Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / tools / probetest.c
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
29 static int score_array[MAX_FORMATS];
30 static int64_t time_array[MAX_FORMATS];
31 static int failures = 0;
32
33 #ifndef AV_READ_TIME
34 #define AV_READ_TIME(x) 0
35 #endif
36
37 static void probe(AVProbeData *pd, int type, int p, int size)
38 {
39 int i = 0;
40 AVInputFormat *fmt = NULL;
41
42 while ((fmt = av_iformat_next(fmt))) {
43 if (fmt->flags & AVFMT_NOFILE)
44 continue;
45 if (fmt->read_probe) {
46 int score;
47 int64_t start = AV_READ_TIME();
48 score = fmt->read_probe(pd);
49 time_array[i] += AV_READ_TIME() - start;
50 if (score > score_array[i] && score > AVPROBE_SCORE_MAX / 4) {
51 score_array[i] = score;
52 fprintf(stderr,
53 "Failure of %s probing code with score=%d type=%d p=%X size=%d\n",
54 fmt->name, score, type, p, size);
55 failures++;
56 }
57 }
58 i++;
59 }
60 }
61
62 static void print_times(void)
63 {
64 int i = 0;
65 AVInputFormat *fmt = NULL;
66
67 while ((fmt = av_iformat_next(fmt))) {
68 if (fmt->flags & AVFMT_NOFILE)
69 continue;
70 if (time_array[i] > 1000000) {
71 fprintf(stderr, "%12"PRIu64" cycles, %12s\n",
72 time_array[i], fmt->name);
73 }
74 i++;
75 }
76 }
77
78 int main(int argc, char **argv)
79 {
80 unsigned int p, i, type, size, retry;
81 AVProbeData pd = { 0 };
82 AVLFG state;
83 PutBitContext pb;
84 int retry_count= 4097;
85 int max_size = 65537;
86
87 if(argc >= 2)
88 retry_count = atoi(argv[1]);
89 if(argc >= 3)
90 max_size = atoi(argv[2]);
91
92 if (max_size > 1000000000U/8) {
93 fprintf(stderr, "max_size out of bounds\n");
94 return 1;
95 }
96
97 if (retry_count > 1000000000U) {
98 fprintf(stderr, "retry_count out of bounds\n");
99 return 1;
100 }
101
102 avcodec_register_all();
103 av_register_all();
104
105 av_lfg_init(&state, 0xdeadbeef);
106
107 pd.buf = NULL;
108 for (size = 1; size < max_size; size *= 2) {
109 pd.buf_size = size;
110 pd.buf = av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE);
111 pd.filename = "";
112
113 if (!pd.buf) {
114 fprintf(stderr, "out of memory\n");
115 return 1;
116 }
117
118 memset(pd.buf, 0, size + AVPROBE_PADDING_SIZE);
119
120 fprintf(stderr, "testing size=%d\n", size);
121
122 for (retry = 0; retry < retry_count; retry += FFMAX(size, 32)) {
123 for (type = 0; type < 4; type++) {
124 for (p = 0; p < 4096; p++) {
125 unsigned hist = 0;
126 init_put_bits(&pb, pd.buf, size);
127 switch (type) {
128 case 0:
129 for (i = 0; i < size * 8; i++)
130 put_bits(&pb, 1, (av_lfg_get(&state) & 0xFFFFFFFF) > p << 20);
131 break;
132 case 1:
133 for (i = 0; i < size * 8; i++) {
134 unsigned int p2 = hist ? p & 0x3F : (p >> 6);
135 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 26;
136 put_bits(&pb, 1, v);
137 hist = v;
138 }
139 break;
140 case 2:
141 for (i = 0; i < size * 8; i++) {
142 unsigned int p2 = (p >> (hist * 3)) & 7;
143 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 29;
144 put_bits(&pb, 1, v);
145 hist = (2 * hist + v) & 3;
146 }
147 break;
148 case 3:
149 for (i = 0; i < size; i++) {
150 int c = 0;
151 while (p & 63) {
152 c = (av_lfg_get(&state) & 0xFFFFFFFF) >> 24;
153 if (c >= 'a' && c <= 'z' && (p & 1))
154 break;
155 else if (c >= 'A' && c <= 'Z' && (p & 2))
156 break;
157 else if (c >= '0' && c <= '9' && (p & 4))
158 break;
159 else if (c == ' ' && (p & 8))
160 break;
161 else if (c == 0 && (p & 16))
162 break;
163 else if (c == 1 && (p & 32))
164 break;
165 }
166 pd.buf[i] = c;
167 }
168 }
169 flush_put_bits(&pb);
170 probe(&pd, type, p, size);
171 }
172 }
173 }
174 }
175 if(AV_READ_TIME())
176 print_times();
177 return failures;
178 }