FFmpeg  4.4.6
decklink_common.cpp
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1 /*
2  * Blackmagic DeckLink output
3  * Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /* Include internal.h first to avoid conflict between winsock.h (used by
23  * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
24 extern "C" {
25 #include "libavformat/internal.h"
26 }
27 
28 #include <DeckLinkAPI.h>
29 #ifdef _WIN32
30 #include <DeckLinkAPI_i.c>
31 #else
32 /* The file provided by the SDK is known to be missing prototypes, which doesn't
33  cause issues with GCC since the warning doesn't apply to C++ files. However
34  Clang does complain (and warnings are treated as errors), so suppress the
35  warning just for this one file */
36 #ifdef __clang__
37 #pragma clang diagnostic push
38 #pragma clang diagnostic ignored "-Wmissing-prototypes"
39 #endif
40 #include <DeckLinkAPIDispatch.cpp>
41 #ifdef __clang__
42 #pragma clang diagnostic pop
43 #endif
44 #endif
45 
46 extern "C" {
47 #include "libavformat/avformat.h"
48 #include "libavutil/imgutils.h"
49 #include "libavutil/intreadwrite.h"
50 #include "libavutil/bswap.h"
51 #include "avdevice.h"
52 }
53 
54 #include "decklink_common.h"
55 
56 static IDeckLinkIterator *decklink_create_iterator(AVFormatContext *avctx)
57 {
58  IDeckLinkIterator *iter;
59 
60 #ifdef _WIN32
61  if (CoInitialize(NULL) < 0) {
62  av_log(avctx, AV_LOG_ERROR, "COM initialization failed.\n");
63  return NULL;
64  }
65 
66  if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,
67  IID_IDeckLinkIterator, (void**) &iter) != S_OK) {
68  iter = NULL;
69  }
70 #else
71  iter = CreateDeckLinkIteratorInstance();
72 #endif
73  if (!iter) {
74  av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator. "
75  "Make sure you have DeckLink drivers " BLACKMAGIC_DECKLINK_API_VERSION_STRING " or newer installed.\n");
76  } else {
77  IDeckLinkAPIInformation *api;
79 #ifdef _WIN32
80  if (CoCreateInstance(CLSID_CDeckLinkAPIInformation, NULL, CLSCTX_ALL,
81  IID_IDeckLinkAPIInformation, (void**) &api) != S_OK) {
82  api = NULL;
83  }
84 #else
85  api = CreateDeckLinkAPIInformationInstance();
86 #endif
87  if (api && api->GetInt(BMDDeckLinkAPIVersion, &version) == S_OK) {
88  if (version < BLACKMAGIC_DECKLINK_API_VERSION)
89  av_log(avctx, AV_LOG_WARNING, "Installed DeckLink drivers are too old and may be incompatible with the SDK this module was built against. "
90  "Make sure you have DeckLink drivers " BLACKMAGIC_DECKLINK_API_VERSION_STRING " or newer installed.\n");
91  } else {
92  av_log(avctx, AV_LOG_ERROR, "Failed to check installed DeckLink API version.\n");
93  }
94  if (api)
95  api->Release();
96  }
97 
98  return iter;
99 }
100 
101 static int decklink_get_attr_string(IDeckLink *dl, BMDDeckLinkAttributeID cfg_id, const char **s)
102 {
104  HRESULT hr;
106  *s = NULL;
107  if (dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&attr) != S_OK)
108  return AVERROR_EXTERNAL;
109  hr = attr->GetString(cfg_id, &tmp);
110  attr->Release();
111  if (hr == S_OK) {
112  *s = DECKLINK_STRDUP(tmp);
114  if (!*s)
115  return AVERROR(ENOMEM);
116  } else if (hr == E_FAIL) {
117  return AVERROR_EXTERNAL;
118  }
119  return 0;
120 }
121 
122 static int decklink_select_input(AVFormatContext *avctx, BMDDeckLinkConfigurationID cfg_id)
123 {
124  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
125  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
126  BMDDeckLinkAttributeID attr_id = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? BMDDeckLinkAudioInputConnections : BMDDeckLinkVideoInputConnections;
127  int64_t bmd_input = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? (int64_t)ctx->audio_input : (int64_t)ctx->video_input;
128  const char *type_name = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? "audio" : "video";
129  int64_t supported_connections = 0;
130  HRESULT res;
131 
132  if (bmd_input) {
133  res = ctx->attr->GetInt(attr_id, &supported_connections);
