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Implement forced BGM opcodes

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gamer147
2026-07-29 12:38:54 -04:00
parent 137fae848f
commit 2908d38663
14 changed files with 259 additions and 45 deletions
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35
engine/Age.Engine.Tests/SfxOpsTests.cs
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@@ -30,6 +30,41 @@ public class SfxOpsTests
Assert.Equal("exit", vm.HaltReason);
Assert.Equal([24L, 25L, 25L], host.BgmTracks);
Assert.Equal((0, 0L), Assert.Single(host.BgmFades));
Assert.Equal(1, host.BgmStops);
}
[Fact]
public void ForcedBgmTrioRestartsWithNativeModesReusesCurrentAndStops()
{
var table = OpcodeTableJson.Load(Paths.OpcodesJson);
const int currentAfterStop = 0x100;
const int currentAfterRestart = 0x101;
var script = ScriptAssembler.Assemble(table, "BGM-FORCE",
new List<(int, Operand[])>
{
(0xbf, new[] { new Operand(0, 24) }),
(0xb7, new[] { new Operand(0, 24) }), // same track still restarts
(0xb7, new[] { new Operand(0, 0) }), // zero aliases retained track
(0xb9, new[] { new Operand(0, 0) }), // retained track, one-shot mode
(0xb9, new[] { new Operand(0, 25) }), // nonzero replaces retained track
(0xb8, Array.Empty<Operand>()),
(0xc0, new[] { new Operand(3, currentAfterStop) }),
(0xb7, new[] { new Operand(0, 0) }), // no retained track: idempotent stop
(0xbf, new[] { new Operand(0, 25) }),
(0xc0, new[] { new Operand(3, currentAfterRestart) }),
(0x2, Array.Empty<Operand>()),
}, Array.Empty<string>());
var host = new RecordingHost();
var vm = new VirtualMachine(script, table, host);
vm.Run();
Assert.Equal("exit", vm.HaltReason);
Assert.Equal([24L, 25L], host.BgmTracks);
Assert.Equal([(24L, 1), (24L, 1), (24L, 0), (25L, 0)], host.BgmRestartRequests);
Assert.Equal(2, host.BgmStops);
Assert.Equal(0, vm.Globals[currentAfterStop]);
Assert.Equal(25, vm.Globals[currentAfterRestart]);
}
[Fact]