From: Alan Curry <pacman@world.std.com>
Date: Sat, 11 Feb 2006 13:35:46 +0000 (+0000)
Subject: Fix big-endian color permutation problems.
X-Git-Tag: v0.5~13174
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f688668c3caf1413fb510070c140a37f2eb80971;p=platform%2Fupstream%2Flibav.git

Fix big-endian color permutation problems.
patch by Alan Curry, pacman_at_TheWorld_dot_com

Originally committed as revision 17587 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc
---

diff --git a/postproc/rgb2rgb.c b/postproc/rgb2rgb.c
index 94289a4..d7a3360 100644
--- a/postproc/rgb2rgb.c
+++ b/postproc/rgb2rgb.c
@@ -446,9 +446,16 @@ void rgb32tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
 	long num_pixels = src_size >> 2;
 	for(i=0; i<num_pixels; i++)
 	{
+		#ifdef WORDS_BIGENDIAN
+		/* RGB32 (= A,B,G,R) -> BGR24 (= B,G,R) */
+		dst[3*i + 0] = src[4*i + 1];
+		dst[3*i + 1] = src[4*i + 2];
+		dst[3*i + 2] = src[4*i + 3];
+		#else
 		dst[3*i + 0] = src[4*i + 2];
 		dst[3*i + 1] = src[4*i + 1];
 		dst[3*i + 2] = src[4*i + 0];
+		#endif
 	}
 }
 
@@ -457,10 +464,18 @@ void rgb24tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
 	long i;
 	for(i=0; 3*i<src_size; i++)
 	{
+		#ifdef WORDS_BIGENDIAN
+		/* RGB24 (= R,G,B) -> BGR32 (= A,R,G,B) */
+		dst[4*i + 0] = 0;
+		dst[4*i + 1] = src[3*i + 0];
+		dst[4*i + 2] = src[3*i + 1];
+		dst[4*i + 3] = src[3*i + 2];
+		#else
 		dst[4*i + 0] = src[3*i + 2];
 		dst[4*i + 1] = src[3*i + 1];
 		dst[4*i + 2] = src[3*i + 0];
 		dst[4*i + 3] = 0;
+		#endif
 	}
 }
 
@@ -474,10 +489,17 @@ void rgb16tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
 	{
 		register uint16_t bgr;
 		bgr = *s++;
+		#ifdef WORDS_BIGENDIAN
+		*d++ = 0;
+		*d++ = (bgr&0x1F)<<3;
+		*d++ = (bgr&0x7E0)>>3;
+		*d++ = (bgr&0xF800)>>8;
+		#else
 		*d++ = (bgr&0xF800)>>8;
 		*d++ = (bgr&0x7E0)>>3;
 		*d++ = (bgr&0x1F)<<3;
 		*d++ = 0;
+		#endif
 	}
 }
 
@@ -541,10 +563,17 @@ void rgb15tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
 	{
 		register uint16_t bgr;
 		bgr = *s++;
+		#ifdef WORDS_BIGENDIAN
+		*d++ = 0;
+		*d++ = (bgr&0x1F)<<3;
+		*d++ = (bgr&0x3E0)>>2;
+		*d++ = (bgr&0x7C00)>>7;
+		#else
 		*d++ = (bgr&0x7C00)>>7;
 		*d++ = (bgr&0x3E0)>>2;
 		*d++ = (bgr&0x1F)<<3;
 		*d++ = 0;
+		#endif
 	}
 }
 
