2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #define _DEFAULT_SOURCE
24 #define _SVID_SOURCE // needed for MAP_ANONYMOUS
25 #define _DARWIN_C_SOURCE // needed for MAP_ANON
32 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
33 #define MAP_ANONYMOUS MAP_ANON
37 #define WIN32_LEAN_AND_MEAN
41 #include "libavutil/attributes.h"
42 #include "libavutil/avassert.h"
43 #include "libavutil/avutil.h"
44 #include "libavutil/bswap.h"
45 #include "libavutil/cpu.h"
46 #include "libavutil/imgutils.h"
47 #include "libavutil/intreadwrite.h"
48 #include "libavutil/libm.h"
49 #include "libavutil/mathematics.h"
50 #include "libavutil/opt.h"
51 #include "libavutil/pixdesc.h"
52 #include "libavutil/aarch64/cpu.h"
53 #include "libavutil/ppc/cpu.h"
54 #include "libavutil/x86/asm.h"
55 #include "libavutil/x86/cpu.h"
57 // We have to implement deprecated functions until they are removed, this is the
58 // simplest way to prevent warnings
59 #undef attribute_deprecated
60 #define attribute_deprecated
64 #include "swscale_internal.h"
66 #if !FF_API_SWS_VECTOR
67 static SwsVector *sws_getIdentityVec(void);
68 static void sws_addVec(SwsVector *a, SwsVector *b);
69 static void sws_shiftVec(SwsVector *a, int shift);
70 static void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
73 static void handle_formats(SwsContext *c);
75 unsigned swscale_version(void)
77 av_assert0(LIBSWSCALE_VERSION_MICRO >= 100);
78 return LIBSWSCALE_VERSION_INT;
81 const char *swscale_configuration(void)
83 return FFMPEG_CONFIGURATION;
86 const char *swscale_license(void)
88 #define LICENSE_PREFIX "libswscale license: "
89 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
92 typedef struct FormatEntry {
93 uint8_t is_supported_in :1;
94 uint8_t is_supported_out :1;
95 uint8_t is_supported_endianness :1;
98 static const FormatEntry format_entries[AV_PIX_FMT_NB] = {
99 [AV_PIX_FMT_YUV420P] = { 1, 1 },
100 [AV_PIX_FMT_YUYV422] = { 1, 1 },
101 [AV_PIX_FMT_RGB24] = { 1, 1 },
102 [AV_PIX_FMT_BGR24] = { 1, 1 },
103 [AV_PIX_FMT_YUV422P] = { 1, 1 },
104 [AV_PIX_FMT_YUV444P] = { 1, 1 },
105 [AV_PIX_FMT_YUV410P] = { 1, 1 },
106 [AV_PIX_FMT_YUV411P] = { 1, 1 },
107 [AV_PIX_FMT_GRAY8] = { 1, 1 },
108 [AV_PIX_FMT_MONOWHITE] = { 1, 1 },
109 [AV_PIX_FMT_MONOBLACK] = { 1, 1 },
110 [AV_PIX_FMT_PAL8] = { 1, 0 },
111 [AV_PIX_FMT_YUVJ420P] = { 1, 1 },
112 [AV_PIX_FMT_YUVJ411P] = { 1, 1 },
113 [AV_PIX_FMT_YUVJ422P] = { 1, 1 },
114 [AV_PIX_FMT_YUVJ444P] = { 1, 1 },
115 [AV_PIX_FMT_YVYU422] = { 1, 1 },
116 [AV_PIX_FMT_UYVY422] = { 1, 1 },
117 [AV_PIX_FMT_UYYVYY411] = { 0, 0 },
118 [AV_PIX_FMT_BGR8] = { 1, 1 },
119 [AV_PIX_FMT_BGR4] = { 0, 1 },
120 [AV_PIX_FMT_BGR4_BYTE] = { 1, 1 },
121 [AV_PIX_FMT_RGB8] = { 1, 1 },
122 [AV_PIX_FMT_RGB4] = { 0, 1 },
123 [AV_PIX_FMT_RGB4_BYTE] = { 1, 1 },
124 [AV_PIX_FMT_NV12] = { 1, 1 },
125 [AV_PIX_FMT_NV21] = { 1, 1 },
126 [AV_PIX_FMT_ARGB] = { 1, 1 },
127 [AV_PIX_FMT_RGBA] = { 1, 1 },
128 [AV_PIX_FMT_ABGR] = { 1, 1 },
129 [AV_PIX_FMT_BGRA] = { 1, 1 },
130 [AV_PIX_FMT_0RGB] = { 1, 1 },
131 [AV_PIX_FMT_RGB0] = { 1, 1 },
132 [AV_PIX_FMT_0BGR] = { 1, 1 },
133 [AV_PIX_FMT_BGR0] = { 1, 1 },
134 [AV_PIX_FMT_GRAY10BE] = { 1, 1 },
135 [AV_PIX_FMT_GRAY10LE] = { 1, 1 },
136 [AV_PIX_FMT_GRAY12BE] = { 1, 1 },
137 [AV_PIX_FMT_GRAY12LE] = { 1, 1 },
138 [AV_PIX_FMT_GRAY16BE] = { 1, 1 },
139 [AV_PIX_FMT_GRAY16LE] = { 1, 1 },
140 [AV_PIX_FMT_YUV440P] = { 1, 1 },
141 [AV_PIX_FMT_YUVJ440P] = { 1, 1 },
142 [AV_PIX_FMT_YUV440P10LE] = { 1, 1 },
143 [AV_PIX_FMT_YUV440P10BE] = { 1, 1 },
144 [AV_PIX_FMT_YUV440P12LE] = { 1, 1 },
145 [AV_PIX_FMT_YUV440P12BE] = { 1, 1 },
146 [AV_PIX_FMT_YUVA420P] = { 1, 1 },
147 [AV_PIX_FMT_YUVA422P] = { 1, 1 },
148 [AV_PIX_FMT_YUVA444P] = { 1, 1 },
149 [AV_PIX_FMT_YUVA420P9BE] = { 1, 1 },
150 [AV_PIX_FMT_YUVA420P9LE] = { 1, 1 },
151 [AV_PIX_FMT_YUVA422P9BE] = { 1, 1 },
152 [AV_PIX_FMT_YUVA422P9LE] = { 1, 1 },
153 [AV_PIX_FMT_YUVA444P9BE] = { 1, 1 },
154 [AV_PIX_FMT_YUVA444P9LE] = { 1, 1 },
155 [AV_PIX_FMT_YUVA420P10BE]= { 1, 1 },
156 [AV_PIX_FMT_YUVA420P10LE]= { 1, 1 },
157 [AV_PIX_FMT_YUVA422P10BE]= { 1, 1 },
158 [AV_PIX_FMT_YUVA422P10LE]= { 1, 1 },
159 [AV_PIX_FMT_YUVA444P10BE]= { 1, 1 },
160 [AV_PIX_FMT_YUVA444P10LE]= { 1, 1 },
161 [AV_PIX_FMT_YUVA420P16BE]= { 1, 1 },
162 [AV_PIX_FMT_YUVA420P16LE]= { 1, 1 },
163 [AV_PIX_FMT_YUVA422P16BE]= { 1, 1 },
164 [AV_PIX_FMT_YUVA422P16LE]= { 1, 1 },
165 [AV_PIX_FMT_YUVA444P16BE]= { 1, 1 },
166 [AV_PIX_FMT_YUVA444P16LE]= { 1, 1 },
167 [AV_PIX_FMT_RGB48BE] = { 1, 1 },
168 [AV_PIX_FMT_RGB48LE] = { 1, 1 },
169 [AV_PIX_FMT_RGBA64BE] = { 1, 1, 1 },
170 [AV_PIX_FMT_RGBA64LE] = { 1, 1, 1 },
171 [AV_PIX_FMT_RGB565BE] = { 1, 1 },
172 [AV_PIX_FMT_RGB565LE] = { 1, 1 },
173 [AV_PIX_FMT_RGB555BE] = { 1, 1 },
174 [AV_PIX_FMT_RGB555LE] = { 1, 1 },
175 [AV_PIX_FMT_BGR565BE] = { 1, 1 },
176 [AV_PIX_FMT_BGR565LE] = { 1, 1 },
177 [AV_PIX_FMT_BGR555BE] = { 1, 1 },
178 [AV_PIX_FMT_BGR555LE] = { 1, 1 },
179 [AV_PIX_FMT_YUV420P16LE] = { 1, 1 },
180 [AV_PIX_FMT_YUV420P16BE] = { 1, 1 },
181 [AV_PIX_FMT_YUV422P16LE] = { 1, 1 },
182 [AV_PIX_FMT_YUV422P16BE] = { 1, 1 },
183 [AV_PIX_FMT_YUV444P16LE] = { 1, 1 },
184 [AV_PIX_FMT_YUV444P16BE] = { 1, 1 },
185 [AV_PIX_FMT_RGB444LE] = { 1, 1 },
186 [AV_PIX_FMT_RGB444BE] = { 1, 1 },
187 [AV_PIX_FMT_BGR444LE] = { 1, 1 },
188 [AV_PIX_FMT_BGR444BE] = { 1, 1 },
189 [AV_PIX_FMT_YA8] = { 1, 1 },
190 [AV_PIX_FMT_YA16BE] = { 1, 0 },
191 [AV_PIX_FMT_YA16LE] = { 1, 0 },
192 [AV_PIX_FMT_BGR48BE] = { 1, 1 },
193 [AV_PIX_FMT_BGR48LE] = { 1, 1 },
194 [AV_PIX_FMT_BGRA64BE] = { 1, 1, 1 },
195 [AV_PIX_FMT_BGRA64LE] = { 1, 1, 1 },
196 [AV_PIX_FMT_YUV420P9BE] = { 1, 1 },
197 [AV_PIX_FMT_YUV420P9LE] = { 1, 1 },
198 [AV_PIX_FMT_YUV420P10BE] = { 1, 1 },
199 [AV_PIX_FMT_YUV420P10LE] = { 1, 1 },
200 [AV_PIX_FMT_YUV420P12BE] = { 1, 1 },
201 [AV_PIX_FMT_YUV420P12LE] = { 1, 1 },
202 [AV_PIX_FMT_YUV420P14BE] = { 1, 1 },
203 [AV_PIX_FMT_YUV420P14LE] = { 1, 1 },
204 [AV_PIX_FMT_YUV422P9BE] = { 1, 1 },
205 [AV_PIX_FMT_YUV422P9LE] = { 1, 1 },
206 [AV_PIX_FMT_YUV422P10BE] = { 1, 1 },
207 [AV_PIX_FMT_YUV422P10LE] = { 1, 1 },
208 [AV_PIX_FMT_YUV422P12BE] = { 1, 1 },
209 [AV_PIX_FMT_YUV422P12LE] = { 1, 1 },
210 [AV_PIX_FMT_YUV422P14BE] = { 1, 1 },
211 [AV_PIX_FMT_YUV422P14LE] = { 1, 1 },
212 [AV_PIX_FMT_YUV444P9BE] = { 1, 1 },
213 [AV_PIX_FMT_YUV444P9LE] = { 1, 1 },
214 [AV_PIX_FMT_YUV444P10BE] = { 1, 1 },
215 [AV_PIX_FMT_YUV444P10LE] = { 1, 1 },
216 [AV_PIX_FMT_YUV444P12BE] = { 1, 1 },
217 [AV_PIX_FMT_YUV444P12LE] = { 1, 1 },
218 [AV_PIX_FMT_YUV444P14BE] = { 1, 1 },
219 [AV_PIX_FMT_YUV444P14LE] = { 1, 1 },
220 [AV_PIX_FMT_GBRP] = { 1, 1 },
221 [AV_PIX_FMT_GBRP9LE] = { 1, 1 },
222 [AV_PIX_FMT_GBRP9BE] = { 1, 1 },
223 [AV_PIX_FMT_GBRP10LE] = { 1, 1 },
224 [AV_PIX_FMT_GBRP10BE] = { 1, 1 },
225 [AV_PIX_FMT_GBRAP10LE] = { 1, 1 },
226 [AV_PIX_FMT_GBRAP10BE] = { 1, 1 },
227 [AV_PIX_FMT_GBRP12LE] = { 1, 1 },
228 [AV_PIX_FMT_GBRP12BE] = { 1, 1 },
229 [AV_PIX_FMT_GBRAP12LE] = { 1, 1 },
230 [AV_PIX_FMT_GBRAP12BE] = { 1, 1 },
231 [AV_PIX_FMT_GBRP14LE] = { 1, 1 },
232 [AV_PIX_FMT_GBRP14BE] = { 1, 1 },
233 [AV_PIX_FMT_GBRP16LE] = { 1, 1 },
234 [AV_PIX_FMT_GBRP16BE] = { 1, 1 },
235 [AV_PIX_FMT_GBRAP] = { 1, 1 },
236 [AV_PIX_FMT_GBRAP16LE] = { 1, 1 },
237 [AV_PIX_FMT_GBRAP16BE] = { 1, 1 },
238 [AV_PIX_FMT_BAYER_BGGR8] = { 1, 0 },
239 [AV_PIX_FMT_BAYER_RGGB8] = { 1, 0 },
240 [AV_PIX_FMT_BAYER_GBRG8] = { 1, 0 },
241 [AV_PIX_FMT_BAYER_GRBG8] = { 1, 0 },
242 [AV_PIX_FMT_BAYER_BGGR16LE] = { 1, 0 },
243 [AV_PIX_FMT_BAYER_BGGR16BE] = { 1, 0 },
244 [AV_PIX_FMT_BAYER_RGGB16LE] = { 1, 0 },
245 [AV_PIX_FMT_BAYER_RGGB16BE] = { 1, 0 },
