MidiInCoreMIDI.cc

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#if defined(__APPLE__)
 
#include "MidiInCoreMIDI.hh"
#include "MidiInConnector.hh"
#include "PluggingController.hh"
#include "PlugException.hh"
#include "EventDistributor.hh"
#include "Scheduler.hh"
#include "serialize.hh"
#include "StringOp.hh"
#include "xrange.hh"
#include <mach/mach_time.h>
#include <memory>
 
 
namespace openmsx {
 
// MidiInCoreMIDI ===========================================================
 
void MidiInCoreMIDI::registerAll(EventDistributor& eventDistributor,
                                 Scheduler& scheduler,
                                 PluggingController& controller)
{
        for (auto i : xrange(MIDIGetNumberOfSources())) {
                if (MIDIEndpointRef endpoint = MIDIGetSource(i)) {
                        controller.registerPluggable(std::make_unique<MidiInCoreMIDI>(
                                        eventDistributor, scheduler, endpoint));
                }
        }
}
 
MidiInCoreMIDI::MidiInCoreMIDI(EventDistributor& eventDistributor_,
                               Scheduler& scheduler_, MIDIEndpointRef endpoint_)
        : eventDistributor(eventDistributor_)
        , scheduler(scheduler_)
        , endpoint(endpoint_)
{
        // Get a user-presentable name for the endpoint.
        CFStringRef midiDeviceName;
        OSStatus status = MIDIObjectGetStringProperty(
                                                endpoint, kMIDIPropertyDisplayName, &midiDeviceName);
        if (status) {
                status = MIDIObjectGetStringProperty(
                                                endpoint, kMIDIPropertyName, &midiDeviceName);
        }
        if (status) {
                name = "Nameless endpoint";
        } else {
                name = strCat(StringOp::fromCFString(midiDeviceName), " IN");
                CFRelease(midiDeviceName);
        }
 
        eventDistributor.registerEventListener(
                        EventType::MIDI_IN_COREMIDI, *this);
}
 
MidiInCoreMIDI::~MidiInCoreMIDI()
{
        eventDistributor.unregisterEventListener(
                        EventType::MIDI_IN_COREMIDI, *this);
}
 
void MidiInCoreMIDI::plugHelper(Connector& /*connector*/, EmuTime::param /*time*/)
{
        // Create client.
        if (OSStatus status = MIDIClientCreate(
                        CFSTR("openMSX"), nullptr, nullptr, &client)) {
                throw PlugException("Failed to create MIDI client (", status, ')');
        }
        // Create input port.
        if (OSStatus status = MIDIInputPortCreate(
                        client, CFSTR("Input"), sendPacketList, this, &port)) {
                MIDIClientDispose(client);
                client = 0;
                throw PlugException("Failed to create MIDI port (", status, ')');
        }
 
        MIDIPortConnectSource(port, endpoint, nullptr);
}
 
void MidiInCoreMIDI::unplugHelper(EmuTime::param /*time*/)
{
        // Dispose of the client; this automatically disposes of the port as well.
        if (OSStatus status = MIDIClientDispose(client)) {
                fprintf(stderr, "Failed to dispose of MIDI client (%d)\n", int(status));
        }
        port = 0;
        client = 0;
}
 
std::string_view MidiInCoreMIDI::getName() const
{
        return name;
}
 
std::string_view MidiInCoreMIDI::getDescription() const
{
        return "Receives MIDI events from an existing CoreMIDI source.";
}
 
void MidiInCoreMIDI::sendPacketList(const MIDIPacketList *packetList,
                                    void *readProcRefCon, void *srcConnRefCon)
{
        static_cast<MidiInCoreMIDI*>(readProcRefCon)
                        ->sendPacketList(packetList, srcConnRefCon);
}
 
void MidiInCoreMIDI::sendPacketList(const MIDIPacketList *packetList,
                                    void * /*srcConnRefCon*/) {
        {
                std::scoped_lock lock(mutex);
                const MIDIPacket* packet = &packetList->packet[0];
                repeat(packetList->numPackets, [&] {
                        for (auto j : xrange(packet->length)) {
                                queue.push_back(packet->data[j]);
                        }
                        packet = MIDIPacketNext(packet);
                });
        }
        eventDistributor.distributeEvent(MidiInCoreMidiEvent());
}
 
// MidiInDevice
void MidiInCoreMIDI::signal(EmuTime::param time)
{
        auto connector = static_cast<MidiInConnector*>(getConnector());
        if (!connector->acceptsData()) {
                std::scoped_lock lock(mutex);
                queue.clear();
                return;
        }
        if (!connector->ready()) {
                return;
        }
 
        byte data;
        {
                std::scoped_lock lock(mutex);
                if (queue.empty()) return;
                data = queue.pop_front();
        }
        connector->recvByte(data, time);
}
 
