| /* |
| * 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; |
| } |