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_GRAY9BE] = { 1, 1 },
135 [AV_PIX_FMT_GRAY9LE] = { 1, 1 },
136 [AV_PIX_FMT_GRAY10BE] = { 1, 1 },
137 [AV_PIX_FMT_GRAY10LE] = { 1, 1 },
138 [AV_PIX_FMT_GRAY12BE] = { 1, 1 },
139 [AV_PIX_FMT_GRAY12LE] = { 1, 1 },
140 [AV_PIX_FMT_GRAY14BE] = { 1, 1 },
141 [AV_PIX_FMT_GRAY14LE] = { 1, 1 },
142 [AV_PIX_FMT_GRAY16BE] = { 1, 1 },
143 [AV_PIX_FMT_GRAY16LE] = { 1, 1 },
144 [AV_PIX_FMT_YUV440P] = { 1, 1 },
145 [AV_PIX_FMT_YUVJ440P] = { 1, 1 },
146 [AV_PIX_FMT_YUV440P10LE] = { 1, 1 },
147 [AV_PIX_FMT_YUV440P10BE] = { 1, 1 },
148 [AV_PIX_FMT_YUV440P12LE] = { 1, 1 },
149 [AV_PIX_FMT_YUV440P12BE] = { 1, 1 },
150 [AV_PIX_FMT_YUVA420P] = { 1, 1 },
151 [AV_PIX_FMT_YUVA422P] = { 1, 1 },
152 [AV_PIX_FMT_YUVA444P] = { 1, 1 },
153 [AV_PIX_FMT_YUVA420P9BE] = { 1, 1 },
154 [AV_PIX_FMT_YUVA420P9LE] = { 1, 1 },
155 [AV_PIX_FMT_YUVA422P9BE] = { 1, 1 },
156 [AV_PIX_FMT_YUVA422P9LE] = { 1, 1 },
157 [AV_PIX_FMT_YUVA444P9BE] = { 1, 1 },
158 [AV_PIX_FMT_YUVA444P9LE] = { 1, 1 },
159 [AV_PIX_FMT_YUVA420P10BE]= { 1, 1 },
160 [AV_PIX_FMT_YUVA420P10LE]= { 1, 1 },
161 [AV_PIX_FMT_YUVA422P10BE]= { 1, 1 },
162 [AV_PIX_FMT_YUVA422P10LE]= { 1, 1 },
163 [AV_PIX_FMT_YUVA444P10BE]= { 1, 1 },
164 [AV_PIX_FMT_YUVA444P10LE]= { 1, 1 },
165 [AV_PIX_FMT_YUVA420P16BE]= { 1, 1 },
166 [AV_PIX_FMT_YUVA420P16LE]= { 1, 1 },
167 [AV_PIX_FMT_YUVA422P16BE]= { 1, 1 },
168 [AV_PIX_FMT_YUVA422P16LE]= { 1, 1 },
169 [AV_PIX_FMT_YUVA444P16BE]= { 1, 1 },
170 [AV_PIX_FMT_YUVA444P16LE]= { 1, 1 },
171 [AV_PIX_FMT_RGB48BE] = { 1, 1 },
172 [AV_PIX_FMT_RGB48LE] = { 1, 1 },
173 [AV_PIX_FMT_RGBA64BE] = { 1, 1, 1 },
174 [AV_PIX_FMT_RGBA64LE] = { 1, 1, 1 },
175 [AV_PIX_FMT_RGB565BE] = { 1, 1 },
176 [AV_PIX_FMT_RGB565LE] = { 1, 1 },
177 [AV_PIX_FMT_RGB555BE] = { 1, 1 },
178 [AV_PIX_FMT_RGB555LE] = { 1, 1 },
179 [AV_PIX_FMT_BGR565BE] = { 1, 1 },
180 [AV_PIX_FMT_BGR565LE] = { 1, 1 },
181 [AV_PIX_FMT_BGR555BE] = { 1, 1 },
182 [AV_PIX_FMT_BGR555LE] = { 1, 1 },
183 [AV_PIX_FMT_YUV420P16LE] = { 1, 1 },
184 [AV_PIX_FMT_YUV420P16BE] = { 1, 1 },
185 [AV_PIX_FMT_YUV422P16LE] = { 1, 1 },
186 [AV_PIX_FMT_YUV422P16BE] = { 1, 1 },
187 [AV_PIX_FMT_YUV444P16LE] = { 1, 1 },
188 [AV_PIX_FMT_YUV444P16BE] = { 1, 1 },
189 [AV_PIX_FMT_RGB444LE] = { 1, 1 },
190 [AV_PIX_FMT_RGB444BE] = { 1, 1 },
191 [AV_PIX_FMT_BGR444LE] = { 1, 1 },
192 [AV_PIX_FMT_BGR444BE] = { 1, 1 },
193 [AV_PIX_FMT_YA8] = { 1, 1 },
194 [AV_PIX_FMT_YA16BE] = { 1, 1 },
195 [AV_PIX_FMT_YA16LE] = { 1, 1 },
196 [AV_PIX_FMT_BGR48BE] = { 1, 1 },
197 [AV_PIX_FMT_BGR48LE] = { 1, 1 },
198 [AV_PIX_FMT_BGRA64BE] = { 1, 1, 1 },
199 [AV_PIX_FMT_BGRA64LE] = { 1, 1, 1 },
200 [AV_PIX_FMT_YUV420P9BE] = { 1, 1 },
201 [AV_PIX_FMT_YUV420P9LE] = { 1, 1 },
202 [AV_PIX_FMT_YUV420P10BE] = { 1, 1 },
203 [AV_PIX_FMT_YUV420P10LE] = { 1, 1 },
204 [AV_PIX_FMT_YUV420P12BE] = { 1, 1 },
205 [AV_PIX_FMT_YUV420P12LE] = { 1, 1 },
206 [AV_PIX_FMT_YUV420P14BE] = { 1, 1 },
207 [AV_PIX_FMT_YUV420P14LE] = { 1, 1 },
208 [AV_PIX_FMT_YUV422P9BE] = { 1, 1 },
209 [AV_PIX_FMT_YUV422P9LE] = { 1, 1 },
210 [AV_PIX_FMT_YUV422P10BE] = { 1, 1 },
211 [AV_PIX_FMT_YUV422P10LE] = { 1, 1 },
212 [AV_PIX_FMT_YUV422P12BE] = { 1, 1 },
213 [AV_PIX_FMT_YUV422P12LE] = { 1, 1 },
214 [AV_PIX_FMT_YUV422P14BE] = { 1, 1 },
215 [AV_PIX_FMT_YUV422P14LE] = { 1, 1 },
216 [AV_PIX_FMT_YUV444P9BE] = { 1, 1 },
217 [AV_PIX_FMT_YUV444P9LE] = { 1, 1 },
218 [AV_PIX_FMT_YUV444P10BE] = { 1, 1 },
219 [AV_PIX_FMT_YUV444P10LE] = { 1, 1 },
220 [AV_PIX_FMT_YUV444P12BE] = { 1, 1 },
221 [AV_PIX_FMT_YUV444P12LE] = { 1, 1 },
222 [AV_PIX_FMT_YUV444P14BE] = { 1, 1 },
223 [AV_PIX_FMT_YUV444P14LE] = { 1, 1 },
224 [AV_PIX_FMT_GBRP] = { 1, 1 },
225 [AV_PIX_FMT_GBRP9LE] = { 1, 1 },
226 [AV_PIX_FMT_GBRP9BE] = { 1, 1 },
227 [AV_PIX_FMT_GBRP10LE] = { 1, 1 },
228 [AV_PIX_FMT_GBRP10BE] = { 1, 1 },
229 [AV_PIX_FMT_GBRAP10LE] = { 1, 1 },
230 [AV_PIX_FMT_GBRAP10BE] = { 1, 1 },
231 [AV_PIX_FMT_GBRP12LE] = { 1, 1 },
232 [AV_PIX_FMT_GBRP12BE] = { 1, 1 },
233 [AV_PIX_FMT_GBRAP12LE] = { 1, 1 },
234 [AV_PIX_FMT_GBRAP12BE] = { 1, 1 },
235 [AV_PIX_FMT_GBRP14LE] = { 1, 1 },
236 [AV_PIX_FMT_GBRP14BE] = { 1, 1 },
237 [AV_PIX_FMT_GBRP16LE] = { 1, 1 },
238 [AV_PIX_FMT_GBRP16BE] = { 1, 1 },
239 [AV_PIX_FMT_GBRAP] = { 1, 1 },
240 [AV_PIX_FMT_GBRAP16LE] = { 1, 1 },
241 [AV_PIX_FMT_GBRAP16BE] = { 1, 1 },
242 [AV_PIX_FMT_BAYER_BGGR8] = { 1, 0 },
243 [AV_PIX_FMT_BAYER_RGGB8] = { 1, 0 },
244 [AV_PIX_FMT_BAYER_GBRG8] = { 1, 0 },
245 [AV_PIX_FMT_BAYER_GRBG8] = { 1, 0 },
246 [AV_PIX_FMT_BAYER_BGGR16LE] = { 1, 0 },
247 [AV_PIX_FMT_BAYER_BGGR16BE] = { 1, 0 },
248 [AV_PIX_FMT_BAYER_RGGB16LE] = { 1, 0 },
249 [AV_PIX_FMT_BAYER_RGGB16BE] = { 1, 0 },
250 [AV_PIX_FMT_BAYER_GBRG16LE] = { 1, 0 },
251 [AV_PIX_FMT_BAYER_GBRG16BE] = { 1, 0 },
252 [AV_PIX_FMT_BAYER_GRBG16LE] = { 1, 0 },
253 [AV_PIX_FMT_BAYER_GRBG16BE] = { 1, 0 },
254 [AV_PIX_FMT_XYZ12BE] = { 1, 1, 1 },
255 [AV_PIX_FMT_XYZ12LE] = { 1, 1, 1 },
256 [AV_PIX_FMT_AYUV64LE] = { 1, 1},
257 [AV_PIX_FMT_P010LE] = { 1, 1 },
258 [AV_PIX_FMT_P010BE] = { 1, 1 },
259 [AV_PIX_FMT_P016LE] = { 1, 1 },
260 [AV_PIX_FMT_P016BE] = { 1, 1 },
261 [AV_PIX_FMT_GRAYF32LE] = { 1, 1 },
262 [AV_PIX_FMT_GRAYF32BE] = { 1, 1 },
263 [AV_PIX_FMT_YUVA422P12BE] = { 1, 1 },
264 [AV_PIX_FMT_YUVA422P12LE] = { 1, 1 },
265 [AV_PIX_FMT_YUVA444P12BE] = { 1, 1 },
266 [AV_PIX_FMT_YUVA444P12LE] = { 1, 1 },
267 [AV_PIX_FMT_NV24] = { 1, 1 },
268 [AV_PIX_FMT_NV42] = { 1, 1 },
271 int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
273 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
274 format_entries[pix_fmt].is_supported_in : 0;
277 int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
279 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
280 format_entries[pix_fmt].is_supported_out : 0;
283 int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
285 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
286 format_entries[pix_fmt].is_supported_endianness : 0;
289 static double getSplineCoeff(double a, double b, double c, double d,
293 return ((d * dist + c) * dist + b) * dist + a;
295 return getSplineCoeff(0.0,
296 b + 2.0 * c + 3.0 * d,
298 -b - 3.0 * c - 6.0 * d,
302 static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
304 if (pos == -1 || pos <= -513) {
305 pos = (128 << chr_subsample) - 128;
307 pos += 128; // relative to ideal left edge
308 return pos >> chr_subsample;
312 int flag; ///< flag associated to the algorithm
313 const char *description; ///< human-readable description
314 int size_factor; ///< size factor used when initing the filters
317 static const ScaleAlgorithm scale_algorithms[] = {
318 { SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ },
319 { SWS_BICUBIC, "bicubic", 4 },
320 { SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 },
321 { SWS_BILINEAR, "bilinear", 2 },