246 [AV_PIX_FMT_BAYER_GBRG16LE] = { 1, 0 },
247 [AV_PIX_FMT_BAYER_GBRG16BE] = { 1, 0 },
248 [AV_PIX_FMT_BAYER_GRBG16LE] = { 1, 0 },
249 [AV_PIX_FMT_BAYER_GRBG16BE] = { 1, 0 },
250 [AV_PIX_FMT_XYZ12BE] = { 1, 1, 1 },
251 [AV_PIX_FMT_XYZ12LE] = { 1, 1, 1 },
252 [AV_PIX_FMT_AYUV64LE] = { 1, 1},
253 [AV_PIX_FMT_P010LE] = { 1, 1 },
254 [AV_PIX_FMT_P010BE] = { 1, 1 },
257 int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
259 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
260 format_entries[pix_fmt].is_supported_in : 0;
263 int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
265 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
266 format_entries[pix_fmt].is_supported_out : 0;
269 int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
271 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
272 format_entries[pix_fmt].is_supported_endianness : 0;
275 static double getSplineCoeff(double a, double b, double c, double d,
279 return ((d * dist + c) * dist + b) * dist + a;
281 return getSplineCoeff(0.0,
282 b + 2.0 * c + 3.0 * d,
284 -b - 3.0 * c - 6.0 * d,
288 static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
290 if (pos == -1 || pos <= -513) {
291 pos = (128 << chr_subsample) - 128;
293 pos += 128; // relative to ideal left edge
294 return pos >> chr_subsample;
298 int flag; ///< flag associated to the algorithm
299 const char *description; ///< human-readable description
300 int size_factor; ///< size factor used when initing the filters
303 static const ScaleAlgorithm scale_algorithms[] = {
304 { SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ },
305 { SWS_BICUBIC, "bicubic", 4 },
306 { SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 },
307 { SWS_BILINEAR, "bilinear", 2 },
308 { SWS_FAST_BILINEAR, "fast bilinear", -1 },
309 { SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ },
310 { SWS_LANCZOS, "Lanczos", -1 /* custom */ },
311 { SWS_POINT, "nearest neighbor / point", -1 },
312 { SWS_SINC, "sinc", 20 /* infinite ;) */ },
313 { SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ },
314 { SWS_X, "experimental", 8 },
317 static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
318 int *outFilterSize, int xInc, int srcW,
319 int dstW, int filterAlign, int one,
320 int flags, int cpu_flags,
321 SwsVector *srcFilter, SwsVector *dstFilter,
322 double param[2], int srcPos, int dstPos)
328 int64_t *filter = NULL;
329 int64_t *filter2 = NULL;
330 const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
333 emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
335 // NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
336 FF_ALLOC_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail);
338 if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
341 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter,
342 dstW, sizeof(*filter) * filterSize, fail);
344 for (i = 0; i < dstW; i++) {
345 filter[i * filterSize] = fone;
348 } else if (flags & SWS_POINT) { // lame looking point sampling mode
352 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
353 dstW, sizeof(*filter) * filterSize, fail);
355 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
356 for (i = 0; i < dstW; i++) {
357 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
359 (*filterPos)[i] = xx;
363 } else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) ||
364 (flags & SWS_FAST_BILINEAR)) { // bilinear upscale
368 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
369 dstW, sizeof(*filter) * filterSize, fail);
371 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
372 for (i = 0; i < dstW; i++) {
373 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
376 (*filterPos)[i] = xx;
377 // bilinear upscale / linear interpolate / area averaging
378 for (j = 0; j < filterSize; j++) {
379 int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
382 filter[i * filterSize + j] = coeff;
391 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
392 if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) {
393 sizeFactor = scale_algorithms[i].size_factor;
397 if (flags & SWS_LANCZOS)
398 sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
399 av_assert0(sizeFactor > 0);
402 filterSize = 1 + sizeFactor; // upscale
404 filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
406 filterSize = FFMIN(filterSize, srcW - 2);
407 filterSize = FFMAX(filterSize, 1);
409 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
410 dstW, sizeof(*filter) * filterSize, fail);
412 xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
413 for (i = 0; i < dstW; i++) {
414 int xx = (xDstInSrc - (filterSize - 2) * (1LL<<16)) / (1 << 17);
416 (*filterPos)[i] = xx;
417 for (j = 0; j < filterSize; j++) {
418 int64_t d = (FFABS(((int64_t)xx * (1 << 17)) - xDstInSrc)) << 13;
424 floatd = d * (1.0 / (1 << 30));
426 if (flags & SWS_BICUBIC) {
427 int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
428 int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
430 if (d >= 1LL << 31) {
433 int64_t dd = (d * d) >> 30;
434 int64_t ddd = (dd * d) >> 30;
437 coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
438 (-18 * (1 << 24) + 12 * B + 6 * C) * dd +
439 (6 * (1 << 24) - 2 * B) * (1 << 30);
441 coeff = (-B - 6 * C) * ddd +
442 (6 * B + 30 * C) * dd +
443 (-12 * B - 48 * C) * d +
444 (8 * B + 24 * C) * (1 << 30);
446 coeff /= (1LL<<54)/fone;
449 else if (flags & SWS_X) {
450 double p = param ? param * 0.01 : 0.3;
451 coeff = d ? sin(d * M_PI) / (d * M_PI) : 1.0;
452 coeff *= pow(2.0, -p * d * d);
455 else if (flags & SWS_X) {
456 double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
460 c = cos(floatd * M_PI);
467 coeff = (c * 0.5 + 0.5) * fone;
468 } else if (flags & SWS_AREA) {
469 int64_t d2 = d - (1 << 29);
470 if (d2 * xInc < -(1LL << (29 + 16)))
471 coeff = 1.0 * (1LL << (30 + 16));
472 else if (d2 * xInc < (1LL << (29 + 16)))
473 coeff = -d2 * xInc + (1LL << (29 + 16));
476 coeff *= fone >> (30 + 16);
477 } else if (flags & SWS_GAUSS) {
478 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
479 coeff = exp2(-p * floatd * floatd) * fone;
480 } else if (flags & SWS_SINC) {
481 coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone;
482 } else if (flags & SWS_LANCZOS) {
483 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
484 coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) /
485 (floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
488 } else if (flags & SWS_BILINEAR) {
489 coeff = (1 << 30) - d;
493 } else if (flags & SWS_SPLINE) {
494 double p = -2.196152422706632;
495 coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone;
500 filter[i * filterSize + j] = coeff;
503 xDstInSrc += 2 * xInc;
507 /* apply src & dst Filter to filter -> filter2
510 av_assert0(filterSize > 0);
511 filter2Size = filterSize;
513 filter2Size += srcFilter->length - 1;
515 filter2Size += dstFilter->length - 1;
516 av_assert0(filter2Size > 0);
517 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter2, dstW, filter2Size * sizeof(*filter2), fail);
519 for (i = 0; i < dstW; i++) {
523 for (k = 0; k < srcFilter->length; k++) {
524 for (j = 0; j < filterSize; j++)
525 filter2[i * filter2Size + k + j] +=
526 srcFilter->coeff[k] * filter[i * filterSize + j];
529 for (j = 0; j < filterSize; j++)
530 filter2[i * filter2Size + j] = filter[i * filterSize + j];
534 (*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
538 /* try to reduce the filter-size (step1 find size and shift left) */
539 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
541 for (i = dstW - 1; i >= 0; i--) {
542 int min = filter2Size;
544 int64_t cutOff = 0.0;
