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author | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2005-12-16 01:05:40 +0000 |
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committer | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2005-12-16 01:05:40 +0000 |
commit | b694c274836ac8b04d644711ac324eac2e9ab83e (patch) | |
tree | 36b6a5c17f7e1f414f80697210c2ed3e8005035b /system/image/pdp_llconv_portable.c | |
parent | e28a07fba67af0af818dda6afa4cf67c09700816 (diff) |
checking in pdp 0.12.4 from http://zwizwa.fartit.com/pd/pdp/pdp-0.12.4.tar.gz
svn path=/trunk/externals/pdp/; revision=4232
Diffstat (limited to 'system/image/pdp_llconv_portable.c')
-rw-r--r-- | system/image/pdp_llconv_portable.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/system/image/pdp_llconv_portable.c b/system/image/pdp_llconv_portable.c new file mode 100644 index 0000000..f6d5a44 --- /dev/null +++ b/system/image/pdp_llconv_portable.c @@ -0,0 +1,82 @@ + +/* + * Pure Data Packet system implementation. : portable low level format conversion code + * 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 + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#define CLAMP(x) (((x)<0) ? 0 : ((x>255)? 255 : (x))) +#define FP(x) ((int)(((float)(x)) * 256.0f)) + +void pixel_unpack_portable_u8s16_y(unsigned char *src ,short int *dst, unsigned int nbpixels) +{ + unsigned int i; + for (i=0; i<nbpixels; i++) dst[i] = ((short int)(src[i])) << 7; +} + +void pixel_unpack_portable_u8s16_uv(unsigned char *src ,short int *dst, unsigned int nbpixels) +{ + unsigned int i; + for (i=0; i<nbpixels; i++) dst[i] = (((short int)(src[i])) << 8) ^ 0x8000; +} + + +void pixel_pack_portable_s16u8_y(short int *src, unsigned char *dst, unsigned int nbpixels) +{ + unsigned int i; + for (i=0; i<nbpixels; i++) dst[i] = (unsigned char)(CLAMP(src[i]>>7)); +} + +void pixel_pack_portable_s16u8_uv(short int *src, unsigned char *dst, unsigned int nbpixels) +{ + unsigned int i; + unsigned short *usrc = (unsigned short *)src; + for (i=0; i<nbpixels; i++) dst[i] = ((usrc[i]^0x8000)>>8); +} + + +/* convert greyscale 8 bit unsigned to 16bit signed */ +void llconv_grey_s16u8(short int *src, unsigned char *dst, unsigned int nbpixels) +{ + pixel_pack_portable_s16u8_y(src, dst, nbpixels); +} + +/* convert yvu planar 411 16 bit signed to 8 bit unsigned */ +void llconv_yvu_planar_s16u8(short int *src, unsigned char *dst, unsigned int nbpixels) +{ + pixel_pack_portable_s16u8_y(src, dst, nbpixels); + pixel_pack_portable_s16u8_uv(src + nbpixels, dst + nbpixels, nbpixels>>1); + +} + + +/* convert yvu planar 411 8 bit unsigned to yv12 planar 16bit signed */ +void llconv_yvu_planar_u8s16(unsigned char* source, short int *dest, int nbpixels) +{ + pixel_unpack_portable_u8s16_y(source, dest, nbpixels); + pixel_unpack_portable_u8s16_uv(&source[nbpixels], &dest[nbpixels], nbpixels>>1); +} + +/* convert yuv planar 411 8 bit unsigned to yv12 planar 16bit signed */ +void llconv_yuv_planar_u8s16(unsigned char* source, short int *dest, int nbpixels) +{ + pixel_unpack_portable_u8s16_y(source, dest, nbpixels); + pixel_unpack_portable_u8s16_uv(&source[nbpixels], &dest[nbpixels + (nbpixels>>2)], nbpixels>>2); + pixel_unpack_portable_u8s16_uv(&source[nbpixels + (nbpixels>>2)], &dest[nbpixels], nbpixels>>2); +} + + |