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livetrax/libs/backends/wavesaudio/waves_midi_device.cc
Paul Davis 1de00ab6bb new audio engine backend for native CoreAudio audio I/O, and PortMIDI for MIDI.
Code builds, runs and functions. Full code review still pending, and some possibly changes to organization of code within the backend is possible
2014-02-24 14:49:13 -05:00

269 lines
9.9 KiB
C++

/*
Copyright (C) 2014 Waves Audio Ltd.
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_midi_device.h"
#include "waves_midi_event.h"
// use non-zero latency because we want output to be timestapmed
#define LATENCY 0
#define QUEUE_LENGTH 1024
using namespace ARDOUR;
WavesMidiDevice::WavesMidiDevice (const std::string& device_name)
: _pm_input_id (pmNoDevice)
, _pm_output_id (pmNoDevice)
, _name (device_name)
, _input_queue (NULL)
, _output_queue (NULL)
, _input_pm_stream (NULL)
, _output_pm_stream (NULL)
, _incomplete_waves_midi_event (NULL)
{
validate ();
}
WavesMidiDevice::~WavesMidiDevice ()
{
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::~WavesMidiDevice ():" << name () << std::endl;
close ();
}
void
WavesMidiDevice::validate ()
{
_pm_input_id =
_pm_output_id = pmNoDevice;
int count = Pm_CountDevices ();
for (int i = 0; i < count; i++) {
const PmDeviceInfo* pm_device_info = Pm_GetDeviceInfo (i);
if (pm_device_info == NULL) {
continue;
}
if (name () == pm_device_info->name) {
if (pm_device_info->input){
_pm_input_id = i;
}
if (pm_device_info->output){
_pm_output_id = i;
}
}
}
}
int
WavesMidiDevice::open (PmTimeProcPtr time_proc, void* time_info)
{
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::open ():" << name () << std::endl;
if (is_input () && !_input_pm_stream) {
if (pmNoError != Pm_OpenInput (&_input_pm_stream,
_pm_input_id,
NULL,
1024,
time_proc,
time_info)) {
std::cerr << "WavesMidiDevice::open (): Pm_OpenInput () failed for " << _pm_input_id << "-[" << name () << "]!" << std::endl;
_input_pm_stream = NULL;
_pm_input_id = pmNoDevice;
return -1;
}
_input_queue = Pm_QueueCreate (QUEUE_LENGTH, sizeof (const WavesMidiEvent*));
if (NULL == _input_queue) {
std::cerr << "WavesMidiDevice::open (): _input_queue = Pm_QueueCreate () failed for " << _pm_input_id << "-[" << name () << "]!" << std::endl;
close ();
return -1;
}
}
if (is_output () && !_output_pm_stream) {
if (pmNoError != Pm_OpenOutput (&_output_pm_stream,
_pm_output_id,
NULL,
1024,
time_proc,
time_info,
LATENCY)) {
std::cerr << "WavesMidiDevice::open (): Pm_OpenOutput () failed for " << _pm_output_id << "-[" << name () << "]!" << std::endl;
_output_pm_stream = NULL;
_pm_output_id = pmNoDevice;
return -1;
}
_output_queue = Pm_QueueCreate (QUEUE_LENGTH, sizeof (const WavesMidiEvent*));
if (NULL == _output_queue) {
std::cerr << "WavesMidiDevice::open (): _output_queue = Pm_QueueCreate () failed for " << _pm_output_id << "-[" << name () << "]!" << std::endl;
close ();
return -1;
}
}
return 0;
}
void
WavesMidiDevice::close ()
{
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::close ():" << name () << std::endl;
WavesMidiEvent *waves_midi_event;
if (_input_pm_stream) {
Pm_Close (_input_pm_stream);
while (1 == Pm_Dequeue (_input_queue, &waves_midi_event)) {
delete waves_midi_event;
}
Pm_QueueDestroy (_input_queue);
_input_queue = NULL;
_input_pm_stream = NULL;
_pm_input_id = pmNoDevice;
}
if ( _output_pm_stream ) {
Pm_Close (_output_pm_stream);
while (1 == Pm_Dequeue (_output_queue, &waves_midi_event)) {
delete waves_midi_event;
}
Pm_QueueDestroy (_output_queue);
_output_queue = NULL;
_output_pm_stream = NULL;
_pm_output_id = pmNoDevice;
}
}
void
WavesMidiDevice::do_io ()
{
read_midi ();
write_midi ();
}
void
WavesMidiDevice::read_midi ()
{
if (NULL == _input_pm_stream) {
return;
}
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_read_midi (): " << _pm_device_id << "-[" << name () << "]" << std::endl;
