FFmpeg
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 <atomic>
25 #include <vector>
26 using std::atomic;
27 
28 /* Include internal.h first to avoid conflict between winsock.h (used by
29  * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
30 extern "C" {
31 #include "libavformat/internal.h"
32 }
33 
34 #include <DeckLinkAPI.h>
35 
36 extern "C" {
37 #include "config.h"
39 #include "libavformat/avformat.h"
40 #include "libavutil/avassert.h"
41 #include "libavutil/avutil.h"
42 #include "libavutil/common.h"
43 #include "libavutil/internal.h"
44 #include "libavutil/imgutils.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/time.h"
47 #include "libavutil/timecode.h"
48 #include "libavutil/mathematics.h"
49 #include "libavutil/reverse.h"
50 #include "avdevice.h"
51 #if CONFIG_LIBZVBI
52 #include <libzvbi.h>
53 #endif
54 }
55 
56 #include "decklink_common.h"
57 #include "decklink_dec.h"
58 
59 #define MAX_WIDTH_VANC 1920
60 const BMDDisplayMode AUTODETECT_DEFAULT_MODE = bmdModeNTSC;
61 
62 typedef struct VANCLineNumber {
63  BMDDisplayMode mode;
67  int vanc_end;
69 
70 /* These VANC line numbers need not be very accurate. In any case
71  * GetBufferForVerticalBlankingLine() will return an error when invalid
72  * ancillary line number was requested. We just need to make sure that the
73  * entire VANC region is covered, while making sure we don't decode VANC of
74  * another source during switching*/
76  /* SD Modes */
77 
78  {bmdModeNTSC, 11, 19, 274, 282},
79  {bmdModeNTSC2398, 11, 19, 274, 282},
80  {bmdModePAL, 7, 22, 320, 335},
81  {bmdModeNTSCp, 11, -1, -1, 39},
82  {bmdModePALp, 7, -1, -1, 45},
83 
84  /* HD 1080 Modes */
85 
86  {bmdModeHD1080p2398, 8, -1, -1, 42},
87  {bmdModeHD1080p24, 8, -1, -1, 42},
88  {bmdModeHD1080p25, 8, -1, -1, 42},
89  {bmdModeHD1080p2997, 8, -1, -1, 42},
90  {bmdModeHD1080p30, 8, -1, -1, 42},
91  {bmdModeHD1080i50, 8, 20, 570, 585},
92  {bmdModeHD1080i5994, 8, 20, 570, 585},
93  {bmdModeHD1080i6000, 8, 20, 570, 585},
94  {bmdModeHD1080p50, 8, -1, -1, 42},
95  {bmdModeHD1080p5994, 8, -1, -1, 42},
96  {bmdModeHD1080p6000, 8, -1, -1, 42},
97 
98  /* HD 720 Modes */
99 
100  {bmdModeHD720p50, 8, -1, -1, 26},
101  {bmdModeHD720p5994, 8, -1, -1, 26},
102  {bmdModeHD720p60, 8, -1, -1, 26},
103 
104  /* For all other modes, for which we don't support VANC */
105  {bmdModeUnknown, 0, -1, -1, -1}
106 };
107 
108 class decklink_allocator : public IDeckLinkMemoryAllocator
109 {
110 public:
112  virtual ~decklink_allocator() { }
113 
114  // IDeckLinkMemoryAllocator methods
115  virtual HRESULT STDMETHODCALLTYPE AllocateBuffer(unsigned int bufferSize, void* *allocatedBuffer)
116  {
117  void *buf = av_malloc(bufferSize + AV_INPUT_BUFFER_PADDING_SIZE);
118  if (!buf)
119  return E_OUTOFMEMORY;
120  *allocatedBuffer = buf;
121  return S_OK;
122  }
123  virtual HRESULT STDMETHODCALLTYPE ReleaseBuffer(void* buffer)
124  {
125  av_free(buffer);
126  return S_OK;
127  }
128  virtual HRESULT STDMETHODCALLTYPE Commit() { return S_OK; }
129  virtual HRESULT STDMETHODCALLTYPE Decommit() { return S_OK; }
130 
131  // IUnknown methods
132  virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
133  virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; }
134  virtual ULONG STDMETHODCALLTYPE Release(void)
135  {
136  int ret = --_refs;
137  if (!ret)
138  delete this;
139  return ret;
140  }
141 
142 private:
143  std::atomic<int> _refs;
144 };
145 
146 extern "C" {
147 static void decklink_object_free(void *opaque, uint8_t *data)
148 {
149  IUnknown *obj = (class IUnknown *)opaque;
150  obj->Release();
151 }
152 }
153 
154 static int get_vanc_line_idx(BMDDisplayMode mode)
155 {
156  unsigned int i;
157  for (i = 0; i < FF_ARRAY_ELEMS(vanc_line_numbers); i++) {
158  if (mode == vanc_line_numbers[i].mode)
159  return i;
160  }
161  /* Return the VANC idx for Unknown mode */
162  return i - 1;
163 }
164 
165 static inline void clear_parity_bits(uint16_t *buf, int len) {
166  int i;
167  for (i = 0; i < len; i++)
168  buf[i] &= 0xff;
169 }
170 
171 static int check_vanc_parity_checksum(uint16_t *buf, int len, uint16_t checksum) {
172  int i;
173  uint16_t vanc_sum = 0;
174  for (i = 3; i < len - 1; i++) {
175  uint16_t v = buf[i];
176  int np = v >> 8;
177  int p = av_parity(v & 0xff);
178  if ((!!p ^ !!(v & 0x100)) || (np != 1 && np != 2)) {
179  // Parity check failed
180  return -1;
181  }
182  vanc_sum += v;
183  }
184  vanc_sum &= 0x1ff;
185  vanc_sum |= ((~vanc_sum & 0x100) << 1);
186  if (checksum != vanc_sum) {
187  // Checksum verification failed
188  return -1;
189  }
190  return 0;
191 }
192 
193 /* The 10-bit VANC data is packed in V210, we only need the luma component. */
194 static void extract_luma_from_v210(uint16_t *dst, const uint8_t *src, int width)
195 {
196  int i;
197  for (i = 0; i < width / 3; i++) {
198  *dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
199  *dst++ = src[4] + ((src[5] & 3) << 8);
200  *dst++ = (src[6] >> 4) + ((src[7] & 63) << 4);
201  src += 8;
202  }
203 }
204 
205 static void unpack_v210(uint16_t *dst, const uint8_t *src, int width)
206 {
207  int i;
208  for (i = 0; i < width * 2 / 3; i++) {
209  *dst++ = src[0] + ((src[1] & 3) << 8);
210  *dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
