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, 0 },
195 [AV_PIX_FMT_YA16LE] = { 1, 0 },
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 },
265 int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
267 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
268 format_entries[pix_fmt].is_supported_in : 0;
271 int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
273 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
274 format_entries[pix_fmt].is_supported_out : 0;
277 int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
279 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
280 format_entries[pix_fmt].is_supported_endianness : 0;
283 static double getSplineCoeff(double a, double b, double c, double d,
287 return ((d * dist + c) * dist + b) * dist + a;
289 return getSplineCoeff(0.0,
290 b + 2.0 * c + 3.0 * d,
292 -b - 3.0 * c - 6.0 * d,
296 static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
298 if (pos == -1 || pos <= -513) {
299 pos = (128 << chr_subsample) - 128;
301 pos += 128; // relative to ideal left edge
302 return pos >> chr_subsample;
306 int flag; ///< flag associated to the algorithm
307 const char *description; ///< human-readable description
308 int size_factor; ///< size factor used when initing the filters
311 static const ScaleAlgorithm scale_algorithms[] = {
312 { SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ },
313 { SWS_BICUBIC, "bicubic", 4 },
314 { SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 },
315 { SWS_BILINEAR, "bilinear", 2 },
316 { SWS_FAST_BILINEAR, "fast bilinear", -1 },
317 { SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ },
318 { SWS_LANCZOS, "Lanczos", -1 /* custom */ },
319 { SWS_POINT, "nearest neighbor / point", -1 },
320 { SWS_SINC, "sinc", 20 /* infinite ;) */ },
321 { SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ },
322 { SWS_X, "experimental", 8 },
325 static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
326 int *outFilterSize, int xInc, int srcW,
327 int dstW, int filterAlign, int one,
328 int flags, int cpu_flags,
329 SwsVector *srcFilter, SwsVector *dstFilter,
330 double param[2], int srcPos, int dstPos)
336 int64_t *filter = NULL;
337 int64_t *filter2 = NULL;
338 const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
341 emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
343 // NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
344 FF_ALLOC_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail);
346 if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
349 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter,
350 dstW, sizeof(*filter) * filterSize, fail);
352 for (i = 0; i < dstW; i++) {
353 filter[i * filterSize] = fone;
356 } else if (flags & SWS_POINT) { // lame looking point sampling mode
360 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
361 dstW, sizeof(*filter) * filterSize, fail);
363 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
364 for (i = 0; i < dstW; i++) {
365 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
367 (*filterPos)[i] = xx;
371 } else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) ||
372 (flags & SWS_FAST_BILINEAR)) { // bilinear upscale
376 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
377 dstW, sizeof(*filter) * filterSize, fail);
379 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
380 for (i = 0; i < dstW; i++) {
381 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
384 (*filterPos)[i] = xx;
385 // bilinear upscale / linear interpolate / area averaging
386 for (j = 0; j < filterSize; j++) {
387 int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
390 filter[i * filterSize + j] = coeff;
399 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
400 if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) {
401 sizeFactor = scale_algorithms[i].size_factor;
405 if (flags & SWS_LANCZOS)
406 sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
407 av_assert0(sizeFactor > 0);
410 filterSize = 1 + sizeFactor; // upscale
412 filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
414 filterSize = FFMIN(filterSize, srcW - 2);
415 filterSize = FFMAX(filterSize, 1);
417 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
418 dstW, sizeof(*filter) * filterSize, fail);
420 xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
421 for (i = 0; i < dstW; i++) {
422 int xx = (xDstInSrc - (filterSize - 2) * (1LL<<16)) / (1 << 17);
424 (*filterPos)[i] = xx;
425 for (j = 0; j < filterSize; j++) {
426 int64_t d = (FFABS(((int64_t)xx * (1 << 17)) - xDstInSrc)) << 13;
432 floatd = d * (1.0 / (1 << 30));
