1 /*
2 * Blackmagic DeckLink output
3 * Copyright (c) 2013-2014 Ramiro Polla
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 <atomic>
23 using std::atomic;
24
25 /* Include internal.h first to avoid conflict between winsock.h (used by
26 * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
27 extern "C" {
28 #include "libavformat/internal.h"
29 }
30
31 #include <DeckLinkAPI.h>
32
33 extern "C" {
34 #include "libavformat/avformat.h"
35 #include "libavutil/imgutils.h"
36 #include "avdevice.h"
37 }
38
39 #include "decklink_common.h"
40 #include "decklink_enc.h"
41 #if CONFIG_LIBKLVANC
42 #include "libklvanc/vanc.h"
43 #include "libklvanc/vanc-lines.h"
44 #include "libklvanc/pixels.h"
45 #endif
46
47 /* DeckLink callback class declaration */
48 class decklink_frame : public IDeckLinkVideoFrame
49 {
50 public:
decklink_frame(struct decklink_ctx * ctx,AVFrame * avframe,AVCodecID codec_id,int height,int width)51 decklink_frame(struct decklink_ctx *ctx, AVFrame *avframe, AVCodecID codec_id, int height, int width) :
52 _ctx(ctx), _avframe(avframe), _avpacket(NULL), _codec_id(codec_id), _ancillary(NULL), _height(height), _width(width), _refs(1) { }
decklink_frame(struct decklink_ctx * ctx,AVPacket * avpacket,AVCodecID codec_id,int height,int width)53 decklink_frame(struct decklink_ctx *ctx, AVPacket *avpacket, AVCodecID codec_id, int height, int width) :
54 _ctx(ctx), _avframe(NULL), _avpacket(avpacket), _codec_id(codec_id), _ancillary(NULL), _height(height), _width(width), _refs(1) { }
GetWidth(void)55 virtual long STDMETHODCALLTYPE GetWidth (void) { return _width; }
GetHeight(void)56 virtual long STDMETHODCALLTYPE GetHeight (void) { return _height; }
GetRowBytes(void)57 virtual long STDMETHODCALLTYPE GetRowBytes (void)
58 {
59 if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME)
60 return _avframe->linesize[0] < 0 ? -_avframe->linesize[0] : _avframe->linesize[0];
61 else
62 return ((GetWidth() + 47) / 48) * 128;
63 }
GetPixelFormat(void)64 virtual BMDPixelFormat STDMETHODCALLTYPE GetPixelFormat(void)
65 {
66 if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME)
67 return bmdFormat8BitYUV;
68 else
69 return bmdFormat10BitYUV;
70 }
GetFlags(void)71 virtual BMDFrameFlags STDMETHODCALLTYPE GetFlags (void)
72 {
73 if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME)
74 return _avframe->linesize[0] < 0 ? bmdFrameFlagFlipVertical : bmdFrameFlagDefault;
75 else
76 return bmdFrameFlagDefault;
77 }
78
GetBytes(void ** buffer)79 virtual HRESULT STDMETHODCALLTYPE GetBytes (void **buffer)
80 {
81 if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) {
82 if (_avframe->linesize[0] < 0)
83 *buffer = (void *)(_avframe->data[0] + _avframe->linesize[0] * (_avframe->height - 1));
84 else
85 *buffer = (void *)(_avframe->data[0]);
86 } else {
87 *buffer = (void *)(_avpacket->data);
88 }
89 return S_OK;
90 }
91
GetTimecode(BMDTimecodeFormat format,IDeckLinkTimecode ** timecode)92 virtual HRESULT STDMETHODCALLTYPE GetTimecode (BMDTimecodeFormat format, IDeckLinkTimecode **timecode) { return S_FALSE; }
GetAncillaryData(IDeckLinkVideoFrameAncillary ** ancillary)93 virtual HRESULT STDMETHODCALLTYPE GetAncillaryData(IDeckLinkVideoFrameAncillary **ancillary)
94 {
95 *ancillary = _ancillary;
96 if (_ancillary) {
97 _ancillary->AddRef();
98 return S_OK;
99 } else {
100 return S_FALSE;
101 }
102 }
