FFmpeg
mov_chan.c
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1 /*
2  * Copyright (c) 2011 Justin Ruggles
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 /**
22  * mov 'chan' tag reading/writing.
23  * @author Justin Ruggles
24  */
25 
26 #include <assert.h>
27 #include <stdint.h>
28 
29 #include "libavutil/avassert.h"
31 #include "libavutil/mem.h"
32 #include "libavcodec/codec_id.h"
33 #include "mov_chan.h"
34 
35 enum {
52  // = AV_CHAN_TOP_BACK_CENTER,
61  // = AV_CHAN_TOP_SIDE_LEFT,
62  // = AV_CHAN_TOP_SIDE_RIGHT,
63  // = AV_CHAN_BOTTOM_FRONT_CENTER,
64  // = AV_CHAN_BOTTOM_FRONT_LEFT,
65  // = AV_CHAN_BOTTOM_FRONT_RIGHT,
70  /* The following have no exact counterparts */
76 };
77 
78 enum {
97  // = AV_CHAN_STEREO_LEFT,
98  // = AV_CHAN_STEREO_RIGHT,
111  /* The following have no exact counterparts */
114 };
115 
117  union {
118  uint32_t tag;
119  enum AVChannel id;
120  };
121 };
122 
123 #define TAG(_tag, _cnt) {.tag = _tag}
124 #define ID(_0) {.id = c_##_0}
125 #define CHLIST01(_tag, _1) CHLIST(_tag, 1, ID(_1))
126 #define CHLIST02(_tag, _1, _2) CHLIST(_tag, 2, ID(_1), ID(_2))
127 #define CHLIST03(_tag, _1, _2, _3) CHLIST(_tag, 3, ID(_1), ID(_2), ID(_3))
128 #define CHLIST04(_tag, _1, _2, _3, _4) CHLIST(_tag, 4, ID(_1), ID(_2), ID(_3), ID(_4))
129 #define CHLIST05(_tag, _1, _2, _3, _4, _5) CHLIST(_tag, 5, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5))
130 #define CHLIST06(_tag, _1, _2, _3, _4, _5, _6) CHLIST(_tag, 6, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6))
131 #define CHLIST07(_tag, _1, _2, _3, _4, _5, _6, _7) CHLIST(_tag, 7, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7))
132 #define CHLIST08(_tag, _1, _2, _3, _4, _5, _6, _7, _8) CHLIST(_tag, 8, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8))
133 #define CHLIST09(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9) CHLIST(_tag, 9, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9))
134 #define CHLIST16(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16) \
135  CHLIST(_tag, 16, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \
136  ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16))
137 #define CHLIST21(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21) \
138  CHLIST(_tag, 21, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \
139  ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16), ID(_17), ID(_18), ID(_19), ID(_20), ID(_21))
140 #define CHLIST24(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24) \
141  CHLIST(_tag, 24, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \
142  ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16), ID(_17), ID(_18), ID(_19), ID(_20), \
143  ID(_21), ID(_22), ID(_23), ID(_24))
144 
145 #define MOV_CH_LAYOUT_MAP \
146  CHLIST01( MOV_CH_LAYOUT_MONO, C )\
147  CHLIST02( MOV_CH_LAYOUT_STEREO, L, R )\
148  CHLIST02( MOV_CH_LAYOUT_STEREOHEADPHONES, L, R )\
149  CHLIST02( MOV_CH_LAYOUT_BINAURAL, L, R )\
150  CHLIST02( MOV_CH_LAYOUT_MIDSIDE, L, R )\
151  CHLIST02( MOV_CH_LAYOUT_XY, L, R )\
152  CHLIST02( MOV_CH_LAYOUT_MATRIXSTEREO, Lt, Rt )\
153  CHLIST02( MOV_CH_LAYOUT_AC3_1_0_1, C, LFE )\
154  CHLIST03( MOV_CH_LAYOUT_MPEG_3_0_A, L, R, C )\
155  CHLIST03( MOV_CH_LAYOUT_MPEG_3_0_B, C, L, R )\
156  CHLIST03( MOV_CH_LAYOUT_AC3_3_0, L, C, R )\
157  CHLIST03( MOV_CH_LAYOUT_ITU_2_1, L, R, Cs )\
158  CHLIST03( MOV_CH_LAYOUT_DVD_4, L, R, LFE )\
159  CHLIST04( MOV_CH_LAYOUT_AMBISONIC_B_FORMAT, W, X, Y, Z )\
160  CHLIST04( MOV_CH_LAYOUT_QUADRAPHONIC, L, R, Rls, Rrs )\
161  CHLIST04( MOV_CH_LAYOUT_MPEG_4_0_A, L, R, C, Cs )\
162  CHLIST04( MOV_CH_LAYOUT_MPEG_4_0_B, C, L, R, Cs )\
163  CHLIST04( MOV_CH_LAYOUT_AC3_3_1, L, C, R, Cs )\
164  CHLIST04( MOV_CH_LAYOUT_ITU_2_2, L, R, Ls, Rs )\
165  CHLIST04( MOV_CH_LAYOUT_DVD_5, L, R, LFE, Cs )\
166  CHLIST04( MOV_CH_LAYOUT_AC3_2_1_1, L, R, Cs, LFE )\
167  CHLIST04( MOV_CH_LAYOUT_DVD_10, L, R, C, LFE )\
168  CHLIST04( MOV_CH_LAYOUT_AC3_3_0_1, L, C, R, LFE )\
169  CHLIST04( MOV_CH_LAYOUT_DTS_3_1, C, L, R, LFE )\
170  CHLIST05( MOV_CH_LAYOUT_PENTAGONAL, L, R, Rls, Rrs, C )\
171  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_A, L, R, C, Ls, Rs )\
172  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_B, L, R, Ls, Rs, C )\
173  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_C, L, C, R, Ls, Rs )\
174  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_D, C, L, R, Ls, Rs )\
175  CHLIST05( MOV_CH_LAYOUT_DVD_6, L, R, LFE, Ls, Rs )\
176  CHLIST05( MOV_CH_LAYOUT_DVD_18, L, R, Ls, Rs, LFE )\
177  CHLIST05( MOV_CH_LAYOUT_DVD_11, L, R, C, LFE, Cs )\
178  CHLIST05( MOV_CH_LAYOUT_AC3_3_1_1, L, C, R, Cs, LFE )\
179  CHLIST05( MOV_CH_LAYOUT_DTS_4_1, C, L, R, Cs, LFE )\
180  CHLIST06( MOV_CH_LAYOUT_HEXAGONAL, L, R, Rls, Rrs, C, Cs )\
181  CHLIST06( MOV_CH_LAYOUT_DTS_6_0_C, C, Cs, L, R, Rls, Rrs )\
182  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_A, L, R, C, LFE, Ls, Rs )\
183  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_B, L, R, Ls, Rs, C, LFE )\
184  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_C, L, C, R, Ls, Rs, LFE )\
185  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_D, C, L, R, Ls, Rs, LFE )\
186  CHLIST06( MOV_CH_LAYOUT_AUDIOUNIT_6_0, L, R, Ls, Rs, C, Cs )\
