dont favor the zero MV if mv0 is used (psnr per bitrate gains ranging from 0 to 0...
[libav.git] / libswscale / swscale.c
CommitLineData
fe8054c0 1/*
d026b45e
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2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
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20 * the C code (not assembly, mmx, ...) of this file can be used
21 * under the LGPL license too
d026b45e 22 */
783e9cc9 23
28bf81c9 24/*
7322a67c 25 supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09
caeaabe7 26 supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09
e09d12f4 27 {BGR,RGB}{1,4,8,15,16} support dithering
a861d4d7 28
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29 unscaled special converters (YV12=I420=IYUV, Y800=Y8)
30 YV12 -> {BGR,RGB}{1,4,8,15,16,24,32}
31 x -> x
32 YUV9 -> YV12
33 YUV9/YV12 -> Y800
34 Y800 -> YUV9/YV12
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35 BGR24 -> BGR32 & RGB24 -> RGB32
36 BGR32 -> BGR24 & RGB32 -> RGB24
4bb3fa5e 37 BGR15 -> BGR16
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38*/
39
40/*
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41tested special converters (most are tested actually but i didnt write it down ...)
42 YV12 -> BGR16
b935781b 43 YV12 -> YV12
4bb3fa5e 44 BGR15 -> BGR16
1e1c4fe9 45 BGR16 -> BGR16
e09d12f4 46 YVU9 -> YV12
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47
48untested special converters
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49 YV12/I420 -> BGR15/BGR24/BGR32 (its the yuv2rgb stuff, so it should be ok)
50 YV12/I420 -> YV12/I420
51 YUY2/BGR15/BGR24/BGR32/RGB24/RGB32 -> same format
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52 BGR24 -> BGR32 & RGB24 -> RGB32
53 BGR32 -> BGR24 & RGB32 -> RGB24
ec22603f 54 BGR24 -> YV12
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55*/
56
d3f41512 57#include <inttypes.h>
dda87e9f 58#include <string.h>
077ea8a7 59#include <math.h>
c1b0bfb4 60#include <stdio.h>
171d7d78 61#include <unistd.h>
b2d374c9 62#include "config.h"
81b7c056 63#include <assert.h>
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64#ifdef HAVE_MALLOC_H
65#include <malloc.h>
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66#else
67#include <stdlib.h>
c1b0bfb4 68#endif
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69#ifdef HAVE_SYS_MMAN_H
70#include <sys/mman.h>
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71#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
72#define MAP_ANONYMOUS MAP_ANON
73#endif
38d5c282 74#endif
d604bab9 75#include "swscale.h"
5427e242 76#include "swscale_internal.h"
94c4def2 77#include "x86_cpu.h"
b2d374c9 78#include "bswap.h"
37079906 79#include "rgb2rgb.h"
94c4def2 80#ifdef USE_FASTMEMCPY
b2d374c9 81#include "libvo/fastmemcpy.h"
94c4def2 82#endif
0d9f3d85 83
541c4eb9 84#undef MOVNTQ
7d7f78b5 85#undef PAVGB
d3f41512 86
783e9cc9 87//#undef HAVE_MMX2
7f56a527 88//#define HAVE_3DNOW
d3f41512 89//#undef HAVE_MMX
783e9cc9 90//#undef ARCH_X86
2ba1bff0 91//#define WORDS_BIGENDIAN
d604bab9 92#define DITHER1XBPP
d3f41512 93
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94#define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit
95
1e621b18 96#define RET 0xC3 //near return opcode for X86
c1b0bfb4 97
28bf81c9 98#ifdef MP_DEBUG
81b7c056 99#define ASSERT(x) assert(x);
28bf81c9 100#else
c1b0bfb4 101#define ASSERT(x) ;
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102#endif
103
104#ifdef M_PI
105#define PI M_PI
106#else
107#define PI 3.14159265358979323846
108#endif
c1b0bfb4 109
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110#define isSupportedIn(x) ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\
111 || (x)==PIX_FMT_RGB32|| (x)==PIX_FMT_BGR24|| (x)==PIX_FMT_BGR565|| (x)==PIX_FMT_BGR555\
a43fb6b3 112 || (x)==PIX_FMT_BGR32|| (x)==PIX_FMT_RGB24|| (x)==PIX_FMT_RGB565|| (x)==PIX_FMT_RGB555\
e9e12f0e 113 || (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P\
4884b9e5 114 || (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\
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115 || (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P)
116#define isSupportedOut(x) ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\
117 || (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P\
cf7d1c1a 118 || isRGB(x) || isBGR(x)\
e9e12f0e 119 || (x)==PIX_FMT_NV12 || (x)==PIX_FMT_NV21\
4884b9e5 120 || (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\
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121 || (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P)
122#define isPacked(x) ((x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422 ||isRGB(x) || isBGR(x))
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123
124#define RGB2YUV_SHIFT 16
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125#define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
126#define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
127#define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
128#define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
129#define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
130#define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
131#define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
132#define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
133#define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
6c7506de 134
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135extern const int32_t Inverse_Table_6_9[8][4];
136
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137/*
138NOTES
d604bab9 139Special versions: fast Y 1:1 scaling (no interpolation in y direction)
31190492 140
783e9cc9 141TODO
d604bab9 142more intelligent missalignment avoidance for the horizontal scaler
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143write special vertical cubic upscale version
144Optimize C code (yv12 / minmax)
ff7ba856 145add support for packed pixel yuv input & output
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146add support for Y8 output
147optimize bgr24 & bgr32
ff7ba856 148add BGR4 output support
1e621b18 149write special BGR->BGR scaler
783e9cc9 150*/
31190492 151
3d6a30d9 152#if defined(ARCH_X86)
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153static uint64_t attribute_used __attribute__((aligned(8))) bF8= 0xF8F8F8F8F8F8F8F8LL;
154static uint64_t attribute_used __attribute__((aligned(8))) bFC= 0xFCFCFCFCFCFCFCFCLL;
d604bab9 155static uint64_t __attribute__((aligned(8))) w10= 0x0010001000100010LL;
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156static uint64_t attribute_used __attribute__((aligned(8))) w02= 0x0002000200020002LL;
157static uint64_t attribute_used __attribute__((aligned(8))) bm00001111=0x00000000FFFFFFFFLL;
158static uint64_t attribute_used __attribute__((aligned(8))) bm00000111=0x0000000000FFFFFFLL;
159static uint64_t attribute_used __attribute__((aligned(8))) bm11111000=0xFFFFFFFFFF000000LL;
160static uint64_t attribute_used __attribute__((aligned(8))) bm01010101=0x00FF00FF00FF00FFLL;
d604bab9 161
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162static volatile uint64_t attribute_used __attribute__((aligned(8))) b5Dither;
163static volatile uint64_t attribute_used __attribute__((aligned(8))) g5Dither;
164static volatile uint64_t attribute_used __attribute__((aligned(8))) g6Dither;
165static volatile uint64_t attribute_used __attribute__((aligned(8))) r5Dither;
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166
167static uint64_t __attribute__((aligned(8))) dither4[2]={
168 0x0103010301030103LL,
169 0x0200020002000200LL,};
170
171static uint64_t __attribute__((aligned(8))) dither8[2]={
172 0x0602060206020602LL,
173 0x0004000400040004LL,};
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174
175static uint64_t __attribute__((aligned(8))) b16Mask= 0x001F001F001F001FLL;
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176static uint64_t attribute_used __attribute__((aligned(8))) g16Mask= 0x07E007E007E007E0LL;
177static uint64_t attribute_used __attribute__((aligned(8))) r16Mask= 0xF800F800F800F800LL;
d604bab9 178static uint64_t __attribute__((aligned(8))) b15Mask= 0x001F001F001F001FLL;
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179static uint64_t attribute_used __attribute__((aligned(8))) g15Mask= 0x03E003E003E003E0LL;
180static uint64_t attribute_used __attribute__((aligned(8))) r15Mask= 0x7C007C007C007C00LL;
d604bab9 181
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182static uint64_t attribute_used __attribute__((aligned(8))) M24A= 0x00FF0000FF0000FFLL;
183static uint64_t attribute_used __attribute__((aligned(8))) M24B= 0xFF0000FF0000FF00LL;
184static uint64_t attribute_used __attribute__((aligned(8))) M24C= 0x0000FF0000FF0000LL;
99d2cb72 185
ac6a2e45 186#ifdef FAST_BGR2YV12
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187static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000000210041000DULL;
188static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000FFEEFFDC0038ULL;
189static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00000038FFD2FFF8ULL;
ac6a2e45 190#else
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191static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000020E540830C8BULL;
192static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000ED0FDAC23831ULL;
193static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00003831D0E6F6EAULL;
69796008 194#endif /* FAST_BGR2YV12 */
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195static const uint64_t bgr2YOffset attribute_used __attribute__((aligned(8))) = 0x1010101010101010ULL;
196static const uint64_t bgr2UVOffset attribute_used __attribute__((aligned(8)))= 0x8080808080808080ULL;
197static const uint64_t w1111 attribute_used __attribute__((aligned(8))) = 0x0001000100010001ULL;
3d6a30d9 198#endif /* defined(ARCH_X86) */
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199
200// clipping helper table for C implementations:
201static unsigned char clip_table[768];
202
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203static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b);
204
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205extern const uint8_t dither_2x2_4[2][8];
206extern const uint8_t dither_2x2_8[2][8];
207extern const uint8_t dither_8x8_32[8][8];
208extern const uint8_t dither_8x8_73[8][8];
209extern const uint8_t dither_8x8_220[8][8];
5cebb24b 210
e9e12f0e 211char *sws_format_name(enum PixelFormat format)
94c4def2 212{
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213 switch (format) {
214 case PIX_FMT_YUV420P:
215 return "yuv420p";
216 case PIX_FMT_YUYV422:
217 return "yuyv422";
218 case PIX_FMT_RGB24:
219 return "rgb24";
220 case PIX_FMT_BGR24:
221 return "bgr24";
222 case PIX_FMT_YUV422P:
223 return "yuv422p";
224 case PIX_FMT_YUV444P:
225 return "yuv444p";
226 case PIX_FMT_RGB32:
227 return "rgb32";
228 case PIX_FMT_YUV410P:
229 return "yuv410p";
230 case PIX_FMT_YUV411P:
231 return "yuv411p";
232 case PIX_FMT_RGB565:
233 return "rgb565";
234 case PIX_FMT_RGB555:
235 return "rgb555";
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236 case PIX_FMT_GRAY16BE:
237 return "gray16be";
238 case PIX_FMT_GRAY16LE:
239 return "gray16le";
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240 case PIX_FMT_GRAY8:
241 return "gray8";
242 case PIX_FMT_MONOWHITE:
243 return "mono white";
244 case PIX_FMT_MONOBLACK:
245 return "mono black";
246 case PIX_FMT_PAL8:
247 return "Palette";
248 case PIX_FMT_YUVJ420P:
249 return "yuvj420p";
250 case PIX_FMT_YUVJ422P:
251 return "yuvj422p";
252 case PIX_FMT_YUVJ444P:
253 return "yuvj444p";
254 case PIX_FMT_XVMC_MPEG2_MC:
255 return "xvmc_mpeg2_mc";
256 case PIX_FMT_XVMC_MPEG2_IDCT:
257 return "xvmc_mpeg2_idct";
258 case PIX_FMT_UYVY422:
259 return "uyvy422";
260 case PIX_FMT_UYYVYY411:
261 return "uyyvyy411";
262 case PIX_FMT_RGB32_1:
263 return "rgb32x";
264 case PIX_FMT_BGR32_1:
265 return "bgr32x";
266 case PIX_FMT_BGR32:
267 return "bgr32";
268 case PIX_FMT_BGR565:
269 return "bgr565";
270 case PIX_FMT_BGR555:
271 return "bgr555";
272 case PIX_FMT_BGR8:
273 return "bgr8";
274 case PIX_FMT_BGR4:
275 return "bgr4";
276 case PIX_FMT_BGR4_BYTE:
277 return "bgr4 byte";
278 case PIX_FMT_RGB8:
279 return "rgb8";
280 case PIX_FMT_RGB4:
281 return "rgb4";
282 case PIX_FMT_RGB4_BYTE:
283 return "rgb4 byte";
284 case PIX_FMT_NV12:
285 return "nv12";
286 case PIX_FMT_NV21:
287 return "nv21";
288 default:
289 return "Unknown format";
290 }
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291}
292
3d6a30d9 293#if defined(ARCH_X86)
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294void in_asm_used_var_warning_killer()
295{
20380eb8 296 volatile int i= bF8+bFC+w10+
5ac80202 297 bm00001111+bm00000111+bm11111000+b16Mask+g16Mask+r16Mask+b15Mask+g15Mask+r15Mask+
6ff0ad6b 298 M24A+M24B+M24C+w02 + b5Dither+g5Dither+r5Dither+g6Dither+dither4[0]+dither8[0]+bm01010101;
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299 if(i) i=0;
300}
301#endif
d604bab9 302
5859233b 303static inline void yuv2yuvXinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
e3d2500f 304 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
5859233b 305 uint8_t *dest, uint8_t *uDest, uint8_t *vDest, int dstW, int chrDstW)
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306{
307 //FIXME Optimize (just quickly writen not opti..)
308 int i;
5859233b 309 for(i=0; i<dstW; i++)
e3d2500f 310 {
379a2036 311 int val=1<<18;
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312 int j;
313 for(j=0; j<lumFilterSize; j++)
314 val += lumSrc[j][i] * lumFilter[j];
315
6f209cb5 316 dest[i]= FFMIN(FFMAX(val>>19, 0), 255);
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317 }
318
319 if(uDest != NULL)
5859233b 320 for(i=0; i<chrDstW; i++)
e3d2500f 321 {
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322 int u=1<<18;
323 int v=1<<18;
e3d2500f 324 int j;
627690b5 325 for(j=0; j<chrFilterSize; j++)
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326 {
327 u += chrSrc[j][i] * chrFilter[j];
328 v += chrSrc[j][i + 2048] * chrFilter[j];
329 }
330
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331 uDest[i]= FFMIN(FFMAX(u>>19, 0), 255);
332 vDest[i]= FFMIN(FFMAX(v>>19, 0), 255);
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333 }
334}
335
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336static inline void yuv2nv12XinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
337 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
338 uint8_t *dest, uint8_t *uDest, int dstW, int chrDstW, int dstFormat)
339{
340 //FIXME Optimize (just quickly writen not opti..)
