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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 Libav.
00005  *
00006  * Libav 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  * Libav 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 Libav; 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 #include "libavutil/log.h"
00032 #include "libavutil/pixfmt.h"
00033 
00034 #define LIBSWSCALE_VERSION_MAJOR 2
00035 #define LIBSWSCALE_VERSION_MINOR 1
00036 #define LIBSWSCALE_VERSION_MICRO 0
00037 
00038 #define LIBSWSCALE_VERSION_INT  AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
00039                                                LIBSWSCALE_VERSION_MINOR, \
00040                                                LIBSWSCALE_VERSION_MICRO)
00041 #define LIBSWSCALE_VERSION      AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
00042                                            LIBSWSCALE_VERSION_MINOR, \
00043                                            LIBSWSCALE_VERSION_MICRO)
00044 #define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT
00045 
00046 #define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
00047 
00052 #ifndef FF_API_SWS_GETCONTEXT
00053 #define FF_API_SWS_GETCONTEXT  (LIBSWSCALE_VERSION_MAJOR < 3)
00054 #endif
00055 #ifndef FF_API_SWS_CPU_CAPS
00056 #define FF_API_SWS_CPU_CAPS    (LIBSWSCALE_VERSION_MAJOR < 3)
00057 #endif
00058 
00062 unsigned swscale_version(void);
00063 
00067 const char *swscale_configuration(void);
00068 
00072 const char *swscale_license(void);
00073 
00074 /* values for the flags, the stuff on the command line is different */
00075 #define SWS_FAST_BILINEAR     1
00076 #define SWS_BILINEAR          2
00077 #define SWS_BICUBIC           4
00078 #define SWS_X                 8
00079 #define SWS_POINT          0x10
00080 #define SWS_AREA           0x20
00081 #define SWS_BICUBLIN       0x40
00082 #define SWS_GAUSS          0x80
00083 #define SWS_SINC          0x100
00084 #define SWS_LANCZOS       0x200
00085 #define SWS_SPLINE        0x400
00086 
00087 #define SWS_SRC_V_CHR_DROP_MASK     0x30000
00088 #define SWS_SRC_V_CHR_DROP_SHIFT    16
00089 
00090 #define SWS_PARAM_DEFAULT           123456
00091 
00092 #define SWS_PRINT_INFO              0x1000
00093 
00094 //the following 3 flags are not completely implemented
00095 //internal chrominace subsampling info
00096 #define SWS_FULL_CHR_H_INT    0x2000
00097 //input subsampling info
00098 #define SWS_FULL_CHR_H_INP    0x4000
00099 #define SWS_DIRECT_BGR        0x8000
00100 #define SWS_ACCURATE_RND      0x40000
00101 #define SWS_BITEXACT          0x80000
00102 
00103 #if FF_API_SWS_CPU_CAPS
00104 
00108 #define SWS_CPU_CAPS_MMX      0x80000000
00109 #define SWS_CPU_CAPS_MMX2     0x20000000
00110 #define SWS_CPU_CAPS_3DNOW    0x40000000
00111 #define SWS_CPU_CAPS_ALTIVEC  0x10000000
00112 #define SWS_CPU_CAPS_BFIN     0x01000000
00113 #define SWS_CPU_CAPS_SSE2     0x02000000
00114 #endif
00115 
00116 #define SWS_MAX_REDUCE_CUTOFF 0.002
00117 
00118 #define SWS_CS_ITU709         1
00119 #define SWS_CS_FCC            4
00120 #define SWS_CS_ITU601         5
00121 #define SWS_CS_ITU624         5
00122 #define SWS_CS_SMPTE170M      5
00123 #define SWS_CS_SMPTE240M      7
00124 #define SWS_CS_DEFAULT        5
00125 
00133 const int *sws_getCoefficients(int colorspace);
00134 
00135 // when used for filters they must have an odd number of elements
00136 // coeffs cannot be shared between vectors
00137 typedef struct {
00138     double *coeff;              
00139     int length;                 
00140 } SwsVector;
00141 
00142 // vectors can be shared
00143 typedef struct {
00144     SwsVector *lumH;
00145     SwsVector *lumV;
00146     SwsVector *chrH;
00147     SwsVector *chrV;
00148 } SwsFilter;
00149 
00150 struct SwsContext;
00151 
00156 int sws_isSupportedInput(enum PixelFormat pix_fmt);
00157 
00162 int sws_isSupportedOutput(enum PixelFormat pix_fmt);
00163 
00169 struct SwsContext *sws_alloc_context(void);
00170 
00177 int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter);
00178 
00183 void sws_freeContext(struct SwsContext *swsContext);
00184 
00185 #if FF_API_SWS_GETCONTEXT
00186 
00202 struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
00203                                   int dstW, int dstH, enum PixelFormat dstFormat,
00204                                   int flags, SwsFilter *srcFilter,
00205                                   SwsFilter *dstFilter, const double *param);
00206 #endif
00207 
00234 int sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[],
00235               const int srcStride[], int srcSliceY, int srcSliceH,
00236               uint8_t *const dst[], const int dstStride[]);
00237 
00242 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
00243                              int srcRange, const int table[4], int dstRange,
00244                              int brightness, int contrast, int saturation);
00245 
00249 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
00250                              int *srcRange, int **table, int *dstRange,
00251                              int *brightness, int *contrast, int *saturation);
00252 
00256 SwsVector *sws_allocVec(int length);
00257 
00262 SwsVector *sws_getGaussianVec(double variance, double quality);
00263 
00268 SwsVector *sws_getConstVec(double c, int length);
00269 
00274 SwsVector *sws_getIdentityVec(void);
00275 
00279 void sws_scaleVec(SwsVector *a, double scalar);
00280 
00284 void sws_normalizeVec(SwsVector *a, double height);
00285 void sws_convVec(SwsVector *a, SwsVector *b);
00286 void sws_addVec(SwsVector *a, SwsVector *b);
00287 void sws_subVec(SwsVector *a, SwsVector *b);
00288 void sws_shiftVec(SwsVector *a, int shift);
00289 
00294 SwsVector *sws_cloneVec(SwsVector *a);
00295 
00300 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
00301 
00302 void sws_freeVec(SwsVector *a);
00303 
00304 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
00305                                 float lumaSharpen, float chromaSharpen,
00306                                 float chromaHShift, float chromaVShift,
00307                                 int verbose);
00308 void sws_freeFilter(SwsFilter *filter);
00309 
00322 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
00323                                         int srcW, int srcH, enum PixelFormat srcFormat,
00324                                         int dstW, int dstH, enum PixelFormat dstFormat,
00325                                         int flags, SwsFilter *srcFilter,
00326                                         SwsFilter *dstFilter, const double *param);
00327 
00338 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
00339 
00350 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
00351 
00358 const AVClass *sws_get_class(void);
00359 
00360 #endif /* SWSCALE_SWSCALE_H */
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