content/browser/renderer_host/media/midi_host.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_HOST_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_HOST_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "content/common/content_export.h"
  11 #include "content/public/browser/browser_message_filter.h"
  12 #include "content/public/browser/browser_thread.h"
  13 #include "media/midi/midi_manager.h"
  14
  15 namespace media {
  16 class MIDIManager;
  17 }
  18
  19 namespace content {
  20
  21 class CONTENT_EXPORT MIDIHost
  22     : public BrowserMessageFilter,
  23       public media::MIDIManagerClient {
  24  public:
  25   // Called from UI thread from the owner of this object.
  26   MIDIHost(media::MIDIManager* midi_manager);
  27
  28   // BrowserMessageFilter implementation.
  29   virtual void OnChannelClosing() OVERRIDE;
  30   virtual void OnDestruct() const OVERRIDE;
  31   virtual bool OnMessageReceived(const IPC::Message& message,
  32                                  bool* message_was_ok) OVERRIDE;
  33
  34   // MIDIManagerClient implementation.
  35   virtual void ReceiveMIDIData(
  36       int port_index,
  37       const uint8* data,
  38       size_t length,
  39       double timestamp) OVERRIDE;
  40
  41   // Request access to MIDI hardware.
  42   void OnRequestAccess(int client_id, int access);
  43
  44   // Data to be sent to a MIDI output port.
  45   void OnSendData(int port,
  46                   const std::vector<uint8>& data,
  47                   double timestamp);
  48
  49  private:
  50   friend class base::DeleteHelper<MIDIHost>;
  51   friend class BrowserThread;
  52
  53   virtual ~MIDIHost();
  54
  55   media::MIDIManager* const midi_manager_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(MIDIHost);
  58 };
  59
  60 }  // namespace content
  61
  62 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MIDI_HOST_H_