211  *dst++ = (src[2] >> 4) + ((src[3] & 63) << 4);
212  src += 4;
213  }
214 }
215 
217 {
218  uint8_t ret = (line < 313) << 5;
219  if (line >= 7 && line <= 22)
220  ret += line;
221  if (line >= 320 && line <= 335)
222  ret += (line - 313);
223  return ret;
224 }
225 
226 static void fill_data_unit_head(int line, uint8_t *tgt)
227 {
228  tgt[0] = 0x02; // data_unit_id
229  tgt[1] = 0x2c; // data_unit_length
230  tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset
231  tgt[3] = 0xe4; // framing code
232 }
233 
234 #if CONFIG_LIBZVBI
235 static uint8_t* teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt, vbi_pixfmt fmt)
236 {
237  vbi_bit_slicer slicer;
238 
239  vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, fmt);
240 
241  if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE)
242  return tgt;
243 
245 
246  return tgt + 46;
247 }
248 
249 static uint8_t* teletext_data_unit_from_vbi_data_10bit(int line, uint8_t *src, uint8_t *tgt)
250 {
251  uint8_t y[720];
252  uint8_t *py = y;
253  uint8_t *pend = y + 720;
254  /* The 10-bit VBI data is packed in V210, but libzvbi only supports 8-bit,
255  * so we extract the 8 MSBs of the luma component, that is enough for
256  * teletext bit slicing. */
257  while (py < pend) {
258  *py++ = (src[1] >> 4) + ((src[2] & 15) << 4);
259  *py++ = (src[4] >> 2) + ((src[5] & 3 ) << 6);
260  *py++ = (src[6] >> 6) + ((src[7] & 63) << 2);
261  src += 8;
262  }
263  return teletext_data_unit_from_vbi_data(line, y, tgt, VBI_PIXFMT_YUV420);
264 }
265 #endif
266 
267 static uint8_t* teletext_data_unit_from_op47_vbi_packet(int line, uint16_t *py, uint8_t *tgt)
268 {
269  int i;
270 
271  if (py[0] != 0x255 || py[1] != 0x255 || py[2] != 0x227)
272  return tgt;
273 
275 
276  py += 3;
277  tgt += 4;
278 
279  for (i = 0; i < 42; i++)
280  *tgt++ = ff_reverse[py[i] & 255];
281 
282  return tgt;
283 }
284 
285 static int linemask_matches(int line, int64_t mask)
286 {
287  int shift = -1;
288  if (line >= 6 && line <= 22)
289  shift = line - 6;
290  if (line >= 318 && line <= 335)
291  shift = line - 318 + 17;
292  return shift >= 0 && ((1ULL << shift) & mask);
293 }
294 
295 static uint8_t* teletext_data_unit_from_op47_data(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines)
296 {
297  if (py < pend - 9) {
298  if (py[0] == 0x151 && py[1] == 0x115 && py[3] == 0x102) { // identifier, identifier, format code for WST teletext
299  uint16_t *descriptors = py + 4;
300  int i;
301  py += 9;
302  for (i = 0; i < 5 && py < pend - 45; i++, py += 45) {
303  int line = (descriptors[i] & 31) + (!(descriptors[i] & 128)) * 313;
304  if (line && linemask_matches(line, wanted_lines))
306  }
307  }
308  }
309  return tgt;
310 }
311 
312 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)
313 {
314  uint16_t did = py[0]; // data id
315  uint16_t sdid = py[1]; // secondary data id
316  uint16_t dc = py[2] & 255; // data count
317  py += 3;
318  pend = FFMIN(pend, py + dc);
319  if (did == 0x143 && sdid == 0x102) { // subtitle distribution packet
320  tgt = teletext_data_unit_from_op47_data(py, pend, tgt, wanted_lines);
321  } else if (allow_multipacket && did == 0x143 && sdid == 0x203) { // VANC multipacket
322  py += 2; // priority, line/field
323  while (py < pend - 3) {
324  tgt = teletext_data_unit_from_ancillary_packet(py, pend, tgt, wanted_lines, 0);
325  py += 4 + (py[2] & 255); // ndid, nsdid, ndc, line/field
326  }
327  }
328  return tgt;
329 }
330 
331 static uint8_t *vanc_to_cc(AVFormatContext *avctx, uint16_t *buf, size_t words,
332  unsigned &cc_count)
333 {
334  size_t i, len = (buf[5] & 0xff) + 6 + 1;
335  uint8_t cdp_sum, rate;
336  uint16_t hdr, ftr;
337  uint8_t *cc;
338  uint16_t *cdp = &buf[6]; // CDP follows
339  if (cdp[0] != 0x96 || cdp[1] != 0x69) {
340  av_log(avctx, AV_LOG_WARNING, "Invalid CDP header 0x%.2x 0x%.2x\n", cdp[0], cdp[1]);
341  return NULL;
342  }
343 
344  len -= 7; // remove VANC header and checksum
345 
346  if (cdp[2] != len) {
347  av_log(avctx, AV_LOG_WARNING, "CDP len %d != %zu\n", cdp[2], len);
348  return NULL;
349  }
350 
351  cdp_sum = 0;
352  for (i = 0; i < len - 1; i++)
353  cdp_sum += cdp[i];
354  cdp_sum = cdp_sum ? 256 - cdp_sum : 0;
355  if (cdp[len - 1] != cdp_sum) {
356  av_log(avctx, AV_LOG_WARNING, "CDP checksum invalid 0x%.4x != 0x%.4x\n", cdp_sum, cdp[len-1]);
357  return NULL;
358  }
359 
360  rate = cdp[3];
361  if (!(rate & 0x0f)) {
362  av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
363  return NULL;
364  }
365  rate >>= 4;
366  if (rate > 8) {
367  av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
368  return NULL;
369  }
370 
371  if (!(cdp[4] & 0x43)) /* ccdata_present | caption_service_active | reserved */ {
372  av_log(avctx, AV_LOG_WARNING, "CDP flags invalid (0x%.2x)\n", cdp[4]);
373  return NULL;
374  }
375 
376  hdr = (cdp[5] << 8) | cdp[6];
377  if (cdp[7] != 0x72) /* ccdata_id */ {
378  av_log(avctx, AV_LOG_WARNING, "Invalid ccdata_id 0x%.2x\n", cdp[7]);
379  return NULL;
380  }
381 
382  cc_count = cdp[8];
383  if (!(cc_count & 0xe0)) {
384  av_log(avctx, AV_LOG_WARNING, "Invalid cc_count 0x%.2x\n", cc_count);
385  return NULL;
386  }
387 
388  cc_count &= 0x1f;
389  if ((len - 13) < cc_count * 3) {
