early-access version 1255

src/core/hle/service/audio/audctl.cpp

@@ -0,0 +1,76 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/service/audio/audctl.h"
+
+namespace Service::Audio {
+
+AudCtl::AudCtl(Core::System& system_) : ServiceFramework{system_, "audctl"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "GetTargetVolume"},
+        {1, nullptr, "SetTargetVolume"},
+        {2, &AudCtl::GetTargetVolumeMin, "GetTargetVolumeMin"},
+        {3, &AudCtl::GetTargetVolumeMax, "GetTargetVolumeMax"},
+        {4, nullptr, "IsTargetMute"},
+        {5, nullptr, "SetTargetMute"},
+        {6, nullptr, "IsTargetConnected"},
+        {7, nullptr, "SetDefaultTarget"},
+        {8, nullptr, "GetDefaultTarget"},
+        {9, nullptr, "GetAudioOutputMode"},
+        {10, nullptr, "SetAudioOutputMode"},
+        {11, nullptr, "SetForceMutePolicy"},
+        {12, nullptr, "GetForceMutePolicy"},
+        {13, nullptr, "GetOutputModeSetting"},
+        {14, nullptr, "SetOutputModeSetting"},
+        {15, nullptr, "SetOutputTarget"},
+        {16, nullptr, "SetInputTargetForceEnabled"},
+        {17, nullptr, "SetHeadphoneOutputLevelMode"},
+        {18, nullptr, "GetHeadphoneOutputLevelMode"},
+        {19, nullptr, "AcquireAudioVolumeUpdateEventForPlayReport"},
+        {20, nullptr, "AcquireAudioOutputDeviceUpdateEventForPlayReport"},
+        {21, nullptr, "GetAudioOutputTargetForPlayReport"},
+        {22, nullptr, "NotifyHeadphoneVolumeWarningDisplayedEvent"},
+        {23, nullptr, "SetSystemOutputMasterVolume"},
+        {24, nullptr, "GetSystemOutputMasterVolume"},
+        {25, nullptr, "GetAudioVolumeDataForPlayReport"},
+        {26, nullptr, "UpdateHeadphoneSettings"},
+        {27, nullptr, "SetVolumeMappingTableForDev"},
+        {28, nullptr, "GetAudioOutputChannelCountForPlayReport"},
+        {29, nullptr, "BindAudioOutputChannelCountUpdateEventForPlayReport"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudCtl::~AudCtl() = default;
+
+void AudCtl::GetTargetVolumeMin(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Audio, "called.");
+
+    // This service function is currently hardcoded on the
+    // actual console to this value (as of 8.0.0).
+    constexpr s32 target_min_volume = 0;
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(target_min_volume);
+}
+
+void AudCtl::GetTargetVolumeMax(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Audio, "called.");
+
+    // This service function is currently hardcoded on the
+    // actual console to this value (as of 8.0.0).
+    constexpr s32 target_max_volume = 15;
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(target_max_volume);
+}
+
+} // namespace Service::Audio

src/core/hle/service/audio/audctl.h

@@ -0,0 +1,25 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class AudCtl final : public ServiceFramework<AudCtl> {
+public:
+    explicit AudCtl(Core::System& system_);
+    ~AudCtl() override;
+
+private:
+    void GetTargetVolumeMin(Kernel::HLERequestContext& ctx);
+    void GetTargetVolumeMax(Kernel::HLERequestContext& ctx);
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/auddbg.cpp

@@ -0,0 +1,22 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/auddbg.h"
+
+namespace Service::Audio {
+
+AudDbg::AudDbg(Core::System& system_, const char* name) : ServiceFramework{system_, name} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendForDebug"},
+        {1, nullptr, "RequestResumeForDebug"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudDbg::~AudDbg() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/auddbg.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class AudDbg final : public ServiceFramework<AudDbg> {
+public:
+    explicit AudDbg(Core::System& system_, const char* name);
+    ~AudDbg() override;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audin_a.cpp

@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audin_a.h"
+
+namespace Service::Audio {
+
+AudInA::AudInA(Core::System& system_) : ServiceFramework{system_, "audin:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendAudioIns"},
+        {1, nullptr, "RequestResumeAudioIns"},
+        {2, nullptr, "GetAudioInsProcessMasterVolume"},
+        {3, nullptr, "SetAudioInsProcessMasterVolume"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudInA::~AudInA() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/audin_a.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class AudInA final : public ServiceFramework<AudInA> {
+public:
+    explicit AudInA(Core::System& system_);
+    ~AudInA() override;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audin_u.cpp

@@ -0,0 +1,112 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/service/audio/audin_u.h"
+
+namespace Service::Audio {
+
+class IAudioIn final : public ServiceFramework<IAudioIn> {
+public:
+    explicit IAudioIn(Core::System& system_) : ServiceFramework{system_, "IAudioIn"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetAudioInState"},
+            {1, nullptr, "StartAudioIn"},
+            {2, nullptr, "StopAudioIn"},
+            {3, nullptr, "AppendAudioInBuffer"},
+            {4, nullptr, "RegisterBufferEvent"},
+            {5, nullptr, "GetReleasedAudioInBuffer"},
+            {6, nullptr, "ContainsAudioInBuffer"},
+            {7, nullptr, "AppendAudioInBufferWithUserEvent"},
+            {8, nullptr, "AppendAudioInBufferAuto"},
+            {9, nullptr, "GetReleasedAudioInBufferAuto"},
+            {10, nullptr, "AppendAudioInBufferWithUserEventAuto"},
+            {11, nullptr, "GetAudioInBufferCount"},
+            {12, nullptr, "SetAudioInDeviceGain"},
+            {13, nullptr, "GetAudioInDeviceGain"},
+            {14, nullptr, "FlushAudioInBuffers"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+AudInU::AudInU(Core::System& system_) : ServiceFramework{system_, "audin:u"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, &AudInU::ListAudioIns, "ListAudioIns"},
+        {1, &AudInU::OpenAudioIn, "OpenAudioIn"},
+        {2, &AudInU::ListAudioIns, "ListAudioInsAuto"},
+        {3, &AudInU::OpenAudioIn, "OpenAudioInAuto"},
+        {4, &AudInU::ListAudioInsAutoFiltered, "ListAudioInsAutoFiltered"},
+        {5, &AudInU::OpenAudioInProtocolSpecified, "OpenAudioInProtocolSpecified"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudInU::~AudInU() = default;
+
+void AudInU::ListAudioIns(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_Audio, "called");
+    const std::size_t count = ctx.GetWriteBufferSize() / sizeof(AudioInDeviceName);
+
+    const std::size_t device_count = std::min(count, audio_device_names.size());
+    std::vector<AudioInDeviceName> device_names;
+    device_names.reserve(device_count);
+
+    for (std::size_t i = 0; i < device_count; i++) {
+        const auto& device_name = audio_device_names[i];
+        auto& entry = device_names.emplace_back();
+        device_name.copy(entry.data(), device_name.size());
+    }
+
+    ctx.WriteBuffer(device_names);
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(static_cast<u32>(device_names.size()));
+}
+
+void AudInU::ListAudioInsAutoFiltered(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_Audio, "called");
+    constexpr u32 device_count = 0;
+
+    // Since we don't actually use any other audio input devices, we return 0 devices. Filtered
+    // device listing just omits the default input device
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(static_cast<u32>(device_count));
+}
+
+void AudInU::OpenInOutImpl(Kernel::HLERequestContext& ctx) {
+    AudInOutParams params{};
+    params.channel_count = 2;
+    params.sample_format = SampleFormat::PCM16;
+    params.sample_rate = 48000;
+    params.state = State::Started;
+
+    IPC::ResponseBuilder rb{ctx, 6, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushRaw<AudInOutParams>(params);
+    rb.PushIpcInterface<IAudioIn>(system);
+}
+
+void AudInU::OpenAudioIn(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service_Audio, "(STUBBED) called");
+    OpenInOutImpl(ctx);
+}
+
+void AudInU::OpenAudioInProtocolSpecified(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service_Audio, "(STUBBED) called");
+    OpenInOutImpl(ctx);
+}
+
+} // namespace Service::Audio

