97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
/*
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* Copyright (C) 2007-2010 David Robillard <d@drobilla.net>
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* Copyright (C) 2007-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2013-2014 Robin Gareus <robin@gareus.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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#include <errno.h>
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#include "ardour/audio_buffer.h"
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#include "pbd/error.h"
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#include "pbd/malign.h"
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#include "pbd/i18n.h"
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using namespace PBD;
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using namespace ARDOUR;
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AudioBuffer::AudioBuffer(size_t capacity)
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: Buffer (DataType::AUDIO)
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, _owns_data (false)
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, _data (0)
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{
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if (capacity) {
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_owns_data = true; // prevent resize() from gagging
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resize (capacity);
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_silent = false; // force silence on the initial buffer state
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clear ();
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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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cache_aligned_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) {
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/* XXX how the hell is this enforced? */
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_capacity = size;
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return;
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}
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if (_data && size < _capacity) {
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/* buffer is already large enough */
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return;
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}
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cache_aligned_free (_data);
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cache_aligned_malloc ((void**) &_data, sizeof (Sample) * size);
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_capacity = size;
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_silent = false;
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}
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bool
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AudioBuffer::check_silence (pframes_t nframes, pframes_t& n) const
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{
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for (n = 0; n < nframes; ++n) {
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if (_data[n] != Sample (0)) {
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return false;
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}
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}
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return true;
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}
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void
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AudioBuffer::silence (samplecnt_t len, samplecnt_t offset) {
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if (!_silent) {
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assert(_capacity > 0);
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assert(offset + len <= _capacity);
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memset(_data + offset, 0, sizeof (Sample) * len);
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if (len == _capacity) {
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_silent = true;
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}
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}
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_written = true;
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}
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