mirror of
https://git.ffmpeg.org/ffmpeg.git
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134 lines
4.7 KiB
C
134 lines
4.7 KiB
C
/*
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* copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include "libavformat/avformat.h"
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#include "libavcodec/put_bits.h"
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#include "libavutil/lfg.h"
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static int score_array[1000]; //this must be larger than the number of formats
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static int failures = 0;
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static void probe(AVProbeData *pd, int type, int p, int size)
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{
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int i = 0;
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AVInputFormat *fmt = NULL;
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while ((fmt = av_iformat_next(fmt))) {
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if (fmt->flags & AVFMT_NOFILE)
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continue;
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if (fmt->read_probe) {
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int score = fmt->read_probe(pd);
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if (score > score_array[i] && score > AVPROBE_SCORE_MAX / 4) {
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score_array[i] = score;
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fprintf(stderr,
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"Failure of %s probing code with score=%d type=%d p=%X size=%d\n",
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fmt->name, score, type, p, size);
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failures++;
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}
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}
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i++;
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}
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}
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int main(int argc, char **argv)
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{
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unsigned int p, i, type, size, retry;
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AVProbeData pd;
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AVLFG state;
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PutBitContext pb;
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int retry_count= 4097;
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int max_size = 65537;
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if(argc >= 2)
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retry_count = atoi(argv[1]);
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if(argc >= 3)
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max_size = atoi(argv[2]);
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avcodec_register_all();
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av_register_all();
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av_lfg_init(&state, 0xdeadbeef);
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pd.buf = NULL;
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for (size = 1; size < max_size; size *= 2) {
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pd.buf_size = size;
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pd.buf = av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE);
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pd.filename = "";
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fprintf(stderr, "testing size=%d\n", size);
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for (retry = 0; retry < retry_count; retry += FFMAX(size, 32)) {
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for (type = 0; type < 4; type++) {
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for (p = 0; p < 4096; p++) {
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unsigned hist = 0;
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init_put_bits(&pb, pd.buf, size);
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switch (type) {
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case 0:
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for (i = 0; i < size * 8; i++)
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put_bits(&pb, 1, (av_lfg_get(&state) & 0xFFFFFFFF) > p << 20);
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break;
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case 1:
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for (i = 0; i < size * 8; i++) {
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unsigned int p2 = hist ? p & 0x3F : (p >> 6);
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unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 26;
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put_bits(&pb, 1, v);
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hist = v;
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}
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break;
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case 2:
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for (i = 0; i < size * 8; i++) {
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unsigned int p2 = (p >> (hist * 3)) & 7;
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unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 29;
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put_bits(&pb, 1, v);
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hist = (2 * hist + v) & 3;
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}
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break;
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case 3:
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for (i = 0; i < size; i++) {
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int c = 0;
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while (p & 63) {
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c = (av_lfg_get(&state) & 0xFFFFFFFF) >> 24;
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if (c >= 'a' && c <= 'z' && (p & 1))
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break;
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else if (c >= 'A' && c <= 'Z' && (p & 2))
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break;
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else if (c >= '0' && c <= '9' && (p & 4))
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break;
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else if (c == ' ' && (p & 8))
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break;
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else if (c == 0 && (p & 16))
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break;
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else if (c == 1 && (p & 32))
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break;
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}
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pd.buf[i] = c;
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}
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}
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flush_put_bits(&pb);
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probe(&pd, type, p, size);
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}
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}
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}
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}
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return failures;
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}
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