341 int i;
342 for(i=0; i<dstW; i++)
343 {
344 int val=1<<18;
345 int j;
346 for(j=0; j<lumFilterSize; j++)
347 val += lumSrc[j][i] * lumFilter[j];
348
6f209cb5 349 dest[i]= FFMIN(FFMAX(val>>19, 0), 255);
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350 }
351
352 if(uDest == NULL)
353 return;
354
e9e12f0e 355 if(dstFormat == PIX_FMT_NV12)
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356 for(i=0; i<chrDstW; i++)
357 {
358 int u=1<<18;
359 int v=1<<18;
360 int j;
361 for(j=0; j<chrFilterSize; j++)
362 {
363 u += chrSrc[j][i] * chrFilter[j];
364 v += chrSrc[j][i + 2048] * chrFilter[j];
365 }
366
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367 uDest[2*i]= FFMIN(FFMAX(u>>19, 0), 255);
368 uDest[2*i+1]= FFMIN(FFMAX(v>>19, 0), 255);
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369 }
370 else
371 for(i=0; i<chrDstW; i++)
372 {
373 int u=1<<18;
374 int v=1<<18;
375 int j;
376 for(j=0; j<chrFilterSize; j++)
377 {
378 u += chrSrc[j][i] * chrFilter[j];
379 v += chrSrc[j][i + 2048] * chrFilter[j];
380 }
381
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382 uDest[2*i]= FFMIN(FFMAX(v>>19, 0), 255);
383 uDest[2*i+1]= FFMIN(FFMAX(u>>19, 0), 255);
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384 }
385}
46de8b73 386
25593e29 387#define YSCALE_YUV_2_PACKEDX_C(type) \
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388 for(i=0; i<(dstW>>1); i++){\
389 int j;\
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390 int Y1=1<<18;\
391 int Y2=1<<18;\
392 int U=1<<18;\
393 int V=1<<18;\
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394 type *r, *b, *g;\
395 const int i2= 2*i;\
396 \
397 for(j=0; j<lumFilterSize; j++)\
398 {\
399 Y1 += lumSrc[j][i2] * lumFilter[j];\
400 Y2 += lumSrc[j][i2+1] * lumFilter[j];\
401 }\
402 for(j=0; j<chrFilterSize; j++)\
403 {\
404 U += chrSrc[j][i] * chrFilter[j];\
405 V += chrSrc[j][i+2048] * chrFilter[j];\
406 }\
407 Y1>>=19;\
408 Y2>>=19;\
409 U >>=19;\
410 V >>=19;\
411 if((Y1|Y2|U|V)&256)\
412 {\
413 if(Y1>255) Y1=255;\
414 else if(Y1<0)Y1=0;\
415 if(Y2>255) Y2=255;\
416 else if(Y2<0)Y2=0;\
417 if(U>255) U=255;\
418 else if(U<0) U=0;\
419 if(V>255) V=255;\
420 else if(V<0) V=0;\
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421 }
422
423#define YSCALE_YUV_2_RGBX_C(type) \
25593e29 424 YSCALE_YUV_2_PACKEDX_C(type)\
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425 r = c->table_rV[V];\
426 g = c->table_gU[U] + c->table_gV[V];\
427 b = c->table_bU[U];\
428
25593e29 429#define YSCALE_YUV_2_PACKED2_C \
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430 for(i=0; i<(dstW>>1); i++){\
431 const int i2= 2*i;\
432 int Y1= (buf0[i2 ]*yalpha1+buf1[i2 ]*yalpha)>>19;\
433 int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>19;\
434 int U= (uvbuf0[i ]*uvalpha1+uvbuf1[i ]*uvalpha)>>19;\
435 int V= (uvbuf0[i+2048]*uvalpha1+uvbuf1[i+2048]*uvalpha)>>19;\
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436
437#define YSCALE_YUV_2_RGB2_C(type) \
25593e29 438 YSCALE_YUV_2_PACKED2_C\
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439 type *r, *b, *g;\
440 r = c->table_rV[V];\
441 g = c->table_gU[U] + c->table_gV[V];\
442 b = c->table_bU[U];\
443
25593e29 444#define YSCALE_YUV_2_PACKED1_C \
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445 for(i=0; i<(dstW>>1); i++){\
446 const int i2= 2*i;\
447 int Y1= buf0[i2 ]>>7;\
448 int Y2= buf0[i2+1]>>7;\
449 int U= (uvbuf1[i ])>>7;\
450 int V= (uvbuf1[i+2048])>>7;\
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451
452#define YSCALE_YUV_2_RGB1_C(type) \
25593e29 453 YSCALE_YUV_2_PACKED1_C\
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454 type *r, *b, *g;\
455 r = c->table_rV[V];\
456 g = c->table_gU[U] + c->table_gV[V];\
457 b = c->table_bU[U];\
458
25593e29 459#define YSCALE_YUV_2_PACKED1B_C \
cf7d1c1a
MN
460 for(i=0; i<(dstW>>1); i++){\
461 const int i2= 2*i;\
462 int Y1= buf0[i2 ]>>7;\
463 int Y2= buf0[i2+1]>>7;\
464 int U= (uvbuf0[i ] + uvbuf1[i ])>>8;\
465 int V= (uvbuf0[i+2048] + uvbuf1[i+2048])>>8;\
46de8b73
MN
466
467#define YSCALE_YUV_2_RGB1B_C(type) \
25593e29 468 YSCALE_YUV_2_PACKED1B_C\
cf7d1c1a
MN
469 type *r, *b, *g;\
470 r = c->table_rV[V];\
471 g = c->table_gU[U] + c->table_gV[V];\
472 b = c->table_bU[U];\
473
46de8b73 474#define YSCALE_YUV_2_ANYRGB_C(func, func2)\
cf7d1c1a
MN
475 switch(c->dstFormat)\
476 {\
e9e12f0e
LA
477 case PIX_FMT_RGB32:\
478 case PIX_FMT_BGR32:\
cf7d1c1a
MN
479 func(uint32_t)\
480 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\
481 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\
482 } \
483 break;\
e9e12f0e 484 case PIX_FMT_RGB24:\
cf7d1c1a
MN
485 func(uint8_t)\
486 ((uint8_t*)dest)[0]= r[Y1];\
487 ((uint8_t*)dest)[1]= g[Y1];\
488 ((uint8_t*)dest)[2]= b[Y1];\
489 ((uint8_t*)dest)[3]= r[Y2];\
490 ((uint8_t*)dest)[4]= g[Y2];\
491 ((uint8_t*)dest)[5]= b[Y2];\
ae4cffd9 492 dest+=6;\
cf7d1c1a
MN
493 }\
494 break;\
e9e12f0e 495 case PIX_FMT_BGR24:\
cf7d1c1a
MN
496 func(uint8_t)\
497 ((uint8_t*)dest)[0]= b[Y1];\
498 ((uint8_t*)dest)[1]= g[Y1];\
499 ((uint8_t*)dest)[2]= r[Y1];\
500 ((uint8_t*)dest)[3]= b[Y2];\
501 ((uint8_t*)dest)[4]= g[Y2];\
502 ((uint8_t*)dest)[5]= r[Y2];\
ae4cffd9 503 dest+=6;\
cf7d1c1a
MN
504 }\
505 break;\
e9e12f0e
LA
506 case PIX_FMT_RGB565:\
507 case PIX_FMT_BGR565:\
cf7d1c1a
MN
508 {\
509 const int dr1= dither_2x2_8[y&1 ][0];\
510 const int dg1= dither_2x2_4[y&1 ][0];\
511 const int db1= dither_2x2_8[(y&1)^1][0];\
512 const int dr2= dither_2x2_8[y&1 ][1];\
513 const int dg2= dither_2x2_4[y&1 ][1];\
514 const int db2= dither_2x2_8[(y&1)^1][1];\
515 func(uint16_t)\
516 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
517 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
518 }\
519 }\
520 break;\
e9e12f0e
LA
521 case PIX_FMT_RGB555:\
522 case PIX_FMT_BGR555:\
cf7d1c1a
MN
523 {\
524 const int dr1= dither_2x2_8[y&1 ][0];\
525 const int dg1= dither_2x2_8[y&1 ][1];\
526 const int db1= dither_2x2_8[(y&1)^1][0];\
527 const int dr2= dither_2x2_8[y&1 ][1];\
528 const int dg2= dither_2x2_8[y&1 ][0];\
529 const int db2= dither_2x2_8[(y&1)^1][1];\
530 func(uint16_t)\
531 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
532 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
533 }\
534 }\
535 break;\
e9e12f0e
LA
536 case PIX_FMT_RGB8:\
537 case PIX_FMT_BGR8:\
cf7d1c1a
MN
538 {\
539 const uint8_t * const d64= dither_8x8_73[y&7];\
540 const uint8_t * const d32= dither_8x8_32[y&7];\
541 func(uint8_t)\
542 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];\
543 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];\
544 }\
545 }\
546 break;\
e9e12f0e
LA
547 case PIX_FMT_RGB4:\
548 case PIX_FMT_BGR4:\
cf7d1c1a
MN
549 {\
550 const uint8_t * const d64= dither_8x8_73 [y&7];\
551 const uint8_t * const d128=dither_8x8_220[y&7];\
552 func(uint8_t)\
799fd467 553 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]\
f17457ac
MN
554 + ((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);\
555 }\
556 }\
557 break;\
e9e12f0e
LA
558 case PIX_FMT_RGB4_BYTE:\
559 case PIX_FMT_BGR4_BYTE:\
f17457ac
MN
560 {\
561 const uint8_t * const d64= dither_8x8_73 [y&7];\
562 const uint8_t * const d128=dither_8x8_220[y&7];\
563 func(uint8_t)\
cf7d1c1a
MN
564 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];\
565 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];\
566 }\
567 }\
568 break;\
e9e12f0e 569 case PIX_FMT_MONOBLACK:\
cf7d1c1a
MN
570 {\
571 const uint8_t * const d128=dither_8x8_220[y&7];\
572 uint8_t *g= c->table_gU[128] + c->table_gV[128];\
573 for(i=0; i<dstW-7; i+=8){\
574 int acc;\
575 acc = g[((buf0[i ]*yalpha1+buf1[i ]*yalpha)>>19) + d128[0]];\
576 acc+= acc + g[((buf0[i+1]*yalpha1+buf1[i+1]*yalpha)>>19) + d128[1]];\
577 acc+= acc + g[((buf0[i+2]*yalpha1+buf1[i+2]*yalpha)>>19) + d128[2]];\
578 acc+= acc + g[((buf0[i+3]*yalpha1+buf1[i+3]*yalpha)>>19) + d128[3]];\
579 acc+= acc + g[((buf0[i+4]*yalpha1+buf1[i+4]*yalpha)>>19) + d128[4]];\
580 acc+= acc + g[((buf0[i+5]*yalpha1+buf1[i+5]*yalpha)>>19) + d128[5]];\
581 acc+= acc + g[((buf0[i+6]*yalpha1+buf1[i+6]*yalpha)>>19) + d128[6]];\
582 acc+= acc + g[((buf0[i+7]*yalpha1+buf1[i+7]*yalpha)>>19) + d128[7]];\
583 ((uint8_t*)dest)[0]= acc;\
ae4cffd9 584 dest++;\
cf7d1c1a
MN
585 }\
586\
587/*\
588((uint8_t*)dest)-= dstW>>4;\
589{\
590 int acc=0;\
591 int left=0;\
592 static int top[1024];\
593 static int last_new[1024][1024];\
594 static int last_in3[1024][1024];\
595 static int drift[1024][1024];\
596 int topLeft=0;\
597 int shift=0;\
598 int count=0;\
599 const uint8_t * const d128=dither_8x8_220[y&7];\
600 int error_new=0;\
601 int error_in3=0;\
602 int f=0;\
603 \
604 for(i=dstW>>1; i<dstW; i++){\
605 int in= ((buf0[i ]*yalpha1+buf1[i ]*yalpha)>>19);\
606 int in2 = (76309 * (in - 16) + 32768) >> 16;\
607 int in3 = (in2 < 0) ? 0 : ((in2 > 255) ? 255 : in2);\
608 int old= (left*7 + topLeft + top[i]*5 + top[i+1]*3)/20 + in3\
609 + (last_new[y][i] - in3)*f/256;\
610 int new= old> 128 ? 255 : 0;\
611\
05749630
DB
612 error_new+= FFABS(last_new[y][i] - new);\
613 error_in3+= FFABS(last_in3[y][i] - in3);\
cf7d1c1a
MN
614 f= error_new - error_in3*4;\
615 if(f<0) f=0;\
616 if(f>256) f=256;\
617\
618 topLeft= top[i];\
619 left= top[i]= old - new;\
620 last_new[y][i]= new;\
621 last_in3[y][i]= in3;\
622\
623 acc+= acc + (new&1);\
624 if((i&7)==6){\
625 ((uint8_t*)dest)[0]= acc;\
626 ((uint8_t*)dest)++;\
627 }\
628 }\
629}\
630*/\
631 }\
632 break;\
e9e12f0e 633 case PIX_FMT_YUYV422:\
46de8b73
MN
634 func2\
635 ((uint8_t*)dest)[2*i2+0]= Y1;\
636 ((uint8_t*)dest)[2*i2+1]= U;\
637 ((uint8_t*)dest)[2*i2+2]= Y2;\
638 ((uint8_t*)dest)[2*i2+3]= V;\
639 } \
640 break;\
e9e12f0e 641 case PIX_FMT_UYVY422:\
caeaabe7
AB
642 func2\
643 ((uint8_t*)dest)[2*i2+0]= U;\
644 ((uint8_t*)dest)[2*i2+1]= Y1;\
645 ((uint8_t*)dest)[2*i2+2]= V;\
646 ((uint8_t*)dest)[2*i2+3]= Y2;\
647 } \
648 break;\
cf7d1c1a
MN
649 }\
650
651
25593e29 652static inline void yuv2packedXinC(SwsContext *c, int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
e3d2500f 653 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
cf7d1c1a 654 uint8_t *dest, int dstW, int y)
e3d2500f 655{
cf7d1c1a
MN
656 int i;
657 switch(c->dstFormat)
e3d2500f 658 {
e9e12f0e
LA
659 case PIX_FMT_BGR32:
660 case PIX_FMT_RGB32:
cf7d1c1a
MN
661 YSCALE_YUV_2_RGBX_C(uint32_t)
662 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];
663 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];
e3d2500f 664 }
cf7d1c1a 665 break;
e9e12f0e 666 case PIX_FMT_RGB24:
cf7d1c1a
MN
667 YSCALE_YUV_2_RGBX_C(uint8_t)
668 ((uint8_t*)dest)[0]= r[Y1];
669 ((uint8_t*)dest)[1]= g[Y1];
670 ((uint8_t*)dest)[2]= b[Y1];
671 ((uint8_t*)dest)[3]= r[Y2];
672 ((uint8_t*)dest)[4]= g[Y2];
673 ((uint8_t*)dest)[5]= b[Y2];
ae4cffd9 674 dest+=6;
cf7d1c1a
MN
675 }
676 break;
e9e12f0e 677 case PIX_FMT_BGR24:
cf7d1c1a
MN
678 YSCALE_YUV_2_RGBX_C(uint8_t)
679 ((uint8_t*)dest)[0]= b[Y1];
680 ((uint8_t*)dest)[1]= g[Y1];
681 ((uint8_t*)dest)[2]= r[Y1];
682 ((uint8_t*)dest)[3]= b[Y2];
683 ((uint8_t*)dest)[4]= g[Y2];
684 ((uint8_t*)dest)[5]= r[Y2];
ae4cffd9 685 dest+=6;
cf7d1c1a
MN
686 }
687 break;
e9e12f0e
LA
688 case PIX_FMT_RGB565:
689 case PIX_FMT_BGR565:
cf7d1c1a
MN
690 {
691 const int dr1= dither_2x2_8[y&1 ][0];
692 const int dg1= dither_2x2_4[y&1 ][0];
693 const int db1= dither_2x2_8[(y&1)^1][0];
694 const int dr2= dither_2x2_8[y&1 ][1];
695 const int dg2= dither_2x2_4[y&1 ][1];
696 const int db2= dither_2x2_8[(y&1)^1][1];
697 YSCALE_YUV_2_RGBX_C(uint16_t)
698 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];
699 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];
e3d2500f 700 }
e3d2500f 701 }
cf7d1c1a 702 break;
e9e12f0e
LA
703 case PIX_FMT_RGB555:
704 case PIX_FMT_BGR555:
cf7d1c1a
MN
705 {
706 const int dr1= dither_2x2_8[y&1 ][0];
707 const int dg1= dither_2x2_8[y&1 ][1];
708 const int db1= dither_2x2_8[(y&1)^1][0];
709 const int dr2= dither_2x2_8[y&1 ][1];
710 const int dg2= dither_2x2_8[y&1 ][0];
711 const int db2= dither_2x2_8[(y&1)^1][1];
712 YSCALE_YUV_2_RGBX_C(uint16_t)
713 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];
714 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];
e3d2500f 715 }
