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// Copyright 2017 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 CONTENT_RENDERER_MEDIA_AUDIO_AUDIO_OUTPUT_IPC_FACTORY_H_
#define CONTENT_RENDERER_MEDIA_AUDIO_AUDIO_OUTPUT_IPC_FACTORY_H_
#include <memory>
#include "base/containers/flat_map.h"
#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
#include "content/common/media/renderer_audio_output_stream_factory.mojom.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace media {
class AudioOutputIPC;
}
namespace service_manager {
class InterfaceProvider;
}
namespace content {
// This is a factory for AudioOutputIPC objects. It is threadsafe. This class
// is designed to be leaked at shutdown, as it posts tasks to itself using
// base::Unretained and also hands out references to itself in the
// AudioOutputIPCs it creates, but in the case where the owner is sure that
// there are no outstanding references (such as in a unit test), the class can
// be destructed.
// TODO(maxmorin): Registering the factories for each frame will become
// unnecessary when https://crbug.com/668275 is fixed. When that is done, this
// class can be greatly simplified.
class CONTENT_EXPORT AudioOutputIPCFactory {
public:
AudioOutputIPCFactory(
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
~AudioOutputIPCFactory();
static AudioOutputIPCFactory* get() { return instance_; }
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner() const {
return io_task_runner_;
}
// Enables |this| to create MojoAudioOutputIPCs for the specified frame.
// Does nothing if not using mojo factories.
void RegisterRemoteFactory(
int frame_id,
service_manager::InterfaceProvider* interface_provider);
// Every call to the above method must be matched by a call to this one when
// the frame is destroyed. Does nothing if not using mojo factories.
void MaybeDeregisterRemoteFactory(int frame_id);
// The returned object may only be used on |io_task_runner()|.
std::unique_ptr<media::AudioOutputIPC> CreateAudioOutputIPC(
int frame_id) const;
private:
using StreamFactoryMap =
base::flat_map<int, mojom::RendererAudioOutputStreamFactoryPtr>;
mojom::RendererAudioOutputStreamFactory* GetRemoteFactory(int frame_id) const;
void RegisterRemoteFactoryOnIOThread(
int frame_id,
mojom::RendererAudioOutputStreamFactoryPtrInfo factory_ptr_info);
void MaybeDeregisterRemoteFactoryOnIOThread(int frame_id);
// Indicates whether mojo factories are used.
bool UsingMojoFactories() const;
// Maps frame id to the corresponding factory.
StreamFactoryMap factory_ptrs_;
const scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
// Global instance, set in constructor and unset in destructor.
static AudioOutputIPCFactory* instance_;
DISALLOW_COPY_AND_ASSIGN(AudioOutputIPCFactory);
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_AUDIO_AUDIO_OUTPUT_IPC_FACTORY_H_
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