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* audio: Rewrite SoundIo bindings This rewrite SoundIo bindings to be safer and not a pedantic autogenerated mess. * Address comments * Switch DllImport to LibraryImport * Address gdkchan's comment
165 lines
4.7 KiB
C#
165 lines
4.7 KiB
C#
using System;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using static Ryujinx.Audio.Backends.SoundIo.Native.SoundIo;
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namespace Ryujinx.Audio.Backends.SoundIo.Native
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{
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public class SoundIoOutStreamContext : IDisposable
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{
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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private unsafe delegate void WriteCallbackDelegate(IntPtr ctx, int frameCountMin, int frameCountMax);
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private IntPtr _context;
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private IntPtr _nameStored;
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private Action<int, int> _writeCallback;
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private WriteCallbackDelegate _writeCallbackNative;
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public IntPtr Context => _context;
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internal SoundIoOutStreamContext(IntPtr context)
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{
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_context = context;
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_nameStored = IntPtr.Zero;
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_writeCallback = null;
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_writeCallbackNative = null;
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}
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private ref SoundIoOutStream GetOutContext()
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{
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unsafe
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{
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return ref Unsafe.AsRef<SoundIoOutStream>((SoundIoOutStream*)_context);
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}
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}
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public string Name
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{
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get => Marshal.PtrToStringAnsi(GetOutContext().Name);
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set
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{
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var context = GetOutContext();
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if (_nameStored != IntPtr.Zero && context.Name == _nameStored)
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{
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Marshal.FreeHGlobal(_nameStored);
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}
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_nameStored = Marshal.StringToHGlobalAnsi(value);
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GetOutContext().Name = _nameStored;
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}
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}
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public SoundIoChannelLayout Layout
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{
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get => GetOutContext().Layout;
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set => GetOutContext().Layout = value;
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}
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public SoundIoFormat Format
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{
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get => GetOutContext().Format;
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set => GetOutContext().Format = value;
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}
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public int SampleRate
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{
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get => GetOutContext().SampleRate;
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set => GetOutContext().SampleRate = value;
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}
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public float Volume
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{
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get => GetOutContext().Volume;
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set => GetOutContext().Volume = value;
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}
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public int BytesPerFrame
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{
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get => GetOutContext().BytesPerFrame;
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set => GetOutContext().BytesPerFrame = value;
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}
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public int BytesPerSample
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{
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get => GetOutContext().BytesPerSample;
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set => GetOutContext().BytesPerSample = value;
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}
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public Action<int, int> WriteCallback
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{
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get { return _writeCallback; }
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set
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{
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_writeCallback = value;
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if (_writeCallback == null)
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{
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_writeCallbackNative = null;
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}
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else
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{
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_writeCallbackNative = (ctx, frameCountMin, frameCountMax) => _writeCallback(frameCountMin, frameCountMax);
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}
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GetOutContext().WriteCallback = Marshal.GetFunctionPointerForDelegate(_writeCallbackNative);
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}
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}
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private static void CheckError(SoundIoError error)
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{
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if (error != SoundIoError.None)
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{
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throw new SoundIoException(error);
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}
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}
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public void Open() => CheckError(soundio_outstream_open(_context));
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public void Start() => CheckError(soundio_outstream_start(_context));
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public void Pause(bool pause) => CheckError(soundio_outstream_pause(_context, pause));
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public void SetVolume(double volume) => CheckError(soundio_outstream_set_volume(_context, volume));
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public Span<SoundIoChannelArea> BeginWrite(ref int frameCount)
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{
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IntPtr arenas = default;
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int nativeFrameCount = frameCount;
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unsafe
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{
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var frameCountPtr = &nativeFrameCount;
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var arenasPtr = &arenas;
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CheckError(soundio_outstream_begin_write(_context, (IntPtr)arenasPtr, (IntPtr)frameCountPtr));
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frameCount = *frameCountPtr;
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return new Span<SoundIoChannelArea>((void*)arenas, Layout.ChannelCount);
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}
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}
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public void EndWrite() => CheckError(soundio_outstream_end_write(_context));
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protected virtual void Dispose(bool disposing)
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{
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if (_context != IntPtr.Zero)
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{
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soundio_outstream_destroy(_context);
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_context = IntPtr.Zero;
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}
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}
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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~SoundIoOutStreamContext()
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{
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Dispose(false);
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}
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}
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}
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