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; 32 33#ifndef AV_READ_TIME 34#define AV_READ_TIME(x) 0 35#endif 36 37static 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 62static 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 78int main(int argc, char **argv) 79{ 80 unsigned int p, i, type, size, retry; 81 AVProbeData pd; 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} 179