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Fix MPEG movie startup cadence

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gamer147
2026-07-28 12:16:16 -04:00
parent b2f1b4a45e
commit fdc7bb2bbc
10 changed files with 269 additions and 34 deletions
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111
engine/Age.Engine.Tests/MovieOpcodeTests.cs
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@@ -46,11 +46,13 @@ public class MovieOpcodeTests
private int _decodeCalls;
public FfmpegMovieInfo Info { get; } = info;
public int FailOnDecodeCall { get; init; } = -1;
public int DecodeCalls => Volatile.Read(ref _decodeCalls);
public bool Disposed { get; private set; }
public bool TryDecodeNextVideoFrame(out FfmpegVideoFrame frame)
{
if (_decodeCalls++ == FailOnDecodeCall)
int call = Interlocked.Increment(ref _decodeCalls) - 1;
if (call == FailOnDecodeCall)
throw new InvalidDataException("synthetic decode failure");
return _frames.TryDequeue(out frame!);
}
@@ -176,6 +178,65 @@ public class MovieOpcodeTests
Assert.Null(decoder.Failure);
}
[Fact]
public void FfmpegDecoderPublishesAndRetainsFirstDecodedFrameBeforePacing()
{
var source = new FakeFfmpegFrameSource(
new FfmpegMovieInfo(1, 1, 700, 30, 1, true, 1000, 2, 50),
SyntheticMovieFrame(1, 600), SyntheticMovieFrame(2, 634));
using var clock = new ManualMoviePacingClock();
clock.AdvanceTo(1000);
using var decoder = new FfmpegMovieDecoder(source, clock);
Assert.True(SpinWait.SpinUntil(() => source.DecodeCalls == 1, 1000));
Thread.Sleep(20);
Assert.Equal(1, source.DecodeCalls);
Assert.Equal(600, decoder.FirstFramePresentationTimeMs);
Assert.True(decoder.TryTakeFrame(out var first));
Assert.Equal((byte)1, first.Pixels[0]);
Assert.True(SpinWait.SpinUntil(() => source.DecodeCalls >= 2, 1000));
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
}
[Fact]
public void FfmpegAudioBearingDecoderRebasesVideoPacingToFirstSourceTimestamp()
{
var source = new FakeFfmpegFrameSource(
new FfmpegMovieInfo(1, 1, 700, 30, 1, true, 1000, 2, 50),
SyntheticMovieFrame(1, 600), SyntheticMovieFrame(2, 634));
using var clock = new ManualMoviePacingClock();
using var decoder = new FfmpegMovieDecoder(source, clock);
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
Assert.True(clock.WaitForDeadline(34));
clock.AdvanceTo(33);
Assert.False(decoder.TryTakeFrame(out _));
clock.AdvanceTo(34);
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
}
[Fact]
public void FfmpegVideoOnlyDecoderRebasesPacingToFirstSourceTimestamp()
{
var source = new FakeFfmpegFrameSource(
new FfmpegMovieInfo(1, 1, 700, 30, 1, false),
SyntheticMovieFrame(1, 600), SyntheticMovieFrame(2, 634));
using var clock = new ManualMoviePacingClock();
using var decoder = new FfmpegMovieDecoder(source, clock);
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
Assert.True(clock.WaitForDeadline(34));
clock.AdvanceTo(33);
Assert.False(decoder.TryTakeFrame(out _));
clock.AdvanceTo(34);
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
Assert.True(clock.WaitForDeadline(100));
clock.AdvanceTo(100);
Assert.True(SpinWait.SpinUntil(() => decoder.IsCompleted, 1000));
}
[Fact]
public void FfmpegDecoderDisposalInterruptsFutureFrameWait()
{
@@ -184,6 +245,7 @@ public class MovieOpcodeTests
SyntheticMovieFrame(1, 0), SyntheticMovieFrame(2, 60000));
using var clock = new ManualMoviePacingClock();
var decoder = new FfmpegMovieDecoder(source, clock);
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
Assert.True(clock.WaitForDeadline(60000));
var elapsed = Stopwatch.StartNew();
@@ -204,6 +266,7 @@ public class MovieOpcodeTests
using var clock = new ManualMoviePacingClock();
using var decoder = new FfmpegMovieDecoder(source, clock);
