FFmpeg
dcadec.c
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1 /*
2  * Copyright (C) 2016 foo86
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/opt.h"
23 
24 #include "dcadec.h"
25 #include "dcahuff.h"
26 #include "dca_syncwords.h"
27 #include "profiles.h"
28 
29 #define MIN_PACKET_SIZE 16
30 #define MAX_PACKET_SIZE 0x104000
31 
32 int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask)
33 {
34  static const uint8_t dca2wav_norm[28] = {
35  2, 0, 1, 9, 10, 3, 8, 4, 5, 9, 10, 6, 7, 12,
36  13, 14, 3, 6, 7, 11, 12, 14, 16, 15, 17, 8, 4, 5,
37  };
38 
39  static const uint8_t dca2wav_wide[28] = {
40  2, 0, 1, 4, 5, 3, 8, 4, 5, 9, 10, 6, 7, 12,
41  13, 14, 3, 9, 10, 11, 12, 14, 16, 15, 17, 8, 4, 5,
42  };
43 
44  int dca_ch, wav_ch, nchannels = 0;
45 
47  for (dca_ch = 0; dca_ch < DCA_SPEAKER_COUNT; dca_ch++)
48  if (dca_mask & (1U << dca_ch))
49  ch_remap[nchannels++] = dca_ch;
50  avctx->channel_layout = dca_mask;
51  } else {
52  int wav_mask = 0;
53  int wav_map[18];
54  const uint8_t *dca2wav;
55  if (dca_mask == DCA_SPEAKER_LAYOUT_7POINT0_WIDE ||
57  dca2wav = dca2wav_wide;
58  else
59  dca2wav = dca2wav_norm;
60  for (dca_ch = 0; dca_ch < 28; dca_ch++) {
61  if (dca_mask & (1 << dca_ch)) {
62  wav_ch = dca2wav[dca_ch];
63  if (!(wav_mask & (1 << wav_ch))) {
64  wav_map[wav_ch] = dca_ch;
65  wav_mask |= 1 << wav_ch;
66  }
67  }
68  }
69  for (wav_ch = 0; wav_ch < 18; wav_ch++)
70  if (wav_mask & (1 << wav_ch))
71  ch_remap[nchannels++] = wav_map[wav_ch];
72  avctx->channel_layout = wav_mask;
73  }
74 
75  avctx->channels = nchannels;
76  return nchannels;
77 }
78 
80  int *coeff_l, int nsamples, int ch_mask)
81 {
82  int pos, spkr, max_spkr = av_log2(ch_mask);
83  int *coeff_r = coeff_l + av_popcount(ch_mask);
84 
85  av_assert0(DCA_HAS_STEREO(ch_mask));
86 
87  // Scale left and right channels
88  pos = (ch_mask & DCA_SPEAKER_MASK_C);
89  dcadsp->dmix_scale(samples[DCA_SPEAKER_L], coeff_l[pos ], nsamples);
90  dcadsp->dmix_scale(samples[DCA_SPEAKER_R], coeff_r[pos + 1], nsamples);
91 
92  // Downmix remaining channels
93  for (spkr = 0; spkr <= max_spkr; spkr++) {
94  if (!(ch_mask & (1U << spkr)))
95  continue;
96 
97  if (*coeff_l && spkr != DCA_SPEAKER_L)
98  dcadsp->dmix_add(samples[DCA_SPEAKER_L], samples[spkr],
99  *coeff_l, nsamples);
100 
101  if (*coeff_r && spkr != DCA_SPEAKER_R)
102  dcadsp->dmix_add(samples[DCA_SPEAKER_R], samples[spkr],
103  *coeff_r, nsamples);
104 
105  coeff_l++;
106  coeff_r++;
107  }
108 }
109 
111  int *coeff_l, int nsamples, int ch_mask)
112 {
113  int pos, spkr, max_spkr = av_log2(ch_mask);
114  int *coeff_r = coeff_l + av_popcount(ch_mask);
115  const float scale = 1.0f / (1 << 15);
116 
117  av_assert0(DCA_HAS_STEREO(ch_mask));
118 
119  // Scale left and right channels
120  pos = (ch_mask & DCA_SPEAKER_MASK_C);
122  coeff_l[pos ] * scale, nsamples);
124  coeff_r[pos + 1] * scale, nsamples);
125 
126  // Downmix remaining channels
127  for (spkr = 0; spkr <= max_spkr; spkr++) {
128  if (!(ch_mask & (1U << spkr)))
129  continue;
130 
131  if (*coeff_l && spkr != DCA_SPEAKER_L)
133  *coeff_l * scale, nsamples);
134 
135  if (*coeff_r && spkr != DCA_SPEAKER_R)
137  *coeff_r * scale, nsamples);
138 
139  coeff_l++;
140  coeff_r++;
141  }
142 }
143 
144 static int dcadec_decode_frame(AVCodecContext *avctx, void *data,
145  int *got_frame_ptr, AVPacket *avpkt)
146 {
147  DCAContext *s = avctx->priv_data;