134  if (res != S_OK) {
135  av_log(avctx, AV_LOG_ERROR, "Failed to query supported %s inputs.\n", type_name);
136  return AVERROR_EXTERNAL;
137  }
138  if ((supported_connections & bmd_input) != bmd_input) {
139  av_log(avctx, AV_LOG_ERROR, "Device does not support selected %s input.\n", type_name);
140  return AVERROR(ENOSYS);
141  }
142  res = ctx->cfg->SetInt(cfg_id, bmd_input);
143  if (res != S_OK) {
144  av_log(avctx, AV_LOG_ERROR, "Failed to select %s input.\n", type_name);
145  return AVERROR_EXTERNAL;
146  }
147  }
148  return 0;
149 }
150 
151 static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order)
152 {
153  if (field_order == AV_FIELD_UNKNOWN)
154  return true;
155  if ((field_order == AV_FIELD_TT || field_order == AV_FIELD_TB) && bmd_field_order == bmdUpperFieldFirst)
156  return true;
157  if ((field_order == AV_FIELD_BB || field_order == AV_FIELD_BT) && bmd_field_order == bmdLowerFieldFirst)
158  return true;
159  if (field_order == AV_FIELD_PROGRESSIVE && (bmd_field_order == bmdProgressiveFrame || bmd_field_order == bmdProgressiveSegmentedFrame))
160  return true;
161  return false;
162 }
163 
165  decklink_direction_t direction) {
166  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
167  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
168  HRESULT res;
169 
170  if (ctx->duplex_mode) {
171  DECKLINK_BOOL duplex_supported = false;
172 
173 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
174  IDeckLinkProfileManager *manager = NULL;
175  if (ctx->dl->QueryInterface(IID_IDeckLinkProfileManager, (void **)&manager) == S_OK)
176  duplex_supported = true;
177 #else
178  if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
179  duplex_supported = false;
180 #endif
181 
182  if (duplex_supported) {
183 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
184  IDeckLinkProfile *profile = NULL;
185  BMDProfileID bmd_profile_id = ctx->duplex_mode == 2 ? bmdProfileOneSubDeviceFullDuplex : bmdProfileTwoSubDevicesHalfDuplex;
186  res = manager->GetProfile(bmd_profile_id, &profile);
187  if (res == S_OK) {
188  res = profile->SetActive();
189  profile->Release();
190  }
191  manager->Release();
192 #else
193  res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
194 #endif
195  if (res != S_OK)
196  av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");
197  else
198  av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");
199  } else {
200  av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");
201  }
202  }
203  if (direction == DIRECTION_IN) {
204  int ret;
205  ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
206  if (ret < 0)
207  return ret;
208  ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
209  if (ret < 0)
210  return ret;
211  }
212  if (direction == DIRECTION_OUT && cctx->timing_offset != INT_MIN) {
213  res = ctx->cfg->SetInt(bmdDeckLinkConfigReferenceInputTimingOffset, cctx->timing_offset);
214  if (res != S_OK)
215  av_log(avctx, AV_LOG_WARNING, "Setting timing offset failed.\n");
216  }
217  return 0;
218 }
219 
221  int width, int height,
222  int tb_num, int tb_den,
223  enum AVFieldOrder field_order,
224  decklink_direction_t direction)
225 {
226  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
227  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
228 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
229  DECKLINK_BOOL support;
230 #else
231  BMDDisplayModeSupport support;
232 #endif
233  IDeckLinkDisplayModeIterator *itermode;
234  IDeckLinkDisplayMode *mode;
235  int i = 1;
236  HRESULT res;
237 
238  av_log(avctx, AV_LOG_DEBUG, "Trying to find mode for frame size %dx%d, frame timing %d/%d, field order %d, direction %d, format code %s\n",
239  width, height, tb_num, tb_den, field_order, direction, cctx->format_code ? cctx->format_code : "(unset)");
240 
241  if (direction == DIRECTION_IN) {
242  res = ctx->dli->GetDisplayModeIterator (&itermode);
