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// Copyright 2016 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_BASE_RENDERER_CLIENT_H_
#define MEDIA_BASE_RENDERER_CLIENT_H_
#include "base/time/time.h"
#include "media/base/pipeline_status.h"
#include "ui/gfx/geometry/size.h"
namespace media {
// Interface used by Renderer, AudioRenderer, VideoRenderer and
// MediaPlayerRenderer implementations to notify their clients.
class RendererClient {
public:
// Executed if any error was encountered after Renderer initialization.
virtual void OnError(PipelineStatus status) = 0;
// Executed when rendering has reached the end of stream.
virtual void OnEnded() = 0;
// Executed periodically with rendering statistics.
virtual void OnStatisticsUpdate(const PipelineStatistics& stats) = 0;
// Executed when buffering state is changed.
virtual void OnBufferingStateChange(BufferingState state) = 0;
// Executed whenever the key needed to decrypt the stream is not available.
virtual void OnWaitingForDecryptionKey() = 0;
// Executed for the first video frame and whenever natural size changes.
// Only used if media stream contains video track.
virtual void OnVideoNaturalSizeChange(const gfx::Size& size) = 0;
// Executed for the first video frame and whenever opacity changes.
// Only used if media stream contains video track.
virtual void OnVideoOpacityChange(bool opaque) = 0;
// Executed when video metadata is first read, and whenever it changes.
// Only used when we are using a URL demuxer (e.g. for MediaPlayerRenderer).
virtual void OnDurationChange(base::TimeDelta duration) = 0;
};
} // namespace media
#endif // MEDIA_BASE_RENDERER_CLIENT_H_
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