434 if (flags & SWS_BICUBIC) {
435 int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
436 int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
438 if (d >= 1LL << 31) {
441 int64_t dd = (d * d) >> 30;
442 int64_t ddd = (dd * d) >> 30;
445 coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
446 (-18 * (1 << 24) + 12 * B + 6 * C) * dd +
447 (6 * (1 << 24) - 2 * B) * (1 << 30);
449 coeff = (-B - 6 * C) * ddd +
450 (6 * B + 30 * C) * dd +
451 (-12 * B - 48 * C) * d +
452 (8 * B + 24 * C) * (1 << 30);
454 coeff /= (1LL<<54)/fone;
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_GRAY9LE:
1026 case AV_PIX_FMT_GRAY9BE:
1027 case AV_PIX_FMT_GRAY10LE:
1028 case AV_PIX_FMT_GRAY10BE:
1029 case AV_PIX_FMT_GRAY12LE:
1030 case AV_PIX_FMT_GRAY12BE:
1031 case AV_PIX_FMT_GRAY14LE:
1032 case AV_PIX_FMT_GRAY14BE:
1033 case AV_PIX_FMT_GRAY16LE:
1034 case AV_PIX_FMT_GRAY16BE:
1035 case AV_PIX_FMT_YA16BE:
1036 case AV_PIX_FMT_YA16LE:
1043 static int handle_0alpha(enum AVPixelFormat *format)
1046 case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
1047 case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
1048 case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
1049 case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
1054 static int handle_xyz(enum AVPixelFormat *format)
1057 case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
1058 case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
1063 static void handle_formats(SwsContext *c)
1065 c->src0Alpha |= handle_0alpha(&c->srcFormat);
1066 c->dst0Alpha |= handle_0alpha(&c->dstFormat);
1067 c->srcXYZ |= handle_xyz(&c->srcFormat);
1068 c->dstXYZ |= handle_xyz(&c->dstFormat);
1069 if (c->srcXYZ || c->dstXYZ)
1073 SwsContext *sws_alloc_context(void)
1075 SwsContext *c = av_mallocz(sizeof(SwsContext));
1077 av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32));
1080 c->av_class = &ff_sws_context_class;
1081 av_opt_set_defaults(c);
1087 static uint16_t * alloc_gamma_tbl(double e)
1091 tbl = (uint16_t*)av_malloc(sizeof(uint16_t) * 1 << 16);
1095 for (i = 0; i < 65536; ++i) {
1096 tbl[i] = pow(i / 65535.0, e) * 65535.0;
1101 static enum AVPixelFormat alphaless_fmt(enum AVPixelFormat fmt)
1104 case AV_PIX_FMT_ARGB: return AV_PIX_FMT_RGB24;
1105 case AV_PIX_FMT_RGBA: return AV_PIX_FMT_RGB24;
1106 case AV_PIX_FMT_ABGR: return AV_PIX_FMT_BGR24;
1107 case AV_PIX_FMT_BGRA: return AV_PIX_FMT_BGR24;
1108 case AV_PIX_FMT_YA8: return AV_PIX_FMT_GRAY8;
1110 case AV_PIX_FMT_YUVA420P: return AV_PIX_FMT_YUV420P;
1111 case AV_PIX_FMT_YUVA422P: return AV_PIX_FMT_YUV422P;
1112 case AV_PIX_FMT_YUVA444P: return AV_PIX_FMT_YUV444P;
1114 case AV_PIX_FMT_GBRAP: return AV_PIX_FMT_GBRP;
1116 case AV_PIX_FMT_GBRAP10LE: return AV_PIX_FMT_GBRP10;
1117 case AV_PIX_FMT_GBRAP10BE: return AV_PIX_FMT_GBRP10;
1119 case AV_PIX_FMT_GBRAP12LE: return AV_PIX_FMT_GBRP12;
1120 case AV_PIX_FMT_GBRAP12BE: return AV_PIX_FMT_GBRP12;
1122 case AV_PIX_FMT_GBRAP16LE: return AV_PIX_FMT_GBRP16;
1123 case AV_PIX_FMT_GBRAP16BE: return AV_PIX_FMT_GBRP16;
1125 case AV_PIX_FMT_RGBA64LE: return AV_PIX_FMT_RGB48;
1126 case AV_PIX_FMT_RGBA64BE: return AV_PIX_FMT_RGB48;
1127 case AV_PIX_FMT_BGRA64LE: return AV_PIX_FMT_BGR48;
1128 case AV_PIX_FMT_BGRA64BE: return AV_PIX_FMT_BGR48;
1130 case AV_PIX_FMT_YA16BE: return AV_PIX_FMT_GRAY16;
1131 case AV_PIX_FMT_YA16LE: return AV_PIX_FMT_GRAY16;
1133 case AV_PIX_FMT_YUVA420P9BE: return AV_PIX_FMT_YUV420P9;
1134 case AV_PIX_FMT_YUVA422P9BE: return AV_PIX_FMT_YUV422P9;
1135 case AV_PIX_FMT_YUVA444P9BE: return AV_PIX_FMT_YUV444P9;
1136 case AV_PIX_FMT_YUVA420P9LE: return AV_PIX_FMT_YUV420P9;
1137 case AV_PIX_FMT_YUVA422P9LE: return AV_PIX_FMT_YUV422P9;
1138 case AV_PIX_FMT_YUVA444P9LE: return AV_PIX_FMT_YUV444P9;
1139 case AV_PIX_FMT_YUVA420P10BE: return AV_PIX_FMT_YUV420P10;
1140 case AV_PIX_FMT_YUVA422P10BE: return AV_PIX_FMT_YUV422P10;
1141 case AV_PIX_FMT_YUVA444P10BE: return AV_PIX_FMT_YUV444P10;
1142 case AV_PIX_FMT_YUVA420P10LE: return AV_PIX_FMT_YUV420P10;
1143 case AV_PIX_FMT_YUVA422P10LE: return AV_PIX_FMT_YUV422P10;
1144 case AV_PIX_FMT_YUVA444P10LE: return AV_PIX_FMT_YUV444P10;
1145 case AV_PIX_FMT_YUVA420P16BE: return AV_PIX_FMT_YUV420P16;
1146 case AV_PIX_FMT_YUVA422P16BE: return AV_PIX_FMT_YUV422P16;
1147 case AV_PIX_FMT_YUVA444P16BE: return AV_PIX_FMT_YUV444P16;
1148 case AV_PIX_FMT_YUVA420P16LE: return AV_PIX_FMT_YUV420P16;
1149 case AV_PIX_FMT_YUVA422P16LE: return AV_PIX_FMT_YUV422P16;
1150 case AV_PIX_FMT_YUVA444P16LE: return AV_PIX_FMT_YUV444P16;
1152 // case AV_PIX_FMT_AYUV64LE:
1153 // case AV_PIX_FMT_AYUV64BE:
1154 // case AV_PIX_FMT_PAL8:
1155 default: return AV_PIX_FMT_NONE;
1159 av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
1160 SwsFilter *dstFilter)
1163 int usesVFilter, usesHFilter;
1165 SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
1170 int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
1171 int flags, cpu_flags;
1172 enum AVPixelFormat srcFormat = c->srcFormat;
1173 enum AVPixelFormat dstFormat = c->dstFormat;
1174 const AVPixFmtDescriptor *desc_src;
1175 const AVPixFmtDescriptor *desc_dst;
1177 enum AVPixelFormat tmpFmt;
1178 static const float float_mult = 1.0f / 255.0f;
1180 cpu_flags = av_get_cpu_flags();
1184 ff_sws_rgb2rgb_init();
1186 unscaled = (srcW == dstW && srcH == dstH);
1188 c->srcRange |= handle_jpeg(&c->srcFormat);
1189 c->dstRange |= handle_jpeg(&c->dstFormat);
1191 if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat)
1192 av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
1194 if (!c->contrast && !c->saturation && !c->dstFormatBpp)
1195 sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
1196 ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
1197 c->dstRange, 0, 1 << 16, 1 << 16);
1200 srcFormat = c->srcFormat;
1201 dstFormat = c->dstFormat;
1202 desc_src = av_pix_fmt_desc_get(srcFormat);
1203 desc_dst = av_pix_fmt_desc_get(dstFormat);
1205 // If the source has no alpha then disable alpha blendaway
1207 c->alphablend = SWS_ALPHA_BLEND_NONE;
1209 if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
1210 av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
1211 if (!sws_isSupportedInput(srcFormat)) {
1212 av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
1213 av_get_pix_fmt_name(srcFormat));
1214 return AVERROR(EINVAL);
1216 if (!sws_isSupportedOutput(dstFormat)) {
1217 av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
1218 av_get_pix_fmt_name(dstFormat));
1219 return AVERROR(EINVAL);
1222 av_assert2(desc_src && desc_dst);
1224 i = flags & (SWS_POINT |
1236 /* provide a default scaler if not set by caller */
1238 if (dstW < srcW && dstH < srcH)
1239 flags |= SWS_BICUBIC;
1240 else if (dstW > srcW && dstH > srcH)
1241 flags |= SWS_BICUBIC;
1243 flags |= SWS_BICUBIC;
1245 } else if (i & (i - 1)) {
1246 av_log(c, AV_LOG_ERROR,
1247 "Exactly one scaler algorithm must be chosen, got %X\n", i);
1248 return AVERROR(EINVAL);
1251 if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) {
1252 /* FIXME check if these are enough and try to lower them after
1253 * fixing the relevant parts of the code */
1254 av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
1255 srcW, srcH, dstW, dstH);
1256 return AVERROR(EINVAL);
1258 if (flags & SWS_FAST_BILINEAR) {
1259 if (srcW < 8 || dstW < 8) {
1260 flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
1266 dstFilter = &dummyFilter;
1268 srcFilter = &dummyFilter;
1270 c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
1271 c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
1272 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
1273 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
1274 c->vRounder = 4 * 0x0001000100010001ULL;
1276 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) ||
1277 (srcFilter->chrV && srcFilter->chrV->length > 1) ||
1278 (dstFilter->lumV && dstFilter->lumV->length > 1) ||
1279 (dstFilter->chrV && dstFilter->chrV->length > 1);
1280 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) ||
1281 (srcFilter->chrH && srcFilter->chrH->length > 1) ||
1282 (dstFilter->lumH && dstFilter->lumH->length > 1) ||
1283 (dstFilter->chrH && dstFilter->chrH->length > 1);
1285 av_pix_fmt_get_chroma_sub_sample(srcFormat, &c->chrSrcHSubSample, &c->chrSrcVSubSample);
1286 av_pix_fmt_get_chroma_sub_sample(dstFormat, &c->chrDstHSubSample, &c->chrDstVSubSample);
1288 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
1290 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
1291 flags |= SWS_FULL_CHR_H_INT;
1295 if ( c->chrSrcHSubSample == 0
1296 && c->chrSrcVSubSample == 0
1297 && c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER
1298 && !(c->flags & SWS_FAST_BILINEAR)
1300 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n");
1301 flags |= SWS_FULL_CHR_H_INT;
1306 if (c->dither == SWS_DITHER_AUTO) {
1307 if (flags & SWS_ERROR_DIFFUSION)
1308 c->dither = SWS_DITHER_ED;
1311 if(dstFormat == AV_PIX_FMT_BGR4_BYTE ||
1312 dstFormat == AV_PIX_FMT_RGB4_BYTE ||
1313 dstFormat == AV_PIX_FMT_BGR8 ||
1314 dstFormat == AV_PIX_FMT_RGB8) {
1315 if (c->dither == SWS_DITHER_AUTO)
1316 c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
