/
githubmirror
/
FFmpeg
Обзор
Документация
Войти
/
githubmirror
/
FFmpeg
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
libavutil/timestamp.c
36 строк
1 KB
Marton Balint
avutil/timestamp: avoid possible FPE when 0 is passed to av_ts_make_time_string2()
30 июн 2024, 10:11
30 июн 2024, 10:11
0d5e3f5
Код
Авторство
О чём код?
/* * 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 "timestamp.h" char *av_ts_make_time_string2(char *buf, int64_t ts, AVRational tb) { if (ts == AV_NOPTS_VALUE) { snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS"); } else { double val = av_q2d(tb) * ts; double log = (fpclassify(val) == FP_ZERO ? -INFINITY : floor(log10(fabs(val)))); int precision = (isfinite(log) && log < 0) ? -log + 5 : 6; int last = snprintf(buf, AV_TS_MAX_STRING_SIZE, "%.*f", precision, val); last = FFMIN(last, AV_TS_MAX_STRING_SIZE - 1) - 1; for (; last && buf[last] == '0'; last--); for (; last && buf[last] != 'f' && (buf[last] < '0' || buf[0] > '9'); last--); buf[last + 1] = '\0'; } return buf; }