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complete the encoder interface of bit rate and frame rate updating

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This commit is contained in:
sijchen
2014-01-09 09:20:35 +08:00
parent 8df056618d
commit 4999b816ab
4 changed files with 67 additions and 6 deletions
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47
codec/encoder/core/src/encoder_ext.cpp
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@@ -423,6 +423,53 @@ int32_t ParamValidationExt (void* pParam) {
return ParamValidation (pCodingParam);
}
void WelsEncoderApplyFrameRate(SWelsSvcCodingParam* pParam)
{
SDLayerParam* pLayerParam;
const float kfEpsn = 0.000001f;
const int32_t kiNumLayer = pParam->iNumDependencyLayer;
int32_t i;
const float kfMaxFrameRate = pParam->fMaxFrameRate;
float fRatio;
float fTargetOutputFrameRate;
//set input frame rate to each layer
for (i=0;i<kiNumLayer;i++) {
pLayerParam = &(pParam->sDependencyLayers[i]);
fRatio = pLayerParam->fOutputFrameRate / pLayerParam->fInputFrameRate;
if ( (kfMaxFrameRate - pLayerParam->fInputFrameRate) > kfEpsn
|| (kfMaxFrameRate - pLayerParam->fInputFrameRate) < -kfEpsn ) {
pLayerParam->fInputFrameRate = kfMaxFrameRate;
fTargetOutputFrameRate = kfMaxFrameRate*fRatio;
pLayerParam->fOutputFrameRate = (fTargetOutputFrameRate>=6)?fTargetOutputFrameRate:(pLayerParam->fInputFrameRate);
//TODO:{Sijia} from design, there is no sense to have temporal layer when under 6fps even with such setting?
}
}
}
void WelsEncoderApplyBitRate(SWelsSvcCodingParam* pParam)
{
//TODO (Sijia): this is a temporary solution which keep the ratio between layers
//but it is also possible to fulfill the bitrate of lower layer first
SDLayerParam* pLayerParam;
const int32_t iNumLayers = pParam->iNumDependencyLayer;
int32_t i, iOrigTotalBitrate=0;
//read old BR
for (i=0;i<iNumLayers;i++) {
iOrigTotalBitrate += pParam->sDependencyLayers[i].iSpatialBitrate;
}
//write new BR
float fRatio = 0.0;
for (i=0;i<iNumLayers;i++) {
pLayerParam = &(pParam->sDependencyLayers[i]);
fRatio = pLayerParam->iSpatialBitrate/(static_cast<float>(iOrigTotalBitrate));
pLayerParam->iSpatialBitrate = static_cast<int32_t>(pParam->iTargetBitrate*fRatio);
}
}
/*!
* \brief acquire count number of layers and NALs based on configurable paramters dependency
* \pParam pCtx sWelsEncCtx*