243  } else {
244  res = ctx->dlo->GetDisplayModeIterator (&itermode);
245  }
246 
247  if (res!= S_OK) {
248  av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
249  return AVERROR(EIO);
250  }
251 
252  char format_buf[] = " ";
253  if (cctx->format_code)
254  memcpy(format_buf, cctx->format_code, FFMIN(strlen(cctx->format_code), sizeof(format_buf)));
255  BMDDisplayMode target_mode = (BMDDisplayMode)AV_RB32(format_buf);
256  AVRational target_tb = av_make_q(tb_num, tb_den);
257  ctx->bmd_mode = bmdModeUnknown;
258  while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
259  BMDTimeValue bmd_tb_num, bmd_tb_den;
260  int bmd_width = mode->GetWidth();
261  int bmd_height = mode->GetHeight();
262  BMDDisplayMode bmd_mode = mode->GetDisplayMode();
263  BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();
264 
265  mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
266  AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);
267 
268  if ((bmd_width == width &&
269  bmd_height == height &&
270  !av_cmp_q(mode_tb, target_tb) &&
271  field_order_eq(field_order, bmd_field_dominance))
272  || target_mode == bmd_mode) {
273  ctx->bmd_mode = bmd_mode;
274  ctx->bmd_width = bmd_width;
275  ctx->bmd_height = bmd_height;
276  ctx->bmd_tb_den = bmd_tb_den;
277  ctx->bmd_tb_num = bmd_tb_num;
278  ctx->bmd_field_dominance = bmd_field_dominance;
279  av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
280  bmd_width, bmd_height, 1/av_q2d(mode_tb),
281  (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
282  }
283 
284  mode->Release();
285  i++;
286  }
287 
288  itermode->Release();
289 
290  if (ctx->bmd_mode == bmdModeUnknown)
291  return -1;
292 
293 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b050000
294  if (direction == DIRECTION_IN) {
295  BMDDisplayMode actualMode = ctx->bmd_mode;
296  if (ctx->dli->DoesSupportVideoMode(ctx->video_input, ctx->bmd_mode, ctx->raw_format,
297  bmdNoVideoInputConversion, bmdSupportedVideoModeDefault,
298  &actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode)
299  return -1;
300  } else {
301  BMDDisplayMode actualMode = ctx->bmd_mode;
302  if (ctx->dlo->DoesSupportVideoMode(bmdVideoConnectionUnspecified, ctx->bmd_mode, ctx->raw_format,
303  bmdNoVideoOutputConversion, bmdSupportedVideoModeDefault,
304  &actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode)
305  return -1;
306  }
307  return 0;
308 #elif BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
309  if (direction == DIRECTION_IN) {
310  if (ctx->dli->DoesSupportVideoMode(ctx->video_input, ctx->bmd_mode, ctx->raw_format,
311  bmdSupportedVideoModeDefault,
312  &support) != S_OK)
313  return -1;
314  } else {
315  BMDDisplayMode actualMode = ctx->bmd_mode;
316  if (ctx->dlo->DoesSupportVideoMode(bmdVideoConnectionUnspecified, ctx->bmd_mode, ctx->raw_format,
317  bmdSupportedVideoModeDefault,
318  &actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode) {
319  return -1;
320  }
321 
322  }
323  if (support)
324  return 0;
325 #else
326  if (direction == DIRECTION_IN) {
327  if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
328  bmdVideoOutputFlagDefault,
329  &support, NULL) != S_OK)
330  return -1;
331  } else {
332  if (!ctx->supports_vanc || ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
333  bmdVideoOutputVANC,
334  &support, NULL) != S_OK || support != bmdDisplayModeSupported) {
335  /* Try without VANC enabled */
336  if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
337  bmdVideoOutputFlagDefault,
338  &support, NULL) != S_OK) {
339  return -1;
340  }
341  ctx->supports_vanc = 0;
342  }
343 
344  }
345  if (support == bmdDisplayModeSupported)
346  return 0;
347 #endif
348 
349  return -1;
350 }
351 
353  return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction);
354 }
355 
357  struct AVDeviceInfoList *device_list,
358  int show_inputs, int show_outputs)
359 {
360  IDeckLink *dl = NULL;
