swscale: remove swScale_{c,MMX,MMX2} duplication.

3 files changed, 28 insertions, 302 deletions

diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index 5b71a6f1c0..36b676bf06 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -1214,18 +1214,13 @@ SwsFunc ff_getSwsFunc(SwsContext *c)
 
     sws_init_swScale_c(c);
 
-#if HAVE_MMX2
-    // ordered per speed fastest first
-    if (cpu_flags & AV_CPU_FLAG_MMX2) {
-        sws_init_swScale_MMX2(c);
-        return swScale_MMX2;
-    } else
-#endif
 #if HAVE_MMX
-    if (cpu_flags & AV_CPU_FLAG_MMX) {
+    if (cpu_flags & AV_CPU_FLAG_MMX)
         sws_init_swScale_MMX(c);
-        return swScale_MMX;
-    } else
+#endif
+#if HAVE_MMX2
+    if (cpu_flags & AV_CPU_FLAG_MMX2)
+        sws_init_swScale_MMX2(c);
 #endif
 #if HAVE_ALTIVEC
     if (cpu_flags & AV_CPU_FLAG_ALTIVEC)
diff --git a/libswscale/swscale_template.c b/libswscale/swscale_template.c
index fe872561cb..0ff402806e 100644
--- a/libswscale/swscale_template.c
+++ b/libswscale/swscale_template.c
@@ -485,6 +485,11 @@ inline static void hcscale_c(SwsContext *c, uint16_t *dst, long dstWidth,
 #define DEBUG_SWSCALE_BUFFERS 0
 #define DEBUG_BUFFERS(...) if (DEBUG_SWSCALE_BUFFERS) av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
 
+#if HAVE_MMX
+static void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
+                                  int lastInLumBuf, int lastInChrBuf);
+#endif
+
 static int swScale_c(SwsContext *c, const uint8_t* src[], int srcStride[],
                      int srcSliceY, int srcSliceH, uint8_t* dst[], int dstStride[])
 {
@@ -656,6 +661,7 @@ static int swScale_c(SwsContext *c, const uint8_t* src[], int srcStride[],
         if (!enough_lines)
             break; //we can't output a dstY line so let's try with the next slice
 
+        if (HAVE_MMX) updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex, lastInLumBuf, lastInChrBuf);
         if (dstY < dstH-2) {
             const int16_t **lumSrcPtr= (const int16_t **) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
             const int16_t **chrSrcPtr= (const int16_t **) chrPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
@@ -780,6 +786,10 @@ static int swScale_c(SwsContext *c, const uint8_t* src[], int srcStride[],
     if ((dstFormat == PIX_FMT_YUVA420P) && !alpPixBuf)
         fillPlane(dst[3], dstStride[3], dstW, dstY-lastDstY, lastDstY, 255);
 
+    if (HAVE_MMX2 && av_get_cpu_flags() & AV_CPU_FLAG_MMX2)
+        __asm__ volatile("sfence":::"memory");
+    emms_c();
+
     /* store changed local vars back in the context */
     c->dstY= dstY;
     c->lumBufIndex= lumBufIndex;
diff --git a/libswscale/x86/swscale_template.c b/libswscale/x86/swscale_template.c
index 576e22c082..37a6bb5a0d 100644
--- a/libswscale/x86/swscale_template.c
+++ b/libswscale/x86/swscale_template.c
@@ -2144,179 +2144,29 @@ which is needed to support GCC 4.0. */
 #endif
 }
 
