| /* |
| * Blackmagic DeckLink output |
| * Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <DeckLinkAPI.h> |
| |
| #include <pthread.h> |
| #include <semaphore.h> |
| |
| extern "C" { |
| #include "config.h" |
| #include "libavformat/avformat.h" |
| #include "libavformat/internal.h" |
| #include "libavutil/imgutils.h" |
| #if CONFIG_LIBZVBI |
| #include <libzvbi.h> |
| #endif |
| } |
| |
| #include "decklink_common.h" |
| #include "decklink_dec.h" |
| |
| #if CONFIG_LIBZVBI |
| static uint8_t calc_parity_and_line_offset(int line) |
| { |
| uint8_t ret = (line < 313) << 5; |
| if (line >= 7 && line <= 22) |
| ret += line; |
| if (line >= 320 && line <= 335) |
| ret += (line - 313); |
| return ret; |
| } |
| |
| int teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt) |
| { |
| vbi_bit_slicer slicer; |
| |
| vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, VBI_PIXFMT_UYVY); |
| |
| if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE) |
| return -1; |
| |
| tgt[0] = 0x02; // data_unit_id |
| tgt[1] = 0x2c; // data_unit_length |
| tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset |
| tgt[3] = 0xe4; // framing code |
| |
| return 0; |
| } |
| #endif |
| |
| static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q) |
| { |
| memset(q, 0, sizeof(AVPacketQueue)); |
| pthread_mutex_init(&q->mutex, NULL); |
| pthread_cond_init(&q->cond, NULL); |
| q->avctx = avctx; |
| } |
| |
| static void avpacket_queue_flush(AVPacketQueue *q) |
| { |
| AVPacketList *pkt, *pkt1; |
| |
| pthread_mutex_lock(&q->mutex); |
| for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) { |
| pkt1 = pkt->next; |
| av_packet_unref(&pkt->pkt); |
| av_freep(&pkt); |
| } |
| q->last_pkt = NULL; |
| q->first_pkt = NULL; |
| q->nb_packets = 0; |
| q->size = 0; |
| pthread_mutex_unlock(&q->mutex); |
| } |
| |
| static void avpacket_queue_end(AVPacketQueue *q) |
| { |
| avpacket_queue_flush(q); |
| pthread_mutex_destroy(&q->mutex); |
| pthread_cond_destroy(&q->cond); |
| } |
| |
| static unsigned long long avpacket_queue_size(AVPacketQueue *q) |
| { |
| unsigned long long size; |
| pthread_mutex_lock(&q->mutex); |
| size = q->size; |
| pthread_mutex_unlock(&q->mutex); |
| return size; |
| } |
| |
| static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt) |
| { |
| AVPacketList *pkt1; |
| |
| // Drop Packet if queue size is > 1GB |
| if (avpacket_queue_size(q) > 1024 * 1024 * 1024 ) { |
| av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n"); |
| return -1; |
| } |
| /* duplicate the packet */ |
| if (av_dup_packet(pkt) < 0) { |
| return -1; |
| } |
| |
| pkt1 = (AVPacketList *)av_malloc(sizeof(AVPacketList)); |
| if (!pkt1) { |
| return -1; |
| } |
| pkt1->pkt = *pkt; |
| pkt1->next = NULL; |
| |
| pthread_mutex_lock(&q->mutex); |
| |
| if (!q->last_pkt) { |
| q->first_pkt = pkt1; |
| } else { |
| q->last_pkt->next = pkt1; |
| } |
| |
| q->last_pkt = pkt1; |
| q->nb_packets++; |
| q->size += pkt1->pkt.size + sizeof(*pkt1); |
| |
| pthread_cond_signal(&q->cond); |
| |
| pthread_mutex_unlock(&q->mutex); |
| return 0; |
| } |
| |
| static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block) |
| { |
| AVPacketList *pkt1; |
| int ret; |
| |
| pthread_mutex_lock(&q->mutex); |
| |
| for (;; ) { |
| pkt1 = q->first_pkt; |
| if (pkt1) { |
| q->first_pkt = pkt1->next; |
| if (!q->first_pkt) { |
