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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/dca.h"
55 #include "libavcodec/aacadtsdec.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  if ((pkt->data[4] & 0xc0) != 0xc0) /* fscod */
122  repeat = eac3_repeat[(pkt->data[4] & 0x30) >> 4]; /* numblkscod */
123 
124  ctx->hd_buf = av_fast_realloc(ctx->hd_buf, &ctx->hd_buf_size, ctx->hd_buf_filled + pkt->size);
125  if (!ctx->hd_buf)
126  return AVERROR(ENOMEM);
127 
128  memcpy(&ctx->hd_buf[ctx->hd_buf_filled], pkt->data, pkt->size);
129 
130  ctx->hd_buf_filled += pkt->size;
131  if (++ctx->hd_buf_count < repeat){
132  ctx->pkt_offset = 0;
133  return 0;
134  }
135  ctx->data_type = IEC61937_EAC3;
136  ctx->pkt_offset = 24576;
137  ctx->out_buf = ctx->hd_buf;
138  ctx->out_bytes = ctx->hd_buf_filled;
139  ctx->length_code = ctx->hd_buf_filled;
140 
141  ctx->hd_buf_count = 0;
142  ctx->hd_buf_filled = 0;
143  return 0;
144 }
145 
146 /*
147  * DTS type IV (DTS-HD) can be transmitted with various frame repetition
148  * periods; longer repetition periods allow for longer packets and therefore
149  * higher bitrate. Longer repetition periods mean that the constant bitrate of
150  * the output IEC 61937 stream is higher.
151  * The repetition period is measured in IEC 60958 frames (4 bytes).
152  */
153 static int spdif_dts4_subtype(int period)
154 {
155  switch (period) {
156  case 512: return 0x0;
157  case 1024: return 0x1;
158  case 2048: return 0x2;
159  case 4096: return 0x3;
160  case 8192: return 0x4;
161  case 16384: return 0x5;
162  }
163  return -1;
164 }
165 
166 static int spdif_header_dts4(AVFormatContext *s, AVPacket *pkt, int core_size,
167  int sample_rate, int blocks)
168 {
170  static const char dtshd_start_code[10] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe };
171  int pkt_size = pkt->size;
172  int period;
173  int subtype;
174 
175  if (!core_size) {
176  av_log(s, AV_LOG_ERROR, "HD mode not supported for this format\n");
177  return AVERROR(EINVAL);
178  }
179 
180  if (!sample_rate) {
181  av_log(s, AV_LOG_ERROR, "Unknown DTS sample rate for HD\n");
182  return AVERROR_INVALIDDATA;
183  }
184 
185  period = ctx->dtshd_rate * (blocks << 5) / sample_rate;
186  subtype = spdif_dts4_subtype(period);
187 
188  if (subtype < 0) {
189  av_log(s, AV_LOG_ERROR, "Specified HD rate of %d Hz would require an "
190  "impossible repetition period of %d for the current DTS stream"
191  " (blocks = %d, sample rate = %d)\n", ctx->dtshd_rate, period,
192  blocks << 5, sample_rate);
193  return AVERROR(EINVAL);
194  }
195 
196  /* set pkt_offset and DTS IV subtype according to the requested output
197  * rate */
198  ctx->pkt_offset = period * 4;
199  ctx->data_type = IEC61937_DTSHD | subtype << 8;
200 
201  /* If the bitrate is too high for transmitting at the selected
202  * repetition period setting, strip DTS-HD until a good amount
203  * of consecutive non-overflowing HD frames have been observed.