148  AVFrame *frame = data;
149  uint8_t *input = avpkt->data;
150  int input_size = avpkt->size;
151  int i, ret, prev_packet = s->packet;
152  uint32_t mrk;
153 
154  if (input_size < MIN_PACKET_SIZE || input_size > MAX_PACKET_SIZE) {
155  av_log(avctx, AV_LOG_ERROR, "Invalid packet size\n");
156  return AVERROR_INVALIDDATA;
157  }
158 
159  // Convert input to BE format
160  mrk = AV_RB32(input);
161  if (mrk != DCA_SYNCWORD_CORE_BE && mrk != DCA_SYNCWORD_SUBSTREAM) {
162  av_fast_padded_malloc(&s->buffer, &s->buffer_size, input_size);
163  if (!s->buffer)
164  return AVERROR(ENOMEM);
165 
166  for (i = 0, ret = AVERROR_INVALIDDATA; i < input_size - MIN_PACKET_SIZE + 1 && ret < 0; i++)
167  ret = avpriv_dca_convert_bitstream(input + i, input_size - i, s->buffer, s->buffer_size);
168 
169  if (ret < 0) {
170  av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n");
171  return ret;
172  }
173 
174  input = s->buffer;
175  input_size = ret;
176  }
177 
178  s->packet = 0;
179 
180  // Parse backward compatible core sub-stream
182  int frame_size;
183 
184  if ((ret = ff_dca_core_parse(&s->core, input, input_size)) < 0)
185  return ret;
186 
187  s->packet |= DCA_PACKET_CORE;
188 
189  // EXXS data must be aligned on 4-byte boundary
190  frame_size = FFALIGN(s->core.frame_size, 4);
191  if (input_size - 4 > frame_size) {
192  input += frame_size;
193  input_size -= frame_size;
194  }
195  }
196 
197  if (!s->core_only) {
198  DCAExssAsset *asset = NULL;
199 
200  // Parse extension sub-stream (EXSS)
202  if ((ret = ff_dca_exss_parse(&s->exss, input, input_size)) < 0) {
203  if (avctx->err_recognition & AV_EF_EXPLODE)
204  return ret;
205  } else {
206  s->packet |= DCA_PACKET_EXSS;
207  asset = &s->exss.assets[0];
208  }
209  }
210 
211  // Parse XLL component in EXSS
212  if (asset && (asset->extension_mask & DCA_EXSS_XLL)) {
213  if ((ret = ff_dca_xll_parse(&s->xll, input, asset)) < 0) {
214  // Conceal XLL synchronization error
215  if (ret == AVERROR(EAGAIN)
216  && (prev_packet & DCA_PACKET_XLL)
217  && (s->packet & DCA_PACKET_CORE))
218  s->packet |= DCA_PACKET_XLL | DCA_PACKET_RECOVERY;
219  else if (ret == AVERROR(ENOMEM) || (avctx->err_recognition & AV_EF_EXPLODE))
220  return ret;
221  } else {
222  s->packet |= DCA_PACKET_XLL;
223  }
224  }
225 
226  // Parse LBR component in EXSS
227  if (asset && (asset->extension_mask & DCA_EXSS_LBR)) {
228  if ((ret = ff_dca_lbr_parse(&s->lbr, input, asset)) < 0) {
229  if (ret == AVERROR(ENOMEM) || (avctx->err_recognition & AV_EF_EXPLODE))
230  return ret;
231  } else {
232  s->packet |= DCA_PACKET_LBR;
233  }
234  }
235 
236  // Parse core extensions in EXSS or backward compatible core sub-stream
237  if ((s->packet & DCA_PACKET_CORE)
238  && (ret = ff_dca_core_parse_exss(&s->core, input, asset)) < 0)
239  return ret;
240  }
241 
242  // Filter the frame
243  if (s->packet & DCA_PACKET_LBR) {
244  if ((ret = ff_dca_lbr_filter_frame(&s->lbr, frame)) < 0)
245  return ret;
246  } else if (s->packet & DCA_PACKET_XLL) {
247  if (s->packet & DCA_PACKET_CORE) {
248  int x96_synth = -1;
249 
250  // Enable X96 synthesis if needed
251  if (s->xll.chset[0].freq == 96000 && s->core.sample_rate == 48000)
252  x96_synth = 1;
253 
254  if ((ret = ff_dca_core_filter_fixed(&s->core, x96_synth)) < 0)
255  return ret;
256 
257  // Force lossy downmixed output on the first core frame filtered.
