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 },
269 int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
271 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
272 format_entries[pix_fmt].is_supported_in : 0;
275 int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
277 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
278 format_entries[pix_fmt].is_supported_out : 0;
281 int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
283 return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
284 format_entries[pix_fmt].is_supported_endianness : 0;
287 static double getSplineCoeff(double a, double b, double c, double d,
291 return ((d * dist + c) * dist + b) * dist + a;
293 return getSplineCoeff(0.0,
294 b + 2.0 * c + 3.0 * d,
296 -b - 3.0 * c - 6.0 * d,
300 static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
302 if (pos == -1 || pos <= -513) {
303 pos = (128 << chr_subsample) - 128;
305 pos += 128; // relative to ideal left edge
306 return pos >> chr_subsample;
310 int flag; ///< flag associated to the algorithm
311 const char *description; ///< human-readable description
312 int size_factor; ///< size factor used when initing the filters
315 static const ScaleAlgorithm scale_algorithms[] = {
316 { SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ },
317 { SWS_BICUBIC, "bicubic", 4 },
318 { SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 },
319 { SWS_BILINEAR, "bilinear", 2 },
320 { SWS_FAST_BILINEAR, "fast bilinear", -1 },
321 { SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ },
322 { SWS_LANCZOS, "Lanczos", -1 /* custom */ },
323 { SWS_POINT, "nearest neighbor / point", -1 },
324 { SWS_SINC, "sinc", 20 /* infinite ;) */ },
325 { SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ },
326 { SWS_X, "experimental", 8 },
329 static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
330 int *outFilterSize, int xInc, int srcW,
331 int dstW, int filterAlign, int one,
332 int flags, int cpu_flags,
333 SwsVector *srcFilter, SwsVector *dstFilter,
334 double param[2], int srcPos, int dstPos)
340 int64_t *filter = NULL;
341 int64_t *filter2 = NULL;
342 const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
345 emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
347 // NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
348 FF_ALLOC_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail);
350 if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
353 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter,
354 dstW, sizeof(*filter) * filterSize, fail);
356 for (i = 0; i < dstW; i++) {
357 filter[i * filterSize] = fone;
360 } else if (flags & SWS_POINT) { // lame looking point sampling mode
364 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
365 dstW, sizeof(*filter) * filterSize, fail);
367 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
368 for (i = 0; i < dstW; i++) {
369 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
371 (*filterPos)[i] = xx;
375 } else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) ||
376 (flags & SWS_FAST_BILINEAR)) { // bilinear upscale
380 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
381 dstW, sizeof(*filter) * filterSize, fail);
383 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
384 for (i = 0; i < dstW; i++) {
385 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
388 (*filterPos)[i] = xx;
389 // bilinear upscale / linear interpolate / area averaging
390 for (j = 0; j < filterSize; j++) {
391 int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
394 filter[i * filterSize + j] = coeff;
403 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
404 if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) {
405 sizeFactor = scale_algorithms[i].size_factor;
409 if (flags & SWS_LANCZOS)
410 sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
411 av_assert0(sizeFactor > 0);
414 filterSize = 1 + sizeFactor; // upscale
416 filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
418 filterSize = FFMIN(filterSize, srcW - 2);
419 filterSize = FFMAX(filterSize, 1);
421 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
422 dstW, sizeof(*filter) * filterSize, fail);
424 xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
425 for (i = 0; i < dstW; i++) {
426 int xx = (xDstInSrc - (filterSize - 2) * (1LL<<16)) / (1 << 17);
428 (*filterPos)[i] = xx;
429 for (j = 0; j < filterSize; j++) {
430 int64_t d = (FFABS(((int64_t)xx * (1 << 17)) - xDstInSrc)) << 13;
436 floatd = d * (1.0 / (1 << 30));
438 if (flags & SWS_BICUBIC) {
439 int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
440 int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
442 if (d >= 1LL << 31) {
445 int64_t dd = (d * d) >> 30;
446 int64_t ddd = (dd * d) >> 30;
449 coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
450 (-18 * (1 << 24) + 12 * B + 6 * C) * dd +
451 (6 * (1 << 24) - 2 * B) * (1 << 30);
453 coeff = (-B - 6 * C) * ddd +
454 (6 * B + 30 * C) * dd +
455 (-12 * B - 48 * C) * d +
456 (8 * B + 24 * C) * (1 << 30);
458 coeff /= (1LL<<54)/fone;
459 } else if (flags & SWS_X) {
460 double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
464 c = cos(floatd * M_PI);
471 coeff = (c * 0.5 + 0.5) * fone;
472 } else if (flags & SWS_AREA) {
473 int64_t d2 = d - (1 << 29);
474 if (d2 * xInc < -(1LL << (29 + 16)))
475 coeff = 1.0 * (1LL << (30 + 16));
476 else if (d2 * xInc < (1LL << (29 + 16)))
477 coeff = -d2 * xInc + (1LL << (29 + 16));
480 coeff *= fone >> (30 + 16);
481 } else if (flags & SWS_GAUSS) {
482 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
483 coeff = exp2(-p * floatd * floatd) * fone;
484 } else if (flags & SWS_SINC) {
485 coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone;
486 } else if (flags & SWS_LANCZOS) {
487 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
488 coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) /
489 (floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
492 } else if (flags & SWS_BILINEAR) {
493 coeff = (1 << 30) - d;
497 } else if (flags & SWS_SPLINE) {
498 double p = -2.196152422706632;
499 coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone;
504 filter[i * filterSize + j] = coeff;
507 xDstInSrc += 2 * xInc;
511 /* apply src & dst Filter to filter -> filter2
514 av_assert0(filterSize > 0);
515 filter2Size = filterSize;
517 filter2Size += srcFilter->length - 1;
519 filter2Size += dstFilter->length - 1;
520 av_assert0(filter2Size > 0);
521 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter2, dstW, filter2Size * sizeof(*filter2), fail);
523 for (i = 0; i < dstW; i++) {
527 for (k = 0; k < srcFilter->length; k++) {
528 for (j = 0; j < filterSize; j++)
529 filter2[i * filter2Size + k + j] +=
530 srcFilter->coeff[k] * filter[i * filterSize + j];
533 for (j = 0; j < filterSize; j++)
534 filter2[i * filter2Size + j] = filter[i * filterSize + j];
538 (*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
542 /* try to reduce the filter-size (step1 find size and shift left) */
543 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
545 for (i = dstW - 1; i >= 0; i--) {
546 int min = filter2Size;
548 int64_t cutOff = 0.0;
550 /* get rid of near zero elements on the left by shifting left */
551 for (j = 0; j < filter2Size; j++) {
553 cutOff += FFABS(filter2[i * filter2Size]);
555 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
558 /* preserve monotonicity because the core can't handle the
559 * filter otherwise */
560 if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1])
563 // move filter coefficients left
564 for (k = 1; k < filter2Size; k++)
565 filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
566 filter2[i * filter2Size + k - 1] = 0;
571 /* count near zeros on the right */
572 for (j = filter2Size - 1; j > 0; j--) {
573 cutOff += FFABS(filter2[i * filter2Size + j]);
575 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
580 if (min > minFilterSize)
584 if (PPC_ALTIVEC(cpu_flags)) {
585 // we can handle the special case 4, so we don't want to go the full 8
586 if (minFilterSize < 5)
589 /* We really don't want to waste our time doing useless computation, so
590 * fall back on the scalar C code for very small filters.
