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65 lines
2.4 KiB
C++
65 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_midirMIDIPlatformService_h
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#define mozilla_dom_midirMIDIPlatformService_h
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#include "mozilla/StaticMutex.h"
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#include "mozilla/dom/MIDIPlatformService.h"
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#include "mozilla/dom/MIDITypes.h"
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#include "mozilla/dom/midi/midir_impl_ffi_generated.h"
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class nsIThread;
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struct MidirWrapper;
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namespace mozilla::dom {
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class MIDIPortInterface;
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/**
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* Platform service implementation using the midir crate.
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*/
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class midirMIDIPlatformService : public MIDIPlatformService {
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public:
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midirMIDIPlatformService();
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virtual void Init() override;
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virtual void Refresh() override;
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virtual void Open(MIDIPortParent* aPort) override;
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virtual void Stop() override;
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virtual void ScheduleSend(const nsAString& aPort) override;
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virtual void ScheduleClose(MIDIPortParent* aPort) override;
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void SendMessage(const nsAString& aPort, const MIDIMessage& aMessage);
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private:
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virtual ~midirMIDIPlatformService();
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static void AddPort(const nsString* aId, const nsString* aName, bool aInput);
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static void RemovePort(const nsString* aId, const nsString* aName,
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bool aInput);
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static void CheckAndReceive(const nsString* aId, const uint8_t* aData,
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size_t aLength, const GeckoTimeStamp* aTimeStamp,
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uint64_t aMicros);
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// Wrapper around the midir Rust implementation.
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MidirWrapper* mImplementation;
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// The midir backends can invoke CheckAndReceive on arbitrary background
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// threads, and so we dispatch events from there to the owner task queue.
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// It's a little ambiguous whether midir can ever invoke CheckAndReceive
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// on one of its platform-specific background threads after we've dropped
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// the main instance. Just in case, we use a static mutex to avoid a potential
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// race with dropping the primary reference to the task queue via
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// ClearOnShutdown.
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static StaticMutex gOwnerThreadMutex;
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static nsCOMPtr<nsISerialEventTarget> gOwnerThread
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MOZ_GUARDED_BY(gOwnerThreadMutex);
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};
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} // namespace mozilla::dom
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#endif // mozilla_dom_midirMIDIPlatformService_h
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