258  // This prevents audible clicks when seeking and is consistent with
259  // what reference decoder does when there are multiple channel sets.
260  if (!(prev_packet & DCA_PACKET_RESIDUAL) && s->xll.nreschsets > 0
261  && s->xll.nchsets > 1) {
262  av_log(avctx, AV_LOG_VERBOSE, "Forcing XLL recovery mode\n");
263  s->packet |= DCA_PACKET_RECOVERY;
264  }
265 
266  // Set 'residual ok' flag for the next frame
267  s->packet |= DCA_PACKET_RESIDUAL;
268  }
269 
270  if ((ret = ff_dca_xll_filter_frame(&s->xll, frame)) < 0) {
271  // Fall back to core unless hard error
272  if (!(s->packet & DCA_PACKET_CORE))
273  return ret;
275  return ret;
276  if ((ret = ff_dca_core_filter_frame(&s->core, frame)) < 0)
277  return ret;
278  }
279  } else if (s->packet & DCA_PACKET_CORE) {
280  if ((ret = ff_dca_core_filter_frame(&s->core, frame)) < 0)
281  return ret;
282  if (s->core.filter_mode & DCA_FILTER_MODE_FIXED)
283  s->packet |= DCA_PACKET_RESIDUAL;
284  } else {
285  av_log(avctx, AV_LOG_ERROR, "No valid DCA sub-stream found\n");
286  if (s->core_only)
287  av_log(avctx, AV_LOG_WARNING, "Consider disabling 'core_only' option\n");
288  return AVERROR_INVALIDDATA;
289  }
290 
291  *got_frame_ptr = 1;
292 
293  return avpkt->size;
294 }
295 
297 {
298  DCAContext *s = avctx->priv_data;
299 
300  ff_dca_core_flush(&s->core);
301  ff_dca_xll_flush(&s->xll);
302  ff_dca_lbr_flush(&s->lbr);
303 
304  s->packet &= DCA_PACKET_MASK;
305 }
306 
308 {
309  DCAContext *s = avctx->priv_data;
310 
311  ff_dca_core_close(&s->core);
312  ff_dca_xll_close(&s->xll);
313  ff_dca_lbr_close(&s->lbr);
314 
315  av_freep(&s->buffer);
316  s->buffer_size = 0;
317 
318  return 0;
319 }
320 
322 {
323  DCAContext *s = avctx->priv_data;
324 
325  s->avctx = avctx;
326  s->core.avctx = avctx;
327  s->exss.avctx = avctx;
328  s->xll.avctx = avctx;
329  s->lbr.avctx = avctx;
330 
332 
333  if (ff_dca_core_init(&s->core) < 0)
334  return AVERROR(ENOMEM);
335 
336  if (ff_dca_lbr_init(&s->lbr) < 0)
337  return AVERROR(ENOMEM);
338 
339  ff_dcadsp_init(&s->dcadsp);
340  s->core.dcadsp = &s->dcadsp;
341  s->xll.dcadsp = &s->dcadsp;
342  s->lbr.dcadsp = &s->dcadsp;
343 
345 
346  switch (avctx->request_channel_layout & ~AV_CH_LAYOUT_NATIVE) {
347  case 0:
348  s->request_channel_layout = 0;
349  break;
350  case AV_CH_LAYOUT_STEREO:
352  s->request_channel_layout = DCA_SPEAKER_LAYOUT_STEREO;
353  break;
355  s->request_channel_layout = DCA_SPEAKER_LAYOUT_5POINT0;
356  break;
358  s->request_channel_layout = DCA_SPEAKER_LAYOUT_5POINT1;
359  break;
360  default:
361  av_log(avctx, AV_LOG_WARNING, "Invalid request_channel_layout\n");
362  break;
363  }
364 
365  return 0;
366 }
367 
368 #define OFFSET(x) offsetof(DCAContext, x)
369 #define PARAM AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
370 
371 static const AVOption dcadec_options[] = {
372  { "core_only", "Decode core only without extensions", OFFSET(core_only), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, PARAM },
373  { NULL }
374 };