-#define DEBUG_SWSCALE_BUFFERS 0
-#define DEBUG_BUFFERS(...) if (DEBUG_SWSCALE_BUFFERS) av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
-
-static int RENAME(swScale)(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
-                           int srcSliceH, uint8_t* dst[], int dstStride[])
+#if !COMPILE_TEMPLATE_MMX2
+static void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
+                                  int lastInLumBuf, int lastInChrBuf)
 {
-    /* load a few things into local vars to make the code more readable? and faster */
-    const int srcW= c->srcW;
-    const int dstW= c->dstW;
     const int dstH= c->dstH;
-    const int chrDstW= c->chrDstW;
-    const int chrSrcW= c->chrSrcW;
-    const int lumXInc= c->lumXInc;
-    const int chrXInc= c->chrXInc;
-    const enum PixelFormat dstFormat= c->dstFormat;
     const int flags= c->flags;
+    int16_t **lumPixBuf= c->lumPixBuf;
+    int16_t **chrPixBuf= c->chrPixBuf;
+    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 *hLumFilterPos= c->hLumFilterPos;
-    int16_t *hChrFilterPos= c->hChrFilterPos;
     int16_t *vLumFilter= c->vLumFilter;
     int16_t *vChrFilter= c->vChrFilter;
-    int16_t *hLumFilter= c->hLumFilter;
-    int16_t *hChrFilter= c->hChrFilter;
     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 hLumFilterSize= c->hLumFilterSize;
-    const int hChrFilterSize= c->hChrFilterSize;
-    int16_t **lumPixBuf= c->lumPixBuf;
-    int16_t **chrPixBuf= c->chrPixBuf;
-    int16_t **alpPixBuf= c->alpPixBuf;
-    const int vLumBufSize= c->vLumBufSize;
-    const int vChrBufSize= c->vChrBufSize;
-    uint8_t *formatConvBuffer= c->formatConvBuffer;
-    const int chrSrcSliceY= srcSliceY >> c->chrSrcVSubSample;
-    const int chrSrcSliceH= -((-srcSliceH) >> c->chrSrcVSubSample);
-    int lastDstY;
-    uint32_t *pal=c->pal_yuv;
-
-    /* vars which will change and which we need to store back in the context */
-    int dstY= c->dstY;
-    int lumBufIndex= c->lumBufIndex;
-    int chrBufIndex= c->chrBufIndex;
-    int lastInLumBuf= c->lastInLumBuf;
-    int lastInChrBuf= c->lastInChrBuf;
-
-    if (isPacked(c->srcFormat)) {
-        src[0]=
-        src[1]=
-        src[2]=
-        src[3]= src[0];
-        srcStride[0]=
-        srcStride[1]=
-        srcStride[2]=
-        srcStride[3]= srcStride[0];
-    }
-    srcStride[1]<<= c->vChrDrop;
-    srcStride[2]<<= c->vChrDrop;
-
-    DEBUG_BUFFERS("swScale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
-                  src[0], srcStride[0], src[1], srcStride[1], src[2], srcStride[2], src[3], srcStride[3],
-                  dst[0], dstStride[0], dst[1], dstStride[1], dst[2], dstStride[2], dst[3], dstStride[3]);
-    DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
-                   srcSliceY,    srcSliceH,    dstY,    dstH);
-    DEBUG_BUFFERS("vLumFilterSize: %d vLumBufSize: %d vChrFilterSize: %d vChrBufSize: %d\n",
-                   vLumFilterSize,    vLumBufSize,    vChrFilterSize,    vChrBufSize);
-
-    if (dstStride[0]%8 !=0 || dstStride[1]%8 !=0 || dstStride[2]%8 !=0 || dstStride[3]%8 != 0) {
-        static int warnedAlready=0; //FIXME move this into the context perhaps
-        if (flags & SWS_PRINT_INFO && !warnedAlready) {
-            av_log(c, AV_LOG_WARNING, "Warning: dstStride is not aligned!\n"
-                   "         ->cannot do aligned memory accesses anymore\n");
-            warnedAlready=1;
-        }
-    }
-
-    /* Note the user might start scaling the picture in the middle so this
-       will not get executed. This is not really intended but works
-       currently, so people might do it. */
-    if (srcSliceY ==0) {
-        lumBufIndex=-1;
-        chrBufIndex=-1;
-        dstY=0;
-        lastInLumBuf= -1;
-        lastInChrBuf= -1;
-    }
-
-    lastDstY= dstY;
-
-    for (;dstY < dstH; dstY++) {
-        unsigned char *dest =dst[0]+dstStride[0]*dstY;
-        const int chrDstY= dstY>>c->chrDstVSubSample;
-        unsigned char *uDest=dst[1]+dstStride[1]*chrDstY;
-        unsigned char *vDest=dst[2]+dstStride[2]*chrDstY;
-        unsigned char *aDest=(CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3]+dstStride[3]*dstY : NULL;
-
-        const int firstLumSrcY= vLumFilterPos[dstY]; //First line needed as input
-        const int firstLumSrcY2= vLumFilterPos[FFMIN(dstY | ((1<<c->chrDstVSubSample) - 1), dstH-1)];
-        const int firstChrSrcY= vChrFilterPos[chrDstY]; //First line needed as input
