/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="path">ファイルのパス</param>
public RiffReader(string path)
{
waveFormat = new WaveFormatEx();
streamOffset = streamLength = 0;
chunks = new List <Chunk>();
if (!File.Exists(path))
{
throw new IOException("no file");
}
try {
streamFs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
streamBr = new BinaryReader(streamFs);
} catch (Exception) { // 乱暴だがこれで問題になる状況はよほどの状況
Close();
throw;
}
InitializeDisposeFinalizePattern();
}
/// <summary>
/// RIFF-WAVヘッダーを書き込みます。
/// </summary>
/// <param name="waveFormat">出力するWAVEFORMATヘッダー</param>
/// <returns>書き出しに成功すれば真</returns>
public bool WriteHeader(WaveFormatEx waveFormat)
{
ThrowExceptionIfDisposed();
try {
streamBw.Write(new byte[] { (byte)'R', (byte)'I', (byte)'F', (byte)'F' });
streamBw.Write((uint)0);
streamBw.Write(new byte[] { (byte)'W', (byte)'A', (byte)'V', (byte)'E', (byte)'f', (byte)'m', (byte)'t', (byte)' ' });
streamBw.Write((uint)0x10);
streamBw.Write((ushort)waveFormat.FormatTag);
streamBw.Write(waveFormat.Channels);
streamBw.Write((uint)waveFormat.SamplesPerSecond);
streamBw.Write((uint)waveFormat.AverageBytesPerSecond);
streamBw.Write((ushort)waveFormat.BlockAlign);
streamBw.Write((ushort)waveFormat.BitsPerSample);
streamBw.Write(new byte[] { (byte)'d', (byte)'a', (byte)'t', (byte)'a' });
streamBw.Write((uint)0);
} catch (IOException) {
return(false);
}
return(true);
}