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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 rgb12to15(const uint8_t *src, uint8_t *dst, int src_size)
00187 {
00188     const uint16_t *end;
00189     uint16_t *d = (uint16_t *)dst;
00190     const uint16_t *s = (const uint16_t *)src;
00191     uint16_t rgb, r, g, b;
00192     end = s + src_size / 2;
00193     while (s < end) {
00194         rgb = *s++;
00195         r = rgb & 0xF00;
00196         g = rgb & 0x0F0;
00197         b = rgb & 0x00F;
00198         r = (r << 3) | ((r & 0x800) >> 1);
00199         g = (g << 2) | ((g & 0x080) >> 2);
00200         b = (b << 1) | ( b          >> 3);
00201         *d++ = r | g | b;
00202     }
00203 }
00204 
00205 void rgb16to24(const uint8_t *src, uint8_t *dst, int src_size)
00206 {
00207     const uint16_t *end;
00208     uint8_t *d = dst;
00209     const uint16_t *s = (const uint16_t *)src;
00210     end = s + src_size/2;
00211     while (s < end) {
00212         register uint16_t bgr;
00213         bgr = *s++;
00214         *d++ = (bgr&0xF800)>>8;
00215         *d++ = (bgr&0x7E0)>>3;
00216         *d++ = (bgr&0x1F)<<3;
00217     }
00218 }
00219 
00220 void rgb16tobgr16(const uint8_t *src, uint8_t *dst, int src_size)
00221 {
00222     int i;
00223     int num_pixels = src_size >> 1;
00224 
00225     for (i=0; i<num_pixels; i++) {
00226         unsigned rgb = ((const uint16_t*)src)[i];
00227         ((uint16_t*)dst)[i] = (rgb>>11) | (rgb&0x7E0) | (rgb<<11);
00228     }
00229 }
00230 
00231 void rgb16tobgr15(const uint8_t *src, uint8_t *dst, int src_size)
00232 {
00233     int i;
00234     int num_pixels = src_size >> 1;
00235 
00236     for (i=0; i<num_pixels; i++) {
00237         unsigned rgb = ((const uint16_t*)src)[i];
00238         ((uint16_t*)dst)[i] = (rgb>>11) | ((rgb&0x7C0)>>1) | ((rgb&0x1F)<<10);
00239     }
00240 }
00241 
00242 void rgb15tobgr32(const uint8_t *src, uint8_t *dst, int src_size)
00243 {
00244     const uint16_t *end;
00245     uint8_t *d = dst;
00246     const uint16_t *s = (const uint16_t *)src;
00247     end = s + src_size/2;
00248     while (s < end) {
00249         register uint16_t bgr;
00250         bgr = *s++;
00251 #if HAVE_BIGENDIAN
00252         *d++ = 255;
00253         *d++ = (bgr&0x1F)<<3;
00254         *d++ = (bgr&0x3E0)>>2;
00255         *d++ = (bgr&0x7C00)>>7;
00256 #else
00257         *d++ = (bgr&0x7C00)>>7;
00258         *d++ = (bgr&0x3E0)>>2;
00259         *d++ = (bgr&0x1F)<<3;
00260         *d++ = 255;
00261 #endif
00262     }
00263 }
00264 
00265 void rgb15to24(const uint8_t *src, uint8_t *dst, int src_size)
00266 {
00267     const uint16_t *end;
00268     uint8_t *d = dst;
00269     const uint16_t *s = (const uint16_t *)src;
00270     end = s + src_size/2;
00271     while (s < end) {
00272         register uint16_t bgr;
00273         bgr = *s++;
00274         *d++ = (bgr&0x7C00)>>7;
00275         *d++ = (bgr&0x3E0)>>2;
00276         *d++ = (bgr&0x1F)<<3;
00277     }
00278 }
00279 
00280 void rgb15tobgr16(const uint8_t *src, uint8_t *dst, int src_size)
00281 {
00282     int i;
00283     int num_pixels = src_size >> 1;
00284 
00285     for (i=0; i<num_pixels; i++) {
00286         unsigned rgb = ((const uint16_t*)src)[i];
00287         ((uint16_t*)dst)[i] = ((rgb&0x7C00)>>10) | ((rgb&0x3E0)<<1) | (rgb<<11);
00288     }
00289 }
00290 
00291 void rgb15tobgr15(const uint8_t *src, uint8_t *dst, int src_size)
00292 {
00293     int i;
00294     int num_pixels = src_size >> 1;
00295 
00296     for (i=0; i<num_pixels; i++) {
00297         unsigned br;
00298         unsigned rgb = ((const uint16_t*)src)[i];
00299         br = rgb&0x7c1F;
00300         ((uint16_t*)dst)[i] = (br>>10) | (rgb&0x3E0) | (br<<10);
00301     }
00302 }
00303 
00304 void rgb12tobgr12(const uint8_t *src, uint8_t *dst, int src_size)
00305 {
00306     uint16_t *d = (uint16_t*)dst;
00307     uint16_t *s = (uint16_t*)src;
00308     int i;
00309     int num_pixels = src_size >> 1;
00310 
00311     for (i = 0; i < num_pixels; i++) {
00312         unsigned rgb = s[i];
00313         d[i] = (rgb << 8 | rgb & 0xF0 | rgb >> 8) & 0xFFF;
00314     }
00315 }
00316 
00317 void bgr8torgb8(const uint8_t *src, uint8_t *dst, int src_size)
00318 {
00319     int i;
00320     int num_pixels = src_size;
00321     for (i=0; i<num_pixels; i++) {
00322         unsigned b,g,r;
00323         register uint8_t rgb;
00324         rgb = src[i];
00325         r = (rgb&0x07);
00326         g = (rgb&0x38)>>3;
00327         b = (rgb&0xC0)>>6;
00328         dst[i] = ((b<<1)&0x07) | ((g&0x07)<<3) | ((r&0x03)<<6);
00329     }
00330 }
00331 
00332 #define DEFINE_SHUFFLE_BYTES(a, b, c, d)                                \
00333 void shuffle_bytes_##a##b##c##d(const uint8_t *src, uint8_t *dst, int src_size) \
00334 {                                                                       \
00335     int i;                                                             \
00336                                                                         \
00337     for (i = 0; i < src_size; i+=4) {                                   \
00338         dst[i + 0] = src[i + a];                                        \
00339         dst[i + 1] = src[i + b];                                        \
00340         dst[i + 2] = src[i + c];                                        \
00341         dst[i + 3] = src[i + d];                                        \
00342     }                                                                   \
00343 }
00344 
00345 DEFINE_SHUFFLE_BYTES(0, 3, 2, 1)
00346 DEFINE_SHUFFLE_BYTES(1, 2, 3, 0)
00347 DEFINE_SHUFFLE_BYTES(3, 0, 1, 2)
00348 DEFINE_SHUFFLE_BYTES(3, 2, 1, 0)
00349 
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