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libswscale/swscale.c

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00001 /*
00002  * Copyright (C) 2001-2003 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 /*
00022   supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR32_1, BGR24, BGR16, BGR15, RGB32, RGB32_1, RGB24, Y8/Y800, YVU9/IF09, PAL8
00023   supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09
00024   {BGR,RGB}{1,4,8,15,16} support dithering
00025 
00026   unscaled special converters (YV12=I420=IYUV, Y800=Y8)
00027   YV12 -> {BGR,RGB}{1,4,8,12,15,16,24,32}
00028   x -> x
00029   YUV9 -> YV12
00030   YUV9/YV12 -> Y800
00031   Y800 -> YUV9/YV12
00032   BGR24 -> BGR32 & RGB24 -> RGB32
00033   BGR32 -> BGR24 & RGB32 -> RGB24
00034   BGR15 -> BGR16
00035 */
00036 
00037 /*
00038 tested special converters (most are tested actually, but I did not write it down ...)
00039  YV12 -> BGR12/BGR16
00040  YV12 -> YV12
00041  BGR15 -> BGR16
00042  BGR16 -> BGR16
00043  YVU9 -> YV12
00044 
00045 untested special converters
00046   YV12/I420 -> BGR15/BGR24/BGR32 (it is the yuv2rgb stuff, so it should be OK)
00047   YV12/I420 -> YV12/I420
00048   YUY2/BGR15/BGR24/BGR32/RGB24/RGB32 -> same format
00049   BGR24 -> BGR32 & RGB24 -> RGB32
00050   BGR32 -> BGR24 & RGB32 -> RGB24
00051   BGR24 -> YV12
00052 */
00053 
00054 #include <inttypes.h>
00055 #include <string.h>
00056 #include <math.h>
00057 #include <stdio.h>
00058 #include "config.h"
00059 #include <assert.h>
00060 #include "swscale.h"
00061 #include "swscale_internal.h"
00062 #include "rgb2rgb.h"
00063 #include "libavutil/intreadwrite.h"
00064 #include "libavutil/x86_cpu.h"
00065 #include "libavutil/avutil.h"
00066 #include "libavutil/bswap.h"
00067 #include "libavutil/pixdesc.h"
00068 
00069 #undef MOVNTQ
00070 #undef PAVGB
00071 
00072 //#undef HAVE_MMX2
00073 //#define HAVE_AMD3DNOW
00074 //#undef HAVE_MMX
00075 //#undef ARCH_X86
00076 #define DITHER1XBPP
00077 
00078 #define FAST_BGR2YV12 // use 7 bit coefficients instead of 15 bit
00079 
00080 #ifdef M_PI
00081 #define PI M_PI
00082 #else
00083 #define PI 3.14159265358979323846
00084 #endif
00085 
00086 #define isPacked(x)         (       \
00087            (x)==PIX_FMT_PAL8        \
00088         || (x)==PIX_FMT_YUYV422     \
00089         || (x)==PIX_FMT_UYVY422     \
00090         || isAnyRGB(x)              \
00091     )
00092 
00093 #define RGB2YUV_SHIFT 15
00094 #define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))
00095 #define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00096 #define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00097 #define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))
00098 #define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00099 #define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00100 #define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))
00101 #define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00102 #define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))
00103 
00104 static const double rgb2yuv_table[8][9]={
00105     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},
00106     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},
00107     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},
00108     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},
00109     {0.59  , 0.11  , 0.30  , -0.331, 0.5, -0.169, -0.421, -0.079, 0.5}, //FCC
00110     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},
00111     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5}, //SMPTE 170M
00112     {0.701 , 0.087 , 0.212 , -0.384, 0.5  -0.116, -0.445, -0.055, 0.5}, //SMPTE 240M
00113 };
00114 
00115 /*
00116 NOTES
00117 Special versions: fast Y 1:1 scaling (no interpolation in y direction)
00118 
00119 TODO
00120 more intelligent misalignment avoidance for the horizontal scaler
00121 write special vertical cubic upscale version
00122 optimize C code (YV12 / minmax)
00123 add support for packed pixel YUV input & output
00124 add support for Y8 output
00125 optimize BGR24 & BGR32
00126 add BGR4 output support
00127 write special BGR->BGR scaler
00128 */
00129 
00130 #if ARCH_X86
00131 DECLARE_ASM_CONST(8, uint64_t, bF8)=       0xF8F8F8F8F8F8F8F8LL;
00132 DECLARE_ASM_CONST(8, uint64_t, bFC)=       0xFCFCFCFCFCFCFCFCLL;
00133 DECLARE_ASM_CONST(8, uint64_t, w10)=       0x0010001000100010LL;
00134 DECLARE_ASM_CONST(8, uint64_t, w02)=       0x0002000200020002LL;
00135 DECLARE_ASM_CONST(8, uint64_t, bm00001111)=0x00000000FFFFFFFFLL;
00136 DECLARE_ASM_CONST(8, uint64_t, bm00000111)=0x0000000000FFFFFFLL;
00137 DECLARE_ASM_CONST(8, uint64_t, bm11111000)=0xFFFFFFFFFF000000LL;
00138 DECLARE_ASM_CONST(8, uint64_t, bm01010101)=0x00FF00FF00FF00FFLL;
00139 
00140 const DECLARE_ALIGNED(8, uint64_t, ff_dither4)[2] = {
00141         0x0103010301030103LL,
00142         0x0200020002000200LL,};
00143 
00144 const DECLARE_ALIGNED(8, uint64_t, ff_dither8)[2] = {
00145         0x0602060206020602LL,
00146         0x0004000400040004LL,};
00147 
00148 DECLARE_ASM_CONST(8, uint64_t, b16Mask)=   0x001F001F001F001FLL;
00149 DECLARE_ASM_CONST(8, uint64_t, g16Mask)=   0x07E007E007E007E0LL;
00150 DECLARE_ASM_CONST(8, uint64_t, r16Mask)=   0xF800F800F800F800LL;
00151 DECLARE_ASM_CONST(8, uint64_t, b15Mask)=   0x001F001F001F001FLL;
00152 DECLARE_ASM_CONST(8, uint64_t, g15Mask)=   0x03E003E003E003E0LL;
00153 DECLARE_ASM_CONST(8, uint64_t, r15Mask)=   0x7C007C007C007C00LL;
00154 
00155 DECLARE_ALIGNED(8, const uint64_t, ff_M24A)         = 0x00FF0000FF0000FFLL;
00156 DECLARE_ALIGNED(8, const uint64_t, ff_M24B)         = 0xFF0000FF0000FF00LL;
00157 DECLARE_ALIGNED(8, const uint64_t, ff_M24C)         = 0x0000FF0000FF0000LL;
00158 
00159 #ifdef FAST_BGR2YV12
00160 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000000210041000DULL;
00161 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000FFEEFFDC0038ULL;
00162 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00000038FFD2FFF8ULL;
00163 #else
00164 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000020E540830C8BULL;
00165 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000ED0FDAC23831ULL;
00166 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00003831D0E6F6EAULL;
00167 #endif /* FAST_BGR2YV12 */
00168 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YOffset)  = 0x1010101010101010ULL;
00169 DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UVOffset) = 0x8080808080808080ULL;
00170 DECLARE_ALIGNED(8, const uint64_t, ff_w1111)        = 0x0001000100010001ULL;
00171 
00172 DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toY1Coeff) = 0x0C88000040870C88ULL;
00173 DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toY2Coeff) = 0x20DE4087000020DEULL;
00174 DECLARE_ASM_CONST(8, uint64_t, ff_rgb24toY1Coeff) = 0x20DE0000408720DEULL;
00175 DECLARE_ASM_CONST(8, uint64_t, ff_rgb24toY2Coeff) = 0x0C88408700000C88ULL;
00176 DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toYOffset) = 0x0008400000084000ULL;
00177 
00178 DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUV)[2][4] = {
00179     {0x38380000DAC83838ULL, 0xECFFDAC80000ECFFULL, 0xF6E40000D0E3F6E4ULL, 0x3838D0E300003838ULL},
00180     {0xECFF0000DAC8ECFFULL, 0x3838DAC800003838ULL, 0x38380000D0E33838ULL, 0xF6E4D0E30000F6E4ULL},
00181 };
00182 
00183 DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUVOffset)= 0x0040400000404000ULL;
00184 
00185 #endif /* ARCH_X86 */
00186 
00187 DECLARE_ALIGNED(8, static const uint8_t, dither_2x2_4)[2][8]={
00188 {  1,   3,   1,   3,   1,   3,   1,   3, },
00189 {  2,   0,   2,   0,   2,   0,   2,   0, },
00190 };
00191 
00192 DECLARE_ALIGNED(8, static const uint8_t, dither_2x2_8)[2][8]={
00193 {  6,   2,   6,   2,   6,   2,   6,   2, },
00194 {  0,   4,   0,   4,   0,   4,   0,   4, },
00195 };
00196 
00197 DECLARE_ALIGNED(8, const uint8_t, dither_4x4_16)[4][8]={
00198 {  8,   4,  11,   7,   8,   4,  11,   7, },
00199 {  2,  14,   1,  13,   2,  14,   1,  13, },
00200 { 10,   6,   9,   5,  10,   6,   9,   5, },
00201 {  0,  12,   3,  15,   0,  12,   3,  15, },
00202 };
00203 
00204 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_32)[8][8]={
00205 { 17,   9,  23,  15,  16,   8,  22,  14, },
