Libav 0.7.1
libswscale/rgb2rgb.c
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00001 /*
00002  * software RGB to RGB converter
00003  * pluralize by software PAL8 to RGB converter
00004  *              software YUV to YUV converter
00005  *              software YUV to RGB converter
00006  * Written by Nick Kurshev.
00007  * palette & YUV & runtime CPU stuff by Michael (michaelni@gmx.at)
00008  *
00009  * This file is part of Libav.
00010  *
00011  * Libav is free software; you can redistribute it and/or
00012  * modify it under the terms of the GNU Lesser General Public
00013  * License as published by the Free Software Foundation; either
00014  * version 2.1 of the License, or (at your option) any later version.
00015  *
00016  * Libav is distributed in the hope that it will be useful,
00017  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00019  * Lesser General Public License for more details.
00020  *
00021  * You should have received a copy of the GNU Lesser General Public
00022  * License along with Libav; if not, write to the Free Software
00023  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00024  */
00025 #include <inttypes.h>
00026 #include "config.h"
00027 #include "libavutil/bswap.h"
00028 #include "rgb2rgb.h"
00029 #include "swscale.h"
00030 #include "swscale_internal.h"
00031 
00032 void (*rgb24tobgr32)(const uint8_t *src, uint8_t *dst, int src_size);
00033 void (*rgb24tobgr16)(const uint8_t *src, uint8_t *dst, int src_size);
00034 void (*rgb24tobgr15)(const uint8_t *src, uint8_t *dst, int src_size);
00035 void (*rgb32tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
00036 void (*rgb32to16)(const uint8_t *src, uint8_t *dst, int src_size);
00037 void (*rgb32to15)(const uint8_t *src, uint8_t *dst, int src_size);
00038 void (*rgb15to16)(const uint8_t *src, uint8_t *dst, int src_size);
00039 void (*rgb15tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
00040 void (*rgb15to32)(const uint8_t *src, uint8_t *dst, int src_size);
00041 void (*rgb16to15)(const uint8_t *src, uint8_t *dst, int src_size);
00042 void (*rgb16tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
00043 void (*rgb16to32)(const uint8_t *src, uint8_t *dst, int src_size);
00044 void (*rgb24tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
00045 void (*rgb24to16)(const uint8_t *src, uint8_t *dst, int src_size);
00046 void (*rgb24to15)(const uint8_t *src, uint8_t *dst, int src_size);
00047 void (*shuffle_bytes_2103)(const uint8_t *src, uint8_t *dst, int src_size);
00048 void (*rgb32tobgr16)(const uint8_t *src, uint8_t *dst, int src_size);
00049 void (*rgb32tobgr15)(const uint8_t *src, uint8_t *dst, int src_size);
00050 
00051 void (*yv12toyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
00052                    int width, int height,
00053                    int lumStride, int chromStride, int dstStride);
00054 void (*yv12touyvy)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
00055                    int width, int height,
00056                    int lumStride, int chromStride, int dstStride);
00057 void (*yuv422ptoyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
00058                       int width, int height,
00059                       int lumStride, int chromStride, int dstStride);
00060 void (*yuv422ptouyvy)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
00061                       int width, int height,
00062                       int lumStride, int chromStride, int dstStride);
00063 void (*yuy2toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
00064                    int width, int height,
00065                    int lumStride, int chromStride, int srcStride);
00066 void (*rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
00067                     int width, int height,
00068                     int lumStride, int chromStride, int srcStride);
00069 void (*planar2x)(const uint8_t *src, uint8_t *dst, int width, int height,
00070                  int srcStride, int dstStride);
00071 void (*interleaveBytes)(const uint8_t *src1, const uint8_t *src2, uint8_t *dst,
00072                         int width, int height, int src1Stride,
00073                         int src2Stride, int dstStride);
00074 void (*vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
00075                     uint8_t *dst1, uint8_t *dst2,
