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decklink_dec.cpp
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1 /*
2  * Blackmagic DeckLink input
3  * Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl
4  * Copyright (c) 2014 Rafaël Carré
5  * Copyright (c) 2017 Akamai Technologies, Inc.
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 /* Include internal.h first to avoid conflict between winsock.h (used by
25  * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
26 extern "C" {
27 #include "libavformat/internal.h"
28 }
29 
30 #include <DeckLinkAPI.h>
31 
32 extern "C" {
33 #include "config.h"
34 #include "libavformat/avformat.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/avutil.h"
37 #include "libavutil/common.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/time.h"
40 #include "libavutil/mathematics.h"
41 #include "libavutil/reverse.h"
42 #include "avdevice.h"
43 #if CONFIG_LIBZVBI
44 #include <libzvbi.h>
45 #endif
46 }
47 
48 #include "decklink_common.h"
49 #include "decklink_dec.h"
50 
51 #define MAX_WIDTH_VANC 1920
52 
53 typedef struct VANCLineNumber {
54  BMDDisplayMode mode;
58  int vanc_end;
60 
61 /* These VANC line numbers need not be very accurate. In any case
62  * GetBufferForVerticalBlankingLine() will return an error when invalid
63  * ancillary line number was requested. We just need to make sure that the
64  * entire VANC region is covered, while making sure we don't decode VANC of
65  * another source during switching*/
67  /* SD Modes */
68 
69  {bmdModeNTSC, 11, 19, 274, 282},
70  {bmdModeNTSC2398, 11, 19, 274, 282},
71  {bmdModePAL, 7, 22, 320, 335},
72  {bmdModeNTSCp, 11, -1, -1, 39},
73  {bmdModePALp, 7, -1, -1, 45},
74 
75  /* HD 1080 Modes */
76 
77  {bmdModeHD1080p2398, 8, -1, -1, 42},
78  {bmdModeHD1080p24, 8, -1, -1, 42},
79  {bmdModeHD1080p25, 8, -1, -1, 42},
80  {bmdModeHD1080p2997, 8, -1, -1, 42},
81  {bmdModeHD1080p30, 8, -1, -1, 42},
82  {bmdModeHD1080i50, 8, 20, 570, 585},
83  {bmdModeHD1080i5994, 8, 20, 570, 585},
84  {bmdModeHD1080i6000, 8, 20, 570, 585},
85  {bmdModeHD1080p50, 8, -1, -1, 42},
86  {bmdModeHD1080p5994, 8, -1, -1, 42},
87  {bmdModeHD1080p6000, 8, -1, -1, 42},
88 
89  /* HD 720 Modes */
90 
91  {bmdModeHD720p50, 8, -1, -1, 26},
92  {bmdModeHD720p5994, 8, -1, -1, 26},
93  {bmdModeHD720p60, 8, -1, -1, 26},
94 
95  /* For all other modes, for which we don't support VANC */
96  {bmdModeUnknown, 0, -1, -1, -1}
97 };
98 
99 static int get_vanc_line_idx(BMDDisplayMode mode)
100 {
101  unsigned int i;
102  for (i = 0; i < FF_ARRAY_ELEMS(vanc_line_numbers); i++) {
103  if (mode == vanc_line_numbers[i].mode)
104  return i;
105  }
106  /* Return the VANC idx for Unknown mode */
107  return i - 1;
108 }
109 
110 static inline void clear_parity_bits(uint16_t *buf, int len) {
111  int i;
112  for (i = 0; i < len; i++)
113  buf[i] &= 0xff;
114 }
115 
116 static int check_vanc_parity_checksum(uint16_t *buf, int len, uint16_t checksum) {
117  int i;
118  uint16_t vanc_sum = 0;
119  for (i = 3; i < len - 1; i++) {
120  uint16_t v = buf[i];
121  int np = v >> 8;
122  int p = av_parity(v & 0xff);
123  if ((!!p ^ !!(v & 0x100)) || (np != 1 && np != 2)) {
124  // Parity check failed
125  return -1;
126  }
127  vanc_sum += v;
128  }
129  vanc_sum &= 0x1ff;
130  vanc_sum |= ((~vanc_sum & 0x100) << 1);
131  if (checksum != vanc_sum) {
132  // Checksum verification failed
133  return -1;
134  }
135  return 0;
136 }
137 
138 /* The 10-bit VANC data is packed in V210, we only need the luma component. */
139 static void extract_luma_from_v210(uint16_t *dst, const uint8_t *src, int width)
140 {
141  int i;
142  for (i = 0; i < width / 3; i++) {
143  *dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
144  *dst++ = src[4] + ((src[5] & 3) << 8);
145  *dst++ = (src[6] >> 4) + ((src[7] & 63) << 4);
146  src += 8;
147  }
148 }
149 
151 {
152  uint8_t ret = (line < 313) << 5;
153  if (line >= 7 && line <= 22)
154  ret += line;
155  if (line >= 320 && line <= 335)
156  ret += (line - 313);
157  return ret;
158 }
159 
160 static void fill_data_unit_head(int line, uint8_t *tgt)
161 {
162  tgt[0] = 0x02; // data_unit_id
163  tgt[1] = 0x2c; // data_unit_length
164  tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset
165  tgt[3] = 0xe4; // framing code
166 }
167 
168 #if CONFIG_LIBZVBI
169 static uint8_t* teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt, vbi_pixfmt fmt)
