FFmpeg: libavdevice/decklink_dec.cpp Source File

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decklink_dec.cpp

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1 /*

2 * Blackmagic DeckLink input

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 */

22 #include <DeckLinkAPI.h>

24 #include <pthread.h>

25 #include <semaphore.h>

27 extern "C" {

28 #include "config.h"

29 #include "libavformat/avformat.h"

30 #include "libavformat/internal.h"

31 #include "libavutil/avutil.h"

32 #include "libavutil/common.h"

33 #include "libavutil/imgutils.h"

34 #include "libavutil/time.h"

35 #include "libavutil/mathematics.h"

36 #if CONFIG_LIBZVBI

37 #include <libzvbi.h>

38 #endif

39 }

41 #include "decklink_common.h"

42 #include "decklink_dec.h"

44 #if CONFIG_LIBZVBI

45 static uint8_t calc_parity_and_line_offset(int line)

46 {

47 uint8_t ret = (line < 313) << 5;

48 if (line >= 7 && line <= 22)

49 ret += line;

50 if (line >= 320 && line <= 335)

51 ret += (line - 313);

52 return ret;

53 }

55 int teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt)

56 {

57 vbi_bit_slicer slicer;

59 vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, VBI_PIXFMT_UYVY);

61 if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE)

62 return -1;

64 tgt[0] = 0x02; // data_unit_id

65 tgt[1] = 0x2c; // data_unit_length

66 tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset

67 tgt[3] = 0xe4; // framing code

69 return 0;

70 }

71 #endif

73 static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)

74 {

75 memset(q, 0, sizeof(AVPacketQueue));

76 pthread_mutex_init(&q->mutex, NULL);

77 pthread_cond_init(&q->cond, NULL);

78 q->avctx = avctx;

79 }

81 static void avpacket_queue_flush(AVPacketQueue *q)

82 {

83 AVPacketList *pkt, *pkt1;

85 pthread_mutex_lock(&q->mutex);

86 for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {

87 pkt1 = pkt->next;

88 av_packet_unref(&pkt->pkt);

89 av_freep(&pkt);

90 }

91 q->last_pkt = NULL;

92 q->first_pkt = NULL;

93 q->nb_packets = 0;

94 q->size = 0;

95 pthread_mutex_unlock(&q->mutex);

96 }

98 static void avpacket_queue_end(AVPacketQueue *q)

99 {

100 avpacket_queue_flush(q);

101 pthread_mutex_destroy(&q->mutex);

102 pthread_cond_destroy(&q->cond);

103 }

104

105 static unsigned long long avpacket_queue_size(AVPacketQueue *q)

106 {

107 unsigned long long size;

108 pthread_mutex_lock(&q->mutex);

109 size = q->size;

110 pthread_mutex_unlock(&q->mutex);

111 return size;

112 }

113

114 static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt)

115 {

116 AVPacketList *pkt1;

117

118 // Drop Packet if queue size is > 1GB

119 if (avpacket_queue_size(q) > 1024 * 1024 * 1024 ) {

120 av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");

121 return -1;

122 }

123 /* duplicate the packet */

124 if (av_dup_packet(pkt) < 0) {

125 return -1;

126 }

127

128 pkt1 = (AVPacketList *)av_malloc(sizeof(AVPacketList));

129 if (!pkt1) {

130 return -1;

131 }

132 pkt1->pkt = *pkt;

133 pkt1->next = NULL;

134

135 pthread_mutex_lock(&q->mutex);

136

137 if (!q->last_pkt) {

138 q->first_pkt = pkt1;

139 } else {

140 q->last_pkt->next = pkt1;

141 }

142

143 q->last_pkt = pkt1;

144 q->nb_packets++;

145 q->size += pkt1->pkt.size + sizeof(*pkt1);

146

147 pthread_cond_signal(&q->cond);

148

149 pthread_mutex_unlock(&q->mutex);

150 return 0;

151 }

152

153 static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block)

