/* * 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;}