170 {
171  vbi_bit_slicer slicer;
172 
173  vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, fmt);
174 
175  if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE)
176  return tgt;
177 
178  fill_data_unit_head(line, tgt);
179 
180  return tgt + 46;
181 }
182 
183 static uint8_t* teletext_data_unit_from_vbi_data_10bit(int line, uint8_t *src, uint8_t *tgt)
184 {
185  uint8_t y[720];
186  uint8_t *py = y;
187  uint8_t *pend = y + 720;
188  /* The 10-bit VBI data is packed in V210, but libzvbi only supports 8-bit,
189  * so we extract the 8 MSBs of the luma component, that is enough for
190  * teletext bit slicing. */
191  while (py < pend) {
192  *py++ = (src[1] >> 4) + ((src[2] & 15) << 4);
193  *py++ = (src[4] >> 2) + ((src[5] & 3 ) << 6);
194  *py++ = (src[6] >> 6) + ((src[7] & 63) << 2);
195  src += 8;
196  }
197  return teletext_data_unit_from_vbi_data(line, y, tgt, VBI_PIXFMT_YUV420);
198 }
199 #endif
200 
201 static uint8_t* teletext_data_unit_from_op47_vbi_packet(int line, uint16_t *py, uint8_t *tgt)
202 {
203  int i;
204 
205  if (py[0] != 0x255 || py[1] != 0x255 || py[2] != 0x227)
206  return tgt;
207 
208  fill_data_unit_head(line, tgt);
209 
210  py += 3;
211  tgt += 4;
212 
213  for (i = 0; i < 42; i++)
214  *tgt++ = ff_reverse[py[i] & 255];
215 
216  return tgt;
217 }
218 
219 static int linemask_matches(int line, int64_t mask)
220 {
221  int shift = -1;
222  if (line >= 6 && line <= 22)
223  shift = line - 6;
224  if (line >= 318 && line <= 335)
225  shift = line - 318 + 17;
226  return shift >= 0 && ((1ULL << shift) & mask);
227 }
228 
229 static uint8_t* teletext_data_unit_from_op47_data(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines)
230 {
231  if (py < pend - 9) {
232  if (py[0] == 0x151 && py[1] == 0x115 && py[3] == 0x102) { // identifier, identifier, format code for WST teletext
233  uint16_t *descriptors = py + 4;
234  int i;
235  py += 9;
236  for (i = 0; i < 5 && py < pend - 45; i++, py += 45) {
237  int line = (descriptors[i] & 31) + (!(descriptors[i] & 128)) * 313;
238  if (line && linemask_matches(line, wanted_lines))
239  tgt = teletext_data_unit_from_op47_vbi_packet(line, py, tgt);
240  }
241  }
242  }
243  return tgt;
244 }
245 
246 static uint8_t* teletext_data_unit_from_ancillary_packet(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines, int allow_multipacket)
247 {
248  uint16_t did = py[0]; // data id
249  uint16_t sdid = py[1]; // secondary data id
250  uint16_t dc = py[2] & 255; // data count
251  py += 3;
252  pend = FFMIN(pend, py + dc);
253  if (did == 0x143 && sdid == 0x102) { // subtitle distribution packet
254  tgt = teletext_data_unit_from_op47_data(py, pend, tgt, wanted_lines);
255  } else if (allow_multipacket && did == 0x143 && sdid == 0x203) { // VANC multipacket
256  py += 2; // priority, line/field
257  while (py < pend - 3) {
258  tgt = teletext_data_unit_from_ancillary_packet(py, pend, tgt, wanted_lines, 0);
259  py += 4 + (py[2] & 255); // ndid, nsdid, ndc, line/field
260  }
261  }
262  return tgt;
263 }
264 
265 uint8_t *vanc_to_cc(AVFormatContext *avctx, uint16_t *buf, size_t words,
266  unsigned &cc_count)
267 {
268  size_t i, len = (buf[5] & 0xff) + 6 + 1;
269  uint8_t cdp_sum, rate;
270  uint16_t hdr, ftr;
271  uint8_t *cc;
272  uint16_t *cdp = &buf[6]; // CDP follows
273  if (cdp[0] != 0x96 || cdp[1] != 0x69) {
274  av_log(avctx, AV_LOG_WARNING, "Invalid CDP header 0x%.2x 0x%.2x\n", cdp[0], cdp[1]);
275  return NULL;
276  }
277 
278  len -= 7; // remove VANC header and checksum
279 
280  if (cdp[2] != len) {
281  av_log(avctx, AV_LOG_WARNING, "CDP len %d != %zu\n", cdp[2], len);
282  return NULL;
283  }
284 
285  cdp_sum = 0;
286  for (i = 0; i < len - 1; i++)
287  cdp_sum += cdp[i];
288  cdp_sum = cdp_sum ? 256 - cdp_sum : 0;
289  if (cdp[len - 1] != cdp_sum) {
290  av_log(avctx, AV_LOG_WARNING, "CDP checksum invalid 0x%.4x != 0x%.4x\n", cdp_sum, cdp[len-1]);
291  return NULL;
292  }
293 
294  rate = cdp[3];
295  if (!(rate & 0x0f)) {
296  av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
297  return NULL;
298  }
299  rate >>= 4;
300  if (rate > 8) {
301  av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
302  return NULL;
303  }
304 
305  if (!(cdp[4] & 0x43)) /* ccdata_present | caption_service_active | reserved */ {
306  av_log(avctx, AV_LOG_WARNING, "CDP flags invalid (0x%.2x)\n", cdp[4]);
307  return NULL;
308  }
309 
