FFmpeg: libswscale/swscale_unscaled.c Source File

00001 /*
00002  * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #include <inttypes.h>
00022 #include <string.h>
00023 #include <math.h>
00024 #include <stdio.h>
00025 #include "config.h"
00026 #include <assert.h>
00027 #include "swscale.h"
00028 #include "swscale_internal.h"
00029 #include "rgb2rgb.h"
00030 #include "libavutil/intreadwrite.h"
00031 #include "libavutil/cpu.h"
00032 #include "libavutil/avutil.h"
00033 #include "libavutil/mathematics.h"
00034 #include "libavutil/bswap.h"
00035 #include "libavutil/pixdesc.h"
00036 
00037 #define RGB2YUV_SHIFT 15
00038 #define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))
00039 #define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00040 #define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00041 #define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))
00042 #define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00043 #define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00044 #define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))
00045 #define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00046 #define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00047 
00048 static void fillPlane(uint8_t* plane, int stride, int width, int height, int y, uint8_t val)
00049 {
00050     int i;
00051     uint8_t *ptr = plane + stride*y;
00052     for (i=0; i<height; i++) {
00053         memset(ptr, val, width);
00054         ptr += stride;
00055     }
00056 }
00057 
00058 static void copyPlane(const uint8_t *src, int srcStride,
00059                       int srcSliceY, int srcSliceH, int width,
00060                       uint8_t *dst, int dstStride)
00061 {
00062     dst += dstStride * srcSliceY;
00063     if (dstStride == srcStride && srcStride > 0) {
00064         memcpy(dst, src, srcSliceH * dstStride);
00065     } else {
00066         int i;
00067         for (i=0; i<srcSliceH; i++) {
00068             memcpy(dst, src, width);
00069             src += srcStride;
00070             dst += dstStride;
00071         }
00072     }
00073 }
00074 
00075 static int planarToNv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00076                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
00077 {
00078     uint8_t *dst = dstParam[1] + dstStride[1]*srcSliceY/2;
00079 
00080     copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
00081               dstParam[0], dstStride[0]);
00082 
00083     if (c->dstFormat == PIX_FMT_NV12)
00084         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);
00085     else
00086         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);
00087 
00088     return srcSliceH;
00089 }
00090 
00091 static int planarToYuy2Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00092                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
00093 {
00094     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
00095 
00096     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);
00097 
00098     return srcSliceH;
00099 }
00100 
00101 static int planarToUyvyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00102                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
00103 {
00104     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
00105 
00106     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);
00107 
00108     return srcSliceH;
00109 }
00110 
00111 static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00112                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])
00113 {
00114     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
00115 
00116     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);
00117 
00118     return srcSliceH;
00119 }
00120 
00121 static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00122                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])
00123 {
00124     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
00125 
00126     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);
00127 
00128     return srcSliceH;
00129 }
00130 
00131 static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00132                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
00133 {
00134     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
00135     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;
00136     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;
00137 
00138     yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
00139 
00140     if (dstParam[3])
00141         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
00142 
00143     return srcSliceH;
00144 }
00145 
00146 static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00147                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
00148 {
00149     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
00150     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;
00151     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;
00152 
00153     yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
00154 
00155     return srcSliceH;
00156 }
00157 
00158 static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00159                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
00160 {
00161     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
00162     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;
00163     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;
00164 
00165     uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
00166 
00167     if (dstParam[3])
00168         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
00169 
00170     return srcSliceH;
00171 }
00172 
00173 static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00174                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
00175 {
00176     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
00177     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;
00178     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;
00179 
00180     uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
00181 
00182     return srcSliceH;
00183 }
00184 
00185 static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette)
00186 {
00187     int i;
00188     for (i=0; i<num_pixels; i++)
00189         ((uint32_t *) dst)[i] = ((const uint32_t *)palette)[src[i<<1]] | (src[(i<<1)+1] << 24);
00190 }
00191 
00192 static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette)
00193 {
00194     int i;
00195 
00196     for (i=0; i<num_pixels; i++)
00197         ((uint32_t *) dst)[i] = ((const uint32_t *)palette)[src[i<<1]] | src[(i<<1)+1];
00198 }
00199 
00200 static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette)
00201 {
00202     int i;
00203 
00204     for (i=0; i<num_pixels; i++) {
00205         //FIXME slow?