cf7d1c1a
MN
716 }
717 break;
e9e12f0e
LA
718 case PIX_FMT_RGB8:
719 case PIX_FMT_BGR8:
cf7d1c1a
MN
720 {
721 const uint8_t * const d64= dither_8x8_73[y&7];
722 const uint8_t * const d32= dither_8x8_32[y&7];
723 YSCALE_YUV_2_RGBX_C(uint8_t)
724 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];
725 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];
e3d2500f 726 }
e3d2500f 727 }
cf7d1c1a 728 break;
e9e12f0e
LA
729 case PIX_FMT_RGB4:
730 case PIX_FMT_BGR4:
cf7d1c1a
MN
731 {
732 const uint8_t * const d64= dither_8x8_73 [y&7];
733 const uint8_t * const d128=dither_8x8_220[y&7];
734 YSCALE_YUV_2_RGBX_C(uint8_t)
799fd467 735 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]
f17457ac
MN
736 +((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);
737 }
738 }
739 break;
e9e12f0e
LA
740 case PIX_FMT_RGB4_BYTE:
741 case PIX_FMT_BGR4_BYTE:
f17457ac
MN
742 {
743 const uint8_t * const d64= dither_8x8_73 [y&7];
744 const uint8_t * const d128=dither_8x8_220[y&7];
745 YSCALE_YUV_2_RGBX_C(uint8_t)
cf7d1c1a
MN
746 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];
747 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];
e3d2500f 748 }
cf7d1c1a
MN
749 }
750 break;
e9e12f0e 751 case PIX_FMT_MONOBLACK:
cf7d1c1a
MN
752 {
753 const uint8_t * const d128=dither_8x8_220[y&7];
754 uint8_t *g= c->table_gU[128] + c->table_gV[128];
755 int acc=0;
756 for(i=0; i<dstW-1; i+=2){
757 int j;
379a2036
MN
758 int Y1=1<<18;
759 int Y2=1<<18;
cf7d1c1a
MN
760
761 for(j=0; j<lumFilterSize; j++)
762 {
763 Y1 += lumSrc[j][i] * lumFilter[j];
764 Y2 += lumSrc[j][i+1] * lumFilter[j];
765 }
766 Y1>>=19;
767 Y2>>=19;
768 if((Y1|Y2)&256)
769 {
770 if(Y1>255) Y1=255;
771 else if(Y1<0)Y1=0;
772 if(Y2>255) Y2=255;
773 else if(Y2<0)Y2=0;
774 }
775 acc+= acc + g[Y1+d128[(i+0)&7]];
776 acc+= acc + g[Y2+d128[(i+1)&7]];
777 if((i&7)==6){
778 ((uint8_t*)dest)[0]= acc;
ae4cffd9 779 dest++;
cf7d1c1a 780 }
e3d2500f 781 }
e3d2500f 782 }
cf7d1c1a 783 break;
e9e12f0e 784 case PIX_FMT_YUYV422:
25593e29 785 YSCALE_YUV_2_PACKEDX_C(void)
46de8b73
MN
786 ((uint8_t*)dest)[2*i2+0]= Y1;
787 ((uint8_t*)dest)[2*i2+1]= U;
788 ((uint8_t*)dest)[2*i2+2]= Y2;
789 ((uint8_t*)dest)[2*i2+3]= V;
790 }
791 break;
e9e12f0e 792 case PIX_FMT_UYVY422:
caeaabe7
AB
793 YSCALE_YUV_2_PACKEDX_C(void)
794 ((uint8_t*)dest)[2*i2+0]= U;
795 ((uint8_t*)dest)[2*i2+1]= Y1;
796 ((uint8_t*)dest)[2*i2+2]= V;
797 ((uint8_t*)dest)[2*i2+3]= Y2;
798 }
799 break;
e3d2500f
MN
800 }
801}
802
803
7630f2e0
MN
804//Note: we have C, X86, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
805//Plain C versions
726a959a
MN
806#if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT)
807#define COMPILE_C
808#endif
809
a2faa401 810#ifdef ARCH_POWERPC
6634d0ef 811#if defined (HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)
a2faa401
RD
812#define COMPILE_ALTIVEC
813#endif //HAVE_ALTIVEC
814#endif //ARCH_POWERPC
815
3d6a30d9 816#if defined(ARCH_X86)
726a959a
MN
817
818#if (defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
819#define COMPILE_MMX
820#endif
821
822#if defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)
823#define COMPILE_MMX2
824#endif
825
826#if (defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
827#define COMPILE_3DNOW
828#endif
6e1c66bc 829#endif //ARCH_X86 || ARCH_X86_64
726a959a
MN
830
831#undef HAVE_MMX
832#undef HAVE_MMX2
833#undef HAVE_3DNOW
726a959a
MN
834
835#ifdef COMPILE_C
7630f2e0
MN
836#undef HAVE_MMX
837#undef HAVE_MMX2
838#undef HAVE_3DNOW
a2faa401 839#undef HAVE_ALTIVEC
7630f2e0
MN
840#define RENAME(a) a ## _C
841#include "swscale_template.c"
726a959a 842#endif
397c035e 843
a2faa401
RD
844#ifdef ARCH_POWERPC
845#ifdef COMPILE_ALTIVEC
846#undef RENAME
847#define HAVE_ALTIVEC
848#define RENAME(a) a ## _altivec
849#include "swscale_template.c"
850#endif
851#endif //ARCH_POWERPC
852
3d6a30d9 853#if defined(ARCH_X86)
397c035e 854
7630f2e0
MN
855//X86 versions
856/*
857#undef RENAME
858#undef HAVE_MMX
859#undef HAVE_MMX2
860#undef HAVE_3DNOW
861#define ARCH_X86
862#define RENAME(a) a ## _X86
863#include "swscale_template.c"
1faf0867 864*/
7630f2e0 865//MMX versions
726a959a 866#ifdef COMPILE_MMX
7630f2e0
MN
867#undef RENAME
868#define HAVE_MMX
869#undef HAVE_MMX2
870#undef HAVE_3DNOW
7630f2e0
MN
871#define RENAME(a) a ## _MMX
872#include "swscale_template.c"
726a959a 873#endif
7630f2e0
MN
874
875//MMX2 versions
726a959a 876#ifdef COMPILE_MMX2
7630f2e0
MN
877#undef RENAME
878#define HAVE_MMX
879#define HAVE_MMX2
880#undef HAVE_3DNOW
7630f2e0
MN
881#define RENAME(a) a ## _MMX2
882#include "swscale_template.c"
726a959a 883#endif
7630f2e0
MN
884
885//3DNOW versions
726a959a 886#ifdef COMPILE_3DNOW
7630f2e0
MN
887#undef RENAME
888#define HAVE_MMX
889#undef HAVE_MMX2
890#define HAVE_3DNOW
7630f2e0
MN
891#define RENAME(a) a ## _3DNow
892#include "swscale_template.c"
726a959a 893#endif
7630f2e0 894
6e1c66bc 895#endif //ARCH_X86 || ARCH_X86_64
7630f2e0 896
77a416e8 897// minor note: the HAVE_xyz is messed up after that line so don't use it
d604bab9 898
a86c461c
MN
899static double getSplineCoeff(double a, double b, double c, double d, double dist)
900{
901// printf("%f %f %f %f %f\n", a,b,c,d,dist);
902 if(dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
903 else return getSplineCoeff( 0.0,
904 b+ 2.0*c + 3.0*d,
905 c + 3.0*d,
906 -b- 3.0*c - 6.0*d,
907 dist-1.0);
908}
6c7506de 909
bca11e75 910static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
c7f822d9 911 int srcW, int dstW, int filterAlign, int one, int flags,
66d1cdb6 912 SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
28bf81c9
MN
913{
914 int i;
c7f822d9
MN
915 int filterSize;
916 int filter2Size;
917 int minFilterSize;
918 double *filter=NULL;
919 double *filter2=NULL;
3d6a30d9 920#if defined(ARCH_X86)
516b1f82 921 if(flags & SWS_CPU_CAPS_MMX)
28bf81c9 922 asm volatile("emms\n\t"::: "memory"); //FIXME this shouldnt be required but it IS (even for non mmx versions)
726a959a 923#endif
31190492 924
adeaecb9 925 // Note the +1 is for the MMXscaler which reads over the end
8dfe9094 926 *filterPos = av_malloc((dstW+1)*sizeof(int16_t));
6c7506de 927
05749630 928 if(FFABS(xInc - 0x10000) <10) // unscaled
28bf81c9
MN
929 {
930 int i;
c7f822d9 931 filterSize= 1;
8dfe9094 932 filter= av_malloc(dstW*sizeof(double)*filterSize);
c7f822d9 933 for(i=0; i<dstW*filterSize; i++) filter[i]=0;
28bf81c9
MN
934
935 for(i=0; i<dstW; i++)
936 {
c7f822d9
MN
937 filter[i*filterSize]=1;
938 (*filterPos)[i]=i;
28bf81c9
MN
939 }
940
941 }
ff7ba856
MN
942 else if(flags&SWS_POINT) // lame looking point sampling mode
943 {
944 int i;
945 int xDstInSrc;
946 filterSize= 1;
8dfe9094 947 filter= av_malloc(dstW*sizeof(double)*filterSize);
ff7ba856
MN
948
949 xDstInSrc= xInc/2 - 0x8000;
950 for(i=0; i<dstW; i++)
951 {
8a01d20c 952 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
ff7ba856
MN
953
954 (*filterPos)[i]= xx;
955 filter[i]= 1.0;
956 xDstInSrc+= xInc;
957 }
958 }
a86c461c 959 else if((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale
28bf81c9
MN
960 {
961 int i;
962 int xDstInSrc;
c7f822d9
MN
963 if (flags&SWS_BICUBIC) filterSize= 4;
964 else if(flags&SWS_X ) filterSize= 4;
d8863d37 965 else filterSize= 2; // SWS_BILINEAR / SWS_AREA
8dfe9094 966 filter= av_malloc(dstW*sizeof(double)*filterSize);
28bf81c9
MN
967
968 xDstInSrc= xInc/2 - 0x8000;
969 for(i=0; i<dstW; i++)
970 {
8a01d20c 971 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
28bf81c9
MN
972 int j;
973
c7f822d9 974 (*filterPos)[i]= xx;
d8863d37 975 //Bilinear upscale / linear interpolate / Area averaging
c7f822d9 976 for(j=0; j<filterSize; j++)
28bf81c9 977 {
05749630 978 double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);
28bf81c9
MN
979 double coeff= 1.0 - d;
980 if(coeff<0) coeff=0;
c7f822d9 981 filter[i*filterSize + j]= coeff;
28bf81c9
MN
982 xx++;
983 }
28bf81c9
MN
984 xDstInSrc+= xInc;
985 }
986 }
a86c461c 987 else
28bf81c9 988 {
a86c461c
MN
989 double xDstInSrc;
990 double sizeFactor, filterSizeInSrc;
991 const double xInc1= (double)xInc / (double)(1<<16);
a86c461c
MN
992
993 if (flags&SWS_BICUBIC) sizeFactor= 4.0;
994 else if(flags&SWS_X) sizeFactor= 8.0;
995 else if(flags&SWS_AREA) sizeFactor= 1.0; //downscale only, for upscale it is bilinear
996 else if(flags&SWS_GAUSS) sizeFactor= 8.0; // infinite ;)
66d1cdb6 997 else if(flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;
93768378 998 else if(flags&SWS_SINC) sizeFactor= 20.0; // infinite ;)
a86c461c
MN
999 else if(flags&SWS_SPLINE) sizeFactor= 20.0; // infinite ;)
1000 else if(flags&SWS_BILINEAR) sizeFactor= 2.0;
93768378
MN
1001 else {
1002 sizeFactor= 0.0; //GCC warning killer
1003 ASSERT(0)
1004 }
a86c461c
MN
1005
1006 if(xInc1 <= 1.0) filterSizeInSrc= sizeFactor; // upscale
1007 else filterSizeInSrc= sizeFactor*srcW / (double)dstW;
81b7c056 1008
a86c461c
MN
1009 filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible
1010 if(filterSize > srcW-2) filterSize=srcW-2;
28bf81c9 1011
8dfe9094 1012 filter= av_malloc(dstW*sizeof(double)*filterSize);
a86c461c
MN
1013
1014 xDstInSrc= xInc1 / 2.0 - 0.5;
28bf81c9
MN
1015 for(i=0; i<dstW; i++)
1016 {
a86c461c 1017 int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);
28bf81c9 1018 int j;
c7f822d9
MN
1019 (*filterPos)[i]= xx;
1020 for(j=0; j<filterSize; j++)
28bf81c9 1021 {
05749630 1022 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;
28bf81c9 1023 double coeff;
a86c461c 1024 if(flags & SWS_BICUBIC)
28bf81c9 1025 {
66d1cdb6
MN
1026 double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;
1027 double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;
1028
1029 if(d<1.0)
1030 coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;
28bf81c9 1031 else if(d<2.0)
66d1cdb6 1032 coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;
28bf81c9
MN
1033 else
1034 coeff=0.0;
1035 }
a86c461c
MN
1036/* else if(flags & SWS_X)
1037 {
1038 double p= param ? param*0.01 : 0.3;
1039 coeff = d ? sin(d*PI)/(d*PI) : 1.0;
1040 coeff*= pow(2.0, - p*d*d);
1041 }*/
1042 else if(flags & SWS_X)
1043 {
66d1cdb6 1044 double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
a86c461c
MN
1045
1046 if(d<1.0)
1047 coeff = cos(d*PI);
1048 else
1049 coeff=-1.0;
1050 if(coeff<0.0) coeff= -pow(-coeff, A);
1051 else coeff= pow( coeff, A);
1052 coeff= coeff*0.5 + 0.5;
1053 }
d8863d37 1054 else if(flags & SWS_AREA)
28bf81c9 1055 {
a86c461c 1056 double srcPixelSize= 1.0/xInc1;
d8863d37
MN
1057 if(d + srcPixelSize/2 < 0.5) coeff= 1.0;
1058 else if(d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;
1059 else coeff=0.0;
1060 }
a86c461c
MN
1061 else if(flags & SWS_GAUSS)
1062 {
66d1cdb6 1063 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
a86c461c
MN
1064 coeff = pow(2.0, - p*d*d);
1065 }
1066 else if(flags & SWS_SINC)
1067 {
1068 coeff = d ? sin(d*PI)/(d*PI) : 1.0;
1069 }
1070 else if(flags & SWS_LANCZOS)
1071 {
66d1cdb6 1072 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
a86c461c
MN
1073 coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;
1074 if(d>p) coeff=0;
1075 }
1076 else if(flags & SWS_BILINEAR)
28bf81c9
MN
1077 {
1078 coeff= 1.0 - d;
1079 if(coeff<0) coeff=0;
1080 }
a86c461c
MN
1081 else if(flags & SWS_SPLINE)
1082 {
1083 double p=-2.196152422706632;
1084 coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);
1085 }
93768378
MN
1086 else {
1087 coeff= 0.0; //GCC warning killer
1088 ASSERT(0)
1089 }
a86c461c 1090
c7f822d9 1091 filter[i*filterSize + j]= coeff;
28bf81c9
MN
1092 xx++;
1093 }
a86c461c 1094 xDstInSrc+= xInc1;
28bf81c9
MN
1095 }
1096 }
1097
c7f822d9 1098 /* apply src & dst Filter to filter -> filter2
94c4def2 1099 av_free(filter);
c7f822d9 1100 */
81b7c056 1101 ASSERT(filterSize>0)
c7f822d9
MN
1102 filter2Size= filterSize;
1103 if(srcFilter) filter2Size+= srcFilter->length - 1;
1104 if(dstFilter) filter2Size+= dstFilter->length - 1;
81b7c056 1105 ASSERT(filter2Size>0)
8dfe9094 1106 filter2= av_malloc(filter2Size*dstW*sizeof(double));
c7f822d9
MN
1107
1108 for(i=0; i<dstW; i++)
1109 {
1110 int j;
1111 SwsVector scaleFilter;
1112 SwsVector *outVec;
1113
1114 scaleFilter.coeff= filter + i*filterSize;
1115 scaleFilter.length= filterSize;
1116