154 {

155 AVPacketList *pkt1;

156 int ret;

157

158 pthread_mutex_lock(&q->mutex);

159

160 for (;; ) {

161 pkt1 = q->first_pkt;

162 if (pkt1) {

163 q->first_pkt = pkt1->next;

164 if (!q->first_pkt) {

165 q->last_pkt = NULL;

166 }

167 q->nb_packets--;

168 q->size -= pkt1->pkt.size + sizeof(*pkt1);

169 *pkt = pkt1->pkt;

170 av_free(pkt1);

171 ret = 1;

172 break;

173 } else if (!block) {

174 ret = 0;

175 break;

176 } else {

177 pthread_cond_wait(&q->cond, &q->mutex);

178 }

179 }

180 pthread_mutex_unlock(&q->mutex);

181 return ret;

182 }

183

184 class decklink_input_callback : public IDeckLinkInputCallback

185 {

186 public:

187 decklink_input_callback(AVFormatContext *_avctx);

188 ~decklink_input_callback();

189

190 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }

191 virtual ULONG STDMETHODCALLTYPE AddRef(void);

192 virtual ULONG STDMETHODCALLTYPE Release(void);

193 virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags);

194 virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*);

195

196 private:

197 ULONG m_refCount;

198 pthread_mutex_t m_mutex;

199 AVFormatContext *avctx;

200 decklink_ctx *ctx;

201 int no_video;

202 int64_t initial_video_pts;

203 int64_t initial_audio_pts;

204 };

205

206 decklink_input_callback::decklink_input_callback(AVFormatContext *_avctx) : m_refCount(0)

207 {

208 avctx = _avctx;

209 decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

210 ctx = (struct decklink_ctx *)cctx->ctx;

211 initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE;

212 pthread_mutex_init(&m_mutex, NULL);

213 }

214

215 decklink_input_callback::~decklink_input_callback()

216 {

217 pthread_mutex_destroy(&m_mutex);

218 }

219

220 ULONG decklink_input_callback::AddRef(void)

221 {

222 pthread_mutex_lock(&m_mutex);

223 m_refCount++;

224 pthread_mutex_unlock(&m_mutex);

225

226 return (ULONG)m_refCount;

227 }

228

229 ULONG decklink_input_callback::Release(void)

230 {

231 pthread_mutex_lock(&m_mutex);

232 m_refCount--;

233 pthread_mutex_unlock(&m_mutex);

234

235 if (m_refCount == 0) {

236 delete this;

237 return 0;

238 }

239

240 return (ULONG)m_refCount;

241 }

242

243 static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,

244 IDeckLinkAudioInputPacket *audioFrame,

245 int64_t wallclock,

246 DecklinkPtsSource pts_src,

247 AVRational time_base, int64_t *initial_pts)

248 {

249 int64_t pts = AV_NOPTS_VALUE;

250 BMDTimeValue bmd_pts;

251 BMDTimeValue bmd_duration;

252 HRESULT res = E_INVALIDARG;

253 switch (pts_src) {

254 case PTS_SRC_AUDIO:

255 if (audioFrame)

256 res = audioFrame->GetPacketTime(&bmd_pts, time_base.den);

257 break;

258 case PTS_SRC_VIDEO:

259 if (videoFrame)

260 res = videoFrame->GetStreamTime(&bmd_pts, &bmd_duration, time_base.den);

261 break;

262 case PTS_SRC_REFERENCE:

263 if (videoFrame)

264 res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration);

265 break;

266 case PTS_SRC_WALLCLOCK:

267 pts = av_rescale_q(wallclock, AV_TIME_BASE_Q, time_base);

268 break;

269 }

270 if (res == S_OK)

271 pts = bmd_pts / time_base.num;

272

273 if (pts != AV_NOPTS_VALUE && *initial_pts == AV_NOPTS_VALUE)

274 *initial_pts = pts;