00206         dst[0]= palette[src[i<<1]*4+0];
00207         dst[1]= palette[src[i<<1]*4+1];
00208         dst[2]= palette[src[i<<1]*4+2];
00209         dst+= 3;
00210     }
00211 }
00212 
00213 static int palToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00214                            int srcSliceH, uint8_t* dst[], int dstStride[])
00215 {
00216     const enum PixelFormat srcFormat= c->srcFormat;
00217     const enum PixelFormat dstFormat= c->dstFormat;
00218     void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
00219                  const uint8_t *palette)=NULL;
00220     int i;
00221     uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
00222     const uint8_t *srcPtr= src[0];
00223 
00224     if (srcFormat == PIX_FMT_GRAY8A) {
00225         switch (dstFormat) {
00226         case PIX_FMT_RGB32  : conv = gray8aToPacked32; break;
00227         case PIX_FMT_BGR32  : conv = gray8aToPacked32; break;
00228         case PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
00229         case PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
00230         case PIX_FMT_RGB24  : conv = gray8aToPacked24; break;
00231         case PIX_FMT_BGR24  : conv = gray8aToPacked24; break;
00232         }
00233     } else if (usePal(srcFormat)) {
00234         switch (dstFormat) {
00235         case PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;
00236         case PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;
00237         case PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
00238         case PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
00239         case PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;
00240         case PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;
00241         }
00242     }
00243 
00244     if (!conv)
00245         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
00246                av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
00247     else {
00248         for (i=0; i<srcSliceH; i++) {
00249             conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
00250             srcPtr+= srcStride[0];
00251             dstPtr+= dstStride[0];
00252         }
00253     }
00254 
00255     return srcSliceH;
00256 }
00257 
00258 static void gbr24ptopacked24(const uint8_t* src[], int srcStride[], uint8_t* dst, int dstStride, int srcSliceH, int width)
00259 {
00260     int x, h, i;
00261     for (h = 0; h < srcSliceH; h++) {
00262         uint8_t *dest = dst + dstStride * h;
00263         for (x = 0; x < width; x++) {
00264             *dest++ = src[0][x];
00265             *dest++ = src[1][x];
00266             *dest++ = src[2][x];
00267         }
00268 
00269         for (i = 0; i < 3; i++)
00270             src[i] += srcStride[i];
00271     }
00272 }
00273 
00274 static void gbr24ptopacked32(const uint8_t* src[], int srcStride[], uint8_t* dst, int dstStride, int srcSliceH, int alpha_first, int width)
00275 {
00276     int x, h, i;
00277     for (h = 0; h < srcSliceH; h++) {
00278         uint8_t *dest = dst + dstStride * h;
00279 
00280         if (alpha_first) {
00281             for (x = 0; x < width; x++) {
00282                 *dest++ = 0xff;
00283                 *dest++ = src[0][x];
00284                 *dest++ = src[1][x];
00285                 *dest++ = src[2][x];
00286             }
00287         } else {
00288             for (x = 0; x < width; x++) {
00289                 *dest++ = src[0][x];
00290                 *dest++ = src[1][x];
00291                 *dest++ = src[2][x];
00292                 *dest++ = 0xff;
00293             }
00294         }
00295 
00296         for (i = 0; i < 3; i++)
00297             src[i] += srcStride[i];
00298     }
00299 }
00300 
00301 static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00302         int srcSliceH, uint8_t* dst[], int dstStride[])
00303 {
00304     int alpha_first = 0;
00305     if (c->srcFormat != PIX_FMT_GBR24P) {
00306         av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
00307               av_get_pix_fmt_name(c->srcFormat), av_get_pix_fmt_name(c->dstFormat));
00308         return srcSliceH;
00309     }
00310 
00311     switch (c->dstFormat) {
00312         case PIX_FMT_BGR24:
00313             gbr24ptopacked24((const uint8_t* []) {src[1], src[0], src[2]}, (int []) {srcStride[1], srcStride[0], srcStride[2]},
00314                   dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, c->srcW);
00315             break;
00316 
00317         case PIX_FMT_RGB24:
00318             gbr24ptopacked24((const uint8_t* []) {src[2], src[0], src[1]}, (int []) {srcStride[2], srcStride[0], srcStride[1]},
