| // Copyright 2017 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MEDIA_MIDI_MIDI_MANAGER_WIN_H_ |
| #define MEDIA_MIDI_MIDI_MANAGER_WIN_H_ |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "base/functional/callback_forward.h" |
| #include "base/memory/scoped_refptr.h" |
| #include "base/system/system_monitor.h" |
| #include "media/midi/midi_export.h" |
| #include "media/midi/midi_manager.h" |
| |
| namespace base { |
| class SingleThreadTaskRunner; |
| class TimeDelta; |
| } // namespace base |
| |
| namespace midi { |
| |
| // New backend for legacy Windows that support dynamic instantiation. |
| class MidiManagerWin final |
| : public MidiManager, |
| public base::SystemMonitor::DevicesChangedObserver { |
| public: |
| class PortManager; |
| |
| MIDI_EXPORT static void OverflowInstanceIdForTesting(); |
| |
| explicit MidiManagerWin(MidiService* service); |
| |
| MidiManagerWin(const MidiManagerWin&) = delete; |
| MidiManagerWin& operator=(const MidiManagerWin&) = delete; |
| |
| ~MidiManagerWin() override; |
| |
| // Returns PortManager that implements interfaces to help implementation. |
| // This hides Windows specific structures, i.e. HMIDIIN in the header. |
| PortManager* port_manager() { return port_manager_.get(); } |
| |
| // MidiManager overrides: |
| void StartInitialization() override; |
| void DispatchSendMidiData(MidiManagerClient* client, |
| uint32_t port_index, |
| const std::vector<uint8_t>& data, |
| base::TimeTicks timestamp) override; |
| |
| // base::SystemMonitor::DevicesChangedObserver overrides: |
| void OnDevicesChanged(base::SystemMonitor::DeviceType device_type) override; |
| |
| private: |
| class InPort; |
| class OutPort; |
| |
| // Handles MIDI inport event posted from a thread system provides. |
| void ReceiveMidiData(uint32_t index, |
| const std::vector<uint8_t>& data, |
| base::TimeTicks time); |
| |
| // Posts a task to TaskRunner, and ensures that the instance keeps alive while |
| // the task is running. |
| void PostTask(base::OnceClosure); |
| void PostDelayedTask(base::OnceClosure, base::TimeDelta delay); |
| |
| // Posts a reply task to the I/O thread that hosts MidiManager instance, runs |
| // it safely, and ensures that the instance keeps alive while the task is |
| // running. |
| void PostReplyTask(base::OnceClosure); |
| |
| // Initializes instance asynchronously on TaskRunner. |
| void InitializeOnTaskRunner(); |
| |
| // Updates device lists on TaskRunner. |
| // Returns true if device lists were changed. |
| void UpdateDeviceListOnTaskRunner(); |
| |
| // Reflect active port list to a device list. |
| template <typename T> |
| void ReflectActiveDeviceList(MidiManagerWin* manager, |
| std::vector<std::unique_ptr<T>>* known_ports, |
| std::vector<std::unique_ptr<T>>* active_ports); |
| |
| // Sends MIDI data on TaskRunner. |
| void SendOnTaskRunner(MidiManagerClient* client, |
| uint32_t port_index, |
| const std::vector<uint8_t>& data); |
| |
| // Holds an unique instance ID. |
| const int64_t instance_id_; |
| |
| // Keeps a TaskRunner for the I/O thread. |
| scoped_refptr<base::SingleThreadTaskRunner> thread_runner_; |
| |
| // Manages platform dependent implementation for port managegent. Should be |
| // accessed with the task lock. |
| std::unique_ptr<PortManager> port_manager_; |
| }; |
| |
| } // namespace midi |
| |
| #endif // MEDIA_MIDI_MIDI_MANAGER_WIN_H_ |