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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"
#include "pbd/error.h"
#include <errno.h>
#include "i18n.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
using namespace PBD;
using 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);
_silent = false; // force silence on the intial buffer state
silence (_capacity);
}
}
AudioBuffer::~AudioBuffer()
{
if (_owns_data)
free(_data);
}
/* called to replace a pointer to an external buffer (e.g. JACK) with
buffer-owned memory.
*/
void
AudioBuffer::replace_data (size_t capacity)
{
_owns_data = true;
_data = 0;
_capacity = 0; // force reallocation
resize (capacity);
}
void
AudioBuffer::resize (size_t size)
{
if (!_owns_data) {
return;
}
if (size < _capacity) {
_size = size;
return;
}
if (_data) {
free (_data);
}
_capacity = size;
_size = size;
_silent = false;
#ifdef NO_POSIX_MEMALIGN
_data = (Sample *) malloc(sizeof(Sample) * _capacity);
#else
if (posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * _capacity)) {
fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
CPU_CACHE_ALIGN, sizeof (Sample) * _capacity, strerror (errno)) << endmsg;
}
#endif
}
void
AudioBuffer::copy_to_internal (Sample* p, nframes_t cnt, nframes_t offset)
{
memcpy (_data + offset, p, sizeof(Sample*) * cnt);
}
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