322 { SWS_FAST_BILINEAR, "fast bilinear", -1 },
323 { SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ },
324 { SWS_LANCZOS, "Lanczos", -1 /* custom */ },
325 { SWS_POINT, "nearest neighbor / point", -1 },
326 { SWS_SINC, "sinc", 20 /* infinite ;) */ },
327 { SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ },
328 { SWS_X, "experimental", 8 },
331 static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
332 int *outFilterSize, int xInc, int srcW,
333 int dstW, int filterAlign, int one,
334 int flags, int cpu_flags,
335 SwsVector *srcFilter, SwsVector *dstFilter,
336 double param[2], int srcPos, int dstPos)
342 int64_t *filter = NULL;
343 int64_t *filter2 = NULL;
344 const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
347 emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
349 // NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
350 FF_ALLOC_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail);
352 if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
355 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter,
356 dstW, sizeof(*filter) * filterSize, fail);
358 for (i = 0; i < dstW; i++) {
359 filter[i * filterSize] = fone;
362 } else if (flags & SWS_POINT) { // lame looking point sampling mode
366 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
367 dstW, sizeof(*filter) * filterSize, fail);
369 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
370 for (i = 0; i < dstW; i++) {
371 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
373 (*filterPos)[i] = xx;
377 } else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) ||
378 (flags & SWS_FAST_BILINEAR)) { // bilinear upscale
382 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
383 dstW, sizeof(*filter) * filterSize, fail);
385 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
386 for (i = 0; i < dstW; i++) {
387 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
390 (*filterPos)[i] = xx;
391 // bilinear upscale / linear interpolate / area averaging
392 for (j = 0; j < filterSize; j++) {
393 int64_t coeff = fone - FFABS((int64_t)xx * (1 << 16) - xDstInSrc) * (fone >> 16);
396 filter[i * filterSize + j] = coeff;
405 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
406 if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) {
407 sizeFactor = scale_algorithms[i].size_factor;
411 if (flags & SWS_LANCZOS)
412 sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
413 av_assert0(sizeFactor > 0);
416 filterSize = 1 + sizeFactor; // upscale
418 filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
420 filterSize = FFMIN(filterSize, srcW - 2);
421 filterSize = FFMAX(filterSize, 1);
423 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
424 dstW, sizeof(*filter) * filterSize, fail);
426 xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
427 for (i = 0; i < dstW; i++) {
428 int xx = (xDstInSrc - (filterSize - 2) * (1LL<<16)) / (1 << 17);
430 (*filterPos)[i] = xx;
431 for (j = 0; j < filterSize; j++) {
432 int64_t d = (FFABS(((int64_t)xx * (1 << 17)) - xDstInSrc)) << 13;
438 floatd = d * (1.0 / (1 << 30));
440 if (flags & SWS_BICUBIC) {
441 int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
442 int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
444 if (d >= 1LL << 31) {
447 int64_t dd = (d * d) >> 30;
448 int64_t ddd = (dd * d) >> 30;
451 coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
452 (-18 * (1 << 24) + 12 * B + 6 * C) * dd +
453 (6 * (1 << 24) - 2 * B) * (1 << 30);
455 coeff = (-B - 6 * C) * ddd +
456 (6 * B + 30 * C) * dd +
457 (-12 * B - 48 * C) * d +
458 (8 * B + 24 * C) * (1 << 30);
460 coeff /= (1LL<<54)/fone;
461 } else if (flags & SWS_X) {
462 double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
466 c = cos(floatd * M_PI);
473 coeff = (c * 0.5 + 0.5) * fone;
474 } else if (flags & SWS_AREA) {
475 int64_t d2 = d - (1 << 29);
476 if (d2 * xInc < -(1LL << (29 + 16)))
477 coeff = 1.0 * (1LL << (30 + 16));
478 else if (d2 * xInc < (1LL << (29 + 16)))
479 coeff = -d2 * xInc + (1LL << (29 + 16));
482 coeff *= fone >> (30 + 16);
483 } else if (flags & SWS_GAUSS) {
484 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
485 coeff = exp2(-p * floatd * floatd) * fone;
486 } else if (flags & SWS_SINC) {
487 coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone;
488 } else if (flags & SWS_LANCZOS) {
489 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
490 coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) /
491 (floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
494 } else if (flags & SWS_BILINEAR) {
495 coeff = (1 << 30) - d;
499 } else if (flags & SWS_SPLINE) {
500 double p = -2.196152422706632;
501 coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone;
506 filter[i * filterSize + j] = coeff;
509 xDstInSrc += 2 * xInc;
513 /* apply src & dst Filter to filter -> filter2
516 av_assert0(filterSize > 0);
517 filter2Size = filterSize;
519 filter2Size += srcFilter->length - 1;
521 filter2Size += dstFilter->length - 1;
522 av_assert0(filter2Size > 0);
523 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter2, dstW, filter2Size * sizeof(*filter2), fail);
525 for (i = 0; i < dstW; i++) {
529 for (k = 0; k < srcFilter->length; k++) {
530 for (j = 0; j < filterSize; j++)
531 filter2[i * filter2Size + k + j] +=
532 srcFilter->coeff[k] * filter[i * filterSize + j];
535 for (j = 0; j < filterSize; j++)
536 filter2[i * filter2Size + j] = filter[i * filterSize + j];
540 (*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
544 /* try to reduce the filter-size (step1 find size and shift left) */
545 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
547 for (i = dstW - 1; i >= 0; i--) {
548 int min = filter2Size;
550 int64_t cutOff = 0.0;
552 /* get rid of near zero elements on the left by shifting left */
553 for (j = 0; j < filter2Size; j++) {
555 cutOff += FFABS(filter2[i * filter2Size]);
557 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
560 /* preserve monotonicity because the core can't handle the
561 * filter otherwise */
562 if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1])
565 // move filter coefficients left
566 for (k = 1; k < filter2Size; k++)
567 filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
568 filter2[i * filter2Size + k - 1] = 0;
573 /* count near zeros on the right */
574 for (j = filter2Size - 1; j > 0; j--) {
575 cutOff += FFABS(filter2[i * filter2Size + j]);
577 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
582 if (min > minFilterSize)
586 if (PPC_ALTIVEC(cpu_flags)) {
587 // we can handle the special case 4, so we don't want to go the full 8
588 if (minFilterSize < 5)
591 /* We really don't want to waste our time doing useless computation, so
592 * fall back on the scalar C code for very small filters.
