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c#获取wave文件文件头信息
前些日子在论坛里问了，没人回答，今天有空自己写了一下
文件格式依据网站
http://www.moon-soft.com/program/format/
using system;
using system.io;
using system.text;
namespace wav
{
/// <summary>
/// summary description for wav.
/// </summary>
public class wav
{
public wav()
{
//
// todo: add constructor logic here
//
}
[stathread]
static void main(string[] args)
{
//
// todo: add code to start application here
//
string strpath=@"c:\documents and settings\administrator\桌面\trojan\怀念战友.wav";//=@"f:\music";
if(args.length>0)
{
strpath=args[0].trim();
}
if(file.exists(strpath))
{
getwavinfo(strpath);
console.writeline("getwavinfo successfully!");
//console.writeline("");
}
else
{
console.write("please enter the write filepath!\n");
console.write("用法: wav [full path of your wav filepath]");
}
}
public struct wavinfo
{
public string groupid;
public string rifftype;
public long filesize;
public string chunkid;
public long chunksize;
public short wformattag; //记录着此声音的格式代号，例如wave_format_pcm，wave_f0ram_adpcm等等。
public ushort wchannels; //记录声音的频道数。
public ulong dwsamplespersec;//记录每秒取样数。
public ulong dwavgbytespersec;//记录每秒的数据量。
public ushort wblockalign;//记录区块的对齐单位。
public ushort wbitspersample;//记录每个取样所需的位元数。
public string datachunkid;
public long datasize;
}
public static void getwavinfo(string strpath)
{
wavinfo wavinfo = new wavinfo();
fileinfo fi = new fileinfo(strpath);
system.io.filestream fs=fi.openread();
if(fs.length>=44)
{
byte[] binfo=new byte[44];
fs.read(binfo,0,44);
system.text.encoding.default.getstring(binfo,0,4);
if(system.text.encoding.default.getstring(binfo,0,4)=="riff"&&system.text.encoding.default.getstring(binfo,8,4)=="wave"&&system.text.encoding.default.getstring(binfo,12,4)=="fmt ")
{
wavinfo.groupid = system.text.encoding.default.getstring(binfo,0,4);
system.bitconverter.toint32(binfo,4);
wavinfo.filesize = system.bitconverter.toint32(binfo,4);
//wavinfo.filesize = convert.toint64(system.text.encoding.default.getstring(binfo,4,4));
wavinfo.rifftype = system.text.encoding.default.getstring(binfo,8,4);
wavinfo.chunkid = system.text.encoding.default.getstring(binfo,12,4);
wavinfo.chunksize = system.bitconverter.toint32(binfo,16);
wavinfo.wformattag = system.bitconverter.toint16(binfo,20);
wavinfo.wchannels = system.bitconverter.touint16(binfo,22);
wavinfo.dwsamplespersec = system.bitconverter.touint32(binfo,24);
wavinfo.dwavgbytespersec = system.bitconverter.touint32(binfo,28);
wavinfo.wblockalign = system.bitconverter.touint16(binfo,32);
wavinfo.wbitspersample = system.bitconverter.touint16(binfo,34);
wavinfo.datachunkid = system.text.encoding.default.getstring(binfo,36,4);
wavinfo.datasize = system.bitconverter.toint32(binfo,40);
system.console.writeline("groupid:"+wavinfo.groupid);
system.console.writeline("filesize:"+wavinfo.filesize);
system.console.writeline("rifftype:"+wavinfo.rifftype);
system.console.writeline("chunkid:"+wavinfo.chunkid);
system.console.writeline("chunksize:"+wavinfo.chunksize);
system.console.writeline("wformattag:"+wavinfo.wformattag);
system.console.writeline("wchannels:"+wavinfo.wchannels);
system.console.writeline("dwsamplespersec:"+wavinfo.dwsamplespersec);
system.console.writeline("dwavgbytespersec:"+wavinfo.dwavgbytespersec);
system.console.writeline("wblockalign:"+wavinfo.wblockalign);
system.console.writeline("wbitspersample:"+wavinfo.wbitspersample);
system.console.writeline("datachunkid:"+wavinfo.datachunkid);
system.console.writeline("datasize:"+wavinfo.datasize);
}
}
}
}
}
