C语言使用libZPlay录制声音并写到文件的方法

本文实例讲述了C语言使用libZPlay 录制声音并写到文件的方法。分享给大家供大家参考。具体实现方法如下：

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/**

* 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);

// 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);

}

希望本文所述对大家的C语言程序设计有所帮助。

C语言使用libZPlay录制声音并写到文件的方法

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