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// Copyright (c) 2011 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_DEMUXER_H_
#define MEDIA_BASE_DEMUXER_H_
#include "base/memory/ref_counted.h"
#include "media/base/demuxer_stream.h"
#include "media/base/media_export.h"
// TODO(acolwell): Remove include once DataSource & Preload are moved
// out of "media/base/filters.h" and Stop() is converted to use new callbacks.
#include "media/base/filters.h"
#include "media/base/pipeline_status.h"
namespace media {
class FilterHost;
class MEDIA_EXPORT Demuxer
: public base::RefCountedThreadSafe<Demuxer> {
public:
// Sets the private member |host_|. This is the first method called by
// the FilterHost after a demuxer is created. The host holds a strong
// reference to the demuxer. The reference held by the host is guaranteed
// to be released before the host object is destroyed by the pipeline.
//
// TODO(acolwell): Change this to a narrow DemuxerHost interface.
virtual void set_host(FilterHost* host);
// The pipeline playback rate has been changed. Demuxers may implement this
// method if they need to respond to this call.
virtual void SetPlaybackRate(float playback_rate);
// Carry out any actions required to seek to the given time, executing the
// callback upon completion.
virtual void Seek(base::TimeDelta time, const PipelineStatusCB& callback);
// The pipeline is being stopped either as a result of an error or because
// the client called Stop().
//
// TODO(acolwell): Convert to base::Closure.
virtual void Stop(FilterCallback* callback);
// This method is called from the pipeline when the audio renderer
// is disabled. Demuxers can ignore the notification if they do not
// need to react to this event.
//
// TODO(acolwell): Change to generic DisableStream(DemuxerStream::Type).
virtual void OnAudioRendererDisabled();
// Returns the given stream type, or NULL if that type is not present.
virtual scoped_refptr<DemuxerStream> GetStream(DemuxerStream::Type type) = 0;
// Alert the Demuxer that the video preload value has been changed.
virtual void SetPreload(Preload preload) = 0;
// Returns the starting time for the media file.
virtual base::TimeDelta GetStartTime() const = 0;
protected:
Demuxer();
FilterHost* host() { return host_; }
friend class base::RefCountedThreadSafe<Demuxer>;
virtual ~Demuxer();
private:
FilterHost* host_;
DISALLOW_COPY_AND_ASSIGN(Demuxer);
};
} // namespace media
#endif // MEDIA_BASE_DEMUXER_H_
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