use new metadata API in ogg/vorbis demuxer
[libav.git] / libswscale / swscale.h
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fe8054c0 1/*
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2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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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.
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10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
d026b45e 15 *
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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
b19bcbaa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d026b45e 19 */
3db822b0 20
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21#ifndef SWSCALE_SWSCALE_H
22#define SWSCALE_SWSCALE_H
5427e242 23
d4e24275 24/**
82aaa790 25 * @file libswscale/swscale.h
6a4970ab 26 * @brief
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27 * external api for the swscale stuff
28 */
29
88517699 30#include "libavutil/avutil.h"
d28ef270 31
e08e6bb6 32#define LIBSWSCALE_VERSION_MAJOR 0
b3e03fa7 33#define LIBSWSCALE_VERSION_MINOR 6
8055ede6 34#define LIBSWSCALE_VERSION_MICRO 1
ccf95ef1 35
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36#define LIBSWSCALE_VERSION_INT AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
37 LIBSWSCALE_VERSION_MINOR, \
38 LIBSWSCALE_VERSION_MICRO)
39#define LIBSWSCALE_VERSION AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
40 LIBSWSCALE_VERSION_MINOR, \
41 LIBSWSCALE_VERSION_MICRO)
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42#define LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT
43
44#define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
45
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46/**
47 * Returns the LIBSWSCALE_VERSION_INT constant.
48 */
49unsigned swscale_version(void);
50
28bf81c9 51/* values for the flags, the stuff on the command line is different */
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52#define SWS_FAST_BILINEAR 1
53#define SWS_BILINEAR 2
54#define SWS_BICUBIC 4
55#define SWS_X 8
56#define SWS_POINT 0x10
57#define SWS_AREA 0x20
58#define SWS_BICUBLIN 0x40
59#define SWS_GAUSS 0x80
60#define SWS_SINC 0x100
61#define SWS_LANCZOS 0x200
62#define SWS_SPLINE 0x400
1e621b18 63
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64#define SWS_SRC_V_CHR_DROP_MASK 0x30000
65#define SWS_SRC_V_CHR_DROP_SHIFT 16
5859233b 66
221b804f 67#define SWS_PARAM_DEFAULT 123456
a86c461c 68
221b804f 69#define SWS_PRINT_INFO 0x1000
a86c461c 70
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71//the following 3 flags are not completely implemented
72//internal chrominace subsampling info
221b804f 73#define SWS_FULL_CHR_H_INT 0x2000
1e621b18 74//input subsampling info
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75#define SWS_FULL_CHR_H_INP 0x4000
76#define SWS_DIRECT_BGR 0x8000
77#define SWS_ACCURATE_RND 0x40000
ceb700ba 78#define SWS_BITEXACT 0x80000
1e621b18 79
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80#define SWS_CPU_CAPS_MMX 0x80000000
81#define SWS_CPU_CAPS_MMX2 0x20000000
82#define SWS_CPU_CAPS_3DNOW 0x40000000
83#define SWS_CPU_CAPS_ALTIVEC 0x10000000
d3f3eea9 84#define SWS_CPU_CAPS_BFIN 0x01000000
516b1f82 85
c7f822d9 86#define SWS_MAX_REDUCE_CUTOFF 0.002
28bf81c9 87
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88#define SWS_CS_ITU709 1
89#define SWS_CS_FCC 4
90#define SWS_CS_ITU601 5
91#define SWS_CS_ITU624 5
92#define SWS_CS_SMPTE170M 5
93#define SWS_CS_SMPTE240M 7
94#define SWS_CS_DEFAULT 5
0481412a 95
77a49659 96
28bf81c9 97
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98// when used for filters they must have an odd number of elements
99// coeffs cannot be shared between vectors
28bf81c9 100typedef struct {
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101 double *coeff; ///< pointer to the list of coefficients
102 int length; ///< number of coefficients in the vector
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103} SwsVector;
104
105// vectors can be shared
106typedef struct {
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107 SwsVector *lumH;
108 SwsVector *lumV;
109 SwsVector *chrH;
110 SwsVector *chrV;
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111} SwsFilter;
112
d4e24275 113struct SwsContext;
077ea8a7 114
d4e24275 115void sws_freeContext(struct SwsContext *swsContext);
28bf81c9 116
96b27045 117struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int dstW, int dstH, enum PixelFormat dstFormat, int flags,
221b804f 118 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
d4e24275 119int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
221b804f 120 int srcSliceH, uint8_t* dst[], int dstStride[]);
c099766f 121#if LIBSWSCALE_VERSION_MAJOR < 1
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122/**
123 * @deprecated Use sws_scale() instead.
124 */
fccb9b2b 125int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
221b804f 126 int srcSliceH, uint8_t* dst[], int dstStride[]) attribute_deprecated;
c099766f 127#endif
d4e24275 128
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129
130int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation);
131int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
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132
133/**
134 * Returns a normalized Gaussian curve used to filter stuff
135 * quality=3 is high quality, lower is lower quality.
136 */
d4e24275 137SwsVector *sws_getGaussianVec(double variance, double quality);
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138
139/**
70838eef 140 * Allocates and returns a vector with \p length coefficients, all
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141 * with the same value \p c.
142 */
d4e24275 143SwsVector *sws_getConstVec(double c, int length);
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144
145/**
146 * Allocates and returns a vector with just one coefficient, with
147 * value 1.0.
148 */
d4e24275 149SwsVector *sws_getIdentityVec(void);
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150
151/**
152 * Scales all the coefficients of \p a by the \p scalar value.
153 */
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154void sws_scaleVec(SwsVector *a, double scalar);
155void sws_normalizeVec(SwsVector *a, double height);
156void sws_convVec(SwsVector *a, SwsVector *b);
157void sws_addVec(SwsVector *a, SwsVector *b);
158void sws_subVec(SwsVector *a, SwsVector *b);
159void sws_shiftVec(SwsVector *a, int shift);
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160
161/**
162 * Allocates and returns a clone of the vector \p a, that is a vector
163 * with the same coefficients as \p a.
164 */
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165SwsVector *sws_cloneVec(SwsVector *a);
166
167void sws_printVec(SwsVector *a);
168void sws_freeVec(SwsVector *a);
169
6a4970ab 170SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
b534f73d 171 float lumaSharpen, float chromaSharpen,
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172 float chromaHShift, float chromaVShift,
173 int verbose);
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174void sws_freeFilter(SwsFilter *filter);
175
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176/**
177 * Checks if context is valid or reallocs a new one instead.
178 * If context is NULL, just calls sws_getContext() to get a new one.
179 * Otherwise, checks if the parameters are the ones already saved in context.
180 * If that is the case, returns the current context.
181 * Otherwise, frees context and gets a new one.
182 *
183 * Be warned that srcFilter, dstFilter are not checked, they are
184 * asumed to remain valid.
185 */
22e46959 186struct SwsContext *sws_getCachedContext(struct SwsContext *context,
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187 int srcW, int srcH, enum PixelFormat srcFormat,
188 int dstW, int dstH, enum PixelFormat dstFormat, int flags,
221b804f 189 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
22e46959 190
0eaf5235 191#endif /* SWSCALE_SWSCALE_H */