C语言使用libZPlay录制声音并写到文件的方法

/**
 *  Record samples from line-in and save to out.mp3
 *
 */
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <olectl.h>
#include <ole2.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#include <dos.h>
#include <conio.h>
#include "../include/libzplay.h"
using namespace libZPlay;
ZPlay* player;
int nRate = 100;
int nPitch = 100;
int nTempo = 100;
int fCenterCut = 0;
int fSideCut = 0;
int fMixChannels = 0;
int lVolume = 100;
int rVolume = 100;
int fPause = 0;
int fEcho = 0;
int fEq = 0;
int fReverse = 0;
TStreamStatus status;
TStreamTime pos;
int main(int argc,char **argv)
{
  // clear screen
  system("CLS");
  // create class instance
  player = CreateZPlay();
  // chek if we have class instance
  if(player == 0)
  {
    printf("Error: Can't create class instance !nPress key to exit.n");
    getch();
    return 0;  
  }
  // get library version
  int ver = player->GetVersion();
  // check if we have version 2.00 and above
  if(ver < 200)
  {
    printf("Error: Need library version 2.00 and above !nPress key to exit.rn");
    getch();
    player->Release();
    return 0;
  }
  // display version info
  printf("libZPlay v.%i.%02irnrn",ver / 100,ver % 100);
  printf( "x: play  tj: fade out  ti: side cut  td: pitch downrn"
        "c: pause  tk: fade in  to: center cut tf: pitch uprn"
        "v: stop  tl: loop    tn: volume downtg: tempo downrn"
        "y: rew   tp: equalizer tm: volume up th: tempo uprn"
        "b: fwd   te: echo    ta: rate down rn"
        "r: reverse tt: channel mixts: rate up  tq: quitrnrn");
    // open wavein using Line In
    if(player->OpenFile("wavein://src=line;volume=50;",sfAutodetect) == 0)
    {
      printf("Error: %snPress key to exit.rn",player->GetError());
      getch();
      player->Release();
      return 0;
    }
    // set wave output to disk file,mp3 encoding
    if(player->SetWaveOutFile("out.mp3",sfMp3,1) == 0)
    {
      printf("Error: %snPress key to exit.rn",player->GetError());
      getch();
      player->Release();
      return 0;
    }
  // get stream info
  TStreamInfo pInfo;
  player->GetStreamInfo(&pInfo);
  // display info about stream
  char *sVbr = "CBR";
  if(pInfo.VBR)
    sVbr = "VBR";
   printf("rn%s %i Hz %s Channel: %u Length: %02i:%02i:%02i:%02irnrn",pInfo.Description,pInfo.SamplingRate,sVbr,pInfo.ChannelNumber,pInfo.Length.hms.hour,pInfo.Length.hms.minute,pInfo.Length.hms.second,pInfo.Length.hms.millisecond);
  printf("Status| kbps | POS: |Echo|Equ|Cut|Fade|Rev|Rate|Pitch|Tempo|Vol|Loop|Ch mix|rn");
  // start playing
  if(player->Play() == 0)
  {
    printf("Error: %snPress key to exit.rn",player->GetError());
    player->Release(); // delete ZPlay class
    return 0;
  }
  while(1)
  {
    // get current status
     player->GetStatus(&status); 
    char *st = 0;
    if(status.fPlay)
      st = "Play ";
    else if(status.fPause)
      st = "Pause";
    else
      st = "Stop ";    
    // get current position
    player->GetPosition(&pos);
     printf("%s  %04i %02i:%02i:%02i  %i  %i  %i  %i  %i  %03i %03i  %03i %03i  %i  %ir",st,player->GetBitrate(0),pos.hms.hour,pos.hms.minute,pos.hms.second,status.fEcho,status.fEqualizer,status.fVocalCut,status.fSlideVolume,status.fReverse,player->GetRate(),player->GetPitch(),player->GetTempo(),lVolume,status.nLoop,fMixChannels
        );
    if(kbhit())
    {
      int a = getch();
      switch(a)
      {
        case 'i':  // side cut
          fSideCut = !fSideCut;
          player->StereoCut(fSideCut,1,0);
          fCenterCut = 0;
        break;
        case 'o':  // center
          fCenterCut = !fCenterCut;
          player->StereoCut(fCenterCut,0);
          fSideCut = 0;
        break;
        case 's':  // higher rate
          nRate += 5;
          player->SetRate(nRate);
        break;
        case 'a':  // lower rate
