FFmpeg: libavdevice/decklink_dec.cpp Source File

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libavdevice

decklink_dec.cpp

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1 /*

2 * Blackmagic DeckLink output

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 "libavformat/avformat.h"

29 #include "libavformat/internal.h"

30 #include "libavutil/imgutils.h"

31 }

33 #include "decklink_common.h"

34 #include "decklink_dec.h"

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

37 {

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

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

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

41 q->avctx = avctx;

42 }

44 static void avpacket_queue_flush(AVPacketQueue *q)

45 {

46 AVPacketList *pkt, *pkt1;

48 pthread_mutex_lock(&q->mutex);

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

50 pkt1 = pkt->next;

51 av_free_packet(&pkt->pkt);

52 av_freep(&pkt);

53 }

54 q->last_pkt = NULL;

55 q->first_pkt = NULL;

56 q->nb_packets = 0;

57 q->size = 0;

58 pthread_mutex_unlock(&q->mutex);

59 }

61 static void avpacket_queue_end(AVPacketQueue *q)

62 {

63 avpacket_queue_flush(q);

64 pthread_mutex_destroy(&q->mutex);

65 pthread_cond_destroy(&q->cond);

66 }

68 static unsigned long long avpacket_queue_size(AVPacketQueue *q)

69 {

70 unsigned long long size;

71 pthread_mutex_lock(&q->mutex);

72 size = q->size;

73 pthread_mutex_unlock(&q->mutex);

74 return size;

75 }

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

78 {

79 AVPacketList *pkt1;

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

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

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

84 return -1;

85 }

86 /* duplicate the packet */

87 if (av_dup_packet(pkt) < 0) {

88 return -1;

89 }

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

92 if (!pkt1) {

93 return -1;

94 }

95 pkt1->pkt = *pkt;

96 pkt1->next = NULL;

98 pthread_mutex_lock(&q->mutex);

100 if (!q->last_pkt) {

101 q->first_pkt = pkt1;

102 } else {

103 q->last_pkt->next = pkt1;

104 }

105

106 q->last_pkt = pkt1;

107 q->nb_packets++;

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

109

110 pthread_cond_signal(&q->cond);

111

112 pthread_mutex_unlock(&q->mutex);

113 return 0;

114 }

115

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

117 {

118 AVPacketList *pkt1;

119 int ret;

120

121 pthread_mutex_lock(&q->mutex);

122

123 for (;; ) {

124 pkt1 = q->first_pkt;

125 if (pkt1) {

126 q->first_pkt = pkt1->next;

127 if (!q->first_pkt) {

128 q->last_pkt = NULL;

129 }

130 q->nb_packets--;

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

132 *pkt = pkt1->pkt;

133 av_free(pkt1);

134 ret = 1;

135 break;

136 } else if (!block) {

137 ret = 0;

138 break;

139 } else {

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

141 }

142 }

143 pthread_mutex_unlock(&q->mutex);

144 return ret;

145 }

146

147 class decklink_input_callback : public IDeckLinkInputCallback

148 {

149 public:

150 decklink_input_callback(AVFormatContext *_avctx);

151 ~decklink_input_callback();

152

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

154 virtual ULONG STDMETHODCALLTYPE AddRef(void);

155 virtual ULONG STDMETHODCALLTYPE Release(void);

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

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

158

159 private:

160 ULONG m_refCount;

161 pthread_mutex_t m_mutex;

162 AVFormatContext *avctx;

163 decklink_ctx *ctx;

164 int no_video;

165 int64_t initial_video_pts;

166 int64_t initial_audio_pts;

167 };

168

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

170 {

171 avctx = _avctx;

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

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

174 initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE;

175 pthread_mutex_init(&m_mutex, NULL);

176 }

177

178 decklink_input_callback::~decklink_input_callback()

179 {

180 pthread_mutex_destroy(&m_mutex);

181 }

182

183 ULONG decklink_input_callback::AddRef(void)

184 {

185 pthread_mutex_lock(&m_mutex);

186 m_refCount++;

187 pthread_mutex_unlock(&m_mutex);

188

189 return (ULONG)m_refCount;

190 }

191

192 ULONG decklink_input_callback::Release(void)

193 {

194 pthread_mutex_lock(&m_mutex);

