Method VideoInputFrameArrived

libavdevice/decklink_dec.cpp:759–1013

}

HRESULT decklink_input_callback::VideoInputFrameArrived(
    IDeckLinkVideoInputFrame_v14_2_1 *videoFrame, IDeckLinkAudioInputPacket *audioFrame)
{
    void *frameBytes;
    void *audioFrameBytes;
    BMDTimeValue frameTime;
    BMDTimeValue frameDuration;
    int64_t wallclock = 0, abs_wallclock = 0;
    int64_t video_pkt_pts, audio_pkt_pts;
    struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;

    if (ctx->autodetect) {
        if (videoFrame && !(videoFrame->GetFlags() & bmdFrameHasNoInputSource) &&
            ctx->bmd_mode == bmdModeUnknown)
        {
            ctx->bmd_mode = AUTODETECT_DEFAULT_MODE;
        }
        return S_OK;
    }

    // Drop the frames till system's timestamp aligns with the configured value.
    if (0 == ctx->frameCount && cctx->timestamp_align) {
        AVRational remainder = av_make_q(av_gettime() % cctx->timestamp_align, 1000000);
        AVRational frame_duration = av_inv_q(ctx->video_st->r_frame_rate);
        if (av_cmp_q(remainder, frame_duration) > 0) {
            ++ctx->dropped;
            return S_OK;
        }
    }

    ctx->frameCount++;
    if (ctx->audio_pts_source == PTS_SRC_WALLCLOCK || ctx->video_pts_source == PTS_SRC_WALLCLOCK)
        wallclock = av_gettime_relative();
    if (ctx->audio_pts_source == PTS_SRC_ABS_WALLCLOCK || ctx->video_pts_source == PTS_SRC_ABS_WALLCLOCK)
        abs_wallclock = av_gettime();
    video_pkt_pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts, cctx->copyts);
    audio_pkt_pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts, cctx->copyts);

    // Handle Video Frame
    if (videoFrame) {
        AVPacket pkt = { 0 };
        if (ctx->frameCount % 25 == 0) {
            unsigned long long qsize = ff_decklink_packet_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 (ctx->signal_loss_action == SIGNAL_LOSS_BARS && videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {
                unsigned bars[8] = {
                    0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,