-        int lastLumSrcY= firstLumSrcY + vLumFilterSize -1; // Last line needed as input
-        int lastLumSrcY2=firstLumSrcY2+ vLumFilterSize -1; // Last line needed as input
-        int lastChrSrcY= firstChrSrcY + vChrFilterSize -1; // Last line needed as input
-        int enough_lines;
-
-        //handle holes (FAST_BILINEAR & weird filters)
-        if (firstLumSrcY > lastInLumBuf) lastInLumBuf= firstLumSrcY-1;
-        if (firstChrSrcY > lastInChrBuf) lastInChrBuf= firstChrSrcY-1;
-        assert(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1);
-        assert(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);
-
-        DEBUG_BUFFERS("dstY: %d\n", dstY);
-        DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
-                         firstLumSrcY,    lastLumSrcY,    lastInLumBuf);
-        DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
-                         firstChrSrcY,    lastChrSrcY,    lastInChrBuf);
-
-        // Do we have enough lines in this slice to output the dstY line
-        enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH && lastChrSrcY < -((-srcSliceY - srcSliceH)>>c->chrSrcVSubSample);
-
-        if (!enough_lines) {
-            lastLumSrcY = srcSliceY + srcSliceH - 1;
-            lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
-            DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",
-                                            lastLumSrcY, lastChrSrcY);
-        }
-
-        //Do horizontal scaling
-        while(lastInLumBuf < lastLumSrcY) {
-            const uint8_t *src1= src[0]+(lastInLumBuf + 1 - srcSliceY)*srcStride[0];
-            const uint8_t *src2= src[3]+(lastInLumBuf + 1 - srcSliceY)*srcStride[3];
-            lumBufIndex++;
-            assert(lumBufIndex < 2*vLumBufSize);
-            assert(lastInLumBuf + 1 - srcSliceY < srcSliceH);
-            assert(lastInLumBuf + 1 - srcSliceY >= 0);
-            hyscale_c(c, lumPixBuf[ lumBufIndex ], dstW, src1, srcW, lumXInc,
-                            hLumFilter, hLumFilterPos, hLumFilterSize,
-                            formatConvBuffer,
-                            pal, 0);
-            if (CONFIG_SWSCALE_ALPHA && alpPixBuf)
-                hyscale_c(c, alpPixBuf[ lumBufIndex ], dstW, src2, srcW, lumXInc,
-                                hLumFilter, hLumFilterPos, hLumFilterSize,
-                                formatConvBuffer,
-                                pal, 1);
-            lastInLumBuf++;
-            DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",
-                               lumBufIndex,    lastInLumBuf);
-        }
-        while(lastInChrBuf < lastChrSrcY) {
-            const uint8_t *src1= src[1]+(lastInChrBuf + 1 - chrSrcSliceY)*srcStride[1];
-            const uint8_t *src2= src[2]+(lastInChrBuf + 1 - chrSrcSliceY)*srcStride[2];
-            chrBufIndex++;
-            assert(chrBufIndex < 2*vChrBufSize);
-            assert(lastInChrBuf + 1 - chrSrcSliceY < (chrSrcSliceH));
-            assert(lastInChrBuf + 1 - chrSrcSliceY >= 0);
-            //FIXME replace parameters through context struct (some at least)
-
-            if (c->needs_hcscale)
-                hcscale_c(c, chrPixBuf[ chrBufIndex ], chrDstW, src1, src2, chrSrcW, chrXInc,
-                                hChrFilter, hChrFilterPos, hChrFilterSize,
-                                formatConvBuffer,
-                                pal);
-            lastInChrBuf++;
-            DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n",
-                               chrBufIndex,    lastInChrBuf);
-        }
-        //wrap buf index around to stay inside the ring buffer
-        if (lumBufIndex >= vLumBufSize) lumBufIndex-= vLumBufSize;
-        if (chrBufIndex >= vChrBufSize) chrBufIndex-= vChrBufSize;
-        if (!enough_lines)
-            break; //we can't output a dstY line so let's try with the next slice
+    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)
@@ -2324,7 +2174,7 @@ static int RENAME(swScale)(SwsContext *c, const uint8_t* src[], int srcStride[],
         else
             c->greenDither= ff_dither4[dstY&1];
         c->redDither= ff_dither8[(dstY+1)&1];
-        if (dstY < dstH-2) {
+        if (dstY < dstH - 2) {
             const int16_t **lumSrcPtr= (const int16_t **) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
             const int16_t **chrSrcPtr= (const int16_t **) chrPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