204  * This generally only happens if the caller is cramming a Master
205  * Audio stream into 192kHz IEC 60958 (which may or may not fit). */
206  if (sizeof(dtshd_start_code) + 2 + pkt_size
207  > ctx->pkt_offset - BURST_HEADER_SIZE && core_size) {
208  if (!ctx->dtshd_skip)
209  av_log(s, AV_LOG_WARNING, "DTS-HD bitrate too high, "
210  "temporarily sending core only\n");
211  if (ctx->dtshd_fallback > 0)
212  ctx->dtshd_skip = sample_rate * ctx->dtshd_fallback / (blocks << 5);
213  else
214  /* skip permanently (dtshd_fallback == -1) or just once
215  * (dtshd_fallback == 0) */
216  ctx->dtshd_skip = 1;
217  }
218  if (ctx->dtshd_skip && core_size) {
219  pkt_size = core_size;
220  if (ctx->dtshd_fallback >= 0)
221  --ctx->dtshd_skip;
222  }
223 
224  ctx->out_bytes = sizeof(dtshd_start_code) + 2 + pkt_size;
225 
226  /* Align so that (length_code & 0xf) == 0x8. This is reportedly needed
227  * with some receivers, but the exact requirement is unconfirmed. */
228  ctx->length_code = FFALIGN(ctx->out_bytes + 0x8, 0x10) - 0x8;
229 
230  av_fast_malloc(&ctx->hd_buf, &ctx->hd_buf_size, ctx->out_bytes);
231  if (!ctx->hd_buf)
232  return AVERROR(ENOMEM);
233 
234  ctx->out_buf = ctx->hd_buf;
235 
236  memcpy(ctx->hd_buf, dtshd_start_code, sizeof(dtshd_start_code));
237  AV_WB16(ctx->hd_buf + sizeof(dtshd_start_code), pkt_size);
238  memcpy(ctx->hd_buf + sizeof(dtshd_start_code) + 2, pkt->data, pkt_size);
239 
240  return 0;
241 }
242 
244 {
246  uint32_t syncword_dts = AV_RB32(pkt->data);
247  int blocks;
248  int sample_rate = 0;
249  int core_size = 0;
250 
251  if (pkt->size < 9)
252  return AVERROR_INVALIDDATA;
253 
254  switch (syncword_dts) {
256  blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
257  core_size = ((AV_RB24(pkt->data + 5) >> 4) & 0x3fff) + 1;
258  sample_rate = avpriv_dca_sample_rates[(pkt->data[8] >> 2) & 0x0f];
259  break;
261  blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
262  ctx->extra_bswap = 1;
263  break;
265  blocks =
266  (((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
267  break;
269  blocks =
270  (((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
271  ctx->extra_bswap = 1;
272  break;
274  /* We only handle HD frames that are paired with core. However,
275  sometimes DTS-HD streams with core have a stray HD frame without
276  core in the beginning of the stream. */
277  av_log(s, AV_LOG_ERROR, "stray DTS-HD frame\n");
278  return AVERROR_INVALIDDATA;
279  default:
280  av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%"PRIx32"\n", syncword_dts);
281  return AVERROR_INVALIDDATA;
282  }
283  blocks++;
284 
285  if (ctx->dtshd_rate)
286  /* DTS type IV output requested */
287  return spdif_header_dts4(s, pkt, core_size, sample_rate, blocks);
288 
289  switch (blocks) {
290  case 512 >> 5: ctx->data_type = IEC61937_DTS1; break;
291  case 1024 >> 5: ctx->data_type = IEC61937_DTS2; break;
292  case 2048 >> 5: ctx->data_type = IEC61937_DTS3; break;
293  default:
294  av_log(s, AV_LOG_ERROR, "%i samples in DTS frame not supported\n",
295  blocks << 5);
296  return AVERROR(ENOSYS);
297  }
298 
299  /* discard extraneous data by default */
300  if (core_size && core_size < pkt->size) {
301  ctx->out_bytes = core_size;
302  ctx->length_code = core_size << 3;
303  }
304 
305  ctx->pkt_offset = blocks << 7;
306 
307  if (ctx->out_bytes == ctx->pkt_offset) {
308  /* The DTS stream fits exactly into the output stream, so skip the
309  * preamble as it would not fit in there. This is the case for dts
310  * discs and dts-in-wav. */
311  ctx->use_preamble = 0;
312  } else if (ctx->out_bytes > ctx->pkt_offset - BURST_HEADER_SIZE) {
313  avpriv_request_sample(s, "Unrecognized large DTS frame");
314  /* This will fail with a "bitrate too high" in the caller */
315  }