| q->last_pkt = NULL; |
| } |
| q->nb_packets--; |
| q->size -= pkt1->pkt.size + sizeof(*pkt1); |
| *pkt = pkt1->pkt; |
| av_free(pkt1); |
| ret = 1; |
| break; |
| } else if (!block) { |
| ret = 0; |
| break; |
| } else { |
| pthread_cond_wait(&q->cond, &q->mutex); |
| } |
| } |
| pthread_mutex_unlock(&q->mutex); |
| return ret; |
| } |
| |
| class decklink_input_callback : public IDeckLinkInputCallback |
| { |
| public: |
| decklink_input_callback(AVFormatContext *_avctx); |
| ~decklink_input_callback(); |
| |
| virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; } |
| virtual ULONG STDMETHODCALLTYPE AddRef(void); |
| virtual ULONG STDMETHODCALLTYPE Release(void); |
| virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags); |
| virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*); |
| |
| private: |
| ULONG m_refCount; |
| pthread_mutex_t m_mutex; |
| AVFormatContext *avctx; |
| decklink_ctx *ctx; |
| int no_video; |
| int64_t initial_video_pts; |
| int64_t initial_audio_pts; |
| }; |
| |
| decklink_input_callback::decklink_input_callback(AVFormatContext *_avctx) : m_refCount(0) |
| { |
| avctx = _avctx; |
| decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| ctx = (struct decklink_ctx *) cctx->ctx; |
| initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE; |
| pthread_mutex_init(&m_mutex, NULL); |
| } |
| |
| decklink_input_callback::~decklink_input_callback() |
| { |
| pthread_mutex_destroy(&m_mutex); |
| } |
| |
| ULONG decklink_input_callback::AddRef(void) |
| { |
| pthread_mutex_lock(&m_mutex); |
| m_refCount++; |
| pthread_mutex_unlock(&m_mutex); |
| |
| return (ULONG)m_refCount; |
| } |
| |
| ULONG decklink_input_callback::Release(void) |
| { |
| pthread_mutex_lock(&m_mutex); |
| m_refCount--; |
| pthread_mutex_unlock(&m_mutex); |
| |
| if (m_refCount == 0) { |
| delete this; |
| return 0; |
| } |
| |
| return (ULONG)m_refCount; |
| } |
| |
| HRESULT decklink_input_callback::VideoInputFrameArrived( |
| IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame) |
| { |
| void *frameBytes; |
| void *audioFrameBytes; |
| BMDTimeValue frameTime; |
| BMDTimeValue frameDuration; |
| |
| ctx->frameCount++; |
| |
| // Handle Video Frame |
| if (videoFrame) { |
| AVPacket pkt; |
| AVCodecContext *c; |
| av_init_packet(&pkt); |
| c = ctx->video_st->codec; |
| if (ctx->frameCount % 25 == 0) { |
| unsigned long long qsize = avpacket_queue_size(&ctx->queue); |
| av_log(avctx, AV_LOG_DEBUG, |
| "Frame received (#%lu) - Valid (%liB) - QSize %fMB\n", |
| ctx->frameCount, |
| videoFrame->GetRowBytes() * videoFrame->GetHeight(), |
| (double)qsize / 1024 / 1024); |
| } |
| |
| videoFrame->GetBytes(&frameBytes); |
| videoFrame->GetStreamTime(&frameTime, &frameDuration, |
| ctx->video_st->time_base.den); |
| |
| if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) { |
| if (videoFrame->GetPixelFormat() == bmdFormat8BitYUV) { |
| unsigned bars[8] = { |
| 0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035, |
| 0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 }; |
| int width = videoFrame->GetWidth(); |
| int height = videoFrame->GetHeight(); |
| unsigned *p = (unsigned *)frameBytes; |
| |
| for (int y = 0; y < height; y++) { |
| for (int x = 0; x < width; x += 2) |
| *p++ = bars[(x * 8) / width]; |
| } |
| } |
| |
| if (!no_video) { |
