R/Ryujinx.Audio.Backends.SoundIo/Native/libsoundio/SoundIOChannelLayout.cs
Mary f556c80d02
Haydn: Part 1 (#2007)
* Haydn: Part 1

Based on my reverse of audio 11.0.0.

As always, core implementation under LGPLv3 for the same reasons as for Amadeus.

This place the bases of a more flexible audio system while making audout & audin accurate.

This have the following improvements:
- Complete reimplementation of audout and audin.
- Audin currently only have a dummy backend.
- Dramatically reduce CPU usage by up to 50% in common cases (SoundIO and OpenAL).
- Audio Renderer now can output to 5.1 devices when supported.
- Audio Renderer init its backend on demand instead of keeping two up all the time.
- All backends implementation are now in their own project.
- Ryujinx.Audio.Renderer was renamed Ryujinx.Audio and was refactored because of this.

As a note, games having issues with OpenAL haven't improved and will not
because of OpenAL design (stopping when buffers finish playing causing
possible audio "pops" when buffers are very small).

* Update for latest hexkyz's edits on Switchbrew

* audren: Rollback channel configuration changes

* Address gdkchan's comments

* Fix typo in OpenAL backend driver

* Address last comments

* Fix a nit

* Address gdkchan's comments
2021-02-26 01:11:56 +01:00

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3.3 KiB
C#

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
namespace SoundIOSharp
{
public struct SoundIOChannelLayout
{
public static int BuiltInCount
{
get { return Natives.soundio_channel_layout_builtin_count(); }
}
public static SoundIOChannelLayout GetBuiltIn(int index)
{
return new SoundIOChannelLayout(Natives.soundio_channel_layout_get_builtin(index));
}
public static SoundIOChannelLayout GetDefault(int channelCount)
{
var handle = Natives.soundio_channel_layout_get_default(channelCount);
return new SoundIOChannelLayout (handle);
}
public static SoundIOChannelId ParseChannelId(string name)
{
var ptr = Marshal.StringToHGlobalAnsi(name);
try
{
return (SoundIOChannelId)Natives.soundio_parse_channel_id(ptr, name.Length);
}
finally
{
Marshal.FreeHGlobal(ptr);
}
}
// instance members
internal SoundIOChannelLayout(Pointer<SoundIoChannelLayout> handle)
{
this.handle = handle;
}
readonly Pointer<SoundIoChannelLayout> handle;
public bool IsNull
{
get { return handle.Handle == IntPtr.Zero; }
}
internal IntPtr Handle
{
get { return handle; }
}
public int ChannelCount
{
get { return IsNull ? 0 : Marshal.ReadInt32((IntPtr)handle + channel_count_offset); }
}
static readonly int channel_count_offset = (int)Marshal.OffsetOf<SoundIoChannelLayout>("channel_count");
public string Name
{
get { return IsNull ? null : Marshal.PtrToStringAnsi(Marshal.ReadIntPtr((IntPtr)handle + name_offset)); }
}
static readonly int name_offset = (int)Marshal.OffsetOf<SoundIoChannelLayout>("name");
public IEnumerable<SoundIOChannelId> Channels
{
get
{
if (IsNull) yield break;
for (int i = 0; i < 24; i++)
{
yield return (SoundIOChannelId)Marshal.ReadInt32((IntPtr)handle + channels_offset + sizeof(SoundIoChannelId) * i);
}
}
}
static readonly int channels_offset = (int)Marshal.OffsetOf<SoundIoChannelLayout>("channels");
public override bool Equals(object other)
{
if (!(other is SoundIOChannelLayout)) return false;
var s = (SoundIOChannelLayout) other;
return handle == s.handle || Natives.soundio_channel_layout_equal(handle, s.handle);
}
public override int GetHashCode()
{
return handle.GetHashCode();
}
public string DetectBuiltInName()
{
if (IsNull) throw new InvalidOperationException();
return Natives.soundio_channel_layout_detect_builtin(handle) ? Name : null;
}
public int FindChannel(SoundIOChannelId channel)
{
if (IsNull) throw new InvalidOperationException();
return Natives.soundio_channel_layout_find_channel(handle, (SoundIoChannelId)channel);
}
}
}