Implement sws_getCachedContext() in swscale emulation
[libav.git] / libavcodec / swscale.h
1 /*
2 * copyright (C) 2006 Luca Abeni
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 Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef SWSCALE_EMU_H
22 #define SWSCALE_EMU_H
23
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27
28 /* Dummy, only useful for compilation! */
29 #define SWS_FAST_BILINEAR 1
30 #define SWS_BILINEAR 2
31 #define SWS_BICUBIC 4
32 #define SWS_X 8
33 #define SWS_POINT 0x10
34 #define SWS_AREA 0x20
35 #define SWS_BICUBLIN 0x40
36 #define SWS_GAUSS 0x80
37 #define SWS_SINC 0x100
38 #define SWS_LANCZOS 0x200
39 #define SWS_SPLINE 0x400
40
41 #define SwsFilter void
42 struct SwsContext {
43 struct ImgReSampleContext *resampling_ctx;
44 enum PixelFormat src_pix_fmt, dst_pix_fmt;
45 };
46
47 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat,
48 int dstW, int dstH, int dstFormat,
49 int flags, SwsFilter *srcFilter,
50 SwsFilter *dstFilter, double *param);
51
52 int sws_scale(struct SwsContext *ctx, uint8_t* src[], int srcStride[],
53 int srcSliceY, int srcSliceH, uint8_t* dst[], int dstStride[]);
54
55 void sws_freeContext(struct SwsContext *swsContext);
56
57 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
58 int srcW, int srcH, int srcFormat,
59 int dstW, int dstH, int dstFormat, int flags,
60 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
61
62 #ifdef __cplusplus
63 }
64 #endif
65
66 #endif /* SWSCALE_EMU_H */