00319                   dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, c->srcW);
00320             break;
00321 
00322         case PIX_FMT_ARGB:
00323             alpha_first = 1;
00324         case PIX_FMT_RGBA:
00325             gbr24ptopacked32((const uint8_t* []) {src[2], src[0], src[1]}, (int []) {srcStride[2], srcStride[0], srcStride[1]},
00326                   dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, alpha_first, c->srcW);
00327             break;
00328 
00329         case PIX_FMT_ABGR:
00330             alpha_first = 1;
00331         case PIX_FMT_BGRA:
00332             gbr24ptopacked32((const uint8_t* []) {src[1], src[0], src[2]}, (int []) {srcStride[1], srcStride[0], srcStride[2]},
00333                   dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, alpha_first, c->srcW);
00334             break;
00335 
00336         default:
00337             av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
00338                     av_get_pix_fmt_name(c->srcFormat), av_get_pix_fmt_name(c->dstFormat));
00339     }
00340 
00341     return srcSliceH;
00342 }
00343 
00344 #define isRGBA32(x) (            \
00345            (x) == PIX_FMT_ARGB   \
00346         || (x) == PIX_FMT_RGBA   \
00347         || (x) == PIX_FMT_BGRA   \
00348         || (x) == PIX_FMT_ABGR   \
00349         )
00350 
00351 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
00352 static int rgbToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00353                            int srcSliceH, uint8_t* dst[], int dstStride[])
00354 {
00355     const enum PixelFormat srcFormat= c->srcFormat;
00356     const enum PixelFormat dstFormat= c->dstFormat;
00357     const int srcBpp= (c->srcFormatBpp + 7) >> 3;
00358     const int dstBpp= (c->dstFormatBpp + 7) >> 3;
00359     const int srcId= c->srcFormatBpp >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */
00360     const int dstId= c->dstFormatBpp >> 2;
00361     void (*conv)(const uint8_t *src, uint8_t *dst, int src_size)=NULL;
00362 
00363 #define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == PIX_FMT_##dst)
00364 
00365     if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
00366         if (     CONV_IS(ABGR, RGBA)
00367               || CONV_IS(ARGB, BGRA)
00368               || CONV_IS(BGRA, ARGB)
00369               || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
00370         else if (CONV_IS(ABGR, ARGB)
00371               || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
00372         else if (CONV_IS(ABGR, BGRA)
00373               || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
00374         else if (CONV_IS(BGRA, RGBA)
00375               || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
00376         else if (CONV_IS(BGRA, ABGR)
00377               || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
00378     } else
00379     /* BGR -> BGR */
00380     if (  (isBGRinInt(srcFormat) && isBGRinInt(dstFormat))
00381        || (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
00382         switch(srcId | (dstId<<4)) {
00383         case 0x34: conv= rgb16to15; break;
00384         case 0x36: conv= rgb24to15; break;
00385         case 0x38: conv= rgb32to15; break;
00386         case 0x43: conv= rgb15to16; break;
00387         case 0x46: conv= rgb24to16; break;
00388         case 0x48: conv= rgb32to16; break;
00389         case 0x63: conv= rgb15to24; break;
00390         case 0x64: conv= rgb16to24; break;
00391         case 0x68: conv= rgb32to24; break;
00392         case 0x83: conv= rgb15to32; break;
00393         case 0x84: conv= rgb16to32; break;
00394         case 0x86: conv= rgb24to32; break;
00395         }
00396     } else if (  (isBGRinInt(srcFormat) && isRGBinInt(dstFormat))
00397              || (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
00398         switch(srcId | (dstId<<4)) {
00399         case 0x33: conv= rgb15tobgr15; break;
00400         case 0x34: conv= rgb16tobgr15; break;
00401         case 0x36: conv= rgb24tobgr15; break;
00402         case 0x38: conv= rgb32tobgr15; break;
00403         case 0x43: conv= rgb15tobgr16; break;
00404         case 0x44: conv= rgb16tobgr16; break;
00405         case 0x46: conv= rgb24tobgr16; break;
00406         case 0x48: conv= rgb32tobgr16; break;
00407         case 0x63: conv= rgb15tobgr24; break;
00408         case 0x64: conv= rgb16tobgr24; break;
00409         case 0x66: conv= rgb24tobgr24; break;
00410         case 0x68: conv= rgb32tobgr24; break;
00411         case 0x83: conv= rgb15tobgr32; break;
00412         case 0x84: conv= rgb16tobgr32; break;
00413         case 0x86: conv= rgb24tobgr32; break;
00414         }
00415     }
00416 
00417     if (!conv) {
