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spdifenc.c
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1 /*
2  * IEC 61937 muxer
3  * Copyright (c) 2009 Bartlomiej Wolowiec
4  * Copyright (c) 2010 Anssi Hannula
5  * Copyright (c) 2010 Carl Eugen Hoyos
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 /**
25  * @file
26  * IEC-61937 encapsulation of various formats, used by S/PDIF
27  * @author Bartlomiej Wolowiec
28  * @author Anssi Hannula
29  * @author Carl Eugen Hoyos
30  */
31 
32 /*
33  * Terminology used in specification:
34  * data-burst - IEC61937 frame, contains header and encapsuled frame
35  * burst-preamble - IEC61937 frame header, contains 16-bit words named Pa, Pb, Pc and Pd
36  * burst-payload - encapsuled frame
37  * Pa, Pb - syncword - 0xF872, 0x4E1F
38  * Pc - burst-info, contains data-type (bits 0-6), error flag (bit 7), data-type-dependent info (bits 8-12)
39  * and bitstream number (bits 13-15)
40  * data-type - determines type of encapsuled frames
41  * Pd - length code (number of bits or bytes of encapsuled frame - according to data_type)
42  *
43  * IEC 61937 frames at normal usage start every specific count of bytes,
44  * dependent from data-type (spaces between packets are filled by zeros)
45  */
46 
47 #include <inttypes.h>
48 
49 #include "avformat.h"
50 #include "avio_internal.h"
51 #include "spdif.h"
52 #include "libavcodec/ac3.h"
53 #include "libavcodec/adts_parser.h"
54 #include "libavcodec/dca.h"
56 #include "libavutil/opt.h"
57 
58 typedef struct IEC61937Context {
59  const AVClass *av_class;
60  enum IEC61937DataType data_type;///< burst info - reference to type of payload of the data-burst
61  int length_code; ///< length code in bits or bytes, depending on data type
62  int pkt_offset; ///< data burst repetition period in bytes
63  uint8_t *buffer; ///< allocated buffer, used for swap bytes
64  int buffer_size; ///< size of allocated buffer
65 
66  uint8_t *out_buf; ///< pointer to the outgoing data before byte-swapping
67  int out_bytes; ///< amount of outgoing bytes
68 
69  int use_preamble; ///< preamble enabled (disabled for exactly pre-padded DTS)
70  int extra_bswap; ///< extra bswap for payload (for LE DTS => standard BE DTS)
71 
72  uint8_t *hd_buf; ///< allocated buffer to concatenate hd audio frames
73  int hd_buf_size; ///< size of the hd audio buffer
74  int hd_buf_count; ///< number of frames in the hd audio buffer
75  int hd_buf_filled; ///< amount of bytes in the hd audio buffer
76 
77  int dtshd_skip; ///< counter used for skipping DTS-HD frames
78 
79  /* AVOptions: */
82 #define SPDIF_FLAG_BIGENDIAN 0x01
84 
85  /// function, which generates codec dependent header information.
