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author | Michael Niedermayer <michaelni@gmx.at> | 2009-09-15 10:42:01 +0000 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2009-09-15 10:42:01 +0000 |
commit | 6e7ef5ec358c495a3c82f86d3d9d73ededa42983 (patch) | |
tree | 079a913c211f14e45de8e69d595df955d273f93a /tools | |
parent | 3489e150d98b9d52fc2cee76059e58132c888126 (diff) | |
download | ffmpeg-6e7ef5ec358c495a3c82f86d3d9d73ededa42983.tar.gz |
Probetest, to test the demuxers probe functions against random and not so random
input.
Originally committed as revision 19853 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'tools')
-rw-r--r-- | tools/probetest.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/tools/probetest.c b/tools/probetest.c new file mode 100644 index 0000000000..a49bb41454 --- /dev/null +++ b/tools/probetest.c @@ -0,0 +1,119 @@ +/* + * copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdlib.h> + +#include "libavformat/avformat.h" +#include "libavcodec/put_bits.h" +#include "libavutil/lfg.h" + +static int score_array[1000]; //this must be larger than the number of formats +static int failures=0; + +static void probe(AVProbeData *pd, int type, int p, int size) +{ + int i; + AVInputFormat *fmt; + + for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) { + if (fmt->flags & AVFMT_NOFILE) + continue; + if (fmt->read_probe) { + int score = fmt->read_probe(pd); + if(score > score_array[i] && score > AVPROBE_SCORE_MAX/4){ + score_array[i]= score; + fprintf(stderr, "Failure of %s probing code with score=%d type=%d p=%X size=%d\n", fmt->name, score, type, p, size); + failures++; + } + } + i++; + } +} + +int main(int argc, char **argv) +{ + unsigned int p, i, type, size, retry; + AVProbeData pd; + AVLFG state; + PutBitContext pb; + + avcodec_register_all(); + av_register_all(); + + av_lfg_init(&state, 0xdeadbeef); + + pd.buf= NULL; + for(size= 1; size < 65537; size*=2){ + pd.buf_size= size; + pd.buf= av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE); + pd.filename= ""; + + fprintf(stderr, "testing size=%d\n", size); + + for(retry=0; retry<4097; retry+= FFMAX(size,32)){ + for(type=0; type < 4; type++){ + for(p=0; p<4096; p++){ + unsigned hist=0; + init_put_bits(&pb, pd.buf, size); + switch(type){ + case 0: + for(i=0; i<size*8; i++){ + put_bits(&pb, 1, (av_lfg_get(&state)&0xFFFFFFFF) > p<<20); + } + break; + case 1: + for(i=0; i<size*8; i++){ + unsigned int p2= hist ? p&0x3F : (p>>6); + unsigned int v= (av_lfg_get(&state)&0xFFFFFFFF) > p2<<26; + put_bits(&pb, 1, v); + hist= v; + } + break; + case 2: + for(i=0; i<size*8; i++){ + unsigned int p2= (p >> (hist*3)) & 7; + unsigned int v= (av_lfg_get(&state)&0xFFFFFFFF) > p2<<29; + put_bits(&pb, 1, v); + hist= (2*hist + v)&3; + } + break; + case 3: + for(i=0; i<size; i++){ + int c=0; + while(p&63){ + c= (av_lfg_get(&state)&0xFFFFFFFF)>>24; + if (c >= 'a' && c <= 'z' && (p&1)) break; + else if(c >= 'A' && c <= 'Z' && (p&2)) break; + else if(c >= '0' && c <= '9' && (p&4)) break; + else if(c == ' '&& (p&8)) break; + else if(c == 0 && (p&16)) break; + else if(c == 1 && (p&32)) break; + } + pd.buf[i]= c; + } + } + flush_put_bits(&pb); + probe(&pd, type, p, size); + } + } + } + } + return failures; +} |