src/core/hle/service/audio/audin_u.h

@@ -0,0 +1,54 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+class HLERequestContext;
+}
+
+namespace Service::Audio {
+
+class AudInU final : public ServiceFramework<AudInU> {
+public:
+    explicit AudInU(Core::System& system_);
+    ~AudInU() override;
+
+private:
+    enum class SampleFormat : u32_le {
+        PCM16 = 2,
+    };
+
+    enum class State : u32_le {
+        Started = 0,
+        Stopped = 1,
+    };
+
+    struct AudInOutParams {
+        u32_le sample_rate{};
+        u32_le channel_count{};
+        SampleFormat sample_format{};
+        State state{};
+    };
+    static_assert(sizeof(AudInOutParams) == 0x10, "AudInOutParams is an invalid size");
+
+    using AudioInDeviceName = std::array<char, 256>;
+    static constexpr std::array<std::string_view, 1> audio_device_names{{
+        "BuiltInHeadset",
+    }};
+
+    void ListAudioIns(Kernel::HLERequestContext& ctx);
+    void ListAudioInsAutoFiltered(Kernel::HLERequestContext& ctx);
+    void OpenInOutImpl(Kernel::HLERequestContext& ctx);
+    void OpenAudioIn(Kernel::HLERequestContext& ctx);
+    void OpenAudioInProtocolSpecified(Kernel::HLERequestContext& ctx);
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audio.cpp

@@ -0,0 +1,41 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audctl.h"
+#include "core/hle/service/audio/auddbg.h"
+#include "core/hle/service/audio/audin_a.h"
+#include "core/hle/service/audio/audin_u.h"
+#include "core/hle/service/audio/audio.h"
+#include "core/hle/service/audio/audout_a.h"
+#include "core/hle/service/audio/audout_u.h"
+#include "core/hle/service/audio/audrec_a.h"
+#include "core/hle/service/audio/audrec_u.h"
+#include "core/hle/service/audio/audren_a.h"
+#include "core/hle/service/audio/audren_u.h"
+#include "core/hle/service/audio/codecctl.h"
+#include "core/hle/service/audio/hwopus.h"
+#include "core/hle/service/service.h"
+
+namespace Service::Audio {
+
+void InstallInterfaces(SM::ServiceManager& service_manager, Core::System& system) {
+    std::make_shared<AudCtl>(system)->InstallAsService(service_manager);
+    std::make_shared<AudOutA>(system)->InstallAsService(service_manager);
+    std::make_shared<AudOutU>(system)->InstallAsService(service_manager);
+    std::make_shared<AudInA>(system)->InstallAsService(service_manager);
+    std::make_shared<AudInU>(system)->InstallAsService(service_manager);
+    std::make_shared<AudRecA>(system)->InstallAsService(service_manager);
+    std::make_shared<AudRecU>(system)->InstallAsService(service_manager);
+    std::make_shared<AudRenA>(system)->InstallAsService(service_manager);
+    std::make_shared<AudRenU>(system)->InstallAsService(service_manager);
+    std::make_shared<CodecCtl>(system)->InstallAsService(service_manager);
+    std::make_shared<HwOpus>(system)->InstallAsService(service_manager);
+
+    std::make_shared<AudDbg>(system, "audin:d")->InstallAsService(service_manager);
+    std::make_shared<AudDbg>(system, "audout:d")->InstallAsService(service_manager);
+    std::make_shared<AudDbg>(system, "audrec:d")->InstallAsService(service_manager);
+    std::make_shared<AudDbg>(system, "audren:d")->InstallAsService(service_manager);
+}
+
+} // namespace Service::Audio

src/core/hle/service/audio/audio.h

@@ -0,0 +1,20 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Core {
+class System;
+}
+
+namespace Service::SM {
+class ServiceManager;
+}
+
+namespace Service::Audio {
+
+/// Registers all Audio services with the specified service manager.
+void InstallInterfaces(SM::ServiceManager& service_manager, Core::System& system);
+
+} // namespace Service::Audio

src/core/hle/service/audio/audout_a.cpp

@@ -0,0 +1,26 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audout_a.h"
+
+namespace Service::Audio {
+
+AudOutA::AudOutA(Core::System& system_) : ServiceFramework{system_, "audout:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendAudioOuts"},
+        {1, nullptr, "RequestResumeAudioOuts"},
+        {2, nullptr, "GetAudioOutsProcessMasterVolume"},
+        {3, nullptr, "SetAudioOutsProcessMasterVolume"},
+        {4, nullptr, "GetAudioOutsProcessRecordVolume"},
+        {5, nullptr, "SetAudioOutsProcessRecordVolume"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudOutA::~AudOutA() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/audout_a.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class AudOutA final : public ServiceFramework<AudOutA> {
+public:
+    explicit AudOutA(Core::System& system_);
+    ~AudOutA() override;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audout_u.cpp

