check num_reorder_frames for validity
[libav.git] / libswscale / swscale.c
CommitLineData
fe8054c0 1/*
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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_SYS_MMAN_H
65#include <sys/mman.h>
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66#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
67#define MAP_ANONYMOUS MAP_ANON
68#endif
38d5c282 69#endif
d604bab9 70#include "swscale.h"
5427e242 71#include "swscale_internal.h"
94c4def2 72#include "x86_cpu.h"
b2d374c9 73#include "bswap.h"
37079906 74#include "rgb2rgb.h"
94c4def2 75#ifdef USE_FASTMEMCPY
b2d374c9 76#include "libvo/fastmemcpy.h"
94c4def2 77#endif
0d9f3d85 78
541c4eb9 79#undef MOVNTQ
7d7f78b5 80#undef PAVGB
d3f41512 81
783e9cc9 82//#undef HAVE_MMX2
7f56a527 83//#define HAVE_3DNOW
d3f41512 84//#undef HAVE_MMX
783e9cc9 85//#undef ARCH_X86
2ba1bff0 86//#define WORDS_BIGENDIAN
d604bab9 87#define DITHER1XBPP
d3f41512 88
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89#define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit
90
1e621b18 91#define RET 0xC3 //near return opcode for X86
c1b0bfb4 92
28bf81c9 93#ifdef MP_DEBUG
81b7c056 94#define ASSERT(x) assert(x);
28bf81c9 95#else
c1b0bfb4 96#define ASSERT(x) ;
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97#endif
98
99#ifdef M_PI
100#define PI M_PI
101#else
102#define PI 3.14159265358979323846
103#endif
c1b0bfb4 104
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105#define isSupportedIn(x) ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\
106 || (x)==PIX_FMT_RGB32|| (x)==PIX_FMT_BGR24|| (x)==PIX_FMT_BGR565|| (x)==PIX_FMT_BGR555\
a43fb6b3 107 || (x)==PIX_FMT_BGR32|| (x)==PIX_FMT_RGB24|| (x)==PIX_FMT_RGB565|| (x)==PIX_FMT_RGB555\
e9e12f0e 108 || (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P\
4884b9e5 109 || (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\
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110 || (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P)
111#define isSupportedOut(x) ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\
112 || (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P\
cf7d1c1a 113 || isRGB(x) || isBGR(x)\
e9e12f0e 114 || (x)==PIX_FMT_NV12 || (x)==PIX_FMT_NV21\
4884b9e5 115 || (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\
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116 || (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P)
117#define isPacked(x) ((x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422 ||isRGB(x) || isBGR(x))
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118
119#define RGB2YUV_SHIFT 16
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120#define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
121#define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
122#define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
123#define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
124#define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
125#define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
126#define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
127#define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
128#define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
6c7506de 129
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130extern const int32_t Inverse_Table_6_9[8][4];
131
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132/*
133NOTES
d604bab9 134Special versions: fast Y 1:1 scaling (no interpolation in y direction)
31190492 135
783e9cc9 136TODO
d604bab9 137more intelligent missalignment avoidance for the horizontal scaler
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138write special vertical cubic upscale version
139Optimize C code (yv12 / minmax)
ff7ba856 140add support for packed pixel yuv input & output
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141add support for Y8 output
142optimize bgr24 & bgr32
ff7ba856 143add BGR4 output support
1e621b18 144write special BGR->BGR scaler
783e9cc9 145*/
31190492 146
9bde778e 147#if defined(ARCH_X86) && defined (CONFIG_GPL)
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148static uint64_t attribute_used __attribute__((aligned(8))) bF8= 0xF8F8F8F8F8F8F8F8LL;
149static uint64_t attribute_used __attribute__((aligned(8))) bFC= 0xFCFCFCFCFCFCFCFCLL;
d604bab9 150static uint64_t __attribute__((aligned(8))) w10= 0x0010001000100010LL;
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151static uint64_t attribute_used __attribute__((aligned(8))) w02= 0x0002000200020002LL;
152static uint64_t attribute_used __attribute__((aligned(8))) bm00001111=0x00000000FFFFFFFFLL;
153static uint64_t attribute_used __attribute__((aligned(8))) bm00000111=0x0000000000FFFFFFLL;
154static uint64_t attribute_used __attribute__((aligned(8))) bm11111000=0xFFFFFFFFFF000000LL;
155static uint64_t attribute_used __attribute__((aligned(8))) bm01010101=0x00FF00FF00FF00FFLL;
d604bab9 156
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157static volatile uint64_t attribute_used __attribute__((aligned(8))) b5Dither;
158static volatile uint64_t attribute_used __attribute__((aligned(8))) g5Dither;
159static volatile uint64_t attribute_used __attribute__((aligned(8))) g6Dither;
160static volatile uint64_t attribute_used __attribute__((aligned(8))) r5Dither;
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161
162static uint64_t __attribute__((aligned(8))) dither4[2]={
163 0x0103010301030103LL,
164 0x0200020002000200LL,};
165
166static uint64_t __attribute__((aligned(8))) dither8[2]={
167 0x0602060206020602LL,
168 0x0004000400040004LL,};
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169
170static uint64_t __attribute__((aligned(8))) b16Mask= 0x001F001F001F001FLL;
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171static uint64_t attribute_used __attribute__((aligned(8))) g16Mask= 0x07E007E007E007E0LL;
172static uint64_t attribute_used __attribute__((aligned(8))) r16Mask= 0xF800F800F800F800LL;
d604bab9 173static uint64_t __attribute__((aligned(8))) b15Mask= 0x001F001F001F001FLL;
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174static uint64_t attribute_used __attribute__((aligned(8))) g15Mask= 0x03E003E003E003E0LL;
175static uint64_t attribute_used __attribute__((aligned(8))) r15Mask= 0x7C007C007C007C00LL;
d604bab9 176
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177static uint64_t attribute_used __attribute__((aligned(8))) M24A= 0x00FF0000FF0000FFLL;
178static uint64_t attribute_used __attribute__((aligned(8))) M24B= 0xFF0000FF0000FF00LL;
179static uint64_t attribute_used __attribute__((aligned(8))) M24C= 0x0000FF0000FF0000LL;
99d2cb72 180
ac6a2e45 181#ifdef FAST_BGR2YV12
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182static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000000210041000DULL;
183static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000FFEEFFDC0038ULL;
184static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00000038FFD2FFF8ULL;
ac6a2e45 185#else
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186static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000020E540830C8BULL;
187static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000ED0FDAC23831ULL;
188static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00003831D0E6F6EAULL;
69796008 189#endif /* FAST_BGR2YV12 */
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190static const uint64_t bgr2YOffset attribute_used __attribute__((aligned(8))) = 0x1010101010101010ULL;
191static const uint64_t bgr2UVOffset attribute_used __attribute__((aligned(8)))= 0x8080808080808080ULL;
192static const uint64_t w1111 attribute_used __attribute__((aligned(8))) = 0x0001000100010001ULL;
3d6a30d9 193#endif /* defined(ARCH_X86) */
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194
195// clipping helper table for C implementations:
196static unsigned char clip_table[768];
197
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198static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b);
199
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200extern const uint8_t dither_2x2_4[2][8];
201extern const uint8_t dither_2x2_8[2][8];
202extern const uint8_t dither_8x8_32[8][8];
203extern const uint8_t dither_8x8_73[8][8];
204extern const uint8_t dither_8x8_220[8][8];
5cebb24b 205
e9e12f0e 206char *sws_format_name(enum PixelFormat format)
94c4def2 207{
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208 switch (format) {
209 case PIX_FMT_YUV420P:
210 return "yuv420p";
211 case PIX_FMT_YUYV422:
212 return "yuyv422";
213 case PIX_FMT_RGB24:
214 return "rgb24";
215 case PIX_FMT_BGR24:
216 return "bgr24";
217 case PIX_FMT_YUV422P:
218 return "yuv422p";
219 case PIX_FMT_YUV444P:
220 return "yuv444p";
221 case PIX_FMT_RGB32:
222 return "rgb32";
223 case PIX_FMT_YUV410P:
224 return "yuv410p";
225 case PIX_FMT_YUV411P:
226 return "yuv411p";
227 case PIX_FMT_RGB565:
228 return "rgb565";
229 case PIX_FMT_RGB555:
230 return "rgb555";
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231 case PIX_FMT_GRAY16BE:
232 return "gray16be";
233 case PIX_FMT_GRAY16LE:
234 return "gray16le";
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235 case PIX_FMT_GRAY8:
236 return "gray8";
237 case PIX_FMT_MONOWHITE:
238 return "mono white";
239 case PIX_FMT_MONOBLACK:
240 return "mono black";
241 case PIX_FMT_PAL8:
242 return "Palette";
243 case PIX_FMT_YUVJ420P:
244 return "yuvj420p";
245 case PIX_FMT_YUVJ422P:
246 return "yuvj422p";
247 case PIX_FMT_YUVJ444P:
248 return "yuvj444p";
249 case PIX_FMT_XVMC_MPEG2_MC:
250 return "xvmc_mpeg2_mc";
251 case PIX_FMT_XVMC_MPEG2_IDCT:
252 return "xvmc_mpeg2_idct";
253 case PIX_FMT_UYVY422:
254 return "uyvy422";
255 case PIX_FMT_UYYVYY411:
256 return "uyyvyy411";
257 case PIX_FMT_RGB32_1:
258 return "rgb32x";
259 case PIX_FMT_BGR32_1:
260 return "bgr32x";
261 case PIX_FMT_BGR32:
262 return "bgr32";
263 case PIX_FMT_BGR565:
264 return "bgr565";
265 case PIX_FMT_BGR555:
266 return "bgr555";
267 case PIX_FMT_BGR8:
268 return "bgr8";
269 case PIX_FMT_BGR4:
270 return "bgr4";
271 case PIX_FMT_BGR4_BYTE:
272 return "bgr4 byte";
273 case PIX_FMT_RGB8:
274 return "rgb8";
275 case PIX_FMT_RGB4:
276 return "rgb4";
277 case PIX_FMT_RGB4_BYTE:
278 return "rgb4 byte";
279 case PIX_FMT_NV12:
280 return "nv12";
281 case PIX_FMT_NV21:
282 return "nv21";
283 default:
284 return "Unknown format";
285 }
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286}
287
9bde778e 288#if defined(ARCH_X86) && defined (CONFIG_GPL)
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289void in_asm_used_var_warning_killer()
290{
20380eb8 291 volatile int i= bF8+bFC+w10+
5ac80202 292 bm00001111+bm00000111+bm11111000+b16Mask+g16Mask+r16Mask+b15Mask+g15Mask+r15Mask+
6ff0ad6b 293 M24A+M24B+M24C+w02 + b5Dither+g5Dither+r5Dither+g6Dither+dither4[0]+dither8[0]+bm01010101;
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294 if(i) i=0;
295}
296#endif
d604bab9 297
5859233b 298static inline void yuv2yuvXinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
e3d2500f 299 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
5859233b 300 uint8_t *dest, uint8_t *uDest, uint8_t *vDest, int dstW, int chrDstW)
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301{
302 //FIXME Optimize (just quickly writen not opti..)
303 int i;
5859233b 304 for(i=0; i<dstW; i++)
e3d2500f 305 {
379a2036 306 int val=1<<18;
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307 int j;
308 for(j=0; j<lumFilterSize; j++)
309 val += lumSrc[j][i] * lumFilter[j];
310
b2afecbe 311 dest[i]= clip_uint8(val>>19);
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312 }
313
314 if(uDest != NULL)
5859233b 315 for(i=0; i<chrDstW; i++)
e3d2500f 316 {
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317 int u=1<<18;
318 int v=1<<18;
e3d2500f 319 int j;
627690b5 320 for(j=0; j<chrFilterSize; j++)
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321 {
322 u += chrSrc[j][i] * chrFilter[j];
323 v += chrSrc[j][i + 2048] * chrFilter[j];
324 }
325
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326 uDest[i]= clip_uint8(u>>19);
327 vDest[i]= clip_uint8(v>>19);
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328 }
329}
330
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331static inline void yuv2nv12XinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
332 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
333 uint8_t *dest, uint8_t *uDest, int dstW, int chrDstW, int dstFormat)
334{
335 //FIXME Optimize (just quickly writen not opti..)