187  CHLIST06( MOV_CH_LAYOUT_AAC_6_0, C, L, R, Ls, Rs, Cs )\
188  CHLIST06( MOV_CH_LAYOUT_EAC3_6_0_A, L, C, R, Ls, Rs, Cs )\
189  CHLIST06( MOV_CH_LAYOUT_DTS_6_0_A, Lc, Rc, L, R, Ls, Rs )\
190  CHLIST06( MOV_CH_LAYOUT_DTS_6_0_B, C, L, R, Rls, Rrs, Ts )\
191  CHLIST07( MOV_CH_LAYOUT_MPEG_6_1_A, L, R, C, LFE, Ls, Rs, Cs )\
192  CHLIST07( MOV_CH_LAYOUT_AAC_6_1, C, L, R, Ls, Rs, Cs, LFE )\
193  CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_A, L, C, R, Ls, Rs, LFE, Cs )\
194  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_D, C, L, R, Ls, Rs, LFE, Cs )\
195  CHLIST07( MOV_CH_LAYOUT_AUDIOUNIT_7_0, L, R, Ls, Rs, C, Rls, Rrs )\
196  CHLIST07( MOV_CH_LAYOUT_AAC_7_0, C, L, R, Ls, Rs, Rls, Rrs )\
197  CHLIST07( MOV_CH_LAYOUT_EAC3_7_0_A, L, C, R, Ls, Rs, Rls, Rrs )\
198  CHLIST07( MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT, L, R, Ls, Rs, C, Lc, Rc )\
199  CHLIST07( MOV_CH_LAYOUT_DTS_7_0, Lc, C, Rc, L, R, Ls, Rs )\
200  CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_B, L, C, R, Ls, Rs, LFE, Ts )\
201  CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_C, L, C, R, Ls, Rs, LFE, Vhc )\
202  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_A, Lc, Rc, L, R, Ls, Rs, LFE )\
203  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_B, C, L, R, Rls, Rrs, Ts, LFE )\
204  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_C, C, Cs, L, R, Rls, Rrs, LFE )\
205  CHLIST08( MOV_CH_LAYOUT_OCTAGONAL, L, R, Rls, Rrs, C, Cs, Ls, Rs )\
206  CHLIST08( MOV_CH_LAYOUT_AAC_OCTAGONAL, C, L, R, Ls, Rs, Rls, Rrs, Cs )\
207  CHLIST08( MOV_CH_LAYOUT_CUBE, L, R, Rls, Rrs, Vhl, Vhr, Rlt, Rrt )\
208  CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_A, L, R, C, LFE, Ls, Rs, Lc, Rc )\
209  CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_B, C, Lc, Rc, L, R, Ls, Rs, LFE )\
210  CHLIST08( MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1, L, R, Ls, Rs, C, LFE, Lc, Rc )\
211  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_B, L, C, R, Ls, Rs, LFE, Lc, Rc )\
212  CHLIST08( MOV_CH_LAYOUT_DTS_7_1, Lc, C, Rc, L, R, Ls, Rs, LFE )\
213  CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_C, L, R, C, LFE, Ls, Rs, Rls, Rrs )\
214  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_A, L, C, R, Ls, Rs, LFE, Rls, Rrs )\
215  CHLIST08( MOV_CH_LAYOUT_SMPTE_DTV, L, R, C, LFE, Ls, Rs, Lt, Rt )\
216  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_C, L, C, R, Ls, Rs, LFE, Lsd, Rsd )\
217  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_D, L, C, R, Ls, Rs, LFE, Lw, Rw )\
218  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_E, L, C, R, Ls, Rs, LFE, Vhl, Vhr )\
219  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_F, L, C, R, Ls, Rs, LFE, Cs, Ts )\
220  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_G, L, C, R, Ls, Rs, LFE, Cs, Vhc )\
221  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_H, L, C, R, Ls, Rs, LFE, Ts, Vhc )\
222  CHLIST08( MOV_CH_LAYOUT_DTS_8_0_A, Lc, Rc, L, R, Ls, Rs, Rls, Rrs )\
223  CHLIST08( MOV_CH_LAYOUT_DTS_8_0_B, Lc, C, Rc, L, R, Ls, Cs, Rs )\
224  CHLIST09( MOV_CH_LAYOUT_DTS_8_1_A, Lc, Rc, L, R, Ls, Rs, Rls, Rrs, LFE )\
225  CHLIST09( MOV_CH_LAYOUT_DTS_8_1_B, Lc, C, Rc, L, R, Ls, Cs, Rs, LFE )\
226  CHLIST16( MOV_CH_LAYOUT_TMH_10_2_STD, L, R, C, Vhc, Lsd, Rsd, Ls, Rs, Vhl, Vhr, Lw, Rw, Csd, Cs, LFE1, LFE2 )\
227  CHLIST21( MOV_CH_LAYOUT_TMH_10_2_FULL, L, R, C, Vhc, Lsd, Rsd, Ls, Rs, Vhl, Vhr, Lw, Rw, Csd, Cs, LFE1, LFE2, Lc, Rc, HI, VI, Haptic )\
228 
229 #define CHLIST(_tag, _cnt, ...) static_assert((_tag & 0xffff) == _cnt, "Channel count of " #_tag " is not " #_cnt);
231 #undef CHLIST
232 #define CHLIST(_tag, _cnt, ...) TAG(_tag, _cnt), __VA_ARGS__,
233 static const struct MovChannelLayoutMap mov_ch_layout_map[] = {
235  { {0} },
236 };
237 
238 #undef ID
239 #undef TAG
240 #define ID(_0) {.id = iso_##_0}
241 #define TAG(_tag, _cnt) {.tag = (_tag << 16) | _cnt}
242 
243 /* ISO/IEC 23001-8 */
244 static const struct MovChannelLayoutMap iso_ch_layout_map[] = {
245  CHLIST01( 1, C )
246  CHLIST02( 2, L, R )
247  CHLIST03( 3, C, L, R )
248  CHLIST04( 4, C, L, R, Cs )
249  CHLIST05( 5, C, L, R, Ls, Rs )
250  CHLIST06( 6, C, L, R, Ls, Rs, LFE )
251  CHLIST08( 7, C, Lc, Rc, L, R, Ls, Rs, LFE )
252  CHLIST03( 9, L, R, Cs )
253  CHLIST04( 10, L, R, Ls, Rs )
254  CHLIST07( 11, C, L, R, Ls, Rs, Cs, LFE )
255  CHLIST08( 12, C, L, R, Ls, Rs, Lsr, Rsr, LFE )
256  CHLIST24( 13, C, Lc, Rc, L, R, Lss, Rss, Lsr, Rsr, Cs, LFE, LFE2, Cv, Lv, Rv, Lvss, Rvss, Ts, Lvr, Rvr, Cvr, Cb, Lb, Rb)
257  CHLIST08( 14, C, L, R, Ls, Rs, LFE, Lv, Rv)
258  { {0} },
259 };
260 
285  0,
286 };
287 
303  0,
304 };
305 
315  0,
316 };
317 
330  0,
331 };
332 
333 static const struct {
336 } mov_codec_ch_layouts[] = {
352  { AV_CODEC_ID_NONE, NULL },
353 };
354 
355 static const struct MovChannelLayoutMap* find_layout_map(uint32_t tag, const struct MovChannelLayoutMap *map)
356 {
357  for (int i = 0; map[i].tag & 0xffff; i += 1 + (map[i].tag & 0xffff))
358  if (map[i].tag == tag)
359  return &map[i + 1];
360  return NULL;
361 }
362 
363 /**
364  * Get the channel layout for the specified non-special channel layout tag if
365  * known.