195 m_refCount--;

196 pthread_mutex_unlock(&m_mutex);

197

198 if (m_refCount == 0) {

199 delete this;

200 return 0;

201 }

202

203 return (ULONG)m_refCount;

204 }

205

206 HRESULT decklink_input_callback::VideoInputFrameArrived(

207 IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)

208 {

209 void *frameBytes;

210 void *audioFrameBytes;

211 BMDTimeValue frameTime;

212 BMDTimeValue frameDuration;

213

214 ctx->frameCount++;

215

216 // Handle Video Frame

217 if (videoFrame) {

218 AVPacket pkt;

219 AVCodecContext *c;

220 av_init_packet(&pkt);

221 c = ctx->video_st->codec;

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

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

224 av_log(avctx, AV_LOG_DEBUG,

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

226 ctx->frameCount,

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

228 (double)qsize / 1024 / 1024);

229 }

230

231 videoFrame->GetBytes(&frameBytes);

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

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

234

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

236 if (videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {

237 unsigned bars[8] = {

238 0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,

239 0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };

240 int width = videoFrame->GetWidth();

241 int height = videoFrame->GetHeight();

242 unsigned *p = (unsigned *)frameBytes;

243

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

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

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

247 }

248 }

249

250 if (!no_video) {

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

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

253 }

254 no_video = 1;

255 } else {

256 if (no_video) {

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

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

259 }

260 no_video = 0;

261 }

262

263 pkt.pts = frameTime / ctx->video_st->time_base.num;

264

265 if (initial_video_pts == AV_NOPTS_VALUE) {

266 initial_video_pts = pkt.pts;

267 }

268

269 pkt.pts -= initial_video_pts;

270 pkt.dts = pkt.pts;

271

272 pkt.duration = frameDuration;

273 //To be made sure it still applies

274 pkt.flags |= AV_PKT_FLAG_KEY;

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

276 pkt.data = (uint8_t *)frameBytes;

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

278 videoFrame->GetHeight();

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

280 c->frame_number++;

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

282 ++ctx->dropped;

283 }

284 }

285

286 // Handle Audio Frame

287 if (audioFrame) {

288 AVCodecContext *c;

289 AVPacket pkt;

290 BMDTimeValue audio_pts;

291 av_init_packet(&pkt);

292

293 c = ctx->audio_st->codec;

294 //hack among hacks

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

296 audioFrame->GetBytes(&audioFrameBytes);

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

298 pkt.pts = audio_pts / ctx->audio_st->time_base.num;

299

300 if (initial_audio_pts == AV_NOPTS_VALUE) {

301 initial_audio_pts = pkt.pts;

302 }

303

304 pkt.pts -= initial_audio_pts;

305 pkt.dts = pkt.pts;

306

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

308 pkt.flags |= AV_PKT_FLAG_KEY;

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

310 pkt.data = (uint8_t *)audioFrameBytes;

311

312 c->frame_number++;

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

314 ++ctx->dropped;

315 }

316 }

317

318 return S_OK;

319 }

320

321 HRESULT decklink_input_callback::VideoInputFormatChanged(

322 BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,

323 BMDDetectedVideoInputFormatFlags)

324 {

325 return S_OK;

326 }

327

328 static HRESULT decklink_start_input(AVFormatContext *avctx)

329 {

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

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

332

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

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

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

336 }

337

338 extern "C" {

339

340 av_cold int ff_decklink_read_close(AVFormatContext *avctx)

341 {

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

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

344

345 if (ctx->capture_started) {

346 ctx->dli->StopStreams();

347 ctx->dli->DisableVideoInput();

348 ctx->dli->DisableAudioInput();

349 }

350

351 if (ctx->dli)

352 ctx->dli->Release();

353 if (ctx->dl)

354 ctx->dl->Release();

355

356 avpacket_queue_end(&ctx->queue);

357

358 av_freep(&cctx->ctx);

359

360 return 0;

361 }

362

363 av_cold int ff_decklink_read_header(AVFormatContext *avctx)

364 {

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

366 struct decklink_ctx *ctx;

367 IDeckLinkDisplayModeIterator *itermode;

368 IDeckLinkIterator *iter;

369 IDeckLink *dl = NULL;

370 AVStream *st;

371 HRESULT result;

372 char fname[1024];

