media/midi/midi_manager_alsa.h

   1 // Copyright 2014 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 MEDIA_MIDI_MIDI_MANAGER_ALSA_H_
   6 #define MEDIA_MIDI_MIDI_MANAGER_ALSA_H_
   7
   8 #include <poll.h>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/threading/thread.h"
  14 #include "media/midi/midi_manager.h"
  15
  16 namespace media {
  17
  18 class MidiManagerAlsa : public MidiManager {
  19  public:
  20   MidiManagerAlsa();
  21   virtual ~MidiManagerAlsa();
  22
  23   // MidiManager implementation.
  24   virtual void StartInitialization() OVERRIDE;
  25   virtual void DispatchSendMidiData(MidiManagerClient* client,
  26                                     uint32 port_index,
  27                                     const std::vector<uint8>& data,
  28                                     double timestamp) OVERRIDE;
  29
  30  private:
  31   void EventReset();
  32   void EventLoop();
  33
  34   class MidiDeviceInfo;
  35   std::vector<scoped_refptr<MidiDeviceInfo> > in_devices_;
  36   std::vector<scoped_refptr<MidiDeviceInfo> > out_devices_;
  37   base::Thread send_thread_;
  38   base::Thread event_thread_;
  39
  40   // Used for shutting down the |event_thread_| safely.
  41   int pipe_fd_[2];
  42   // Used for polling input MIDI ports and |pipe_fd_| in |event_thread_|.
  43   std::vector<struct pollfd> poll_fds_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(MidiManagerAlsa);
  46 };
  47
  48 }  // namespace media
  49
  50 #endif  // MEDIA_MIDI_MIDI_MANAGER_ALSA_H_