546 /* get rid of near zero elements on the left by shifting left */
547 for (j = 0; j < filter2Size; j++) {
549 cutOff += FFABS(filter2[i * filter2Size]);
551 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
554 /* preserve monotonicity because the core can't handle the
555 * filter otherwise */
556 if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1])
559 // move filter coefficients left
560 for (k = 1; k < filter2Size; k++)
561 filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
562 filter2[i * filter2Size + k - 1] = 0;
567 /* count near zeros on the right */
568 for (j = filter2Size - 1; j > 0; j--) {
569 cutOff += FFABS(filter2[i * filter2Size + j]);
571 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
576 if (min > minFilterSize)
580 if (PPC_ALTIVEC(cpu_flags)) {
581 // we can handle the special case 4, so we don't want to go the full 8
582 if (minFilterSize < 5)
585 /* We really don't want to waste our time doing useless computation, so
586 * fall back on the scalar C code for very small filters.
587 * Vectorizing is worth it only if you have a decent-sized vector. */
588 if (minFilterSize < 3)
592 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
593 // special case for unscaled vertical filtering
594 if (minFilterSize == 1 && filterAlign == 2)
598 av_assert0(minFilterSize > 0);
599 filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
600 av_assert0(filterSize > 0);
601 filter = av_malloc_array(dstW, filterSize * sizeof(*filter));
604 if (filterSize >= MAX_FILTER_SIZE * 16 /
605 ((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16)) {
606 ret = RETCODE_USE_CASCADE;
609 *outFilterSize = filterSize;
611 if (flags & SWS_PRINT_INFO)
612 av_log(NULL, AV_LOG_VERBOSE,
613 "SwScaler: reducing / aligning filtersize %d -> %d\n",
614 filter2Size, filterSize);
615 /* try to reduce the filter-size (step2 reduce it) */
616 for (i = 0; i < dstW; i++) {
619 for (j = 0; j < filterSize; j++) {
620 if (j >= filter2Size)
621 filter[i * filterSize + j] = 0;
623 filter[i * filterSize + j] = filter2[i * filter2Size + j];
624 if ((flags & SWS_BITEXACT) && j >= minFilterSize)
625 filter[i * filterSize + j] = 0;
629 // FIXME try to align filterPos if possible
632 for (i = 0; i < dstW; i++) {
634 if ((*filterPos)[i] < 0) {
635 // move filter coefficients left to compensate for filterPos
636 for (j = 1; j < filterSize; j++) {
637 int left = FFMAX(j + (*filterPos)[i], 0);
638 filter[i * filterSize + left] += filter[i * filterSize + j];
639 filter[i * filterSize + j] = 0;
644 if ((*filterPos)[i] + filterSize > srcW) {
645 int shift = (*filterPos)[i] + FFMIN(filterSize - srcW, 0);
648 for (j = filterSize - 1; j >= 0; j--) {
649 if ((*filterPos)[i] + j >= srcW) {
650 acc += filter[i * filterSize + j];
651 filter[i * filterSize + j] = 0;
654 for (j = filterSize - 1; j >= 0; j--) {
656 filter[i * filterSize + j] = 0;
658 filter[i * filterSize + j] = filter[i * filterSize + j - shift];
662 (*filterPos)[i]-= shift;
663 filter[i * filterSize + srcW - 1 - (*filterPos)[i]] += acc;
665 av_assert0((*filterPos)[i] >= 0);
666 av_assert0((*filterPos)[i] < srcW);
667 if ((*filterPos)[i] + filterSize > srcW) {
668 for (j = 0; j < filterSize; j++) {
669 av_assert0((*filterPos)[i] + j < srcW || !filter[i * filterSize + j]);
674 // Note the +1 is for the MMX scaler which reads over the end
675 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
676 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, *outFilter,
677 (dstW + 3), *outFilterSize * sizeof(int16_t), fail);
679 /* normalize & store in outFilter */
680 for (i = 0; i < dstW; i++) {
685 for (j = 0; j < filterSize; j++) {
686 sum += filter[i * filterSize + j];
688 sum = (sum + one / 2) / one;
690 av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n");
693 for (j = 0; j < *outFilterSize; j++) {
694 int64_t v = filter[i * filterSize + j] + error;
695 int intV = ROUNDED_DIV(v, sum);
696 (*outFilter)[i * (*outFilterSize) + j] = intV;
697 error = v - intV * sum;
701 (*filterPos)[dstW + 0] =
702 (*filterPos)[dstW + 1] =
703 (*filterPos)[dstW + 2] = (*filterPos)[dstW - 1]; /* the MMX/SSE scaler will
704 * read over the end */
705 for (i = 0; i < *outFilterSize; i++) {
706 int k = (dstW - 1) * (*outFilterSize) + i;
707 (*outFilter)[k + 1 * (*outFilterSize)] =
708 (*outFilter)[k + 2 * (*outFilterSize)] =
709 (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
716 av_log(NULL, ret == RETCODE_USE_CASCADE ? AV_LOG_DEBUG : AV_LOG_ERROR, "sws: initFilter failed\n");
722 static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
724 int64_t W, V, Z, Cy, Cu, Cv;
725 int64_t vr = table[0];
726 int64_t ub = table[1];
727 int64_t ug = -table[2];
728 int64_t vg = -table[3];
731 uint8_t *p = (uint8_t*)c->input_rgb2yuv_table;
733 static const int8_t map[] = {
734 BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX,
735 RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX,
736 RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX,
737 BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX,
738 BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX,
739 RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX,
740 RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX,
741 BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX,
742 BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX,
743 RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX,
744 RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX,
745 BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX,
746 RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX,
747 BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX,
748 GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 ,
749 -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX,
750 RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX,
751 BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX,
752 GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 ,
753 -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX,
754 RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX,
755 BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX,
756 GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 ,
757 -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23
758 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24
759 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25
760 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26
761 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27
762 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28
763 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29
764 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30
765 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31
766 BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32
767 BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33
768 BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34
771 dstRange = 0; //FIXME range = 1 is handled elsewhere
781 W = ROUNDED_DIV(ONE*ONE*ug, ub);
782 V = ROUNDED_DIV(ONE*ONE*vg, vr);
785 Cy = ROUNDED_DIV(cy*Z, ONE);
786 Cu = ROUNDED_DIV(ub*Z, ONE);
787 Cv = ROUNDED_DIV(vr*Z, ONE);
789 c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy);
790 c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cy);
791 c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy);
793 c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu);
794 c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cu);
795 c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu);
797 c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv);
