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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 (new AudioBuffer (0))
{
assert (name.find_first_of (':') == string::npos);
}
AudioPort::~AudioPort ()
{
delete _buffer;
}
void
AudioPort::cycle_start (nframes_t nframes)
{
/* 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()) {
/* Notice that cycle_start() is always run with the *entire* process cycle frame count,
so we do not bother to apply _port_offset here - we always want the address of the
entire JACK port buffer. We are not collecting data here - just noting the
address where we will write data later in the process cycle.
*/
_buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes), nframes);
_buffer->prepare ();
}
}
void
AudioPort::cycle_end (nframes_t nframes)
{
if (sends_output() && !_buffer->written()) {
_buffer->silence (nframes);
}
}
void
AudioPort::cycle_split ()
{
}
AudioBuffer&
AudioPort::get_audio_buffer (nframes_t nframes, nframes_t offset)
{
/* caller must hold process lock */
if (receives_input ()) {
/* Get a pointer to the audio data @ offset + _port_offset within the JACK port buffer and store
it in our _buffer member.
Note that offset is expected to be zero in almost all cases.
*/
_buffer->set_data ((Sample *) jack_port_get_buffer (_jack_port, nframes) + offset + _port_offset, nframes);
}
/* output ports set their _buffer data information during ::cycle_start()
*/
return *_buffer;
}
size_t
AudioPort::raw_buffer_size(nframes_t nframes) const
{
return nframes * sizeof(float);
}
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