@@ -0,0 +1,281 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <array>
+#include <cstring>
+#include <vector>
+
+#include "audio_core/audio_out.h"
+#include "audio_core/codec.h"
+#include "common/common_funcs.h"
+#include "common/logging/log.h"
+#include "common/swap.h"
+#include "core/core.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/readable_event.h"
+#include "core/hle/kernel/writable_event.h"
+#include "core/hle/service/audio/audout_u.h"
+#include "core/hle/service/audio/errors.h"
+#include "core/memory.h"
+
+namespace Service::Audio {
+
+constexpr std::array<char, 10> DefaultDevice{{"DeviceOut"}};
+constexpr int DefaultSampleRate{48000};
+
+struct AudoutParams {
+    s32_le sample_rate;
+    u16_le channel_count;
+    INSERT_PADDING_BYTES(2);
+};
+static_assert(sizeof(AudoutParams) == 0x8, "AudoutParams is an invalid size");
+
+enum class AudioState : u32 {
+    Started,
+    Stopped,
+};
+
+class IAudioOut final : public ServiceFramework<IAudioOut> {
+public:
+    IAudioOut(Core::System& system_, AudoutParams audio_params_, AudioCore::AudioOut& audio_core_,
+              std::string&& device_name_, std::string&& unique_name)
+        : ServiceFramework{system_, "IAudioOut"}, audio_core{audio_core_},
+          device_name{std::move(device_name_)}, audio_params{audio_params_}, main_memory{
+                                                                                 system.Memory()} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, &IAudioOut::GetAudioOutState, "GetAudioOutState"},
+            {1, &IAudioOut::StartAudioOut, "StartAudioOut"},
+            {2, &IAudioOut::StopAudioOut, "StopAudioOut"},
+            {3, &IAudioOut::AppendAudioOutBufferImpl, "AppendAudioOutBuffer"},
+            {4, &IAudioOut::RegisterBufferEvent, "RegisterBufferEvent"},
+            {5, &IAudioOut::GetReleasedAudioOutBufferImpl, "GetReleasedAudioOutBuffer"},
+            {6, &IAudioOut::ContainsAudioOutBuffer, "ContainsAudioOutBuffer"},
+            {7, &IAudioOut::AppendAudioOutBufferImpl, "AppendAudioOutBufferAuto"},
+            {8, &IAudioOut::GetReleasedAudioOutBufferImpl, "GetReleasedAudioOutBufferAuto"},
+            {9, &IAudioOut::GetAudioOutBufferCount, "GetAudioOutBufferCount"},
+            {10, nullptr, "GetAudioOutPlayedSampleCount"},
+            {11, nullptr, "FlushAudioOutBuffers"},
+            {12, &IAudioOut::SetAudioOutVolume, "SetAudioOutVolume"},
+            {13, &IAudioOut::GetAudioOutVolume, "GetAudioOutVolume"},
+        };
+        // clang-format on
+        RegisterHandlers(functions);
+
+        // This is the event handle used to check if the audio buffer was released
+        buffer_event =
+            Kernel::WritableEvent::CreateEventPair(system.Kernel(), "IAudioOutBufferReleased");
+
+        stream = audio_core.OpenStream(system.CoreTiming(), audio_params.sample_rate,
+                                       audio_params.channel_count, std::move(unique_name),
+                                       [this] { buffer_event.writable->Signal(); });
+    }
+
+private:
+    struct AudioBuffer {
+        u64_le next;
+        u64_le buffer;
+        u64_le buffer_capacity;
+        u64_le buffer_size;
+        u64_le offset;
+    };
+    static_assert(sizeof(AudioBuffer) == 0x28, "AudioBuffer is an invalid size");
+
+    void GetAudioOutState(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(static_cast<u32>(stream->IsPlaying() ? AudioState::Started : AudioState::Stopped));
+    }
+
+    void StartAudioOut(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        if (stream->IsPlaying()) {
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ERR_OPERATION_FAILED);
+            return;
+        }
+
+        audio_core.StartStream(stream);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void StopAudioOut(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        if (stream->IsPlaying()) {
+            audio_core.StopStream(stream);
+        }
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void RegisterBufferEvent(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushCopyObjects(buffer_event.readable);
+    }
+
+    void AppendAudioOutBufferImpl(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "(STUBBED) called {}", ctx.Description());
+        IPC::RequestParser rp{ctx};
+
+        const auto& input_buffer{ctx.ReadBuffer()};
+        ASSERT_MSG(input_buffer.size() == sizeof(AudioBuffer),
+                   "AudioBuffer input is an invalid size!");
+        AudioBuffer audio_buffer{};
+        std::memcpy(&audio_buffer, input_buffer.data(), sizeof(AudioBuffer));
+        const u64 tag{rp.Pop<u64>()};
+
+        std::vector<s16> samples(audio_buffer.buffer_size / sizeof(s16));
+        main_memory.ReadBlock(audio_buffer.buffer, samples.data(), audio_buffer.buffer_size);
+
+        if (!audio_core.QueueBuffer(stream, tag, std::move(samples))) {
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ERR_BUFFER_COUNT_EXCEEDED);
+            return;
+        }
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void GetReleasedAudioOutBufferImpl(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called {}", ctx.Description());
+
+        const u64 max_count{ctx.GetWriteBufferSize() / sizeof(u64)};
+        const auto released_buffers{audio_core.GetTagsAndReleaseBuffers(stream, max_count)};
+
+        std::vector<u64> tags{released_buffers};
+        tags.resize(max_count);
+        ctx.WriteBuffer(tags);
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(static_cast<u32>(released_buffers.size()));
+    }
+
+    void ContainsAudioOutBuffer(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::RequestParser rp{ctx};
+        const u64 tag{rp.Pop<u64>()};
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(stream->ContainsBuffer(tag));
+    }
+
+    void GetAudioOutBufferCount(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(static_cast<u32>(stream->GetQueueSize()));
+    }
+
+    void SetAudioOutVolume(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+        const float volume = rp.Pop<float>();
+        LOG_DEBUG(Service_Audio, "called, volume={}", volume);
+
+        stream->SetVolume(volume);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void GetAudioOutVolume(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(stream->GetVolume());
+    }
+
+    AudioCore::AudioOut& audio_core;
+    AudioCore::StreamPtr stream;
+    std::string device_name;
+
+    [[maybe_unused]] AudoutParams audio_params{};
+
+    /// This is the event handle used to check if the audio buffer was released
+    Kernel::EventPair buffer_event;
+    Core::Memory::Memory& main_memory;
+};
+
+AudOutU::AudOutU(Core::System& system_) : ServiceFramework{system_, "audout:u"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, &AudOutU::ListAudioOutsImpl, "ListAudioOuts"},
+        {1, &AudOutU::OpenAudioOutImpl, "OpenAudioOut"},
+        {2, &AudOutU::ListAudioOutsImpl, "ListAudioOutsAuto"},
+        {3, &AudOutU::OpenAudioOutImpl, "OpenAudioOutAuto"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+    audio_core = std::make_unique<AudioCore::AudioOut>();
+}
+
+AudOutU::~AudOutU() = default;
+
+void AudOutU::ListAudioOutsImpl(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_Audio, "called");
+
+    ctx.WriteBuffer(DefaultDevice);
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(1); // Amount of audio devices
+}
+
+void AudOutU::OpenAudioOutImpl(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_Audio, "called");
+
+    const auto device_name_data{ctx.ReadBuffer()};
+    std::string device_name;
+    if (device_name_data[0] != '\0') {
+        device_name.assign(device_name_data.begin(), device_name_data.end());
+    } else {
+        device_name.assign(DefaultDevice.begin(), DefaultDevice.end());
+    }
+    ctx.WriteBuffer(device_name);
+
+    IPC::RequestParser rp{ctx};
+    auto params{rp.PopRaw<AudoutParams>()};
+    if (params.channel_count <= 2) {
+        // Mono does not exist for audout
+        params.channel_count = 2;
+    } else {
+        params.channel_count = 6;
+    }
+    if (!params.sample_rate) {
+        params.sample_rate = DefaultSampleRate;
+    }
+
+    std::string unique_name{fmt::format("{}-{}", device_name, audio_out_interfaces.size())};
+    auto audio_out_interface = std::make_shared<IAudioOut>(
+        system, params, *audio_core, std::move(device_name), std::move(unique_name));
+
+    IPC::ResponseBuilder rb{ctx, 6, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(DefaultSampleRate);
+    rb.Push<u32>(params.channel_count);
+    rb.Push<u32>(static_cast<u32>(AudioCore::Codec::PcmFormat::Int16));
+    rb.Push<u32>(static_cast<u32>(AudioState::Stopped));
+    rb.PushIpcInterface<IAudioOut>(audio_out_interface);
+
+    audio_out_interfaces.push_back(std::move(audio_out_interface));
+}
+
+} // namespace Service::Audio

src/core/hle/service/audio/audout_u.h

@@ -0,0 +1,39 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+#include "core/hle/service/service.h"
+
+namespace AudioCore {
+class AudioOut;
+}
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+class HLERequestContext;
+}
+
+namespace Service::Audio {
+
+class IAudioOut;
+
+class AudOutU final : public ServiceFramework<AudOutU> {
+public:
+    explicit AudOutU(Core::System& system_);
+    ~AudOutU() override;
+
+private:
+    void ListAudioOutsImpl(Kernel::HLERequestContext& ctx);
+    void OpenAudioOutImpl(Kernel::HLERequestContext& ctx);
+
+    std::vector<std::shared_ptr<IAudioOut>> audio_out_interfaces;
+    std::unique_ptr<AudioCore::AudioOut> audio_core;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audrec_a.cpp

@@ -0,0 +1,22 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audrec_a.h"
+
+namespace Service::Audio {
+
+AudRecA::AudRecA(Core::System& system_) : ServiceFramework{system_, "audrec:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendFinalOutputRecorders"},
+        {1, nullptr, "RequestResumeFinalOutputRecorders"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudRecA::~AudRecA() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/audrec_a.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class AudRecA final : public ServiceFramework<AudRecA> {
+public:
+    explicit AudRecA(Core::System& system_);
+    ~AudRecA() override;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audrec_u.cpp

