Add fdk-aac & AAC request structure

.gitmodules

@@ -76,3 +76,6 @@
 [submodule "third_party/metal-cpp"]
 	path = third_party/metal-cpp
 	url = https://github.com/Panda3DS-emu/metal-cpp
+[submodule "third_party/fdk-aac"]
+	path = third_party/fdk-aac
+	url = https://github.com/mstorsjo/fdk-aac/

CMakeLists.txt

@@ -225,6 +225,7 @@ else()
 endif()
 
 add_subdirectory(third_party/teakra EXCLUDE_FROM_ALL)
+add_subdirectory(third_party/fdk-aac)
 
 set(CAPSTONE_ARCHITECTURE_DEFAULT OFF)
 set(CAPSTONE_ARM_SUPPORT ON)
@@ -478,7 +479,7 @@ set(ALL_SOURCES ${SOURCE_FILES} ${FS_SOURCE_FILES} ${CRYPTO_SOURCE_FILES} ${KERN
     ${AUDIO_SOURCE_FILES} ${HEADER_FILES} ${FRONTEND_HEADER_FILES})
 target_sources(AlberCore PRIVATE ${ALL_SOURCES})
 
-target_link_libraries(AlberCore PRIVATE dynarmic cryptopp glad resources_console_fonts teakra)
+target_link_libraries(AlberCore PRIVATE dynarmic cryptopp glad resources_console_fonts teakra fdk-aac)
 target_link_libraries(AlberCore PUBLIC glad capstone)
 
 if(ENABLE_DISCORD_RPC AND NOT ANDROID)

include/audio/aac.hpp

@@ -54,6 +54,13 @@ namespace Audio::AAC {
 		u32_le sampleCount;
 	};
 
+	struct DecodeRequest {
+		u32_le address;        // Address of input AAC stream
+		u32_le size;           // Size of input AAC stream
+		u32_le destAddrLeft;   // Output address for left channel samples
+		u32_le destAddrRight;  // Output address for right channel samples
+	};
+
 	struct Message {
 		u16_le mode = Mode::None;  // Encode or decode AAC?
 		u16_le command = Command::Init;
@@ -62,7 +69,9 @@ namespace Audio::AAC {
 		// Info on the AAC request
 		union {
 			std::array<u8, 24> commandData{};
+
 			DecodeResponse decodeResponse;
+			DecodeRequest decodeRequest;
 		};
 	};