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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/audio_decoder_config.h"
#include "media/base/buffering_state.h"
#include "media/base/media_status.h"
#include "media/base/pipeline_status.h"
#include "media/base/video_decoder_config.h"
#include "media/base/waiting.h"
#include "ui/gfx/geometry/size.h"
namespace media {
// Interface used by Renderer, AudioRenderer, VideoRenderer and
// MediaPlayerRenderer implementations to notify their clients.
class MEDIA_EXPORT 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. |reason| indicates the cause of
// the state change, when known.
virtual void OnBufferingStateChange(BufferingState state,
BufferingStateChangeReason reason) = 0;
// Executed whenever the Renderer is waiting because of |reason|.
virtual void OnWaiting(WaitingReason reason) = 0;
// Executed whenever DemuxerStream status returns kConfigChange. Initial
// configs provided by OnMetadata.
virtual void OnAudioConfigChange(const AudioDecoderConfig& config) = 0;
virtual void OnVideoConfigChange(const VideoDecoderConfig& config) = 0;
// Executed for the first video frame and whenever natural size changes.
// Only used if media stream contains a 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 a video track.
virtual void OnVideoOpacityChange(bool opaque) = 0;
// Returns true if video stream is available in the media resource.
// TODO(crbug.com/988535): Used by AudioRendererImpl. This can be removed
// when the bug is resolved.
virtual bool IsVideoStreamAvailable();
// Called when the bucketed frames per second has changed. |fps| will be
// unset if the frame rate is unstable. The duration used for the frame rate
// is based on the wall clock time, not the media time.
virtual void OnVideoFrameRateChange(base::Optional<int> fps) = 0;
};
} // namespace media
#endif // MEDIA_BASE_RENDERER_CLIENT_H_
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