275 if (*initial_pts != AV_NOPTS_VALUE)

276 pts -= *initial_pts;

277

278 return pts;

279 }

280

281 HRESULT decklink_input_callback::VideoInputFrameArrived(

282 IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)

283 {

284 void *frameBytes;

285 void *audioFrameBytes;

286 BMDTimeValue frameTime;

287 BMDTimeValue frameDuration;

288 int64_t wallclock = 0;

289

290 ctx->frameCount++;

291 if (ctx->audio_pts_source == PTS_SRC_WALLCLOCK || ctx->video_pts_source == PTS_SRC_WALLCLOCK)

292 wallclock = av_gettime_relative();

293

294 // Handle Video Frame

295 if (videoFrame) {

296 AVPacket pkt;

297 av_init_packet(&pkt);

298 if (ctx->frameCount % 25 == 0) {

299 unsigned long long qsize = avpacket_queue_size(&ctx->queue);

300 av_log(avctx, AV_LOG_DEBUG,

301 "Frame received (#%lu) - Valid (%liB) - QSize %fMB\n",

302 ctx->frameCount,

303 videoFrame->GetRowBytes() * videoFrame->GetHeight(),

304 (double)qsize / 1024 / 1024);

305 }

306

307 videoFrame->GetBytes(&frameBytes);

308 videoFrame->GetStreamTime(&frameTime, &frameDuration,

309 ctx->video_st->time_base.den);

310

311 if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {

312 if (ctx->draw_bars && videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {

313 unsigned bars[8] = {

314 0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,

315 0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };

316 int width = videoFrame->GetWidth();

317 int height = videoFrame->GetHeight();

318 unsigned *p = (unsigned *)frameBytes;

319

320 for (int y = 0; y < height; y++) {

321 for (int x = 0; x < width; x += 2)

322 *p++ = bars[(x * 8) / width];

323 }

324 }

325

326 if (!no_video) {

327 av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected "

328 "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);

329 }

330 no_video = 1;

331 } else {

332 if (no_video) {

333 av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned "

334 "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);

335 }

336 no_video = 0;

337 }

338

339 pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts);

340 pkt.dts = pkt.pts;

341

342 pkt.duration = frameDuration;

343 //To be made sure it still applies

344 pkt.flags |= AV_PKT_FLAG_KEY;

345 pkt.stream_index = ctx->video_st->index;

346 pkt.data = (uint8_t *)frameBytes;

347 pkt.size = videoFrame->GetRowBytes() *

348 videoFrame->GetHeight();

349 //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);

350

351 #if CONFIG_LIBZVBI

352 if (!no_video && ctx->teletext_lines && videoFrame->GetPixelFormat() == bmdFormat8BitYUV && videoFrame->GetWidth() == 720) {

353 IDeckLinkVideoFrameAncillary *vanc;

354 AVPacket txt_pkt;

355 uint8_t txt_buf0[1611]; // max 35 * 46 bytes decoded teletext lines + 1 byte data_identifier

356 uint8_t *txt_buf = txt_buf0;

357

358 if (videoFrame->GetAncillaryData(&vanc) == S_OK) {

359 int i;

360 int64_t line_mask = 1;

361 txt_buf[0] = 0x10; // data_identifier - EBU_data

362 txt_buf++;

363 for (i = 6; i < 336; i++, line_mask <<= 1) {

364 uint8_t *buf;

365 if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {

366 if (teletext_data_unit_from_vbi_data(i, buf, txt_buf) >= 0)

367 txt_buf += 46;

368 }

369 if (i == 22)

370 i = 317;

371 }

372 vanc->Release();

373 if (txt_buf - txt_buf0 > 1) {

374 int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;

375 while (stuffing_units--) {

376 memset(txt_buf, 0xff, 46);

377 txt_buf[1] = 0x2c; // data_unit_length

378 txt_buf += 46;

379 }

380 av_init_packet(&txt_pkt);

