diff options
Diffstat (limited to 'system/image')
| -rw-r--r-- | system/image/pdp_llconv.c | 66 |
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; |