00418         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
00419                av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
00420     } else {
00421         const uint8_t *srcPtr= src[0];
00422               uint8_t *dstPtr= dst[0];
00423         if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) && !isRGBA32(dstFormat))
00424             srcPtr += ALT32_CORR;
00425 
00426         if ((dstFormat == PIX_FMT_RGB32_1 || dstFormat == PIX_FMT_BGR32_1) && !isRGBA32(srcFormat))
00427             dstPtr += ALT32_CORR;
00428 
00429         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0 && !(srcStride[0] % srcBpp))
00430             conv(srcPtr, dstPtr + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);
00431         else {
00432             int i;
00433             dstPtr += dstStride[0]*srcSliceY;
00434 
00435             for (i=0; i<srcSliceH; i++) {
00436                 conv(srcPtr, dstPtr, c->srcW*srcBpp);
00437                 srcPtr+= srcStride[0];
00438                 dstPtr+= dstStride[0];
00439             }
00440         }
00441     }
00442     return srcSliceH;
00443 }
00444 
00445 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00446                               int srcSliceH, uint8_t* dst[], int dstStride[])
00447 {
00448     rgb24toyv12(
00449         src[0],
00450         dst[0]+ srcSliceY    *dstStride[0],
00451         dst[1]+(srcSliceY>>1)*dstStride[1],
00452         dst[2]+(srcSliceY>>1)*dstStride[2],
00453         c->srcW, srcSliceH,
00454         dstStride[0], dstStride[1], srcStride[0]);
00455     if (dst[3])
00456         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
00457     return srcSliceH;
00458 }
00459 
00460 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00461                              int srcSliceH, uint8_t* dst[], int dstStride[])
00462 {
00463     copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
00464               dst[0], dstStride[0]);
00465 
00466     planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,
00467              srcSliceH >> 2, srcStride[1], dstStride[1]);
00468     planar2x(src[2], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,
00469              srcSliceH >> 2, srcStride[2], dstStride[2]);
00470     if (dst[3])
00471         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
00472     return srcSliceH;
00473 }
00474 
00475 /* unscaled copy like stuff (assumes nearly identical formats) */
00476 static int packedCopyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00477                              int srcSliceH, uint8_t* dst[], int dstStride[])
00478 {
00479     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)
00480         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);
00481     else {
00482         int i;
00483         const uint8_t *srcPtr= src[0];
00484         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
00485         int length=0;
00486 
00487         /* universal length finder */
00488         while(length+c->srcW <= FFABS(dstStride[0])
00489            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;
00490         assert(length!=0);
00491 
00492         for (i=0; i<srcSliceH; i++) {
00493             memcpy(dstPtr, srcPtr, length);
00494             srcPtr+= srcStride[0];
00495             dstPtr+= dstStride[0];
00496         }
00497     }
00498     return srcSliceH;
00499 }
00500 
00501 #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
00502     uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
00503     int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
00504     for (i = 0; i < height; i++) {\
00505         const uint8_t *dither= dithers[src_depth-9][i&7];\
00506         for (j = 0; j < length-7; j+=8){\
00507             dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
00508             dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
00509             dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
00510             dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
00511             dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
00512             dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
00513             dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
00514             dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
00515         }\
00516         for (; j < length; j++)\
00517             dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
00518         dst += dstStride;\
00519         src += srcStride;\
00520     }
00521 
00522 
00523 static int planarCopyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