diff --git a/postproc/rgb2rgb_template.c b/postproc/rgb2rgb_template.c
index 1301c45..b08778a 100644
--- a/postproc/rgb2rgb_template.c
+++ b/postproc/rgb2rgb_template.c
@@ -104,10 +104,12 @@ static inline void RENAME(rgb24to32)(const uint8_t *src,uint8_t *dst,long src_si
   while(s < end)
   {
 #ifdef WORDS_BIGENDIAN
+    /* RGB24 (= R,G,B) -> RGB32 (= A,B,G,R) */
     *dest++ = 0;
-    *dest++ = *s++;
-    *dest++ = *s++;
-    *dest++ = *s++;
+    *dest++ = s[2];
+    *dest++ = s[1];
+    *dest++ = s[0];
+    s+=3;
 #else
     *dest++ = *s++;
     *dest++ = *s++;
@@ -188,10 +190,12 @@ static inline void RENAME(rgb32to24)(const uint8_t *src,uint8_t *dst,long src_si
   while(s < end)
   {
 #ifdef WORDS_BIGENDIAN
+    /* RGB32 (= A,B,G,R) -> RGB24 (= R,G,B) */
     s++;
-    *dest++ = *s++;
-    *dest++ = *s++;
-    *dest++ = *s++;
+    dest[2] = *s++;
+    dest[1] = *s++;
+    dest[0] = *s++;
+    dest += 3;
 #else
     *dest++ = *s++;
     *dest++ = *s++;
@@ -465,6 +469,7 @@ static inline void RENAME(rgb32tobgr16)(const uint8_t *src, uint8_t *dst, long s
 	while(s < end)
 	{
 		// FIXME on bigendian
+		/* Looks bigendian-OK to me. --Pac. */
 		const int src= *s; s += 4;
 		*d++ = ((src&0xF8)<<8) + ((src&0xFC00)>>5) + ((src&0xF80000)>>19);
 	}
@@ -562,6 +567,7 @@ static inline void RENAME(rgb32to15)(const uint8_t *src, uint8_t *dst, long src_
 	while(s < end)
 	{
 		// FIXME on bigendian
+		/* Looks bigendian-OK to me. --Pac. */
 		const int src= *s; s += 4;
 		*d++ = ((src&0xFF)>>3) + ((src&0xF800)>>6) + ((src&0xF80000)>>9);
 	}
@@ -624,6 +630,7 @@ static inline void RENAME(rgb32tobgr15)(const uint8_t *src, uint8_t *dst, long s
 	while(s < end)
 	{
 		// FIXME on bigendian
+		/* Looks bigendian-OK to me. --Pac. */
 		const int src= *s; s += 4;
 		*d++ = ((src&0xF8)<<7) + ((src&0xF800)>>6) + ((src&0xF80000)>>19);
 	}
@@ -1247,14 +1254,13 @@ static inline void RENAME(rgb15to32)(const uint8_t *src, uint8_t *dst, long src_
 		int bgr= *s++;
 		*((uint32_t*)d)++ = ((bgr&0x1F)<<3) + ((bgr&0x3E0)<<6) + ((bgr&0x7C00)<<9);
 #else
-//FIXME this is very likely wrong for bigendian (and the following converters too)
 		register uint16_t bgr;
 		bgr = *s++;
 #ifdef WORDS_BIGENDIAN
 		*d++ = 0;
-		*d++ = (bgr&0x1F)<<3;
-		*d++ = (bgr&0x3E0)>>2;
 		*d++ = (bgr&0x7C00)>>7;
+		*d++ = (bgr&0x3E0)>>2;
+		*d++ = (bgr&0x1F)<<3;
 #else
 		*d++ = (bgr&0x1F)<<3;
 		*d++ = (bgr&0x3E0)>>2;
@@ -1326,9 +1332,9 @@ static inline void RENAME(rgb16to32)(const uint8_t *src, uint8_t *dst, long src_
 		bgr = *s++;
 #ifdef WORDS_BIGENDIAN
 		*d++ = 0;
-		*d++ = (bgr&0x1F)<<3;
-		*d++ = (bgr&0x7E0)>>3;
 		*d++ = (bgr&0xF800)>>8;
+		*d++ = (bgr&0x7E0)>>3;
+		*d++ = (bgr&0x1F)<<3;
 #else
 		*d++ = (bgr&0x1F)<<3;
 		*d++ = (bgr&0x7E0)>>3;