00206 {  5,  29,   3,  27,   4,  28,   2,  26, },
00207 { 21,  13,  19,  11,  20,  12,  18,  10, },
00208 {  0,  24,   6,  30,   1,  25,   7,  31, },
00209 { 16,   8,  22,  14,  17,   9,  23,  15, },
00210 {  4,  28,   2,  26,   5,  29,   3,  27, },
00211 { 20,  12,  18,  10,  21,  13,  19,  11, },
00212 {  1,  25,   7,  31,   0,  24,   6,  30, },
00213 };
00214 
00215 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_73)[8][8]={
00216 {  0,  55,  14,  68,   3,  58,  17,  72, },
00217 { 37,  18,  50,  32,  40,  22,  54,  35, },
00218 {  9,  64,   5,  59,  13,  67,   8,  63, },
00219 { 46,  27,  41,  23,  49,  31,  44,  26, },
00220 {  2,  57,  16,  71,   1,  56,  15,  70, },
00221 { 39,  21,  52,  34,  38,  19,  51,  33, },
00222 { 11,  66,   7,  62,  10,  65,   6,  60, },
00223 { 48,  30,  43,  25,  47,  29,  42,  24, },
00224 };
00225 
00226 #if 1
00227 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220)[8][8]={
00228 {117,  62, 158, 103, 113,  58, 155, 100, },
00229 { 34, 199,  21, 186,  31, 196,  17, 182, },
00230 {144,  89, 131,  76, 141,  86, 127,  72, },
00231 {  0, 165,  41, 206,  10, 175,  52, 217, },
00232 {110,  55, 151,  96, 120,  65, 162, 107, },
00233 { 28, 193,  14, 179,  38, 203,  24, 189, },
00234 {138,  83, 124,  69, 148,  93, 134,  79, },
00235 {  7, 172,  48, 213,   3, 168,  45, 210, },
00236 };
00237 #elif 1
00238 // tries to correct a gamma of 1.5
00239 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220)[8][8]={
00240 {  0, 143,  18, 200,   2, 156,  25, 215, },
00241 { 78,  28, 125,  64,  89,  36, 138,  74, },
00242 { 10, 180,   3, 161,  16, 195,   8, 175, },
00243 {109,  51,  93,  38, 121,  60, 105,  47, },
00244 {  1, 152,  23, 210,   0, 147,  20, 205, },
00245 { 85,  33, 134,  71,  81,  30, 130,  67, },
00246 { 14, 190,   6, 171,  12, 185,   5, 166, },
00247 {117,  57, 101,  44, 113,  54,  97,  41, },
00248 };
00249 #elif 1
00250 // tries to correct a gamma of 2.0
00251 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220)[8][8]={
00252 {  0, 124,   8, 193,   0, 140,  12, 213, },
00253 { 55,  14, 104,  42,  66,  19, 119,  52, },
00254 {  3, 168,   1, 145,   6, 187,   3, 162, },
00255 { 86,  31,  70,  21,  99,  39,  82,  28, },
00256 {  0, 134,  11, 206,   0, 129,   9, 200, },
00257 { 62,  17, 114,  48,  58,  16, 109,  45, },
00258 {  5, 181,   2, 157,   4, 175,   1, 151, },
00259 { 95,  36,  78,  26,  90,  34,  74,  24, },
00260 };
00261 #else
00262 // tries to correct a gamma of 2.5
00263 DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220)[8][8]={
00264 {  0, 107,   3, 187,   0, 125,   6, 212, },
00265 { 39,   7,  86,  28,  49,  11, 102,  36, },
00266 {  1, 158,   0, 131,   3, 180,   1, 151, },
00267 { 68,  19,  52,  12,  81,  25,  64,  17, },
00268 {  0, 119,   5, 203,   0, 113,   4, 195, },
00269 { 45,   9,  96,  33,  42,   8,  91,  30, },
00270 {  2, 172,   1, 144,   2, 165,   0, 137, },
00271 { 77,  23,  60,  15,  72,  21,  56,  14, },
00272 };
00273 #endif
00274 
00275 static av_always_inline void yuv2yuvX16inC_template(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
00276                                                     const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
00277                                                     const int16_t **alpSrc, uint16_t *dest, uint16_t *uDest, uint16_t *vDest, uint16_t *aDest,
00278                                                     int dstW, int chrDstW, int big_endian)
00279 {
00280     //FIXME Optimize (just quickly written not optimized..)
00281     int i;
00282 
00283     for (i = 0; i < dstW; i++) {
00284         int val = 1 << 10;
00285         int j;
00286 
00287         for (j = 0; j < lumFilterSize; j++)
00288             val += lumSrc[j][i] * lumFilter[j];
00289 
00290         if (big_endian) {
00291             AV_WB16(&dest[i], av_clip_uint16(val >> 11));
00292         } else {
00293             AV_WL16(&dest[i], av_clip_uint16(val >> 11));
00294         }
00295     }
00296 
00297     if (uDest) {
00298         for (i = 0; i < chrDstW; i++) {
00299             int u = 1 << 10;
00300             int v = 1 << 10;
00301             int j;
00302 
00303             for (j = 0; j < chrFilterSize; j++) {
00304                 u += chrSrc[j][i       ] * chrFilter[j];
00305                 v += chrSrc[j][i + VOFW] * chrFilter[j];
00306             }
00307 
00308             if (big_endian) {
00309                 AV_WB16(&uDest[i], av_clip_uint16(u >> 11));
00310                 AV_WB16(&vDest[i], av_clip_uint16(v >> 11));
00311             } else {
00312                 AV_WL16(&uDest[i], av_clip_uint16(u >> 11));
00313                 AV_WL16(&vDest[i], av_clip_uint16(v >> 11));
00314             }
00315         }
00316     }
00317 
00318     if (CONFIG_SWSCALE_ALPHA && aDest) {
00319         for (i = 0; i < dstW; i++) {
00320             int val = 1 << 10;
00321             int j;
00322 
00323             for (j = 0; j < lumFilterSize; j++)
00324                 val += alpSrc[j][i] * lumFilter[j];
00325 
00326             if (big_endian) {
00327                 AV_WB16(&aDest[i], av_clip_uint16(val >> 11));
00328             } else {
00329                 AV_WL16(&aDest[i], av_clip_uint16(val >> 11));
00330             }
00331         }
00332     }
00333 }
00334 
00335 static inline void yuv2yuvX16inC(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
00336                                  const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
00337                                  const int16_t **alpSrc, uint16_t *dest, uint16_t *uDest, uint16_t *vDest, uint16_t *aDest, int dstW, int chrDstW,
00338                                  enum PixelFormat dstFormat)
00339 {
00340     if (isBE(dstFormat)) {
00341         yuv2yuvX16inC_template(lumFilter, lumSrc, lumFilterSize,
00342                                chrFilter, chrSrc, chrFilterSize,
00343                                alpSrc,
00344                                dest, uDest, vDest, aDest,
00345                                dstW, chrDstW, 1);
00346     } else {
00347         yuv2yuvX16inC_template(lumFilter, lumSrc, lumFilterSize,
00348                                chrFilter, chrSrc, chrFilterSize,
00349                                alpSrc,
00350                                dest, uDest, vDest, aDest,
00351                                dstW, chrDstW, 0);
00352     }
00353 }
00354 
00355 static inline void yuv2yuvXinC(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
00356                                const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
00357                                const int16_t **alpSrc, uint8_t *dest, uint8_t *uDest, uint8_t *vDest, uint8_t *aDest, int dstW, int chrDstW)
00358 {
00359     //FIXME Optimize (just quickly written not optimized..)
00360     int i;
00361     for (i=0; i<dstW; i++) {
00362         int val=1<<18;
00363         int j;
00364         for (j=0; j<lumFilterSize; j++)
00365             val += lumSrc[j][i] * lumFilter[j];
00366 
00367         dest[i]= av_clip_uint8(val>>19);
00368     }
00369 
00370     if (uDest)
00371         for (i=0; i<chrDstW; i++) {
00372             int u=1<<18;
00373             int v=1<<18;
00374             int j;
00375             for (j=0; j<chrFilterSize; j++) {
00376                 u += chrSrc[j][i] * chrFilter[j];
00377                 v += chrSrc[j][i + VOFW] * chrFilter[j];
00378             }
00379 
00380             uDest[i]= av_clip_uint8(u>>19);
00381             vDest[i]= av_clip_uint8(v>>19);
00382         }
00383 
00384     if (CONFIG_SWSCALE_ALPHA && aDest)
00385         for (i=0; i<dstW; i++) {
00386             int val=1<<18;
00387             int j;
00388             for (j=0; j<lumFilterSize; j++)
00389                 val += alpSrc[j][i] * lumFilter[j];
00390 
00391             aDest[i]= av_clip_uint8(val>>19);
00392         }
00393 
00394 }
00395 
00396 static inline void yuv2nv12XinC(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
00397                                 const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
00398                                 uint8_t *dest, uint8_t *uDest, int dstW, int chrDstW, int dstFormat)
00399 {
00400     //FIXME Optimize (just quickly written not optimized..)