366  *
367  * @param[in,out] ch_layout channel layout
368  * @param[in] tag channel layout tag
369  * @return <0 on error
370  */
371 static int mov_get_channel_layout(AVChannelLayout *ch_layout, uint32_t tag, uint64_t omitted_channel_map, const struct MovChannelLayoutMap *map)
372 {
373  const struct MovChannelLayoutMap *layout_map;
374 
375  /* find the channel layout for the specified layout tag */
376  layout_map = find_layout_map(tag, map);
377  if (layout_map) {
378  int ret;
379  int map_layout_nb_channels = tag & 0xFFFF;
380  int nb_channels = ch_layout->nb_channels;
381 
382  /* Omitted channel bits must not exceed number of channels in map */
383  if (omitted_channel_map >> map_layout_nb_channels)
384  return AVERROR_INVALIDDATA;
385 
386  av_channel_layout_uninit(ch_layout);
387  ret = av_channel_layout_custom_init(ch_layout, nb_channels);
388  if (ret < 0)
389  return ret;
390 
391  for (int i = 0, idx = 0; i < map_layout_nb_channels && idx < nb_channels; i++, omitted_channel_map >>= 1) {
392  if (!(omitted_channel_map & 1)) {
393  enum AVChannel id = layout_map[i].id;
394  ch_layout->u.map[idx++].id = (id != AV_CHAN_NONE ? id : AV_CHAN_UNKNOWN);
395  }
396  }
397 
399  }
400  return 0;
401 }
402 
403 static enum AVChannel mov_get_channel_id(uint32_t label)
404 {
405  if (label == 0)
406  return AV_CHAN_UNUSED;
407  if (label <= 18)
408  return (label - 1);
409  if (label == 35)
410  return AV_CHAN_WIDE_LEFT;
411  if (label == 36)
412  return AV_CHAN_WIDE_RIGHT;
413  if (label == 37)
415  if (label == 38)
416  return AV_CHAN_STEREO_LEFT;
417  if (label == 39)
418  return AV_CHAN_STEREO_RIGHT;
419  return AV_CHAN_UNKNOWN;
420 }
421 
423 {
424  if (channel < 0)
425  return 0;
427  return channel + 1;
428  if (channel == AV_CHAN_WIDE_LEFT)
429  return 35;
431  return 36;
433  return 37;
435  return 38;
437  return 39;
438  return 0;
439 }
440 
441 static int is_layout_valid_for_tag(const AVChannelLayout *ch_layout, uint32_t tag, const struct MovChannelLayoutMap *map)
442 {
443  const struct MovChannelLayoutMap *layout_map;
444  int channels = ch_layout->nb_channels;
445 
446  /* get the layout map based on the channel count */
447  if ((tag & 0xFFFF) != channels)
448  return 0;
449 
450  layout_map = find_layout_map(tag, map);
451  if (layout_map) {
452  int i;
453  for (i = 0; i < channels; i++) {
454  if (av_channel_layout_channel_from_index(ch_layout, i) != layout_map[i].id)
455  break;
456  }
457  if (i == channels)
458  return 1;
459  }
460  return 0;
461 }
462 
464  uint32_t *layout,
465  uint32_t *bitmap,
466  uint32_t **pchannel_desc)
467 {
468  int i;
469  uint32_t tag = 0;
470  const enum MovChannelLayoutTag *layouts = NULL;
471 
472  /* find the layout list for the specified codec */
473  for (i = 0; mov_codec_ch_layouts[i].codec_id != AV_CODEC_ID_NONE; i++) {
475  break;
476  }
478  layouts = mov_codec_ch_layouts[i].layouts;
479 
480  if (layouts) {
481  /* find the layout tag for the specified channel layout */
482  for (i = 0; layouts[i] != 0; i++)
484  break;
485 
486  tag = layouts[i];
487  }
488 
489  *layout = tag;
490  *bitmap = 0;
491  *pchannel_desc = NULL;
492 
493  /* if no tag was found, use channel bitmap or description as a backup if possible */
494  if (tag == 0) {
495  uint32_t *channel_desc;
497  par->ch_layout.u.mask < 0x40000) {
499  *bitmap = (uint32_t)par->ch_layout.u.mask;
500  return 0;
501  } else if (par->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC)
502  return AVERROR(ENOSYS);
503 
504  channel_desc = av_malloc_array(par->ch_layout.nb_channels, sizeof(*channel_desc));
505  if (!channel_desc)
506  return AVERROR(ENOMEM);
507 
508  for (i = 0; i < par->ch_layout.nb_channels; i++) {
509  channel_desc[i] =
511 
512  if (channel_desc[i] == 0) {
513  av_free(channel_desc);
514  return AVERROR(ENOSYS);
515  }
516  }
517 
518  *pchannel_desc = channel_desc;
519  }
520 
521  return 0;
522 }
523 
525  int64_t size)
526 {
527  uint32_t layout_tag, bitmap, num_descr;
528  int ret;
529  AVChannelLayout *ch_layout = &st->codecpar->ch_layout;
530 
531  if (size < 12)
532  return AVERROR_INVALIDDATA;
533 
534  layout_tag = avio_rb32(pb);
535  bitmap = avio_rb32(pb);
536  num_descr = avio_rb32(pb);
537 
538  av_log(s, AV_LOG_DEBUG, "chan: layout=%"PRIu32" "
539  "bitmap=%"PRIu32" num_descr=%"PRIu32"\n",
540  layout_tag, bitmap, num_descr);
541 
542  if (size < 12ULL + num_descr * 20ULL)
543  return 0;
544 
545  if (layout_tag == MOV_CH_LAYOUT_USE_DESCRIPTIONS) {
546  int nb_channels = ch_layout->nb_channels ? ch_layout->nb_channels : num_descr;
547  if (num_descr > nb_channels) {
548  av_log(s, AV_LOG_WARNING, "got %d channel descriptions, capping to the number of channels %d\n",
549  num_descr, nb_channels);
550  num_descr = nb_channels;
551  }
552 
553  av_channel_layout_uninit(ch_layout);
554  ret = av_channel_layout_custom_init(ch_layout, nb_channels);
555  if (ret < 0)
556  goto out;
557 
558  for (int i = 0; i < num_descr; i++) {
559  uint32_t label;
560  if (pb->eof_reached) {
562  "reached EOF while reading channel layout\n");
563  return AVERROR_INVALIDDATA;
564  }
565  label = avio_rb32(pb); // mChannelLabel
566  avio_rb32(pb); // mChannelFlags
567  avio_rl32(pb); // mCoordinates[0]
568  avio_rl32(pb); // mCoordinates[1]
569  avio_rl32(pb); // mCoordinates[2]
570  size -= 20;
571  ch_layout->u.map[i].id = mov_get_channel_id(label);
572  }
573 
575  if (ret < 0)
576  goto out;