             const int16_t **alpSrcPtr= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? (const int16_t **) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
@@ -2373,138 +2223,9 @@ static int RENAME(swScale)(SwsContext *c, const uint8_t* src[], int srcStride[],
                         ((uint16_t)vChrFilter[chrDstY*vChrFilterSize + i])*0x10001;
                 }
             }
-            if (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21) {
-                const int chrSkipMask= (1<<c->chrDstVSubSample)-1;
-                if (dstY&chrSkipMask) uDest= NULL; //FIXME split functions in lumi / chromi
-                c->yuv2nv12X(c,
-                             vLumFilter+dstY*vLumFilterSize   , lumSrcPtr, vLumFilterSize,
-                             vChrFilter+chrDstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                             dest, uDest, dstW, chrDstW, dstFormat);
-            } else if (isPlanarYUV(dstFormat) || dstFormat==PIX_FMT_GRAY8) { //YV12 like
-                const int chrSkipMask= (1<<c->chrDstVSubSample)-1;
-                if ((dstY&chrSkipMask) || isGray(dstFormat)) uDest=vDest= NULL; //FIXME split functions in lumi / chromi
-                if (is16BPS(dstFormat) || is9_OR_10BPS(dstFormat)) {
-                    yuv2yuvX16inC(
-                                  vLumFilter+dstY*vLumFilterSize   , lumSrcPtr, vLumFilterSize,
-                                  vChrFilter+chrDstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                  alpSrcPtr, (uint16_t *) dest, (uint16_t *) uDest, (uint16_t *) vDest, (uint16_t *) aDest, dstW, chrDstW,
-                                  dstFormat);
-                } else if (vLumFilterSize == 1 && vChrFilterSize == 1) { // unscaled YV12
-                    const int16_t *lumBuf = lumSrcPtr[0];
-                    const int16_t *chrBuf= chrSrcPtr[0];
-                    const int16_t *alpBuf= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? alpSrcPtr[0] : NULL;
-                    c->yuv2yuv1(c, lumBuf, chrBuf, alpBuf, dest, uDest, vDest, aDest, dstW, chrDstW);
-                } else { //General YV12
-                    c->yuv2yuvX(c,
-                                vLumFilter+dstY*vLumFilterSize   , lumSrcPtr, vLumFilterSize,
-                                vChrFilter+chrDstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                alpSrcPtr, dest, uDest, vDest, aDest, dstW, chrDstW);
-                }
-            } else {
-                assert(lumSrcPtr + vLumFilterSize - 1 < lumPixBuf + vLumBufSize*2);
-                assert(chrSrcPtr + vChrFilterSize - 1 < chrPixBuf + vChrBufSize*2);
-                if (vLumFilterSize == 1 && vChrFilterSize == 2) { //unscaled RGB
-                    int chrAlpha= vChrFilter[2*dstY+1];
-                    if(flags & SWS_FULL_CHR_H_INT) {
-                        yuv2rgbXinC_full(c, //FIXME write a packed1_full function
-                                         vLumFilter+dstY*vLumFilterSize, lumSrcPtr, vLumFilterSize,
-                                         vChrFilter+dstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                         alpSrcPtr, dest, dstW, dstY);
-                    } else {
-                        c->yuv2packed1(c, *lumSrcPtr, *chrSrcPtr, *(chrSrcPtr+1),
-                                       alpPixBuf ? *alpSrcPtr : NULL,
-                                       dest, dstW, chrAlpha, dstFormat, flags, dstY);
-                    }
-                } else if (vLumFilterSize == 2 && vChrFilterSize == 2) { //bilinear upscale RGB
-                    int lumAlpha= vLumFilter[2*dstY+1];
-                    int chrAlpha= vChrFilter[2*dstY+1];
-                    lumMmxFilter[2]=
-                    lumMmxFilter[3]= vLumFilter[2*dstY   ]*0x10001;
-                    chrMmxFilter[2]=
-                    chrMmxFilter[3]= vChrFilter[2*chrDstY]*0x10001;
-                    if(flags & SWS_FULL_CHR_H_INT) {
-                        yuv2rgbXinC_full(c, //FIXME write a packed2_full function
-                                         vLumFilter+dstY*vLumFilterSize, lumSrcPtr, vLumFilterSize,
-                                         vChrFilter+dstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                         alpSrcPtr, dest, dstW, dstY);
-                    } else {
-                        c->yuv2packed2(c, *lumSrcPtr, *(lumSrcPtr+1), *chrSrcPtr, *(chrSrcPtr+1),
-                                       alpPixBuf ? *alpSrcPtr : NULL, alpPixBuf ? *(alpSrcPtr+1) : NULL,