381 txt_pkt.pts = pkt.pts;

382 txt_pkt.dts = pkt.dts;

383 txt_pkt.stream_index = ctx->teletext_st->index;

384 txt_pkt.data = txt_buf0;

385 txt_pkt.size = txt_buf - txt_buf0;

386 if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) {

387 ++ctx->dropped;

388 }

389 }

390 }

391 }

392 #endif

393

394 if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {

395 ++ctx->dropped;

396 }

397 }

398

399 // Handle Audio Frame

400 if (audioFrame) {

401 AVPacket pkt;

402 BMDTimeValue audio_pts;

403 av_init_packet(&pkt);

404

405 //hack among hacks

406 pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->channels * (16 / 8);

407 audioFrame->GetBytes(&audioFrameBytes);

408 audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);

409 pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts);

410 pkt.dts = pkt.pts;

411

412 //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts);

413 pkt.flags |= AV_PKT_FLAG_KEY;

414 pkt.stream_index = ctx->audio_st->index;

415 pkt.data = (uint8_t *)audioFrameBytes;

416

417 if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {

418 ++ctx->dropped;

419 }

420 }

421

422 return S_OK;

423 }

424

425 HRESULT decklink_input_callback::VideoInputFormatChanged(

426 BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,

427 BMDDetectedVideoInputFormatFlags)

428 {

429 return S_OK;

430 }

431

432 static HRESULT decklink_start_input(AVFormatContext *avctx)

433 {

434 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

435 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

436

437 ctx->input_callback = new decklink_input_callback(avctx);

438 ctx->dli->SetCallback(ctx->input_callback);

439 return ctx->dli->StartStreams();

440 }

441

442 extern "C" {

443

444 av_cold int ff_decklink_read_close(AVFormatContext *avctx)

445 {

446 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

447 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

448

449 if (ctx->capture_started) {

450 ctx->dli->StopStreams();

451 ctx->dli->DisableVideoInput();

452 ctx->dli->DisableAudioInput();

453 }

454

455 ff_decklink_cleanup(avctx);

456 avpacket_queue_end(&ctx->queue);

457

458 av_freep(&cctx->ctx);

459

460 return 0;

461 }

462

463 av_cold int ff_decklink_read_header(AVFormatContext *avctx)

464 {

465 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

466 struct decklink_ctx *ctx;

467 AVStream *st;

468 HRESULT result;

469 char fname[1024];

470 char *tmp;

471 int mode_num = 0;

472 int ret;

473

474 ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));

475 if (!ctx)

476 return AVERROR(ENOMEM);

477 ctx->list_devices = cctx->list_devices;

478 ctx->list_formats = cctx->list_formats;

479 ctx->teletext_lines = cctx->teletext_lines;

480 ctx->preroll = cctx->preroll;

481 ctx->duplex_mode = cctx->duplex_mode;

482 if (cctx->video_input > 0 && (unsigned int)cctx->video_input < FF_ARRAY_ELEMS(decklink_video_connection_map))

483 ctx->video_input = decklink_video_connection_map[cctx->video_input];

484 if (cctx->audio_input > 0 && (unsigned int)cctx->audio_input < FF_ARRAY_ELEMS(decklink_audio_connection_map))

485 ctx->audio_input = decklink_audio_connection_map[cctx->audio_input];

486 ctx->audio_pts_source = cctx->audio_pts_source;

487 ctx->video_pts_source = cctx->video_pts_source;

488 ctx->draw_bars = cctx->draw_bars;

489 cctx->ctx = ctx;

490

491 #if !CONFIG_LIBZVBI

492 if (ctx->teletext_lines) {

493 av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing teletext, please recompile FFmpeg.\n");

494 return AVERROR(ENOSYS);

495 }

496 #endif

497

498 /* Check audio channel option for valid values: 2, 8 or 16 */

499 switch (cctx->audio_channels) {

500 case 2:

501 case 8:

502 case 16:

503 break;