310  hdr = (cdp[5] << 8) | cdp[6];
311  if (cdp[7] != 0x72) /* ccdata_id */ {
312  av_log(avctx, AV_LOG_WARNING, "Invalid ccdata_id 0x%.2x\n", cdp[7]);
313  return NULL;
314  }
315 
316  cc_count = cdp[8];
317  if (!(cc_count & 0xe0)) {
318  av_log(avctx, AV_LOG_WARNING, "Invalid cc_count 0x%.2x\n", cc_count);
319  return NULL;
320  }
321 
322  cc_count &= 0x1f;
323  if ((len - 13) < cc_count * 3) {
324  av_log(avctx, AV_LOG_WARNING, "Invalid cc_count %d (> %zu)\n", cc_count * 3, len - 13);
325  return NULL;
326  }
327 
328  if (cdp[len - 4] != 0x74) /* footer id */ {
329  av_log(avctx, AV_LOG_WARNING, "Invalid footer id 0x%.2x\n", cdp[len-4]);
330  return NULL;
331  }
332 
333  ftr = (cdp[len - 3] << 8) | cdp[len - 2];
334  if (ftr != hdr) {
335  av_log(avctx, AV_LOG_WARNING, "Header 0x%.4x != Footer 0x%.4x\n", hdr, ftr);
336  return NULL;
337  }
338 
339  cc = (uint8_t *)av_malloc(cc_count * 3);
340  if (cc == NULL) {
341  av_log(avctx, AV_LOG_WARNING, "CC - av_malloc failed for cc_count = %d\n", cc_count);
342  return NULL;
343  }
344 
345  for (size_t i = 0; i < cc_count; i++) {
346  cc[3*i + 0] = cdp[9 + 3*i+0] /* & 3 */;
347  cc[3*i + 1] = cdp[9 + 3*i+1];
348  cc[3*i + 2] = cdp[9 + 3*i+2];
349  }
350 
351  cc_count *= 3;
352  return cc;
353 }
354 
355 uint8_t *get_metadata(AVFormatContext *avctx, uint16_t *buf, size_t width,
356  uint8_t *tgt, size_t tgt_size, AVPacket *pkt)
357 {
358  decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
359  uint16_t *max_buf = buf + width;
360 
361  while (buf < max_buf - 6) {
362  int len;
363  uint16_t did = buf[3] & 0xFF; // data id
364  uint16_t sdid = buf[4] & 0xFF; // secondary data id
365  /* Check for VANC header */
366  if (buf[0] != 0 || buf[1] != 0x3ff || buf[2] != 0x3ff) {
367  return tgt;
368  }
369 
370  len = (buf[5] & 0xff) + 6 + 1;
371  if (len > max_buf - buf) {
372  av_log(avctx, AV_LOG_WARNING, "Data Count (%d) > data left (%zu)\n",
373  len, max_buf - buf);
374  return tgt;
375  }
376 
377  if (did == 0x43 && (sdid == 0x02 || sdid == 0x03) && cctx->teletext_lines &&
378  width == 1920 && tgt_size >= 1920) {
379  if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
380  av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
381  goto skip_packet;
382  }
383  tgt = teletext_data_unit_from_ancillary_packet(buf + 3, buf + len, tgt, cctx->teletext_lines, 1);
384  } else if (did == 0x61 && sdid == 0x01) {
385  unsigned int data_len;
386  uint8_t *data;
387  if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
388  av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
389  goto skip_packet;
390  }
391  clear_parity_bits(buf, len);
392  data = vanc_to_cc(avctx, buf, width, data_len);
393  if (data) {
394  if (av_packet_add_side_data(pkt, AV_PKT_DATA_A53_CC, data, data_len) < 0)
395  av_free(data);
396  }
397  } else {
398  av_log(avctx, AV_LOG_DEBUG, "Unknown meta data DID = 0x%.2x SDID = 0x%.2x\n",
399  did, sdid);
400  }
401 skip_packet:
402  buf += len;
403  }
404 
405  return tgt;
406 }
407 
409 {
410  struct decklink_cctx *ctx = (struct decklink_cctx *)avctx->priv_data;
411  memset(q, 0, sizeof(AVPacketQueue));
414  q->avctx = avctx;
415  q->max_q_size = ctx->queue_size;
416 }
417 
419 {
420  AVPacketList *pkt, *pkt1;
421 
423  for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
424  pkt1 = pkt->next;
425  av_packet_unref(&pkt->pkt);
426  av_freep(&pkt);
427  }
428  q->last_pkt = NULL;
429  q->first_pkt = NULL;
430  q->nb_packets = 0;
431  q->size = 0;
433 }
434 
436 {
440 }
441 
442 static unsigned long long avpacket_queue_size(AVPacketQueue *q)
443 {
444  unsigned long long size;
446  size = q->size;
448  return size;
449 }
450 
452 {
453  AVPacketList *pkt1;
454  int ret;
455 
456  // Drop Packet if queue size is > maximum queue size
457  if (avpacket_queue_size(q) > (uint64_t)q->max_q_size) {
458  av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");
459  return -1;
460  }
461 
462  pkt1 = (AVPacketList *)av_mallocz(sizeof(AVPacketList));
463  if (!pkt1) {
464  return -1;
465  }
466  ret = av_packet_ref(&pkt1->pkt, pkt);
467  av_packet_unref(pkt);
468  if (ret < 0) {
469  av_free(pkt1);
470  return -1;
471  }
472  pkt1->next = NULL;
473 
475 
476  if (!q->last_pkt) {
477  q->first_pkt = pkt1;
478  } else {
479  q->last_pkt->next = pkt1;
480  }
481 
482  q->last_pkt = pkt1;
483  q->nb_packets++;
484  q->size += pkt1->pkt.size + sizeof(*pkt1);
485 
487 
489  return 0;
