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authorMichael Niedermayer <michaelni@gmx.at>2009-09-15 10:42:01 +0000
committerMichael Niedermayer <michaelni@gmx.at>2009-09-15 10:42:01 +0000
commit6e7ef5ec358c495a3c82f86d3d9d73ededa42983 (patch)
tree079a913c211f14e45de8e69d595df955d273f93a /tools
parent3489e150d98b9d52fc2cee76059e58132c888126 (diff)
downloadffmpeg-streaming-6e7ef5ec358c495a3c82f86d3d9d73ededa42983.zip
ffmpeg-streaming-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.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/tools/probetest.c b/tools/probetest.c
new file mode 100644
index 0000000..a49bb41
--- /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;
+}
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