591 * Vectorizing is worth it only if you have a decent-sized vector. */
592 if (minFilterSize < 3)
596 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
597 // special case for unscaled vertical filtering
598 if (minFilterSize == 1 && filterAlign == 2)
602 av_assert0(minFilterSize > 0);
603 filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
604 av_assert0(filterSize > 0);
605 filter = av_malloc_array(dstW, filterSize * sizeof(*filter));
608 if (filterSize >= MAX_FILTER_SIZE * 16 /
609 ((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16)) {
610 ret = RETCODE_USE_CASCADE;
613 *outFilterSize = filterSize;
615 if (flags & SWS_PRINT_INFO)
616 av_log(NULL, AV_LOG_VERBOSE,
617 "SwScaler: reducing / aligning filtersize %d -> %d\n",
618 filter2Size, filterSize);
619 /* try to reduce the filter-size (step2 reduce it) */
620 for (i = 0; i < dstW; i++) {
623 for (j = 0; j < filterSize; j++) {
624 if (j >= filter2Size)
625 filter[i * filterSize + j] = 0;
627 filter[i * filterSize + j] = filter2[i * filter2Size + j];
628 if ((flags & SWS_BITEXACT) && j >= minFilterSize)
629 filter[i * filterSize + j] = 0;
633 // FIXME try to align filterPos if possible
636 for (i = 0; i < dstW; i++) {
638 if ((*filterPos)[i] < 0) {
639 // move filter coefficients left to compensate for filterPos
640 for (j = 1; j < filterSize; j++) {
641 int left = FFMAX(j + (*filterPos)[i], 0);
642 filter[i * filterSize + left] += filter[i * filterSize + j];
643 filter[i * filterSize + j] = 0;
648 if ((*filterPos)[i] + filterSize > srcW) {
649 int shift = (*filterPos)[i] + FFMIN(filterSize - srcW, 0);
652 for (j = filterSize - 1; j >= 0; j--) {
653 if ((*filterPos)[i] + j >= srcW) {
654 acc += filter[i * filterSize + j];
655 filter[i * filterSize + j] = 0;
658 for (j = filterSize - 1; j >= 0; j--) {
660 filter[i * filterSize + j] = 0;
662 filter[i * filterSize + j] = filter[i * filterSize + j - shift];
666 (*filterPos)[i]-= shift;
667 filter[i * filterSize + srcW - 1 - (*filterPos)[i]] += acc;
669 av_assert0((*filterPos)[i] >= 0);
670 av_assert0((*filterPos)[i] < srcW);
671 if ((*filterPos)[i] + filterSize > srcW) {
672 for (j = 0; j < filterSize; j++) {
673 av_assert0((*filterPos)[i] + j < srcW || !filter[i * filterSize + j]);
678 // Note the +1 is for the MMX scaler which reads over the end
679 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
680 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, *outFilter,
681 (dstW + 3), *outFilterSize * sizeof(int16_t), fail);
683 /* normalize & store in outFilter */
684 for (i = 0; i < dstW; i++) {
689 for (j = 0; j < filterSize; j++) {
690 sum += filter[i * filterSize + j];
692 sum = (sum + one / 2) / one;
694 av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n");
697 for (j = 0; j < *outFilterSize; j++) {
698 int64_t v = filter[i * filterSize + j] + error;
699 int intV = ROUNDED_DIV(v, sum);
700 (*outFilter)[i * (*outFilterSize) + j] = intV;
701 error = v - intV * sum;
705 (*filterPos)[dstW + 0] =
706 (*filterPos)[dstW + 1] =
707 (*filterPos)[dstW + 2] = (*filterPos)[dstW - 1]; /* the MMX/SSE scaler will
708 * read over the end */
709 for (i = 0; i < *outFilterSize; i++) {
710 int k = (dstW - 1) * (*outFilterSize) + i;
711 (*outFilter)[k + 1 * (*outFilterSize)] =
712 (*outFilter)[k + 2 * (*outFilterSize)] =
713 (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
720 av_log(NULL, ret == RETCODE_USE_CASCADE ? AV_LOG_DEBUG : AV_LOG_ERROR, "sws: initFilter failed\n");
726 static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
728 int64_t W, V, Z, Cy, Cu, Cv;
729 int64_t vr = table[0];
730 int64_t ub = table[1];
731 int64_t ug = -table[2];
732 int64_t vg = -table[3];
735 uint8_t *p = (uint8_t*)c->input_rgb2yuv_table;
737 static const int8_t map[] = {
738 BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX,
739 RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX,
740 RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX,
741 BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX,
742 BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX,
743 RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX,
744 RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX,
745 BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX,
746 BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX,
747 RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX,
748 RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX,
749 BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX,
750 RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX,
751 BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX,
752 GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 ,
753 -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX,
754 RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX,
755 BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX,
756 GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 ,
757 -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX,
758 RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX,
759 BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX,
760 GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 ,
761 -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23
762 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24
763 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25
764 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26
765 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27
766 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28
767 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29
768 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30
769 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31
770 BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32
771 BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33
772 BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34
775 dstRange = 0; //FIXME range = 1 is handled elsewhere
785 W = ROUNDED_DIV(ONE*ONE*ug, ub);
786 V = ROUNDED_DIV(ONE*ONE*vg, vr);
789 Cy = ROUNDED_DIV(cy*Z, ONE);
790 Cu = ROUNDED_DIV(ub*Z, ONE);
791 Cv = ROUNDED_DIV(vr*Z, ONE);
793 c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy);
794 c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cy);
795 c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy);
797 c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu);
798 c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cu);
799 c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu);