336 int i;
337 for(i=0; i<dstW; i++)
338 {
339 int val=1<<18;
340 int j;
341 for(j=0; j<lumFilterSize; j++)
342 val += lumSrc[j][i] * lumFilter[j];
343
b2afecbe 344 dest[i]= clip_uint8(val>>19);
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345 }
346
347 if(uDest == NULL)
348 return;
349
e9e12f0e 350 if(dstFormat == PIX_FMT_NV12)
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351 for(i=0; i<chrDstW; i++)
352 {
353 int u=1<<18;
354 int v=1<<18;
355 int j;
356 for(j=0; j<chrFilterSize; j++)
357 {
358 u += chrSrc[j][i] * chrFilter[j];
359 v += chrSrc[j][i + 2048] * chrFilter[j];
360 }
361
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362 uDest[2*i]= clip_uint8(u>>19);
363 uDest[2*i+1]= clip_uint8(v>>19);
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364 }
365 else
366 for(i=0; i<chrDstW; i++)
367 {
368 int u=1<<18;
369 int v=1<<18;
370 int j;
371 for(j=0; j<chrFilterSize; j++)
372 {
373 u += chrSrc[j][i] * chrFilter[j];
374 v += chrSrc[j][i + 2048] * chrFilter[j];
375 }
376
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377 uDest[2*i]= clip_uint8(v>>19);
378 uDest[2*i+1]= clip_uint8(u>>19);
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379 }
380}
46de8b73 381
25593e29 382#define YSCALE_YUV_2_PACKEDX_C(type) \
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383 for(i=0; i<(dstW>>1); i++){\
384 int j;\
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385 int Y1=1<<18;\
386 int Y2=1<<18;\
387 int U=1<<18;\
388 int V=1<<18;\
789237ca 389 type attribute_unused *r, *b, *g;\
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390 const int i2= 2*i;\
391 \
392 for(j=0; j<lumFilterSize; j++)\
393 {\
394 Y1 += lumSrc[j][i2] * lumFilter[j];\
395 Y2 += lumSrc[j][i2+1] * lumFilter[j];\
396 }\
397 for(j=0; j<chrFilterSize; j++)\
398 {\
399 U += chrSrc[j][i] * chrFilter[j];\
400 V += chrSrc[j][i+2048] * chrFilter[j];\
401 }\
402 Y1>>=19;\
403 Y2>>=19;\
404 U >>=19;\
405 V >>=19;\
406 if((Y1|Y2|U|V)&256)\
407 {\
408 if(Y1>255) Y1=255;\
409 else if(Y1<0)Y1=0;\
410 if(Y2>255) Y2=255;\
411 else if(Y2<0)Y2=0;\
412 if(U>255) U=255;\
413 else if(U<0) U=0;\
414 if(V>255) V=255;\
415 else if(V<0) V=0;\
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416 }
417
418#define YSCALE_YUV_2_RGBX_C(type) \
25593e29 419 YSCALE_YUV_2_PACKEDX_C(type)\
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420 r = (type *)c->table_rV[V];\
421 g = (type *)(c->table_gU[U] + c->table_gV[V]);\
422 b = (type *)c->table_bU[U];\
cf7d1c1a 423
25593e29 424#define YSCALE_YUV_2_PACKED2_C \
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425 for(i=0; i<(dstW>>1); i++){\
426 const int i2= 2*i;\
427 int Y1= (buf0[i2 ]*yalpha1+buf1[i2 ]*yalpha)>>19;\
428 int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>19;\
429 int U= (uvbuf0[i ]*uvalpha1+uvbuf1[i ]*uvalpha)>>19;\
430 int V= (uvbuf0[i+2048]*uvalpha1+uvbuf1[i+2048]*uvalpha)>>19;\
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431
432#define YSCALE_YUV_2_RGB2_C(type) \
25593e29 433 YSCALE_YUV_2_PACKED2_C\
cf7d1c1a 434 type *r, *b, *g;\
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435 r = (type *)c->table_rV[V];\
436 g = (type *)(c->table_gU[U] + c->table_gV[V]);\
437 b = (type *)c->table_bU[U];\
cf7d1c1a 438
25593e29 439#define YSCALE_YUV_2_PACKED1_C \
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440 for(i=0; i<(dstW>>1); i++){\
441 const int i2= 2*i;\
442 int Y1= buf0[i2 ]>>7;\
443 int Y2= buf0[i2+1]>>7;\
444 int U= (uvbuf1[i ])>>7;\
445 int V= (uvbuf1[i+2048])>>7;\
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446
447#define YSCALE_YUV_2_RGB1_C(type) \
25593e29 448 YSCALE_YUV_2_PACKED1_C\
cf7d1c1a 449 type *r, *b, *g;\
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450 r = (type *)c->table_rV[V];\
451 g = (type *)(c->table_gU[U] + c->table_gV[V]);\
452 b = (type *)c->table_bU[U];\
cf7d1c1a 453
25593e29 454#define YSCALE_YUV_2_PACKED1B_C \
cf7d1c1a
MN
455 for(i=0; i<(dstW>>1); i++){\
456 const int i2= 2*i;\
457 int Y1= buf0[i2 ]>>7;\
458 int Y2= buf0[i2+1]>>7;\
459 int U= (uvbuf0[i ] + uvbuf1[i ])>>8;\
460 int V= (uvbuf0[i+2048] + uvbuf1[i+2048])>>8;\
46de8b73
MN
461
462#define YSCALE_YUV_2_RGB1B_C(type) \
25593e29 463 YSCALE_YUV_2_PACKED1B_C\
cf7d1c1a 464 type *r, *b, *g;\
628bc5e8
LA
465 r = (type *)c->table_rV[V];\
466 g = (type *)(c->table_gU[U] + c->table_gV[V]);\
467 b = (type *)c->table_bU[U];\
cf7d1c1a 468
46de8b73 469#define YSCALE_YUV_2_ANYRGB_C(func, func2)\
cf7d1c1a
MN
470 switch(c->dstFormat)\
471 {\
e9e12f0e
LA
472 case PIX_FMT_RGB32:\
473 case PIX_FMT_BGR32:\
cf7d1c1a
MN
474 func(uint32_t)\
475 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\
476 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\
477 } \
478 break;\
e9e12f0e 479 case PIX_FMT_RGB24:\
cf7d1c1a
MN
480 func(uint8_t)\
481 ((uint8_t*)dest)[0]= r[Y1];\
482 ((uint8_t*)dest)[1]= g[Y1];\
483 ((uint8_t*)dest)[2]= b[Y1];\
484 ((uint8_t*)dest)[3]= r[Y2];\
485 ((uint8_t*)dest)[4]= g[Y2];\
486 ((uint8_t*)dest)[5]= b[Y2];\
ae4cffd9 487 dest+=6;\
cf7d1c1a
MN
488 }\
489 break;\
e9e12f0e 490 case PIX_FMT_BGR24:\
cf7d1c1a
MN
491 func(uint8_t)\
492 ((uint8_t*)dest)[0]= b[Y1];\
493 ((uint8_t*)dest)[1]= g[Y1];\
494 ((uint8_t*)dest)[2]= r[Y1];\
495 ((uint8_t*)dest)[3]= b[Y2];\
496 ((uint8_t*)dest)[4]= g[Y2];\
497 ((uint8_t*)dest)[5]= r[Y2];\
ae4cffd9 498 dest+=6;\
cf7d1c1a
MN
499 }\
500 break;\
e9e12f0e
LA
501 case PIX_FMT_RGB565:\
502 case PIX_FMT_BGR565:\
cf7d1c1a
MN
503 {\
504 const int dr1= dither_2x2_8[y&1 ][0];\
505 const int dg1= dither_2x2_4[y&1 ][0];\
506 const int db1= dither_2x2_8[(y&1)^1][0];\
507 const int dr2= dither_2x2_8[y&1 ][1];\
508 const int dg2= dither_2x2_4[y&1 ][1];\
509 const int db2= dither_2x2_8[(y&1)^1][1];\
510 func(uint16_t)\
511 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
512 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
513 }\
514 }\
515 break;\
e9e12f0e
LA
516 case PIX_FMT_RGB555:\
517 case PIX_FMT_BGR555:\
cf7d1c1a
MN
518 {\
519 const int dr1= dither_2x2_8[y&1 ][0];\
520 const int dg1= dither_2x2_8[y&1 ][1];\
521 const int db1= dither_2x2_8[(y&1)^1][0];\
522 const int dr2= dither_2x2_8[y&1 ][1];\
523 const int dg2= dither_2x2_8[y&1 ][0];\
524 const int db2= dither_2x2_8[(y&1)^1][1];\
525 func(uint16_t)\
526 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
527 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
528 }\
529 }\
530 break;\
e9e12f0e
LA
531 case PIX_FMT_RGB8:\
532 case PIX_FMT_BGR8:\
cf7d1c1a
MN
533 {\
534 const uint8_t * const d64= dither_8x8_73[y&7];\
535 const uint8_t * const d32= dither_8x8_32[y&7];\
536 func(uint8_t)\
537 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];\
538 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];\
539 }\
540 }\
541 break;\
e9e12f0e
LA
542 case PIX_FMT_RGB4:\
543 case PIX_FMT_BGR4:\
cf7d1c1a
MN
544 {\
545 const uint8_t * const d64= dither_8x8_73 [y&7];\
546 const uint8_t * const d128=dither_8x8_220[y&7];\
547 func(uint8_t)\
799fd467 548 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]\
f17457ac
MN
549 + ((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);\
550 }\
551 }\
552 break;\
e9e12f0e
LA
553 case PIX_FMT_RGB4_BYTE:\
554 case PIX_FMT_BGR4_BYTE:\
f17457ac
MN
555 {\
556 const uint8_t * const d64= dither_8x8_73 [y&7];\
557 const uint8_t * const d128=dither_8x8_220[y&7];\
558 func(uint8_t)\
cf7d1c1a
MN
559 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];\
560 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];\
561 }\
562 }\
563 break;\
e9e12f0e 564 case PIX_FMT_MONOBLACK:\
cf7d1c1a
MN
565 {\
566 const uint8_t * const d128=dither_8x8_220[y&7];\
567 uint8_t *g= c->table_gU[128] + c->table_gV[128];\
568 for(i=0; i<dstW-7; i+=8){\
569 int acc;\
570 acc = g[((buf0[i ]*yalpha1+buf1[i ]*yalpha)>>19) + d128[0]];\
571 acc+= acc + g[((buf0[i+1]*yalpha1+buf1[i+1]*yalpha)>>19) + d128[1]];\
572 acc+= acc + g[((buf0[i+2]*yalpha1+buf1[i+2]*yalpha)>>19) + d128[2]];\
573 acc+= acc + g[((buf0[i+3]*yalpha1+buf1[i+3]*yalpha)>>19) + d128[3]];\
574 acc+= acc + g[((buf0[i+4]*yalpha1+buf1[i+4]*yalpha)>>19) + d128[4]];\
575 acc+= acc + g[((buf0[i+5]*yalpha1+buf1[i+5]*yalpha)>>19) + d128[5]];\
576 acc+= acc + g[((buf0[i+6]*yalpha1+buf1[i+6]*yalpha)>>19) + d128[6]];\
577 acc+= acc + g[((buf0[i+7]*yalpha1+buf1[i+7]*yalpha)>>19) + d128[7]];\
578 ((uint8_t*)dest)[0]= acc;\
ae4cffd9 579 dest++;\
cf7d1c1a
MN
580 }\
581\
582/*\
583((uint8_t*)dest)-= dstW>>4;\
584{\
585 int acc=0;\
586 int left=0;\
587 static int top[1024];\
588 static int last_new[1024][1024];\
589 static int last_in3[1024][1024];\
590 static int drift[1024][1024];\
591 int topLeft=0;\
592 int shift=0;\
593 int count=0;\
594 const uint8_t * const d128=dither_8x8_220[y&7];\
595 int error_new=0;\
596 int error_in3=0;\
597 int f=0;\
598 \
599 for(i=dstW>>1; i<dstW; i++){\
600 int in= ((buf0[i ]*yalpha1+buf1[i ]*yalpha)>>19);\
601 int in2 = (76309 * (in - 16) + 32768) >> 16;\
602 int in3 = (in2 < 0) ? 0 : ((in2 > 255) ? 255 : in2);\
603 int old= (left*7 + topLeft + top[i]*5 + top[i+1]*3)/20 + in3\
604 + (last_new[y][i] - in3)*f/256;\
605 int new= old> 128 ? 255 : 0;\
606\
05749630
DB
607 error_new+= FFABS(last_new[y][i] - new);\
608 error_in3+= FFABS(last_in3[y][i] - in3);\
cf7d1c1a
MN
609 f= error_new - error_in3*4;\
610 if(f<0) f=0;\
611 if(f>256) f=256;\
612\
613 topLeft= top[i];\
614 left= top[i]= old - new;\
615 last_new[y][i]= new;\
616 last_in3[y][i]= in3;\
617\
618 acc+= acc + (new&1);\
619 if((i&7)==6){\
620 ((uint8_t*)dest)[0]= acc;\
621 ((uint8_t*)dest)++;\
622 }\
623 }\
624}\
625*/\
626 }\
627 break;\
e9e12f0e 628 case PIX_FMT_YUYV422:\
46de8b73
MN
629 func2\
630 ((uint8_t*)dest)[2*i2+0]= Y1;\
631 ((uint8_t*)dest)[2*i2+1]= U;\
632 ((uint8_t*)dest)[2*i2+2]= Y2;\
633 ((uint8_t*)dest)[2*i2+3]= V;\
634 } \
635 break;\
e9e12f0e 636 case PIX_FMT_UYVY422:\
caeaabe7
AB
637 func2\
638 ((uint8_t*)dest)[2*i2+0]= U;\
639 ((uint8_t*)dest)[2*i2+1]= Y1;\
640 ((uint8_t*)dest)[2*i2+2]= V;\
641 ((uint8_t*)dest)[2*i2+3]= Y2;\
642 } \
643 break;\
cf7d1c1a
MN
644 }\
645
646
25593e29 647static inline void yuv2packedXinC(SwsContext *c, int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
e3d2500f 648 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
cf7d1c1a 649 uint8_t *dest, int dstW, int y)
e3d2500f 650{
cf7d1c1a
MN
651 int i;
652 switch(c->dstFormat)
e3d2500f 653 {
e9e12f0e
LA
654 case PIX_FMT_BGR32:
655 case PIX_FMT_RGB32:
cf7d1c1a
MN
656 YSCALE_YUV_2_RGBX_C(uint32_t)
657 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];
658 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];
e3d2500f 659 }
cf7d1c1a 660 break;
e9e12f0e 661 case PIX_FMT_RGB24:
cf7d1c1a
MN
662 YSCALE_YUV_2_RGBX_C(uint8_t)
663 ((uint8_t*)dest)[0]= r[Y1];
664 ((uint8_t*)dest)[1]= g[Y1];
665 ((uint8_t*)dest)[2]= b[Y1];
666 ((uint8_t*)dest)[3]= r[Y2];
667 ((uint8_t*)dest)[4]= g[Y2];
668 ((uint8_t*)dest)[5]= b[Y2];
ae4cffd9 669 dest+=6;
cf7d1c1a
MN
670 }
671 break;
e9e12f0e 672 case PIX_FMT_BGR24:
cf7d1c1a
MN
673 YSCALE_YUV_2_RGBX_C(uint8_t)
674 ((uint8_t*)dest)[0]= b[Y1];
675 ((uint8_t*)dest)[1]= g[Y1];
676 ((uint8_t*)dest)[2]= r[Y1];
677 ((uint8_t*)dest)[3]= b[Y2];
678 ((uint8_t*)dest)[4]= g[Y2];
679 ((uint8_t*)dest)[5]= r[Y2];
ae4cffd9 680 dest+=6;
cf7d1c1a
MN
681 }
682 break;
e9e12f0e
LA
683 case PIX_FMT_RGB565:
684 case PIX_FMT_BGR565:
cf7d1c1a
MN
685 {
686 const int dr1= dither_2x2_8[y&1 ][0];
687 const int dg1= dither_2x2_4[y&1 ][0];
688 const int db1= dither_2x2_8[(y&1)^1][0];
689 const int dr2= dither_2x2_8[y&1 ][1];
690 const int dg2= dither_2x2_4[y&1 ][1];
691 const int db2= dither_2x2_8[(y&1)^1][1];
692 YSCALE_YUV_2_RGBX_C(uint16_t)
693 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];
694 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];
e3d2500f 695 }
e3d2500f 696 }
cf7d1c1a 697 break;
e9e12f0e
LA
698 case PIX_FMT_RGB555:
699 case PIX_FMT_BGR555:
cf7d1c1a
MN
700 {
701 const int dr1= dither_2x2_8[y&1 ][0];
702 const int dg1= dither_2x2_8[y&1 ][1];
703 const int db1= dither_2x2_8[(y&1)^1][0];
704 const int dr2= dither_2x2_8[y&1 ][1];
705 const int dg2= dither_2x2_8[y&1 ][0];
706 const int db2= dither_2x2_8[(y&1)^1][1];
707 YSCALE_YUV_2_RGBX_C(uint16_t)
708 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];
709 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];
e3d2500f 710 }
cf7d1c1a
MN
711 }
712 break;
e9e12f0e
LA
713 case PIX_FMT_RGB8:
714 case PIX_FMT_BGR8:
cf7d1c1a
MN
715 {
716 const uint8_t * const d64= dither_8x8_73[y&7];
717 const uint8_t * const d32= dither_8x8_32[y&7];
718 YSCALE_YUV_2_RGBX_C(uint8_t)
719 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];
720 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];
e3d2500f 721 }
e3d2500f 722 }
cf7d1c1a 723 break;
e9e12f0e
LA
724 case PIX_FMT_RGB4:
725 case PIX_FMT_BGR4:
cf7d1c1a
MN
726 {
727 const uint8_t * const d64= dither_8x8_73 [y&7];
728 const uint8_t * const d128=dither_8x8_220[y&7];
729 YSCALE_YUV_2_RGBX_C(uint8_t)
799fd467 730 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]
f17457ac
MN
731 +((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);
732 }
733 }
734 break;
e9e12f0e
LA
735 case PIX_FMT_RGB4_BYTE:
736 case PIX_FMT_BGR4_BYTE:
f17457ac
MN
737 {
738 const uint8_t * const d64= dither_8x8_73 [y&7];
739 const uint8_t * const d128=dither_8x8_220[y&7];
740 YSCALE_YUV_2_RGBX_C(uint8_t)
cf7d1c1a
MN
741 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];
742 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];
e3d2500f 743 }
cf7d1c1a
MN
744 }
745 break;
e9e12f0e 746 case PIX_FMT_MONOBLACK:
cf7d1c1a
MN
747 {
748 const uint8_t * const d128=dither_8x8_220[y&7];
749 uint8_t *g= c->table_gU[128] + c->table_gV[128];
750 int acc=0;
751 for(i=0; i<dstW-1; i+=2){
752 int j;
379a2036
MN
753 int Y1=1<<18;
754 int Y2=1<<18;
cf7d1c1a
MN
755
756 for(j=0; j<lumFilterSize; j++)
757 {
758 Y1 += lumSrc[j][i] * lumFilter[j];
759 Y2 += lumSrc[j][i+1] * lumFilter[j];
760 }
761 Y1>>=19;
762 Y2>>=19;
763 if((Y1|Y2)&256)
764 {
765 if(Y1>255) Y1=255;
766 else if(Y1<0)Y1=0;
767 if(Y2>255) Y2=255;
768 else if(Y2<0)Y2=0;
