libswscale/swscale.h

   1 /*
   2     Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  17 */
  18
  19 #ifndef SWSCALE_H
  20 #define SWSCALE_H
  21
  22 /**
  23  * @file swscale.h
  24  * @brief
  25  *     external api for the swscale stuff
  26  */
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  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 completly implemented
  62 //internal chrominace subsamling 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
  74 #define SWS_MAX_REDUCE_CUTOFF 0.002
  75
  76 #define SWS_CS_ITU709           1
  77 #define SWS_CS_FCC              4
  78 #define SWS_CS_ITU601           5
  79 #define SWS_CS_ITU624           5
  80 #define SWS_CS_SMPTE170M        5
  81 #define SWS_CS_SMPTE240M        7
  82 #define SWS_CS_DEFAULT          5
  83
  84
  85
  86 // when used for filters they must have an odd number of elements
  87 // coeffs cannot be shared between vectors
  88 typedef struct {
  89         double *coeff;
  90         int length;
  91 } SwsVector;
  92
  93 // vectors can be shared
  94 typedef struct {
  95         SwsVector *lumH;
  96         SwsVector *lumV;
  97         SwsVector *chrH;
  98         SwsVector *chrV;
  99 } SwsFilter;
 100
 101 struct SwsContext;
 102
 103 void sws_freeContext(struct SwsContext *swsContext);
 104
 105 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
 106                          SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
 107 int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 108                            int srcSliceH, uint8_t* dst[], int dstStride[]);
 109 int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
 110                            int srcSliceH, uint8_t* dst[], int dstStride[]);
 111
 112
 113 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);
 114 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
 115 SwsVector *sws_getGaussianVec(double variance, double quality);
 116 SwsVector *sws_getConstVec(double c, int length);
 117 SwsVector *sws_getIdentityVec(void);
 118 void sws_scaleVec(SwsVector *a, double scalar);
 119 void sws_normalizeVec(SwsVector *a, double height);
 120 void sws_convVec(SwsVector *a, SwsVector *b);
 121 void sws_addVec(SwsVector *a, SwsVector *b);
 122 void sws_subVec(SwsVector *a, SwsVector *b);
 123 void sws_shiftVec(SwsVector *a, int shift);
 124 SwsVector *sws_cloneVec(SwsVector *a);
 125
 126 void sws_printVec(SwsVector *a);
 127 void sws_freeVec(SwsVector *a);
 128
 129 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
 130                                 float lumaSarpen, float chromaSharpen,
 131                                 float chromaHShift, float chromaVShift,
 132                                 int verbose);
 133 void sws_freeFilter(SwsFilter *filter);
 134
 135 #ifdef __cplusplus
 136 }
 137 #endif
 138
 139 #endif