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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 WEBKIT_GLUE_MEDIA_WEB_DATA_SOURCE_H_
#define WEBKIT_GLUE_MEDIA_WEB_DATA_SOURCE_H_
#include "media/base/filters.h"
#include "media/base/pipeline_status.h"
namespace webkit_glue {
// An interface that allows WebMediaPlayerImpl::Proxy to communicate with the
// DataSource in the pipeline.
class WebDataSource : public media::DataSource {
public:
WebDataSource();
virtual ~WebDataSource();
// Initialize this object using |url|. This object calls |callback| when
// initialization has completed.
virtual void Initialize(const std::string& url,
media::PipelineStatusCallback* callback) = 0;
// Called to cancel initialization. The callback passed in Initialize() will
// be destroyed and will not be called after this method returns. Once this
// method returns, the object will be in an uninitialized state and
// Initialize() cannot be called again. The caller is expected to release
// its handle to this object and never call it again.
virtual void CancelInitialize() = 0;
// Returns true if the media resource has a single origin, false otherwise.
//
// Method called on the render thread.
virtual bool HasSingleOrigin() = 0;
// This method is used to unblock any read calls that would cause the
// media pipeline to stall.
//
// Method called on the render thread.
virtual void Abort() = 0;
private:
DISALLOW_COPY_AND_ASSIGN(WebDataSource);
};
// Temporary hack to allow WebMediaPlayerImpl::Proxy::AddDataSource() to
// be called when WebDataSource objects are created. This can be removed
// once WebMediaPlayerImpl::Proxy is fixed so it doesn't have to track
// WebDataSources. Proxy only has to track WebDataSources so it can call Abort()
// on them at shutdown. Once cancellation is added to DataSource and pause
// support in Demuxers cancel pending reads, Proxy shouldn't have to keep
// a WebDataSource list or call Abort().
typedef Callback1<WebDataSource*>::Type WebDataSourceBuildObserverHack;
} // namespace webkit_glue
#endif // WEBKIT_GLUE_MEDIA_WEB_DATA_SOURCE_H_
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