769 }
770 acc+= acc + g[Y1+d128[(i+0)&7]];
771 acc+= acc + g[Y2+d128[(i+1)&7]];
772 if((i&7)==6){
773 ((uint8_t*)dest)[0]= acc;
ae4cffd9 774 dest++;
cf7d1c1a 775 }
e3d2500f 776 }
e3d2500f 777 }
cf7d1c1a 778 break;
e9e12f0e 779 case PIX_FMT_YUYV422:
25593e29 780 YSCALE_YUV_2_PACKEDX_C(void)
46de8b73
MN
781 ((uint8_t*)dest)[2*i2+0]= Y1;
782 ((uint8_t*)dest)[2*i2+1]= U;
783 ((uint8_t*)dest)[2*i2+2]= Y2;
784 ((uint8_t*)dest)[2*i2+3]= V;
785 }
786 break;
e9e12f0e 787 case PIX_FMT_UYVY422:
caeaabe7
AB
788 YSCALE_YUV_2_PACKEDX_C(void)
789 ((uint8_t*)dest)[2*i2+0]= U;
790 ((uint8_t*)dest)[2*i2+1]= Y1;
791 ((uint8_t*)dest)[2*i2+2]= V;
792 ((uint8_t*)dest)[2*i2+3]= Y2;
793 }
794 break;
e3d2500f
MN
795 }
796}
797
798
7630f2e0
MN
799//Note: we have C, X86, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
800//Plain C versions
9bde778e 801#if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT) || !defined(CONFIG_GPL)
726a959a
MN
802#define COMPILE_C
803#endif
804
a2faa401 805#ifdef ARCH_POWERPC
9bde778e 806#if (defined (HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
a2faa401
RD
807#define COMPILE_ALTIVEC
808#endif //HAVE_ALTIVEC
809#endif //ARCH_POWERPC
810
3d6a30d9 811#if defined(ARCH_X86)
726a959a 812
9bde778e 813#if ((defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
726a959a
MN
814#define COMPILE_MMX
815#endif
816
9bde778e 817#if (defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
726a959a
MN
818#define COMPILE_MMX2
819#endif
820
9bde778e 821#if ((defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
726a959a
MN
822#define COMPILE_3DNOW
823#endif
6e1c66bc 824#endif //ARCH_X86 || ARCH_X86_64
726a959a
MN
825
826#undef HAVE_MMX
827#undef HAVE_MMX2
828#undef HAVE_3DNOW
726a959a
MN
829
830#ifdef COMPILE_C
7630f2e0
MN
831#undef HAVE_MMX
832#undef HAVE_MMX2
833#undef HAVE_3DNOW
a2faa401 834#undef HAVE_ALTIVEC
7630f2e0
MN
835#define RENAME(a) a ## _C
836#include "swscale_template.c"
726a959a 837#endif
397c035e 838
a2faa401
RD
839#ifdef ARCH_POWERPC
840#ifdef COMPILE_ALTIVEC
841#undef RENAME
842#define HAVE_ALTIVEC
843#define RENAME(a) a ## _altivec
844#include "swscale_template.c"
845#endif
846#endif //ARCH_POWERPC
847
3d6a30d9 848#if defined(ARCH_X86)
397c035e 849
7630f2e0
MN
850//X86 versions
851/*
852#undef RENAME
853#undef HAVE_MMX
854#undef HAVE_MMX2
855#undef HAVE_3DNOW
856#define ARCH_X86
857#define RENAME(a) a ## _X86
858#include "swscale_template.c"
1faf0867 859*/
7630f2e0 860//MMX versions
726a959a 861#ifdef COMPILE_MMX
7630f2e0
MN
862#undef RENAME
863#define HAVE_MMX
864#undef HAVE_MMX2
865#undef HAVE_3DNOW
7630f2e0
MN
866#define RENAME(a) a ## _MMX
867#include "swscale_template.c"
726a959a 868#endif
7630f2e0
MN
869
870//MMX2 versions
726a959a 871#ifdef COMPILE_MMX2
7630f2e0
MN
872#undef RENAME
873#define HAVE_MMX
874#define HAVE_MMX2
875#undef HAVE_3DNOW
7630f2e0
MN
876#define RENAME(a) a ## _MMX2
877#include "swscale_template.c"
726a959a 878#endif
7630f2e0
MN
879
880//3DNOW versions
726a959a 881#ifdef COMPILE_3DNOW
7630f2e0
MN
882#undef RENAME
883#define HAVE_MMX
884#undef HAVE_MMX2
885#define HAVE_3DNOW
7630f2e0
MN
886#define RENAME(a) a ## _3DNow
887#include "swscale_template.c"
726a959a 888#endif
7630f2e0 889
6e1c66bc 890#endif //ARCH_X86 || ARCH_X86_64
7630f2e0 891
77a416e8 892// minor note: the HAVE_xyz is messed up after that line so don't use it
d604bab9 893
a86c461c
MN
894static double getSplineCoeff(double a, double b, double c, double d, double dist)
895{
896// printf("%f %f %f %f %f\n", a,b,c,d,dist);
897 if(dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
898 else return getSplineCoeff( 0.0,
899 b+ 2.0*c + 3.0*d,
900 c + 3.0*d,
901 -b- 3.0*c - 6.0*d,
902 dist-1.0);
903}
6c7506de 904
bca11e75 905static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
c7f822d9 906 int srcW, int dstW, int filterAlign, int one, int flags,
66d1cdb6 907 SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
28bf81c9
MN
908{
909 int i;
c7f822d9
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910 int filterSize;
911 int filter2Size;
912 int minFilterSize;
913 double *filter=NULL;
914 double *filter2=NULL;
3d6a30d9 915#if defined(ARCH_X86)
516b1f82 916 if(flags & SWS_CPU_CAPS_MMX)
28bf81c9 917 asm volatile("emms\n\t"::: "memory"); //FIXME this shouldnt be required but it IS (even for non mmx versions)
726a959a 918#endif
31190492 919
adeaecb9 920 // Note the +1 is for the MMXscaler which reads over the end
8dfe9094 921 *filterPos = av_malloc((dstW+1)*sizeof(int16_t));
6c7506de 922
05749630 923 if(FFABS(xInc - 0x10000) <10) // unscaled
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924 {
925 int i;
c7f822d9 926 filterSize= 1;
8dfe9094 927 filter= av_malloc(dstW*sizeof(double)*filterSize);
c7f822d9 928 for(i=0; i<dstW*filterSize; i++) filter[i]=0;
28bf81c9
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929
930 for(i=0; i<dstW; i++)
931 {
c7f822d9
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932 filter[i*filterSize]=1;
933 (*filterPos)[i]=i;
28bf81c9
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934 }
935
936 }
ff7ba856
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937 else if(flags&SWS_POINT) // lame looking point sampling mode
938 {
939 int i;
940 int xDstInSrc;
941 filterSize= 1;
8dfe9094 942 filter= av_malloc(dstW*sizeof(double)*filterSize);
ff7ba856
MN
943
944 xDstInSrc= xInc/2 - 0x8000;
945 for(i=0; i<dstW; i++)
946 {
8a01d20c 947 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
ff7ba856
MN
948
949 (*filterPos)[i]= xx;
950 filter[i]= 1.0;
951 xDstInSrc+= xInc;
952 }
953 }
a86c461c 954 else if((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale
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955 {
956 int i;
957 int xDstInSrc;
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958 if (flags&SWS_BICUBIC) filterSize= 4;
959 else if(flags&SWS_X ) filterSize= 4;
d8863d37 960 else filterSize= 2; // SWS_BILINEAR / SWS_AREA
8dfe9094 961 filter= av_malloc(dstW*sizeof(double)*filterSize);
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962
963 xDstInSrc= xInc/2 - 0x8000;
964 for(i=0; i<dstW; i++)
965 {
8a01d20c 966 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
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967 int j;
968
c7f822d9 969 (*filterPos)[i]= xx;
d8863d37 970 //Bilinear upscale / linear interpolate / Area averaging
c7f822d9 971 for(j=0; j<filterSize; j++)
28bf81c9 972 {
05749630 973 double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);
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974 double coeff= 1.0 - d;
975 if(coeff<0) coeff=0;
c7f822d9 976 filter[i*filterSize + j]= coeff;
28bf81c9
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977 xx++;
978 }
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979 xDstInSrc+= xInc;
980 }
981 }
a86c461c 982 else
28bf81c9 983 {
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984 double xDstInSrc;
985 double sizeFactor, filterSizeInSrc;
986 const double xInc1= (double)xInc / (double)(1<<16);
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987
988 if (flags&SWS_BICUBIC) sizeFactor= 4.0;
989 else if(flags&SWS_X) sizeFactor= 8.0;
990 else if(flags&SWS_AREA) sizeFactor= 1.0; //downscale only, for upscale it is bilinear
991 else if(flags&SWS_GAUSS) sizeFactor= 8.0; // infinite ;)
66d1cdb6 992 else if(flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;
93768378 993 else if(flags&SWS_SINC) sizeFactor= 20.0; // infinite ;)
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994 else if(flags&SWS_SPLINE) sizeFactor= 20.0; // infinite ;)
995 else if(flags&SWS_BILINEAR) sizeFactor= 2.0;
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996 else {
997 sizeFactor= 0.0; //GCC warning killer
998 ASSERT(0)
999 }
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1000
1001 if(xInc1 <= 1.0) filterSizeInSrc= sizeFactor; // upscale
1002 else filterSizeInSrc= sizeFactor*srcW / (double)dstW;
81b7c056 1003
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1004 filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible
1005 if(filterSize > srcW-2) filterSize=srcW-2;
28bf81c9 1006
8dfe9094 1007 filter= av_malloc(dstW*sizeof(double)*filterSize);
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1008
1009 xDstInSrc= xInc1 / 2.0 - 0.5;
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1010 for(i=0; i<dstW; i++)
1011 {
a86c461c 1012 int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);
28bf81c9 1013 int j;
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MN
1014 (*filterPos)[i]= xx;
1015 for(j=0; j<filterSize; j++)
28bf81c9 1016 {
05749630 1017 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;
28bf81c9 1018 double coeff;
a86c461c 1019 if(flags & SWS_BICUBIC)
28bf81c9 1020 {
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1021 double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;
1022 double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;
1023
1024 if(d<1.0)
1025 coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;
28bf81c9 1026 else if(d<2.0)
66d1cdb6 1027 coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;
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MN
1028 else
1029 coeff=0.0;
1030 }
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MN
1031/* else if(flags & SWS_X)
1032 {
1033 double p= param ? param*0.01 : 0.3;
1034 coeff = d ? sin(d*PI)/(d*PI) : 1.0;
1035 coeff*= pow(2.0, - p*d*d);
1036 }*/
1037 else if(flags & SWS_X)
1038 {
66d1cdb6 1039 double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
a86c461c
MN
1040
1041 if(d<1.0)
1042 coeff = cos(d*PI);
1043 else
1044 coeff=-1.0;
1045 if(coeff<0.0) coeff= -pow(-coeff, A);
1046 else coeff= pow( coeff, A);
1047 coeff= coeff*0.5 + 0.5;
1048 }
d8863d37 1049 else if(flags & SWS_AREA)
28bf81c9 1050 {
a86c461c 1051 double srcPixelSize= 1.0/xInc1;
d8863d37
MN
1052 if(d + srcPixelSize/2 < 0.5) coeff= 1.0;
1053 else if(d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;
1054 else coeff=0.0;
1055 }
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MN
1056 else if(flags & SWS_GAUSS)
1057 {
66d1cdb6 1058 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
a86c461c
MN
1059 coeff = pow(2.0, - p*d*d);
1060 }
1061 else if(flags & SWS_SINC)
1062 {
1063 coeff = d ? sin(d*PI)/(d*PI) : 1.0;
1064 }
1065 else if(flags & SWS_LANCZOS)
1066 {
66d1cdb6 1067 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
a86c461c
MN
1068 coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;
1069 if(d>p) coeff=0;
1070 }
1071 else if(flags & SWS_BILINEAR)
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MN
1072 {
1073 coeff= 1.0 - d;
1074 if(coeff<0) coeff=0;
1075 }
a86c461c
MN
1076 else if(flags & SWS_SPLINE)
1077 {
1078 double p=-2.196152422706632;
1079 coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);
1080 }
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MN
1081 else {
1082 coeff= 0.0; //GCC warning killer
1083 ASSERT(0)
1084 }
a86c461c 1085
c7f822d9 1086 filter[i*filterSize + j]= coeff;
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MN
1087 xx++;
1088 }
a86c461c 1089 xDstInSrc+= xInc1;
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MN
1090 }
1091 }
1092
c7f822d9 1093 /* apply src & dst Filter to filter -> filter2
94c4def2 1094 av_free(filter);
c7f822d9 1095 */
81b7c056 1096 ASSERT(filterSize>0)
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MN
1097 filter2Size= filterSize;
1098 if(srcFilter) filter2Size+= srcFilter->length - 1;
1099 if(dstFilter) filter2Size+= dstFilter->length - 1;
81b7c056 1100 ASSERT(filter2Size>0)
8dfe9094 1101 filter2= av_malloc(filter2Size*dstW*sizeof(double));
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MN
1102
1103 for(i=0; i<dstW; i++)
1104 {
1105 int j;
1106 SwsVector scaleFilter;
1107 SwsVector *outVec;
1108
1109 scaleFilter.coeff= filter + i*filterSize;
1110 scaleFilter.length= filterSize;
1111
d4e24275 1112 if(srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);
c7f822d9
MN
1113 else outVec= &scaleFilter;
1114
1115 ASSERT(outVec->length == filter2Size)
1116 //FIXME dstFilter
1117
1118 for(j=0; j<outVec->length; j++)
1119 {
1120 filter2[i*filter2Size + j]= outVec->coeff[j];
1121 }
1122
1123 (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
1124
d4e24275 1125 if(outVec != &scaleFilter) sws_freeVec(outVec);
c7f822d9 1126 }
94c4def2 1127 av_free(filter); filter=NULL;
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MN
1128
1129 /* try to reduce the filter-size (step1 find size and shift left) */
1130 // Assume its near normalized (*0.5 or *2.0 is ok but * 0.001 is not)
1131 minFilterSize= 0;
1132 for(i=dstW-1; i>=0; i--)
1133 {
1134 int min= filter2Size;
1135 int j;
1136 double cutOff=0.0;
1137
1138 /* get rid off near zero elements on the left by shifting left */
1139 for(j=0; j<filter2Size; j++)
1140 {
1141 int k;
05749630 1142 cutOff += FFABS(filter2[i*filter2Size]);
c7f822d9
MN
1143
1144 if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
1145
77a416e8 1146 /* preserve Monotonicity because the core can't handle the filter otherwise */
c7f822d9
MN
1147 if(i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
1148
1149 // Move filter coeffs left
1150 for(k=1; k<filter2Size; k++)
1151 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
1152 filter2[i*filter2Size + k - 1]= 0.0;
1153 (*filterPos)[i]++;
1154 }
1155
1156 cutOff=0.0;
1157 /* count near zeros on the right */
1158 for(j=filter2Size-1; j>0; j--)
1159 {
05749630 1160 cutOff += FFABS(filter2[i*filter2Size + j]);
c7f822d9
MN
1161
1162 if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
1163 min--;
1164 }
1165
1166 if(min>minFilterSize) minFilterSize= min;
1167 }
1168
8c266f0c
RD
1169 if (flags & SWS_CPU_CAPS_ALTIVEC) {
1170 // we can handle the special case 4,
1171 // so we don't want to go to the full 8
1172 if (minFilterSize < 5)
1173 filterAlign = 4;
1174
1175 // we really don't want to waste our time
1176 // doing useless computation, so fall-back on
1177 // the scalar C code for very small filter.
