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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef ChannelMediaDecoder_h_
       8             : #define ChannelMediaDecoder_h_
       9             : 
      10             : #include "MediaDecoder.h"
      11             : #include "MediaResourceCallback.h"
      12             : 
      13             : class nsIChannel;
      14             : class nsIStreamListener;
      15             : 
      16             : namespace mozilla {
      17             : 
      18           0 : class ChannelMediaDecoder : public MediaDecoder
      19             : {
      20             :   // Used to register with MediaResource to receive notifications which will
      21             :   // be forwarded to MediaDecoder.
      22           0 :   class ResourceCallback : public MediaResourceCallback
      23             :   {
      24             :     // Throttle calls to MediaDecoder::NotifyDataArrived()
      25             :     // to be at most once per 500ms.
      26             :     static const uint32_t sDelay = 500;
      27             : 
      28             :   public:
      29             :     explicit ResourceCallback(AbstractThread* aMainThread);
      30             :     // Start to receive notifications from ResourceCallback.
      31             :     void Connect(ChannelMediaDecoder* aDecoder);
      32             :     // Called upon shutdown to stop receiving notifications.
      33             :     void Disconnect();
      34             : 
      35             :   private:
      36             :     /* MediaResourceCallback functions */
      37             :     MediaDecoderOwner* GetMediaOwner() const override;
      38             :     void SetInfinite(bool aInfinite) override;
      39             :     void NotifyNetworkError() override;
      40             :     void NotifyDataArrived() override;
      41             :     void NotifyDataEnded(nsresult aStatus) override;
      42             :     void NotifyPrincipalChanged() override;
      43             :     void NotifySuspendedStatusChanged() override;
      44             :     void NotifyBytesConsumed(int64_t aBytes, int64_t aOffset) override;
      45             : 
      46             :     static void TimerCallback(nsITimer* aTimer, void* aClosure);
      47             : 
      48             :     // The decoder to send notifications. Main-thread only.
      49             :     ChannelMediaDecoder* mDecoder = nullptr;
      50             :     nsCOMPtr<nsITimer> mTimer;
      51             :     bool mTimerArmed = false;
      52             :     const RefPtr<AbstractThread> mAbstractMainThread;
      53             :   };
      54             : 
      55             : protected:
      56             :   RefPtr<ResourceCallback> mResourceCallback;
      57             : 
      58             : public:
      59             :   explicit ChannelMediaDecoder(MediaDecoderInit& aInit);
      60             : 
      61             :   void Shutdown() override;
      62             : 
      63             :   // Create a new decoder of the same type as this one.
      64             :   // Subclasses must implement this.
      65             :   virtual ChannelMediaDecoder* Clone(MediaDecoderInit& aInit) = 0;
      66             : 
      67             :   virtual nsresult Load(nsIChannel* aChannel,
      68             :                         bool aIsPrivateBrowsing,
      69             :                         nsIStreamListener** aStreamListener);
      70             :   virtual nsresult Load(MediaResource* aOriginal);
      71             : 
      72             : private:
      73             :   nsresult OpenResource(nsIStreamListener** aStreamListener);
      74             : };
      75             : 
      76             : } // namespace mozilla
      77             : 
      78             : #endif // ChannelMediaDecoder_h_