490 }
491 
493 {
494  AVPacketList *pkt1;
495  int ret;
496 
498 
499  for (;; ) {
500  pkt1 = q->first_pkt;
501  if (pkt1) {
502  q->first_pkt = pkt1->next;
503  if (!q->first_pkt) {
504  q->last_pkt = NULL;
505  }
506  q->nb_packets--;
507  q->size -= pkt1->pkt.size + sizeof(*pkt1);
508  *pkt = pkt1->pkt;
509  av_free(pkt1);
510  ret = 1;
511  break;
512  } else if (!block) {
513  ret = 0;
514  break;
515  } else {
516  pthread_cond_wait(&q->cond, &q->mutex);
517  }
518  }
520  return ret;
521 }
522 
523 class decklink_input_callback : public IDeckLinkInputCallback
524 {
525 public:
528 
529  virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
530  virtual ULONG STDMETHODCALLTYPE AddRef(void);
531  virtual ULONG STDMETHODCALLTYPE Release(void);
532  virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags);
533  virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*);
534 
535 private:
540  int no_video;
543 };
544 
546 {
547  avctx = _avctx;
548  decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
549  ctx = (struct decklink_ctx *)cctx->ctx;
550  no_video = 0;
553 }
554 
556 {
558 }
559 
561 {
563  m_refCount++;
565 
566  return (ULONG)m_refCount;
567 }
568 
570 {
572  m_refCount--;
574 
575  if (m_refCount == 0) {
576  delete this;
577  return 0;
578  }
579 
580  return (ULONG)m_refCount;
581 }
582 
583 static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,
584  IDeckLinkAudioInputPacket *audioFrame,
585  int64_t wallclock,
586  DecklinkPtsSource pts_src,
587  AVRational time_base, int64_t *initial_pts)
588 {
589  int64_t pts = AV_NOPTS_VALUE;
590  BMDTimeValue bmd_pts;
591  BMDTimeValue bmd_duration;
592  HRESULT res = E_INVALIDARG;
593  switch (pts_src) {
594  case PTS_SRC_AUDIO:
595  if (audioFrame)
596  res = audioFrame->GetPacketTime(&bmd_pts, time_base.den);
597  break;
598  case PTS_SRC_VIDEO:
599  if (videoFrame)
600  res = videoFrame->GetStreamTime(&bmd_pts, &bmd_duration, time_base.den);
601  break;
602  case PTS_SRC_REFERENCE:
603  if (videoFrame)
604  res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration);
605  break;
606  case PTS_SRC_WALLCLOCK:
607  {
608  /* MSVC does not support compound literals like AV_TIME_BASE_Q
609  * in C++ code (compiler error C4576) */
610  AVRational timebase;
611  timebase.num = 1;
612  timebase.den = AV_TIME_BASE;
613  pts = av_rescale_q(wallclock, timebase, time_base);
614  break;
615  }
616  }
617  if (res == S_OK)
618  pts = bmd_pts / time_base.num;
619 
620  if (pts != AV_NOPTS_VALUE && *initial_pts == AV_NOPTS_VALUE)
621  *initial_pts = pts;
622  if (*initial_pts != AV_NOPTS_VALUE)
623  pts -= *initial_pts;
624 
625  return pts;
626 }
627 
629  IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)
630 {
631  void *frameBytes;
632  void *audioFrameBytes;
633  BMDTimeValue frameTime;
634  BMDTimeValue frameDuration;
635  int64_t wallclock = 0;
636 
637  ctx->frameCount++;
639  wallclock = av_gettime_relative();
640 
641  // Handle Video Frame
642  if (videoFrame) {
643  AVPacket pkt;
644  av_init_packet(&pkt);
645  if (ctx->frameCount % 25 == 0) {
646  unsigned long long qsize = avpacket_queue_size(&ctx->queue);
648  "Frame received (#%lu) - Valid (%liB) - QSize %fMB\n",
649  ctx->frameCount,
650  videoFrame->GetRowBytes() * videoFrame->GetHeight(),
651  (double)qsize / 1024 / 1024);
652  }
653 
654  videoFrame->GetBytes(&frameBytes);
655  videoFrame->GetStreamTime(&frameTime, &frameDuration,
657 
658  if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {
659  if (ctx->draw_bars && videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {
660  unsigned bars[8] = {
661  0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,
662  0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };
663  int width = videoFrame->GetWidth();
664  int height = videoFrame->GetHeight();
665  unsigned *p = (unsigned *)frameBytes;
666 
667  for (int y = 0; y < height; y++) {
668  for (int x = 0; x < width; x += 2)
669  *p++ = bars[(x * 8) / width];
670  }
671  }
672 
673  if (!no_video) {
674  av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected "
675  "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
676  }
677  no_video = 1;
678  } else {
679  if (no_video) {
680  av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned "
681  "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
682  }
683  no_video = 0;
684  }
685 