| av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected " |
| "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped); |
| } |
| no_video = 1; |
| } else { |
| if (no_video) { |
| av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned " |
| "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped); |
| } |
| no_video = 0; |
| } |
| |
| pkt.pts = frameTime / ctx->video_st->time_base.num; |
| |
| if (initial_video_pts == AV_NOPTS_VALUE) { |
| initial_video_pts = pkt.pts; |
| } |
| |
| pkt.pts -= initial_video_pts; |
| pkt.dts = pkt.pts; |
| |
| pkt.duration = frameDuration; |
| //To be made sure it still applies |
| pkt.flags |= AV_PKT_FLAG_KEY; |
| pkt.stream_index = ctx->video_st->index; |
| pkt.data = (uint8_t *)frameBytes; |
| pkt.size = videoFrame->GetRowBytes() * |
| videoFrame->GetHeight(); |
| //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts); |
| |
| #if CONFIG_LIBZVBI |
| if (!no_video && ctx->teletext_lines && videoFrame->GetPixelFormat() == bmdFormat8BitYUV && videoFrame->GetWidth() == 720) { |
| IDeckLinkVideoFrameAncillary *vanc; |
| AVPacket txt_pkt; |
| uint8_t txt_buf0[1611]; // max 35 * 46 bytes decoded teletext lines + 1 byte data_identifier |
| uint8_t *txt_buf = txt_buf0; |
| |
| if (videoFrame->GetAncillaryData(&vanc) == S_OK) { |
| int i; |
| int64_t line_mask = 1; |
| txt_buf[0] = 0x10; // data_identifier - EBU_data |
| txt_buf++; |
| for (i = 6; i < 336; i++, line_mask <<= 1) { |
| uint8_t *buf; |
| if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) { |
| if (teletext_data_unit_from_vbi_data(i, buf, txt_buf) >= 0) |
| txt_buf += 46; |
| } |
| if (i == 22) |
| i = 317; |
| } |
| vanc->Release(); |
| if (txt_buf - txt_buf0 > 1) { |
| int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4; |
| while (stuffing_units--) { |
| memset(txt_buf, 0xff, 46); |
| txt_buf[1] = 0x2c; // data_unit_length |
| txt_buf += 46; |
| } |
| av_init_packet(&txt_pkt); |
| txt_pkt.pts = pkt.pts; |
| txt_pkt.dts = pkt.dts; |
| txt_pkt.stream_index = ctx->teletext_st->index; |
| txt_pkt.data = txt_buf0; |
| txt_pkt.size = txt_buf - txt_buf0; |
| if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) { |
| ++ctx->dropped; |
| } |
| } |
| } |
| } |
| #endif |
| |
| c->frame_number++; |
| if (avpacket_queue_put(&ctx->queue, &pkt) < 0) { |
| ++ctx->dropped; |
| } |
| } |
| |
| // Handle Audio Frame |
| if (audioFrame) { |
| AVCodecContext *c; |
| AVPacket pkt; |
| BMDTimeValue audio_pts; |
| av_init_packet(&pkt); |
| |
| c = ctx->audio_st->codec; |
| //hack among hacks |
| pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codec->channels * (16 / 8); |
| audioFrame->GetBytes(&audioFrameBytes); |
| audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den); |
| pkt.pts = audio_pts / ctx->audio_st->time_base.num; |
| |
| if (initial_audio_pts == AV_NOPTS_VALUE) { |
| initial_audio_pts = pkt.pts; |
| } |
| |
| pkt.pts -= initial_audio_pts; |
| pkt.dts = pkt.pts; |
| |
| //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts); |
| pkt.flags |= AV_PKT_FLAG_KEY; |
| pkt.stream_index = ctx->audio_st->index; |
| pkt.data = (uint8_t *)audioFrameBytes; |
| |
| c->frame_number++; |
| if (avpacket_queue_put(&ctx->queue, &pkt) < 0) { |
| ++ctx->dropped; |
| } |
| } |
| |
| return S_OK; |
| } |
| |
| HRESULT decklink_input_callback::VideoInputFormatChanged( |
| BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode, |
| BMDDetectedVideoInputFormatFlags) |
| { |
| return S_OK; |
| } |
| |
| static HRESULT decklink_start_input(AVFormatContext *avctx) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| |
| ctx->input_callback = new decklink_input_callback(avctx); |
| ctx->dli->SetCallback(ctx->input_callback); |
| return ctx->dli->StartStreams(); |
| } |
| |
| extern "C" { |
| |
| av_cold int ff_decklink_read_close(AVFormatContext *avctx) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| |
| if (ctx->capture_started) { |
| ctx->dli->StopStreams(); |
| ctx->dli->DisableVideoInput(); |
| ctx->dli->DisableAudioInput(); |
| } |
| |
| if (ctx->dli) |
| ctx->dli->Release(); |
| if (ctx->dl) |
| ctx->dl->Release(); |
| |
| avpacket_queue_end(&ctx->queue); |
| |
| av_freep(&cctx->ctx); |
| |
| return 0; |
| } |
| |
| av_cold int ff_decklink_read_header(AVFormatContext *avctx) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| struct decklink_ctx *ctx; |
| IDeckLinkDisplayModeIterator *itermode; |
| IDeckLinkIterator *iter; |
| IDeckLink *dl = NULL; |
| AVStream *st; |
| HRESULT result; |
| char fname[1024]; |
| char *tmp; |
| int mode_num = 0; |
| |
| ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx)); |
| if (!ctx) |
| return AVERROR(ENOMEM); |
| ctx->list_devices = cctx->list_devices; |
| ctx->list_formats = cctx->list_formats; |
| ctx->teletext_lines = cctx->teletext_lines; |
| ctx->preroll = cctx->preroll; |
| cctx->ctx = ctx; |
| |
| #if !CONFIG_LIBZVBI |
| if (ctx->teletext_lines) { |
| av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing teletext, please recompile FFmpeg.\n"); |
| return AVERROR(ENOSYS); |
| } |
| #endif |
| |
| /* Check audio channel option for valid values: 2, 8 or 16 */ |
| switch (cctx->audio_channels) { |
| case 2: |
| case 8: |
| case 16: |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| iter = CreateDeckLinkIteratorInstance(); |
| if (!iter) { |
| av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n"); |
| return AVERROR(EIO); |
| } |
| |
| /* List available devices. */ |
| if (ctx->list_devices) { |
| ff_decklink_list_devices(avctx); |
| return AVERROR_EXIT; |
| } |
| |
| strcpy (fname, avctx->filename); |
| tmp=strchr (fname, '@'); |
| if (tmp != NULL) { |
| mode_num = atoi (tmp+1); |
| *tmp = 0; |
| } |
| |
| /* Open device. */ |
| while (iter->Next(&dl) == S_OK) { |
| const char *displayName; |
| ff_decklink_get_display_name(dl, &displayName); |
| if (!strcmp(fname, displayName)) { |
| av_free((void *) displayName); |
| ctx->dl = dl; |
| break; |
| } |
| av_free((void *) displayName); |
| dl->Release(); |
| } |
| iter->Release(); |
| if (!ctx->dl) { |
| av_log(avctx, AV_LOG_ERROR, "Could not open '%s'\n", fname); |
| return AVERROR(EIO); |
| } |
| |
| /* Get input device. */ |
| if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n", |
| avctx->filename); |
| ctx->dl->Release(); |
| return AVERROR(EIO); |
| } |
| |
| /* List supported formats. */ |
| if (ctx->list_formats) { |
| ff_decklink_list_formats(avctx, DIRECTION_IN); |
| ctx->dli->Release(); |
| ctx->dl->Release(); |
| return AVERROR_EXIT; |
| } |
| |
| if (ctx->dli->GetDisplayModeIterator(&itermode) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n"); |
| ctx->dl->Release(); |
| return AVERROR(EIO); |
| } |
| |
| if (mode_num > 0) { |