1317 if (!(flags & SWS_FULL_CHR_H_INT)) {
1318 if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER) {
1319 av_log(c, AV_LOG_DEBUG,
1320 "Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
1321 av_get_pix_fmt_name(dstFormat));
1322 flags |= SWS_FULL_CHR_H_INT;
1326 if (flags & SWS_FULL_CHR_H_INT) {
1327 if (c->dither == SWS_DITHER_BAYER) {
1328 av_log(c, AV_LOG_DEBUG,
1329 "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
1330 av_get_pix_fmt_name(dstFormat));
1331 c->dither = SWS_DITHER_ED;
1335 if (isPlanarRGB(dstFormat)) {
1336 if (!(flags & SWS_FULL_CHR_H_INT)) {
1337 av_log(c, AV_LOG_DEBUG,
1338 "%s output is not supported with half chroma resolution, switching to full\n",
1339 av_get_pix_fmt_name(dstFormat));
1340 flags |= SWS_FULL_CHR_H_INT;
1345 /* reuse chroma for 2 pixels RGB/BGR unless user wants full
1346 * chroma interpolation */
1347 if (flags & SWS_FULL_CHR_H_INT &&
1348 isAnyRGB(dstFormat) &&
1349 !isPlanarRGB(dstFormat) &&
1350 dstFormat != AV_PIX_FMT_RGBA64LE &&
1351 dstFormat != AV_PIX_FMT_RGBA64BE &&
1352 dstFormat != AV_PIX_FMT_BGRA64LE &&
1353 dstFormat != AV_PIX_FMT_BGRA64BE &&
1354 dstFormat != AV_PIX_FMT_RGB48LE &&
1355 dstFormat != AV_PIX_FMT_RGB48BE &&
1356 dstFormat != AV_PIX_FMT_BGR48LE &&
1357 dstFormat != AV_PIX_FMT_BGR48BE &&
1358 dstFormat != AV_PIX_FMT_RGBA &&
1359 dstFormat != AV_PIX_FMT_ARGB &&
1360 dstFormat != AV_PIX_FMT_BGRA &&
1361 dstFormat != AV_PIX_FMT_ABGR &&
1362 dstFormat != AV_PIX_FMT_RGB24 &&
1363 dstFormat != AV_PIX_FMT_BGR24 &&
1364 dstFormat != AV_PIX_FMT_BGR4_BYTE &&
1365 dstFormat != AV_PIX_FMT_RGB4_BYTE &&
1366 dstFormat != AV_PIX_FMT_BGR8 &&
1367 dstFormat != AV_PIX_FMT_RGB8
1369 av_log(c, AV_LOG_WARNING,
1370 "full chroma interpolation for destination format '%s' not yet implemented\n",
1371 av_get_pix_fmt_name(dstFormat));
1372 flags &= ~SWS_FULL_CHR_H_INT;
1375 if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
1376 c->chrDstHSubSample = 1;
1378 // drop some chroma lines if the user wants it
1379 c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >>
1380 SWS_SRC_V_CHR_DROP_SHIFT;
1381 c->chrSrcVSubSample += c->vChrDrop;
1383 /* drop every other pixel for chroma calculation unless user
1384 * wants full chroma */
1385 if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) &&
1386 srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 &&
1387 srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 &&
1388 srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE &&
1389 srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE &&
1390 srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE &&
1391 srcFormat != AV_PIX_FMT_GBRAP10BE && srcFormat != AV_PIX_FMT_GBRAP10LE &&
1392 srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE &&
1393 srcFormat != AV_PIX_FMT_GBRAP12BE && srcFormat != AV_PIX_FMT_GBRAP12LE &&
1394 srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE &&
1395 srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE &&
1396 srcFormat != AV_PIX_FMT_GBRAP16BE && srcFormat != AV_PIX_FMT_GBRAP16LE &&
1397 ((dstW >> c->chrDstHSubSample) <= (srcW >> 1) ||
1398 (flags & SWS_FAST_BILINEAR)))
1399 c->chrSrcHSubSample = 1;
1401 // Note the AV_CEIL_RSHIFT is so that we always round toward +inf.
1402 c->chrSrcW = AV_CEIL_RSHIFT(srcW, c->chrSrcHSubSample);
1403 c->chrSrcH = AV_CEIL_RSHIFT(srcH, c->chrSrcVSubSample);
1404 c->chrDstW = AV_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
1405 c->chrDstH = AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
1407 FF_ALLOCZ_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
1409 c->srcBpc = desc_src->comp[0].depth;
1412 c->dstBpc = desc_dst->comp[0].depth;
1415 if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8)
1417 if (c->dstBpc == 16)
1420 if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
1421 c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 &&
1422 c->chrDstW >= c->chrSrcW &&
1424 if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (srcW & 15) == 0
1426 && (flags & SWS_FAST_BILINEAR)) {
1427 if (flags & SWS_PRINT_INFO)
1428 av_log(c, AV_LOG_INFO,
1429 "output width is not a multiple of 32 -> no MMXEXT scaler\n");
1431 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat))
1432 c->canMMXEXTBeUsed = 0;
1434 c->canMMXEXTBeUsed = 0;
1436 c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW;
1437 c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH;
1439 /* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src
1440 * to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do
1442 * n-2 is the last chrominance sample available.
