The Tor Browser: content/media/mediasource/MediaSourceResource.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     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/. */

     7 #ifndef MOZILLA_MEDIASOURCERESOURCE_H_

     8 #define MOZILLA_MEDIASOURCERESOURCE_H_

    10 #include "MediaResource.h"

    12 namespace mozilla {

    14 class MediaSourceResource MOZ_FINAL : public MediaResource

    15 {

    16 public:

    17   MediaSourceResource() {}

    19   virtual nsresult Close() MOZ_OVERRIDE { return NS_OK; }

    20   virtual void Suspend(bool aCloseImmediately) MOZ_OVERRIDE {}

    21   virtual void Resume() MOZ_OVERRIDE {}

    22   virtual already_AddRefed<nsIPrincipal> GetCurrentPrincipal() MOZ_OVERRIDE { return nullptr; }

    23   virtual bool CanClone() MOZ_OVERRIDE { return false; }

    24   virtual already_AddRefed<MediaResource> CloneData(MediaDecoder* aDecoder) MOZ_OVERRIDE { return nullptr; }

    25   virtual void SetReadMode(MediaCacheStream::ReadMode aMode) MOZ_OVERRIDE {}

    26   virtual void SetPlaybackRate(uint32_t aBytesPerSecond) MOZ_OVERRIDE  {}

    27   virtual nsresult Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes) MOZ_OVERRIDE { return NS_ERROR_FAILURE; }

    28   virtual nsresult ReadAt(int64_t aOffset, char* aBuffer, uint32_t aCount, uint32_t* aBytes) MOZ_OVERRIDE { return NS_ERROR_FAILURE; }

    29   virtual nsresult Seek(int32_t aWhence, int64_t aOffset) MOZ_OVERRIDE { return NS_ERROR_FAILURE; }

    30   virtual void StartSeekingForMetadata() MOZ_OVERRIDE {}

    31   virtual void EndSeekingForMetadata() MOZ_OVERRIDE {}

    32   virtual int64_t Tell() MOZ_OVERRIDE { return -1; }

    33   virtual void Pin() MOZ_OVERRIDE {}

    34   virtual void Unpin() MOZ_OVERRIDE {}

    35   virtual double GetDownloadRate(bool* aIsReliable) MOZ_OVERRIDE { return 0; }

    36   virtual int64_t GetLength() MOZ_OVERRIDE { return -1; }

    37   virtual int64_t GetNextCachedData(int64_t aOffset) MOZ_OVERRIDE { return aOffset; }

    38   virtual int64_t GetCachedDataEnd(int64_t aOffset) MOZ_OVERRIDE { return GetLength(); }

    39   virtual bool IsDataCachedToEndOfResource(int64_t aOffset) MOZ_OVERRIDE { return false; }

    40   virtual bool IsSuspendedByCache() MOZ_OVERRIDE { return false; }

    41   virtual bool IsSuspended() MOZ_OVERRIDE { return false; }

    42   virtual nsresult ReadFromCache(char* aBuffer, int64_t aOffset, uint32_t aCount) MOZ_OVERRIDE { return NS_ERROR_FAILURE; }

    43   virtual nsresult Open(nsIStreamListener** aStreamListener) MOZ_OVERRIDE { return NS_ERROR_FAILURE; }

    45   virtual nsresult GetCachedRanges(nsTArray<MediaByteRange>& aRanges) MOZ_OVERRIDE

    46   {

    47     aRanges.AppendElement(MediaByteRange(0, GetLength()));

    48     return NS_OK;

    49   }

    51   virtual bool IsTransportSeekable() MOZ_OVERRIDE { return true; }

    52   virtual const nsCString& GetContentType() const MOZ_OVERRIDE { return mType; }

    54 private:

    55   virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE

    56   {

    57     size_t size = MediaResource::SizeOfExcludingThis(aMallocSizeOf);

    58     size += mType.SizeOfExcludingThisIfUnshared(aMallocSizeOf);

    60     return size;

    61   }

    63   virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE

    64   {

    65     return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);

    66   }

    68   const nsAutoCString mType;

    69 };

    71 } // namespace mozilla

    73 #endif /* MOZILLA_MEDIASOURCERESOURCE_H_ */

The Tor Browser / file revision

content/media/mediasource/MediaSourceResource.h@97036ab72558

content/media/mediasource/MediaSourceResource.h