801 c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv);
802 c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cv);
803 c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv);
805 if(/*!dstRange && */!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) {
806 c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
807 c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
808 c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
809 c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
810 c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
811 c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
812 c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
813 c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
814 c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
816 for(i=0; i<FF_ARRAY_ELEMS(map); i++)
817 AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0);
820 static void fill_xyztables(struct SwsContext *c)
823 double xyzgamma = XYZ_GAMMA;
824 double rgbgamma = 1.0 / RGB_GAMMA;
825 double xyzgammainv = 1.0 / XYZ_GAMMA;
826 double rgbgammainv = RGB_GAMMA;
827 static const int16_t xyz2rgb_matrix[3][4] = {
828 {13270, -6295, -2041},
830 { 228, -835, 4329} };
831 static const int16_t rgb2xyz_matrix[3][4] = {
835 static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
837 memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
838 memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix));
839 c->xyzgamma = xyzgamma_tab;
840 c->rgbgamma = rgbgamma_tab;
841 c->xyzgammainv = xyzgammainv_tab;
842 c->rgbgammainv = rgbgammainv_tab;
844 if (rgbgamma_tab[4095])
847 /* set gamma vectors */
848 for (i = 0; i < 4096; i++) {
849 xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
850 rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
851 xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
852 rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
856 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
857 int srcRange, const int table[4], int dstRange,
858 int brightness, int contrast, int saturation)
860 const AVPixFmtDescriptor *desc_dst;
861 const AVPixFmtDescriptor *desc_src;
865 desc_dst = av_pix_fmt_desc_get(c->dstFormat);
866 desc_src = av_pix_fmt_desc_get(c->srcFormat);
868 if(!isYUV(c->dstFormat) && !isGray(c->dstFormat))
870 if(!isYUV(c->srcFormat) && !isGray(c->srcFormat))
873 if (c->srcRange != srcRange ||
874 c->dstRange != dstRange ||
875 c->brightness != brightness ||
876 c->contrast != contrast ||
877 c->saturation != saturation ||
878 memcmp(c->srcColorspaceTable, inv_table, sizeof(int) * 4) ||
879 memcmp(c->dstColorspaceTable, table, sizeof(int) * 4)
883 memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4);
884 memmove(c->dstColorspaceTable, table, sizeof(int) * 4);
888 c->brightness = brightness;
889 c->contrast = contrast;
890 c->saturation = saturation;
891 c->srcRange = srcRange;
892 c->dstRange = dstRange;
894 //The srcBpc check is possibly wrong but we seem to lack a definitive reference to test this
895 //and what we have in ticket 2939 looks better with this check
896 if (need_reinit && (c->srcBpc == 8 || !isYUV(c->srcFormat)))
897 ff_sws_init_range_convert(c);
899 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
900 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
902 if (c->cascaded_context[c->cascaded_mainindex])
903 return sws_setColorspaceDetails(c->cascaded_context[c->cascaded_mainindex],inv_table, srcRange,table, dstRange, brightness, contrast, saturation);
908 if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat))) {
909 if (!c->cascaded_context[0] &&
910 memcmp(c->dstColorspaceTable, c->srcColorspaceTable, sizeof(int) * 4) &&
911 c->srcW && c->srcH && c->dstW && c->dstH) {
912 enum AVPixelFormat tmp_format;
913 int tmp_width, tmp_height;
919 av_log(c, AV_LOG_VERBOSE, "YUV color matrix differs for YUV->YUV, using intermediate RGB to convert\n");
921 if (isNBPS(c->dstFormat) || is16BPS(c->dstFormat)) {
922 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
923 tmp_format = AV_PIX_FMT_BGRA64;
925 tmp_format = AV_PIX_FMT_BGR48;
928 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
929 tmp_format = AV_PIX_FMT_BGRA;
931 tmp_format = AV_PIX_FMT_BGR24;
935 if (srcW*srcH > dstW*dstH) {
943 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
944 tmp_width, tmp_height, tmp_format, 64);
948 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, c->srcFormat,
949 tmp_width, tmp_height, tmp_format,
951 if (!c->cascaded_context[0])
954 c->cascaded_context[0]->alphablend = c->alphablend;
955 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
958 //we set both src and dst depending on that the RGB side will be ignored
959 sws_setColorspaceDetails(c->cascaded_context[0], inv_table,
960 srcRange, table, dstRange,
961 brightness, contrast, saturation);
963 c->cascaded_context[1] = sws_getContext(tmp_width, tmp_height, tmp_format,
964 dstW, dstH, c->dstFormat,
965 c->flags, NULL, NULL, c->param);
966 if (!c->cascaded_context[1])
968 sws_setColorspaceDetails(c->cascaded_context[1], inv_table,
969 srcRange, table, dstRange,
970 0, 1 << 16, 1 << 16);
976 if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) {
977 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness,
978 contrast, saturation);
982 ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness,
983 contrast, saturation);
986 fill_rgb2yuv_table(c, table, dstRange);
991 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
992 int *srcRange, int **table, int *dstRange,
993 int *brightness, int *contrast, int *saturation)
998 *inv_table = c->srcColorspaceTable;
999 *table = c->dstColorspaceTable;
1000 *srcRange = c->srcRange;
1001 *dstRange = c->dstRange;
1002 *brightness = c->brightness;
1003 *contrast = c->contrast;
1004 *saturation = c->saturation;
1009 static int handle_jpeg(enum AVPixelFormat *format)
1012 case AV_PIX_FMT_YUVJ420P:
1013 *format = AV_PIX_FMT_YUV420P;
1015 case AV_PIX_FMT_YUVJ411P:
1016 *format = AV_PIX_FMT_YUV411P;
1018 case AV_PIX_FMT_YUVJ422P:
1019 *format = AV_PIX_FMT_YUV422P;
1021 case AV_PIX_FMT_YUVJ444P:
1022 *format = AV_PIX_FMT_YUV444P;
1024 case AV_PIX_FMT_YUVJ440P:
1025 *format = AV_PIX_FMT_YUV440P;
1027 case AV_PIX_FMT_GRAY8:
1028 case AV_PIX_FMT_YA8:
1029 case AV_PIX_FMT_GRAY9LE:
1030 case AV_PIX_FMT_GRAY9BE:
1031 case AV_PIX_FMT_GRAY10LE:
1032 case AV_PIX_FMT_GRAY10BE:
1033 case AV_PIX_FMT_GRAY12LE:
1034 case AV_PIX_FMT_GRAY12BE:
1035 case AV_PIX_FMT_GRAY14LE:
1036 case AV_PIX_FMT_GRAY14BE:
1037 case AV_PIX_FMT_GRAY16LE:
1038 case AV_PIX_FMT_GRAY16BE:
1039 case AV_PIX_FMT_YA16BE:
1040 case AV_PIX_FMT_YA16LE:
1047 static int handle_0alpha(enum AVPixelFormat *format)
1050 case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
1051 case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
1052 case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
1053 case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
1058 static int handle_xyz(enum AVPixelFormat *format)
1061 case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
1062 case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
1067 static void handle_formats(SwsContext *c)
1069 c->src0Alpha |= handle_0alpha(&c->srcFormat);
1070 c->dst0Alpha |= handle_0alpha(&c->dstFormat);
1071 c->srcXYZ |= handle_xyz(&c->srcFormat);
1072 c->dstXYZ |= handle_xyz(&c->dstFormat);
1073 if (c->srcXYZ || c->dstXYZ)
1077 SwsContext *sws_alloc_context(void)
1079 SwsContext *c = av_mallocz(sizeof(SwsContext));
1081 av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32));
1084 c->av_class = &ff_sws_context_class;
1085 av_opt_set_defaults(c);
1091 static uint16_t * alloc_gamma_tbl(double e)
1095 tbl = (uint16_t*)av_malloc(sizeof(uint16_t) * 1 << 16);
1099 for (i = 0; i < 65536; ++i) {
1100 tbl[i] = pow(i / 65535.0, e) * 65535.0;
1105 static enum AVPixelFormat alphaless_fmt(enum AVPixelFormat fmt)
1108 case AV_PIX_FMT_ARGB: return AV_PIX_FMT_RGB24;
1109 case AV_PIX_FMT_RGBA: return AV_PIX_FMT_RGB24;
1110 case AV_PIX_FMT_ABGR: return AV_PIX_FMT_BGR24;
1111 case AV_PIX_FMT_BGRA: return AV_PIX_FMT_BGR24;
1112 case AV_PIX_FMT_YA8: return AV_PIX_FMT_GRAY8;
1114 case AV_PIX_FMT_YUVA420P: return AV_PIX_FMT_YUV420P;
1115 case AV_PIX_FMT_YUVA422P: return AV_PIX_FMT_YUV422P;
1116 case AV_PIX_FMT_YUVA444P: return AV_PIX_FMT_YUV444P;
1118 case AV_PIX_FMT_GBRAP: return AV_PIX_FMT_GBRP;
1120 case AV_PIX_FMT_GBRAP10LE: return AV_PIX_FMT_GBRP10;
1121 case AV_PIX_FMT_GBRAP10BE: return AV_PIX_FMT_GBRP10;
1123 case AV_PIX_FMT_GBRAP12LE: return AV_PIX_FMT_GBRP12;
1124 case AV_PIX_FMT_GBRAP12BE: return AV_PIX_FMT_GBRP12;
1126 case AV_PIX_FMT_GBRAP16LE: return AV_PIX_FMT_GBRP16;
1127 case AV_PIX_FMT_GBRAP16BE: return AV_PIX_FMT_GBRP16;
1129 case AV_PIX_FMT_RGBA64LE: return AV_PIX_FMT_RGB48;
1130 case AV_PIX_FMT_RGBA64BE: return AV_PIX_FMT_RGB48;
1131 case AV_PIX_FMT_BGRA64LE: return AV_PIX_FMT_BGR48;
1132 case AV_PIX_FMT_BGRA64BE: return AV_PIX_FMT_BGR48;
1134 case AV_PIX_FMT_YA16BE: return AV_PIX_FMT_GRAY16;
1135 case AV_PIX_FMT_YA16LE: return AV_PIX_FMT_GRAY16;
1137 case AV_PIX_FMT_YUVA420P9BE: return AV_PIX_FMT_YUV420P9;
1138 case AV_PIX_FMT_YUVA422P9BE: return AV_PIX_FMT_YUV422P9;
1139 case AV_PIX_FMT_YUVA444P9BE: return AV_PIX_FMT_YUV444P9;
1140 case AV_PIX_FMT_YUVA420P9LE: return AV_PIX_FMT_YUV420P9;
1141 case AV_PIX_FMT_YUVA422P9LE: return AV_PIX_FMT_YUV422P9;
1142 case AV_PIX_FMT_YUVA444P9LE: return AV_PIX_FMT_YUV444P9;
1143 case AV_PIX_FMT_YUVA420P10BE: return AV_PIX_FMT_YUV420P10;
1144 case AV_PIX_FMT_YUVA422P10BE: return AV_PIX_FMT_YUV422P10;
1145 case AV_PIX_FMT_YUVA444P10BE: return AV_PIX_FMT_YUV444P10;
1146 case AV_PIX_FMT_YUVA420P10LE: return AV_PIX_FMT_YUV420P10;
1147 case AV_PIX_FMT_YUVA422P10LE: return AV_PIX_FMT_YUV422P10;
1148 case AV_PIX_FMT_YUVA444P10LE: return AV_PIX_FMT_YUV444P10;
1149 case AV_PIX_FMT_YUVA420P16BE: return AV_PIX_FMT_YUV420P16;
1150 case AV_PIX_FMT_YUVA422P16BE: return AV_PIX_FMT_YUV422P16;
1151 case AV_PIX_FMT_YUVA444P16BE: return AV_PIX_FMT_YUV444P16;
1152 case AV_PIX_FMT_YUVA420P16LE: return AV_PIX_FMT_YUV420P16;
1153 case AV_PIX_FMT_YUVA422P16LE: return AV_PIX_FMT_YUV422P16;
1154 case AV_PIX_FMT_YUVA444P16LE: return AV_PIX_FMT_YUV444P16;
1156 // case AV_PIX_FMT_AYUV64LE:
1157 // case AV_PIX_FMT_AYUV64BE:
1158 // case AV_PIX_FMT_PAL8:
1159 default: return AV_PIX_FMT_NONE;
1163 av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
1164 SwsFilter *dstFilter)
1167 int usesVFilter, usesHFilter;
1169 SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
1174 int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
1175 int flags, cpu_flags;
1176 enum AVPixelFormat srcFormat = c->srcFormat;
1177 enum AVPixelFormat dstFormat = c->dstFormat;
1178 const AVPixFmtDescriptor *desc_src;
1179 const AVPixFmtDescriptor *desc_dst;
1181 enum AVPixelFormat tmpFmt;
1182 static const float float_mult = 1.0f / 255.0f;
1184 cpu_flags = av_get_cpu_flags();
1188 ff_sws_rgb2rgb_init();
1190 unscaled = (srcW == dstW && srcH == dstH);
1192 c->srcRange |= handle_jpeg(&c->srcFormat);
1193 c->dstRange |= handle_jpeg(&c->dstFormat);
1195 if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat)
1196 av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
1198 if (!c->contrast && !c->saturation && !c->dstFormatBpp)
1199 sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
1200 ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
1201 c->dstRange, 0, 1 << 16, 1 << 16);
1204 srcFormat = c->srcFormat;
1205 dstFormat = c->dstFormat;
1206 desc_src = av_pix_fmt_desc_get(srcFormat);
1207 desc_dst = av_pix_fmt_desc_get(dstFormat);
1209 // If the source has no alpha then disable alpha blendaway
1211 c->alphablend = SWS_ALPHA_BLEND_NONE;
1213 if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
1214 av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
1215 if (!sws_isSupportedInput(srcFormat)) {
1216 av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
1217 av_get_pix_fmt_name(srcFormat));
1218 return AVERROR(EINVAL);
1220 if (!sws_isSupportedOutput(dstFormat)) {
1221 av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
1222 av_get_pix_fmt_name(dstFormat));
1223 return AVERROR(EINVAL);
1226 av_assert2(desc_src && desc_dst);
1228 i = flags & (SWS_POINT |
1240 /* provide a default scaler if not set by caller */
1242 if (dstW < srcW && dstH < srcH)
1243 flags |= SWS_BICUBIC;
1244 else if (dstW > srcW && dstH > srcH)
1245 flags |= SWS_BICUBIC;
1247 flags |= SWS_BICUBIC;
1249 } else if (i & (i - 1)) {
1250 av_log(c, AV_LOG_ERROR,
1251 "Exactly one scaler algorithm must be chosen, got %X\n", i);
1252 return AVERROR(EINVAL);
1255 if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) {
1256 /* FIXME check if these are enough and try to lower them after
1257 * fixing the relevant parts of the code */
1258 av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
1259 srcW, srcH, dstW, dstH);
1260 return AVERROR(EINVAL);
1262 if (flags & SWS_FAST_BILINEAR) {