798 c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cv);
799 c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv);
801 if(/*!dstRange && */!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) {
802 c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
803 c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
804 c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
805 c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
806 c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
807 c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
808 c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
809 c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
810 c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
812 for(i=0; i<FF_ARRAY_ELEMS(map); i++)
813 AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0);
816 static void fill_xyztables(struct SwsContext *c)
819 double xyzgamma = XYZ_GAMMA;
820 double rgbgamma = 1.0 / RGB_GAMMA;
821 double xyzgammainv = 1.0 / XYZ_GAMMA;
822 double rgbgammainv = RGB_GAMMA;
823 static const int16_t xyz2rgb_matrix[3][4] = {
824 {13270, -6295, -2041},
826 { 228, -835, 4329} };
827 static const int16_t rgb2xyz_matrix[3][4] = {
831 static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
833 memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
834 memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix));
835 c->xyzgamma = xyzgamma_tab;
836 c->rgbgamma = rgbgamma_tab;
837 c->xyzgammainv = xyzgammainv_tab;
838 c->rgbgammainv = rgbgammainv_tab;
840 if (rgbgamma_tab[4095])
843 /* set gamma vectors */
844 for (i = 0; i < 4096; i++) {
845 xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
846 rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
847 xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
848 rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
852 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
853 int srcRange, const int table[4], int dstRange,
854 int brightness, int contrast, int saturation)
856 const AVPixFmtDescriptor *desc_dst;
857 const AVPixFmtDescriptor *desc_src;
861 desc_dst = av_pix_fmt_desc_get(c->dstFormat);
862 desc_src = av_pix_fmt_desc_get(c->srcFormat);
864 if(!isYUV(c->dstFormat) && !isGray(c->dstFormat))
866 if(!isYUV(c->srcFormat) && !isGray(c->srcFormat))
869 if (c->srcRange != srcRange ||
870 c->dstRange != dstRange ||
871 c->brightness != brightness ||
872 c->contrast != contrast ||
873 c->saturation != saturation ||
874 memcmp(c->srcColorspaceTable, inv_table, sizeof(int) * 4) ||
875 memcmp(c->dstColorspaceTable, table, sizeof(int) * 4)
879 memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4);
880 memmove(c->dstColorspaceTable, table, sizeof(int) * 4);
884 c->brightness = brightness;
885 c->contrast = contrast;
886 c->saturation = saturation;
887 c->srcRange = srcRange;
888 c->dstRange = dstRange;
890 //The srcBpc check is possibly wrong but we seem to lack a definitive reference to test this
891 //and what we have in ticket 2939 looks better with this check
892 if (need_reinit && (c->srcBpc == 8 || !isYUV(c->srcFormat)))
893 ff_sws_init_range_convert(c);
895 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
896 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
898 if (c->cascaded_context[c->cascaded_mainindex])
899 return sws_setColorspaceDetails(c->cascaded_context[c->cascaded_mainindex],inv_table, srcRange,table, dstRange, brightness, contrast, saturation);
904 if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat))) {
905 if (!c->cascaded_context[0] &&
906 memcmp(c->dstColorspaceTable, c->srcColorspaceTable, sizeof(int) * 4) &&
907 c->srcW && c->srcH && c->dstW && c->dstH) {
908 enum AVPixelFormat tmp_format;
909 int tmp_width, tmp_height;
915 av_log(c, AV_LOG_VERBOSE, "YUV color matrix differs for YUV->YUV, using intermediate RGB to convert\n");
917 if (isNBPS(c->dstFormat) || is16BPS(c->dstFormat)) {
918 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
919 tmp_format = AV_PIX_FMT_BGRA64;
921 tmp_format = AV_PIX_FMT_BGR48;
924 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
925 tmp_format = AV_PIX_FMT_BGRA;
927 tmp_format = AV_PIX_FMT_BGR24;
931 if (srcW*srcH > dstW*dstH) {
939 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
940 tmp_width, tmp_height, tmp_format, 64);
944 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, c->srcFormat,
945 tmp_width, tmp_height, tmp_format,
947 if (!c->cascaded_context[0])
950 c->cascaded_context[0]->alphablend = c->alphablend;
951 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
954 //we set both src and dst depending on that the RGB side will be ignored
955 sws_setColorspaceDetails(c->cascaded_context[0], inv_table,
956 srcRange, table, dstRange,
957 brightness, contrast, saturation);
959 c->cascaded_context[1] = sws_getContext(tmp_width, tmp_height, tmp_format,
960 dstW, dstH, c->dstFormat,
961 c->flags, NULL, NULL, c->param);
962 if (!c->cascaded_context[1])
964 sws_setColorspaceDetails(c->cascaded_context[1], inv_table,
965 srcRange, table, dstRange,
966 0, 1 << 16, 1 << 16);
972 if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) {
973 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness,
974 contrast, saturation);
978 ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness,
979 contrast, saturation);
982 fill_rgb2yuv_table(c, table, dstRange);
987 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
988 int *srcRange, int **table, int *dstRange,
989 int *brightness, int *contrast, int *saturation)
994 *inv_table = c->srcColorspaceTable;
995 *table = c->dstColorspaceTable;
996 *srcRange = c->srcRange;
997 *dstRange = c->dstRange;
998 *brightness = c->brightness;
999 *contrast = c->contrast;
1000 *saturation = c->saturation;
1005 static int handle_jpeg(enum AVPixelFormat *format)
1008 case AV_PIX_FMT_YUVJ420P:
1009 *format = AV_PIX_FMT_YUV420P;
1011 case AV_PIX_FMT_YUVJ411P:
1012 *format = AV_PIX_FMT_YUV411P;
1014 case AV_PIX_FMT_YUVJ422P:
1015 *format = AV_PIX_FMT_YUV422P;
1017 case AV_PIX_FMT_YUVJ444P:
1018 *format = AV_PIX_FMT_YUV444P;
1020 case AV_PIX_FMT_YUVJ440P:
1021 *format = AV_PIX_FMT_YUV440P;
1023 case AV_PIX_FMT_GRAY8:
1024 case AV_PIX_FMT_YA8:
1025 case AV_PIX_FMT_GRAY16LE:
1026 case AV_PIX_FMT_GRAY16BE:
1027 case AV_PIX_FMT_YA16BE:
1028 case AV_PIX_FMT_YA16LE:
1035 static int handle_0alpha(enum AVPixelFormat *format)
1038 case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
1039 case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
1040 case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
1041 case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
1046 static int handle_xyz(enum AVPixelFormat *format)
1049 case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
1050 case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
1055 static void handle_formats(SwsContext *c)
1057 c->src0Alpha |= handle_0alpha(&c->srcFormat);
1058 c->dst0Alpha |= handle_0alpha(&c->dstFormat);
1059 c->srcXYZ |= handle_xyz(&c->srcFormat);
1060 c->dstXYZ |= handle_xyz(&c->dstFormat);
1061 if (c->srcXYZ || c->dstXYZ)
1065 SwsContext *sws_alloc_context(void)
1067 SwsContext *c = av_mallocz(sizeof(SwsContext));
1069 av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32));
1072 c->av_class = &ff_sws_context_class;
1073 av_opt_set_defaults(c);
1079 static uint16_t * alloc_gamma_tbl(double e)
1083 tbl = (uint16_t*)av_malloc(sizeof(uint16_t) * 1 << 16);
1087 for (i = 0; i < 65536; ++i) {
1088 tbl[i] = pow(i / 65535.0, e) * 65535.0;
1093 static enum AVPixelFormat alphaless_fmt(enum AVPixelFormat fmt)
