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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 int decklink_get_attr_string(IDeckLink *dl, BMDDeckLinkAttributeID cfg_id, const char **s)
81 {
83  HRESULT hr;
84  IDeckLinkAttributes *attr;
85  *s = NULL;
86  if (dl->QueryInterface(IID_IDeckLinkAttributes, (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 (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
153  duplex_supported = false;
154 
155  if (duplex_supported) {
156  res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
157  if (res != S_OK)
158  av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");
159  else
160  av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");
161  } else {
162  av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");
163  }
164  }
165  if (direction == DIRECTION_IN) {
166  int ret;
167  ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
168  if (ret < 0)
169  return ret;
170  ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
171  if (ret < 0)
172  return ret;
173  }
174  return 0;
175 }
176 
178  int width, int height,
179  int tb_num, int tb_den,
180  enum AVFieldOrder field_order,
181  decklink_direction_t direction, int num)
182 {
183  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
184  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
185  BMDDisplayModeSupport support;
186  IDeckLinkDisplayModeIterator *itermode;
187  IDeckLinkDisplayMode *mode;
188  int i = 1;
189  HRESULT res;
190 
191  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",
192  width, height, tb_num, tb_den, field_order, direction, num, (cctx->format_code) ? cctx->format_code : "(unset)");
193 
194  if (direction == DIRECTION_IN) {
195  res = ctx->dli->GetDisplayModeIterator (&itermode);
196  } else {
197  res = ctx->dlo->GetDisplayModeIterator (&itermode);
198  }
199 
200  if (res!= S_OK) {
201  av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
202  return AVERROR(EIO);
203  }
204 
205  char format_buf[] = " ";
206  if (cctx->format_code)
207  memcpy(format_buf, cctx->format_code, FFMIN(strlen(cctx->format_code), sizeof(format_buf)));
208  BMDDisplayMode target_mode = (BMDDisplayMode)AV_RB32(format_buf);
209  AVRational target_tb = av_make_q(tb_num, tb_den);
210  ctx->bmd_mode = bmdModeUnknown;
211  while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
212  BMDTimeValue bmd_tb_num, bmd_tb_den;
213  int bmd_width = mode->GetWidth();
214  int bmd_height = mode->GetHeight();
215  BMDDisplayMode bmd_mode = mode->GetDisplayMode();
216  BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();
217 
218  mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
219  AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);
220 
221  if ((bmd_width == width &&
222  bmd_height == height &&
223  !av_cmp_q(mode_tb, target_tb) &&
224  field_order_eq(field_order, bmd_field_dominance))
225  || i == num
226  || target_mode == bmd_mode) {
227  ctx->bmd_mode = bmd_mode;
228  ctx->bmd_width = bmd_width;
229  ctx->bmd_height = bmd_height;
230  ctx->bmd_tb_den = bmd_tb_den;
231  ctx->bmd_tb_num = bmd_tb_num;
232  ctx->bmd_field_dominance = bmd_field_dominance;
233  av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
234  bmd_width, bmd_height, 1/av_q2d(mode_tb),
235  (ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
236  }
237 
238  mode->Release();
239  i++;
240  }
241 
242  itermode->Release();
243 
244  if (ctx->bmd_mode == bmdModeUnknown)
245  return -1;
246  if (direction == DIRECTION_IN) {
247  if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,
248  bmdVideoOutputFlagDefault,
249  &support, NULL) != S_OK)
250  return -1;
251  } else {
252  if (!ctx->supports_vanc || ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
253  bmdVideoOutputVANC,
254  &support, NULL) != S_OK) {
255  /* Try without VANC enabled */
256  if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
257  bmdVideoOutputFlagDefault,
258  &support, NULL) != S_OK) {
259  return -1;
260  }
261  ctx->supports_vanc = 0;
262  }
263 
264  }
265  if (support == bmdDisplayModeSupported)
266  return 0;
267 
268  return -1;
269 }
270 
272  return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction, num);
273 }
274 
276  struct AVDeviceInfoList *device_list,
277  int show_inputs, int show_outputs)
278 {
279  IDeckLink *dl = NULL;
280  IDeckLinkIterator *iter = decklink_create_iterator(avctx);
281  int ret = 0;
282 
283  if (!iter)
284  return AVERROR(EIO);
285 
286  while (ret == 0 && iter->Next(&dl) == S_OK) {
287  IDeckLinkOutput *output_config;
288  IDeckLinkInput *input_config;
289  const char *display_name = NULL;
290  const char *unique_name = NULL;
291  AVDeviceInfo *new_device = NULL;
292  int add = 0;
293 
294  ret = decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
295  if (ret < 0)
296  goto next;
297  ret = decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
298  if (ret < 0)
299  goto next;
300 
301  if (show_outputs) {
302  if (dl->QueryInterface(IID_IDeckLinkOutput, (void **)&output_config) == S_OK) {
303  output_config->Release();
304  add = 1;
305  }
306  }
307 
308  if (show_inputs) {
309  if (dl->QueryInterface(IID_IDeckLinkInput, (void **)&input_config) == S_OK) {
310  input_config->Release();
311  add = 1;
312  }
313  }
314 
315  if (add == 1) {
316  new_device = (AVDeviceInfo *) av_mallocz(sizeof(AVDeviceInfo));
317  if (!new_device) {
318  ret = AVERROR(ENOMEM);
319  goto next;
320  }
321 
322  new_device->device_name = av_strdup(unique_name ? unique_name : display_name);