@@ -0,0 +1,42 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audrec_u.h"
+
+namespace Service::Audio {
+
+class IFinalOutputRecorder final : public ServiceFramework<IFinalOutputRecorder> {
+public:
+    explicit IFinalOutputRecorder(Core::System& system_)
+        : ServiceFramework{system_, "IFinalOutputRecorder"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetFinalOutputRecorderState"},
+            {1, nullptr, "StartFinalOutputRecorder"},
+            {2, nullptr, "StopFinalOutputRecorder"},
+            {3, nullptr, "AppendFinalOutputRecorderBuffer"},
+            {4, nullptr, "RegisterBufferEvent"},
+            {5, nullptr, "GetReleasedFinalOutputRecorderBuffer"},
+            {6, nullptr, "ContainsFinalOutputRecorderBuffer"},
+            {7, nullptr, "GetFinalOutputRecorderBufferEndTime"},
+            {8, nullptr, "AppendFinalOutputRecorderBufferAuto"},
+            {9, nullptr, "GetReleasedFinalOutputRecorderBufferAuto"},
+            {10, nullptr, "FlushFinalOutputRecorderBuffers"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+AudRecU::AudRecU(Core::System& system_) : ServiceFramework{system_, "audrec:u"} {
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "OpenFinalOutputRecorder"},
+    };
+    RegisterHandlers(functions);
+}
+
+AudRecU::~AudRecU() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/audrec_u.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class AudRecU final : public ServiceFramework<AudRecU> {
+public:
+    explicit AudRecU(Core::System& system_);
+    ~AudRecU() override;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audren_a.cpp

@@ -0,0 +1,28 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/audren_a.h"
+
+namespace Service::Audio {
+
+AudRenA::AudRenA(Core::System& system_) : ServiceFramework{system_, "audren:a"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "RequestSuspendAudioRenderers"},
+        {1, nullptr, "RequestResumeAudioRenderers"},
+        {2, nullptr, "GetAudioRenderersProcessMasterVolume"},
+        {3, nullptr, "SetAudioRenderersProcessMasterVolume"},
+        {4, nullptr, "RegisterAppletResourceUserId"},
+        {5, nullptr, "UnregisterAppletResourceUserId"},
+        {6, nullptr, "GetAudioRenderersProcessRecordVolume"},
+        {7, nullptr, "SetAudioRenderersProcessRecordVolume"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudRenA::~AudRenA() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/audren_a.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class AudRenA final : public ServiceFramework<AudRenA> {
+public:
+    explicit AudRenA(Core::System& system_);
+    ~AudRenA() override;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/audren_u.cpp

