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 St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef SWSCALE_H
  22 #define 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 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 #define AV_STRINGIFY(s)         AV_TOSTRING(s)
  37 #define AV_TOSTRING(s) #s
  38
  39 #define LIBSWSCALE_VERSION_INT  ((0<<16)+(5<<8)+0)
  40 #define LIBSWSCALE_VERSION      0.5.0
  41 #define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT
  42
  43 #define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
  44
  45 /* values for the flags, the stuff on the command line is different */
  46 #define SWS_FAST_BILINEAR 1
  47 #define SWS_BILINEAR 2
  48 #define SWS_BICUBIC  4
  49 #define SWS_X        8
  50 #define SWS_POINT    0x10
  51 #define SWS_AREA     0x20
  52 #define SWS_BICUBLIN 0x40
  53 #define SWS_GAUSS    0x80
  54 #define SWS_SINC     0x100
  55 #define SWS_LANCZOS  0x200
  56 #define SWS_SPLINE   0x400
  57
  58 #define SWS_SRC_V_CHR_DROP_MASK         0x30000
  59 #define SWS_SRC_V_CHR_DROP_SHIFT        16
  60
  61 #define SWS_PARAM_DEFAULT               123456
  62
  63 #define SWS_PRINT_INFO          0x1000
  64
  65 //the following 3 flags are not completly implemented
  66 //internal chrominace subsamling info
  67 #define SWS_FULL_CHR_H_INT      0x2000
  68 //input subsampling info
  69 #define SWS_FULL_CHR_H_INP      0x4000
  70 #define SWS_DIRECT_BGR          0x8000
  71 #define SWS_ACCURATE_RND        0x40000
  72
  73 #define SWS_CPU_CAPS_MMX   0x80000000
  74 #define SWS_CPU_CAPS_MMX2  0x20000000
  75 #define SWS_CPU_CAPS_3DNOW 0x40000000
  76 #define SWS_CPU_CAPS_ALTIVEC 0x10000000
  77
  78 #define SWS_MAX_REDUCE_CUTOFF 0.002
  79
  80 #define SWS_CS_ITU709           1
  81 #define SWS_CS_FCC              4
  82 #define SWS_CS_ITU601           5
  83 #define SWS_CS_ITU624           5
  84 #define SWS_CS_SMPTE170M        5
  85 #define SWS_CS_SMPTE240M        7
  86 #define SWS_CS_DEFAULT          5
  87
  88
  89
  90 // when used for filters they must have an odd number of elements
  91 // coeffs cannot be shared between vectors
  92 typedef struct {
  93         double *coeff;
  94         int length;
  95 } SwsVector;
  96
  97 // vectors can be shared
  98 typedef struct {
  99         SwsVector *lumH;
 100         SwsVector *lumV;
 101         SwsVector *chrH;
 102         SwsVector *chrV;
 103 } SwsFilter;
 104
 105 struct SwsContext;
 106
 107 void sws_freeContext(struct SwsContext *swsContext);
 108
 109 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
 110                          SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
 111 int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 112                            int srcSliceH, uint8_t* dst[], int dstStride[]);
 113 int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 114                            int srcSliceH, uint8_t* dst[], int dstStride[]) attribute_deprecated;
 115
 116
 117 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);
 118 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
 119 SwsVector *sws_getGaussianVec(double variance, double quality);
 120 SwsVector *sws_getConstVec(double c, int length);
 121 SwsVector *sws_getIdentityVec(void);
 122 void sws_scaleVec(SwsVector *a, double scalar);
 123 void sws_normalizeVec(SwsVector *a, double height);
 124 void sws_convVec(SwsVector *a, SwsVector *b);
 125 void sws_addVec(SwsVector *a, SwsVector *b);
 126 void sws_subVec(SwsVector *a, SwsVector *b);
 127 void sws_shiftVec(SwsVector *a, int shift);
 128 SwsVector *sws_cloneVec(SwsVector *a);
 129
 130 void sws_printVec(SwsVector *a);
 131 void sws_freeVec(SwsVector *a);
 132
 133 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
 134                                 float lumaSarpen, float chromaSharpen,
 135                                 float chromaHShift, float chromaVShift,
 136                                 int verbose);
 137 void sws_freeFilter(SwsFilter *filter);
 138
 139 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
 140                 int srcW, int srcH, int srcFormat,
 141                 int dstW, int dstH, int dstFormat, int flags,
 142                 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
 143
 144 #ifdef __cplusplus
 145 }
 146 #endif
 147
 148 #endif