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// Copyright 2014 The Chromium Authors. All rights reserved.
// 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_USB_H_
#define MEDIA_MIDI_MIDI_MANAGER_USB_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/containers/hash_tables.h"
#include "base/macros.h"
#include "base/synchronization/lock.h"
#include "base/time/time.h"
#include "media/midi/midi_manager.h"
#include "media/midi/usb_midi_device.h"
#include "media/midi/usb_midi_export.h"
#include "media/midi/usb_midi_input_stream.h"
#include "media/midi/usb_midi_jack.h"
#include "media/midi/usb_midi_output_stream.h"
namespace midi {
class MidiScheduler;
// MidiManager for USB-MIDI.
class USB_MIDI_EXPORT MidiManagerUsb
: public MidiManager,
public UsbMidiDeviceDelegate,
NON_EXPORTED_BASE(public UsbMidiInputStream::Delegate) {
public:
explicit MidiManagerUsb(
std::unique_ptr<UsbMidiDevice::Factory> device_factory);
~MidiManagerUsb() override;
// MidiManager implementation.
void StartInitialization() override;
void Finalize() override;
void DispatchSendMidiData(MidiManagerClient* client,
uint32_t port_index,
const std::vector<uint8_t>& data,
double timestamp) override;
// UsbMidiDeviceDelegate implementation.
void ReceiveUsbMidiData(UsbMidiDevice* device,
int endpoint_number,
const uint8_t* data,
size_t size,
base::TimeTicks time) override;
void OnDeviceAttached(std::unique_ptr<UsbMidiDevice> device) override;
void OnDeviceDetached(size_t index) override;
// UsbMidiInputStream::Delegate implementation.
void OnReceivedData(size_t jack_index,
const uint8_t* data,
size_t size,
base::TimeTicks time) override;
const ScopedVector<UsbMidiOutputStream>& output_streams() const {
return output_streams_;
}
const UsbMidiInputStream* input_stream() const { return input_stream_.get(); }
// Initializes this object.
// When the initialization finishes, |callback| will be called with the
// result.
// When this factory is destroyed during the operation, the operation
// will be canceled silently (i.e. |callback| will not be called).
// The function is public just for unit tests. Do not call this function
// outside code for testing.
void Initialize(base::Callback<void(mojom::Result result)> callback);
private:
void OnEnumerateDevicesDone(bool result, UsbMidiDevice::Devices* devices);
bool AddPorts(UsbMidiDevice* device, int device_id);
std::unique_ptr<UsbMidiDevice::Factory> device_factory_;
ScopedVector<UsbMidiDevice> devices_;
ScopedVector<UsbMidiOutputStream> output_streams_;
std::unique_ptr<UsbMidiInputStream> input_stream_;
base::Callback<void(mojom::Result result)> initialize_callback_;
// A map from <endpoint_number, cable_number> to the index of input jacks.
base::hash_map<std::pair<int, int>, size_t> input_jack_dictionary_;
// Lock to ensure the MidiScheduler is being destructed only once in
// Finalize() on Chrome_IOThread.
base::Lock scheduler_lock_;
std::unique_ptr<MidiScheduler> scheduler_;
DISALLOW_COPY_AND_ASSIGN(MidiManagerUsb);
};
} // namespace midi
#endif // MEDIA_MIDI_MIDI_MANAGER_USB_H_