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[] = {
99 [AV_PIX_FMT_YUV420P] = { 1, 1 },
100 [AV_PIX_FMT_YUYV422] = { 1, 1 },
101 [AV_PIX_FMT_RGB24] = { 1, 1 },
102 [AV_PIX_FMT_BGR24] = { 1, 1 },
103 [AV_PIX_FMT_YUV422P] = { 1, 1 },
104 [AV_PIX_FMT_YUV444P] = { 1, 1 },
105 [AV_PIX_FMT_YUV410P] = { 1, 1 },
106 [AV_PIX_FMT_YUV411P] = { 1, 1 },
107 [AV_PIX_FMT_GRAY8] = { 1, 1 },
108 [AV_PIX_FMT_MONOWHITE] = { 1, 1 },
109 [AV_PIX_FMT_MONOBLACK] = { 1, 1 },
110 [AV_PIX_FMT_PAL8] = { 1, 0 },
111 [AV_PIX_FMT_YUVJ420P] = { 1, 1 },
112 [AV_PIX_FMT_YUVJ411P] = { 1, 1 },
113 [AV_PIX_FMT_YUVJ422P] = { 1, 1 },
114 [AV_PIX_FMT_YUVJ444P] = { 1, 1 },
115 [AV_PIX_FMT_YVYU422] = { 1, 1 },
116 [AV_PIX_FMT_UYVY422] = { 1, 1 },
117 [AV_PIX_FMT_UYYVYY411] = { 0, 0 },
118 [AV_PIX_FMT_BGR8] = { 1, 1 },
119 [AV_PIX_FMT_BGR4] = { 0, 1 },
120 [AV_PIX_FMT_BGR4_BYTE] = { 1, 1 },
121 [AV_PIX_FMT_RGB8] = { 1, 1 },
122 [AV_PIX_FMT_RGB4] = { 0, 1 },
123 [AV_PIX_FMT_RGB4_BYTE] = { 1, 1 },
124 [AV_PIX_FMT_NV12] = { 1, 1 },
125 [AV_PIX_FMT_NV21] = { 1, 1 },
126 [AV_PIX_FMT_ARGB] = { 1, 1 },
127 [AV_PIX_FMT_RGBA] = { 1, 1 },
128 [AV_PIX_FMT_ABGR] = { 1, 1 },
129 [AV_PIX_FMT_BGRA] = { 1, 1 },
130 [AV_PIX_FMT_0RGB] = { 1, 1 },
131 [AV_PIX_FMT_RGB0] = { 1, 1 },
132 [AV_PIX_FMT_0BGR] = { 1, 1 },
133 [AV_PIX_FMT_BGR0] = { 1, 1 },
134 [AV_PIX_FMT_GRAY9BE] = { 1, 1 },
135 [AV_PIX_FMT_GRAY9LE] = { 1, 1 },
136 [AV_PIX_FMT_GRAY10BE] = { 1, 1 },
137 [AV_PIX_FMT_GRAY10LE] = { 1, 1 },
138 [AV_PIX_FMT_GRAY12BE] = { 1, 1 },
139 [AV_PIX_FMT_GRAY12LE] = { 1, 1 },
140 [AV_PIX_FMT_GRAY14BE] = { 1, 1 },
141 [AV_PIX_FMT_GRAY14LE] = { 1, 1 },
142 [AV_PIX_FMT_GRAY16BE] = { 1, 1 },
143 [AV_PIX_FMT_GRAY16LE] = { 1, 1 },
144 [AV_PIX_FMT_YUV440P] = { 1, 1 },
145 [AV_PIX_FMT_YUVJ440P] = { 1, 1 },
146 [AV_PIX_FMT_YUV440P10LE] = { 1, 1 },
147 [AV_PIX_FMT_YUV440P10BE] = { 1, 1 },
148 [AV_PIX_FMT_YUV440P12LE] = { 1, 1 },
149 [AV_PIX_FMT_YUV440P12BE] = { 1, 1 },
150 [AV_PIX_FMT_YUVA420P] = { 1, 1 },
151 [AV_PIX_FMT_YUVA422P] = { 1, 1 },
152 [AV_PIX_FMT_YUVA444P] = { 1, 1 },
153 [AV_PIX_FMT_YUVA420P9BE] = { 1, 1 },
154 [AV_PIX_FMT_YUVA420P9LE] = { 1, 1 },
155 [AV_PIX_FMT_YUVA422P9BE] = { 1, 1 },
156 [AV_PIX_FMT_YUVA422P9LE] = { 1, 1 },
157 [AV_PIX_FMT_YUVA444P9BE] = { 1, 1 },
158 [AV_PIX_FMT_YUVA444P9LE] = { 1, 1 },
159 [AV_PIX_FMT_YUVA420P10BE]= { 1, 1 },
160 [AV_PIX_FMT_YUVA420P10LE]= { 1, 1 },
161 [AV_PIX_FMT_YUVA422P10BE]= { 1, 1 },
162 [AV_PIX_FMT_YUVA422P10LE]= { 1, 1 },
163 [AV_PIX_FMT_YUVA444P10BE]= { 1, 1 },
164 [AV_PIX_FMT_YUVA444P10LE]= { 1, 1 },
165 [AV_PIX_FMT_YUVA420P16BE]= { 1, 1 },
166 [AV_PIX_FMT_YUVA420P16LE]= { 1, 1 },
167 [AV_PIX_FMT_YUVA422P16BE]= { 1, 1 },
168 [AV_PIX_FMT_YUVA422P16LE]= { 1, 1 },
169 [AV_PIX_FMT_YUVA444P16BE]= { 1, 1 },
170 [AV_PIX_FMT_YUVA444P16LE]= { 1, 1 },
171 [AV_PIX_FMT_RGB48BE] = { 1, 1 },
172 [AV_PIX_FMT_RGB48LE] = { 1, 1 },
173 [AV_PIX_FMT_RGBA64BE] = { 1, 1, 1 },
174 [AV_PIX_FMT_RGBA64LE] = { 1, 1, 1 },
175 [AV_PIX_FMT_RGB565BE] = { 1, 1 },
176 [AV_PIX_FMT_RGB565LE] = { 1, 1 },
177 [AV_PIX_FMT_RGB555BE] = { 1, 1 },
178 [AV_PIX_FMT_RGB555LE] = { 1, 1 },
179 [AV_PIX_FMT_BGR565BE] = { 1, 1 },
180 [AV_PIX_FMT_BGR565LE] = { 1, 1 },
181 [AV_PIX_FMT_BGR555BE] = { 1, 1 },
182 [AV_PIX_FMT_BGR555LE] = { 1, 1 },
183 [AV_PIX_FMT_YUV420P16LE] = { 1, 1 },
184 [AV_PIX_FMT_YUV420P16BE] = { 1, 1 },
185 [AV_PIX_FMT_YUV422P16LE] = { 1, 1 },
186 [AV_PIX_FMT_YUV422P16BE] = { 1, 1 },
187 [AV_PIX_FMT_YUV444P16LE] = { 1, 1 },
188 [AV_PIX_FMT_YUV444P16BE] = { 1, 1 },
189 [AV_PIX_FMT_RGB444LE] = { 1, 1 },
190 [AV_PIX_FMT_RGB444BE] = { 1, 1 },
191 [AV_PIX_FMT_BGR444LE] = { 1, 1 },
192 [AV_PIX_FMT_BGR444BE] = { 1, 1 },
193 [AV_PIX_FMT_YA8] = { 1, 1 },
194 [AV_PIX_FMT_YA16BE] = { 1, 1 },
195 [AV_PIX_FMT_YA16LE] = { 1, 1 },
196 [AV_PIX_FMT_BGR48BE] = { 1, 1 },
197 [AV_PIX_FMT_BGR48LE] = { 1, 1 },
198 [AV_PIX_FMT_BGRA64BE] = { 1, 1, 1 },
199 [AV_PIX_FMT_BGRA64LE] = { 1, 1, 1 },
200 [AV_PIX_FMT_YUV420P9BE] = { 1, 1 },
201 [AV_PIX_FMT_YUV420P9LE] = { 1, 1 },
202 [AV_PIX_FMT_YUV420P10BE] = { 1, 1 },
203 [AV_PIX_FMT_YUV420P10LE] = { 1, 1 },
204 [AV_PIX_FMT_YUV420P12BE] = { 1, 1 },
205 [AV_PIX_FMT_YUV420P12LE] = { 1, 1 },
206 [AV_PIX_FMT_YUV420P14BE] = { 1, 1 },
207 [AV_PIX_FMT_YUV420P14LE] = { 1, 1 },
208 [AV_PIX_FMT_YUV422P9BE] = { 1, 1 },
209 [AV_PIX_FMT_YUV422P9LE] = { 1, 1 },
210 [AV_PIX_FMT_YUV422P10BE] = { 1, 1 },
211 [AV_PIX_FMT_YUV422P10LE] = { 1, 1 },
212 [AV_PIX_FMT_YUV422P12BE] = { 1, 1 },
213 [AV_PIX_FMT_YUV422P12LE] = { 1, 1 },
214 [AV_PIX_FMT_YUV422P14BE] = { 1, 1 },
215 [AV_PIX_FMT_YUV422P14LE] = { 1, 1 },
216 [AV_PIX_FMT_YUV444P9BE] = { 1, 1 },
217 [AV_PIX_FMT_YUV444P9LE] = { 1, 1 },
218 [AV_PIX_FMT_YUV444P10BE] = { 1, 1 },
219 [AV_PIX_FMT_YUV444P10LE] = { 1, 1 },
220 [AV_PIX_FMT_YUV444P12BE] = { 1, 1 },
221 [AV_PIX_FMT_YUV444P12LE] = { 1, 1 },
222 [AV_PIX_FMT_YUV444P14BE] = { 1, 1 },
223 [AV_PIX_FMT_YUV444P14LE] = { 1, 1 },
224 [AV_PIX_FMT_GBRP] = { 1, 1 },
225 [AV_PIX_FMT_GBRP9LE] = { 1, 1 },
226 [AV_PIX_FMT_GBRP9BE] = { 1, 1 },
227 [AV_PIX_FMT_GBRP10LE] = { 1, 1 },
228 [AV_PIX_FMT_GBRP10BE] = { 1, 1 },
229 [AV_PIX_FMT_GBRAP10LE] = { 1, 1 },
230 [AV_PIX_FMT_GBRAP10BE] = { 1, 1 },
231 [AV_PIX_FMT_GBRP12LE] = { 1, 1 },
232 [AV_PIX_FMT_GBRP12BE] = { 1, 1 },
233 [AV_PIX_FMT_GBRAP12LE] = { 1, 1 },
234 [AV_PIX_FMT_GBRAP12BE] = { 1, 1 },
235 [AV_PIX_FMT_GBRP14LE] = { 1, 1 },
236 [AV_PIX_FMT_GBRP14BE] = { 1, 1 },
237 [AV_PIX_FMT_GBRP16LE] = { 1, 1 },
238 [AV_PIX_FMT_GBRP16BE] = { 1, 1 },
239 [AV_PIX_FMT_GBRAP] = { 1, 1 },
240 [AV_PIX_FMT_GBRAP16LE] = { 1, 1 },
241 [AV_PIX_FMT_GBRAP16BE] = { 1, 1 },
242 [AV_PIX_FMT_BAYER_BGGR8] = { 1, 0 },
243 [AV_PIX_FMT_BAYER_RGGB8] = { 1, 0 },
244 [AV_PIX_FMT_BAYER_GBRG8] = { 1, 0 },
245 [AV_PIX_FMT_BAYER_GRBG8] = { 1, 0 },
246 [AV_PIX_FMT_BAYER_BGGR16LE] = { 1, 0 },
247 [AV_PIX_FMT_BAYER_BGGR16BE] = { 1, 0 },
248 [AV_PIX_FMT_BAYER_RGGB16LE] = { 1, 0 },
249 [AV_PIX_FMT_BAYER_RGGB16BE] = { 1, 0 },
250 [AV_PIX_FMT_BAYER_GBRG16LE] = { 1, 0 },
251 [AV_PIX_FMT_BAYER_GBRG16BE] = { 1, 0 },
252 [AV_PIX_FMT_BAYER_GRBG16LE] = { 1, 0 },
253 [AV_PIX_FMT_BAYER_GRBG16BE] = { 1, 0 },
254 [AV_PIX_FMT_XYZ12BE] = { 1, 1, 1 },
255 [AV_PIX_FMT_XYZ12LE] = { 1, 1, 1 },
256 [AV_PIX_FMT_AYUV64LE] = { 1, 1},
257 [AV_PIX_FMT_P010LE] = { 1, 1 },
258 [AV_PIX_FMT_P010BE] = { 1, 1 },
259 [AV_PIX_FMT_P016LE] = { 1, 1 },
260 [AV_PIX_FMT_P016BE] = { 1, 1 },
261 [AV_PIX_FMT_GRAYF32LE] = { 1, 1 },
262 [AV_PIX_FMT_GRAYF32BE] = { 1, 1 },
263 [AV_PIX_FMT_YUVA422P12BE] = { 1, 1 },
264 [AV_PIX_FMT_YUVA422P12LE] = { 1, 1 },
265 [AV_PIX_FMT_YUVA444P12BE] = { 1, 1 },
266 [AV_PIX_FMT_YUVA444P12LE] = { 1, 1 },
267 [AV_PIX_FMT_NV24] = { 1, 1 },
268 [AV_PIX_FMT_NV42] = { 1, 1 },
269 [AV_PIX_FMT_Y210LE] = { 1, 0 },
272 int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
274 return (unsigned)pix_fmt < FF_ARRAY_ELEMS(format_entries) ?
275 format_entries[pix_fmt].is_supported_in : 0;
278 int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
280 return (unsigned)pix_fmt < FF_ARRAY_ELEMS(format_entries) ?
281 format_entries[pix_fmt].is_supported_out : 0;
284 int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
286 return (unsigned)pix_fmt < FF_ARRAY_ELEMS(format_entries) ?
287 format_entries[pix_fmt].is_supported_endianness : 0;
290 static double getSplineCoeff(double a, double b, double c, double d,
294 return ((d * dist + c) * dist + b) * dist + a;
296 return getSplineCoeff(0.0,
297 b + 2.0 * c + 3.0 * d,
299 -b - 3.0 * c - 6.0 * d,
303 static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
305 if (pos == -1 || pos <= -513) {
306 pos = (128 << chr_subsample) - 128;
308 pos += 128; // relative to ideal left edge
309 return pos >> chr_subsample;
313 int flag; ///< flag associated to the algorithm
314 const char *description; ///< human-readable description
315 int size_factor; ///< size factor used when initing the filters
318 static const ScaleAlgorithm scale_algorithms[] = {