@@ -0,0 +1,713 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <array>
+#include <memory>
+#include <string_view>
+
+#include "audio_core/audio_renderer.h"
+#include "common/alignment.h"
+#include "common/bit_util.h"
+#include "common/common_funcs.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/readable_event.h"
+#include "core/hle/kernel/writable_event.h"
+#include "core/hle/service/audio/audren_u.h"
+#include "core/hle/service/audio/errors.h"
+
+namespace Service::Audio {
+
+class IAudioRenderer final : public ServiceFramework<IAudioRenderer> {
+public:
+    explicit IAudioRenderer(Core::System& system, AudioCommon::AudioRendererParameter audren_params,
+                            const std::size_t instance_number)
+        : ServiceFramework{system, "IAudioRenderer"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, &IAudioRenderer::GetSampleRate, "GetSampleRate"},
+            {1, &IAudioRenderer::GetSampleCount, "GetSampleCount"},
+            {2, &IAudioRenderer::GetMixBufferCount, "GetMixBufferCount"},
+            {3, &IAudioRenderer::GetState, "GetState"},
+            {4, &IAudioRenderer::RequestUpdateImpl, "RequestUpdate"},
+            {5, &IAudioRenderer::Start, "Start"},
+            {6, &IAudioRenderer::Stop, "Stop"},
+            {7, &IAudioRenderer::QuerySystemEvent, "QuerySystemEvent"},
+            {8, &IAudioRenderer::SetRenderingTimeLimit, "SetRenderingTimeLimit"},
+            {9, &IAudioRenderer::GetRenderingTimeLimit, "GetRenderingTimeLimit"},
+            {10, &IAudioRenderer::RequestUpdateImpl, "RequestUpdateAuto"},
+            {11, &IAudioRenderer::ExecuteAudioRendererRendering, "ExecuteAudioRendererRendering"},
+        };
+        // clang-format on
+        RegisterHandlers(functions);
+
+        system_event =
+            Kernel::WritableEvent::CreateEventPair(system.Kernel(), "IAudioRenderer:SystemEvent");
+        renderer = std::make_unique<AudioCore::AudioRenderer>(system.CoreTiming(), system.Memory(),
+                                                              audren_params, system_event.writable,
+                                                              instance_number);
+    }
+
+private:
+    void UpdateAudioCallback() {
+        system_event.writable->Signal();
+    }
+
+    void GetSampleRate(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(renderer->GetSampleRate());
+    }
+
+    void GetSampleCount(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(renderer->GetSampleCount());
+    }
+
+    void GetState(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(static_cast<u32>(renderer->GetStreamState()));
+    }
+
+    void GetMixBufferCount(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(renderer->GetMixBufferCount());
+    }
+
+    void RequestUpdateImpl(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "(STUBBED) called");
+
+        std::vector<u8> output_params(ctx.GetWriteBufferSize());
+        auto result = renderer->UpdateAudioRenderer(ctx.ReadBuffer(), output_params);
+
+        if (result.IsSuccess()) {
+            ctx.WriteBuffer(output_params);
+        }
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(result);
+    }
+
+    void Start(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 2};
+
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void Stop(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 2};
+
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void QuerySystemEvent(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushCopyObjects(system_event.readable);
+    }
+
+    void SetRenderingTimeLimit(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+        rendering_time_limit_percent = rp.Pop<u32>();
+        LOG_DEBUG(Service_Audio, "called. rendering_time_limit_percent={}",
+                  rendering_time_limit_percent);
+
+        ASSERT(rendering_time_limit_percent <= 100);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void GetRenderingTimeLimit(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(rendering_time_limit_percent);
+    }
+
+    void ExecuteAudioRendererRendering(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        // This service command currently only reports an unsupported operation
+        // error code, or aborts. Given that, we just always return an error
+        // code in this case.
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ERR_NOT_SUPPORTED);
+    }
+
+    Kernel::EventPair system_event;
+    std::unique_ptr<AudioCore::AudioRenderer> renderer;
+    u32 rendering_time_limit_percent = 100;
+};
+
+class IAudioDevice final : public ServiceFramework<IAudioDevice> {
+public:
+    explicit IAudioDevice(Core::System& system_, u32_le revision_num)
+        : ServiceFramework{system_, "IAudioDevice"}, revision{revision_num} {
+        static const FunctionInfo functions[] = {
+            {0, &IAudioDevice::ListAudioDeviceName, "ListAudioDeviceName"},
+            {1, &IAudioDevice::SetAudioDeviceOutputVolume, "SetAudioDeviceOutputVolume"},
+            {2, &IAudioDevice::GetAudioDeviceOutputVolume, "GetAudioDeviceOutputVolume"},
+            {3, &IAudioDevice::GetActiveAudioDeviceName, "GetActiveAudioDeviceName"},
+            {4, &IAudioDevice::QueryAudioDeviceSystemEvent, "QueryAudioDeviceSystemEvent"},
+            {5, &IAudioDevice::GetActiveChannelCount, "GetActiveChannelCount"},
+            {6, &IAudioDevice::ListAudioDeviceName, "ListAudioDeviceNameAuto"},
+            {7, &IAudioDevice::SetAudioDeviceOutputVolume, "SetAudioDeviceOutputVolumeAuto"},
+            {8, &IAudioDevice::GetAudioDeviceOutputVolume, "GetAudioDeviceOutputVolumeAuto"},
+            {10, &IAudioDevice::GetActiveAudioDeviceName, "GetActiveAudioDeviceNameAuto"},
+            {11, &IAudioDevice::QueryAudioDeviceInputEvent, "QueryAudioDeviceInputEvent"},
+            {12, &IAudioDevice::QueryAudioDeviceOutputEvent, "QueryAudioDeviceOutputEvent"},
+            {13, nullptr, "GetAudioSystemMasterVolumeSetting"},
+        };
+        RegisterHandlers(functions);
+
+        auto& kernel = system.Kernel();
+        buffer_event =
+            Kernel::WritableEvent::CreateEventPair(kernel, "IAudioOutBufferReleasedEvent");
+
+        // Should be similar to audio_output_device_switch_event
+        audio_input_device_switch_event = Kernel::WritableEvent::CreateEventPair(
+            kernel, "IAudioDevice:AudioInputDeviceSwitchedEvent");
+
+        // Should only be signalled when an audio output device has been changed, example: speaker
+        // to headset
+        audio_output_device_switch_event = Kernel::WritableEvent::CreateEventPair(
+            kernel, "IAudioDevice:AudioOutputDeviceSwitchedEvent");
+    }
+
+private:
+    using AudioDeviceName = std::array<char, 256>;
+    static constexpr std::array<std::string_view, 4> audio_device_names{{
+        "AudioStereoJackOutput",
+        "AudioBuiltInSpeakerOutput",
+        "AudioTvOutput",
+        "AudioUsbDeviceOutput",
+    }};
+    enum class DeviceType {
+        AHUBHeadphones,
+        AHUBSpeakers,
+        HDA,
+        USBOutput,
+    };
+
+    void ListAudioDeviceName(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        const bool usb_output_supported =
+            IsFeatureSupported(AudioFeatures::AudioUSBDeviceOutput, revision);
+        const std::size_t count = ctx.GetWriteBufferSize() / sizeof(AudioDeviceName);
+
+        std::vector<AudioDeviceName> name_buffer;
+        name_buffer.reserve(audio_device_names.size());
+
+        for (std::size_t i = 0; i < count && i < audio_device_names.size(); i++) {
+            const auto type = static_cast<DeviceType>(i);
+
+            if (!usb_output_supported && type == DeviceType::USBOutput) {
+                continue;
+            }
+
+            const auto& device_name = audio_device_names[i];
+            auto& entry = name_buffer.emplace_back();
+            device_name.copy(entry.data(), device_name.size());
+        }
+
+        ctx.WriteBuffer(name_buffer);
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(static_cast<u32>(name_buffer.size()));
+    }
+
+    void SetAudioDeviceOutputVolume(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+        const f32 volume = rp.Pop<f32>();
+
+        const auto device_name_buffer = ctx.ReadBuffer();
+        const std::string name = Common::StringFromBuffer(device_name_buffer);
+
+        LOG_WARNING(Service_Audio, "(STUBBED) called. name={}, volume={}", name, volume);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void GetAudioDeviceOutputVolume(Kernel::HLERequestContext& ctx) {
+        const auto device_name_buffer = ctx.ReadBuffer();
+        const std::string name = Common::StringFromBuffer(device_name_buffer);
+
+        LOG_WARNING(Service_Audio, "(STUBBED) called. name={}", name);
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(1.0f);
+    }
+
+    void GetActiveAudioDeviceName(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
+
+        // Currently set to always be TV audio output.
+        const auto& device_name = audio_device_names[2];
+
+        AudioDeviceName out_device_name{};
+        device_name.copy(out_device_name.data(), device_name.size());
+
+        ctx.WriteBuffer(out_device_name);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void QueryAudioDeviceSystemEvent(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
+
+        buffer_event.writable->Signal();
+
+        IPC::ResponseBuilder rb{ctx, 2, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushCopyObjects(buffer_event.readable);
+    }
+
+    void GetActiveChannelCount(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(1);
+    }
+
+    // Should be similar to QueryAudioDeviceOutputEvent
+    void QueryAudioDeviceInputEvent(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_Audio, "(STUBBED) called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushCopyObjects(audio_input_device_switch_event.readable);
+    }
+
+    void QueryAudioDeviceOutputEvent(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_Audio, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushCopyObjects(audio_output_device_switch_event.readable);
+    }
+
+    u32_le revision = 0;
+    Kernel::EventPair buffer_event;
+    Kernel::EventPair audio_input_device_switch_event;
+    Kernel::EventPair audio_output_device_switch_event;
+
+}; // namespace Audio
+
+AudRenU::AudRenU(Core::System& system_) : ServiceFramework{system_, "audren:u"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, &AudRenU::OpenAudioRenderer, "OpenAudioRenderer"},
+        {1, &AudRenU::GetAudioRendererWorkBufferSize, "GetAudioRendererWorkBufferSize"},
+        {2, &AudRenU::GetAudioDeviceService, "GetAudioDeviceService"},
+        {3, &AudRenU::OpenAudioRendererAuto, "OpenAudioRendererAuto"},
+        {4, &AudRenU::GetAudioDeviceServiceWithRevisionInfo, "GetAudioDeviceServiceWithRevisionInfo"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AudRenU::~AudRenU() = default;
+
+void AudRenU::OpenAudioRenderer(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_Audio, "called");
+
+    OpenAudioRendererImpl(ctx);
+}
+
+static u64 CalculateNumPerformanceEntries(const AudioCommon::AudioRendererParameter& params) {
+    // +1 represents the final mix.
+    return u64{params.effect_count} + params.submix_count + params.sink_count + params.voice_count +
+           1;
+}
+
+void AudRenU::GetAudioRendererWorkBufferSize(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_Audio, "called");
+
+    // Several calculations below align the sizes being calculated
+    // onto a 64 byte boundary.
+    static constexpr u64 buffer_alignment_size = 64;
+
+    // Some calculations that calculate portions of the buffer
+    // that will contain information, on the other hand, align
+    // the result of some of their calcularions on a 16 byte boundary.
+    static constexpr u64 info_field_alignment_size = 16;
+
+    // Maximum detail entries that may exist at one time for performance
+    // frame statistics.
+    static constexpr u64 max_perf_detail_entries = 100;
+
+    // Size of the data structure representing the bulk of the voice-related state.
+    static constexpr u64 voice_state_size = 0x100;
+
+    // Size of the upsampler manager data structure
+    constexpr u64 upsampler_manager_size = 0x48;
+
+    // Calculates the part of the size that relates to mix buffers.
+    const auto calculate_mix_buffer_sizes = [](const AudioCommon::AudioRendererParameter& params) {
+        // As of 8.0.0 this is the maximum on voice channels.
+        constexpr u64 max_voice_channels = 6;
+
+        // The service expects the sample_count member of the parameters to either be
+        // a value of 160 or 240, so the maximum sample count is assumed in order
+        // to adequately handle all values at runtime.
+        constexpr u64 default_max_sample_count = 240;
+
+        const u64 total_mix_buffers = params.mix_buffer_count + max_voice_channels;
+
+        u64 size = 0;
+        size += total_mix_buffers * (sizeof(s32) * params.sample_count);
+        size += total_mix_buffers * (sizeof(s32) * default_max_sample_count);
+        size += u64{params.submix_count} + params.sink_count;
+        size = Common::AlignUp(size, buffer_alignment_size);
+        size += Common::AlignUp(params.unknown_30, buffer_alignment_size);
+        size += Common::AlignUp(sizeof(s32) * params.mix_buffer_count, buffer_alignment_size);
+        return size;
+    };
+
+    // Calculates the portion of the size related to the mix data (and the sorting thereof).
+    const auto calculate_mix_info_size = [](const AudioCommon::AudioRendererParameter& params) {