373 char *tmp;

374 int mode_num = 0;

375

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

377 if (!ctx)

378 return AVERROR(ENOMEM);

379 ctx->list_devices = cctx->list_devices;

380 ctx->list_formats = cctx->list_formats;

381 ctx->preroll = cctx->preroll;

382 cctx->ctx = ctx;

383

384 iter = CreateDeckLinkIteratorInstance();

385 if (!iter) {

386 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");

387 return AVERROR(EIO);

388 }

389

390 /* List available devices. */

391 if (ctx->list_devices) {

392 ff_decklink_list_devices(avctx);

393 return AVERROR_EXIT;

394 }

395

396 strcpy (fname, avctx->filename);

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

398 if (tmp != NULL) {

399 mode_num = atoi (tmp+1);

400 *tmp = 0;

401 }

402

403 /* Open device. */

404 while (iter->Next(&dl) == S_OK) {

405 const char *displayName;

406 ff_decklink_get_display_name(dl, &displayName);

407 if (!strcmp(fname, displayName)) {

408 av_free((void *) displayName);

409 ctx->dl = dl;

410 break;

411 }

412 av_free((void *) displayName);

413 dl->Release();

414 }

415 iter->Release();

416 if (!ctx->dl) {

417 av_log(avctx, AV_LOG_ERROR, "Could not open '%s'\n", fname);

418 return AVERROR(EIO);

419 }

420

421 /* Get input device. */

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

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

424 avctx->filename);

425 ctx->dl->Release();

426 return AVERROR(EIO);

427 }

428

429 /* List supported formats. */

430 if (ctx->list_formats) {

431 ff_decklink_list_formats(avctx, DIRECTION_IN);

432 ctx->dli->Release();

433 ctx->dl->Release();

434 return AVERROR_EXIT;

435 }

436

437 if (ctx->dli->GetDisplayModeIterator(&itermode) != S_OK) {

438 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");

439 ctx->dl->Release();

440 return AVERROR(EIO);

441 }

442

443 if (mode_num > 0) {

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

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

446 goto error;

447 }

448 }

449

450 itermode->Release();

451

452 /* Setup streams. */

453 st = avformat_new_stream(avctx, NULL);

454 if (!st) {

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

456 goto error;

457 }

458 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

459 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;

460 st->codec->sample_rate = bmdAudioSampleRate48kHz;

461 st->codec->channels = 2;

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

463 ctx->audio_st=st;

464

465 st = avformat_new_stream(avctx, NULL);

466 if (!st) {

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

468 goto error;

469 }

470 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

471 st->codec->width = ctx->bmd_width;

472 st->codec->height = ctx->bmd_height;

473

474 st->codec->time_base.den = ctx->bmd_tb_den;

475 st->codec->time_base.num = ctx->bmd_tb_num;

476 st->codec->bit_rate = avpicture_get_size(st->codec->pix_fmt, ctx->bmd_width, ctx->bmd_height) * 1/av_q2d(st->codec->time_base) * 8;

477

478 if (cctx->v210) {

479 st->codec->codec_id = AV_CODEC_ID_V210;

480 st->codec->codec_tag = MKTAG('V', '2', '1', '0');

481 } else {

482 st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;

483 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;

484 st->codec->codec_tag = MKTAG('U', 'Y', 'V', 'Y');

485 }

486

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

488

489 ctx->video_st=st;

490

491 result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, 2);

492

493 if (result != S_OK) {

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

495 goto error;

496 }

497

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

499 cctx->v210 ? bmdFormat10BitYUV : bmdFormat8BitYUV,

500 bmdVideoInputFlagDefault);

501

502 if (result != S_OK) {

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

504 goto error;

505 }

506

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

508

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

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

511 goto error;

512 }

513

514 return 0;

515

516 error:

517

518 ctx->dli->Release();

519 ctx->dl->Release();

520

521 return AVERROR(EIO);

522 }

523

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

525 {

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

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

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

529

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

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

532 frame->interlaced_frame = 1;

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

534 frame->top_field_first = 1;

535 }

536 }

537

538 return 0;

539 }

540

541 } /* extern "C" */

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