319 { SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ },
320 { SWS_BICUBIC, "bicubic", 4 },
321 { SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 },
322 { SWS_BILINEAR, "bilinear", 2 },
323 { SWS_FAST_BILINEAR, "fast bilinear", -1 },
324 { SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ },
325 { SWS_LANCZOS, "Lanczos", -1 /* custom */ },
326 { SWS_POINT, "nearest neighbor / point", -1 },
327 { SWS_SINC, "sinc", 20 /* infinite ;) */ },
328 { SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ },
329 { SWS_X, "experimental", 8 },
332 static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
333 int *outFilterSize, int xInc, int srcW,
334 int dstW, int filterAlign, int one,
335 int flags, int cpu_flags,
336 SwsVector *srcFilter, SwsVector *dstFilter,
337 double param[2], int srcPos, int dstPos)
343 int64_t *filter = NULL;
344 int64_t *filter2 = NULL;
345 const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
348 emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
350 // NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
351 FF_ALLOC_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail);
353 if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
356 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter,
357 dstW, sizeof(*filter) * filterSize, fail);
359 for (i = 0; i < dstW; i++) {
360 filter[i * filterSize] = fone;
363 } else if (flags & SWS_POINT) { // lame looking point sampling mode
367 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
368 dstW, sizeof(*filter) * filterSize, fail);
370 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
371 for (i = 0; i < dstW; i++) {
372 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
374 (*filterPos)[i] = xx;
378 } else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) ||
379 (flags & SWS_FAST_BILINEAR)) { // bilinear upscale
383 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
384 dstW, sizeof(*filter) * filterSize, fail);
386 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
387 for (i = 0; i < dstW; i++) {
388 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
391 (*filterPos)[i] = xx;
392 // bilinear upscale / linear interpolate / area averaging
393 for (j = 0; j < filterSize; j++) {
394 int64_t coeff = fone - FFABS((int64_t)xx * (1 << 16) - xDstInSrc) * (fone >> 16);
397 filter[i * filterSize + j] = coeff;
406 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
407 if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) {
408 sizeFactor = scale_algorithms[i].size_factor;
412 if (flags & SWS_LANCZOS)
413 sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
414 av_assert0(sizeFactor > 0);
417 filterSize = 1 + sizeFactor; // upscale
419 filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
421 filterSize = FFMIN(filterSize, srcW - 2);
422 filterSize = FFMAX(filterSize, 1);
424 FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
425 dstW, sizeof(*filter) * filterSize, fail);
427 xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
428 for (i = 0; i < dstW; i++) {
429 int xx = (xDstInSrc - (filterSize - 2) * (1LL<<16)) / (1 << 17);
431 (*filterPos)[i] = xx;
432 for (j = 0; j < filterSize; j++) {
433 int64_t d = (FFABS(((int64_t)xx * (1 << 17)) - xDstInSrc)) << 13;
439 floatd = d * (1.0 / (1 << 30));
441 if (flags & SWS_BICUBIC) {
442 int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
443 int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
445 if (d >= 1LL << 31) {
448 int64_t dd = (d * d) >> 30;
449 int64_t ddd = (dd * d) >> 30;
452 coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
453 (-18 * (1 << 24) + 12 * B + 6 * C) * dd +
454 (6 * (1 << 24) - 2 * B) * (1 << 30);
456 coeff = (-B - 6 * C) * ddd +
457 (6 * B + 30 * C) * dd +
458 (-12 * B - 48 * C) * d +
459 (8 * B + 24 * C) * (1 << 30);
461 coeff /= (1LL<<54)/fone;
462 } else if (flags & SWS_X) {
463 double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
467 c = cos(floatd * M_PI);
474 coeff = (c * 0.5 + 0.5) * fone;
475 } else if (flags & SWS_AREA) {
476 int64_t d2 = d - (1 << 29);
477 if (d2 * xInc < -(1LL << (29 + 16)))
478 coeff = 1.0 * (1LL << (30 + 16));
479 else if (d2 * xInc < (1LL << (29 + 16)))
480 coeff = -d2 * xInc + (1LL << (29 + 16));
483 coeff *= fone >> (30 + 16);
484 } else if (flags & SWS_GAUSS) {
485 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
486 coeff = exp2(-p * floatd * floatd) * fone;
487 } else if (flags & SWS_SINC) {
488 coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone;
489 } else if (flags & SWS_LANCZOS) {
490 double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
491 coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) /
492 (floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
495 } else if (flags & SWS_BILINEAR) {
496 coeff = (1 << 30) - d;
500 } else if (flags & SWS_SPLINE) {
501 double p = -2.196152422706632;
502 coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone;
507 filter[i * filterSize + j] = coeff;
510 xDstInSrc += 2 * xInc;
514 /* apply src & dst Filter to filter -> filter2
517 av_assert0(filterSize > 0);
518 filter2Size = filterSize;
520 filter2Size += srcFilter->length - 1;
522 filter2Size += dstFilter->length - 1;
523 av_assert0(filter2Size > 0);
524 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter2, dstW, filter2Size * sizeof(*filter2), fail);
526 for (i = 0; i < dstW; i++) {
530 for (k = 0; k < srcFilter->length; k++) {
531 for (j = 0; j < filterSize; j++)
532 filter2[i * filter2Size + k + j] +=
533 srcFilter->coeff[k] * filter[i * filterSize + j];
536 for (j = 0; j < filterSize; j++)
537 filter2[i * filter2Size + j] = filter[i * filterSize + j];
541 (*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
545 /* try to reduce the filter-size (step1 find size and shift left) */
546 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
548 for (i = dstW - 1; i >= 0; i--) {
549 int min = filter2Size;
551 int64_t cutOff = 0.0;
553 /* get rid of near zero elements on the left by shifting left */
554 for (j = 0; j < filter2Size; j++) {
556 cutOff += FFABS(filter2[i * filter2Size]);
558 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
561 /* preserve monotonicity because the core can't handle the
562 * filter otherwise */
563 if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1])
566 // move filter coefficients left
567 for (k = 1; k < filter2Size; k++)
568 filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
569 filter2[i * filter2Size + k - 1] = 0;
574 /* count near zeros on the right */
575 for (j = filter2Size - 1; j > 0; j--) {
576 cutOff += FFABS(filter2[i * filter2Size + j]);
578 if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
583 if (min > minFilterSize)
587 if (PPC_ALTIVEC(cpu_flags)) {
588 // we can handle the special case 4, so we don't want to go the full 8
589 if (minFilterSize < 5)
592 /* We really don't want to waste our time doing useless computation, so
593 * fall back on the scalar C code for very small filters.
594 * Vectorizing is worth it only if you have a decent-sized vector. */
595 if (minFilterSize < 3)
599 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
600 // special case for unscaled vertical filtering
601 if (minFilterSize == 1 && filterAlign == 2)
605 av_assert0(minFilterSize > 0);
606 filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
607 av_assert0(filterSize > 0);
608 filter = av_malloc_array(dstW, filterSize * sizeof(*filter));
611 if (filterSize >= MAX_FILTER_SIZE * 16 /
612 ((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16)) {
613 ret = RETCODE_USE_CASCADE;
616 *outFilterSize = filterSize;
618 if (flags & SWS_PRINT_INFO)
619 av_log(NULL, AV_LOG_VERBOSE,
620 "SwScaler: reducing / aligning filtersize %d -> %d\n",
621 filter2Size, filterSize);
622 /* try to reduce the filter-size (step2 reduce it) */
623 for (i = 0; i < dstW; i++) {