593 * Vectorizing is worth it only if you have a decent-sized vector. */
594 if (minFilterSize < 3)
598 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
599 // special case for unscaled vertical filtering
600 if (minFilterSize == 1 && filterAlign == 2)
604 av_assert0(minFilterSize > 0);
605 filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
606 av_assert0(filterSize > 0);
607 filter = av_malloc_array(dstW, filterSize * sizeof(*filter));
610 if (filterSize >= MAX_FILTER_SIZE * 16 /
611 ((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16)) {
612 ret = RETCODE_USE_CASCADE;
615 *outFilterSize = filterSize;
617 if (flags & SWS_PRINT_INFO)
618 av_log(NULL, AV_LOG_VERBOSE,
619 "SwScaler: reducing / aligning filtersize %d -> %d\n",
620 filter2Size, filterSize);
621 /* try to reduce the filter-size (step2 reduce it) */
622 for (i = 0; i < dstW; i++) {
625 for (j = 0; j < filterSize; j++) {
626 if (j >= filter2Size)
627 filter[i * filterSize + j] = 0;
629 filter[i * filterSize + j] = filter2[i * filter2Size + j];
630 if ((flags & SWS_BITEXACT) && j >= minFilterSize)
631 filter[i * filterSize + j] = 0;
635 // FIXME try to align filterPos if possible
638 for (i = 0; i < dstW; i++) {
640 if ((*filterPos)[i] < 0) {
641 // move filter coefficients left to compensate for filterPos
642 for (j = 1; j < filterSize; j++) {
643 int left = FFMAX(j + (*filterPos)[i], 0);
644 filter[i * filterSize + left] += filter[i * filterSize + j];
645 filter[i * filterSize + j] = 0;
650 if ((*filterPos)[i] + filterSize > srcW) {
651 int shift = (*filterPos)[i] + FFMIN(filterSize - srcW, 0);
654 for (j = filterSize - 1; j >= 0; j--) {
655 if ((*filterPos)[i] + j >= srcW) {
656 acc += filter[i * filterSize + j];
657 filter[i * filterSize + j] = 0;
660 for (j = filterSize - 1; j >= 0; j--) {
662 filter[i * filterSize + j] = 0;
664 filter[i * filterSize + j] = filter[i * filterSize + j - shift];
668 (*filterPos)[i]-= shift;
669 filter[i * filterSize + srcW - 1 - (*filterPos)[i]] += acc;
671 av_assert0((*filterPos)[i] >= 0);
672 av_assert0((*filterPos)[i] < srcW);
673 if ((*filterPos)[i] + filterSize > srcW) {
674 for (j = 0; j < filterSize; j++) {
675 av_assert0((*filterPos)[i] + j < srcW || !filter[i * filterSize + j]);
680 // Note the +1 is for the MMX scaler which reads over the end
681 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
682 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, *outFilter,
683 (dstW + 3), *outFilterSize * sizeof(int16_t), fail);
685 /* normalize & store in outFilter */
686 for (i = 0; i < dstW; i++) {
691 for (j = 0; j < filterSize; j++) {
692 sum += filter[i * filterSize + j];
694 sum = (sum + one / 2) / one;
696 av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n");
699 for (j = 0; j < *outFilterSize; j++) {
700 int64_t v = filter[i * filterSize + j] + error;
701 int intV = ROUNDED_DIV(v, sum);
702 (*outFilter)[i * (*outFilterSize) + j] = intV;
703 error = v - intV * sum;
707 (*filterPos)[dstW + 0] =
708 (*filterPos)[dstW + 1] =
709 (*filterPos)[dstW + 2] = (*filterPos)[dstW - 1]; /* the MMX/SSE scaler will
710 * read over the end */
711 for (i = 0; i < *outFilterSize; i++) {
712 int k = (dstW - 1) * (*outFilterSize) + i;
713 (*outFilter)[k + 1 * (*outFilterSize)] =
714 (*outFilter)[k + 2 * (*outFilterSize)] =
715 (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
722 av_log(NULL, ret == RETCODE_USE_CASCADE ? AV_LOG_DEBUG : AV_LOG_ERROR, "sws: initFilter failed\n");
728 static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
730 int64_t W, V, Z, Cy, Cu, Cv;
731 int64_t vr = table[0];
732 int64_t ub = table[1];
733 int64_t ug = -table[2];
734 int64_t vg = -table[3];
737 uint8_t *p = (uint8_t*)c->input_rgb2yuv_table;
739 static const int8_t map[] = {
740 BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX,
741 RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX,
742 RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX,
743 BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX,
744 BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX,
745 RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX,
746 RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX,
747 BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX,
748 BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX,
749 RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX,
750 RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX,
751 BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX,
752 RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX,
753 BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX,
754 GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 ,
755 -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX,
756 RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX,
757 BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX,
758 GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 ,
759 -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX,
760 RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX,
761 BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX,
762 GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 ,
763 -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23
764 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24
765 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25
766 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26
767 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27
768 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28
769 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29
770 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30
771 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31
772 BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32
773 BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33
774 BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34
777 dstRange = 0; //FIXME range = 1 is handled elsewhere
787 W = ROUNDED_DIV(ONE*ONE*ug, ub);
788 V = ROUNDED_DIV(ONE*ONE*vg, vr);
791 Cy = ROUNDED_DIV(cy*Z, ONE);
792 Cu = ROUNDED_DIV(ub*Z, ONE);
793 Cv = ROUNDED_DIV(vr*Z, ONE);
795 c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy);
796 c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cy);
797 c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy);
799 c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu);
800 c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cu);
801 c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu);
803 c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv);
804 c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cv);
805 c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv);
807 if(/*!dstRange && */!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) {
808 c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
809 c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
810 c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
811 c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
812 c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
813 c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
814 c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
815 c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
816 c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
818 for(i=0; i<FF_ARRAY_ELEMS(map); i++)
819 AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0);
822 static void fill_xyztables(struct SwsContext *c)
825 double xyzgamma = XYZ_GAMMA;
826 double rgbgamma = 1.0 / RGB_GAMMA;
827 double xyzgammainv = 1.0 / XYZ_GAMMA;
828 double rgbgammainv = RGB_GAMMA;
829 static const int16_t xyz2rgb_matrix[3][4] = {
830 {13270, -6295, -2041},
832 { 228, -835, 4329} };
833 static const int16_t rgb2xyz_matrix[3][4] = {
837 static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
839 memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
840 memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix));
841 c->xyzgamma = xyzgamma_tab;
842 c->rgbgamma = rgbgamma_tab;
843 c->xyzgammainv = xyzgammainv_tab;
844 c->rgbgammainv = rgbgammainv_tab;
846 if (rgbgamma_tab[4095])
849 /* set gamma vectors */
850 for (i = 0; i < 4096; i++) {
