sws: handle non native rgb<->rgb convertions

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 14 insertions, 7 deletions

diff --git a/libswscale/swscale_unscaled.c b/libswscale/swscale_unscaled.c
index 307f4da8c9..74767ae534 100644
--- a/libswscale/swscale_unscaled.c
+++ b/libswscale/swscale_unscaled.c
@@ -542,10 +542,6 @@ static rgbConvFn findRgbConvFn(SwsContext *c)
     (((bpp + 7) >> 3) == 2 && \
      (!(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
 
-    /* if this is non-native rgb444/555/565, don't handle it here. */
-    if (IS_NOT_NE(srcId, srcFormat) || IS_NOT_NE(dstId, dstFormat))
-        return NULL;
-
 #define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == PIX_FMT_##dst)
 
     if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
@@ -632,6 +628,9 @@ static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
     } else {
         const uint8_t *srcPtr = src[0];
               uint8_t *dstPtr = dst[0];
+        int src_bswap = IS_NOT_NE(c->srcFormatBpp, srcFormat);
+        int dst_bswap = IS_NOT_NE(c->dstFormatBpp, dstFormat);
+
         if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) &&
             !isRGBA32(dstFormat))
             srcPtr += ALT32_CORR;
@@ -641,15 +640,23 @@ static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
             dstPtr += ALT32_CORR;
 
         if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
-            !(srcStride[0] % srcBpp))
+            !(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)
             conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
                  srcSliceH * srcStride[0]);
         else {
-            int i;
+            int i, j;
             dstPtr += dstStride[0] * srcSliceY;
 
             for (i = 0; i < srcSliceH; i++) {
-                conv(srcPtr, dstPtr, c->srcW * srcBpp);
+                if(src_bswap) {
+                    for(j=0; j<c->srcW; j++)
+                        ((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);
+                    conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);
+                }else
+                    conv(srcPtr, dstPtr, c->srcW * srcBpp);
+                if(dst_bswap)
+                    for(j=0; j<c->srcW; j++)
+                        ((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);
                 srcPtr += srcStride[0];
                 dstPtr += dstStride[0];
             }