577  } else if (layout_tag == MOV_CH_LAYOUT_USE_BITMAP) {
578  if (!ch_layout->nb_channels || av_popcount(bitmap) == ch_layout->nb_channels) {
579  if (bitmap < 0x40000) {
580  av_channel_layout_uninit(ch_layout);
581  av_channel_layout_from_mask(ch_layout, bitmap);
582  }
583  } else {
584  av_log(s, AV_LOG_WARNING, "ignoring channel layout bitmap with %d channels because number of channels is %d\n",
585  av_popcount64(bitmap), ch_layout->nb_channels);
586  }
587  } else if (layout_tag & 0xFFFF) {
588  int nb_channels = layout_tag & 0xFFFF;
589  if (!ch_layout->nb_channels)
590  ch_layout->nb_channels = nb_channels;
591  if (nb_channels == ch_layout->nb_channels) {
592  ret = mov_get_channel_layout(ch_layout, layout_tag, 0, mov_ch_layout_map);
593  if (ret < 0)
594  return ret;
595  } else {
596  av_log(s, AV_LOG_WARNING, "ignoring layout tag with %d channels because number of channels is %d\n",
597  nb_channels, ch_layout->nb_channels);
598  }
599  }
600  ret = 0;
601 
602 out:
603  avio_skip(pb, size - 12);
604 
605  return ret;
606 }
607 
608 /* ISO/IEC 23001-8, table 8 */
609 static const enum AVChannel iso_channel_position[] = {
610  [0] = AV_CHAN_FRONT_LEFT, // left front
611  [1] = AV_CHAN_FRONT_RIGHT, // right front
612  [2] = AV_CHAN_FRONT_CENTER, // centre front
613  [3] = AV_CHAN_LOW_FREQUENCY, // low frequency enhancement
614  [4] = AV_CHAN_SIDE_LEFT, // left surround
615  [5] = AV_CHAN_SIDE_RIGHT, // right surround
616  [6] = AV_CHAN_FRONT_LEFT_OF_CENTER, // left front centre
617  [7] = AV_CHAN_FRONT_RIGHT_OF_CENTER, // right front centre
618  [8] = AV_CHAN_BACK_LEFT, // rear surround left
619  [9] = AV_CHAN_BACK_RIGHT, // rear surround right
620  [10] = AV_CHAN_BACK_CENTER, // rear centre
621  [11] = AV_CHAN_SURROUND_DIRECT_LEFT, // left surround direct
622  [12] = AV_CHAN_SURROUND_DIRECT_RIGHT, // right surround direct
623  [13] = AV_CHAN_SIDE_SURROUND_LEFT, // left side surround
624  [14] = AV_CHAN_SIDE_SURROUND_RIGHT, // right side surround
625  [15] = AV_CHAN_WIDE_LEFT, // left wide front
626  [16] = AV_CHAN_WIDE_RIGHT, // right wide front
627  [17] = AV_CHAN_TOP_FRONT_LEFT, // left front vertical height
628  [18] = AV_CHAN_TOP_FRONT_RIGHT, // right front vertical height
629  [19] = AV_CHAN_TOP_FRONT_CENTER, // centre front vertical height
630  [20] = AV_CHAN_TOP_BACK_LEFT, // left surround vertical height rear
631  [21] = AV_CHAN_TOP_BACK_RIGHT, // right surround vertical height rear
632  [22] = AV_CHAN_TOP_BACK_CENTER, // centre vertical height rear
633  [23] = AV_CHAN_TOP_SIDE_LEFT, // left vertical height side surround
634  [24] = AV_CHAN_TOP_SIDE_RIGHT, // right vertical height side surround
635  [25] = AV_CHAN_TOP_CENTER, // top centre surround
636  [26] = AV_CHAN_LOW_FREQUENCY_2, // low frequency enhancement 2
637  [27] = AV_CHAN_BOTTOM_FRONT_LEFT, // left front vertical bottom
638  [28] = AV_CHAN_BOTTOM_FRONT_RIGHT, // right front vertical bottom
639  [29] = AV_CHAN_BOTTOM_FRONT_CENTER, // centre front vertical bottom
640  [30] = AV_CHAN_TOP_SURROUND_LEFT, // left vertical height surround
641  [31] = AV_CHAN_TOP_SURROUND_RIGHT, // right vertical height surround
642 
643  [32] = AV_CHAN_NONE, // reserved
644  [33] = AV_CHAN_NONE, // reserved
645  [34] = AV_CHAN_NONE, // reserved
646  [35] = AV_CHAN_NONE, // reserved
647 
648  [36] = AV_CHAN_NONE, // low frequency enhancement 3
649  [37] = AV_CHAN_NONE, // left edge of screen
650  [38] = AV_CHAN_NONE, // right edge of screen
651  [39] = AV_CHAN_NONE, // half-way between centre of screen and left edge of screen
652  [40] = AV_CHAN_NONE, // half-way between centre of screen and right edge of screen
653  [41] = AV_CHAN_NONE, // left back surround
654  [42] = AV_CHAN_NONE, // right back surround
655 
656  // 43 - 125: reserved
657  // 126: explicit position
658  // 127: unknown /undefined
659 };
660 
662 {
663  // Set default value which means any setup in 23001-8
664  *config = 0;
665  for (int i = 0; iso_ch_layout_map[i].tag & 0xffff; i += 1 + (iso_ch_layout_map[i].tag & 0xffff)) {
667  *config = iso_ch_layout_map[i].tag >> 16;
668  break;
669  }
670  }
671 
672  return 0;
673 }
674 
675 int ff_mov_get_channel_layout_from_config(int config, AVChannelLayout *layout, uint64_t omitted_channel_map)
676 {
677  if (config > 0) {
678  uint32_t layout_tag;
679  int nb_omitted_channels = av_popcount64(omitted_channel_map);
680 
681  if (layout->nb_channels <= 0 || layout->nb_channels > UINT16_MAX - nb_omitted_channels)
682  return AVERROR_INVALIDDATA;
683 
684  layout_tag = (config << 16) | (layout->nb_channels + nb_omitted_channels);
685  return mov_get_channel_layout(layout, layout_tag, omitted_channel_map, iso_ch_layout_map);
686  }
687  return 1;
688 }
689 
691  uint8_t *position, int position_num)
692 {
693  enum AVChannel channel;
694 
695  if (position_num < layout->nb_channels)
696  return AVERROR(EINVAL);
697 
698  for (int i = 0; i < layout->nb_channels; i++) {
699  position[i] = 127;
701  if (channel == AV_CHAN_NONE)
702  return AVERROR(EINVAL);
703 
704  for (int j = 0; j < FF_ARRAY_ELEMS(iso_channel_position); j++) {
705  if (iso_channel_position[j] == channel) {
706  position[i] = j;
707  break;
708  }
709  }
710  if (position[i] == 127)
711  return AVERROR(EINVAL);
712  }
713 
714  return 0;
715 }
716 
718 {
719  int stream_structure = avio_r8(pb);
720  int ret;
721 
722  // stream carries channels
723  if (stream_structure & 1) {
724  int layout = avio_r8(pb);