626 for (j = 0; j < filterSize; j++) {
627 if (j >= filter2Size)
628 filter[i * filterSize + j] = 0;
630 filter[i * filterSize + j] = filter2[i * filter2Size + j];
631 if ((flags & SWS_BITEXACT) && j >= minFilterSize)
632 filter[i * filterSize + j] = 0;
636 // FIXME try to align filterPos if possible
639 for (i = 0; i < dstW; i++) {
641 if ((*filterPos)[i] < 0) {
642 // move filter coefficients left to compensate for filterPos
643 for (j = 1; j < filterSize; j++) {
644 int left = FFMAX(j + (*filterPos)[i], 0);
645 filter[i * filterSize + left] += filter[i * filterSize + j];
646 filter[i * filterSize + j] = 0;
651 if ((*filterPos)[i] + filterSize > srcW) {
652 int shift = (*filterPos)[i] + FFMIN(filterSize - srcW, 0);
655 for (j = filterSize - 1; j >= 0; j--) {
656 if ((*filterPos)[i] + j >= srcW) {
657 acc += filter[i * filterSize + j];
658 filter[i * filterSize + j] = 0;
661 for (j = filterSize - 1; j >= 0; j--) {
663 filter[i * filterSize + j] = 0;
665 filter[i * filterSize + j] = filter[i * filterSize + j - shift];
669 (*filterPos)[i]-= shift;
670 filter[i * filterSize + srcW - 1 - (*filterPos)[i]] += acc;
672 av_assert0((*filterPos)[i] >= 0);
673 av_assert0((*filterPos)[i] < srcW);
674 if ((*filterPos)[i] + filterSize > srcW) {
675 for (j = 0; j < filterSize; j++) {
676 av_assert0((*filterPos)[i] + j < srcW || !filter[i * filterSize + j]);
681 // Note the +1 is for the MMX scaler which reads over the end
682 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
683 FF_ALLOCZ_ARRAY_OR_GOTO(NULL, *outFilter,
684 (dstW + 3), *outFilterSize * sizeof(int16_t), fail);
686 /* normalize & store in outFilter */
687 for (i = 0; i < dstW; i++) {
692 for (j = 0; j < filterSize; j++) {
693 sum += filter[i * filterSize + j];
695 sum = (sum + one / 2) / one;
697 av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n");
700 for (j = 0; j < *outFilterSize; j++) {
701 int64_t v = filter[i * filterSize + j] + error;
702 int intV = ROUNDED_DIV(v, sum);
703 (*outFilter)[i * (*outFilterSize) + j] = intV;
704 error = v - intV * sum;
708 (*filterPos)[dstW + 0] =
709 (*filterPos)[dstW + 1] =
710 (*filterPos)[dstW + 2] = (*filterPos)[dstW - 1]; /* the MMX/SSE scaler will
711 * read over the end */
712 for (i = 0; i < *outFilterSize; i++) {
713 int k = (dstW - 1) * (*outFilterSize) + i;
714 (*outFilter)[k + 1 * (*outFilterSize)] =
715 (*outFilter)[k + 2 * (*outFilterSize)] =
716 (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
723 av_log(NULL, ret == RETCODE_USE_CASCADE ? AV_LOG_DEBUG : AV_LOG_ERROR, "sws: initFilter failed\n");
729 static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
731 int64_t W, V, Z, Cy, Cu, Cv;
732 int64_t vr = table[0];
733 int64_t ub = table[1];
734 int64_t ug = -table[2];
735 int64_t vg = -table[3];
738 uint8_t *p = (uint8_t*)c->input_rgb2yuv_table;
740 static const int8_t map[] = {
741 BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX,
742 RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX,
743 RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX,
744 BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX,
745 BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX,
746 RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX,
747 RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX,
748 BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX,
749 BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX,
750 RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX,
751 RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX,
752 BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX,
753 RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX,
754 BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX,
755 GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 ,
756 -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX,
757 RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX,
758 BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX,
759 GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 ,
760 -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX,
761 RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX,
762 BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX,
763 GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 ,
764 -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23
765 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24
766 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25
767 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26
768 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27
769 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28
770 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29
771 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30
772 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31
773 BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32
774 BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33
775 BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34
778 dstRange = 0; //FIXME range = 1 is handled elsewhere
788 W = ROUNDED_DIV(ONE*ONE*ug, ub);
789 V = ROUNDED_DIV(ONE*ONE*vg, vr);
792 Cy = ROUNDED_DIV(cy*Z, ONE);
793 Cu = ROUNDED_DIV(ub*Z, ONE);
794 Cv = ROUNDED_DIV(vr*Z, ONE);
796 c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy);
797 c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cy);
798 c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy);
800 c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu);
801 c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cu);
802 c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu);
804 c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv);
805 c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cv);
806 c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv);
808 if(/*!dstRange && */!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) {
809 c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
810 c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
811 c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
812 c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
813 c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
814 c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
815 c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
816 c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
817 c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
819 for(i=0; i<FF_ARRAY_ELEMS(map); i++)
820 AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0);
823 static void fill_xyztables(struct SwsContext *c)
826 double xyzgamma = XYZ_GAMMA;
827 double rgbgamma = 1.0 / RGB_GAMMA;
828 double xyzgammainv = 1.0 / XYZ_GAMMA;
829 double rgbgammainv = RGB_GAMMA;
830 static const int16_t xyz2rgb_matrix[3][4] = {
831 {13270, -6295, -2041},
833 { 228, -835, 4329} };
834 static const int16_t rgb2xyz_matrix[3][4] = {
838 static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
840 memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
841 memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix));
842 c->xyzgamma = xyzgamma_tab;
843 c->rgbgamma = rgbgamma_tab;
844 c->xyzgammainv = xyzgammainv_tab;
845 c->rgbgammainv = rgbgammainv_tab;
847 if (rgbgamma_tab[4095])
850 /* set gamma vectors */
851 for (i = 0; i < 4096; i++) {
852 xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
853 rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
854 xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
855 rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
859 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
860 int srcRange, const int table[4], int dstRange,
861 int brightness, int contrast, int saturation)
863 const AVPixFmtDescriptor *desc_dst;
864 const AVPixFmtDescriptor *desc_src;
868 desc_dst = av_pix_fmt_desc_get(c->dstFormat);
869 desc_src = av_pix_fmt_desc_get(c->srcFormat);
871 if(!isYUV(c->dstFormat) && !isGray(c->dstFormat))
