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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MediaResourceCallback_h_
#define MediaResourceCallback_h_
#include "nsError.h"
#include "nsISupportsImpl.h"
namespace mozilla {
class MediaDecoderOwner;
class MediaResource;
/**
* A callback used by MediaResource (sub-classes like FileMediaResource,
* RtspMediaResource, and ChannelMediaResource) to notify various events.
* Currently this is implemented by MediaDecoder only.
*
* Since this class has no pure virtual function, it is convenient to write
* gtests for the readers without using a mock MediaResource when you don't
* care about the events notified by the MediaResource.
*/
class MediaResourceCallback {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MediaResourceCallback);
// Returns a weak reference to the media decoder owner.
virtual MediaDecoderOwner* GetMediaOwner() const { return nullptr; }
// Notify is duration is known to this MediaResource.
virtual void SetInfinite(bool aInfinite) {}
// Notify that a network error is encountered.
virtual void NotifyNetworkError() {}
// Notify that decoding has failed.
virtual void NotifyDecodeError() {}
// Notify that data arrives on the stream and is read into the cache.
virtual void NotifyDataArrived() {}
// Notify that MediaResource has received some data.
virtual void NotifyBytesDownloaded() {}
// Notify download is ended.
// NOTE: this can be called with the media cache lock held, so don't
// block or do anything which might try to acquire a lock!
virtual void NotifyDataEnded(nsresult aStatus) {}
// Notify that the principal of MediaResource has changed.
virtual void NotifyPrincipalChanged() {}
// Notify that the "cache suspended" status of MediaResource changes.
virtual void NotifySuspendedStatusChanged() {}
// Notify the number of bytes read from the resource.
virtual void NotifyBytesConsumed(int64_t aBytes, int64_t aOffset) {}
protected:
virtual ~MediaResourceCallback() {}
};
} // namespace mozilla
#endif //MediaResourceCallback_h_
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