1263 if (srcW < 8 || dstW < 8) {
1264 flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
1270 dstFilter = &dummyFilter;
1272 srcFilter = &dummyFilter;
1274 c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
1275 c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
1276 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
1277 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
1278 c->vRounder = 4 * 0x0001000100010001ULL;
1280 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) ||
1281 (srcFilter->chrV && srcFilter->chrV->length > 1) ||
1282 (dstFilter->lumV && dstFilter->lumV->length > 1) ||
1283 (dstFilter->chrV && dstFilter->chrV->length > 1);
1284 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) ||
1285 (srcFilter->chrH && srcFilter->chrH->length > 1) ||
1286 (dstFilter->lumH && dstFilter->lumH->length > 1) ||
1287 (dstFilter->chrH && dstFilter->chrH->length > 1);
1289 av_pix_fmt_get_chroma_sub_sample(srcFormat, &c->chrSrcHSubSample, &c->chrSrcVSubSample);
1290 av_pix_fmt_get_chroma_sub_sample(dstFormat, &c->chrDstHSubSample, &c->chrDstVSubSample);
1292 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
1294 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
1295 flags |= SWS_FULL_CHR_H_INT;
1299 if ( c->chrSrcHSubSample == 0
1300 && c->chrSrcVSubSample == 0
1301 && c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER
1302 && !(c->flags & SWS_FAST_BILINEAR)
1304 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n");
1305 flags |= SWS_FULL_CHR_H_INT;
1310 if (c->dither == SWS_DITHER_AUTO) {
1311 if (flags & SWS_ERROR_DIFFUSION)
1312 c->dither = SWS_DITHER_ED;
1315 if(dstFormat == AV_PIX_FMT_BGR4_BYTE ||
1316 dstFormat == AV_PIX_FMT_RGB4_BYTE ||
1317 dstFormat == AV_PIX_FMT_BGR8 ||
1318 dstFormat == AV_PIX_FMT_RGB8) {
1319 if (c->dither == SWS_DITHER_AUTO)
1320 c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
1321 if (!(flags & SWS_FULL_CHR_H_INT)) {
1322 if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER) {
1323 av_log(c, AV_LOG_DEBUG,
1324 "Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
1325 av_get_pix_fmt_name(dstFormat));
1326 flags |= SWS_FULL_CHR_H_INT;
1330 if (flags & SWS_FULL_CHR_H_INT) {
1331 if (c->dither == SWS_DITHER_BAYER) {
1332 av_log(c, AV_LOG_DEBUG,
1333 "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
1334 av_get_pix_fmt_name(dstFormat));
1335 c->dither = SWS_DITHER_ED;
1339 if (isPlanarRGB(dstFormat)) {
1340 if (!(flags & SWS_FULL_CHR_H_INT)) {
1341 av_log(c, AV_LOG_DEBUG,
1342 "%s output is not supported with half chroma resolution, switching to full\n",
1343 av_get_pix_fmt_name(dstFormat));
1344 flags |= SWS_FULL_CHR_H_INT;
1349 /* reuse chroma for 2 pixels RGB/BGR unless user wants full
1350 * chroma interpolation */
1351 if (flags & SWS_FULL_CHR_H_INT &&
1352 isAnyRGB(dstFormat) &&
1353 !isPlanarRGB(dstFormat) &&
1354 dstFormat != AV_PIX_FMT_RGBA64LE &&
1355 dstFormat != AV_PIX_FMT_RGBA64BE &&
1356 dstFormat != AV_PIX_FMT_BGRA64LE &&
1357 dstFormat != AV_PIX_FMT_BGRA64BE &&
1358 dstFormat != AV_PIX_FMT_RGB48LE &&
1359 dstFormat != AV_PIX_FMT_RGB48BE &&
1360 dstFormat != AV_PIX_FMT_BGR48LE &&
1361 dstFormat != AV_PIX_FMT_BGR48BE &&
1362 dstFormat != AV_PIX_FMT_RGBA &&
1363 dstFormat != AV_PIX_FMT_ARGB &&
1364 dstFormat != AV_PIX_FMT_BGRA &&
1365 dstFormat != AV_PIX_FMT_ABGR &&
1366 dstFormat != AV_PIX_FMT_RGB24 &&
1367 dstFormat != AV_PIX_FMT_BGR24 &&
1368 dstFormat != AV_PIX_FMT_BGR4_BYTE &&
1369 dstFormat != AV_PIX_FMT_RGB4_BYTE &&
1370 dstFormat != AV_PIX_FMT_BGR8 &&
1371 dstFormat != AV_PIX_FMT_RGB8
1373 av_log(c, AV_LOG_WARNING,
1374 "full chroma interpolation for destination format '%s' not yet implemented\n",
1375 av_get_pix_fmt_name(dstFormat));
1376 flags &= ~SWS_FULL_CHR_H_INT;
1379 if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
1380 c->chrDstHSubSample = 1;
1382 // drop some chroma lines if the user wants it
1383 c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >>
1384 SWS_SRC_V_CHR_DROP_SHIFT;
1385 c->chrSrcVSubSample += c->vChrDrop;
1387 /* drop every other pixel for chroma calculation unless user
1388 * wants full chroma */
1389 if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) &&
1390 srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 &&
1391 srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 &&
1392 srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE &&
1393 srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE &&
1394 srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE &&
1395 srcFormat != AV_PIX_FMT_GBRAP10BE && srcFormat != AV_PIX_FMT_GBRAP10LE &&
1396 srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE &&
1397 srcFormat != AV_PIX_FMT_GBRAP12BE && srcFormat != AV_PIX_FMT_GBRAP12LE &&
1398 srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE &&
1399 srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE &&
1400 srcFormat != AV_PIX_FMT_GBRAP16BE && srcFormat != AV_PIX_FMT_GBRAP16LE &&
1401 ((dstW >> c->chrDstHSubSample) <= (srcW >> 1) ||
1402 (flags & SWS_FAST_BILINEAR)))
1403 c->chrSrcHSubSample = 1;
1405 // Note the AV_CEIL_RSHIFT is so that we always round toward +inf.
1406 c->chrSrcW = AV_CEIL_RSHIFT(srcW, c->chrSrcHSubSample);
1407 c->chrSrcH = AV_CEIL_RSHIFT(srcH, c->chrSrcVSubSample);
1408 c->chrDstW = AV_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
1409 c->chrDstH = AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
1411 FF_ALLOCZ_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
1413 c->srcBpc = desc_src->comp[0].depth;
1416 c->dstBpc = desc_dst->comp[0].depth;
1419 if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8)
1421 if (c->dstBpc == 16)
1424 if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
1425 c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 &&
1426 c->chrDstW >= c->chrSrcW &&
1428 if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (srcW & 15) == 0
1430 && (flags & SWS_FAST_BILINEAR)) {
1431 if (flags & SWS_PRINT_INFO)
1432 av_log(c, AV_LOG_INFO,
1433 "output width is not a multiple of 32 -> no MMXEXT scaler\n");
1435 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat))
1436 c->canMMXEXTBeUsed = 0;
1438 c->canMMXEXTBeUsed = 0;
1440 c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW;
1441 c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH;
1443 /* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src
1444 * to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do
1446 * n-2 is the last chrominance sample available.