+        // The size of the mixing info data structure.
+        constexpr u64 mix_info_size = 0x940;
+
+        // Consists of total submixes with the final mix included.
+        const u64 total_mix_count = u64{params.submix_count} + 1;
+
+        // The total number of effects that may be available to the audio renderer at any time.
+        constexpr u64 max_effects = 256;
+
+        // Calculates the part of the size related to the audio node state.
+        // This will only be used if the audio revision supports the splitter.
+        const auto calculate_node_state_size = [](std::size_t num_nodes) {
+            // Internally within a nodestate, it appears to use a data structure
+            // similar to a std::bitset<64> twice.
+            constexpr u64 bit_size = Common::BitSize<u64>();
+            constexpr u64 num_bitsets = 2;
+
+            // Node state instances have three states internally for performing
+            // depth-first searches of nodes. Initialized, Found, and Done Sorting.
+            constexpr u64 num_states = 3;
+
+            u64 size = 0;
+            size += (num_nodes * num_nodes) * sizeof(s32);
+            size += num_states * (num_nodes * sizeof(s32));
+            size += num_bitsets * (Common::AlignUp(num_nodes, bit_size) / Common::BitSize<u8>());
+            return size;
+        };
+
+        // Calculates the part of the size related to the adjacency (aka edge) matrix.
+        const auto calculate_edge_matrix_size = [](std::size_t num_nodes) {
+            return (num_nodes * num_nodes) * sizeof(s32);
+        };
+
+        u64 size = 0;
+        size += Common::AlignUp(sizeof(void*) * total_mix_count, info_field_alignment_size);
+        size += Common::AlignUp(mix_info_size * total_mix_count, info_field_alignment_size);
+        size += Common::AlignUp(sizeof(s32) * max_effects * params.submix_count,
+                                info_field_alignment_size);
+
+        if (IsFeatureSupported(AudioFeatures::Splitter, params.revision)) {
+            size += Common::AlignUp(calculate_node_state_size(total_mix_count) +
+                                        calculate_edge_matrix_size(total_mix_count),
+                                    info_field_alignment_size);
+        }
+
+        return size;
+    };
+
+    // Calculates the part of the size related to voice channel info.
+    const auto calculate_voice_info_size = [](const AudioCommon::AudioRendererParameter& params) {
+        constexpr u64 voice_info_size = 0x220;
+        constexpr u64 voice_resource_size = 0xD0;
+
+        u64 size = 0;
+        size += Common::AlignUp(sizeof(void*) * params.voice_count, info_field_alignment_size);
+        size += Common::AlignUp(voice_info_size * params.voice_count, info_field_alignment_size);
+        size +=
+            Common::AlignUp(voice_resource_size * params.voice_count, info_field_alignment_size);
+        size += Common::AlignUp(voice_state_size * params.voice_count, info_field_alignment_size);
+        return size;
+    };
+
+    // Calculates the part of the size related to memory pools.
+    const auto calculate_memory_pools_size = [](const AudioCommon::AudioRendererParameter& params) {
+        const u64 num_memory_pools = sizeof(s32) * (u64{params.effect_count} + params.voice_count);
+        const u64 memory_pool_info_size = 0x20;
+        return Common::AlignUp(num_memory_pools * memory_pool_info_size, info_field_alignment_size);
+    };
+
+    // Calculates the part of the size related to the splitter context.
+    const auto calculate_splitter_context_size =
+        [](const AudioCommon::AudioRendererParameter& params) -> u64 {
+        if (!IsFeatureSupported(AudioFeatures::Splitter, params.revision)) {
+            return 0;
+        }
+
+        constexpr u64 splitter_info_size = 0x20;
+        constexpr u64 splitter_destination_data_size = 0xE0;
+
+        u64 size = 0;
+        size += params.num_splitter_send_channels;
+        size +=
+            Common::AlignUp(splitter_info_size * params.splitter_count, info_field_alignment_size);
+        size += Common::AlignUp(splitter_destination_data_size * params.num_splitter_send_channels,
+                                info_field_alignment_size);
+
+        return size;
+    };
+
+    // Calculates the part of the size related to the upsampler info.
+    const auto calculate_upsampler_info_size =
+        [](const AudioCommon::AudioRendererParameter& params) {
+            constexpr u64 upsampler_info_size = 0x280;
+            // Yes, using the buffer size over info alignment size is intentional here.
+            return Common::AlignUp(upsampler_info_size *
+                                       (u64{params.submix_count} + params.sink_count),
+                                   buffer_alignment_size);
+        };
+
+    // Calculates the part of the size related to effect info.
+    const auto calculate_effect_info_size = [](const AudioCommon::AudioRendererParameter& params) {
+        constexpr u64 effect_info_size = 0x2B0;
+        return Common::AlignUp(effect_info_size * params.effect_count, info_field_alignment_size);
+    };
+
+    // Calculates the part of the size related to audio sink info.
+    const auto calculate_sink_info_size = [](const AudioCommon::AudioRendererParameter& params) {
+        const u64 sink_info_size = 0x170;
+        return Common::AlignUp(sink_info_size * params.sink_count, info_field_alignment_size);
+    };
+
+    // Calculates the part of the size related to voice state info.
+    const auto calculate_voice_state_size = [](const AudioCommon::AudioRendererParameter& params) {
+        const u64 voice_state_size = 0x100;
+        const u64 additional_size = buffer_alignment_size - 1;
+        return Common::AlignUp(voice_state_size * params.voice_count + additional_size,
+                               info_field_alignment_size);
+    };
+
+    // Calculates the part of the size related to performance statistics.
+    const auto calculate_perf_size = [](const AudioCommon::AudioRendererParameter& params) {
+        // Extra size value appended to the end of the calculation.
+        constexpr u64 appended = 128;
+
+        // Whether or not we assume the newer version of performance metrics data structures.
+        const bool is_v2 =
+            IsFeatureSupported(AudioFeatures::PerformanceMetricsVersion2, params.revision);
+
+        // Data structure sizes
+        constexpr u64 perf_statistics_size = 0x0C;
+        const u64 header_size = is_v2 ? 0x30 : 0x18;
+        const u64 entry_size = is_v2 ? 0x18 : 0x10;
+        const u64 detail_size = is_v2 ? 0x18 : 0x10;
+
+        const u64 entry_count = CalculateNumPerformanceEntries(params);
+        const u64 size_per_frame =
+            header_size + (entry_size * entry_count) + (detail_size * max_perf_detail_entries);
+
+        u64 size = 0;
+        size += Common::AlignUp(size_per_frame * params.performance_frame_count + 1,
+                                buffer_alignment_size);
+        size += Common::AlignUp(perf_statistics_size, buffer_alignment_size);
+        size += appended;
+        return size;
+    };
+
+    // Calculates the part of the size that relates to the audio command buffer.
+    const auto calculate_command_buffer_size =
+        [](const AudioCommon::AudioRendererParameter& params) {
+            constexpr u64 alignment = (buffer_alignment_size - 1) * 2;
+
+            if (!IsFeatureSupported(AudioFeatures::VariadicCommandBuffer, params.revision)) {
+                constexpr u64 command_buffer_size = 0x18000;
+
+                return command_buffer_size + alignment;
+            }
+
+            // When the variadic command buffer is supported, this means
+            // the command generator for the audio renderer can issue commands
+            // that are (as one would expect), variable in size. So what we need to do
+            // is determine the maximum possible size for a few command data structures
+            // then multiply them by the amount of present commands indicated by the given
+            // respective audio parameters.
+
+            constexpr u64 max_biquad_filters = 2;
+            constexpr u64 max_mix_buffers = 24;
+
+            constexpr u64 biquad_filter_command_size = 0x2C;
+
+            constexpr u64 depop_mix_command_size = 0x24;
+            constexpr u64 depop_setup_command_size = 0x50;
+
+            constexpr u64 effect_command_max_size = 0x540;
+
+            constexpr u64 mix_command_size = 0x1C;
+            constexpr u64 mix_ramp_command_size = 0x24;
+            constexpr u64 mix_ramp_grouped_command_size = 0x13C;
+
+            constexpr u64 perf_command_size = 0x28;
+
+            constexpr u64 sink_command_size = 0x130;
+
+            constexpr u64 submix_command_max_size =
+                depop_mix_command_size + (mix_command_size * max_mix_buffers) * max_mix_buffers;
+
+            constexpr u64 volume_command_size = 0x1C;
+            constexpr u64 volume_ramp_command_size = 0x20;
+
+            constexpr u64 voice_biquad_filter_command_size =
+                biquad_filter_command_size * max_biquad_filters;
+            constexpr u64 voice_data_command_size = 0x9C;
+            const u64 voice_command_max_size =
+                (params.splitter_count * depop_setup_command_size) +
+                (voice_data_command_size + voice_biquad_filter_command_size +
+                 volume_ramp_command_size + mix_ramp_grouped_command_size);
+
+            // Now calculate the individual elements that comprise the size and add them together.
+            const u64 effect_commands_size = params.effect_count * effect_command_max_size;
+
+            const u64 final_mix_commands_size =
+                depop_mix_command_size + volume_command_size * max_mix_buffers;
+
+            const u64 perf_commands_size =
+                perf_command_size *
+                (CalculateNumPerformanceEntries(params) + max_perf_detail_entries);
+
+            const u64 sink_commands_size = params.sink_count * sink_command_size;
+
+            const u64 splitter_commands_size =
+                params.num_splitter_send_channels * max_mix_buffers * mix_ramp_command_size;
+
+            const u64 submix_commands_size = params.submix_count * submix_command_max_size;
+
+            const u64 voice_commands_size = params.voice_count * voice_command_max_size;
+
+            return effect_commands_size + final_mix_commands_size + perf_commands_size +
+                   sink_commands_size + splitter_commands_size + submix_commands_size +
+                   voice_commands_size + alignment;
+        };
+
+    IPC::RequestParser rp{ctx};
+    const auto params = rp.PopRaw<AudioCommon::AudioRendererParameter>();
+
+    u64 size = 0;
+    size += calculate_mix_buffer_sizes(params);
+    size += calculate_mix_info_size(params);
+    size += calculate_voice_info_size(params);
+    size += upsampler_manager_size;
+    size += calculate_memory_pools_size(params);
+    size += calculate_splitter_context_size(params);
+
+    size = Common::AlignUp(size, buffer_alignment_size);
+
+    size += calculate_upsampler_info_size(params);
+    size += calculate_effect_info_size(params);
+    size += calculate_sink_info_size(params);
+    size += calculate_voice_state_size(params);
+    size += calculate_perf_size(params);
+    size += calculate_command_buffer_size(params);
+
+    // finally, 4KB page align the size, and we're done.
+    size = Common::AlignUp(size, 4096);
+
+    IPC::ResponseBuilder rb{ctx, 4};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u64>(size);
+
+    LOG_DEBUG(Service_Audio, "buffer_size=0x{:X}", size);
+}
+
+void AudRenU::GetAudioDeviceService(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const u64 aruid = rp.Pop<u64>();
+
+    LOG_DEBUG(Service_Audio, "called. aruid={:016X}", aruid);
+
+    // Revisionless variant of GetAudioDeviceServiceWithRevisionInfo that
+    // always assumes the initial release revision (REV1).
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IAudioDevice>(system, Common::MakeMagic('R', 'E', 'V', '1'));
+}
+
+void AudRenU::OpenAudioRendererAuto(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_Audio, "called");
+
+    OpenAudioRendererImpl(ctx);
+}
+
+void AudRenU::GetAudioDeviceServiceWithRevisionInfo(Kernel::HLERequestContext& ctx) {
+    struct Parameters {
+        u32 revision;
+        u64 aruid;
+    };
+
+    IPC::RequestParser rp{ctx};
+    const auto [revision, aruid] = rp.PopRaw<Parameters>();
+
+    LOG_DEBUG(Service_Audio, "called. revision={:08X}, aruid={:016X}", revision, aruid);
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IAudioDevice>(system, revision);
+}
+
+void AudRenU::OpenAudioRendererImpl(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto params = rp.PopRaw<AudioCommon::AudioRendererParameter>();
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IAudioRenderer>(system, params, audren_instance_count++);
+}
+
+bool IsFeatureSupported(AudioFeatures feature, u32_le revision) {
+    // Byte swap
+    const u32_be version_num = revision - Common::MakeMagic('R', 'E', 'V', '0');
+
+    switch (feature) {
+    case AudioFeatures::AudioUSBDeviceOutput:
+        return version_num >= 4U;
+    case AudioFeatures::Splitter:
+        return version_num >= 2U;
+    case AudioFeatures::PerformanceMetricsVersion2:
+    case AudioFeatures::VariadicCommandBuffer:
+        return version_num >= 5U;
+    default:
+        return false;
+    }
+}
+
+} // namespace Service::Audio

