Beispiel #1
0
 public byte[] LoadWAVE(DataStream stream, out int channels, out int bits, out int rate)
 {
     DataReader dr = new DataReader(stream);
     string signature = new string(dr.ReadChars(4));
     if (signature != "RIFF")
     {
         throw new NotSupportedException("Not a RIFF .wav file: " + signature);
     }
     /*int riff_chunk_size = */dr.ReadInt32();
     string format = new string(dr.ReadChars(4));
     if (format != "WAVE")
     {
         throw new NotSupportedException("Not a WAVE .wav file: " + format);
     }
     string format_signature = new string(dr.ReadChars(4));
     if (format_signature != "fmt ")
     {
         throw new NotSupportedException("Not a 'fmt ' .wav file: " + format_signature);
     }
     /*int format_chunk_size = */dr.ReadInt32();
     /*int audio_format = */dr.ReadInt16();
     int num_channels = dr.ReadInt16();
     if (num_channels != 1 && num_channels != 2)
     {
         throw new NotSupportedException("Invalid number of channels: " + num_channels);
     }
     int sample_rate = dr.ReadInt32();
     /*int byte_rate = */dr.ReadInt32();
     /*int block_align = */dr.ReadInt16();
     int bits_per_sample = dr.ReadInt16();
     string data_signature = new string(dr.ReadChars(4));
     if (data_signature != "data")
     {
         throw new NotSupportedException("Not a DATA .wav file: " + data_signature);
     }
     /*int data_chunk_size = */dr.ReadInt32();
     channels = num_channels;
     bits = bits_per_sample;
     rate = sample_rate;
     return dr.ReadBytes((int)dr.BaseStream.Length);
 }