00524                              int srcSliceH, uint8_t* dst[], int dstStride[])
00525 {
00526     int plane, i, j;
00527     for (plane=0; plane<4; plane++) {
00528         int length= (plane==0 || plane==3) ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);
00529         int y=      (plane==0 || plane==3) ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);
00530         int height= (plane==0 || plane==3) ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);
00531         const uint8_t *srcPtr= src[plane];
00532         uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;
00533         int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
00534 
00535         if (!dst[plane]) continue;
00536         // ignore palette for GRAY8
00537         if (plane == 1 && !dst[2]) continue;
00538         if (!src[plane] || (plane == 1 && !src[2])) {
00539             if(is16BPS(c->dstFormat))
00540                 length*=2;
00541             fillPlane(dst[plane], dstStride[plane], length, height, y, (plane==3) ? 255 : 128);
00542         } else {
00543             if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
00544                || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
00545             ) {
00546                 const int src_depth = av_pix_fmt_descriptors[c->srcFormat].comp[plane].depth_minus1+1;
00547                 const int dst_depth = av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1+1;
00548                 const uint16_t *srcPtr2 = (const uint16_t*)srcPtr;
00549                 uint16_t *dstPtr2 = (uint16_t*)dstPtr;
00550 
00551                 if (dst_depth == 8) {
00552                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
00553                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
00554                     } else {
00555                         DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
00556                     }
00557                 } else if (src_depth == 8) {
00558                     for (i = 0; i < height; i++) {
00559                         #define COPY816(w)\
00560                         if(shiftonly){\
00561                             for (j = 0; j < length; j++)\
00562                                 w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
00563                         }else{\
00564                             for (j = 0; j < length; j++)\
00565                                 w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
00566                                                (srcPtr[j]>>(2*8-dst_depth)));\
00567                         }
00568                         if(isBE(c->dstFormat)){
00569                             COPY816(AV_WB16)
00570                         } else {
00571                             COPY816(AV_WL16)
00572                         }
00573                         dstPtr2 += dstStride[plane]/2;
00574                         srcPtr  += srcStride[plane];
00575                     }
00576                 } else if (src_depth <= dst_depth) {
00577                     for (i = 0; i < height; i++) {
00578 #define COPY_UP(r,w) \
00579     if(shiftonly){\
00580         for (j = 0; j < length; j++){ \
00581             unsigned int v= r(&srcPtr2[j]);\
00582             w(&dstPtr2[j], v<<(dst_depth-src_depth));\
00583         }\
00584     }else{\
00585         for (j = 0; j < length; j++){ \
00586             unsigned int v= r(&srcPtr2[j]);\
00587             w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
00588                         (v>>(2*src_depth-dst_depth)));\
00589         }\
00590     }
00591                         if(isBE(c->srcFormat)){
00592                             if(isBE(c->dstFormat)){
00593                                 COPY_UP(AV_RB16, AV_WB16)
00594                             } else {
00595                                 COPY_UP(AV_RB16, AV_WL16)
00596                             }
00597                         } else {
00598                             if(isBE(c->dstFormat)){
00599                                 COPY_UP(AV_RL16, AV_WB16)
00600                             } else {
00601                                 COPY_UP(AV_RL16, AV_WL16)
00602                             }
00603                         }
00604                         dstPtr2 += dstStride[plane]/2;
00605                         srcPtr2 += srcStride[plane]/2;
00606                     }
00607                 } else {
00608                     if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
00609                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
00610                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
00611                         } else {
