| 1 | /* |
| 2 | * Blackmagic DeckLink output |
| 3 | * Copyright (c) 2013-2014 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 <DeckLinkAPI.h> |
| 23 | |
| 24 | #include <pthread.h> |
| 25 | #include <semaphore.h> |
| 26 | |
| 27 | extern "C" { |
| 28 | #include "libavformat/avformat.h" |
| 29 | #include "libavformat/internal.h" |
| 30 | #include "libavutil/imgutils.h" |
| 31 | } |
| 32 | |
| 33 | #include "decklink_common.h" |
| 34 | #include "decklink_dec.h" |
| 35 | |
| 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 | } |
| 43 | |
| 44 | static void avpacket_queue_flush(AVPacketQueue *q) |
| 45 | { |
| 46 | AVPacketList *pkt, *pkt1; |
| 47 | |
| 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 | } |
| 60 | |
| 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 | } |
| 67 | |
| 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 | } |
| 76 | |
| 77 | static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt) |
| 78 | { |
| 79 | AVPacketList *pkt1; |
| 80 | |
| 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 | } |
| 90 | |
| 91 | pkt1 = (AVPacketList *)av_malloc(sizeof(AVPacketList)); |
| 92 | if (!pkt1) { |
| 93 | return -1; |
| 94 | } |
| 95 | pkt1->pkt = *pkt; |
| 96 | pkt1->next = NULL; |
| 97 | |
| 98 | pthread_mutex_lock(&q->mutex); |
| 99 | |
| 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 | unsigned bars[8] = { |
| 237 | 0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035, |
| 238 | 0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 }; |
| 239 | int width = videoFrame->GetWidth(); |
| 240 | int height = videoFrame->GetHeight(); |
| 241 | unsigned *p = (unsigned *)frameBytes; |
| 242 | |
| 243 | for (int y = 0; y < height; y++) { |
| 244 | for (int x = 0; x < width; x += 2) |
| 245 | *p++ = bars[(x * 8) / width]; |
| 246 | } |
| 247 | |
| 248 | if (!no_video) { |
| 249 | av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected " |
| 250 | "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped); |
| 251 | } |
| 252 | no_video = 1; |
| 253 | } else { |
| 254 | if (no_video) { |
| 255 | av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned " |
| 256 | "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped); |
| 257 | } |
| 258 | no_video = 0; |
| 259 | } |
| 260 | |
| 261 | pkt.pts = frameTime / ctx->video_st->time_base.num; |
| 262 | |
| 263 | if (initial_video_pts == AV_NOPTS_VALUE) { |
| 264 | initial_video_pts = pkt.pts; |
| 265 | } |
| 266 | |
| 267 | pkt.pts -= initial_video_pts; |
| 268 | pkt.dts = pkt.pts; |
| 269 | |
| 270 | pkt.duration = frameDuration; |
| 271 | //To be made sure it still applies |
| 272 | pkt.flags |= AV_PKT_FLAG_KEY; |
| 273 | pkt.stream_index = ctx->video_st->index; |
| 274 | pkt.data = (uint8_t *)frameBytes; |
| 275 | pkt.size = videoFrame->GetRowBytes() * |
| 276 | videoFrame->GetHeight(); |
| 277 | //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts); |
| 278 | c->frame_number++; |
| 279 | if (avpacket_queue_put(&ctx->queue, &pkt) < 0) { |
| 280 | ++ctx->dropped; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | // Handle Audio Frame |
| 285 | if (audioFrame) { |
| 286 | AVCodecContext *c; |
| 287 | AVPacket pkt; |
| 288 | BMDTimeValue audio_pts; |
| 289 | av_init_packet(&pkt); |
| 290 | |
| 291 | c = ctx->audio_st->codec; |
| 292 | //hack among hacks |
| 293 | pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codec->channels * (16 / 8); |
| 294 | audioFrame->GetBytes(&audioFrameBytes); |
| 295 | audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den); |
| 296 | pkt.pts = audio_pts / ctx->audio_st->time_base.num; |
| 297 | |
| 298 | if (initial_audio_pts == AV_NOPTS_VALUE) { |
| 299 | initial_audio_pts = pkt.pts; |
| 300 | } |
| 301 | |