390  av_log(avctx, AV_LOG_WARNING, "Invalid cc_count %d (> %zu)\n", cc_count * 3, len - 13);
391  return NULL;
392  }
393 
394  if (cdp[len - 4] != 0x74) /* footer id */ {
395  av_log(avctx, AV_LOG_WARNING, "Invalid footer id 0x%.2x\n", cdp[len-4]);
396  return NULL;
397  }
398 
399  ftr = (cdp[len - 3] << 8) | cdp[len - 2];
400  if (ftr != hdr) {
401  av_log(avctx, AV_LOG_WARNING, "Header 0x%.4x != Footer 0x%.4x\n", hdr, ftr);
402  return NULL;
403  }
404 
405  cc = (uint8_t *)av_malloc(cc_count * 3);
406  if (cc == NULL) {
407  av_log(avctx, AV_LOG_WARNING, "CC - av_malloc failed for cc_count = %d\n", cc_count);
408  return NULL;
409  }
410 
411  for (size_t i = 0; i < cc_count; i++) {
412  cc[3*i + 0] = cdp[9 + 3*i+0] /* & 3 */;
413  cc[3*i + 1] = cdp[9 + 3*i+1];
414  cc[3*i + 2] = cdp[9 + 3*i+2];
415  }
416 
417  cc_count *= 3;
418  return cc;
419 }
420 
421 static uint8_t *get_metadata(AVFormatContext *avctx, uint16_t *buf, size_t width,
422  uint8_t *tgt, size_t tgt_size, AVPacket *pkt)
423 {
424  decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
425  uint16_t *max_buf = buf + width;
426 
427  while (buf < max_buf - 6) {
428  int len;
429  uint16_t did = buf[3] & 0xFF; // data id
430  uint16_t sdid = buf[4] & 0xFF; // secondary data id
431  /* Check for VANC header */
432  if (buf[0] != 0 || buf[1] != 0x3ff || buf[2] != 0x3ff) {
433  return tgt;
434  }
435 
436  len = (buf[5] & 0xff) + 6 + 1;
437  if (len > max_buf - buf) {
438  av_log(avctx, AV_LOG_WARNING, "Data Count (%d) > data left (%zu)\n",
439  len, max_buf - buf);
440  return tgt;
441  }
442 
443  if (did == 0x43 && (sdid == 0x02 || sdid == 0x03) && cctx->teletext_lines &&
444  width == 1920 && tgt_size >= 1920) {
445  if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
446  av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
447  goto skip_packet;
448  }
449  tgt = teletext_data_unit_from_ancillary_packet(buf + 3, buf + len, tgt, cctx->teletext_lines, 1);
450  } else if (did == 0x61 && sdid == 0x01) {
451  unsigned int data_len;
452  uint8_t *data;
453  if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
454  av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
455  goto skip_packet;
456  }
457  clear_parity_bits(buf, len);
458  data = vanc_to_cc(avctx, buf, width, data_len);
459  if (data) {
460  if (av_packet_add_side_data(pkt, AV_PKT_DATA_A53_CC, data, data_len) < 0)
461  av_free(data);
462  }
463  } else {
464  av_log(avctx, AV_LOG_DEBUG, "Unknown meta data DID = 0x%.2x SDID = 0x%.2x\n",
465  did, sdid);
466  }
467 skip_packet:
468  buf += len;
469  }
470 
471  return tgt;
472 }
473 
474 
475 static void handle_klv(AVFormatContext *avctx, decklink_ctx *ctx, IDeckLinkVideoInputFrame *videoFrame, int64_t pts)
476 {
477  const uint8_t KLV_DID = 0x44;
478  const uint8_t KLV_IN_VANC_SDID = 0x04;
479 
480  struct KLVPacket
481  {
482  uint16_t sequence_counter;
483  std::vector<uint8_t> data;
484  };
485 
486  size_t total_size = 0;
487  std::vector<std::vector<KLVPacket>> klv_packets(256);
488 
489  IDeckLinkVideoFrameAncillaryPackets *packets = nullptr;
490  if (videoFrame->QueryInterface(IID_IDeckLinkVideoFrameAncillaryPackets, (void**)&packets) != S_OK)
491  return;
492 
493  IDeckLinkAncillaryPacketIterator *it = nullptr;
494  if (packets->GetPacketIterator(&it) != S_OK) {
495  packets->Release();
496  return;
497  }
498 
499  IDeckLinkAncillaryPacket *packet = nullptr;
500  while (it->Next(&packet) == S_OK) {
501  uint8_t *data = nullptr;
502  uint32_t size = 0;
503 
504  if (packet->GetDID() == KLV_DID && packet->GetSDID() == KLV_IN_VANC_SDID) {
505  av_log(avctx, AV_LOG_DEBUG, "Found KLV VANC packet on line: %d\n", packet->GetLineNumber());
506 
507  if (packet->GetBytes(bmdAncillaryPacketFormatUInt8, (const void**) &data, &size) == S_OK) {
508  // MID and PSC
509  if (size > 3) {
510  uint8_t mid = data[0];
511  uint16_t psc = data[1] << 8 | data[2];
512 
513  av_log(avctx, AV_LOG_DEBUG, "KLV with MID: %d and PSC: %d\n", mid, psc);
514 
515  auto& list = klv_packets[mid];
516  uint16_t expected_psc = list.size() + 1;
517 
518  if (psc == expected_psc) {
519  uint32_t data_len = size - 3;
520  total_size += data_len;
521 
522  KLVPacket packet{ psc };
523  packet.data.resize(data_len);
524  memcpy(packet.data.data(), data + 3, data_len);
525 
526  list.push_back(std::move(packet));
527  } else {
528  av_log(avctx, AV_LOG_WARNING, "Out of order PSC: %d for MID: %d\n", psc, mid);
529 
530  if (!list.empty()) {
531  for (auto& klv : list)
532  total_size -= klv.data.size();
533 
534  list.clear();
535  }
536  }
537  }
538  }
539  }
540 
541  packet->Release();
542  }
543 
544  it->Release();
545  packets->Release();
546 
547  if (total_size > 0) {
548  std::vector<uint8_t> klv;
549  klv.reserve(total_size);
550 
551  for (size_t i = 0; i < klv_packets.size(); ++i) {
552  auto& list = klv_packets[i];
553 
554  if (list.empty())
555  continue;
556 
557  av_log(avctx, AV_LOG_DEBUG, "Joining MID: %d\n", (int)i);
558 
559  for (auto& packet : list)
560  klv.insert(klv.end(), packet.data.begin(), packet.data.end());
561  }
562 
563  AVPacket klv_packet = { 0 };
564  klv_packet.pts = pts;
565  klv_packet.dts = pts;
566  klv_packet.flags |= AV_PKT_FLAG_KEY;
567  klv_packet.stream_index = ctx->klv_st->index;
568  klv_packet.data = klv.data();