323  new_device->device_description = av_strdup(display_name);
324 
325  if (!new_device->device_name ||
326  !new_device->device_description ||
327  av_dynarray_add_nofree(&device_list->devices, &device_list->nb_devices, new_device) < 0) {
328  ret = AVERROR(ENOMEM);
329  av_freep(&new_device->device_name);
330  av_freep(&new_device->device_description);
331  av_freep(&new_device);
332  goto next;
333  }
334  }
335 
336  next:
337  av_freep(&display_name);
338  av_freep(&unique_name);
339  dl->Release();
340  }
341  iter->Release();
342  return ret;
343 }
344 
345 /* This is a wrapper around the ff_decklink_list_devices() which dumps the
346  output to av_log() and exits (for backward compatibility with the
347  "-list_devices" argument). */
349  int show_inputs, int show_outputs)
350 {
351  struct AVDeviceInfoList *device_list = NULL;
352  int ret;
353 
354  device_list = (struct AVDeviceInfoList *) av_mallocz(sizeof(AVDeviceInfoList));
355  if (!device_list)
356  return;
357 
358  ret = ff_decklink_list_devices(avctx, device_list, show_inputs, show_outputs);
359  if (ret == 0) {
360  av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink %s devices:\n",
361  show_inputs ? "input" : "output");
362  for (int i = 0; i < device_list->nb_devices; i++) {
363  av_log(avctx, AV_LOG_INFO, "\t'%s'\n", device_list->devices[i]->device_description);
364  }
365  }
366  avdevice_free_list_devices(&device_list);
367 }
368 
370 {
371  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
372  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
373  IDeckLinkDisplayModeIterator *itermode;
374  IDeckLinkDisplayMode *mode;
375  uint32_t format_code;
376  HRESULT res;
377 
378  if (direction == DIRECTION_IN) {
379  int ret;
380  ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
381  if (ret < 0)
382  return ret;
383  ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
384  if (ret < 0)
385  return ret;
386  res = ctx->dli->GetDisplayModeIterator (&itermode);
387  } else {
388  res = ctx->dlo->GetDisplayModeIterator (&itermode);
389  }
390 
391  if (res!= S_OK) {
392  av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
393  return AVERROR(EIO);
394  }
395 
396  av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tformat_code\tdescription",
397  avctx->url);
398  while (itermode->Next(&mode) == S_OK) {
399  BMDTimeValue tb_num, tb_den;
400  mode->GetFrameRate(&tb_num, &tb_den);
401  format_code = av_bswap32(mode->GetDisplayMode());
402  av_log(avctx, AV_LOG_INFO, "\n\t%.4s\t\t%ldx%ld at %d/%d fps",
403  (char*) &format_code, mode->GetWidth(), mode->GetHeight(),
404  (int) tb_den, (int) tb_num);
405  switch (mode->GetFieldDominance()) {
406  case bmdLowerFieldFirst:
407  av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
408  case bmdUpperFieldFirst:
409  av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
410  }
411  mode->Release();
412  }
413  av_log(avctx, AV_LOG_INFO, "\n");
414 
415  itermode->Release();
416 
417  return 0;
418 }
419 
421 {
422  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
423  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
424 
425  if (ctx->dli)
426  ctx->dli->Release();
427  if (ctx->dlo)
428  ctx->dlo->Release();
429  if (ctx->attr)
430  ctx->attr->Release();
431  if (ctx->cfg)
432  ctx->cfg->Release();
433  if (ctx->dl)
434  ctx->dl->Release();
435 }
436 
438 {
439  struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
440  struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
441  IDeckLink *dl = NULL;
442  IDeckLinkIterator *iter = decklink_create_iterator(avctx);
443  if (!iter)
444  return AVERROR_EXTERNAL;
445 
446  while (iter->Next(&dl) == S_OK) {
447  const char *display_name = NULL;
448  const char *unique_name = NULL;
449  decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
450  decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
451  if (display_name && !strcmp(name, display_name) || unique_name && !strcmp(name, unique_name)) {
452  av_free((void *)unique_name);
453  av_free((void *)display_name);
454  ctx->dl = dl;
455  break;
456  }
457  av_free((void *)display_name);
458  av_free((void *)unique_name);
459  dl->Release();
460  }
461  iter->Release();
462  if (!ctx->dl)
463  return AVERROR(ENXIO);
464 
465  if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
466  av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
467  ff_decklink_cleanup(avctx);
468  return AVERROR_EXTERNAL;
469  }
470 
471  if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
472  av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
473  ff_decklink_cleanup(avctx);
474  return AVERROR_EXTERNAL;
475  }
476 
477  return 0;
478 }
#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
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
Format I/O context.
Definition: avformat.h:1351
void avdevice_free_list_devices(AVDeviceInfoList **device_list)
Convenient function to free result of avdevice_list_devices().
Definition: avdevice.c:250
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
#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 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:1447
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
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:1510
byte swapping routines
List of devices.
Definition: avdevice.h:460
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:1379
#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'ed).
Definition: ebur128.h:83
const char * name
Definition: opengl_enc.c:103
static uint8_t tmp[11]
Definition: aes_ctr.c:26