1096 case AV_PIX_FMT_ARGB: return AV_PIX_FMT_RGB24;
1097 case AV_PIX_FMT_RGBA: return AV_PIX_FMT_RGB24;
1098 case AV_PIX_FMT_ABGR: return AV_PIX_FMT_BGR24;
1099 case AV_PIX_FMT_BGRA: return AV_PIX_FMT_BGR24;
1100 case AV_PIX_FMT_YA8: return AV_PIX_FMT_GRAY8;
1102 case AV_PIX_FMT_YUVA420P: return AV_PIX_FMT_YUV420P;
1103 case AV_PIX_FMT_YUVA422P: return AV_PIX_FMT_YUV422P;
1104 case AV_PIX_FMT_YUVA444P: return AV_PIX_FMT_YUV444P;
1106 case AV_PIX_FMT_GBRAP: return AV_PIX_FMT_GBRP;
1108 case AV_PIX_FMT_GBRAP10LE: return AV_PIX_FMT_GBRP10;
1109 case AV_PIX_FMT_GBRAP10BE: return AV_PIX_FMT_GBRP10;
1111 case AV_PIX_FMT_GBRAP12LE: return AV_PIX_FMT_GBRP12;
1112 case AV_PIX_FMT_GBRAP12BE: return AV_PIX_FMT_GBRP12;
1114 case AV_PIX_FMT_GBRAP16LE: return AV_PIX_FMT_GBRP16;
1115 case AV_PIX_FMT_GBRAP16BE: return AV_PIX_FMT_GBRP16;
1117 case AV_PIX_FMT_RGBA64LE: return AV_PIX_FMT_RGB48;
1118 case AV_PIX_FMT_RGBA64BE: return AV_PIX_FMT_RGB48;
1119 case AV_PIX_FMT_BGRA64LE: return AV_PIX_FMT_BGR48;
1120 case AV_PIX_FMT_BGRA64BE: return AV_PIX_FMT_BGR48;
1122 case AV_PIX_FMT_YA16BE: return AV_PIX_FMT_GRAY16;
1123 case AV_PIX_FMT_YA16LE: return AV_PIX_FMT_GRAY16;
1125 case AV_PIX_FMT_YUVA420P9BE: return AV_PIX_FMT_YUV420P9;
1126 case AV_PIX_FMT_YUVA422P9BE: return AV_PIX_FMT_YUV422P9;
1127 case AV_PIX_FMT_YUVA444P9BE: return AV_PIX_FMT_YUV444P9;
1128 case AV_PIX_FMT_YUVA420P9LE: return AV_PIX_FMT_YUV420P9;
1129 case AV_PIX_FMT_YUVA422P9LE: return AV_PIX_FMT_YUV422P9;
1130 case AV_PIX_FMT_YUVA444P9LE: return AV_PIX_FMT_YUV444P9;
1131 case AV_PIX_FMT_YUVA420P10BE: return AV_PIX_FMT_YUV420P10;
1132 case AV_PIX_FMT_YUVA422P10BE: return AV_PIX_FMT_YUV422P10;
1133 case AV_PIX_FMT_YUVA444P10BE: return AV_PIX_FMT_YUV444P10;
1134 case AV_PIX_FMT_YUVA420P10LE: return AV_PIX_FMT_YUV420P10;
1135 case AV_PIX_FMT_YUVA422P10LE: return AV_PIX_FMT_YUV422P10;
1136 case AV_PIX_FMT_YUVA444P10LE: return AV_PIX_FMT_YUV444P10;
1137 case AV_PIX_FMT_YUVA420P16BE: return AV_PIX_FMT_YUV420P16;
1138 case AV_PIX_FMT_YUVA422P16BE: return AV_PIX_FMT_YUV422P16;
1139 case AV_PIX_FMT_YUVA444P16BE: return AV_PIX_FMT_YUV444P16;
1140 case AV_PIX_FMT_YUVA420P16LE: return AV_PIX_FMT_YUV420P16;
1141 case AV_PIX_FMT_YUVA422P16LE: return AV_PIX_FMT_YUV422P16;
1142 case AV_PIX_FMT_YUVA444P16LE: return AV_PIX_FMT_YUV444P16;
1144 // case AV_PIX_FMT_AYUV64LE:
1145 // case AV_PIX_FMT_AYUV64BE:
1146 // case AV_PIX_FMT_PAL8:
1147 default: return AV_PIX_FMT_NONE;
1151 av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
1152 SwsFilter *dstFilter)
1155 int usesVFilter, usesHFilter;
1157 SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
1162 int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
1163 int flags, cpu_flags;
1164 enum AVPixelFormat srcFormat = c->srcFormat;
1165 enum AVPixelFormat dstFormat = c->dstFormat;
1166 const AVPixFmtDescriptor *desc_src;
1167 const AVPixFmtDescriptor *desc_dst;
1169 enum AVPixelFormat tmpFmt;
1171 cpu_flags = av_get_cpu_flags();
1175 ff_sws_rgb2rgb_init();
1177 unscaled = (srcW == dstW && srcH == dstH);
1179 c->srcRange |= handle_jpeg(&c->srcFormat);
1180 c->dstRange |= handle_jpeg(&c->dstFormat);
1182 if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat)
1183 av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
1185 if (!c->contrast && !c->saturation && !c->dstFormatBpp)
1186 sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
1187 ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
1188 c->dstRange, 0, 1 << 16, 1 << 16);
1191 srcFormat = c->srcFormat;
1192 dstFormat = c->dstFormat;
1193 desc_src = av_pix_fmt_desc_get(srcFormat);
1194 desc_dst = av_pix_fmt_desc_get(dstFormat);
1196 // If the source has no alpha then disable alpha blendaway
1198 c->alphablend = SWS_ALPHA_BLEND_NONE;
1200 if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
1201 av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
1202 if (!sws_isSupportedInput(srcFormat)) {
1203 av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
1204 av_get_pix_fmt_name(srcFormat));
1205 return AVERROR(EINVAL);
1207 if (!sws_isSupportedOutput(dstFormat)) {
1208 av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
1209 av_get_pix_fmt_name(dstFormat));
1210 return AVERROR(EINVAL);
1213 av_assert2(desc_src && desc_dst);
1215 i = flags & (SWS_POINT |
1227 /* provide a default scaler if not set by caller */
1229 if (dstW < srcW && dstH < srcH)
1230 flags |= SWS_BICUBIC;
1231 else if (dstW > srcW && dstH > srcH)
1232 flags |= SWS_BICUBIC;
1234 flags |= SWS_BICUBIC;
1236 } else if (i & (i - 1)) {
1237 av_log(c, AV_LOG_ERROR,
1238 "Exactly one scaler algorithm must be chosen, got %X\n", i);
1239 return AVERROR(EINVAL);
1242 if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) {
1243 /* FIXME check if these are enough and try to lower them after
1244 * fixing the relevant parts of the code */
1245 av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
1246 srcW, srcH, dstW, dstH);
1247 return AVERROR(EINVAL);
1249 if (flags & SWS_FAST_BILINEAR) {
1250 if (srcW < 8 || dstW < 8) {
1251 flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
1257 dstFilter = &dummyFilter;
1259 srcFilter = &dummyFilter;
1261 c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
1262 c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
1263 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
1264 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
1265 c->vRounder = 4 * 0x0001000100010001ULL;
1267 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) ||
1268 (srcFilter->chrV && srcFilter->chrV->length > 1) ||
1269 (dstFilter->lumV && dstFilter->lumV->length > 1) ||
1270 (dstFilter->chrV && dstFilter->chrV->length > 1);
1271 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) ||
1272 (srcFilter->chrH && srcFilter->chrH->length > 1) ||
1273 (dstFilter->lumH && dstFilter->lumH->length > 1) ||
1274 (dstFilter->chrH && dstFilter->chrH->length > 1);
1276 av_pix_fmt_get_chroma_sub_sample(srcFormat, &c->chrSrcHSubSample, &c->chrSrcVSubSample);
1277 av_pix_fmt_get_chroma_sub_sample(dstFormat, &c->chrDstHSubSample, &c->chrDstVSubSample);
1279 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
1281 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
1282 flags |= SWS_FULL_CHR_H_INT;
1286 if ( c->chrSrcHSubSample == 0
1287 && c->chrSrcVSubSample == 0
1288 && c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER
1289 && !(c->flags & SWS_FAST_BILINEAR)
1291 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n");
1292 flags |= SWS_FULL_CHR_H_INT;
1297 if (c->dither == SWS_DITHER_AUTO) {
1298 if (flags & SWS_ERROR_DIFFUSION)
1299 c->dither = SWS_DITHER_ED;
1302 if(dstFormat == AV_PIX_FMT_BGR4_BYTE ||
1303 dstFormat == AV_PIX_FMT_RGB4_BYTE ||
1304 dstFormat == AV_PIX_FMT_BGR8 ||
1305 dstFormat == AV_PIX_FMT_RGB8) {
1306 if (c->dither == SWS_DITHER_AUTO)
1307 c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
1308 if (!(flags & SWS_FULL_CHR_H_INT)) {
1309 if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER) {
1310 av_log(c, AV_LOG_DEBUG,
1311 "Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
1312 av_get_pix_fmt_name(dstFormat));
1313 flags |= SWS_FULL_CHR_H_INT;
1317 if (flags & SWS_FULL_CHR_H_INT) {
1318 if (c->dither == SWS_DITHER_BAYER) {
1319 av_log(c, AV_LOG_DEBUG,
1320 "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
1321 av_get_pix_fmt_name(dstFormat));
1322 c->dither = SWS_DITHER_ED;
1326 if (isPlanarRGB(dstFormat)) {
1327 if (!(flags & SWS_FULL_CHR_H_INT)) {
1328 av_log(c, AV_LOG_DEBUG,
1329 "%s output is not supported with half chroma resolution, switching to full\n",