SetAncillaryData(IDeckLinkVideoFrameAncillary * ancillary)103 virtual HRESULT STDMETHODCALLTYPE SetAncillaryData(IDeckLinkVideoFrameAncillary *ancillary)
104 {
105 if (_ancillary)
106 _ancillary->Release();
107 _ancillary = ancillary;
108 _ancillary->AddRef();
109 return S_OK;
110 }
QueryInterface(REFIID iid,LPVOID * ppv)111 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
AddRef(void)112 virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; }
Release(void)113 virtual ULONG STDMETHODCALLTYPE Release(void)
114 {
115 int ret = --_refs;
116 if (!ret) {
117 av_frame_free(&_avframe);
118 av_packet_free(&_avpacket);
119 if (_ancillary)
120 _ancillary->Release();
121 delete this;
122 }
123 return ret;
124 }
125
126 struct decklink_ctx *_ctx;
127 AVFrame *_avframe;
128 AVPacket *_avpacket;
129 AVCodecID _codec_id;
130 IDeckLinkVideoFrameAncillary *_ancillary;
131 int _height;
132 int _width;
133
134 private:
135 std::atomic<int> _refs;
136 };
137
138 class decklink_output_callback : public IDeckLinkVideoOutputCallback
139 {
140 public:
ScheduledFrameCompleted(IDeckLinkVideoFrame * _frame,BMDOutputFrameCompletionResult result)141 virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted(IDeckLinkVideoFrame *_frame, BMDOutputFrameCompletionResult result)
142 {
143 decklink_frame *frame = static_cast<decklink_frame *>(_frame);
144 struct decklink_ctx *ctx = frame->_ctx;
145
146 if (frame->_avframe)
147 av_frame_unref(frame->_avframe);
148 if (frame->_avpacket)
149 av_packet_unref(frame->_avpacket);
150
151 pthread_mutex_lock(&ctx->mutex);
152 ctx->frames_buffer_available_spots++;
153 pthread_cond_broadcast(&ctx->cond);
154 pthread_mutex_unlock(&ctx->mutex);
155
156 return S_OK;
157 }
ScheduledPlaybackHasStopped(void)158 virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped(void) { return S_OK; }
QueryInterface(REFIID iid,LPVOID * ppv)159 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
AddRef(void)160 virtual ULONG STDMETHODCALLTYPE AddRef(void) { return 1; }
Release(void)161 virtual ULONG STDMETHODCALLTYPE Release(void) { return 1; }
162 };
163
decklink_setup_video(AVFormatContext * avctx,AVStream * st)164 static int decklink_setup_video(AVFormatContext *avctx, AVStream *st)
165 {
166 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
167 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
168 AVCodecParameters *c = st->codecpar;
169
170 if (ctx->video) {
171 av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n");
172 return -1;
173 }
174
175 if (c->codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) {
176 if (c->format != AV_PIX_FMT_UYVY422) {
177 av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!"
178 " Only AV_PIX_FMT_UYVY422 is supported.\n");
179 return -1;
180 }
181 ctx->raw_format = bmdFormat8BitYUV;
182 } else if (c->codec_id != AV_CODEC_ID_V210) {
183 av_log(avctx, AV_LOG_ERROR, "Unsupported codec type!"
184 " Only V210 and wrapped frame with AV_PIX_FMT_UYVY422 are supported.\n");
185 return -1;
186 } else {
187 ctx->raw_format = bmdFormat10BitYUV;
188 }
189
190 if (ff_decklink_set_configs(avctx, DIRECTION_OUT) < 0) {
191 av_log(avctx, AV_LOG_ERROR, "Could not set output configuration\n");
192 return -1;
193 }
194 if (ff_decklink_set_format(avctx, c->width, c->height,
195 st->time_base.num, st->time_base.den, c->field_order)) {
196 av_log(avctx, AV_LOG_ERROR, "Unsupported video size, framerate or field order!"
