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libswscale/swscale.h

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00001 /*
00002  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #ifndef SWSCALE_SWSCALE_H
00022 #define SWSCALE_SWSCALE_H
00023 
00030 #include "libavutil/avutil.h"
00031 
00032 #define LIBSWSCALE_VERSION_MAJOR 0
00033 #define LIBSWSCALE_VERSION_MINOR 14
00034 #define LIBSWSCALE_VERSION_MICRO 1
00035 
00036 #define LIBSWSCALE_VERSION_INT  AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
00037                                                LIBSWSCALE_VERSION_MINOR, \
00038                                                LIBSWSCALE_VERSION_MICRO)
00039 #define LIBSWSCALE_VERSION      AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
00040                                            LIBSWSCALE_VERSION_MINOR, \
00041                                            LIBSWSCALE_VERSION_MICRO)
00042 #define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT
00043 
00044 #define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
00045 
00050 #ifndef FF_API_SWS_GETCONTEXT
00051 #define FF_API_SWS_GETCONTEXT  (LIBSWSCALE_VERSION_MAJOR < 3)
00052 #endif
00053 #ifndef FF_API_SWS_CPU_CAPS
00054 #define FF_API_SWS_CPU_CAPS    (LIBSWSCALE_VERSION_MAJOR < 3)
00055 #endif
00056 #ifndef FF_API_SWS_FORMAT_NAME
00057 #define FF_API_SWS_FORMAT_NAME  (LIBSWSCALE_VERSION_MAJOR < 3)
00058 #endif
00059 
00063 unsigned swscale_version(void);
00064 
00068 const char *swscale_configuration(void);
00069 
00073 const char *swscale_license(void);
00074 
00075 /* values for the flags, the stuff on the command line is different */
00076 #define SWS_FAST_BILINEAR     1
00077 #define SWS_BILINEAR          2
00078 #define SWS_BICUBIC           4
00079 #define SWS_X                 8
00080 #define SWS_POINT          0x10
00081 #define SWS_AREA           0x20
00082 #define SWS_BICUBLIN       0x40
00083 #define SWS_GAUSS          0x80
00084 #define SWS_SINC          0x100
00085 #define SWS_LANCZOS       0x200
00086 #define SWS_SPLINE        0x400
00087 
00088 #define SWS_SRC_V_CHR_DROP_MASK     0x30000
00089 #define SWS_SRC_V_CHR_DROP_SHIFT    16
00090 
00091 #define SWS_PARAM_DEFAULT           123456
00092 
00093 #define SWS_PRINT_INFO              0x1000
00094 
00095 //the following 3 flags are not completely implemented
00096 //internal chrominace subsampling info
00097 #define SWS_FULL_CHR_H_INT    0x2000
00098 //input subsampling info
00099 #define SWS_FULL_CHR_H_INP    0x4000
00100 #define SWS_DIRECT_BGR        0x8000
00101 #define SWS_ACCURATE_RND      0x40000
00102 #define SWS_BITEXACT          0x80000
00103 
00104 #if FF_API_SWS_CPU_CAPS
00105 
00109 #define SWS_CPU_CAPS_MMX      0x80000000
00110 #define SWS_CPU_CAPS_MMX2     0x20000000
00111 #define SWS_CPU_CAPS_3DNOW    0x40000000
00112 #define SWS_CPU_CAPS_ALTIVEC  0x10000000
00113 #define SWS_CPU_CAPS_BFIN     0x01000000
00114 #define SWS_CPU_CAPS_SSE2     0x02000000
00115 #endif
00116 
00117 #define SWS_MAX_REDUCE_CUTOFF 0.002
00118 
00119 #define SWS_CS_ITU709         1
00120 #define SWS_CS_FCC            4
00121 #define SWS_CS_ITU601         5
00122 #define SWS_CS_ITU624         5
00123 #define SWS_CS_SMPTE170M      5
00124 #define SWS_CS_SMPTE240M      7
00125 #define SWS_CS_DEFAULT        5
00126 
00134 const int *sws_getCoefficients(int colorspace);
00135 
00136 
00137 // when used for filters they must have an odd number of elements
00138 // coeffs cannot be shared between vectors
00139 typedef struct {
00140     double *coeff;              
00141     int length;                 
00142 } SwsVector;
00143 
00144 // vectors can be shared
00145 typedef struct {
