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// Copyright (c) 2012 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_PUBLIC_BROWSER_MEDIA_OBSERVER_H_
#define CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_
#pragma once
#include "content/public/common/media_stream_request.h"
namespace media {
struct MediaLogEvent;
}
namespace content {
// An embedder may implement MediaObserver and return it from
// ContentBrowserClient to receive callbacks as media events occur.
class MediaObserver {
public:
// Called when an audio stream is deleted.
virtual void OnDeleteAudioStream(void* host, int stream_id) = 0;
// Called when an audio stream is set to playing or paused.
virtual void OnSetAudioStreamPlaying(void* host, int stream_id,
bool playing) = 0;
// Called when the status of an audio stream is set to "created", "flushed",
// "closed", or "error".
virtual void OnSetAudioStreamStatus(void* host, int stream_id,
const std::string& status) = 0;
// Called when the volume of an audio stream is set.
virtual void OnSetAudioStreamVolume(void* host, int stream_id,
double volume) = 0;
// Called when a MediaEvent occurs.
virtual void OnMediaEvent(int render_process_id,
const media::MediaLogEvent& event) = 0;
// Called when capture devices are opened.
virtual void OnCaptureDevicesOpened(
int render_process_id,
int render_view_id,
const content::MediaStreamDevices& devices) = 0;
// Called when the opened capture devices are closed.
virtual void OnCaptureDevicesClosed(
int render_process_id,
int render_view_id,
const content::MediaStreamDevices& devices) = 0;
protected:
virtual ~MediaObserver() {}
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_
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