873 if(!isYUV(c->srcFormat) && !isGray(c->srcFormat))
876 if (c->srcRange != srcRange ||
877 c->dstRange != dstRange ||
878 c->brightness != brightness ||
879 c->contrast != contrast ||
880 c->saturation != saturation ||
881 memcmp(c->srcColorspaceTable, inv_table, sizeof(int) * 4) ||
882 memcmp(c->dstColorspaceTable, table, sizeof(int) * 4)
886 memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4);
887 memmove(c->dstColorspaceTable, table, sizeof(int) * 4);
891 c->brightness = brightness;
892 c->contrast = contrast;
893 c->saturation = saturation;
894 c->srcRange = srcRange;
895 c->dstRange = dstRange;
897 //The srcBpc check is possibly wrong but we seem to lack a definitive reference to test this
898 //and what we have in ticket 2939 looks better with this check
899 if (need_reinit && (c->srcBpc == 8 || !isYUV(c->srcFormat)))
900 ff_sws_init_range_convert(c);
902 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
903 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
905 if (c->cascaded_context[c->cascaded_mainindex])
906 return sws_setColorspaceDetails(c->cascaded_context[c->cascaded_mainindex],inv_table, srcRange,table, dstRange, brightness, contrast, saturation);
911 if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat))) {
912 if (!c->cascaded_context[0] &&
913 memcmp(c->dstColorspaceTable, c->srcColorspaceTable, sizeof(int) * 4) &&
914 c->srcW && c->srcH && c->dstW && c->dstH) {
915 enum AVPixelFormat tmp_format;
916 int tmp_width, tmp_height;
922 av_log(c, AV_LOG_VERBOSE, "YUV color matrix differs for YUV->YUV, using intermediate RGB to convert\n");
924 if (isNBPS(c->dstFormat) || is16BPS(c->dstFormat)) {
925 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
926 tmp_format = AV_PIX_FMT_BGRA64;
928 tmp_format = AV_PIX_FMT_BGR48;
931 if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
932 tmp_format = AV_PIX_FMT_BGRA;
934 tmp_format = AV_PIX_FMT_BGR24;
938 if (srcW*srcH > dstW*dstH) {
946 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
947 tmp_width, tmp_height, tmp_format, 64);
951 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, c->srcFormat,
952 tmp_width, tmp_height, tmp_format,
954 if (!c->cascaded_context[0])
957 c->cascaded_context[0]->alphablend = c->alphablend;
958 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
961 //we set both src and dst depending on that the RGB side will be ignored
962 sws_setColorspaceDetails(c->cascaded_context[0], inv_table,
963 srcRange, table, dstRange,
964 brightness, contrast, saturation);
966 c->cascaded_context[1] = sws_getContext(tmp_width, tmp_height, tmp_format,
967 dstW, dstH, c->dstFormat,
968 c->flags, NULL, NULL, c->param);
969 if (!c->cascaded_context[1])
971 sws_setColorspaceDetails(c->cascaded_context[1], inv_table,
972 srcRange, table, dstRange,
973 0, 1 << 16, 1 << 16);
979 if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) {
980 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness,
981 contrast, saturation);
985 ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness,
986 contrast, saturation);
989 fill_rgb2yuv_table(c, table, dstRange);
994 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
995 int *srcRange, int **table, int *dstRange,
996 int *brightness, int *contrast, int *saturation)
1001 *inv_table = c->srcColorspaceTable;
1002 *table = c->dstColorspaceTable;
1003 *srcRange = c->srcRange;
1004 *dstRange = c->dstRange;
1005 *brightness = c->brightness;
1006 *contrast = c->contrast;
1007 *saturation = c->saturation;
1012 static int handle_jpeg(enum AVPixelFormat *format)
1015 case AV_PIX_FMT_YUVJ420P:
1016 *format = AV_PIX_FMT_YUV420P;
1018 case AV_PIX_FMT_YUVJ411P:
1019 *format = AV_PIX_FMT_YUV411P;
1021 case AV_PIX_FMT_YUVJ422P:
1022 *format = AV_PIX_FMT_YUV422P;
1024 case AV_PIX_FMT_YUVJ444P:
1025 *format = AV_PIX_FMT_YUV444P;
1027 case AV_PIX_FMT_YUVJ440P:
1028 *format = AV_PIX_FMT_YUV440P;
1030 case AV_PIX_FMT_GRAY8:
1031 case AV_PIX_FMT_YA8:
1032 case AV_PIX_FMT_GRAY9LE:
1033 case AV_PIX_FMT_GRAY9BE:
1034 case AV_PIX_FMT_GRAY10LE:
1035 case AV_PIX_FMT_GRAY10BE:
1036 case AV_PIX_FMT_GRAY12LE:
1037 case AV_PIX_FMT_GRAY12BE:
1038 case AV_PIX_FMT_GRAY14LE:
1039 case AV_PIX_FMT_GRAY14BE:
1040 case AV_PIX_FMT_GRAY16LE:
1041 case AV_PIX_FMT_GRAY16BE:
1042 case AV_PIX_FMT_YA16BE:
1043 case AV_PIX_FMT_YA16LE:
1050 static int handle_0alpha(enum AVPixelFormat *format)
1053 case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
1054 case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
1055 case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
1056 case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
1061 static int handle_xyz(enum AVPixelFormat *format)
1064 case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
1065 case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
1070 static void handle_formats(SwsContext *c)
1072 c->src0Alpha |= handle_0alpha(&c->srcFormat);
1073 c->dst0Alpha |= handle_0alpha(&c->dstFormat);
1074 c->srcXYZ |= handle_xyz(&c->srcFormat);
1075 c->dstXYZ |= handle_xyz(&c->dstFormat);
1076 if (c->srcXYZ || c->dstXYZ)
1080 SwsContext *sws_alloc_context(void)
1082 SwsContext *c = av_mallocz(sizeof(SwsContext));
1084 av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32));
1087 c->av_class = &ff_sws_context_class;
1088 av_opt_set_defaults(c);
1094 static uint16_t * alloc_gamma_tbl(double e)
1098 tbl = (uint16_t*)av_malloc(sizeof(uint16_t) * 1 << 16);
1102 for (i = 0; i < 65536; ++i) {
1103 tbl[i] = pow(i / 65535.0, e) * 65535.0;
1108 static enum AVPixelFormat alphaless_fmt(enum AVPixelFormat fmt)
1111 case AV_PIX_FMT_ARGB: return AV_PIX_FMT_RGB24;
1112 case AV_PIX_FMT_RGBA: return AV_PIX_FMT_RGB24;
1113 case AV_PIX_FMT_ABGR: return AV_PIX_FMT_BGR24;
1114 case AV_PIX_FMT_BGRA: return AV_PIX_FMT_BGR24;
1115 case AV_PIX_FMT_YA8: return AV_PIX_FMT_GRAY8;
1117 case AV_PIX_FMT_YUVA420P: return AV_PIX_FMT_YUV420P;
1118 case AV_PIX_FMT_YUVA422P: return AV_PIX_FMT_YUV422P;
1119 case AV_PIX_FMT_YUVA444P: return AV_PIX_FMT_YUV444P;
1121 case AV_PIX_FMT_GBRAP: return AV_PIX_FMT_GBRP;
1123 case AV_PIX_FMT_GBRAP10LE: return AV_PIX_FMT_GBRP10;
1124 case AV_PIX_FMT_GBRAP10BE: return AV_PIX_FMT_GBRP10;
1126 case AV_PIX_FMT_GBRAP12LE: return AV_PIX_FMT_GBRP12;
1127 case AV_PIX_FMT_GBRAP12BE: return AV_PIX_FMT_GBRP12;
1129 case AV_PIX_FMT_GBRAP16LE: return AV_PIX_FMT_GBRP16;
1130 case AV_PIX_FMT_GBRAP16BE: return AV_PIX_FMT_GBRP16;
1132 case AV_PIX_FMT_RGBA64LE: return AV_PIX_FMT_RGB48;
1133 case AV_PIX_FMT_RGBA64BE: return AV_PIX_FMT_RGB48;
1134 case AV_PIX_FMT_BGRA64LE: return AV_PIX_FMT_BGR48;
1135 case AV_PIX_FMT_BGRA64BE: return AV_PIX_FMT_BGR48;
1137 case AV_PIX_FMT_YA16BE: return AV_PIX_FMT_GRAY16;
1138 case AV_PIX_FMT_YA16LE: return AV_PIX_FMT_GRAY16;
1140 case AV_PIX_FMT_YUVA420P9BE: return AV_PIX_FMT_YUV420P9;
1141 case AV_PIX_FMT_YUVA422P9BE: return AV_PIX_FMT_YUV422P9;
1142 case AV_PIX_FMT_YUVA444P9BE: return AV_PIX_FMT_YUV444P9;
1143 case AV_PIX_FMT_YUVA420P9LE: return AV_PIX_FMT_YUV420P9;
1144 case AV_PIX_FMT_YUVA422P9LE: return AV_PIX_FMT_YUV422P9;
1145 case AV_PIX_FMT_YUVA444P9LE: return AV_PIX_FMT_YUV444P9;
1146 case AV_PIX_FMT_YUVA420P10BE: return AV_PIX_FMT_YUV420P10;
1147 case AV_PIX_FMT_YUVA422P10BE: return AV_PIX_FMT_YUV422P10;
1148 case AV_PIX_FMT_YUVA444P10BE: return AV_PIX_FMT_YUV444P10;
1149 case AV_PIX_FMT_YUVA420P10LE: return AV_PIX_FMT_YUV420P10;
1150 case AV_PIX_FMT_YUVA422P10LE: return AV_PIX_FMT_YUV422P10;
1151 case AV_PIX_FMT_YUVA444P10LE: return AV_PIX_FMT_YUV444P10;
1152 case AV_PIX_FMT_YUVA420P16BE: return AV_PIX_FMT_YUV420P16;
1153 case AV_PIX_FMT_YUVA422P16BE: return AV_PIX_FMT_YUV422P16;
1154 case AV_PIX_FMT_YUVA444P16BE: return AV_PIX_FMT_YUV444P16;
1155 case AV_PIX_FMT_YUVA420P16LE: return AV_PIX_FMT_YUV420P16;
1156 case AV_PIX_FMT_YUVA422P16LE: return AV_PIX_FMT_YUV422P16;
1157 case AV_PIX_FMT_YUVA444P16LE: return AV_PIX_FMT_YUV444P16;