1178 // vectorizing is worth it only if you have
1179 // decent-sized vector.
1180 if (minFilterSize < 3)
1181 filterAlign = 1;
1182 }
1183
bca11e75
MN
1184 if (flags & SWS_CPU_CAPS_MMX) {
1185 // special case for unscaled vertical filtering
1186 if(minFilterSize == 1 && filterAlign == 2)
1187 filterAlign= 1;
1188 }
1189
81b7c056 1190 ASSERT(minFilterSize > 0)
6c7506de 1191 filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
81b7c056 1192 ASSERT(filterSize > 0)
8dfe9094 1193 filter= av_malloc(filterSize*dstW*sizeof(double));
bca11e75
MN
1194 if(filterSize >= MAX_FILTER_SIZE)
1195 return -1;
6c7506de
MN
1196 *outFilterSize= filterSize;
1197
4a53a912 1198 if(flags&SWS_PRINT_INFO)
b40e353a 1199 MSG_V("SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
c7f822d9
MN
1200 /* try to reduce the filter-size (step2 reduce it) */
1201 for(i=0; i<dstW; i++)
1202 {
1203 int j;
1204
6c7506de
MN
1205 for(j=0; j<filterSize; j++)
1206 {
1207 if(j>=filter2Size) filter[i*filterSize + j]= 0.0;
1208 else filter[i*filterSize + j]= filter2[i*filter2Size + j];
1209 }
c7f822d9 1210 }
94c4def2 1211 av_free(filter2); filter2=NULL;
6c7506de 1212
c7f822d9
MN
1213
1214 //FIXME try to align filterpos if possible
1215
28bf81c9
MN
1216 //fix borders
1217 for(i=0; i<dstW; i++)
1218 {
1219 int j;
c7f822d9 1220 if((*filterPos)[i] < 0)
28bf81c9
MN
1221 {
1222 // Move filter coeffs left to compensate for filterPos
6c7506de 1223 for(j=1; j<filterSize; j++)
28bf81c9 1224 {
6f209cb5 1225 int left= FFMAX(j + (*filterPos)[i], 0);
6c7506de
MN
1226 filter[i*filterSize + left] += filter[i*filterSize + j];
1227 filter[i*filterSize + j]=0;
28bf81c9 1228 }
c7f822d9 1229 (*filterPos)[i]= 0;
28bf81c9
MN
1230 }
1231
6c7506de 1232 if((*filterPos)[i] + filterSize > srcW)
28bf81c9 1233 {
6c7506de 1234 int shift= (*filterPos)[i] + filterSize - srcW;
28bf81c9 1235 // Move filter coeffs right to compensate for filterPos
6c7506de 1236 for(j=filterSize-2; j>=0; j--)
28bf81c9 1237 {
6f209cb5 1238 int right= FFMIN(j + shift, filterSize-1);
6c7506de
MN
1239 filter[i*filterSize +right] += filter[i*filterSize +j];
1240 filter[i*filterSize +j]=0;
28bf81c9 1241 }
6c7506de 1242 (*filterPos)[i]= srcW - filterSize;
28bf81c9
MN
1243 }
1244 }
1245
6c7506de 1246 // Note the +1 is for the MMXscaler which reads over the end
5edb653b 1247 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
0dea6433 1248 *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));
c7f822d9
MN
1249
1250 /* Normalize & Store in outFilter */
28bf81c9
MN
1251 for(i=0; i<dstW; i++)
1252 {
1253 int j;
ff490720 1254 double error=0;
28bf81c9
MN
1255 double sum=0;
1256 double scale= one;
ff490720 1257
6c7506de 1258 for(j=0; j<filterSize; j++)
28bf81c9 1259 {
6c7506de 1260 sum+= filter[i*filterSize + j];
28bf81c9
MN
1261 }
1262 scale/= sum;
93768378 1263 for(j=0; j<*outFilterSize; j++)
28bf81c9 1264 {
ff490720
MN
1265 double v= filter[i*filterSize + j]*scale + error;
1266 int intV= floor(v + 0.5);
1267 (*outFilter)[i*(*outFilterSize) + j]= intV;
1268 error = v - intV;
28bf81c9
MN
1269 }
1270 }
adeaecb9
MN
1271
1272 (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
1273 for(i=0; i<*outFilterSize; i++)
1274 {
1275 int j= dstW*(*outFilterSize);
1276 (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
1277 }
c7f822d9 1278
94c4def2 1279 av_free(filter);
bca11e75 1280 return 0;
7630f2e0 1281}
31190492 1282
17c613ef 1283#ifdef COMPILE_MMX2
b7dc6f66 1284static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)
28bf81c9 1285{
b7dc6f66 1286 uint8_t *fragmentA;
6e1c66bc
AJ
1287 long imm8OfPShufW1A;
1288 long imm8OfPShufW2A;
1289 long fragmentLengthA;
b7dc6f66 1290 uint8_t *fragmentB;
6e1c66bc
AJ
1291 long imm8OfPShufW1B;
1292 long imm8OfPShufW2B;
1293 long fragmentLengthB;
b7dc6f66 1294 int fragmentPos;
28bf81c9
MN
1295
1296 int xpos, i;
1297
1298 // create an optimized horizontal scaling routine
1299
1300 //code fragment
1301
1302 asm volatile(
1303 "jmp 9f \n\t"
1304 // Begin
1305 "0: \n\t"
6e1c66bc
AJ
1306 "movq (%%"REG_d", %%"REG_a"), %%mm3\n\t"
1307 "movd (%%"REG_c", %%"REG_S"), %%mm0\n\t"
1308 "movd 1(%%"REG_c", %%"REG_S"), %%mm1\n\t"
b7dc6f66
MN
1309 "punpcklbw %%mm7, %%mm1 \n\t"
1310 "punpcklbw %%mm7, %%mm0 \n\t"
28bf81c9
MN
1311 "pshufw $0xFF, %%mm1, %%mm1 \n\t"
1312 "1: \n\t"
28bf81c9
MN
1313 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
1314 "2: \n\t"
28bf81c9 1315 "psubw %%mm1, %%mm0 \n\t"
6d606c4f 1316 "movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"
28bf81c9 1317 "pmullw %%mm3, %%mm0 \n\t"
28bf81c9
MN
1318 "psllw $7, %%mm1 \n\t"
1319 "paddw %%mm1, %%mm0 \n\t"
1320
6e1c66bc 1321 "movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"
28bf81c9 1322
6e1c66bc 1323 "add $8, %%"REG_a" \n\t"
28bf81c9
MN
1324 // End
1325 "9: \n\t"
1326// "int $3\n\t"
6e1c66bc
AJ
1327 "lea 0b, %0 \n\t"
1328 "lea 1b, %1 \n\t"
1329 "lea 2b, %2 \n\t"
1330 "dec %1 \n\t"
1331 "dec %2 \n\t"
1332 "sub %0, %1 \n\t"
1333 "sub %0, %2 \n\t"
1334 "lea 9b, %3 \n\t"
1335 "sub %0, %3 \n\t"
b7dc6f66
MN
1336
1337
1338 :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
1339 "=r" (fragmentLengthA)
28bf81c9
MN
1340 );
1341
b7dc6f66
MN
1342 asm volatile(
1343 "jmp 9f \n\t"
1344 // Begin
1345 "0: \n\t"
6e1c66bc
AJ
1346 "movq (%%"REG_d", %%"REG_a"), %%mm3\n\t"
1347 "movd (%%"REG_c", %%"REG_S"), %%mm0\n\t"
b7dc6f66
MN
1348 "punpcklbw %%mm7, %%mm0 \n\t"
1349 "pshufw $0xFF, %%mm0, %%mm1 \n\t"
1350 "1: \n\t"
1351 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
1352 "2: \n\t"
1353 "psubw %%mm1, %%mm0 \n\t"
6d606c4f 1354 "movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"
b7dc6f66
MN
1355 "pmullw %%mm3, %%mm0 \n\t"
1356 "psllw $7, %%mm1 \n\t"
1357 "paddw %%mm1, %%mm0 \n\t"
1358
6e1c66bc 1359 "movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"
28bf81c9 1360
6e1c66bc 1361 "add $8, %%"REG_a" \n\t"
b7dc6f66
MN
1362 // End
1363 "9: \n\t"
1364// "int $3\n\t"
6e1c66bc
AJ
1365 "lea 0b, %0 \n\t"
1366 "lea 1b, %1 \n\t"
1367 "lea 2b, %2 \n\t"
1368 "dec %1 \n\t"
1369 "dec %2 \n\t"
1370 "sub %0, %1 \n\t"
1371 "sub %0, %2 \n\t"
1372 "lea 9b, %3 \n\t"
1373 "sub %0, %3 \n\t"
b7dc6f66
MN
1374
1375
1376 :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
1377 "=r" (fragmentLengthB)
1378 );
1379
1380 xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
1381 fragmentPos=0;
1382
1383 for(i=0; i<dstW/numSplits; i++)
28bf81c9
MN
1384 {
1385 int xx=xpos>>16;
1386
1387 if((i&3) == 0)
1388 {
1389 int a=0;
1390 int b=((xpos+xInc)>>16) - xx;
1391 int c=((xpos+xInc*2)>>16) - xx;
1392 int d=((xpos+xInc*3)>>16) - xx;
1393
b7dc6f66
MN
1394 filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
1395 filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
1396 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
1397 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
1398 filterPos[i/2]= xx;
1399
1400 if(d+1<4)
1401 {
1402 int maxShift= 3-(d+1);
1403 int shift=0;
1404
1405 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);
1406
1407 funnyCode[fragmentPos + imm8OfPShufW1B]=
1408 (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);
1409 funnyCode[fragmentPos + imm8OfPShufW2B]=
1410 a | (b<<2) | (c<<4) | (d<<6);
1411
1412 if(i+3>=dstW) shift=maxShift; //avoid overread
1413 else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
1414
1415 if(shift && i>=shift)
1416 {
1417 funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;
1418 funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;
1419 filterPos[i/2]-=shift;
1420 }
1421
1422 fragmentPos+= fragmentLengthB;
1423 }
1424 else
1425 {
1426 int maxShift= 3-d;
1427 int shift=0;
1428
1429 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);
28bf81c9 1430
b7dc6f66
MN
1431 funnyCode[fragmentPos + imm8OfPShufW1A]=
1432 funnyCode[fragmentPos + imm8OfPShufW2A]=
1433 a | (b<<2) | (c<<4) | (d<<6);
28bf81c9 1434
b7dc6f66
MN
1435 if(i+4>=dstW) shift=maxShift; //avoid overread
1436 else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align
28bf81c9 1437
b7dc6f66
MN
1438 if(shift && i>=shift)
1439 {
1440 funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;
1441 funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;
1442 filterPos[i/2]-=shift;
1443 }
1444
1445 fragmentPos+= fragmentLengthA;
1446 }
1447
1448 funnyCode[fragmentPos]= RET;
28bf81c9
MN
1449 }
1450 xpos+=xInc;
1451 }
b7dc6f66 1452 filterPos[i/2]= xpos>>16; // needed to jump to the next part
28bf81c9 1453}
17c613ef 1454#endif /* COMPILE_MMX2 */
28bf81c9 1455
9b2283cc 1456static void globalInit(void){
31190492
A
1457 // generating tables:
1458 int i;
c1b0bfb4 1459 for(i=0; i<768; i++){
b2afecbe 1460 int c= clip_uint8(i-256);
c1b0bfb4 1461 clip_table[i]=c;
b18ea156 1462 }
516b1f82 1463}
c1b0bfb4 1464
516b1f82
MN
1465static SwsFunc getSwsFunc(int flags){
1466
9bde778e 1467#if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)
3d6a30d9 1468#if defined(ARCH_X86)
28bf81c9 1469 // ordered per speed fasterst first
516b1f82
MN
1470 if(flags & SWS_CPU_CAPS_MMX2)
1471 return swScale_MMX2;
1472 else if(flags & SWS_CPU_CAPS_3DNOW)
1473 return swScale_3DNow;
1474 else if(flags & SWS_CPU_CAPS_MMX)
1475 return swScale_MMX;
28bf81c9 1476 else
516b1f82 1477 return swScale_C;
28bf81c9
MN
1478
1479#else
a2faa401
RD
1480#ifdef ARCH_POWERPC
1481 if(flags & SWS_CPU_CAPS_ALTIVEC)
1482 return swScale_altivec;
1483 else
1484 return swScale_C;
1485#endif
516b1f82 1486 return swScale_C;
3d6a30d9 1487#endif /* defined(ARCH_X86) */
28bf81c9
MN
1488#else //RUNTIME_CPUDETECT
1489#ifdef HAVE_MMX2
516b1f82 1490 return swScale_MMX2;
28bf81c9 1491#elif defined (HAVE_3DNOW)
516b1f82 1492 return swScale_3DNow;
28bf81c9 1493#elif defined (HAVE_MMX)
516b1f82 1494 return swScale_MMX;
a2faa401
RD
1495#elif defined (HAVE_ALTIVEC)
1496 return swScale_altivec;
28bf81c9 1497#else
516b1f82 1498 return swScale_C;
28bf81c9
MN
1499#endif
1500#endif //!RUNTIME_CPUDETECT
31190492 1501}
7630f2e0 1502
d4e24275 1503static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
0d9f3d85
A
1504 int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1505 uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1506 /* Copy Y plane */
12e11662 1507 if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
0d9f3d85
A
1508 memcpy(dst, src[0], srcSliceH*dstStride[0]);
1509 else
1510 {
1511 int i;
1512 uint8_t *srcPtr= src[0];
1513 uint8_t *dstPtr= dst;
1514 for(i=0; i<srcSliceH; i++)
1515 {
6118e52e 1516 memcpy(dstPtr, srcPtr, c->srcW);
0d9f3d85
A
1517 srcPtr+= srcStride[0];
1518 dstPtr+= dstStride[0];
1519 }
1520 }
6118e52e 1521 dst = dstParam[1] + dstStride[1]*srcSliceY/2;
e9e12f0e 1522 if (c->dstFormat == PIX_FMT_NV12)
6118e52e
VS
1523 interleaveBytes( src[1],src[2],dst,c->srcW/2,srcSliceH/2,srcStride[1],srcStride[2],dstStride[0] );
1524 else
1525 interleaveBytes( src[2],src[1],dst,c->srcW/2,srcSliceH/2,srcStride[2],srcStride[1],dstStride[0] );
fccb9b2b 1526
d4e24275 1527 return srcSliceH;
0d9f3d85
A
1528}
1529
d4e24275 1530static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
0d9f3d85
A
1531 int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1532 uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1533
fccb9b2b
MN
1534 yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
1535
d4e24275 1536 return srcSliceH;
0d9f3d85
A
1537}
1538
caeaabe7
AB
1539static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1540 int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1541 uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1542
