FFmpeg  1.2.4
swscale.h
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
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.
10  *
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.
15  *
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
19  */
20 
21 #ifndef SWSCALE_SWSCALE_H
22 #define SWSCALE_SWSCALE_H
23 
35 #include <stdint.h>
36 
37 #include "libavutil/avutil.h"
38 #include "libavutil/log.h"
39 #include "libavutil/pixfmt.h"
40 #include "version.h"
41 
45 unsigned swscale_version(void);
46 
50 const char *swscale_configuration(void);
51 
55 const char *swscale_license(void);
56 
57 /* values for the flags, the stuff on the command line is different */
58 #define SWS_FAST_BILINEAR 1
59 #define SWS_BILINEAR 2
60 #define SWS_BICUBIC 4
61 #define SWS_X 8
62 #define SWS_POINT 0x10
63 #define SWS_AREA 0x20
64 #define SWS_BICUBLIN 0x40
65 #define SWS_GAUSS 0x80
66 #define SWS_SINC 0x100
67 #define SWS_LANCZOS 0x200
68 #define SWS_SPLINE 0x400
69 
70 #define SWS_SRC_V_CHR_DROP_MASK 0x30000
71 #define SWS_SRC_V_CHR_DROP_SHIFT 16
72 
73 #define SWS_PARAM_DEFAULT 123456
74 
75 #define SWS_PRINT_INFO 0x1000
76 
77 //the following 3 flags are not completely implemented
78 //internal chrominace subsampling info
79 #define SWS_FULL_CHR_H_INT 0x2000
80 //input subsampling info
81 #define SWS_FULL_CHR_H_INP 0x4000
82 #define SWS_DIRECT_BGR 0x8000
83 #define SWS_ACCURATE_RND 0x40000
84 #define SWS_BITEXACT 0x80000
85 #define SWS_ERROR_DIFFUSION 0x800000
86 
87 #if FF_API_SWS_CPU_CAPS
88 
92 #define SWS_CPU_CAPS_MMX 0x80000000
93 #define SWS_CPU_CAPS_MMXEXT 0x20000000
94 #define SWS_CPU_CAPS_MMX2 0x20000000
95 #define SWS_CPU_CAPS_3DNOW 0x40000000
96 #define SWS_CPU_CAPS_ALTIVEC 0x10000000
97 #define SWS_CPU_CAPS_BFIN 0x01000000
98 #define SWS_CPU_CAPS_SSE2 0x02000000
99 #endif
100 
101 #define SWS_MAX_REDUCE_CUTOFF 0.002
102 
103 #define SWS_CS_ITU709 1
104 #define SWS_CS_FCC 4
105 #define SWS_CS_ITU601 5
106 #define SWS_CS_ITU624 5
107 #define SWS_CS_SMPTE170M 5
108 #define SWS_CS_SMPTE240M 7
109 #define SWS_CS_DEFAULT 5
110 
118 const int *sws_getCoefficients(int colorspace);
119 
120 // when used for filters they must have an odd number of elements
121 // coeffs cannot be shared between vectors
122 typedef struct SwsVector {
123  double *coeff;
124  int length;
125 } SwsVector;
126 
127 // vectors can be shared
128 typedef struct SwsFilter {
133 } SwsFilter;
134 
135 struct SwsContext;
136 
142 
148 
154 struct SwsContext *sws_alloc_context(void);
155 
162 int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter);
163 
168 void sws_freeContext(struct SwsContext *swsContext);
169 
170 #if FF_API_SWS_GETCONTEXT
171 
188  int dstW, int dstH, enum AVPixelFormat dstFormat,
189  int flags, SwsFilter *srcFilter,
190  SwsFilter *dstFilter, const double *param);
191 #endif
192 
219 int sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[],
220  const int srcStride[], int srcSliceY, int srcSliceH,
221  uint8_t *const dst[], const int dstStride[]);
222 
233 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
234  int srcRange, const int table[4], int dstRange,
235  int brightness, int contrast, int saturation);
236 
240 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
241  int *srcRange, int **table, int *dstRange,
242  int *brightness, int *contrast, int *saturation);
243 
247 SwsVector *sws_allocVec(int length);
248 
253 SwsVector *sws_getGaussianVec(double variance, double quality);
254 
259 SwsVector *sws_getConstVec(double c, int length);
260 
266 
270 void sws_scaleVec(SwsVector *a, double scalar);
271 
275 void sws_normalizeVec(SwsVector *a, double height);
277 void sws_addVec(SwsVector *a, SwsVector *b);
278 void sws_subVec(SwsVector *a, SwsVector *b);
279 void sws_shiftVec(SwsVector *a, int shift);
280 
286 
291 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
292 
293 void sws_freeVec(SwsVector *a);
294 
295 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
296  float lumaSharpen, float chromaSharpen,
297  float chromaHShift, float chromaVShift,
298  int verbose);
300 
313 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
314  int srcW, int srcH, enum AVPixelFormat srcFormat,
315  int dstW, int dstH, enum AVPixelFormat dstFormat,
316  int flags, SwsFilter *srcFilter,
317  SwsFilter *dstFilter, const double *param);
318 
329 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
330 
341 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
342 
349 const AVClass *sws_get_class(void);
350 
355 #endif /* SWSCALE_SWSCALE_H */