686  pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts);
687  pkt.dts = pkt.pts;
688 
689  pkt.duration = frameDuration;
690  //To be made sure it still applies
691  pkt.flags |= AV_PKT_FLAG_KEY;
692  pkt.stream_index = ctx->video_st->index;
693  pkt.data = (uint8_t *)frameBytes;
694  pkt.size = videoFrame->GetRowBytes() *
695  videoFrame->GetHeight();
696  //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);
697 
698  if (!no_video) {
699  IDeckLinkVideoFrameAncillary *vanc;
700  AVPacket txt_pkt;
701  uint8_t txt_buf0[3531]; // 35 * 46 bytes decoded teletext lines + 1 byte data_identifier + 1920 bytes OP47 decode buffer
702  uint8_t *txt_buf = txt_buf0;
703 
704  if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
705  int i;
706  int64_t line_mask = 1;
707  BMDPixelFormat vanc_format = vanc->GetPixelFormat();
708  txt_buf[0] = 0x10; // data_identifier - EBU_data
709  txt_buf++;
710 #if CONFIG_LIBZVBI
711  if (ctx->bmd_mode == bmdModePAL && ctx->teletext_lines &&
712  (vanc_format == bmdFormat8BitYUV || vanc_format == bmdFormat10BitYUV)) {
713  av_assert0(videoFrame->GetWidth() == 720);
714  for (i = 6; i < 336; i++, line_mask <<= 1) {
715  uint8_t *buf;
716  if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
717  if (vanc_format == bmdFormat8BitYUV)
718  txt_buf = teletext_data_unit_from_vbi_data(i, buf, txt_buf, VBI_PIXFMT_UYVY);
719  else
720  txt_buf = teletext_data_unit_from_vbi_data_10bit(i, buf, txt_buf);
721  }
722  if (i == 22)
723  i = 317;
724  }
725  }
726 #endif
727  if (vanc_format == bmdFormat10BitYUV && videoFrame->GetWidth() <= MAX_WIDTH_VANC) {
728  int idx = get_vanc_line_idx(ctx->bmd_mode);
729  for (i = vanc_line_numbers[idx].vanc_start; i <= vanc_line_numbers[idx].vanc_end; i++) {
730  uint8_t *buf;
731  if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
732  uint16_t luma_vanc[MAX_WIDTH_VANC];
733  extract_luma_from_v210(luma_vanc, buf, videoFrame->GetWidth());
734  txt_buf = get_metadata(avctx, luma_vanc, videoFrame->GetWidth(),
735  txt_buf, sizeof(txt_buf0) - (txt_buf - txt_buf0), &pkt);
736  }
737  if (i == vanc_line_numbers[idx].field0_vanc_end)
738  i = vanc_line_numbers[idx].field1_vanc_start - 1;
739  }
740  }
741  vanc->Release();
742  if (txt_buf - txt_buf0 > 1) {
743  int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;
744  while (stuffing_units--) {
745  memset(txt_buf, 0xff, 46);
746  txt_buf[1] = 0x2c; // data_unit_length
747  txt_buf += 46;
748  }
749  av_init_packet(&txt_pkt);
750  txt_pkt.pts = pkt.pts;
751  txt_pkt.dts = pkt.dts;
752  txt_pkt.stream_index = ctx->teletext_st->index;
753  txt_pkt.data = txt_buf0;
754  txt_pkt.size = txt_buf - txt_buf0;
755  if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) {
756  ++ctx->dropped;
757  }
758  }
759  }
760  }
761 
762  if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
763  ++ctx->dropped;
764  }
765  }
766 
767  // Handle Audio Frame
768  if (audioFrame) {
769  AVPacket pkt;
770  BMDTimeValue audio_pts;
771  av_init_packet(&pkt);
772 
773  //hack among hacks
774  pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->channels * (16 / 8);
775  audioFrame->GetBytes(&audioFrameBytes);
776  audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);
777  pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts);
778  pkt.dts = pkt.pts;
779 
780  //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts);
781  pkt.flags |= AV_PKT_FLAG_KEY;
782  pkt.stream_index = ctx->audio_st->index;
783  pkt.data = (uint8_t *)audioFrameBytes;
784 
785  if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
786  ++ctx->dropped;
787  }
788  }
789 
790  return S_OK;
791 }
792 
794  BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,
795  BMDDetectedVideoInputFormatFlags)
796 {
797  return S_OK;
798 }
799 
801 {
802  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
803  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
804 
805  ctx->input_callback = new decklink_input_callback(avctx);
806  ctx->dli->SetCallback(ctx->input_callback);
807  return ctx->dli->StartStreams();
808 }
809 
810 extern "C" {
811 
813 {
814  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
815  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
816 
817  if (ctx->capture_started) {
818  ctx->dli->StopStreams();
819  ctx->dli->DisableVideoInput();
820  ctx->dli->DisableAudioInput();
821  }
822 
823  ff_decklink_cleanup(avctx);
824  avpacket_queue_end(&ctx->queue);
