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
2026-07-31 15:09:42 +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 +1,35 @@
+// SPDX-License-Identifier: MIT
+#nullable disable
+namespace LibAtrac9
+{
+    internal static class Stereo
+    {
+        public static void ApplyIntensityStereo(Block block)
+        {
+            if (block.BlockType != BlockType.Stereo) return;
+
+            int totalUnits = block.QuantizationUnitCount;
+            int stereoUnits = block.StereoQuantizationUnit;
+            if (stereoUnits >= totalUnits) return;
+
+            Channel source = block.PrimaryChannel;
+            Channel dest = block.SecondaryChannel;
+
+            for (int i = stereoUnits; i < totalUnits; i++)
+            {
+                int sign = block.JointStereoSigns[i];
+                for (int sb = Tables.QuantUnitToCoeffIndex[i]; sb < Tables.QuantUnitToCoeffIndex[i + 1]; sb++)
+                {
+                    if (sign > 0)
+                    {
+                        dest.Spectra[sb] = -source.Spectra[sb];
+                    }
+                    else
+                    {
+                        dest.Spectra[sb] = source.Spectra[sb];
+                    }
+                }
+            }
+        }
+    }
+}