1330 av_get_pix_fmt_name(dstFormat));
1331 flags |= SWS_FULL_CHR_H_INT;
1336 /* reuse chroma for 2 pixels RGB/BGR unless user wants full
1337 * chroma interpolation */
1338 if (flags & SWS_FULL_CHR_H_INT &&
1339 isAnyRGB(dstFormat) &&
1340 !isPlanarRGB(dstFormat) &&
1341 dstFormat != AV_PIX_FMT_RGBA64LE &&
1342 dstFormat != AV_PIX_FMT_RGBA64BE &&
1343 dstFormat != AV_PIX_FMT_BGRA64LE &&
1344 dstFormat != AV_PIX_FMT_BGRA64BE &&
1345 dstFormat != AV_PIX_FMT_RGB48LE &&
1346 dstFormat != AV_PIX_FMT_RGB48BE &&
1347 dstFormat != AV_PIX_FMT_BGR48LE &&
1348 dstFormat != AV_PIX_FMT_BGR48BE &&
1349 dstFormat != AV_PIX_FMT_RGBA &&
1350 dstFormat != AV_PIX_FMT_ARGB &&
1351 dstFormat != AV_PIX_FMT_BGRA &&
1352 dstFormat != AV_PIX_FMT_ABGR &&
1353 dstFormat != AV_PIX_FMT_RGB24 &&
1354 dstFormat != AV_PIX_FMT_BGR24 &&
1355 dstFormat != AV_PIX_FMT_BGR4_BYTE &&
1356 dstFormat != AV_PIX_FMT_RGB4_BYTE &&
1357 dstFormat != AV_PIX_FMT_BGR8 &&
1358 dstFormat != AV_PIX_FMT_RGB8
1360 av_log(c, AV_LOG_WARNING,
1361 "full chroma interpolation for destination format '%s' not yet implemented\n",
1362 av_get_pix_fmt_name(dstFormat));
1363 flags &= ~SWS_FULL_CHR_H_INT;
1366 if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
1367 c->chrDstHSubSample = 1;
1369 // drop some chroma lines if the user wants it
1370 c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >>
1371 SWS_SRC_V_CHR_DROP_SHIFT;
1372 c->chrSrcVSubSample += c->vChrDrop;
1374 /* drop every other pixel for chroma calculation unless user
1375 * wants full chroma */
1376 if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) &&
1377 srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 &&
1378 srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 &&
1379 srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE &&
1380 srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE &&
1381 srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE &&
1382 srcFormat != AV_PIX_FMT_GBRAP10BE && srcFormat != AV_PIX_FMT_GBRAP10LE &&
1383 srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE &&
1384 srcFormat != AV_PIX_FMT_GBRAP12BE && srcFormat != AV_PIX_FMT_GBRAP12LE &&
1385 srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE &&
1386 srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE &&
1387 srcFormat != AV_PIX_FMT_GBRAP16BE && srcFormat != AV_PIX_FMT_GBRAP16LE &&
1388 ((dstW >> c->chrDstHSubSample) <= (srcW >> 1) ||
1389 (flags & SWS_FAST_BILINEAR)))
1390 c->chrSrcHSubSample = 1;
1392 // Note the AV_CEIL_RSHIFT is so that we always round toward +inf.
1393 c->chrSrcW = AV_CEIL_RSHIFT(srcW, c->chrSrcHSubSample);
1394 c->chrSrcH = AV_CEIL_RSHIFT(srcH, c->chrSrcVSubSample);
1395 c->chrDstW = AV_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
1396 c->chrDstH = AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
1398 FF_ALLOCZ_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
1400 c->srcBpc = desc_src->comp[0].depth;
1403 c->dstBpc = desc_dst->comp[0].depth;
1406 if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8)
1408 if (c->dstBpc == 16)
1411 if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
1412 c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 &&
1413 c->chrDstW >= c->chrSrcW &&
1415 if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (srcW & 15) == 0
1417 && (flags & SWS_FAST_BILINEAR)) {
1418 if (flags & SWS_PRINT_INFO)
1419 av_log(c, AV_LOG_INFO,
1420 "output width is not a multiple of 32 -> no MMXEXT scaler\n");
1422 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat))
1423 c->canMMXEXTBeUsed = 0;
1425 c->canMMXEXTBeUsed = 0;
1427 c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW;
1428 c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH;
1430 /* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src
1431 * to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do
1433 * n-2 is the last chrominance sample available.
1434 * This is not perfect, but no one should notice the difference, the more
1435 * correct variant would be like the vertical one, but that would require
1436 * some special code for the first and last pixel */
1437 if (flags & SWS_FAST_BILINEAR) {
1438 if (c->canMMXEXTBeUsed) {
1442 // we don't use the x86 asm scaler if MMX is available
1443 else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) {
1444 c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
1445 c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20;
1449 // hardcoded for now
1450 c->gamma_value = 2.2;
1451 tmpFmt = AV_PIX_FMT_RGBA64LE;
1454 if (!unscaled && c->gamma_flag && (srcFormat != tmpFmt || dstFormat != tmpFmt)) {
1456 c->cascaded_context[0] = NULL;
1458 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1459 srcW, srcH, tmpFmt, 64);
1463 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1465 flags, NULL, NULL, c->param);
1466 if (!c->cascaded_context[0]) {
1470 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFmt,
1472 flags, srcFilter, dstFilter, c->param);
1474 if (!c->cascaded_context[1])
1477 c2 = c->cascaded_context[1];
1478 c2->is_internal_gamma = 1;
1479 c2->gamma = alloc_gamma_tbl( c->gamma_value);
1480 c2->inv_gamma = alloc_gamma_tbl(1.f/c->gamma_value);
1481 if (!c2->gamma || !c2->inv_gamma)
1482 return AVERROR(ENOMEM);
1484 // is_internal_flag is set after creating the context
1485 // to properly create the gamma convert FilterDescriptor
1486 // we have to re-initialize it
1487 ff_free_filters(c2);
1488 if (ff_init_filters(c2) < 0) {
1489 sws_freeContext(c2);
1493 c->cascaded_context[2] = NULL;
1494 if (dstFormat != tmpFmt) {
1495 ret = av_image_alloc(c->cascaded1_tmp, c->cascaded1_tmpStride,
1496 dstW, dstH, tmpFmt, 64);
1500 c->cascaded_context[2] = sws_getContext(dstW, dstH, tmpFmt,
1501 dstW, dstH, dstFormat,
1502 flags, NULL, NULL, c->param);
1503 if (!c->cascaded_context[2])
1509 if (isBayer(srcFormat)) {
1511 (dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
1512 enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
1514 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1515 srcW, srcH, tmpFormat, 64);
1519 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1520 srcW, srcH, tmpFormat,
1521 flags, srcFilter, NULL, c->param);
1522 if (!c->cascaded_context[0])
1525 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
1526 dstW, dstH, dstFormat,
1527 flags, NULL, dstFilter, c->param);
1528 if (!c->cascaded_context[1])
1534 if (CONFIG_SWSCALE_ALPHA && isALPHA(srcFormat) && !isALPHA(dstFormat)) {
1535 enum AVPixelFormat tmpFormat = alphaless_fmt(srcFormat);
1537 if (tmpFormat != AV_PIX_FMT_NONE && c->alphablend != SWS_ALPHA_BLEND_NONE)
1539 dstFormat != tmpFormat ||
1540 usesHFilter || usesVFilter ||
1541 c->srcRange != c->dstRange
1543 c->cascaded_mainindex = 1;
1544 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1545 srcW, srcH, tmpFormat, 64);
1549 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, srcFormat,
1550 srcW, srcH, tmpFormat,
1552 if (!c->cascaded_context[0])
1554 c->cascaded_context[0]->alphablend = c->alphablend;
1555 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
1559 c->cascaded_context[1] = sws_alloc_set_opts(srcW, srcH, tmpFormat,
1560 dstW, dstH, dstFormat,
1562 if (!c->cascaded_context[1])
1565 c->cascaded_context[1]->srcRange = c->srcRange;
1566 c->cascaded_context[1]->dstRange = c->dstRange;
1567 ret = sws_init_context(c->cascaded_context[1], srcFilter , dstFilter);
1575 #define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS)
1577 /* precalculate horizontal scaler filter coefficients */
1579 #if HAVE_MMXEXT_INLINE
1580 // can't downscale !!!
