src/audio/symbian/streamplayer.h

   1 #ifndef STREAMPLAYER_H
   2 #define STREAMPLAYER_H
   3
   4 #include <mdaaudiooutputstream.h>
   5
   6 const int KSilenceBuffer = 1024;
   7 const int KMaxVolume = 256;
   8
   9 class MStreamObs
  10 {
  11         public:
  12                 enum
  13                 {
  14                         EInit,
  15                         EPlay,
  16                         EWrite,
  17                         EClose,
  18                 };
  19                 virtual void Complete(int aState, int aError) = 0;
  20 };
  21
  22 class MStreamProvider
  23 {
  24         public:
  25                 virtual TPtrC8 Data() = 0;
  26 };
  27
  28 class CStreamPlayer : public CBase, public MMdaAudioOutputStreamCallback
  29 {
  30         public:
  31                 CStreamPlayer(MStreamProvider& aProvider, MStreamObs& aObs);
  32                 ~CStreamPlayer();
  33
  34                 static int ClosestSupportedRate(int aRate);
  35
  36                 int OpenStream(int aRate, int aChannels, TUint32 aType = KMMFFourCCCodePCM16);
  37
  38                 void SetVolume(int aNew);
  39                 int Volume() const              { return iVolume; }
  40
  41                 void Stop();
  42                 void Start();
  43                 void Open();
  44                 void Close();
  45
  46                 bool Playing() const    { return (iState & EInited) && (iState & EStarted); }
  47                 bool Closed() const     { return !(iState & EInited) && !(iState & EDied); }
  48
  49         private:
  50                 void MaoscOpenComplete(int aError);
  51                 void MaoscBufferCopied(int aError, const TDesC8& aBuffer);
  52                 void MaoscPlayComplete(int aError);
  53
  54                 void Request();
  55
  56                 MStreamProvider& iProvider;
  57                 MStreamObs& iObs;
  58                 int iVolume;
  59
  60                 CMdaAudioOutputStream* iStream;
  61
  62                 int iRate;
  63                 int iChannels;
  64                 TUint32 iType;
  65
  66                 enum
  67                 {
  68                         ENone           = 0,
  69                         EInited         = 0x1,
  70                         EStarted        = 0x2,
  71                         EStopped        = 0x4,
  72                         EVolumeChange   = 0x8,
  73                         EDied           = 0x10
  74                 };
  75
  76                 int iState;
  77                 TBuf8<KSilenceBuffer> iSilence;
  78                 TPtrC8 iPtr;
  79 };
  80
  81 #endif