00612                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
00613                         }
00614                     }else{
00615                         if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
00616                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
00617                         } else {
00618                             DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
00619                         }
00620                     }
00621                 }
00622             } else if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat)
00623                   && isBE(c->srcFormat) != isBE(c->dstFormat)) {
00624 
00625                 for (i=0; i<height; i++) {
00626                     for (j=0; j<length; j++)
00627                         ((uint16_t*)dstPtr)[j] = av_bswap16(((const uint16_t*)srcPtr)[j]);
00628                     srcPtr+= srcStride[plane];
00629                     dstPtr+= dstStride[plane];
00630                 }
00631             } else if (dstStride[plane] == srcStride[plane] &&
00632                        srcStride[plane] > 0 && srcStride[plane] == length) {
00633                 memcpy(dst[plane] + dstStride[plane]*y, src[plane],
00634                        height*dstStride[plane]);
00635             } else {
00636                 if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
00637                     length*=2;
00638                 for (i=0; i<height; i++) {
00639                     memcpy(dstPtr, srcPtr, length);
00640                     srcPtr+= srcStride[plane];
00641                     dstPtr+= dstStride[plane];
00642                 }
00643             }
00644         }
00645     }
00646     return srcSliceH;
00647 }
00648 
00649 void ff_get_unscaled_swscale(SwsContext *c)
00650 {
00651     const enum PixelFormat srcFormat = c->srcFormat;
00652     const enum PixelFormat dstFormat = c->dstFormat;
00653     const int flags = c->flags;
00654     const int dstH = c->dstH;
00655     int needsDither;
00656 
00657     needsDither= isAnyRGB(dstFormat)
00658         &&  c->dstFormatBpp < 24
00659         && (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
00660 
00661     /* yv12_to_nv12 */
00662     if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {
00663         c->swScale= planarToNv12Wrapper;
00664     }
00665     /* yuv2bgr */
00666     if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P || srcFormat==PIX_FMT_YUVA420P) && isAnyRGB(dstFormat)
00667         && !(flags & SWS_ACCURATE_RND) && !(dstH&1)) {
00668         c->swScale= ff_yuv2rgb_get_func_ptr(c);
00669     }
00670 
00671     if (srcFormat==PIX_FMT_YUV410P && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_BITEXACT)) {
00672         c->swScale= yvu9ToYv12Wrapper;
00673     }
00674 
00675     /* bgr24toYV12 */
00676     if (srcFormat==PIX_FMT_BGR24 && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_ACCURATE_RND))
00677         c->swScale= bgr24ToYv12Wrapper;
00678 
00679     /* RGB/BGR -> RGB/BGR (no dither needed forms) */
00680     if (   isAnyRGB(srcFormat)
00681         && isAnyRGB(dstFormat)
00682         && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8
00683         && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8
00684         && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4
00685         && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4
00686         && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE
00687         && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE
00688         && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK
00689         && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE
00690         && srcFormat != PIX_FMT_RGB48LE   && dstFormat != PIX_FMT_RGB48LE
00691         && srcFormat != PIX_FMT_RGB48BE   && dstFormat != PIX_FMT_RGB48BE
00692         && srcFormat != PIX_FMT_BGR48LE   && dstFormat != PIX_FMT_BGR48LE
00693         && srcFormat != PIX_FMT_BGR48BE   && dstFormat != PIX_FMT_BGR48BE
00694         && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
00695         c->swScale= rgbToRgbWrapper;
00696 
00697 #define isByteRGB(f) (\
00698         f == PIX_FMT_RGB32   ||\
00699         f == PIX_FMT_RGB32_1 ||\
00700         f == PIX_FMT_RGB24   ||\
00701         f == PIX_FMT_BGR32   ||\
00702         f == PIX_FMT_BGR32_1 ||\
00703         f == PIX_FMT_BGR24)
00704 
00705     if (isAnyRGB(srcFormat) && isPlanar(srcFormat) && isByteRGB(dstFormat))
00706         c->swScale= planarRgbToRgbWrapper;
00707 
00708     if (usePal(srcFormat) && isByteRGB(dstFormat))
00709         c->swScale= palToRgbWrapper;
00710 
00711     if (srcFormat == PIX_FMT_YUV422P) {
