2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
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.
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.
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
27 * external api for the swscale stuff
34 #define AV_STRINGIFY(s) AV_TOSTRING(s)
35 #define AV_TOSTRING(s) #s
37 #define LIBSWSCALE_VERSION_INT ((0<<16)+(5<<8)+0)
38 #define LIBSWSCALE_VERSION 0.5.0
39 #define LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT
41 #define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
43 /* values for the flags, the stuff on the command line is different */
44 #define SWS_FAST_BILINEAR 1
45 #define SWS_BILINEAR 2
48 #define SWS_POINT 0x10
50 #define SWS_BICUBLIN 0x40
51 #define SWS_GAUSS 0x80
52 #define SWS_SINC 0x100
53 #define SWS_LANCZOS 0x200
54 #define SWS_SPLINE 0x400
56 #define SWS_SRC_V_CHR_DROP_MASK 0x30000
57 #define SWS_SRC_V_CHR_DROP_SHIFT 16
59 #define SWS_PARAM_DEFAULT 123456
61 #define SWS_PRINT_INFO 0x1000
63 //the following 3 flags are not completly implemented
64 //internal chrominace subsamling info
65 #define SWS_FULL_CHR_H_INT 0x2000
66 //input subsampling info
67 #define SWS_FULL_CHR_H_INP 0x4000
68 #define SWS_DIRECT_BGR 0x8000
69 #define SWS_ACCURATE_RND 0x40000
71 #define SWS_CPU_CAPS_MMX 0x80000000
72 #define SWS_CPU_CAPS_MMX2 0x20000000
73 #define SWS_CPU_CAPS_3DNOW 0x40000000
74 #define SWS_CPU_CAPS_ALTIVEC 0x10000000
76 #define SWS_MAX_REDUCE_CUTOFF 0.002
78 #define SWS_CS_ITU709 1
80 #define SWS_CS_ITU601 5
81 #define SWS_CS_ITU624 5
82 #define SWS_CS_SMPTE170M 5
83 #define SWS_CS_SMPTE240M 7
84 #define SWS_CS_DEFAULT 5
88 // when used for filters they must have an odd number of elements
89 // coeffs cannot be shared between vectors
95 // vectors can be shared
105 void sws_freeContext(struct SwsContext *swsContext);
107 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
108 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
109 int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
110 int srcSliceH, uint8_t* dst[], int dstStride[]);
111 int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
112 int srcSliceH, uint8_t* dst[], int dstStride[]);
115 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);
116 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
117 SwsVector *sws_getGaussianVec(double variance, double quality);
118 SwsVector *sws_getConstVec(double c, int length);
119 SwsVector *sws_getIdentityVec(void);
120 void sws_scaleVec(SwsVector *a, double scalar);
121 void sws_normalizeVec(SwsVector *a, double height);
122 void sws_convVec(SwsVector *a, SwsVector *b);
123 void sws_addVec(SwsVector *a, SwsVector *b);
124 void sws_subVec(SwsVector *a, SwsVector *b);
125 void sws_shiftVec(SwsVector *a, int shift);
126 SwsVector *sws_cloneVec(SwsVector *a);
128 void sws_printVec(SwsVector *a);
129 void sws_freeVec(SwsVector *a);
131 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
132 float lumaSarpen, float chromaSharpen,
133 float chromaHShift, float chromaVShift,
135 void sws_freeFilter(SwsFilter *filter);
137 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
138 int srcW, int srcH, int srcFormat,
139 int dstW, int dstH, int dstFormat, int flags,
140 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);