// EventListener
bool MidiInCoreMIDI::signalEvent(const Event& /*event*/)
{
        if (isPluggedIn()) {
                signal(scheduler.getCurrentTime());
        } else {
                std::scoped_lock lock(mutex);
                queue.clear();
        }
        return false;
}
 
template<typename Archive>
void MidiInCoreMIDI::serialize(Archive& /*ar*/, unsigned /*version*/)
{
}
INSTANTIATE_SERIALIZE_METHODS(MidiInCoreMIDI);
REGISTER_POLYMORPHIC_INITIALIZER(Pluggable, MidiInCoreMIDI, "MidiInCoreMIDI");
 
 
// MidiInCoreMIDIVirtual ====================================================
 
MidiInCoreMIDIVirtual::MidiInCoreMIDIVirtual(EventDistributor& eventDistributor_,
                                             Scheduler& scheduler_)
        : eventDistributor(eventDistributor_)
        , scheduler(scheduler_)
        , client(0)
        , endpoint(0)
{
        eventDistributor.registerEventListener(
                        EventType::MIDI_IN_COREMIDI_VIRTUAL, *this);
}
 
MidiInCoreMIDIVirtual::~MidiInCoreMIDIVirtual()
{
        eventDistributor.unregisterEventListener(
                        EventType::MIDI_IN_COREMIDI_VIRTUAL, *this);
}
 
void MidiInCoreMIDIVirtual::plugHelper(Connector& /*connector*/,
                                       EmuTime::param /*time*/)
{
        // Create client.
        if (OSStatus status = MIDIClientCreate(CFSTR("openMSX"),
                                               nullptr, nullptr, &client)) {
                throw PlugException("Failed to create MIDI client (", status, ')');
        }
        // Create endpoint.
        if (OSStatus status = MIDIDestinationCreate(client, CFSTR("openMSX"),
                                                    sendPacketList, this,
                                                    &endpoint)) {
                MIDIClientDispose(client);
                throw PlugException("Failed to create MIDI endpoint (", status, ')');
        }
}
 
void MidiInCoreMIDIVirtual::unplugHelper(EmuTime::param /*time*/)
{
        if (OSStatus status = MIDIEndpointDispose(endpoint)) {
                fprintf(stderr, "Failed to dispose of MIDI port (%d)\n", int(status));
        }
        endpoint = 0;
        if (OSStatus status = MIDIClientDispose(client)) {
                fprintf(stderr, "Failed to dispose of MIDI client (%d)\n", int(status));
        }
        client = 0;
}
 
std::string_view MidiInCoreMIDIVirtual::getName() const
{
        return "Virtual IN";
}
 
std::string_view MidiInCoreMIDIVirtual::getDescription() const
{
        return "Sends MIDI events from a newly created CoreMIDI virtual source.";
}
 
void MidiInCoreMIDIVirtual::sendPacketList(const MIDIPacketList *packetList,
                                           void *readProcRefCon,
                                           void *srcConnRefCon)
{
        static_cast<MidiInCoreMIDIVirtual*>(readProcRefCon)
                        ->sendPacketList(packetList, srcConnRefCon);
}
 
void MidiInCoreMIDIVirtual::sendPacketList(const MIDIPacketList *packetList,
                                           void * /*srcConnRefCon*/)
{
        {
                std::scoped_lock lock(mutex);
                const MIDIPacket* packet = &packetList->packet[0];
                repeat(packetList->numPackets, [&] {
                        for (auto j : xrange(packet->length)) {
                                queue.push_back(packet->data[j]);
                        }
                        packet = MIDIPacketNext(packet);
                });
        }
        eventDistributor.distributeEvent(MidiInCoreMidiVirtualEvent());
}
 
// MidiInDevice
void MidiInCoreMIDIVirtual::signal(EmuTime::param time)
{
        auto connector = static_cast<MidiInConnector*>(getConnector());
        if (!connector->acceptsData()) {
                std::scoped_lock lock(mutex);
                queue.clear();
                return;
        }
        if (!connector->ready()) {
                return;
        }
 
        byte data;
        {
                std::scoped_lock lock(mutex);
                if (queue.empty()) return;
                data = queue.pop_front();
        }
        connector->recvByte(data, time);
}
 
// EventListener
bool MidiInCoreMIDIVirtual::signalEvent(const Event& /*event*/)
{
        if (isPluggedIn()) {
                signal(scheduler.getCurrentTime());
        } else {
                std::scoped_lock lock(mutex);
                queue.clear();
        }
        return false;
}
 
template<typename Archive>
void MidiInCoreMIDIVirtual::serialize(Archive& /*ar*/, unsigned /*version*/)
{
}
INSTANTIATE_SERIALIZE_METHODS(MidiInCoreMIDIVirtual);
REGISTER_POLYMORPHIC_INITIALIZER(Pluggable, MidiInCoreMIDIVirtual, "MidiInCoreMIDIVirtual");
 
} // namespace openmsx
 
#endif // defined(__APPLE__)