void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex, int lastInLumBuf, int lastInChrBuf) { const int dstH= c->dstH; const int flags= c->flags; int16_t **lumPixBuf= c->lumPixBuf; int16_t **chrUPixBuf= c->chrUPixBuf; int16_t **alpPixBuf= c->alpPixBuf; const int vLumBufSize= c->vLumBufSize; const int vChrBufSize= c->vChrBufSize; int16_t *vLumFilterPos= c->vLumFilterPos; int16_t *vChrFilterPos= c->vChrFilterPos; int16_t *vLumFilter= c->vLumFilter; int16_t *vChrFilter= c->vChrFilter; int32_t *lumMmxFilter= c->lumMmxFilter; int32_t *chrMmxFilter= c->chrMmxFilter; int32_t av_unused *alpMmxFilter= c->alpMmxFilter; const int vLumFilterSize= c->vLumFilterSize; const int vChrFilterSize= c->vChrFilterSize; const int chrDstY= dstY>>c->chrDstVSubSample; const int firstLumSrcY= vLumFilterPos[dstY]; //First line needed as input const int firstChrSrcY= vChrFilterPos[chrDstY]; //First line needed as input c->blueDither= ff_dither8[dstY&1]; if (c->dstFormat == PIX_FMT_RGB555 || c->dstFormat == PIX_FMT_BGR555) c->greenDither= ff_dither8[dstY&1]; else c->greenDither= ff_dither4[dstY&1]; c->redDither= ff_dither8[(dstY+1)&1]; if (dstY < dstH - 2) { const int16_t **lumSrcPtr= (const int16_t **) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize; const int16_t **chrUSrcPtr= (const int16_t **) chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize; const int16_t **alpSrcPtr= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? (const int16_t **) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL; int i; if (flags & SWS_ACCURATE_RND) { int s= APCK_SIZE / 8; for (i=0; i<vLumFilterSize; i+=2) { *(const void**)&lumMmxFilter[s*i ]= lumSrcPtr[i ]; *(const void**)&lumMmxFilter[s*i+APCK_PTR2/4 ]= lumSrcPtr[i+(vLumFilterSize>1)]; lumMmxFilter[s*i+APCK_COEF/4 ]= lumMmxFilter[s*i+APCK_COEF/4+1]= vLumFilter[dstY*vLumFilterSize + i ] + (vLumFilterSize>1 ? vLumFilter[dstY*vLumFilterSize + i + 1]<<16 : 0); if (CONFIG_SWSCALE_ALPHA && alpPixBuf) { *(const void**)&alpMmxFilter[s*i ]= alpSrcPtr[i ]; *(const void**)&alpMmxFilter[s*i+APCK_PTR2/4 ]= alpSrcPtr[i+(vLumFilterSize>1)]; alpMmxFilter[s*i+APCK_COEF/4 ]= alpMmxFilter[s*i+APCK_COEF/4+1]= lumMmxFilter[s*i+APCK_COEF/4 ]; for (i=0; i<vChrFilterSize; i+=2) { *(const void**)&chrMmxFilter[s*i ]= chrUSrcPtr[i ]; *(const void**)&chrMmxFilter[s*i+APCK_PTR2/4 ]= chrUSrcPtr[i+(vChrFilterSize>1)]; chrMmxFilter[s*i+APCK_COEF/4 ]= chrMmxFilter[s*i+APCK_COEF/4+1]= vChrFilter[chrDstY*vChrFilterSize + i ] + (vChrFilterSize>1 ? vChrFilter[chrDstY*vChrFilterSize + i + 1]<<16 : 0); } else { for (i=0; i<vLumFilterSize; i++) { *(const void**)&lumMmxFilter[4*i+0]= lumSrcPtr[i]; lumMmxFilter[4*i+2]= lumMmxFilter[4*i+3]= ((uint16_t)vLumFilter[dstY*vLumFilterSize + i])*0x10001; if (CONFIG_SWSCALE_ALPHA && alpPixBuf) { *(const void**)&alpMmxFilter[4*i+0]= alpSrcPtr[i]; alpMmxFilter[4*i+2]= alpMmxFilter[4*i+3]= lumMmxFilter[4*i+2]; for (i=0; i<vChrFilterSize; i++) { *(const void**)&chrMmxFilter[4*i+0]= chrUSrcPtr[i]; chrMmxFilter[4*i+2]= chrMmxFilter[4*i+3]= ((uint16_t)vChrFilter[chrDstY*vChrFilterSize + i])*0x10001;