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/******************************************************************************
* Backend.h **-----------** This is the header file for the CBackend implementation.*------------------------------------------------------------------------------* Copyright (C) 1999 Microsoft Corporation Date: 03/01/99* All Rights Reserved************************************************************************ MC ****/
#ifndef Backend_H
#define Backend_H
#ifndef ReverbFX_H
#include "ReverbFX.h"
#endif
#ifndef FeedChain_H
#include "FeedChain.h"
#endif
#ifndef __spttseng_h__
#include "spttseng.h"
#endif
#ifndef SPDebug_h
#include <spdebug.h>
#endif
#ifndef SPCollec_h
#include <SPCollec.h>
#endif
#include "SpTtsEngDebug.h"
static const short MAX_TARGETS_PER_UNIT = 3; // Max number of knots allowed
static const short MIN_VOICE_PITCH = 10; // Lowest voiced pitch (hertz)
static const short UNIT_SIL = 0; // Silence phon
static const short SPEECH_FRAME_SIZE = 5000; // Output audio uffer...
static const short SPEECH_FRAME_OVER = 1000; // ...plus pad
//----------------------------------------------------------
// find a yn corresponding to xn,
// given (x0, y0), (x1, y1), x0 <= xn <= x1
//----------------------------------------------------------
inline float LinInterp( float x0, float xn, float x1, float y0, float y1 ){ return y0 + (y1-y0)*(xn-x0)/(x1-x0);}
// Math marcos
#define ABS(x) ((x) >= 0 ? (x) : -(x))
#define MAX(x,y) (((x) >= (y)) ? (x) : (y))
#define MIN(x,y) (((x) <= (y)) ? (x) : (y))
static const float LINEAR_BKPT = 0.1f;static const float LOG_RANGE = (-25.0f);
//********************************************************************
//
// CBackend keeps track of all the state information for the
// synthesis process.
//
//********************************************************************
class CBackend {public: /*--- Constructors/Destructors ---*/ CBackend (); ~CBackend ();
/*=== Methods =======*/ HRESULT Init( IMSVoiceData* pVoiceDataObj, CFeedChain *pSrcObj, MSVOICEINFO* pVoiceInfo ); SPEECH_STATE GetSpeechState() {return m_SpeechState;} void PrepareSpeech( ISpTTSEngineSite* outputSite ); HRESULT RenderFrame( );
private: HRESULT StartNewUnit(); long ProsodyMod( UNITINFO *pCurUnit, long cInEpochs, float durationMpy, long cMaxOutEpochs); void CleanUpSynth(); void ResRecons( float *pInRes, long InSize, float *pOutRes, long OutSize, float scale ); void LPCFilter( float *pCurLPC, float *pCurRes, long len, float gain ); void FreeSynth( MSUNITDATA* pSynth ); void PSOLA_Stretch( float *pInRes, long InSize, float *pOutRes, long OutSize, float *pWindow, long cWindowSize ); void CvtToShort( float *pSrc, long blocksize, long stereoOut, float audioGain ); void Release( ); /*=== Member Data ===*/ CFeedChain *m_pSrcObj; // Backend gets its input from here
MSUNITDATA m_Synth; // Unit data from 'Voicedataobj'
float *m_pHistory; // LPC delays
unsigned long m_fModifiers; float *m_pHistory2; // IIR delays
float *m_pFilter; // IIR/FIR coefficients
long m_cNumTaps; // Coefficient count
LP_CReverbFX m_pReverb; // Reverb object
long *m_pMap; // in/out epoch map
float *m_pOutEpoch; // epoch sizes
short *m_pRevFlag; // true = rev unvoiced
float *m_pInRes; // m_pSynth.pRes
float *m_pInEpoch; // m_pSynth.pEpoch
float *m_pLPC; // m_pSynth->pLPC
long m_cOutSamples_Phon; // sample count
long m_durationTarget; // target sample total
long m_silMode; float *m_pSynthTime; // pCurUnit->pTime
float *m_pSynthAmp; // pCurUnit->pAmp
long m_nKnots; // pCurUnit->nKnots
SPEECH_STATE m_SpeechState; // Either continue or done
long m_cOutSamples_Frame; // Audio output sample count for frame
float *m_pSpeechBuf; // Audio output sample buffer
ULONG m_cOutSamples_Total; // Audio output sample count for Speak
long m_EpochIndex; // Index for render
long m_cOutEpochs; // Count for render
long m_vibrato_Phase1; // Current vibrato phase index
float m_VibratoDepth; // Vibrato gain
float m_VibratoFreq; // Vibrato speed
long m_StereoOut; // TRUE = stereo output
long m_BytesPerSample; // 2 = mono, 4 = stereo
IMSVoiceData* m_pVoiceDataObj; // Voice object
ULONG m_cOrder; // LPC filter order
float m_SampleRate; // I/O rate
float* m_pWindow; // Hanning Window
long m_FFTSize; // FFT length
// User Controls
float m_UnitVolume; // 0 - 1.0 (linear)
long m_MasterVolume; // 0 - 100 (linear)
float m_linearScale; // Linear taper region scale
// SAPI audio sink
ISpTTSEngineSite* m_pOutputSite; bool m_HasSpeech;};
//--------------------------------
// Unimplemented
//--------------------------------
static const long BACKEND_BITFLAG_WHISPER = (1 << 0);static const long BACKEND_BITFLAG_FIR = (1 << 1);static const long BACKEND_BITFLAG_IIR = (1 << 2);static const long BACKEND_BITFLAG_REVERB = (1 << 3);static const float VIBRATO_DEFAULT_DEPTH = 0.05f;static const float VIBRATO_DEFAULT_FREQ = 3.0f; // hz
#endif //--- This must be the last line in the file
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