1159 // case AV_PIX_FMT_AYUV64LE:
1160 // case AV_PIX_FMT_AYUV64BE:
1161 // case AV_PIX_FMT_PAL8:
1162 default: return AV_PIX_FMT_NONE;
1166 av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
1167 SwsFilter *dstFilter)
1170 int usesVFilter, usesHFilter;
1172 SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
1177 int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
1178 int flags, cpu_flags;
1179 enum AVPixelFormat srcFormat = c->srcFormat;
1180 enum AVPixelFormat dstFormat = c->dstFormat;
1181 const AVPixFmtDescriptor *desc_src;
1182 const AVPixFmtDescriptor *desc_dst;
1184 enum AVPixelFormat tmpFmt;
1185 static const float float_mult = 1.0f / 255.0f;
1187 cpu_flags = av_get_cpu_flags();
1191 ff_sws_rgb2rgb_init();
1193 unscaled = (srcW == dstW && srcH == dstH);
1195 c->srcRange |= handle_jpeg(&c->srcFormat);
1196 c->dstRange |= handle_jpeg(&c->dstFormat);
1198 if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat)
1199 av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
1201 if (!c->contrast && !c->saturation && !c->dstFormatBpp)
1202 sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
1203 ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
1204 c->dstRange, 0, 1 << 16, 1 << 16);
1207 srcFormat = c->srcFormat;
1208 dstFormat = c->dstFormat;
1209 desc_src = av_pix_fmt_desc_get(srcFormat);
1210 desc_dst = av_pix_fmt_desc_get(dstFormat);
1212 // If the source has no alpha then disable alpha blendaway
1214 c->alphablend = SWS_ALPHA_BLEND_NONE;
1216 if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
1217 av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
1218 if (!sws_isSupportedInput(srcFormat)) {
1219 av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
1220 av_get_pix_fmt_name(srcFormat));
1221 return AVERROR(EINVAL);
1223 if (!sws_isSupportedOutput(dstFormat)) {
1224 av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
1225 av_get_pix_fmt_name(dstFormat));
1226 return AVERROR(EINVAL);
1229 av_assert2(desc_src && desc_dst);
1231 i = flags & (SWS_POINT |
1243 /* provide a default scaler if not set by caller */
1245 if (dstW < srcW && dstH < srcH)
1246 flags |= SWS_BICUBIC;
1247 else if (dstW > srcW && dstH > srcH)
1248 flags |= SWS_BICUBIC;
1250 flags |= SWS_BICUBIC;
1252 } else if (i & (i - 1)) {
1253 av_log(c, AV_LOG_ERROR,
1254 "Exactly one scaler algorithm must be chosen, got %X\n", i);
1255 return AVERROR(EINVAL);
1258 if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) {
1259 /* FIXME check if these are enough and try to lower them after
1260 * fixing the relevant parts of the code */
1261 av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
1262 srcW, srcH, dstW, dstH);
1263 return AVERROR(EINVAL);
1265 if (flags & SWS_FAST_BILINEAR) {
1266 if (srcW < 8 || dstW < 8) {
1267 flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
1273 dstFilter = &dummyFilter;
1275 srcFilter = &dummyFilter;
1277 c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
1278 c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
1279 c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
1280 c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
1281 c->vRounder = 4 * 0x0001000100010001ULL;
1283 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) ||
1284 (srcFilter->chrV && srcFilter->chrV->length > 1) ||
1285 (dstFilter->lumV && dstFilter->lumV->length > 1) ||
1286 (dstFilter->chrV && dstFilter->chrV->length > 1);
1287 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) ||
1288 (srcFilter->chrH && srcFilter->chrH->length > 1) ||
1289 (dstFilter->lumH && dstFilter->lumH->length > 1) ||
1290 (dstFilter->chrH && dstFilter->chrH->length > 1);
1292 av_pix_fmt_get_chroma_sub_sample(srcFormat, &c->chrSrcHSubSample, &c->chrSrcVSubSample);
1293 av_pix_fmt_get_chroma_sub_sample(dstFormat, &c->chrDstHSubSample, &c->chrDstVSubSample);
1295 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
1297 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
1298 flags |= SWS_FULL_CHR_H_INT;
1302 if ( c->chrSrcHSubSample == 0
1303 && c->chrSrcVSubSample == 0
1304 && c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER
1305 && !(c->flags & SWS_FAST_BILINEAR)
1307 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n");
1308 flags |= SWS_FULL_CHR_H_INT;
1313 if (c->dither == SWS_DITHER_AUTO) {
1314 if (flags & SWS_ERROR_DIFFUSION)
1315 c->dither = SWS_DITHER_ED;
1318 if(dstFormat == AV_PIX_FMT_BGR4_BYTE ||
1319 dstFormat == AV_PIX_FMT_RGB4_BYTE ||
1320 dstFormat == AV_PIX_FMT_BGR8 ||
1321 dstFormat == AV_PIX_FMT_RGB8) {
1322 if (c->dither == SWS_DITHER_AUTO)
1323 c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
1324 if (!(flags & SWS_FULL_CHR_H_INT)) {
1325 if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER) {
1326 av_log(c, AV_LOG_DEBUG,
1327 "Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
1328 av_get_pix_fmt_name(dstFormat));
1329 flags |= SWS_FULL_CHR_H_INT;
1333 if (flags & SWS_FULL_CHR_H_INT) {
1334 if (c->dither == SWS_DITHER_BAYER) {
1335 av_log(c, AV_LOG_DEBUG,
1336 "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
1337 av_get_pix_fmt_name(dstFormat));
1338 c->dither = SWS_DITHER_ED;
1342 if (isPlanarRGB(dstFormat)) {
1343 if (!(flags & SWS_FULL_CHR_H_INT)) {
1344 av_log(c, AV_LOG_DEBUG,
1345 "%s output is not supported with half chroma resolution, switching to full\n",
1346 av_get_pix_fmt_name(dstFormat));
1347 flags |= SWS_FULL_CHR_H_INT;
1352 /* reuse chroma for 2 pixels RGB/BGR unless user wants full
1353 * chroma interpolation */
1354 if (flags & SWS_FULL_CHR_H_INT &&
1355 isAnyRGB(dstFormat) &&
1356 !isPlanarRGB(dstFormat) &&
1357 dstFormat != AV_PIX_FMT_RGBA64LE &&
1358 dstFormat != AV_PIX_FMT_RGBA64BE &&
1359 dstFormat != AV_PIX_FMT_BGRA64LE &&
1360 dstFormat != AV_PIX_FMT_BGRA64BE &&
1361 dstFormat != AV_PIX_FMT_RGB48LE &&
1362 dstFormat != AV_PIX_FMT_RGB48BE &&
1363 dstFormat != AV_PIX_FMT_BGR48LE &&
1364 dstFormat != AV_PIX_FMT_BGR48BE &&
1365 dstFormat != AV_PIX_FMT_RGBA &&
1366 dstFormat != AV_PIX_FMT_ARGB &&
1367 dstFormat != AV_PIX_FMT_BGRA &&
1368 dstFormat != AV_PIX_FMT_ABGR &&
1369 dstFormat != AV_PIX_FMT_RGB24 &&
1370 dstFormat != AV_PIX_FMT_BGR24 &&
1371 dstFormat != AV_PIX_FMT_BGR4_BYTE &&
1372 dstFormat != AV_PIX_FMT_RGB4_BYTE &&
1373 dstFormat != AV_PIX_FMT_BGR8 &&
1374 dstFormat != AV_PIX_FMT_RGB8
1376 av_log(c, AV_LOG_WARNING,
1377 "full chroma interpolation for destination format '%s' not yet implemented\n",
1378 av_get_pix_fmt_name(dstFormat));
1379 flags &= ~SWS_FULL_CHR_H_INT;
1382 if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
1383 c->chrDstHSubSample = 1;
1385 // drop some chroma lines if the user wants it
1386 c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >>
1387 SWS_SRC_V_CHR_DROP_SHIFT;
1388 c->chrSrcVSubSample += c->vChrDrop;
1390 /* drop every other pixel for chroma calculation unless user
1391 * wants full chroma */
1392 if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) &&
1393 srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 &&
1394 srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 &&
1395 srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE &&
1396 srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE &&
1397 srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE &&
1398 srcFormat != AV_PIX_FMT_GBRAP10BE && srcFormat != AV_PIX_FMT_GBRAP10LE &&
1399 srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE &&
1400 srcFormat != AV_PIX_FMT_GBRAP12BE && srcFormat != AV_PIX_FMT_GBRAP12LE &&
1401 srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE &&
1402 srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE &&
1403 srcFormat != AV_PIX_FMT_GBRAP16BE && srcFormat != AV_PIX_FMT_GBRAP16LE &&
1404 ((dstW >> c->chrDstHSubSample) <= (srcW >> 1) ||
1405 (flags & SWS_FAST_BILINEAR)))
1406 c->chrSrcHSubSample = 1;
1408 // Note the AV_CEIL_RSHIFT is so that we always round toward +inf.
