1/* 2 * copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of Libav. 5 * 6 * Libav 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 * Libav 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 Libav; 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 27static int score_array[1000]; //this must be larger than the number of formats 28static int failures = 0; 29 30static void probe(AVProbeData *pd, int type, int p, int size) 31{ 32 int i = 0; 33 AVInputFormat *fmt = NULL; 34 35 while ((fmt = av_iformat_next(fmt))) { 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", 43 fmt->name, score, type, p, size); 44 failures++; 45 } 46 } 47 i++; 48 } 49} 50 51int main(void) 52{ 53 unsigned int p, i, type, size, retry; 54 AVProbeData pd; 55 AVLFG state; 56 PutBitContext pb; 57 58 avcodec_register_all(); 59 av_register_all(); 60 61 av_lfg_init(&state, 0xdeadbeef); 62 63 pd.buf = NULL; 64 for (size = 1; size < 65537; size *= 2) { 65 pd.buf_size = size; 66 pd.buf = av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE); 67 pd.filename = ""; 68 69 fprintf(stderr, "testing size=%d\n", size); 70 71 for (retry = 0; retry < 4097; retry += FFMAX(size, 32)) { 72 for (type = 0; type < 4; type++) { 73 for (p = 0; p < 4096; p++) { 74 unsigned hist = 0; 75 init_put_bits(&pb, pd.buf, size); 76 switch (type) { 77 case 0: 78 for (i = 0; i < size * 8; i++) { 79 put_bits(&pb, 1, (av_lfg_get(&state) & 0xFFFFFFFF) > p << 20); 80 } 81 break; 82 case 1: 83 for (i = 0; i < size * 8; i++) { 84 unsigned int p2 = hist ? p & 0x3F : (p >> 6); 85 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 26; 86 put_bits(&pb, 1, v); 87 hist = v; 88 } 89 break; 90 case 2: 91 for (i = 0; i < size * 8; i++) { 92 unsigned int p2 = (p >> (hist*3)) & 7; 93 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 29; 94 put_bits(&pb, 1, v); 95 hist = (2*hist + v) & 3; 96 } 97 break; 98 case 3: 99 for (i = 0; i < size; i++) { 100 int c = 0; 101 while (p & 63) { 102 c = (av_lfg_get(&state) & 0xFFFFFFFF) >> 24; 103 if (c >= 'a' && c <= 'z' && (p & 1)) break; 104 else if(c >= 'A' && c <= 'Z' && (p & 2)) break; 105 else if(c >= '0' && c <= '9' && (p & 4)) break; 106 else if(c == ' ' && (p & 8)) break; 107 else if(c == 0 && (p & 16)) break; 108 else if(c == 1 && (p & 32)) break; 109 } 110 pd.buf[i] = c; 111 } 112 } 113 flush_put_bits(&pb); 114 probe(&pd, type, p, size); 115 } 116 } 117 } 118 } 119 return failures; 120} 121