Extend the generic path of the yuv2rgb converter with support for rgb444

output format.

Patch by Janusz Krzysztofik, jkrzyszt A tis D icnet D pl

Originally committed as revision 30934 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

libswscale/swscale.c

@@ -39,7 +39,7 @@
 
 /*
 tested special converters (most are tested actually, but I did not write it down ...)
- YV12 -> BGR16
+ YV12 -> BGR12/BGR16
  YV12 -> YV12
  BGR15 -> BGR16
  BGR16 -> BGR16
@@ -805,6 +805,23 @@ static inline void yuv2nv12XinC(const int16_t *lumFilter, const int16_t **lumSrc
             }\
         }\
         break;\
+    case PIX_FMT_RGB444BE:\
+    case PIX_FMT_RGB444LE:\
+    case PIX_FMT_BGR444BE:\
+    case PIX_FMT_BGR444LE:\
+        {\
+            const int dr1= dither_4x4_16[y&3    ][0];\
+            const int dg1= dither_4x4_16[y&3    ][1];\
+            const int db1= dither_4x4_16[(y&3)^3][0];\
+            const int dr2= dither_4x4_16[y&3    ][1];\
+            const int dg2= dither_4x4_16[y&3    ][0];\
+            const int db2= dither_4x4_16[(y&3)^3][1];\
+            func(uint16_t,0)\
+                ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
+                ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
+            }\
+        }\
+        break;\
     case PIX_FMT_RGB8:\
     case PIX_FMT_BGR8:\
         {\

libswscale/utils.c

@@ -1115,7 +1115,9 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
         av_log(c, AV_LOG_INFO, "from %s to %s%s ",
                sws_format_name(srcFormat),
 #ifdef DITHER1XBPP
-               dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ? "dithered " : "",
+               dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
+               dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
+               dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
 #else
                "",
 #endif
@@ -1184,6 +1186,9 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
         else if (dstFormat==PIX_FMT_BGR555)
             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
+        else if (dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
+                 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE)
+            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR12 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
 
         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
         av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",