1443 * This is not perfect, but no one should notice the difference, the more
1444 * correct variant would be like the vertical one, but that would require
1445 * some special code for the first and last pixel */
1446 if (flags & SWS_FAST_BILINEAR) {
1447 if (c->canMMXEXTBeUsed) {
1451 // we don't use the x86 asm scaler if MMX is available
1452 else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) {
1453 c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
1454 c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20;
1458 // hardcoded for now
1459 c->gamma_value = 2.2;
1460 tmpFmt = AV_PIX_FMT_RGBA64LE;
1463 if (!unscaled && c->gamma_flag && (srcFormat != tmpFmt || dstFormat != tmpFmt)) {
1465 c->cascaded_context[0] = NULL;
1467 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1468 srcW, srcH, tmpFmt, 64);
1472 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1474 flags, NULL, NULL, c->param);
1475 if (!c->cascaded_context[0]) {
1479 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFmt,
1481 flags, srcFilter, dstFilter, c->param);
1483 if (!c->cascaded_context[1])
1486 c2 = c->cascaded_context[1];
1487 c2->is_internal_gamma = 1;
1488 c2->gamma = alloc_gamma_tbl( c->gamma_value);
1489 c2->inv_gamma = alloc_gamma_tbl(1.f/c->gamma_value);
1490 if (!c2->gamma || !c2->inv_gamma)
1491 return AVERROR(ENOMEM);
1493 // is_internal_flag is set after creating the context
1494 // to properly create the gamma convert FilterDescriptor
1495 // we have to re-initialize it
1496 ff_free_filters(c2);
1497 if (ff_init_filters(c2) < 0) {
1498 sws_freeContext(c2);
1502 c->cascaded_context[2] = NULL;
1503 if (dstFormat != tmpFmt) {
1504 ret = av_image_alloc(c->cascaded1_tmp, c->cascaded1_tmpStride,
1505 dstW, dstH, tmpFmt, 64);
1509 c->cascaded_context[2] = sws_getContext(dstW, dstH, tmpFmt,
1510 dstW, dstH, dstFormat,
1511 flags, NULL, NULL, c->param);
1512 if (!c->cascaded_context[2])
1518 if (isBayer(srcFormat)) {
1520 (dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
1521 enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
1523 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1524 srcW, srcH, tmpFormat, 64);
1528 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1529 srcW, srcH, tmpFormat,
1530 flags, srcFilter, NULL, c->param);
1531 if (!c->cascaded_context[0])
1534 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
1535 dstW, dstH, dstFormat,
1536 flags, NULL, dstFilter, c->param);
1537 if (!c->cascaded_context[1])
1543 if (unscaled && c->srcBpc == 8 && dstFormat == AV_PIX_FMT_GRAYF32){
1544 for (i = 0; i < 256; ++i){
1545 c->uint2float_lut[i] = (float)i * float_mult;
1549 // float will be converted to uint16_t
1550 if ((srcFormat == AV_PIX_FMT_GRAYF32BE || srcFormat == AV_PIX_FMT_GRAYF32LE) &&
1551 (!unscaled || unscaled && dstFormat != srcFormat && (srcFormat != AV_PIX_FMT_GRAYF32 ||
1552 dstFormat != AV_PIX_FMT_GRAY8))){
1556 if (CONFIG_SWSCALE_ALPHA && isALPHA(srcFormat) && !isALPHA(dstFormat)) {
1557 enum AVPixelFormat tmpFormat = alphaless_fmt(srcFormat);
1559 if (tmpFormat != AV_PIX_FMT_NONE && c->alphablend != SWS_ALPHA_BLEND_NONE)
1561 dstFormat != tmpFormat ||
1562 usesHFilter || usesVFilter ||
1563 c->srcRange != c->dstRange
1565 c->cascaded_mainindex = 1;
1566 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1567 srcW, srcH, tmpFormat, 64);
1571 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, srcFormat,
1572 srcW, srcH, tmpFormat,
1574 if (!c->cascaded_context[0])
1576 c->cascaded_context[0]->alphablend = c->alphablend;
1577 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
1581 c->cascaded_context[1] = sws_alloc_set_opts(srcW, srcH, tmpFormat,
1582 dstW, dstH, dstFormat,
1584 if (!c->cascaded_context[1])
1587 c->cascaded_context[1]->srcRange = c->srcRange;
1588 c->cascaded_context[1]->dstRange = c->dstRange;
1589 ret = sws_init_context(c->cascaded_context[1], srcFilter , dstFilter);
1597 #if HAVE_MMAP && HAVE_MPROTECT && defined(MAP_ANONYMOUS)
1603 /* precalculate horizontal scaler filter coefficients */
1605 #if HAVE_MMXEXT_INLINE
1606 // can't downscale !!!
1607 if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) {
1608 c->lumMmxextFilterCodeSize = ff_init_hscaler_mmxext(dstW, c->lumXInc, NULL,
1610 c->chrMmxextFilterCodeSize = ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc,
1611 NULL, NULL, NULL, 4);
1614 c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize,
1615 PROT_READ | PROT_WRITE,
1616 MAP_PRIVATE | MAP_ANONYMOUS,
1618 c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize,
1619 PROT_READ | PROT_WRITE,
1620 MAP_PRIVATE | MAP_ANONYMOUS,
1622 #elif HAVE_VIRTUALALLOC
1623 c->lumMmxextFilterCode = VirtualAlloc(NULL,
1624 c->lumMmxextFilterCodeSize,
1626 PAGE_EXECUTE_READWRITE);
1627 c->chrMmxextFilterCode = VirtualAlloc(NULL,
1628 c->chrMmxextFilterCodeSize,
1630 PAGE_EXECUTE_READWRITE);
1632 c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize);
1633 c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize);
1636 #ifdef MAP_ANONYMOUS
1637 if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED)
1639 if (!c->lumMmxextFilterCode || !c->chrMmxextFilterCode)
1642 av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
1643 return AVERROR(ENOMEM);
1646 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail);
1647 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail);
1648 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail);
1649 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail);
1651 ff_init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode,
1652 c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
1653 ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode,
1654 c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
1657 if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1
1658 || mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) {
1659 av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
1664 #endif /* HAVE_MMXEXT_INLINE */
1666 const int filterAlign = X86_MMX(cpu_flags) ? 4 :
1667 PPC_ALTIVEC(cpu_flags) ? 8 :
1668 have_neon(cpu_flags) ? 8 : 1;