d4e24275 1117 if(srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);
c7f822d9
MN
1118 else outVec= &scaleFilter;
1119
1120 ASSERT(outVec->length == filter2Size)
1121 //FIXME dstFilter
1122
1123 for(j=0; j<outVec->length; j++)
1124 {
1125 filter2[i*filter2Size + j]= outVec->coeff[j];
1126 }
1127
1128 (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
1129
d4e24275 1130 if(outVec != &scaleFilter) sws_freeVec(outVec);
c7f822d9 1131 }
94c4def2 1132 av_free(filter); filter=NULL;
c7f822d9
MN
1133
1134 /* try to reduce the filter-size (step1 find size and shift left) */
1135 // Assume its near normalized (*0.5 or *2.0 is ok but * 0.001 is not)
1136 minFilterSize= 0;
1137 for(i=dstW-1; i>=0; i--)
1138 {
1139 int min= filter2Size;
1140 int j;
1141 double cutOff=0.0;
1142
1143 /* get rid off near zero elements on the left by shifting left */
1144 for(j=0; j<filter2Size; j++)
1145 {
1146 int k;
05749630 1147 cutOff += FFABS(filter2[i*filter2Size]);
c7f822d9
MN
1148
1149 if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
1150
77a416e8 1151 /* preserve Monotonicity because the core can't handle the filter otherwise */
c7f822d9
MN
1152 if(i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
1153
1154 // Move filter coeffs left
1155 for(k=1; k<filter2Size; k++)
1156 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
1157 filter2[i*filter2Size + k - 1]= 0.0;
1158 (*filterPos)[i]++;
1159 }
1160
1161 cutOff=0.0;
1162 /* count near zeros on the right */
1163 for(j=filter2Size-1; j>0; j--)
1164 {
05749630 1165 cutOff += FFABS(filter2[i*filter2Size + j]);
c7f822d9
MN
1166
1167 if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
1168 min--;
1169 }
1170
1171 if(min>minFilterSize) minFilterSize= min;
1172 }
1173
8c266f0c
RD
1174 if (flags & SWS_CPU_CAPS_ALTIVEC) {
1175 // we can handle the special case 4,
1176 // so we don't want to go to the full 8
1177 if (minFilterSize < 5)
1178 filterAlign = 4;
1179
1180 // we really don't want to waste our time
1181 // doing useless computation, so fall-back on
1182 // the scalar C code for very small filter.
1183 // vectorizing is worth it only if you have
1184 // decent-sized vector.
1185 if (minFilterSize < 3)
1186 filterAlign = 1;
1187 }
1188
bca11e75
MN
1189 if (flags & SWS_CPU_CAPS_MMX) {
1190 // special case for unscaled vertical filtering
1191 if(minFilterSize == 1 && filterAlign == 2)
1192 filterAlign= 1;
1193 }
1194
81b7c056 1195 ASSERT(minFilterSize > 0)
6c7506de 1196 filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
81b7c056 1197 ASSERT(filterSize > 0)
8dfe9094 1198 filter= av_malloc(filterSize*dstW*sizeof(double));
bca11e75
MN
1199 if(filterSize >= MAX_FILTER_SIZE)
1200 return -1;
6c7506de
MN
1201 *outFilterSize= filterSize;
1202
4a53a912 1203 if(flags&SWS_PRINT_INFO)
b40e353a 1204 MSG_V("SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
c7f822d9
MN
1205 /* try to reduce the filter-size (step2 reduce it) */
1206 for(i=0; i<dstW; i++)
1207 {
1208 int j;
1209
6c7506de
MN
1210 for(j=0; j<filterSize; j++)
1211 {
1212 if(j>=filter2Size) filter[i*filterSize + j]= 0.0;
1213 else filter[i*filterSize + j]= filter2[i*filter2Size + j];
1214 }
c7f822d9 1215 }
94c4def2 1216 av_free(filter2); filter2=NULL;
6c7506de 1217
c7f822d9
MN
1218
1219 //FIXME try to align filterpos if possible
1220
28bf81c9
MN
1221 //fix borders
1222 for(i=0; i<dstW; i++)
1223 {
1224 int j;
c7f822d9 1225 if((*filterPos)[i] < 0)
28bf81c9
MN
1226 {
1227 // Move filter coeffs left to compensate for filterPos
6c7506de 1228 for(j=1; j<filterSize; j++)
28bf81c9 1229 {
6f209cb5 1230 int left= FFMAX(j + (*filterPos)[i], 0);
6c7506de
MN
1231 filter[i*filterSize + left] += filter[i*filterSize + j];
1232 filter[i*filterSize + j]=0;
28bf81c9 1233 }
c7f822d9 1234 (*filterPos)[i]= 0;
28bf81c9
MN
1235 }
1236
6c7506de 1237 if((*filterPos)[i] + filterSize > srcW)
28bf81c9 1238 {
6c7506de 1239 int shift= (*filterPos)[i] + filterSize - srcW;
28bf81c9 1240 // Move filter coeffs right to compensate for filterPos
6c7506de 1241 for(j=filterSize-2; j>=0; j--)
28bf81c9 1242 {
6f209cb5 1243 int right= FFMIN(j + shift, filterSize-1);
6c7506de
MN
1244 filter[i*filterSize +right] += filter[i*filterSize +j];
1245 filter[i*filterSize +j]=0;
28bf81c9 1246 }
6c7506de 1247 (*filterPos)[i]= srcW - filterSize;
28bf81c9
MN
1248 }
1249 }
1250
6c7506de 1251 // Note the +1 is for the MMXscaler which reads over the end
5edb653b 1252 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
8dfe9094 1253 *outFilter= av_malloc(*outFilterSize*(dstW+1)*sizeof(int16_t));
6c7506de 1254 memset(*outFilter, 0, *outFilterSize*(dstW+1)*sizeof(int16_t));
c7f822d9
MN
1255
1256 /* Normalize & Store in outFilter */
28bf81c9
MN
1257 for(i=0; i<dstW; i++)
1258 {
1259 int j;
ff490720 1260 double error=0;
28bf81c9
MN
1261 double sum=0;
1262 double scale= one;
ff490720 1263
6c7506de 1264 for(j=0; j<filterSize; j++)
28bf81c9 1265 {
6c7506de 1266 sum+= filter[i*filterSize + j];
28bf81c9
MN
1267 }
1268 scale/= sum;
93768378 1269 for(j=0; j<*outFilterSize; j++)
28bf81c9 1270 {
ff490720
MN
1271 double v= filter[i*filterSize + j]*scale + error;
1272 int intV= floor(v + 0.5);
1273 (*outFilter)[i*(*outFilterSize) + j]= intV;
1274 error = v - intV;
28bf81c9
MN
1275 }
1276 }
adeaecb9
MN
1277
1278 (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
1279 for(i=0; i<*outFilterSize; i++)
1280 {
1281 int j= dstW*(*outFilterSize);
1282 (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
1283 }
c7f822d9 1284
94c4def2 1285 av_free(filter);
bca11e75 1286 return 0;
7630f2e0 1287}
31190492 1288
17c613ef 1289#ifdef COMPILE_MMX2
b7dc6f66 1290static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)
28bf81c9 1291{
b7dc6f66 1292 uint8_t *fragmentA;
6e1c66bc
AJ
1293 long imm8OfPShufW1A;
1294 long imm8OfPShufW2A;
1295 long fragmentLengthA;
b7dc6f66 1296 uint8_t *fragmentB;
6e1c66bc
AJ
1297 long imm8OfPShufW1B;
1298 long imm8OfPShufW2B;
1299 long fragmentLengthB;
b7dc6f66 1300 int fragmentPos;
28bf81c9
MN
1301
1302 int xpos, i;
1303
1304 // create an optimized horizontal scaling routine
1305
1306 //code fragment
1307
1308 asm volatile(
1309 "jmp 9f \n\t"
1310 // Begin
1311 "0: \n\t"
6e1c66bc
AJ
1312 "movq (%%"REG_d", %%"REG_a"), %%mm3\n\t"
1313 "movd (%%"REG_c", %%"REG_S"), %%mm0\n\t"
1314 "movd 1(%%"REG_c", %%"REG_S"), %%mm1\n\t"
b7dc6f66
MN
1315 "punpcklbw %%mm7, %%mm1 \n\t"
1316 "punpcklbw %%mm7, %%mm0 \n\t"
28bf81c9
MN
1317 "pshufw $0xFF, %%mm1, %%mm1 \n\t"
1318 "1: \n\t"
28bf81c9
MN
1319 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
1320 "2: \n\t"
28bf81c9 1321 "psubw %%mm1, %%mm0 \n\t"
6d606c4f 1322 "movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"
28bf81c9 1323 "pmullw %%mm3, %%mm0 \n\t"
28bf81c9
MN
1324 "psllw $7, %%mm1 \n\t"
1325 "paddw %%mm1, %%mm0 \n\t"
1326
6e1c66bc 1327 "movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"
28bf81c9 1328
6e1c66bc 1329 "add $8, %%"REG_a" \n\t"
28bf81c9
MN
1330 // End
1331 "9: \n\t"
1332// "int $3\n\t"
6e1c66bc
AJ
1333 "lea 0b, %0 \n\t"
1334 "lea 1b, %1 \n\t"
1335 "lea 2b, %2 \n\t"
1336 "dec %1 \n\t"
1337 "dec %2 \n\t"
1338 "sub %0, %1 \n\t"
1339 "sub %0, %2 \n\t"
1340 "lea 9b, %3 \n\t"
1341 "sub %0, %3 \n\t"
b7dc6f66
MN
1342
1343
1344 :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
1345 "=r" (fragmentLengthA)
28bf81c9
MN
1346 );
1347
b7dc6f66
MN
1348 asm volatile(
1349 "jmp 9f \n\t"
1350 // Begin
1351 "0: \n\t"
6e1c66bc
AJ
1352 "movq (%%"REG_d", %%"REG_a"), %%mm3\n\t"
1353 "movd (%%"REG_c", %%"REG_S"), %%mm0\n\t"
b7dc6f66
MN
1354 "punpcklbw %%mm7, %%mm0 \n\t"
1355 "pshufw $0xFF, %%mm0, %%mm1 \n\t"
1356 "1: \n\t"
1357 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
1358 "2: \n\t"
1359 "psubw %%mm1, %%mm0 \n\t"
6d606c4f 1360 "movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"
b7dc6f66
MN
1361 "pmullw %%mm3, %%mm0 \n\t"
1362 "psllw $7, %%mm1 \n\t"
1363 "paddw %%mm1, %%mm0 \n\t"
1364
6e1c66bc 1365 "movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"
28bf81c9 1366
6e1c66bc 1367 "add $8, %%"REG_a" \n\t"
b7dc6f66
MN
1368 // End
1369 "9: \n\t"
1370// "int $3\n\t"
6e1c66bc
AJ
1371 "lea 0b, %0 \n\t"
1372 "lea 1b, %1 \n\t"
1373 "lea 2b, %2 \n\t"
1374 "dec %1 \n\t"
1375 "dec %2 \n\t"
1376 "sub %0, %1 \n\t"
1377 "sub %0, %2 \n\t"
1378 "lea 9b, %3 \n\t"
1379 "sub %0, %3 \n\t"
b7dc6f66
MN
1380
1381
1382 :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
1383 "=r" (fragmentLengthB)
1384 );
1385
1386 xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
1387 fragmentPos=0;
1388
1389 for(i=0; i<dstW/numSplits; i++)
28bf81c9
MN
1390 {
1391 int xx=xpos>>16;
1392
1393 if((i&3) == 0)
1394 {
1395 int a=0;
1396 int b=((xpos+xInc)>>16) - xx;
1397 int c=((xpos+xInc*2)>>16) - xx;
1398 int d=((xpos+xInc*3)>>16) - xx;
1399
b7dc6f66
MN
1400 filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
1401 filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
1402 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
1403 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
1404 filterPos[i/2]= xx;
1405
1406 if(d+1<4)
1407 {
1408 int maxShift= 3-(d+1);
1409 int shift=0;
1410
1411 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);
1412
1413 funnyCode[fragmentPos + imm8OfPShufW1B]=
1414 (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);
1415 funnyCode[fragmentPos + imm8OfPShufW2B]=
1416 a | (b<<2) | (c<<4) | (d<<6);
1417
1418 if(i+3>=dstW) shift=maxShift; //avoid overread
1419 else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
1420
1421 if(shift && i>=shift)
1422 {
1423 funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;
1424 funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;
1425 filterPos[i/2]-=shift;
1426 }
1427
1428 fragmentPos+= fragmentLengthB;
1429 }
1430 else
1431 {
1432 int maxShift= 3-d;
1433 int shift=0;
1434
1435 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);
28bf81c9 1436
b7dc6f66
MN
1437 funnyCode[fragmentPos + imm8OfPShufW1A]=
1438 funnyCode[fragmentPos + imm8OfPShufW2A]=
1439 a | (b<<2) | (c<<4) | (d<<6);
28bf81c9 1440
b7dc6f66
MN
1441 if(i+4>=dstW) shift=maxShift; //avoid overread
1442 else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align
28bf81c9 1443
b7dc6f66
MN
1444 if(shift && i>=shift)
1445 {
1446 funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;
1447 funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;
1448 filterPos[i/2]-=shift;
1449 }
1450
1451 fragmentPos+= fragmentLengthA;
1452 }
1453
1454 funnyCode[fragmentPos]= RET;
28bf81c9
MN
1455 }
1456 xpos+=xInc;
1457 }
b7dc6f66 1458 filterPos[i/2]= xpos>>16; // needed to jump to the next part
28bf81c9 1459}
17c613ef 1460#endif /* COMPILE_MMX2 */
28bf81c9 1461
9b2283cc 1462static void globalInit(void){
31190492
A
1463 // generating tables:
1464 int i;
c1b0bfb4 1465 for(i=0; i<768; i++){
6f209cb5 1466 int c= FFMIN(FFMAX(i-256, 0), 255);
c1b0bfb4 1467 clip_table[i]=c;
b18ea156 1468 }
516b1f82 1469}
c1b0bfb4 1470
516b1f82
MN
1471static SwsFunc getSwsFunc(int flags){
1472
28bf81c9 1473#ifdef RUNTIME_CPUDETECT
3d6a30d9 1474#if defined(ARCH_X86)
28bf81c9 1475 // ordered per speed fasterst first
516b1f82
MN
1476 if(flags & SWS_CPU_CAPS_MMX2)
1477 return swScale_MMX2;
1478 else if(flags & SWS_CPU_CAPS_3DNOW)
1479 return swScale_3DNow;
1480 else if(flags & SWS_CPU_CAPS_MMX)
1481 return swScale_MMX;
28bf81c9 1482 else
516b1f82 1483 return swScale_C;
28bf81c9
MN
1484
1485#else
a2faa401
RD
1486#ifdef ARCH_POWERPC
1487 if(flags & SWS_CPU_CAPS_ALTIVEC)
1488 return swScale_altivec;
1489 else
1490 return swScale_C;
1491#endif
516b1f82 1492 return swScale_C;
3d6a30d9 1493#endif /* defined(ARCH_X86) */
28bf81c9
MN
1494#else //RUNTIME_CPUDETECT
1495#ifdef HAVE_MMX2
516b1f82 1496 return swScale_MMX2;
28bf81c9 1497#elif defined (HAVE_3DNOW)
516b1f82 1498 return swScale_3DNow;
28bf81c9 1499#elif defined (HAVE_MMX)
516b1f82 1500 return swScale_MMX;
a2faa401
RD
1501#elif defined (HAVE_ALTIVEC)
1502 return swScale_altivec;
28bf81c9 1503#else
516b1f82 1504 return swScale_C;
28bf81c9
MN
1505#endif
1506#endif //!RUNTIME_CPUDETECT
31190492 1507}
7630f2e0 1508
d4e24275 1509static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
0d9f3d85
A