851 xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
852 rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
853 xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
854 rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
858 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
859 int srcRange, const int table[4], int dstRange,
860 int brightness, int contrast, int saturation)
862 const AVPixFmtDescriptor *desc_dst;
863 const AVPixFmtDescriptor *desc_src;
867 desc_dst = av_pix_fmt_desc_get(c->dstFormat);
868 desc_src = av_pix_fmt_desc_get(c->srcFormat);
870 if(!isYUV(c->dstFormat) && !isGray(c->dstFormat))
872 if(!isYUV(c->srcFormat) && !isGray(c->srcFormat))
875 if (c->srcRange != srcRange ||
876 c->dstRange != dstRange ||
877 c->brightness != brightness ||
878 c->contrast != contrast ||
879 c->saturation != saturation ||
880 memcmp(c->srcColorspaceTable, inv_table, sizeof(int) * 4) ||
881 memcmp(c->dstColorspaceTable, table, sizeof(int) * 4)
885 memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4);
886 memmove(c->dstColorspaceTable, table, sizeof(int) * 4);
890 c->brightness = brightness;
891 c->contrast = contrast;
892 c->saturation = saturation;
893 c->srcRange = srcRange;
894 c->dstRange = dstRange;
896 //The srcBpc check is possibly wrong but we seem to lack a definitive reference to test this
897 //and what we have in ticket 2939 looks better with this check
898 if (need_reinit && (c->srcBpc == 8 || !isYUV(c->srcFormat)))
899 ff_sws_init_range_convert(c);
901 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
902 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
904 if (c->cascaded_context[c->cascaded_mainindex])
905 return sws_setColorspaceDetails(c->cascaded_context[c->cascaded_mainindex],inv_table, srcRange,table, dstRange, brightness, contrast, saturation);
910 if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat))) {
911 if (!c->cascaded_context[0] &&
912 memcmp(c->dstColorspaceTable, c->srcColorspaceTable, sizeof(int) * 4) &&
913 c->srcW && c->srcH && c->dstW && c->dstH) {
914 enum AVPixelFormat tmp_format;
915 int tmp_width, tmp_height;
921 av_log(c, AV_LOG_VERBOSE, "YUV color matrix differs for YUV->YUV, using intermediate RGB to convert\n");
923 if (isNBPS(c->dstFormat) || is16BPS(c->dstFormat)) {
924 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
925 tmp_format = AV_PIX_FMT_BGRA64;
927 tmp_format = AV_PIX_FMT_BGR48;
930 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
931 tmp_format = AV_PIX_FMT_BGRA;
933 tmp_format = AV_PIX_FMT_BGR24;
937 if (srcW*srcH > dstW*dstH) {
945 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
946 tmp_width, tmp_height, tmp_format, 64);
950 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, c->srcFormat,
951 tmp_width, tmp_height, tmp_format,
953 if (!c->cascaded_context[0])
956 c->cascaded_context[0]->alphablend = c->alphablend;
957 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
960 //we set both src and dst depending on that the RGB side will be ignored
961 sws_setColorspaceDetails(c->cascaded_context[0], inv_table,
962 srcRange, table, dstRange,
963 brightness, contrast, saturation);
965 c->cascaded_context[1] = sws_getContext(tmp_width, tmp_height, tmp_format,
966 dstW, dstH, c->dstFormat,
967 c->flags, NULL, NULL, c->param);
968 if (!c->cascaded_context[1])
970 sws_setColorspaceDetails(c->cascaded_context[1], inv_table,
971 srcRange, table, dstRange,
972 0, 1 << 16, 1 << 16);
978 if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) {
979 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness,
980 contrast, saturation);
984 ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness,
985 contrast, saturation);
988 fill_rgb2yuv_table(c, table, dstRange);
993 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
994 int *srcRange, int **table, int *dstRange,
995 int *brightness, int *contrast, int *saturation)
1000 *inv_table = c->srcColorspaceTable;
1001 *table = c->dstColorspaceTable;
1002 *srcRange = c->srcRange;
1003 *dstRange = c->dstRange;
1004 *brightness = c->brightness;
1005 *contrast = c->contrast;
1006 *saturation = c->saturation;
1011 static int handle_jpeg(enum AVPixelFormat *format)
1014 case AV_PIX_FMT_YUVJ420P:
1015 *format = AV_PIX_FMT_YUV420P;
1017 case AV_PIX_FMT_YUVJ411P:
1018 *format = AV_PIX_FMT_YUV411P;
1020 case AV_PIX_FMT_YUVJ422P:
1021 *format = AV_PIX_FMT_YUV422P;
1023 case AV_PIX_FMT_YUVJ444P:
1024 *format = AV_PIX_FMT_YUV444P;
1026 case AV_PIX_FMT_YUVJ440P:
1027 *format = AV_PIX_FMT_YUV440P;
1029 case AV_PIX_FMT_GRAY8:
1030 case AV_PIX_FMT_YA8:
1031 case AV_PIX_FMT_GRAY9LE:
1032 case AV_PIX_FMT_GRAY9BE:
1033 case AV_PIX_FMT_GRAY10LE:
1034 case AV_PIX_FMT_GRAY10BE:
1035 case AV_PIX_FMT_GRAY12LE:
1036 case AV_PIX_FMT_GRAY12BE:
1037 case AV_PIX_FMT_GRAY14LE:
1038 case AV_PIX_FMT_GRAY14BE:
1039 case AV_PIX_FMT_GRAY16LE:
1040 case AV_PIX_FMT_GRAY16BE:
1041 case AV_PIX_FMT_YA16BE:
1042 case AV_PIX_FMT_YA16LE:
1049 static int handle_0alpha(enum AVPixelFormat *format)
1052 case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
1053 case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
1054 case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
1055 case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
1060 static int handle_xyz(enum AVPixelFormat *format)
1063 case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
1064 case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
1069 static void handle_formats(SwsContext *c)
1071 c->src0Alpha |= handle_0alpha(&c->srcFormat);
1072 c->dst0Alpha |= handle_0alpha(&c->dstFormat);
1073 c->srcXYZ |= handle_xyz(&c->srcFormat);
1074 c->dstXYZ |= handle_xyz(&c->dstFormat);
1075 if (c->srcXYZ || c->dstXYZ)
1079 SwsContext *sws_alloc_context(void)
1081 SwsContext *c = av_mallocz(sizeof(SwsContext));
1083 av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32));
1086 c->av_class = &ff_sws_context_class;
1087 av_opt_set_defaults(c);
1093 static uint16_t * alloc_gamma_tbl(double e)
1097 tbl = (uint16_t*)av_malloc(sizeof(uint16_t) * 1 << 16);
1101 for (i = 0; i < 65536; ++i) {
1102 tbl[i] = pow(i / 65535.0, e) * 65535.0;
1107 static enum AVPixelFormat alphaless_fmt(enum AVPixelFormat fmt)
1110 case AV_PIX_FMT_ARGB: return AV_PIX_FMT_RGB24;
1111 case AV_PIX_FMT_RGBA: return AV_PIX_FMT_RGB24;
1112 case AV_PIX_FMT_ABGR: return AV_PIX_FMT_BGR24;
1113 case AV_PIX_FMT_BGRA: return AV_PIX_FMT_BGR24;
1114 case AV_PIX_FMT_YA8: return AV_PIX_FMT_GRAY8;
1116 case AV_PIX_FMT_YUVA420P: return AV_PIX_FMT_YUV420P;
1117 case AV_PIX_FMT_YUVA422P: return AV_PIX_FMT_YUV422P;
1118 case AV_PIX_FMT_YUVA444P: return AV_PIX_FMT_YUV444P;
1120 case AV_PIX_FMT_GBRAP: return AV_PIX_FMT_GBRP;
1122 case AV_PIX_FMT_GBRAP10LE: return AV_PIX_FMT_GBRP10;
1123 case AV_PIX_FMT_GBRAP10BE: return AV_PIX_FMT_GBRP10;
1125 case AV_PIX_FMT_GBRAP12LE: return AV_PIX_FMT_GBRP12;
1126 case AV_PIX_FMT_GBRAP12BE: return AV_PIX_FMT_GBRP12;
1128 case AV_PIX_FMT_GBRAP16LE: return AV_PIX_FMT_GBRP16;
1129 case AV_PIX_FMT_GBRAP16BE: return AV_PIX_FMT_GBRP16;
1131 case AV_PIX_FMT_RGBA64LE: return AV_PIX_FMT_RGB48;
1132 case AV_PIX_FMT_RGBA64BE: return AV_PIX_FMT_RGB48;
1133 case AV_PIX_FMT_BGRA64LE: return AV_PIX_FMT_BGR48;
1134 case AV_PIX_FMT_BGRA64BE: return AV_PIX_FMT_BGR48;
1136 case AV_PIX_FMT_YA16BE: return AV_PIX_FMT_GRAY16;
1137 case AV_PIX_FMT_YA16LE: return AV_PIX_FMT_GRAY16;
1139 case AV_PIX_FMT_YUVA420P9BE: return AV_PIX_FMT_YUV420P9;
1140 case AV_PIX_FMT_YUVA422P9BE: return AV_PIX_FMT_YUV422P9;
1141 case AV_PIX_FMT_YUVA444P9BE: return AV_PIX_FMT_YUV444P9;
1142 case AV_PIX_FMT_YUVA420P9LE: return AV_PIX_FMT_YUV420P9;
1143 case AV_PIX_FMT_YUVA422P9LE: return AV_PIX_FMT_YUV422P9;
1144 case AV_PIX_FMT_YUVA444P9LE: return AV_PIX_FMT_YUV444P9;
1145 case AV_PIX_FMT_YUVA420P10BE: return AV_PIX_FMT_YUV420P10;
1146 case AV_PIX_FMT_YUVA422P10BE: return AV_PIX_FMT_YUV422P10;
1147 case AV_PIX_FMT_YUVA444P10BE: return AV_PIX_FMT_YUV444P10;
1148 case AV_PIX_FMT_YUVA420P10LE: return AV_PIX_FMT_YUV420P10;
1149 case AV_PIX_FMT_YUVA422P10LE: return AV_PIX_FMT_YUV422P10;
1150 case AV_PIX_FMT_YUVA444P10LE: return AV_PIX_FMT_YUV444P10;
1151 case AV_PIX_FMT_YUVA420P16BE: return AV_PIX_FMT_YUV420P16;