1447 * This is not perfect, but no one should notice the difference, the more
1448 * correct variant would be like the vertical one, but that would require
1449 * some special code for the first and last pixel */
1450 if (flags & SWS_FAST_BILINEAR) {
1451 if (c->canMMXEXTBeUsed) {
1455 // we don't use the x86 asm scaler if MMX is available
1456 else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) {
1457 c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
1458 c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20;
1462 // hardcoded for now
1463 c->gamma_value = 2.2;
1464 tmpFmt = AV_PIX_FMT_RGBA64LE;
1467 if (!unscaled && c->gamma_flag && (srcFormat != tmpFmt || dstFormat != tmpFmt)) {
1469 c->cascaded_context[0] = NULL;
1471 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1472 srcW, srcH, tmpFmt, 64);
1476 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1478 flags, NULL, NULL, c->param);
1479 if (!c->cascaded_context[0]) {
1483 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFmt,
1485 flags, srcFilter, dstFilter, c->param);
1487 if (!c->cascaded_context[1])
1490 c2 = c->cascaded_context[1];
1491 c2->is_internal_gamma = 1;
1492 c2->gamma = alloc_gamma_tbl( c->gamma_value);
1493 c2->inv_gamma = alloc_gamma_tbl(1.f/c->gamma_value);
1494 if (!c2->gamma || !c2->inv_gamma)
1495 return AVERROR(ENOMEM);
1497 // is_internal_flag is set after creating the context
1498 // to properly create the gamma convert FilterDescriptor
1499 // we have to re-initialize it
1500 ff_free_filters(c2);
1501 if (ff_init_filters(c2) < 0) {
1502 sws_freeContext(c2);
1506 c->cascaded_context[2] = NULL;
1507 if (dstFormat != tmpFmt) {
1508 ret = av_image_alloc(c->cascaded1_tmp, c->cascaded1_tmpStride,
1509 dstW, dstH, tmpFmt, 64);
1513 c->cascaded_context[2] = sws_getContext(dstW, dstH, tmpFmt,
1514 dstW, dstH, dstFormat,
1515 flags, NULL, NULL, c->param);
1516 if (!c->cascaded_context[2])
1522 if (isBayer(srcFormat)) {
1524 (dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
1525 enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
1527 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1528 srcW, srcH, tmpFormat, 64);
1532 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1533 srcW, srcH, tmpFormat,
1534 flags, srcFilter, NULL, c->param);
1535 if (!c->cascaded_context[0])
1538 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
1539 dstW, dstH, dstFormat,
1540 flags, NULL, dstFilter, c->param);
1541 if (!c->cascaded_context[1])
1547 if (unscaled && c->srcBpc == 8 && dstFormat == AV_PIX_FMT_GRAYF32){
1548 for (i = 0; i < 256; ++i){
1549 c->uint2float_lut[i] = (float)i * float_mult;
1553 // float will be converted to uint16_t
1554 if ((srcFormat == AV_PIX_FMT_GRAYF32BE || srcFormat == AV_PIX_FMT_GRAYF32LE) &&
1555 (!unscaled || unscaled && dstFormat != srcFormat && (srcFormat != AV_PIX_FMT_GRAYF32 ||
1556 dstFormat != AV_PIX_FMT_GRAY8))){
1560 if (CONFIG_SWSCALE_ALPHA && isALPHA(srcFormat) && !isALPHA(dstFormat)) {
1561 enum AVPixelFormat tmpFormat = alphaless_fmt(srcFormat);
1563 if (tmpFormat != AV_PIX_FMT_NONE && c->alphablend != SWS_ALPHA_BLEND_NONE)
1565 dstFormat != tmpFormat ||
1566 usesHFilter || usesVFilter ||
1567 c->srcRange != c->dstRange
1569 c->cascaded_mainindex = 1;
1570 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1571 srcW, srcH, tmpFormat, 64);
1575 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, srcFormat,
1576 srcW, srcH, tmpFormat,
1578 if (!c->cascaded_context[0])
1580 c->cascaded_context[0]->alphablend = c->alphablend;
1581 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
1585 c->cascaded_context[1] = sws_alloc_set_opts(srcW, srcH, tmpFormat,
1586 dstW, dstH, dstFormat,
1588 if (!c->cascaded_context[1])
1591 c->cascaded_context[1]->srcRange = c->srcRange;
1592 c->cascaded_context[1]->dstRange = c->dstRange;
1593 ret = sws_init_context(c->cascaded_context[1], srcFilter , dstFilter);
1601 #if HAVE_MMAP && HAVE_MPROTECT && defined(MAP_ANONYMOUS)
1607 /* precalculate horizontal scaler filter coefficients */
1609 #if HAVE_MMXEXT_INLINE
1610 // can't downscale !!!
1611 if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) {
1612 c->lumMmxextFilterCodeSize = ff_init_hscaler_mmxext(dstW, c->lumXInc, NULL,
1614 c->chrMmxextFilterCodeSize = ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc,
1615 NULL, NULL, NULL, 4);
1618 c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize,
1619 PROT_READ | PROT_WRITE,
1620 MAP_PRIVATE | MAP_ANONYMOUS,
1622 c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize,
1623 PROT_READ | PROT_WRITE,
1624 MAP_PRIVATE | MAP_ANONYMOUS,
1626 #elif HAVE_VIRTUALALLOC
1627 c->lumMmxextFilterCode = VirtualAlloc(NULL,
1628 c->lumMmxextFilterCodeSize,
1630 PAGE_EXECUTE_READWRITE);
1631 c->chrMmxextFilterCode = VirtualAlloc(NULL,
1632 c->chrMmxextFilterCodeSize,
1634 PAGE_EXECUTE_READWRITE);
1636 c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize);
1637 c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize);
1640 #ifdef MAP_ANONYMOUS
1641 if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED)
1643 if (!c->lumMmxextFilterCode || !c->chrMmxextFilterCode)
1646 av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
1647 return AVERROR(ENOMEM);
1650 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail);
1651 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail);
1652 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail);
1653 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail);
1655 ff_init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode,
1656 c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
1657 ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode,
1658 c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
1661 if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1
1662 || mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) {
1663 av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
1668 #endif /* HAVE_MMXEXT_INLINE */
1670 const int filterAlign = X86_MMX(cpu_flags) ? 4 :
1671 PPC_ALTIVEC(cpu_flags) ? 8 :
1672 have_neon(cpu_flags) ? 8 : 1;
1674 if ((ret = initFilter(&c->hLumFilter, &c->hLumFilterPos,
1675 &c->hLumFilterSize, c->lumXInc,
1676 srcW, dstW, filterAlign, 1 << 14,
1677 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1678 cpu_flags, srcFilter->lumH, dstFilter->lumH,
1680 get_local_pos(c, 0, 0, 0),
1681 get_local_pos(c, 0, 0, 0))) < 0)
1683 if ((ret = initFilter(&c->hChrFilter, &c->hChrFilterPos,
1684 &c->hChrFilterSize, c->chrXInc,
1685 c->chrSrcW, c->chrDstW, filterAlign, 1 << 14,
1686 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1687 cpu_flags, srcFilter->chrH, dstFilter->chrH,
1689 get_local_pos(c, c->chrSrcHSubSample, c->src_h_chr_pos, 0),
1690 get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0))) < 0)
1693 } // initialize horizontal stuff
1695 /* precalculate vertical scaler filter coefficients */
1697 const int filterAlign = X86_MMX(cpu_flags) ? 2 :
1698 PPC_ALTIVEC(cpu_flags) ? 8 :
1699 have_neon(cpu_flags) ? 2 : 1;
1701 if ((ret = initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize,
1702 c->lumYInc, srcH, dstH, filterAlign, (1 << 12),
1703 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1704 cpu_flags, srcFilter->lumV, dstFilter->lumV,
1706 get_local_pos(c, 0, 0, 1),
1707 get_local_pos(c, 0, 0, 1))) < 0)
1709 if ((ret = initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize,
1710 c->chrYInc, c->chrSrcH, c->chrDstH,
1711 filterAlign, (1 << 12),
1712 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1713 cpu_flags, srcFilter->chrV, dstFilter->chrV,
1715 get_local_pos(c, c->chrSrcVSubSample, c->src_v_chr_pos, 1),
1716 get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1))) < 0)
1721 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail);
1722 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail);
1724 for (i = 0; i < c->vLumFilterSize * c->dstH; i++) {
1726 short *p = (short *)&c->vYCoeffsBank[i];
1727 for (j = 0; j < 8; j++)
1728 p[j] = c->vLumFilter[i];
1731 for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) {
1733 short *p = (short *)&c->vCCoeffsBank[i];
1734 for (j = 0; j < 8; j++)
1735 p[j] = c->vChrFilter[i];
1740 for (i = 0; i < 4; i++)
1741 FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
1743 c->needAlpha = (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) ? 1 : 0;
1745 // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
1746 c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
1747 c->uv_offx2 = dst_stride + 16;
1749 av_assert0(c->chrDstH <= dstH);
1751 if (flags & SWS_PRINT_INFO) {
1752 const char *scaler = NULL, *cpucaps;
1754 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
1755 if (flags & scale_algorithms[i].flag) {
1756 scaler = scale_algorithms[i].description;
1761 scaler = "ehh flags invalid?!";
1762 av_log(c, AV_LOG_INFO, "%s scaler, from %s to %s%s ",
1764 av_get_pix_fmt_name(srcFormat),
1766 dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 ||
1767 dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE ||
1768 dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ?