1409 c->chrSrcW = AV_CEIL_RSHIFT(srcW, c->chrSrcHSubSample);
1410 c->chrSrcH = AV_CEIL_RSHIFT(srcH, c->chrSrcVSubSample);
1411 c->chrDstW = AV_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
1412 c->chrDstH = AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
1414 FF_ALLOCZ_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
1416 c->srcBpc = desc_src->comp[0].depth;
1419 c->dstBpc = desc_dst->comp[0].depth;
1422 if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8)
1424 if (c->dstBpc == 16)
1427 if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
1428 c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 &&
1429 c->chrDstW >= c->chrSrcW &&
1431 if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (srcW & 15) == 0
1433 && (flags & SWS_FAST_BILINEAR)) {
1434 if (flags & SWS_PRINT_INFO)
1435 av_log(c, AV_LOG_INFO,
1436 "output width is not a multiple of 32 -> no MMXEXT scaler\n");
1438 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat))
1439 c->canMMXEXTBeUsed = 0;
1441 c->canMMXEXTBeUsed = 0;
1443 c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW;
1444 c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH;
1446 /* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src
1447 * to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do
1449 * n-2 is the last chrominance sample available.
1450 * This is not perfect, but no one should notice the difference, the more
1451 * correct variant would be like the vertical one, but that would require
1452 * some special code for the first and last pixel */
1453 if (flags & SWS_FAST_BILINEAR) {
1454 if (c->canMMXEXTBeUsed) {
1458 // we don't use the x86 asm scaler if MMX is available
1459 else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) {
1460 c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
1461 c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20;
1465 // hardcoded for now
1466 c->gamma_value = 2.2;
1467 tmpFmt = AV_PIX_FMT_RGBA64LE;
1470 if (!unscaled && c->gamma_flag && (srcFormat != tmpFmt || dstFormat != tmpFmt)) {
1472 c->cascaded_context[0] = NULL;
1474 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1475 srcW, srcH, tmpFmt, 64);
1479 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1481 flags, NULL, NULL, c->param);
1482 if (!c->cascaded_context[0]) {
1486 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFmt,
1488 flags, srcFilter, dstFilter, c->param);
1490 if (!c->cascaded_context[1])
1493 c2 = c->cascaded_context[1];
1494 c2->is_internal_gamma = 1;
1495 c2->gamma = alloc_gamma_tbl( c->gamma_value);
1496 c2->inv_gamma = alloc_gamma_tbl(1.f/c->gamma_value);
1497 if (!c2->gamma || !c2->inv_gamma)
1498 return AVERROR(ENOMEM);
1500 // is_internal_flag is set after creating the context
1501 // to properly create the gamma convert FilterDescriptor
1502 // we have to re-initialize it
1503 ff_free_filters(c2);
1504 if (ff_init_filters(c2) < 0) {
1505 sws_freeContext(c2);
1506 c->cascaded_context[1] = NULL;
1510 c->cascaded_context[2] = NULL;
1511 if (dstFormat != tmpFmt) {
1512 ret = av_image_alloc(c->cascaded1_tmp, c->cascaded1_tmpStride,
1513 dstW, dstH, tmpFmt, 64);
1517 c->cascaded_context[2] = sws_getContext(dstW, dstH, tmpFmt,
1518 dstW, dstH, dstFormat,
1519 flags, NULL, NULL, c->param);
1520 if (!c->cascaded_context[2])
1526 if (isBayer(srcFormat)) {
1528 (dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
1529 enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
1531 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1532 srcW, srcH, tmpFormat, 64);
1536 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1537 srcW, srcH, tmpFormat,
1538 flags, srcFilter, NULL, c->param);
1539 if (!c->cascaded_context[0])
1542 c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
1543 dstW, dstH, dstFormat,
1544 flags, NULL, dstFilter, c->param);
1545 if (!c->cascaded_context[1])
1551 if (unscaled && c->srcBpc == 8 && dstFormat == AV_PIX_FMT_GRAYF32){
1552 for (i = 0; i < 256; ++i){
1553 c->uint2float_lut[i] = (float)i * float_mult;
1557 // float will be converted to uint16_t
1558 if ((srcFormat == AV_PIX_FMT_GRAYF32BE || srcFormat == AV_PIX_FMT_GRAYF32LE) &&
1559 (!unscaled || unscaled && dstFormat != srcFormat && (srcFormat != AV_PIX_FMT_GRAYF32 ||
1560 dstFormat != AV_PIX_FMT_GRAY8))){
1564 if (CONFIG_SWSCALE_ALPHA && isALPHA(srcFormat) && !isALPHA(dstFormat)) {
1565 enum AVPixelFormat tmpFormat = alphaless_fmt(srcFormat);
1567 if (tmpFormat != AV_PIX_FMT_NONE && c->alphablend != SWS_ALPHA_BLEND_NONE)
1569 dstFormat != tmpFormat ||
1570 usesHFilter || usesVFilter ||
1571 c->srcRange != c->dstRange
1573 c->cascaded_mainindex = 1;
1574 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1575 srcW, srcH, tmpFormat, 64);
1579 c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, srcFormat,
1580 srcW, srcH, tmpFormat,
1582 if (!c->cascaded_context[0])
1584 c->cascaded_context[0]->alphablend = c->alphablend;
1585 ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
1589 c->cascaded_context[1] = sws_alloc_set_opts(srcW, srcH, tmpFormat,
1590 dstW, dstH, dstFormat,
1592 if (!c->cascaded_context[1])
1595 c->cascaded_context[1]->srcRange = c->srcRange;
1596 c->cascaded_context[1]->dstRange = c->dstRange;
1597 ret = sws_init_context(c->cascaded_context[1], srcFilter , dstFilter);
1605 #if HAVE_MMAP && HAVE_MPROTECT && defined(MAP_ANONYMOUS)
1611 /* precalculate horizontal scaler filter coefficients */
1613 #if HAVE_MMXEXT_INLINE
1614 // can't downscale !!!