00401     int i;
00402     for (i=0; i<dstW; i++) {
00403         int val=1<<18;
00404         int j;
00405         for (j=0; j<lumFilterSize; j++)
00406             val += lumSrc[j][i] * lumFilter[j];
00407 
00408         dest[i]= av_clip_uint8(val>>19);
00409     }
00410 
00411     if (!uDest)
00412         return;
00413 
00414     if (dstFormat == PIX_FMT_NV12)
00415         for (i=0; i<chrDstW; i++) {
00416             int u=1<<18;
00417             int v=1<<18;
00418             int j;
00419             for (j=0; j<chrFilterSize; j++) {
00420                 u += chrSrc[j][i] * chrFilter[j];
00421                 v += chrSrc[j][i + VOFW] * chrFilter[j];
00422             }
00423 
00424             uDest[2*i]= av_clip_uint8(u>>19);
00425             uDest[2*i+1]= av_clip_uint8(v>>19);
00426         }
00427     else
00428         for (i=0; i<chrDstW; i++) {
00429             int u=1<<18;
00430             int v=1<<18;
00431             int j;
00432             for (j=0; j<chrFilterSize; j++) {
00433                 u += chrSrc[j][i] * chrFilter[j];
00434                 v += chrSrc[j][i + VOFW] * chrFilter[j];
00435             }
00436 
00437             uDest[2*i]= av_clip_uint8(v>>19);
00438             uDest[2*i+1]= av_clip_uint8(u>>19);
00439         }
00440 }
00441 
00442 #define YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha) \
00443     for (i=0; i<(dstW>>1); i++) {\
00444         int j;\
00445         int Y1 = 1<<18;\
00446         int Y2 = 1<<18;\
00447         int U  = 1<<18;\
00448         int V  = 1<<18;\
00449         int av_unused A1, A2;\
00450         type av_unused *r, *b, *g;\
00451         const int i2= 2*i;\
00452         \
00453         for (j=0; j<lumFilterSize; j++) {\
00454             Y1 += lumSrc[j][i2] * lumFilter[j];\
00455             Y2 += lumSrc[j][i2+1] * lumFilter[j];\
00456         }\
00457         for (j=0; j<chrFilterSize; j++) {\
00458             U += chrSrc[j][i] * chrFilter[j];\
00459             V += chrSrc[j][i+VOFW] * chrFilter[j];\
00460         }\
00461         Y1>>=19;\
00462         Y2>>=19;\
00463         U >>=19;\
00464         V >>=19;\
00465         if (alpha) {\
00466             A1 = 1<<18;\
00467             A2 = 1<<18;\
00468             for (j=0; j<lumFilterSize; j++) {\
00469                 A1 += alpSrc[j][i2  ] * lumFilter[j];\
00470                 A2 += alpSrc[j][i2+1] * lumFilter[j];\
00471             }\
00472             A1>>=19;\
00473             A2>>=19;\
00474         }
00475 
00476 #define YSCALE_YUV_2_PACKEDX_C(type,alpha) \
00477         YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha)\
00478         if ((Y1|Y2|U|V)&256) {\
00479             if (Y1>255)   Y1=255; \
00480             else if (Y1<0)Y1=0;   \
00481             if (Y2>255)   Y2=255; \
00482             else if (Y2<0)Y2=0;   \
00483             if (U>255)    U=255;  \
00484             else if (U<0) U=0;    \
00485             if (V>255)    V=255;  \
00486             else if (V<0) V=0;    \
00487         }\
00488         if (alpha && ((A1|A2)&256)) {\
00489             A1=av_clip_uint8(A1);\
00490             A2=av_clip_uint8(A2);\
00491         }
00492 
00493 #define YSCALE_YUV_2_PACKEDX_FULL_C(rnd,alpha) \
00494     for (i=0; i<dstW; i++) {\
00495         int j;\
00496         int Y = 0;\
00497         int U = -128<<19;\
00498         int V = -128<<19;\
00499         int av_unused A;\
00500         int R,G,B;\
00501         \
00502         for (j=0; j<lumFilterSize; j++) {\
00503             Y += lumSrc[j][i     ] * lumFilter[j];\
00504         }\
00505         for (j=0; j<chrFilterSize; j++) {\
00506             U += chrSrc[j][i     ] * chrFilter[j];\
00507             V += chrSrc[j][i+VOFW] * chrFilter[j];\
00508         }\
00509         Y >>=10;\
00510         U >>=10;\
00511         V >>=10;\
00512         if (alpha) {\
00513             A = rnd;\
00514             for (j=0; j<lumFilterSize; j++)\
00515                 A += alpSrc[j][i     ] * lumFilter[j];\
00516             A >>=19;\
00517             if (A&256)\
00518                 A = av_clip_uint8(A);\
00519         }
00520 
00521 #define YSCALE_YUV_2_RGBX_FULL_C(rnd,alpha) \
00522     YSCALE_YUV_2_PACKEDX_FULL_C(rnd>>3,alpha)\
00523         Y-= c->yuv2rgb_y_offset;\
00524         Y*= c->yuv2rgb_y_coeff;\
00525         Y+= rnd;\
00526         R= Y + V*c->yuv2rgb_v2r_coeff;\
00527         G= Y + V*c->yuv2rgb_v2g_coeff + U*c->yuv2rgb_u2g_coeff;\
00528         B= Y +                          U*c->yuv2rgb_u2b_coeff;\
00529         if ((R|G|B)&(0xC0000000)) {\
00530             if (R>=(256<<22))   R=(256<<22)-1; \
00531             else if (R<0)R=0;   \
00532             if (G>=(256<<22))   G=(256<<22)-1; \
00533             else if (G<0)G=0;   \
00534             if (B>=(256<<22))   B=(256<<22)-1; \
00535             else if (B<0)B=0;   \
00536         }
00537 
00538 #define YSCALE_YUV_2_GRAY16_C \
00539     for (i=0; i<(dstW>>1); i++) {\
00540         int j;\
00541         int Y1 = 1<<18;\
00542         int Y2 = 1<<18;\
00543         int U  = 1<<18;\
00544         int V  = 1<<18;\
00545         \
00546         const int i2= 2*i;\
00547         \
00548         for (j=0; j<lumFilterSize; j++) {\
00549             Y1 += lumSrc[j][i2] * lumFilter[j];\
00550             Y2 += lumSrc[j][i2+1] * lumFilter[j];\
00551         }\
00552         Y1>>=11;\
00553         Y2>>=11;\
00554         if ((Y1|Y2|U|V)&65536) {\
00555             if (Y1>65535)   Y1=65535; \
00556             else if (Y1<0)Y1=0;   \
00557             if (Y2>65535)   Y2=65535; \
00558             else if (Y2<0)Y2=0;   \
00559         }
00560 
00561 #define YSCALE_YUV_2_RGBX_C(type,alpha) \
00562     YSCALE_YUV_2_PACKEDX_C(type,alpha)  /* FIXME fix tables so that clipping is not needed and then use _NOCLIP*/\
00563     r = (type *)c->table_rV[V];   \
00564     g = (type *)(c->table_gU[U] + c->table_gV[V]); \
00565     b = (type *)c->table_bU[U];
00566 
00567 #define YSCALE_YUV_2_PACKED2_C(type,alpha)   \
00568     for (i=0; i<(dstW>>1); i++) { \
00569         const int i2= 2*i;       \
00570         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>19;           \
00571         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>19;           \
00572         int U= (uvbuf0[i     ]*uvalpha1+uvbuf1[i     ]*uvalpha)>>19;  \
00573         int V= (uvbuf0[i+VOFW]*uvalpha1+uvbuf1[i+VOFW]*uvalpha)>>19;  \
00574         type av_unused *r, *b, *g;                                    \
00575         int av_unused A1, A2;                                         \
00576         if (alpha) {\
00577             A1= (abuf0[i2  ]*yalpha1+abuf1[i2  ]*yalpha)>>19;         \
00578             A2= (abuf0[i2+1]*yalpha1+abuf1[i2+1]*yalpha)>>19;         \
00579         }
00580 
00581 #define YSCALE_YUV_2_GRAY16_2_C   \
00582     for (i=0; i<(dstW>>1); i++) { \
00583         const int i2= 2*i;       \
00584         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>11;           \
00585         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>11;
00586 
00587 #define YSCALE_YUV_2_RGB2_C(type,alpha) \
00588     YSCALE_YUV_2_PACKED2_C(type,alpha)\
00589     r = (type *)c->table_rV[V];\
00590     g = (type *)(c->table_gU[U] + c->table_gV[V]);\
00591     b = (type *)c->table_bU[U];
00592 
00593 #define YSCALE_YUV_2_PACKED1_C(type,alpha) \
00594     for (i=0; i<(dstW>>1); i++) {\
00595         const int i2= 2*i;\
00596         int Y1= buf0[i2  ]>>7;\
00597         int Y2= buf0[i2+1]>>7;\
00598         int U= (uvbuf1[i     ])>>7;\
00599         int V= (uvbuf1[i+VOFW])>>7;\
00600         type av_unused *r, *b, *g;\
00601         int av_unused A1, A2;\
00602         if (alpha) {\
00603             A1= abuf0[i2  ]>>7;\
00604             A2= abuf0[i2+1]>>7;\
00605         }
00606 
00607 #define YSCALE_YUV_2_GRAY16_1_C \
00608     for (i=0; i<(dstW>>1); i++) {\
00609         const int i2= 2*i;\
00610         int Y1= buf0[i2  ]<<1;\
00611         int Y2= buf0[i2+1]<<1;
00612 
00613 #define YSCALE_YUV_2_RGB1_C(type,alpha) \
00614     YSCALE_YUV_2_PACKED1_C(type,alpha)\
00615     r = (type *)c->table_rV[V];\
00616     g = (type *)(c->table_gU[U] + c->table_gV[V]);\
00617     b = (type *)c->table_bU[U];
00618 
00619 #define YSCALE_YUV_2_PACKED1B_C(type,alpha) \
00620     for (i=0; i<(dstW>>1); i++) {\
00621         const int i2= 2*i;\
00622         int Y1= buf0[i2  ]>>7;\
00623         int Y2= buf0[i2+1]>>7;\
00624         int U= (uvbuf0[i     ] + uvbuf1[i     ])>>8;\
00625         int V= (uvbuf0[i+VOFW] + uvbuf1[i+VOFW])>>8;\
00626         type av_unused *r, *b, *g;\
00627         int av_unused A1, A2;\
00628         if (alpha) {\
00629             A1= abuf0[i2  ]>>7;\
00630             A2= abuf0[i2+1]>>7;\
00631         }
00632 
00633 #define YSCALE_YUV_2_RGB1B_C(type,alpha) \
00634     YSCALE_YUV_2_PACKED1B_C(type,alpha)\
00635     r = (type *)c->table_rV[V];\
00636     g = (type *)(c->table_gU[U] + c->table_gV[V]);\
00637     b = (type *)c->table_bU[U];
00638 
00639 #define YSCALE_YUV_2_MONO2_C \
00640     const uint8_t * const d128=dither_8x8_220[y&7];\
00641     uint8_t *g= c->table_gU[128] + c->table_gV[128];\
00642     for (i=0; i<dstW-7; i+=8) {\
00643         int acc;\
00644         acc =       g[((buf0[i  ]*yalpha1+buf1[i  ]*yalpha)>>19) + d128[0]];\
00645         acc+= acc + g[((buf0[i+1]*yalpha1+buf1[i+1]*yalpha)>>19) + d128[1]];\
00646         acc+= acc + g[((buf0[i+2]*yalpha1+buf1[i+2]*yalpha)>>19) + d128[2]];\
00647         acc+= acc + g[((buf0[i+3]*yalpha1+buf1[i+3]*yalpha)>>19) + d128[3]];\
00648         acc+= acc + g[((buf0[i+4]*yalpha1+buf1[i+4]*yalpha)>>19) + d128[4]];\
00649         acc+= acc + g[((buf0[i+5]*yalpha1+buf1[i+5]*yalpha)>>19) + d128[5]];\
00650         acc+= acc + g[((buf0[i+6]*yalpha1+buf1[i+6]*yalpha)>>19) + d128[6]];\
00651         acc+= acc + g[((buf0[i+7]*yalpha1+buf1[i+7]*yalpha)>>19) + d128[7]];\
00652         ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\
00653         dest++;\
00654     }
00655 
00656 #define YSCALE_YUV_2_MONOX_C \
00657     const uint8_t * const d128=dither_8x8_220[y&7];\
00658     uint8_t *g= c->table_gU[128] + c->table_gV[128];\
00659     int acc=0;\
00660     for (i=0; i<dstW-1; i+=2) {\
00661         int j;\
00662         int Y1=1<<18;\
00663         int Y2=1<<18;\
00664 \
00665         for (j=0; j<lumFilterSize; j++) {\
00666             Y1 += lumSrc[j][i] * lumFilter[j];\
00667             Y2 += lumSrc[j][i+1] * lumFilter[j];\
00668         }\
00669         Y1>>=19;\
00670         Y2>>=19;\
00671         if ((Y1|Y2)&256) {\
00672             if (Y1>255)   Y1=255;\
00673             else if (Y1<0)Y1=0;\
00674             if (Y2>255)   Y2=255;\