569  klv_packet.size = klv.size();
570 
571  if (ff_decklink_packet_queue_put(&ctx->queue, &klv_packet) < 0) {
572  ++ctx->dropped;
573  }
574  }
575 }
576 
577 class decklink_input_callback : public IDeckLinkInputCallback
578 {
579 public:
580  explicit decklink_input_callback(AVFormatContext *_avctx);
582 
583  virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
584  virtual ULONG STDMETHODCALLTYPE AddRef(void);
585  virtual ULONG STDMETHODCALLTYPE Release(void);
586  virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags);
587  virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*);
588 
589 private:
590  std::atomic<int> _refs;
593  int no_video;
596 };
597 
599 {
600  avctx = _avctx;
601  decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
602  ctx = (struct decklink_ctx *)cctx->ctx;
603  no_video = 0;
605 }
606 
608 {
609 }
610 
612 {
613  return ++_refs;
614 }
615 
617 {
618  int ret = --_refs;
619  if (!ret)
620  delete this;
621  return ret;
622 }
623 
624 static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,
625  IDeckLinkAudioInputPacket *audioFrame,
626  int64_t wallclock,
627  int64_t abs_wallclock,
628  DecklinkPtsSource pts_src,
629  AVRational time_base, int64_t *initial_pts,
630  int copyts)
631 {
632  int64_t pts = AV_NOPTS_VALUE;
633  BMDTimeValue bmd_pts;
634  BMDTimeValue bmd_duration;
635  HRESULT res = E_INVALIDARG;
636  switch (pts_src) {
637  case PTS_SRC_AUDIO:
638  if (audioFrame)
639  res = audioFrame->GetPacketTime(&bmd_pts, time_base.den);
640  break;
641  case PTS_SRC_VIDEO:
642  if (videoFrame)
643  res = videoFrame->GetStreamTime(&bmd_pts, &bmd_duration, time_base.den);
644  break;
645  case PTS_SRC_REFERENCE:
646  if (videoFrame)
647  res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration);
648  break;
649  case PTS_SRC_WALLCLOCK:
650  /* fall through */
652  {
653  /* MSVC does not support compound literals like AV_TIME_BASE_Q
654  * in C++ code (compiler error C4576) */
655  AVRational timebase;
656  timebase.num = 1;
657  timebase.den = AV_TIME_BASE;
658  if (pts_src == PTS_SRC_WALLCLOCK)
659  pts = av_rescale_q(wallclock, timebase, time_base);
660  else
661  pts = av_rescale_q(abs_wallclock, timebase, time_base);
662  break;
663  }
664  }
665  if (res == S_OK)
666  pts = bmd_pts / time_base.num;
667 
668  if (!copyts) {
669  if (pts != AV_NOPTS_VALUE && *initial_pts == AV_NOPTS_VALUE)
670  *initial_pts = pts;
671  if (*initial_pts != AV_NOPTS_VALUE)
672  pts -= *initial_pts;
673  }
674 
675  return pts;
676 }
677 
678 static int get_bmd_timecode(AVFormatContext *avctx, AVTimecode *tc, AVRational frame_rate, BMDTimecodeFormat tc_format, IDeckLinkVideoInputFrame *videoFrame)
679 {
680  IDeckLinkTimecode *timecode;
681  int ret = AVERROR(ENOENT);
682 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
683  int hfr = (tc_format == bmdTimecodeRP188HighFrameRate);
684 #else
685  int hfr = 0;
686 #endif
687  if (videoFrame->GetTimecode(tc_format, &timecode) == S_OK) {
688  uint8_t hh, mm, ss, ff;
689  if (timecode->GetComponents(&hh, &mm, &ss, &ff) == S_OK) {
690  int flags = (timecode->GetFlags() & bmdTimecodeIsDropFrame) ? AV_TIMECODE_FLAG_DROPFRAME : 0;
691  if (!hfr && av_cmp_q(frame_rate, av_make_q(30, 1)) == 1)
692  ff = ff << 1 | !!(timecode->GetFlags() & bmdTimecodeFieldMark);
693  ret = av_timecode_init_from_components(tc, frame_rate, flags, hh, mm, ss, ff, avctx);
694  }
695  timecode->Release();
696  }
697  return ret;
698 }
699 
700 static int get_frame_timecode(AVFormatContext *avctx, decklink_ctx *ctx, AVTimecode *tc, IDeckLinkVideoInputFrame *videoFrame)
701 {
702  AVRational frame_rate = ctx->video_st->r_frame_rate;
703  int ret;
704  /* 50/60 fps content has alternating VITC1 and VITC2 timecode (see SMPTE ST
705  * 12-2, section 7), so the native ordering of RP188Any (HFR, VITC1, LTC,
706  * VITC2) would not work because LTC might not contain the field flag.
707  * Therefore we query the types manually. */
708  if (ctx->tc_format == bmdTimecodeRP188Any && av_cmp_q(frame_rate, av_make_q(30, 1)) == 1) {
709 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
710  ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188HighFrameRate, videoFrame);
711  if (ret == AVERROR(ENOENT))
712 #endif
713  ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188VITC1, videoFrame);
714  if (ret == AVERROR(ENOENT))
715  ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188VITC2, videoFrame);
716  if (ret == AVERROR(ENOENT))
717  ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188LTC, videoFrame);
718  } else {
719  ret = get_bmd_timecode(avctx, tc, frame_rate, ctx->tc_format, videoFrame);
720  }
721  return ret;
722 }
723 
725  IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)
726 {
727  void *frameBytes;
728  void *audioFrameBytes;
729  BMDTimeValue frameTime;
730  BMDTimeValue frameDuration;
731  int64_t wallclock = 0, abs_wallclock = 0;
732  struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
733 
734  if (ctx->autodetect) {
735  if (videoFrame && !(videoFrame->GetFlags() & bmdFrameHasNoInputSource) &&
736  ctx->bmd_mode == bmdModeUnknown)
737  {
739  }
740  return S_OK;
741  }
742 
743  // Drop the frames till system's timestamp aligns with the configured value.
