content/media/apple/AppleMP3Reader.h

   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/. */
   4
   5 #ifndef __AppleMP3Reader_h__
   6 #define __AppleMP3Reader_h__
   7
   8 #include "MediaDecoderReader.h"
   9 #include "MP3FrameParser.h"
  10 #include "VideoUtils.h"
  11
  12 #include <AudioToolbox/AudioToolbox.h>
  13
  14 namespace mozilla {
  15
  16 class AppleMP3Reader : public MediaDecoderReader
  17 {
  18 public:
  19   AppleMP3Reader(AbstractMediaDecoder *aDecoder);
  20   virtual ~AppleMP3Reader() MOZ_OVERRIDE;
  21
  22   virtual nsresult Init(MediaDecoderReader* aCloneDonor) MOZ_OVERRIDE;
  23
  24   nsresult PushDataToDemuxer();
  25
  26   virtual bool DecodeAudioData() MOZ_OVERRIDE;
  27   virtual bool DecodeVideoFrame(bool &aKeyframeSkip,
  28                                 int64_t aTimeThreshold) MOZ_OVERRIDE;
  29
  30   virtual bool HasAudio() MOZ_OVERRIDE;
  31   virtual bool HasVideo() MOZ_OVERRIDE;
  32
  33   virtual nsresult ReadMetadata(MediaInfo* aInfo,
  34                                 MetadataTags** aTags) MOZ_OVERRIDE;
  35
  36   virtual nsresult Seek(int64_t aTime,
  37                         int64_t aStartTime,
  38                         int64_t aEndTime,
  39                         int64_t aCurrentTime) MOZ_OVERRIDE;
  40
  41   void AudioSampleCallback(UInt32 aNumBytes,
  42                            UInt32 aNumPackets,
  43                            const void *aData,
  44                            AudioStreamPacketDescription *aPackets);
  45
  46   void AudioMetadataCallback(AudioFileStreamID aFileStream,
  47                              AudioFileStreamPropertyID aPropertyID,
  48                              UInt32 *aFlags);
  49
  50   virtual void NotifyDataArrived(const char* aBuffer,
  51                                  uint32_t aLength,
  52                                  int64_t aOffset) MOZ_OVERRIDE;
  53
  54 private:
  55   void SetupDecoder();
  56   nsresult Read(uint32_t *aNumBytes, char *aData);
  57
  58   static OSStatus PassthroughInputDataCallback(AudioConverterRef aAudioConverter,
  59                                                UInt32 *aNumDataPackets,
  60                                                AudioBufferList *aData,
  61                                                AudioStreamPacketDescription **aPacketDesc,
  62                                                void *aUserData);
  63
  64   // Initialisation has to be done in a callback, so we store the result here.
  65   bool mStreamReady;
  66
  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;
  74
  75   uint64_t mDuration;
  76
  77   AudioFileStreamID mAudioFileStream;
  78   AudioConverterRef mAudioConverter;
  79
  80   MP3FrameParser mMP3FrameParser;
  81 };
  82
  83 } // namespace mozilla
  84
  85 #endif // __AppleMP3Reader_h__