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 "avutil.h"
  31
  32 #define AV_STRINGIFY(s)         AV_TOSTRING(s)
  33 #define AV_TOSTRING(s) #s
  34
  35 #define LIBSWSCALE_VERSION_INT  ((0<<16)+(5<<8)+0)
  36 #define LIBSWSCALE_VERSION      0.5.0
  37 #define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT
  38
  39 #define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
  40
  41 /* values for the flags, the stuff on the command line is different */
  42 #define SWS_FAST_BILINEAR     1
  43 #define SWS_BILINEAR          2
  44 #define SWS_BICUBIC           4
  45 #define SWS_X                 8
  46 #define SWS_POINT          0x10
  47 #define SWS_AREA           0x20
  48 #define SWS_BICUBLIN       0x40
  49 #define SWS_GAUSS          0x80
  50 #define SWS_SINC          0x100
  51 #define SWS_LANCZOS       0x200
  52 #define SWS_SPLINE        0x400
  53
  54 #define SWS_SRC_V_CHR_DROP_MASK     0x30000
  55 #define SWS_SRC_V_CHR_DROP_SHIFT    16
  56
  57 #define SWS_PARAM_DEFAULT           123456
  58
  59 #define SWS_PRINT_INFO              0x1000
  60
  61 //the following 3 flags are not completely implemented
  62 //internal chrominace subsampling info
  63 #define SWS_FULL_CHR_H_INT    0x2000
  64 //input subsampling info
  65 #define SWS_FULL_CHR_H_INP    0x4000
  66 #define SWS_DIRECT_BGR        0x8000
  67 #define SWS_ACCURATE_RND      0x40000
  68
  69 #define SWS_CPU_CAPS_MMX      0x80000000
  70 #define SWS_CPU_CAPS_MMX2     0x20000000
  71 #define SWS_CPU_CAPS_3DNOW    0x40000000
  72 #define SWS_CPU_CAPS_ALTIVEC  0x10000000
  73 #define SWS_CPU_CAPS_BFIN     0x01000000
  74
  75 #define SWS_MAX_REDUCE_CUTOFF 0.002
  76
  77 #define SWS_CS_ITU709         1
  78 #define SWS_CS_FCC            4
  79 #define SWS_CS_ITU601         5
  80 #define SWS_CS_ITU624         5
  81 #define SWS_CS_SMPTE170M      5
  82 #define SWS_CS_SMPTE240M      7
  83 #define SWS_CS_DEFAULT        5
  84
  85
  86
  87 // when used for filters they must have an odd number of elements
  88 // coeffs cannot be shared between vectors
  89 typedef struct {
  90     double *coeff;
  91     int length;
  92 } SwsVector;
  93
  94 // vectors can be shared
  95 typedef struct {
  96     SwsVector *lumH;
  97     SwsVector *lumV;
  98     SwsVector *chrH;
  99     SwsVector *chrV;
 100 } SwsFilter;
 101
 102 struct SwsContext;
 103
 104 void sws_freeContext(struct SwsContext *swsContext);
 105
 106 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
 107                                   SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
 108 int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 109               int srcSliceH, uint8_t* dst[], int dstStride[]);
 110 int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 111                       int srcSliceH, uint8_t* dst[], int dstStride[]) attribute_deprecated;
 112
 113
 114 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);
 115 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
 116 SwsVector *sws_getGaussianVec(double variance, double quality);
 117 SwsVector *sws_getConstVec(double c, int length);
 118 SwsVector *sws_getIdentityVec(void);
 119 void sws_scaleVec(SwsVector *a, double scalar);
 120 void sws_normalizeVec(SwsVector *a, double height);
 121 void sws_convVec(SwsVector *a, SwsVector *b);
 122 void sws_addVec(SwsVector *a, SwsVector *b);
 123 void sws_subVec(SwsVector *a, SwsVector *b);
 124 void sws_shiftVec(SwsVector *a, int shift);
 125 SwsVector *sws_cloneVec(SwsVector *a);
 126
 127 void sws_printVec(SwsVector *a);
 128 void sws_freeVec(SwsVector *a);
 129
 130 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
 131                                 float lumaSarpen, float chromaSharpen,
 132                                 float chromaHShift, float chromaVShift,
 133                                 int verbose);
 134 void sws_freeFilter(SwsFilter *filter);
 135
 136 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
 137                                         int srcW, int srcH, int srcFormat,
 138                                         int dstW, int dstH, int dstFormat, int flags,
 139                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
 140
 141 #endif /* FFMPEG_SWSCALE_H */