/* ----------------------------------------------------------- *//*                                                             *//*                          ___                                *//*                       |_| | |_/   SPEECH                    *//*                       | | | | \   RECOGNITION               *//*                       =========   SOFTWARE                  */ /*                                                             *//*                                                             *//* ----------------------------------------------------------- *//*         Copyright: Microsoft Corporation                    *//*          1995-2000 Redmond, Washington USA                  *//*                    http://www.microsoft.com                 *//*                                                             *//*   Use of this software is governed by a License Agreement   *//*    ** See the file License for the Conditions of Use  **    *//*    **     This banner notice must not be removed      **    *//*                                                             *//* ----------------------------------------------------------- *//*      File: HAudio.c: Audio Input/Output Interface           *//* ----------------------------------------------------------- */char *haudio_version = "!HVER!HAudio:   3.2 [CUED 09/12/02]";char *haudio_vc_id = "$Id: HAudio.c,v 1.8 2002/12/19 16:37:11 ge204 Exp $";#include "HShell.h"        /* HTK Libraries */#include "HMem.h"#include "HMath.h"#include "HWave.h"#include "HAudio.h"/* ----------------------------- Trace Flags ------------------------- */static int trace = 0;#define T_TOP  0001     /* Top Level tracing */#define T_STC  0002     /* Trace Audio State Changes */#define T_DET  0004     /* Trace Detector State Changes */#define T_AUD  0010     /* Trace device dependent audio code */#define T_RUN  0020     /* Trace audio read/status *//* -------------------- Configuration Parameters --------------------- */static ConfParam *cParm[MAXGLOBS];       /* config parameters */static int numParm = 0;/* ---------------------------------------------------------- *//*    The type of audio device must be defined  - choices are      NO_AUDIO    - none      SGI_AUDIO   - SGI Indigo      SUN16_AUDIO - Sun 16-bit linear*/#ifdef USS_AUDIO#define OSS_AUDIO#endif#if !defined NO_AUDIO && !defined SGI_AUDIO && !defined SUN16_AUDIO && !defined SOLARIS16_AUDIO && !defined HPUX_AUDIO && !defined RS6000_AUDIO && !defined WIN95_AUDIO && !defined OSS_AUDIO && !defined HPRAW_AUDIO && !defined DEC_AUDIO && !defined WIN32_AUDIO && !defined EXT_FD_AUDIO #define NO_AUDIO#endif#ifdef WIN32_AUDIO#define MMAPI_AUDIO#include <windows.h>#include <mmsystem.h>#include <stdlib.h>    #include <search.h>    #endif#ifdef DEC_AUDIO#define MMAPI_AUDIO#include <mme/mme_api.h>#endif#ifdef RS6000_AUDIO#include <string.h>#include <fcntl.h>#include <UMSBAUDDevice.h>/* function return codes */#define rOK UMSAudioDevice_Success  #define rUR UMSAudioDevice_UnderRun#define rOR UMSAudioDevice_OverRun#ifdef AIX_3_2_5#define AUDIO_DEV "/dev/baud0"#else#define AUDIO_DEV "/dev/paud0"#endif#endif#ifdef SGI_AUDIO#include <audio.h>#include <unistd.h>#endif#ifdef SUN16_AUDIO#include <fcntl.h>#include <stropts.h>#include <sys/filio.h>#include <sun/audioio.h>  /* May be in sys in local configuration */#include <sys/ioctl.h>#define AUDIO_IODEV  "/dev/audioctl"#define AUDIO_IO     "/dev/audio"#endif#ifdef SOLARIS16_AUDIO#include <fcntl.h>#include <stropts.h>#include <sys/filio.h>#include <sys/audioio.h>  /* May be in sys in local configuration */#include <sys/ioctl.h>#define AUDIO_IODEV  "/dev/audioctl"#define AUDIO_IO     "/dev/audio"#define SUN16_AUDIO#endif#ifdef HPUX_AUDIO#include <fcntl.h>#include <sys/socket.h>#include <time.h>#include <sys/audio.h>/* to include audio library compile with:      -I/usr/include/audio for HPUX-9.x       -I/opt/audio/include for HPUX-10.x */#include <Alib.h>static Audio *audio_dev=NULL;static int audio_cnt=0;#endif#ifdef