1670 if ((ret = initFilter(&c->hLumFilter, &c->hLumFilterPos,
1671 &c->hLumFilterSize, c->lumXInc,
1672 srcW, dstW, filterAlign, 1 << 14,
1673 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1674 cpu_flags, srcFilter->lumH, dstFilter->lumH,
1676 get_local_pos(c, 0, 0, 0),
1677 get_local_pos(c, 0, 0, 0))) < 0)
1679 if ((ret = initFilter(&c->hChrFilter, &c->hChrFilterPos,
1680 &c->hChrFilterSize, c->chrXInc,
1681 c->chrSrcW, c->chrDstW, filterAlign, 1 << 14,
1682 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1683 cpu_flags, srcFilter->chrH, dstFilter->chrH,
1685 get_local_pos(c, c->chrSrcHSubSample, c->src_h_chr_pos, 0),
1686 get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0))) < 0)
1689 } // initialize horizontal stuff
1691 /* precalculate vertical scaler filter coefficients */
1693 const int filterAlign = X86_MMX(cpu_flags) ? 2 :
1694 PPC_ALTIVEC(cpu_flags) ? 8 :
1695 have_neon(cpu_flags) ? 2 : 1;
1697 if ((ret = initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize,
1698 c->lumYInc, srcH, dstH, filterAlign, (1 << 12),
1699 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1700 cpu_flags, srcFilter->lumV, dstFilter->lumV,
1702 get_local_pos(c, 0, 0, 1),
1703 get_local_pos(c, 0, 0, 1))) < 0)
1705 if ((ret = initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize,
1706 c->chrYInc, c->chrSrcH, c->chrDstH,
1707 filterAlign, (1 << 12),
1708 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1709 cpu_flags, srcFilter->chrV, dstFilter->chrV,
1711 get_local_pos(c, c->chrSrcVSubSample, c->src_v_chr_pos, 1),
1712 get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1))) < 0)
1717 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail);
1718 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail);
1720 for (i = 0; i < c->vLumFilterSize * c->dstH; i++) {
1722 short *p = (short *)&c->vYCoeffsBank[i];
1723 for (j = 0; j < 8; j++)
1724 p[j] = c->vLumFilter[i];
1727 for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) {
1729 short *p = (short *)&c->vCCoeffsBank[i];
1730 for (j = 0; j < 8; j++)
1731 p[j] = c->vChrFilter[i];
1736 for (i = 0; i < 4; i++)
1737 FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
1739 c->needAlpha = (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) ? 1 : 0;
1741 // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
1742 c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
1743 c->uv_offx2 = dst_stride + 16;
1745 av_assert0(c->chrDstH <= dstH);
1747 if (flags & SWS_PRINT_INFO) {
1748 const char *scaler = NULL, *cpucaps;
1750 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
1751 if (flags & scale_algorithms[i].flag) {
1752 scaler = scale_algorithms[i].description;
1757 scaler = "ehh flags invalid?!";
1758 av_log(c, AV_LOG_INFO, "%s scaler, from %s to %s%s ",
1760 av_get_pix_fmt_name(srcFormat),
1762 dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 ||
1763 dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE ||
1764 dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ?
1769 av_get_pix_fmt_name(dstFormat));
1771 if (INLINE_MMXEXT(cpu_flags))
1773 else if (INLINE_AMD3DNOW(cpu_flags))
1775 else if (INLINE_MMX(cpu_flags))
1777 else if (PPC_ALTIVEC(cpu_flags))
1778 cpucaps = "AltiVec";
1782 av_log(c, AV_LOG_INFO, "using %s\n", cpucaps);
1784 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1785 av_log(c, AV_LOG_DEBUG,
1786 "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1787 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1788 av_log(c, AV_LOG_DEBUG,
1789 "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1790 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH,
1791 c->chrXInc, c->chrYInc);
1794 /* alpha blend special case, note this has been split via cascaded contexts if its scaled */
1795 if (unscaled && !usesHFilter && !usesVFilter &&
1796 c->alphablend != SWS_ALPHA_BLEND_NONE &&
1797 isALPHA(srcFormat) &&
1798 (c->srcRange == c->dstRange || isAnyRGB(dstFormat)) &&
1799 alphaless_fmt(srcFormat) == dstFormat
1801 c->swscale = ff_sws_alphablendaway;
1803 if (flags & SWS_PRINT_INFO)
1804 av_log(c, AV_LOG_INFO,
1805 "using alpha blendaway %s -> %s special converter\n",
1806 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1810 /* unscaled special cases */
1811 if (unscaled && !usesHFilter && !usesVFilter &&
1812 (c->srcRange == c->dstRange || isAnyRGB(dstFormat) ||
1813 srcFormat == AV_PIX_FMT_GRAYF32 && dstFormat == AV_PIX_FMT_GRAY8 ||
1814 srcFormat == AV_PIX_FMT_GRAY8 && dstFormat == AV_PIX_FMT_GRAYF32)) {
1815 ff_get_unscaled_swscale(c);
1818 if (flags & SWS_PRINT_INFO)
1819 av_log(c, AV_LOG_INFO,
1820 "using unscaled %s -> %s special converter\n",
1821 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1826 c->swscale = ff_getSwsFunc(c);
1827 return ff_init_filters(c);
1828 fail: // FIXME replace things by appropriate error codes
1829 if (ret == RETCODE_USE_CASCADE) {
1830 int tmpW = sqrt(srcW * (int64_t)dstW);
1831 int tmpH = sqrt(srcH * (int64_t)dstH);
1832 enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P;
1834 if (isALPHA(srcFormat))
1835 tmpFormat = AV_PIX_FMT_YUVA420P;
1837 if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
1838 return AVERROR(EINVAL);
1840 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1841 tmpW, tmpH, tmpFormat, 64);
1845 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1846 tmpW, tmpH, tmpFormat,
1847 flags, srcFilter, NULL, c->param);
1848 if (!c->cascaded_context[0])
1851 c->cascaded_context[1] = sws_getContext(tmpW, tmpH, tmpFormat,
1852 dstW, dstH, dstFormat,
1853 flags, NULL, dstFilter, c->param);
1854 if (!c->cascaded_context[1])
1861 SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
1862 int dstW, int dstH, enum AVPixelFormat dstFormat,
1863 int flags, const double *param)
1867 if (!(c = sws_alloc_context()))
1875 c->srcFormat = srcFormat;
1876 c->dstFormat = dstFormat;
1879 c->param[0] = param[0];
1880 c->param[1] = param[1];
1886 SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
1887 int dstW, int dstH, enum AVPixelFormat dstFormat,
1888 int flags, SwsFilter *srcFilter,
