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| author | Sven Hesse | 2010-09-30 15:03:51 +0000 |
|---|---|---|
| committer | Sven Hesse | 2010-09-30 15:03:51 +0000 |
| commit | 6bbfac77aff11292ec9fb538ebdc38283053e748 (patch) | |
| tree | a9f3a30127db3d62b0bf21688a4a7f8c640574b9 /graphics/video/codecs | |
| parent | ce074116969869f9d79de2b08b771c623e6377e8 (diff) | |
| download | scummvm-rg350-6bbfac77aff11292ec9fb538ebdc38283053e748.tar.gz scummvm-rg350-6bbfac77aff11292ec9fb538ebdc38283053e748.tar.bz2 scummvm-rg350-6bbfac77aff11292ec9fb538ebdc38283053e748.zip | |
VIDEO: Interpolate U and V values
svn-id: r52955
Diffstat (limited to 'graphics/video/codecs')
| -rw-r--r-- | graphics/video/codecs/indeo3.cpp | 49 |
1 files changed, 46 insertions, 3 deletions
diff --git a/graphics/video/codecs/indeo3.cpp b/graphics/video/codecs/indeo3.cpp index c4a6baba55..630ebaa81d 100644 --- a/graphics/video/codecs/indeo3.cpp +++ b/graphics/video/codecs/indeo3.cpp @@ -270,6 +270,11 @@ Surface *Indeo3Decoder::decodeImage(Common::SeekableReadStream *stream) { const byte *srcV = _cur_frame->Vbuf; byte *dest = (byte *)_surface->pixels; + const byte *srcUP = srcU; + const byte *srcVP = srcV; + const byte *srcUN = srcU + chromaWidth; + const byte *srcVN = srcV + chromaWidth; + uint32 scaleWidth = _surface->w / fWidth; uint32 scaleHeight = _surface->h / fHeight; @@ -278,9 +283,38 @@ Surface *Indeo3Decoder::decodeImage(Common::SeekableReadStream *stream) { for (uint32 sH = 0; sH < scaleHeight; sH++) { for (uint32 x = 0; x < fWidth; x++) { - const byte cY = srcY[x]; - const byte cU = srcU[x >> 2]; - const byte cV = srcV[x >> 2]; + uint32 xP = MAX<int32>((x >> 2) - 1, 0); + uint32 xN = MIN<int32>((x >> 2) + 1, chromaWidth - 1); + + byte cY = srcY[x]; + byte cU = srcU[x >> 2]; + byte cV = srcV[x >> 2]; + + if (((x % 4) == 0) && ((y % 4) == 0)) { + cU = (((uint32) cU) + ((uint32) srcUP[xP])) / 2; + cV = (((uint32) cV) + ((uint32) srcVP[xP])) / 2; + } else if (((x % 4) == 3) && ((y % 4) == 0)) { + cU = (((uint32) cU) + ((uint32) srcUP[xN])) / 2; + cV = (((uint32) cV) + ((uint32) srcVP[xN])) / 2; + } else if (((x % 4) == 0) && ((y % 4) == 3)) { + cU = (((uint32) cU) + ((uint32) srcUN[xP])) / 2; + cV = (((uint32) cV) + ((uint32) srcVN[xP])) / 2; + } else if (((x % 4) == 3) && ((y % 4) == 3)) { + cU = (((uint32) cU) + ((uint32) srcUN[xN])) / 2; + cV = (((uint32) cV) + ((uint32) srcVN[xN])) / 2; + } else if ( (x % 4) == 0) { + cU = (((uint32) cU) + ((uint32) srcU[xP])) / 2; + cV = (((uint32) cV) + ((uint32) srcV[xP])) / 2; + } else if ( (x % 4) == 3) { + cU = (((uint32) cU) + ((uint32) srcU[xN])) / 2; + cV = (((uint32) cV) + ((uint32) srcV[xN])) / 2; + } else if ( (y % 4) == 0) { + cU = (((uint32) cU) + ((uint32) srcUP[x >> 2])) / 2; + cV = (((uint32) cV) + ((uint32) srcVP[x >> 2])) / 2; + } else if ( (y % 4) == 3) { + cU = (((uint32) cU) + ((uint32) srcUN[x >> 2])) / 2; + cV = (((uint32) cV) + ((uint32) srcVN[x >> 2])) / 2; + } byte r = 0, g = 0, b = 0; YUV2RGB(cY, cU, cV, r, g, b); @@ -303,6 +337,15 @@ Surface *Indeo3Decoder::decodeImage(Common::SeekableReadStream *stream) { if ((y & 3) == 3) { srcU += chromaWidth; srcV += chromaWidth; + + if (y > 0) { + srcUP += chromaWidth; + srcVP += chromaWidth; + } + if (y < (fHeight - 4)) { + srcUN += chromaWidth; + srcVN += chromaWidth; + } } } |