00675             else if (Y2<0)Y2=0;\
00676         }\
00677         acc+= acc + g[Y1+d128[(i+0)&7]];\
00678         acc+= acc + g[Y2+d128[(i+1)&7]];\
00679         if ((i&7)==6) {\
00680             ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\
00681             dest++;\
00682         }\
00683     }
00684 
00685 #define YSCALE_YUV_2_ANYRGB_C(func, func2, func_g16, func_monoblack)\
00686     switch(c->dstFormat) {\
00687     case PIX_FMT_RGB48BE:\
00688     case PIX_FMT_RGB48LE:\
00689         func(uint8_t,0)\
00690             ((uint8_t*)dest)[ 0]= r[Y1];\
00691             ((uint8_t*)dest)[ 1]= r[Y1];\
00692             ((uint8_t*)dest)[ 2]= g[Y1];\
00693             ((uint8_t*)dest)[ 3]= g[Y1];\
00694             ((uint8_t*)dest)[ 4]= b[Y1];\
00695             ((uint8_t*)dest)[ 5]= b[Y1];\
00696             ((uint8_t*)dest)[ 6]= r[Y2];\
00697             ((uint8_t*)dest)[ 7]= r[Y2];\
00698             ((uint8_t*)dest)[ 8]= g[Y2];\
00699             ((uint8_t*)dest)[ 9]= g[Y2];\
00700             ((uint8_t*)dest)[10]= b[Y2];\
00701             ((uint8_t*)dest)[11]= b[Y2];\
00702             dest+=12;\
00703         }\
00704         break;\
00705     case PIX_FMT_RGBA:\
00706     case PIX_FMT_BGRA:\
00707         if (CONFIG_SMALL) {\
00708             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;\
00709             func(uint32_t,needAlpha)\
00710                 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (needAlpha ? (A1<<24) : 0);\
00711                 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (needAlpha ? (A2<<24) : 0);\
00712             }\
00713         } else {\
00714             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {\
00715                 func(uint32_t,1)\
00716                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (A1<<24);\
00717                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (A2<<24);\
00718                 }\
00719             } else {\
00720                 func(uint32_t,0)\
00721                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\
00722                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\
00723                 }\
00724             }\
00725         }\
00726         break;\
00727     case PIX_FMT_ARGB:\
00728     case PIX_FMT_ABGR:\
00729         if (CONFIG_SMALL) {\
00730             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;\
00731             func(uint32_t,needAlpha)\
00732                 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (needAlpha ? A1 : 0);\
00733                 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (needAlpha ? A2 : 0);\
00734             }\
00735         } else {\
00736             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {\
00737                 func(uint32_t,1)\
00738                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + A1;\
00739                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + A2;\
00740                 }\
00741             } else {\
00742                 func(uint32_t,0)\
00743                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\
00744                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\
00745                 }\
00746             }\
00747         }                \
00748         break;\
00749     case PIX_FMT_RGB24:\
00750         func(uint8_t,0)\
00751             ((uint8_t*)dest)[0]= r[Y1];\
00752             ((uint8_t*)dest)[1]= g[Y1];\
00753             ((uint8_t*)dest)[2]= b[Y1];\
00754             ((uint8_t*)dest)[3]= r[Y2];\
00755             ((uint8_t*)dest)[4]= g[Y2];\
00756             ((uint8_t*)dest)[5]= b[Y2];\
00757             dest+=6;\
00758         }\
00759         break;\
00760     case PIX_FMT_BGR24:\
00761         func(uint8_t,0)\
00762             ((uint8_t*)dest)[0]= b[Y1];\
00763             ((uint8_t*)dest)[1]= g[Y1];\
00764             ((uint8_t*)dest)[2]= r[Y1];\
00765             ((uint8_t*)dest)[3]= b[Y2];\
00766             ((uint8_t*)dest)[4]= g[Y2];\
00767             ((uint8_t*)dest)[5]= r[Y2];\
00768             dest+=6;\
00769         }\
00770         break;\
00771     case PIX_FMT_RGB565BE:\
00772     case PIX_FMT_RGB565LE:\
00773     case PIX_FMT_BGR565BE:\
00774     case PIX_FMT_BGR565LE:\
00775         {\
00776             const int dr1= dither_2x2_8[y&1    ][0];\
00777             const int dg1= dither_2x2_4[y&1    ][0];\
00778             const int db1= dither_2x2_8[(y&1)^1][0];\
00779             const int dr2= dither_2x2_8[y&1    ][1];\
00780             const int dg2= dither_2x2_4[y&1    ][1];\
00781             const int db2= dither_2x2_8[(y&1)^1][1];\
00782             func(uint16_t,0)\
00783                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
00784                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
00785             }\
00786         }\
00787         break;\
00788     case PIX_FMT_RGB555BE:\
00789     case PIX_FMT_RGB555LE:\
00790     case PIX_FMT_BGR555BE:\
00791     case PIX_FMT_BGR555LE:\
00792         {\
00793             const int dr1= dither_2x2_8[y&1    ][0];\
00794             const int dg1= dither_2x2_8[y&1    ][1];\
00795             const int db1= dither_2x2_8[(y&1)^1][0];\
00796             const int dr2= dither_2x2_8[y&1    ][1];\
00797             const int dg2= dither_2x2_8[y&1    ][0];\
00798             const int db2= dither_2x2_8[(y&1)^1][1];\
00799             func(uint16_t,0)\
00800                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
00801                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
00802             }\
00803         }\
00804         break;\
00805     case PIX_FMT_RGB444BE:\
00806     case PIX_FMT_RGB444LE:\
00807     case PIX_FMT_BGR444BE:\
00808     case PIX_FMT_BGR444LE:\
00809         {\
00810             const int dr1= dither_4x4_16[y&3    ][0];\
00811             const int dg1= dither_4x4_16[y&3    ][1];\
00812             const int db1= dither_4x4_16[(y&3)^3][0];\
00813             const int dr2= dither_4x4_16[y&3    ][1];\
00814             const int dg2= dither_4x4_16[y&3    ][0];\
00815             const int db2= dither_4x4_16[(y&3)^3][1];\
00816             func(uint16_t,0)\
00817                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
00818                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
00819             }\
00820         }\
00821         break;\
00822     case PIX_FMT_RGB8:\
00823     case PIX_FMT_BGR8:\
00824         {\
00825             const uint8_t * const d64= dither_8x8_73[y&7];\
00826             const uint8_t * const d32= dither_8x8_32[y&7];\
00827             func(uint8_t,0)\
00828                 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];\
00829                 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];\
00830             }\
00831         }\
00832         break;\
00833     case PIX_FMT_RGB4:\
00834     case PIX_FMT_BGR4:\
00835         {\
00836             const uint8_t * const d64= dither_8x8_73 [y&7];\
00837             const uint8_t * const d128=dither_8x8_220[y&7];\
00838             func(uint8_t,0)\
00839                 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]\
00840                                  + ((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);\
00841             }\
00842         }\
00843         break;\
00844     case PIX_FMT_RGB4_BYTE:\
00845     case PIX_FMT_BGR4_BYTE:\
00846         {\
00847             const uint8_t * const d64= dither_8x8_73 [y&7];\
00848             const uint8_t * const d128=dither_8x8_220[y&7];\
00849             func(uint8_t,0)\
00850                 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];\
00851                 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];\
00852             }\
00853         }\
00854         break;\
00855     case PIX_FMT_MONOBLACK:\
00856     case PIX_FMT_MONOWHITE:\
00857         {\
00858             func_monoblack\
00859         }\
00860         break;\
00861     case PIX_FMT_YUYV422:\
00862         func2\
00863             ((uint8_t*)dest)[2*i2+0]= Y1;\
00864             ((uint8_t*)dest)[2*i2+1]= U;\
00865             ((uint8_t*)dest)[2*i2+2]= Y2;\
00866             ((uint8_t*)dest)[2*i2+3]= V;\
00867         }                \
00868         break;\
00869     case PIX_FMT_UYVY422:\
00870         func2\
00871             ((uint8_t*)dest)[2*i2+0]= U;\
00872             ((uint8_t*)dest)[2*i2+1]= Y1;\
00873             ((uint8_t*)dest)[2*i2+2]= V;\
00874             ((uint8_t*)dest)[2*i2+3]= Y2;\
00875         }                \
00876         break;\
00877     case PIX_FMT_GRAY16BE:\
00878         func_g16\
00879             ((uint8_t*)dest)[2*i2+0]= Y1>>8;\
00880             ((uint8_t*)dest)[2*i2+1]= Y1;\
00881             ((uint8_t*)dest)[2*i2+2]= Y2>>8;\
00882             ((uint8_t*)dest)[2*i2+3]= Y2;\
00883         }                \
00884         break;\
00885     case PIX_FMT_GRAY16LE:\
00886         func_g16\
00887             ((uint8_t*)dest)[2*i2+0]= Y1;\
00888             ((uint8_t*)dest)[2*i2+1]= Y1>>8;\
00889             ((uint8_t*)dest)[2*i2+2]= Y2;\
00890             ((uint8_t*)dest)[2*i2+3]= Y2>>8;\
00891         }                \
00892         break;\
00893     }
00894 
00895 static inline void yuv2packedXinC(SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
00896                                   const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
00897                                   const int16_t **alpSrc, uint8_t *dest, int dstW, int y)
00898 {
00899     int i;
00900     YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGBX_C, YSCALE_YUV_2_PACKEDX_C(void,0), YSCALE_YUV_2_GRAY16_C, YSCALE_YUV_2_MONOX_C)
00901 }
00902 
00903 static inline void yuv2rgbXinC_full(SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
00904                                     const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
00905                                     const int16_t **alpSrc, uint8_t *dest, int dstW, int y)
00906 {
00907     int i;
00908     int step= c->dstFormatBpp/8;
00909     int aidx= 3;
00910 
00911     switch(c->dstFormat) {
00912     case PIX_FMT_ARGB:
00913         dest++;
00914         aidx= 0;
00915     case PIX_FMT_RGB24:
00916         aidx--;
00917     case PIX_FMT_RGBA:
00918         if (CONFIG_SMALL) {
00919             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;
00920             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)
00921                 dest[aidx]= needAlpha ? A : 255;
00922                 dest[0]= R>>22;
00923                 dest[1]= G>>22;
00924                 dest[2]= B>>22;
