FFmpeg  4.2.1
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 
77  return iter;
78 }
79 
80 static int decklink_get_attr_string(IDeckLink *dl, BMDDeckLinkAttributeID cfg_id, const char **s)
81 {
83  HRESULT hr;
85  *s = NULL;
86  if (dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&attr) != S_OK)
87  return AVERROR_EXTERNAL;
88  hr = attr->GetString(cfg_id, &tmp);
89  attr->Release();
90  if (hr == S_OK) {
91  *s = DECKLINK_STRDUP(tmp);
92  DECKLINK_FREE(tmp);
93  if (!*s)
94  return AVERROR(ENOMEM);
95  } else if (hr == E_FAIL) {
96  return AVERROR_EXTERNAL;
97  }
98  return 0;
99 }
100 
101 static int decklink_select_input(AVFormatContext *avctx, BMDDeckLinkConfigurationID cfg_id)
102 {
103  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
104  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
105  BMDDeckLinkAttributeID attr_id = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? BMDDeckLinkAudioInputConnections : BMDDeckLinkVideoInputConnections;
106  int64_t bmd_input = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? (int64_t)ctx->audio_input : (int64_t)ctx->video_input;
107  const char *type_name = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? "audio" : "video";
108  int64_t supported_connections = 0;
109  HRESULT res;
110 
111  if (bmd_input) {
112  res = ctx->attr->GetInt(attr_id, &supported_connections);
113  if (res != S_OK) {
114  av_log(avctx, AV_LOG_ERROR, "Failed to query supported %s inputs.\n", type_name);
115  return AVERROR_EXTERNAL;
116  }
117  if ((supported_connections & bmd_input) != bmd_input) {
118  av_log(avctx, AV_LOG_ERROR, "Device does not support selected %s input.\n", type_name);
119  return AVERROR(ENOSYS);
120  }
121  res = ctx->cfg->SetInt(cfg_id, bmd_input);
122  if (res != S_OK) {
123  av_log(avctx, AV_LOG_ERROR, "Failed to select %s input.\n", type_name);
124  return AVERROR_EXTERNAL;
125  }
126  }
127  return 0;
128 }
129 
130 static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order)
131 {
132  if (field_order == AV_FIELD_UNKNOWN)
133  return true;
134  if ((field_order == AV_FIELD_TT || field_order == AV_FIELD_TB) && bmd_field_order == bmdUpperFieldFirst)
135  return true;
136  if ((field_order == AV_FIELD_BB || field_order == AV_FIELD_BT) && bmd_field_order == bmdLowerFieldFirst)
137  return true;
138  if (field_order == AV_FIELD_PROGRESSIVE && (bmd_field_order == bmdProgressiveFrame || bmd_field_order == bmdProgressiveSegmentedFrame))
139  return true;
140  return false;
141 }
142 
144  decklink_direction_t direction) {
145  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
146  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
147  HRESULT res;
148 
149  if (ctx->duplex_mode) {
150  DECKLINK_BOOL duplex_supported = false;
151 
152 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
153  IDeckLinkProfileManager *manager = NULL;
154  if (ctx->dl->QueryInterface(IID_IDeckLinkProfileManager, (void **)&manager) == S_OK)
155  duplex_supported = true;
156 #else
157  if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
158  duplex_supported = false;
159 #endif
160 
161  if (duplex_supported) {
162 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
163  IDeckLinkProfile *profile = NULL;
164  BMDProfileID bmd_profile_id = ctx->duplex_mode == 2 ? bmdProfileOneSubDeviceFullDuplex : bmdProfileTwoSubDevicesHalfDuplex;
165  res = manager->GetProfile(bmd_profile_id, &profile);
166  if (res == S_OK) {
167  res = profile->SetActive();
168  profile->Release();
169  }
170  manager->Release();
171 #else
172  res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
173 #endif
174  if (res != S_OK)
175  av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");
176  else
177  av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");
178  } else {
179  av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");
180  }
181  }
182  if (direction == DIRECTION_IN) {
183  int ret;
184  ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
185  if (ret < 0)
186  return ret;
187  ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
