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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 MEDIA_AUDIO_AUDIO_THREAD_H_
#define MEDIA_AUDIO_AUDIO_THREAD_H_
#include "media/base/media_export.h"
namespace base {
class SingleThreadTaskRunner;
} // namespace base
namespace media {
// This class encapulates the logic for the thread and task runners that the
// AudioManager and related classes run on.
class MEDIA_EXPORT AudioThread {
public:
virtual ~AudioThread() {}
// Synchronously stops all underlying threads.
virtual void Stop() = 0;
// Indicates whether the audio thread is responsive. If false, calling Stop()
// will likely block forever.
virtual bool IsHung() const = 0;
// Returns the task runner used for audio IO.
// It always returns a non-null task runner (even after Stop has been called).
virtual base::SingleThreadTaskRunner* GetTaskRunner() = 0;
// Heavyweight tasks should use GetWorkerTaskRunner() instead of
// GetTaskRunner(). On most platforms they are the same, but some share the
// UI loop with the audio IO loop.
// It always returns a non-null task runner (even after Stop has been called).
virtual base::SingleThreadTaskRunner* GetWorkerTaskRunner() = 0;
};
} // namespace media
#endif // MEDIA_AUDIO_AUDIO_THREAD_H_
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