altivec yuv->rgb converter

orginal patch  by (Marc Hoffman <mmh at pleasantst dot com>)
critical fixes by (Reza Jelveh <reza.jelveh at tu-harburg dot de>)

known bugs/issues, which should be fixed ASAP by someone who has a ppc:
0..255 vs. 16..235
unneeded recalculation of tables
general cleaup, like removing double initalizing of variables


git-svn-id: file:///var/local/repositories/mplayer/trunk/postproc@12699 b3059339-0415-0410-9bf9-f77b7e298cf2

Makefile

@@ -4,8 +4,13 @@ include ../config.mak
 SWSLIB = libswscale.a
 
 SWSSRCS=swscale.c rgb2rgb.c yuv2rgb.c
+
 SWSOBJS=$(SWSSRCS:.c=.o)
 
+ifeq ($(TARGET_ALTIVEC),yes)
+SWSOBJS +=  yuv2rgb_altivec.o
+endif
+
 CFLAGS  = $(OPTFLAGS) $(MLIB_INC) -I. -I.. $(EXTRA_INC)
 # -I/usr/X11R6/include/
 
@@ -44,3 +49,4 @@ swscale-example: swscale-example.o $(SWSLIB)
 ifneq ($(wildcard .depend),)
 include .depend
 endif
+

cs_test.c

@@ -28,6 +28,10 @@
 #define srcByte 0x55
 #define dstByte 0xBB
 
+#ifdef __APPLE_CC__
+#define memalign(x,y) malloc(y)
+#endif
+
 static int get_sws_cpuflags()
 {
     return (gCpuCaps.hasMMX ? SWS_CPU_CAPS_MMX : 0) |
@@ -281,4 +285,4 @@ main(int argc, char **argv)
 	
 	printf("%d converters passed, %d converters randomly overwrote memory\n", passedNum, failedNum);
 	return failedNum;
-}
\ No newline at end of file
+}

swscale.c

@@ -1726,7 +1726,10 @@ int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange
 
 	yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
 	//FIXME factorize
-	
+
+#ifdef HAVE_ALTIVEC
+	yuv2rgb_altivec_init_tables (c, inv_table);
+#endif	
 	return 0;
 }
 

swscale_internal.h

@@ -132,6 +132,19 @@ typedef struct SwsContext{
 	int dstW;
 	int esp;
 	uint64_t vRounder     __attribute__((aligned(8)));
+
+#ifdef HAVE_ALTIVEC
+
+  vector signed short   CY;
+  vector signed short   CRV;
+  vector signed short   CBU;
+  vector signed short   CGU;
+  vector signed short   CGV;
+  vector signed short   OY;
+  vector unsigned short CSHIFT;
+
+#endif
+
 } SwsContext;
 //FIXME check init (where 0)
 

swscale_template.c

@@ -943,9 +943,15 @@ static inline void RENAME(yuv2packedX)(SwsContext *c, int16_t *lumFilter, int16_
 		break;
 #endif
 	default:
+#ifdef HAVE_ALTIVEC
+		altivec_yuv2packedX (c, lumFilter, lumSrc, lumFilterSize,
+			    chrFilter, chrSrc, chrFilterSize,
+			    dest, dstW, dstY);
+#else
 		yuv2packedXinC(c, lumFilter, lumSrc, lumFilterSize,
 			    chrFilter, chrSrc, chrFilterSize,
 			    dest, dstW, dstY);
+#endif
 		break;
 	}
 }

yuv2rgb.c

@@ -607,6 +607,14 @@ SwsFunc yuv2rgb_get_func_ptr (SwsContext *c)
 	if(t) return t;
     }
 #endif
+#ifdef HAVE_ALTIVEC
+    if (c->flags & SWS_CPU_CAPS_ALTIVEC)
+    {
+	SwsFunc t = yuv2rgb_init_altivec(c);
+	if(t) return t;
+    }
+#endif
+
     MSG_WARN("No accelerated colorspace conversion found\n");
 
     switch(c->dstFormat){