197 " Check available formats with -list_formats 1.\n");
198 return -1;
199 }
200 if (ctx->supports_vanc && ctx->dlo->EnableVideoOutput(ctx->bmd_mode, bmdVideoOutputVANC) != S_OK) {
201 av_log(avctx, AV_LOG_WARNING, "Could not enable video output with VANC! Trying without...\n");
202 ctx->supports_vanc = 0;
203 }
204 if (!ctx->supports_vanc && ctx->dlo->EnableVideoOutput(ctx->bmd_mode, bmdVideoOutputFlagDefault) != S_OK) {
205 av_log(avctx, AV_LOG_ERROR, "Could not enable video output!\n");
206 return -1;
207 }
208
209 /* Set callback. */
210 ctx->output_callback = new decklink_output_callback();
211 ctx->dlo->SetScheduledFrameCompletionCallback(ctx->output_callback);
212
213 ctx->frames_preroll = st->time_base.den * ctx->preroll;
214 if (st->time_base.den > 1000)
215 ctx->frames_preroll /= 1000;
216
217 /* Buffer twice as many frames as the preroll. */
218 ctx->frames_buffer = ctx->frames_preroll * 2;
219 ctx->frames_buffer = FFMIN(ctx->frames_buffer, 60);
220 pthread_mutex_init(&ctx->mutex, NULL);
221 pthread_cond_init(&ctx->cond, NULL);
222 ctx->frames_buffer_available_spots = ctx->frames_buffer;
223
224 av_log(avctx, AV_LOG_DEBUG, "output: %s, preroll: %d, frames buffer size: %d\n",
225 avctx->url, ctx->frames_preroll, ctx->frames_buffer);
226
227 /* The device expects the framerate to be fixed. */
228 avpriv_set_pts_info(st, 64, st->time_base.num, st->time_base.den);
229
230 ctx->video = 1;
231
232 return 0;
233 }
234
decklink_setup_audio(AVFormatContext * avctx,AVStream * st)235 static int decklink_setup_audio(AVFormatContext *avctx, AVStream *st)
236 {
237 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
238 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
239 AVCodecParameters *c = st->codecpar;
240
241 if (ctx->audio) {
242 av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n");
243 return -1;
244 }
245 if (c->sample_rate != 48000) {
246 av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate!"
247 " Only 48kHz is supported.\n");
248 return -1;
249 }
250 if (c->channels != 2 && c->channels != 8 && c->channels != 16) {
251 av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels!"
252 " Only 2, 8 or 16 channels are supported.\n");
253 return -1;
254 }
255 if (ctx->dlo->EnableAudioOutput(bmdAudioSampleRate48kHz,
256 bmdAudioSampleType16bitInteger,
257 c->channels,
258 bmdAudioOutputStreamTimestamped) != S_OK) {
259 av_log(avctx, AV_LOG_ERROR, "Could not enable audio output!\n");
260 return -1;
261 }
262 if (ctx->dlo->BeginAudioPreroll() != S_OK) {
263 av_log(avctx, AV_LOG_ERROR, "Could not begin audio preroll!\n");
264 return -1;
265 }
266
267 /* The device expects the sample rate to be fixed. */
268 avpriv_set_pts_info(st, 64, 1, c->sample_rate);
269 ctx->channels = c->channels;
270
271 ctx->audio = 1;
272
273 return 0;
274 }
275
ff_decklink_write_trailer(AVFormatContext * avctx)276 av_cold int ff_decklink_write_trailer(AVFormatContext *avctx)
277 {
278 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
279 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
280
281 if (ctx->playback_started) {
282 BMDTimeValue actual;
283 ctx->dlo->StopScheduledPlayback(ctx->last_pts * ctx->bmd_tb_num,
284 &actual, ctx->bmd_tb_den);
285 ctx->dlo->DisableVideoOutput();
286 if (ctx->audio)
287 ctx->dlo->DisableAudioOutput();
288 }
289
290 ff_decklink_cleanup(avctx);
291
292 if (ctx->output_callback)
293 delete ctx->output_callback;
294
295 pthread_mutex_destroy(&ctx->mutex);
296 pthread_cond_destroy(&ctx->cond);
297
298 #if CONFIG_LIBKLVANC
299 klvanc_context_destroy(ctx->vanc_ctx);
300 #endif
301
302 av_freep(&cctx->ctx);
303
304 return 0;
305 }
306
307 #if CONFIG_LIBKLVANC
construct_cc(AVFormatContext * avctx,struct decklink_ctx * ctx,AVPacket * pkt,struct klvanc_line_set_s * vanc_lines)308 static void construct_cc(AVFormatContext *avctx, struct decklink_ctx *ctx,
