73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*
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* Copyright (C) 2003-2015 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_CROSSFADE_HXX
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#define MPD_CROSSFADE_HXX
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#include "Compiler.h"
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struct AudioFormat;
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class SignedSongTime;
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struct CrossFadeSettings {
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/**
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* The configured cross fade duration [s].
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*/
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float duration;
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float mixramp_db;
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/**
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* The configured MixRapm delay [s]. A non-positive value
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* disables MixRamp.
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*/
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float mixramp_delay;
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CrossFadeSettings()
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:duration(0),
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mixramp_db(0),
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mixramp_delay(-1)
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{}
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/**
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* Calculate how many music pipe chunks should be used for crossfading.
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*
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* @param total_time total_time the duration of the new song
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* @param replay_gain_db the ReplayGain adjustment used for this song
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* @param replay_gain_prev_db the ReplayGain adjustment used on the last song
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* @param mixramp_start the next songs mixramp_start tag
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* @param mixramp_prev_end the last songs mixramp_end setting
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* @param af the audio format of the new song
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* @param old_format the audio format of the current song
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* @param max_chunks the maximum number of chunks
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* @return the number of chunks for crossfading, or 0 if cross fading
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* should be disabled for this song change
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*/
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gcc_pure
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unsigned Calculate(SignedSongTime total_time,
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float replay_gain_db, float replay_gain_prev_db,
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const char *mixramp_start,
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const char *mixramp_prev_end,
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AudioFormat af, AudioFormat old_format,
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unsigned max_chunks) const;
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};
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#endif
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