725 
726  av_log(s, AV_LOG_TRACE, "'chnl' layout %d\n", layout);
727  if (!layout) {
728  AVChannelLayout *ch_layout = &st->codecpar->ch_layout;
729  int nb_channels = ch_layout->nb_channels;
730 
731  av_channel_layout_uninit(ch_layout);
732  ret = av_channel_layout_custom_init(ch_layout, nb_channels);
733  if (ret < 0)
734  return ret;
735 
736  for (int i = 0; i < nb_channels; i++) {
737  int speaker_pos = avio_r8(pb);
738  enum AVChannel channel;
739 
740  if (speaker_pos == 126) // explicit position
741  avio_skip(pb, 3); // azimuth, elevation
742 
743  if (speaker_pos >= FF_ARRAY_ELEMS(iso_channel_position))
745  else
746  channel = iso_channel_position[speaker_pos];
747 
748  if (channel == AV_CHAN_NONE) {
749  av_log(s, AV_LOG_WARNING, "speaker position %d is not implemented\n", speaker_pos);
751  }
752 
753  ch_layout->u.map[i].id = channel;
754  }
755 
757  if (ret < 0)
758  return ret;
759  } else {
760  uint64_t omitted_channel_map = avio_rb64(pb);
761  ret = ff_mov_get_channel_layout_from_config(layout, &st->codecpar->ch_layout, omitted_channel_map);
762  if (ret < 0)
763  return ret;
764  }
765  }
766 
767  // stream carries objects
768  if (stream_structure & 2) {
769  int obj_count = avio_r8(pb);
770  av_log(s, AV_LOG_TRACE, "'chnl' with object_count %d\n", obj_count);
771  }
772 
773  return 0;
774 }
MOV_CH_LAYOUT_QUADRAPHONIC
@ MOV_CH_LAYOUT_QUADRAPHONIC
Definition: mov_chan.h:64
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:328
mov_codec_ch_layouts
static const struct @374 mov_codec_ch_layouts[]
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AV_CODEC_ID_PCM_F32BE
@ AV_CODEC_ID_PCM_F32BE
Definition: codec_id.h:348
c_LFE2
@ c_LFE2
Definition: mov_chan.c:60
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:443
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
MOV_CH_LAYOUT_MPEG_5_1_A
@ MOV_CH_LAYOUT_MPEG_5_1_A
Definition: mov_chan.h:77
ff_mov_get_channel_layout_from_config
int ff_mov_get_channel_layout_from_config(int config, AVChannelLayout *layout, uint64_t omitted_channel_map)
Get AVChannelLayout from ISO/IEC 23001-8 ChannelConfiguration.
Definition: mov_chan.c:675
c_Y
@ c_Y
Definition: mov_chan.c:67
out
FILE * out
Definition: movenc.c:55
codec_id
enum AVCodecID codec_id
Definition: mov_chan.c:334
iso_Lss
@ iso_Lss
Definition: mov_chan.c:109
iso_ch_layout_map
static const struct MovChannelLayoutMap iso_ch_layout_map[]
Definition: mov_chan.c:244
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:47
iso_Cv
@ iso_Cv
Definition: mov_chan.c:92
av_popcount64
#define av_popcount64
Definition: common.h:157
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:335
AV_CHAN_WIDE_LEFT
@ AV_CHAN_WIDE_LEFT
Definition: channel_layout.h:72
MOV_CH_LAYOUT_DTS_8_0_A
@ MOV_CH_LAYOUT_DTS_8_0_A
Definition: mov_chan.h:134
AVChannelLayout::map
AVChannelCustom * map
This member must be used when the channel order is AV_CHANNEL_ORDER_CUSTOM.
Definition: channel_layout.h:362
iso_Rsr
@ iso_Rsr
Definition: mov_chan.c:84
c_C
@ c_C
Definition: mov_chan.c:38
c_W
@ c_W
Definition: mov_chan.c:66
AV_CHAN_TOP_SURROUND_LEFT
@ AV_CHAN_TOP_SURROUND_LEFT
+110 degrees, Lvs, TpLS
Definition: channel_layout.h:84
iso_Rsd
@ iso_Rsd
Definition: mov_chan.c:102
iso_Lvss
@ iso_Lvss
Definition: mov_chan.c:104
MOV_CH_LAYOUT_AC3_3_0_1
@ MOV_CH_LAYOUT_AC3_3_0_1
Definition: mov_chan.h:107
av_channel_layout_channel_from_index
enum AVChannel av_channel_layout_channel_from_index(const AVChannelLayout *channel_layout, unsigned int idx)
Get the channel with the given index in a channel layout.
Definition: channel_layout.c:668
c_L
@ c_L
Definition: mov_chan.c:36
iso_Lsd
@ iso_Lsd
Definition: mov_chan.c:101
R
#define R
Definition: huffyuv.h:44
AV_CODEC_ID_ALAC
@ AV_CODEC_ID_ALAC
Definition: codec_id.h:456
mov_ch_layout_map
static const struct MovChannelLayoutMap mov_ch_layout_map[]
Definition: mov_chan.c:233
CHLIST01
#define CHLIST01(_tag, _1)
Definition: mov_chan.c:125
c_Lw
@ c_Lw
Definition: mov_chan.c:56
iso_Ts
@ iso_Ts
Definition: mov_chan.c:90
MOV_CH_LAYOUT_ITU_2_1
@ MOV_CH_LAYOUT_ITU_2_1
Definition: mov_chan.h:87
AVChannelLayout::order
enum AVChannelOrder order
Channel order used in this layout.
Definition: channel_layout.h:316
MOV_CH_LAYOUT_AAC_7_0
@ MOV_CH_LAYOUT_AAC_7_0
Definition: mov_chan.h:100
AVChannelLayout::mask
uint64_t mask
This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used for AV_CHANNEL_ORDER_AMBISONIC ...
Definition: channel_layout.h:343
av_popcount
#define av_popcount
Definition: common.h:154
CHLIST24
#define CHLIST24(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24)
Definition: mov_chan.c:140
ff_mov_get_channel_layout_tag
int ff_mov_get_channel_layout_tag(const AVCodecParameters *par, uint32_t *layout, uint32_t *bitmap, uint32_t **pchannel_desc)
Get the channel layout tag for the specified codec id and channel layout.
Definition: mov_chan.c:463
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:321
tf_sess_config.config
config
Definition: tf_sess_config.py:33
c_Lt
@ c_Lt
Definition: mov_chan.c:54
MOV_CH_LAYOUT_AC3_3_0
@ MOV_CH_LAYOUT_AC3_3_0
Definition: mov_chan.h:105
MOV_CH_LAYOUT_DTS_6_0_A
@ MOV_CH_LAYOUT_DTS_6_0_A
Definition: mov_chan.h:125
mov_get_channel_layout
static int mov_get_channel_layout(AVChannelLayout *ch_layout, uint32_t tag, uint64_t omitted_channel_map, const struct MovChannelLayoutMap *map)
Get the channel layout for the specified non-special channel layout tag if known.
