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./r/n");    getch();    player->Release();    return 0;  }  // display version info  printf("libZPlay v.%i.%02i/r/n/r/n", ver / 100, ver % 100);  printf( "x: play  /tj: fade out  /ti: side cut  /td: pitch down/r/n"        "c: pause  /tk: fade in  /to: center cut /tf: pitch up/r/n"        "v: stop  /tl: loop    /tn: volume down/tg: tempo down/r/n"        "y: rew   /tp: equalizer /tm: volume up /th: tempo up/r/n"        "b: fwd   /te: echo    /ta: rate down /r/n"        "r: reverse /tt: channel mix/ts: rate up  /tq: quit/r/n/r/n");    // open wavein using Line In    if(player->OpenFile("wavein://src=line;volume=50;", sfAutodetect) == 0)    {      printf("Error: %s/nPress key to exit./r/n", 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: %s/nPress key to exit./r/n", 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("/r/n%s %i Hz %s Channel: %u Length: %02i:%02i:%02i:%02i/r/n/r/n",      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|/r/n");  // start playing  if(player->Play() == 0)  {    printf("Error: %s/nPress key to exit./r/n", 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  %i/r",         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, 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: %s/n", 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, 100,100, tfSecond, &end, 0,0);        }        break;        case 'k': // fade in volume        {          TStreamTime start;          player->GetPosition(&start);          TStreamTime end;          end.sec = start.sec + 5;          player->SlideVolume( tfSecond, &start, 0,0, tfSecond, &end, 100, 100);        }        break;        case 'e': // enable echo        {          fEcho = !fEcho;          player->EnableEcho(fEcho);        }        break;        case 'x': // play          if(player->Play() == 0)            printf("Err: %s/n", 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, &pTime, 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);  }}