00925                 dest+= step;
00926             }
00927         } else {
00928             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
00929                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)
00930                     dest[aidx]= A;
00931                     dest[0]= R>>22;
00932                     dest[1]= G>>22;
00933                     dest[2]= B>>22;
00934                     dest+= step;
00935                 }
00936             } else {
00937                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)
00938                     dest[aidx]= 255;
00939                     dest[0]= R>>22;
00940                     dest[1]= G>>22;
00941                     dest[2]= B>>22;
00942                     dest+= step;
00943                 }
00944             }
00945         }
00946         break;
00947     case PIX_FMT_ABGR:
00948         dest++;
00949         aidx= 0;
00950     case PIX_FMT_BGR24:
00951         aidx--;
00952     case PIX_FMT_BGRA:
00953         if (CONFIG_SMALL) {
00954             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;
00955             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)
00956                 dest[aidx]= needAlpha ? A : 255;
00957                 dest[0]= B>>22;
00958                 dest[1]= G>>22;
00959                 dest[2]= R>>22;
00960                 dest+= step;
00961             }
00962         } else {
00963             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
00964                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)
00965                     dest[aidx]= A;
00966                     dest[0]= B>>22;
00967                     dest[1]= G>>22;
00968                     dest[2]= R>>22;
00969                     dest+= step;
00970                 }
00971             } else {
00972                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)
00973                     dest[aidx]= 255;
00974                     dest[0]= B>>22;
00975                     dest[1]= G>>22;
00976                     dest[2]= R>>22;
00977                     dest+= step;
00978                 }
00979             }
00980         }
00981         break;
00982     default:
00983         assert(0);
00984     }
00985 }
00986 
00987 static void fillPlane(uint8_t* plane, int stride, int width, int height, int y, uint8_t val)
00988 {
00989     int i;
00990     uint8_t *ptr = plane + stride*y;
00991     for (i=0; i<height; i++) {
00992         memset(ptr, val, width);
00993         ptr += stride;
00994     }
00995 }
00996 
00997 static inline void rgb48ToY(uint8_t *dst, const uint8_t *src, int width,
00998                             uint32_t *unused)
00999 {
01000     int i;
01001     for (i = 0; i < width; i++) {
01002         int r = src[i*6+0];
01003         int g = src[i*6+2];
01004         int b = src[i*6+4];
01005 
01006         dst[i] = (RY*r + GY*g + BY*b + (33<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
01007     }
01008 }
01009 
01010 static inline void rgb48ToUV(uint8_t *dstU, uint8_t *dstV,
01011                              const uint8_t *src1, const uint8_t *src2,
01012                              int width, uint32_t *unused)
01013 {
01014     int i;
01015     assert(src1==src2);
01016     for (i = 0; i < width; i++) {
01017         int r = src1[6*i + 0];
01018         int g = src1[6*i + 2];
01019         int b = src1[6*i + 4];
01020 
01021         dstU[i] = (RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
01022         dstV[i] = (RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
01023     }
01024 }
01025 
01026 static inline void rgb48ToUV_half(uint8_t *dstU, uint8_t *dstV,
01027                                   const uint8_t *src1, const uint8_t *src2,
01028                                   int width, uint32_t *unused)
01029 {
01030     int i;
01031     assert(src1==src2);
01032     for (i = 0; i < width; i++) {
01033         int r= src1[12*i + 0] + src1[12*i + 6];
01034         int g= src1[12*i + 2] + src1[12*i + 8];
01035         int b= src1[12*i + 4] + src1[12*i + 10];
01036 
01037         dstU[i]= (RU*r + GU*g + BU*b + (257<<RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT+1);
01038         dstV[i]= (RV*r + GV*g + BV*b + (257<<RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT+1);
01039     }
01040 }
01041 
01042 #define BGR2Y(type, name, shr, shg, shb, maskr, maskg, maskb, RY, GY, BY, S)\
01043 static inline void name(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)\
01044 {\
01045     int i;\
01046     for (i=0; i<width; i++) {\
01047         int b= (((const type*)src)[i]>>shb)&maskb;\
01048         int g= (((const type*)src)[i]>>shg)&maskg;\
01049         int r= (((const type*)src)[i]>>shr)&maskr;\
01050 \
01051         dst[i]= (((RY)*r + (GY)*g + (BY)*b + (33<<((S)-1)))>>(S));\
01052     }\
01053 }
01054 
01055 BGR2Y(uint32_t, bgr32ToY,16, 0, 0, 0x00FF, 0xFF00, 0x00FF, RY<< 8, GY   , BY<< 8, RGB2YUV_SHIFT+8)
01056 BGR2Y(uint32_t, rgb32ToY, 0, 0,16, 0x00FF, 0xFF00, 0x00FF, RY<< 8, GY   , BY<< 8, RGB2YUV_SHIFT+8)
01057 BGR2Y(uint16_t, bgr16ToY, 0, 0, 0, 0x001F, 0x07E0, 0xF800, RY<<11, GY<<5, BY    , RGB2YUV_SHIFT+8)
01058 BGR2Y(uint16_t, bgr15ToY, 0, 0, 0, 0x001F, 0x03E0, 0x7C00, RY<<10, GY<<5, BY    , RGB2YUV_SHIFT+7)
01059 BGR2Y(uint16_t, rgb16ToY, 0, 0, 0, 0xF800, 0x07E0, 0x001F, RY    , GY<<5, BY<<11, RGB2YUV_SHIFT+8)
01060 BGR2Y(uint16_t, rgb15ToY, 0, 0, 0, 0x7C00, 0x03E0, 0x001F, RY    , GY<<5, BY<<10, RGB2YUV_SHIFT+7)
01061 
01062 static inline void abgrToA(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)
01063 {
01064     int i;
01065     for (i=0; i<width; i++) {
01066         dst[i]= src[4*i];
01067     }
01068 }
01069 
01070 #define BGR2UV(type, name, shr, shg, shb, maska, maskr, maskg, maskb, RU, GU, BU, RV, GV, BV, S)\
01071 static inline void name(uint8_t *dstU, uint8_t *dstV, const uint8_t *src, const uint8_t *dummy, long width, uint32_t *unused)\
01072 {\
01073     int i;\
01074     for (i=0; i<width; i++) {\
01075         int b= (((const type*)src)[i]&maskb)>>shb;\
01076         int g= (((const type*)src)[i]&maskg)>>shg;\
01077         int r= (((const type*)src)[i]&maskr)>>shr;\
01078 \
01079         dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<((S)-1)))>>(S);\
01080         dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<((S)-1)))>>(S);\
01081     }\
01082 }\
01083 static inline void name ## _half(uint8_t *dstU, uint8_t *dstV, const uint8_t *src, const uint8_t *dummy, long width, uint32_t *unused)\
01084 {\
01085     int i;\
01086     for (i=0; i<width; i++) {\
01087         int pix0= ((const type*)src)[2*i+0];\
01088         int pix1= ((const type*)src)[2*i+1];\
01089         int g= (pix0&~(maskr|maskb))+(pix1&~(maskr|maskb));\
01090         int b= ((pix0+pix1-g)&(maskb|(2*maskb)))>>shb;\
01091         int r= ((pix0+pix1-g)&(maskr|(2*maskr)))>>shr;\
01092         g&= maskg|(2*maskg);\
01093 \
01094         g>>=shg;\
01095 \
01096         dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<(S)))>>((S)+1);\
01097         dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<(S)))>>((S)+1);\
01098     }\
01099 }
01100 
01101 BGR2UV(uint32_t, bgr32ToUV,16, 0, 0, 0xFF000000, 0xFF0000, 0xFF00,   0x00FF, RU<< 8, GU   , BU<< 8, RV<< 8, GV   , BV<< 8, RGB2YUV_SHIFT+8)
01102 BGR2UV(uint32_t, rgb32ToUV, 0, 0,16, 0xFF000000,   0x00FF, 0xFF00, 0xFF0000, RU<< 8, GU   , BU<< 8, RV<< 8, GV   , BV<< 8, RGB2YUV_SHIFT+8)
01103 BGR2UV(uint16_t, bgr16ToUV, 0, 0, 0,          0,   0x001F, 0x07E0,   0xF800, RU<<11, GU<<5, BU    , RV<<11, GV<<5, BV    , RGB2YUV_SHIFT+8)
01104 BGR2UV(uint16_t, bgr15ToUV, 0, 0, 0,          0,   0x001F, 0x03E0,   0x7C00, RU<<10, GU<<5, BU    , RV<<10, GV<<5, BV    , RGB2YUV_SHIFT+7)
01105 BGR2UV(uint16_t, rgb16ToUV, 0, 0, 0,          0,   0xF800, 0x07E0,   0x001F, RU    , GU<<5, BU<<11, RV    , GV<<5, BV<<11, RGB2YUV_SHIFT+8)
01106 BGR2UV(uint16_t, rgb15ToUV, 0, 0, 0,          0,   0x7C00, 0x03E0,   0x001F, RU    , GU<<5, BU<<10, RV    , GV<<5, BV<<10, RGB2YUV_SHIFT+7)
01107 
01108 static inline void palToY(uint8_t *dst, const uint8_t *src, long width, uint32_t *pal)
01109 {
01110     int i;
01111     for (i=0; i<width; i++) {
01112         int d= src[i];
01113 
01114         dst[i]= pal[d] & 0xFF;
01115     }
01116 }
01117 
01118 static inline void palToUV(uint8_t *dstU, uint8_t *dstV,
01119                            const uint8_t *src1, const uint8_t *src2,
01120                            long width, uint32_t *pal)
01121 {
01122     int i;
01123     assert(src1 == src2);
01124     for (i=0; i<width; i++) {
01125         int p= pal[src1[i]];
01126 
01127         dstU[i]= p>>8;
01128         dstV[i]= p>>16;
01129     }
01130 }
01131 
01132 static inline void monowhite2Y(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)
01133 {
01134     int i, j;
01135     for (i=0; i<width/8; i++) {
01136         int d= ~src[i];
01137         for(j=0; j<8; j++)
01138             dst[8*i+j]= ((d>>(7-j))&1)*255;
01139     }
01140 }
01141 
01142 static inline void monoblack2Y(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)
01143 {
01144     int i, j;
01145     for (i=0; i<width/8; i++) {
01146         int d= src[i];
01147         for(j=0; j<8; j++)
01148             dst[8*i+j]= ((d>>(7-j))&1)*255;
01149     }
01150 }
01151 
01152 //Note: we have C, MMX, MMX2, 3DNOW versions, there is no 3DNOW+MMX2 one
01153 //Plain C versions
01154 #if (!HAVE_MMX && !HAVE_ALTIVEC) || CONFIG_RUNTIME_CPUDETECT
01155 #define COMPILE_C
01156 #endif
01157 
01158 #if ARCH_PPC
01159 #if HAVE_ALTIVEC
01160 #define COMPILE_ALTIVEC
01161 #endif
01162 #endif //ARCH_PPC
01163 
01164 #if ARCH_X86
01165 
01166 #if (HAVE_MMX && !HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT
01167 #define COMPILE_MMX
01168 #endif
01169 
01170 #if HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT
01171 #define COMPILE_MMX2
01172 #endif
01173 
01174 #if (HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT
01175 #define COMPILE_3DNOW
01176 #endif
01177 #endif //ARCH_X86
01178 
01179 #define COMPILE_TEMPLATE_MMX 0
01180 #define COMPILE_TEMPLATE_MMX2 0
01181 #define COMPILE_TEMPLATE_AMD3DNOW 0
01182 #define COMPILE_TEMPLATE_ALTIVEC 0
01183 
01184 #ifdef COMPILE_C
01185 #define RENAME(a) a ## _C
01186 #include "swscale_template.c"
01187 #endif
01188 
01189 #ifdef COMPILE_ALTIVEC
01190 #undef RENAME
01191 #undef COMPILE_TEMPLATE_ALTIVEC
01192 #define COMPILE_TEMPLATE_ALTIVEC 1
01193 #define RENAME(a) a ## _altivec
01194 #include "swscale_template.c"
01195 #endif
01196 
01197 #if ARCH_X86
01198 
01199 //MMX versions
01200 #ifdef COMPILE_MMX
01201 #undef RENAME
01202 #undef COMPILE_TEMPLATE_MMX