Definition: mov_chan.c:371
MOV_CH_LAYOUT_MATRIXSTEREO
@ MOV_CH_LAYOUT_MATRIXSTEREO
Definition: mov_chan.h:59
iso_Lvr
@ iso_Lvr
Definition: mov_chan.c:94
iso_Rs
@ iso_Rs
Definition: mov_chan.c:89
c_Rrt
@ c_Rrt
Definition: mov_chan.c:53
AV_CHAN_SURROUND_DIRECT_LEFT
@ AV_CHAN_SURROUND_DIRECT_LEFT
Definition: channel_layout.h:74
MOV_CH_LAYOUT_MPEG_5_0_A
@ MOV_CH_LAYOUT_MPEG_5_0_A
Definition: mov_chan.h:73
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:329
AV_CHAN_TOP_BACK_RIGHT
@ AV_CHAN_TOP_BACK_RIGHT
Definition: channel_layout.h:67
c_LFE1
@ c_LFE1
Definition: mov_chan.c:71
iso_Cb
@ iso_Cb
Definition: mov_chan.c:106
c_R
@ c_R
Definition: mov_chan.c:37
MOV_CH_LAYOUT_MPEG_5_1_D
@ MOV_CH_LAYOUT_MPEG_5_1_D
Definition: mov_chan.h:80
mov_ch_layouts_alac
static enum MovChannelLayoutTag mov_ch_layouts_alac[]
Definition: mov_chan.c:306
c_Rw
@ c_Rw
Definition: mov_chan.c:57
MOV_CH_LAYOUT_MONO
@ MOV_CH_LAYOUT_MONO
Definition: mov_chan.h:56
iso_LFE2
@ iso_LFE2
Definition: mov_chan.c:103
AV_CHAN_STEREO_RIGHT
@ AV_CHAN_STEREO_RIGHT
See above.
Definition: channel_layout.h:71
MOV_CH_LAYOUT_ITU_2_2
@ MOV_CH_LAYOUT_ITU_2_2
Definition: mov_chan.h:88
C
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s your new playground is ready Some little details about what s going which in turn will define variables for the build system and the C
Definition: writing_filters.txt:58
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:332
avassert.h
AV_CHAN_BOTTOM_FRONT_LEFT
@ AV_CHAN_BOTTOM_FRONT_LEFT
Definition: channel_layout.h:80
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:761
AV_LOG_TRACE
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:206
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
c_Cs
@ c_Cs
Definition: mov_chan.c:44
MOV_CH_LAYOUT_AC3_1_0_1
@ MOV_CH_LAYOUT_AC3_1_0_1
Definition: mov_chan.h:104
iso_Rvss
@ iso_Rvss
Definition: mov_chan.c:105
iso_Lvs
@ iso_Lvs
Definition: mov_chan.c:112
codec_id.h
iso_C
@ iso_C
Definition: mov_chan.c:81
MOV_CH_LAYOUT_MPEG_5_1_C
@ MOV_CH_LAYOUT_MPEG_5_1_C
Definition: mov_chan.h:79
MOV_CH_LAYOUT_AAC_6_0
@ MOV_CH_LAYOUT_AAC_6_0
Definition: mov_chan.h:98
iso_Rc
@ iso_Rc
Definition: mov_chan.c:86
s
#define s(width, name)
Definition: cbs_vp9.c:198
find_layout_map
static const struct MovChannelLayoutMap * find_layout_map(uint32_t tag, const struct MovChannelLayoutMap *map)
Definition: mov_chan.c:355
AV_CHAN_UNKNOWN
@ AV_CHAN_UNKNOWN
Channel contains data, but its position is unknown.
Definition: channel_layout.h:91
AV_CHANNEL_ORDER_UNSPEC
@ AV_CHANNEL_ORDER_UNSPEC
Only the channel count is specified, without any further information about the channel order.
Definition: channel_layout.h:116
av_channel_layout_from_mask
int av_channel_layout_from_mask(AVChannelLayout *channel_layout, uint64_t mask)
Initialize a native channel layout from a bitmask indicating which channels are present.
Definition: channel_layout.c:247
AV_CHAN_SIDE_RIGHT
@ AV_CHAN_SIDE_RIGHT
Definition: channel_layout.h:60
MOV_CH_LAYOUT_AC3_3_1
@ MOV_CH_LAYOUT_AC3_3_1
Definition: mov_chan.h:106
c_Rt
@ c_Rt
Definition: mov_chan.c:55
CHLIST08
#define CHLIST08(_tag, _1, _2, _3, _4, _5, _6, _7, _8)
Definition: mov_chan.c:132
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
iso_Rv
@ iso_Rv
Definition: mov_chan.c:93
channels
channels
Definition: aptx.h:31
MOV_CH_LAYOUT_MPEG_7_1_B
@ MOV_CH_LAYOUT_MPEG_7_1_B
Definition: mov_chan.h:83
CHLIST04
#define CHLIST04(_tag, _1, _2, _3, _4)
Definition: mov_chan.c:128
iso_Lv
@ iso_Lv
Definition: mov_chan.c:91
c_Z
@ c_Z
Definition: mov_chan.c:68
AV_CHAN_TOP_SIDE_LEFT
@ AV_CHAN_TOP_SIDE_LEFT
Definition: channel_layout.h:77
AV_CHAN_TOP_SIDE_RIGHT
@ AV_CHAN_TOP_SIDE_RIGHT
Definition: channel_layout.h:78
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
AV_CHAN_SIDE_SURROUND_LEFT
@ AV_CHAN_SIDE_SURROUND_LEFT
+90 degrees, Lss, SiL
Definition: channel_layout.h:82
MOV_CH_LAYOUT_SMPTE_DTV
@ MOV_CH_LAYOUT_SMPTE_DTV
Definition: mov_chan.h:86
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
MovChannelLayoutTag
MovChannelLayoutTag
mov 'chan' tag reading/writing.
Definition: mov_chan.h:51
MOV_CH_LAYOUT_STEREO
@ MOV_CH_LAYOUT_STEREO
Definition: mov_chan.h:57
NULL
#define NULL
Definition: coverity.c:32
MOV_CH_LAYOUT_DTS_4_1
@ MOV_CH_LAYOUT_DTS_4_1
Definition: mov_chan.h:124
MOV_CH_LAYOUT_MAP
#define MOV_CH_LAYOUT_MAP
Definition: mov_chan.c:145
c_Rlt
@ c_Rlt
Definition: mov_chan.c:51
AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL
#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL
The specified retype target order is ignored and the simplest possible (canonical) order is used for ...
Definition: channel_layout.h:710
AVChannelLayout::u
union AVChannelLayout::@400 u
Details about which channels are present in this layout.