188  if (ret < 0)
189  return ret;
190  }
191  if (direction == DIRECTION_OUT && cctx->timing_offset != INT_MIN) {
192  res = ctx->cfg->SetInt(bmdDeckLinkConfigReferenceInputTimingOffset, cctx->timing_offset);
193  if (res != S_OK)
194  av_log(avctx, AV_LOG_WARNING, "Setting timing offset failed.\n");
195  }
196  return 0;
197 }
198 
200  int width, int height,
201  int tb_num, int tb_den,
202  enum AVFieldOrder field_order,
203  decklink_direction_t direction, int num)
204 {
205  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
206  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
207 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
208  DECKLINK_BOOL support;
209 #else
210  BMDDisplayModeSupport support;
211 #endif
212  IDeckLinkDisplayModeIterator *itermode;
213  IDeckLinkDisplayMode *mode;
214  int i = 1;
215  HRESULT res;
216 
217  av_log(avctx, AV_LOG_DEBUG, "Trying to find mode for frame size %dx%d, frame timing %d/%d, field order %d, direction %d, mode number %d, format code %s\n",
218  width, height, tb_num, tb_den, field_order, direction, num, (cctx->format_code) ? cctx->format_code : "(unset)");
219 
220  if (direction == DIRECTION_IN) {
221  res = ctx->dli->GetDisplayModeIterator (&itermode);
222  } else {
223  res = ctx->dlo->GetDisplayModeIterator (&itermode);
224  }
225 
226  if (res!= S_OK) {
227  av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
228  return AVERROR(EIO);
229  }
230 
231  char format_buf[] = " ";
232  if (cctx->format_code)
233  memcpy(format_buf, cctx->format_code, FFMIN(strlen(cctx->format_code), sizeof(format_buf)));
234  BMDDisplayMode target_mode = (BMDDisplayMode)AV_RB32(format_buf);
235  AVRational target_tb = av_make_q(tb_num, tb_den);
236  ctx->bmd_mode = bmdModeUnknown;
237  while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
238  BMDTimeValue bmd_tb_num, bmd_tb_den;
239  int bmd_width = mode->GetWidth();
240  int bmd_height = mode->GetHeight();
241  BMDDisplayMode bmd_mode = mode->GetDisplayMode();
242  BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();
243 
244  mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
245  AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);
246 
247  if ((bmd_width == width &&
248  bmd_height == height &&
249  !av_cmp_q(mode_tb, target_tb) &&
250  field_order_eq(field_order, bmd_field_dominance))
251  || i == num
252  || target_mode == bmd_mode) {
253  ctx->bmd_mode = bmd_mode;
254  ctx->bmd_width = bmd_width;
255  ctx->bmd_height = bmd_height;
256  ctx->bmd_tb_den = bmd_tb_den;
257  ctx->bmd_tb_num = bmd_tb_num;
258  ctx->bmd_field_dominance = bmd_field_dominance;
259  av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
260  bmd_width, bmd_height, 1/av_q2d(mode_tb),
261  (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
262  }
263 
264  mode->Release();
265  i++;
266  }
267 
268  itermode->Release();
269 
270  if (ctx->bmd_mode == bmdModeUnknown)
271  return -1;
272 
273 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
274  if (direction == DIRECTION_IN) {
275  if (ctx->dli->DoesSupportVideoMode(ctx->video_input, ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,
276  bmdSupportedVideoModeDefault,
277  &support) != S_OK)
278  return -1;
279  } else {
280  BMDDisplayMode actualMode = ctx->bmd_mode;
281  if (ctx->dlo->DoesSupportVideoMode(bmdVideoConnectionUnspecified, ctx->bmd_mode, ctx->raw_format,
282  bmdSupportedVideoModeDefault,
283  &actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode) {
284  return -1;
285  }
286 
287  }
288  if (support)
289  return 0;
290 #else
291  if (direction == DIRECTION_IN) {
292  if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,
293  bmdVideoOutputFlagDefault,
294  &support, NULL) != S_OK)
295  return -1;
296  } else {
297  if (!ctx->supports_vanc || ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
298  bmdVideoOutputVANC,
299  &support, NULL) != S_OK || support != bmdDisplayModeSupported) {
300  /* Try without VANC enabled */
301  if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
302  bmdVideoOutputFlagDefault,