825 
826  av_freep(&cctx->ctx);
827 
828  return 0;
829 }
830 
832 {
833  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
834  struct decklink_ctx *ctx;
835  AVStream *st;
836  HRESULT result;
837  char fname[1024];
838  char *tmp;
839  int mode_num = 0;
840  int ret;
841 
842  ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));
843  if (!ctx)
844  return AVERROR(ENOMEM);
845  ctx->list_devices = cctx->list_devices;
846  ctx->list_formats = cctx->list_formats;
847  ctx->teletext_lines = cctx->teletext_lines;
848  ctx->preroll = cctx->preroll;
849  ctx->duplex_mode = cctx->duplex_mode;
850  if (cctx->video_input > 0 && (unsigned int)cctx->video_input < FF_ARRAY_ELEMS(decklink_video_connection_map))
851  ctx->video_input = decklink_video_connection_map[cctx->video_input];
852  if (cctx->audio_input > 0 && (unsigned int)cctx->audio_input < FF_ARRAY_ELEMS(decklink_audio_connection_map))
853  ctx->audio_input = decklink_audio_connection_map[cctx->audio_input];
854  ctx->audio_pts_source = cctx->audio_pts_source;
855  ctx->video_pts_source = cctx->video_pts_source;
856  ctx->draw_bars = cctx->draw_bars;
857  cctx->ctx = ctx;
858 
859  /* Check audio channel option for valid values: 2, 8 or 16 */
860  switch (cctx->audio_channels) {
861  case 2:
862  case 8:
863  case 16:
864  break;
865  default:
866  av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n");
867  return AVERROR(EINVAL);
868  }
869 
870  /* List available devices. */
871  if (ctx->list_devices) {
872  ff_decklink_list_devices_legacy(avctx, 1, 0);
873  return AVERROR_EXIT;
874  }
875 
876  if (cctx->v210) {
877  av_log(avctx, AV_LOG_WARNING, "The bm_v210 option is deprecated and will be removed. Please use the -raw_format yuv422p10.\n");
878  cctx->raw_format = MKBETAG('v','2','1','0');
879  }
880 
881  strcpy (fname, avctx->filename);
882  tmp=strchr (fname, '@');
883  if (tmp != NULL) {
884  av_log(avctx, AV_LOG_WARNING, "The @mode syntax is deprecated and will be removed. Please use the -format_code option.\n");
885  mode_num = atoi (tmp+1);
886  *tmp = 0;
887  }
888 
889  ret = ff_decklink_init_device(avctx, fname);
890  if (ret < 0)
891  return ret;
892 
893  /* Get input device. */
894  if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) {
895  av_log(avctx, AV_LOG_ERROR, "Could not open input device from '%s'\n",
896  avctx->filename);
897  ret = AVERROR(EIO);
898  goto error;
899  }
900 
901  /* List supported formats. */
902  if (ctx->list_formats) {
904  ret = AVERROR_EXIT;
905  goto error;
906  }
907 
908  if (mode_num > 0 || cctx->format_code) {
909  if (ff_decklink_set_format(avctx, DIRECTION_IN, mode_num) < 0) {
910  av_log(avctx, AV_LOG_ERROR, "Could not set mode number %d or format code %s for %s\n",
911  mode_num, (cctx->format_code) ? cctx->format_code : "(unset)", fname);
912  ret = AVERROR(EIO);
913  goto error;
914  }
915  }
916 
917 #if !CONFIG_LIBZVBI
918  if (ctx->teletext_lines && ctx->bmd_mode == bmdModePAL) {
919  av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing SD PAL teletext, please recompile FFmpeg.\n");
920  ret = AVERROR(ENOSYS);
921  goto error;
922  }
923 #endif
924 
925  /* Setup streams. */
926  st = avformat_new_stream(avctx, NULL);
927  if (!st) {
928  av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
929  ret = AVERROR(ENOMEM);
930  goto error;
931  }
932  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
933  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
934  st->codecpar->sample_rate = bmdAudioSampleRate48kHz;
935  st->codecpar->channels = cctx->audio_channels;
936  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
937  ctx->audio_st=st;
938 
939  st = avformat_new_stream(avctx, NULL);
940  if (!st) {
941  av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
942  ret = AVERROR(ENOMEM);
943  goto error;
944  }
945  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
946  st->codecpar->width = ctx->bmd_width;
947  st->codecpar->height = ctx->bmd_height;
948 
949  st->time_base.den = ctx->bmd_tb_den;
950  st->time_base.num = ctx->bmd_tb_num;
951  av_stream_set_r_frame_rate(st, av_make_q(st->time_base.den, st->time_base.num));
952 
953  switch((BMDPixelFormat)cctx->raw_format) {
954  case bmdFormat8BitYUV:
955  st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
956  st->codecpar->codec_tag = MKTAG('U', 'Y', 'V', 'Y');
957  st->codecpar->format = AV_PIX_FMT_UYVY422;