1615 if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) {
1616 c->lumMmxextFilterCodeSize = ff_init_hscaler_mmxext(dstW, c->lumXInc, NULL,
1618 c->chrMmxextFilterCodeSize = ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc,
1619 NULL, NULL, NULL, 4);
1622 c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize,
1623 PROT_READ | PROT_WRITE,
1624 MAP_PRIVATE | MAP_ANONYMOUS,
1626 c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize,
1627 PROT_READ | PROT_WRITE,
1628 MAP_PRIVATE | MAP_ANONYMOUS,
1630 #elif HAVE_VIRTUALALLOC
1631 c->lumMmxextFilterCode = VirtualAlloc(NULL,
1632 c->lumMmxextFilterCodeSize,
1634 PAGE_EXECUTE_READWRITE);
1635 c->chrMmxextFilterCode = VirtualAlloc(NULL,
1636 c->chrMmxextFilterCodeSize,
1638 PAGE_EXECUTE_READWRITE);
1640 c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize);
1641 c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize);
1644 #ifdef MAP_ANONYMOUS
1645 if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED)
1647 if (!c->lumMmxextFilterCode || !c->chrMmxextFilterCode)
1650 av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
1651 return AVERROR(ENOMEM);
1654 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail);
1655 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail);
1656 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail);
1657 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail);
1659 ff_init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode,
1660 c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
1661 ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode,
1662 c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
1665 if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1
1666 || mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) {
1667 av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
1672 #endif /* HAVE_MMXEXT_INLINE */
1674 const int filterAlign = X86_MMX(cpu_flags) ? 4 :
1675 PPC_ALTIVEC(cpu_flags) ? 8 :
1676 have_neon(cpu_flags) ? 8 : 1;
1678 if ((ret = initFilter(&c->hLumFilter, &c->hLumFilterPos,
1679 &c->hLumFilterSize, c->lumXInc,
1680 srcW, dstW, filterAlign, 1 << 14,
1681 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1682 cpu_flags, srcFilter->lumH, dstFilter->lumH,
1684 get_local_pos(c, 0, 0, 0),
1685 get_local_pos(c, 0, 0, 0))) < 0)
1687 if ((ret = initFilter(&c->hChrFilter, &c->hChrFilterPos,
1688 &c->hChrFilterSize, c->chrXInc,
1689 c->chrSrcW, c->chrDstW, filterAlign, 1 << 14,
1690 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1691 cpu_flags, srcFilter->chrH, dstFilter->chrH,
1693 get_local_pos(c, c->chrSrcHSubSample, c->src_h_chr_pos, 0),
1694 get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0))) < 0)
1697 } // initialize horizontal stuff
1699 /* precalculate vertical scaler filter coefficients */
1701 const int filterAlign = X86_MMX(cpu_flags) ? 2 :
1702 PPC_ALTIVEC(cpu_flags) ? 8 :
1703 have_neon(cpu_flags) ? 2 : 1;
1705 if ((ret = initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize,
1706 c->lumYInc, srcH, dstH, filterAlign, (1 << 12),
1707 (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1708 cpu_flags, srcFilter->lumV, dstFilter->lumV,
1710 get_local_pos(c, 0, 0, 1),
1711 get_local_pos(c, 0, 0, 1))) < 0)
1713 if ((ret = initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize,
1714 c->chrYInc, c->chrSrcH, c->chrDstH,
1715 filterAlign, (1 << 12),
1716 (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1717 cpu_flags, srcFilter->chrV, dstFilter->chrV,
1719 get_local_pos(c, c->chrSrcVSubSample, c->src_v_chr_pos, 1),
1720 get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1))) < 0)
1725 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail);
1726 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail);
1728 for (i = 0; i < c->vLumFilterSize * c->dstH; i++) {
1730 short *p = (short *)&c->vYCoeffsBank[i];
1731 for (j = 0; j < 8; j++)
1732 p[j] = c->vLumFilter[i];
1735 for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) {
1737 short *p = (short *)&c->vCCoeffsBank[i];
1738 for (j = 0; j < 8; j++)
1739 p[j] = c->vChrFilter[i];
1744 for (i = 0; i < 4; i++)
1745 FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
1747 c->needAlpha = (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) ? 1 : 0;
1749 // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
1750 c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
1751 c->uv_offx2 = dst_stride + 16;
1753 av_assert0(c->chrDstH <= dstH);
1755 if (flags & SWS_PRINT_INFO) {
1756 const char *scaler = NULL, *cpucaps;
1758 for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
1759 if (flags & scale_algorithms[i].flag) {
1760 scaler = scale_algorithms[i].description;
1765 scaler = "ehh flags invalid?!";
1766 av_log(c, AV_LOG_INFO, "%s scaler, from %s to %s%s ",
1768 av_get_pix_fmt_name(srcFormat),
1770 dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 ||
1771 dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE ||
1772 dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ?
1777 av_get_pix_fmt_name(dstFormat));
1779 if (INLINE_MMXEXT(cpu_flags))
1781 else if (INLINE_AMD3DNOW(cpu_flags))
1783 else if (INLINE_MMX(cpu_flags))
1785 else if (PPC_ALTIVEC(cpu_flags))
1786 cpucaps = "AltiVec";
1790 av_log(c, AV_LOG_INFO, "using %s\n", cpucaps);
1792 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1793 av_log(c, AV_LOG_DEBUG,
1794 "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1795 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1796 av_log(c, AV_LOG_DEBUG,
1797 "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1798 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH,
1799 c->chrXInc, c->chrYInc);
1802 /* alpha blend special case, note this has been split via cascaded contexts if its scaled */
1803 if (unscaled && !usesHFilter && !usesVFilter &&
1804 c->alphablend != SWS_ALPHA_BLEND_NONE &&
1805 isALPHA(srcFormat) &&
1806 (c->srcRange == c->dstRange || isAnyRGB(dstFormat)) &&
1807 alphaless_fmt(srcFormat) == dstFormat
1809 c->swscale = ff_sws_alphablendaway;
1811 if (flags & SWS_PRINT_INFO)
1812 av_log(c, AV_LOG_INFO,
1813 "using alpha blendaway %s -> %s special converter\n",
1814 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1818 /* unscaled special cases */
1819 if (unscaled && !usesHFilter && !usesVFilter &&
1820 (c->srcRange == c->dstRange || isAnyRGB(dstFormat) ||
1821 isFloat(srcFormat) || isFloat(dstFormat))){
1822 ff_get_unscaled_swscale(c);
1825 if (flags & SWS_PRINT_INFO)
1826 av_log(c, AV_LOG_INFO,
1827 "using unscaled %s -> %s special converter\n",
1828 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1833 c->swscale = ff_getSwsFunc(c);
1834 return ff_init_filters(c);
1835 fail: // FIXME replace things by appropriate error codes
1836 if (ret == RETCODE_USE_CASCADE) {
1837 int tmpW = sqrt(srcW * (int64_t)dstW);
1838 int tmpH = sqrt(srcH * (int64_t)dstH);
1839 enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P;
1841 if (isALPHA(srcFormat))
1842 tmpFormat = AV_PIX_FMT_YUVA420P;
1844 if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
1845 return AVERROR(EINVAL);
1847 ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
1848 tmpW, tmpH, tmpFormat, 64);
1852 c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1853 tmpW, tmpH, tmpFormat,
1854 flags, srcFilter, NULL, c->param);
1855 if (!c->cascaded_context[0])
1858 c->cascaded_context[1] = sws_getContext(tmpW, tmpH, tmpFormat,
1859 dstW, dstH, dstFormat,
1860 flags, NULL, dstFilter, c->param);
1861 if (!c->cascaded_context[1])
1868 SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
1869 int dstW, int dstH, enum AVPixelFormat dstFormat,
1870 int flags, const double *param)
1874 if (!(c = sws_alloc_context()))
1882 c->srcFormat = srcFormat;
1883 c->dstFormat = dstFormat;
1886 c->param[0] = param[0];
1887 c->param[1] = param[1];
1893 SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
1894 int dstW, int dstH, enum AVPixelFormat dstFormat,
1895 int flags, SwsFilter *srcFilter,
1896 SwsFilter *dstFilter, const double *param)
1900 c = sws_alloc_set_opts(srcW, srcH, srcFormat,
1901 dstW, dstH, dstFormat,
1906 if (sws_init_context(c, srcFilter, dstFilter) < 0) {
1914 static int isnan_vec(SwsVector *a)
1917 for (i=0; i<a->length; i++)
1918 if (isnan(a->coeff[i]))
1923 static void makenan_vec(SwsVector *a)
1926 for (i=0; i<a->length; i++)
1930 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1931 float lumaSharpen, float chromaSharpen,
1932 float chromaHShift, float chromaVShift,
1935 SwsFilter *filter = av_malloc(sizeof(SwsFilter));
1939 if (lumaGBlur != 0.0) {
1940 filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0);
1941 filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0);
1943 filter->lumH = sws_getIdentityVec();
1944 filter->lumV = sws_getIdentityVec();
1947 if (chromaGBlur != 0.0) {
1948 filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0);
1949 filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0);
1951 filter->chrH = sws_getIdentityVec();
1952 filter->chrV = sws_getIdentityVec();
1955 if (!filter->lumH || !filter->lumV || !filter->chrH || !filter->chrV)
1958 if (chromaSharpen != 0.0) {
1959 SwsVector *id = sws_getIdentityVec();
1962 sws_scaleVec(filter->chrH, -chromaSharpen);
1963 sws_scaleVec(filter->chrV, -chromaSharpen);
1964 sws_addVec(filter->chrH, id);
1965 sws_addVec(filter->chrV, id);
1969 if (lumaSharpen != 0.0) {
1970 SwsVector *id = sws_getIdentityVec();
1973 sws_scaleVec(filter->lumH, -lumaSharpen);
1974 sws_scaleVec(filter->lumV, -lumaSharpen);
1975 sws_addVec(filter->lumH, id);
1976 sws_addVec(filter->lumV, id);
1980 if (chromaHShift != 0.0)
1981 sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5));
1983 if (chromaVShift != 0.0)
1984 sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5));
1986 sws_normalizeVec(filter->chrH, 1.0);
1987 sws_normalizeVec(filter->chrV, 1.0);
1988 sws_normalizeVec(filter->lumH, 1.0);
1989 sws_normalizeVec(filter->lumV, 1.0);
1991 if (isnan_vec(filter->chrH) ||
1992 isnan_vec(filter->chrV) ||
1993 isnan_vec(filter->lumH) ||
1994 isnan_vec(filter->lumV))
1998 sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
2000 sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
2005 sws_freeVec(filter->lumH);
2006 sws_freeVec(filter->lumV);
2007 sws_freeVec(filter->chrH);
2008 sws_freeVec(filter->chrV);
2013 SwsVector *sws_allocVec(int length)
2017 if(length <= 0 || length > INT_MAX/ sizeof(double))
2020 vec = av_malloc(sizeof(SwsVector));
2023 vec->length = length;
2024 vec->coeff = av_malloc(sizeof(double) * length);
2030 SwsVector *sws_getGaussianVec(double variance, double quality)
2032 const int length = (int)(variance * quality + 0.5) | 1;
2034 double middle = (length - 1) * 0.5;
2037 if(variance < 0 || quality < 0)
2040 vec = sws_allocVec(length);
2045 for (i = 0; i < length; i++) {
2046 double dist = i - middle;
2047 vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
2048 sqrt(2 * variance * M_PI);
2051 sws_normalizeVec(vec, 1.0);
2057 * Allocate and return a vector with length coefficients, all
2058 * with the same value c.