| 302 | pkt.pts -= initial_audio_pts; |
| 303 | pkt.dts = pkt.pts; |
| 304 | |
| 305 | //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts); |
| 306 | pkt.flags |= AV_PKT_FLAG_KEY; |
| 307 | pkt.stream_index = ctx->audio_st->index; |
| 308 | pkt.data = (uint8_t *)audioFrameBytes; |
| 309 | |
| 310 | c->frame_number++; |
| 311 | if (avpacket_queue_put(&ctx->queue, &pkt) < 0) { |
| 312 | ++ctx->dropped; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | return S_OK; |
| 317 | } |
| 318 | |
| 319 | HRESULT decklink_input_callback::VideoInputFormatChanged( |
| 320 | BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode, |
| 321 | BMDDetectedVideoInputFormatFlags) |
| 322 | { |
| 323 | return S_OK; |
| 324 | } |
| 325 | |
| 326 | static HRESULT decklink_start_input(AVFormatContext *avctx) |
| 327 | { |
| 328 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 329 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 330 | |
| 331 | ctx->input_callback = new decklink_input_callback(avctx); |
| 332 | ctx->dli->SetCallback(ctx->input_callback); |
| 333 | return ctx->dli->StartStreams(); |
| 334 | } |
| 335 | |
| 336 | extern "C" { |
| 337 | |
| 338 | av_cold int ff_decklink_read_close(AVFormatContext *avctx) |
| 339 | { |
| 340 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 341 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 342 | |
| 343 | if (ctx->capture_started) { |
| 344 | ctx->dli->StopStreams(); |
| 345 | ctx->dli->DisableVideoInput(); |
| 346 | ctx->dli->DisableAudioInput(); |
| 347 | } |
| 348 | |
| 349 | if (ctx->dli) |
| 350 | ctx->dli->Release(); |
| 351 | if (ctx->dl) |
| 352 | ctx->dl->Release(); |
| 353 | |
| 354 | avpacket_queue_end(&ctx->queue); |
| 355 | |
| 356 | av_freep(&cctx->ctx); |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | av_cold int ff_decklink_read_header(AVFormatContext *avctx) |
| 362 | { |
| 363 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 364 | struct decklink_ctx *ctx; |
| 365 | IDeckLinkDisplayModeIterator *itermode; |
| 366 | IDeckLinkIterator *iter; |
| 367 | IDeckLink *dl = NULL; |
| 368 | AVStream *st; |
| 369 | HRESULT result; |
| 370 | char fname[1024]; |
| 371 | char *tmp; |
| 372 | int mode_num = 0; |
| 373 | |
| 374 | ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx)); |
| 375 | if (!ctx) |
| 376 | return AVERROR(ENOMEM); |
| 377 | ctx->list_devices = cctx->list_devices; |
| 378 | ctx->list_formats = cctx->list_formats; |
| 379 | ctx->preroll = cctx->preroll; |
| 380 | cctx->ctx = ctx; |
| 381 | |
| 382 | iter = CreateDeckLinkIteratorInstance(); |
| 383 | if (!iter) { |
| 384 | av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n"); |
| 385 | return AVERROR(EIO); |
| 386 | } |
| 387 | |
| 388 | /* List available devices. */ |
| 389 | if (ctx->list_devices) { |
| 390 | ff_decklink_list_devices(avctx); |
| 391 | return AVERROR_EXIT; |
| 392 | } |
| 393 | |
| 394 | strcpy (fname, avctx->filename); |
| 395 | tmp=strchr (fname, '@'); |
| 396 | if (tmp != NULL) { |
| 397 | mode_num = atoi (tmp+1); |
| 398 | *tmp = 0; |
| 399 | } |
| 400 | |
| 401 | /* Open device. */ |
| 402 | while (iter->Next(&dl) == S_OK) { |
| 403 | const char *displayName; |
| 404 | ff_decklink_get_display_name(dl, &displayName); |
| 405 | if (!strcmp(fname, displayName)) { |
| 406 | av_free((void *) displayName); |
| 407 | ctx->dl = dl; |
| 408 | break; |
| 409 | } |
| 410 | av_free((void *) displayName); |
| 411 | dl->Release(); |
| 412 | } |
| 413 | iter->Release(); |
| 414 | if (!ctx->dl) { |
| 415 | av_log(avctx, AV_LOG_ERROR, "Could not open '%s'\n", fname); |
| 416 | return AVERROR(EIO); |
| 417 | } |
| 418 | |
| 419 | /* Get input device. */ |
| 420 | if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) { |