744  if (0 == ctx->frameCount && cctx->timestamp_align) {
745  AVRational remainder = av_make_q(av_gettime() % cctx->timestamp_align, 1000000);
746  AVRational frame_duration = av_inv_q(ctx->video_st->r_frame_rate);
747  if (av_cmp_q(remainder, frame_duration) > 0) {
748  ++ctx->dropped;
749  return S_OK;
750  }
751  }
752 
753  ctx->frameCount++;
755  wallclock = av_gettime_relative();
757  abs_wallclock = av_gettime();
758 
759  // Handle Video Frame
760  if (videoFrame) {
761  AVPacket pkt = { 0 };
762  if (ctx->frameCount % 25 == 0) {
763  unsigned long long qsize = ff_decklink_packet_queue_size(&ctx->queue);
765  "Frame received (#%lu) - Valid (%liB) - QSize %fMB\n",
766  ctx->frameCount,
767  videoFrame->GetRowBytes() * videoFrame->GetHeight(),
768  (double)qsize / 1024 / 1024);
769  }
770 
771  videoFrame->GetBytes(&frameBytes);
772  videoFrame->GetStreamTime(&frameTime, &frameDuration,
774 
775  if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {
776  if (ctx->draw_bars && videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {
777  unsigned bars[8] = {
778  0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,
779  0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };
780  int width = videoFrame->GetWidth();
781  int height = videoFrame->GetHeight();
782  unsigned *p = (unsigned *)frameBytes;
783 
784  for (int y = 0; y < height; y++) {
785  for (int x = 0; x < width; x += 2)
786  *p++ = bars[(x * 8) / width];
787  }
788  }
789 
790  if (!no_video) {
791  av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected "
792  "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
793  }
794  no_video = 1;
795  } else {
796  if (no_video) {
797  av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned "
798  "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
799  }
800  no_video = 0;
801 
802  // Handle Timecode (if requested)
803  if (ctx->tc_format) {
804  AVTimecode tcr;
805  if (get_frame_timecode(avctx, ctx, &tcr, videoFrame) >= 0) {
806  char tcstr[AV_TIMECODE_STR_SIZE];
807  const char *tc = av_timecode_make_string(&tcr, tcstr, 0);
808  if (tc) {
809  AVDictionary* metadata_dict = NULL;
810  uint8_t* packed_metadata;
811 
812  if (av_cmp_q(ctx->video_st->r_frame_rate, av_make_q(60, 1)) < 1) {
813  uint32_t tc_data = av_timecode_get_smpte_from_framenum(&tcr, 0);
814  int size = sizeof(uint32_t) * 4;
815  uint32_t *sd = (uint32_t *)av_packet_new_side_data(&pkt, AV_PKT_DATA_S12M_TIMECODE, size);
816 
817  if (sd) {
818  *sd = 1; // one TC
819  *(sd + 1) = tc_data; // TC
820  }
821  }
822 
823  if (av_dict_set(&metadata_dict, "timecode", tc, 0) >= 0) {
824  size_t metadata_len;
825  packed_metadata = av_packet_pack_dictionary(metadata_dict, &metadata_len);
826  av_dict_free(&metadata_dict);
827  if (packed_metadata) {
828  if (av_packet_add_side_data(&pkt, AV_PKT_DATA_STRINGS_METADATA, packed_metadata, metadata_len) < 0)
829  av_freep(&packed_metadata);
830  else if (!ctx->tc_seen)
832  }
833  }
834  }
835  } else {
836  av_log(avctx, AV_LOG_DEBUG, "Unable to find timecode.\n");
837  }
838  }
839  }
840 
841  if (ctx->tc_format && cctx->wait_for_tc && !ctx->tc_seen) {
842 
843  av_log(avctx, AV_LOG_WARNING, "No TC detected yet. wait_for_tc set. Dropping. \n");
844  av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - "
845  "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
846  return S_OK;
847  }
848 
849  pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts, cctx->copyts);
850  pkt.dts = pkt.pts;
851 
852  pkt.duration = frameDuration;
853  //To be made sure it still applies
856  pkt.data = (uint8_t *)frameBytes;
857  pkt.size = videoFrame->GetRowBytes() *
858  videoFrame->GetHeight();
859  //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);
860 
861  if (!no_video) {
862  IDeckLinkVideoFrameAncillary *vanc;
863  AVPacket txt_pkt = { 0 };
864  uint8_t txt_buf0[3531]; // 35 * 46 bytes decoded teletext lines + 1 byte data_identifier + 1920 bytes OP47 decode buffer
865  uint8_t *txt_buf = txt_buf0;
866 
867  if (ctx->enable_klv) {
868  handle_klv(avctx, ctx, videoFrame, pkt.pts);
869  }
870 
871  if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
872  int i;
873  BMDPixelFormat vanc_format = vanc->GetPixelFormat();
874  txt_buf[0] = 0x10; // data_identifier - EBU_data
875  txt_buf++;
876 #if CONFIG_LIBZVBI
877  if (ctx->bmd_mode == bmdModePAL && ctx->teletext_lines &&
878  (vanc_format == bmdFormat8BitYUV || vanc_format == bmdFormat10BitYUV)) {
879  int64_t line_mask = 1;
880  av_assert0(videoFrame->GetWidth() == 720);
881  for (i = 6; i < 336; i++, line_mask <<= 1) {
882  uint8_t *buf;
883  if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
884  if (vanc_format == bmdFormat8BitYUV)
885  txt_buf = teletext_data_unit_from_vbi_data(i, buf, txt_buf, VBI_PIXFMT_UYVY);
886  else
887  txt_buf = teletext_data_unit_from_vbi_data_10bit(i, buf, txt_buf);
888  }
889  if (i == 22)
890  i = 317;
891  }
892  }
893 #endif
894  if (vanc_format == bmdFormat10BitYUV && videoFrame->GetWidth() <= MAX_WIDTH_VANC) {
895  int idx = get_vanc_line_idx(ctx->bmd_mode);
896  for (i = vanc_line_numbers[idx].vanc_start; i <= vanc_line_numbers[idx].vanc_end; i++) {
897  uint8_t *buf;
898  if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
899  uint16_t vanc[MAX_WIDTH_VANC];
900  size_t vanc_size = videoFrame->GetWidth();
901  if (ctx->bmd_mode == bmdModeNTSC && videoFrame->GetWidth() * 2 <= MAX_WIDTH_VANC) {
902  vanc_size = vanc_size * 2;
903  unpack_v210(vanc, buf, videoFrame->GetWidth());
904  } else {
905  extract_luma_from_v210(vanc, buf, videoFrame->GetWidth());
906  }
907  txt_buf = get_metadata(avctx, vanc, vanc_size,
908  txt_buf, sizeof(txt_buf0) - (txt_buf - txt_buf0), &pkt);
909  }
910  if (i == vanc_line_numbers[idx].field0_vanc_end)
912  }
913  }
914  vanc->Release();
915  if (txt_buf - txt_buf0 > 1) {
916  int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;
917  while (stuffing_units--) {
918  memset(txt_buf, 0xff, 46);
919  txt_buf[1] = 0x2c; // data_unit_length
920  txt_buf += 46;
921  }
922  txt_pkt.pts = pkt.pts;
923  txt_pkt.dts = pkt.dts;
924  txt_pkt.stream_index = ctx->teletext_st->index;
925  txt_pkt.data = txt_buf0;
926  txt_pkt.size = txt_buf - txt_buf0;
927  if (ff_decklink_packet_queue_put(&ctx->queue, &txt_pkt) < 0) {
928  ++ctx->dropped;
929  }
930  }
931  }
932  }
933 
935  if (pkt.buf)
936  videoFrame->AddRef();
937 
938  if (ff_decklink_packet_queue_put(&ctx->queue, &pkt) < 0) {
939  ++ctx->dropped;
940  }
941  }
942 
943  // Handle Audio Frame
944  if (audioFrame) {
945  AVPacket pkt = { 0 };
946  BMDTimeValue audio_pts;
947 
948  //hack among hacks
949  pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->ch_layout.nb_channels * (ctx->audio_depth / 8);
950  audioFrame->GetBytes(&audioFrameBytes);
951  audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);
952  pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts, cctx->copyts);
953  pkt.dts = pkt.pts;
954 
955  //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts);
958  pkt.data = (uint8_t *)audioFrameBytes;
959 
960  if (ff_decklink_packet_queue_put(&ctx->queue, &pkt) < 0) {
961  ++ctx->dropped;
962  }
963  }
964 
965  return S_OK;
966 }
967 
969  BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,
970  BMDDetectedVideoInputFormatFlags formatFlags)
971 {
972  struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
973  ctx->bmd_mode = mode->GetDisplayMode();
974  // check the C context member to make sure we set both raw_format and bmd_mode with data from the same format change callback
975  if (!cctx->raw_format)
976  ctx->raw_format = (formatFlags & bmdDetectedVideoInputRGB444) ? bmdFormat8BitARGB : bmdFormat8BitYUV;
977  return S_OK;
978 }
979 
980 static int decklink_autodetect(struct decklink_cctx *cctx) {
981  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
982  DECKLINK_BOOL autodetect_supported = false;
983  int i;
984 
985  if (ctx->attr->GetFlag(BMDDeckLinkSupportsInputFormatDetection, &autodetect_supported) != S_OK)
986  return -1;
987  if (autodetect_supported == false)
988  return -1;
989 
990  ctx->autodetect = 1;
991  ctx->bmd_mode = bmdModeUnknown;
992  if (ctx->dli->EnableVideoInput(AUTODETECT_DEFAULT_MODE,
993  bmdFormat8BitYUV,
994  bmdVideoInputEnableFormatDetection) != S_OK) {
995  return -1;
996  }
997 
998  if (ctx->dli->StartStreams() != S_OK) {
999  return -1;
1000  }
1001 
1002  // 3 second timeout
1003  for (i = 0; i < 30; i++) {
1004  av_usleep(100000);
1005  /* Sometimes VideoInputFrameArrived is called without the
1006  * bmdFrameHasNoInputSource flag before VideoInputFormatChanged.