309 AVPacket *pkt, struct klvanc_line_set_s *vanc_lines)
310 {
311 struct klvanc_packet_eia_708b_s *cdp;
312 uint16_t *cdp_words;
313 uint16_t len;
314 uint8_t cc_count;
315 int size, ret, i;
316
317 const uint8_t *data = av_packet_get_side_data(pkt, AV_PKT_DATA_A53_CC, &size);
318 if (!data)
319 return;
320
321 cc_count = size / 3;
322
323 ret = klvanc_create_eia708_cdp(&cdp);
324 if (ret)
325 return;
326
327 ret = klvanc_set_framerate_EIA_708B(cdp, ctx->bmd_tb_num, ctx->bmd_tb_den);
328 if (ret) {
329 av_log(avctx, AV_LOG_ERROR, "Invalid framerate specified: %lld/%lld\n",
330 ctx->bmd_tb_num, ctx->bmd_tb_den);
331 klvanc_destroy_eia708_cdp(cdp);
332 return;
333 }
334
335 if (cc_count > KLVANC_MAX_CC_COUNT) {
336 av_log(avctx, AV_LOG_ERROR, "Illegal cc_count received: %d\n", cc_count);
337 cc_count = KLVANC_MAX_CC_COUNT;
338 }
339
340 /* CC data */
341 cdp->header.ccdata_present = 1;
342 cdp->header.caption_service_active = 1;
343 cdp->ccdata.cc_count = cc_count;
344 for (i = 0; i < cc_count; i++) {
345 if (data [3*i] & 0x04)
346 cdp->ccdata.cc[i].cc_valid = 1;
347 cdp->ccdata.cc[i].cc_type = data[3*i] & 0x03;
348 cdp->ccdata.cc[i].cc_data[0] = data[3*i+1];
349 cdp->ccdata.cc[i].cc_data[1] = data[3*i+2];
350 }
351
352 klvanc_finalize_EIA_708B(cdp, ctx->cdp_sequence_num++);
353 ret = klvanc_convert_EIA_708B_to_words(cdp, &cdp_words, &len);
354 klvanc_destroy_eia708_cdp(cdp);
355 if (ret != 0) {
356 av_log(avctx, AV_LOG_ERROR, "Failed converting 708 packet to words\n");
357 return;
358 }
359
360 ret = klvanc_line_insert(ctx->vanc_ctx, vanc_lines, cdp_words, len, 11, 0);
361 free(cdp_words);
362 if (ret != 0) {
363 av_log(avctx, AV_LOG_ERROR, "VANC line insertion failed\n");
364 return;
365 }
366 }
367
decklink_construct_vanc(AVFormatContext * avctx,struct decklink_ctx * ctx,AVPacket * pkt,decklink_frame * frame)368 static int decklink_construct_vanc(AVFormatContext *avctx, struct decklink_ctx *ctx,
369 AVPacket *pkt, decklink_frame *frame)
370 {
371 struct klvanc_line_set_s vanc_lines = { 0 };
372 int ret = 0, i;
373
374 if (!ctx->supports_vanc)
375 return 0;
376
377 construct_cc(avctx, ctx, pkt, &vanc_lines);
378
379 IDeckLinkVideoFrameAncillary *vanc;
380 int result = ctx->dlo->CreateAncillaryData(bmdFormat10BitYUV, &vanc);
381 if (result != S_OK) {
382 av_log(avctx, AV_LOG_ERROR, "Failed to create vanc\n");
383 ret = AVERROR(EIO);
384 goto done;
385 }
386
387 /* Now that we've got all the VANC lines in a nice orderly manner, generate the
388 final VANC sections for the Decklink output */
389 for (i = 0; i < vanc_lines.num_lines; i++) {
390 struct klvanc_line_s *line = vanc_lines.lines[i];
391 int real_line;
392 void *buf;
393
394 if (!line)
395 break;
396
397 /* FIXME: include hack for certain Decklink cards which mis-represent
398 line numbers for pSF frames */
399 real_line = line->line_number;
400
401 result = vanc->GetBufferForVerticalBlankingLine(real_line, &buf);
402 if (result != S_OK) {
403 av_log(avctx, AV_LOG_ERROR, "Failed to get VANC line %d: %d", real_line, result);
404 continue;
405 }
406
407 /* Generate the full line taking into account all VANC packets on that line */
408 result = klvanc_generate_vanc_line_v210(ctx->vanc_ctx, line, (uint8_t *) buf,
409 ctx->bmd_width);
410 if (result) {
411 av_log(avctx, AV_LOG_ERROR, "Failed to generate VANC line\n");
412 continue;
413 }
414 }
415
416 result = frame->SetAncillaryData(vanc);
417 vanc->Release();
418 if (result != S_OK) {
419 av_log(avctx, AV_LOG_ERROR, "Failed to set vanc: %d", result);
420 ret = AVERROR(EIO);
421 }
422
423 done:
424 for (i = 0; i < vanc_lines.num_lines; i++)
425 klvanc_line_free(vanc_lines.lines[i]);
426
427 return ret;
428 }
429 #endif
430