86  /// Sets data_type and pkt_offset, and length_code, out_bytes, out_buf if necessary
89 
90 static const AVOption options[] = {
91 { "spdif_flags", "IEC 61937 encapsulation flags", offsetof(IEC61937Context, spdif_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
92 { "be", "output in big-endian format (for use as s16be)", 0, AV_OPT_TYPE_CONST, {.i64 = SPDIF_FLAG_BIGENDIAN}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
93 { "dtshd_rate", "mux complete DTS frames in HD mode at the specified IEC958 rate (in Hz, default 0=disabled)", offsetof(IEC61937Context, dtshd_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 768000, AV_OPT_FLAG_ENCODING_PARAM },
94 { "dtshd_fallback_time", "min secs to strip HD for after an overflow (-1: till the end, default 60)", offsetof(IEC61937Context, dtshd_fallback), AV_OPT_TYPE_INT, {.i64 = 60}, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
95 { NULL },
96 };
97 
98 static const AVClass spdif_class = {
99  .class_name = "spdif",
100  .item_name = av_default_item_name,
101  .option = options,
102  .version = LIBAVUTIL_VERSION_INT,
103 };
104 
106 {
108  int bitstream_mode = pkt->data[5] & 0x7;
109 
110  ctx->data_type = IEC61937_AC3 | (bitstream_mode << 8);
111  ctx->pkt_offset = AC3_FRAME_SIZE << 2;
112  return 0;
113 }
114 
116 {
118  static const uint8_t eac3_repeat[4] = {6, 3, 2, 1};
119  int repeat = 1;
120 
121  int bsid = pkt->data[5] >> 3;
122  if (bsid > 10 && (pkt->data[4] & 0xc0) != 0xc0) /* fscod */
123  repeat = eac3_repeat[(pkt->data[4] & 0x30) >> 4]; /* numblkscod */
124 
125  ctx->hd_buf = av_fast_realloc(ctx->hd_buf, &ctx->hd_buf_size, ctx->hd_buf_filled + pkt->size);
126  if (!ctx->hd_buf)
127  return AVERROR(ENOMEM);
128 
129  memcpy(&ctx->hd_buf[ctx->hd_buf_filled], pkt->data, pkt->size);
130 
131  ctx->hd_buf_filled += pkt->size;
132  if (++ctx->hd_buf_count < repeat){
133  ctx->pkt_offset = 0;
134  return 0;
135  }
136  ctx->data_type = IEC61937_EAC3;
137  ctx->pkt_offset = 24576;
138  ctx->out_buf = ctx->hd_buf;
139  ctx->out_bytes = ctx->hd_buf_filled;
140  ctx->length_code = ctx->hd_buf_filled;
141 
142  ctx->hd_buf_count = 0;
143  ctx->hd_buf_filled = 0;
144  return 0;
145 }
146 
147 /*
148  * DTS type IV (DTS-HD) can be transmitted with various frame repetition
149  * periods; longer repetition periods allow for longer packets and therefore
150  * higher bitrate. Longer repetition periods mean that the constant bitrate of
151  * the output IEC 61937 stream is higher.
152  * The repetition period is measured in IEC 60958 frames (4 bytes).
153  */
154 static int spdif_dts4_subtype(int period)
155 {
156  switch (period) {
157  case 512: return 0x0;
158  case 1024: return 0x1;
159  case 2048: return 0x2;
160  case 4096: return 0x3;
161  case 8192: return 0x4;
162  case 16384: return 0x5;
163  }
164  return -1;
165 }
166 
167 static int spdif_header_dts4(AVFormatContext *s, AVPacket *pkt, int core_size,
168  int sample_rate, int blocks)
169 {
171  static const char dtshd_start_code[10] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe };
172  int pkt_size = pkt->size;
173  int period;
174  int subtype;
175 
176  if (!core_size) {
177  av_log(s, AV_LOG_ERROR, "HD mode not supported for this format\n");
178  return AVERROR(EINVAL);
179  }
180 
181  if (!sample_rate) {
182  av_log(s, AV_LOG_ERROR, "Unknown DTS sample rate for HD\n");
183  return AVERROR_INVALIDDATA;
184  }
185 
186  period = ctx->dtshd_rate * (blocks << 5) / sample_rate;
187  subtype = spdif_dts4_subtype(period);
188 
189  if (subtype < 0) {
190  av_log(s, AV_LOG_ERROR, "Specified HD rate of %d Hz would require an "
191  "impossible repetition period of %d for the current DTS stream"
192  " (blocks = %d, sample rate = %d)\n", ctx->dtshd_rate, period,
193  blocks << 5, sample_rate);
194  return AVERROR(EINVAL);
195  }
196 
197  /* set pkt_offset and DTS IV subtype according to the requested output
198  * rate */
199  ctx->pkt_offset = period * 4;
200  ctx->data_type = IEC61937_DTSHD | subtype << 8;
201 
202  /* If the bitrate is too high for transmitting at the selected
203  * repetition period setting, strip DTS-HD until a good amount
204  * of consecutive non-overflowing HD frames have been observed.
