Sdl backend (#670)

* [audio] added sdl audio backend and in-tree atrac9 decoder * [input] replaced per-platform pad readers with sdl gamepad input * [video] added sdl window and host display plumbing * [gui] added host display options and per-game render settings * [bink] synced host movie playback to the guest audio clock * [cpu] hooked windows write faults into guest image tracking * [perf] added guest and render profiling, reserved host cpu lanes * [kernel] fixed stale pthread mutex handle alias * [host] wired the sdl session, save-data paths and project references * [audio] hoisted ajm trace stackalloc out of its loop * [video] Add guest image sync setting * [build] Strip native symbols * reuse
2026-08-09 03:05:39 +08:00 · 2026-07-28 03:33:26 +03:00
parent b4cc5f88ca
commit 2b6bd5a532
111 changed files with 9846 additions and 4479 deletions
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: MIT
+#nullable disable
+using LibAtrac9.Utilities;
+
+namespace LibAtrac9
+{
+    internal class Channel
+    {
+        public Atrac9Config Config { get; }
+        public int ChannelIndex { get; }
+        public bool IsPrimary => Block.PrimaryChannelIndex == ChannelIndex;
+        public Block Block { get; }
+        public Mdct Mdct { get; }
+
+        public double[] Pcm { get; } = new double[256];
+        public double[] Spectra { get; } = new double[256];
+
+        public int CodedQuantUnits { get; set; }
+        public int ScaleFactorCodingMode { get; set; }
+        public int[] ScaleFactors { get; } = new int[31];
+        public int[] ScaleFactorsPrev { get; } = new int[31];
+
+        public int[] Precisions { get; } = new int[30];
+        public int[] PrecisionsFine { get; } = new int[30];
+        public int[] PrecisionMask { get; } = new int[30];
+
+        public int[] SpectraValuesBuffer { get; } = new int[16];
+        public int[] CodebookSet { get; } = new int[30];
+
+        public int[] QuantizedSpectra { get; } = new int[256];
+        public int[] QuantizedSpectraFine { get; } = new int[256];
+
+        public int BexMode { get; set; }
+        public int BexValueCount { get; set; }
+        public int[] BexValues { get; } = new int[4];
+        public double[] BexScales { get; } = new double[6];
+        public Atrac9Rng Rng { get; set; }
+
+        public Channel(Block parentBlock, int channelIndex)
+        {
+            Block = parentBlock;
+            ChannelIndex = channelIndex;
+            Config = parentBlock.Config;
+            Mdct = new Mdct(Config.FrameSamplesPower, Tables.ImdctWindow[Config.FrameSamplesPower - 6]);
+        }
+
+        public void UpdateCodedUnits() =>
+            CodedQuantUnits = IsPrimary ? Block.QuantizationUnitCount : Block.StereoQuantizationUnit;
+    }
+}