1543 yv12touyvy( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
1544
1545 return srcSliceH;
1546}
1547
e09d12f4 1548/* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */
d4e24275 1549static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
e09d12f4
MN
1550 int srcSliceH, uint8_t* dst[], int dstStride[]){
1551 const int srcFormat= c->srcFormat;
1552 const int dstFormat= c->dstFormat;
e9e12f0e
LA
1553 const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;
1554 const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;
1555 const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */
1556 const int dstId= fmt_depth(dstFormat) >> 2;
73cbfb1c 1557 void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;
e09d12f4
MN
1558
1559 /* BGR -> BGR */
20380eb8
MN
1560 if( (isBGR(srcFormat) && isBGR(dstFormat))
1561 || (isRGB(srcFormat) && isRGB(dstFormat))){
e09d12f4
MN
1562 switch(srcId | (dstId<<4)){
1563 case 0x34: conv= rgb16to15; break;
1564 case 0x36: conv= rgb24to15; break;
1565 case 0x38: conv= rgb32to15; break;
1566 case 0x43: conv= rgb15to16; break;
1567 case 0x46: conv= rgb24to16; break;
1568 case 0x48: conv= rgb32to16; break;
1569 case 0x63: conv= rgb15to24; break;
1570 case 0x64: conv= rgb16to24; break;
1571 case 0x68: conv= rgb32to24; break;
1572 case 0x83: conv= rgb15to32; break;
1573 case 0x84: conv= rgb16to32; break;
1574 case 0x86: conv= rgb24to32; break;
1575 default: MSG_ERR("swScaler: internal error %s -> %s converter\n",
94c4def2 1576 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
b935781b 1577 }
20380eb8
MN
1578 }else if( (isBGR(srcFormat) && isRGB(dstFormat))
1579 || (isRGB(srcFormat) && isBGR(dstFormat))){
e09d12f4
MN
1580 switch(srcId | (dstId<<4)){
1581 case 0x33: conv= rgb15tobgr15; break;
1582 case 0x34: conv= rgb16tobgr15; break;
1583 case 0x36: conv= rgb24tobgr15; break;
1584 case 0x38: conv= rgb32tobgr15; break;
1585 case 0x43: conv= rgb15tobgr16; break;
1586 case 0x44: conv= rgb16tobgr16; break;
1587 case 0x46: conv= rgb24tobgr16; break;
1588 case 0x48: conv= rgb32tobgr16; break;
1589 case 0x63: conv= rgb15tobgr24; break;
1590 case 0x64: conv= rgb16tobgr24; break;
1591 case 0x66: conv= rgb24tobgr24; break;
1592 case 0x68: conv= rgb32tobgr24; break;
1593 case 0x83: conv= rgb15tobgr32; break;
1594 case 0x84: conv= rgb16tobgr32; break;
1595 case 0x86: conv= rgb24tobgr32; break;
1596 case 0x88: conv= rgb32tobgr32; break;
1597 default: MSG_ERR("swScaler: internal error %s -> %s converter\n",
94c4def2 1598 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
0d9f3d85 1599 }
20380eb8
MN
1600 }else{
1601 MSG_ERR("swScaler: internal error %s -> %s converter\n",
94c4def2 1602 sws_format_name(srcFormat), sws_format_name(dstFormat));
e09d12f4 1603 }
20380eb8 1604
e09d12f4
MN
1605 if(dstStride[0]*srcBpp == srcStride[0]*dstBpp)
1606 conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);
0d9f3d85
A
1607 else
1608 {
1609 int i;
1610 uint8_t *srcPtr= src[0];
1611 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
1612
1613 for(i=0; i<srcSliceH; i++)
1614 {
e09d12f4 1615 conv(srcPtr, dstPtr, c->srcW*srcBpp);
0d9f3d85
A
1616 srcPtr+= srcStride[0];
1617 dstPtr+= dstStride[0];
1618 }
1619 }
d4e24275 1620 return srcSliceH;
0d9f3d85
A
1621}
1622
d4e24275 1623static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
ec22603f
MN
1624 int srcSliceH, uint8_t* dst[], int dstStride[]){
1625
1626 rgb24toyv12(
1627 src[0],
1628 dst[0]+ srcSliceY *dstStride[0],
1629 dst[1]+(srcSliceY>>1)*dstStride[1],
1630 dst[2]+(srcSliceY>>1)*dstStride[2],
1631 c->srcW, srcSliceH,
1632 dstStride[0], dstStride[1], srcStride[0]);
d4e24275 1633 return srcSliceH;
ec22603f
MN
1634}
1635
d4e24275 1636static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
b241cbf2
MN
1637 int srcSliceH, uint8_t* dst[], int dstStride[]){
1638 int i;
1639
1640 /* copy Y */
12e11662 1641 if(srcStride[0]==dstStride[0] && srcStride[0] > 0)
b241cbf2
MN
1642 memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);
1643 else{
1644 uint8_t *srcPtr= src[0];
1645 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
1646
1647 for(i=0; i<srcSliceH; i++)
1648 {
1649 memcpy(dstPtr, srcPtr, c->srcW);
1650 srcPtr+= srcStride[0];
1651 dstPtr+= dstStride[0];
1652 }
1653 }
1654
e9e12f0e 1655 if(c->dstFormat==PIX_FMT_YUV420P){
b241cbf2
MN
1656 planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);
1657 planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);
1658 }else{
1659 planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);
1660 planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);
1661 }
d4e24275 1662 return srcSliceH;
b241cbf2
MN
1663}
1664
b6654a54 1665/* unscaled copy like stuff (assumes nearly identical formats) */
3e499f53
MN
1666static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1667 int srcSliceH, uint8_t* dst[], int dstStride[]){
b6654a54
MN
1668
1669 if(isPacked(c->srcFormat))
1670 {
12e11662 1671 if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
b6654a54
MN
1672 memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);
1673 else
1674 {
1675 int i;
1676 uint8_t *srcPtr= src[0];
1677 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
a861d4d7
MN
1678 int length=0;
1679
1680 /* universal length finder */
05749630
DB
1681 while(length+c->srcW <= FFABS(dstStride[0])
1682 && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;
a861d4d7 1683 ASSERT(length!=0);
b6654a54
MN
1684
1685 for(i=0; i<srcSliceH; i++)
1686 {
1687 memcpy(dstPtr, srcPtr, length);
1688 srcPtr+= srcStride[0];
1689 dstPtr+= dstStride[0];
1690 }
1691 }
1692 }
1693 else
44c1035c 1694 { /* Planar YUV or gray */
b6654a54
MN
1695 int plane;
1696 for(plane=0; plane<3; plane++)
1697 {
e616aa93
MN
1698 int length= plane==0 ? c->srcW : -((-c->srcW )>>c->chrDstHSubSample);
1699 int y= plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);
1700 int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);
44c1035c
MN
1701
1702 if((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)
0d9f3d85 1703 {
44c1035c 1704 if(!isGray(c->dstFormat))
e616aa93 1705 memset(dst[plane], 128, dstStride[plane]*height);
0d9f3d85 1706 }
b6654a54
MN
1707 else
1708 {
12e11662 1709 if(dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)
44c1035c
MN
1710 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);
1711 else
b6654a54 1712 {
44c1035c
MN
1713 int i;
1714 uint8_t *srcPtr= src[plane];
1715 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;
1716 for(i=0; i<height; i++)
1717 {
1718 memcpy(dstPtr, srcPtr, length);
1719 srcPtr+= srcStride[plane];
1720 dstPtr+= dstStride[plane];
1721 }
b6654a54
MN
1722 }
1723 }
1724 }
1725 }
d4e24275 1726 return srcSliceH;
37079906 1727}
28bf81c9 1728
4884b9e5
KS
1729static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1730 int srcSliceH, uint8_t* dst[], int dstStride[]){
1731
1732 int length= c->srcW;
1733 int y= srcSliceY;
1734 int height= srcSliceH;
1735 int i, j;
1736 uint8_t *srcPtr= src[0];
1737 uint8_t *dstPtr= dst[0] + dstStride[0]*y;
1738
1739 if(!isGray(c->dstFormat)){
1740 int height= -((-srcSliceH)>>c->chrDstVSubSample);
1741 memset(dst[1], 128, dstStride[1]*height);
1742 memset(dst[2], 128, dstStride[2]*height);
1743 }
1744 if(c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;
1745 for(i=0; i<height; i++)
1746 {
1747 for(j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];
1748 srcPtr+= srcStride[0];
1749 dstPtr+= dstStride[0];
1750 }
1751 return srcSliceH;
1752}
1753
1754static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1755 int srcSliceH, uint8_t* dst[], int dstStride[]){
1756
1757 int length= c->srcW;
1758 int y= srcSliceY;
1759 int height= srcSliceH;
1760 int i, j;
1761 uint8_t *srcPtr= src[0];
1762 uint8_t *dstPtr= dst[0] + dstStride[0]*y;
1763 for(i=0; i<height; i++)
1764 {
1765 for(j=0; j<length; j++)
1766 {
1767 dstPtr[j<<1] = srcPtr[j];
1768 dstPtr[(j<<1)+1] = srcPtr[j];
1769 }
1770 srcPtr+= srcStride[0];
1771 dstPtr+= dstStride[0];
1772 }
1773 return srcSliceH;
1774}
1775
1776static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1777 int srcSliceH, uint8_t* dst[], int dstStride[]){
1778
1779 int length= c->srcW;
1780 int y= srcSliceY;
1781 int height= srcSliceH;
1782 int i, j;
1783 uint16_t *srcPtr= src[0];
1784 uint16_t *dstPtr= dst[0] + dstStride[0]*y/2;
1785 for(i=0; i<height; i++)
1786 {
1787 for(j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);
1788 srcPtr+= srcStride[0]/2;
1789 dstPtr+= dstStride[0]/2;
1790 }
1791 return srcSliceH;
1792}
1793
1794
c7a810cc
MN
1795static void getSubSampleFactors(int *h, int *v, int format){
1796 switch(format){
e9e12f0e
LA
1797 case PIX_FMT_UYVY422:
1798 case PIX_FMT_YUYV422:
c7a810cc
MN
1799 *h=1;
1800 *v=0;
1801 break;
e9e12f0e 1802 case PIX_FMT_YUV420P:
4884b9e5
KS
1803 case PIX_FMT_GRAY16BE:
1804 case PIX_FMT_GRAY16LE:
e9e12f0e
LA
1805 case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented
1806 case PIX_FMT_NV12:
1807 case PIX_FMT_NV21:
c7a810cc
MN
1808 *h=1;
1809 *v=1;
1810 break;
e9e12f0e 1811 case PIX_FMT_YUV410P:
c7a810cc
MN
1812 *h=2;
1813 *v=2;
1814 break;
e9e12f0e 1815 case PIX_FMT_YUV444P:
d80e2fa2
MN
1816 *h=0;
1817 *v=0;
1818 break;
e9e12f0e 1819 case PIX_FMT_YUV422P:
d80e2fa2
MN
1820 *h=1;
1821 *v=0;
1822 break;
e9e12f0e 1823 case PIX_FMT_YUV411P:
d80e2fa2
MN
1824 *h=2;
1825 *v=0;
1826 break;
c7a810cc
MN
1827 default:
1828 *h=0;
1829 *v=0;
1830 break;
1831 }
1832}
1833
5427e242
MN
1834static uint16_t roundToInt16(int64_t f){
1835 int r= (f + (1<<15))>>16;
1836 if(r<-0x7FFF) return 0x8000;
1837 else if(r> 0x7FFF) return 0x7FFF;
1838 else return r;
0481412a
MN
1839}
1840
1841/**
5427e242 1842 * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]
0481412a 1843 * @param fullRange if 1 then the luma range is 0..255 if 0 its 16..235
5427e242 1844 * @return -1 if not supported
0481412a 1845 */
5427e242
MN
1846int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){
1847 int64_t crv = inv_table[0];
1848 int64_t cbu = inv_table[1];
1849 int64_t cgu = -inv_table[2];
1850 int64_t cgv = -inv_table[3];
1851 int64_t cy = 1<<16;
1852 int64_t oy = 0;
1853
1854 if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
1855 memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
1856 memcpy(c->dstColorspaceTable, table, sizeof(int)*4);
1857
1858 c->brightness= brightness;
1859 c->contrast = contrast;
1860 c->saturation= saturation;
1861 c->srcRange = srcRange;
1862 c->dstRange = dstRange;
0481412a
MN
1863
1864 c->uOffset= 0x0400040004000400LL;
1865 c->vOffset= 0x0400040004000400LL;
1866
5427e242
MN
1867 if(!srcRange){
1868 cy= (cy*255) / 219;
1869 oy= 16<<16;
0481412a
MN
1870 }
1871
5427e242
MN
1872 cy = (cy *contrast )>>16;
1873 crv= (crv*contrast * saturation)>>32;
1874 cbu= (cbu*contrast * saturation)>>32;
1875 cgu= (cgu*contrast * saturation)>>32;
1876 cgv= (cgv*contrast * saturation)>>32;
0481412a 1877
5427e242 1878 oy -= 256*brightness;
0481412a
MN
1879
1880 c->yCoeff= roundToInt16(cy *8192) * 0x0001000100010001ULL;
1881 c->vrCoeff= roundToInt16(crv*8192) * 0x0001000100010001ULL;
1882 c->ubCoeff= roundToInt16(cbu*8192) * 0x0001000100010001ULL;
1883 c->vgCoeff= roundToInt16(cgv*8192) * 0x0001000100010001ULL;
1884 c->ugCoeff= roundToInt16(cgu*8192) * 0x0001000100010001ULL;
1885 c->yOffset= roundToInt16(oy * 8) * 0x0001000100010001ULL;