504 default:

505 av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n");

506 return AVERROR(EINVAL);

507 }

508

509 /* List available devices. */

510 if (ctx->list_devices) {

511 ff_decklink_list_devices(avctx);

512 return AVERROR_EXIT;

513 }

514

515 strcpy (fname, avctx->filename);

516 tmp=strchr (fname, '@');

517 if (tmp != NULL) {

518 mode_num = atoi (tmp+1);

519 *tmp = 0;

520 }

521

522 ret = ff_decklink_init_device(avctx, fname);

523 if (ret < 0)

524 return ret;

525

526 /* Get input device. */

527 if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) {

528 av_log(avctx, AV_LOG_ERROR, "Could not open input device from '%s'\n",

529 avctx->filename);

530 ret = AVERROR(EIO);

531 goto error;

532 }

533

534 /* List supported formats. */

535 if (ctx->list_formats) {

536 ff_decklink_list_formats(avctx, DIRECTION_IN);

537 ret = AVERROR_EXIT;

538 goto error;

539 }

540

541 if (mode_num > 0) {

542 if (ff_decklink_set_format(avctx, DIRECTION_IN, mode_num) < 0) {

543 av_log(avctx, AV_LOG_ERROR, "Could not set mode %d for %s\n", mode_num, fname);

544 ret = AVERROR(EIO);

545 goto error;

546 }

547 }

548

549 /* Setup streams. */

550 st = avformat_new_stream(avctx, NULL);

551 if (!st) {

552 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");

553 ret = AVERROR(ENOMEM);

554 goto error;

555 }

556 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;

557 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;

558 st->codecpar->sample_rate = bmdAudioSampleRate48kHz;

559 st->codecpar->channels = cctx->audio_channels;

560 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */

561 ctx->audio_st=st;

562

563 st = avformat_new_stream(avctx, NULL);

564 if (!st) {

565 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");

566 ret = AVERROR(ENOMEM);

567 goto error;

568 }

569 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;

570 st->codecpar->width = ctx->bmd_width;

571 st->codecpar->height = ctx->bmd_height;

572

573 st->time_base.den = ctx->bmd_tb_den;

574 st->time_base.num = ctx->bmd_tb_num;

575 av_stream_set_r_frame_rate(st, av_make_q(st->time_base.den, st->time_base.num));

576

577 if (cctx->v210) {

578 st->codecpar->codec_id = AV_CODEC_ID_V210;

579 st->codecpar->codec_tag = MKTAG('V', '2', '1', '0');

580 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 64, st->time_base.den, st->time_base.num * 3);

581 } else {

582 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;

583 st->codecpar->format = AV_PIX_FMT_UYVY422;

584 st->codecpar->codec_tag = MKTAG('U', 'Y', 'V', 'Y');

585 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 16, st->time_base.den, st->time_base.num);

586 }

587

588 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */

589

590 ctx->video_st=st;

591

592 if (ctx->teletext_lines) {

593 st = avformat_new_stream(avctx, NULL);

594 if (!st) {

595 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");

596 ret = AVERROR(ENOMEM);

597 goto error;

598 }

599 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;

600 st->time_base.den = ctx->bmd_tb_den;

601 st->time_base.num = ctx->bmd_tb_num;

602 st->codecpar->codec_id = AV_CODEC_ID_DVB_TELETEXT;

603 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */

604 ctx->teletext_st = st;

605 }

606

607 av_log(avctx, AV_LOG_VERBOSE, "Using %d input audio channels\n", ctx->audio_st->codecpar->channels);

608 result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, ctx->audio_st->codecpar->channels);

609

610 if (result != S_OK) {

611 av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n");

612 ret = AVERROR(EIO);

613 goto error;

614 }

615

616 result = ctx->dli->EnableVideoInput(ctx->bmd_mode,

617 cctx->v210 ? bmdFormat10BitYUV : bmdFormat8BitYUV,

618 bmdVideoInputFlagDefault);