1152 case AV_PIX_FMT_YUVA422P16BE: return AV_PIX_FMT_YUV422P16;
1153 case AV_PIX_FMT_YUVA444P16BE: return AV_PIX_FMT_YUV444P16;
1154 case AV_PIX_FMT_YUVA420P16LE: return AV_PIX_FMT_YUV420P16;
1155 case AV_PIX_FMT_YUVA422P16LE: return AV_PIX_FMT_YUV422P16;
1156 case AV_PIX_FMT_YUVA444P16LE: return AV_PIX_FMT_YUV444P16;
1158 // case AV_PIX_FMT_AYUV64LE:
1159 // case AV_PIX_FMT_AYUV64BE:
1160 // case AV_PIX_FMT_PAL8:
1161 default: return AV_PIX_FMT_NONE;
1165 av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
1166 SwsFilter *dstFilter)
1169 int usesVFilter, usesHFilter;
1171 SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
1176 int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
1177 int flags, cpu_flags;
1178 enum AVPixelFormat srcFormat = c->srcFormat;
1179 enum AVPixelFormat dstFormat = c->dstFormat;
1180 const AVPixFmtDescriptor *desc_src;
1181 const AVPixFmtDescriptor *desc_dst;
1183 enum AVPixelFormat tmpFmt;
1184 static const float float_mult = 1.0f / 255.0f;
1186 cpu_flags = av_get_cpu_flags();
1190 ff_sws_rgb2rgb_init();
1192 unscaled = (srcW == dstW && srcH == dstH);
1194 c->srcRange |= handle_jpeg(&c->srcFormat);
1195 c->dstRange |= handle_jpeg(&c->dstFormat);
1197 if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat)
1198 av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
1200 if (!c->contrast && !c->saturation && !c->dstFormatBpp)
1201 sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
1202 ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
1203 c->dstRange, 0, 1 << 16, 1 << 16);
1206 srcFormat = c->srcFormat;
1207 dstFormat = c->dstFormat;
1208 desc_src = av_pix_fmt_desc_get(srcFormat);
1209 desc_dst = av_pix_fmt_desc_get(dstFormat);
1211 // If the source has no alpha then disable alpha blendaway
1213 c->alphablend = SWS_ALPHA_BLEND_NONE;
1215 if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
1216 av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
1217 if (!sws_isSupportedInput(srcFormat)) {
1218 av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
1219 av_get_pix_fmt_name(srcFormat));
1220 return AVERROR(EINVAL);
1222 if (!sws_isSupportedOutput(dstFormat)) {
1223 av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
1224 av_get_pix_fmt_name(dstFormat));
1225 return AVERROR(EINVAL);
1228 av_assert2(desc_src && desc_dst);
1230 i = flags & (SWS_POINT |
1242 /* provide a default scaler if not set by caller */
1244 if (dstW < srcW && dstH < srcH)
1245 flags |= SWS_BICUBIC;
1246 else if (dstW > srcW && dstH > srcH)
1247 flags |= SWS_BICUBIC;
1249 flags |= SWS_BICUBIC;
1251 } else if (i & (i - 1)) {
1252 av_log(c, AV_LOG_ERROR,
1253 "Exactly one scaler algorithm must be chosen, got %X\n", i);
1254 return AVERROR(EINVAL);
1257 if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) {
1258 /* FIXME check if these are enough and try to lower them after
1259 * fixing the relevant parts of the code */
1260 av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
1261 srcW, srcH, dstW, dstH);
1262 return AVERROR(EINVAL);
1264 if (flags & SWS_FAST_BILINEAR) {
1265 if (srcW < 8 || dstW < 8) {
1266 flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
1272 dstFilter = &dummyFilter;
1274 srcFilter = &dummyFilter;
1276 c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
1277 c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
1278 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
1279 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
1280 c->vRounder = 4 * 0x0001000100010001ULL;
1282 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) ||
1283 (srcFilter->chrV && srcFilter->chrV->length > 1) ||
1284 (dstFilter->lumV && dstFilter->lumV->length > 1) ||
1285 (dstFilter->chrV && dstFilter->chrV->length > 1);
1286 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) ||
1287 (srcFilter->chrH && srcFilter->chrH->length > 1) ||
1288 (dstFilter->lumH && dstFilter->lumH->length > 1) ||
1289 (dstFilter->chrH && dstFilter->chrH->length > 1);
1291 av_pix_fmt_get_chroma_sub_sample(srcFormat, &c->chrSrcHSubSample, &c->chrSrcVSubSample);
1292 av_pix_fmt_get_chroma_sub_sample(dstFormat, &c->chrDstHSubSample, &c->chrDstVSubSample);
1294 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
1296 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
1297 flags |= SWS_FULL_CHR_H_INT;
1301 if ( c->chrSrcHSubSample == 0
1302 && c->chrSrcVSubSample == 0
1303 && c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER
1304 && !(c->flags & SWS_FAST_BILINEAR)
1306 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n");
1307 flags |= SWS_FULL_CHR_H_INT;
1312 if (c->dither == SWS_DITHER_AUTO) {
1313 if (flags & SWS_ERROR_DIFFUSION)
1314 c->dither = SWS_DITHER_ED;
1317 if(dstFormat == AV_PIX_FMT_BGR4_BYTE ||
1318 dstFormat == AV_PIX_FMT_RGB4_BYTE ||
1319 dstFormat == AV_PIX_FMT_BGR8 ||
1320 dstFormat == AV_PIX_FMT_RGB8) {
1321 if (c->dither == SWS_DITHER_AUTO)
1322 c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
1323 if (!(flags & SWS_FULL_CHR_H_INT)) {
1324 if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER) {
1325 av_log(c, AV_LOG_DEBUG,
1326 "Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
1327 av_get_pix_fmt_name(dstFormat));
1328 flags |= SWS_FULL_CHR_H_INT;
1332 if (flags & SWS_FULL_CHR_H_INT) {
1333 if (c->dither == SWS_DITHER_BAYER) {
1334 av_log(c, AV_LOG_DEBUG,
1335 "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
1336 av_get_pix_fmt_name(dstFormat));
1337 c->dither = SWS_DITHER_ED;
1341 if (isPlanarRGB(dstFormat)) {
1342 if (!(flags & SWS_FULL_CHR_H_INT)) {
1343 av_log(c, AV_LOG_DEBUG,
1344 "%s output is not supported with half chroma resolution, switching to full\n",
1345 av_get_pix_fmt_name(dstFormat));
1346 flags |= SWS_FULL_CHR_H_INT;
1351 /* reuse chroma for 2 pixels RGB/BGR unless user wants full
1352 * chroma interpolation */
1353 if (flags & SWS_FULL_CHR_H_INT &&
1354 isAnyRGB(dstFormat) &&
1355 !isPlanarRGB(dstFormat) &&
1356 dstFormat != AV_PIX_FMT_RGBA64LE &&
1357 dstFormat != AV_PIX_FMT_RGBA64BE &&
1358 dstFormat != AV_PIX_FMT_BGRA64LE &&
1359 dstFormat != AV_PIX_FMT_BGRA64BE &&
1360 dstFormat != AV_PIX_FMT_RGB48LE &&
1361 dstFormat != AV_PIX_FMT_RGB48BE &&
1362 dstFormat != AV_PIX_FMT_BGR48LE &&
1363 dstFormat != AV_PIX_FMT_BGR48BE &&
1364 dstFormat != AV_PIX_FMT_RGBA &&
1365 dstFormat != AV_PIX_FMT_ARGB &&
1366 dstFormat != AV_PIX_FMT_BGRA &&
1367 dstFormat != AV_PIX_FMT_ABGR &&
1368 dstFormat != AV_PIX_FMT_RGB24 &&
1369 dstFormat != AV_PIX_FMT_BGR24 &&
1370 dstFormat != AV_PIX_FMT_BGR4_BYTE &&
1371 dstFormat != AV_PIX_FMT_RGB4_BYTE &&
1372 dstFormat != AV_PIX_FMT_BGR8 &&
1373 dstFormat != AV_PIX_FMT_RGB8
1375 av_log(c, AV_LOG_WARNING,
1376 "full chroma interpolation for destination format '%s' not yet implemented\n",
1377 av_get_pix_fmt_name(dstFormat));
1378 flags &= ~SWS_FULL_CHR_H_INT;
1381 if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
1382 c->chrDstHSubSample = 1;
1384 // drop some chroma lines if the user wants it
1385 c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >>
1386 SWS_SRC_V_CHR_DROP_SHIFT;
1387 c->chrSrcVSubSample += c->vChrDrop;
1389 /* drop every other pixel for chroma calculation unless user
1390 * wants full chroma */
1391 if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) &&
1392 srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 &&
1393 srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 &&
1394 srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE &&
1395 srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE &&
1396 srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE &&
1397 srcFormat != AV_PIX_FMT_GBRAP10BE && srcFormat != AV_PIX_FMT_GBRAP10LE &&
1398 srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE &&
1399 srcFormat != AV_PIX_FMT_GBRAP12BE && srcFormat != AV_PIX_FMT_GBRAP12LE &&
1400 srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE &&
1401 srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE &&
1402 srcFormat != AV_PIX_FMT_GBRAP16BE && srcFormat != AV_PIX_FMT_GBRAP16LE &&
1403 ((dstW >> c->chrDstHSubSample) <= (srcW >> 1) ||
1404 (flags & SWS_FAST_BILINEAR)))
1405 c->chrSrcHSubSample = 1;
1407 // Note the AV_CEIL_RSHIFT is so that we always round toward +inf.