src/core/hle/service/audio/audren_u.h

@@ -0,0 +1,47 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+class HLERequestContext;
+}
+
+namespace Service::Audio {
+
+class AudRenU final : public ServiceFramework<AudRenU> {
+public:
+    explicit AudRenU(Core::System& system_);
+    ~AudRenU() override;
+
+private:
+    void OpenAudioRenderer(Kernel::HLERequestContext& ctx);
+    void GetAudioRendererWorkBufferSize(Kernel::HLERequestContext& ctx);
+    void GetAudioDeviceService(Kernel::HLERequestContext& ctx);
+    void OpenAudioRendererAuto(Kernel::HLERequestContext& ctx);
+    void GetAudioDeviceServiceWithRevisionInfo(Kernel::HLERequestContext& ctx);
+
+    void OpenAudioRendererImpl(Kernel::HLERequestContext& ctx);
+
+    std::size_t audren_instance_count = 0;
+};
+
+// Describes a particular audio feature that may be supported in a particular revision.
+enum class AudioFeatures : u32 {
+    AudioUSBDeviceOutput,
+    Splitter,
+    PerformanceMetricsVersion2,
+    VariadicCommandBuffer,
+};
+
+// Tests if a particular audio feature is supported with a given audio revision.
+bool IsFeatureSupported(AudioFeatures feature, u32_le revision);
+
+} // namespace Service::Audio

src/core/hle/service/audio/codecctl.cpp

@@ -0,0 +1,30 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/audio/codecctl.h"
+
+namespace Service::Audio {
+
+CodecCtl::CodecCtl(Core::System& system_) : ServiceFramework{system_, "codecctl"} {
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "InitializeCodecController"},
+        {1, nullptr, "FinalizeCodecController"},
+        {2, nullptr, "SleepCodecController"},
+        {3, nullptr, "WakeCodecController"},
+        {4, nullptr, "SetCodecVolume"},
+        {5, nullptr, "GetCodecVolumeMax"},
+        {6, nullptr, "GetCodecVolumeMin"},
+        {7, nullptr, "SetCodecActiveTarget"},
+        {8, nullptr, "GetCodecActiveTarget"},
+        {9, nullptr, "BindCodecHeadphoneMicJackInterrupt"},
+        {10, nullptr, "IsCodecHeadphoneMicJackInserted"},
+        {11, nullptr, "ClearCodecHeadphoneMicJackInterrupt"},
+        {12, nullptr, "IsCodecDeviceRequested"},
+    };
+    RegisterHandlers(functions);
+}
+
+CodecCtl::~CodecCtl() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/codecctl.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class CodecCtl final : public ServiceFramework<CodecCtl> {
+public:
+    explicit CodecCtl(Core::System& system_);
+    ~CodecCtl() override;
+};
+
+} // namespace Service::Audio

src/core/hle/service/audio/errors.h

@@ -0,0 +1,15 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/result.h"
+
+namespace Service::Audio {
+
+constexpr ResultCode ERR_OPERATION_FAILED{ErrorModule::Audio, 2};
+constexpr ResultCode ERR_BUFFER_COUNT_EXCEEDED{ErrorModule::Audio, 8};
+constexpr ResultCode ERR_NOT_SUPPORTED{ErrorModule::Audio, 513};
+
+} // namespace Service::Audio

