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libswscale/swscale.h

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00001 /*
00002  * Copyright (C) 2001-2011 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 #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 100
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 #ifndef FF_API_SWS_FORMAT_NAME
00059 #define FF_API_SWS_FORMAT_NAME  (LIBSWSCALE_VERSION_MAJOR < 3)
00060 #endif
00061 
00065 unsigned swscale_version(void);
00066 
00070 const char *swscale_configuration(void);
00071 
00075 const char *swscale_license(void);
00076 
00077 /* values for the flags, the stuff on the command line is different */
00078 #define SWS_FAST_BILINEAR     1
00079 #define SWS_BILINEAR          2
00080 #define SWS_BICUBIC           4
00081 #define SWS_X                 8
00082 #define SWS_POINT          0x10
00083 #define SWS_AREA           0x20
00084 #define SWS_BICUBLIN       0x40
00085 #define SWS_GAUSS          0x80
00086 #define SWS_SINC          0x100
00087 #define SWS_LANCZOS       0x200
00088 #define SWS_SPLINE        0x400
00089 
00090 #define SWS_SRC_V_CHR_DROP_MASK     0x30000
00091 #define SWS_SRC_V_CHR_DROP_SHIFT    16
00092 
00093 #define SWS_PARAM_DEFAULT           123456
00094 
00095 #define SWS_PRINT_INFO              0x1000
00096 
00097 //the following 3 flags are not completely implemented
00098 //internal chrominace subsampling info
00099 #define SWS_FULL_CHR_H_INT    0x2000
00100 //input subsampling info
00101 #define SWS_FULL_CHR_H_INP    0x4000
00102 #define SWS_DIRECT_BGR        0x8000
00103 #define SWS_ACCURATE_RND      0x40000
00104 #define SWS_BITEXACT          0x80000
00105 
00106 #if FF_API_SWS_CPU_CAPS
00107 
00111 #define SWS_CPU_CAPS_MMX      0x80000000
00112 #define SWS_CPU_CAPS_MMX2     0x20000000
00113 #define SWS_CPU_CAPS_3DNOW    0x40000000
00114 #define SWS_CPU_CAPS_ALTIVEC  0x10000000
00115 #define SWS_CPU_CAPS_BFIN     0x01000000
00116 #define SWS_CPU_CAPS_SSE2     0x02000000
00117 #endif
00118 
00119 #define SWS_MAX_REDUCE_CUTOFF 0.002
00120 
00121 #define SWS_CS_ITU709         1
00122 #define SWS_CS_FCC            4
00123 #define SWS_CS_ITU601         5
00124 #define SWS_CS_ITU624         5
00125 #define SWS_CS_SMPTE170M      5
00126 #define SWS_CS_SMPTE240M      7
00127 #define SWS_CS_DEFAULT        5
00128 
00136 const int *sws_getCoefficients(int colorspace);
00137 
00138 // when used for filters they must have an odd number of elements
00139 // coeffs cannot be shared between vectors
00140 typedef struct {
00141     double *coeff;              
00142     int length;                 
00143 } SwsVector;
00144 
00145 // vectors can be shared
00146 typedef struct {
00147     SwsVector *lumH;
00148     SwsVector *lumV;
00149     SwsVector *chrH;
00150     SwsVector *chrV;
00151 } SwsFilter;
00152 
00153 struct SwsContext;
00154 
00159 int sws_isSupportedInput(enum PixelFormat pix_fmt);
00160 
00165 int sws_isSupportedOutput(enum PixelFormat pix_fmt);
00166 
00172 struct SwsContext *sws_alloc_context(void);
00173 
00180 int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter);
00181 
00186 void sws_freeContext(struct SwsContext *swsContext);
00187 
00188 #if FF_API_SWS_GETCONTEXT
00189 
00205 struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
00206                                   int dstW, int dstH, enum PixelFormat dstFormat,
00207                                   int flags, SwsFilter *srcFilter,
00208                                   SwsFilter *dstFilter, const double *param);
00209 #endif
00210 
00237 int sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[],
00238               const int srcStride[], int srcSliceY, int srcSliceH,
00239               uint8_t *const dst[], const int dstStride[]);
00240 
00245 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
00246                              int srcRange, const int table[4], int dstRange,
00247                              int brightness, int contrast, int saturation);
00248 
00252 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
00253                              int *srcRange, int **table, int *dstRange,
00254                              int *brightness, int *contrast, int *saturation);
00255 
00259 SwsVector *sws_allocVec(int length);
00260 
00265 SwsVector *sws_getGaussianVec(double variance, double quality);
00266 
00271 SwsVector *sws_getConstVec(double c, int length);
00272 
00277 SwsVector *sws_getIdentityVec(void);
00278 
00282 void sws_scaleVec(SwsVector *a, double scalar);
00283 
00287 void sws_normalizeVec(SwsVector *a, double height);
00288 void sws_convVec(SwsVector *a, SwsVector *b);
00289 void sws_addVec(SwsVector *a, SwsVector *b);
00290 void sws_subVec(SwsVector *a, SwsVector *b);
00291 void sws_shiftVec(SwsVector *a, int shift);
00292 
00297 SwsVector *sws_cloneVec(SwsVector *a);
00298 
00303 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
00304 
00305 void sws_freeVec(SwsVector *a);
00306 
00307 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
00308                                 float lumaSharpen, float chromaSharpen,
00309                                 float chromaHShift, float chromaVShift,
00310                                 int verbose);
00311 void sws_freeFilter(SwsFilter *filter);
00312 
00325 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
00326                                         int srcW, int srcH, enum PixelFormat srcFormat,
00327                                         int dstW, int dstH, enum PixelFormat dstFormat,
00328                                         int flags, SwsFilter *srcFilter,
00329                                         SwsFilter *dstFilter, const double *param);
00330 
00341 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
00342 
00353 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette);
00354 
00361 const AVClass *sws_get_class(void);
00362 
00363 #endif /* SWSCALE_SWSCALE_H */
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