1581 if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) {
1582 c->lumMmxextFilterCodeSize = ff_init_hscaler_mmxext(dstW, c->lumXInc, NULL,
1584 c->chrMmxextFilterCodeSize = ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc,
1585 NULL, NULL, NULL, 4);
1588 c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize,
1589 PROT_READ | PROT_WRITE,
1590 MAP_PRIVATE | MAP_ANONYMOUS,
1592 c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize,
1593 PROT_READ | PROT_WRITE,
1594 MAP_PRIVATE | MAP_ANONYMOUS,
1596 #elif HAVE_VIRTUALALLOC
1597 c->lumMmxextFilterCode = VirtualAlloc(NULL,
1598 c->lumMmxextFilterCodeSize,
1600 PAGE_EXECUTE_READWRITE);
1601 c->chrMmxextFilterCode = VirtualAlloc(NULL,
1602 c->chrMmxextFilterCodeSize,
1604 PAGE_EXECUTE_READWRITE);
1606 c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize);
1607 c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize);
1610 #ifdef MAP_ANONYMOUS
1611 if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED)
1613 if (!c->lumMmxextFilterCode || !c->chrMmxextFilterCode)
1616 av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
1617 return AVERROR(ENOMEM);
1620 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail);
1621 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail);
1622 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail);
1623 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail);
1625 ff_init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode,
1626 c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
1627 ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode,
1628 c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
1631 if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1
1632 || mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) {
1633 av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
1638 #endif /* HAVE_MMXEXT_INLINE */
1640 const int filterAlign = X86_MMX(cpu_flags) ? 4 :
1641 PPC_ALTIVEC(cpu_flags) ? 8 :
1642 have_neon(cpu_flags) ? 8 : 1;
1644 if ((ret = initFilter(&c->hLumFilter, &c->hLumFilterPos,
1645 &c->hLumFilterSize, c->lumXInc,
1646 srcW, dstW, filterAlign, 1 << 14,
1647 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1648 cpu_flags, srcFilter->lumH, dstFilter->lumH,
1650 get_local_pos(c, 0, 0, 0),
1651 get_local_pos(c, 0, 0, 0))) < 0)
1653 if ((ret = initFilter(&c->hChrFilter, &c->hChrFilterPos,
1654 &c->hChrFilterSize, c->chrXInc,
1655 c->chrSrcW, c->chrDstW, filterAlign, 1 << 14,
1656 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1657 cpu_flags, srcFilter->chrH, dstFilter->chrH,
1659 get_local_pos(c, c->chrSrcHSubSample, c->src_h_chr_pos, 0),
1660 get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0))) < 0)
1663 } // initialize horizontal stuff
1665 /* precalculate vertical scaler filter coefficients */
1667 const int filterAlign = X86_MMX(cpu_flags) ? 2 :
1668 PPC_ALTIVEC(cpu_flags) ? 8 :
1669 have_neon(cpu_flags) ? 2 : 1;
1671 if ((ret = initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize,
1672 c->lumYInc, srcH, dstH, filterAlign, (1 << 12),
1673 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1674 cpu_flags, srcFilter->lumV, dstFilter->lumV,
1676 get_local_pos(c, 0, 0, 1),
1677 get_local_pos(c, 0, 0, 1))) < 0)
1679 if ((ret = initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize,
1680 c->chrYInc, c->chrSrcH, c->chrDstH,
1681 filterAlign, (1 << 12),
1682 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1683 cpu_flags, srcFilter->chrV, dstFilter->chrV,
1685 get_local_pos(c, c->chrSrcVSubSample, c->src_v_chr_pos, 1),
1686 get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1))) < 0)
1691 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail);
1692 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail);
1694 for (i = 0; i < c->vLumFilterSize * c->dstH; i++) {
1696 short *p = (short *)&c->vYCoeffsBank[i];
1697 for (j = 0; j < 8; j++)
1698 p[j] = c->vLumFilter[i];
1701 for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) {
1703 short *p = (short *)&c->vCCoeffsBank[i];
1704 for (j = 0; j < 8; j++)
1705 p[j] = c->vChrFilter[i];
1710 for (i = 0; i < 4; i++)
1711 FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
1713 c->needAlpha = (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) ? 1 : 0;
1715 // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
1716 c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
1717 c->uv_offx2 = dst_stride + 16;
1719 av_assert0(c->chrDstH <= dstH);
1721 if (flags & SWS_PRINT_INFO) {
1722 const char *scaler = NULL, *cpucaps;
1724 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
1725 if (flags & scale_algorithms[i].flag) {
1726 scaler = scale_algorithms[i].description;
1731 scaler = "ehh flags invalid?!";
1732 av_log(c, AV_LOG_INFO, "%s scaler, from %s to %s%s ",
1734 av_get_pix_fmt_name(srcFormat),
1736 dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 ||
1737 dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE ||
1738 dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ?
1743 av_get_pix_fmt_name(dstFormat));
1745 if (INLINE_MMXEXT(cpu_flags))
1747 else if (INLINE_AMD3DNOW(cpu_flags))
1749 else if (INLINE_MMX(cpu_flags))
1751 else if (PPC_ALTIVEC(cpu_flags))
1752 cpucaps = "AltiVec";
1756 av_log(c, AV_LOG_INFO, "using %s\n", cpucaps);
1758 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1759 av_log(c, AV_LOG_DEBUG,
1760 "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1761 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1762 av_log(c, AV_LOG_DEBUG,
1763 "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1764 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH,
1765 c->chrXInc, c->chrYInc);
1768 /* alpha blend special case, note this has been split via cascaded contexts if its scaled */
1769 if (unscaled && !usesHFilter && !usesVFilter &&
1770 c->alphablend != SWS_ALPHA_BLEND_NONE &&
1771 isALPHA(srcFormat) &&
1772 (c->srcRange == c->dstRange || isAnyRGB(dstFormat)) &&
1773 alphaless_fmt(srcFormat) == dstFormat
1775 c->swscale = ff_sws_alphablendaway;
1777 if (flags & SWS_PRINT_INFO)
1778 av_log(c, AV_LOG_INFO,
1779 "using alpha blendaway %s -> %s special converter\n",
1780 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1784 /* unscaled special cases */
1785 if (unscaled && !usesHFilter && !usesVFilter &&
1786 (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
1787 ff_get_unscaled_swscale(c);
1790 if (flags & SWS_PRINT_INFO)
1791 av_log(c, AV_LOG_INFO,
1792 "using unscaled %s -> %s special converter\n",
1793 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1798 c->swscale = ff_getSwsFunc(c);
1799 return ff_init_filters(c);
1800 fail: // FIXME replace things by appropriate error codes
1801 if (ret == RETCODE_USE_CASCADE) {
1802 int tmpW = sqrt(srcW * (int64_t)dstW);
1803 int tmpH = sqrt(srcH * (int64_t)dstH);
1804 enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P;
1806 if (isALPHA(srcFormat))
1807 tmpFormat = AV_PIX_FMT_YUVA420P;
1809 if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
1810 return AVERROR(EINVAL);
1812 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1813 tmpW, tmpH, tmpFormat, 64);
1817 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1818 tmpW, tmpH, tmpFormat,
1819 flags, srcFilter, NULL, c->param);
1820 if (!c->cascaded_context[0])
1823 c->cascaded_context[1] = sws_getContext(tmpW, tmpH, tmpFormat,
1824 dstW, dstH, dstFormat,
1825 flags, NULL, dstFilter, c->param);
1826 if (!c->cascaded_context[1])
1833 SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
1834 int dstW, int dstH, enum AVPixelFormat dstFormat,
1835 int flags, const double *param)
1839 if (!(c = sws_alloc_context()))
1847 c->srcFormat = srcFormat;
1848 c->dstFormat = dstFormat;
1851 c->param[0] = param[0];
1852 c->param[1] = param[1];
1858 SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
1859 int dstW, int dstH, enum AVPixelFormat dstFormat,
1860 int flags, SwsFilter *srcFilter,
1861 SwsFilter *dstFilter, const double *param)
1865 c = sws_alloc_set_opts(srcW, srcH, srcFormat,
1866 dstW, dstH, dstFormat,
1871 if (sws_init_context(c, srcFilter, dstFilter) < 0) {
1879 static int isnan_vec(SwsVector *a)
1882 for (i=0; i<a->length; i++)
1883 if (isnan(a->coeff[i]))
1888 static void makenan_vec(SwsVector *a)
1891 for (i=0; i<a->length; i++)
1895 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1896 float lumaSharpen, float chromaSharpen,
1897 float chromaHShift, float chromaVShift,
1900 SwsFilter *filter = av_malloc(sizeof(SwsFilter));
1904 if (lumaGBlur != 0.0) {
1905 filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0);
1906 filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0);
1908 filter->lumH = sws_getIdentityVec();
1909 filter->lumV = sws_getIdentityVec();
1912 if (chromaGBlur != 0.0) {
1913 filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0);
1914 filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0);
1916 filter->chrH = sws_getIdentityVec();
1917 filter->chrV = sws_getIdentityVec();
1920 if (!filter->lumH || !filter->lumV || !filter->chrH || !filter->chrV)
1923 if (chromaSharpen != 0.0) {
1924 SwsVector *id = sws_getIdentityVec();
1927 sws_scaleVec(filter->chrH, -chromaSharpen);
1928 sws_scaleVec(filter->chrV, -chromaSharpen);
1929 sws_addVec(filter->chrH, id);
1930 sws_addVec(filter->chrV, id);
1934 if (lumaSharpen != 0.0) {
1935 SwsVector *id = sws_getIdentityVec();
1938 sws_scaleVec(filter->lumH, -lumaSharpen);
1939 sws_scaleVec(filter->lumV, -lumaSharpen);
1940 sws_addVec(filter->lumH, id);
1941 sws_addVec(filter->lumV, id);
1945 if (chromaHShift != 0.0)
1946 sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5));
1948 if (chromaVShift != 0.0)
1949 sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5));
1951 sws_normalizeVec(filter->chrH, 1.0);
1952 sws_normalizeVec(filter->chrV, 1.0);
1953 sws_normalizeVec(filter->lumH, 1.0);
1954 sws_normalizeVec(filter->lumV, 1.0);
1956 if (isnan_vec(filter->chrH) ||
1957 isnan_vec(filter->chrV) ||
1958 isnan_vec(filter->lumH) ||
1959 isnan_vec(filter->lumV))
1963 sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1965 sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1970 sws_freeVec(filter->lumH);
1971 sws_freeVec(filter->lumV);
1972 sws_freeVec(filter->chrH);
1973 sws_freeVec(filter->chrV);
1978 SwsVector *sws_allocVec(int length)
1982 if(length <= 0 || length > INT_MAX/ sizeof(double))
1985 vec = av_malloc(sizeof(SwsVector));
1988 vec->length = length;
1989 vec->coeff = av_malloc(sizeof(double) * length);
1995 SwsVector *sws_getGaussianVec(double variance, double quality)
1997 const int length = (int)(variance * quality + 0.5) | 1;
1999 double middle = (length - 1) * 0.5;
2002 if(variance < 0 || quality < 0)
2005 vec = sws_allocVec(length);
2010 for (i = 0; i < length; i++) {
2011 double dist = i - middle;
2012 vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
2013 sqrt(2 * variance * M_PI);
2016 sws_normalizeVec(vec, 1.0);
2022 * Allocate and return a vector with length coefficients, all
2023 * with the same value c.
