/// <summary> /// WriteHeader /// </summary> /// <param name="fileName"></param> /// <param name="header"></param> /// <param name="dataSize"></param> private static void WriteHeader(string fileName, WaveFileHeader header) { //Datei öffnen var fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite); var wr = new BinaryWriter(fs, Encoding.UTF8); //Chunk 1 wr.Write(header.RIFF); wr.Write(Int32ToBytes((int)header.RiffSize)); wr.Write(header.RiffFormat); //Chunk 2 wr.Write(header.FMT); wr.Write(Int32ToBytes((int)header.FMTSize)); wr.Write(Int16ToBytes(header.AudioFormat)); wr.Write(Int16ToBytes(header.Channels)); wr.Write(Int32ToBytes((int)header.SamplesPerSecond)); wr.Write(Int32ToBytes((int)header.BytesPerSecond)); wr.Write(Int16ToBytes(header.BlockAlign)); wr.Write(Int16ToBytes(header.BitsPerSample)); //Chunk 3 wr.Write(header.DATA); wr.Write(Int32ToBytes((int)header.DATASize)); //Datei schliessen wr.Close(); fs.Close(); }
/// <summary> /// ReadHeader /// </summary> /// <param name="fileName"></param> /// <returns></returns> private static WaveFileHeader ReadHeader(string fileName) { //Ergebnis var header = new WaveFileHeader(); //Wenn die Datei existiert if (File.Exists(fileName)) { //Datei öffnen var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); var rd = new BinaryReader(fs, Encoding.UTF8); //Lesen if (fs.CanRead) { //Chunk 1 header.RIFF = rd.ReadChars(4); header.RiffSize = (uint)rd.ReadInt32(); header.RiffFormat = rd.ReadChars(4); //Chunk 2 header.FMT = rd.ReadChars(4); header.FMTSize = (uint)rd.ReadInt32(); header.FMTPos = fs.Position; header.AudioFormat = rd.ReadInt16(); header.Channels = rd.ReadInt16(); header.SamplesPerSecond = (uint)rd.ReadInt32(); header.BytesPerSecond = (uint)rd.ReadInt32(); header.BlockAlign = rd.ReadInt16(); header.BitsPerSample = rd.ReadInt16(); //Zu Beginn von Chunk3 gehen fs.Seek(header.FMTPos + header.FMTSize, SeekOrigin.Begin); //Chunk 3 header.DATA = rd.ReadChars(4); header.DATASize = (uint)rd.ReadInt32(); header.DATAPos = (int)fs.Position; //Wenn nicht DATA if (new String(header.DATA).ToUpper() != "DATA") { var DataChunkSize = header.DATASize + 8; fs.Seek(DataChunkSize, SeekOrigin.Current); header.DATASize = (uint)(fs.Length - header.DATAPos - DataChunkSize); } //Payload einlesen header.Payload = rd.ReadBytes((int)header.DATASize); } //Schliessen rd.Close(); fs.Close(); } //Fertig return(header); }
/// <summary> /// CreateWaveFileHeader /// </summary> /// <param name="SamplesPerSecond"></param> /// <param name="BitsPerSample"></param> /// <param name="Channels"></param> /// <param name="dataSize"></param> /// <returns></returns> private static WaveFileHeader CreateNewWaveFileHeader(uint SamplesPerSecond, short BitsPerSample, short Channels, uint dataSize, long fileSize) { //Header erstellen var Header = new WaveFileHeader(); //Werte setzen Array.Copy("RIFF".ToArray(), Header.RIFF, 4); Header.RiffSize = (uint)(fileSize - 8); Array.Copy("WAVE".ToArray(), Header.RiffFormat, 4); Array.Copy("fmt ".ToArray(), Header.FMT, 4); Header.FMTSize = 16; Header.AudioFormat = WAVE_FORMAT_PCM; Header.Channels = Channels; Header.SamplesPerSecond = SamplesPerSecond; Header.BitsPerSample = BitsPerSample; Header.BlockAlign = (short)((BitsPerSample * Channels) >> 3); Header.BytesPerSecond = (uint)(Header.BlockAlign * Header.SamplesPerSecond); Array.Copy("data".ToArray(), Header.DATA, 4); Header.DATASize = dataSize; //Fertig return(Header); }