Method InitDecoder

decoder/LAVVideo/decoders/cuvid.cpp:630–836

}

STDMETHODIMP CDecCuvid::InitDecoder(AVCodecID codec, const CMediaType *pmt, const MediaSideDataFFMpeg *pSideData)
{
    DbgLog((LOG_TRACE, 10, L"CDecCuvid::InitDecoder(): Initializing CUVID decoder"));
    HRESULT hr = S_OK;

    if (!m_cudaContext)
    {
        DbgLog((LOG_TRACE, 10, L"-> InitDecoder called without a cuda context"));
        return E_FAIL;
    }

    // Free old device
    DestroyDecoder(false);

    // Flush Display Queue
    memset(&m_DisplayQueue, 0, sizeof(m_DisplayQueue));
    for (int i = 0; i < DISPLAY_DELAY; i++)
        m_DisplayQueue[i].picture_index = -1;
    m_DisplayPos = 0;

    m_DisplayDelay = DISPLAY_DELAY;

    // Reduce display delay for DVD decoding for lower decode latency
    if (m_pCallback->GetDecodeFlags() & LAV_VIDEO_DEC_FLAG_DVD)
        m_DisplayDelay /= 2;

    cudaVideoCodec cudaCodec = (cudaVideoCodec)-1;
    for (int i = 0; i < countof(cuda_codecs); i++)
    {
        if (cuda_codecs[i].ffcodec == codec)
        {
            cudaCodec = cuda_codecs[i].cudaCodec;
            break;
        }
    }

    if (cudaCodec == -1)
    {
        DbgLog((LOG_TRACE, 10, L"-> Codec id %d does not map to a CUVID codec", codec));
        return E_FAIL;
    }

    if (cudaCodec == cudaVideoCodec_MPEG4 && !m_bVDPAULevelC)
    {
        DbgLog((LOG_TRACE, 10, L"-> Device is not capable to decode this format (not >= Level C)"));
        return E_FAIL;
    }

    m_bUseTimestampQueue = (m_pCallback->GetDecodeFlags() & LAV_VIDEO_DEC_FLAG_ONLY_DTS) ||
                           (cudaCodec == cudaVideoCodec_MPEG4 && pmt->formattype != FORMAT_MPEG2Video) ||
                           (cudaCodec == cudaVideoCodec_VP9);
    m_bWaitForKeyframe = m_bUseTimestampQueue;
    m_bInterlaced = TRUE;
    m_bFormatIncompatible = FALSE;
    m_bTFF = TRUE;
    m_rtPrevDiff = AV_NOPTS_VALUE;
    m_bARPresent = TRUE;