HLE DSP: Implement AAC audio decoder

include/audio/aac_decoder.hpp

@@ -0,0 +1,24 @@
+#pragma once
+#include <functional>
+
+#include "audio/aac.hpp"
+#include "helpers.hpp"
+
+struct AAC_DECODER_INSTANCE;
+
+namespace Audio::AAC {
+	class Decoder {
+		using DecoderHandle = AAC_DECODER_INSTANCE*;
+		using PaddrCallback = std::function<u8*(u32)>;
+
+		DecoderHandle decoderHandle = nullptr;
+
+		bool isInitialized() { return decoderHandle != nullptr; }
+		void initialize();
+
+	  public:
+		// Decode function. Takes in a reference to the AAC response & request, and a callback for paddr -> pointer conversions
+		void decode(AAC::Message& response, const AAC::Message& request, PaddrCallback paddrCallback);
+		~Decoder();
+	};
+}  // namespace Audio::AAC

include/audio/hle_core.hpp

@@ -2,10 +2,12 @@
 #include <array>
 #include <cassert>
 #include <deque>
+#include <memory>
 #include <queue>
 #include <vector>
 
 #include "audio/aac.hpp"
+#include "audio/aac_decoder.hpp"
 #include "audio/dsp_core.hpp"
 #include "audio/dsp_shared_mem.hpp"
 #include "memory.hpp"
@@ -33,8 +35,8 @@ namespace Audio {
 			SampleFormat format;
 			SourceType sourceType;
 
-			bool fromQueue = false;        // Is this buffer from the buffer queue or an embedded buffer?
-			bool hasPlayedOnce = false;    // Has the buffer been played at least once before?
+			bool fromQueue = false;      // Is this buffer from the buffer queue or an embedded buffer?
+			bool hasPlayedOnce = false;  // Has the buffer been played at least once before?
 
 			bool operator<(const Buffer& other) const {
 				// Lower ID = Higher priority
@@ -129,6 +131,8 @@ namespace Audio {
 		std::array<Source, Audio::HLE::sourceCount> sources;  // DSP voices
 		Audio::HLE::DspMemory dspRam;
 
+		std::unique_ptr<Audio::AAC::Decoder> aacDecoder;
+
 		void resetAudioPipe();
 		bool loaded = false;  // Have we loaded a component?