00076                     int width, int height,
00077                     int srcStride1, int srcStride2,
00078                     int dstStride1, int dstStride2);
00079 void (*yvu9_to_yuy2)(const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
00080                      uint8_t *dst,
00081                      int width, int height,
00082                      int srcStride1, int srcStride2,
00083                      int srcStride3, int dstStride);
00084 void (*uyvytoyuv420)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
00085                      int width, int height,
00086                      int lumStride, int chromStride, int srcStride);
00087 void (*uyvytoyuv422)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
00088                      int width, int height,
00089                      int lumStride, int chromStride, int srcStride);
00090 void (*yuyvtoyuv420)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
00091                      int width, int height,
00092                      int lumStride, int chromStride, int srcStride);
00093 void (*yuyvtoyuv422)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
00094                      int width, int height,
00095                      int lumStride, int chromStride, int srcStride);
00096 
00097 #define RGB2YUV_SHIFT 8
00098 #define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
00099 #define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
00100 #define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
00101 #define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
00102 #define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
00103 #define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
00104 #define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
00105 #define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
00106 #define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
00107 
00108 //plain C versions
00109 #include "rgb2rgb_template.c"
00110 
00111 
00112 /*
00113  RGB15->RGB16 original by Strepto/Astral
00114  ported to gcc & bugfixed : A'rpi
00115  MMX2, 3DNOW optimization by Nick Kurshev
00116  32-bit C version, and and&add trick by Michael Niedermayer
00117 */
00118 
00119 void sws_rgb2rgb_init(void)
00120 {
00121     rgb2rgb_init_c();
00122     if (HAVE_MMX)
00123         rgb2rgb_init_x86();
00124 }
00125 
00126 void rgb32to24(const uint8_t *src, uint8_t *dst, int src_size)
00127 {
00128     int i;
00129     int num_pixels = src_size >> 2;
00130     for (i=0; i<num_pixels; i++) {
00131 #if HAVE_BIGENDIAN
00132         /* RGB32 (= A,B,G,R) -> BGR24 (= B,G,R) */
00133         dst[3*i + 0] = src[4*i + 1];
00134         dst[3*i + 1] = src[4*i + 2];
00135         dst[3*i + 2] = src[4*i + 3];
00136 #else
00137         dst[3*i + 0] = src[4*i + 2];
00138         dst[3*i + 1] = src[4*i + 1];
00139         dst[3*i + 2] = src[4*i + 0];
00140 #endif
00141     }
00142 }
00143 
00144 void rgb24to32(const uint8_t *src, uint8_t *dst, int src_size)
00145 {
00146     int i;
00147     for (i=0; 3*i<src_size; i++) {
00148 #if HAVE_BIGENDIAN
00149         /* RGB24 (= R,G,B) -> BGR32 (= A,R,G,B) */
00150         dst[4*i + 0] = 255;
00151         dst[4*i + 1] = src[3*i + 0];
00152         dst[4*i + 2] = src[3*i + 1];
00153         dst[4*i + 3] = src[3*i + 2];
00154 #else
00155         dst[4*i + 0] = src[3*i + 2];
00156         dst[4*i + 1] = src[3*i + 1];
00157         dst[4*i + 2] = src[3*i + 0];
00158         dst[4*i + 3] = 255;
00159 #endif
00160     }
00161 }
00162 
00163 void rgb16tobgr32(const uint8_t *src, uint8_t *dst, int src_size)
00164 {
00165     const uint16_t *end;
00166     uint8_t *d = dst;
00167     const uint16_t *s = (const uint16_t *)src;
00168     end = s + src_size/2;
00169     while (s < end) {
00170         register uint16_t bgr;
00171         bgr = *s++;
00172 #if HAVE_BIGENDIAN
00173         *d++ = 255;
00174         *d++ = (bgr&0x1F)<<3;
00175         *d++ = (bgr&0x7E0)>>3;
00176         *d++ = (bgr&0xF800)>>8;
00177 #else
00178         *d++ = (bgr&0xF800)>>8;
00179         *d++ = (bgr&0x7E0)>>3;
00180         *d++ = (bgr&0x1F)<<3;
00181         *d++ = 255;
00182 #endif
00183     }
00184 }
00185 
00186 void rgb16to24(const uint8_t *src, uint8_t *dst, int src_size)
00187 {
00188     const uint16_t *end;
00189     uint8_t *d = dst;
00190     const uint16_t *s = (const uint16_t *)src;
