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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 11
00034 #define LIBSWSCALE_VERSION_MICRO 0
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 
00049 unsigned swscale_version(void);
00050 
00054 const char *swscale_configuration(void);
00055 
00059 const char *swscale_license(void);
00060 
00061 /* values for the flags, the stuff on the command line is different */
00062 #define SWS_FAST_BILINEAR     1
00063 #define SWS_BILINEAR          2
00064 #define SWS_BICUBIC           4
00065 #define SWS_X                 8
00066 #define SWS_POINT          0x10
00067 #define SWS_AREA           0x20
00068 #define SWS_BICUBLIN       0x40
00069 #define SWS_GAUSS          0x80
00070 #define SWS_SINC          0x100
00071 #define SWS_LANCZOS       0x200
00072 #define SWS_SPLINE        0x400
00073 
00074 #define SWS_SRC_V_CHR_DROP_MASK     0x30000
00075 #define SWS_SRC_V_CHR_DROP_SHIFT    16
00076 
00077 #define SWS_PARAM_DEFAULT           123456
00078 
00079 #define SWS_PRINT_INFO              0x1000
00080 
00081 //the following 3 flags are not completely implemented
00082 //internal chrominace subsampling info
00083 #define SWS_FULL_CHR_H_INT    0x2000
00084 //input subsampling info
00085 #define SWS_FULL_CHR_H_INP    0x4000
00086 #define SWS_DIRECT_BGR        0x8000
00087 #define SWS_ACCURATE_RND      0x40000
00088 #define SWS_BITEXACT          0x80000
00089 
00090 #define SWS_CPU_CAPS_MMX      0x80000000
00091 #define SWS_CPU_CAPS_MMX2     0x20000000
00092 #define SWS_CPU_CAPS_3DNOW    0x40000000
00093 #define SWS_CPU_CAPS_ALTIVEC  0x10000000
00094 #define SWS_CPU_CAPS_BFIN     0x01000000
00095 
00096 #define SWS_MAX_REDUCE_CUTOFF 0.002
00097 
00098 #define SWS_CS_ITU709         1
00099 #define SWS_CS_FCC            4
00100 #define SWS_CS_ITU601         5
00101 #define SWS_CS_ITU624         5
00102 #define SWS_CS_SMPTE170M      5
00103 #define SWS_CS_SMPTE240M      7
00104 #define SWS_CS_DEFAULT        5
00105 
00113 const int *sws_getCoefficients(int colorspace);
00114 
00115 
00116 // when used for filters they must have an odd number of elements
00117 // coeffs cannot be shared between vectors
00118 typedef struct {
00119     double *coeff;              
00120     int length;                 
00121 } SwsVector;
00122 
00123 // vectors can be shared
00124 typedef struct {
00125     SwsVector *lumH;
00126     SwsVector *lumV;
00127     SwsVector *chrH;
00128     SwsVector *chrV;
00129 } SwsFilter;
00130 
00131 struct SwsContext;
00132 
00137 int sws_isSupportedInput(enum PixelFormat pix_fmt);
00138 
00143 int sws_isSupportedOutput(enum PixelFormat pix_fmt);
00144 
00149 void sws_freeContext(struct SwsContext *swsContext);
00150 
00164 struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
00165                                   int dstW, int dstH, enum PixelFormat dstFormat,
00166                                   int flags, SwsFilter *srcFilter,
00167                                   SwsFilter *dstFilter, const double *param);
00168 
00195 int sws_scale(struct SwsContext *context, const uint8_t* const srcSlice[], const int srcStride[],
00196               int srcSliceY, int srcSliceH, uint8_t* const dst[], const int dstStride[]);
00197 #if LIBSWSCALE_VERSION_MAJOR < 1
00198 
00201 int sws_scale_ordered(struct SwsContext *context, const uint8_t* const src[],
00202                       int srcStride[], int srcSliceY, int srcSliceH,
00203                       uint8_t* dst[], int dstStride[]) attribute_deprecated;
00204 #endif
00205 
00211 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
00212                              int srcRange, const int table[4], int dstRange,
00213                              int brightness, int contrast, int saturation);
00214 
00218 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
00219                              int *srcRange, int **table, int *dstRange,
00220                              int *brightness, int *contrast, int *saturation);
00221 
00225 SwsVector *sws_allocVec(int length);
00226 
00231 SwsVector *sws_getGaussianVec(double variance, double quality);
00232 
00237 SwsVector *sws_getConstVec(double c, int length);
00238 
00243 SwsVector *sws_getIdentityVec(void);
00244 
00248 void sws_scaleVec(SwsVector *a, double scalar);
00249 
00253 void sws_normalizeVec(SwsVector *a, double height);
00254 void sws_convVec(SwsVector *a, SwsVector *b);
00255 void sws_addVec(SwsVector *a, SwsVector *b);
00256 void sws_subVec(SwsVector *a, SwsVector *b);
00257 void sws_shiftVec(SwsVector *a, int shift);
00258 
00263 SwsVector *sws_cloneVec(SwsVector *a);
00264 
00265 #if LIBSWSCALE_VERSION_MAJOR < 1
00266 
00269 attribute_deprecated void sws_printVec(SwsVector *a);
00270 #endif
00271 
00276 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
00277 
00278 void sws_freeVec(SwsVector *a);
00279 
00280 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
00281                                 float lumaSharpen, float chromaSharpen,
00282                                 float chromaHShift, float chromaVShift,
00283                                 int verbose);
00284 void sws_freeFilter(SwsFilter *filter);
00285 
00299 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
00300                                         int srcW, int srcH, enum PixelFormat srcFormat,
00301                                         int dstW, int dstH, enum PixelFormat dstFormat,
00302                                         int flags, SwsFilter *srcFilter,
00303                                         SwsFilter *dstFilter, const double *param);
00304 
00315 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette);
00316 
00327 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette);
00328 
00329 
00330 #endif /* SWSCALE_SWSCALE_H */

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