00712         if (dstFormat == PIX_FMT_YUYV422)
00713             c->swScale= yuv422pToYuy2Wrapper;
00714         else if (dstFormat == PIX_FMT_UYVY422)
00715             c->swScale= yuv422pToUyvyWrapper;
00716     }
00717 
00718     /* LQ converters if -sws 0 or -sws 4*/
00719     if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
00720         /* yv12_to_yuy2 */
00721         if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {
00722             if (dstFormat == PIX_FMT_YUYV422)
00723                 c->swScale= planarToYuy2Wrapper;
00724             else if (dstFormat == PIX_FMT_UYVY422)
00725                 c->swScale= planarToUyvyWrapper;
00726         }
00727     }
00728     if(srcFormat == PIX_FMT_YUYV422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
00729         c->swScale= yuyvToYuv420Wrapper;
00730     if(srcFormat == PIX_FMT_UYVY422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
00731         c->swScale= uyvyToYuv420Wrapper;
00732     if(srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)
00733         c->swScale= yuyvToYuv422Wrapper;
00734     if(srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)
00735         c->swScale= uyvyToYuv422Wrapper;
00736 
00737     /* simple copy */
00738     if (  srcFormat == dstFormat
00739         || (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P)
00740         || (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P)
00741         || (isPlanarYUV(srcFormat) && isGray(dstFormat))
00742         || (isPlanarYUV(dstFormat) && isGray(srcFormat))
00743         || (isGray(dstFormat) && isGray(srcFormat))
00744         || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)
00745             && c->chrDstHSubSample == c->chrSrcHSubSample
00746             && c->chrDstVSubSample == c->chrSrcVSubSample
00747             && dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21
00748             && srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))
00749     {
00750         if (isPacked(c->srcFormat))
00751             c->swScale= packedCopyWrapper;
00752         else /* Planar YUV or gray */
00753             c->swScale= planarCopyWrapper;
00754     }
00755 
00756     if (ARCH_BFIN)
00757         ff_bfin_get_unscaled_swscale(c);
00758     if (HAVE_ALTIVEC)
00759         ff_swscale_get_unscaled_altivec(c);
00760 }
00761 
00762 static void reset_ptr(const uint8_t* src[], int format)
00763 {
00764     if(!isALPHA(format))
00765         src[3]=NULL;
00766     if (!isPlanar(format)) {
00767         src[3]=src[2]=NULL;
00768 
00769         if (!usePal(format))
00770             src[1]= NULL;
00771     }
00772 }
00773 
00774 static int check_image_pointers(const uint8_t * const data[4], enum PixelFormat pix_fmt,
00775                                 const int linesizes[4])
00776 {
00777     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
00778     int i;
00779 
00780     for (i = 0; i < 4; i++) {
00781         int plane = desc->comp[i].plane;
00782         if (!data[plane] || !linesizes[plane])
00783             return 0;
00784     }
00785 
00786     return 1;
00787 }
00788 
00793 int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t* const srcSlice[],
00794               const int srcStride[], int srcSliceY, int srcSliceH,
00795               uint8_t* const dst[], const int dstStride[])
00796 {
00797     int i;
00798     const uint8_t* src2[4]= {srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3]};
00799     uint8_t* dst2[4]= {dst[0], dst[1], dst[2], dst[3]};
00800 
00801     // do not mess up sliceDir if we have a "trailing" 0-size slice
00802     if (srcSliceH == 0)
00803         return 0;
00804 
00805     if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
00806         av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
00807         return 0;
00808     }
00809     if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
00810         av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
00811         return 0;
00812     }
00813 
00814     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
00815         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
00816         return 0;
00817     }
00818     if (c->sliceDir == 0) {
00819         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
00820     }
00821 
00822     if (usePal(c->srcFormat)) {
00823         for (i=0; i<256; i++) {
00824             int p, r, g, b, y, u, v, a = 0xff;
00825             if(c->srcFormat == PIX_FMT_PAL8) {
00826                 p=((const uint32_t*)(srcSlice[1]))[i];
00827                 a= (p>>24)&0xFF;
00828                 r= (p>>16)&0xFF;
00829                 g= (p>> 8)&0xFF;
00830                 b=  p     &0xFF;