303  &support, NULL) != S_OK) {
304  return -1;
305  }
306  ctx->supports_vanc = 0;
307  }
308 
309  }
310  if (support == bmdDisplayModeSupported)
311  return 0;
312 #endif
313 
314  return -1;
315 }
316 
318  return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction, num);
319 }
320 
322  struct AVDeviceInfoList *device_list,
323  int show_inputs, int show_outputs)
324 {
325  IDeckLink *dl = NULL;
326  IDeckLinkIterator *iter = decklink_create_iterator(avctx);
327  int ret = 0;
328 
329  if (!iter)
330  return AVERROR(EIO);
331 
332  while (ret == 0 && iter->Next(&dl) == S_OK) {
333  IDeckLinkOutput *output_config;
334  IDeckLinkInput *input_config;
335  const char *display_name = NULL;
336  const char *unique_name = NULL;
337  AVDeviceInfo *new_device = NULL;
338  int add = 0;
339 
340  ret = decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
341  if (ret < 0)
342  goto next;
343  ret = decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
344  if (ret < 0)
345  goto next;
346 
347  if (show_outputs) {
348  if (dl->QueryInterface(IID_IDeckLinkOutput, (void **)&output_config) == S_OK) {
349  output_config->Release();
350  add = 1;
351  }
352  }
353 
354  if (show_inputs) {
355  if (dl->QueryInterface(IID_IDeckLinkInput, (void **)&input_config) == S_OK) {
356  input_config->Release();
357  add = 1;
358  }
359  }
360 
361  if (add == 1) {
362  new_device = (AVDeviceInfo *) av_mallocz(sizeof(AVDeviceInfo));
363  if (!new_device) {
364  ret = AVERROR(ENOMEM);
365  goto next;
366  }
367 
368  new_device->device_name = av_strdup(unique_name ? unique_name : display_name);
369  new_device->device_description = av_strdup(display_name);
370 
371  if (!new_device->device_name ||
372  !new_device->device_description ||
373  av_dynarray_add_nofree(&device_list->devices, &device_list->nb_devices, new_device) < 0) {
374  ret = AVERROR(ENOMEM);
375  av_freep(&new_device->device_name);
376  av_freep(&new_device->device_description);
377  av_freep(&new_device);
378  goto next;
379  }
380  }
381 
382  next:
383  av_freep(&display_name);
384  av_freep(&unique_name);
385  dl->Release();
386  }
387  iter->Release();
388  return ret;
389 }
390 
391 /* This is a wrapper around the ff_decklink_list_devices() which dumps the
392  output to av_log() and exits (for backward compatibility with the
393  "-list_devices" argument). */
395  int show_inputs, int show_outputs)
396 {
397  struct AVDeviceInfoList *device_list = NULL;
398  int ret;
399 
400  device_list = (struct AVDeviceInfoList *) av_mallocz(sizeof(AVDeviceInfoList));
401  if (!device_list)
402  return;
403 
404  ret = ff_decklink_list_devices(avctx, device_list, show_inputs, show_outputs);
405  if (ret == 0) {
406  av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink %s devices:\n",
407  show_inputs ? "input" : "output");
408  for (int i = 0; i < device_list->nb_devices; i++) {
409  av_log(avctx, AV_LOG_INFO, "\t'%s'\n", device_list->devices[i]->device_description);
410  }
411  }
412  avdevice_free_list_devices(&device_list);
413 }
414 
416 {
417  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
418  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
419  IDeckLinkDisplayModeIterator *itermode;
420  IDeckLinkDisplayMode *mode;
421  uint32_t format_code;
422  HRESULT res;
423 
424  if (direction == DIRECTION_IN) {
425  int ret;
426  ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
427  if (ret < 0)
428  return ret;
429  ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
430  if (ret < 0)
431  return ret;
432  res = ctx->dli->GetDisplayModeIterator (&itermode);
433  } else {
434  res = ctx->dlo->GetDisplayModeIterator (&itermode);
435  }
436 
437  if (res!= S_OK) {
438  av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
439  return AVERROR(EIO);
440  }
441 
442  av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tformat_code\tdescription",
443  avctx->url);
444  while (itermode->Next(&mode) == S_OK) {
445  BMDTimeValue tb_num, tb_den;
446  mode->GetFrameRate(&tb_num, &tb_den);
447  format_code = av_bswap32(mode->GetDisplayMode());