01203 #undef COMPILE_TEMPLATE_MMX2
01204 #undef COMPILE_TEMPLATE_AMD3DNOW
01205 #define COMPILE_TEMPLATE_MMX 1
01206 #define COMPILE_TEMPLATE_MMX2 0
01207 #define COMPILE_TEMPLATE_AMD3DNOW 0
01208 #define RENAME(a) a ## _MMX
01209 #include "swscale_template.c"
01210 #endif
01211 
01212 //MMX2 versions
01213 #ifdef COMPILE_MMX2
01214 #undef RENAME
01215 #undef COMPILE_TEMPLATE_MMX
01216 #undef COMPILE_TEMPLATE_MMX2
01217 #undef COMPILE_TEMPLATE_AMD3DNOW
01218 #define COMPILE_TEMPLATE_MMX 1
01219 #define COMPILE_TEMPLATE_MMX2 1
01220 #define COMPILE_TEMPLATE_AMD3DNOW 0
01221 #define RENAME(a) a ## _MMX2
01222 #include "swscale_template.c"
01223 #endif
01224 
01225 //3DNOW versions
01226 #ifdef COMPILE_3DNOW
01227 #undef RENAME
01228 #undef COMPILE_TEMPLATE_MMX
01229 #undef COMPILE_TEMPLATE_MMX2
01230 #undef COMPILE_TEMPLATE_AMD3DNOW
01231 #define COMPILE_TEMPLATE_MMX 1
01232 #define COMPILE_TEMPLATE_MMX2 0
01233 #define COMPILE_TEMPLATE_AMD3DNOW 1
01234 #define RENAME(a) a ## _3DNow
01235 #include "swscale_template.c"
01236 #endif
01237 
01238 #endif //ARCH_X86
01239 
01240 SwsFunc ff_getSwsFunc(SwsContext *c)
01241 {
01242 #if CONFIG_RUNTIME_CPUDETECT
01243     int flags = c->flags;
01244 
01245 #if ARCH_X86
01246     // ordered per speed fastest first
01247     if (flags & SWS_CPU_CAPS_MMX2) {
01248         sws_init_swScale_MMX2(c);
01249         return swScale_MMX2;
01250     } else if (flags & SWS_CPU_CAPS_3DNOW) {
01251         sws_init_swScale_3DNow(c);
01252         return swScale_3DNow;
01253     } else if (flags & SWS_CPU_CAPS_MMX) {
01254         sws_init_swScale_MMX(c);
01255         return swScale_MMX;
01256     } else {
01257         sws_init_swScale_C(c);
01258         return swScale_C;
01259     }
01260 
01261 #else
01262 #ifdef COMPILE_ALTIVEC
01263     if (flags & SWS_CPU_CAPS_ALTIVEC) {
01264         sws_init_swScale_altivec(c);
01265         return swScale_altivec;
01266     } else {
01267         sws_init_swScale_C(c);
01268         return swScale_C;
01269     }
01270 #endif
01271     sws_init_swScale_C(c);
01272     return swScale_C;
01273 #endif /* ARCH_X86 */
01274 #else //CONFIG_RUNTIME_CPUDETECT
01275 #if   COMPILE_TEMPLATE_MMX2
01276     sws_init_swScale_MMX2(c);
01277     return swScale_MMX2;
01278 #elif COMPILE_TEMPLATE_AMD3DNOW
01279     sws_init_swScale_3DNow(c);
01280     return swScale_3DNow;
01281 #elif COMPILE_TEMPLATE_MMX
01282     sws_init_swScale_MMX(c);
01283     return swScale_MMX;
01284 #elif COMPILE_TEMPLATE_ALTIVEC
01285     sws_init_swScale_altivec(c);
01286     return swScale_altivec;
01287 #else
01288     sws_init_swScale_C(c);
01289     return swScale_C;
01290 #endif
01291 #endif //!CONFIG_RUNTIME_CPUDETECT
01292 }
01293 
01294 static int planarToNv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01295                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
01296 {
01297     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
01298     /* Copy Y plane */
01299     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)
01300         memcpy(dst, src[0], srcSliceH*dstStride[0]);
01301     else {
01302         int i;
01303         const uint8_t *srcPtr= src[0];
01304         uint8_t *dstPtr= dst;
01305         for (i=0; i<srcSliceH; i++) {
01306             memcpy(dstPtr, srcPtr, c->srcW);
01307             srcPtr+= srcStride[0];
01308             dstPtr+= dstStride[0];
01309         }
01310     }
01311     dst = dstParam[1] + dstStride[1]*srcSliceY/2;
01312     if (c->dstFormat == PIX_FMT_NV12)
01313         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);
01314     else
01315         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);
01316 
01317     return srcSliceH;
01318 }
01319 
01320 static int planarToYuy2Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01321                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
01322 {
01323     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
01324 
01325     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);
01326 
01327     return srcSliceH;
01328 }
01329 
01330 static int planarToUyvyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01331                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
01332 {
01333     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
01334 
01335     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);
01336 
01337     return srcSliceH;
01338 }
01339 
01340 static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01341                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])
01342 {
01343     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
01344 
01345     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);
01346 
01347     return srcSliceH;
01348 }
01349 
01350 static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01351                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])
01352 {
01353     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
01354 
01355     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);
01356 
01357     return srcSliceH;
01358 }
01359 
01360 static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01361                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
01362 {
01363     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
01364     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;
01365     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;
01366 
01367     yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
01368 
01369     if (dstParam[3])
01370         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
01371 
01372     return srcSliceH;
01373 }
01374 
01375 static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01376                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
01377 {
01378     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
01379     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;
01380     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;
01381 
01382     yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
01383 
01384     return srcSliceH;
01385 }
01386 
01387 static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01388                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
01389 {
01390     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
01391     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;
01392     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;
01393 
01394     uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
01395 
01396     if (dstParam[3])
01397         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
01398 
01399     return srcSliceH;
01400 }
01401 
01402 static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01403                                int srcSliceH, uint8_t* dstParam[], int dstStride[])
01404 {
01405     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;
01406     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;
01407     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;
01408 
01409     uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
01410 
01411     return srcSliceH;
01412 }
01413 
01414 static int palToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01415                            int srcSliceH, uint8_t* dst[], int dstStride[])
01416 {
01417     const enum PixelFormat srcFormat= c->srcFormat;
01418     const enum PixelFormat dstFormat= c->dstFormat;
01419     void (*conv)(const uint8_t *src, uint8_t *dst, long num_pixels,
01420                  const uint8_t *palette)=NULL;
01421     int i;
01422     uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
01423     const uint8_t *srcPtr= src[0];
01424 
01425     if (usePal(srcFormat)) {
01426         switch (dstFormat) {
01427         case PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;
01428         case PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;
01429         case PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
01430         case PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
01431         case PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;
01432         case PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;
01433         }
01434     }
01435 
01436     if (!conv)
01437         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
01438                sws_format_name(srcFormat), sws_format_name(dstFormat));
01439     else {
01440         for (i=0; i<srcSliceH; i++) {
01441             conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
01442             srcPtr+= srcStride[0];
01443             dstPtr+= dstStride[0];
01444         }
01445     }
01446 
01447     return srcSliceH;
01448 }
01449 
01450 #define isRGBA32(x) (            \
01451            (x) == PIX_FMT_ARGB   \
01452         || (x) == PIX_FMT_RGBA   \
01453         || (x) == PIX_FMT_BGRA   \
01454         || (x) == PIX_FMT_ABGR   \
01455         )
01456 
01457 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
01458 static int rgbToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01459                            int srcSliceH, uint8_t* dst[], int dstStride[])
01460 {
01461     const enum PixelFormat srcFormat= c->srcFormat;
01462     const enum PixelFormat dstFormat= c->dstFormat;
01463     const int srcBpp= (c->srcFormatBpp + 7) >> 3;
01464     const int dstBpp= (c->dstFormatBpp + 7) >> 3;
01465     const int srcId= c->srcFormatBpp >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */
01466     const int dstId= c->dstFormatBpp >> 2;
01467     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;
01468 
01469 #define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == PIX_FMT_##dst)
01470 
01471     if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
01472         if (     CONV_IS(ABGR, RGBA)
01473               || CONV_IS(ARGB, BGRA)
01474               || CONV_IS(BGRA, ARGB)
01475               || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
01476         else if (CONV_IS(ABGR, ARGB)
01477               || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
01478         else if (CONV_IS(ABGR, BGRA)
01479               || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
01480         else if (CONV_IS(BGRA, RGBA)
01481               || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
01482         else if (CONV_IS(BGRA, ABGR)
01483               || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
01484     } else
01485     /* BGR -> BGR */
01486     if (  (isBGRinInt(srcFormat) && isBGRinInt(dstFormat))
01487        || (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