958  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 16, st->time_base.den, st->time_base.num);
959  break;
960  case bmdFormat10BitYUV:
961  st->codecpar->codec_id = AV_CODEC_ID_V210;
962  st->codecpar->codec_tag = MKTAG('V','2','1','0');
963  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 64, st->time_base.den, st->time_base.num * 3);
964  st->codecpar->bits_per_coded_sample = 10;
965  break;
966  case bmdFormat8BitARGB:
967  st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
968  st->codecpar->codec_tag = avcodec_pix_fmt_to_codec_tag((enum AVPixelFormat)st->codecpar->format);;
969  st->codecpar->format = AV_PIX_FMT_0RGB;
970  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
971  break;
972  case bmdFormat8BitBGRA:
973  st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
974  st->codecpar->codec_tag = avcodec_pix_fmt_to_codec_tag((enum AVPixelFormat)st->codecpar->format);
975  st->codecpar->format = AV_PIX_FMT_BGR0;
976  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
977  break;
978  case bmdFormat10BitRGB:
979  st->codecpar->codec_id = AV_CODEC_ID_R210;
980  st->codecpar->codec_tag = MKTAG('R','2','1','0');
981  st->codecpar->format = AV_PIX_FMT_RGB48LE;
982  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 30, st->time_base.den, st->time_base.num);
983  st->codecpar->bits_per_coded_sample = 10;
984  break;
985  default:
986  av_log(avctx, AV_LOG_ERROR, "Raw Format %.4s not supported\n", (char*) &cctx->raw_format);
987  ret = AVERROR(EINVAL);
988  goto error;
989  }
990 
991  switch (ctx->bmd_field_dominance) {
992  case bmdUpperFieldFirst:
993  st->codecpar->field_order = AV_FIELD_TT;
994  break;
995  case bmdLowerFieldFirst:
996  st->codecpar->field_order = AV_FIELD_BB;
997  break;
998  case bmdProgressiveFrame:
999  case bmdProgressiveSegmentedFrame:
1000  st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
1001  break;
1002  }
1003 
1004  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1005 
1006  ctx->video_st=st;
1007 
1008  if (ctx->teletext_lines) {
1009  st = avformat_new_stream(avctx, NULL);
1010  if (!st) {
1011  av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1012  ret = AVERROR(ENOMEM);
1013  goto error;
1014  }
1015  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1016  st->time_base.den = ctx->bmd_tb_den;
1017  st->time_base.num = ctx->bmd_tb_num;
1018  st->codecpar->codec_id = AV_CODEC_ID_DVB_TELETEXT;
1019  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1020  ctx->teletext_st = st;
1021  }
1022 
1023  av_log(avctx, AV_LOG_VERBOSE, "Using %d input audio channels\n", ctx->audio_st->codecpar->channels);
1024  result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, ctx->audio_st->codecpar->channels);
1025 
1026  if (result != S_OK) {
1027  av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n");
1028  ret = AVERROR(EIO);
1029  goto error;
1030  }
1031 
1032  result = ctx->dli->EnableVideoInput(ctx->bmd_mode,
1033  (BMDPixelFormat) cctx->raw_format,
1034  bmdVideoInputFlagDefault);
1035 
1036  if (result != S_OK) {
1037  av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n");
1038  ret = AVERROR(EIO);
1039  goto error;
1040  }
1041 
1042  avpacket_queue_init (avctx, &ctx->queue);
1043 
1044  if (decklink_start_input (avctx) != S_OK) {
1045  av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n");
1046  ret = AVERROR(EIO);
1047  goto error;
1048  }
1049 
1050  return 0;
1051 
1052 error:
1053  ff_decklink_cleanup(avctx);
1054  return ret;
1055 }
1056 
1058 {
1059  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1060  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
1061 
1062  avpacket_queue_get(&ctx->queue, pkt, 1);
1063 
1064  return 0;
1065 }
1066 
1068 {
1069  return ff_decklink_list_devices(avctx, device_list, 1, 0);
1070 }
1071 
1072 } /* extern "C" */
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:82
#define NULL
Definition: coverity.c:32
static int shift(int a, int b)
Definition: sonic.c:82
static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
Definition: os2threads.h:106
#define S_OK
Definition: windows2linux.h:40
#define pthread_mutex_lock(a)
Definition: ffprobe.c:61
static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
Definition: os2threads.h:164
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
const char * fmt
Definition: avisynth_c.h:769
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4737
