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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef MEDIA_MIDI_MIDI_MANAGER_H_ | 5 #ifndef MEDIA_MIDI_MIDI_MANAGER_H_ |
| 6 #define MEDIA_MIDI_MIDI_MANAGER_H_ | 6 #define MEDIA_MIDI_MIDI_MANAGER_H_ |
| 7 | 7 |
| 8 #include <set> | 8 #include <set> |
| 9 #include <vector> | 9 #include <vector> |
| 10 | 10 |
| 11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
| 12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
| 13 #include "base/synchronization/lock.h" | 13 #include "base/synchronization/lock.h" |
| 14 #include "base/time/time.h" | 14 #include "base/time/time.h" |
| 15 #include "media/base/media_export.h" | 15 #include "media/midi/midi_export.h" |
| 16 #include "media/midi/midi_port_info.h" | 16 #include "media/midi/midi_port_info.h" |
| 17 #include "media/midi/midi_result.h" | 17 #include "media/midi/midi_result.h" |
| 18 | 18 |
| 19 namespace base { | 19 namespace base { |
| 20 class SingleThreadTaskRunner; | 20 class SingleThreadTaskRunner; |
| 21 } // namespace base | 21 } // namespace base |
| 22 | 22 |
| 23 namespace media { | 23 namespace media { |
| 24 | 24 |
| 25 // A MidiManagerClient registers with the MidiManager to receive MIDI data. | 25 // A MidiManagerClient registers with the MidiManager to receive MIDI data. |
| 26 // See MidiManager::RequestAccess() and MidiManager::ReleaseAccess() | 26 // See MidiManager::RequestAccess() and MidiManager::ReleaseAccess() |
| 27 // for details. | 27 // for details. |
| 28 class MEDIA_EXPORT MidiManagerClient { | 28 class MIDI_EXPORT MidiManagerClient { |
| 29 public: | 29 public: |
| 30 virtual ~MidiManagerClient() {} | 30 virtual ~MidiManagerClient() {} |
| 31 | 31 |
| 32 // AddInputPort() and AddOutputPort() are called before CompleteStartSession() | 32 // AddInputPort() and AddOutputPort() are called before CompleteStartSession() |
| 33 // is called to notify existing MIDI ports, and also called after that to | 33 // is called to notify existing MIDI ports, and also called after that to |
| 34 // notify new MIDI ports are added. | 34 // notify new MIDI ports are added. |
| 35 virtual void AddInputPort(const MidiPortInfo& info) = 0; | 35 virtual void AddInputPort(const MidiPortInfo& info) = 0; |
| 36 virtual void AddOutputPort(const MidiPortInfo& info) = 0; | 36 virtual void AddOutputPort(const MidiPortInfo& info) = 0; |
| 37 | 37 |
| 38 // SetInputPortState() and SetOutputPortState() are called to notify a known | 38 // SetInputPortState() and SetOutputPortState() are called to notify a known |
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| 56 double timestamp) = 0; | 56 double timestamp) = 0; |
| 57 | 57 |
| 58 // AccumulateMidiBytesSent() is called to acknowledge when bytes have | 58 // AccumulateMidiBytesSent() is called to acknowledge when bytes have |
| 59 // successfully been sent to the hardware. | 59 // successfully been sent to the hardware. |
| 60 // This happens as a result of the client having previously called | 60 // This happens as a result of the client having previously called |
| 61 // MidiManager::DispatchSendMidiData(). | 61 // MidiManager::DispatchSendMidiData(). |
| 62 virtual void AccumulateMidiBytesSent(size_t n) = 0; | 62 virtual void AccumulateMidiBytesSent(size_t n) = 0; |
| 63 }; | 63 }; |
| 64 | 64 |
| 65 // Manages access to all MIDI hardware. | 65 // Manages access to all MIDI hardware. |
| 66 class MEDIA_EXPORT MidiManager { | 66 class MIDI_EXPORT MidiManager { |
| 67 public: | 67 public: |
| 68 static const size_t kMaxPendingClientCount = 128; | 68 static const size_t kMaxPendingClientCount = 128; |
| 69 | 69 |
| 70 MidiManager(); | 70 MidiManager(); |
| 71 virtual ~MidiManager(); | 71 virtual ~MidiManager(); |
| 72 | 72 |
| 73 // The constructor and the destructor will be called on the CrBrowserMain | 73 // The constructor and the destructor will be called on the CrBrowserMain |
| 74 // thread. | 74 // thread. |
| 75 static MidiManager* Create(); | 75 static MidiManager* Create(); |
| 76 | 76 |
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| 179 // Protects access to |clients_|, |pending_clients_|, |initialized_|, | 179 // Protects access to |clients_|, |pending_clients_|, |initialized_|, |
| 180 // |result_|, |input_ports_| and |output_ports_|. | 180 // |result_|, |input_ports_| and |output_ports_|. |
| 181 base::Lock lock_; | 181 base::Lock lock_; |
| 182 | 182 |
| 183 DISALLOW_COPY_AND_ASSIGN(MidiManager); | 183 DISALLOW_COPY_AND_ASSIGN(MidiManager); |
| 184 }; | 184 }; |
| 185 | 185 |
| 186 } // namespace media | 186 } // namespace media |
| 187 | 187 |
| 188 #endif // MEDIA_MIDI_MIDI_MANAGER_H_ | 188 #endif // MEDIA_MIDI_MIDI_MANAGER_H_ |
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