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livetrax/libs/backends/portaudio/winmmemidi_io.cc

298 lines
6.5 KiB
C++

/*
* Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
*
* 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 <windows.h>
#include <mmsystem.h>
#include <sstream>
#include "pbd/error.h"
#include "pbd/compose.h"
#include "pbd/windows_timer_utils.h"
#include "winmmemidi_io.h"
#include "debug.h"
#include "i18n.h"
using namespace ARDOUR;
WinMMEMidiIO::WinMMEMidiIO()
: m_active (false)
, m_enabled (true)
, m_run (false)
, m_changed_callback (0)
, m_changed_arg (0)
{
pthread_mutex_init (&m_device_lock, 0);
}
WinMMEMidiIO::~WinMMEMidiIO()
{
pthread_mutex_lock (&m_device_lock);
cleanup();
pthread_mutex_unlock (&m_device_lock);
pthread_mutex_destroy (&m_device_lock);
}
void
WinMMEMidiIO::cleanup()
{
DEBUG_MIDI ("MIDI cleanup\n");
m_active = false;
destroy_input_devices ();
destroy_output_devices ();
}
bool
WinMMEMidiIO::dequeue_input_event (uint32_t port,
uint64_t timestamp_start,
uint64_t timestamp_end,
uint64_t &timestamp,
uint8_t *d,
size_t &s)
{
if (!m_active) {
return false;
}
assert(port < m_inputs.size());
// m_inputs access should be protected by trylock
return m_inputs[port]->dequeue_midi_event (
timestamp_start, timestamp_end, timestamp, d, s);
}
bool
WinMMEMidiIO::enqueue_output_event (uint32_t port,
uint64_t timestamp,
const uint8_t *d,
const size_t s)
{
if (!m_active) {
return false;
}
assert(port < m_outputs.size());
// m_outputs access should be protected by trylock
return m_outputs[port]->enqueue_midi_event (timestamp, d, s);
}
std::string
WinMMEMidiIO::port_id (uint32_t port, bool input)
{
std::stringstream ss;
if (input) {
ss << "system:midi_capture_";
ss << port;
} else {
ss << "system:midi_playback_";
ss << port;
}
return ss.str();
}
std::string
WinMMEMidiIO::port_name (uint32_t port, bool input)
{
if (input) {
if (port < m_inputs.size ()) {
return m_inputs[port]->name ();
}
} else {
if (port < m_outputs.size ()) {
return m_outputs[port]->name ();
}
}
return "";
}
void
WinMMEMidiIO::start ()
{
if (m_run) {
DEBUG_MIDI ("MIDI driver already started\n");
return;
}
m_run = true;
DEBUG_MIDI ("Starting MIDI driver\n");
PBD::MMTIMERS::set_min_resolution();
discover();
start_devices ();
}
void
WinMMEMidiIO::stop ()
{
if (!m_run) {
DEBUG_MIDI ("MIDI driver already stopped\n");
return;
}
DEBUG_MIDI ("Stopping MIDI driver\n");
m_run = false;
stop_devices ();
pthread_mutex_lock (&m_device_lock);
cleanup ();
pthread_mutex_unlock (&m_device_lock);
PBD::MMTIMERS::reset_resolution();
}
void
WinMMEMidiIO::start_devices ()
{
for (std::vector<WinMMEMidiInputDevice*>::iterator i = m_inputs.begin ();
i < m_inputs.end();
++i) {
if (!(*i)->start ()) {
PBD::error << string_compose (_("Unable to start MIDI input device %1\n"),
(*i)->name ()) << endmsg;
}
}
for (std::vector<WinMMEMidiOutputDevice*>::iterator i = m_outputs.begin ();
i < m_outputs.end();
++i) {
if (!(*i)->start ()) {
PBD::error << string_compose (_ ("Unable to start MIDI output device %1\n"),
(*i)->name ()) << endmsg;
}
}
}
void
WinMMEMidiIO::stop_devices ()
{
for (std::vector<WinMMEMidiInputDevice*>::iterator i = m_inputs.begin ();
i < m_inputs.end();
++i) {
if (!(*i)->stop ()) {
PBD::error << string_compose (_ ("Unable to stop MIDI input device %1\n"),
(*i)->name ()) << endmsg;
}
}
for (std::vector<WinMMEMidiOutputDevice*>::iterator i = m_outputs.begin ();
i < m_outputs.end();
++i) {
if (!(*i)->stop ()) {
PBD::error << string_compose (_ ("Unable to stop MIDI output device %1\n"),
(*i)->name ()) << endmsg;
}
}
}
void
WinMMEMidiIO::create_input_devices ()
{
int srcCount = midiInGetNumDevs ();
DEBUG_MIDI (string_compose ("MidiIn count: %1\n", srcCount));
for (int i = 0; i < srcCount; ++i) {
try {
WinMMEMidiInputDevice* midi_input = new WinMMEMidiInputDevice (i);
if (midi_input) {
m_inputs.push_back (midi_input);
}
}
catch (...) {
DEBUG_MIDI ("Unable to create MIDI input\n");
continue;
}
}
}
void
WinMMEMidiIO::create_output_devices ()
{
int dstCount = midiOutGetNumDevs ();
DEBUG_MIDI (string_compose ("MidiOut count: %1\n", dstCount));
for (int i = 0; i < dstCount; ++i) {
try {
WinMMEMidiOutputDevice* midi_output = new WinMMEMidiOutputDevice(i);
if (midi_output) {
m_outputs.push_back(midi_output);
}
} catch(...) {
DEBUG_MIDI ("Unable to create MIDI output\n");
continue;
}
}
}
void
WinMMEMidiIO::destroy_input_devices ()
{
while (!m_inputs.empty ()) {
WinMMEMidiInputDevice* midi_input = m_inputs.back ();
// assert(midi_input->stopped ());
m_inputs.pop_back ();
delete midi_input;
}
}
void
WinMMEMidiIO::destroy_output_devices ()
{
while (!m_outputs.empty ()) {
WinMMEMidiOutputDevice* midi_output = m_outputs.back ();
// assert(midi_output->stopped ());
m_outputs.pop_back ();
delete midi_output;
}
}
void
WinMMEMidiIO::discover()
{
if (!m_run) {
return;
}
if (pthread_mutex_trylock (&m_device_lock)) {
return;
}
cleanup ();
create_input_devices ();
create_output_devices ();
if (!(m_inputs.size () || m_outputs.size ())) {
DEBUG_MIDI ("No midi inputs or outputs\n");
pthread_mutex_unlock (&m_device_lock);
return;
}
DEBUG_MIDI (string_compose ("Discovered %1 inputs and %2 outputs\n",
m_inputs.size (),
m_outputs.size ()));
if (m_changed_callback) {
m_changed_callback(m_changed_arg);
}
m_active = true;
pthread_mutex_unlock (&m_device_lock);
}