316 
317  return 0;
318 }
319 
320 static const enum IEC61937DataType mpeg_data_type[2][3] = {
321  // LAYER1 LAYER2 LAYER3
323  { IEC61937_MPEG1_LAYER1, IEC61937_MPEG1_LAYER23, IEC61937_MPEG1_LAYER23 }, // MPEG-1
324 };
325 
327 {
329  int version = (pkt->data[1] >> 3) & 3;
330  int layer = 3 - ((pkt->data[1] >> 1) & 3);
331  int extension = pkt->data[2] & 1;
332 
333  if (layer == 3 || version == 1) {
334  av_log(s, AV_LOG_ERROR, "Wrong MPEG file format\n");
335  return AVERROR_INVALIDDATA;
336  }
337  av_log(s, AV_LOG_DEBUG, "version: %i layer: %i extension: %i\n", version, layer, extension);
338  if (version == 2 && extension) {
340  ctx->pkt_offset = 4608;
341  } else {
342  ctx->data_type = mpeg_data_type [version & 1][layer];
343  ctx->pkt_offset = spdif_mpeg_pkt_offset[version & 1][layer];
344  }
345  // TODO Data type dependent info (normal/karaoke, dynamic range control)
346  return 0;
347 }
348 
350 {
352  AACADTSHeaderInfo hdr;
353  GetBitContext gbc;
354  int ret;
355 
356  init_get_bits(&gbc, pkt->data, AAC_ADTS_HEADER_SIZE * 8);
357  ret = avpriv_aac_parse_header(&gbc, &hdr);
358  if (ret < 0) {
359  av_log(s, AV_LOG_ERROR, "Wrong AAC file format\n");
360  return AVERROR_INVALIDDATA;
361  }
362 
363  ctx->pkt_offset = hdr.samples << 2;
364  switch (hdr.num_aac_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", hdr.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  av_log(s, AV_LOG_ERROR, "codec not supported\n");
474  return AVERROR_PATCHWELCOME;
475  }
476  return 0;
477 }
478 
480 {
482  av_freep(&ctx->buffer);
483  av_freep(&ctx->hd_buf);
484  return 0;
485 }
486 
488  AVIOContext *pb, unsigned int val)
489 {
491  avio_wb16(pb, val);
492  else
493  avio_wl16(pb, val);
494 }
495 
497 {
499  int ret, padding;
500 
501  ctx->out_buf = pkt->data;
502  ctx->out_bytes = pkt->size;
503  ctx->length_code = FFALIGN(pkt->size, 2) << 3;
504  ctx->use_preamble = 1;
505  ctx->extra_bswap = 0;
506 
507  ret = ctx->header_info(s, pkt);
508  if (ret < 0)
509  return ret;
510  if (!ctx->pkt_offset)
511  return 0;
512 
513  padding = (ctx->pkt_offset - ctx->use_preamble * BURST_HEADER_SIZE - ctx->out_bytes) & ~1;
514  if (padding < 0) {
515  av_log(s, AV_LOG_ERROR, "bitrate is too high\n");
516  return AVERROR(EINVAL);
517  }
518 
519  if (ctx->use_preamble) {
520  spdif_put_16(ctx, s->pb, SYNCWORD1); //Pa
521  spdif_put_16(ctx, s->pb, SYNCWORD2); //Pb
522  spdif_put_16(ctx, s->pb, ctx->data_type); //Pc
523  spdif_put_16(ctx, s->pb, ctx->length_code);//Pd
524  }
525 
526  if (ctx->extra_bswap ^ (ctx->spdif_flags & SPDIF_FLAG_BIGENDIAN)) {
527  avio_write(s->pb, ctx->out_buf, ctx->out_bytes & ~1);
528  } else {
530  if (!ctx->buffer)
531  return AVERROR(ENOMEM);
532  ff_spdif_bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)ctx->out_buf, ctx->out_bytes >> 1);
533  avio_write(s->pb, ctx->buffer, ctx->out_bytes & ~1);
534  }
535 
536  /* a final lone byte has to be MSB aligned */
537  if (ctx->out_bytes & 1)
538  spdif_put_16(ctx, s->pb, ctx->out_buf[ctx->out_bytes - 1] << 8);
539 
540  ffio_fill(s->pb, 0, padding);
541 
542  av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
543  ctx->data_type, ctx->out_bytes, ctx->pkt_offset);
544 
545  return 0;
546 }
547 
549  .name = "spdif",
550  .long_name = NULL_IF_CONFIG_SMALL("IEC 61937 (used on S/PDIF - IEC958)"),
551  .extensions = "spdif",
552  .priv_data_size = sizeof(IEC61937Context),
553  .audio_codec = AV_CODEC_ID_AC3,
554  .video_codec = AV_CODEC_ID_NONE,
559  .priv_class = &spdif_class,
560 };
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
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:634
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:446
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVOption.
Definition: opt.h:245
