HLE DSP: Stub AAC

CMakeLists.txt

@@ -241,7 +241,7 @@ set(HEADER_FILES include/emulator.hpp include/helpers.hpp include/termcolor.hpp
                  include/PICA/dynapica/shader_rec_emitter_arm64.hpp include/scheduler.hpp include/applets/error_applet.hpp
                  include/audio/dsp_core.hpp include/audio/null_core.hpp include/audio/teakra_core.hpp
                  include/audio/miniaudio_device.hpp include/ring_buffer.hpp include/bitfield.hpp include/audio/dsp_shared_mem.hpp
-                 include/audio/hle_core.hpp include/capstone.hpp
+                 include/audio/hle_core.hpp include/capstone.hpp include/audio/aac.hpp
 )
 
 cmrc_add_resource_library(

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);

src/core/audio/hle_core.cpp

@@ -149,12 +149,24 @@ namespace Audio {
 				break;
 			}
 
-			case DSPPipeType::Binary:
-				Helpers::warn("Unimplemented write to binary pipe! Size: %d\n", size);
+			case DSPPipeType::Binary: {
+				log("Unimplemented write to binary pipe! Size: %d\n", size);
+
+				AAC::Message request;
+				if (size == sizeof(request)) {
+					std::array<u8, sizeof(request)> raw;
+					for (uint i = 0; i < size; i++) {
+						raw[i] = mem.read32(buffer + i);
+					}
+
+					std::memcpy(&request, raw.data(), sizeof(request));
+					handleAACRequest(request);
+				}
 
 				// This pipe and interrupt are normally used for requests like AAC decode
 				dspService.triggerPipeEvent(DSPPipeType::Binary);
 				break;
+			}
 
 			default: log("Audio::HLE_DSP: Wrote to unimplemented pipe %d\n", channel); break;
 		}
@@ -488,6 +500,37 @@ namespace Audio {
 		return decodedSamples;
 	}
 
+	void HLE_DSP::handleAACRequest(const AAC::Message& request) {
+		AAC::Message response = {};
+
+		switch (request.command) {
+			case AAC::Command::EncodeDecode:
+				// Dummy response to stop games from hanging
+				// TODO: Fix this when implementing AAC
+				response.resultCode = AAC::ResultCode::Success;
+				response.decodeResponse.channelCount = 2;
+				response.decodeResponse.sampleCount = 1024;
+				response.decodeResponse.size = 0;
+				response.decodeResponse.sampleRate = AAC::SampleRate::Rate48000;
+				break;
+
+			case AAC::Command::Init:
+			case AAC::Command::Shutdown:
+			case AAC::Command::LoadState:
+			case AAC::Command::SaveState:
+				response = request;
+				response.resultCode = AAC::ResultCode::Success;
+				break;
+				
+			default: Helpers::warn("Unknown AAC command type"); break;
+		}
+
+		// Copy response data to the binary pipe
+		auto& pipe = pipeData[DSPPipeType::Binary];
+		pipe.resize(sizeof(response));
+		std::memcpy(&pipe[0], &response, sizeof(response));
+	}
+
 	void DSPSource::reset() {
 		enabled = false;
 		isBufferIDDirty = false;