const uint8_t ff_reverse[256]
Definition: reverse.c:23
ATSC A53 Part 4 Closed Captions.
Definition: avcodec.h:1607
void av_stream_set_r_frame_rate(AVStream *s, AVRational r)
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:890
int size
Definition: avcodec.h:1680
BMDDisplayMode mode
Convenience header that includes libavutil's core.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
static AVPacket pkt
pthread_cond_t cond
#define src
Definition: vp8dsp.c:254
static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
Definition: os2threads.h:138
Format I/O context.
Definition: avformat.h:1349
static int16_t block[64]
Definition: dct.c:115
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
HMTX pthread_mutex_t
Definition: os2threads.h:49
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
pthread_mutex_t mutex
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:111
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt)
Return a value representing the fourCC code associated to the pixel format pix_fmt, or 0 if no associated fourCC code can be found.
Definition: raw.c:298
AVPacket pkt
Definition: avformat.h:1970
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1697
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4367
#define height
uint8_t * data
Definition: avcodec.h:1679
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
Definition: os2threads.h:146
ptrdiff_t size
Definition: opengl_enc.c:101
#define E_NOINTERFACE
Definition: windows2linux.h:42
#define av_log(a,...)
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:627
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1711
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Main libavdevice API header.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const uint16_t mask[17]
Definition: lzw.c:38
AVPacketList * last_pkt
#define AVERROR(e)
Definition: error.h:43
#define FALSE
Definition: windows2linux.h:37
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
Definition: graph2dot.c:48
uint16_t width
Definition: gdv.c:47
simple assert() macros that are a bit more flexible than ISO C assert().
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1685
char filename[1024]
input or output filename
Definition: avformat.h:1425
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
#define FFMIN(a, b)
Definition: common.h:96
AVPacketList * first_pkt
unsigned long long size
AVFormatContext * ctx
Definition: movenc.c:48
static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
Definition: os2threads.h:98
#define pthread_mutex_unlock(a)
Definition: ffprobe.c:65
static volatile int checksum
Definition: adler32.c:30
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
static void error(const char *err)
#define FF_ARRAY_ELEMS(a)
Stream structure.
Definition: avformat.h:889
void * LPVOID
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:618
void * buf
Definition: avisynth_c.h:690
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as a packet side data.
Definition: avpacket.c:295
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:254
int64_t max_q_size
AVFormatContext * avctx
List of devices.
Definition: avdevice.h:460
static int64_t pts
Global timestamp for the audio frames.
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
DWORD HRESULT
#define av_parity
Definition: intmath.h:158
Main libavformat public API header.
struct AVPacketList * next
Definition: avformat.h:1971
common internal and external API header
uint32_t ULONG
static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
Definition: os2threads.h:127
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int den
Denominator.
Definition: rational.h:60
#define MKBETAG(a, b, c, d)
Definition: common.h:343
#define av_free(p)
int len
void * priv_data
Format private data.
Definition: avformat.h:1377
int channels
Audio only.
Definition: avcodec.h:4258
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1678
#define av_freep(p)
AVCodecParameters * codecpar
Definition: avformat.h:1252
int stream_index
Definition: avcodec.h:1681
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
#define MKTAG(a, b, c, d)
Definition: common.h:342
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:251
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1656
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1672
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
static uint8_t tmp[11]
Definition: aes_ctr.c:26