          nRate -= 5;
          if(nRate < 0)
            nRate = 0;
          player->SetRate(nRate);
        break;
        case 'd':  // lower pitch
          nPitch -= 5;
          if(nPitch < 0)
            nPitch = 0;
          player->SetPitch(nPitch);
        break;
        case 'f':  // higher pitch
          nPitch += 5;
          player->SetPitch(nPitch);
        break;
        case 'g':  // lower tempo
          nTempo -= 5;
          if(nTempo < 0)
            nTempo = 0;
          player->SetTempo(nTempo);
        break;
        case 'h':  // higher tempo
          nTempo += 5;
          player->SetTempo(nTempo);
        break;
        case 'r':  // reverse mode
          fReverse = !fReverse;
          if(player->ReverseMode(fReverse) == 0)
          {
            printf("Error: %sn",player->GetError());
            fReverse = 0;
          }
        break;
        case 'p':  // enable or disable equalizer
        {
          fEq = !fEq;
          player->EnableEqualizer(fEq);
          if(fEq)
          {
            player->SetEqualizerPreampGain(-100000);
            player->SetEqualizerBandGain(0,104000);
            player->SetEqualizerBandGain(1,104000);
            player->SetEqualizerBandGain(2,104000);
          }
        }
        break;
        case 'l': // play loop
        {
          TStreamTime pCurrentTime;
          player->GetPosition(&pCurrentTime);
          TStreamTime pEndTime;
          pEndTime.ms = pCurrentTime.ms + 5000;
          player->PlayLoop(tfMillisecond,&pCurrentTime,tfMillisecond,&pEndTime,5,1);
        }
        break;
        case 'j': // fade out volume
        {
          TStreamTime start;
          TStreamTime end;
          player->GetPosition(&start);
          end.sec = start.sec + 5;
          player->SlideVolume( tfSecond,&start,100,tfSecond,&end,0);
        }
        break;
        case 'k': // fade in volume
        {
          TStreamTime start;
          player->GetPosition(&start);
          TStreamTime end;
          end.sec = start.sec + 5;
          player->SlideVolume( tfSecond,100);
        }
        break;
        case 'e': // enable echo
        {
          fEcho = !fEcho;
          player->EnableEcho(fEcho);
        }
        break;
        case 'x': // play
          if(player->Play() == 0)
            printf("Err: %sn",player->GetError());
          fPause = 0;
        break;
        case 'v': // stop
          player->Stop();
          fPause = 0;
        break;
        case 'c':  // pause
          if(fPause)
          {
            player->Resume();
            fPause = 0;
          }
          else
          {
            player->Pause();
            fPause = 1;
          }
        break;
        case 'y': // jump back 5 seconds
        {
          TStreamTime pTime;
          pTime.sec = 5;
          player->Seek(tfSecond,&pTime,smFromCurrentBackward);
        }
        break;
        case 'b': // jump forward 5 seconds
        {
          TStreamTime pTime;
          pTime.sec = 5;
          player->Seek(tfSecond,smFromCurrentForward);
        }
        break;
        case 't':
        {
          // mix stereo channels to mono
          fMixChannels = !fMixChannels;
          player->MixChannels(fMixChannels,50,50);
        }
        break;
        case 'n':  // volume down
          if(lVolume >= 5)
            lVolume -= 5;
          if(rVolume >= 5)
            rVolume -= 5;
          player->SetMasterVolume(lVolume,rVolume);
        break;
        case 'm':  // volume up
          if(lVolume <= 95)
            lVolume += 5;
          if(rVolume <= 95)
            rVolume += 5;
          player->SetMasterVolume(lVolume,rVolume);
        break;
        case 'q':
        case 'Q':
          player->Release();  
        return 0; 
      }
    }
    Sleep(50);
  }
}