205  * This generally only happens if the caller is cramming a Master
206  * Audio stream into 192kHz IEC 60958 (which may or may not fit). */
207  if (sizeof(dtshd_start_code) + 2 + pkt_size
208  > ctx->pkt_offset - BURST_HEADER_SIZE && core_size) {
209  if (!ctx->dtshd_skip)
210  av_log(s, AV_LOG_WARNING, "DTS-HD bitrate too high, "
211  "temporarily sending core only\n");
212  if (ctx->dtshd_fallback > 0)
213  ctx->dtshd_skip = sample_rate * ctx->dtshd_fallback / (blocks << 5);
214  else
215  /* skip permanently (dtshd_fallback == -1) or just once
216  * (dtshd_fallback == 0) */
217  ctx->dtshd_skip = 1;
218  }
219  if (ctx->dtshd_skip && core_size) {
220  pkt_size = core_size;
221  if (ctx->dtshd_fallback >= 0)
222  --ctx->dtshd_skip;
223  }
224 
225  ctx->out_bytes = sizeof(dtshd_start_code) + 2 + pkt_size;
226 
227  /* Align so that (length_code & 0xf) == 0x8. This is reportedly needed
228  * with some receivers, but the exact requirement is unconfirmed. */
229  ctx->length_code = FFALIGN(ctx->out_bytes + 0x8, 0x10) - 0x8;
230 
231  av_fast_malloc(&ctx->hd_buf, &ctx->hd_buf_size, ctx->out_bytes);
232  if (!ctx->hd_buf)
233  return AVERROR(ENOMEM);
234 
235  ctx->out_buf = ctx->hd_buf;
236 
237  memcpy(ctx->hd_buf, dtshd_start_code, sizeof(dtshd_start_code));
238  AV_WB16(ctx->hd_buf + sizeof(dtshd_start_code), pkt_size);
239  memcpy(ctx->hd_buf + sizeof(dtshd_start_code) + 2, pkt->data, pkt_size);
240 
241  return 0;
242 }
243 
245 {
247  uint32_t syncword_dts = AV_RB32(pkt->data);
248  int blocks;
249  int sample_rate = 0;
250  int core_size = 0;
251 
252  if (pkt->size < 9)
253  return AVERROR_INVALIDDATA;
254 
255  switch (syncword_dts) {
257  blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
258  core_size = ((AV_RB24(pkt->data + 5) >> 4) & 0x3fff) + 1;
259  sample_rate = avpriv_dca_sample_rates[(pkt->data[8] >> 2) & 0x0f];
260  break;
262  blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
263  ctx->extra_bswap = 1;
264  break;
266  blocks =
267  (((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
268  break;
270  blocks =
271  (((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
272  ctx->extra_bswap = 1;
273  break;
275  /* We only handle HD frames that are paired with core. However,
276  sometimes DTS-HD streams with core have a stray HD frame without
277  core in the beginning of the stream. */
278  av_log(s, AV_LOG_ERROR, "stray DTS-HD frame\n");
279  return AVERROR_INVALIDDATA;
280  default:
281  av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%"PRIx32"\n", syncword_dts);
282  return AVERROR_INVALIDDATA;
283  }
284  blocks++;
285 
286  if (ctx->dtshd_rate)
287  /* DTS type IV output requested */
288  return spdif_header_dts4(s, pkt, core_size, sample_rate, blocks);
289 
290  switch (blocks) {
291  case 512 >> 5: ctx->data_type = IEC61937_DTS1; break;
292  case 1024 >> 5: ctx->data_type = IEC61937_DTS2; break;
