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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 <cassert>
#include <ardour/audio_port.h>
#include <ardour/audioengine.h>
#include <ardour/data_type.h>
#include <ardour/audio_buffer.h>
using namespace ARDOUR;
using namespace std;
AudioPort::AudioPort (const std::string& name, Flags flags)
: Port (name, DataType::AUDIO, flags)
, _buffer_data_set (false)
, _buffer (new AudioBuffer (0))
{
assert (name.find_first_of (':') == string::npos);
}
AudioPort::~AudioPort ()
{
delete _buffer;
}
void
AudioPort::cycle_start (nframes_t nframes, nframes_t offset)
{
/* caller must hold process lock */
/* get_buffer() must only be run on outputs here in cycle_start().
Inputs must be done in the correct processing order, which
requires interleaving with route processing. that will
happen when Port::get_buffer() is called.
*/
if (sends_output() && !_buffer_data_set) {
_buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes) + offset, nframes);
_buffer_data_set = true;
}
if (receives_input()) {
_buffer_data_set = false;
} else {
_buffer->silence (nframes, offset);
}
}
AudioBuffer &
AudioPort::get_audio_buffer (nframes_t nframes, nframes_t offset)
{
/* caller must hold process lock */
if (receives_input () && !_buffer_data_set) {
_buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes) + offset, nframes);
}
return *_buffer;
}
void
AudioPort::cycle_end (nframes_t nframes, nframes_t offset)
{
_buffer_data_set = false;
}
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