OSS_AUDIO#include <unistd.h>#include <fcntl.h>#include <sys/ioctl.h>#include <sys/soundcard.h>#define AUDIO_DEV "/dev/dsp"#define MIXER_DEV "/dev/mixer"#define AUDIO_RD 0x01#define AUDIO_WR 0x02#define BUF_SIZE 4096static short zero_buf[BUF_SIZE];static int audio_fd;static int mixer_fd;static unsigned short audio_io = 0x00;static int frag_size;static audio_buf_info audio_info;#endif/* Define the Audio Stream Information Records */#define AUDBUFSIZE   640000     /* size of audio buffer */typedef enum {   v_peak=1,   v_rms} VolType;static VolType volType = v_peak;static Boolean lineOut = TRUE;static Boolean phonesOut = TRUE;static Boolean speakerOut = FALSE;static Boolean lineIn = TRUE;static Boolean micIn = FALSE;static volatile Boolean stopSignalled;typedef enum { ADS_INIT, ADS_OPEN, ADS_SAMPLING,                ADS_STOPPED, ADS_CLOSED } AudioDevStatus;typedef struct {       /* circular buffer */   Boolean isActive;     /* true if in use */   short *data;          /* actual data buffer */   int inx,outx;         /* in/out indices - wrap modulo size */   int used,size;        /* used in data, size of data */}ReplayBuf;#ifdef MMAPI_AUDIO#define MMAPI_BUFFER_DURATION 0.2#define MMAPI_BUFFER_COUNT 12static DWORD sMagic=-1;typedef struct mmapibuf{   int index;             /* Index of buffer */   int size;              /* Size of buffer */   int n;                 /* Number of valid samples in buffer */   int cur;               /* Current sample index */   LPWAVEHDR waveHdr;     /* Pointer to WAVEHDR */   LPSTR waveData;        /* Data in buffer */   struct mmapibuf *next;   struct mmapibuf *prev;} mmApiBuf;#endiftypedef struct _AudioIn {   /* -- Machine Independent Part -- */   MemHeap *mem;             /* memory heap for this audio rec */   HTime sampPeriod;         /* sampling period in 100ns units */   int frSize;               /* num samples per speech frame */   int frRate;               /* num samples between speech frames */   short * frBuf;            /* buffer for constructing frames */   Vector frOLap;            /* frame overlap buffer used by GetAudio */   int inOLap;               /* num samples in frOLap */   AudioInStatus status;     /* current status of this audio stream */   short buffer[AUDBUFSIZE];   int bufferSize;           /* Size of audio buffer */   int nInBuffer;            /* Number of valid samples in buffer */   int inBufPos;             /* Position to write in to buffer */   int outBufPos;            /* Position to read out of buffer */   int sig;                  /* signal if any */   ReplayBuf rbuf;           /* replay buffer (if needed) */   AudioDevStatus isActive;  /* indicates when device active */   float curVol;             /* Current volume of input speech */   /* -- Machine Dependent Part -- */#ifdef MMAPI_AUDIO   MMRESULT mmError;   DWORD magic;             /* Magic number identifying this instance */   HWAVEIN waveIn;   LPPCMWAVEFORMAT waveFmt; /* Pointer to PCMWAVEFORMAT */   LPMMTIME wavePos;        /* Pointer to MMTIME */   int total;               /* Total number of samples queued */   int current;             /* Index of current buffer */   int bufSize;             /* Block size for each buffer */   mmApiBuf *qHead;         /* Head of buffer waiting to be filled list */   mmApiBuf *qTail;         /* Tail of buffer waiting to be filled list */   mmApiBuf *fHead;         /* Head of filled buffer list */   mmApiBuf *fTail;         /* Tail of filled buffer list */#ifdef WIN32_AUDIO   CRITICAL_SECTION c;   HANDLE callBackEvent;#endif#endif#ifdef RS6000_AUDIO   UMSBAUDDevice adevin;   UMSAudioDevice_ReturnCode rc;   Environment *evin;   long sw;   long osamples;            /* Sample rate */   char *obyte_order;   long lgain;   long rgain;   long channels ;   long bits ;   char inConn[30];   #endif#ifdef SGI_AUDIO   long params[2];           /* parameter array */   ALport recPort;           /* SGI audio port */   ALconfig config;          /* configuration record */#endif#ifdef SUN16_AUDIO   int numSamples;   int