375 
376 static const AVClass dcadec_class = {
377  .class_name = "DCA decoder",
378  .item_name = av_default_item_name,
379  .option = dcadec_options,
380  .version = LIBAVUTIL_VERSION_INT,
381  .category = AV_CLASS_CATEGORY_DECODER,
382 };
383 
385  .name = "dca",
386  .long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"),
387  .type = AVMEDIA_TYPE_AUDIO,
388  .id = AV_CODEC_ID_DTS,
389  .priv_data_size = sizeof(DCAContext),
390  .init = dcadec_init,
392  .close = dcadec_close,
393  .flush = dcadec_flush,
397  .priv_class = &dcadec_class,
399  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
400 };
AVCodec
AVCodec.
Definition: avcodec.h:3481
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
dcadec_decode_frame
static int dcadec_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: dcadec.c:144
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
dcadec_close
static av_cold int dcadec_close(AVCodecContext *avctx)
Definition: dcadec.c:307
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
AV_CLASS_CATEGORY_DECODER
@ AV_CLASS_CATEGORY_DECODER
Definition: log.h:36
AVCodecContext::channel_layout
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2276
ff_dca_core_parse_exss
int ff_dca_core_parse_exss(DCACoreDecoder *s, uint8_t *data, DCAExssAsset *asset)
Definition: dca_core.c:1831
DCA_SPEAKER_LAYOUT_5POINT0
#define DCA_SPEAKER_LAYOUT_5POINT0
Definition: dca.h:129
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:686
ff_dca_core_close
av_cold void ff_dca_core_close(DCACoreDecoder *s)
Definition: dca_core.c:2430
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2694
ff_dca_xll_parse
int ff_dca_xll_parse(DCAXllDecoder *s, uint8_t *data, DCAExssAsset *asset)
Definition: dca_xll.c:1161
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
DCA_PACKET_LBR
#define DCA_PACKET_LBR
Definition: dcadec.h:40
AVPacket::data
uint8_t * data
Definition: avcodec.h:1477
AVOption
AVOption.
Definition: opt.h:246
AV_SAMPLE_FMT_S32P
@ AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:68
data
const char data[16]
Definition: mxf.c:91
DCA_SPEAKER_LAYOUT_STEREO
#define DCA_SPEAKER_LAYOUT_STEREO
Definition: dca.h:123
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
DCA_PACKET_XLL
#define DCA_PACKET_XLL
Definition: dcadec.h:39
AVCodecContext::request_channel_layout
uint64_t request_channel_layout
Request decoder to use this channel layout if it can (0 for default)
Definition: avcodec.h:2283
DCA_FILTER_MODE_FIXED
#define DCA_FILTER_MODE_FIXED
Definition: dca_core.h:57
dcadec_init
static av_cold int dcadec_init(AVCodecContext *avctx)
Definition: dcadec.c:321
DCAExssAsset
Definition: dca_exss.h:29
DCA_PACKET_RECOVERY
#define DCA_PACKET_RECOVERY
Sync error recovery flag.
Definition: dcadec.h:43
ff_dca_core_filter_frame
int ff_dca_core_filter_frame(DCACoreDecoder *s, AVFrame *frame)
Definition: dca_core.c:2345
avpriv_dca_convert_bitstream
int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, int max_size)
Convert bitstream to one representation based on sync marker.