2025 #if !FF_API_SWS_VECTOR
2028 SwsVector *sws_getConstVec(double c, int length)
2031 SwsVector *vec = sws_allocVec(length);
2036 for (i = 0; i < length; i++)
2043 * Allocate and return a vector with just one coefficient, with
2046 #if !FF_API_SWS_VECTOR
2049 SwsVector *sws_getIdentityVec(void)
2051 return sws_getConstVec(1.0, 1);
2054 static double sws_dcVec(SwsVector *a)
2059 for (i = 0; i < a->length; i++)
2065 void sws_scaleVec(SwsVector *a, double scalar)
2069 for (i = 0; i < a->length; i++)
2070 a->coeff[i] *= scalar;
2073 void sws_normalizeVec(SwsVector *a, double height)
2075 sws_scaleVec(a, height / sws_dcVec(a));
2078 #if FF_API_SWS_VECTOR
2079 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
2081 int length = a->length + b->length - 1;
2083 SwsVector *vec = sws_getConstVec(0.0, length);
2088 for (i = 0; i < a->length; i++) {
2089 for (j = 0; j < b->length; j++) {
2090 vec->coeff[i + j] += a->coeff[i] * b->coeff[j];
2098 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
2100 int length = FFMAX(a->length, b->length);
2102 SwsVector *vec = sws_getConstVec(0.0, length);
2107 for (i = 0; i < a->length; i++)
2108 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2109 for (i = 0; i < b->length; i++)
2110 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i];
2115 #if FF_API_SWS_VECTOR
2116 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
2118 int length = FFMAX(a->length, b->length);
2120 SwsVector *vec = sws_getConstVec(0.0, length);
2125 for (i = 0; i < a->length; i++)
2126 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2127 for (i = 0; i < b->length; i++)
2128 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i];
2134 /* shift left / or right if "shift" is negative */
2135 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
2137 int length = a->length + FFABS(shift) * 2;
2139 SwsVector *vec = sws_getConstVec(0.0, length);
2144 for (i = 0; i < a->length; i++) {
2145 vec->coeff[i + (length - 1) / 2 -
2146 (a->length - 1) / 2 - shift] = a->coeff[i];
2152 #if !FF_API_SWS_VECTOR
2155 void sws_shiftVec(SwsVector *a, int shift)
2157 SwsVector *shifted = sws_getShiftedVec(a, shift);
2163 a->coeff = shifted->coeff;
2164 a->length = shifted->length;
2168 #if !FF_API_SWS_VECTOR
2171 void sws_addVec(SwsVector *a, SwsVector *b)
2173 SwsVector *sum = sws_sumVec(a, b);
2179 a->coeff = sum->coeff;
2180 a->length = sum->length;
2184 #if FF_API_SWS_VECTOR
2185 void sws_subVec(SwsVector *a, SwsVector *b)
2187 SwsVector *diff = sws_diffVec(a, b);
2193 a->coeff = diff->coeff;
2194 a->length = diff->length;
2198 void sws_convVec(SwsVector *a, SwsVector *b)
2200 SwsVector *conv = sws_getConvVec(a, b);
2206 a->coeff = conv->coeff;
2207 a->length = conv->length;
2211 SwsVector *sws_cloneVec(SwsVector *a)
2213 SwsVector *vec = sws_allocVec(a->length);
2218 memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff));
2225 * Print with av_log() a textual representation of the vector a
2226 * if log_level <= av_log_level.
2228 #if !FF_API_SWS_VECTOR
2231 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
2238 for (i = 0; i < a->length; i++)
2239 if (a->coeff[i] > max)
2242 for (i = 0; i < a->length; i++)
2243 if (a->coeff[i] < min)
2248 for (i = 0; i < a->length; i++) {
2249 int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5);
2250 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
2252 av_log(log_ctx, log_level, " ");
2253 av_log(log_ctx, log_level, "|\n");
2257 void sws_freeVec(SwsVector *a)
2261 av_freep(&a->coeff);
2266 void sws_freeFilter(SwsFilter *filter)
2271 sws_freeVec(filter->lumH);
2272 sws_freeVec(filter->lumV);
2273 sws_freeVec(filter->chrH);
2274 sws_freeVec(filter->chrV);
2278 void sws_freeContext(SwsContext *c)
2284 for (i = 0; i < 4; i++)
2285 av_freep(&c->dither_error[i]);
2287 av_freep(&c->vLumFilter);
2288 av_freep(&c->vChrFilter);
2289 av_freep(&c->hLumFilter);
2290 av_freep(&c->hChrFilter);
2292 av_freep(&c->vYCoeffsBank);
2293 av_freep(&c->vCCoeffsBank);
2296 av_freep(&c->vLumFilterPos);
2297 av_freep(&c->vChrFilterPos);
2298 av_freep(&c->hLumFilterPos);
2299 av_freep(&c->hChrFilterPos);
2303 if (c->lumMmxextFilterCode)
2304 munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize);
2305 if (c->chrMmxextFilterCode)
2306 munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize);
2307 #elif HAVE_VIRTUALALLOC
2308 if (c->lumMmxextFilterCode)
2309 VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE);
2310 if (c->chrMmxextFilterCode)
2311 VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE);
2313 av_free(c->lumMmxextFilterCode);
2314 av_free(c->chrMmxextFilterCode);
2316 c->lumMmxextFilterCode = NULL;
2317 c->chrMmxextFilterCode = NULL;
2318 #endif /* HAVE_MMX_INLINE */
2320 av_freep(&c->yuvTable);
2321 av_freep(&c->formatConvBuffer);
2323 sws_freeContext(c->cascaded_context[0]);
2324 sws_freeContext(c->cascaded_context[1]);
2325 sws_freeContext(c->cascaded_context[2]);
2326 memset(c->cascaded_context, 0, sizeof(c->cascaded_context));
2327 av_freep(&c->cascaded_tmp[0]);
2328 av_freep(&c->cascaded1_tmp[0]);
2330 av_freep(&c->gamma);
2331 av_freep(&c->inv_gamma);
2338 struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
2339 int srcH, enum AVPixelFormat srcFormat,
2341 enum AVPixelFormat dstFormat, int flags,
2342 SwsFilter *srcFilter,
2343 SwsFilter *dstFilter,
2344 const double *param)
2346 static const double default_param[2] = { SWS_PARAM_DEFAULT,
2347 SWS_PARAM_DEFAULT };
2348 int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513,
2349 src_v_chr_pos = -513, dst_v_chr_pos = -513;
2352 param = default_param;
2355 (context->srcW != srcW ||
2356 context->srcH != srcH ||
2357 context->srcFormat != srcFormat ||
2358 context->dstW != dstW ||
2359 context->dstH != dstH ||
2360 context->dstFormat != dstFormat ||
2361 context->flags != flags ||
2362 context->param[0] != param[0] ||
2363 context->param[1] != param[1])) {
2365 av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos);
2366 av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos);
2367 av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos);
2368 av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos);
2369 sws_freeContext(context);
2374 if (!(context = sws_alloc_context()))
2376 context->srcW = srcW;
2377 context->srcH = srcH;
2378 context->srcFormat = srcFormat;
2379 context->dstW = dstW;
2380 context->dstH = dstH;
2381 context->dstFormat = dstFormat;
2382 context->flags = flags;
2383 context->param[0] = param[0];
2384 context->param[1] = param[1];
2386 av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0);
2387 av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0);
2388 av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0);
2389 av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0);
2391 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
2392 sws_freeContext(context);