00146     SwsVector *lumH;
00147     SwsVector *lumV;
00148     SwsVector *chrH;
00149     SwsVector *chrV;
00150 } SwsFilter;
00151 
00152 struct SwsContext;
00153 
00158 int sws_isSupportedInput(enum PixelFormat pix_fmt);
00159 
00164 int sws_isSupportedOutput(enum PixelFormat pix_fmt);
00165 
00171 struct SwsContext *sws_alloc_context(void);
00172 
00179 int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter);
00180 
00185 void sws_freeContext(struct SwsContext *swsContext);
00186 
00187 #if FF_API_SWS_GETCONTEXT
00188 
00204 struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
00205                                   int dstW, int dstH, enum PixelFormat dstFormat,
00206                                   int flags, SwsFilter *srcFilter,
00207                                   SwsFilter *dstFilter, const double *param);
00208 #endif
00209 
00236 int sws_scale(struct SwsContext *context, const uint8_t* const srcSlice[], const int srcStride[],
00237               int srcSliceY, int srcSliceH, uint8_t* const dst[], const int dstStride[]);
00238 
00239 #if LIBSWSCALE_VERSION_MAJOR < 1
00240 
00243 int sws_scale_ordered(struct SwsContext *context, const uint8_t* const src[],
00244                       int srcStride[], int srcSliceY, int srcSliceH,
00245                       uint8_t* dst[], int dstStride[]) attribute_deprecated;
00246 #endif
00247 
00252 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
00253                              int srcRange, const int table[4], int dstRange,
00254                              int brightness, int contrast, int saturation);
00255 
00259 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
00260                              int *srcRange, int **table, int *dstRange,
00261                              int *brightness, int *contrast, int *saturation);
00262 
00266 SwsVector *sws_allocVec(int length);
00267 
00272 SwsVector *sws_getGaussianVec(double variance, double quality);
00273 
00278 SwsVector *sws_getConstVec(double c, int length);
00279 
00284 SwsVector *sws_getIdentityVec(void);
00285 
00289 void sws_scaleVec(SwsVector *a, double scalar);
00290 
00294 void sws_normalizeVec(SwsVector *a, double height);
00295 void sws_convVec(SwsVector *a, SwsVector *b);
00296 void sws_addVec(SwsVector *a, SwsVector *b);
00297 void sws_subVec(SwsVector *a, SwsVector *b);
00298 void sws_shiftVec(SwsVector *a, int shift);
00299 
00304 SwsVector *sws_cloneVec(SwsVector *a);
00305 
00306 #if LIBSWSCALE_VERSION_MAJOR < 1
00307 
00310 attribute_deprecated void sws_printVec(SwsVector *a);
00311 #endif
00312 
00317 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
00318 
00319 void sws_freeVec(SwsVector *a);
00320 
00321 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
00322                                 float lumaSharpen, float chromaSharpen,
00323                                 float chromaHShift, float chromaVShift,
00324                                 int verbose);
00325 void sws_freeFilter(SwsFilter *filter);
00326 
00340 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
00341                                         int srcW, int srcH, enum PixelFormat srcFormat,
00342                                         int dstW, int dstH, enum PixelFormat dstFormat,
00343                                         int flags, SwsFilter *srcFilter,
00344                                         SwsFilter *dstFilter, const double *param);
00345 
00356 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette);
00357 
00368 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette);
00369 
00370 
00371 #endif /* SWSCALE_SWSCALE_H */

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