361  IDeckLinkIterator *iter = decklink_create_iterator(avctx);
362  int ret = 0;
363 
364  if (!iter)
365  return AVERROR(EIO);
366 
367  while (ret == 0 && iter->Next(&dl) == S_OK) {
368  IDeckLinkOutput *output_config;
369  IDeckLinkInput *input_config;
370  const char *display_name = NULL;
371  const char *unique_name = NULL;
372  AVDeviceInfo *new_device = NULL;
373  int add = 0;
374 
375  ret = decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
376  if (ret < 0)
377  goto next;
378  ret = decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
379  if (ret < 0)
380  goto next;
381 
382  if (show_outputs) {
383  if (dl->QueryInterface(IID_IDeckLinkOutput, (void **)&output_config) == S_OK) {
384  output_config->Release();
385  add = 1;
386  }
387  }
388 
389  if (show_inputs) {
390  if (dl->QueryInterface(IID_IDeckLinkInput, (void **)&input_config) == S_OK) {
391  input_config->Release();
392  add = 1;
393  }
394  }
395 
396  if (add == 1) {
397  new_device = (AVDeviceInfo *) av_mallocz(sizeof(AVDeviceInfo));
398  if (!new_device) {
399  ret = AVERROR(ENOMEM);
400  goto next;
401  }
402 
403  new_device->device_name = av_strdup(unique_name ? unique_name : display_name);
404  new_device->device_description = av_strdup(display_name);
405 
406  if (!new_device->device_name ||
407  !new_device->device_description ||
408  av_dynarray_add_nofree(&device_list->devices, &device_list->nb_devices, new_device) < 0) {
409  ret = AVERROR(ENOMEM);
410  av_freep(&new_device->device_name);
411  av_freep(&new_device->device_description);
412  av_freep(&new_device);
413  goto next;
414  }
415  }
416 
417  next:
418  av_freep(&display_name);
419  av_freep(&unique_name);
420  dl->Release();
421  }
422  iter->Release();
423  return ret;
424 }
425 
426 /* This is a wrapper around the ff_decklink_list_devices() which dumps the
427  output to av_log() and exits (for backward compatibility with the
428  "-list_devices" argument). */
430  int show_inputs, int show_outputs)
431 {
432  struct AVDeviceInfoList *device_list = NULL;
433  int ret;
434 
435  device_list = (struct AVDeviceInfoList *) av_mallocz(sizeof(AVDeviceInfoList));
436  if (!device_list)
437  return;
438 
439  ret = ff_decklink_list_devices(avctx, device_list, show_inputs, show_outputs);
440  if (ret == 0) {
441  av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink %s devices:\n",
442  show_inputs ? "input" : "output");
443  for (int i = 0; i < device_list->nb_devices; i++) {
444  av_log(avctx, AV_LOG_INFO, "\t'%s'\n", device_list->devices[i]->device_description);
445  }
446  }
447  avdevice_free_list_devices(&device_list);
448 }
449 
451 {
452  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
453  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
454  IDeckLinkDisplayModeIterator *itermode;
455  IDeckLinkDisplayMode *mode;
456  uint32_t format_code;
457  HRESULT res;
458 
459  if (direction == DIRECTION_IN) {
460  int ret;
461  ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
462  if (ret < 0)
463  return ret;
464  ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
465  if (ret < 0)
466  return ret;
467  res = ctx->dli->GetDisplayModeIterator (&itermode);
468  } else {
469  res = ctx->dlo->GetDisplayModeIterator (&itermode);
470  }
471 
472  if (res!= S_OK) {
473  av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
474  return AVERROR(EIO);
475  }
476 
477  av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tformat_code\tdescription",
478  avctx->url);
479  while (itermode->Next(&mode) == S_OK) {
480  BMDTimeValue tb_num, tb_den;
481  mode->GetFrameRate(&tb_num, &tb_den);
482  format_code = av_bswap32(mode->GetDisplayMode());
483  av_log(avctx, AV_LOG_INFO, "\n\t%.4s\t\t%ldx%ld at %d/%d fps",
484  (char*) &format_code, mode->GetWidth(), mode->GetHeight(),
485  (int) tb_den, (int) tb_num);
486  switch (mode->GetFieldDominance()) {
487  case bmdLowerFieldFirst:
488  av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
