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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBMIDI_MIDI_DISPATCHER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBMIDI_MIDI_DISPATCHER_H_
#include "base/containers/span.h"
#include "base/memory/raw_ptr.h"
#include "media/midi/midi_service.mojom-blink.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_receiver.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class MIDIDispatcher : public GarbageCollected<MIDIDispatcher>,
public midi::mojom::blink::MidiSessionClient {
public:
class Client : public GarbageCollectedMixin {
public:
virtual void DidAddInputPort(const String& id,
const String& manufacturer,
const String& name,
const String& version,
midi::mojom::PortState) = 0;
virtual void DidAddOutputPort(const String& id,
const String& manufacturer,
const String& name,
const String& version,
midi::mojom::PortState) = 0;
virtual void DidSetInputPortState(unsigned port_index,
midi::mojom::PortState) = 0;
virtual void DidSetOutputPortState(unsigned port_index,
midi::mojom::PortState) = 0;
virtual void DidStartSession(midi::mojom::Result) = 0;
virtual void DidReceiveMIDIData(unsigned port_index,
base::span<const uint8_t> data,
base::TimeTicks time_stamp) = 0;
};
explicit MIDIDispatcher(ExecutionContext* execution_context);
~MIDIDispatcher() override;
void SetClient(Client* client) { client_ = client; }
void SendMIDIData(uint32_t port,
base::span<const uint8_t> data,
base::TimeTicks timestamp);
// midi::mojom::blink::MidiSessionClient implementation.
// All of the following methods are run on the main thread.
void AddInputPort(midi::mojom::blink::PortInfoPtr info) override;
void AddOutputPort(midi::mojom::blink::PortInfoPtr info) override;
void SetInputPortState(uint32_t port,
midi::mojom::blink::PortState state) override;
void SetOutputPortState(uint32_t port,
midi::mojom::blink::PortState state) override;
void SessionStarted(midi::mojom::blink::Result result) override;
void AcknowledgeSentData(uint32_t bytes) override;
void DataReceived(uint32_t port,
const Vector<uint8_t>& data,
base::TimeTicks timestamp) override;
void Trace(Visitor* visitor) const;
private:
Member<Client> client_;
bool initialized_ = false;
// Holds MidiPortInfoList for input ports and output ports.
Vector<midi::mojom::blink::PortInfo> inputs_;
Vector<midi::mojom::blink::PortInfo> outputs_;
// TODO(toyoshim): Consider to have a per-process limit.
size_t unacknowledged_bytes_sent_ = 0u;
HeapMojoRemote<midi::mojom::blink::MidiSession> midi_session_;
HeapMojoReceiver<midi::mojom::blink::MidiSessionClient, MIDIDispatcher>
receiver_;
HeapMojoRemote<midi::mojom::blink::MidiSessionProvider>
midi_session_provider_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBMIDI_MIDI_DISPATCHER_H_
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