1007  * So don't break for bmd_mode == AUTODETECT_DEFAULT_MODE. */
1008  if (ctx->bmd_mode != bmdModeUnknown &&
1009  ctx->bmd_mode != AUTODETECT_DEFAULT_MODE)
1010  break;
1011  }
1012 
1013  ctx->dli->PauseStreams();
1014  ctx->dli->FlushStreams();
1015  ctx->autodetect = 0;
1016  if (ctx->bmd_mode != bmdModeUnknown) {
1017  cctx->format_code = (char *)av_mallocz(5);
1018  if (!cctx->format_code)
1019  return -1;
1020  AV_WB32(cctx->format_code, ctx->bmd_mode);
1021  return 0;
1022  } else {
1023  return -1;
1024  }
1025 
1026 }
1027 
1028 extern "C" {
1029 
1031 {
1032  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1033  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
1034 
1035  if (ctx->dli) {
1036  ctx->dli->StopStreams();
1037  ctx->dli->DisableVideoInput();
1038  ctx->dli->DisableAudioInput();
1039  }
1040 
1041  ff_decklink_cleanup(avctx);
1043 
1044  av_freep(&cctx->ctx);
1045 
1046  return 0;
1047 }
1048 
1050 {
1051  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1052  struct decklink_ctx *ctx;
1053  class decklink_allocator *allocator;
1055  AVStream *st;
1056  HRESULT result;
1057  int ret;
1058 
1059  ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));
1060  if (!ctx)
1061  return AVERROR(ENOMEM);
1062  ctx->list_devices = cctx->list_devices;
1063  ctx->list_formats = cctx->list_formats;
1064  ctx->enable_klv = cctx->enable_klv;
1065  ctx->teletext_lines = cctx->teletext_lines;
1066  ctx->preroll = cctx->preroll;
1067  ctx->duplex_mode = cctx->duplex_mode;
1068  if (cctx->tc_format > 0 && (unsigned int)cctx->tc_format < FF_ARRAY_ELEMS(decklink_timecode_format_map))
1069  ctx->tc_format = decklink_timecode_format_map[cctx->tc_format];
1070  if (cctx->video_input > 0 && (unsigned int)cctx->video_input < FF_ARRAY_ELEMS(decklink_video_connection_map))
1071  ctx->video_input = decklink_video_connection_map[cctx->video_input];
1072  if (cctx->audio_input > 0 && (unsigned int)cctx->audio_input < FF_ARRAY_ELEMS(decklink_audio_connection_map))
1073  ctx->audio_input = decklink_audio_connection_map[cctx->audio_input];
1074  ctx->audio_pts_source = cctx->audio_pts_source;
1075  ctx->video_pts_source = cctx->video_pts_source;
1076  ctx->draw_bars = cctx->draw_bars;
1077  ctx->audio_depth = cctx->audio_depth;
1078  if (cctx->raw_format > 0 && (unsigned int)cctx->raw_format < FF_ARRAY_ELEMS(decklink_raw_format_map))
1079  ctx->raw_format = decklink_raw_format_map[cctx->raw_format];
1080  cctx->ctx = ctx;
1081 
1082  /* Check audio channel option for valid values: 2, 8 or 16 */
1083  switch (cctx->audio_channels) {
1084  case 2:
1085  case 8:
1086  case 16:
1087  break;
1088  default:
1089  av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n");
1090  return AVERROR(EINVAL);
1091  }
1092 
1093  /* Check audio bit depth option for valid values: 16 or 32 */
1094  switch (cctx->audio_depth) {
1095  case 16:
1096  case 32:
1097  break;
1098  default:
1099  av_log(avctx, AV_LOG_ERROR, "Value for audio bit depth option must be either 16 or 32\n");
1100  return AVERROR(EINVAL);
1101  }
1102 
1103  /* List available devices. */
1104  if (ctx->list_devices) {
1105  ff_decklink_list_devices_legacy(avctx, 1, 0);
1106  return AVERROR_EXIT;
1107  }
1108 
1109  ret = ff_decklink_init_device(avctx, avctx->url);
1110  if (ret < 0)
1111  return ret;
1112 
1113  /* Get input device. */
1114  if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) {
1115  av_log(avctx, AV_LOG_ERROR, "Could not open input device from '%s'\n",
1116  avctx->url);
1117  ret = AVERROR(EIO);
1118  goto error;
1119  }
1120 
1121  if (ff_decklink_set_configs(avctx, DIRECTION_IN) < 0) {
1122  av_log(avctx, AV_LOG_ERROR, "Could not set input configuration\n");
1123  ret = AVERROR(EIO);
1124  goto error;
1125  }
1126 
1127  /* List supported formats. */
1128  if (ctx->list_formats) {
1130  ret = AVERROR_EXIT;
1131  goto error;
1132  }
1133 
1135  ret = (ctx->dli->SetCallback(input_callback) == S_OK ? 0 : AVERROR_EXTERNAL);
1136  input_callback->Release();
1137  if (ret < 0) {
1138  av_log(avctx, AV_LOG_ERROR, "Cannot set input callback\n");
1139  goto error;
1140  }
1141 
1142  allocator = new decklink_allocator();
1143  ret = (ctx->dli->SetVideoInputFrameMemoryAllocator(allocator) == S_OK ? 0 : AVERROR_EXTERNAL);
1144  allocator->Release();
1145  if (ret < 0) {
1146  av_log(avctx, AV_LOG_ERROR, "Cannot set custom memory allocator\n");
1147  goto error;
1148  }
1149 
1150  if (!cctx->format_code) {
1151  if (decklink_autodetect(cctx) < 0) {
1152  av_log(avctx, AV_LOG_ERROR, "Cannot Autodetect input stream or No signal\n");
1153  ret = AVERROR(EIO);
1154  goto error;
1155  }
1156  av_log(avctx, AV_LOG_INFO, "Autodetected the input mode\n");
1157  }
1158  if (ctx->raw_format == (BMDPixelFormat)0)
1159  ctx->raw_format = bmdFormat8BitYUV;
1160  if (ff_decklink_set_format(avctx, DIRECTION_IN) < 0) {
1161  av_log(avctx, AV_LOG_ERROR, "Could not set format code %s for %s\n",
1162  cctx->format_code ? cctx->format_code : "(unset)", avctx->url);
1163  ret = AVERROR(EIO);
1164  goto error;
1165  }
1166 
1167 #if !CONFIG_LIBZVBI
1168  if (ctx->teletext_lines && ctx->bmd_mode == bmdModePAL) {
1169  av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing SD PAL teletext, please recompile FFmpeg.\n");
1170  ret = AVERROR(ENOSYS);
1171  goto error;
1172  }
1173 #endif
1174 
1175  /* Setup streams. */
1176  st = avformat_new_stream(avctx, NULL);
1177  if (!st) {
1178  av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1179  ret = AVERROR(ENOMEM);
1180  goto error;
1181  }
1182  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1183  st->codecpar->codec_id = cctx->audio_depth == 32 ? AV_CODEC_ID_PCM_S32LE : AV_CODEC_ID_PCM_S16LE;
1184  st->codecpar->sample_rate = bmdAudioSampleRate48kHz;
1185  st->codecpar->ch_layout.nb_channels = cctx->audio_channels;
1186  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1187  ctx->audio_st=st;
1188 
1189  st = avformat_new_stream(avctx, NULL);
1190  if (!st) {
