} // 'XPCM'
public override SoundInput TryOpen(IBinaryStream file)
{
file.Position = 4;
int src_size = file.ReadInt32();
if (src_size <= 0)
{
throw new InvalidFormatException();
}
int mode = file.ReadInt32();
int extra = (mode >> 8) & 0xff;
mode &= 0xff;
if (5 == mode)
{
uint ogg_size = file.ReadUInt32();
var ogg = new StreamRegion(file.AsStream, 0x10, ogg_size);
return(new OggInput(ogg));
}
var format = new WaveFormat();
format.FormatTag = file.ReadUInt16();
format.Channels = file.ReadUInt16();
format.SamplesPerSecond = file.ReadUInt32();
format.AverageBytesPerSecond = file.ReadUInt32();
format.BlockAlign = file.ReadUInt16();
format.BitsPerSample = file.ReadUInt16();
Stream pcm;
if (0 == mode)
{
pcm = new StreamRegion(file.AsStream, file.Position, src_size);
}
else if (1 == mode || 3 == mode)
{
var decoder = new PcmDecoder(file, src_size, extra, (XpcmCompression)mode);
pcm = new MemoryStream(decoder.Unpack(), 0, src_size);
file.Dispose();
}
else
{
throw new NotSupportedException("Not supported Circus PCM audio compression");
}
return(new RawPcmInput(pcm, format));
}
public PcmInput(Stream file) : base(null)
{
file.Position = 4;
using (var input = new ArcView.Reader(file))
{
int src_size = input.ReadInt32();
if (src_size <= 0)
{
throw new InvalidFormatException();
}
int mode = input.ReadInt32();
int extra = (mode >> 8) & 0xff;
mode &= 0xff;
var format = new WaveFormat();
format.FormatTag = input.ReadUInt16();
format.Channels = input.ReadUInt16();
format.SamplesPerSecond = input.ReadUInt32();
format.AverageBytesPerSecond = input.ReadUInt32();
format.BlockAlign = input.ReadUInt16();
format.BitsPerSample = input.ReadUInt16();
this.Format = format;
this.PcmSize = src_size;
if (0 == mode)
{
this.Source = new StreamRegion(file, file.Position, src_size);
}
else if (1 == mode || 3 == mode)
{
var decoder = new PcmDecoder(input, src_size, extra, (XpcmCompression)mode);
this.Source = new MemoryStream(decoder.Unpack(), 0, src_size);
file.Dispose();
}
else
{
throw new NotSupportedException("Not supported Circus PCM audio compression");
}
}
}