1510 int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1511 uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1512 /* Copy Y plane */
12e11662 1513 if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
0d9f3d85
A
1514 memcpy(dst, src[0], srcSliceH*dstStride[0]);
1515 else
1516 {
1517 int i;
1518 uint8_t *srcPtr= src[0];
1519 uint8_t *dstPtr= dst;
1520 for(i=0; i<srcSliceH; i++)
1521 {
6118e52e 1522 memcpy(dstPtr, srcPtr, c->srcW);
0d9f3d85
A
1523 srcPtr+= srcStride[0];
1524 dstPtr+= dstStride[0];
1525 }
1526 }
6118e52e 1527 dst = dstParam[1] + dstStride[1]*srcSliceY/2;
e9e12f0e 1528 if (c->dstFormat == PIX_FMT_NV12)
6118e52e
VS
1529 interleaveBytes( src[1],src[2],dst,c->srcW/2,srcSliceH/2,srcStride[1],srcStride[2],dstStride[0] );
1530 else
1531 interleaveBytes( src[2],src[1],dst,c->srcW/2,srcSliceH/2,srcStride[2],srcStride[1],dstStride[0] );
fccb9b2b 1532
d4e24275 1533 return srcSliceH;
0d9f3d85
A
1534}
1535
d4e24275 1536static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
0d9f3d85
A
1537 int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1538 uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1539
fccb9b2b
MN
1540 yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
1541
d4e24275 1542 return srcSliceH;
0d9f3d85
A
1543}
1544
caeaabe7
AB
1545static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1546 int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1547 uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1548
1549 yv12touyvy( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
1550
1551 return srcSliceH;
1552}
1553
e09d12f4 1554/* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */
d4e24275 1555static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
e09d12f4
MN
1556 int srcSliceH, uint8_t* dst[], int dstStride[]){
1557 const int srcFormat= c->srcFormat;
1558 const int dstFormat= c->dstFormat;
e9e12f0e
LA
1559 const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;
1560 const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;
1561 const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */
1562 const int dstId= fmt_depth(dstFormat) >> 2;
73cbfb1c 1563 void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;
e09d12f4
MN
1564
1565 /* BGR -> BGR */
20380eb8
MN
1566 if( (isBGR(srcFormat) && isBGR(dstFormat))
1567 || (isRGB(srcFormat) && isRGB(dstFormat))){
e09d12f4
MN
1568 switch(srcId | (dstId<<4)){
1569 case 0x34: conv= rgb16to15; break;
1570 case 0x36: conv= rgb24to15; break;
1571 case 0x38: conv= rgb32to15; break;
1572 case 0x43: conv= rgb15to16; break;
1573 case 0x46: conv= rgb24to16; break;
1574 case 0x48: conv= rgb32to16; break;
1575 case 0x63: conv= rgb15to24; break;
1576 case 0x64: conv= rgb16to24; break;
1577 case 0x68: conv= rgb32to24; break;
1578 case 0x83: conv= rgb15to32; break;
1579 case 0x84: conv= rgb16to32; break;
1580 case 0x86: conv= rgb24to32; break;
1581 default: MSG_ERR("swScaler: internal error %s -> %s converter\n",
94c4def2 1582 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
b935781b 1583 }
20380eb8
MN
1584 }else if( (isBGR(srcFormat) && isRGB(dstFormat))
1585 || (isRGB(srcFormat) && isBGR(dstFormat))){
e09d12f4
MN
1586 switch(srcId | (dstId<<4)){
1587 case 0x33: conv= rgb15tobgr15; break;
1588 case 0x34: conv= rgb16tobgr15; break;
1589 case 0x36: conv= rgb24tobgr15; break;
1590 case 0x38: conv= rgb32tobgr15; break;
1591 case 0x43: conv= rgb15tobgr16; break;
1592 case 0x44: conv= rgb16tobgr16; break;
1593 case 0x46: conv= rgb24tobgr16; break;
1594 case 0x48: conv= rgb32tobgr16; break;
1595 case 0x63: conv= rgb15tobgr24; break;
1596 case 0x64: conv= rgb16tobgr24; break;
1597 case 0x66: conv= rgb24tobgr24; break;
1598 case 0x68: conv= rgb32tobgr24; break;
1599 case 0x83: conv= rgb15tobgr32; break;
1600 case 0x84: conv= rgb16tobgr32; break;
1601 case 0x86: conv= rgb24tobgr32; break;
1602 case 0x88: conv= rgb32tobgr32; break;
1603 default: MSG_ERR("swScaler: internal error %s -> %s converter\n",
94c4def2 1604 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
0d9f3d85 1605 }
20380eb8
MN
1606 }else{
1607 MSG_ERR("swScaler: internal error %s -> %s converter\n",
94c4def2 1608 sws_format_name(srcFormat), sws_format_name(dstFormat));
e09d12f4 1609 }
20380eb8 1610
e09d12f4
MN
1611 if(dstStride[0]*srcBpp == srcStride[0]*dstBpp)
1612 conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);
0d9f3d85
A
1613 else
1614 {
1615 int i;
1616 uint8_t *srcPtr= src[0];
1617 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
1618
1619 for(i=0; i<srcSliceH; i++)
1620 {
e09d12f4 1621 conv(srcPtr, dstPtr, c->srcW*srcBpp);
0d9f3d85
A
1622 srcPtr+= srcStride[0];
1623 dstPtr+= dstStride[0];
1624 }
1625 }
d4e24275 1626 return srcSliceH;
0d9f3d85
A
1627}
1628
d4e24275 1629static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
ec22603f
MN
1630 int srcSliceH, uint8_t* dst[], int dstStride[]){
1631
1632 rgb24toyv12(
1633 src[0],
1634 dst[0]+ srcSliceY *dstStride[0],
1635 dst[1]+(srcSliceY>>1)*dstStride[1],
1636 dst[2]+(srcSliceY>>1)*dstStride[2],
1637 c->srcW, srcSliceH,
1638 dstStride[0], dstStride[1], srcStride[0]);
d4e24275 1639 return srcSliceH;
ec22603f
MN
1640}
1641
d4e24275 1642static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
b241cbf2
MN
1643 int srcSliceH, uint8_t* dst[], int dstStride[]){
1644 int i;
1645
1646 /* copy Y */
12e11662 1647 if(srcStride[0]==dstStride[0] && srcStride[0] > 0)
b241cbf2
MN
1648 memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);
1649 else{
1650 uint8_t *srcPtr= src[0];
1651 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
1652
1653 for(i=0; i<srcSliceH; i++)
1654 {
1655 memcpy(dstPtr, srcPtr, c->srcW);
1656 srcPtr+= srcStride[0];
1657 dstPtr+= dstStride[0];
1658 }
1659 }
1660
e9e12f0e 1661 if(c->dstFormat==PIX_FMT_YUV420P){
b241cbf2
MN
1662 planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);
1663 planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);
1664 }else{
1665 planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);
1666 planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);
1667 }
d4e24275 1668 return srcSliceH;
b241cbf2
MN
1669}
1670
b6654a54 1671/* unscaled copy like stuff (assumes nearly identical formats) */
3e499f53
MN
1672static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1673 int srcSliceH, uint8_t* dst[], int dstStride[]){
b6654a54
MN
1674
1675 if(isPacked(c->srcFormat))
1676 {
12e11662 1677 if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
b6654a54
MN
1678 memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);
1679 else
1680 {
1681 int i;
1682 uint8_t *srcPtr= src[0];
1683 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
a861d4d7
MN
1684 int length=0;
1685
1686 /* universal length finder */
05749630
DB
1687 while(length+c->srcW <= FFABS(dstStride[0])
1688 && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;
a861d4d7 1689 ASSERT(length!=0);
b6654a54
MN
1690
1691 for(i=0; i<srcSliceH; i++)
1692 {
1693 memcpy(dstPtr, srcPtr, length);
1694 srcPtr+= srcStride[0];
1695 dstPtr+= dstStride[0];
1696 }
1697 }
1698 }
1699 else
44c1035c 1700 { /* Planar YUV or gray */
b6654a54
MN
1701 int plane;
1702 for(plane=0; plane<3; plane++)
1703 {
e616aa93
MN
1704 int length= plane==0 ? c->srcW : -((-c->srcW )>>c->chrDstHSubSample);
1705 int y= plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);
1706 int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);
44c1035c
MN
1707
1708 if((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)
0d9f3d85 1709 {
44c1035c 1710 if(!isGray(c->dstFormat))
e616aa93 1711 memset(dst[plane], 128, dstStride[plane]*height);
0d9f3d85 1712 }
b6654a54
MN
1713 else
1714 {
12e11662 1715 if(dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)
44c1035c
MN
1716 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);
1717 else
b6654a54 1718 {
44c1035c
MN
1719 int i;
1720 uint8_t *srcPtr= src[plane];
1721 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;
1722 for(i=0; i<height; i++)
1723 {
1724 memcpy(dstPtr, srcPtr, length);
1725 srcPtr+= srcStride[plane];
1726 dstPtr+= dstStride[plane];
1727 }
b6654a54
MN
1728 }
1729 }
1730 }
1731 }
d4e24275 1732 return srcSliceH;
37079906 1733}
28bf81c9 1734
4884b9e5
KS
1735static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1736 int srcSliceH, uint8_t* dst[], int dstStride[]){
1737
1738 int length= c->srcW;
1739 int y= srcSliceY;
1740 int height= srcSliceH;
1741 int i, j;
1742 uint8_t *srcPtr= src[0];
1743 uint8_t *dstPtr= dst[0] + dstStride[0]*y;
1744
1745 if(!isGray(c->dstFormat)){
1746 int height= -((-srcSliceH)>>c->chrDstVSubSample);
1747 memset(dst[1], 128, dstStride[1]*height);
1748 memset(dst[2], 128, dstStride[2]*height);
1749 }
1750 if(c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;
1751 for(i=0; i<height; i++)
1752 {
1753 for(j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];
1754 srcPtr+= srcStride[0];
1755 dstPtr+= dstStride[0];
1756 }
1757 return srcSliceH;
1758}
1759
1760static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1761 int srcSliceH, uint8_t* dst[], int dstStride[]){
1762
1763 int length= c->srcW;
1764 int y= srcSliceY;
1765 int height= srcSliceH;
1766 int i, j;
1767 uint8_t *srcPtr= src[0];
1768 uint8_t *dstPtr= dst[0] + dstStride[0]*y;
1769 for(i=0; i<height; i++)
1770 {
1771 for(j=0; j<length; j++)
1772 {
1773 dstPtr[j<<1] = srcPtr[j];
1774 dstPtr[(j<<1)+1] = srcPtr[j];
1775 }
1776 srcPtr+= srcStride[0];
1777 dstPtr+= dstStride[0];
1778 }
1779 return srcSliceH;
1780}
1781
1782static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1783 int srcSliceH, uint8_t* dst[], int dstStride[]){
1784
1785 int length= c->srcW;
1786 int y= srcSliceY;
1787 int height= srcSliceH;
1788 int i, j;
1789 uint16_t *srcPtr= src[0];
1790 uint16_t *dstPtr= dst[0] + dstStride[0]*y/2;
1791 for(i=0; i<height; i++)
1792 {
1793 for(j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);
1794 srcPtr+= srcStride[0]/2;
1795 dstPtr+= dstStride[0]/2;
1796 }
1797 return srcSliceH;
1798}
1799
1800
c7a810cc
MN
1801static void getSubSampleFactors(int *h, int *v, int format){
1802 switch(format){
e9e12f0e
LA
1803 case PIX_FMT_UYVY422:
1804 case PIX_FMT_YUYV422:
c7a810cc
MN
1805 *h=1;
1806 *v=0;
1807 break;
e9e12f0e 1808 case PIX_FMT_YUV420P:
4884b9e5
KS
1809 case PIX_FMT_GRAY16BE:
1810 case PIX_FMT_GRAY16LE:
e9e12f0e
LA
1811 case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented
1812 case PIX_FMT_NV12:
1813 case PIX_FMT_NV21:
c7a810cc
MN
1814 *h=1;
1815 *v=1;
1816 break;
e9e12f0e 1817 case PIX_FMT_YUV410P:
c7a810cc
MN
1818 *h=2;
1819 *v=2;
1820 break;
e9e12f0e 1821 case PIX_FMT_YUV444P:
d80e2fa2
MN
1822 *h=0;
1823 *v=0;
1824 break;
e9e12f0e 1825 case PIX_FMT_YUV422P:
d80e2fa2
MN
1826 *h=1;
1827 *v=0;
1828 break;
e9e12f0e 1829 case PIX_FMT_YUV411P:
d80e2fa2
MN
1830 *h=2;
1831 *v=0;
1832 break;
c7a810cc
MN
1833 default:
1834 *h=0;
1835 *v=0;
1836 break;
1837 }
1838}
1839
5427e242
MN
1840static uint16_t roundToInt16(int64_t f){
1841 int r= (f + (1<<15))>>16;
1842 if(r<-0x7FFF) return 0x8000;
1843 else if(r> 0x7FFF) return 0x7FFF;
1844 else return r;
0481412a
MN
1845}
1846
1847/**
5427e242 1848 * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]
0481412a 1849 * @param fullRange if 1 then the luma range is 0..255 if 0 its 16..235
5427e242 1850 * @return -1 if not supported
0481412a 1851 */
5427e242
MN
1852int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){
1853 int64_t crv = inv_table[0];
1854 int64_t cbu = inv_table[1];
1855 int64_t cgu = -inv_table[2];
1856 int64_t cgv = -inv_table[3];
1857 int64_t cy = 1<<16;
1858 int64_t oy = 0;
1859
1860 if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
1861 memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
1862 memcpy(c->dstColorspaceTable, table, sizeof(int)*4);
1863
1864 c->brightness= brightness;
1865 c->contrast = contrast;
1866 c->saturation= saturation;
1867 c->srcRange = srcRange;
1868 c->dstRange = dstRange;
0481412a
MN
1869
1870 c->uOffset= 0x0400040004000400LL;
1871 c->vOffset= 0x0400040004000400LL;
1872
5427e242
MN
1873 if(!srcRange){
1874 cy= (cy*255) / 219;
1875 oy= 16<<16;
0481412a
MN
1876 }
1877
5427e242
MN
1878 cy = (cy *contrast )>>16;