-                                       dest, dstW, lumAlpha, chrAlpha, dstY);
-                    }
-                } else { //general RGB
-                    if(flags & SWS_FULL_CHR_H_INT) {
-                        yuv2rgbXinC_full(c,
-                                         vLumFilter+dstY*vLumFilterSize, lumSrcPtr, vLumFilterSize,
-                                         vChrFilter+dstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                         alpSrcPtr, dest, dstW, dstY);
-                    } else {
-                        c->yuv2packedX(c,
-                                       vLumFilter+dstY*vLumFilterSize, lumSrcPtr, vLumFilterSize,
-                                       vChrFilter+dstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                       alpSrcPtr, dest, dstW, dstY);
-                    }
-                }
-            }
-        } else { // hmm looks like we can't use MMX here without overwriting this array's tail
-            const int16_t **lumSrcPtr= (const int16_t **)lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
-            const int16_t **chrSrcPtr= (const int16_t **)chrPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
-            const int16_t **alpSrcPtr= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? (const int16_t **)alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
-            if (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21) {
-                const int chrSkipMask= (1<<c->chrDstVSubSample)-1;
-                if (dstY&chrSkipMask) uDest= NULL; //FIXME split functions in lumi / chromi
-                yuv2nv12XinC(
-                             vLumFilter+dstY*vLumFilterSize   , lumSrcPtr, vLumFilterSize,
-                             vChrFilter+chrDstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                             dest, uDest, dstW, chrDstW, dstFormat);
-            } else if (isPlanarYUV(dstFormat) || dstFormat==PIX_FMT_GRAY8) { //YV12
-                const int chrSkipMask= (1<<c->chrDstVSubSample)-1;
-                if ((dstY&chrSkipMask) || isGray(dstFormat)) uDest=vDest= NULL; //FIXME split functions in lumi / chromi
-                if (is16BPS(dstFormat) || is9_OR_10BPS(dstFormat)) {
-                    yuv2yuvX16inC(
-                                  vLumFilter+dstY*vLumFilterSize   , lumSrcPtr, vLumFilterSize,
-                                  vChrFilter+chrDstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                  alpSrcPtr, (uint16_t *) dest, (uint16_t *) uDest, (uint16_t *) vDest, (uint16_t *) aDest, dstW, chrDstW,
-                                  dstFormat);
-                } else {
-                    yuv2yuvXinC(
-                                vLumFilter+dstY*vLumFilterSize   , lumSrcPtr, vLumFilterSize,
-                                vChrFilter+chrDstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                alpSrcPtr, dest, uDest, vDest, aDest, dstW, chrDstW);
-                }
-            } else {
-                assert(lumSrcPtr + vLumFilterSize - 1 < lumPixBuf + vLumBufSize*2);
-                assert(chrSrcPtr + vChrFilterSize - 1 < chrPixBuf + vChrBufSize*2);
-                if(flags & SWS_FULL_CHR_H_INT) {
-                    yuv2rgbXinC_full(c,
-                                     vLumFilter+dstY*vLumFilterSize, lumSrcPtr, vLumFilterSize,
-                                     vChrFilter+dstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                     alpSrcPtr, dest, dstW, dstY);
-                } else {
-                    yuv2packedXinC(c,
-                                   vLumFilter+dstY*vLumFilterSize, lumSrcPtr, vLumFilterSize,
-                                   vChrFilter+dstY*vChrFilterSize, chrSrcPtr, vChrFilterSize,
-                                   alpSrcPtr, dest, dstW, dstY);
-                }
-            }
         }
-    }
-
-    if ((dstFormat == PIX_FMT_YUVA420P) && !alpPixBuf)
-        fillPlane(dst[3], dstStride[3], dstW, dstY-lastDstY, lastDstY, 255);
-
-    if (COMPILE_TEMPLATE_MMX2)      __asm__ volatile("sfence":::"memory");
-    emms_c();
-
-    /* store changed local vars back in the context */
-    c->dstY= dstY;
-    c->lumBufIndex= lumBufIndex;
-    c->chrBufIndex= chrBufIndex;
-    c->lastInLumBuf= lastInLumBuf;
-    c->lastInChrBuf= lastInChrBuf;
-
-    return dstY - lastDstY;
 }
+#endif /* !COMPILE_TEMPLATE_MMX2 */
 
 static void RENAME(sws_init_swScale)(SwsContext *c)
 {