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 <alsa/asoundlib.h> 9 #include <map> 10 #include <vector> 11 12 #include "base/basictypes.h" 13 #include "base/memory/scoped_ptr.h" 14 #include "base/synchronization/lock.h" 15 #include "base/threading/thread.h" 16 #include "media/midi/midi_manager.h" 17 18 namespace media { 19 20 class MidiManagerAlsa : public MidiManager { 21 public: 22 MidiManagerAlsa(); 23 virtual ~MidiManagerAlsa(); 24 25 // MidiManager implementation. 26 virtual void StartInitialization() OVERRIDE; 27 virtual void DispatchSendMidiData(MidiManagerClient* client, 28 uint32 port_index, 29 const std::vector<uint8>& data, 30 double timestamp) OVERRIDE; 31 32 private: 33 // An internal callback that runs on MidiSendThread. 34 void SendMidiData(uint32 port_index, 35 const std::vector<uint8>& data); 36 37 void EventReset(); 38 void EventLoop(); 39 40 // Alsa seq handles. 41 snd_seq_t* in_client_; 42 snd_seq_t* out_client_; 43 int out_client_id_; 44 45 // One input port, many output ports. 46 int in_port_; 47 std::vector<int> out_ports_; 48 49 // Mapping from Alsa client:port to our index. 50 typedef std::map<int, uint32> SourceMap; 51 SourceMap source_map_; 52 53 // Alsa event <-> MIDI coders. 54 snd_midi_event_t* decoder_; 55 typedef std::vector<snd_midi_event_t*> EncoderList; 56 EncoderList encoders_; 57 58 base::Thread send_thread_; 59 base::Thread event_thread_; 60 61 bool event_thread_shutdown_; // guarded by shutdown_lock_ 62 base::Lock shutdown_lock_; // guards event_thread_shutdown_ 63 64 DISALLOW_COPY_AND_ASSIGN(MidiManagerAlsa); 65 }; 66 67 } // namespace media 68 69 #endif // MEDIA_MIDI_MIDI_MANAGER_ALSA_H_ 70