00831             } else if(c->srcFormat == PIX_FMT_RGB8) {
00832                 r= (i>>5    )*36;
00833                 g= ((i>>2)&7)*36;
00834                 b= (i&3     )*85;
00835             } else if(c->srcFormat == PIX_FMT_BGR8) {
00836                 b= (i>>6    )*85;
00837                 g= ((i>>3)&7)*36;
00838                 r= (i&7     )*36;
00839             } else if(c->srcFormat == PIX_FMT_RGB4_BYTE) {
00840                 r= (i>>3    )*255;
00841                 g= ((i>>1)&3)*85;
00842                 b= (i&1     )*255;
00843             } else if(c->srcFormat == PIX_FMT_GRAY8 || c->srcFormat == PIX_FMT_GRAY8A) {
00844                 r = g = b = i;
00845             } else {
00846                 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);
00847                 b= (i>>3    )*255;
00848                 g= ((i>>1)&3)*85;
00849                 r= (i&1     )*255;
00850             }
00851             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
00852             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
00853             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
00854             c->pal_yuv[i]= y + (u<<8) + (v<<16) + (a<<24);
00855 
00856             switch(c->dstFormat) {
00857             case PIX_FMT_BGR32:
00858 #if !HAVE_BIGENDIAN
00859             case PIX_FMT_RGB24:
00860 #endif
00861                 c->pal_rgb[i]=  r + (g<<8) + (b<<16) + (a<<24);
00862                 break;
00863             case PIX_FMT_BGR32_1:
00864 #if HAVE_BIGENDIAN
00865             case PIX_FMT_BGR24:
00866 #endif
00867                 c->pal_rgb[i]= a + (r<<8) + (g<<16) + (b<<24);
00868                 break;
00869             case PIX_FMT_RGB32_1:
00870 #if HAVE_BIGENDIAN
00871             case PIX_FMT_RGB24:
00872 #endif
00873                 c->pal_rgb[i]= a + (b<<8) + (g<<16) + (r<<24);
00874                 break;
00875             case PIX_FMT_RGB32:
00876 #if !HAVE_BIGENDIAN
00877             case PIX_FMT_BGR24:
00878 #endif
00879             default:
00880                 c->pal_rgb[i]=  b + (g<<8) + (r<<16) + (a<<24);
00881             }
00882         }
00883     }
00884 
00885     // copy strides, so they can safely be modified
00886     if (c->sliceDir == 1) {
00887         // slices go from top to bottom
00888         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2], srcStride[3]};
00889         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2], dstStride[3]};
00890 
00891         reset_ptr(src2, c->srcFormat);
00892         reset_ptr((void*)dst2, c->dstFormat);
00893 
00894         /* reset slice direction at end of frame */
00895         if (srcSliceY + srcSliceH == c->srcH)
00896             c->sliceDir = 0;
00897 
00898         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2);
00899     } else {
00900         // slices go from bottom to top => we flip the image internally
00901         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3]};
00902         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3]};
00903 
00904         src2[0] += (srcSliceH-1)*srcStride[0];
00905         if (!usePal(c->srcFormat))
00906             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];
00907         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];
00908         src2[3] += (srcSliceH-1)*srcStride[3];
00909         dst2[0] += ( c->dstH                      -1)*dstStride[0];
00910         dst2[1] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1];
00911         dst2[2] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2];
00912         dst2[3] += ( c->dstH                      -1)*dstStride[3];
00913 
00914         reset_ptr(src2, c->srcFormat);
00915         reset_ptr((void*)dst2, c->dstFormat);
00916 
00917         /* reset slice direction at end of frame */
00918         if (!srcSliceY)
00919             c->sliceDir = 0;
00920 
00921         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);
00922     }
00923 }
00924 
00925 /* Convert the palette to the same packed 32-bit format as the palette */
00926 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette)
00927 {
00928     int i;
00929 
00930     for (i=0; i<num_pixels; i++)
00931         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
00932 }
00933 
00934 /* Palette format: ABCD -> dst format: ABC */
00935 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette)
00936 {
00937     int i;
00938 
00939     for (i=0; i<num_pixels; i++) {
00940         //FIXME slow?
00941         dst[0]= palette[src[i]*4+0];
00942         dst[1]= palette[src[i]*4+1];
00943         dst[2]= palette[src[i]*4+2];
00944         dst+= 3;
00945     }
00946 }