From 5da93d17bd584fee525a46ba632c9616d34b96b4 Mon Sep 17 00:00:00 2001
From: wheremyfoodat <44909372+wheremyfoodat@users.noreply.github.com>
Date: Fri, 5 Apr 2024 19:42:18 +0300
Subject: [PATCH] HLE DSP: More of it

---
 include/audio/hle_core.hpp  | 24 +++++++++++++++++++++++-
 src/core/audio/hle_core.cpp | 27 +++++++++++++++++++++++++--
 2 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/include/audio/hle_core.hpp b/include/audio/hle_core.hpp
index 202b9308..f957284d 100644
--- a/include/audio/hle_core.hpp
+++ b/include/audio/hle_core.hpp
@@ -6,6 +6,27 @@
 #include "memory.hpp"
 
 namespace Audio {
+	struct DSPSource {
+		std::array<float, 3> gain0, gain1, gain2;
+
+		// Audio buffer information
+		// https://www.3dbrew.org/wiki/DSP_Memory_Region
+		struct Buffer {
+			u32 paddr;        // Physical address of the buffer
+			u32 sampleCount;  // Total number of samples
+			u8 adpcmScale;    // ADPCM predictor/scale
+			u8 pad;           // Unknown
+
+			std::array<s16, 2> previousSamples;  // ADPCM y[n-1] and y[n-2]
+			bool adpcmDirty;
+			bool looping;
+			u16 bufferID;
+		};
+
+		void reset();
+		DSPSource() { reset(); }
+	};
+
 	class HLE_DSP : public DSPCore {
 		// The audio frame types are public in case we want to use them for unit tests
 	  public:
@@ -24,6 +45,7 @@ namespace Audio {
 		template <typename T>
 		using QuadFrame = Frame<T, 4>;
 
+		using Source = Audio::DSPSource;
 	  private:
 		enum class DSPState : u32 {
 			Off,
@@ -61,7 +83,7 @@ namespace Audio {
 		Audio::HLE::SharedMemory& readRegion() { return readRegionIndex() == 0 ? dspRam.region0 : dspRam.region1; }
 		Audio::HLE::SharedMemory& writeRegion() { return readRegionIndex() == 0 ? dspRam.region1 : dspRam.region0; }
 
-		StereoFrame<s16> generateFrame();
+		void generateFrame(StereoFrame<s16>& frame);
 		void outputFrame();
 	  public:
 		HLE_DSP(Memory& mem, Scheduler& scheduler, DSPService& dspService) : DSPCore(mem, scheduler, dspService) {}
diff --git a/src/core/audio/hle_core.cpp b/src/core/audio/hle_core.cpp
index 32697534..65bcb2c6 100644
--- a/src/core/audio/hle_core.cpp
+++ b/src/core/audio/hle_core.cpp
@@ -1,5 +1,7 @@
 #include "audio/hle_core.hpp"
 
+#include <thread>
+
 #include "services/dsp.hpp"
 
 namespace Audio {
@@ -168,7 +170,28 @@ namespace Audio {
 	}
 
 	void HLE_DSP::outputFrame() {
-		StereoFrame<s16> frame = generateFrame();
-		Helpers::panic("HLE DSP: Output frame");
+		StereoFrame<s16> frame;
+		generateFrame(frame);
+
+		if (audioEnabled) {
+			// Wait until we've actually got room to push our frame
+			while (sampleBuffer.size() + 2 > sampleBuffer.Capacity()) {
+				std::this_thread::sleep_for(std::chrono::milliseconds{1});
+			}
+
+			sampleBuffer.push(frame.data(), frame.size());
+		}
 	}
+
+	void HLE_DSP::generateFrame(StereoFrame<s16>& frame) {
+		using namespace Audio::HLE;
+		SharedMemory& read = readRegion();
+		SharedMemory& write = writeRegion();
+
+		for (int source = 0; source < sourceCount; source++) {
+			Helpers::panic("Panda");
+		}
+	}
+
+	void DSPSource::reset() {}
 }  // namespace Audio