private void Preview_button_Click(object sender, EventArgs e)
{
Dettach();
RunSox();
if (!File.Exists(this.TempFilename))
{
PreviewResult.Text = R._("");
return;
}
long fromFileSize = U.GetFileSize(this.FromFilename);
long tempFileSize;
string playTempWave;
string ext = U.GetFilenameExt(this.TempFilename);
if (ext == ".S")
{
byte[] dpcmBin;
string error = SongUtil.LoadWavS(this.TempFilename, out dpcmBin);
if (error != "")
{
PreviewResult.Text = error;
return;
}
tempFileSize = dpcmBin.Length;
byte[] uncmpWavBin = SongUtil.byteToWavForDPCM(dpcmBin, 0);
this.TempFilename2 = U.mktemp(".wav");
File.WriteAllBytes(this.TempFilename2, uncmpWavBin);
playTempWave = this.TempFilename2;
double snr = SongUtil.CalculateSNR(this.UncompressWavBIN, uncmpWavBin);
string str = R._("ファイルサイズ {0} -> {1} ({2}%)\r\n圧縮品質 SNR: {3}dB (高いほど良い。20dB以下は圧縮を使わない方がいいかも。)", fromFileSize, tempFileSize,
Math.Round(tempFileSize * 100 / (double)fromFileSize, 2), Math.Round(snr, 3));
PreviewResult.Text = str;
}
else if (ext == ".DPCM")
{
byte[] dpcmBin = File.ReadAllBytes(this.TempFilename);
tempFileSize = dpcmBin.Length;
byte[] uncmpWavBin = SongUtil.byteToWavForDPCM(dpcmBin, 0);
this.TempFilename2 = U.mktemp(".wav");
File.WriteAllBytes(this.TempFilename2, uncmpWavBin);
playTempWave = this.TempFilename2;
double snr = SongUtil.CalculateSNR(this.UncompressWavBIN, uncmpWavBin);
string str = R._("ファイルサイズ {0} -> {1} ({2}%)\r\n圧縮品質 SNR: {3}dB (高いほど良い。20dB以下は圧縮を使わない方がいいかも。)", fromFileSize, tempFileSize,
Math.Round(tempFileSize * 100 / (double)fromFileSize, 2), Math.Round(snr, 3));
PreviewResult.Text = str;
}
else
{
playTempWave = this.TempFilename;
tempFileSize = U.GetFileSize(this.TempFilename);
string str = R._("ファイルサイズ {0} -> {1} ({2}%)", fromFileSize, tempFileSize,
Math.Round(tempFileSize * 100 / (double)fromFileSize, 2));
PreviewResult.Text = str;
}
this.WavePlayer = new System.Media.SoundPlayer(playTempWave);
this.WavePlayer.Play();
}