swscale: Fix rounding in yuv2rgb_1_c_template()

[ffmpeg] / libswscale / utils.c

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 46ebb7f647717187a6394c94f361beb70189b226..70b724e0432340f863f813735b297fefb49ca15c 100644 (file)
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -111,6 +111,7 @@ static const FormatEntry format_entries[PIX_FMT_NB] = {
     [PIX_FMT_YUV440P]     = { 1 , 1 },
     [PIX_FMT_YUVJ440P]    = { 1 , 1 },
     [PIX_FMT_YUVA420P]    = { 1 , 1 },
+    [PIX_FMT_YUVA444P]    = { 1 , 1 },
     [PIX_FMT_RGB48BE]     = { 1 , 1 },
     [PIX_FMT_RGB48LE]     = { 1 , 1 },
     [PIX_FMT_RGBA64BE]    = { 0 , 0 },
@@ -274,7 +275,7 @@ static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSi
         if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale
         else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
 
-        if (filterSize > srcW-2) filterSize=srcW-2;
+        filterSize = av_clip(filterSize, 1, srcW - 2);
 
         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
 
@@ -748,10 +749,17 @@ static int handle_jpeg(enum PixelFormat *format)
     case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
     case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
     case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
-    case PIX_FMT_0BGR    : *format = PIX_FMT_ABGR   ; return 0;
-    case PIX_FMT_BGR0    : *format = PIX_FMT_BGRA   ; return 0;
-    case PIX_FMT_0RGB    : *format = PIX_FMT_ARGB   ; return 0;
-    case PIX_FMT_RGB0    : *format = PIX_FMT_RGBA   ; return 0;
+    default:                                          return 0;
+    }
+}
+
+static int handle_0alpha(enum PixelFormat *format)
+{
+    switch (*format) {
+    case PIX_FMT_0BGR    : *format = PIX_FMT_ABGR   ; return 1;
+    case PIX_FMT_BGR0    : *format = PIX_FMT_BGRA   ; return 4;
+    case PIX_FMT_0RGB    : *format = PIX_FMT_ARGB   ; return 1;
+    case PIX_FMT_RGB0    : *format = PIX_FMT_RGBA   ; return 4;
     default:                                          return 0;
     }
 }
@@ -790,6 +798,8 @@ int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
 
     handle_jpeg(&srcFormat);
     handle_jpeg(&dstFormat);
+    handle_0alpha(&srcFormat);
+    handle_0alpha(&dstFormat);
 
     if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat){
         av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
@@ -818,7 +828,7 @@ int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
                 |SWS_SPLINE
                 |SWS_BICUBLIN);
     if(!i || (i & (i-1))) {
-        av_log(c, AV_LOG_ERROR, "Exactly one scaler algorithm must be chosen\n");
+        av_log(c, AV_LOG_ERROR, "Exactly one scaler algorithm must be chosen, got %X\n", i);
         return AVERROR(EINVAL);
     }
     /* sanity check */
@@ -1147,6 +1157,8 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
     c->dstH= dstH;
     c->srcRange = handle_jpeg(&srcFormat);
     c->dstRange = handle_jpeg(&dstFormat);
+    c->src0Alpha = handle_0alpha(&srcFormat);
+    c->dst0Alpha = handle_0alpha(&dstFormat);
     c->srcFormat= srcFormat;
     c->dstFormat= dstFormat;
 
@@ -1545,10 +1557,12 @@ struct SwsContext *sws_getCachedContext(struct SwsContext *context,
         context->srcW      = srcW;
         context->srcH      = srcH;
         context->srcRange  = handle_jpeg(&srcFormat);
+        context->src0Alpha = handle_0alpha(&srcFormat);
         context->srcFormat = srcFormat;
         context->dstW      = dstW;
         context->dstH      = dstH;
         context->dstRange  = handle_jpeg(&dstFormat);
+        context->dst0Alpha = handle_0alpha(&dstFormat);
         context->dstFormat = dstFormat;
         context->flags     = flags;
         context->param[0]  = param[0];
@@ -1561,4 +1575,3 @@ struct SwsContext *sws_getCachedContext(struct SwsContext *context,
     }
     return context;
 }
-