1773 av_get_pix_fmt_name(dstFormat));
1775 if (INLINE_MMXEXT(cpu_flags))
1777 else if (INLINE_AMD3DNOW(cpu_flags))
1779 else if (INLINE_MMX(cpu_flags))
1781 else if (PPC_ALTIVEC(cpu_flags))
1782 cpucaps = "AltiVec";
1786 av_log(c, AV_LOG_INFO, "using %s\n", cpucaps);
1788 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1789 av_log(c, AV_LOG_DEBUG,
1790 "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1791 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1792 av_log(c, AV_LOG_DEBUG,
1793 "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1794 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH,
1795 c->chrXInc, c->chrYInc);
1798 /* alpha blend special case, note this has been split via cascaded contexts if its scaled */
1799 if (unscaled && !usesHFilter && !usesVFilter &&
1800 c->alphablend != SWS_ALPHA_BLEND_NONE &&
1801 isALPHA(srcFormat) &&
1802 (c->srcRange == c->dstRange || isAnyRGB(dstFormat)) &&
1803 alphaless_fmt(srcFormat) == dstFormat
1805 c->swscale = ff_sws_alphablendaway;
1807 if (flags & SWS_PRINT_INFO)
1808 av_log(c, AV_LOG_INFO,
1809 "using alpha blendaway %s -> %s special converter\n",
1810 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1814 /* unscaled special cases */
1815 if (unscaled && !usesHFilter && !usesVFilter &&
1816 (c->srcRange == c->dstRange || isAnyRGB(dstFormat) ||
1817 isFloat(srcFormat) || isFloat(dstFormat))){
1818 ff_get_unscaled_swscale(c);
1821 if (flags & SWS_PRINT_INFO)
1822 av_log(c, AV_LOG_INFO,
1823 "using unscaled %s -> %s special converter\n",
1824 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1829 c->swscale = ff_getSwsFunc(c);
1830 return ff_init_filters(c);
1831 fail: // FIXME replace things by appropriate error codes
1832 if (ret == RETCODE_USE_CASCADE) {
1833 int tmpW = sqrt(srcW * (int64_t)dstW);
1834 int tmpH = sqrt(srcH * (int64_t)dstH);
1835 enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P;
1837 if (isALPHA(srcFormat))
1838 tmpFormat = AV_PIX_FMT_YUVA420P;
1840 if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
1841 return AVERROR(EINVAL);
1843 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1844 tmpW, tmpH, tmpFormat, 64);
1848 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1849 tmpW, tmpH, tmpFormat,
1850 flags, srcFilter, NULL, c->param);
1851 if (!c->cascaded_context[0])
1854 c->cascaded_context[1] = sws_getContext(tmpW, tmpH, tmpFormat,
1855 dstW, dstH, dstFormat,
1856 flags, NULL, dstFilter, c->param);
1857 if (!c->cascaded_context[1])
1864 SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
1865 int dstW, int dstH, enum AVPixelFormat dstFormat,
1866 int flags, const double *param)
1870 if (!(c = sws_alloc_context()))
1878 c->srcFormat = srcFormat;
1879 c->dstFormat = dstFormat;
1882 c->param[0] = param[0];
1883 c->param[1] = param[1];
1889 SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
1890 int dstW, int dstH, enum AVPixelFormat dstFormat,
1891 int flags, SwsFilter *srcFilter,
1892 SwsFilter *dstFilter, const double *param)
1896 c = sws_alloc_set_opts(srcW, srcH, srcFormat,
1897 dstW, dstH, dstFormat,
1902 if (sws_init_context(c, srcFilter, dstFilter) < 0) {
1910 static int isnan_vec(SwsVector *a)
1913 for (i=0; i<a->length; i++)
1914 if (isnan(a->coeff[i]))
1919 static void makenan_vec(SwsVector *a)
1922 for (i=0; i<a->length; i++)
1926 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1927 float lumaSharpen, float chromaSharpen,
1928 float chromaHShift, float chromaVShift,
1931 SwsFilter *filter = av_malloc(sizeof(SwsFilter));
1935 if (lumaGBlur != 0.0) {
1936 filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0);
1937 filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0);
1939 filter->lumH = sws_getIdentityVec();
1940 filter->lumV = sws_getIdentityVec();
1943 if (chromaGBlur != 0.0) {
1944 filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0);
1945 filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0);
1947 filter->chrH = sws_getIdentityVec();
1948 filter->chrV = sws_getIdentityVec();
1951 if (!filter->lumH || !filter->lumV || !filter->chrH || !filter->chrV)
1954 if (chromaSharpen != 0.0) {
1955 SwsVector *id = sws_getIdentityVec();
1958 sws_scaleVec(filter->chrH, -chromaSharpen);
1959 sws_scaleVec(filter->chrV, -chromaSharpen);
1960 sws_addVec(filter->chrH, id);
1961 sws_addVec(filter->chrV, id);
1965 if (lumaSharpen != 0.0) {
1966 SwsVector *id = sws_getIdentityVec();
1969 sws_scaleVec(filter->lumH, -lumaSharpen);
1970 sws_scaleVec(filter->lumV, -lumaSharpen);
1971 sws_addVec(filter->lumH, id);
1972 sws_addVec(filter->lumV, id);
1976 if (chromaHShift != 0.0)
1977 sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5));
1979 if (chromaVShift != 0.0)
1980 sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5));
1982 sws_normalizeVec(filter->chrH, 1.0);
1983 sws_normalizeVec(filter->chrV, 1.0);
1984 sws_normalizeVec(filter->lumH, 1.0);
1985 sws_normalizeVec(filter->lumV, 1.0);
1987 if (isnan_vec(filter->chrH) ||
1988 isnan_vec(filter->chrV) ||
1989 isnan_vec(filter->lumH) ||
1990 isnan_vec(filter->lumV))
1994 sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1996 sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
2001 sws_freeVec(filter->lumH);
2002 sws_freeVec(filter->lumV);
2003 sws_freeVec(filter->chrH);
2004 sws_freeVec(filter->chrV);
2009 SwsVector *sws_allocVec(int length)
2013 if(length <= 0 || length > INT_MAX/ sizeof(double))
2016 vec = av_malloc(sizeof(SwsVector));
2019 vec->length = length;
2020 vec->coeff = av_malloc(sizeof(double) * length);
2026 SwsVector *sws_getGaussianVec(double variance, double quality)
2028 const int length = (int)(variance * quality + 0.5) | 1;
2030 double middle = (length - 1) * 0.5;
2033 if(variance < 0 || quality < 0)
2036 vec = sws_allocVec(length);
2041 for (i = 0; i < length; i++) {
2042 double dist = i - middle;
2043 vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
2044 sqrt(2 * variance * M_PI);
2047 sws_normalizeVec(vec, 1.0);
2053 * Allocate and return a vector with length coefficients, all
2054 * with the same value c.
