[Processing] Relax downsample buffer size requirement
AFAICT, it is sufficient that the sample buffer has space for half the source width/height. With the current sample buffer size, this enables its use for resolutions up to 3840x2176.
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@ -149,7 +149,7 @@ EResult CDownsampling::Process (int32_t iType, SPixMap* pSrcPixMap, SPixMap* pDs
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if (iSrcWidthY <= iDstWidthY || iSrcHeightY <= iDstHeightY) {
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return RET_INVALIDPARAM;
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}
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if (iSrcWidthY > MAX_SAMPLE_WIDTH || iSrcHeightY > MAX_SAMPLE_HEIGHT || m_bNoSampleBuffer) {
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if ((iSrcWidthY >> 1) > MAX_SAMPLE_WIDTH || (iSrcHeightY >> 1) > MAX_SAMPLE_HEIGHT || m_bNoSampleBuffer) {
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if ((iSrcWidthY >> 1) == iDstWidthY && (iSrcHeightY >> 1) == iDstHeightY) {
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// use half average functions
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DownsampleHalfAverage ((uint8_t*)pDstPixMap->pPixel[0], pDstPixMap->iStride[0],
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