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
Assert.True(SpinWait.SpinUntil(() => decoder.IsCompleted, 1000));
Assert.Equal("synthetic decode failure", decoder.Failure);
}
@@ -229,6 +292,7 @@ public class MovieOpcodeTests
Assert.Equal(new long[] { 0, 50 }, chunks.Select(chunk => chunk.PresentationTimeMs));
Assert.Equal(100, chunks.Sum(chunk => chunk.FrameCount));
Assert.True(SpinWait.SpinUntil(() => decoder.TryTakeFrame(out _), 1000));
decoder.MarkAudioSubmitted();
clock.AdvanceTo(99);
Assert.False(decoder.IsCompleted);
@@ -323,6 +387,7 @@ public class MovieOpcodeTests
var table = OpcodeTableJson.Load(Paths.OpcodesJson);
var script = ScriptAssembler.Assemble(table, "MODAL", new List<(int, Operand[])>
{
(0x1f8, new[] { new Operand(0, 42), new Operand(0, 800), new Operand(0, 600), new Operand(0, 0) }),
(0x20f, new[] { new Operand(0, 0x335f), new Operand(0, 42), new Operand(0, 4) }),
(0x55, new[] { new Operand(3, 0x1234), new Operand(0, 0x5678) }),
(0x2, System.Array.Empty<Operand>()),
@@ -335,7 +400,9 @@ public class MovieOpcodeTests
Assert.Equal(new[] { (0x335fL, 42, 4L) }, host.ModalMovies);
Assert.Equal(0x5678, vm.Globals[0x1234]);
vm.Gfx.BindDraw(1, 42, 0, 0, 1, 1, 0, 0);
Assert.Equal(0x335f, vm.Gfx.SnapshotVisibleObjects().Single().SurfaceResId);
var visible = vm.Gfx.SnapshotVisibleObjects().Single();
Assert.Equal(0, visible.SurfaceResId);
Assert.Equal(-1, visible.ColorKey);
}
[Fact]
@@ -382,7 +449,9 @@ public class MovieOpcodeTests
Assert.Equal(0x5678, vm.Globals[0x1234]);
Assert.Equal(new[] { (0x33L, 5, 2L, 0L) }, host.Movies);
vm.Gfx.BindDraw(1, 5, 0, 0, 1, 1, 0, 0);
Assert.Equal(0x33, vm.Gfx.SnapshotVisibleObjects().Single().SurfaceResId);
var visible = vm.Gfx.SnapshotVisibleObjects().Single();
Assert.Equal(0, visible.SurfaceResId);
Assert.Equal(-1, visible.ColorKey);
}
[Fact]
@@ -409,7 +478,9 @@ public class MovieOpcodeTests
vm.Run();
Assert.Equal(0, resourceDuringSetup);
Assert.Equal(0x33, vm.Gfx.SnapshotVisibleObjects().Single().SurfaceResId);
var visible = vm.Gfx.SnapshotVisibleObjects().Single();
Assert.Equal(0, visible.SurfaceResId);
Assert.Equal(-1, visible.ColorKey);
}
[Fact]
@@ -505,6 +576,38 @@ public class MovieOpcodeTests
Assert.Equal(new byte[] { 0, 0, 1, 0xba }, movie.Bytes[..4]);
}
[Theory]
[InlineData(0x335f, "LOGO.AGF")]
[InlineData(0x3364, "OP.AGF")]
public void ModalMovieOpeningFramesAreOpaqueAndHaveContinuousCadence(
int resourceId, string expectedName)
{
if (!OperatingSystem.IsWindows()) return;
ConfigureFfmpegNativeProbe();
var catalog = Sys4AssetCatalog.Load(Paths.Sys4Ini);
var resources = new ResourceMap(catalog, new Sys4AssetStore(catalog, Paths.GameDir));
var payload = resources.ReadMovie(resources.ResolveMovie(resourceId)!);
using var movie = new FfmpegMovieSession(payload);
Assert.Equal(expectedName, payload.Name);
long priorTimestamp = -1;
byte[]? firstPixels = null;
bool openingChanged = false;
for (int frameIndex = 0; frameIndex < 20; frameIndex++)
{
Assert.True(movie.TryDecodeNextVideoFrame(out var frame),
$"{expectedName} ended before opening frame {frameIndex}");
if (priorTimestamp >= 0)
Assert.InRange(frame.PresentationTimeMs - priorTimestamp, 33, 34);
priorTimestamp = frame.PresentationTimeMs;
firstPixels ??= frame.Image.Pixels;
openingChanged |= !firstPixels.AsSpan().SequenceEqual(frame.Image.Pixels);
for (int alpha = 3; alpha < frame.Image.Pixels.Length; alpha += 4)
Assert.Equal((byte)255, frame.Image.Pixels[alpha]);
}
Assert.True(openingChanged, $"{expectedName} should change within its first 20 decoded frames");
}
[Theory]
[InlineData(0x2be3, "MVB961.AGF", 280, 352, 500)]
[InlineData(0x2b94, "MVB238.AGF", 280, 352, 866)]