619

620 if (result != S_OK) {

621 av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n");

622 ret = AVERROR(EIO);

623 goto error;

624 }

625

626 avpacket_queue_init (avctx, &ctx->queue);

627

628 if (decklink_start_input (avctx) != S_OK) {

629 av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n");

630 ret = AVERROR(EIO);

631 goto error;

632 }

633

634 return 0;

635

636 error:

637 ff_decklink_cleanup(avctx);

638 return ret;

639 }

640

641 int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt)

642 {

643 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;

644 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;

645 AVFrame *frame = ctx->video_st->codec->coded_frame;

646

647 avpacket_queue_get(&ctx->queue, pkt, 1);

648 if (frame && (ctx->bmd_field_dominance == bmdUpperFieldFirst || ctx->bmd_field_dominance == bmdLowerFieldFirst)) {

649 frame->interlaced_frame = 1;

650 if (ctx->bmd_field_dominance == bmdUpperFieldFirst) {

651 frame->top_field_first = 1;

652 }

653 }

654

655 return 0;

656 }

657

658 } /* extern "C" */

AV_PIX_FMT_UYVY422

packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1

Definition: pixfmt.h:82

NULL

#define NULL

Definition: coverity.c:32

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void * ctx

Definition: decklink_common_c.h:35

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static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)

Definition: os2threads.h:106

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#define S_OK

Definition: windows2linux.h:40

AVFrame

This structure describes decoded (raw) audio or video data.

Definition: frame.h:184

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int v210

Definition: decklink_common_c.h:42

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AVFormatContext * avctx

Definition: decklink_dec.cpp:199

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static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)

Definition: os2threads.h:164

AV_CODEC_ID_DVB_TELETEXT

Definition: avcodec.h:611

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~decklink_input_callback()

Definition: decklink_dec.cpp:215

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misc image utilities

AV_LOG_WARNING

#define AV_LOG_WARNING

Something somehow does not look correct.

Definition: log.h:182

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void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)

Set the time base and wrapping info for a given stream.

Definition: utils.c:4560

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int duplex_mode

Definition: decklink_common_c.h:44

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void av_stream_set_r_frame_rate(AVStream *s, AVRational r)

AVRational::num

int num

Numerator.

Definition: rational.h:59

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int index

stream index in AVFormatContext

Definition: avformat.h:890

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int64_t initial_audio_pts

Definition: decklink_dec.cpp:203

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Definition: avcodec.h:1602

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Definition: basicDataTypeConversions.h:70

avutil.h

Convenience header that includes libavutil's core.

time.h

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static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)

Definition: decklink_dec.cpp:73

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int ff_decklink_init_device(AVFormatContext *avctx, const char *name)

Definition: decklink_common.cpp:323

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Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...

Definition: mem.c:252

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static AVPacket pkt

Definition: demuxing_decoding.c:54

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pthread_cond_t cond

Definition: decklink_common.h:38

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static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)

Definition: os2threads.h:138

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DecklinkPtsSource audio_pts_source

Definition: decklink_common.h:85

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Format I/O context.

Definition: avformat.h:1338

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int nb_packets

Definition: decklink_common.h:34

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static int16_t block[64]

Definition: dct.c:113

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int64_t teletext_lines

Definition: decklink_common.h:82

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unsigned int dropped

Definition: decklink_common.h:74

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Definition: decklink_dec.cpp:198

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static const BMDVideoConnection decklink_video_connection_map[]

Definition: decklink_common.h:120

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Definition: decklink_common_c.h:26

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HMTX pthread_mutex_t

Definition: os2threads.h:49

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Definition: decklink_dec.cpp:206

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uint8_t

Definition: audio_convert.c:194

DIRECTION_IN

Definition: decklink_common.h:97

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Definition: attributes.h:82

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Definition: decklink_common_c.h:45

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#define av_malloc(s)

Definition: tableprint_vlc.h:31

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Definition: decklink_common.h:37

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Definition: f_perms.c:27

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Definition: decklink_common_c.h:32

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AVPacket pkt

Definition: avformat.h:1948

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int64_t duration

Duration of this packet in AVStream->time_base units, 0 if unknown.