00191     end = s + src_size/2;
00192     while (s < end) {
00193         register uint16_t bgr;
00194         bgr = *s++;
00195         *d++ = (bgr&0xF800)>>8;
00196         *d++ = (bgr&0x7E0)>>3;
00197         *d++ = (bgr&0x1F)<<3;
00198     }
00199 }
00200 
00201 void rgb16tobgr16(const uint8_t *src, uint8_t *dst, int src_size)
00202 {
00203     int i;
00204     int num_pixels = src_size >> 1;
00205 
00206     for (i=0; i<num_pixels; i++) {
00207         unsigned rgb = ((const uint16_t*)src)[i];
00208         ((uint16_t*)dst)[i] = (rgb>>11) | (rgb&0x7E0) | (rgb<<11);
00209     }
00210 }
00211 
00212 void rgb16tobgr15(const uint8_t *src, uint8_t *dst, int src_size)
00213 {
00214     int i;
00215     int num_pixels = src_size >> 1;
00216 
00217     for (i=0; i<num_pixels; i++) {
00218         unsigned rgb = ((const uint16_t*)src)[i];
00219         ((uint16_t*)dst)[i] = (rgb>>11) | ((rgb&0x7C0)>>1) | ((rgb&0x1F)<<10);
00220     }
00221 }
00222 
00223 void rgb15tobgr32(const uint8_t *src, uint8_t *dst, int src_size)
00224 {
00225     const uint16_t *end;
00226     uint8_t *d = dst;
00227     const uint16_t *s = (const uint16_t *)src;
00228     end = s + src_size/2;
00229     while (s < end) {
00230         register uint16_t bgr;
00231         bgr = *s++;
00232 #if HAVE_BIGENDIAN
00233         *d++ = 255;
00234         *d++ = (bgr&0x1F)<<3;
00235         *d++ = (bgr&0x3E0)>>2;
00236         *d++ = (bgr&0x7C00)>>7;
00237 #else
00238         *d++ = (bgr&0x7C00)>>7;
00239         *d++ = (bgr&0x3E0)>>2;
00240         *d++ = (bgr&0x1F)<<3;
00241         *d++ = 255;
00242 #endif
00243     }
00244 }
00245 
00246 void rgb15to24(const uint8_t *src, uint8_t *dst, int src_size)
00247 {
00248     const uint16_t *end;
00249     uint8_t *d = dst;
00250     const uint16_t *s = (const uint16_t *)src;
00251     end = s + src_size/2;
00252     while (s < end) {
00253         register uint16_t bgr;
00254         bgr = *s++;
00255         *d++ = (bgr&0x7C00)>>7;
00256         *d++ = (bgr&0x3E0)>>2;
00257         *d++ = (bgr&0x1F)<<3;
00258     }
00259 }
00260 
00261 void rgb15tobgr16(const uint8_t *src, uint8_t *dst, int src_size)
00262 {
00263     int i;
00264     int num_pixels = src_size >> 1;
00265 
00266     for (i=0; i<num_pixels; i++) {
00267         unsigned rgb = ((const uint16_t*)src)[i];
00268         ((uint16_t*)dst)[i] = ((rgb&0x7C00)>>10) | ((rgb&0x3E0)<<1) | (rgb<<11);
00269     }
00270 }
00271 
00272 void rgb15tobgr15(const uint8_t *src, uint8_t *dst, int src_size)
00273 {
00274     int i;
00275     int num_pixels = src_size >> 1;
00276 
00277     for (i=0; i<num_pixels; i++) {
00278         unsigned br;
00279         unsigned rgb = ((const uint16_t*)src)[i];
00280         br = rgb&0x7c1F;
00281         ((uint16_t*)dst)[i] = (br>>10) | (rgb&0x3E0) | (br<<10);
00282     }
00283 }
00284 
00285 void bgr8torgb8(const uint8_t *src, uint8_t *dst, int src_size)
00286 {
00287     int i;
00288     int num_pixels = src_size;
00289     for (i=0; i<num_pixels; i++) {
00290         unsigned b,g,r;
00291         register uint8_t rgb;
00292         rgb = src[i];
00293         r = (rgb&0x07);
00294         g = (rgb&0x38)>>3;
00295         b = (rgb&0xC0)>>6;
00296         dst[i] = ((b<<1)&0x07) | ((g&0x07)<<3) | ((r&0x03)<<6);
00297     }
00298 }
00299 
00300 #define DEFINE_SHUFFLE_BYTES(a, b, c, d)                                \
00301 void shuffle_bytes_##a##b##c##d(const uint8_t *src, uint8_t *dst, int src_size) \
00302 {                                                                       \
00303     int i;                                                             \
00304                                                                         \
00305     for (i = 0; i < src_size; i+=4) {                                   \
00306         dst[i + 0] = src[i + a];                                        \
00307         dst[i + 1] = src[i + b];                                        \
00308         dst[i + 2] = src[i + c];                                        \
00309         dst[i + 3] = src[i + d];                                        \
00310     }                                                                   \
00311 }
00312 
00313 DEFINE_SHUFFLE_BYTES(0, 3, 2, 1);
00314 DEFINE_SHUFFLE_BYTES(1, 2, 3, 0);
00315 DEFINE_SHUFFLE_BYTES(3, 0, 1, 2);
00316 DEFINE_SHUFFLE_BYTES(3, 2, 1, 0);
00317