HLE DSP: Stub AAC

include/audio/aac.hpp

@@ -0,0 +1,71 @@
+#pragma once
+#include <array>
+#include <type_traits>
+
+#include "helpers.hpp"
+#include "swap.hpp"
+
+namespace Audio::AAC {
+	namespace ResultCode {
+		enum : u32 {
+			Success = 0,
+		};
+	}
+
+	// Enum values from Citra and struct definitions based off Citra
+	namespace Command {
+		enum : u16 {
+			Init = 0,          // Initialize encoder/decoder
+			EncodeDecode = 1,  // Encode/Decode AAC
+			Shutdown = 2,      // Shutdown encoder/decoder
+			LoadState = 3,
+			SaveState = 4,
+		};
+	}
+
+	namespace SampleRate {
+		enum : u32 {
+			Rate48000 = 0,
+			Rate44100 = 1,
+			Rate32000 = 2,
+			Rate24000 = 3,
+			Rate22050 = 4,
+			Rate16000 = 5,
+			Rate12000 = 6,
+			Rate11025 = 7,
+			Rate8000 = 8,
+		};
+	}
+
+	namespace Mode {
+		enum : u16 {
+			None = 0,
+			Decode = 1,
+			Encode = 2,
+		};
+	}
+
+	struct DecodeResponse {
+		u32_le sampleRate = SampleRate::Rate48000;
+		u32_le channelCount = 0;
+		u32_le size = 0;
+		u32_le unknown1 = 0;
+		u32_le unknown2 = 0;
+		u32_le sampleCount = 0;
+	};
+
+	struct Message {
+		u16_le mode = Mode::None;  // Encode or decode AAC?
+		u16_le command = Command::Init;
+		u32_le resultCode = ResultCode::Success;
+
+		// Info on the AAC request
+		union {
+			std::array<u8, 24> commandData = {};
+			DecodeResponse decodeResponse;
+		};
+	};
+
+	static_assert(sizeof(Message) == 32);
+	static_assert(std::is_trivially_copyable<Message>());
+}  // namespace Audio::AAC

include/audio/hle_core.hpp

@@ -5,6 +5,7 @@
 #include <queue>
 #include <vector>
 
+#include "audio/aac.hpp"
 #include "audio/dsp_core.hpp"
 #include "audio/dsp_shared_mem.hpp"
 #include "memory.hpp"
@@ -166,6 +167,7 @@ namespace Audio {
 			}
 		}
 
+		void handleAACRequest(const AAC::Message& request);
 		void updateSourceConfig(Source& source, HLE::SourceConfiguration::Configuration& config, s16_le* adpcmCoefficients);
 		void generateFrame(StereoFrame<s16>& frame);
 		void generateFrame(DSPSource& source);