public WavFile(WavFile Copy)
{
Header = new WavHeader(Copy.Header);
}
/// <summary>
/// Загружает данные из файла
/// </summary>
/// <param name="path"></param>
public void Load(Stream stream)
{
/******************************** Чтение заголовка *******************************/
Header = new WavHeader();
int hsize = Marshal.SizeOf(Header.GetType());
byte[] buffer = new byte[hsize];
stream.Read(buffer, 0, hsize);
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
Header = (WavHeader)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), Header.GetType());
handle.Free();
/******************************** Чтение данных *******************************/
if (Header.BitsPerSample > 32)
throw new FormatException("Format is not supported: too large bps");
if (Header.AudioFormat != 1)
throw new FormatException("Format is not supported: encoding format is not PCM");
NumSamples = (long)((stream.Length - hsize) * 8.0 / Header.BitsPerSample / Header.NumChannels);
BinaryReader br = new BinaryReader(stream);
Data = new int[Header.NumChannels][];
for (int i = 0; i < Header.NumChannels; i++) Data[i] = new int[NumSamples];
switch (Header.BitsPerSample)
{
case 8:
for (int i = 0; i < Header.NumChannels; i++)
{
for (int j = 0; j < NumSamples; j++) Data[i][j] = br.ReadByte();
}
break;
case 16:
for (int i = 0; i < Header.NumChannels; i++)
{
for (int j = 0; j < NumSamples; j++) Data[i][j] = br.ReadInt16();
}
break;
case 24:
throw new NotImplementedException("24 bytes per second not supported");
default:
for (int i = 0; i < Header.NumChannels; i++)
{
for (int j = 0; j < NumSamples; j++) Data[i][j] = br.ReadInt32();
}
break;
}
stream.Close();
return;
}
public WavHeader(WavHeader wavHeader)
{
ChunkId = wavHeader.ChunkId;
ChunkSize = wavHeader.ChunkSize;
Format = wavHeader.Format;
Subchunk1Id = wavHeader.Subchunk1Id;
Subchunk1Size = wavHeader.Subchunk1Size;
AudioFormat = wavHeader.AudioFormat;
NumChannels = wavHeader.NumChannels;
SampleRate = wavHeader.SampleRate;
ByteRate = wavHeader.ByteRate;
BlockAlign = wavHeader.BlockAlign;
BitsPerSample = wavHeader.BitsPerSample;
Subchunk2Id = wavHeader.Subchunk2Id;
Subchunk2Size = wavHeader.Subchunk2Size;
}