Definition: avcodec.h:1619

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Definition: decklink_common_c.h:25

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static const BMDAudioConnection decklink_audio_connection_map[]

Definition: decklink_common.h:110

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AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)

Add a new stream to a media file.

Definition: utils.c:4193

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static AVFrame * frame

Definition: demuxing_decoding.c:53

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Definition: avcodec.h:1601

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Definition: avformat.h:1947

AV_LOG_VERBOSE

#define AV_LOG_VERBOSE

Detailed information.

Definition: log.h:192

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int no_video

Definition: decklink_dec.cpp:201

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static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)

Definition: os2threads.h:146

AVFrame::interlaced_frame

int interlaced_frame

The content of the picture is interlaced.

Definition: frame.h:322

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ptrdiff_t size

Definition: opengl_enc.c:101

E_NOINTERFACE

#define E_NOINTERFACE

Definition: windows2linux.h:42

ff_decklink_set_format

int ff_decklink_set_format(AVFormatContext *avctx, int width, int height, int tb_num, int tb_den, decklink_direction_t direction, int num)

Definition: decklink_common.cpp:133

PTS_SRC_REFERENCE

Definition: decklink_common_c.h:28

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#define av_log(a,...)

Definition: tableprint_vlc.h:28

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AVStream * video_st

Definition: decklink_common.h:76

AV_PKT_FLAG_KEY

#define AV_PKT_FLAG_KEY

The packet contains a keyframe.

Definition: avcodec.h:1633

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

PTS_SRC_WALLCLOCK

Definition: decklink_common_c.h:29

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static void avpacket_queue_flush(AVPacketQueue *q)

Definition: decklink_dec.cpp:81

AV_LOG_ERROR

#define AV_LOG_ERROR

Something went wrong and cannot losslessly be recovered.

Definition: log.h:176

AVPacketQueue::last_pkt

AVPacketList * last_pkt

Definition: decklink_common.h:33

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#define AVERROR(e)

Definition: error.h:43

FALSE

#define FALSE

Definition: windows2linux.h:37

av_dup_packet

attribute_deprecated int av_dup_packet(AVPacket *pkt)

Definition: avpacket.c:253

AV_LOG_DEBUG

#define AV_LOG_DEBUG

Stuff which is only useful for libav* developers.

Definition: log.h:197

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int draw_bars

Definition: decklink_common_c.h:49

line

Definition: graph2dot.c:48

AVMEDIA_TYPE_AUDIO

Definition: avutil.h:196

internal.h

decklink_ctx::draw_bars

int draw_bars

Definition: decklink_common.h:87

ff_decklink_read_close

av_cold int ff_decklink_read_close(AVFormatContext *avctx)

Definition: decklink_dec.cpp:444

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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv)

Definition: decklink_dec.cpp:190

decklink_ctx

Definition: decklink_common.h:42

AVPacket::flags

int flags

A combination of AV_PKT_FLAG values.

Definition: avcodec.h:1607

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AVStream * teletext_st

Definition: decklink_common.h:77

PTS_SRC_VIDEO

Definition: decklink_common_c.h:27

AVFormatContext::filename

char filename[1024]

input or output filename

Definition: avformat.h:1414

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

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AVPacketList * first_pkt

Definition: decklink_common.h:33

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unsigned long long size

Definition: decklink_common.h:35

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#define width

ctx

AVFormatContext * ctx

Definition: movenc.c:48

pthread_mutex_init

static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)

Definition: os2threads.h:98

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AVPacketQueue queue

Definition: decklink_common.h:63

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int audio_input

Definition: decklink_common_c.h:47

ff_decklink_list_formats

int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)

Definition: decklink_common.cpp:256

src

#define src

Definition: vp9dsp.c:530

avpacket_queue_put

static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt)

Definition: decklink_dec.cpp:114

AVERROR_EXIT

#define AVERROR_EXIT

Immediate exit was requested; the called function should not be restarted.