decklink_write_video_packet(AVFormatContext * avctx,AVPacket * pkt)431 static int decklink_write_video_packet(AVFormatContext *avctx, AVPacket *pkt)
432 {
433 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
434 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
435 AVStream *st = avctx->streams[pkt->stream_index];
436 AVFrame *avframe = NULL, *tmp = (AVFrame *)pkt->data;
437 AVPacket *avpacket = NULL;
438 decklink_frame *frame;
439 buffercount_type buffered;
440 HRESULT hr;
441
442 if (st->codecpar->codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) {
443 if (tmp->format != AV_PIX_FMT_UYVY422 ||
444 tmp->width != ctx->bmd_width ||
445 tmp->height != ctx->bmd_height) {
446 av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid pixel format or dimension.\n");
447 return AVERROR(EINVAL);
448 }
449
450 avframe = av_frame_clone(tmp);
451 if (!avframe) {
452 av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n");
453 return AVERROR(EIO);
454 }
455
456 frame = new decklink_frame(ctx, avframe, st->codecpar->codec_id, avframe->height, avframe->width);
457 } else {
458 avpacket = av_packet_clone(pkt);
459 if (!avpacket) {
460 av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n");
461 return AVERROR(EIO);
462 }
463
464 frame = new decklink_frame(ctx, avpacket, st->codecpar->codec_id, ctx->bmd_height, ctx->bmd_width);
465
466 #if CONFIG_LIBKLVANC
467 if (decklink_construct_vanc(avctx, ctx, pkt, frame))
468 av_log(avctx, AV_LOG_ERROR, "Failed to construct VANC\n");
469 #endif
470 }
471
472 if (!frame) {
473 av_log(avctx, AV_LOG_ERROR, "Could not create new frame.\n");
474 av_frame_free(&avframe);
475 av_packet_free(&avpacket);
476 return AVERROR(EIO);
477 }
478
479 /* Always keep at most one second of frames buffered. */
480 pthread_mutex_lock(&ctx->mutex);
481 while (ctx->frames_buffer_available_spots == 0) {
482 pthread_cond_wait(&ctx->cond, &ctx->mutex);
483 }
484 ctx->frames_buffer_available_spots--;
485 pthread_mutex_unlock(&ctx->mutex);
486
487 /* Schedule frame for playback. */
488 hr = ctx->dlo->ScheduleVideoFrame((class IDeckLinkVideoFrame *) frame,
489 pkt->pts * ctx->bmd_tb_num,
490 ctx->bmd_tb_num, ctx->bmd_tb_den);
491 /* Pass ownership to DeckLink, or release on failure */
492 frame->Release();
493 if (hr != S_OK) {
494 av_log(avctx, AV_LOG_ERROR, "Could not schedule video frame."
495 " error %08x.\n", (uint32_t) hr);
496 return AVERROR(EIO);
497 }
498
499 ctx->dlo->GetBufferedVideoFrameCount(&buffered);
500 av_log(avctx, AV_LOG_DEBUG, "Buffered video frames: %d.\n", (int) buffered);
501 if (pkt->pts > 2 && buffered <= 2)
502 av_log(avctx, AV_LOG_WARNING, "There are not enough buffered video frames."
503 " Video may misbehave!\n");
504
505 /* Preroll video frames. */
506 if (!ctx->playback_started && pkt->pts > ctx->frames_preroll) {
507 av_log(avctx, AV_LOG_DEBUG, "Ending audio preroll.\n");
508 if (ctx->audio && ctx->dlo->EndAudioPreroll() != S_OK) {
509 av_log(avctx, AV_LOG_ERROR, "Could not end audio preroll!\n");
510 return AVERROR(EIO);
511 }
512 av_log(avctx, AV_LOG_DEBUG, "Starting scheduled playback.\n");
513 if (ctx->dlo->StartScheduledPlayback(0, ctx->bmd_tb_den, 1.0) != S_OK) {
514 av_log(avctx, AV_LOG_ERROR, "Could not start scheduled playback!\n");
515 return AVERROR(EIO);
516 }
517 ctx->playback_started = 1;
518 }
519
520 return 0;
521 }
522
decklink_write_audio_packet(AVFormatContext * avctx,AVPacket * pkt)523 static int decklink_write_audio_packet(AVFormatContext *avctx, AVPacket *pkt)
524 {
525 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
526 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
527 int sample_count = pkt->size / (ctx->channels << 1);
528 buffercount_type buffered;
529
530 ctx->dlo->GetBufferedAudioSampleFrameCount(&buffered);
531 if (pkt->pts > 1 && !buffered)
532 av_log(avctx, AV_LOG_WARNING, "There's no buffered audio."
