/// <summary>
/// Renders the VGMSTREAM to byte buffer.
/// </summary>
/// <param name="buffer">Destination byte buffer.</param>
/// <param name="offset">Offset within buffer to write to.</param>
/// <param name="count">Count of bytes to render.</param>
/// <returns>Number of bytes read.</returns>
public override int Read(byte[] buffer, int offset, int count)
{
if (cache == null || cache.Length < buffer.Length)
{
cache = new byte[buffer.Length];
}
int currentSample = VGMStreamNative.GetCurrentSample(vgmstream);
int sampleCount_vgmstream = count / waveFormat.Channels / 2;
if (currentSample >= sampleCount && !loopFlag)
{
return(0);
}
if (!loopFlag && currentSample + sampleCount_vgmstream > sampleCount)
{
sampleCount_vgmstream = sampleCount - currentSample;
}
count = sampleCount_vgmstream * waveFormat.Channels * 2;
VGMStreamNative.Render8(cache, sampleCount_vgmstream, vgmstream);
Array.Copy(cache, 0, buffer, offset, count);
return(count);
}
/// <summary>
/// Forces the VGMSTREAM to loop from start to end.
/// This method destroys the previous loop points.
/// </summary>
public void ForceLoop()
{
VGMStreamNative.SetLoopFlag(vgmstream, true);
VGMStreamNative.SetLoopStartSample(vgmstream, 0);
VGMStreamNative.SetLoopEndSample(vgmstream, sampleCount);
loopFlag = true;
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
VGMStreamNative.Close(vgmstream);
}
base.Dispose(disposing);
}
private void FromPtr(IntPtr vgmstream)
{
if (vgmstream == IntPtr.Zero)
{
throw new NullReferenceException("VGMSTREAM pointer is set to null!");
}
waveFormat = new WaveFormat(VGMStreamNative.GetSampleRate(vgmstream), 16, VGMStreamNative.GetChannelCount(vgmstream));
sampleCount = VGMStreamNative.GetSampleCount(vgmstream);
loopFlag = VGMStreamNative.GetLoopFlag(vgmstream);
cache = new byte[4096];
}
/// <summary>
/// Constructs from source file name.
/// </summary>
/// <param name="sourceFileName">Source file name to load.</param>
public VGMStreamReader(string sourceFileName)
{
if (!File.Exists(sourceFileName))
{
throw new FileNotFoundException($"VGMStream could not find file: {sourceFileName}");
}
vgmstream = VGMStreamNative.Initialize(sourceFileName);
if (vgmstream == IntPtr.Zero)
{
throw new NullReferenceException($"VGMStream could not initialize file: {sourceFileName}");
}
FromPtr(vgmstream);
}
/// <summary>
/// Resets the VGMSTREAM to beginning.
/// </summary>
public void Reset()
{
VGMStreamNative.Reset(vgmstream);
}
/// <summary>
/// Disables the loop for this VGMSTREAM.
/// </summary>
public void DisableLoop()
{
loopFlag = false;
VGMStreamNative.SetLoopFlag(vgmstream, false);
}