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/*
Copyright (C) 2006-2007 Paul Davis
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ardour/audio_buffer.h>
#ifdef __x86_64__
static const int CPU_CACHE_ALIGN = 64;
#else
static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
#endif
namespace ARDOUR {
AudioBuffer::AudioBuffer(size_t capacity)
: Buffer(DataType::AUDIO, capacity)
, _owns_data (false)
, _data (0)
{
if (_capacity > 0) {
_owns_data = true; // prevent resize() from gagging
resize (_capacity);
silence (_capacity);
}
}
AudioBuffer::~AudioBuffer()
{
if (_owns_data)
free(_data);
}
void
AudioBuffer::resize (size_t size)
{
if (!_owns_data || (size < _capacity)) {
return;
}
if (_data) {
free (_data);
}
_capacity = size;
_size = size;
_silent = false;
#ifdef NO_POSIX_MEMALIGN
_data = (Sample *) malloc(sizeof(Sample) * _capacity);
#else
posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * _capacity);
#endif
_owns_data = true;
}
} // namespace ARDOUR
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