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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 <errno.h>
#include "ardour/audio_buffer.h"
#include "pbd/error.h"
#include "pbd/malign.h"
#include "i18n.h"
using namespace PBD;
using namespace ARDOUR;
AudioBuffer::AudioBuffer(size_t capacity)
: Buffer (DataType::AUDIO)
, _owns_data (false)
, _data (0)
{
if (capacity) {
_owns_data = true; // prevent resize() from gagging
resize (capacity);
_silent = false; // force silence on the intial buffer state
clear ();
}
}
AudioBuffer::~AudioBuffer()
{
if (_owns_data)
free(_data);
}
void
AudioBuffer::resize (size_t size)
{
if (!_owns_data) {
/* XXX how the hell is this enforced? */
_capacity = size;
return;
}
if (_data && size < _capacity) {
/* buffer is already large enough */
if (size < _size) {
/* truncate */
_size = size;
}
return;
}
free (_data);
cache_aligned_malloc ((void**) &_data, sizeof (Sample) * size);
_capacity = size;
_size = 0;
_silent = false;
}
bool
AudioBuffer::check_silence (pframes_t nframes, pframes_t& n) const
{
for (n = 0; n < _size && n < nframes; ++n) {
if (_data[n] != Sample (0)) {
return false;
}
}
return true;
}
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