1879 crv= (crv*contrast * saturation)>>32;
1880 cbu= (cbu*contrast * saturation)>>32;
1881 cgu= (cgu*contrast * saturation)>>32;
1882 cgv= (cgv*contrast * saturation)>>32;
0481412a 1883
5427e242 1884 oy -= 256*brightness;
0481412a
MN
1885
1886 c->yCoeff= roundToInt16(cy *8192) * 0x0001000100010001ULL;
1887 c->vrCoeff= roundToInt16(crv*8192) * 0x0001000100010001ULL;
1888 c->ubCoeff= roundToInt16(cbu*8192) * 0x0001000100010001ULL;
1889 c->vgCoeff= roundToInt16(cgv*8192) * 0x0001000100010001ULL;
1890 c->ugCoeff= roundToInt16(cgu*8192) * 0x0001000100010001ULL;
1891 c->yOffset= roundToInt16(oy * 8) * 0x0001000100010001ULL;
5427e242
MN
1892
1893 yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
1894 //FIXME factorize
a31de956 1895
6634d0ef
NP
1896#ifdef COMPILE_ALTIVEC
1897 if (c->flags & SWS_CPU_CAPS_ALTIVEC)
1898 yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);
a31de956 1899#endif
5427e242
MN
1900 return 0;
1901}
1902
1903/**
1904 * @return -1 if not supported
1905 */
1906int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){
1907 if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
1908
1909 *inv_table = c->srcColorspaceTable;
1910 *table = c->dstColorspaceTable;
1911 *srcRange = c->srcRange;
1912 *dstRange = c->dstRange;
1913 *brightness= c->brightness;
1914 *contrast = c->contrast;
1915 *saturation= c->saturation;
1916
1917 return 0;
0481412a
MN
1918}
1919
44cdb423
LA
1920static int handle_jpeg(int *format)
1921{
1922 switch (*format) {
1923 case PIX_FMT_YUVJ420P:
1924 *format = PIX_FMT_YUV420P;
1925 return 1;
1926 case PIX_FMT_YUVJ422P:
1927 *format = PIX_FMT_YUV422P;
1928 return 1;
1929 case PIX_FMT_YUVJ444P:
1930 *format = PIX_FMT_YUV444P;
1931 return 1;
1932 default:
1933 return 0;
1934 }
1935}
1936
e9e12f0e 1937SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
66d1cdb6 1938 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){
28bf81c9 1939
28bf81c9
MN
1940 SwsContext *c;
1941 int i;
ec62c38f 1942 int usesVFilter, usesHFilter;
e09d12f4 1943 int unscaled, needsDither;
44cdb423 1944 int srcRange, dstRange;
c7f822d9 1945 SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
3d6a30d9 1946#if defined(ARCH_X86)
516b1f82 1947 if(flags & SWS_CPU_CAPS_MMX)
5cebb24b
MN
1948 asm volatile("emms\n\t"::: "memory");
1949#endif
516b1f82
MN
1950
1951#ifndef RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off
a2faa401 1952 flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC);
516b1f82
MN
1953#ifdef HAVE_MMX2
1954 flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;
1955#elif defined (HAVE_3DNOW)
1956 flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;
1957#elif defined (HAVE_MMX)
1958 flags |= SWS_CPU_CAPS_MMX;
a2faa401
RD
1959#elif defined (HAVE_ALTIVEC)
1960 flags |= SWS_CPU_CAPS_ALTIVEC;
516b1f82 1961#endif
69796008 1962#endif /* RUNTIME_CPUDETECT */
516b1f82 1963 if(clip_table[512] != 255) globalInit();
700490a4 1964 if(rgb15to16 == NULL) sws_rgb2rgb_init(flags);
fccb9b2b 1965
44c1035c 1966 unscaled = (srcW == dstW && srcH == dstH);
e09d12f4 1967 needsDither= (isBGR(dstFormat) || isRGB(dstFormat))
e9e12f0e
LA
1968 && (fmt_depth(dstFormat))<24
1969 && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));
44c1035c 1970
44cdb423
LA
1971 srcRange = handle_jpeg(&srcFormat);
1972 dstRange = handle_jpeg(&dstFormat);
1973
44c1035c 1974 if(!isSupportedIn(srcFormat))
b81cf274 1975 {
94c4def2 1976 MSG_ERR("swScaler: %s is not supported as input format\n", sws_format_name(srcFormat));
44c1035c
MN
1977 return NULL;
1978 }
1979 if(!isSupportedOut(dstFormat))
1980 {
94c4def2 1981 MSG_ERR("swScaler: %s is not supported as output format\n", sws_format_name(dstFormat));
44c1035c 1982 return NULL;
b81cf274 1983 }
44c1035c 1984
28bf81c9 1985 /* sanity check */
b81cf274
MN
1986 if(srcW<4 || srcH<1 || dstW<8 || dstH<1) //FIXME check if these are enough and try to lowwer them after fixing the relevant parts of the code
1987 {
0d9f3d85 1988 MSG_ERR("swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
b81cf274
MN
1989 srcW, srcH, dstW, dstH);
1990 return NULL;
1991 }
28bf81c9 1992
c7f822d9
MN
1993 if(!dstFilter) dstFilter= &dummyFilter;
1994 if(!srcFilter) srcFilter= &dummyFilter;
1995
8dfe9094 1996 c= av_malloc(sizeof(SwsContext));
c7f822d9 1997 memset(c, 0, sizeof(SwsContext));
28bf81c9
MN
1998
1999 c->srcW= srcW;
2000 c->srcH= srcH;
2001 c->dstW= dstW;
2002 c->dstH= dstH;
5521b193
MN
2003 c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
2004 c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
28bf81c9
MN
2005 c->flags= flags;
2006 c->dstFormat= dstFormat;
2007 c->srcFormat= srcFormat;
379a2036 2008 c->vRounder= 4* 0x0001000100010001ULL;
28bf81c9 2009
ec62c38f
MN
2010 usesHFilter= usesVFilter= 0;
2011 if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesVFilter=1;
2012 if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesHFilter=1;
2013 if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesVFilter=1;
2014 if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesHFilter=1;
2015 if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesVFilter=1;
2016 if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesHFilter=1;
2017 if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesVFilter=1;
2018 if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesHFilter=1;
e616aa93
MN
2019
2020 getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
2021 getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
2022
2023 // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation
2024 if((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
2025
5859233b
MN
2026 // drop some chroma lines if the user wants it
2027 c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
2028 c->chrSrcVSubSample+= c->vChrDrop;
e616aa93 2029
5859233b 2030 // drop every 2. pixel for chroma calculation unless user wants full chroma
e616aa93
MN
2031 if((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP))
2032 c->chrSrcHSubSample=1;
2033
66d1cdb6
MN
2034 if(param){
2035 c->param[0] = param[0];
2036 c->param[1] = param[1];
2037 }else{
2038 c->param[0] =
2039 c->param[1] = SWS_PARAM_DEFAULT;
2040 }
2041
e616aa93
MN
2042 c->chrIntHSubSample= c->chrDstHSubSample;
2043 c->chrIntVSubSample= c->chrSrcVSubSample;
5427e242 2044
e616aa93
MN
2045 // note the -((-x)>>y) is so that we allways round toward +inf
2046 c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
2047 c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
2048 c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
2049 c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
5427e242 2050
44cdb423 2051 sws_setColorspaceDetails(c, Inverse_Table_6_9[SWS_CS_DEFAULT], srcRange, Inverse_Table_6_9[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);
cf7d1c1a 2052
b935781b 2053 /* unscaled special Cases */
ec62c38f 2054 if(unscaled && !usesHFilter && !usesVFilter)
37079906 2055 {
0d9f3d85 2056 /* yv12_to_nv12 */
e9e12f0e 2057 if(srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))
0d9f3d85
A
2058 {
2059 c->swScale= PlanarToNV12Wrapper;
0d9f3d85 2060 }
37079906 2061 /* yuv2bgr */
e9e12f0e 2062 if((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))
37079906 2063 {
5427e242 2064 c->swScale= yuv2rgb_get_func_ptr(c);
37079906 2065 }
b241cbf2 2066
e9e12f0e 2067 if( srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P )
b241cbf2
MN
2068 {
2069 c->swScale= yvu9toyv12Wrapper;
b241cbf2
MN
2070 }
2071
ec22603f 2072 /* bgr24toYV12 */
e9e12f0e 2073 if(srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)
ec22603f 2074 c->swScale= bgr24toyv12Wrapper;
e09d12f4
MN
2075
2076 /* rgb/bgr -> rgb/bgr (no dither needed forms) */
2077 if( (isBGR(srcFormat) || isRGB(srcFormat))
2078 && (isBGR(dstFormat) || isRGB(dstFormat))
2079 && !needsDither)
2080 c->swScale= rgb2rgbWrapper;
2081
2082 /* LQ converters if -sws 0 or -sws 4*/
2083 if(c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){
2084 /* rgb/bgr -> rgb/bgr (dither needed forms) */
2085 if( (isBGR(srcFormat) || isRGB(srcFormat))
2086 && (isBGR(dstFormat) || isRGB(dstFormat))
2087 && needsDither)
2088 c->swScale= rgb2rgbWrapper;
2ce486d8
MN
2089
2090 /* yv12_to_yuy2 */
e9e12f0e
LA
2091 if(srcFormat == PIX_FMT_YUV420P &&
2092 (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))
2ce486d8 2093 {
e9e12f0e 2094 if (dstFormat == PIX_FMT_YUYV422)
caeaabe7
AB
2095 c->swScale= PlanarToYuy2Wrapper;
2096 else
2097 c->swScale= PlanarToUyvyWrapper;
2ce486d8 2098 }
e09d12f4 2099 }
ec22603f 2100
6634d0ef 2101#ifdef COMPILE_ALTIVEC
b71cf33c 2102 if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&
e9e12f0e
LA
2103 ((srcFormat == PIX_FMT_YUV420P &&
2104 (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {
b71cf33c 2105 // unscaled YV12 -> packed YUV, we want speed
e9e12f0e 2106 if (dstFormat == PIX_FMT_YUYV422)
b71cf33c
RD
2107 c->swScale= yv12toyuy2_unscaled_altivec;
2108 else
2109 c->swScale= yv12touyvy_unscaled_altivec;
2110 }
2111#endif
2112
20380eb8
MN
2113 /* simple copy */
2114 if( srcFormat == dstFormat
20380eb8
MN
2115 || (isPlanarYUV(srcFormat) && isGray(dstFormat))
2116 || (isPlanarYUV(dstFormat) && isGray(srcFormat))
2117 )
2118 {
2119 c->swScale= simpleCopy;
2120 }
2121
4884b9e5
KS
2122 /* gray16{le,be} conversions */
2123 if(isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))
2124 {
2125 c->swScale= gray16togray;
2126 }
2127 if((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))
2128 {
2129 c->swScale= graytogray16;
2130 }
2131 if(srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))
2132 {
2133 c->swScale= gray16swap;
2134 }
2135
e09d12f4 2136 if(c->swScale){
ec22603f 2137 if(flags&SWS_PRINT_INFO)
0d9f3d85 2138 MSG_INFO("SwScaler: using unscaled %s -> %s special converter\n",
94c4def2 2139 sws_format_name(srcFormat), sws_format_name(dstFormat));
ec22603f
MN
2140 return c;
2141 }
37079906
MN
2142 }
2143
516b1f82 2144 if(flags & SWS_CPU_CAPS_MMX2)
28bf81c9
MN
2145 {
2146 c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
2147 if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))
2148 {
2149 if(flags&SWS_PRINT_INFO)
0d9f3d85 2150 MSG_INFO("SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");
28bf81c9 2151 }
ec62c38f 2152 if(usesHFilter) c->canMMX2BeUsed=0;
28bf81c9
MN
2153 }
2154 else
2155 c->canMMX2BeUsed=0;
2156
1e621b18
MN
2157 c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
2158 c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
2159
28bf81c9
MN
2160 // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
2161 // but only for the FAST_BILINEAR mode otherwise do correct scaling
2162 // n-2 is the last chrominance sample available
2163 // this is not perfect, but noone shuld notice the difference, the more correct variant
2164 // would be like the vertical one, but that would require some special code for the
2165 // first and last pixel
2166 if(flags&SWS_FAST_BILINEAR)
2167 {
1e621b18
MN
2168 if(c->canMMX2BeUsed)
2169 {
2170 c->lumXInc+= 20;
2171 c->chrXInc+= 20;
2172 }
77a416e8 2173 //we don't use the x86asm scaler if mmx is available
516b1f82 2174 else if(flags & SWS_CPU_CAPS_MMX)
1e621b18
MN
2175 {
2176 c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
2177 c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
2178 }
28bf81c9
MN
2179 }
2180
28bf81c9
MN
2181 /* precalculate horizontal scaler filter coefficients */
2182 {
8c266f0c
RD
2183 const int filterAlign=
2184 (flags & SWS_CPU_CAPS_MMX) ? 4 :
2185 (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
2186 1;
28bf81c9 2187
c7f822d9 2188 initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
81a571a8
MN
2189 srcW , dstW, filterAlign, 1<<14,
2190 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags,
66d1cdb6 2191 srcFilter->lumH, dstFilter->lumH, c->param);
c7f822d9 2192 initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
81a571a8
MN
2193 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
2194 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
66d1cdb6 2195 srcFilter->chrH, dstFilter->chrH, c->param);
28bf81c9 2196
dbdae6ec 2197#define MAX_FUNNY_CODE_SIZE 10000
17c613ef 2198#if defined(COMPILE_MMX2)
77a416e8 2199// can't downscale !!!