Definition: error.h:56

decklink_ctx::frameCount

unsigned long frameCount

Definition: decklink_common.h:73

FF_ARRAY_ELEMS

#define FF_ARRAY_ELEMS(a)

Definition: sinewin_tablegen_template.c:36

decklink_input_callback::ctx

decklink_ctx * ctx

Definition: decklink_dec.cpp:200

AVStream

Stream structure.

Definition: avformat.h:889

AVPacketQueue

Definition: decklink_common.h:32

decklink_cctx::audio_channels

int audio_channels

Definition: decklink_common_c.h:43

decklink_input_callback::Release

virtual ULONG STDMETHODCALLTYPE Release(void)

Definition: decklink_dec.cpp:229

decklink_common.h

decklink_input_callback::VideoInputFrameArrived

virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame *, IDeckLinkAudioInputPacket *)

Definition: decklink_dec.cpp:281

decklink_input_callback::VideoInputFormatChanged

virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode *, BMDDetectedVideoInputFormatFlags)

Definition: decklink_dec.cpp:425

AV_TIME_BASE_Q

#define AV_TIME_BASE_Q

Internal time base represented as fractional value.

Definition: avutil.h:254

ff_decklink_list_devices

int ff_decklink_list_devices(AVFormatContext *avctx)

Definition: decklink_common.cpp:236

LPVOID

void * LPVOID

Definition: basicDataTypeConversions.h:19

av_make_q

static AVRational av_make_q(int num, int den)

Create an AVRational.

Definition: rational.h:71

decklink_ctx::video_pts_source

DecklinkPtsSource video_pts_source

Definition: decklink_common.h:86

av_packet_unref

void av_packet_unref(AVPacket *pkt)

Wipe the packet.

Definition: avpacket.c:567

decklink_cctx::list_formats

int list_formats

Definition: decklink_common_c.h:39

decklink_input_callback::m_refCount

ULONG m_refCount

Definition: decklink_dec.cpp:197

decklink_start_input

static HRESULT decklink_start_input(AVFormatContext *avctx)

Definition: decklink_dec.cpp:432

buf

void * buf

Definition: avisynth_c.h:690

decklink_cctx::list_devices

int list_devices

Definition: decklink_common_c.h:38

avpacket_queue_get

static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block)

Definition: decklink_dec.cpp:153

semaphore.h

AVRational

Rational number (pair of numerator and denominator).

Definition: rational.h:58

decklink_ctx::audio_st

AVStream * audio_st

Definition: decklink_common.h:75

AVPacketQueue::avctx

AVFormatContext * avctx

Definition: decklink_common.h:39

AV_CODEC_ID_V210

Definition: avcodec.h:324

pts

static int64_t pts

Global timestamp for the audio frames.

Definition: transcode_aac.c:579

av_gettime_relative

int64_t av_gettime_relative(void)

Get the current time in microseconds since some unspecified starting point.

Definition: time.c:56

HRESULT

DWORD HRESULT

Definition: basicDataTypeConversions.h:54

ff_decklink_cleanup

void ff_decklink_cleanup(AVFormatContext *avctx)

Definition: decklink_common.cpp:306

get_pkt_pts

static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame, int64_t wallclock, DecklinkPtsSource pts_src, AVRational time_base, int64_t *initial_pts)

Definition: decklink_dec.cpp:243

avformat.h

Main libavformat public API header.

avpacket_queue_end

static void avpacket_queue_end(AVPacketQueue *q)

Definition: decklink_dec.cpp:98

AVPacketList::next

struct AVPacketList * next

Definition: avformat.h:1949

common.h

common internal and external API header

decklink_input_callback::initial_video_pts