void UpdateInfo()
{
string path = binding.GetAbsolutePath();
try
{
var fs = new FileStream(path, FileMode.Open, FileAccess.Read);
var reader = new BinaryReader(fs);
if (reader.ReadUInt32() != 0x46464952) // "RIFF"
{
throw new Exception();
}
reader.BaseStream.Seek(4, SeekOrigin.Current);
if (reader.ReadUInt32() != 0x45564157) // "WAVE"
{
throw new Exception();
}
ushort channels = 1;
uint sampleRate = 44100;
uint bytePerSec = sampleRate * 2;
while (true)
{
uint chunk = reader.ReadUInt32();
uint chunkSize = reader.ReadUInt32();
if (chunk == 0x20746D66) // "fmt "
{
reader.BaseStream.Seek(2, SeekOrigin.Current);
channels = reader.ReadUInt16();
sampleRate = reader.ReadUInt32();
bytePerSec = reader.ReadUInt32();
reader.BaseStream.Seek(-12, SeekOrigin.Current);
}
else if (chunk == 0x61746164) // "data"
{
ulong time = (ulong)chunkSize * 1000 / bytePerSec;
lbl_info1.Text = System.String.Format("[Format] {0}ch {1}Hz",
channels, sampleRate);
lbl_info2.Text = System.String.Format("[TotalTime] {0:00}:{1:00}.{2:00}",
time / 1000 / 60, time / 1000 % 60, time % 1000 / 10);
break;
}
reader.BaseStream.Seek(chunkSize, SeekOrigin.Current);
}
fs.Close();
fs.Dispose();
}
catch (Exception e)
{
}
}
void Read()
{
if (binding != null)
{
btn_load.Enabled = true;
lbl_file.Text = binding.GetRelativePath();
if (lbl_file.Text.Length > 0)
{
UpdatePreview(binding.GetAbsolutePath());
}
else
{
//this.Height = 20;
}
}
else
{
btn_load.Enabled = false;
lbl_file.Text = string.Empty;
lbl_info.Text = string.Empty;
pic_preview.Image = null;
}
}