01488         switch(srcId | (dstId<<4)) {
01489         case 0x34: conv= rgb16to15; break;
01490         case 0x36: conv= rgb24to15; break;
01491         case 0x38: conv= rgb32to15; break;
01492         case 0x43: conv= rgb15to16; break;
01493         case 0x46: conv= rgb24to16; break;
01494         case 0x48: conv= rgb32to16; break;
01495         case 0x63: conv= rgb15to24; break;
01496         case 0x64: conv= rgb16to24; break;
01497         case 0x68: conv= rgb32to24; break;
01498         case 0x83: conv= rgb15to32; break;
01499         case 0x84: conv= rgb16to32; break;
01500         case 0x86: conv= rgb24to32; break;
01501         }
01502     } else if (  (isBGRinInt(srcFormat) && isRGBinInt(dstFormat))
01503              || (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
01504         switch(srcId | (dstId<<4)) {
01505         case 0x33: conv= rgb15tobgr15; break;
01506         case 0x34: conv= rgb16tobgr15; break;
01507         case 0x36: conv= rgb24tobgr15; break;
01508         case 0x38: conv= rgb32tobgr15; break;
01509         case 0x43: conv= rgb15tobgr16; break;
01510         case 0x44: conv= rgb16tobgr16; break;
01511         case 0x46: conv= rgb24tobgr16; break;
01512         case 0x48: conv= rgb32tobgr16; break;
01513         case 0x63: conv= rgb15tobgr24; break;
01514         case 0x64: conv= rgb16tobgr24; break;
01515         case 0x66: conv= rgb24tobgr24; break;
01516         case 0x68: conv= rgb32tobgr24; break;
01517         case 0x83: conv= rgb15tobgr32; break;
01518         case 0x84: conv= rgb16tobgr32; break;
01519         case 0x86: conv= rgb24tobgr32; break;
01520         }
01521     }
01522 
01523     if (!conv) {
01524         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
01525                sws_format_name(srcFormat), sws_format_name(dstFormat));
01526     } else {
01527         const uint8_t *srcPtr= src[0];
01528               uint8_t *dstPtr= dst[0];
01529         if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) && !isRGBA32(dstFormat))
01530             srcPtr += ALT32_CORR;
01531 
01532         if ((dstFormat == PIX_FMT_RGB32_1 || dstFormat == PIX_FMT_BGR32_1) && !isRGBA32(srcFormat))
01533             dstPtr += ALT32_CORR;
01534 
01535         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)
01536             conv(srcPtr, dstPtr + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);
01537         else {
01538             int i;
01539             dstPtr += dstStride[0]*srcSliceY;
01540 
01541             for (i=0; i<srcSliceH; i++) {
01542                 conv(srcPtr, dstPtr, c->srcW*srcBpp);
01543                 srcPtr+= srcStride[0];
01544                 dstPtr+= dstStride[0];
01545             }
01546         }
01547     }
01548     return srcSliceH;
01549 }
01550 
01551 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01552                               int srcSliceH, uint8_t* dst[], int dstStride[])
01553 {
01554     rgb24toyv12(
01555         src[0],
01556         dst[0]+ srcSliceY    *dstStride[0],
01557         dst[1]+(srcSliceY>>1)*dstStride[1],
01558         dst[2]+(srcSliceY>>1)*dstStride[2],
01559         c->srcW, srcSliceH,
01560         dstStride[0], dstStride[1], srcStride[0]);
01561     if (dst[3])
01562         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
01563     return srcSliceH;
01564 }
01565 
01566 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01567                              int srcSliceH, uint8_t* dst[], int dstStride[])
01568 {
01569     int i;
01570 
01571     /* copy Y */
01572     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)
01573         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);
01574     else {
01575         const uint8_t *srcPtr= src[0];
01576         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
01577 
01578         for (i=0; i<srcSliceH; i++) {
01579             memcpy(dstPtr, srcPtr, c->srcW);
01580             srcPtr+= srcStride[0];
01581             dstPtr+= dstStride[0];
01582         }
01583     }
01584 
01585     if (c->dstFormat==PIX_FMT_YUV420P || c->dstFormat==PIX_FMT_YUVA420P) {
01586         planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,
01587                  srcSliceH >> 2, srcStride[1], dstStride[1]);
01588         planar2x(src[2], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,
01589                  srcSliceH >> 2, srcStride[2], dstStride[2]);
01590     } else {
01591         planar2x(src[1], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,
01592                  srcSliceH >> 2, srcStride[1], dstStride[2]);
01593         planar2x(src[2], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,
01594                  srcSliceH >> 2, srcStride[2], dstStride[1]);
01595     }
01596     if (dst[3])
01597         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
01598     return srcSliceH;
01599 }
01600 
01601 /* unscaled copy like stuff (assumes nearly identical formats) */
01602 static int packedCopyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01603                              int srcSliceH, uint8_t* dst[], int dstStride[])
01604 {
01605     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)
01606         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);
01607     else {
01608         int i;
01609         const uint8_t *srcPtr= src[0];
01610         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
01611         int length=0;
01612 
01613         /* universal length finder */
01614         while(length+c->srcW <= FFABS(dstStride[0])
01615            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;
01616         assert(length!=0);
01617 
01618         for (i=0; i<srcSliceH; i++) {
01619             memcpy(dstPtr, srcPtr, length);
01620             srcPtr+= srcStride[0];
01621             dstPtr+= dstStride[0];
01622         }
01623     }
01624     return srcSliceH;
01625 }
01626 
01627 static int planarCopyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
01628                              int srcSliceH, uint8_t* dst[], int dstStride[])
01629 {
01630     int plane, i, j;
01631     for (plane=0; plane<4; plane++) {
01632         int length= (plane==0 || plane==3) ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);
01633         int y=      (plane==0 || plane==3) ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);
01634         int height= (plane==0 || plane==3) ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);
01635         const uint8_t *srcPtr= src[plane];
01636         uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;
01637 
01638         if (!dst[plane]) continue;
01639         // ignore palette for GRAY8
01640         if (plane == 1 && !dst[2]) continue;
01641         if (!src[plane] || (plane == 1 && !src[2])) {
01642             if(is16BPS(c->dstFormat))
01643                 length*=2;
01644             fillPlane(dst[plane], dstStride[plane], length, height, y, (plane==3) ? 255 : 128);
01645         } else {
01646             if(is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)) {
01647                 if (!isBE(c->srcFormat)) srcPtr++;
01648                 for (i=0; i<height; i++) {
01649                     for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];
01650                     srcPtr+= srcStride[plane];
01651                     dstPtr+= dstStride[plane];
01652                 }
01653             } else if(!is16BPS(c->srcFormat) && is16BPS(c->dstFormat)) {
01654                 for (i=0; i<height; i++) {
01655                     for (j=0; j<length; j++) {
01656                         dstPtr[ j<<1   ] = srcPtr[j];
01657                         dstPtr[(j<<1)+1] = srcPtr[j];
01658                     }
01659                     srcPtr+= srcStride[plane];
01660                     dstPtr+= dstStride[plane];
01661                 }
01662             } else if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat)
01663                   && isBE(c->srcFormat) != isBE(c->dstFormat)) {
01664 
01665                 for (i=0; i<height; i++) {
01666                     for (j=0; j<length; j++)
01667                         ((uint16_t*)dstPtr)[j] = bswap_16(((const uint16_t*)srcPtr)[j]);
01668                     srcPtr+= srcStride[plane];
01669                     dstPtr+= dstStride[plane];
01670                 }
01671             } else if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)
01672                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);
01673             else {
01674                 if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
01675                     length*=2;
01676                 for (i=0; i<height; i++) {
01677                     memcpy(dstPtr, srcPtr, length);
01678                     srcPtr+= srcStride[plane];
01679                     dstPtr+= dstStride[plane];
01680                 }
01681             }
01682         }
01683     }
01684     return srcSliceH;
01685 }
01686 
01687 int ff_hardcodedcpuflags(void)
01688 {
01689     int flags = 0;
01690 #if   COMPILE_TEMPLATE_MMX2
01691     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;
01692 #elif COMPILE_TEMPLATE_AMD3DNOW
01693     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;
01694 #elif COMPILE_TEMPLATE_MMX
01695     flags |= SWS_CPU_CAPS_MMX;
01696 #elif COMPILE_TEMPLATE_ALTIVEC
01697     flags |= SWS_CPU_CAPS_ALTIVEC;
01698 #elif ARCH_BFIN
01699     flags |= SWS_CPU_CAPS_BFIN;
01700 #endif
01701     return flags;
01702 }
01703 
01704 void ff_get_unscaled_swscale(SwsContext *c)
01705 {
01706     const enum PixelFormat srcFormat = c->srcFormat;
01707     const enum PixelFormat dstFormat = c->dstFormat;
01708     const int flags = c->flags;
01709     const int dstH = c->dstH;
01710     int needsDither;
01711 
01712     needsDither= isAnyRGB(dstFormat)
01713         &&  c->dstFormatBpp < 24
01714         && (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
01715 
01716     /* yv12_to_nv12 */
01717     if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {
01718         c->swScale= planarToNv12Wrapper;
01719     }
01720     /* yuv2bgr */
01721     if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P || srcFormat==PIX_FMT_YUVA420P) && isAnyRGB(dstFormat)
01722         && !(flags & SWS_ACCURATE_RND) && !(dstH&1)) {
01723         c->swScale= ff_yuv2rgb_get_func_ptr(c);
01724     }
01725 
01726     if (srcFormat==PIX_FMT_YUV410P && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_BITEXACT)) {
01727         c->swScale= yvu9ToYv12Wrapper;
01728     }
01729 
01730     /* bgr24toYV12 */
01731     if (srcFormat==PIX_FMT_BGR24 && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_ACCURATE_RND))