293  case 2048 >> 5: ctx->data_type = IEC61937_DTS3; break;
294  default:
295  av_log(s, AV_LOG_ERROR, "%i samples in DTS frame not supported\n",
296  blocks << 5);
297  return AVERROR(ENOSYS);
298  }
299 
300  /* discard extraneous data by default */
301  if (core_size && core_size < pkt->size) {
302  ctx->out_bytes = core_size;
303  ctx->length_code = core_size << 3;
304  }
305 
306  ctx->pkt_offset = blocks << 7;
307 
308  if (ctx->out_bytes == ctx->pkt_offset) {
309  /* The DTS stream fits exactly into the output stream, so skip the
310  * preamble as it would not fit in there. This is the case for dts
311  * discs and dts-in-wav. */
312  ctx->use_preamble = 0;
313  } else if (ctx->out_bytes > ctx->pkt_offset - BURST_HEADER_SIZE) {
314  avpriv_request_sample(s, "Unrecognized large DTS frame");
315  /* This will fail with a "bitrate too high" in the caller */
316  }
317 
318  return 0;
319 }
320 
321 static const enum IEC61937DataType mpeg_data_type[2][3] = {
322  // LAYER1 LAYER2 LAYER3
324  { IEC61937_MPEG1_LAYER1, IEC61937_MPEG1_LAYER23, IEC61937_MPEG1_LAYER23 }, // MPEG-1
325 };
326 
328 {
330  int version = (pkt->data[1] >> 3) & 3;
331  int layer = 3 - ((pkt->data[1] >> 1) & 3);
332  int extension = pkt->data[2] & 1;
333 
334  if (layer == 3 || version == 1) {
335  av_log(s, AV_LOG_ERROR, "Wrong MPEG file format\n");
336  return AVERROR_INVALIDDATA;
337  }
338  av_log(s, AV_LOG_DEBUG, "version: %i layer: %i extension: %i\n", version, layer, extension);
339  if (version == 2 && extension) {
341  ctx->pkt_offset = 4608;
342  } else {
343  ctx->data_type = mpeg_data_type [version & 1][layer];
344  ctx->pkt_offset = spdif_mpeg_pkt_offset[version & 1][layer];
345  }
346  // TODO Data type dependent info (normal/karaoke, dynamic range control)
347  return 0;
348 }
349 
351 {
353  uint32_t samples;
354  uint8_t frames;
355  int ret;
356 
357  ret = av_adts_header_parse(pkt->data, &samples, &frames);
358  if (ret < 0) {
359  av_log(s, AV_LOG_ERROR, "Wrong AAC file format\n");
360  return ret;
361  }
362 
363  ctx->pkt_offset = samples << 2;
364  switch (frames) {
365  case 1:
367  break;
368  case 2:
370  break;
371  case 4:
373  break;
374  default:
375  av_log(s, AV_LOG_ERROR,
376  "%"PRIu32" samples in AAC frame not supported\n", samples);
377  return AVERROR(EINVAL);
378  }
379  //TODO Data type dependent info (LC profile/SBR)
380  return 0;
381 }
382 
383 
384 /*
385  * It seems Dolby TrueHD frames have to be encapsulated in MAT frames before
386  * they can be encapsulated in IEC 61937.
387  * Here we encapsulate 24 TrueHD frames in a single MAT frame, padding them
388  * to achieve constant rate.
389  * The actual format of a MAT frame is unknown, but the below seems to work.
390  * However, it seems it is not actually necessary for the 24 TrueHD frames to
391  * be in an exact alignment with the MAT frame.
