61 lines
1.7 KiB
C++
61 lines
1.7 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 PCM_BUFFER_HXX
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#define PCM_BUFFER_HXX
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#include "util/ReusableArray.hxx"
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#include "Compiler.h"
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#include <stdint.h>
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/**
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* Manager for a temporary buffer which grows as needed. We could
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* allocate a new buffer every time pcm_convert() is called, but that
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* would put too much stress on the allocator.
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*/
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class PcmBuffer {
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ReusableArray<uint8_t, 8192> buffer;
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public:
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void Clear() {
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buffer.Clear();
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}
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/**
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* Get the buffer, and guarantee a minimum size. This buffer becomes
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* invalid with the next pcm_buffer_get() call.
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*
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* This function will never return nullptr, even if size is
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* zero, because the PCM library uses the nullptr return value
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* to signal "error". An empty destination buffer is not
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* always an error.
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*/
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gcc_malloc
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void *Get(size_t size);
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template<typename T>
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gcc_malloc
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T *GetT(size_t n) {
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return (T *)Get(n * sizeof(T));
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}
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};
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#endif
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