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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 MEDIA_BASE_DEMUXER_H_
#define MEDIA_BASE_DEMUXER_H_
#include <vector>
#include "base/time/time.h"
#include "media/base/data_source.h"
#include "media/base/demuxer_stream.h"
#include "media/base/media_export.h"
#include "media/base/pipeline_status.h"
namespace media {
class MEDIA_EXPORT DemuxerHost : public DataSourceHost {
public:
// Sets the duration of the media in microseconds.
// Duration may be kInfiniteDuration() if the duration is not known.
virtual void SetDuration(base::TimeDelta duration) = 0;
// Stops execution of the pipeline due to a fatal error. Do not call this
// method with PIPELINE_OK.
virtual void OnDemuxerError(PipelineStatus error) = 0;
protected:
virtual ~DemuxerHost();
};
class MEDIA_EXPORT Demuxer {
public:
// A new potentially encrypted stream has been parsed.
// First parameter - The type of initialization data.
// Second parameter - The initialization data associated with the stream.
typedef base::Callback<void(const std::string& type,
const std::vector<uint8>& init_data)> NeedKeyCB;
Demuxer();
virtual ~Demuxer();
// Completes initialization of the demuxer.
//
// The demuxer does not own |host| as it is guaranteed to outlive the
// lifetime of the demuxer. Don't delete it!
virtual void Initialize(DemuxerHost* host,
const PipelineStatusCB& status_cb) = 0;
// 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& status_cb);
// Starts stopping this demuxer, executing the callback upon completion.
//
// After the callback completes the demuxer may be destroyed. It is illegal to
// call any method (including Stop()) after a demuxer has stopped.
virtual void Stop(const base::Closure& 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).
// TODO(scherkus): this might not be needed http://crbug.com/234708
virtual void OnAudioRendererDisabled();
// Returns the given stream type, or NULL if that type is not present.
virtual DemuxerStream* GetStream(DemuxerStream::Type type) = 0;
// Returns the starting time for the media file.
virtual base::TimeDelta GetStartTime() const = 0;
private:
DISALLOW_COPY_AND_ASSIGN(Demuxer);
};
} // namespace media
#endif // MEDIA_BASE_DEMUXER_H_
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