392  */
393 #define MAT_FRAME_SIZE 61424
394 #define TRUEHD_FRAME_OFFSET 2560
395 #define MAT_MIDDLE_CODE_OFFSET -4
396 
398 {
400  int mat_code_length = 0;
401  static const char mat_end_code[16] = { 0xC3, 0xC2, 0xC0, 0xC4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x97, 0x11 };
402 
403  if (!ctx->hd_buf_count) {
404  static const char mat_start_code[20] = { 0x07, 0x9E, 0x00, 0x03, 0x84, 0x01, 0x01, 0x01, 0x80, 0x00, 0x56, 0xA5, 0x3B, 0xF4, 0x81, 0x83, 0x49, 0x80, 0x77, 0xE0 };
405  mat_code_length = sizeof(mat_start_code) + BURST_HEADER_SIZE;
406  memcpy(ctx->hd_buf, mat_start_code, sizeof(mat_start_code));
407 
408  } else if (ctx->hd_buf_count == 12) {
409  static const char mat_middle_code[12] = { 0xC3, 0xC1, 0x42, 0x49, 0x3B, 0xFA, 0x82, 0x83, 0x49, 0x80, 0x77, 0xE0 };
410  mat_code_length = sizeof(mat_middle_code) + MAT_MIDDLE_CODE_OFFSET;
412  mat_middle_code, sizeof(mat_middle_code));
413  }
414 
415  if (pkt->size > TRUEHD_FRAME_OFFSET - mat_code_length) {
416  /* if such frames exist, we'd need some more complex logic to
417  * distribute the TrueHD frames in the MAT frame */
418  avpriv_request_sample(s, "Too large TrueHD frame of %d bytes",
419  pkt->size);
420  return AVERROR_PATCHWELCOME;
421  }
422 
423  memcpy(&ctx->hd_buf[ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length],
424  pkt->data, pkt->size);
425  memset(&ctx->hd_buf[ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length + pkt->size],
426  0, TRUEHD_FRAME_OFFSET - pkt->size - mat_code_length);
427 
428  if (++ctx->hd_buf_count < 24){
429  ctx->pkt_offset = 0;
430  return 0;
431  }
432  memcpy(&ctx->hd_buf[MAT_FRAME_SIZE - sizeof(mat_end_code)], mat_end_code, sizeof(mat_end_code));
433  ctx->hd_buf_count = 0;
434 
435  ctx->data_type = IEC61937_TRUEHD;
436  ctx->pkt_offset = 61440;
437  ctx->out_buf = ctx->hd_buf;
438  ctx->out_bytes = MAT_FRAME_SIZE;
440  return 0;
441 }
442 
444 {
446 
447  switch (s->streams[0]->codecpar->codec_id) {
448  case AV_CODEC_ID_AC3:
450  break;
451  case AV_CODEC_ID_EAC3:
453  break;
454  case AV_CODEC_ID_MP1:
455  case AV_CODEC_ID_MP2:
456  case AV_CODEC_ID_MP3:
458  break;
459  case AV_CODEC_ID_DTS:
461  break;
462  case AV_CODEC_ID_AAC:
464  break;
465  case AV_CODEC_ID_TRUEHD:
466  case AV_CODEC_ID_MLP:
469  if (!ctx->hd_buf)
470  return AVERROR(ENOMEM);
471  break;
472  default:
473  avpriv_report_missing_feature(s, "Codec %d",
474  s->streams[0]->codecpar->codec_id);
475  return AVERROR_PATCHWELCOME;
476  }
477  return 0;
478 }
479 
481 {
483  av_freep(&ctx->buffer);
484  av_freep(&ctx->hd_buf);
485  return 0;
486 }
487 
489  AVIOContext *pb, unsigned int val)
490 {
492  avio_wb16(pb, val);
493  else
494  avio_wl16(pb, val);
495 }
496 
498 {
500  int ret, padding;
501 
502  ctx->out_buf = pkt->data;
503  ctx->out_bytes = pkt->size;
504  ctx->length_code = FFALIGN(pkt->size, 2) << 3;
505  ctx->use_preamble = 1;
506  ctx->extra_bswap = 0;
507 
508  ret = ctx->header_info(s, pkt);
509  if (ret < 0)
510  return ret;
511  if (!ctx->pkt_offset)
512  return 0;
513 
514  padding = (ctx->pkt_offset - ctx->use_preamble * BURST_HEADER_SIZE - ctx->out_bytes) & ~1;
515  if (padding < 0) {
516  av_log(s, AV_LOG_ERROR, "bitrate is too high\n");
517  return AVERROR(EINVAL);
518  }
519 
520  if (ctx->use_preamble) {
521  spdif_put_16(ctx, s->pb, SYNCWORD1); //Pa
522  spdif_put_16(ctx, s->pb, SYNCWORD2); //Pb
523  spdif_put_16(ctx, s->pb, ctx->data_type); //Pc
524  spdif_put_16(ctx, s->pb, ctx->length_code);//Pd
525  }
526 
527  if (ctx->extra_bswap ^ (ctx->spdif_flags & SPDIF_FLAG_BIGENDIAN)) {
528  avio_write(s->pb, ctx->out_buf, ctx->out_bytes & ~1);
