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/*
Copyright (C) 2006 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/buffer.h>
#include <iostream>
namespace ARDOUR {
Buffer*
Buffer::create(DataType type, size_t capacity)
{
if (type == DataType::AUDIO)
return new AudioBuffer(capacity);
else if (type == DataType::MIDI)
return new MidiBuffer(capacity);
else
return NULL;
}
AudioBuffer::AudioBuffer(size_t capacity)
: Buffer(DataType::AUDIO, capacity)
, _data(NULL)
{
_size = capacity; // For audio buffers, size = capacity (always)
if (capacity > 0) {
#ifdef NO_POSIX_MEMALIGN
_data = (Sample *) malloc(sizeof(Sample) * capacity);
#else
posix_memalign((void**)&_data, 16, sizeof(Sample) * capacity);
#endif
assert(_data);
clear();
_owns_data = true;
} else {
_owns_data = false;
}
}
AudioBuffer::~AudioBuffer()
{
if (_owns_data)
free(_data);
}
// FIXME: mirroring for MIDI buffers?
MidiBuffer::MidiBuffer(size_t capacity)
: Buffer(DataType::MIDI, capacity)
, _owns_data(true)
, _data(NULL)
{
assert(capacity > 0);
_size = capacity; // For audio buffers, size = capacity (always)
#ifdef NO_POSIX_MEMALIGN
_data = (RawMidi *) malloc(sizeof(RawMidi) * capacity);
#else
posix_memalign((void**)&_data, 16, sizeof(RawMidi) * capacity);
#endif
assert(_data);
memset(_data, 0, sizeof(RawMidi) * capacity);
}
MidiBuffer::~MidiBuffer()
{
if (_owns_data)
free(_data);
}
/** Note that offset and nframes refer to sample time, not actual buffer locations */
void
MidiBuffer::write(const Buffer& src, jack_nframes_t offset, jack_nframes_t nframes)
{
assert(src.type() == DataType::MIDI);
assert(offset == 0);
MidiBuffer& msrc = (MidiBuffer&)src;
_size = 0;
for (size_t i=0; i < msrc.size() && msrc.data()[i].time < nframes; ++i) {
assert(i < _capacity);
_data[i] = msrc.data()[i];
++_size;
}
assert(_size == msrc.size());
if (_size > 0)
std::cerr << "MidiBuffer wrote " << _size << " events.\n";
}
} // namespace ARDOUR
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