libswscale/swscale.h

   1 /*
   2  * Copyright (C) 2001-2003 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 FFMPEG_SWSCALE_H
  22 #define FFMPEG_SWSCALE_H
  23
  24 /**
  25  * @file swscale.h
  26  * @brief
  27  *     external api for the swscale stuff
  28  */
  29
  30 #include "libavutil/avutil.h"
  31
  32 #define LIBSWSCALE_VERSION_MAJOR 0
  33 #define LIBSWSCALE_VERSION_MINOR 5
  34 #define LIBSWSCALE_VERSION_MICRO 1
  35
  36 #define LIBSWSCALE_VERSION_INT  AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
  37                                                LIBSWSCALE_VERSION_MINOR, \
  38                                                LIBSWSCALE_VERSION_MICRO)
  39 #define LIBSWSCALE_VERSION      AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
  40                                            LIBSWSCALE_VERSION_MINOR, \
  41                                            LIBSWSCALE_VERSION_MICRO)
  42 #define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT
  43
  44 #define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
  45
  46 /* values for the flags, the stuff on the command line is different */
  47 #define SWS_FAST_BILINEAR     1
  48 #define SWS_BILINEAR          2
  49 #define SWS_BICUBIC           4
  50 #define SWS_X                 8
  51 #define SWS_POINT          0x10
  52 #define SWS_AREA           0x20
  53 #define SWS_BICUBLIN       0x40
  54 #define SWS_GAUSS          0x80
  55 #define SWS_SINC          0x100
  56 #define SWS_LANCZOS       0x200
  57 #define SWS_SPLINE        0x400
  58
  59 #define SWS_SRC_V_CHR_DROP_MASK     0x30000
  60 #define SWS_SRC_V_CHR_DROP_SHIFT    16
  61
  62 #define SWS_PARAM_DEFAULT           123456
  63
  64 #define SWS_PRINT_INFO              0x1000
  65
  66 //the following 3 flags are not completely implemented
  67 //internal chrominace subsampling info
  68 #define SWS_FULL_CHR_H_INT    0x2000
  69 //input subsampling info
  70 #define SWS_FULL_CHR_H_INP    0x4000
  71 #define SWS_DIRECT_BGR        0x8000
  72 #define SWS_ACCURATE_RND      0x40000
  73
  74 #define SWS_CPU_CAPS_MMX      0x80000000
  75 #define SWS_CPU_CAPS_MMX2     0x20000000
  76 #define SWS_CPU_CAPS_3DNOW    0x40000000
  77 #define SWS_CPU_CAPS_ALTIVEC  0x10000000
  78 #define SWS_CPU_CAPS_BFIN     0x01000000
  79
  80 #define SWS_MAX_REDUCE_CUTOFF 0.002
  81
  82 #define SWS_CS_ITU709         1
  83 #define SWS_CS_FCC            4
  84 #define SWS_CS_ITU601         5
  85 #define SWS_CS_ITU624         5
  86 #define SWS_CS_SMPTE170M      5
  87 #define SWS_CS_SMPTE240M      7
  88 #define SWS_CS_DEFAULT        5
  89
  90
  91
  92 // when used for filters they must have an odd number of elements
  93 // coeffs cannot be shared between vectors
  94 typedef struct {
  95     double *coeff;
  96     int length;
  97 } SwsVector;
  98
  99 // vectors can be shared
 100 typedef struct {
 101     SwsVector *lumH;
 102     SwsVector *lumV;
 103     SwsVector *chrH;
 104     SwsVector *chrV;
 105 } SwsFilter;
 106
 107 struct SwsContext;
 108
 109 void sws_freeContext(struct SwsContext *swsContext);
 110
 111 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
 112                                   SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
 113 int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 114               int srcSliceH, uint8_t* dst[], int dstStride[]);
 115 int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 116                       int srcSliceH, uint8_t* dst[], int dstStride[]) attribute_deprecated;
 117
 118
 119 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation);
 120 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
 121 SwsVector *sws_getGaussianVec(double variance, double quality);
 122 SwsVector *sws_getConstVec(double c, int length);
 123 SwsVector *sws_getIdentityVec(void);
 124 void sws_scaleVec(SwsVector *a, double scalar);
 125 void sws_normalizeVec(SwsVector *a, double height);
 126 void sws_convVec(SwsVector *a, SwsVector *b);
 127 void sws_addVec(SwsVector *a, SwsVector *b);
 128 void sws_subVec(SwsVector *a, SwsVector *b);
 129 void sws_shiftVec(SwsVector *a, int shift);
 130 SwsVector *sws_cloneVec(SwsVector *a);
 131
 132 void sws_printVec(SwsVector *a);
 133 void sws_freeVec(SwsVector *a);
 134
 135 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
 136                                 float lumaSarpen, float chromaSharpen,
 137                                 float chromaHShift, float chromaVShift,
 138                                 int verbose);
 139 void sws_freeFilter(SwsFilter *filter);
 140
 141 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
 142                                         int srcW, int srcH, int srcFormat,
 143                                         int dstW, int dstH, int dstFormat, int flags,
 144                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
 145
 146 #endif /* FFMPEG_SWSCALE_H */