Initialize correctly optind.
[libav.git] / vhook / null.c
CommitLineData
26b4bb70 1/*
115329f1 2 * Null Video Hook
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3 * Copyright (c) 2002 Philip Gladstone
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
26b4bb70 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21#include <stdio.h>
22
23#include "framehook.h"
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24#include "swscale.h"
25
26static int sws_flags = SWS_BICUBIC;
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27
28typedef struct {
29 int dummy;
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30
31 // This vhook first converts frame to RGB ...
32 struct SwsContext *toRGB_convert_ctx;
33
34 // ... and later converts back frame from RGB to initial format
35 struct SwsContext *fromRGB_convert_ctx;
36
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37} ContextInfo;
38
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39void Release(void *ctx)
40{
41 ContextInfo *ci;
42 ci = (ContextInfo *) ctx;
43
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44 if (ctx) {
45 sws_freeContext(ci->toRGB_convert_ctx);
46 sws_freeContext(ci->fromRGB_convert_ctx);
6c11d48c 47 av_free(ctx);
be484a2c 48 }
6c11d48c 49}
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50
51int Configure(void **ctxp, int argc, char *argv[])
52{
53 fprintf(stderr, "Called with argc=%d\n", argc);
54
55 *ctxp = av_mallocz(sizeof(ContextInfo));
56 return 0;
57}
58
0c1a9eda 59void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
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60{
61 ContextInfo *ci = (ContextInfo *) ctx;
62 char *buf = 0;
63 AVPicture picture1;
64 AVPicture *pict = picture;
65
66 (void) ci;
67
68 if (pix_fmt != PIX_FMT_RGB24) {
69 int size;
70
71 size = avpicture_get_size(PIX_FMT_RGB24, width, height);
72 buf = av_malloc(size);
73
74 avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
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75
76 // if we already got a SWS context, let's realloc if is not re-useable
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77 ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx,
78 width, height, pix_fmt,
79 width, height, PIX_FMT_RGB24,
80 sws_flags, NULL, NULL, NULL);
be484a2c 81 if (ci->toRGB_convert_ctx == NULL) {
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82 av_log(NULL, AV_LOG_ERROR,
83 "Cannot initialize the toRGB conversion context\n");
ca345e44 84 return;
26b4bb70 85 }
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86// img_convert parameters are 2 first destination, then 4 source
87// sws_scale parameters are context, 4 first source, then 2 destination
88 sws_scale(ci->toRGB_convert_ctx,
a8824a79 89 picture->data, picture->linesize, 0, height,
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90 picture1.data, picture1.linesize);
91
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92 pict = &picture1;
93 }
94
95 /* Insert filter code here */
96
97 if (pix_fmt != PIX_FMT_RGB24) {
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98 ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx,
99 width, height, PIX_FMT_RGB24,
100 width, height, pix_fmt,
101 sws_flags, NULL, NULL, NULL);
102 if (ci->fromRGB_convert_ctx == NULL) {
103 av_log(NULL, AV_LOG_ERROR,
104 "Cannot initialize the fromRGB conversion context\n");
ca345e44 105 return;
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106 }
107// img_convert parameters are 2 first destination, then 4 source
108// sws_scale parameters are context, 4 first source, then 2 destination
be484a2c 109 sws_scale(ci->fromRGB_convert_ctx,
a8824a79 110 picture1.data, picture1.linesize, 0, height,
be484a2c 111 picture->data, picture->linesize);
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112 }
113
114 av_free(buf);
115}
116