| if (ff_decklink_set_format(avctx, DIRECTION_IN, mode_num) < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Could not set mode %d for %s\n", mode_num, fname); |
| goto error; |
| } |
| } |
| |
| itermode->Release(); |
| |
| /* Setup streams. */ |
| st = avformat_new_stream(avctx, NULL); |
| if (!st) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
| goto error; |
| } |
| st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| st->codec->codec_id = AV_CODEC_ID_PCM_S16LE; |
| st->codec->sample_rate = bmdAudioSampleRate48kHz; |
| st->codec->channels = cctx->audio_channels; |
| avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
| ctx->audio_st=st; |
| |
| st = avformat_new_stream(avctx, NULL); |
| if (!st) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
| goto error; |
| } |
| st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| st->codec->width = ctx->bmd_width; |
| st->codec->height = ctx->bmd_height; |
| |
| st->codec->time_base.den = ctx->bmd_tb_den; |
| st->codec->time_base.num = ctx->bmd_tb_num; |
| st->codec->bit_rate = av_image_get_buffer_size(st->codec->pix_fmt, ctx->bmd_width, ctx->bmd_height, 1) * 1/av_q2d(st->codec->time_base) * 8; |
| |
| if (cctx->v210) { |
| st->codec->codec_id = AV_CODEC_ID_V210; |
| st->codec->codec_tag = MKTAG('V', '2', '1', '0'); |
| } else { |
| st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
| st->codec->pix_fmt = AV_PIX_FMT_UYVY422; |
| st->codec->codec_tag = MKTAG('U', 'Y', 'V', 'Y'); |
| } |
| |
| avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
| |
| ctx->video_st=st; |
| |
| if (ctx->teletext_lines) { |
| st = avformat_new_stream(avctx, NULL); |
| if (!st) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
| goto error; |
| } |
| st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| st->codec->time_base.den = ctx->bmd_tb_den; |
| st->codec->time_base.num = ctx->bmd_tb_num; |
| st->codec->codec_id = AV_CODEC_ID_DVB_TELETEXT; |
| avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
| ctx->teletext_st = st; |
| } |
| |
| av_log(avctx, AV_LOG_VERBOSE, "Using %d input audio channels\n", ctx->audio_st->codec->channels); |
| result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, ctx->audio_st->codec->channels); |
| |
| if (result != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n"); |
| goto error; |
| } |
| |
| result = ctx->dli->EnableVideoInput(ctx->bmd_mode, |
| cctx->v210 ? bmdFormat10BitYUV : bmdFormat8BitYUV, |
| bmdVideoInputFlagDefault); |
| |
| if (result != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n"); |
| goto error; |
| } |
| |
| avpacket_queue_init (avctx, &ctx->queue); |
| |
| if (decklink_start_input (avctx) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n"); |
| goto error; |
| } |
| |
| return 0; |
| |
| error: |
| |
| ctx->dli->Release(); |
| ctx->dl->Release(); |
| |
| return AVERROR(EIO); |
| } |
| |
| int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| AVFrame *frame = ctx->video_st->codec->coded_frame; |
| |
| avpacket_queue_get(&ctx->queue, pkt, 1); |
| if (frame && (ctx->bmd_field_dominance == bmdUpperFieldFirst || ctx->bmd_field_dominance == bmdLowerFieldFirst)) { |
| frame->interlaced_frame = 1; |
| if (ctx->bmd_field_dominance == bmdUpperFieldFirst) { |
| frame->top_field_first = 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| } /* extern "C" */ |