5427e242
MN
1886
1887 yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
1888 //FIXME factorize
a31de956 1889
6634d0ef
NP
1890#ifdef COMPILE_ALTIVEC
1891 if (c->flags & SWS_CPU_CAPS_ALTIVEC)
1892 yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);
a31de956 1893#endif
5427e242
MN
1894 return 0;
1895}
1896
1897/**
1898 * @return -1 if not supported
1899 */
1900int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){
1901 if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
1902
1903 *inv_table = c->srcColorspaceTable;
1904 *table = c->dstColorspaceTable;
1905 *srcRange = c->srcRange;
1906 *dstRange = c->dstRange;
1907 *brightness= c->brightness;
1908 *contrast = c->contrast;
1909 *saturation= c->saturation;
1910
1911 return 0;
0481412a
MN
1912}
1913
44cdb423
LA
1914static int handle_jpeg(int *format)
1915{
1916 switch (*format) {
1917 case PIX_FMT_YUVJ420P:
1918 *format = PIX_FMT_YUV420P;
1919 return 1;
1920 case PIX_FMT_YUVJ422P:
1921 *format = PIX_FMT_YUV422P;
1922 return 1;
1923 case PIX_FMT_YUVJ444P:
1924 *format = PIX_FMT_YUV444P;
1925 return 1;
1926 default:
1927 return 0;
1928 }
1929}
1930
e9e12f0e 1931SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
66d1cdb6 1932 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){
28bf81c9 1933
28bf81c9
MN
1934 SwsContext *c;
1935 int i;
ec62c38f 1936 int usesVFilter, usesHFilter;
e09d12f4 1937 int unscaled, needsDither;
44cdb423 1938 int srcRange, dstRange;
c7f822d9 1939 SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
3d6a30d9 1940#if defined(ARCH_X86)
516b1f82 1941 if(flags & SWS_CPU_CAPS_MMX)
5cebb24b
MN
1942 asm volatile("emms\n\t"::: "memory");
1943#endif
516b1f82 1944
9bde778e 1945#if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off
a2faa401 1946 flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC);
516b1f82
MN
1947#ifdef HAVE_MMX2
1948 flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;
1949#elif defined (HAVE_3DNOW)
1950 flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;
1951#elif defined (HAVE_MMX)
1952 flags |= SWS_CPU_CAPS_MMX;
a2faa401
RD
1953#elif defined (HAVE_ALTIVEC)
1954 flags |= SWS_CPU_CAPS_ALTIVEC;
516b1f82 1955#endif
69796008 1956#endif /* RUNTIME_CPUDETECT */
516b1f82 1957 if(clip_table[512] != 255) globalInit();
700490a4 1958 if(rgb15to16 == NULL) sws_rgb2rgb_init(flags);
fccb9b2b 1959
44c1035c 1960 unscaled = (srcW == dstW && srcH == dstH);
e09d12f4 1961 needsDither= (isBGR(dstFormat) || isRGB(dstFormat))
e9e12f0e
LA
1962 && (fmt_depth(dstFormat))<24
1963 && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));
44c1035c 1964
44cdb423
LA
1965 srcRange = handle_jpeg(&srcFormat);
1966 dstRange = handle_jpeg(&dstFormat);
1967
44c1035c 1968 if(!isSupportedIn(srcFormat))
b81cf274 1969 {
94c4def2 1970 MSG_ERR("swScaler: %s is not supported as input format\n", sws_format_name(srcFormat));
44c1035c
MN
1971 return NULL;
1972 }
1973 if(!isSupportedOut(dstFormat))
1974 {
94c4def2 1975 MSG_ERR("swScaler: %s is not supported as output format\n", sws_format_name(dstFormat));
44c1035c 1976 return NULL;
b81cf274 1977 }
44c1035c 1978
28bf81c9 1979 /* sanity check */
b81cf274
MN
1980 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
1981 {
0d9f3d85 1982 MSG_ERR("swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
b81cf274
MN
1983 srcW, srcH, dstW, dstH);
1984 return NULL;
1985 }
28bf81c9 1986
c7f822d9
MN
1987 if(!dstFilter) dstFilter= &dummyFilter;
1988 if(!srcFilter) srcFilter= &dummyFilter;
1989
0dea6433 1990 c= av_mallocz(sizeof(SwsContext));
28bf81c9
MN
1991
1992 c->srcW= srcW;
1993 c->srcH= srcH;
1994 c->dstW= dstW;
1995 c->dstH= dstH;
5521b193
MN
1996 c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
1997 c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
28bf81c9
MN
1998 c->flags= flags;
1999 c->dstFormat= dstFormat;
2000 c->srcFormat= srcFormat;
379a2036 2001 c->vRounder= 4* 0x0001000100010001ULL;
28bf81c9 2002
ec62c38f
MN
2003 usesHFilter= usesVFilter= 0;
2004 if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesVFilter=1;
2005 if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesHFilter=1;
2006 if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesVFilter=1;
2007 if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesHFilter=1;
2008 if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesVFilter=1;
2009 if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesHFilter=1;
2010 if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesVFilter=1;
2011 if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesHFilter=1;
e616aa93
MN
2012
2013 getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
2014 getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
2015
2016 // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation
2017 if((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
2018
5859233b
MN
2019 // drop some chroma lines if the user wants it
2020 c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
2021 c->chrSrcVSubSample+= c->vChrDrop;
e616aa93 2022
5859233b 2023 // drop every 2. pixel for chroma calculation unless user wants full chroma
e616aa93
MN
2024 if((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP))
2025 c->chrSrcHSubSample=1;
2026
66d1cdb6
MN
2027 if(param){
2028 c->param[0] = param[0];
2029 c->param[1] = param[1];
2030 }else{
2031 c->param[0] =
2032 c->param[1] = SWS_PARAM_DEFAULT;
2033 }
2034
e616aa93
MN
2035 c->chrIntHSubSample= c->chrDstHSubSample;
2036 c->chrIntVSubSample= c->chrSrcVSubSample;
5427e242 2037
e616aa93
MN
2038 // note the -((-x)>>y) is so that we allways round toward +inf
2039 c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
2040 c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
2041 c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
2042 c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
5427e242 2043
44cdb423 2044 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 2045
b935781b 2046 /* unscaled special Cases */
ec62c38f 2047 if(unscaled && !usesHFilter && !usesVFilter)
37079906 2048 {
0d9f3d85 2049 /* yv12_to_nv12 */
e9e12f0e 2050 if(srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))
0d9f3d85
A
2051 {
2052 c->swScale= PlanarToNV12Wrapper;
0d9f3d85 2053 }
9bde778e 2054#ifdef CONFIG_GPL
37079906 2055 /* yuv2bgr */
e9e12f0e 2056 if((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))
37079906 2057 {
5427e242 2058 c->swScale= yuv2rgb_get_func_ptr(c);
37079906 2059 }
9bde778e 2060#endif
b241cbf2 2061
e9e12f0e 2062 if( srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P )
b241cbf2
MN
2063 {
2064 c->swScale= yvu9toyv12Wrapper;
b241cbf2
MN
2065 }
2066
ec22603f 2067 /* bgr24toYV12 */
e9e12f0e 2068 if(srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)
ec22603f 2069 c->swScale= bgr24toyv12Wrapper;
e09d12f4
MN
2070
2071 /* rgb/bgr -> rgb/bgr (no dither needed forms) */
2072 if( (isBGR(srcFormat) || isRGB(srcFormat))
2073 && (isBGR(dstFormat) || isRGB(dstFormat))
2074 && !needsDither)
2075 c->swScale= rgb2rgbWrapper;
2076
2077 /* LQ converters if -sws 0 or -sws 4*/
2078 if(c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){
2079 /* rgb/bgr -> rgb/bgr (dither needed forms) */
2080 if( (isBGR(srcFormat) || isRGB(srcFormat))
2081 && (isBGR(dstFormat) || isRGB(dstFormat))
2082 && needsDither)
2083 c->swScale= rgb2rgbWrapper;
2ce486d8
MN
2084
2085 /* yv12_to_yuy2 */
e9e12f0e
LA
2086 if(srcFormat == PIX_FMT_YUV420P &&
2087 (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))
2ce486d8 2088 {
e9e12f0e 2089 if (dstFormat == PIX_FMT_YUYV422)
caeaabe7
AB
2090 c->swScale= PlanarToYuy2Wrapper;
2091 else
2092 c->swScale= PlanarToUyvyWrapper;
2ce486d8 2093 }
e09d12f4 2094 }
ec22603f 2095
6634d0ef 2096#ifdef COMPILE_ALTIVEC
b71cf33c 2097 if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&
e9e12f0e
LA
2098 ((srcFormat == PIX_FMT_YUV420P &&
2099 (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {
b71cf33c 2100 // unscaled YV12 -> packed YUV, we want speed
e9e12f0e 2101 if (dstFormat == PIX_FMT_YUYV422)
b71cf33c
RD
2102 c->swScale= yv12toyuy2_unscaled_altivec;
2103 else
2104 c->swScale= yv12touyvy_unscaled_altivec;
2105 }
2106#endif
2107
20380eb8
MN
2108 /* simple copy */
2109 if( srcFormat == dstFormat
20380eb8
MN
2110 || (isPlanarYUV(srcFormat) && isGray(dstFormat))
2111 || (isPlanarYUV(dstFormat) && isGray(srcFormat))
2112 )
2113 {
2114 c->swScale= simpleCopy;
2115 }
2116
4884b9e5
KS
2117 /* gray16{le,be} conversions */
2118 if(isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))
2119 {
2120 c->swScale= gray16togray;
2121 }
2122 if((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))
2123 {
2124 c->swScale= graytogray16;
2125 }
2126 if(srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))
2127 {
2128 c->swScale= gray16swap;
2129 }
2130
e09d12f4 2131 if(c->swScale){
ec22603f 2132 if(flags&SWS_PRINT_INFO)
0d9f3d85 2133 MSG_INFO("SwScaler: using unscaled %s -> %s special converter\n",
94c4def2 2134 sws_format_name(srcFormat), sws_format_name(dstFormat));
ec22603f
MN
2135 return c;
2136 }
37079906
MN
2137 }
2138
516b1f82 2139 if(flags & SWS_CPU_CAPS_MMX2)
28bf81c9
MN
2140 {
2141 c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
2142 if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))
2143 {
2144 if(flags&SWS_PRINT_INFO)
0d9f3d85 2145 MSG_INFO("SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");
28bf81c9 2146 }
ec62c38f 2147 if(usesHFilter) c->canMMX2BeUsed=0;
28bf81c9
MN
2148 }
2149 else
2150 c->canMMX2BeUsed=0;
2151
1e621b18
MN
2152 c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
2153 c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
2154
28bf81c9
MN
2155 // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
2156 // but only for the FAST_BILINEAR mode otherwise do correct scaling
2157 // n-2 is the last chrominance sample available
2158 // this is not perfect, but noone shuld notice the difference, the more correct variant
2159 // would be like the vertical one, but that would require some special code for the
2160 // first and last pixel
2161 if(flags&SWS_FAST_BILINEAR)
2162 {
1e621b18
MN
2163 if(c->canMMX2BeUsed)
2164 {
2165 c->lumXInc+= 20;
2166 c->chrXInc+= 20;
2167 }
77a416e8 2168 //we don't use the x86asm scaler if mmx is available
516b1f82 2169 else if(flags & SWS_CPU_CAPS_MMX)
1e621b18
MN
2170 {
2171 c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
2172 c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
2173 }
28bf81c9
MN
2174 }
2175
28bf81c9
MN
2176 /* precalculate horizontal scaler filter coefficients */
2177 {
8c266f0c
RD
2178 const int filterAlign=
2179 (flags & SWS_CPU_CAPS_MMX) ? 4 :
2180 (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
2181 1;
28bf81c9 2182
c7f822d9 2183 initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
81a571a8
MN
2184 srcW , dstW, filterAlign, 1<<14,
2185 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags,
66d1cdb6 2186 srcFilter->lumH, dstFilter->lumH, c->param);
c7f822d9 2187 initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
81a571a8
MN
2188 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
2189 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
66d1cdb6 2190 srcFilter->chrH, dstFilter->chrH, c->param);
28bf81c9 2191
dbdae6ec 2192#define MAX_FUNNY_CODE_SIZE 10000
17c613ef 2193#if defined(COMPILE_MMX2)
77a416e8 2194// can't downscale !!!