1191  av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1192  ret = AVERROR(ENOMEM);
1193  goto error;
1194  }
1195  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1196  st->codecpar->width = ctx->bmd_width;
1197  st->codecpar->height = ctx->bmd_height;
1198 
1199  st->time_base.den = ctx->bmd_tb_den;
1200  st->time_base.num = ctx->bmd_tb_num;
1201  st->r_frame_rate = av_make_q(st->time_base.den, st->time_base.num);
1202 
1203  switch(ctx->raw_format) {
1204  case bmdFormat8BitYUV:
1205  st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1206  st->codecpar->format = AV_PIX_FMT_UYVY422;
1207  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 16, st->time_base.den, st->time_base.num);
1208  break;
1209  case bmdFormat10BitYUV:
1210  st->codecpar->codec_id = AV_CODEC_ID_V210;
1211  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 64, st->time_base.den, st->time_base.num * 3);
1212  break;
1213  case bmdFormat8BitARGB:
1214  st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1215  st->codecpar->format = AV_PIX_FMT_0RGB;
1216  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
1217  break;
1218  case bmdFormat8BitBGRA:
1219  st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1220  st->codecpar->format = AV_PIX_FMT_BGR0;
1221  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
1222  break;
1223  case bmdFormat10BitRGB:
1224  st->codecpar->codec_id = AV_CODEC_ID_R210;
1225  st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 30, st->time_base.den, st->time_base.num);
1226  break;
1227  default:
1228  char fourcc_str[AV_FOURCC_MAX_STRING_SIZE] = {0};
1229  av_fourcc_make_string(fourcc_str, ctx->raw_format);
1230  av_log(avctx, AV_LOG_ERROR, "Raw Format %s not supported\n", fourcc_str);
1231  ret = AVERROR(EINVAL);
1232  goto error;
1233  }
1234 
1235  switch (ctx->bmd_field_dominance) {
1236  case bmdUpperFieldFirst:
1237  st->codecpar->field_order = AV_FIELD_TT;
1238  break;
1239  case bmdLowerFieldFirst:
1240  st->codecpar->field_order = AV_FIELD_BB;
1241  break;
1242  case bmdProgressiveFrame:
1243  case bmdProgressiveSegmentedFrame:
1244  st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
1245  break;
1246  }
1247 
1248  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1249 
1250  ctx->video_st=st;
1251 
1252  if (ctx->enable_klv) {
1253  st = avformat_new_stream(avctx, NULL);
1254  if (!st) {
1255  ret = AVERROR(ENOMEM);
1256  goto error;
1257  }
1258  st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
1259  st->time_base.den = ctx->bmd_tb_den;
1260  st->time_base.num = ctx->bmd_tb_num;
1261  st->codecpar->codec_id = AV_CODEC_ID_SMPTE_KLV;
1262  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1263  ctx->klv_st = st;
1264  }
1265 
1266  if (ctx->teletext_lines) {
1267  st = avformat_new_stream(avctx, NULL);
1268  if (!st) {
1269  av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1270  ret = AVERROR(ENOMEM);
1271  goto error;
1272  }
1273  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1274  st->time_base.den = ctx->bmd_tb_den;
1275  st->time_base.num = ctx->bmd_tb_num;
1276  st->codecpar->codec_id = AV_CODEC_ID_DVB_TELETEXT;
1277  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1278  ctx->teletext_st = st;
1279  }
1280 
1281  av_log(avctx, AV_LOG_VERBOSE, "Using %d input audio channels\n", ctx->audio_st->codecpar->ch_layout.nb_channels);
1282  result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, cctx->audio_depth == 32 ? bmdAudioSampleType32bitInteger : bmdAudioSampleType16bitInteger, ctx->audio_st->codecpar->ch_layout.nb_channels);
1283 
1284  if (result != S_OK) {
1285  av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n");
1286  ret = AVERROR(EIO);
1287  goto error;
1288  }
1289 
1290  result = ctx->dli->EnableVideoInput(ctx->bmd_mode,
1291  ctx->raw_format,
1292  bmdVideoInputFlagDefault);
1293 
1294  if (result != S_OK) {
1295  av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n");
1296  ret = AVERROR(EIO);
1297  goto error;
1298  }
1299 
1300  ff_decklink_packet_queue_init(avctx, &ctx->queue, cctx->queue_size);
1301 
1302  if (ctx->dli->StartStreams() != S_OK) {
1303  av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n");
1304  ret = AVERROR(EIO);
1305  goto error;
1306  }
1307 
1308  return 0;
1309 
1310 error:
1311  ff_decklink_cleanup(avctx);
1312  return ret;
1313 }
1314 
1316 {
1317  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1318  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
1319 
1320  ff_decklink_packet_queue_get(&ctx->queue, pkt, 1);
1321 
1322  if (ctx->tc_format && !(av_dict_get(ctx->video_st->metadata, "timecode", NULL, 0))) {
1323  size_t size;
1324  const uint8_t *side_metadata = av_packet_get_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA, &size);
1325  if (side_metadata) {
1326  if (av_packet_unpack_dictionary(side_metadata, size, &ctx->video_st->metadata) < 0)
1327  av_log(avctx, AV_LOG_ERROR, "Unable to set timecode\n");
1328  }
1329  }
1330 
1331  return 0;
1332 }
1333 
1335 {
1336  return ff_decklink_list_devices(avctx, device_list, 1, 0);
1337 }
1338 
1339 } /* extern "C" */
error
static void error(const char *err)
Definition: target_bsf_fuzzer.c:32
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:328
VANCLineNumber::vanc_end
int vanc_end
Definition: decklink_dec.cpp:67
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
av_gettime_relative
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AV_TIMECODE_STR_SIZE
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
AV_FIELD_PROGRESSIVE
@ AV_FIELD_PROGRESSIVE
Definition: defs.h:201
AV_CODEC_ID_RAWVIDEO
@ AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:65
AVPacket::data
uint8_t * data
Definition: packet.h:520
AV_CODEC_ID_DVB_TELETEXT
@ AV_CODEC_ID_DVB_TELETEXT
Definition: codec_id.h:557
ff_reverse
const uint8_t ff_reverse[256]
Definition: reverse.c:23
data
const char data[16]
Definition: mxf.c:148
AV_PKT_DATA_S12M_TIMECODE
@ AV_PKT_DATA_S12M_TIMECODE
Timecode which conforms to SMPTE ST 12-1:2014.
