src/Sound/VoiceSynthesizer.hxx

   1 /*
   2  * VoiceSynthesizer.hxx
   3  *
   4  *  Created on: Apr 24, 2014
   5  *      Author: flightgear
   6  */
   7
   8 #ifndef VOICESYNTHESIZER_HXX_
   9 #define VOICESYNTHESIZER_HXX_
  10
  11 #include <simgear/sound/sample_openal.hxx>
  12 #include <simgear/threads/SGQueue.hxx>
  13
  14 #include <string>
  15 struct _Flite_HTS_Engine;
  16
  17 /**
  18  * A Voice Synthesizer Interface
  19  */
  20 class VoiceSynthesizer {
  21 public:
  22   virtual ~VoiceSynthesizer() {};
  23   virtual SGSoundSample * synthesize( const std::string & text ) = 0;
  24 };
  25
  26 class SoundSampleReadyListener {
  27 public:
  28   virtual ~SoundSampleReadyListener() {}
  29   virtual void SoundSampleReady( SGSharedPtr<SGSoundSample> ) = 0;
  30 };
  31
  32 struct SynthesizeRequest {
  33   SynthesizeRequest() {
  34     speed = volume = pitch = 1.0;
  35     listener = NULL;
  36   }
  37   SynthesizeRequest( const SynthesizeRequest & other ) {
  38     text = other.text;
  39     speed = other.speed;
  40     volume = other.volume;
  41     pitch = other.pitch;
  42     listener = other.listener;
  43   }
  44
  45   SynthesizeRequest & operator = ( const SynthesizeRequest & other ) {
  46     text = other.text;
  47     speed = other.speed;
  48     volume = other.volume;
  49     pitch = other.pitch;
  50     listener = other.listener;
  51     return *this;
  52   }
  53
  54   std::string text;
  55   double speed;
  56   double volume;
  57   double pitch;
  58   SoundSampleReadyListener * listener;
  59 };
  60
  61 /**
  62  * A Voice Synthesizer using FLITE+HTS
  63  */
  64 class FLITEVoiceSynthesizer : public VoiceSynthesizer {
  65 public:
  66   FLITEVoiceSynthesizer( const std::string & voice );
  67   ~FLITEVoiceSynthesizer();
  68   virtual SGSoundSample * synthesize( const std::string & text );
  69
  70   virtual void synthesize( SynthesizeRequest & request );
  71 private:
  72   struct _Flite_HTS_Engine * _engine;
  73
  74   class WorkerThread;
  75   WorkerThread * _worker;
  76
  77   typedef SGBlockingQueue<SynthesizeRequest> SynthesizeRequestList;
  78   SynthesizeRequestList _requests;
  79
  80   double _volume;
  81   bool   _keepScratchFile;
  82 };
  83
  84 #endif /* VOICESYNTHESIZER_HXX_ */