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path: root/tools/probetest.c (plain)
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1/*
2 * copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
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#include <stdlib.h>
22
23#include "libavformat/avformat.h"
24#include "libavcodec/put_bits.h"
25#include "libavutil/lfg.h"
26#include "libavutil/timer.h"
27
28#define MAX_FORMATS 1000 //this must be larger than the number of formats
29static int score_array[MAX_FORMATS];
30static int64_t time_array[MAX_FORMATS];
31static int failures = 0;
32static const char *single_format;
33
34#ifndef AV_READ_TIME
35#define AV_READ_TIME(x) 0
36#endif
37
38static void probe(AVProbeData *pd, int type, int p, int size)
39{
40 int i = 0;
41 AVInputFormat *fmt = NULL;
42
43 while ((fmt = av_iformat_next(fmt))) {
44 if (fmt->flags & AVFMT_NOFILE)
45 continue;
46 if (fmt->read_probe &&
47 (!single_format || !strcmp(single_format, fmt->name))
48 ) {
49 int score;
50 int64_t start = AV_READ_TIME();
51 score = fmt->read_probe(pd);
52 time_array[i] += AV_READ_TIME() - start;
53 if (score > score_array[i] && score > AVPROBE_SCORE_MAX / 4) {
54 score_array[i] = score;
55 fprintf(stderr,
56 "Failure of %s probing code with score=%d type=%d p=%X size=%d\n",
57 fmt->name, score, type, p, size);
58 failures++;
59 }
60 }
61 i++;
62 }
63}
64
65static void print_times(void)
66{
67 int i = 0;
68 AVInputFormat *fmt = NULL;
69
70 while ((fmt = av_iformat_next(fmt))) {
71 if (fmt->flags & AVFMT_NOFILE)
72 continue;
73 if (time_array[i] > 1000000) {
74 fprintf(stderr, "%12"PRIu64" cycles, %12s\n",
75 time_array[i], fmt->name);
76 }
77 i++;
78 }
79}
80
81static int read_int(char *arg) {
82 int ret;
83
84 if (!arg || !*arg)
85 return -1;
86 ret = strtol(arg, &arg, 0);
87 if (*arg)
88 return -1;
89 return ret;
90}
91
92int main(int argc, char **argv)
93{
94 unsigned int p, i, type, size, retry;
95 AVProbeData pd = { 0 };
96 AVLFG state;
97 PutBitContext pb;
98 int retry_count= 4097;
99 int max_size = 65537;
100 int j;
101
102 for (j = i = 1; i<argc; i++) {
103 if (!strcmp(argv[i], "-f") && i+1<argc && !single_format) {
104 single_format = argv[++i];
105 } else if (read_int(argv[i])>0 && j == 1) {
106 retry_count = read_int(argv[i]);
107 j++;
108 } else if (read_int(argv[i])>0 && j == 2) {
109 max_size = read_int(argv[i]);
110 j++;
111 } else {
112 fprintf(stderr, "probetest [-f <input format>] [<retry_count> [<max_size>]]\n");
113 return 1;
114 }
115 }
116
117 if (max_size > 1000000000U/8) {
118 fprintf(stderr, "max_size out of bounds\n");
119 return 1;
120 }
121
122 if (retry_count > 1000000000U) {
123 fprintf(stderr, "retry_count out of bounds\n");
124 return 1;
125 }
126
127 avcodec_register_all();
128 av_register_all();
129
130 av_lfg_init(&state, 0xdeadbeef);
131
132 pd.buf = NULL;
133 for (size = 1; size < max_size; size *= 2) {
134 pd.buf_size = size;
135 pd.buf = av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE);
136 pd.filename = "";
137
138 if (!pd.buf) {
139 fprintf(stderr, "out of memory\n");
140 return 1;
141 }
142
143 memset(pd.buf, 0, size + AVPROBE_PADDING_SIZE);
144
145 fprintf(stderr, "testing size=%d\n", size);
146
147 for (retry = 0; retry < retry_count; retry += FFMAX(size, 32)) {
148 for (type = 0; type < 4; type++) {
149 for (p = 0; p < 4096; p++) {
150 unsigned hist = 0;
151 init_put_bits(&pb, pd.buf, size);
152 switch (type) {
153 case 0:
154 for (i = 0; i < size * 8; i++)
155 put_bits(&pb, 1, (av_lfg_get(&state) & 0xFFFFFFFF) > p << 20);
156 break;
157 case 1:
158 for (i = 0; i < size * 8; i++) {
159 unsigned int p2 = hist ? p & 0x3F : (p >> 6);
160 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 26;
161 put_bits(&pb, 1, v);
162 hist = v;
163 }
164 break;
165 case 2:
166 for (i = 0; i < size * 8; i++) {
167 unsigned int p2 = (p >> (hist * 3)) & 7;
168 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 29;
169 put_bits(&pb, 1, v);
170 hist = (2 * hist + v) & 3;
171 }
172 break;
173 case 3:
174 for (i = 0; i < size; i++) {
175 int c = 0;
176 while (p & 63) {
177 c = (av_lfg_get(&state) & 0xFFFFFFFF) >> 24;
178 if (c >= 'a' && c <= 'z' && (p & 1))
179 break;
180 else if (c >= 'A' && c <= 'Z' && (p & 2))
181 break;
182 else if (c >= '0' && c <= '9' && (p & 4))
183 break;
184 else if (c == ' ' && (p & 8))
185 break;
186 else if (c == 0 && (p & 16))
187 break;
188 else if (c == 1 && (p & 32))
189 break;
190 }
191 pd.buf[i] = c;
192 }
193 }
194 flush_put_bits(&pb);
195 probe(&pd, type, p, size);
196 }
197 }
198 }
199 }
200 if(AV_READ_TIME())
201 print_times();
202 return failures;
203}
204
generated by cgit at 2024-05-17 20:27:00 (GMT)