529  } else {
531  if (!ctx->buffer)
532  return AVERROR(ENOMEM);
533  ff_spdif_bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)ctx->out_buf, ctx->out_bytes >> 1);
534  avio_write(s->pb, ctx->buffer, ctx->out_bytes & ~1);
535  }
536 
537  /* a final lone byte has to be MSB aligned */
538  if (ctx->out_bytes & 1)
539  spdif_put_16(ctx, s->pb, ctx->out_buf[ctx->out_bytes - 1] << 8);
540 
541  ffio_fill(s->pb, 0, padding);
542 
543  av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
544  ctx->data_type, ctx->out_bytes, ctx->pkt_offset);
545 
546  return 0;
547 }
548 
550  .name = "spdif",
551  .long_name = NULL_IF_CONFIG_SMALL("IEC 61937 (used on S/PDIF - IEC958)"),
552  .extensions = "spdif",
553  .priv_data_size = sizeof(IEC61937Context),
554  .audio_codec = AV_CODEC_ID_AC3,
555  .video_codec = AV_CODEC_ID_NONE,
560  .priv_class = &spdif_class,
561 };
MPEG-2 AAC ADTS half-rate low sampling frequency.
Definition: spdif.h:49
uint8_t * out_buf
pointer to the outgoing data before byte-swapping
Definition: spdifenc.c:66
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:469
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVOption.
Definition: opt.h:246
int pkt_offset
data burst repetition period in bytes
Definition: spdifenc.c:62
static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:327
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define BURST_HEADER_SIZE
Definition: spdif.h:30
MPEG-2, layer-1 low sampling frequency.
Definition: spdif.h:38
static int spdif_dts4_subtype(int period)
Definition: spdifenc.c:154
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
int size
Definition: avcodec.h:1431
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
IEC61937DataType
Definition: spdif.h:32
static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:497
int version
Definition: avisynth_c.h:766
static AVPacket pkt
static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:244
void ff_spdif_bswap_buf16(uint16_t *dst, const uint16_t *src, int w)
Definition: spdif.c:26
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_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
static int spdif_header_eac3(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:115
int buffer_size
size of allocated buffer
Definition: spdifenc.c:64
Format I/O context.
Definition: avformat.h:1351
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
int av_adts_header_parse(const uint8_t *buf, uint32_t *samples, uint8_t *frames)
Extract the number of samples and frames from AAC data.
Definition: adts_parser.c:27
static const AVClass spdif_class
Definition: spdifenc.c:98
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
MPEG-2 AAC ADTS.
Definition: spdif.h:37
uint8_t
#define av_malloc(s)
AVOptions.
#define DCA_SYNCWORD_CORE_14B_BE
Definition: dca_syncwords.h:24
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:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
AVOutputFormat ff_spdif_muxer
Definition: spdifenc.c:549
uint8_t * data
Definition: avcodec.h:1430
#define MAT_MIDDLE_CODE_OFFSET
Definition: spdifenc.c:395
#define SPDIF_FLAG_BIGENDIAN
Definition: spdifenc.c:82
DTS type II (1024 samples)
Definition: spdif.h:42
ptrdiff_t size
Definition: opengl_enc.c:101
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
static int spdif_write_trailer(AVFormatContext *s)
Definition: spdifenc.c:480
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
#define FFALIGN(x, a)
Definition: macros.h:48
TrueHD data.
Definition: spdif.h:52
#define av_log(a,...)
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
#define DCA_SYNCWORD_CORE_BE
Definition: dca_syncwords.h:22
DTS HD data.