01732         c->swScale= bgr24ToYv12Wrapper;
01733 
01734     /* RGB/BGR -> RGB/BGR (no dither needed forms) */
01735     if (   isAnyRGB(srcFormat)
01736         && isAnyRGB(dstFormat)
01737         && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8
01738         && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8
01739         && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4
01740         && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4
01741         && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE
01742         && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE
01743         && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK
01744         && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE
01745         && srcFormat != PIX_FMT_RGB48LE   && dstFormat != PIX_FMT_RGB48LE
01746         && srcFormat != PIX_FMT_RGB48BE   && dstFormat != PIX_FMT_RGB48BE
01747         && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
01748         c->swScale= rgbToRgbWrapper;
01749 
01750     if ((usePal(srcFormat) && (
01751         dstFormat == PIX_FMT_RGB32   ||
01752         dstFormat == PIX_FMT_RGB32_1 ||
01753         dstFormat == PIX_FMT_RGB24   ||
01754         dstFormat == PIX_FMT_BGR32   ||
01755         dstFormat == PIX_FMT_BGR32_1 ||
01756         dstFormat == PIX_FMT_BGR24)))
01757         c->swScale= palToRgbWrapper;
01758 
01759     if (srcFormat == PIX_FMT_YUV422P) {
01760         if (dstFormat == PIX_FMT_YUYV422)
01761             c->swScale= yuv422pToYuy2Wrapper;
01762         else if (dstFormat == PIX_FMT_UYVY422)
01763             c->swScale= yuv422pToUyvyWrapper;
01764     }
01765 
01766     /* LQ converters if -sws 0 or -sws 4*/
01767     if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
01768         /* yv12_to_yuy2 */
01769         if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {
01770             if (dstFormat == PIX_FMT_YUYV422)
01771                 c->swScale= planarToYuy2Wrapper;
01772             else if (dstFormat == PIX_FMT_UYVY422)
01773                 c->swScale= planarToUyvyWrapper;
01774         }
01775     }
01776     if(srcFormat == PIX_FMT_YUYV422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
01777         c->swScale= yuyvToYuv420Wrapper;
01778     if(srcFormat == PIX_FMT_UYVY422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
01779         c->swScale= uyvyToYuv420Wrapper;
01780     if(srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)
01781         c->swScale= yuyvToYuv422Wrapper;
01782     if(srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)
01783         c->swScale= uyvyToYuv422Wrapper;
01784 
01785 #ifdef COMPILE_ALTIVEC
01786     if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&
01787         !(c->flags & SWS_BITEXACT) &&
01788         srcFormat == PIX_FMT_YUV420P) {
01789         // unscaled YV12 -> packed YUV, we want speed
01790         if (dstFormat == PIX_FMT_YUYV422)
01791             c->swScale= yv12toyuy2_unscaled_altivec;
01792         else if (dstFormat == PIX_FMT_UYVY422)
01793             c->swScale= yv12touyvy_unscaled_altivec;
01794     }
01795 #endif
01796 
01797     /* simple copy */
01798     if (  srcFormat == dstFormat
01799         || (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P)
01800         || (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P)
01801         || (isPlanarYUV(srcFormat) && isGray(dstFormat))
01802         || (isPlanarYUV(dstFormat) && isGray(srcFormat))
01803         || (isGray(dstFormat) && isGray(srcFormat))
01804         || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)
01805             && c->chrDstHSubSample == c->chrSrcHSubSample
01806             && c->chrDstVSubSample == c->chrSrcVSubSample
01807             && dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21
01808             && srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))
01809     {
01810         if (isPacked(c->srcFormat))
01811             c->swScale= packedCopyWrapper;
01812         else /* Planar YUV or gray */
01813             c->swScale= planarCopyWrapper;
01814     }
01815 #if ARCH_BFIN
01816     if (flags & SWS_CPU_CAPS_BFIN)
01817         ff_bfin_get_unscaled_swscale (c);
01818 #endif
01819 }
01820 
01821 static void reset_ptr(const uint8_t* src[], int format)
01822 {
01823     if(!isALPHA(format))
01824         src[3]=NULL;
01825     if(!isPlanarYUV(format)) {
01826         src[3]=src[2]=NULL;
01827 
01828         if (!usePal(format))
01829             src[1]= NULL;
01830     }
01831 }
01832 
01837 int sws_scale(SwsContext *c, const uint8_t* const src[], const int srcStride[], int srcSliceY,
01838               int srcSliceH, uint8_t* const dst[], const int dstStride[])
01839 {
01840     int i;
01841     const uint8_t* src2[4]= {src[0], src[1], src[2], src[3]};
01842     uint8_t* dst2[4]= {dst[0], dst[1], dst[2], dst[3]};
01843 
01844     // do not mess up sliceDir if we have a "trailing" 0-size slice
01845     if (srcSliceH == 0)
01846         return 0;
01847 
01848     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
01849         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
01850         return 0;
01851     }
01852     if (c->sliceDir == 0) {
01853         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
01854     }
01855 
01856     if (usePal(c->srcFormat)) {
01857         for (i=0; i<256; i++) {
01858             int p, r, g, b,y,u,v;
01859             if(c->srcFormat == PIX_FMT_PAL8) {
01860                 p=((const uint32_t*)(src[1]))[i];
01861                 r= (p>>16)&0xFF;
01862                 g= (p>> 8)&0xFF;
01863                 b=  p     &0xFF;
01864             } else if(c->srcFormat == PIX_FMT_RGB8) {
01865                 r= (i>>5    )*36;
01866                 g= ((i>>2)&7)*36;
01867                 b= (i&3     )*85;
01868             } else if(c->srcFormat == PIX_FMT_BGR8) {
01869                 b= (i>>6    )*85;
01870                 g= ((i>>3)&7)*36;
01871                 r= (i&7     )*36;
01872             } else if(c->srcFormat == PIX_FMT_RGB4_BYTE) {
01873                 r= (i>>3    )*255;
01874                 g= ((i>>1)&3)*85;
01875                 b= (i&1     )*255;
01876             } else if(c->srcFormat == PIX_FMT_GRAY8) {
01877                 r = g = b = i;
01878             } else {
01879                 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);
01880                 b= (i>>3    )*255;
01881                 g= ((i>>1)&3)*85;
01882                 r= (i&1     )*255;
01883             }
01884             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
01885             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
01886             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
01887             c->pal_yuv[i]= y + (u<<8) + (v<<16);
01888 
01889             switch(c->dstFormat) {
01890             case PIX_FMT_BGR32:
01891 #if !HAVE_BIGENDIAN
01892             case PIX_FMT_RGB24:
01893 #endif
01894                 c->pal_rgb[i]=  r + (g<<8) + (b<<16);
01895                 break;
01896             case PIX_FMT_BGR32_1:
01897 #if HAVE_BIGENDIAN
01898             case PIX_FMT_BGR24:
01899 #endif
01900                 c->pal_rgb[i]= (r + (g<<8) + (b<<16)) << 8;
01901                 break;
01902             case PIX_FMT_RGB32_1:
01903 #if HAVE_BIGENDIAN
01904             case PIX_FMT_RGB24:
01905 #endif
01906                 c->pal_rgb[i]= (b + (g<<8) + (r<<16)) << 8;
01907                 break;
01908             case PIX_FMT_RGB32:
01909 #if !HAVE_BIGENDIAN
01910             case PIX_FMT_BGR24:
01911 #endif
01912             default:
01913                 c->pal_rgb[i]=  b + (g<<8) + (r<<16);
01914             }
01915         }
01916     }
01917 
01918     // copy strides, so they can safely be modified
01919     if (c->sliceDir == 1) {
01920         // slices go from top to bottom
01921         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2], srcStride[3]};
01922         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2], dstStride[3]};
01923 
01924         reset_ptr(src2, c->srcFormat);
01925         reset_ptr((const uint8_t**)dst2, c->dstFormat);
01926 
01927         /* reset slice direction at end of frame */
01928         if (srcSliceY + srcSliceH == c->srcH)
01929             c->sliceDir = 0;
01930 
01931         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2);
01932     } else {
01933         // slices go from bottom to top => we flip the image internally
01934         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3]};
01935         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3]};
01936 
01937         src2[0] += (srcSliceH-1)*srcStride[0];
01938         if (!usePal(c->srcFormat))
01939             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];
01940         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];
01941         src2[3] += (srcSliceH-1)*srcStride[3];
01942         dst2[0] += ( c->dstH                      -1)*dstStride[0];
01943         dst2[1] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1];
01944         dst2[2] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2];
01945         dst2[3] += ( c->dstH                      -1)*dstStride[3];
01946 
01947         reset_ptr(src2, c->srcFormat);
01948         reset_ptr((const uint8_t**)dst2, c->dstFormat);
01949 
01950         /* reset slice direction at end of frame */
01951         if (!srcSliceY)
01952             c->sliceDir = 0;
01953 
01954         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);
01955     }
01956 }
01957 
01958 #if LIBSWSCALE_VERSION_MAJOR < 1
01959 int sws_scale_ordered(SwsContext *c, const uint8_t* const src[], int srcStride[], int srcSliceY,
01960                       int srcSliceH, uint8_t* dst[], int dstStride[])
01961 {
01962     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);
01963 }
01964 #endif
01965 
01966 /* Convert the palette to the same packed 32-bit format as the palette */
01967 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
01968 {
01969     long i;
01970 
01971     for (i=0; i<num_pixels; i++)
01972         ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
01973 }
01974 
01975 /* Palette format: ABCD -> dst format: ABC */
01976 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
01977 {
01978     long i;
01979 
01980     for (i=0; i<num_pixels; i++) {
01981         //FIXME slow?
01982         dst[0]= palette[src[i]*4+0];
01983         dst[1]= palette[src[i]*4+1];
01984         dst[2]= palette[src[i]*4+2];
01985         dst+= 3;
01986     }
01987 }

Generated on Fri Sep 16 2011 17:17:52 for FFmpeg by  doxygen 1.7.1