while (Pm_Poll (_input_pm_stream) > 0) {
PmEvent pm_event; // just one message at a time
int result = Pm_Read (_input_pm_stream, &pm_event, 1);
if (result < 0) {
std::cerr << "WavesMidiDevice::_read_midi (): Pm_Read () failed (" << result << ") for [" << name () << "]!" << std::endl;
break;
}
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_read_midi (): " << _pm_device_id << "-[" << name () << "] evt-tm:" << pm_event.timestamp << std::endl;
if (_incomplete_waves_midi_event == NULL ) {
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_read_midi (): " << _pm_device_id << "-[" << name () << "] : new _incomplete_waves_midi_event" << std::endl;
_incomplete_waves_midi_event = new WavesMidiEvent (pm_event.timestamp);
}
WavesMidiEvent *nested_pm_event = _incomplete_waves_midi_event->append_data (pm_event);
if (nested_pm_event) {
Pm_Enqueue (_input_queue, &nested_pm_event);
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_read_midi (): " << _pm_device_id << "-[" << name () << "] : Pm_Enqueue (_input_queue, nested_pm_event)" << std::endl;
}
switch ( _incomplete_waves_midi_event->state ()) {
case WavesMidiEvent::BROKEN:
delete _incomplete_waves_midi_event;
_incomplete_waves_midi_event = NULL;
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_read_midi (): " << _pm_device_id << "-[" << name () << "] : case WavesMidiEvent::BROKEN:" << std::endl;
break;
case WavesMidiEvent::COMPLETE:
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_read_midi (): " << _pm_device_id << "-[" << name () << "] : Pm_Enqueue (_input_queue, _incomplete_waves_midi_event); " << std::hex << (void*)_incomplete_waves_midi_event << std::dec << std::endl;
Pm_Enqueue (_input_queue, &_incomplete_waves_midi_event);
_incomplete_waves_midi_event = NULL;
break;
default:
break;
}
}
}
void
WavesMidiDevice::write_midi ()
{
if (NULL == _output_pm_stream) {
return;
}
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_write_midi (): " << _pm_device_id << "-[" << name () << "]" << std::endl;
PmError err;
WavesMidiEvent *waves_midi_event;
while (1 == Pm_Dequeue (_output_queue, &waves_midi_event)) {
if (waves_midi_event->sysex ()) {
// LATENCY compensation
err = Pm_WriteSysEx (_output_pm_stream, waves_midi_event->timestamp () - LATENCY, waves_midi_event->data ());
if (0 > err) {
std::cout << "WavesMidiDevice::write_event_to_device (): [" << name () << "] Pm_WriteSysEx () failed (" << err << ")!" << std::endl;
};
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_write_midi (): SYSEX used, ev->tm:" << waves_midi_event->timestamp () - LATENCY << std::endl;
}
else
{
err = Pm_WriteShort (_output_pm_stream, waves_midi_event->timestamp () - LATENCY, * (PmMessage*)waves_midi_event->data ());
if (0 > err) {
std::cout << "WavesMidiDevice::write_event_to_device (): [" << name () << "] Pm_WriteShort () failed (" << err << ")!" << std::endl;
}
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::_write_midi (): SHORTMSG used, ev->tm:" << waves_midi_event->timestamp () - LATENCY << std::endl;
}
delete waves_midi_event;
}
return;
}
int
WavesMidiDevice::enqueue_output_waves_midi_event (const WavesMidiEvent* waves_midi_event)
{
// COMMENTED DBG LOGS */ std::cout << "WavesMidiDevice::enqueue_output_waves_midi_event (): " << _pm_device_id << "-[" << name () << "]" << std::endl;
if (waves_midi_event == NULL) {
std::cerr << "WavesMidiDevice::put_event_to_callback (): 'waves_midi_event' is NULL!" << std::endl;
return -1;
}
PmError err = Pm_Enqueue (_output_queue, &waves_midi_event);
if (0 > err) {
std::cerr << "WavesMidiDevice::put_event_to_callback (): Pm_Enqueue () failed (" << err << ")!" << std::endl;
return -1;
};
return 0;
}
WavesMidiEvent*
WavesMidiDevice::dequeue_input_waves_midi_event ()
{
WavesMidiEvent* waves_midi_event;
if (Pm_Dequeue (_input_queue, &waves_midi_event) == 1) {
return waves_midi_event;
}
return NULL;
}