swscale: Fix an undefined behaviour
[libav.git] / libswscale / colorspace-test.c
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a28ea2c0 1/*
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2 * Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
3 *
2912e87a 4 * This file is part of Libav.
d026b45e 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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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.
d026b45e 10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
d026b45e 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 *
54e3ae2e 16 * You should have received a copy of the GNU Lesser General Public
2912e87a 17 * License along with Libav; if not, write to the Free Software
b19bcbaa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d026b45e 19 */
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20
21#include <stdio.h>
7f3f497a 22#include <string.h> /* for memset() */
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23#include <stdlib.h>
24#include <inttypes.h>
25
b76ee469 26#include "swscale.h"
a28ea2c0 27#include "rgb2rgb.h"
1d9c2dc8 28#include "libavutil/mem.h"
a28ea2c0 29
999484c9 30#define SIZE 1000
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31#define srcByte 0x55
32#define dstByte 0xBB
33
999484c9 34#define FUNC(s, d, n) { s, d, #n, n }
a31de956 35
2e3fb9e3 36int main(void)
a28ea2c0 37{
3a74415d 38 int i, funcNum;
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39 uint8_t *srcBuffer = av_malloc(SIZE);
40 uint8_t *dstBuffer = av_malloc(SIZE);
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41 int failedNum = 0;
42 int passedNum = 0;
6a4970ab 43
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44 if (!srcBuffer || !dstBuffer)
45 return -1;
46
3a74415d 47 av_log(NULL, AV_LOG_INFO, "memory corruption test ...\n");
e66149e7 48 sws_rgb2rgb_init();
6a4970ab 49
999484c9 50 for (funcNum = 0; ; funcNum++) {
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51 struct func_info_s {
52 int src_bpp;
53 int dst_bpp;
dcc37c9b 54 const char *name;
b8e89339 55 void (*func)(const uint8_t *src, uint8_t *dst, int src_size);
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56 } func_info[] = {
57 FUNC(2, 2, rgb15to16),
58 FUNC(2, 3, rgb15to24),
59 FUNC(2, 4, rgb15to32),
60 FUNC(2, 3, rgb16to24),
61 FUNC(2, 4, rgb16to32),
62 FUNC(3, 2, rgb24to15),
63 FUNC(3, 2, rgb24to16),
64 FUNC(3, 4, rgb24to32),
65 FUNC(4, 2, rgb32to15),
66 FUNC(4, 2, rgb32to16),
67 FUNC(4, 3, rgb32to24),
68 FUNC(2, 2, rgb16to15),
69 FUNC(2, 2, rgb15tobgr15),
70 FUNC(2, 2, rgb15tobgr16),
71 FUNC(2, 3, rgb15tobgr24),
72 FUNC(2, 4, rgb15tobgr32),
73 FUNC(2, 2, rgb16tobgr15),
74 FUNC(2, 2, rgb16tobgr16),
75 FUNC(2, 3, rgb16tobgr24),
76 FUNC(2, 4, rgb16tobgr32),
77 FUNC(3, 2, rgb24tobgr15),
78 FUNC(3, 2, rgb24tobgr16),
79 FUNC(3, 3, rgb24tobgr24),
80 FUNC(3, 4, rgb24tobgr32),
81 FUNC(4, 2, rgb32tobgr15),
82 FUNC(4, 2, rgb32tobgr16),
83 FUNC(4, 3, rgb32tobgr24),
b494baf0 84 FUNC(4, 4, shuffle_bytes_2103), /* rgb32tobgr32 */
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85 FUNC(0, 0, NULL)
86 };
87 int width;
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88 int failed = 0;
89 int srcBpp = 0;
90 int dstBpp = 0;
3a74415d 91
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92 if (!func_info[funcNum].func)
93 break;
3a74415d 94
999484c9 95 av_log(NULL, AV_LOG_INFO, ".");
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96 memset(srcBuffer, srcByte, SIZE);
97
999484c9 98 for (width = 63; width > 0; width--) {
3a74415d 99 int dstOffset;
999484c9 100 for (dstOffset = 128; dstOffset < 196; dstOffset += 4) {
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101 int srcOffset;
102 memset(dstBuffer, dstByte, SIZE);
103
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104 for (srcOffset = 128; srcOffset < 196; srcOffset += 4) {
105 uint8_t *src = srcBuffer + srcOffset;
106 uint8_t *dst = dstBuffer + dstOffset;
107 const char *name = NULL;
6a4970ab 108
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109 // don't fill the screen with shit ...
110 if (failed)
111 break;
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112
113 srcBpp = func_info[funcNum].src_bpp;
114 dstBpp = func_info[funcNum].dst_bpp;
115 name = func_info[funcNum].name;
116
999484c9 117 func_info[funcNum].func(src, dst, width * srcBpp);
3a74415d 118
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119 if (!srcBpp)
120 break;
3a74415d 121
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122 for (i = 0; i < SIZE; i++) {
123 if (srcBuffer[i] != srcByte) {
124 av_log(NULL, AV_LOG_INFO,
125 "src damaged at %d w:%d src:%d dst:%d %s\n",
6e42e6c4 126 i, width, srcOffset, dstOffset, name);
999484c9 127 failed = 1;
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128 break;
129 }
130 }
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131 for (i = 0; i < dstOffset; i++) {
132 if (dstBuffer[i] != dstByte) {
133 av_log(NULL, AV_LOG_INFO,
134 "dst damaged at %d w:%d src:%d dst:%d %s\n",
6e42e6c4 135 i, width, srcOffset, dstOffset, name);
999484c9 136 failed = 1;
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137 break;
138 }
139 }
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140 for (i = dstOffset + width * dstBpp; i < SIZE; i++) {
141 if (dstBuffer[i] != dstByte) {
142 av_log(NULL, AV_LOG_INFO,
143 "dst damaged at %d w:%d src:%d dst:%d %s\n",
6e42e6c4 144 i, width, srcOffset, dstOffset, name);
999484c9 145 failed = 1;
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146 break;
147 }
148 }
149 }
150 }
151 }
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152 if (failed)
153 failedNum++;
154 else if (srcBpp)
155 passedNum++;
3a74415d 156 }
6a4970ab 157
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158 av_log(NULL, AV_LOG_INFO,
159 "\n%d converters passed, %d converters randomly overwrote memory\n",
160 passedNum, failedNum);
3a74415d 161 return failedNum;
a31de956 162}