mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
121 lines
4.3 KiB
C
121 lines
4.3 KiB
C
/*
|
|
* 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 = 0;
|
|
AVInputFormat *fmt = NULL;
|
|
|
|
while ((fmt = av_iformat_next(fmt))) {
|
|
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(void)
|
|
{
|
|
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;
|
|
}
|