已封装成一个类TSoundFile,语音数据为原始pcm,来源于网络。
wav的 pcm格式语音文件由44字节的文件头和语音波形数据组成。
unit uSoundFile;
interface
uses
WINDOWS,DirectSound, MMSystem,classes,ActiveX, SysUtils;
type
TWaveHeader = record //wav文件头
Riff_ckid : DWORD;
Riff_cksize : DWORD;
Riff_fccType : DWORD;
fmt_ckid : DWORD;
fmt_cksize : DWORD;
wFormatTag : Word;
nChannels : Word;
nSamplesPerSec : DWORD;
nAvgBytesPerSec: DWORD;
nBlockAlign : Word;
wBitsPerSample : Word;
data_ckid : DWORD;
data_cksize : DWORD;
end;
TSoundFile = class //
private
mFilename:string; //保存的文件名
mChanel:Word; //语音通道数:1单声道;2双声道;
mRate:Word; //采样率:常用44100(CD音质),22050,8000
mBits:Word; //位深;常用16bits,8bits。
mWaveHeader:TWaveHeader;
mFileStream:TFileStream;
mPos:integer;//数据指针
functio