1889 SwsFilter *dstFilter, const double *param)
1893 c = sws_alloc_set_opts(srcW, srcH, srcFormat,
1894 dstW, dstH, dstFormat,
1899 if (sws_init_context(c, srcFilter, dstFilter) < 0) {
1907 static int isnan_vec(SwsVector *a)
1910 for (i=0; i<a->length; i++)
1911 if (isnan(a->coeff[i]))
1916 static void makenan_vec(SwsVector *a)
1919 for (i=0; i<a->length; i++)
1923 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1924 float lumaSharpen, float chromaSharpen,
1925 float chromaHShift, float chromaVShift,
1928 SwsFilter *filter = av_malloc(sizeof(SwsFilter));
1932 if (lumaGBlur != 0.0) {
1933 filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0);
1934 filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0);
1936 filter->lumH = sws_getIdentityVec();
1937 filter->lumV = sws_getIdentityVec();
1940 if (chromaGBlur != 0.0) {
1941 filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0);
1942 filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0);
1944 filter->chrH = sws_getIdentityVec();
1945 filter->chrV = sws_getIdentityVec();
1948 if (!filter->lumH || !filter->lumV || !filter->chrH || !filter->chrV)
1951 if (chromaSharpen != 0.0) {
1952 SwsVector *id = sws_getIdentityVec();
1955 sws_scaleVec(filter->chrH, -chromaSharpen);
1956 sws_scaleVec(filter->chrV, -chromaSharpen);
1957 sws_addVec(filter->chrH, id);
1958 sws_addVec(filter->chrV, id);
1962 if (lumaSharpen != 0.0) {
1963 SwsVector *id = sws_getIdentityVec();
1966 sws_scaleVec(filter->lumH, -lumaSharpen);
1967 sws_scaleVec(filter->lumV, -lumaSharpen);
1968 sws_addVec(filter->lumH, id);
1969 sws_addVec(filter->lumV, id);
1973 if (chromaHShift != 0.0)
1974 sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5));
1976 if (chromaVShift != 0.0)
1977 sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5));
1979 sws_normalizeVec(filter->chrH, 1.0);
1980 sws_normalizeVec(filter->chrV, 1.0);
1981 sws_normalizeVec(filter->lumH, 1.0);
1982 sws_normalizeVec(filter->lumV, 1.0);
1984 if (isnan_vec(filter->chrH) ||
1985 isnan_vec(filter->chrV) ||
1986 isnan_vec(filter->lumH) ||
1987 isnan_vec(filter->lumV))
1991 sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1993 sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1998 sws_freeVec(filter->lumH);
1999 sws_freeVec(filter->lumV);
2000 sws_freeVec(filter->chrH);
2001 sws_freeVec(filter->chrV);
2006 SwsVector *sws_allocVec(int length)
2010 if(length <= 0 || length > INT_MAX/ sizeof(double))
2013 vec = av_malloc(sizeof(SwsVector));
2016 vec->length = length;
2017 vec->coeff = av_malloc(sizeof(double) * length);
2023 SwsVector *sws_getGaussianVec(double variance, double quality)
2025 const int length = (int)(variance * quality + 0.5) | 1;
2027 double middle = (length - 1) * 0.5;
2030 if(variance < 0 || quality < 0)
2033 vec = sws_allocVec(length);
2038 for (i = 0; i < length; i++) {
2039 double dist = i - middle;
2040 vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
2041 sqrt(2 * variance * M_PI);
2044 sws_normalizeVec(vec, 1.0);
2050 * Allocate and return a vector with length coefficients, all
2051 * with the same value c.
2053 #if !FF_API_SWS_VECTOR
2056 SwsVector *sws_getConstVec(double c, int length)
2059 SwsVector *vec = sws_allocVec(length);
2064 for (i = 0; i < length; i++)
2071 * Allocate and return a vector with just one coefficient, with
2074 #if !FF_API_SWS_VECTOR
2077 SwsVector *sws_getIdentityVec(void)
2079 return sws_getConstVec(1.0, 1);
2082 static double sws_dcVec(SwsVector *a)
2087 for (i = 0; i < a->length; i++)
2093 void sws_scaleVec(SwsVector *a, double scalar)
2097 for (i = 0; i < a->length; i++)
2098 a->coeff[i] *= scalar;
2101 void sws_normalizeVec(SwsVector *a, double height)
2103 sws_scaleVec(a, height / sws_dcVec(a));
2106 #if FF_API_SWS_VECTOR
2107 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
2109 int length = a->length + b->length - 1;
2111 SwsVector *vec = sws_getConstVec(0.0, length);
2116 for (i = 0; i < a->length; i++) {
2117 for (j = 0; j < b->length; j++) {
2118 vec->coeff[i + j] += a->coeff[i] * b->coeff[j];
2126 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
2128 int length = FFMAX(a->length, b->length);
2130 SwsVector *vec = sws_getConstVec(0.0, length);
2135 for (i = 0; i < a->length; i++)
2136 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2137 for (i = 0; i < b->length; i++)
2138 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i];
2143 #if FF_API_SWS_VECTOR
2144 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
2146 int length = FFMAX(a->length, b->length);
2148 SwsVector *vec = sws_getConstVec(0.0, length);
2153 for (i = 0; i < a->length; i++)
2154 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2155 for (i = 0; i < b->length; i++)
2156 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i];
2162 /* shift left / or right if "shift" is negative */
2163 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
2165 int length = a->length + FFABS(shift) * 2;
2167 SwsVector *vec = sws_getConstVec(0.0, length);
2172 for (i = 0; i < a->length; i++) {
2173 vec->coeff[i + (length - 1) / 2 -
2174 (a->length - 1) / 2 - shift] = a->coeff[i];
2180 #if !FF_API_SWS_VECTOR
2183 void sws_shiftVec(SwsVector *a, int shift)
2185 SwsVector *shifted = sws_getShiftedVec(a, shift);
2191 a->coeff = shifted->coeff;
2192 a->length = shifted->length;
2196 #if !FF_API_SWS_VECTOR
2199 void sws_addVec(SwsVector *a, SwsVector *b)
2201 SwsVector *sum = sws_sumVec(a, b);
2207 a->coeff = sum->coeff;
2208 a->length = sum->length;
2212 #if FF_API_SWS_VECTOR
2213 void sws_subVec(SwsVector *a, SwsVector *b)
2215 SwsVector *diff = sws_diffVec(a, b);
2221 a->coeff = diff->coeff;
2222 a->length = diff->length;
2226 void sws_convVec(SwsVector *a, SwsVector *b)
2228 SwsVector *conv = sws_getConvVec(a, b);
2234 a->coeff = conv->coeff;
2235 a->length = conv->length;
2239 SwsVector *sws_cloneVec(SwsVector *a)
2241 SwsVector *vec = sws_allocVec(a->length);
2246 memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff));
2253 * Print with av_log() a textual representation of the vector a
2254 * if log_level <= av_log_level.
