[VideoOut] Add Bink2 support via FFMPEG bridge (#527)

* [VideoOut] Add Bink2 support via FFMPEG bridge * [CMake] update commit * [CMake] update commit
2026-07-26 20:50:53 +08:00 · 2026-07-22 21:41:41 +03:00
parent d3600c9255
commit f704586a8d
22 changed files with 3087 additions and 310 deletions
@@ -0,0 +1,79 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Buffers.Binary;
+using SharpEmu.Libs.Bink;
+using Xunit;
+
+namespace SharpEmu.Libs.Tests.Bink;
+
+public sealed class Bink2MovieBridgeTests : IDisposable
+{
+    private readonly string _tempDirectory = Path.Combine(
+        Path.GetTempPath(),
+        $"sharpemu-bink-{Guid.NewGuid():N}");
+
+    public Bink2MovieBridgeTests()
+    {
+        Directory.CreateDirectory(_tempDirectory);
+    }
+
+    [Fact]
+    public void HeaderPreservesFractionalFrameRate()
+    {
+        var path = WriteHeader("KB2j"u8, 3840, 2160, 30_000, 1_001);
+
+        Assert.True(Bink2MovieBridge.TryReadBinkInfo(path, out var info));
+        Assert.Equal(3840u, info.Width);
+        Assert.Equal(2160u, info.Height);
+        Assert.Equal(30_000u, info.FramesPerSecondNumerator);
+        Assert.Equal(1_001u, info.FramesPerSecondDenominator);
+    }
+
+    [Theory]
+    [InlineData("KB2g")]
+    [InlineData("KB2i")]
+    [InlineData("KB2j")]
+    public void HeaderAcceptsBink2Revisions(string signature)
+    {
+        var path = WriteHeader(
+            System.Text.Encoding.ASCII.GetBytes(signature),
+            1920,
+            1080,
+            60,
+            1);
+
+        Assert.True(Bink2MovieBridge.TryReadBinkInfo(path, out _));
+    }
+
+    [Fact]
+    public void HeaderRejectsMissingFrameRateDenominator()
+    {
+        var path = WriteHeader("KB2j"u8, 1920, 1080, 60, 0);
+
+        Assert.False(Bink2MovieBridge.TryReadBinkInfo(path, out _));
+    }
+
+    private string WriteHeader(
+        ReadOnlySpan<byte> signature,
+        uint width,
+        uint height,
+        uint fpsNumerator,
+        uint fpsDenominator)
+    {
+        var header = new byte[36];
+        signature.CopyTo(header);
+        BinaryPrimitives.WriteUInt32LittleEndian(header.AsSpan(0x14), width);
+        BinaryPrimitives.WriteUInt32LittleEndian(header.AsSpan(0x18), height);
+        BinaryPrimitives.WriteUInt32LittleEndian(header.AsSpan(0x1C), fpsNumerator);
+        BinaryPrimitives.WriteUInt32LittleEndian(header.AsSpan(0x20), fpsDenominator);
+        var path = Path.Combine(_tempDirectory, $"{Guid.NewGuid():N}.bk2");
+        File.WriteAllBytes(path, header);
+        return path;
+    }
+
+    public void Dispose()
+    {
+        Directory.Delete(_tempDirectory, recursive: true);
+    }
+}