Definition: packet.h:288
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:538
reverse.h
mathematics.h
AVDictionary
Definition: dict.c:34
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:321
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:575
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
AV_FIELD_TT
@ AV_FIELD_TT
Top coded_first, top displayed first.
Definition: defs.h:202
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:853
av_packet_add_side_data
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: packet.c:197
AV_FOURCC_MAX_STRING_SIZE
#define AV_FOURCC_MAX_STRING_SIZE
Definition: avutil.h:343
timecode.h
AV_CODEC_ID_R210
@ AV_CODEC_ID_R210
Definition: codec_id.h:185
av_timecode_make_string
char * av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum)
Load timecode string in buf.
Definition: timecode.c:103
pts
static int64_t pts
Definition: transcode_aac.c:644
ss
#define ss(width, name, subs,...)
Definition: cbs_vp9.c:202
AVRational::num
int num
Numerator.
Definition: rational.h:59
avassert.h
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1490
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
mask
static const uint16_t mask[17]
Definition: lzw.c:38
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:62
width
#define width
intreadwrite.h
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
av_parity
#define av_parity
Definition: common.h:160
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ctx
AVFormatContext * ctx
Definition: movenc.c:49
av_rescale_q
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
av_usleep
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:84
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:503
result
and forward the result(frame or status change) to the corresponding input. If nothing is possible
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:782
NULL
#define NULL
Definition: coverity.c:32
VANCLineNumber::field1_vanc_start
int field1_vanc_start
Definition: decklink_dec.cpp:66
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
list
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining list
Definition: filter_design.txt:25
VANCLineNumber::field0_vanc_end
int field0_vanc_end
Definition: decklink_dec.cpp:65
AV_PIX_FMT_BGR0
@ AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:265
time.h
AV_CODEC_ID_SMPTE_KLV
@ AV_CODEC_ID_SMPTE_KLV
Definition: codec_id.h:587
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
av_buffer_create
AVBufferRef * av_buffer_create(uint8_t *data, size_t size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:55
AV_WB32
#define AV_WB32(p, v)
Definition: intreadwrite.h:415
av_timecode_init_from_components
int av_timecode_init_from_components(AVTimecode *tc, AVRational rate, int flags, int hh, int mm, int ss, int ff, void *log_ctx)
Init a timecode struct from the passed timecode components.
Definition: timecode.c:231
AVPacket::size
int size
Definition: packet.h:521
dc
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled top and top right vectors is used as motion vector prediction the used motion vector is the sum of the predictor and(mvx_diff, mvy_diff) *mv_scale Intra DC Prediction block[y][x] dc[1]
Definition: snow.txt:400
shift
static int shift(int a, int b)
Definition: bonk.c:261
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1371
size
int size
Definition: twinvq_data.h:10344
av_make_q
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
av_fourcc_make_string
char * av_fourcc_make_string(char *buf, uint32_t fourcc)
Fill the provided buffer with a string containing a FourCC (four-character code) representation.
Definition: utils.c:73
AV_CODEC_ID_V210
@ AV_CODEC_ID_V210
Definition: codec_id.h:179
avdevice.h
av_packet_unpack_dictionary
int av_packet_unpack_dictionary(const uint8_t *data, size_t size, AVDictionary **dict)
Unpack a dictionary from side_data.
Definition: packet.c:347
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:519
height
#define height
VANCLineNumber::mode
BMDDisplayMode mode
Definition: decklink_dec.cpp:63
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:59
line
Definition: graph2dot.c:48
av_packet_pack_dictionary
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, size_t *size)
Pack a dictionary for use in side_data.
Definition: packet.c:312
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:526
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:223
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
AV_PKT_DATA_STRINGS_METADATA
@ AV_PKT_DATA_STRINGS_METADATA
A list of zero terminated key/value strings.
Definition: packet.h:169
av_timecode_get_smpte_from_framenum
uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum)
Convert frame number to SMPTE 12M binary representation.
Definition: timecode.c:53
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:513
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, size_t *size)
Get side information from packet.
Definition: packet.c:252
VANCLineNumber
Definition: decklink_dec.cpp:62
internal.h
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
AV_FIELD_BB
@ AV_FIELD_BB
Bottom coded first, bottom displayed first.
Definition: defs.h:203
common.h
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:256
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
len
int len
Definition: vorbis_enc_data.h:426
av_rescale
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
av_cmp_q
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
AV_TIMECODE_FLAG_DROPFRAME
@ AV_TIMECODE_FLAG_DROPFRAME
timecode is drop frame
Definition: timecode.h:36
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
KLVPacket
Definition: mxf.h:74
AVDeviceInfoList
List of devices.
Definition: avdevice.h:343
avformat.h
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
AV_PIX_FMT_UYVY422
@ AV_PIX_FMT_UYVY422
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:88
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:749
input_callback
static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
Definition: mmaldec.c:209
av_packet_new_side_data
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, size_t size)
Allocate new information of a packet.
Definition: packet.c:231
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
AVRational::den
int den
Denominator.
Definition: rational.h:60
mode
mode
Definition: ebur128.h:83
AVStream::r_frame_rate
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:909
AVPacket::stream_index
int stream_index
Definition: packet.h:522
av_gettime
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_ID_PCM_S32LE
@ AV_CODEC_ID_PCM_S32LE
Definition: codec_id.h:336
avutil.h
AV_PKT_DATA_A53_CC
@ AV_PKT_DATA_A53_CC
ATSC A53 Part 4 Closed Captions.
Definition: packet.h:239
packet_internal.h
it
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s it
Definition: writing_filters.txt:31
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVPacket
This structure stores compressed data.
Definition: packet.h:497
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:88
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
VANCLineNumber::vanc_start
int vanc_start
Definition: decklink_dec.cpp:64
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
AV_PIX_FMT_0RGB
@ AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:262
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_EXIT
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:58
AVTimecode
Definition: timecode.h:41
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1283
line
The official guide to swscale for confused that consecutive non overlapping rectangles of slice_bottom special converter These generally are unscaled converters of common like for each output line the vertical scaler pulls lines from a ring buffer When the ring buffer does not contain the wanted line
Definition: swscale.txt:40