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authorN.N. <sevyves@users.sourceforge.net>2008-05-30 18:20:28 +0000
committerN.N. <sevyves@users.sourceforge.net>2008-05-30 18:20:28 +0000
commit6726719d723f2f816827739aa59187848746f64f (patch)
tree7712c621cb54100e5c93af43882cd644fc97a6ec /system/image
parenta587a74821c155e281d2a6ce9a9a1d7b6a336fce (diff)
add conversion to UYVY needed for some cameras
svn path=/trunk/externals/pdp/; revision=9947
Diffstat (limited to 'system/image')
-rw-r--r--system/image/pdp_llconv.c66
1 files changed, 65 insertions, 1 deletions
diff --git a/system/image/pdp_llconv.c b/system/image/pdp_llconv.c
index 666a1c4..7826cfa 100644
--- a/system/image/pdp_llconv.c
+++ b/system/image/pdp_llconv.c
@@ -1,6 +1,6 @@
/*
* Pure Data Packet system implementation. : low level format conversion code
- * Copyright (c) by Tom Schouten <tom@zwizwa.be>
+ * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -509,6 +509,66 @@ static void llconv_yuyv_packed_u8s16(unsigned char* ucsource, short int *sidest,
}
+
+
+/* convert yuvu packed 8 bit unsigned to yv12 planar 16bit signed */
+/* search for bithacks */
+static void llconv_uyvy_packed_u8s16(unsigned char* ucsource, short int *sidest, unsigned int w, unsigned int h)
+{
+ unsigned int i, j;
+ unsigned int *source = (unsigned int *)ucsource;
+
+ unsigned int *dest = (unsigned int *)sidest;
+ unsigned int uoffset = (w*h)>>1;
+ unsigned int voffset = (w*h + ((w*h) >> 2)) >> 1;
+
+ for(j=0; j < (h*w)>>1; j +=(w)){
+ for(i=0; i< (w>>1); i+=2){
+ unsigned int y,u,v;
+ unsigned int v00, v01, v10, v11;
+ v00 = source[i+j];
+ v01 = source[i+j+1];
+ v10 = source[i+j+(w>>1)];
+ v11 = source[i+j+(w>>1)+1];
+
+ // save luma
+ dest[i+j] = ((v00 & 0xff00ff00)>>1);
+ v11 = source[i+j+(w>>1)+1];
+
+ // save luma
+ dest[i+j] = ((v00 & 0xff00ff00)>>1);
+ dest[i+j+1] = ((v01 & 0xff00ff00)>>1);
+ dest[i+j+(w>>1)] = ((v10 & 0xff00ff00)>>1);
+ dest[i+j+(w>>1)+1] = ((v11 & 0xff00ff00)>>1);
+
+ // compute chroma
+
+
+ v00 = (v00 & 0x00ff00ff) << 7;
+ v01 = (v01 & 0x00ff00ff) << 7;
+ v10 = (v10 & 0x00ff00ff) << 7;
+ v11 = (v11 & 0x00ff00ff) << 7;
+
+ // average 2 scan lines
+ v00 += v10;
+ v01 += v11;
+
+ // combine TWO VALUES IN ONE WORD (32bits)
+ v = (v01 << 16) | (v00 & 0x0000ffff);
+ u = (v01 & 0xffff0000) | (v00 >> 16);
+
+ // flip sign bits for u,v FOR PDP FORMAT
+ u ^= 0x80008000;
+ v ^= 0x80008000;
+
+ // save chroma
+ dest[uoffset + (i>>1) + (j>>2)] = u;
+ dest[voffset + (i>>1) + (j>>2)] = v;
+ }
+ }
+
+}
+
#define CONVERT(x,y) ((x) + ((y)<<16))
void pdp_llconv(void *src, int stype, void *dst, int dtype, int w, int h)
@@ -530,6 +590,10 @@ void pdp_llconv(void *src, int stype, void *dst, int dtype, int w, int h)
llconv_yuyv_packed_u8s16((unsigned char*)src, (short int *)dst, w, h);
break;
+ case CONVERT( RIF_UYVY_P____U8, RIF_YVU__P411_S16 ):
+ llconv_uyvy_packed_u8s16((unsigned char*)src, (short int *)dst, w, h);
+ break;
+
case CONVERT( RIF_RGB__P____U8, RIF_YVU__P411_U8 ):
llconv_rgb2yvu_planar8sub((unsigned char*) src, (unsigned char*) dst, w, h);
break;