533 " Audio will misbehave!\n");
534
535 if (ctx->dlo->ScheduleAudioSamples(pkt->data, sample_count, pkt->pts,
536 bmdAudioSampleRate48kHz, NULL) != S_OK) {
537 av_log(avctx, AV_LOG_ERROR, "Could not schedule audio samples.\n");
538 return AVERROR(EIO);
539 }
540
541 return 0;
542 }
543
544 extern "C" {
545
ff_decklink_write_header(AVFormatContext * avctx)546 av_cold int ff_decklink_write_header(AVFormatContext *avctx)
547 {
548 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
549 struct decklink_ctx *ctx;
550 unsigned int n;
551 int ret;
552
553 ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));
554 if (!ctx)
555 return AVERROR(ENOMEM);
556 ctx->list_devices = cctx->list_devices;
557 ctx->list_formats = cctx->list_formats;
558 ctx->preroll = cctx->preroll;
559 ctx->duplex_mode = cctx->duplex_mode;
560 cctx->ctx = ctx;
561 #if CONFIG_LIBKLVANC
562 if (klvanc_context_create(&ctx->vanc_ctx) < 0) {
563 av_log(avctx, AV_LOG_ERROR, "Cannot create VANC library context\n");
564 return AVERROR(ENOMEM);
565 }
566 ctx->supports_vanc = 1;
567 #endif
568
569 /* List available devices and exit. */
570 if (ctx->list_devices) {
571 av_log(avctx, AV_LOG_WARNING, "The -list_devices option is deprecated and will be removed. Please use ffmpeg -sinks decklink instead.\n");
572 ff_decklink_list_devices_legacy(avctx, 0, 1);
573 return AVERROR_EXIT;
574 }
575
576 ret = ff_decklink_init_device(avctx, avctx->url);
577 if (ret < 0)
578 return ret;
579
580 /* Get output device. */
581 if (ctx->dl->QueryInterface(IID_IDeckLinkOutput, (void **) &ctx->dlo) != S_OK) {
582 av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n",
583 avctx->url);
584 ret = AVERROR(EIO);
585 goto error;
586 }
587
588 /* List supported formats. */
589 if (ctx->list_formats) {
590 ff_decklink_list_formats(avctx);
591 ret = AVERROR_EXIT;
592 goto error;
593 }
594
595 /* Setup streams. */
596 ret = AVERROR(EIO);
597 for (n = 0; n < avctx->nb_streams; n++) {
598 AVStream *st = avctx->streams[n];
599 AVCodecParameters *c = st->codecpar;
600 if (c->codec_type == AVMEDIA_TYPE_AUDIO) {
601 if (decklink_setup_audio(avctx, st))
602 goto error;
603 } else if (c->codec_type == AVMEDIA_TYPE_VIDEO) {
604 if (decklink_setup_video(avctx, st))
605 goto error;
606 } else {
607 av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n");
608 goto error;
609 }
610 }
611
612 return 0;
613
614 error:
615 ff_decklink_cleanup(avctx);
616 return ret;
617 }
618
ff_decklink_write_packet(AVFormatContext * avctx,AVPacket * pkt)619 int ff_decklink_write_packet(AVFormatContext *avctx, AVPacket *pkt)
620 {
621 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
622 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
623 AVStream *st = avctx->streams[pkt->stream_index];
624
625 ctx->last_pts = FFMAX(ctx->last_pts, pkt->pts);
626
627 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
628 return decklink_write_video_packet(avctx, pkt);
629 else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
630 return decklink_write_audio_packet(avctx, pkt);
631
632 return AVERROR(EIO);
633 }
634
ff_decklink_list_output_devices(AVFormatContext * avctx,struct AVDeviceInfoList * device_list)635 int ff_decklink_list_output_devices(AVFormatContext *avctx, struct AVDeviceInfoList *device_list)
636 {
637 return ff_decklink_list_devices(avctx, device_list, 0, 1);
638 }
639
640 } /* extern "C" */
641