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:326
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
#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:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3939
int size
Definition: avcodec.h:1589
IEC61937DataType
Definition: spdif.h:32
static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:496
int version
Definition: avisynth_c.h:629
static AVPacket pkt
static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:243
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:1325
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
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:1393
AVOutputFormat ff_spdif_muxer
Definition: spdifenc.c:548
uint8_t * data
Definition: avcodec.h:1588
#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
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
static int spdif_write_trailer(AVFormatContext *s)
Definition: spdifenc.c:479
#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:275
#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
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
Definition: mem.c:480
DTS type III (2048 samples)
Definition: spdif.h:43
const AVClass * av_class
Definition: spdifenc.c:59
av_default_item_name
#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:176
#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:515
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 ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:190
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
uint8_t num_aac_frames
Definition: aacadtsdec.h:39
const char * name
Definition: avformat.h:522
AVFormatContext * ctx
Definition: movenc.c:48
#define TRUEHD_FRAME_OFFSET
Definition: spdifenc.c:394
int dtshd_fallback
Definition: spdifenc.c:81
uint32_t samples
Definition: aacadtsdec.h:33
const uint32_t avpriv_dca_sample_rates[16]
Definition: dca.c:34
static av_always_inline void spdif_put_16(IEC61937Context *ctx, AVIOContext *pb, unsigned int val)
Definition: spdifenc.c:487
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:320
#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:484
static const AVOption options[]
Definition: spdifenc.c:90
#define AAC_ADTS_HEADER_SIZE
Definition: aacadtsdec.h:29
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:1367
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 avpriv_aac_parse_header(GetBitContext *gbc, AACADTSHeaderInfo *hdr)
Parse AAC frame header.
Definition: aacadtsdec.c:29
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 init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:406
static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:397
DTS type I (512 samples)
Definition: spdif.h:41
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:452
static int flags
Definition: cpu.c:47
MPEG-2, layer-2 low sampling frequency.
Definition: spdif.h:39
static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
Definition: spdifenc.c:349
E-AC-3 data.
Definition: spdif.h:51
#define AC3_FRAME_SIZE
Definition: ac3.h:37
Main libavformat public API header.
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:499
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:731
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:1353
#define DCA_SYNCWORD_SUBSTREAM
Definition: dca_syncwords.h:32
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:498
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:166
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:39
AVCodecParameters * codecpar
Definition: avformat.h:1228
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:1565
uint8_t * hd_buf
allocated buffer to concatenate hd audio frames
Definition: spdifenc.c:72
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
Common code between the AC-3 encoder and decoder.