC_DEC_OK) {
332  av_log(avctx, AV_LOG_ERROR, "Unable to set DRC effect type in the decoder\n");
333  return AVERROR_UNKNOWN;
334  }
335  }
336 #endif
337 
338  avctx->sample_fmt = AV_SAMPLE_FMT_S16;
339 
342  if (!s->decoder_buffer)
343  return AVERROR(ENOMEM);
344 
345  return 0;
346 }
347 
348 static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
349  int *got_frame_ptr, AVPacket *avpkt)
350 {
351  FDKAACDecContext *s = avctx->priv_data;
352  AVFrame *frame = data;
353  int ret;
354  AAC_DECODER_ERROR err;
355  UINT valid = avpkt->size;
356 
357  err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
358  if (err != AAC_DEC_OK) {
359  av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
360  return AVERROR_INVALIDDATA;
361  }
362 
363  err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) s->decoder_buffer, s->decoder_buffer_size / sizeof(INT_PCM), 0);
364  if (err == AAC_DEC_NOT_ENOUGH_BITS) {
365  ret = avpkt->size - valid;
366  goto end;
367  }
368  if (err != AAC_DEC_OK) {
369  av_log(avctx, AV_LOG_ERROR,
370  "aacDecoder_DecodeFrame() failed: %x\n", err);
371  ret = AVERROR_UNKNOWN;
372  goto end;
373  }
374 
375  if ((ret = get_stream_info(avctx)) < 0)
376  goto end;
377  frame->nb_samples = avctx->frame_size;
378 
379  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
380  goto end;
381 
382  if (frame->pts != AV_NOPTS_VALUE)
383  frame->pts -= av_rescale_q(s->output_delay,
384  (AVRational){1, avctx->sample_rate},
385  avctx->time_base);
386 
387  memcpy(frame->extended_data[0], s->decoder_buffer,
388  avctx->channels * avctx->frame_size *
390 
391  *got_frame_ptr = 1;
392  ret = avpkt->size - valid;
393 
394 end:
395  return ret;
396 }
397 
399 {
400  FDKAACDecContext *s = avctx->priv_data;
401  AAC_DECODER_ERROR err;
402 
403  if (!s->handle)
404  return;
405 
406  if ((err = aacDecoder_SetParam(s->handle,
407  AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
408  av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
409 }
410 
412  .name = "libfdk_aac",
413  .long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
414  .type = AVMEDIA_TYPE_AUDIO,
415  .id = AV_CODEC_ID_AAC,
416  .priv_data_size = sizeof(FDKAACDecContext),
419  .close = fdk_aac_decode_close,
422  .priv_class = &fdk_aac_dec_class,
423  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
425  .wrapper_name = "libfdk",
426 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define DECODER_BUFFSIZE
Definition: libfdk-aacdec.c:66
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVOption.
Definition: opt.h:246
static void flush(AVCodecContext *avctx)
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int size
Definition: packet.h:356
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
Definition: codec.h:102
#define AV_CH_LAYOUT_STEREO
#define DMX_ANC_BUFFSIZE
Definition: libfdk-aacdec.c:64
AVCodec.
Definition: codec.h:190
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:649
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1194
uint8_t
#define OFFSET(x)
Definition: libfdk-aacdec.c:68
#define av_cold
Definition: attributes.h:88
#define av_malloc(s)
#define AD
Definition: libfdk-aacdec.c:69
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:627
#define AV_CH_LOW_FREQUENCY
static AVFrame * frame
const char data[16]
Definition: mxf.c:91
uint8_t * data
Definition: packet.h:355
static int get_stream_info(AVCodecContext *avctx)
#define AV_CH_BACK_LEFT
#define av_log(a,...)
HANDLE_AACDECODER handle
Definition: libfdk-aacdec.c:49
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
AVCodec ff_libfdk_aac_decoder
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:197
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1237
#define AAC_PCM_MAX_OUTPUT_CHANNELS
Definition: libfdk-aacdec.c:37
uint8_t * decoder_buffer
Definition: libfdk-aacdec.c:50
ConcealMethod
Definition: libfdk-aacdec.c:40
audio channel layout utility functions
#define AV_CH_LAYOUT_STEREO_DOWNMIX
static const AVOption fdk_aac_dec_options[]
Definition: libfdk-aacdec.c:70
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_CH_FRONT_LEFT_OF_CENTER
#define AV_CH_FRONT_CENTER
static const uint8_t channel_counts[7]
Definition: dca_lbr.c:109
#define FF_ARRAY_ELEMS(a)
#define AV_CH_FRONT_RIGHT_OF_CENTER
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:1206
Libavcodec external API header.
int sample_rate
samples per second
Definition: avcodec.h:1186
static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static const AVClass fdk_aac_dec_class
Definition: libfdk-aacdec.c:94
#define AV_CH_LAYOUT_NATIVE
Channel mask value used for AVCodecContext.request_channel_layout to indicate that the user requests ...
main external API structure.
Definition: avcodec.h:526
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1854
int extradata_size
Definition: avcodec.h:628
Describe the class of an AVClass context structure.
Definition: log.h:67
Rational number (pair of numerator and denominator).
Definition: rational.h:58
uint8_t * anc_buffer
Definition: libfdk-aacdec.c:52
#define AV_CH_BACK_CENTER
#define AV_CH_SIDE_RIGHT
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
common internal api header.
static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)
common internal and external API header
signed 16 bits
Definition: samplefmt.h:61
static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
void * priv_data
Definition: avcodec.h:553
int channels
number of audio channels
Definition: avcodec.h:1187
#define DECODER_MAX_CHANNELS
Definition: libfdk-aacdec.c:65
#define av_freep(p)
#define AV_CH_SIDE_LEFT
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:347
#define AV_CH_LAYOUT_MONO
uint64_t request_channel_layout
Request decoder to use this channel layout if it can (0 for default)
Definition: avcodec.h:1244
This structure stores compressed data.
Definition: packet.h:332
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:366
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_CH_BACK_RIGHT