28bf81c9
MN
2200 if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))
2201 {
113ef149 2202#ifdef MAP_ANONYMOUS
38d5c282
AJ
2203 c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
2204 c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
2205#else
8dfe9094
RD
2206 c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);
2207 c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);
38d5c282
AJ
2208#endif
2209
8dfe9094
RD
2210 c->lumMmx2Filter = av_malloc((dstW /8+8)*sizeof(int16_t));
2211 c->chrMmx2Filter = av_malloc((c->chrDstW /4+8)*sizeof(int16_t));
2212 c->lumMmx2FilterPos= av_malloc((dstW /2/8+8)*sizeof(int32_t));
2213 c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));
b7dc6f66
MN
2214
2215 initMMX2HScaler( dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);
2216 initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);
28bf81c9 2217 }
17c613ef 2218#endif /* defined(COMPILE_MMX2) */
28bf81c9
MN
2219 } // Init Horizontal stuff
2220
2221
2222
2223 /* precalculate vertical scaler filter coefficients */
8c266f0c
RD
2224 {
2225 const int filterAlign=
bca11e75 2226 (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
8c266f0c
RD
2227 (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
2228 1;
2229
2230 initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
2231 srcH , dstH, filterAlign, (1<<12)-4,
2232 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags,
66d1cdb6 2233 srcFilter->lumV, dstFilter->lumV, c->param);
8c266f0c
RD
2234 initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
2235 c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,
2236 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
66d1cdb6 2237 srcFilter->chrV, dstFilter->chrV, c->param);
d33d485e
AC
2238
2239#ifdef HAVE_ALTIVEC
8dfe9094 2240 c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);
d8cfa553 2241 c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);
d33d485e
AC
2242
2243 for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
2244 int j;
2245 short *p = (short *)&c->vYCoeffsBank[i];
2246 for (j=0;j<8;j++)
2247 p[j] = c->vLumFilter[i];
2248 }
2249
247d2c96 2250 for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
d33d485e
AC
2251 int j;
2252 short *p = (short *)&c->vCCoeffsBank[i];
2253 for (j=0;j<8;j++)
2254 p[j] = c->vChrFilter[i];
2255 }
2256#endif
8c266f0c 2257 }
28bf81c9 2258
77a416e8 2259 // Calculate Buffer Sizes so that they won't run out while handling these damn slices
28bf81c9
MN
2260 c->vLumBufSize= c->vLumFilterSize;
2261 c->vChrBufSize= c->vChrFilterSize;
2262 for(i=0; i<dstH; i++)
2263 {
2264 int chrI= i*c->chrDstH / dstH;
6f209cb5 2265 int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1,
e616aa93 2266 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
c4f1e443
MN
2267
2268 nextSlice>>= c->chrSrcVSubSample;
2269 nextSlice<<= c->chrSrcVSubSample;
28bf81c9
MN
2270 if(c->vLumFilterPos[i ] + c->vLumBufSize < nextSlice)
2271 c->vLumBufSize= nextSlice - c->vLumFilterPos[i ];
e616aa93
MN
2272 if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
2273 c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
28bf81c9
MN
2274 }
2275
2276 // allocate pixbufs (we use dynamic allocation because otherwise we would need to
8dfe9094
RD
2277 c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));
2278 c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));
6c7506de 2279 //Note we need at least one pixel more at the end because of the mmx code (just in case someone wanna replace the 4000/8000)
5edb653b 2280 /* align at 16 bytes for AltiVec */
28bf81c9 2281 for(i=0; i<c->vLumBufSize; i++)
8dfe9094 2282 c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_malloc(4000);
28bf81c9 2283 for(i=0; i<c->vChrBufSize; i++)
8dfe9094 2284 c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc(8000);
28bf81c9
MN
2285
2286 //try to avoid drawing green stuff between the right end and the stride end
2287 for(i=0; i<c->vLumBufSize; i++) memset(c->lumPixBuf[i], 0, 4000);
2288 for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);
2289
2290 ASSERT(c->chrDstH <= dstH)
28bf81c9 2291
28bf81c9
MN
2292 if(flags&SWS_PRINT_INFO)
2293 {
2294#ifdef DITHER1XBPP
5521b193
MN
2295 char *dither= " dithered";
2296#else
2297 char *dither= "";
28bf81c9
MN
2298#endif
2299 if(flags&SWS_FAST_BILINEAR)
4cedbe5c 2300 MSG_INFO("SwScaler: FAST_BILINEAR scaler, ");
28bf81c9 2301 else if(flags&SWS_BILINEAR)
4cedbe5c 2302 MSG_INFO("SwScaler: BILINEAR scaler, ");
28bf81c9 2303 else if(flags&SWS_BICUBIC)
4cedbe5c 2304 MSG_INFO("SwScaler: BICUBIC scaler, ");
1e621b18 2305 else if(flags&SWS_X)
4cedbe5c 2306 MSG_INFO("SwScaler: Experimental scaler, ");
ff7ba856 2307 else if(flags&SWS_POINT)
4cedbe5c 2308 MSG_INFO("SwScaler: Nearest Neighbor / POINT scaler, ");
d8863d37 2309 else if(flags&SWS_AREA)
4cedbe5c 2310 MSG_INFO("SwScaler: Area Averageing scaler, ");
81a571a8 2311 else if(flags&SWS_BICUBLIN)
4cedbe5c 2312 MSG_INFO("SwScaler: luma BICUBIC / chroma BILINEAR scaler, ");
a86c461c 2313 else if(flags&SWS_GAUSS)
4cedbe5c 2314 MSG_INFO("SwScaler: Gaussian scaler, ");
a86c461c 2315 else if(flags&SWS_SINC)
4cedbe5c 2316 MSG_INFO("SwScaler: Sinc scaler, ");
a86c461c 2317 else if(flags&SWS_LANCZOS)
4cedbe5c 2318 MSG_INFO("SwScaler: Lanczos scaler, ");
a86c461c 2319 else if(flags&SWS_SPLINE)
4cedbe5c 2320 MSG_INFO("SwScaler: Bicubic spline scaler, ");
28bf81c9 2321 else
4cedbe5c 2322 MSG_INFO("SwScaler: ehh flags invalid?! ");
28bf81c9 2323
e9e12f0e 2324 if(dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)
0d9f3d85 2325 MSG_INFO("from %s to%s %s ",
94c4def2 2326 sws_format_name(srcFormat), dither, sws_format_name(dstFormat));
0d9f3d85
A
2327 else
2328 MSG_INFO("from %s to %s ",
94c4def2 2329 sws_format_name(srcFormat), sws_format_name(dstFormat));
28bf81c9 2330
516b1f82 2331 if(flags & SWS_CPU_CAPS_MMX2)
0d9f3d85 2332 MSG_INFO("using MMX2\n");
516b1f82 2333 else if(flags & SWS_CPU_CAPS_3DNOW)
0d9f3d85 2334 MSG_INFO("using 3DNOW\n");
516b1f82 2335 else if(flags & SWS_CPU_CAPS_MMX)
0d9f3d85 2336 MSG_INFO("using MMX\n");
a2faa401
RD
2337 else if(flags & SWS_CPU_CAPS_ALTIVEC)
2338 MSG_INFO("using AltiVec\n");
2339 else
0d9f3d85 2340 MSG_INFO("using C\n");
28bf81c9
MN
2341 }
2342
516b1f82 2343 if(flags & SWS_PRINT_INFO)
28bf81c9 2344 {
516b1f82 2345 if(flags & SWS_CPU_CAPS_MMX)
28bf81c9
MN
2346 {
2347 if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
0d9f3d85 2348 MSG_V("SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
28bf81c9
MN
2349 else
2350 {
2351 if(c->hLumFilterSize==4)
0d9f3d85 2352 MSG_V("SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");
28bf81c9 2353 else if(c->hLumFilterSize==8)
0d9f3d85 2354 MSG_V("SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");
28bf81c9 2355 else
0d9f3d85 2356 MSG_V("SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");
28bf81c9
MN
2357
2358 if(c->hChrFilterSize==4)
0d9f3d85 2359 MSG_V("SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");
28bf81c9 2360 else if(c->hChrFilterSize==8)
0d9f3d85 2361 MSG_V("SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");
28bf81c9 2362 else
0d9f3d85 2363 MSG_V("SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");
28bf81c9
MN
2364 }
2365 }
2366 else
2367 {
3d6a30d9 2368#if defined(ARCH_X86)
0d9f3d85 2369 MSG_V("SwScaler: using X86-Asm scaler for horizontal scaling\n");
28bf81c9
MN
2370#else
2371 if(flags & SWS_FAST_BILINEAR)
0d9f3d85 2372 MSG_V("SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");
28bf81c9 2373 else
0d9f3d85 2374 MSG_V("SwScaler: using C scaler for horizontal scaling\n");
28bf81c9
MN
2375#endif
2376 }
6c7506de 2377 if(isPlanarYUV(dstFormat))
28bf81c9
MN
2378 {
2379 if(c->vLumFilterSize==1)
516b1f82 2380 MSG_V("SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2381 else
516b1f82 2382 MSG_V("SwScaler: using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9
MN
2383 }
2384 else
2385 {
2386 if(c->vLumFilterSize==1 && c->vChrFilterSize==2)
0d9f3d85 2387 MSG_V("SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
516b1f82 2388 "SwScaler: 2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2389 else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)
516b1f82 2390 MSG_V("SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2391 else
516b1f82 2392 MSG_V("SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9
MN
2393 }
2394
e9e12f0e 2395 if(dstFormat==PIX_FMT_BGR24)
0d9f3d85 2396 MSG_V("SwScaler: using %s YV12->BGR24 Converter\n",
516b1f82 2397 (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));
e9e12f0e 2398 else if(dstFormat==PIX_FMT_RGB32)
516b1f82 2399 MSG_V("SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
e9e12f0e 2400 else if(dstFormat==PIX_FMT_BGR565)
516b1f82 2401 MSG_V("SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
e9e12f0e 2402 else if(dstFormat==PIX_FMT_BGR555)
516b1f82 2403 MSG_V("SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2404
0d9f3d85 2405 MSG_V("SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
28bf81c9 2406 }
516b1f82 2407 if(flags & SWS_PRINT_INFO)
1e621b18 2408 {
0d9f3d85 2409 MSG_DBG2("SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1e621b18 2410 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
0d9f3d85 2411 MSG_DBG2("SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1e621b18
MN
2412 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
2413 }
37079906 2414
516b1f82 2415 c->swScale= getSwsFunc(flags);
28bf81c9
MN
2416 return c;
2417}
2418
2419/**
77a416e8 2420 * swscale warper, so we don't need to export the SwsContext.