448  av_log(avctx, AV_LOG_INFO, "\n\t%.4s\t\t%ldx%ld at %d/%d fps",
449  (char*) &format_code, mode->GetWidth(), mode->GetHeight(),
450  (int) tb_den, (int) tb_num);
451  switch (mode->GetFieldDominance()) {
452  case bmdLowerFieldFirst:
453  av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
454  case bmdUpperFieldFirst:
455  av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
456  }
457  mode->Release();
458  }
459  av_log(avctx, AV_LOG_INFO, "\n");
460 
461  itermode->Release();
462 
463  return 0;
464 }
465 
467 {
468  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
469  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
470 
471  if (ctx->dli)
472  ctx->dli->Release();
473  if (ctx->dlo)
474  ctx->dlo->Release();
475  if (ctx->attr)
476  ctx->attr->Release();
477  if (ctx->cfg)
478  ctx->cfg->Release();
479  if (ctx->dl)
480  ctx->dl->Release();
481 }
482 
484 {
485  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
486  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
487  IDeckLink *dl = NULL;
488  IDeckLinkIterator *iter = decklink_create_iterator(avctx);
489  if (!iter)
490  return AVERROR_EXTERNAL;
491 
492  while (iter->Next(&dl) == S_OK) {
493  const char *display_name = NULL;
494  const char *unique_name = NULL;
495  decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
496  decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
497  if (display_name && !strcmp(name, display_name) || unique_name && !strcmp(name, unique_name)) {
498  av_free((void *)unique_name);
499  av_free((void *)display_name);
500  ctx->dl = dl;
501  break;
502  }
503  av_free((void *)display_name);
504  av_free((void *)unique_name);
505  dl->Release();
506  }
507  iter->Release();
508  if (!ctx->dl)
509  return AVERROR(ENXIO);
510 
511  if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
512  av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
513  ff_decklink_cleanup(avctx);
514  return AVERROR_EXTERNAL;
515  }
516 
517  if (ctx->dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&ctx->attr) != S_OK) {
518  av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
519  ff_decklink_cleanup(avctx);
520  return AVERROR_EXTERNAL;
521  }
522 
523  return 0;
524 }
const char * name
Definition: avisynth_c.h:867
#define NULL
Definition: coverity.c:32
Structure describes basic parameters of the device.
Definition: avdevice.h:452
#define S_OK
Definition: windows2linux.h:40
char * device_description
human friendly name
Definition: avdevice.h:454
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
char * device_name
device name, format depends on device
Definition: avdevice.h:453
Format I/O context.
Definition: avformat.h:1358
void avdevice_free_list_devices(AVDeviceInfoList **device_list)
Convenient function to free result of avdevice_list_devices().
Definition: avdevice.c:250
#define AV_RB32
Definition: intreadwrite.h:130
#define height
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:294
#define av_log(a,...)
Main libavdevice API header.
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
char * url
input or output URL.
Definition: avformat.h:1454
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
AVDeviceInfo ** devices
list of autodetected devices
Definition: avdevice.h:461
#define FFMIN(a, b)
Definition: common.h:96
#define width
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define E_FAIL
Definition: windows2linux.h:44
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define av_bswap32
Definition: bswap.h:33
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVFieldOrder
Definition: avcodec.h:1543
byte swapping routines
List of devices.
Definition: avdevice.h:460
mfxU16 profile
Definition: qsvenc.c:44
DWORD HRESULT
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
Main libavformat public API header.
int
#define av_free(p)
void * priv_data
Format private data.
Definition: avformat.h:1386
#define av_freep(p)
int nb_devices
number of autodetected devices
Definition: avdevice.h:462
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
static uint8_t tmp[11]
Definition: aes_ctr.c:26