28bf81c9
MN
2195 if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))
2196 {
113ef149 2197#ifdef MAP_ANONYMOUS
38d5c282
AJ
2198 c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
2199 c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
2200#else
8dfe9094
RD
2201 c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);
2202 c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);
38d5c282
AJ
2203#endif
2204
8dfe9094
RD
2205 c->lumMmx2Filter = av_malloc((dstW /8+8)*sizeof(int16_t));
2206 c->chrMmx2Filter = av_malloc((c->chrDstW /4+8)*sizeof(int16_t));
2207 c->lumMmx2FilterPos= av_malloc((dstW /2/8+8)*sizeof(int32_t));
2208 c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));
b7dc6f66
MN
2209
2210 initMMX2HScaler( dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);
2211 initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);
28bf81c9 2212 }
17c613ef 2213#endif /* defined(COMPILE_MMX2) */
28bf81c9
MN
2214 } // Init Horizontal stuff
2215
2216
2217
2218 /* precalculate vertical scaler filter coefficients */
8c266f0c
RD
2219 {
2220 const int filterAlign=
bca11e75 2221 (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
8c266f0c
RD
2222 (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
2223 1;
2224
2225 initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
2226 srcH , dstH, filterAlign, (1<<12)-4,
2227 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags,
66d1cdb6 2228 srcFilter->lumV, dstFilter->lumV, c->param);
8c266f0c
RD
2229 initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
2230 c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,
2231 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
66d1cdb6 2232 srcFilter->chrV, dstFilter->chrV, c->param);
d33d485e
AC
2233
2234#ifdef HAVE_ALTIVEC
8dfe9094 2235 c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);
d8cfa553 2236 c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);
d33d485e
AC
2237
2238 for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
2239 int j;
2240 short *p = (short *)&c->vYCoeffsBank[i];
2241 for (j=0;j<8;j++)
2242 p[j] = c->vLumFilter[i];
2243 }
2244
247d2c96 2245 for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
d33d485e
AC
2246 int j;
2247 short *p = (short *)&c->vCCoeffsBank[i];
2248 for (j=0;j<8;j++)
2249 p[j] = c->vChrFilter[i];
2250 }
2251#endif
8c266f0c 2252 }
28bf81c9 2253
77a416e8 2254 // Calculate Buffer Sizes so that they won't run out while handling these damn slices
28bf81c9
MN
2255 c->vLumBufSize= c->vLumFilterSize;
2256 c->vChrBufSize= c->vChrFilterSize;
2257 for(i=0; i<dstH; i++)
2258 {
2259 int chrI= i*c->chrDstH / dstH;
6f209cb5 2260 int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1,
e616aa93 2261 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
c4f1e443
MN
2262
2263 nextSlice>>= c->chrSrcVSubSample;
2264 nextSlice<<= c->chrSrcVSubSample;
28bf81c9
MN
2265 if(c->vLumFilterPos[i ] + c->vLumBufSize < nextSlice)
2266 c->vLumBufSize= nextSlice - c->vLumFilterPos[i ];
e616aa93
MN
2267 if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
2268 c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
28bf81c9
MN
2269 }
2270
2271 // allocate pixbufs (we use dynamic allocation because otherwise we would need to
8dfe9094
RD
2272 c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));
2273 c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));
6c7506de 2274 //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 2275 /* align at 16 bytes for AltiVec */
28bf81c9 2276 for(i=0; i<c->vLumBufSize; i++)
0dea6433 2277 c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(4000);
28bf81c9 2278 for(i=0; i<c->vChrBufSize; i++)
8dfe9094 2279 c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc(8000);
28bf81c9
MN
2280
2281 //try to avoid drawing green stuff between the right end and the stride end
28bf81c9
MN
2282 for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);
2283
2284 ASSERT(c->chrDstH <= dstH)
28bf81c9 2285
28bf81c9
MN
2286 if(flags&SWS_PRINT_INFO)
2287 {
2288#ifdef DITHER1XBPP
5521b193
MN
2289 char *dither= " dithered";
2290#else
2291 char *dither= "";
28bf81c9
MN
2292#endif
2293 if(flags&SWS_FAST_BILINEAR)
4cedbe5c 2294 MSG_INFO("SwScaler: FAST_BILINEAR scaler, ");
28bf81c9 2295 else if(flags&SWS_BILINEAR)
4cedbe5c 2296 MSG_INFO("SwScaler: BILINEAR scaler, ");
28bf81c9 2297 else if(flags&SWS_BICUBIC)
4cedbe5c 2298 MSG_INFO("SwScaler: BICUBIC scaler, ");
1e621b18 2299 else if(flags&SWS_X)
4cedbe5c 2300 MSG_INFO("SwScaler: Experimental scaler, ");
ff7ba856 2301 else if(flags&SWS_POINT)
4cedbe5c 2302 MSG_INFO("SwScaler: Nearest Neighbor / POINT scaler, ");
d8863d37 2303 else if(flags&SWS_AREA)
4cedbe5c 2304 MSG_INFO("SwScaler: Area Averageing scaler, ");
81a571a8 2305 else if(flags&SWS_BICUBLIN)
4cedbe5c 2306 MSG_INFO("SwScaler: luma BICUBIC / chroma BILINEAR scaler, ");
a86c461c 2307 else if(flags&SWS_GAUSS)
4cedbe5c 2308 MSG_INFO("SwScaler: Gaussian scaler, ");
a86c461c 2309 else if(flags&SWS_SINC)
4cedbe5c 2310 MSG_INFO("SwScaler: Sinc scaler, ");
a86c461c 2311 else if(flags&SWS_LANCZOS)
4cedbe5c 2312 MSG_INFO("SwScaler: Lanczos scaler, ");
a86c461c 2313 else if(flags&SWS_SPLINE)
4cedbe5c 2314 MSG_INFO("SwScaler: Bicubic spline scaler, ");
28bf81c9 2315 else
4cedbe5c 2316 MSG_INFO("SwScaler: ehh flags invalid?! ");
28bf81c9 2317
e9e12f0e 2318 if(dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)
0d9f3d85 2319 MSG_INFO("from %s to%s %s ",
94c4def2 2320 sws_format_name(srcFormat), dither, sws_format_name(dstFormat));
0d9f3d85
A
2321 else
2322 MSG_INFO("from %s to %s ",
94c4def2 2323 sws_format_name(srcFormat), sws_format_name(dstFormat));
28bf81c9 2324
516b1f82 2325 if(flags & SWS_CPU_CAPS_MMX2)
0d9f3d85 2326 MSG_INFO("using MMX2\n");
516b1f82 2327 else if(flags & SWS_CPU_CAPS_3DNOW)
0d9f3d85 2328 MSG_INFO("using 3DNOW\n");
516b1f82 2329 else if(flags & SWS_CPU_CAPS_MMX)
0d9f3d85 2330 MSG_INFO("using MMX\n");
a2faa401
RD
2331 else if(flags & SWS_CPU_CAPS_ALTIVEC)
2332 MSG_INFO("using AltiVec\n");
2333 else
0d9f3d85 2334 MSG_INFO("using C\n");
28bf81c9
MN
2335 }
2336
516b1f82 2337 if(flags & SWS_PRINT_INFO)
28bf81c9 2338 {
516b1f82 2339 if(flags & SWS_CPU_CAPS_MMX)
28bf81c9
MN
2340 {
2341 if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
0d9f3d85 2342 MSG_V("SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
28bf81c9
MN
2343 else
2344 {
2345 if(c->hLumFilterSize==4)
0d9f3d85 2346 MSG_V("SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");
28bf81c9 2347 else if(c->hLumFilterSize==8)
0d9f3d85 2348 MSG_V("SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");
28bf81c9 2349 else
0d9f3d85 2350 MSG_V("SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");
28bf81c9
MN
2351
2352 if(c->hChrFilterSize==4)
0d9f3d85 2353 MSG_V("SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");
28bf81c9 2354 else if(c->hChrFilterSize==8)
0d9f3d85 2355 MSG_V("SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");
28bf81c9 2356 else
0d9f3d85 2357 MSG_V("SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");
28bf81c9
MN
2358 }
2359 }
2360 else
2361 {
3d6a30d9 2362#if defined(ARCH_X86)
0d9f3d85 2363 MSG_V("SwScaler: using X86-Asm scaler for horizontal scaling\n");
28bf81c9
MN
2364#else
2365 if(flags & SWS_FAST_BILINEAR)
0d9f3d85 2366 MSG_V("SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");
28bf81c9 2367 else
0d9f3d85 2368 MSG_V("SwScaler: using C scaler for horizontal scaling\n");
28bf81c9
MN
2369#endif
2370 }
6c7506de 2371 if(isPlanarYUV(dstFormat))
28bf81c9
MN
2372 {
2373 if(c->vLumFilterSize==1)
516b1f82 2374 MSG_V("SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2375 else
516b1f82 2376 MSG_V("SwScaler: using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9
MN
2377 }
2378 else
2379 {
2380 if(c->vLumFilterSize==1 && c->vChrFilterSize==2)
0d9f3d85 2381 MSG_V("SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
516b1f82 2382 "SwScaler: 2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2383 else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)
516b1f82 2384 MSG_V("SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2385 else
516b1f82 2386 MSG_V("SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9
MN
2387 }
2388
e9e12f0e 2389 if(dstFormat==PIX_FMT_BGR24)
0d9f3d85 2390 MSG_V("SwScaler: using %s YV12->BGR24 Converter\n",
516b1f82 2391 (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));
e9e12f0e 2392 else if(dstFormat==PIX_FMT_RGB32)
516b1f82 2393 MSG_V("SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
e9e12f0e 2394 else if(dstFormat==PIX_FMT_BGR565)
516b1f82 2395 MSG_V("SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
e9e12f0e 2396 else if(dstFormat==PIX_FMT_BGR555)
516b1f82 2397 MSG_V("SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
28bf81c9 2398
0d9f3d85 2399 MSG_V("SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
28bf81c9 2400 }
516b1f82 2401 if(flags & SWS_PRINT_INFO)
1e621b18 2402 {
0d9f3d85 2403 MSG_DBG2("SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1e621b18 2404 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
0d9f3d85 2405 MSG_DBG2("SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1e621b18
MN
2406 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
2407 }
37079906 2408
516b1f82 2409 c->swScale= getSwsFunc(flags);
28bf81c9
MN
2410 return c;
2411}
2412
2413/**
77a416e8 2414 * swscale warper, so we don't need to export the SwsContext.