2256 #if !FF_API_SWS_VECTOR
2259 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
2266 for (i = 0; i < a->length; i++)
2267 if (a->coeff[i] > max)
2270 for (i = 0; i < a->length; i++)
2271 if (a->coeff[i] < min)
2276 for (i = 0; i < a->length; i++) {
2277 int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5);
2278 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
2280 av_log(log_ctx, log_level, " ");
2281 av_log(log_ctx, log_level, "|\n");
2285 void sws_freeVec(SwsVector *a)
2289 av_freep(&a->coeff);
2294 void sws_freeFilter(SwsFilter *filter)
2299 sws_freeVec(filter->lumH);
2300 sws_freeVec(filter->lumV);
2301 sws_freeVec(filter->chrH);
2302 sws_freeVec(filter->chrV);
2306 void sws_freeContext(SwsContext *c)
2312 for (i = 0; i < 4; i++)
2313 av_freep(&c->dither_error[i]);
2315 av_freep(&c->vLumFilter);
2316 av_freep(&c->vChrFilter);
2317 av_freep(&c->hLumFilter);
2318 av_freep(&c->hChrFilter);
2320 av_freep(&c->vYCoeffsBank);
2321 av_freep(&c->vCCoeffsBank);
2324 av_freep(&c->vLumFilterPos);
2325 av_freep(&c->vChrFilterPos);
2326 av_freep(&c->hLumFilterPos);
2327 av_freep(&c->hChrFilterPos);
2331 if (c->lumMmxextFilterCode)
2332 munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize);
2333 if (c->chrMmxextFilterCode)
2334 munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize);
2335 #elif HAVE_VIRTUALALLOC
2336 if (c->lumMmxextFilterCode)
2337 VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE);
2338 if (c->chrMmxextFilterCode)
2339 VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE);
2341 av_free(c->lumMmxextFilterCode);
2342 av_free(c->chrMmxextFilterCode);
2344 c->lumMmxextFilterCode = NULL;
2345 c->chrMmxextFilterCode = NULL;
2346 #endif /* HAVE_MMX_INLINE */
2348 av_freep(&c->yuvTable);
2349 av_freep(&c->formatConvBuffer);
2351 sws_freeContext(c->cascaded_context[0]);
2352 sws_freeContext(c->cascaded_context[1]);
2353 sws_freeContext(c->cascaded_context[2]);
2354 memset(c->cascaded_context, 0, sizeof(c->cascaded_context));
2355 av_freep(&c->cascaded_tmp[0]);
2356 av_freep(&c->cascaded1_tmp[0]);
2358 av_freep(&c->gamma);
2359 av_freep(&c->inv_gamma);
2366 struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
2367 int srcH, enum AVPixelFormat srcFormat,
2369 enum AVPixelFormat dstFormat, int flags,
2370 SwsFilter *srcFilter,
2371 SwsFilter *dstFilter,
2372 const double *param)
2374 static const double default_param[2] = { SWS_PARAM_DEFAULT,
2375 SWS_PARAM_DEFAULT };
2376 int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513,
2377 src_v_chr_pos = -513, dst_v_chr_pos = -513;
2380 param = default_param;
2383 (context->srcW != srcW ||
2384 context->srcH != srcH ||
2385 context->srcFormat != srcFormat ||
2386 context->dstW != dstW ||
2387 context->dstH != dstH ||
2388 context->dstFormat != dstFormat ||
2389 context->flags != flags ||
2390 context->param[0] != param[0] ||
2391 context->param[1] != param[1])) {
2393 av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos);
2394 av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos);
2395 av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos);
2396 av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos);
2397 sws_freeContext(context);
2402 if (!(context = sws_alloc_context()))
2404 context->srcW = srcW;
2405 context->srcH = srcH;
2406 context->srcFormat = srcFormat;
2407 context->dstW = dstW;
2408 context->dstH = dstH;
2409 context->dstFormat = dstFormat;
2410 context->flags = flags;
2411 context->param[0] = param[0];
2412 context->param[1] = param[1];
2414 av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0);
2415 av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0);
2416 av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0);
2417 av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0);
2419 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
2420 sws_freeContext(context);