65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
/*
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* Copyright 2003-2021 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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#include "MixRampAnalyzer.hxx"
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#include "util/ConstBuffer.hxx"
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inline void
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MixRampData::Add(MixRampItem item) noexcept
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{
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for (std::size_t i = 0; i < mixramp_volumes.size(); ++i) {
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if (start[i].time < FloatDuration{} &&
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item.volume >= mixramp_volumes[i])
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start[i] = item;
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if (item.volume >= mixramp_volumes[i])
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end[i] = item;
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}
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}
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void
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MixRampAnalyzer::Process(ConstBuffer<ReplayGainAnalyzer::Frame> src) noexcept
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{
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while (!src.empty()) {
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std::size_t chunk_remaining = chunk_frames - chunk_fill;
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assert(chunk_remaining > 0);
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if (chunk_remaining > src.size) {
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gain_analyzer.Process(src);
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chunk_fill += src.size;
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return;
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}
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gain_analyzer.Process({src.data, chunk_remaining});
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src.skip_front(chunk_remaining);
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gain_analyzer.Flush();
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const double gain = (double)gain_analyzer.GetGain();
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const double volume = -gain;
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result.Add({GetTime(), volume});
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++chunk_number;
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chunk_fill = 0;
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gain_analyzer = {};
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}
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}
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