The Tor Browser: content/media/apple/AppleMP3Reader.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 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef __AppleMP3Reader_h__

     6 #define __AppleMP3Reader_h__

     8 #include "MediaDecoderReader.h"

     9 #include "MP3FrameParser.h"

    10 #include "VideoUtils.h"

    12 #include <AudioToolbox/AudioToolbox.h>

    14 namespace mozilla {

    16 class AppleMP3Reader : public MediaDecoderReader

    17 {

    18 public:

    19   AppleMP3Reader(AbstractMediaDecoder *aDecoder);

    20   virtual ~AppleMP3Reader() MOZ_OVERRIDE;

    22   virtual nsresult Init(MediaDecoderReader* aCloneDonor) MOZ_OVERRIDE;

    24   nsresult PushDataToDemuxer();

    26   virtual bool DecodeAudioData() MOZ_OVERRIDE;

    27   virtual bool DecodeVideoFrame(bool &aKeyframeSkip,

    28                                 int64_t aTimeThreshold) MOZ_OVERRIDE;

    30   virtual bool HasAudio() MOZ_OVERRIDE;

    31   virtual bool HasVideo() MOZ_OVERRIDE;

    33   virtual nsresult ReadMetadata(MediaInfo* aInfo,

    34                                 MetadataTags** aTags) MOZ_OVERRIDE;

    36   virtual nsresult Seek(int64_t aTime,

    37                         int64_t aStartTime,

    38                         int64_t aEndTime,

    39                         int64_t aCurrentTime) MOZ_OVERRIDE;

    41   void AudioSampleCallback(UInt32 aNumBytes,

    42                            UInt32 aNumPackets,

    43                            const void *aData,

    44                            AudioStreamPacketDescription *aPackets);

    46   void AudioMetadataCallback(AudioFileStreamID aFileStream,

    47                              AudioFileStreamPropertyID aPropertyID,

    48                              UInt32 *aFlags);

    50   virtual void NotifyDataArrived(const char* aBuffer,

    51                                  uint32_t aLength,

    52                                  int64_t aOffset) MOZ_OVERRIDE;

    54 private:

    55   void SetupDecoder();

    56   nsresult Read(uint32_t *aNumBytes, char *aData);

    58   static OSStatus PassthroughInputDataCallback(AudioConverterRef aAudioConverter,

    59                                                UInt32 *aNumDataPackets,

    60                                                AudioBufferList *aData,

    61                                                AudioStreamPacketDescription **aPacketDesc,

    62                                                void *aUserData);

    64   // Initialisation has to be done in a callback, so we store the result here.

    65   bool mStreamReady;

    67   // Number of audio samples in an audio packet. Constant over all packets in a

    68   // stream.

    69   UInt32 mAudioFramesPerCompressedPacket;

    70   // Store the next audio frame to be played; so we can keep time when seeking.

    71   UInt64 mCurrentAudioFrame;

    72   UInt32 mAudioChannels;

    73   UInt32 mAudioSampleRate;

    75   uint64_t mDuration;

    77   AudioFileStreamID mAudioFileStream;

    78   AudioConverterRef mAudioConverter;

    80   MP3FrameParser mMP3FrameParser;

    81 };

    83 } // namespace mozilla

    85 #endif // __AppleMP3Reader_h__

The Tor Browser / file revision

content/media/apple/AppleMP3Reader.h@97036ab72558

content/media/apple/AppleMP3Reader.h