3bcb432430cecceaabf0e83c300d5f3c1ee695f6
[libav.git] / postproc / 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 /* values for the flags, the stuff on the command line is different */
33 #define SWS_FAST_BILINEAR 1
34 #define SWS_BILINEAR 2
35 #define SWS_BICUBIC 4
36 #define SWS_X 8
37 #define SWS_POINT 0x10
38 #define SWS_AREA 0x20
39 #define SWS_BICUBLIN 0x40
40 #define SWS_GAUSS 0x80
41 #define SWS_SINC 0x100
42 #define SWS_LANCZOS 0x200
43 #define SWS_SPLINE 0x400
44
45 #define SWS_SRC_V_CHR_DROP_MASK 0x30000
46 #define SWS_SRC_V_CHR_DROP_SHIFT 16
47
48 #define SWS_PARAM_MASK 0x3FC0000
49 #define SWS_PARAM_SHIFT 18
50
51 #define SWS_PRINT_INFO 0x1000
52
53 //the following 3 flags are not completly implemented
54 //internal chrominace subsamling info
55 #define SWS_FULL_CHR_H_INT 0x2000
56 //input subsampling info
57 #define SWS_FULL_CHR_H_INP 0x4000
58 #define SWS_DIRECT_BGR 0x8000
59
60 #define SWS_CPU_CAPS_MMX 0x80000000
61 #define SWS_CPU_CAPS_MMX2 0x20000000
62 #define SWS_CPU_CAPS_3DNOW 0x40000000
63 #define SWS_CPU_CAPS_ALTIVEC 0x10000000
64
65 #define SWS_MAX_REDUCE_CUTOFF 0.002
66
67 #define SWS_CS_ITU709 1
68 #define SWS_CS_FCC 4
69 #define SWS_CS_ITU601 5
70 #define SWS_CS_ITU624 5
71 #define SWS_CS_SMPTE170M 5
72 #define SWS_CS_SMPTE240M 7
73 #define SWS_CS_DEFAULT 5
74
75
76
77 // when used for filters they must have an odd number of elements
78 // coeffs cannot be shared between vectors
79 typedef struct {
80 double *coeff;
81 int length;
82 } SwsVector;
83
84 // vectors can be shared
85 typedef struct {
86 SwsVector *lumH;
87 SwsVector *lumV;
88 SwsVector *chrH;
89 SwsVector *chrV;
90 } SwsFilter;
91
92 struct SwsContext;
93
94 void sws_freeContext(struct SwsContext *swsContext);
95
96 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
97 SwsFilter *srcFilter, SwsFilter *dstFilter);
98 int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
99 int srcSliceH, uint8_t* dst[], int dstStride[]);
100 int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
101 int srcSliceH, uint8_t* dst[], int dstStride[]);
102
103
104 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);
105 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
106 SwsVector *sws_getGaussianVec(double variance, double quality);
107 SwsVector *sws_getConstVec(double c, int length);
108 SwsVector *sws_getIdentityVec(void);
109 void sws_scaleVec(SwsVector *a, double scalar);
110 void sws_normalizeVec(SwsVector *a, double height);
111 void sws_convVec(SwsVector *a, SwsVector *b);
112 void sws_addVec(SwsVector *a, SwsVector *b);
113 void sws_subVec(SwsVector *a, SwsVector *b);
114 void sws_shiftVec(SwsVector *a, int shift);
115 SwsVector *sws_cloneVec(SwsVector *a);
116
117 void sws_printVec(SwsVector *a);
118 void sws_freeVec(SwsVector *a);
119
120 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
121 float lumaSarpen, float chromaSharpen,
122 float chromaHShift, float chromaVShift,
123 int verbose);
124 void sws_freeFilter(SwsFilter *filter);
125
126 #ifdef __cplusplus
127 }
128 #endif
129
130 #endif