42c5f68362
Use the duration of the stream we're actually decoding - not the "global" attribute AVFormatContext::duration which may differ.
105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_FFMPEG_TIME_HXX
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#define MPD_FFMPEG_TIME_HXX
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#include "Chrono.hxx"
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#include "Compiler.h"
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extern "C" {
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#include <libavutil/avutil.h>
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#include <libavutil/mathematics.h>
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}
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#include <assert.h>
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#include <stdint.h>
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/* suppress the ffmpeg compatibility macro */
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#ifdef SampleFormat
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#undef SampleFormat
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#endif
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gcc_const
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static inline double
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FfmpegTimeToDouble(int64_t t, const AVRational time_base)
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{
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assert(t != (int64_t)AV_NOPTS_VALUE);
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return (double)av_rescale_q(t, time_base, (AVRational){1, 1024})
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/ (double)1024;
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}
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template<typename Ratio>
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static inline constexpr AVRational
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RatioToAVRational()
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{
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return { Ratio::num, Ratio::den };
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}
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/**
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* Convert a FFmpeg time stamp to a #SongTime.
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*/
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gcc_const
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static inline SongTime
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FromFfmpegTime(int64_t t, const AVRational time_base)
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{
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assert(t != (int64_t)AV_NOPTS_VALUE);
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return SongTime::FromMS(av_rescale_q(t, time_base,
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(AVRational){1, 1000}));
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}
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/**
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* Convert a FFmpeg time stamp to a #SignedSongTime.
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*/
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gcc_const
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static inline SignedSongTime
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FromFfmpegTimeChecked(int64_t t, const AVRational time_base)
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{
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return t != (int64_t)AV_NOPTS_VALUE
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? SignedSongTime(FromFfmpegTime(t, time_base))
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: SignedSongTime::Negative();
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}
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/**
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* Convert a #SongTime to a FFmpeg time stamp with the given base.
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*/
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gcc_const
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static inline int64_t
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ToFfmpegTime(SongTime t, const AVRational time_base)
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{
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return av_rescale_q(t.count(),
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RatioToAVRational<SongTime::period>(),
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time_base);
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}
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/**
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* Replace #AV_NOPTS_VALUE with the given fallback.
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*/
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static constexpr int64_t
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FfmpegTimestampFallback(int64_t t, int64_t fallback)
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{
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return gcc_likely(t != int64_t(AV_NOPTS_VALUE))
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? t
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: fallback;
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}
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#endif
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