489  case bmdUpperFieldFirst:
490  av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
491  }
492  mode->Release();
493  }
494  av_log(avctx, AV_LOG_INFO, "\n");
495 
496  itermode->Release();
497 
498  return 0;
499 }
500 
502 {
503  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
504  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
505 
506  if (ctx->dli)
507  ctx->dli->Release();
508  if (ctx->dlo)
509  ctx->dlo->Release();
510  if (ctx->attr)
511  ctx->attr->Release();
512  if (ctx->cfg)
513  ctx->cfg->Release();
514  if (ctx->dl)
515  ctx->dl->Release();
516 }
517 
519 {
520  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
521  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
522  IDeckLink *dl = NULL;
523  IDeckLinkIterator *iter = decklink_create_iterator(avctx);
524  if (!iter)
525  return AVERROR_EXTERNAL;
526 
527  while (iter->Next(&dl) == S_OK) {
528  const char *display_name = NULL;
529  const char *unique_name = NULL;
530  decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
531  decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
532  if (display_name && !strcmp(name, display_name) || unique_name && !strcmp(name, unique_name)) {
533  av_free((void *)unique_name);
534  av_free((void *)display_name);
535  ctx->dl = dl;
536  break;
537  }
538  av_free((void *)display_name);
539  av_free((void *)unique_name);
540  dl->Release();
541  }
542  iter->Release();
543  if (!ctx->dl)
544  return AVERROR(ENXIO);
545 
546  if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
547  av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
548  ff_decklink_cleanup(avctx);
549  return AVERROR_EXTERNAL;
550  }
551 
552  if (ctx->dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&ctx->attr) != S_OK) {
553  av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
554  ff_decklink_cleanup(avctx);
555  return AVERROR_EXTERNAL;
556  }
557 
558  return 0;
559 }
Main libavdevice API header.
Main libavformat public API header.
#define AV_RB32
Definition: intreadwrite.h:130
#define av_bswap32
Definition: bswap.h:33
byte swapping routines
#define s(width, name)
Definition: cbs_vp9.c:257
AVFieldOrder
Definition: codec_par.h:36
@ AV_FIELD_TT
Definition: codec_par.h:39
@ AV_FIELD_BB
Definition: codec_par.h:40
@ AV_FIELD_UNKNOWN
Definition: codec_par.h:37
@ AV_FIELD_PROGRESSIVE
Definition: codec_par.h:38
@ AV_FIELD_BT
Definition: codec_par.h:42
@ AV_FIELD_TB
Definition: codec_par.h:41
#define FFMIN(a, b)
Definition: common.h:105
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
static float add(float src0, float src1)
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
void avdevice_free_list_devices(AVDeviceInfoList **device_list)
Convenient function to free result of avdevice_list_devices().
Definition: avdevice.c:145
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:296
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
misc image utilities
int i
Definition: input.c:407
version
Definition: libkvazaar.c:326
const char * name
Definition: qsvenc.c:46
mfxU16 profile
Definition: qsvenc.c:45
List of devices.
Definition: avdevice.h:465
int nb_devices
number of autodetected devices
Definition: avdevice.h:467
AVDeviceInfo ** devices
list of autodetected devices
Definition: avdevice.h:466
Structure describes basic parameters of the device.
Definition: avdevice.h:457
char * device_description
human friendly name
Definition: avdevice.h:459
char * device_name
device name, format depends on device
Definition: avdevice.h:458
Format I/O context.
Definition: avformat.h:1232
char * url
input or output URL.
Definition: avformat.h:1328
void * priv_data
Format private data.
Definition: avformat.h:1260
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define av_free(p)
#define av_freep(p)
#define av_log(a,...)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
AVFormatContext * ctx
Definition: movenc.c:48
#define height
#define width