1408 c->chrSrcW = AV_CEIL_RSHIFT(srcW, c->chrSrcHSubSample);
1409 c->chrSrcH = AV_CEIL_RSHIFT(srcH, c->chrSrcVSubSample);
1410 c->chrDstW = AV_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
1411 c->chrDstH = AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
1413 FF_ALLOCZ_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
1415 c->srcBpc = desc_src->comp[0].depth;
1418 c->dstBpc = desc_dst->comp[0].depth;
1421 if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8)
1423 if (c->dstBpc == 16)
1426 if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
1427 c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 &&
1428 c->chrDstW >= c->chrSrcW &&
1430 if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (srcW & 15) == 0
1432 && (flags & SWS_FAST_BILINEAR)) {
1433 if (flags & SWS_PRINT_INFO)
1434 av_log(c, AV_LOG_INFO,
1435 "output width is not a multiple of 32 -> no MMXEXT scaler\n");
1437 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat))
1438 c->canMMXEXTBeUsed = 0;
1440 c->canMMXEXTBeUsed = 0;
1442 c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW;
1443 c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH;
1445 /* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src
1446 * to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do
1448 * n-2 is the last chrominance sample available.
1449 * This is not perfect, but no one should notice the difference, the more
1450 * correct variant would be like the vertical one, but that would require
1451 * some special code for the first and last pixel */
1452 if (flags & SWS_FAST_BILINEAR) {
1453 if (c->canMMXEXTBeUsed) {
1457 // we don't use the x86 asm scaler if MMX is available
1458 else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) {
1459 c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
1460 c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20;
1464 // hardcoded for now
1465 c->gamma_value = 2.2;
1466 tmpFmt = AV_PIX_FMT_RGBA64LE;
1469 if (!unscaled && c->gamma_flag && (srcFormat != tmpFmt || dstFormat != tmpFmt)) {
1471 c->cascaded_context[0] = NULL;
1473 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1474 srcW, srcH, tmpFmt, 64);
1478 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1480 flags, NULL, NULL, c->param);
1481 if (!c->cascaded_context[0]) {
1485 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFmt,
1487 flags, srcFilter, dstFilter, c->param);
1489 if (!c->cascaded_context[1])
1492 c2 = c->cascaded_context[1];
1493 c2->is_internal_gamma = 1;
1494 c2->gamma = alloc_gamma_tbl( c->gamma_value);
1495 c2->inv_gamma = alloc_gamma_tbl(1.f/c->gamma_value);
1496 if (!c2->gamma || !c2->inv_gamma)
1497 return AVERROR(ENOMEM);
1499 // is_internal_flag is set after creating the context
1500 // to properly create the gamma convert FilterDescriptor
1501 // we have to re-initialize it
1502 ff_free_filters(c2);
1503 if (ff_init_filters(c2) < 0) {
1504 sws_freeContext(c2);
1508 c->cascaded_context[2] = NULL;
1509 if (dstFormat != tmpFmt) {
1510 ret = av_image_alloc(c->cascaded1_tmp, c->cascaded1_tmpStride,
1511 dstW, dstH, tmpFmt, 64);
1515 c->cascaded_context[2] = sws_getContext(dstW, dstH, tmpFmt,
1516 dstW, dstH, dstFormat,
1517 flags, NULL, NULL, c->param);
1518 if (!c->cascaded_context[2])
1524 if (isBayer(srcFormat)) {
1526 (dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
1527 enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
1529 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1530 srcW, srcH, tmpFormat, 64);
1534 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1535 srcW, srcH, tmpFormat,
1536 flags, srcFilter, NULL, c->param);
1537 if (!c->cascaded_context[0])
1540 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
1541 dstW, dstH, dstFormat,
1542 flags, NULL, dstFilter, c->param);
1543 if (!c->cascaded_context[1])
1549 if (unscaled && c->srcBpc == 8 && dstFormat == AV_PIX_FMT_GRAYF32){
1550 for (i = 0; i < 256; ++i){
1551 c->uint2float_lut[i] = (float)i * float_mult;
1555 // float will be converted to uint16_t
1556 if ((srcFormat == AV_PIX_FMT_GRAYF32BE || srcFormat == AV_PIX_FMT_GRAYF32LE) &&
1557 (!unscaled || unscaled && dstFormat != srcFormat && (srcFormat != AV_PIX_FMT_GRAYF32 ||
1558 dstFormat != AV_PIX_FMT_GRAY8))){
1562 if (CONFIG_SWSCALE_ALPHA && isALPHA(srcFormat) && !isALPHA(dstFormat)) {
1563 enum AVPixelFormat tmpFormat = alphaless_fmt(srcFormat);
1565 if (tmpFormat != AV_PIX_FMT_NONE && c->alphablend != SWS_ALPHA_BLEND_NONE)
1567 dstFormat != tmpFormat ||
1568 usesHFilter || usesVFilter ||
1569 c->srcRange != c->dstRange
1571 c->cascaded_mainindex = 1;
1572 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1573 srcW, srcH, tmpFormat, 64);
1577 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, srcFormat,
1578 srcW, srcH, tmpFormat,
1580 if (!c->cascaded_context[0])
1582 c->cascaded_context[0]->alphablend = c->alphablend;
1583 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
1587 c->cascaded_context[1] = sws_alloc_set_opts(srcW, srcH, tmpFormat,
1588 dstW, dstH, dstFormat,
1590 if (!c->cascaded_context[1])
1593 c->cascaded_context[1]->srcRange = c->srcRange;
1594 c->cascaded_context[1]->dstRange = c->dstRange;
1595 ret = sws_init_context(c->cascaded_context[1], srcFilter , dstFilter);
1603 #if HAVE_MMAP && HAVE_MPROTECT && defined(MAP_ANONYMOUS)
1609 /* precalculate horizontal scaler filter coefficients */
1611 #if HAVE_MMXEXT_INLINE
1612 // can't downscale !!!
