using Ryujinx.Audio.Renderer.Parameter; using Ryujinx.Common.Utilities; using System; using System.Diagnostics; using System.Runtime.InteropServices; namespace Ryujinx.Audio.Renderer.Server.Splitter { /// <summary> /// Server state for a splitter destination. /// </summary> [StructLayout(LayoutKind.Sequential, Size = 0xE0, Pack = Alignment)] public struct SplitterDestination { public const int Alignment = 0x10; /// <summary> /// The unique id of this <see cref="SplitterDestination"/>. /// </summary> public int Id; /// <summary> /// The mix to output the result of the splitter. /// </summary> public int DestinationId; /// <summary> /// Mix buffer volumes storage. /// </summary> private MixArray _mix; private MixArray _previousMix; /// <summary> /// Pointer to the next linked element. /// </summary> private unsafe SplitterDestination* _next; /// <summary> /// Set to true if in use. /// </summary> [MarshalAs(UnmanagedType.I1)] public bool IsUsed; /// <summary> /// Set to true if the internal state need to be updated. /// </summary> [MarshalAs(UnmanagedType.I1)] public bool NeedToUpdateInternalState; [StructLayout(LayoutKind.Sequential, Size = 4 * Constants.MixBufferCountMax, Pack = 1)] private struct MixArray { } /// <summary> /// Mix buffer volumes. /// </summary> /// <remarks>Used when a splitter id is specified in the mix.</remarks> public Span<float> MixBufferVolume => SpanHelpers.AsSpan<MixArray, float>(ref _mix); /// <summary> /// Previous mix buffer volumes. /// </summary> /// <remarks>Used when a splitter id is specified in the mix.</remarks> public Span<float> PreviousMixBufferVolume => SpanHelpers.AsSpan<MixArray, float>(ref _previousMix); /// <summary> /// Get the <see cref="Span{SplitterDestination}"/> of the next element or <see cref="Span{SplitterDestination}.Empty"/> if not present. /// </summary> public readonly Span<SplitterDestination> Next { get { unsafe { return _next != null ? new Span<SplitterDestination>(_next, 1) : Span<SplitterDestination>.Empty; } } } /// <summary> /// Create a new <see cref="SplitterDestination"/>. /// </summary> /// <param name="id">The unique id of this <see cref="SplitterDestination"/>.</param> public SplitterDestination(int id) : this() { Id = id; DestinationId = Constants.UnusedMixId; ClearVolumes(); } /// <summary> /// Update the <see cref="SplitterDestination"/> from user parameter. /// </summary> /// <param name="parameter">The user parameter.</param> public void Update(SplitterDestinationInParameter parameter) { Debug.Assert(Id == parameter.Id); if (parameter.IsMagicValid() && Id == parameter.Id) { DestinationId = parameter.DestinationId; parameter.MixBufferVolume.CopyTo(MixBufferVolume); if (!IsUsed && parameter.IsUsed) { MixBufferVolume.CopyTo(PreviousMixBufferVolume); NeedToUpdateInternalState = false; } IsUsed = parameter.IsUsed; } } /// <summary> /// Update the internal state of the instance. /// </summary> public void UpdateInternalState() { if (IsUsed && NeedToUpdateInternalState) { MixBufferVolume.CopyTo(PreviousMixBufferVolume); } NeedToUpdateInternalState = false; } /// <summary> /// Set the update internal state marker. /// </summary> public void MarkAsNeedToUpdateInternalState() { NeedToUpdateInternalState = true; } /// <summary> /// Return true if the <see cref="SplitterDestination"/> is used and has a destination. /// </summary> /// <returns>True if the <see cref="SplitterDestination"/> is used and has a destination.</returns> public readonly bool IsConfigured() { return IsUsed && DestinationId != Constants.UnusedMixId; } /// <summary> /// Get the volume for a given destination. /// </summary> /// <param name="destinationIndex">The destination index to use.</param> /// <returns>The volume for the given destination.</returns> public float GetMixVolume(int destinationIndex) { Debug.Assert(destinationIndex >= 0 && destinationIndex < Constants.MixBufferCountMax); return MixBufferVolume[destinationIndex]; } /// <summary> /// Clear the volumes. /// </summary> public void ClearVolumes() { MixBufferVolume.Clear(); PreviousMixBufferVolume.Clear(); } /// <summary> /// Link the next element to the given <see cref="SplitterDestination"/>. /// </summary> /// <param name="next">The given <see cref="SplitterDestination"/> to link.</param> public void Link(ref SplitterDestination next) { unsafe { fixed (SplitterDestination* nextPtr = &next) { _next = nextPtr; } } } /// <summary> /// Remove the link to the next element. /// </summary> public void Unlink() { unsafe { _next = null; } } } }