AV_CHAN_TOP_BACK_CENTER
@ AV_CHAN_TOP_BACK_CENTER
Definition: channel_layout.h:66
iso_Lw
@ iso_Lw
Definition: mov_chan.c:99
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:908
CHLIST05
#define CHLIST05(_tag, _1, _2, _3, _4, _5)
Definition: mov_chan.c:129
mov_get_channel_id
static enum AVChannel mov_get_channel_id(uint32_t label)
Definition: mov_chan.c:403
AV_CHAN_BOTTOM_FRONT_RIGHT
@ AV_CHAN_BOTTOM_FRONT_RIGHT
Definition: channel_layout.h:81
MOV_CH_LAYOUT_MPEG_3_0_B
@ MOV_CH_LAYOUT_MPEG_3_0_B
Definition: mov_chan.h:70
ff_mov_get_channel_positions_from_layout
int ff_mov_get_channel_positions_from_layout(const AVChannelLayout *layout, uint8_t *position, int position_num)
Get ISO/IEC 23001-8 OutputChannelPosition from AVChannelLayout.
Definition: mov_chan.c:690
c_X
@ c_X
Definition: mov_chan.c:69
iso_Ls
@ iso_Ls
Definition: mov_chan.c:88
AV_CHAN_TOP_CENTER
@ AV_CHAN_TOP_CENTER
Definition: channel_layout.h:61
c_Lc
@ c_Lc
Definition: mov_chan.c:42
c_Vhc
@ c_Vhc
Definition: mov_chan.c:49
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
MovChannelLayoutMap
Definition: mov_chan.c:116
AV_CHAN_FRONT_RIGHT_OF_CENTER
@ AV_CHAN_FRONT_RIGHT_OF_CENTER
Definition: channel_layout.h:57
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
AV_CHAN_FRONT_RIGHT
@ AV_CHAN_FRONT_RIGHT
Definition: channel_layout.h:51
AV_CHAN_FRONT_CENTER
@ AV_CHAN_FRONT_CENTER
Definition: channel_layout.h:52
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: codec_id.h:442
ff_mov_get_channel_config_from_layout
int ff_mov_get_channel_config_from_layout(const AVChannelLayout *layout, int *config)
Get ISO/IEC 23001-8 ChannelConfiguration from AVChannelLayout.
Definition: mov_chan.c:661
c_Lsd
@ c_Lsd
Definition: mov_chan.c:58
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:730
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AV_CODEC_ID_PCM_S24LE
@ AV_CODEC_ID_PCM_S24LE
Definition: codec_id.h:340
c_LFE
@ c_LFE
Definition: mov_chan.c:39
MOV_CH_LAYOUT_AAC_6_1
@ MOV_CH_LAYOUT_AAC_6_1
Definition: mov_chan.h:99
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:311
c_VI
@ c_VI
Definition: mov_chan.c:74
CHLIST07
#define CHLIST07(_tag, _1, _2, _3, _4, _5, _6, _7)
Definition: mov_chan.c:131
AV_CHAN_LOW_FREQUENCY
@ AV_CHAN_LOW_FREQUENCY
Definition: channel_layout.h:53
size
int size
Definition: twinvq_data.h:10344
AV_CHAN_BACK_RIGHT
@ AV_CHAN_BACK_RIGHT
Definition: channel_layout.h:55
AV_CHAN_SIDE_LEFT
@ AV_CHAN_SIDE_LEFT
Definition: channel_layout.h:59
MOV_CH_LAYOUT_MPEG_7_1_A
@ MOV_CH_LAYOUT_MPEG_7_1_A
Definition: mov_chan.h:82
iso_Rb
@ iso_Rb
Definition: mov_chan.c:108
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:603
av_channel_layout_retype
int av_channel_layout_retype(AVChannelLayout *channel_layout, enum AVChannelOrder order, int flags)
Change the AVChannelOrder of a channel layout.
Definition: channel_layout.c:880
MOV_CH_LAYOUT_DTS_6_1_A
@ MOV_CH_LAYOUT_DTS_6_1_A
Definition: mov_chan.h:128
MOV_CH_LAYOUT_MPEG_3_0_A
@ MOV_CH_LAYOUT_MPEG_3_0_A
Definition: mov_chan.h:69
AV_CHAN_TOP_FRONT_RIGHT
@ AV_CHAN_TOP_FRONT_RIGHT
Definition: channel_layout.h:64
c_Rls
@ c_Rls
Definition: mov_chan.c:40
AV_CHANNEL_ORDER_NATIVE
@ AV_CHANNEL_ORDER_NATIVE
The native channel order, i.e.
Definition: channel_layout.h:122
AV_CHAN_FRONT_LEFT_OF_CENTER
@ AV_CHAN_FRONT_LEFT_OF_CENTER
Definition: channel_layout.h:56
MOV_CH_LAYOUT_DVD_18
@ MOV_CH_LAYOUT_DVD_18
Definition: mov_chan.h:94
AV_CHAN_UNUSED
@ AV_CHAN_UNUSED
Channel is empty can be safely skipped.
Definition: channel_layout.h:88
iso_Lb
@ iso_Lb
Definition: mov_chan.c:107
av_channel_layout_custom_init
int av_channel_layout_custom_init(AVChannelLayout *channel_layout, int nb_channels)
Initialize a custom channel layout with the specified number of channels.
Definition: channel_layout.c:227
layout
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 layout
Definition: filter_design.txt:18
AVChannel
AVChannel
Definition: channel_layout.h:47
MOV_CH_LAYOUT_MPEG_5_0_D
@ MOV_CH_LAYOUT_MPEG_5_0_D
Definition: mov_chan.h:76
AV_CHAN_TOP_SURROUND_RIGHT
@ AV_CHAN_TOP_SURROUND_RIGHT
-110 degrees, Rvs, TpRS
Definition: channel_layout.h:85
AV_CHAN_SURROUND_DIRECT_RIGHT
@ AV_CHAN_SURROUND_DIRECT_RIGHT
Definition: channel_layout.h:75
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
c_Ls
@ c_Ls
Definition: mov_chan.c:45
iso_Cs
@ iso_Cs
Definition: mov_chan.c:87
c_Vhl
@ c_Vhl
Definition: mov_chan.c:48
iso_Cvr
@ iso_Cvr
Definition: mov_chan.c:95
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
CHLIST03
#define CHLIST03(_tag, _1, _2, _3)
Definition: mov_chan.c:127
AV_CODEC_ID_PCM_F64BE
@ AV_CODEC_ID_PCM_F64BE
Definition: codec_id.h:350
c_Haptic
@ c_Haptic
Definition: mov_chan.c:75
MOV_CH_LAYOUT_MPEG_6_1_A
@ MOV_CH_LAYOUT_MPEG_6_1_A
Definition: mov_chan.h:81
AV_CODEC_ID_PCM_S32BE
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:337
CHLIST06
#define CHLIST06(_tag, _1, _2, _3, _4, _5, _6)
Definition: mov_chan.c:130
MOV_CH_LAYOUT_AC3_2_1_1
@ MOV_CH_LAYOUT_AC3_2_1_1
Definition: mov_chan.h:108
AV_CHAN_STEREO_LEFT
@ AV_CHAN_STEREO_LEFT
Stereo downmix.
