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80c3677c83
git-svn-id: svn://localhost/ardour2/branches/3.0@2991 d708f5d6-7413-0410-9779-e7cbd77b26cf
82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
/*
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Copyright (C) 2006-2007 Paul Davis
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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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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675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <ardour/audio_buffer.h>
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#include <pbd/error.h>
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#include <errno.h>
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#include "i18n.h"
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#ifdef __x86_64__
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static const int CPU_CACHE_ALIGN = 64;
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#else
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static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
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#endif
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using namespace PBD;
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namespace ARDOUR {
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AudioBuffer::AudioBuffer(size_t capacity)
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: Buffer(DataType::AUDIO, capacity)
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, _owns_data (false)
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, _data (0)
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{
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if (_capacity > 0) {
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_owns_data = true; // prevent resize() from gagging
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resize (_capacity);
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silence (_capacity);
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}
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}
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AudioBuffer::~AudioBuffer()
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{
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if (_owns_data)
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free(_data);
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}
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void
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AudioBuffer::resize (size_t size)
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{
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if (!_owns_data || (size < _capacity)) {
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return;
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}
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if (_data) {
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free (_data);
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}
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_capacity = size;
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_size = size;
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_silent = false;
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#ifdef NO_POSIX_MEMALIGN
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_data = (Sample *) malloc(sizeof(Sample) * _capacity);
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#else
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if (posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * _capacity)) {
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fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
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CPU_CACHE_ALIGN, sizeof (Sample) * _capacity, strerror (errno)) << endmsg;
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}
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#endif
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_owns_data = true;
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}
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} // namespace ARDOUR
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