8ff77a45fb75490fce48a5c3b592f8b8b677c65c
[libav.git] / 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
27 static int score_array[1000]; //this must be larger than the number of formats
28 static int failures=0;
29
30 static void probe(AVProbeData *pd, int type, int p, int size)
31 {
32 int i = 0;
33 AVInputFormat *fmt;
34
35 for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) {
36 if (fmt->flags & AVFMT_NOFILE)
37 continue;
38 if (fmt->read_probe) {
39 int score = fmt->read_probe(pd);
40 if(score > score_array[i] && score > AVPROBE_SCORE_MAX/4){
41 score_array[i]= score;
42 fprintf(stderr, "Failure of %s probing code with score=%d type=%d p=%X size=%d\n", fmt->name, score, type, p, size);
43 failures++;
44 }
45 }
46 i++;
47 }
48 }
49
50 int main(int argc, char **argv)
51 {
52 unsigned int p, i, type, size, retry;
53 AVProbeData pd;
54 AVLFG state;
55 PutBitContext pb;
56
57 avcodec_register_all();
58 av_register_all();
59
60 av_lfg_init(&state, 0xdeadbeef);
61
62 pd.buf= NULL;
63 for(size= 1; size < 65537; size*=2){
64 pd.buf_size= size;
65 pd.buf= av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE);
66 pd.filename= "";
67
68 fprintf(stderr, "testing size=%d\n", size);
69
70 for(retry=0; retry<4097; retry+= FFMAX(size,32)){
71 for(type=0; type < 4; type++){
72 for(p=0; p<4096; p++){
73 unsigned hist=0;
74 init_put_bits(&pb, pd.buf, size);
75 switch(type){
76 case 0:
77 for(i=0; i<size*8; i++){
78 put_bits(&pb, 1, (av_lfg_get(&state)&0xFFFFFFFF) > p<<20);
79 }
80 break;
81 case 1:
82 for(i=0; i<size*8; i++){
83 unsigned int p2= hist ? p&0x3F : (p>>6);
84 unsigned int v= (av_lfg_get(&state)&0xFFFFFFFF) > p2<<26;
85 put_bits(&pb, 1, v);
86 hist= v;
87 }
88 break;
89 case 2:
90 for(i=0; i<size*8; i++){
91 unsigned int p2= (p >> (hist*3)) & 7;
92 unsigned int v= (av_lfg_get(&state)&0xFFFFFFFF) > p2<<29;
93 put_bits(&pb, 1, v);
94 hist= (2*hist + v)&3;
95 }
96 break;
97 case 3:
98 for(i=0; i<size; i++){
99 int c=0;
100 while(p&63){
101 c= (av_lfg_get(&state)&0xFFFFFFFF)>>24;
102 if (c >= 'a' && c <= 'z' && (p&1)) break;
103 else if(c >= 'A' && c <= 'Z' && (p&2)) break;
104 else if(c >= '0' && c <= '9' && (p&4)) break;
105 else if(c == ' '&& (p&8)) break;
106 else if(c == 0 && (p&16)) break;
107 else if(c == 1 && (p&32)) break;
108 }
109 pd.buf[i]= c;
110 }
111 }
112 flush_put_bits(&pb);
113 probe(&pd, type, p, size);
114 }
115 }
116 }
117 }
118 return failures;
119 }