private void bgWorker_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
{
const int COPY_LEN = 50 * 1024;
BackgroundWorker worker = sender as BackgroundWorker;
string[] files = (string[])e.Argument;
try {
using (RiffReader rr = new RiffReader(files[0]))
using (RiffWriter rw = new RiffWriter(files[1])) {
// 読み取りファイル解析
bool b = rr.Parse();
if (!b)
{
e.Result = -2;
return;
}
WaveFormatEx wf = rr.WaveFormat;
// 拡張ヘッダーを無効化できる条件
if (wf.Channels <= 2 && wf.Extensible && wf.BitsPerSample != 32)
{
wf.Extensible = false;
wf.FormatTag = WaveFormatTag.PCM;
}
// ヘッダーの書き出し
b = rw.WriteHeader(wf);
if (!b)
{
e.Result = -1;
return;
}
// ループ回数を計算。進捗にも使う
long max = rr.Length / COPY_LEN;
if ((rr.Length % COPY_LEN) > 0)
{
max++;
}
for (long i = 0; i < max; i++)
{
byte[] arr = rr.Read8(COPY_LEN);
if (!rw.WriteStream8(arr))
{
e.Result = -1;
return;
}
int percentage = (int)((i + 1) * 100 / max);
worker.ReportProgress(percentage);
}
if (!rw.WriteFinalize())
{
return;
}
}
} catch {
// エラー
e.Result = -3;
return;
}
e.Result = 0;
}
