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/*
* Copyright (C) 2006-2012 David Robillard <d@drobilla.net>
* Copyright (C) 2007-2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2007-2018 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2017 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <cassert>
#include "pbd/malign.h"
#include "pbd/stacktrace.h"
#include "ardour/audio_buffer.h"
#include "ardour/audioengine.h"
#include "ardour/audio_port.h"
#include "ardour/data_type.h"
#include "ardour/port_engine.h"
#include "ardour/rc_configuration.h"
using namespace ARDOUR;
using namespace std;
#define ENGINE AudioEngine::instance()
#define port_engine AudioEngine::instance()->port_engine()
AudioPort::AudioPort (const std::string& name, PortFlags flags)
: Port (name, DataType::AUDIO, flags)
, _buffer (new AudioBuffer (0))
, _data (0)
{
assert (name.find_first_of (':') == string::npos);
_src.setup (_resampler_quality);
_src.set_rrfilt (10);
}
AudioPort::~AudioPort ()
{
if (_data) cache_aligned_free (_data);
delete _buffer;
}
void
AudioPort::set_buffer_size (pframes_t nframes)
{
if (_data) cache_aligned_free (_data);
cache_aligned_malloc ((void**) &_data, sizeof (Sample) * lrint (floor (nframes * Config->get_max_transport_speed())));
}
void
AudioPort::cycle_start (pframes_t nframes)
{
/* caller must hold process lock */
Port::cycle_start (nframes);
if (sends_output()) {
_buffer->prepare ();
} else if (!externally_connected ()) {
/* ardour internal port, just silence input, don't resample */
// TODO reset resampler only once
_src.reset ();
memset (_data, 0, _cycle_nframes * sizeof (float));
} else {
_src.inp_data = (float*)port_engine.get_buffer (_port_handle, nframes);
_src.inp_count = nframes;
_src.out_count = _cycle_nframes;
_src.set_rratio (_cycle_nframes / (double)nframes);
_src.out_data = _data;
_src.process ();
while (_src.out_count > 0) {
*_src.out_data = _src.out_data[-1];
++_src.out_data;
--_src.out_count;
}
}
}
void
AudioPort::cycle_end (pframes_t nframes)
{
if (sends_output() && !_buffer->written() && _port_handle) {
if (!_buffer->data (0)) {
get_audio_buffer (nframes);
}
if (_buffer->capacity() >= nframes) {
_buffer->silence (nframes);
}
}
if (sends_output() && _port_handle) {
if (!externally_connected ()) {
/* ardour internal port, data goes nowhere, skip resampling */
// TODO reset resampler only once
_src.reset ();
return;
}
_src.inp_count = _cycle_nframes;
_src.out_count = nframes;
_src.set_rratio (nframes / (double)_cycle_nframes);
_src.inp_data = _data;
_src.out_data = (float*)port_engine.get_buffer (_port_handle, nframes);
_src.process ();
while (_src.out_count > 0) {
*_src.out_data = _src.out_data[-1];
++_src.out_data;
--_src.out_count;
}
}
}
void
AudioPort::cycle_split ()
{
}
AudioBuffer&
AudioPort::get_audio_buffer (pframes_t nframes)
{
/* caller must hold process lock */
assert (_port_handle);
Sample* addr;
if (!externally_connected ()) {
addr = (Sample *) port_engine.get_buffer (_port_handle, nframes);
} else {
/* _data was read and resampled as necessary in ::cycle_start */
addr = &_data[_global_port_buffer_offset];
}
_buffer->set_data (addr, nframes);
return *_buffer;
}
Sample*
AudioPort::engine_get_whole_audio_buffer ()
{
/* caller must hold process lock */
assert (_port_handle);
return (Sample *) port_engine.get_buffer (_port_handle, ENGINE->samples_per_cycle());
}
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