1613 if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) {
1614 c->lumMmxextFilterCodeSize = ff_init_hscaler_mmxext(dstW, c->lumXInc, NULL,
1616 c->chrMmxextFilterCodeSize = ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc,
1617 NULL, NULL, NULL, 4);
1620 c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize,
1621 PROT_READ | PROT_WRITE,
1622 MAP_PRIVATE | MAP_ANONYMOUS,
1624 c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize,
1625 PROT_READ | PROT_WRITE,
1626 MAP_PRIVATE | MAP_ANONYMOUS,
1628 #elif HAVE_VIRTUALALLOC
1629 c->lumMmxextFilterCode = VirtualAlloc(NULL,
1630 c->lumMmxextFilterCodeSize,
1632 PAGE_EXECUTE_READWRITE);
1633 c->chrMmxextFilterCode = VirtualAlloc(NULL,
1634 c->chrMmxextFilterCodeSize,
1636 PAGE_EXECUTE_READWRITE);
1638 c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize);
1639 c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize);
1642 #ifdef MAP_ANONYMOUS
1643 if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED)
1645 if (!c->lumMmxextFilterCode || !c->chrMmxextFilterCode)
1648 av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
1649 return AVERROR(ENOMEM);
1652 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail);
1653 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail);
1654 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail);
1655 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail);
1657 ff_init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode,
1658 c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
1659 ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode,
1660 c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
1663 if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1
1664 || mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) {
1665 av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
1670 #endif /* HAVE_MMXEXT_INLINE */
1672 const int filterAlign = X86_MMX(cpu_flags) ? 4 :
1673 PPC_ALTIVEC(cpu_flags) ? 8 :
1674 have_neon(cpu_flags) ? 8 : 1;
1676 if ((ret = initFilter(&c->hLumFilter, &c->hLumFilterPos,
1677 &c->hLumFilterSize, c->lumXInc,
1678 srcW, dstW, filterAlign, 1 << 14,
1679 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1680 cpu_flags, srcFilter->lumH, dstFilter->lumH,
1682 get_local_pos(c, 0, 0, 0),
1683 get_local_pos(c, 0, 0, 0))) < 0)
1685 if ((ret = initFilter(&c->hChrFilter, &c->hChrFilterPos,
1686 &c->hChrFilterSize, c->chrXInc,
1687 c->chrSrcW, c->chrDstW, filterAlign, 1 << 14,
1688 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1689 cpu_flags, srcFilter->chrH, dstFilter->chrH,
1691 get_local_pos(c, c->chrSrcHSubSample, c->src_h_chr_pos, 0),
1692 get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0))) < 0)
1695 } // initialize horizontal stuff
1697 /* precalculate vertical scaler filter coefficients */
1699 const int filterAlign = X86_MMX(cpu_flags) ? 2 :
1700 PPC_ALTIVEC(cpu_flags) ? 8 :
1701 have_neon(cpu_flags) ? 2 : 1;
1703 if ((ret = initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize,
1704 c->lumYInc, srcH, dstH, filterAlign, (1 << 12),
1705 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1706 cpu_flags, srcFilter->lumV, dstFilter->lumV,
1708 get_local_pos(c, 0, 0, 1),
1709 get_local_pos(c, 0, 0, 1))) < 0)
1711 if ((ret = initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize,
1712 c->chrYInc, c->chrSrcH, c->chrDstH,
1713 filterAlign, (1 << 12),
1714 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1715 cpu_flags, srcFilter->chrV, dstFilter->chrV,
1717 get_local_pos(c, c->chrSrcVSubSample, c->src_v_chr_pos, 1),
1718 get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1))) < 0)
1723 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail);
1724 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail);
1726 for (i = 0; i < c->vLumFilterSize * c->dstH; i++) {
1728 short *p = (short *)&c->vYCoeffsBank[i];
1729 for (j = 0; j < 8; j++)
1730 p[j] = c->vLumFilter[i];
1733 for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) {
1735 short *p = (short *)&c->vCCoeffsBank[i];
1736 for (j = 0; j < 8; j++)
1737 p[j] = c->vChrFilter[i];
1742 for (i = 0; i < 4; i++)
1743 FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
1745 c->needAlpha = (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) ? 1 : 0;
1747 // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
1748 c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
1749 c->uv_offx2 = dst_stride + 16;
1751 av_assert0(c->chrDstH <= dstH);
1753 if (flags & SWS_PRINT_INFO) {
1754 const char *scaler = NULL, *cpucaps;
1756 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
1757 if (flags & scale_algorithms[i].flag) {
1758 scaler = scale_algorithms[i].description;
1763 scaler = "ehh flags invalid?!";
1764 av_log(c, AV_LOG_INFO, "%s scaler, from %s to %s%s ",
1766 av_get_pix_fmt_name(srcFormat),
1768 dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 ||
1769 dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE ||
1770 dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ?
1775 av_get_pix_fmt_name(dstFormat));
1777 if (INLINE_MMXEXT(cpu_flags))
1779 else if (INLINE_AMD3DNOW(cpu_flags))
1781 else if (INLINE_MMX(cpu_flags))
1783 else if (PPC_ALTIVEC(cpu_flags))
1784 cpucaps = "AltiVec";
1788 av_log(c, AV_LOG_INFO, "using %s\n", cpucaps);
1790 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1791 av_log(c, AV_LOG_DEBUG,
1792 "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1793 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1794 av_log(c, AV_LOG_DEBUG,
1795 "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1796 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH,
1797 c->chrXInc, c->chrYInc);
1800 /* alpha blend special case, note this has been split via cascaded contexts if its scaled */
1801 if (unscaled && !usesHFilter && !usesVFilter &&
1802 c->alphablend != SWS_ALPHA_BLEND_NONE &&
1803 isALPHA(srcFormat) &&
1804 (c->srcRange == c->dstRange || isAnyRGB(dstFormat)) &&
1805 alphaless_fmt(srcFormat) == dstFormat
1807 c->swscale = ff_sws_alphablendaway;
1809 if (flags & SWS_PRINT_INFO)
1810 av_log(c, AV_LOG_INFO,
1811 "using alpha blendaway %s -> %s special converter\n",
1812 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1816 /* unscaled special cases */
1817 if (unscaled && !usesHFilter && !usesVFilter &&
1818 (c->srcRange == c->dstRange || isAnyRGB(dstFormat) ||
1819 isFloat(srcFormat) || isFloat(dstFormat))){
1820 ff_get_unscaled_swscale(c);
1823 if (flags & SWS_PRINT_INFO)
1824 av_log(c, AV_LOG_INFO,
1825 "using unscaled %s -> %s special converter\n",
1826 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1831 c->swscale = ff_getSwsFunc(c);
1832 return ff_init_filters(c);
1833 fail: // FIXME replace things by appropriate error codes
1834 if (ret == RETCODE_USE_CASCADE) {
1835 int tmpW = sqrt(srcW * (int64_t)dstW);
1836 int tmpH = sqrt(srcH * (int64_t)dstH);
1837 enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P;
1839 if (isALPHA(srcFormat))
1840 tmpFormat = AV_PIX_FMT_YUVA420P;
1842 if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
1843 return AVERROR(EINVAL);
1845 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1846 tmpW, tmpH, tmpFormat, 64);
1850 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1851 tmpW, tmpH, tmpFormat,
1852 flags, srcFilter, NULL, c->param);
1853 if (!c->cascaded_context[0])
1856 c->cascaded_context[1] = sws_getContext(tmpW, tmpH, tmpFormat,
1857 dstW, dstH, dstFormat,
1858 flags, NULL, dstFilter, c->param);
1859 if (!c->cascaded_context[1])
1866 SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
1867 int dstW, int dstH, enum AVPixelFormat dstFormat,
1868 int flags, const double *param)
1872 if (!(c = sws_alloc_context()))
1880 c->srcFormat = srcFormat;
1881 c->dstFormat = dstFormat;
1884 c->param[0] = param[0];
1885 c->param[1] = param[1];
1891 SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
1892 int dstW, int dstH, enum AVPixelFormat dstFormat,
1893 int flags, SwsFilter *srcFilter,
1894 SwsFilter *dstFilter, const double *param)
1898 c = sws_alloc_set_opts(srcW, srcH, srcFormat,
1899 dstW, dstH, dstFormat,
1904 if (sws_init_context(c, srcFilter, dstFilter) < 0) {
1912 static int isnan_vec(SwsVector *a)
1915 for (i=0; i<a->length; i++)
1916 if (isnan(a->coeff[i]))
1921 static void makenan_vec(SwsVector *a)
1924 for (i=0; i<a->length; i++)
1928 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1929 float lumaSharpen, float chromaSharpen,
1930 float chromaHShift, float chromaVShift,
1933 SwsFilter *filter = av_malloc(sizeof(SwsFilter));
1937 if (lumaGBlur != 0.0) {
1938 filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0);
1939 filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0);
1941 filter->lumH = sws_getIdentityVec();
1942 filter->lumV = sws_getIdentityVec();
1945 if (chromaGBlur != 0.0) {
1946 filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0);
1947 filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0);
1949 filter->chrH = sws_getIdentityVec();
1950 filter->chrV = sws_getIdentityVec();
1953 if (!filter->lumH || !filter->lumV || !filter->chrH || !filter->chrV)
1956 if (chromaSharpen != 0.0) {
1957 SwsVector *id = sws_getIdentityVec();
1960 sws_scaleVec(filter->chrH, -chromaSharpen);
1961 sws_scaleVec(filter->chrV, -chromaSharpen);
1962 sws_addVec(filter->chrH, id);
1963 sws_addVec(filter->chrV, id);
1967 if (lumaSharpen != 0.0) {
1968 SwsVector *id = sws_getIdentityVec();
1971 sws_scaleVec(filter->lumH, -lumaSharpen);
1972 sws_scaleVec(filter->lumV, -lumaSharpen);
1973 sws_addVec(filter->lumH, id);
1974 sws_addVec(filter->lumV, id);
1978 if (chromaHShift != 0.0)
1979 sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5));
1981 if (chromaVShift != 0.0)
1982 sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5));
1984 sws_normalizeVec(filter->chrH, 1.0);
1985 sws_normalizeVec(filter->chrV, 1.0);
1986 sws_normalizeVec(filter->lumH, 1.0);
1987 sws_normalizeVec(filter->lumV, 1.0);
1989 if (isnan_vec(filter->chrH) ||
1990 isnan_vec(filter->chrV) ||
1991 isnan_vec(filter->lumH) ||
1992 isnan_vec(filter->lumV))
1996 sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1998 sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
2003 sws_freeVec(filter->lumH);
2004 sws_freeVec(filter->lumV);
2005 sws_freeVec(filter->chrH);
2006 sws_freeVec(filter->chrV);
2011 SwsVector *sws_allocVec(int length)
2015 if(length <= 0 || length > INT_MAX/ sizeof(double))
2018 vec = av_malloc(sizeof(SwsVector));
2021 vec->length = length;
2022 vec->coeff = av_malloc(sizeof(double) * length);
2028 SwsVector *sws_getGaussianVec(double variance, double quality)
2030 const int length = (int)(variance * quality + 0.5) | 1;
2032 double middle = (length - 1) * 0.5;
2035 if(variance < 0 || quality < 0)
2038 vec = sws_allocVec(length);
2043 for (i = 0; i < length; i++) {
2044 double dist = i - middle;
2045 vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
2046 sqrt(2 * variance * M_PI);
2049 sws_normalizeVec(vec, 1.0);
2055 * Allocate and return a vector with length coefficients, all
2056 * with the same value c.