2060 #if !FF_API_SWS_VECTOR
2063 SwsVector *sws_getConstVec(double c, int length)
2066 SwsVector *vec = sws_allocVec(length);
2071 for (i = 0; i < length; i++)
2078 * Allocate and return a vector with just one coefficient, with
2081 #if !FF_API_SWS_VECTOR
2084 SwsVector *sws_getIdentityVec(void)
2086 return sws_getConstVec(1.0, 1);
2089 static double sws_dcVec(SwsVector *a)
2094 for (i = 0; i < a->length; i++)
2100 void sws_scaleVec(SwsVector *a, double scalar)
2104 for (i = 0; i < a->length; i++)
2105 a->coeff[i] *= scalar;
2108 void sws_normalizeVec(SwsVector *a, double height)
2110 sws_scaleVec(a, height / sws_dcVec(a));
2113 #if FF_API_SWS_VECTOR
2114 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
2116 int length = a->length + b->length - 1;
2118 SwsVector *vec = sws_getConstVec(0.0, length);
2123 for (i = 0; i < a->length; i++) {
2124 for (j = 0; j < b->length; j++) {
2125 vec->coeff[i + j] += a->coeff[i] * b->coeff[j];
2133 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
2135 int length = FFMAX(a->length, b->length);
2137 SwsVector *vec = sws_getConstVec(0.0, length);
2142 for (i = 0; i < a->length; i++)
2143 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2144 for (i = 0; i < b->length; i++)
2145 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i];
2150 #if FF_API_SWS_VECTOR
2151 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
2153 int length = FFMAX(a->length, b->length);
2155 SwsVector *vec = sws_getConstVec(0.0, length);
2160 for (i = 0; i < a->length; i++)
2161 vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2162 for (i = 0; i < b->length; i++)
2163 vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i];
2169 /* shift left / or right if "shift" is negative */
2170 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
2172 int length = a->length + FFABS(shift) * 2;
2174 SwsVector *vec = sws_getConstVec(0.0, length);
2179 for (i = 0; i < a->length; i++) {
2180 vec->coeff[i + (length - 1) / 2 -
2181 (a->length - 1) / 2 - shift] = a->coeff[i];
2187 #if !FF_API_SWS_VECTOR
2190 void sws_shiftVec(SwsVector *a, int shift)
2192 SwsVector *shifted = sws_getShiftedVec(a, shift);
2198 a->coeff = shifted->coeff;
2199 a->length = shifted->length;
2203 #if !FF_API_SWS_VECTOR
2206 void sws_addVec(SwsVector *a, SwsVector *b)
2208 SwsVector *sum = sws_sumVec(a, b);
2214 a->coeff = sum->coeff;
2215 a->length = sum->length;
2219 #if FF_API_SWS_VECTOR
2220 void sws_subVec(SwsVector *a, SwsVector *b)
2222 SwsVector *diff = sws_diffVec(a, b);
2228 a->coeff = diff->coeff;
2229 a->length = diff->length;
2233 void sws_convVec(SwsVector *a, SwsVector *b)
2235 SwsVector *conv = sws_getConvVec(a, b);
2241 a->coeff = conv->coeff;
2242 a->length = conv->length;
2246 SwsVector *sws_cloneVec(SwsVector *a)
2248 SwsVector *vec = sws_allocVec(a->length);
2253 memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff));
2260 * Print with av_log() a textual representation of the vector a
2261 * if log_level <= av_log_level.
2263 #if !FF_API_SWS_VECTOR
2266 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
2273 for (i = 0; i < a->length; i++)
2274 if (a->coeff[i] > max)
2277 for (i = 0; i < a->length; i++)
2278 if (a->coeff[i] < min)
2283 for (i = 0; i < a->length; i++) {
2284 int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5);
2285 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
2287 av_log(log_ctx, log_level, " ");
2288 av_log(log_ctx, log_level, "|\n");
2292 void sws_freeVec(SwsVector *a)
2296 av_freep(&a->coeff);
2301 void sws_freeFilter(SwsFilter *filter)
2306 sws_freeVec(filter->lumH);
2307 sws_freeVec(filter->lumV);
2308 sws_freeVec(filter->chrH);
2309 sws_freeVec(filter->chrV);
2313 void sws_freeContext(SwsContext *c)
2319 for (i = 0; i < 4; i++)
2320 av_freep(&c->dither_error[i]);
2322 av_freep(&c->vLumFilter);
2323 av_freep(&c->vChrFilter);
2324 av_freep(&c->hLumFilter);
2325 av_freep(&c->hChrFilter);
2327 av_freep(&c->vYCoeffsBank);
2328 av_freep(&c->vCCoeffsBank);
2331 av_freep(&c->vLumFilterPos);
2332 av_freep(&c->vChrFilterPos);
2333 av_freep(&c->hLumFilterPos);
2334 av_freep(&c->hChrFilterPos);
2338 if (c->lumMmxextFilterCode)
2339 munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize);
2340 if (c->chrMmxextFilterCode)
2341 munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize);
2342 #elif HAVE_VIRTUALALLOC
2343 if (c->lumMmxextFilterCode)
2344 VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE);
2345 if (c->chrMmxextFilterCode)
2346 VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE);
2348 av_free(c->lumMmxextFilterCode);
2349 av_free(c->chrMmxextFilterCode);
2351 c->lumMmxextFilterCode = NULL;
2352 c->chrMmxextFilterCode = NULL;
2353 #endif /* HAVE_MMX_INLINE */
2355 av_freep(&c->yuvTable);
2356 av_freep(&c->formatConvBuffer);
2358 sws_freeContext(c->cascaded_context[0]);
2359 sws_freeContext(c->cascaded_context[1]);
2360 sws_freeContext(c->cascaded_context[2]);
2361 memset(c->cascaded_context, 0, sizeof(c->cascaded_context));
2362 av_freep(&c->cascaded_tmp[0]);
2363 av_freep(&c->cascaded1_tmp[0]);
2365 av_freep(&c->gamma);
2366 av_freep(&c->inv_gamma);
2373 struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
2374 int srcH, enum AVPixelFormat srcFormat,
2376 enum AVPixelFormat dstFormat, int flags,
2377 SwsFilter *srcFilter,
2378 SwsFilter *dstFilter,
2379 const double *param)
2381 static const double default_param[2] = { SWS_PARAM_DEFAULT,
2382 SWS_PARAM_DEFAULT };
2383 int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513,
2384 src_v_chr_pos = -513, dst_v_chr_pos = -513;
2387 param = default_param;
2390 (context->srcW != srcW ||
2391 context->srcH != srcH ||
2392 context->srcFormat != srcFormat ||
2393 context->dstW != dstW ||
2394 context->dstH != dstH ||
2395 context->dstFormat != dstFormat ||
2396 context->flags != flags ||
2397 context->param[0] != param[0] ||
2398 context->param[1] != param[1])) {
2400 av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos);
2401 av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos);
2402 av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos);
2403 av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos);
2404 sws_freeContext(context);
2409 if (!(context = sws_alloc_context()))
2411 context->srcW = srcW;
2412 context->srcH = srcH;
2413 context->srcFormat = srcFormat;
2414 context->dstW = dstW;
2415 context->dstH = dstH;
2416 context->dstFormat = dstFormat;
2417 context->flags = flags;
2418 context->param[0] = param[0];
2419 context->param[1] = param[1];
2421 av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0);
2422 av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0);
2423 av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0);
2424 av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0);
2426 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
2427 sws_freeContext(context);