Libav 0.7.1
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00001 /* 00002 * copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at> 00003 * 00004 * This file is part of Libav. 00005 * 00006 * Libav is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * Libav is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with Libav; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 #include <stdlib.h> 00022 00023 #include "libavformat/avformat.h" 00024 #include "libavcodec/put_bits.h" 00025 #include "libavutil/lfg.h" 00026 00027 static int score_array[1000]; //this must be larger than the number of formats 00028 static int failures = 0; 00029 00030 static void probe(AVProbeData *pd, int type, int p, int size) 00031 { 00032 int i = 0; 00033 AVInputFormat *fmt = NULL; 00034 00035 while ((fmt = av_iformat_next(fmt))) { 00036 if (fmt->flags & AVFMT_NOFILE) 00037 continue; 00038 if (fmt->read_probe) { 00039 int score = fmt->read_probe(pd); 00040 if (score > score_array[i] && score > AVPROBE_SCORE_MAX / 4) { 00041 score_array[i] = score; 00042 fprintf(stderr, "Failure of %s probing code with score=%d type=%d p=%X size=%d\n", 00043 fmt->name, score, type, p, size); 00044 failures++; 00045 } 00046 } 00047 i++; 00048 } 00049 } 00050 00051 int main(void) 00052 { 00053 unsigned int p, i, type, size, retry; 00054 AVProbeData pd; 00055 AVLFG state; 00056 PutBitContext pb; 00057 00058 avcodec_register_all(); 00059 av_register_all(); 00060 00061 av_lfg_init(&state, 0xdeadbeef); 00062 00063 pd.buf = NULL; 00064 for (size = 1; size < 65537; size *= 2) { 00065 pd.buf_size = size; 00066 pd.buf = av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE); 00067 pd.filename = ""; 00068 00069 fprintf(stderr, "testing size=%d\n", size); 00070 00071 for (retry = 0; retry < 4097; retry += FFMAX(size, 32)) { 00072 for (type = 0; type < 4; type++) { 00073 for (p = 0; p < 4096; p++) { 00074 unsigned hist = 0; 00075 init_put_bits(&pb, pd.buf, size); 00076 switch (type) { 00077 case 0: 00078 for (i = 0; i < size * 8; i++) { 00079 put_bits(&pb, 1, (av_lfg_get(&state) & 0xFFFFFFFF) > p << 20); 00080 } 00081 break; 00082 case 1: 00083 for (i = 0; i < size * 8; i++) { 00084 unsigned int p2 = hist ? p & 0x3F : (p >> 6); 00085 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 26; 00086 put_bits(&pb, 1, v); 00087 hist = v; 00088 } 00089 break; 00090 case 2: 00091 for (i = 0; i < size * 8; i++) { 00092 unsigned int p2 = (p >> (hist*3)) & 7; 00093 unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 29; 00094 put_bits(&pb, 1, v); 00095 hist = (2*hist + v) & 3; 00096 } 00097 break; 00098 case 3: 00099 for (i = 0; i < size; i++) { 00100 int c = 0; 00101 while (p & 63) { 00102 c = (av_lfg_get(&state) & 0xFFFFFFFF) >> 24; 00103 if (c >= 'a' && c <= 'z' && (p & 1)) break; 00104 else if(c >= 'A' && c <= 'Z' && (p & 2)) break; 00105 else if(c >= '0' && c <= '9' && (p & 4)) break; 00106 else if(c == ' ' && (p & 8)) break; 00107 else if(c == 0 && (p & 16)) break; 00108 else if(c == 1 && (p & 32)) break; 00109 } 00110 pd.buf[i] = c; 00111 } 00112 } 00113 flush_put_bits(&pb); 00114 probe(&pd, type, p, size); 00115 } 00116 } 00117 } 00118 } 00119 return failures; 00120 }