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delphi 录音制作 wav 文件

作者:admin 来源: 日期:2013/11/12 11:08:01 人气: 标签:

 
//使用窗口接受音频设备发出的消息:

unit Unit1; 
 
interface 
 
uses 
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
 Dialogs, StdCtrls; 
 
type 
 TForm1 = class(TForm) 
  Button1: TButton; 
  Button2: TButton; 
  Button3: TButton; 
  procedure FormCreate(Sender: TObject); 
  procedure Button1Click(Sender: TObject); 
  procedure Button2Click(Sender: TObject); 
  procedure Button3Click(Sender: TObject); 
 protected 
  procedure WndProc(var m: TMessage); override; 
 end; 
 
var 
 Form1: TForm1; 
 
implementation 
 
{$R *.dfm}  
 
uses MMSystem; 
 
var 
 whIn1,whIn2, whOut: TWaveHdr; 
 hWaveIn,hWaveOut: HWAVE; 
 fmt: TWaveFormatEx; 
 buf1,buf2,SaveBuf: TBytes; 
 
procedure TForm1.FormCreate(Sender: TObject); 
begin 
 Button1.Caption := '开始录音'; 
 Button2.Caption := '停止录音'; 
 Button3.Caption := '播放录音'; 
end; 
 
//开始录音 
procedure TForm1.Button1Click(Sender: TObject); 
begin 
 {指定要录制的格式} 
 fmt.wFormatTag := WAVE_FORMAT_PCM; 
 fmt.nChannels := 2; 
 fmt.nSamplesPerSec := 22050; 
 fmt.nAvgBytesPerSec := 88200; 
 fmt.nBlockAlign := 4; 
 fmt.wBitsPerSample := 16; 
 fmt.cbSize := 0; 
 
 SaveBuf := nil; {清除已录制的内容} 
 
 if waveInOpen(@hWaveIn, WAVE_MAPPER, @fmt, Handle, 0, CALLBACK_WINDOW) = 0 then 
 begin 
  SetLength(buf1, 1024*8); 
  SetLength(buf2, 1024*8); 
 
  whIn1.lpData := PAnsiChar(buf1); 
  whIn1.dwBufferLength := Length(buf1); 
  whIn1.dwBytesRecorded := 0; 
  whIn1.dwUser := 0; 
  whIn1.dwFlags := 0; 
  whIn1.dwLoops := 0; 
  whIn1.lpNext := nil; 
  whIn1.reserved := 0; 
 
  whIn2.lpData := PAnsiChar(buf2); 
  whIn2.dwBufferLength := Length(buf2); 
  whIn2.dwBytesRecorded := 0; 
  whIn2.dwUser := 0; 
  whIn2.dwFlags := 0; 
  whIn2.dwLoops := 0; 
  whIn2.lpNext := nil; 
  whIn2.reserved := 0; 
 
  waveInPrepareHeader(hWaveIn, @whIn1, SizeOf(TWaveHdr)); 
  waveInPrepareHeader(hWaveIn, @whIn2, SizeOf(TWaveHdr)); 
  waveInAddBuffer(hWaveIn, @whIn1, SizeOf(TWaveHdr)); 
  waveInAddBuffer(hWaveIn, @whIn2, SizeOf(TWaveHdr)); 
 
  waveInStart(hWaveIn); 
 end; 
end; 
 
//停止录音 
procedure TForm1.Button2Click(Sender: TObject); 
begin 
 waveInStop(hWaveIn); 
 waveInUnprepareHeader(hWaveIn, @whIn1, SizeOf(TWaveHdr)); 
 waveInUnprepareHeader(hWaveIn, @whIn2, SizeOf(TWaveHdr)); 
 waveInClose(hWaveIn); 
end; 
 
//播放录音 
procedure TForm1.Button3Click(Sender: TObject); 
begin 
 whOut.lpData := PAnsiChar(SaveBuf); 
 whOut.dwBufferLength := Length(SaveBuf); 
 whOut.dwBytesRecorded := 0; 
 whOut.dwUser := 0; 
 whOut.dwFlags := 0; 
 whOut.dwLoops := 1; 
 whOut.lpNext := nil; 
 whOut.reserved := 0; 
 
 waveOutOpen(@hWaveOut, WAVE_MAPPER, @fmt, Handle, 0, CALLBACK_WINDOW); 
 waveOutPrepareHeader(hWaveOut, @whOut, SizeOf(TWaveHdr)); 
 waveOutWrite(hWaveOut, @whOut, SizeOf(TWaveHdr)); 
end; 
 
procedure TForm1.WndProc(var m: TMessage); 
var 
 ordLen: Integer; 
begin 
 inherited; 
 case m.Msg of 
  {处理录音消息} 
  MM_WIM_OPEN: ;   {此消息只携带了设备句柄} 
  MM_WIM_CLOSE: ;  {此消息只携带了设备句柄} 
  MM_WIM_DATA: begin {此消息携带了设备句柄和 WaveHdr 指针(LParam)} 
   {保存录制的数据} 
   ordLen := Length(SaveBuf); 
   SetLength(SaveBuf, ordLen + PWaveHdr(m.LParam).dwBytesRecorded); 
   CopyMemory(Ptr(DWORD(SaveBuf)+ordLen), PWaveHdr(m.LParam).lpData, PWaveHdr(m.LParam).dwBytesRecorded); 
   {继续录制} 
   waveInAddBuffer(hWaveIn, PWaveHdr(m.LParam), SizeOf(TWaveHdr)); 
  end; 
 
  {处理播放消息} 
  MM_WOM_OPEN: ;   {此消息只携带了设备句柄} 
  MM_WOM_CLOSE: ;  {此消息只携带了设备句柄} 
  MM_WOM_DONE: begin {此消息携带了设备句柄和 WaveHdr 指针(LParam)} 
   waveOutUnprepareHeader(hWaveOut, PWaveHdr(m.LParam), SizeOf(TWaveHdr)); 
   waveOutClose(hWaveOut); 
  end; 
 end; 
end; 
 
end.