Definition: dca.c:54
DCA_EXSS_XLL
@ DCA_EXSS_XLL
Definition: dca.h:180
U
#define U(x)
Definition: vp56_arith.h:37
ff_dca_profiles
const AVProfile ff_dca_profiles[]
Definition: profiles.c:38
dcadec_flush
static av_cold void dcadec_flush(AVCodecContext *avctx)
Definition: dcadec.c:296
DCA_SPEAKER_MASK_C
@ DCA_SPEAKER_MASK_C
Definition: dca.h:92
DCA_SPEAKER_LAYOUT_7POINT1_WIDE
#define DCA_SPEAKER_LAYOUT_7POINT1_WIDE
Definition: dca.h:132
ff_dca_downmix_to_stereo_float
void ff_dca_downmix_to_stereo_float(AVFloatDSPContext *fdsp, float **samples, int *coeff_l, int nsamples, int ch_mask)
Definition: dcadec.c:110
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:86
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_cold
#define av_cold
Definition: attributes.h:84
ff_dca_downmix_to_stereo_fixed
void ff_dca_downmix_to_stereo_fixed(DCADSPContext *dcadsp, int32_t **samples, int *coeff_l, int nsamples, int ch_mask)
Definition: dcadec.c:79
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
dcadec_options
static const AVOption dcadec_options[]
Definition: dcadec.c:371
s
#define s(width, name)
Definition: cbs_vp9.c:257
DCA_SPEAKER_LAYOUT_7POINT0_WIDE
#define DCA_SPEAKER_LAYOUT_7POINT0_WIDE
Definition: dca.h:131
DCA_SPEAKER_LAYOUT_5POINT1
#define DCA_SPEAKER_LAYOUT_5POINT1
Definition: dca.h:130
frame_size
int frame_size
Definition: mxfenc.c:2215
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CH_LAYOUT_STEREO_DOWNMIX
#define AV_CH_LAYOUT_STEREO_DOWNMIX
Definition: channel_layout.h:112
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
DCADSPContext::dmix_scale
void(* dmix_scale)(int32_t *dst, int scale, ptrdiff_t len)
Definition: dcadsp.h:81
dcadec.h
dca_syncwords.h
int32_t
int32_t
Definition: audio_convert.c:194
ff_dca_set_channel_layout
int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask)
Definition: dcadec.c:32
ff_dca_lbr_filter_frame
int ff_dca_lbr_filter_frame(DCALbrDecoder *s, AVFrame *frame)
Definition: dca_lbr.c:1734
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
DCA_HAS_STEREO
#define DCA_HAS_STEREO(mask)
Definition: dca.h:134
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:500
NULL
#define NULL
Definition: coverity.c:32
AVFloatDSPContext::vector_fmul_scalar
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float.
Definition: float_dsp.h:85
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
profiles.h
AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_5POINT1
Definition: channel_layout.h:96
ff_dca_init_vlcs
av_cold void ff_dca_init_vlcs(void)
Definition: dcahuff.c:1263
OFFSET
#define OFFSET(x)
Definition: dcadec.c:368
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2705
DCA_PACKET_CORE
#define DCA_PACKET_CORE
Definition: dcadec.h:37
DCADSPContext
Definition: dcadsp.h:30
AV_CODEC_CAP_CHANNEL_CONF
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
Definition: avcodec.h:1033
DCA_SYNCWORD_CORE_BE
#define DCA_SYNCWORD_CORE_BE
Definition: dca_syncwords.h:22
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:981
dcahuff.h
AVPacket::size
int size
Definition: avcodec.h:1478
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:188
ff_dcadsp_init
av_cold void ff_dcadsp_init(DCADSPContext *s)
Definition: dcadsp.c:459
PARAM
#define PARAM
Definition: dcadec.c:369
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: avcodec.h:568
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
ff_dca_core_parse
int ff_dca_core_parse(DCACoreDecoder *s, uint8_t *data, int size)
Definition: dca_core.c:1798
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:92
AVFloatDSPContext
Definition: float_dsp.h:24
DCA_PACKET_RESIDUAL
#define DCA_PACKET_RESIDUAL
Core valid for residual decoding.