fccb9b2b
MN
2421 * assumes planar YUV to be in YUV order instead of YVU
2422 */
2423int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
2424 int srcSliceH, uint8_t* dst[], int dstStride[]){
e63ac25d
JM
2425 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
2426 MSG_ERR("swScaler: slices start in the middle!\n");
2427 return 0;
2428 }
2429 if (c->sliceDir == 0) {
2430 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
2431 }
2432
2433 // copy strides, so they can safely be modified
2434 if (c->sliceDir == 1) {
2435 // slices go from top to bottom
2436 int srcStride2[3]= {srcStride[0], srcStride[1], srcStride[2]};
2437 int dstStride2[3]= {dstStride[0], dstStride[1], dstStride[2]};
2438 return c->swScale(c, src, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);
2439 } else {
2440 // slices go from bottom to top => we flip the image internally
2441 uint8_t* src2[3]= {src[0] + (srcSliceH-1)*srcStride[0],
2442 src[1] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1],
2443 src[2] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2]
2444 };
2445 uint8_t* dst2[3]= {dst[0] + (c->dstH-1)*dstStride[0],
2446 dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],
2447 dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};
2448 int srcStride2[3]= {-srcStride[0], -srcStride[1], -srcStride[2]};
2449 int dstStride2[3]= {-dstStride[0], -dstStride[1], -dstStride[2]};
2450
2451 return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);
2452 }
fccb9b2b
MN
2453}
2454
2455/**
77a416e8 2456 * swscale warper, so we don't need to export the SwsContext
d4e24275 2457 */
e9e12f0e
LA
2458int sws_scale(SwsContext *c, uint8_t* srcParam[], int srcStride[], int srcSliceY,
2459 int srcSliceH, uint8_t* dstParam[], int dstStride[]){
3e499f53
MN
2460 uint8_t *src[3];
2461 uint8_t *dst[3];
e9e12f0e
LA
2462 src[0] = srcParam[0]; src[1] = srcParam[1]; src[2] = srcParam[2];
2463 dst[0] = dstParam[0]; dst[1] = dstParam[1]; dst[2] = dstParam[2];
3e499f53 2464//printf("sws: slice %d %d\n", srcSliceY, srcSliceH);
a4c90ea3 2465
5bf01354 2466 return c->swScale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);
d4e24275 2467}
d4e24275 2468
e21206a8
MN
2469SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
2470 float lumaSharpen, float chromaSharpen,
2471 float chromaHShift, float chromaVShift,
2472 int verbose)
2473{
94c4def2 2474 SwsFilter *filter= av_malloc(sizeof(SwsFilter));
e21206a8
MN
2475
2476 if(lumaGBlur!=0.0){
2477 filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
2478 filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
2479 }else{
2480 filter->lumH= sws_getIdentityVec();
2481 filter->lumV= sws_getIdentityVec();
2482 }
2483
2484 if(chromaGBlur!=0.0){
2485 filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
2486 filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
2487 }else{
2488 filter->chrH= sws_getIdentityVec();
2489 filter->chrV= sws_getIdentityVec();
2490 }
2491
2492 if(chromaSharpen!=0.0){
2e728364
MN
2493 SwsVector *id= sws_getIdentityVec();
2494 sws_scaleVec(filter->chrH, -chromaSharpen);
2495 sws_scaleVec(filter->chrV, -chromaSharpen);
2496 sws_addVec(filter->chrH, id);
2497 sws_addVec(filter->chrV, id);
e21206a8
MN
2498 sws_freeVec(id);
2499 }
2500
2501 if(lumaSharpen!=0.0){
2e728364
MN
2502 SwsVector *id= sws_getIdentityVec();
2503 sws_scaleVec(filter->lumH, -lumaSharpen);
2504 sws_scaleVec(filter->lumV, -lumaSharpen);
2505 sws_addVec(filter->lumH, id);
2506 sws_addVec(filter->lumV, id);
e21206a8
MN
2507 sws_freeVec(id);
2508 }
2509
2510 if(chromaHShift != 0.0)
2511 sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
2512
2513 if(chromaVShift != 0.0)
2514 sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
2515
2516 sws_normalizeVec(filter->chrH, 1.0);
2517 sws_normalizeVec(filter->chrV, 1.0);
2518 sws_normalizeVec(filter->lumH, 1.0);
2519 sws_normalizeVec(filter->lumV, 1.0);
2520
2521 if(verbose) sws_printVec(filter->chrH);
2522 if(verbose) sws_printVec(filter->lumH);
2523
2524 return filter;
2525}
2526
d4e24275 2527/**
28bf81c9
MN
2528 * returns a normalized gaussian curve used to filter stuff
2529 * quality=3 is high quality, lowwer is lowwer quality
2530 */
d4e24275 2531SwsVector *sws_getGaussianVec(double variance, double quality){
28bf81c9
MN
2532 const int length= (int)(variance*quality + 0.5) | 1;
2533 int i;
8dfe9094 2534 double *coeff= av_malloc(length*sizeof(double));
28bf81c9 2535 double middle= (length-1)*0.5;
94c4def2 2536 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2537
2538 vec->coeff= coeff;
2539 vec->length= length;
28bf81c9
MN
2540
2541 for(i=0; i<length; i++)
2542 {
2543 double dist= i-middle;
2544 coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);
2545 }
2546
d4e24275 2547 sws_normalizeVec(vec, 1.0);
c7f822d9
MN
2548
2549 return vec;
28bf81c9
MN
2550}
2551
d4e24275 2552SwsVector *sws_getConstVec(double c, int length){
5521b193 2553 int i;
8dfe9094 2554 double *coeff= av_malloc(length*sizeof(double));
94c4def2 2555 SwsVector *vec= av_malloc(sizeof(SwsVector));
5521b193
MN
2556
2557 vec->coeff= coeff;
2558 vec->length= length;
2559
2560 for(i=0; i<length; i++)
2561 coeff[i]= c;
2562
2563 return vec;
2564}
2565
2566
d4e24275 2567SwsVector *sws_getIdentityVec(void){
2e728364 2568 return sws_getConstVec(1.0, 1);
c7f822d9
MN
2569}
2570
2e728364 2571double sws_dcVec(SwsVector *a){
28bf81c9 2572 int i;
2e728364 2573 double sum=0;
28bf81c9 2574
c7f822d9
MN
2575 for(i=0; i<a->length; i++)
2576 sum+= a->coeff[i];
28bf81c9 2577
2e728364 2578 return sum;
28bf81c9
MN
2579}
2580
d4e24275 2581void sws_scaleVec(SwsVector *a, double scalar){
c7f822d9
MN
2582 int i;
2583
2584 for(i=0; i<a->length; i++)
2585 a->coeff[i]*= scalar;
2586}
2587
2e728364
MN
2588void sws_normalizeVec(SwsVector *a, double height){
2589 sws_scaleVec(a, height/sws_dcVec(a));
2590}
2591
d4e24275 2592static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){
c7f822d9 2593 int length= a->length + b->length - 1;
8dfe9094 2594 double *coeff= av_malloc(length*sizeof(double));
28bf81c9 2595 int i, j;
94c4def2 2596 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2597
2598 vec->coeff= coeff;
2599 vec->length= length;
28bf81c9
MN
2600
2601 for(i=0; i<length; i++) coeff[i]= 0.0;
2602
c7f822d9 2603 for(i=0; i<a->length; i++)
28bf81c9 2604 {
c7f822d9 2605 for(j=0; j<b->length; j++)
28bf81c9 2606 {
c7f822d9 2607 coeff[i+j]+= a->coeff[i]*b->coeff[j];
28bf81c9
MN
2608 }
2609 }
2610
c7f822d9 2611 return vec;
28bf81c9
MN
2612}
2613
d4e24275 2614static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){
6f209cb5 2615 int length= FFMAX(a->length, b->length);
8dfe9094 2616 double *coeff= av_malloc(length*sizeof(double));
28bf81c9 2617 int i;
94c4def2 2618 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2619
2620 vec->coeff= coeff;
2621 vec->length= length;
28bf81c9
MN
2622
2623 for(i=0; i<length; i++) coeff[i]= 0.0;
2624
c7f822d9
MN
2625 for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
2626 for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
2627
2628 return vec;
28bf81c9 2629}
c7f822d9 2630
d4e24275 2631static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){
6f209cb5 2632 int length= FFMAX(a->length, b->length);
8dfe9094 2633 double *coeff= av_malloc(length*sizeof(double));
c7f822d9 2634 int i;
94c4def2 2635 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2636
2637 vec->coeff= coeff;
2638 vec->length= length;
2639
2640 for(i=0; i<length; i++) coeff[i]= 0.0;
2641
2642 for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
2643 for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
2644
2645 return vec;
2646}
2647
2648/* shift left / or right if "shift" is negative */
d4e24275 2649static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){
05749630 2650 int length= a->length + FFABS(shift)*2;
8dfe9094 2651 double *coeff= av_malloc(length*sizeof(double));
ff7ba856 2652 int i;
94c4def2 2653 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2654
2655 vec->coeff= coeff;
2656 vec->length= length;
2657
2658 for(i=0; i<length; i++) coeff[i]= 0.0;
2659
2660 for(i=0; i<a->length; i++)
2661 {
2662 coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
2663 }
2664
2665 return vec;
2666}
2667
d4e24275
MN
2668void sws_shiftVec(SwsVector *a, int shift){
2669 SwsVector *shifted= sws_getShiftedVec(a, shift);
94c4def2 2670 av_free(a->coeff);
5cebb24b
MN
2671 a->coeff= shifted->coeff;
2672 a->length= shifted->length;
94c4def2 2673 av_free(shifted);
5cebb24b
MN
2674}
2675
d4e24275
MN
2676void sws_addVec(SwsVector *a, SwsVector *b){
2677 SwsVector *sum= sws_sumVec(a, b);
94c4def2 2678 av_free(a->coeff);
5cebb24b
MN
2679 a->coeff= sum->coeff;
2680 a->length= sum->length;
94c4def2 2681 av_free(sum);
5cebb24b
MN
2682}
2683
d4e24275
MN
2684void sws_subVec(SwsVector *a, SwsVector *b){
2685 SwsVector *diff= sws_diffVec(a, b);
94c4def2 2686 av_free(a->coeff);
5cebb24b
MN
2687 a->coeff= diff->coeff;
2688 a->length= diff->length;
94c4def2 2689 av_free(diff);
5cebb24b
MN
2690}
2691
d4e24275
MN
2692void sws_convVec(SwsVector *a, SwsVector *b){
2693 SwsVector *conv= sws_getConvVec(a, b);
94c4def2 2694 av_free(a->coeff);
5cebb24b
MN
2695 a->coeff= conv->coeff;
2696 a->length= conv->length;
94c4def2 2697 av_free(conv);
5cebb24b
MN
2698}
2699
d4e24275 2700SwsVector *sws_cloneVec(SwsVector *a){
8dfe9094 2701 double *coeff= av_malloc(a->length*sizeof(double));
5cebb24b 2702 int i;
94c4def2 2703 SwsVector *vec= av_malloc(sizeof(SwsVector));
5cebb24b
MN
2704
2705 vec->coeff= coeff;
2706 vec->length= a->length;
2707
2708 for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];
2709
2710 return vec;
2711}
2712
d4e24275 2713void sws_printVec(SwsVector *a){
c7f822d9
MN
2714 int i;
2715 double max=0;
2716 double min=0;
2717 double range;
2718
2719 for(i=0; i<a->length; i++)
2720 if(a->coeff[i]>max) max= a->coeff[i];
2721
2722 for(i=0; i<a->length; i++)
2723 if(a->coeff[i]<min) min= a->coeff[i];
2724
2725 range= max - min;
2726
2727 for(i=0; i<a->length; i++)
2728 {
2729 int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
0d9f3d85
A
2730 MSG_DBG2("%1.3f ", a->coeff[i]);
2731 for(;x>0; x--) MSG_DBG2(" ");
2732 MSG_DBG2("|\n");
c7f822d9
MN
2733 }
2734}
2735
d4e24275 2736void sws_freeVec(SwsVector *a){
c7f822d9 2737 if(!a) return;
94c4def2 2738 av_free(a->coeff);
c7f822d9
MN
2739 a->coeff=NULL;
2740 a->length=0;
94c4def2 2741 av_free(a);
c7f822d9
MN
2742}
2743
e21206a8
MN
2744void sws_freeFilter(SwsFilter *filter){
2745 if(!filter) return;
2746
2747 if(filter->lumH) sws_freeVec(filter->lumH);
2748 if(filter->lumV) sws_freeVec(filter->lumV);
2749 if(filter->chrH) sws_freeVec(filter->chrH);
2750 if(filter->chrV) sws_freeVec(filter->chrV);
94c4def2 2751 av_free(filter);
e21206a8
MN
2752}
2753
2754
d4e24275 2755void sws_freeContext(SwsContext *c){
c7f822d9 2756 int i;
c7f822d9
MN
2757 if(!c) return;
2758
2759 if(c->lumPixBuf)
2760 {
6c7506de 2761 for(i=0; i<c->vLumBufSize; i++)
c7f822d9 2762 {
94c4def2 2763 av_free(c->lumPixBuf[i]);
c7f822d9
MN
2764 c->lumPixBuf[i]=NULL;
2765 }
94c4def2 2766 av_free(c->lumPixBuf);
c7f822d9
MN
2767 c->lumPixBuf=NULL;
2768 }
2769
2770 if(c->chrPixBuf)
2771 {
6c7506de 2772 for(i=0; i<c->vChrBufSize; i++)
c7f822d9 2773 {
94c4def2 2774 av_free(c->chrPixBuf[i]);
c7f822d9
MN
2775 c->chrPixBuf[i]=NULL;
2776 }
94c4def2 2777 av_free(c->chrPixBuf);
c7f822d9
MN
2778 c->chrPixBuf=NULL;
2779 }
2780
94c4def2 2781 av_free(c->vLumFilter);
c7f822d9 2782 c->vLumFilter = NULL;
94c4def2 2783 av_free(c->vChrFilter);
c7f822d9 2784 c->vChrFilter = NULL;
94c4def2 2785 av_free(c->hLumFilter);
c7f822d9 2786 c->hLumFilter = NULL;
94c4def2 2787 av_free(c->hChrFilter);
c7f822d9 2788 c->hChrFilter = NULL;
d33d485e 2789#ifdef HAVE_ALTIVEC
94c4def2 2790 av_free(c->vYCoeffsBank);
d33d485e 2791 c->vYCoeffsBank = NULL;
94c4def2 2792 av_free(c->vCCoeffsBank);
d33d485e
AC
2793 c->vCCoeffsBank = NULL;
2794#endif
c7f822d9 2795
94c4def2 2796 av_free(c->vLumFilterPos);
c7f822d9 2797 c->vLumFilterPos = NULL;
94c4def2 2798 av_free(c->vChrFilterPos);
c7f822d9 2799 c->vChrFilterPos = NULL;
94c4def2 2800 av_free(c->hLumFilterPos);
c7f822d9 2801 c->hLumFilterPos = NULL;
94c4def2 2802 av_free(c->hChrFilterPos);
c7f822d9
MN
2803 c->hChrFilterPos = NULL;
2804
3d6a30d9 2805#if defined(ARCH_X86)
0ce5275d 2806#ifdef MAP_ANONYMOUS
38d5c282
AJ
2807 if(c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);
2808 if(c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);
2809#else
94c4def2
LA
2810 av_free(c->funnyYCode);
2811 av_free(c->funnyUVCode);
38d5c282
AJ
2812#endif
2813 c->funnyYCode=NULL;
2814 c->funnyUVCode=NULL;
3d6a30d9 2815#endif /* defined(ARCH_X86) */
38d5c282 2816
94c4def2 2817 av_free(c->lumMmx2Filter);
b7dc6f66 2818 c->lumMmx2Filter=NULL;
94c4def2 2819 av_free(c->chrMmx2Filter);
b7dc6f66 2820 c->chrMmx2Filter=NULL;
94c4def2 2821 av_free(c->lumMmx2FilterPos);
b7dc6f66 2822 c->lumMmx2FilterPos=NULL;
94c4def2 2823 av_free(c->chrMmx2FilterPos);
b7dc6f66 2824 c->chrMmx2FilterPos=NULL;
94c4def2 2825 av_free(c->yuvTable);
cf7d1c1a 2826 c->yuvTable=NULL;
b7dc6f66 2827
94c4def2 2828 av_free(c);
c7f822d9
MN
2829}
2830
22e46959
VP
2831/**
2832 * Checks if context is valid or reallocs a new one instead.
2833 * If context is NULL, just calls sws_getContext() to get a new one.
2834 * Otherwise, checks if the parameters are the same already saved in context.
2835 * If that is the case, returns the current context.
2836 * Otherwise, frees context and gets a new one.
2837 *
2838 * Be warned that srcFilter, dstFilter are not checked, they are
2839 * asumed to remain valid.
2840 */
2841struct SwsContext *sws_getCachedContext(struct SwsContext *context,
2842 int srcW, int srcH, int srcFormat,
2843 int dstW, int dstH, int dstFormat, int flags,
2844 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)
2845{
2846 if (context != NULL) {
2847 if ((context->srcW != srcW) || (context->srcH != srcH) ||
2848 (context->srcFormat != srcFormat) ||
2849 (context->dstW != dstW) || (context->dstH != dstH) ||
2850 (context->dstFormat != dstFormat) || (context->flags != flags) ||
2851 (context->param != param))
2852 {
2853 sws_freeContext(context);
2854 context = NULL;
2855 }
2856 }
2857 if (context == NULL) {
2858 return sws_getContext(srcW, srcH, srcFormat,
2859 dstW, dstH, dstFormat, flags,
2860 srcFilter, dstFilter, param);
2861 }
2862 return context;
2863}
2864