audio_ctld;   audio_info_t audio_info;#endif#ifdef HPUX_AUDIO   Audio *audio;   ATransID tid;   AudioAttributes attr;   SSRecordParams parms;   AGainEntry gains[4];   SStream stream;   int socket;#endif}AudioInRec;typedef struct _AudioOut {   /* -- Machine Independent Part -- */   MemHeap *mem;             /* memory heap for this audio rec */   float vol;                /* current volume */   Boolean isActive;         /* true when device active */   /* -- Machine Dependent Part -- */#ifdef MMAPI_AUDIO   MMRESULT mmError;   DWORD magic;             /* Magic number identifying this instance */   HWAVEOUT waveOut;   UINT waveOutDev;         /* Device being used for wave output */   LPPCMWAVEFORMAT waveFmt; /* Pointer to PCMWAVEFORMAT */   LPMMTIME wavePos;        /* Pointer to MMTIME */   int total;               /* Total number of samples queued */   int current;             /* Index of current buffer */   mmApiBuf *pHead;         /* Head of buffer list */   mmApiBuf *pTail;         /* Tail of buffer list */#ifdef WIN32_AUDIO   CRITICAL_SECTION c;   HANDLE callBackEvent;#endif#endif#ifdef RS6000_AUDIO   UMSBAUDDevice adevout;   UMSAudioDevice_ReturnCode rc;   Environment *evout;   long sw;   long osamples;            /* Sample rate */   char *obyte_order;   long lgain;   long rgain;   long channels ;   long bits ;   char outConn[30];   #endif#ifdef SGI_AUDIO   long params[6];           /* parameter array */   ALport playPort;          /* SGI audio port */   ALconfig config;          /* configuration record */#endif#ifdef SUN16_AUDIO   int numSamples;   int numWrites;   int audio_ctld;   audio_info_t audio_info;#endif#ifdef HPUX_AUDIO   Audio *audio;   ATransID tid;   int nToPlay;   AudioAttributes attr;   SSPlayParams parms;   AGainEntry gains[4];   SStream stream;   int socket;#endif}AudioOutRec;/* ------------------ Device Dependent Routines ----------------- *//* All device dependent parts of this module are in this section  *//* -------------------------------------------------------------- */#ifdef SUN16_AUDIO#define NUM_SAMP_FREQS 10static float sampFreqs[NUM_SAMP_FREQS] = {   8000, 9600, 11025, 16000, 18900, 22050, 32000, 37800, 44100, 48000};/* TrimSampFreq: find the nearest available sampling frequency */static int TrimSampFreq(int f){   int i, d;   int min, mi;     min = (int) fabs((double)(sampFreqs[0]-f)); mi = 0;   for (i=0; i<NUM_SAMP_FREQS; i++) {      d = (int) fabs((double)(sampFreqs[i]-f));      if (d < min) {         min = d; mi = i;      }   }   return (int) sampFreqs[mi];}#endif#ifdef OSS_AUDIO/* IsVAXOrder: returns true if machine has VAX ordered bytes */static Boolean IsVAXOrder(void){   short x, *px;   unsigned char *pc;      px = &x;   pc = (unsigned char *) px;   *pc = 1; *(pc+1) = 0;         /* store bytes 1 0 */   return x==1;          /* does it read back as 1? */}#endif/* CalcVolume: calculate volume of data */static float CalcVolume(short *data, int len){   float vol;   double sum, sqr;   int i, minSamp, maxSamp;      switch (volType) {   case v_rms:      sum=sqr=0.0;      for(i = 0; i < len; i++) {         sum += (double)data[i];         sqr += ((double)data[i]) * ((double)data[i]);      }      sum/=len; sqr/=len;      vol = sqrt(sqr-sum*sum);      break;   case v_peak:   default:      minSamp =maxSamp = data[0];      for(i = 0; i < len; i++) {         if ( data[i] > maxSamp )  maxSamp = data[i];         else if ( data[i] < minSamp )  minSamp = data[i];      }      vol = (maxSamp-minSamp)/2.0;      break;   }   return vol;}#ifdef MMAPI_AUDIO#ifdef WIN32_AUDIOvoid *mmeAllocMem(size_t size){   void *ptr;   ptr=GlobalAlloc(GMEM_FIXED,size);   if (ptr==NULL)      HError(6006,"StartAudi: Cannot allocate memory for mme structure");   return(ptr);}void *mmeAllocBuffer(size_t size){   void *ptr;   ptr=GlobalAlloc(GMEM_FIXED,size);   if (ptr==NULL)      HError(6006,"StartAudi: Cannot allocate memory for mme structure");   return(ptr);}Boolean mmeFreeMem(void *ptr){   ptr=GlobalFree(ptr);   return(TRUE);}Boolean mmeFreeBuffer(void *ptr){