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obs-qsv: Enable B-frames and B-pyramid for encoder

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Enable B-Pyramid frames to improve quality for high motion content.
B-pyramid allows a B-frame to choose closer frames for reference which
may have higher correlation.

Adjusts packet priority to avoid dropping referable B-frames

A check has been added to ensure feature is enabled only on platforms
with MSDK API 1.8 or higher - addresses crashing issues.
This commit is contained in:
brittneysclark
2019-07-12 23:35:16 -07:00
parent 2b59b010bb
commit b675bed90b
2 changed files with 28 additions and 20 deletions
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19
plugins/obs-qsv11/QSV_Encoder_Internal.cpp
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@@ -209,6 +209,7 @@ bool QSV_Encoder_Internal::InitParams(qsv_param_t *pParams)
m_mfxEncParams.mfx.FrameInfo.CropY = 0;
m_mfxEncParams.mfx.FrameInfo.CropW = pParams->nWidth;
m_mfxEncParams.mfx.FrameInfo.CropH = pParams->nHeight;
m_mfxEncParams.mfx.GopRefDist = pParams->nbFrames + 1;
m_mfxEncParams.mfx.RateControlMethod = pParams->nRateControl;
@@ -253,23 +254,23 @@ bool QSV_Encoder_Internal::InitParams(qsv_param_t *pParams)
int iBuffers = 0;
if (pParams->nAsyncDepth == 1) {
m_mfxEncParams.mfx.NumRefFrame = 1;
// low latency, I and P frames only
m_mfxEncParams.mfx.GopRefDist = 1;
memset(&m_co, 0, sizeof(mfxExtCodingOption));
m_co.Header.BufferId = MFX_EXTBUFF_CODING_OPTION;
m_co.Header.BufferSz = sizeof(mfxExtCodingOption);
m_co.MaxDecFrameBuffering = 1;
extendedBuffers[iBuffers++] = (mfxExtBuffer *)&m_co;
} else
m_mfxEncParams.mfx.GopRefDist = pParams->nbFrames + 1;
if (pParams->nRateControl == MFX_RATECONTROL_LA_ICQ ||
pParams->nRateControl == MFX_RATECONTROL_LA) {
}
if (m_ver.Major == 1 && m_ver.Minor >= 8)
{
memset(&m_co2, 0, sizeof(mfxExtCodingOption2));
m_co2.Header.BufferId = MFX_EXTBUFF_CODING_OPTION;
m_co2.Header.BufferId = MFX_EXTBUFF_CODING_OPTION2;
m_co2.Header.BufferSz = sizeof(m_co2);
m_co2.LookAheadDepth = pParams->nLADEPTH;
if (pParams->nRateControl == MFX_RATECONTROL_LA_ICQ ||
pParams->nRateControl == MFX_RATECONTROL_LA)
m_co2.LookAheadDepth = pParams->nLADEPTH;
if (pParams->nbFrames > 1)
m_co2.BRefType = MFX_B_REF_PYRAMID;
extendedBuffers[iBuffers++] = (mfxExtBuffer *)&m_co2;
}