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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "midirMIDIPlatformService.h"
#include "MIDILog.h"
#include "mozilla/Logging.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/MIDIPlatformRunnables.h"
#include "mozilla/dom/MIDIPort.h"
#include "mozilla/dom/MIDIPortInterface.h"
#include "mozilla/dom/MIDIPortParent.h"
#include "mozilla/dom/MIDITypes.h"
#include "mozilla/dom/MIDIUtils.h"
#include "mozilla/dom/midi/midir_impl_ffi_generated.h"
#include "mozilla/ipc/BackgroundParent.h"
#include "nsIThread.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::ipc;
static_assert(sizeof(TimeStamp) == sizeof(GeckoTimeStamp));
/**
* Runnable used for to send messages asynchronously on the I/O thread.
*/
class SendRunnable : public MIDIBackgroundRunnable {
public:
explicit SendRunnable(const nsAString& aPortID, const MIDIMessage& aMessage)
: MIDIBackgroundRunnable("SendRunnable"),
mPortID(aPortID),
mMessage(aMessage) {}
~SendRunnable() = default;
virtual void RunInternal() {
MIDIPlatformService::AssertThread();
if (!MIDIPlatformService::IsRunning()) {
// Some send operations might outlive the service, bail out and do nothing
return;
}
midirMIDIPlatformService* srv =
static_cast<midirMIDIPlatformService*>(MIDIPlatformService::Get());
srv->SendMessage(mPortID, mMessage);
}
private:
nsString mPortID;
MIDIMessage mMessage;
};
// static
StaticMutex midirMIDIPlatformService::gOwnerThreadMutex;
// static
MOZ_RUNINIT nsCOMPtr<nsISerialEventTarget>
midirMIDIPlatformService::gOwnerThread;
midirMIDIPlatformService::midirMIDIPlatformService()
: mImplementation(nullptr) {
StaticMutexAutoLock lock(gOwnerThreadMutex);
gOwnerThread = OwnerThread();
}
midirMIDIPlatformService::~midirMIDIPlatformService() {
LOG("midir_impl_shutdown");
if (mImplementation) {
midir_impl_shutdown(mImplementation);
}
StaticMutexAutoLock lock(gOwnerThreadMutex);
gOwnerThread = nullptr;
}
// static
void midirMIDIPlatformService::AddPort(const nsString* aId,
const nsString* aName, bool aInput) {
MIDIPortType type = aInput ? MIDIPortType::Input : MIDIPortType::Output;
MIDIPortInfo port(*aId, *aName, u""_ns, u""_ns, static_cast<uint32_t>(type));
MIDIPlatformService::Get()->AddPortInfo(port);
}
// static
void midirMIDIPlatformService::RemovePort(const nsString* aId,
const nsString* aName, bool aInput) {
MIDIPortType type = aInput ? MIDIPortType::Input : MIDIPortType::Output;
MIDIPortInfo port(*aId, *aName, u""_ns, u""_ns, static_cast<uint32_t>(type));
MIDIPlatformService::Get()->RemovePortInfo(port);
}
void midirMIDIPlatformService::Init() {
if (mImplementation) {
return;
}
mImplementation = midir_impl_init(AddPort);
if (mImplementation) {
MIDIPlatformService::Get()->SendPortList();
} else {
LOG("midir_impl_init failure");
}
}
// static
void midirMIDIPlatformService::CheckAndReceive(const nsString* aId,
const uint8_t* aData,
size_t aLength,
const GeckoTimeStamp* aTimeStamp,
uint64_t aMicros) {
nsTArray<uint8_t> data;
data.AppendElements(aData, aLength);
const TimeStamp* openTime = reinterpret_cast<const TimeStamp*>(aTimeStamp);
TimeStamp timestamp =
*openTime + TimeDuration::FromMicroseconds(static_cast<double>(aMicros));
MIDIMessage message(data, timestamp);
LogMIDIMessage(message, *aId, MIDIPortType::Input);
nsTArray<MIDIMessage> messages;
messages.AppendElement(message);
nsCOMPtr<nsIRunnable> r(new ReceiveRunnable(*aId, messages));
StaticMutexAutoLock lock(gOwnerThreadMutex);
if (gOwnerThread) {
gOwnerThread->Dispatch(r, NS_DISPATCH_NORMAL);
}
}
void midirMIDIPlatformService::Refresh() {
midir_impl_refresh(mImplementation, AddPort, RemovePort);
}
void midirMIDIPlatformService::Open(MIDIPortParent* aPort) {
AssertThread();
MOZ_ASSERT(aPort);
nsString id = aPort->MIDIPortInterface::Id();
TimeStamp openTimeStamp = TimeStamp::Now();
if (midir_impl_open_port(mImplementation, &id,
reinterpret_cast<GeckoTimeStamp*>(&openTimeStamp),
CheckAndReceive)) {
LOG("MIDI port open: %s at t=%lf", NS_ConvertUTF16toUTF8(id).get(),
(openTimeStamp - TimeStamp::ProcessCreation()).ToSeconds());
nsCOMPtr<nsIRunnable> r(new SetStatusRunnable(
aPort, aPort->DeviceState(), MIDIPortConnectionState::Open));
OwnerThread()->Dispatch(r.forget());
} else {
LOG("MIDI port open failed: %s", NS_ConvertUTF16toUTF8(id).get());
}
}
void midirMIDIPlatformService::Stop() {
// Nothing to do here AFAIK
}
void midirMIDIPlatformService::ScheduleSend(const nsAString& aPortId) {
AssertThread();
LOG("MIDI port schedule send %s", NS_ConvertUTF16toUTF8(aPortId).get());
nsTArray<MIDIMessage> messages;
GetMessages(aPortId, messages);
TimeStamp now = TimeStamp::Now();
for (const auto& message : messages) {
if (message.timestamp().IsNull()) {
SendMessage(aPortId, message);
} else {
double delay = (message.timestamp() - now).ToMilliseconds();
if (delay < 1.0) {
SendMessage(aPortId, message);
} else {
nsCOMPtr<nsIRunnable> r(new SendRunnable(aPortId, message));
OwnerThread()->DelayedDispatch(r.forget(),
static_cast<uint32_t>(delay));
}
}
}
}
void midirMIDIPlatformService::ScheduleClose(MIDIPortParent* aPort) {
AssertThread();
MOZ_ASSERT(aPort);
nsString id = aPort->MIDIPortInterface::Id();
LOG("MIDI port schedule close %s", NS_ConvertUTF16toUTF8(id).get());
if (aPort->ConnectionState() == MIDIPortConnectionState::Open) {
midir_impl_close_port(mImplementation, &id);
nsCOMPtr<nsIRunnable> r(new SetStatusRunnable(
aPort, aPort->DeviceState(), MIDIPortConnectionState::Closed));
OwnerThread()->Dispatch(r.forget());
}
}
void midirMIDIPlatformService::SendMessage(const nsAString& aPortId,
const MIDIMessage& aMessage) {
LOG("MIDI send message on %s", NS_ConvertUTF16toUTF8(aPortId).get());
LogMIDIMessage(aMessage, aPortId, MIDIPortType::Output);
midir_impl_send(mImplementation, &aPortId, &aMessage.data());
}
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