Definition: channel_layout.h:69
MOV_CH_LAYOUT_MPEG_4_0_B
@ MOV_CH_LAYOUT_MPEG_4_0_B
Definition: mov_chan.h:72
MovChannelLayoutMap::tag
uint32_t tag
Definition: mov_chan.c:118
iso_LFE
@ iso_LFE
Definition: mov_chan.c:82
MOV_CH_LAYOUT_MPEG_5_0_C
@ MOV_CH_LAYOUT_MPEG_5_0_C
Definition: mov_chan.h:75
mov_chan.h
tag
uint32_t tag
Definition: movenc.c:1852
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
c_Csd
@ c_Csd
Definition: mov_chan.c:72
MOV_CH_LAYOUT_DVD_4
@ MOV_CH_LAYOUT_DVD_4
Definition: mov_chan.h:89
c_HI
@ c_HI
Definition: mov_chan.c:73
id
enum AVCodecID id
Definition: dts2pts.c:365
c_Vhr
@ c_Vhr
Definition: mov_chan.c:50
AV_CHAN_BACK_CENTER
@ AV_CHAN_BACK_CENTER
Definition: channel_layout.h:58
AV_CHAN_NONE
@ AV_CHAN_NONE
Invalid channel index.
Definition: channel_layout.h:49
channel_layout.h
AV_CHAN_LOW_FREQUENCY_2
@ AV_CHAN_LOW_FREQUENCY_2
Definition: channel_layout.h:76
AV_CHAN_TOP_BACK_LEFT
@ AV_CHAN_TOP_BACK_LEFT
Definition: channel_layout.h:65
iso_Rvr
@ iso_Rvr
Definition: mov_chan.c:96
av_channel_layout_uninit
void av_channel_layout_uninit(AVChannelLayout *channel_layout)
Free any allocated data in the channel layout and reset the channel count to 0.
Definition: channel_layout.c:437
AV_CHAN_BACK_LEFT
@ AV_CHAN_BACK_LEFT
Definition: channel_layout.h:54
L
#define L(x)
Definition: vpx_arith.h:36
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:238
iso_Rss
@ iso_Rss
Definition: mov_chan.c:110
MOV_CH_LAYOUT_MPEG_7_1_C
@ MOV_CH_LAYOUT_MPEG_7_1_C
Definition: mov_chan.h:84
AV_CHAN_BOTTOM_FRONT_CENTER
@ AV_CHAN_BOTTOM_FRONT_CENTER
Definition: channel_layout.h:79
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
MovChannelLayoutMap::id
enum AVChannel id
Definition: mov_chan.c:119
is_layout_valid_for_tag
static int is_layout_valid_for_tag(const AVChannelLayout *ch_layout, uint32_t tag, const struct MovChannelLayoutMap *map)
Definition: mov_chan.c:441
iso_Rw
@ iso_Rw
Definition: mov_chan.c:100
c_Rc
@ c_Rc
Definition: mov_chan.c:43
mov_ch_layouts_aac
static enum MovChannelLayoutTag mov_ch_layouts_aac[]
Definition: mov_chan.c:261
MOV_CH_LAYOUT_AAC_OCTAGONAL
@ MOV_CH_LAYOUT_AAC_OCTAGONAL
Definition: mov_chan.h:101
iso_R
@ iso_R
Definition: mov_chan.c:80
iso_channel_position
static enum AVChannel iso_channel_position[]
Definition: mov_chan.c:609
iso_Lsr
@ iso_Lsr
Definition: mov_chan.c:83
AV_CHAN_TOP_FRONT_CENTER
@ AV_CHAN_TOP_FRONT_CENTER
Definition: channel_layout.h:63
AV_CODEC_ID_PCM_S32LE
@ AV_CODEC_ID_PCM_S32LE
Definition: codec_id.h:336
c_Ts
@ c_Ts
Definition: mov_chan.c:47
MOV_CH_LAYOUT_DTS_3_1
@ MOV_CH_LAYOUT_DTS_3_1
Definition: mov_chan.h:123
mov_get_channel_label
static uint32_t mov_get_channel_label(enum AVChannel channel)
Definition: mov_chan.c:422
AV_CHAN_SIDE_SURROUND_RIGHT
@ AV_CHAN_SIDE_SURROUND_RIGHT
-90 degrees, Rss, SiR
Definition: channel_layout.h:83
mem.h
AV_CHAN_WIDE_RIGHT
@ AV_CHAN_WIDE_RIGHT
Definition: channel_layout.h:73
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:333
CHLIST02
#define CHLIST02(_tag, _1, _2)
Definition: mov_chan.c:126
map
const VDPAUPixFmtMap * map
Definition: hwcontext_vdpau.c:71
MOV_CH_LAYOUT_AC3_3_1_1
@ MOV_CH_LAYOUT_AC3_3_1_1
Definition: mov_chan.h:109
AV_CODEC_ID_PCM_F64LE
@ AV_CODEC_ID_PCM_F64LE
Definition: codec_id.h:351
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
c_Rsd
@ c_Rsd
Definition: mov_chan.c:59
AV_CHAN_TOP_FRONT_LEFT
@ AV_CHAN_TOP_FRONT_LEFT
Definition: channel_layout.h:62
AV_CHAN_AMBISONIC_BASE
@ AV_CHAN_AMBISONIC_BASE
Range of channels between AV_CHAN_AMBISONIC_BASE and AV_CHAN_AMBISONIC_END represent Ambisonic compon...
Definition: channel_layout.h:105
ff_mov_read_chnl
int ff_mov_read_chnl(AVFormatContext *s, AVIOContext *pb, AVStream *st)
Read 'chnl' tag from the input stream.
Definition: mov_chan.c:717
AV_CODEC_ID_PCM_F32LE
@ AV_CODEC_ID_PCM_F32LE
Definition: codec_id.h:349
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AV_CHAN_FRONT_LEFT
@ AV_CHAN_FRONT_LEFT
Definition: channel_layout.h:50
iso_L
@ iso_L
Definition: mov_chan.c:79
mov_ch_layouts_wav
static enum MovChannelLayoutTag mov_ch_layouts_wav[]
Definition: mov_chan.c:318
AV_CODEC_ID_PCM_S24BE
@ AV_CODEC_ID_PCM_S24BE
Definition: codec_id.h:341
mov_ch_layouts_ac3
static enum MovChannelLayoutTag mov_ch_layouts_ac3[]
Definition: mov_chan.c:288
c_Rs
@ c_Rs
Definition: mov_chan.c:46
AVChannelCustom::id
enum AVChannel id
Definition: channel_layout.h:276
iso_Rvs
@ iso_Rvs
Definition: mov_chan.c:113
channel
channel
Definition: ebur128.h:39
iso_Lc
@ iso_Lc
Definition: mov_chan.c:85
c_Rrs
@ c_Rrs
Definition: mov_chan.c:41
MOV_CH_LAYOUT_USE_BITMAP
@ MOV_CH_LAYOUT_USE_BITMAP
Definition: mov_chan.h:54
MOV_CH_LAYOUT_USE_DESCRIPTIONS
@ MOV_CH_LAYOUT_USE_DESCRIPTIONS
Definition: mov_chan.h:53
ff_mov_read_chan
int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size)
Read 'chan' tag from the input stream.
Definition: mov_chan.c:524