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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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/. */
#ifndef mozilla_dom_midirMIDIPlatformService_h
#define mozilla_dom_midirMIDIPlatformService_h
#include "mozilla/StaticMutex.h"
#include "mozilla/dom/MIDIPlatformService.h"
#include "mozilla/dom/MIDITypes.h"
#include "mozilla/dom/midi/midir_impl_ffi_generated.h"
class nsIThread;
struct MidirWrapper;
namespace mozilla::dom {
class MIDIPortInterface;
/**
* Platform service implementation using the midir crate.
*/
class midirMIDIPlatformService : public MIDIPlatformService {
public:
midirMIDIPlatformService();
virtual void Init() override;
virtual void Refresh() override;
virtual void Open(MIDIPortParent* aPort) override;
virtual void Stop() override;
virtual void ScheduleSend(const nsAString& aPort) override;
virtual void ScheduleClose(MIDIPortParent* aPort) override;
void SendMessage(const nsAString& aPort, const MIDIMessage& aMessage);
private:
virtual ~midirMIDIPlatformService();
static void AddPort(const nsString* aId, const nsString* aName, bool aInput);
static void RemovePort(const nsString* aId, const nsString* aName,
bool aInput);
static void CheckAndReceive(const nsString* aId, const uint8_t* aData,
size_t aLength, const GeckoTimeStamp* aTimeStamp,
uint64_t aMicros);
// Wrapper around the midir Rust implementation.
MidirWrapper* mImplementation;
// The midir backends can invoke CheckAndReceive on arbitrary background
// threads, and so we dispatch events from there to the owner task queue.
// It's a little ambiguous whether midir can ever invoke CheckAndReceive
// on one of its platform-specific background threads after we've dropped
// the main instance. Just in case, we use a static mutex to avoid a potential
// race with dropping the primary reference to the task queue via
// ClearOnShutdown.
static StaticMutex gOwnerThreadMutex;
static nsCOMPtr<nsISerialEventTarget> gOwnerThread
MOZ_GUARDED_BY(gOwnerThreadMutex);
};
} // namespace mozilla::dom
#endif // mozilla_dom_midirMIDIPlatformService_h
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