/* * 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 "libavformat/demux.h" #include "libavcodec/put_bits.h" #include "libavutil/lfg.h" #include "libavutil/mem.h" #include "libavutil/timer.h" #define MAX_FORMATS 1000 //this must be larger than the number of formats static int score_array[MAX_FORMATS]; static int64_t time_array[MAX_FORMATS]; static int failures = 0; static const char *single_format; #ifndef AV_READ_TIME #define AV_READ_TIME(x) 0 #endif static void probe(AVProbeData *pd, int type, int p, int size) { int i = 0; const AVInputFormat *fmt = NULL; void *fmt_opaque = NULL; while ((fmt = av_demuxer_iterate(&fmt_opaque))) { if (fmt->flags & AVFMT_NOFILE) continue; if (ffifmt(fmt)->read_probe && (!single_format || !strcmp(single_format, fmt->name)) ) { int score; int64_t start = AV_READ_TIME(); score = ffifmt(fmt)->read_probe(pd); time_array[i] += AV_READ_TIME() - start; 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++; } } static void print_times(void) { int i = 0; const AVInputFormat *fmt = NULL; void *fmt_opaque = NULL; while ((fmt = av_demuxer_iterate(&fmt_opaque))) { if (fmt->flags & AVFMT_NOFILE) continue; if (time_array[i] > 1000000) { fprintf(stderr, "%12"PRIu64" cycles, %12s\n", time_array[i], fmt->name); } i++; } } static int read_int(char *arg) { int ret; if (!arg || !*arg) return -1; ret = strtol(arg, &arg, 0); if (*arg) return -1; return ret; } int main(int argc, char **argv) { unsigned int p, i, type, size, retry; AVProbeData pd = { 0 }; AVLFG state; PutBitContext pb; int retry_count= 4097; int max_size = 65537; int j; for (j = i = 1; i<argc; i++) { if (!strcmp(argv[i], "-f") && i+1<argc && !single_format) { single_format = argv[++i]; } else if (read_int(argv[i])>0 && j == 1) { retry_count = read_int(argv[i]); j++; } else if (read_int(argv[i])>0 && j == 2) { max_size = read_int(argv[i]); j++; } else { fprintf(stderr, "probetest [-f <input format>] [<retry_count> [<max_size>]]\n"); return 1; } } if (max_size > 1000000000U/8) { fprintf(stderr, "max_size out of bounds\n"); return 1; } if (retry_count > 1000000000U) { fprintf(stderr, "retry_count out of bounds\n"); return 1; } av_lfg_init(&state, 0xdeadbeef); pd.buf = NULL; for (size = 1; size < max_size; size *= 2) { pd.buf_size = size; pd.buf = av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE); pd.filename = ""; if (!pd.buf) { fprintf(stderr, "out of memory\n"); return 1; } memset(pd.buf, 0, size + AVPROBE_PADDING_SIZE); fprintf(stderr, "testing size=%d\n", size); for (retry = 0; retry < retry_count; 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); } } } } if(AV_READ_TIME()) print_times(); return failures; }