Definition: spdif.h:47
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
DTS type III (2048 samples)
Definition: spdif.h:43
const AVClass * av_class
Definition: spdifenc.c:59
#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:186
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:552
MPEG-1 layer 2 or 3 data or MPEG-2 without extension.
Definition: spdif.h:35
MPEG-2, layer-3 low sampling frequency.
Definition: spdif.h:40
int hd_buf_count
number of frames in the hd audio buffer
Definition: spdifenc.c:74
#define DCA_SYNCWORD_CORE_14B_LE
Definition: dca_syncwords.h:25
MPEG-1 layer 1.
Definition: spdif.h:34
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:488
void ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:204
uint8_t * buffer
allocated buffer, used for swap bytes
Definition: spdifenc.c:63
int out_bytes
amount of outgoing bytes
Definition: spdifenc.c:67
int(* header_info)(AVFormatContext *s, AVPacket *pkt)
function, which generates codec dependent header information.
Definition: spdifenc.c:87
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
const char * name
Definition: avformat.h:507
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define TRUEHD_FRAME_OFFSET
Definition: spdifenc.c:394
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:464
int dtshd_fallback
Definition: spdifenc.c:81
int frames
Definition: movenc.c:65
const uint32_t avpriv_dca_sample_rates[16]
Definition: dca.c:36
static av_always_inline void spdif_put_16(IEC61937Context *ctx, AVIOContext *pb, unsigned int val)
Definition: spdifenc.c:488
enum IEC61937DataType data_type
burst info - reference to type of payload of the data-burst
Definition: spdifenc.c:60
static enum IEC61937DataType mpeg_data_type[2][3]
Definition: spdifenc.c:321
#define SYNCWORD2
Definition: spdif.h:29
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:469
static const AVOption options[]
Definition: spdifenc.c:90
sample_rate
#define MAT_FRAME_SIZE
Definition: spdifenc.c:393
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_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
static int spdif_write_header(AVFormatContext *s)
Definition: spdifenc.c:443
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int use_preamble
preamble enabled (disabled for exactly pre-padded DTS)
Definition: spdifenc.c:69
#define DCA_SYNCWORD_CORE_LE
Definition: dca_syncwords.h:23
int hd_buf_filled
amount of bytes in the hd audio buffer
Definition: spdifenc.c:75
Describe the class of an AVClass context structure.
Definition: log.h:67
int length_code
length code in bits or bytes, depending on data type
Definition: spdifenc.c:61
static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:397
DTS type I (512 samples)
Definition: spdif.h:41
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:475
MPEG-2, layer-2 low sampling frequency.
Definition: spdif.h:39
static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:350
E-AC-3 data.
Definition: spdif.h:51
#define AC3_FRAME_SIZE
Definition: ac3.h:38
Main libavformat public API header.
int
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:773
MPEG-2 data with extension.
Definition: spdif.h:36
int dtshd_skip
counter used for skipping DTS-HD frames
Definition: spdifenc.c:77
int hd_buf_size
size of the hd audio buffer
Definition: spdifenc.c:73
MPEG-2 AAC ADTS quarter-rate low sampling frequency.
Definition: spdif.h:50
static const uint16_t spdif_mpeg_pkt_offset[2][3]
Definition: spdif.h:55
#define SYNCWORD1
Definition: spdif.h:28
void * priv_data
Format private data.
Definition: avformat.h:1379
#define DCA_SYNCWORD_SUBSTREAM
Definition: dca_syncwords.h:32
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:105
AC-3 data.
Definition: spdif.h:33
static int spdif_header_dts4(AVFormatContext *s, AVPacket *pkt, int core_size, int sample_rate, int blocks)
Definition: spdifenc.c:167
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:39
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
int extra_bswap
extra bswap for payload (for LE DTS => standard BE DTS)
Definition: spdifenc.c:70
This structure stores compressed data.
Definition: avcodec.h:1407
uint8_t * hd_buf
allocated buffer to concatenate hd audio frames
Definition: spdifenc.c:72
Common code between the AC-3 encoder and decoder.