/// <summary>
/// Creates a new audio buffer with given audio data.
/// </summary>
/// <param name="data"></param>
public AudioBuffer(AudioData data)
: this()
{
SetData(data);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public override AudioData ReadAudioData()
{
string chunkDescriptor = Encoding.ASCII.GetString(ReadBytes(4));
int chunkSize = BitConverter.ToInt32(ReadBytes(4), 0);
string format = Encoding.Default.GetString(ReadBytes(4));
string subchunk1id = Encoding.Default.GetString(ReadBytes(4));
int subchunk1Size = BitConverter.ToInt32(ReadBytes(4), 0);
short audioFormat = BitConverter.ToInt16(ReadBytes(2), 0);
short numChannels = BitConverter.ToInt16(ReadBytes(2), 0);
int sampleRate = BitConverter.ToInt32(ReadBytes(4), 0);
int byteRate = BitConverter.ToInt32(ReadBytes(4), 0);
short blockAlign = BitConverter.ToInt16(ReadBytes(2), 0);
short bitsPerSample = BitConverter.ToInt16(ReadBytes(2), 0);
string subchunk2id = Encoding.Default.GetString(ReadBytes(4));
int subchunk2Size = BitConverter.ToInt32(ReadBytes(4), 0);
byte[] data = ReadBytes(subchunk2Size);
if (chunkDescriptor != "RIFF")
{
throw new FormatException("WAVE File has not RIFF format!");
}
if (chunkSize != BaseStream.Length - 8)
{
throw new FormatException("WAVE File chunk size has not the expected size!");
}
if (format != "WAVE")
{
throw new FormatException("This is not a WAVE file!");
}
if (subchunk1id != "fmt ")
{
throw new FormatException("WAVE File: \"fmt \" subchunk not found where expected!");
}
if (subchunk1Size != 16)
{
throw new FormatException("WAVE File: \"fmt \" subchunk has not the size of 16 (PCM)!");
}
if (audioFormat != 1)
{
throw new FormatException("WAVE File: This is not a PCM file!");
}
if (numChannels > 2)
{
throw new NotSupportedException("WAVE File: More channels than 2 are currently not supported!");
}
if (byteRate != sampleRate * numChannels * (bitsPerSample / 8))
{
throw new FormatException("WAVE File: Byte Rate has not the expected value!");
}
if (blockAlign != numChannels * (bitsPerSample / 8))
{
throw new FormatException("WAVE File: Block Align has not the expected value!");
}
if (bitsPerSample != 8 && bitsPerSample != 16)
{
throw new NotSupportedException("WAVE File: Only 8 or 16 bits per sample supported!");
}
if (subchunk2id != "data")
{
throw new FormatException("WAVE File: \"data\" subchunk not found where expected!");
}
ALFormat fmt = ALFormat.Stereo16;
if (numChannels == 1 && bitsPerSample == 16)
{
fmt = ALFormat.Mono16;
}
else if (numChannels == 1 && bitsPerSample == 8)
{
fmt = ALFormat.Mono8;
}
else if (numChannels == 2 && bitsPerSample == 8)
{
fmt = ALFormat.Stereo8;
}
else if (numChannels == 2 && bitsPerSample == 16)
{
fmt = ALFormat.Stereo16;
}
AudioData ret = new AudioData(data, fmt, sampleRate);
return(ret);
}