2058 #if !FF_API_SWS_VECTOR
2061 SwsVector *sws_getConstVec(double c, int length)
2064 SwsVector *vec = sws_allocVec(length);
2069 for (i = 0; i < length; i++)
2076 * Allocate and return a vector with just one coefficient, with
2079 #if !FF_API_SWS_VECTOR
2082 SwsVector *sws_getIdentityVec(void)
2084 return sws_getConstVec(1.0, 1);
2087 static double sws_dcVec(SwsVector *a)
2092 for (i = 0; i < a->length; i++)
2098 void sws_scaleVec(SwsVector *a, double scalar)
2102 for (i = 0; i < a->length; i++)
2103 a->coeff[i] *= scalar;
2106 void sws_normalizeVec(SwsVector *a, double height)
2108 sws_scaleVec(a, height / sws_dcVec(a));
2111 #if FF_API_SWS_VECTOR
2112 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
2114 int length = a->length + b->length - 1;
2116 SwsVector *vec = sws_getConstVec(0.0, length);
2121 for (i = 0; i < a->length; i++) {
2122 for (j = 0; j < b->length; j++) {
2123 vec->coeff[i + j] += a->coeff[i] * b->coeff[j];
2131 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
2133 int length = FFMAX(a->length, b->length);
2135 SwsVector *vec = sws_getConstVec(0.0, length);
2140 for (i = 0; i < a->length; i++)
2141 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2142 for (i = 0; i < b->length; i++)
2143 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i];
2148 #if FF_API_SWS_VECTOR
2149 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
2151 int length = FFMAX(a->length, b->length);
2153 SwsVector *vec = sws_getConstVec(0.0, length);
2158 for (i = 0; i < a->length; i++)
2159 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2160 for (i = 0; i < b->length; i++)
2161 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i];
2167 /* shift left / or right if "shift" is negative */
2168 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
2170 int length = a->length + FFABS(shift) * 2;
2172 SwsVector *vec = sws_getConstVec(0.0, length);
2177 for (i = 0; i < a->length; i++) {
2178 vec->coeff[i + (length - 1) / 2 -
2179 (a->length - 1) / 2 - shift] = a->coeff[i];
2185 #if !FF_API_SWS_VECTOR
2188 void sws_shiftVec(SwsVector *a, int shift)
2190 SwsVector *shifted = sws_getShiftedVec(a, shift);
2196 a->coeff = shifted->coeff;
2197 a->length = shifted->length;
2201 #if !FF_API_SWS_VECTOR
2204 void sws_addVec(SwsVector *a, SwsVector *b)
2206 SwsVector *sum = sws_sumVec(a, b);
2212 a->coeff = sum->coeff;
2213 a->length = sum->length;
2217 #if FF_API_SWS_VECTOR
2218 void sws_subVec(SwsVector *a, SwsVector *b)
2220 SwsVector *diff = sws_diffVec(a, b);
2226 a->coeff = diff->coeff;
2227 a->length = diff->length;
2231 void sws_convVec(SwsVector *a, SwsVector *b)
2233 SwsVector *conv = sws_getConvVec(a, b);
2239 a->coeff = conv->coeff;
2240 a->length = conv->length;
2244 SwsVector *sws_cloneVec(SwsVector *a)
2246 SwsVector *vec = sws_allocVec(a->length);
2251 memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff));
2258 * Print with av_log() a textual representation of the vector a
2259 * if log_level <= av_log_level.
2261 #if !FF_API_SWS_VECTOR
2264 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
2271 for (i = 0; i < a->length; i++)
2272 if (a->coeff[i] > max)
2275 for (i = 0; i < a->length; i++)
2276 if (a->coeff[i] < min)
2281 for (i = 0; i < a->length; i++) {
2282 int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5);
2283 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
2285 av_log(log_ctx, log_level, " ");
2286 av_log(log_ctx, log_level, "|\n");
2290 void sws_freeVec(SwsVector *a)
2294 av_freep(&a->coeff);
2299 void sws_freeFilter(SwsFilter *filter)
2304 sws_freeVec(filter->lumH);
2305 sws_freeVec(filter->lumV);
2306 sws_freeVec(filter->chrH);
2307 sws_freeVec(filter->chrV);
2311 void sws_freeContext(SwsContext *c)
2317 for (i = 0; i < 4; i++)
2318 av_freep(&c->dither_error[i]);
2320 av_freep(&c->vLumFilter);
2321 av_freep(&c->vChrFilter);
2322 av_freep(&c->hLumFilter);
2323 av_freep(&c->hChrFilter);
2325 av_freep(&c->vYCoeffsBank);
2326 av_freep(&c->vCCoeffsBank);
2329 av_freep(&c->vLumFilterPos);
2330 av_freep(&c->vChrFilterPos);
2331 av_freep(&c->hLumFilterPos);
2332 av_freep(&c->hChrFilterPos);
2336 if (c->lumMmxextFilterCode)
2337 munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize);
2338 if (c->chrMmxextFilterCode)
2339 munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize);
2340 #elif HAVE_VIRTUALALLOC
2341 if (c->lumMmxextFilterCode)
2342 VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE);
2343 if (c->chrMmxextFilterCode)
2344 VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE);
2346 av_free(c->lumMmxextFilterCode);
2347 av_free(c->chrMmxextFilterCode);
2349 c->lumMmxextFilterCode = NULL;
2350 c->chrMmxextFilterCode = NULL;
2351 #endif /* HAVE_MMX_INLINE */
2353 av_freep(&c->yuvTable);
2354 av_freep(&c->formatConvBuffer);
2356 sws_freeContext(c->cascaded_context[0]);
2357 sws_freeContext(c->cascaded_context[1]);
2358 sws_freeContext(c->cascaded_context[2]);
2359 memset(c->cascaded_context, 0, sizeof(c->cascaded_context));
2360 av_freep(&c->cascaded_tmp[0]);
2361 av_freep(&c->cascaded1_tmp[0]);
2363 av_freep(&c->gamma);
2364 av_freep(&c->inv_gamma);
2371 struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
2372 int srcH, enum AVPixelFormat srcFormat,
2374 enum AVPixelFormat dstFormat, int flags,
2375 SwsFilter *srcFilter,
2376 SwsFilter *dstFilter,
2377 const double *param)
2379 static const double default_param[2] = { SWS_PARAM_DEFAULT,
2380 SWS_PARAM_DEFAULT };
2381 int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513,
2382 src_v_chr_pos = -513, dst_v_chr_pos = -513;
2385 param = default_param;
2388 (context->srcW != srcW ||
2389 context->srcH != srcH ||
2390 context->srcFormat != srcFormat ||
2391 context->dstW != dstW ||
2392 context->dstH != dstH ||
2393 context->dstFormat != dstFormat ||
2394 context->flags != flags ||
2395 context->param[0] != param[0] ||
2396 context->param[1] != param[1])) {
2398 av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos);
2399 av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos);
2400 av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos);
2401 av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos);
2402 sws_freeContext(context);
2407 if (!(context = sws_alloc_context()))
2409 context->srcW = srcW;
2410 context->srcH = srcH;
2411 context->srcFormat = srcFormat;
2412 context->dstW = dstW;
2413 context->dstH = dstH;
2414 context->dstFormat = dstFormat;
2415 context->flags = flags;
2416 context->param[0] = param[0];
2417 context->param[1] = param[1];
2419 av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0);
2420 av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0);
2421 av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0);
2422 av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0);
2424 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
2425 sws_freeContext(context);