Definition: dcadec.h:44
av_crc_get_table
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
DCA_SPEAKER_R
@ DCA_SPEAKER_R
Definition: dca.h:79
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:2226
ff_dca_core_init
av_cold int ff_dca_core_init(DCACoreDecoder *s)
Definition: dca_core.c:2412
AV_CH_LAYOUT_5POINT0
#define AV_CH_LAYOUT_5POINT0
Definition: channel_layout.h:95
DCADSPContext::dmix_add
void(* dmix_add)(int32_t *dst, const int32_t *src, int coeff, ptrdiff_t len)
Definition: dcadsp.h:79
ff_dca_exss_parse
int ff_dca_exss_parse(DCAExssParser *s, const uint8_t *data, int size)
Definition: dca_exss.c:378
DCAContext
Definition: dcadec.h:46
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AV_CRC_16_CCITT
@ AV_CRC_16_CCITT
Definition: crc.h:52
AVFloatDSPContext::vector_fmac_scalar
void(* vector_fmac_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float and add to destination vector.
Definition: float_dsp.h:54
FF_CODEC_CAP_INIT_CLEANUP
#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
AV_CH_LAYOUT_NATIVE
#define AV_CH_LAYOUT_NATIVE
Channel mask value used for AVCodecContext.request_channel_layout to indicate that the user requests ...
Definition: channel_layout.h:78
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
av_fast_padded_malloc
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:70
uint8_t
uint8_t
Definition: audio_convert.c:194
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3488
ff_dca_lbr_init
av_cold int ff_dca_lbr_init(DCALbrDecoder *s)
Definition: dca_lbr.c:1818
DCA_SYNCWORD_SUBSTREAM
#define DCA_SYNCWORD_SUBSTREAM
Definition: dca_syncwords.h:32
ff_dca_core_filter_fixed
int ff_dca_core_filter_fixed(DCACoreDecoder *s, int x96_synth)
Definition: dca_core.c:1959
ff_dca_xll_filter_frame
int ff_dca_xll_filter_frame(DCAXllDecoder *s, AVFrame *frame)
Definition: dca_xll.c:1322
ff_dca_lbr_flush
av_cold void ff_dca_lbr_flush(DCALbrDecoder *s)
Definition: dca_lbr.c:1794
ret
ret
Definition: filter_design.txt:187
DCA_PACKET_EXSS
#define DCA_PACKET_EXSS
Definition: dcadec.h:38
ff_dca_lbr_close
av_cold void ff_dca_lbr_close(DCALbrDecoder *s)
Definition: dca_lbr.c:1829
AVClass::class_name
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
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
dcadec_class
static const AVClass dcadec_class
Definition: dcadec.c:376
AVCodecContext
main external API structure.
Definition: avcodec.h:1565
channel_layout.h
MAX_PACKET_SIZE
#define MAX_PACKET_SIZE
Definition: dcadec.c:30
DCA_PACKET_MASK
#define DCA_PACKET_MASK
Definition: dcadec.h:41
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
ff_dca_lbr_parse
int ff_dca_lbr_parse(DCALbrDecoder *s, uint8_t *data, DCAExssAsset *asset)
Definition: dca_lbr.c:1167
ff_dca_decoder
AVCodec ff_dca_decoder
Definition: dcadec.c:384
DCAExssAsset::extension_mask
int extension_mask
Coding components used in asset.
Definition: dca_exss.h:45
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
MIN_PACKET_SIZE
#define MIN_PACKET_SIZE
Definition: dcadec.c:29
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1592
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1454
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:240
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
ff_dca_xll_flush
av_cold void ff_dca_xll_flush(DCAXllDecoder *s)
Definition: dca_xll.c:1471
DCA_SPEAKER_COUNT
@ DCA_SPEAKER_COUNT
Definition: dca.h:88
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
DCA_SPEAKER_L
@ DCA_SPEAKER_L
Definition: dca.h:79
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
ff_dca_xll_close
av_cold void ff_dca_xll_close(DCAXllDecoder *s)
Definition: dca_xll.c:1476
DCA_EXSS_LBR
@ DCA_EXSS_LBR
Definition: dca.h:179
ff_dca_core_flush
av_cold void ff_dca_core_flush(DCACoreDecoder *s)
Definition: dca_core.c:2399