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livetrax/libs/backends/wavesaudio/waves_audioport.cc

62 lines
2.0 KiB
C++

/*
Copyright (C) 2013 Valeriy Kamyshniy
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 "waves_audioport.h"
using namespace ARDOUR;
WavesAudioPort::WavesAudioPort (const std::string& port_name, PortFlags flags)
: WavesDataPort (port_name, flags)
{
memset (_buffer, 0, sizeof (_buffer));
}
void* WavesAudioPort::get_buffer (pframes_t nframes)
{
if (is_input ()) {
std::vector<WavesDataPort*>::const_iterator it = get_connections ().begin ();
if (it != get_connections ().end ()) {
/* In fact, the static casting to (const WavesAudioPort*) is not that safe.
* However, mixing the buffers is assumed in the time critical conditions.
* Base class WavesDataPort takes is supposed to provide enough consistentcy
* of the connections.
*/
for (memcpy (_buffer, ((const WavesAudioPort*)*it)->const_buffer (), nframes * sizeof (Sample)), ++it;
it != get_connections ().end ();
++it) {
Sample* tgt = buffer ();
const Sample* src = ((const WavesAudioPort*)*it)->const_buffer ();
for (uint32_t frame = 0; frame < nframes; ++frame, ++tgt, ++src) {
*tgt += *src;
}
}
}
}
return _buffer;
}
void
WavesAudioPort::_wipe_buffer()
{
memset (_buffer, 0, sizeof (_buffer));
}