dom/midi/midirMIDIPlatformService.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_midirMIDIPlatformService_h
   8 #define mozilla_dom_midirMIDIPlatformService_h
   9
  10 #include "mozilla/StaticMutex.h"
  11 #include "mozilla/dom/MIDIPlatformService.h"
  12 #include "mozilla/dom/MIDITypes.h"
  13 #include "mozilla/dom/midi/midir_impl_ffi_generated.h"
  14
  15 class nsIThread;
  16 struct MidirWrapper;
  17
  18 namespace mozilla::dom {
  19
  20 class MIDIPortInterface;
  21
  22 /**
  23  * Platform service implementation using the midir crate.
  24  */
  25 class midirMIDIPlatformService : public MIDIPlatformService {
  26  public:
  27   midirMIDIPlatformService();
  28   virtual void Init() override;
  29   virtual void Open(MIDIPortParent* aPort) override;
  30   virtual void Stop() override;
  31   virtual void ScheduleSend(const nsAString& aPort) override;
  32   virtual void ScheduleClose(MIDIPortParent* aPort) override;
  33
  34   void SendMessage(const nsAString& aPort, const MIDIMessage& aMessage);
  35
  36  private:
  37   virtual ~midirMIDIPlatformService();
  38
  39   static void AddPort(const nsString* aId, const nsString* aName, bool aInput);
  40   static void CheckAndReceive(const nsString* aId, const uint8_t* aData,
  41                               size_t aLength, const GeckoTimeStamp* aTimeStamp,
  42                               uint64_t aMicros);
  43
  44   // Wrapper around the midir Rust implementation.
  45   MidirWrapper* mImplementation;
  46
  47   // midir has its own internal threads and we can't execute jobs directly on
  48   // them, instead we forward them to the background thread the service was
  49   // created in.
  50   static StaticMutex gBackgroundThreadMutex;
  51   static nsCOMPtr<nsIThread> gBackgroundThread;
  52 };
  53
  54 }  // namespace mozilla::dom
  55
  56 #endif  // mozilla_dom_midirMIDIPlatformService_h