| 421 | av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n", |
| 422 | avctx->filename); |
| 423 | ctx->dl->Release(); |
| 424 | return AVERROR(EIO); |
| 425 | } |
| 426 | |
| 427 | /* List supported formats. */ |
| 428 | if (ctx->list_formats) { |
| 429 | ff_decklink_list_formats(avctx, DIRECTION_IN); |
| 430 | ctx->dli->Release(); |
| 431 | ctx->dl->Release(); |
| 432 | return AVERROR_EXIT; |
| 433 | } |
| 434 | |
| 435 | if (ctx->dli->GetDisplayModeIterator(&itermode) != S_OK) { |
| 436 | av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n"); |
| 437 | ctx->dl->Release(); |
| 438 | return AVERROR(EIO); |
| 439 | } |
| 440 | |
| 441 | if (mode_num > 0) { |
| 442 | if (ff_decklink_set_format(avctx, DIRECTION_IN, mode_num) < 0) { |
| 443 | av_log(avctx, AV_LOG_ERROR, "Could not set mode %d for %s\n", mode_num, fname); |
| 444 | goto error; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | itermode->Release(); |
| 449 | |
| 450 | /* Setup streams. */ |
| 451 | st = avformat_new_stream(avctx, NULL); |
| 452 | if (!st) { |
| 453 | av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
| 454 | goto error; |
| 455 | } |
| 456 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 457 | st->codec->codec_id = AV_CODEC_ID_PCM_S16LE; |
| 458 | st->codec->sample_rate = bmdAudioSampleRate48kHz; |
| 459 | st->codec->channels = 2; |
| 460 | avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
| 461 | ctx->audio_st=st; |
| 462 | |
| 463 | st = avformat_new_stream(avctx, NULL); |
| 464 | if (!st) { |
| 465 | av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
| 466 | goto error; |
| 467 | } |
| 468 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 469 | st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
| 470 | st->codec->width = ctx->bmd_width; |
| 471 | st->codec->height = ctx->bmd_height; |
| 472 | |
| 473 | st->codec->pix_fmt = AV_PIX_FMT_UYVY422; |
| 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 | st->codec->codec_tag = MKTAG('U', 'Y', 'V', 'Y'); |
| 478 | |
| 479 | avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
| 480 | |
| 481 | ctx->video_st=st; |
| 482 | |
| 483 | result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, 2); |
| 484 | |
| 485 | if (result != S_OK) { |
| 486 | av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n"); |
| 487 | goto error; |
| 488 | } |
| 489 | |
| 490 | result = ctx->dli->EnableVideoInput(ctx->bmd_mode, bmdFormat8BitYUV, bmdVideoInputFlagDefault); |
| 491 | |
| 492 | if (result != S_OK) { |
| 493 | av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n"); |
| 494 | goto error; |
| 495 | } |
| 496 | |
| 497 | avpacket_queue_init (avctx, &ctx->queue); |
| 498 | |
| 499 | if (decklink_start_input (avctx) != S_OK) { |
| 500 | av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n"); |
| 501 | goto error; |
| 502 | } |
| 503 | |
| 504 | return 0; |
| 505 | |
| 506 | error: |
| 507 | |
| 508 | ctx->dli->Release(); |
| 509 | ctx->dl->Release(); |
| 510 | |
| 511 | return AVERROR(EIO); |
| 512 | } |
| 513 | |
| 514 | int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt) |
| 515 | { |
| 516 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 517 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 518 | AVFrame *frame = ctx->video_st->codec->coded_frame; |
| 519 | |
| 520 | avpacket_queue_get(&ctx->queue, pkt, 1); |
| 521 | if (frame && (ctx->bmd_field_dominance == bmdUpperFieldFirst || ctx->bmd_field_dominance == bmdLowerFieldFirst)) { |
| 522 | frame->interlaced_frame = 1; |
| 523 | if (ctx->bmd_field_dominance == bmdUpperFieldFirst) { |
| 524 | frame->top_field_first = 1; |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | } /* extern "C" */ |