67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
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/*
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* Copyright (C) 2003-2013 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_PEAK_BUFFER_HXX
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#define MPD_PEAK_BUFFER_HXX
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#include "gcc.h"
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#include <stddef.h>
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struct fifo_buffer;
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/**
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* A FIFO-like buffer that will allocate more memory on demand to
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* allow large peaks. This second buffer will be given back to the
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* kernel when it has been consumed.
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*/
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class PeakBuffer {
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size_t normal_size, peak_size;
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fifo_buffer *normal_buffer, *peak_buffer;
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public:
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PeakBuffer(size_t _normal_size, size_t _peak_size)
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:normal_size(_normal_size), peak_size(_peak_size),
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normal_buffer(nullptr), peak_buffer(nullptr) {}
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PeakBuffer(PeakBuffer &&other)
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:normal_size(other.normal_size), peak_size(other.peak_size),
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normal_buffer(other.normal_buffer),
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peak_buffer(other.peak_buffer) {
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other.normal_buffer = nullptr;
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other.peak_buffer = nullptr;
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}
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~PeakBuffer();
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PeakBuffer(const PeakBuffer &) = delete;
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PeakBuffer &operator=(const PeakBuffer &) = delete;
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gcc_pure
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bool IsEmpty() const;
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const void *Read(size_t *length_r) const;
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void Consume(size_t length);
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bool Append(const void *data, size_t length);
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};
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#endif
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