147 lines
3.7 KiB
C++
147 lines
3.7 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cassert>
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#include "pbd/malign.h"
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#include "pbd/stacktrace.h"
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#include "ardour/audio_buffer.h"
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#include "ardour/audioengine.h"
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#include "ardour/audio_port.h"
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#include "ardour/data_type.h"
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#include "ardour/port_engine.h"
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using namespace ARDOUR;
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using namespace std;
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#define ENGINE AudioEngine::instance()
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#define port_engine AudioEngine::instance()->port_engine()
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AudioPort::AudioPort (const std::string& name, PortFlags flags)
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: Port (name, DataType::AUDIO, flags)
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, _buffer (new AudioBuffer (0))
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{
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assert (name.find_first_of (':') == string::npos);
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cache_aligned_malloc ((void**) &_data, sizeof (Sample) * 8192);
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_src.setup (_resampler_quality);
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_src.set_rrfilt (10);
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}
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AudioPort::~AudioPort ()
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{
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cache_aligned_free (_data);
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delete _buffer;
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}
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void
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AudioPort::cycle_start (pframes_t nframes)
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{
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/* caller must hold process lock */
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Port::cycle_start (nframes);
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if (sends_output()) {
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_buffer->prepare ();
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} else if (!externally_connected ()) {
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/* ardour internal port, just silence input, don't resample */
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// TODO reset resampler only once
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_src.reset ();
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memset (_data, 0, _cycle_nframes * sizeof (float));
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} else {
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_src.inp_data = (float*)port_engine.get_buffer (_port_handle, nframes);
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_src.inp_count = nframes;
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_src.out_count = _cycle_nframes;
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_src.set_rratio (_cycle_nframes / (double)nframes);
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_src.out_data = _data;
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_src.process ();
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while (_src.out_count > 0) {
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*_src.out_data = _src.out_data[-1];
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++_src.out_data;
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--_src.out_count;
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}
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}
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}
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void
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AudioPort::cycle_end (pframes_t nframes)
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{
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if (sends_output() && !_buffer->written() && _port_handle) {
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if (!_buffer->data (0)) {
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get_audio_buffer (nframes);
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}
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if (_buffer->capacity() >= nframes) {
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_buffer->silence (nframes);
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}
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}
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if (sends_output() && _port_handle) {
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if (!externally_connected ()) {
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/* ardour internal port, data goes nowhere, skip resampling */
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// TODO reset resampler only once
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_src.reset ();
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return;
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}
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_src.inp_count = _cycle_nframes;
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_src.out_count = nframes;
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_src.set_rratio (nframes / (double)_cycle_nframes);
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_src.inp_data = _data;
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_src.out_data = (float*)port_engine.get_buffer (_port_handle, nframes);
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_src.process ();
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while (_src.out_count > 0) {
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*_src.out_data = _src.out_data[-1];
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++_src.out_data;
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--_src.out_count;
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}
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}
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}
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void
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AudioPort::cycle_split ()
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{
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}
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AudioBuffer&
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AudioPort::get_audio_buffer (pframes_t nframes)
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{
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/* caller must hold process lock */
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assert (_port_handle);
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Sample* addr;
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if (!externally_connected ()) {
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addr = (Sample *) port_engine.get_buffer (_port_handle, nframes);
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} else {
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/* _data was read and resampled as necessary in ::cycle_start */
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addr = &_data[_global_port_buffer_offset];
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}
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_buffer->set_data (addr, nframes);
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return *_buffer;
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}
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Sample*
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AudioPort::engine_get_whole_audio_buffer ()
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{
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/* caller must hold process lock */
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assert (_port_handle);
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return (Sample *) port_engine.get_buffer (_port_handle, ENGINE->samples_per_cycle());
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}
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