blob: 5a5d68d3d6234171c33df2e2462e8d430e9c0402 [file] [log] [blame]
// Copyright 2013 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.
#include <string>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "media/base/output_device.h"
#include "url/gurl.h"
namespace content {
class MediaStreamAudioRenderer
: public base::RefCountedThreadSafe<MediaStreamAudioRenderer> {
// Starts rendering audio.
virtual void Start() = 0;
// Stops rendering audio.
virtual void Stop() = 0;
// Resumes rendering audio after being paused.
virtual void Play() = 0;
// Temporarily suspends rendering audio. The audio stream might still be
// active but new audio data is not provided to the consumer.
virtual void Pause() = 0;
// Sets the output volume.
virtual void SetVolume(float volume) = 0;
// Returns a pointer to the internal output device.
// The pointer is not to be owned by the caller and is valid only during
// the lifetime of the MediaStreamAudioRenderer.
// It can be null, which means that access to the output device is not
// supported.
virtual media::OutputDevice* GetOutputDevice() = 0;
// Time stamp that reflects the current render time. Should not be updated
// when paused.
virtual base::TimeDelta GetCurrentRenderTime() const = 0;
// Returns true if the implementation is a local renderer and false
// otherwise.
virtual bool IsLocalRenderer() const = 0;
friend class base::RefCountedThreadSafe<MediaStreamAudioRenderer>;
virtual ~MediaStreamAudioRenderer() {}
} // namespace content