2056 #if !FF_API_SWS_VECTOR
2059 SwsVector *sws_getConstVec(double c, int length)
2062 SwsVector *vec = sws_allocVec(length);
2067 for (i = 0; i < length; i++)
2074 * Allocate and return a vector with just one coefficient, with
2077 #if !FF_API_SWS_VECTOR
2080 SwsVector *sws_getIdentityVec(void)
2082 return sws_getConstVec(1.0, 1);
2085 static double sws_dcVec(SwsVector *a)
2090 for (i = 0; i < a->length; i++)
2096 void sws_scaleVec(SwsVector *a, double scalar)
2100 for (i = 0; i < a->length; i++)
2101 a->coeff[i] *= scalar;
2104 void sws_normalizeVec(SwsVector *a, double height)
2106 sws_scaleVec(a, height / sws_dcVec(a));
2109 #if FF_API_SWS_VECTOR
2110 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
2112 int length = a->length + b->length - 1;
2114 SwsVector *vec = sws_getConstVec(0.0, length);
2119 for (i = 0; i < a->length; i++) {
2120 for (j = 0; j < b->length; j++) {
2121 vec->coeff[i + j] += a->coeff[i] * b->coeff[j];
2129 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
2131 int length = FFMAX(a->length, b->length);
2133 SwsVector *vec = sws_getConstVec(0.0, length);
2138 for (i = 0; i < a->length; i++)
2139 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2140 for (i = 0; i < b->length; i++)
2141 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i];
2146 #if FF_API_SWS_VECTOR
2147 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
2149 int length = FFMAX(a->length, b->length);
2151 SwsVector *vec = sws_getConstVec(0.0, length);
2156 for (i = 0; i < a->length; i++)
2157 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2158 for (i = 0; i < b->length; i++)
2159 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i];
2165 /* shift left / or right if "shift" is negative */
2166 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
2168 int length = a->length + FFABS(shift) * 2;
2170 SwsVector *vec = sws_getConstVec(0.0, length);
2175 for (i = 0; i < a->length; i++) {
2176 vec->coeff[i + (length - 1) / 2 -
2177 (a->length - 1) / 2 - shift] = a->coeff[i];
2183 #if !FF_API_SWS_VECTOR
2186 void sws_shiftVec(SwsVector *a, int shift)
2188 SwsVector *shifted = sws_getShiftedVec(a, shift);
2194 a->coeff = shifted->coeff;
2195 a->length = shifted->length;
2199 #if !FF_API_SWS_VECTOR
2202 void sws_addVec(SwsVector *a, SwsVector *b)
2204 SwsVector *sum = sws_sumVec(a, b);
2210 a->coeff = sum->coeff;
2211 a->length = sum->length;
2215 #if FF_API_SWS_VECTOR
2216 void sws_subVec(SwsVector *a, SwsVector *b)
2218 SwsVector *diff = sws_diffVec(a, b);
2224 a->coeff = diff->coeff;
2225 a->length = diff->length;
2229 void sws_convVec(SwsVector *a, SwsVector *b)
2231 SwsVector *conv = sws_getConvVec(a, b);
2237 a->coeff = conv->coeff;
2238 a->length = conv->length;
2242 SwsVector *sws_cloneVec(SwsVector *a)
2244 SwsVector *vec = sws_allocVec(a->length);
2249 memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff));
2256 * Print with av_log() a textual representation of the vector a
2257 * if log_level <= av_log_level.
2259 #if !FF_API_SWS_VECTOR
2262 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
2269 for (i = 0; i < a->length; i++)
2270 if (a->coeff[i] > max)
2273 for (i = 0; i < a->length; i++)
2274 if (a->coeff[i] < min)
2279 for (i = 0; i < a->length; i++) {
2280 int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5);
2281 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
2283 av_log(log_ctx, log_level, " ");
2284 av_log(log_ctx, log_level, "|\n");
2288 void sws_freeVec(SwsVector *a)
2292 av_freep(&a->coeff);
2297 void sws_freeFilter(SwsFilter *filter)
2302 sws_freeVec(filter->lumH);
2303 sws_freeVec(filter->lumV);
2304 sws_freeVec(filter->chrH);
2305 sws_freeVec(filter->chrV);
2309 void sws_freeContext(SwsContext *c)
2315 for (i = 0; i < 4; i++)
2316 av_freep(&c->dither_error[i]);
2318 av_freep(&c->vLumFilter);
2319 av_freep(&c->vChrFilter);
2320 av_freep(&c->hLumFilter);
2321 av_freep(&c->hChrFilter);
2323 av_freep(&c->vYCoeffsBank);
2324 av_freep(&c->vCCoeffsBank);
2327 av_freep(&c->vLumFilterPos);
2328 av_freep(&c->vChrFilterPos);
2329 av_freep(&c->hLumFilterPos);
2330 av_freep(&c->hChrFilterPos);
2334 if (c->lumMmxextFilterCode)
2335 munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize);
2336 if (c->chrMmxextFilterCode)
2337 munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize);
2338 #elif HAVE_VIRTUALALLOC
2339 if (c->lumMmxextFilterCode)
2340 VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE);
2341 if (c->chrMmxextFilterCode)
2342 VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE);
2344 av_free(c->lumMmxextFilterCode);
2345 av_free(c->chrMmxextFilterCode);
2347 c->lumMmxextFilterCode = NULL;
2348 c->chrMmxextFilterCode = NULL;
2349 #endif /* HAVE_MMX_INLINE */
2351 av_freep(&c->yuvTable);
2352 av_freep(&c->formatConvBuffer);
2354 sws_freeContext(c->cascaded_context[0]);
2355 sws_freeContext(c->cascaded_context[1]);
2356 sws_freeContext(c->cascaded_context[2]);
2357 memset(c->cascaded_context, 0, sizeof(c->cascaded_context));
2358 av_freep(&c->cascaded_tmp[0]);
2359 av_freep(&c->cascaded1_tmp[0]);
2361 av_freep(&c->gamma);
2362 av_freep(&c->inv_gamma);
2369 struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
2370 int srcH, enum AVPixelFormat srcFormat,
2372 enum AVPixelFormat dstFormat, int flags,
2373 SwsFilter *srcFilter,
2374 SwsFilter *dstFilter,
2375 const double *param)
2377 static const double default_param[2] = { SWS_PARAM_DEFAULT,
2378 SWS_PARAM_DEFAULT };
2379 int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513,
2380 src_v_chr_pos = -513, dst_v_chr_pos = -513;
2383 param = default_param;
2386 (context->srcW != srcW ||
2387 context->srcH != srcH ||
2388 context->srcFormat != srcFormat ||
2389 context->dstW != dstW ||
2390 context->dstH != dstH ||
2391 context->dstFormat != dstFormat ||
2392 context->flags != flags ||
2393 context->param[0] != param[0] ||
2394 context->param[1] != param[1])) {
2396 av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos);
2397 av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos);
2398 av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos);
2399 av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos);
2400 sws_freeContext(context);
2405 if (!(context = sws_alloc_context()))
2407 context->srcW = srcW;
2408 context->srcH = srcH;
2409 context->srcFormat = srcFormat;
2410 context->dstW = dstW;
2411 context->dstH = dstH;
2412 context->dstFormat = dstFormat;
2413 context->flags = flags;
2414 context->param[0] = param[0];
2415 context->param[1] = param[1];
2417 av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0);
2418 av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0);
2419 av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0);
2420 av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0);
2422 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
2423 sws_freeContext(context);