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Sdl backend (#670)

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* [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
This commit is contained in:
Berk
2026-07-28 03:33:26 +03:00
committed by GitHub
parent b4cc5f88ca
commit 2b6bd5a532
111 changed files with 9846 additions and 4479 deletions
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src/SharpEmu.Libs/Ngs2/Ngs2Exports.cs
+45 -10
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@@ -30,7 +30,7 @@ public static class Ngs2Exports
// The grain length defaults to 256 frames (matching the 8192-byte AudioOut
// buffers games copy it into) until the title overrides it.
private const int DefaultGrainSamples = 256;
private const double OutputSampleRate = 48000.0;
private const int DefaultSampleRate = 48000;
private sealed class SystemState
{
@@ -38,6 +38,7 @@ public static class Ngs2Exports
public uint Uid { get; }
public int GrainSamples { get; set; } = DefaultGrainSamples;
public int SampleRate { get; set; } = DefaultSampleRate;
}
private sealed record RackState(ulong SystemHandle, uint RackId);
@@ -496,6 +497,7 @@ public static class Ngs2Exports
return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
}
Span<byte> renderBufferInfo = stackalloc byte[RenderBufferInfoSize];
for (uint i = 0; i < bufferInfoCount; i++)
{
var entryAddress = bufferInfoAddress + (i * RenderBufferInfoSize);
@@ -527,10 +529,9 @@ public static class Ngs2Exports
if (ShouldTrace() && Interlocked.Increment(ref _renderInfoDumps) <= 4)
{
Span<byte> rbi = stackalloc byte[RenderBufferInfoSize];
ctx.Memory.TryRead(entryAddress, rbi);
ctx.Memory.TryRead(entryAddress, renderBufferInfo);
Console.Error.WriteLine(
$"[LOADER][TRACE] ngs2.renderbufinfo addr=0x{bufferAddress:X} size={bufferSize} ch={channels} raw={Convert.ToHexString(rbi)}");
$"[LOADER][TRACE] ngs2.renderbufinfo addr=0x{bufferAddress:X} size={bufferSize} ch={channels} raw={Convert.ToHexString(renderBufferInfo)}");
}
}
}
@@ -552,6 +553,7 @@ public static class Ngs2Exports
CpuContext ctx, ulong systemHandle, ulong bufferAddress, ulong bufferSize, int channels)
{
int grain;
int sampleRate;
lock (StateGate)
{
if (!Systems.TryGetValue(systemHandle, out var system))
@@ -560,6 +562,7 @@ public static class Ngs2Exports
}
grain = system.GrainSamples;
sampleRate = system.SampleRate;
}
var capacityFrames = (int)Math.Min((ulong)grain, bufferSize / (ulong)(channels * sizeof(float)));
@@ -590,7 +593,7 @@ public static class Ngs2Exports
continue;
}
MixOneVoice(accum, capacityFrames, channels, voice);
MixOneVoice(accum, capacityFrames, channels, sampleRate, voice);
mixedAnything = true;
}
}
@@ -606,15 +609,20 @@ public static class Ngs2Exports
}
}
// Resample one voice from its source rate to 48 kHz (nearest-sample) and add
// Resample one voice to the system rate and add
// it to the front stereo pair. Advances the voice cursor and handles loop /
// one-shot end. Must be called under StateGate.
private static void MixOneVoice(float[] accum, int frames, int channels, VoiceState voice)
private static void MixOneVoice(
float[] accum,
int frames,
int channels,
int outputSampleRate,
VoiceState voice)
{
var pcm = voice.Pcm!;
var loopEnd = voice.LoopEnd > 0 && voice.LoopEnd <= pcm.Length ? voice.LoopEnd : pcm.Length;
var loopStart = voice.LoopStart;
var step = voice.SourceRate / OutputSampleRate;
var step = voice.SourceRate / (double)outputSampleRate;
var gain = voice.Gain / 32768f;
var pos = voice.Position;
for (var f = 0; f < frames; f++)
@@ -640,7 +648,14 @@ public static class Ngs2Exports
break;
}
var sample = pcm[idx] * gain;
var next = idx + 1;
if (next >= loopEnd)
{
next = loopStart >= 0 && loopStart < loopEnd ? loopStart : idx;
}
var fraction = pos - idx;
var sample = (float)((pcm[idx] + ((pcm[next] - pcm[idx]) * fraction)) * gain);
var baseIndex = f * channels;
accum[baseIndex] += sample;
if (channels > 1)
@@ -736,7 +751,27 @@ public static class Ngs2Exports
ExportName = "sceNgs2SystemSetSampleRate",
Target = Generation.Gen4 | Generation.Gen5,
LibraryName = "libSceNgs2")]
public static int Ngs2SystemSetSampleRate(CpuContext ctx) => ValidateSystem(ctx);
public static int Ngs2SystemSetSampleRate(CpuContext ctx)
{
var systemHandle = ctx[CpuRegister.Rdi];
var sampleRate = unchecked((int)ctx[CpuRegister.Rsi]);
lock (StateGate)
{
if (!Systems.TryGetValue(systemHandle, out var system))
{
return SetReturn(ctx, OrbisNgs2ErrorInvalidSystemHandle);
}
if (sampleRate is < 8000 or > 192000)
{
return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
}
system.SampleRate = sampleRate;
}
return SetReturn(ctx, 0);
}
[SysAbiExport(
Nid = "gThZqM5PYlQ",