fccb9b2b
MN
2415 * assumes planar YUV to be in YUV order instead of YVU
2416 */
703b56fb 2417int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
fccb9b2b 2418 int srcSliceH, uint8_t* dst[], int dstStride[]){
e63ac25d
JM
2419 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
2420 MSG_ERR("swScaler: slices start in the middle!\n");
2421 return 0;
2422 }
2423 if (c->sliceDir == 0) {
2424 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
2425 }
2426
2427 // copy strides, so they can safely be modified
2428 if (c->sliceDir == 1) {
2429 // slices go from top to bottom
2430 int srcStride2[3]= {srcStride[0], srcStride[1], srcStride[2]};
2431 int dstStride2[3]= {dstStride[0], dstStride[1], dstStride[2]};
2432 return c->swScale(c, src, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);
2433 } else {
2434 // slices go from bottom to top => we flip the image internally
2435 uint8_t* src2[3]= {src[0] + (srcSliceH-1)*srcStride[0],
2436 src[1] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1],
2437 src[2] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2]
2438 };
2439 uint8_t* dst2[3]= {dst[0] + (c->dstH-1)*dstStride[0],
2440 dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],
2441 dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};
2442 int srcStride2[3]= {-srcStride[0], -srcStride[1], -srcStride[2]};
2443 int dstStride2[3]= {-dstStride[0], -dstStride[1], -dstStride[2]};
2444
2445 return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);
2446 }
fccb9b2b
MN
2447}
2448
2449/**
77a416e8 2450 * swscale warper, so we don't need to export the SwsContext
d4e24275 2451 */
703b56fb
LA
2452int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
2453 int srcSliceH, uint8_t* dst[], int dstStride[]){
2454 return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);
d4e24275 2455}
d4e24275 2456
e21206a8
MN
2457SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
2458 float lumaSharpen, float chromaSharpen,
2459 float chromaHShift, float chromaVShift,
2460 int verbose)
2461{
94c4def2 2462 SwsFilter *filter= av_malloc(sizeof(SwsFilter));
e21206a8
MN
2463
2464 if(lumaGBlur!=0.0){
2465 filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
2466 filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
2467 }else{
2468 filter->lumH= sws_getIdentityVec();
2469 filter->lumV= sws_getIdentityVec();
2470 }
2471
2472 if(chromaGBlur!=0.0){
2473 filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
2474 filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
2475 }else{
2476 filter->chrH= sws_getIdentityVec();
2477 filter->chrV= sws_getIdentityVec();
2478 }
2479
2480 if(chromaSharpen!=0.0){
2e728364
MN
2481 SwsVector *id= sws_getIdentityVec();
2482 sws_scaleVec(filter->chrH, -chromaSharpen);
2483 sws_scaleVec(filter->chrV, -chromaSharpen);
2484 sws_addVec(filter->chrH, id);
2485 sws_addVec(filter->chrV, id);
e21206a8
MN
2486 sws_freeVec(id);
2487 }
2488
2489 if(lumaSharpen!=0.0){
2e728364
MN
2490 SwsVector *id= sws_getIdentityVec();
2491 sws_scaleVec(filter->lumH, -lumaSharpen);
2492 sws_scaleVec(filter->lumV, -lumaSharpen);
2493 sws_addVec(filter->lumH, id);
2494 sws_addVec(filter->lumV, id);
e21206a8
MN
2495 sws_freeVec(id);
2496 }
2497
2498 if(chromaHShift != 0.0)
2499 sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
2500
2501 if(chromaVShift != 0.0)
2502 sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
2503
2504 sws_normalizeVec(filter->chrH, 1.0);
2505 sws_normalizeVec(filter->chrV, 1.0);
2506 sws_normalizeVec(filter->lumH, 1.0);
2507 sws_normalizeVec(filter->lumV, 1.0);
2508
2509 if(verbose) sws_printVec(filter->chrH);
2510 if(verbose) sws_printVec(filter->lumH);
2511
2512 return filter;
2513}
2514
d4e24275 2515/**
28bf81c9
MN
2516 * returns a normalized gaussian curve used to filter stuff
2517 * quality=3 is high quality, lowwer is lowwer quality
2518 */
d4e24275 2519SwsVector *sws_getGaussianVec(double variance, double quality){
28bf81c9
MN
2520 const int length= (int)(variance*quality + 0.5) | 1;
2521 int i;
8dfe9094 2522 double *coeff= av_malloc(length*sizeof(double));
28bf81c9 2523 double middle= (length-1)*0.5;
94c4def2 2524 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2525
2526 vec->coeff= coeff;
2527 vec->length= length;
28bf81c9
MN
2528
2529 for(i=0; i<length; i++)
2530 {
2531 double dist= i-middle;
2532 coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);
2533 }
2534
d4e24275 2535 sws_normalizeVec(vec, 1.0);
c7f822d9
MN
2536
2537 return vec;
28bf81c9
MN
2538}
2539
d4e24275 2540SwsVector *sws_getConstVec(double c, int length){
5521b193 2541 int i;
8dfe9094 2542 double *coeff= av_malloc(length*sizeof(double));
94c4def2 2543 SwsVector *vec= av_malloc(sizeof(SwsVector));
5521b193
MN
2544
2545 vec->coeff= coeff;
2546 vec->length= length;
2547
2548 for(i=0; i<length; i++)
2549 coeff[i]= c;
2550
2551 return vec;
2552}
2553
2554
d4e24275 2555SwsVector *sws_getIdentityVec(void){
2e728364 2556 return sws_getConstVec(1.0, 1);
c7f822d9
MN
2557}
2558
2e728364 2559double sws_dcVec(SwsVector *a){
28bf81c9 2560 int i;
2e728364 2561 double sum=0;
28bf81c9 2562
c7f822d9
MN
2563 for(i=0; i<a->length; i++)
2564 sum+= a->coeff[i];
28bf81c9 2565
2e728364 2566 return sum;
28bf81c9
MN
2567}
2568
d4e24275 2569void sws_scaleVec(SwsVector *a, double scalar){
c7f822d9
MN
2570 int i;
2571
2572 for(i=0; i<a->length; i++)
2573 a->coeff[i]*= scalar;
2574}
2575
2e728364
MN
2576void sws_normalizeVec(SwsVector *a, double height){
2577 sws_scaleVec(a, height/sws_dcVec(a));
2578}
2579
d4e24275 2580static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){
c7f822d9 2581 int length= a->length + b->length - 1;
8dfe9094 2582 double *coeff= av_malloc(length*sizeof(double));
28bf81c9 2583 int i, j;
94c4def2 2584 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2585
2586 vec->coeff= coeff;
2587 vec->length= length;
28bf81c9
MN
2588
2589 for(i=0; i<length; i++) coeff[i]= 0.0;
2590
c7f822d9 2591 for(i=0; i<a->length; i++)
28bf81c9 2592 {
c7f822d9 2593 for(j=0; j<b->length; j++)
28bf81c9 2594 {
c7f822d9 2595 coeff[i+j]+= a->coeff[i]*b->coeff[j];
28bf81c9
MN
2596 }
2597 }
2598
c7f822d9 2599 return vec;
28bf81c9
MN
2600}
2601
d4e24275 2602static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){
6f209cb5 2603 int length= FFMAX(a->length, b->length);
8dfe9094 2604 double *coeff= av_malloc(length*sizeof(double));
28bf81c9 2605 int i;
94c4def2 2606 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2607
2608 vec->coeff= coeff;
2609 vec->length= length;
28bf81c9
MN
2610
2611 for(i=0; i<length; i++) coeff[i]= 0.0;
2612
c7f822d9
MN
2613 for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
2614 for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
2615
2616 return vec;
28bf81c9 2617}
c7f822d9 2618
d4e24275 2619static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){
6f209cb5 2620 int length= FFMAX(a->length, b->length);
8dfe9094 2621 double *coeff= av_malloc(length*sizeof(double));
c7f822d9 2622 int i;
94c4def2 2623 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2624
2625 vec->coeff= coeff;
2626 vec->length= length;
2627
2628 for(i=0; i<length; i++) coeff[i]= 0.0;
2629
2630 for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
2631 for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
2632
2633 return vec;
2634}
2635
2636/* shift left / or right if "shift" is negative */
d4e24275 2637static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){
05749630 2638 int length= a->length + FFABS(shift)*2;
8dfe9094 2639 double *coeff= av_malloc(length*sizeof(double));
ff7ba856 2640 int i;
94c4def2 2641 SwsVector *vec= av_malloc(sizeof(SwsVector));
c7f822d9
MN
2642
2643 vec->coeff= coeff;
2644 vec->length= length;
2645
2646 for(i=0; i<length; i++) coeff[i]= 0.0;
2647
2648 for(i=0; i<a->length; i++)
2649 {
2650 coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
2651 }
2652
2653 return vec;
2654}
2655
d4e24275
MN
2656void sws_shiftVec(SwsVector *a, int shift){
2657 SwsVector *shifted= sws_getShiftedVec(a, shift);
94c4def2 2658 av_free(a->coeff);
5cebb24b
MN
2659 a->coeff= shifted->coeff;
2660 a->length= shifted->length;
94c4def2 2661 av_free(shifted);
5cebb24b
MN
2662}
2663
d4e24275
MN
2664void sws_addVec(SwsVector *a, SwsVector *b){
2665 SwsVector *sum= sws_sumVec(a, b);
94c4def2 2666 av_free(a->coeff);
5cebb24b
MN
2667 a->coeff= sum->coeff;
2668 a->length= sum->length;
94c4def2 2669 av_free(sum);
5cebb24b
MN
2670}
2671
d4e24275
MN
2672void sws_subVec(SwsVector *a, SwsVector *b){
2673 SwsVector *diff= sws_diffVec(a, b);
94c4def2 2674 av_free(a->coeff);
5cebb24b
MN
2675 a->coeff= diff->coeff;
2676 a->length= diff->length;
94c4def2 2677 av_free(diff);
5cebb24b
MN
2678}
2679
d4e24275
MN
2680void sws_convVec(SwsVector *a, SwsVector *b){
2681 SwsVector *conv= sws_getConvVec(a, b);
94c4def2 2682 av_free(a->coeff);
5cebb24b
MN
2683 a->coeff= conv->coeff;
2684 a->length= conv->length;
94c4def2 2685 av_free(conv);
5cebb24b
MN
2686}
2687
d4e24275 2688SwsVector *sws_cloneVec(SwsVector *a){
8dfe9094 2689 double *coeff= av_malloc(a->length*sizeof(double));
5cebb24b 2690 int i;
94c4def2 2691 SwsVector *vec= av_malloc(sizeof(SwsVector));
5cebb24b
MN
2692
2693 vec->coeff= coeff;
2694 vec->length= a->length;
2695
2696 for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];
2697
2698 return vec;
2699}
2700
d4e24275 2701void sws_printVec(SwsVector *a){
c7f822d9
MN
2702 int i;
2703 double max=0;
2704 double min=0;
2705 double range;
2706
2707 for(i=0; i<a->length; i++)
2708 if(a->coeff[i]>max) max= a->coeff[i];
2709
2710 for(i=0; i<a->length; i++)
2711 if(a->coeff[i]<min) min= a->coeff[i];
2712
2713 range= max - min;
2714
2715 for(i=0; i<a->length; i++)
2716 {
2717 int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
0d9f3d85
A
2718 MSG_DBG2("%1.3f ", a->coeff[i]);
2719 for(;x>0; x--) MSG_DBG2(" ");
2720 MSG_DBG2("|\n");
c7f822d9
MN
2721 }
2722}
2723
d4e24275 2724void sws_freeVec(SwsVector *a){
c7f822d9 2725 if(!a) return;
94c4def2 2726 av_free(a->coeff);
c7f822d9
MN
2727 a->coeff=NULL;
2728 a->length=0;
94c4def2 2729 av_free(a);
c7f822d9
MN
2730}
2731
e21206a8
MN
2732void sws_freeFilter(SwsFilter *filter){
2733 if(!filter) return;
2734
2735 if(filter->lumH) sws_freeVec(filter->lumH);
2736 if(filter->lumV) sws_freeVec(filter->lumV);
2737 if(filter->chrH) sws_freeVec(filter->chrH);
2738 if(filter->chrV) sws_freeVec(filter->chrV);
94c4def2 2739 av_free(filter);
e21206a8
MN
2740}
2741
2742
d4e24275 2743void sws_freeContext(SwsContext *c){
c7f822d9 2744 int i;
c7f822d9
MN
2745 if(!c) return;
2746
2747 if(c->lumPixBuf)
2748 {
6c7506de 2749 for(i=0; i<c->vLumBufSize; i++)
c7f822d9 2750 {
94c4def2 2751 av_free(c->lumPixBuf[i]);
c7f822d9
MN
2752 c->lumPixBuf[i]=NULL;
2753 }
94c4def2 2754 av_free(c->lumPixBuf);
c7f822d9
MN
2755 c->lumPixBuf=NULL;
2756 }
2757
2758 if(c->chrPixBuf)
2759 {
6c7506de 2760 for(i=0; i<c->vChrBufSize; i++)
c7f822d9 2761 {
94c4def2 2762 av_free(c->chrPixBuf[i]);
c7f822d9
MN
2763 c->chrPixBuf[i]=NULL;
2764 }
94c4def2 2765 av_free(c->chrPixBuf);
c7f822d9
MN
2766 c->chrPixBuf=NULL;
2767 }
2768
94c4def2 2769 av_free(c->vLumFilter);
c7f822d9 2770 c->vLumFilter = NULL;
94c4def2 2771 av_free(c->vChrFilter);
c7f822d9 2772 c->vChrFilter = NULL;
94c4def2 2773 av_free(c->hLumFilter);
c7f822d9 2774 c->hLumFilter = NULL;
94c4def2 2775 av_free(c->hChrFilter);
c7f822d9 2776 c->hChrFilter = NULL;
d33d485e 2777#ifdef HAVE_ALTIVEC
94c4def2 2778 av_free(c->vYCoeffsBank);
d33d485e 2779 c->vYCoeffsBank = NULL;
94c4def2 2780 av_free(c->vCCoeffsBank);
d33d485e
AC
2781 c->vCCoeffsBank = NULL;
2782#endif
c7f822d9 2783
94c4def2 2784 av_free(c->vLumFilterPos);
c7f822d9 2785 c->vLumFilterPos = NULL;
94c4def2 2786 av_free(c->vChrFilterPos);
c7f822d9 2787 c->vChrFilterPos = NULL;
94c4def2 2788 av_free(c->hLumFilterPos);
c7f822d9 2789 c->hLumFilterPos = NULL;
94c4def2 2790 av_free(c->hChrFilterPos);
c7f822d9
MN
2791 c->hChrFilterPos = NULL;
2792
9bde778e 2793#if defined(ARCH_X86) && defined(CONFIG_GPL)
0ce5275d 2794#ifdef MAP_ANONYMOUS
38d5c282
AJ
2795 if(c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);
2796 if(c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);
2797#else
94c4def2
LA
2798 av_free(c->funnyYCode);
2799 av_free(c->funnyUVCode);
38d5c282
AJ
2800#endif
2801 c->funnyYCode=NULL;
2802 c->funnyUVCode=NULL;
3d6a30d9 2803#endif /* defined(ARCH_X86) */
38d5c282 2804
94c4def2 2805 av_free(c->lumMmx2Filter);
b7dc6f66 2806 c->lumMmx2Filter=NULL;
94c4def2 2807 av_free(c->chrMmx2Filter);
b7dc6f66 2808 c->chrMmx2Filter=NULL;
94c4def2 2809 av_free(c->lumMmx2FilterPos);
b7dc6f66 2810 c->lumMmx2FilterPos=NULL;
94c4def2 2811 av_free(c->chrMmx2FilterPos);
b7dc6f66 2812 c->chrMmx2FilterPos=NULL;
94c4def2 2813 av_free(c->yuvTable);
cf7d1c1a 2814 c->yuvTable=NULL;
b7dc6f66 2815
94c4def2 2816 av_free(c);
c7f822d9
MN
2817}
2818
22e46959
VP
2819/**
2820 * Checks if context is valid or reallocs a new one instead.
2821 * If context is NULL, just calls sws_getContext() to get a new one.
2822 * Otherwise, checks if the parameters are the same already saved in context.
2823 * If that is the case, returns the current context.
2824 * Otherwise, frees context and gets a new one.
2825 *
2826 * Be warned that srcFilter, dstFilter are not checked, they are
2827 * asumed to remain valid.
2828 */
2829struct SwsContext *sws_getCachedContext(struct SwsContext *context,
2830 int srcW, int srcH, int srcFormat,
2831 int dstW, int dstH, int dstFormat, int flags,
2832 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)
2833{
2834 if (context != NULL) {
2835 if ((context->srcW != srcW) || (context->srcH != srcH) ||
2836 (context->srcFormat != srcFormat) ||
2837 (context->dstW != dstW) || (context->dstH != dstH) ||
2838 (context->dstFormat != dstFormat) || (context->flags != flags) ||
2839 (context->param != param))
2840 {
2841 sws_freeContext(context);
2842 context = NULL;
2843 }
2844 }
2845 if (context == NULL) {
2846 return sws_getContext(srcW, srcH, srcFormat,
2847 dstW, dstH, dstFormat, flags,
2848 srcFilter, dstFilter, param);
2849 }
2850 return context;
2851}
2852