зеркало из https://github.com/mozilla/gecko-dev.git
66 строки
2.2 KiB
C++
66 строки
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MediaResourceCallback_h_
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#define MediaResourceCallback_h_
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#include "nsError.h"
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#include "nsISupportsImpl.h"
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#include "MediaResult.h"
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namespace mozilla {
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class AbstractThread;
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class MediaDecoderOwner;
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class MediaResource;
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/**
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* A callback used by MediaResource (sub-classes like FileMediaResource,
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* RtspMediaResource, and ChannelMediaResource) to notify various events.
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* Currently this is implemented by MediaDecoder only.
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*
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* Since this class has no pure virtual function, it is convenient to write
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* gtests for the readers without using a mock MediaResource when you don't
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* care about the events notified by the MediaResource.
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*/
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class MediaResourceCallback {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MediaResourceCallback);
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// Return an abstract thread on which to run main thread runnables.
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virtual AbstractThread* AbstractMainThread() const { return nullptr; }
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// Returns a weak reference to the media decoder owner.
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virtual MediaDecoderOwner* GetMediaOwner() const { return nullptr; }
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// Notify that a network error is encountered.
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virtual void NotifyNetworkError(const MediaResult& aError) {}
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// Notify that data arrives on the stream and is read into the cache.
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virtual void NotifyDataArrived() {}
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// Notify download is ended.
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// NOTE: this can be called with the media cache lock held, so don't
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// block or do anything which might try to acquire a lock!
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virtual void NotifyDataEnded(nsresult aStatus) {}
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// Notify that the principal of MediaResource has changed.
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virtual void NotifyPrincipalChanged() {}
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// Notify that the "cache suspended" status of MediaResource changes.
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virtual void NotifySuspendedStatusChanged(bool aSuspendedByCache) {}
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// Notify the number of bytes read from the resource.
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virtual void NotifyBytesConsumed(int64_t aBytes, int64_t aOffset) {}
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protected:
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virtual ~MediaResourceCallback() {}
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};
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} // namespace mozilla
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#endif //MediaResourceCallback_h_
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