src/core/hle/service/audio/hwopus.cpp

@@ -0,0 +1,306 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <chrono>
+#include <cstring>
+#include <memory>
+#include <vector>
+
+#include <opus.h>
+#include <opus_multistream.h>
+
+#include "common/assert.h"
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/service/audio/hwopus.h"
+
+namespace Service::Audio {
+namespace {
+struct OpusDeleter {
+    void operator()(OpusMSDecoder* ptr) const {
+        opus_multistream_decoder_destroy(ptr);
+    }
+};
+
+using OpusDecoderPtr = std::unique_ptr<OpusMSDecoder, OpusDeleter>;
+
+struct OpusPacketHeader {
+    // Packet size in bytes.
+    u32_be size;
+    // Indicates the final range of the codec's entropy coder.
+    u32_be final_range;
+};
+static_assert(sizeof(OpusPacketHeader) == 0x8, "OpusHeader is an invalid size");
+
+class OpusDecoderState {
+public:
+    /// Describes extra behavior that may be asked of the decoding context.
+    enum class ExtraBehavior {
+        /// No extra behavior.
+        None,
+
+        /// Resets the decoder context back to a freshly initialized state.
+        ResetContext,
+    };
+
+    enum class PerfTime {
+        Disabled,
+        Enabled,
+    };
+
+    explicit OpusDecoderState(OpusDecoderPtr decoder, u32 sample_rate, u32 channel_count)
+        : decoder{std::move(decoder)}, sample_rate{sample_rate}, channel_count{channel_count} {}
+
+    // Decodes interleaved Opus packets. Optionally allows reporting time taken to
+    // perform the decoding, as well as any relevant extra behavior.
+    void DecodeInterleaved(Kernel::HLERequestContext& ctx, PerfTime perf_time,
+                           ExtraBehavior extra_behavior) {
+        if (perf_time == PerfTime::Disabled) {
+            DecodeInterleavedHelper(ctx, nullptr, extra_behavior);
+        } else {
+            u64 performance = 0;
+            DecodeInterleavedHelper(ctx, &performance, extra_behavior);
+        }
+    }
+
+private:
+    void DecodeInterleavedHelper(Kernel::HLERequestContext& ctx, u64* performance,
+                                 ExtraBehavior extra_behavior) {
+        u32 consumed = 0;
+        u32 sample_count = 0;
+        std::vector<opus_int16> samples(ctx.GetWriteBufferSize() / sizeof(opus_int16));
+
+        if (extra_behavior == ExtraBehavior::ResetContext) {
+            ResetDecoderContext();
+        }
+
+        if (!DecodeOpusData(consumed, sample_count, ctx.ReadBuffer(), samples, performance)) {
+            LOG_ERROR(Audio, "Failed to decode opus data");
+            IPC::ResponseBuilder rb{ctx, 2};
+            // TODO(ogniK): Use correct error code
+            rb.Push(RESULT_UNKNOWN);
+            return;
+        }
+
+        const u32 param_size = performance != nullptr ? 6 : 4;
+        IPC::ResponseBuilder rb{ctx, param_size};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push<u32>(consumed);
+        rb.Push<u32>(sample_count);
+        if (performance) {
+            rb.Push<u64>(*performance);
+        }
+        ctx.WriteBuffer(samples);
+    }
+
+    bool DecodeOpusData(u32& consumed, u32& sample_count, const std::vector<u8>& input,
+                        std::vector<opus_int16>& output, u64* out_performance_time) const {
+        const auto start_time = std::chrono::high_resolution_clock::now();
+        const std::size_t raw_output_sz = output.size() * sizeof(opus_int16);
+        if (sizeof(OpusPacketHeader) > input.size()) {
+            LOG_ERROR(Audio, "Input is smaller than the header size, header_sz={}, input_sz={}",
+                      sizeof(OpusPacketHeader), input.size());
+            return false;
+        }
+
+        OpusPacketHeader hdr{};
+        std::memcpy(&hdr, input.data(), sizeof(OpusPacketHeader));
+        if (sizeof(OpusPacketHeader) + static_cast<u32>(hdr.size) > input.size()) {
+            LOG_ERROR(Audio, "Input does not fit in the opus header size. data_sz={}, input_sz={}",
+                      sizeof(OpusPacketHeader) + static_cast<u32>(hdr.size), input.size());
+            return false;
+        }
+
+        const auto frame = input.data() + sizeof(OpusPacketHeader);
+        const auto decoded_sample_count = opus_packet_get_nb_samples(
+            frame, static_cast<opus_int32>(input.size() - sizeof(OpusPacketHeader)),
+            static_cast<opus_int32>(sample_rate));
+        if (decoded_sample_count * channel_count * sizeof(u16) > raw_output_sz) {
+            LOG_ERROR(
+                Audio,
+                "Decoded data does not fit into the output data, decoded_sz={}, raw_output_sz={}",
+                decoded_sample_count * channel_count * sizeof(u16), raw_output_sz);
+            return false;
+        }
+
+        const int frame_size = (static_cast<int>(raw_output_sz / sizeof(s16) / channel_count));
+        const auto out_sample_count =
+            opus_multistream_decode(decoder.get(), frame, hdr.size, output.data(), frame_size, 0);
+        if (out_sample_count < 0) {
+            LOG_ERROR(Audio,
+                      "Incorrect sample count received from opus_decode, "
+                      "output_sample_count={}, frame_size={}, data_sz_from_hdr={}",
+                      out_sample_count, frame_size, static_cast<u32>(hdr.size));
+            return false;
+        }
+
+        const auto end_time = std::chrono::high_resolution_clock::now() - start_time;
+        sample_count = out_sample_count;
+        consumed = static_cast<u32>(sizeof(OpusPacketHeader) + hdr.size);
+        if (out_performance_time != nullptr) {
+            *out_performance_time =
+                std::chrono::duration_cast<std::chrono::milliseconds>(end_time).count();
+        }
+
+        return true;
+    }
+
+    void ResetDecoderContext() {
+        ASSERT(decoder != nullptr);
+
+        opus_multistream_decoder_ctl(decoder.get(), OPUS_RESET_STATE);
+    }
+
+    OpusDecoderPtr decoder;
+    u32 sample_rate;
+    u32 channel_count;
+};
+
+class IHardwareOpusDecoderManager final : public ServiceFramework<IHardwareOpusDecoderManager> {
+public:
+    explicit IHardwareOpusDecoderManager(Core::System& system_, OpusDecoderState decoder_state)
+        : ServiceFramework{system_, "IHardwareOpusDecoderManager"}, decoder_state{
+                                                                        std::move(decoder_state)} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, &IHardwareOpusDecoderManager::DecodeInterleavedOld, "DecodeInterleavedOld"},
+            {1, nullptr, "SetContext"},
+            {2, nullptr, "DecodeInterleavedForMultiStreamOld"},
+            {3, nullptr, "SetContextForMultiStream"},
+            {4, &IHardwareOpusDecoderManager::DecodeInterleavedWithPerfOld, "DecodeInterleavedWithPerfOld"},
+            {5, nullptr, "DecodeInterleavedForMultiStreamWithPerfOld"},
+            {6, &IHardwareOpusDecoderManager::DecodeInterleaved, "DecodeInterleavedWithPerfAndResetOld"},
+            {7, nullptr, "DecodeInterleavedForMultiStreamWithPerfAndResetOld"},
+            {8, &IHardwareOpusDecoderManager::DecodeInterleaved, "DecodeInterleaved"},
+            {9, nullptr, "DecodeInterleavedForMultiStream"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+
+private:
+    void DecodeInterleavedOld(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Audio, "called");
+
+        decoder_state.DecodeInterleaved(ctx, OpusDecoderState::PerfTime::Disabled,
+                                        OpusDecoderState::ExtraBehavior::None);
+    }
+
+    void DecodeInterleavedWithPerfOld(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Audio, "called");
+
+        decoder_state.DecodeInterleaved(ctx, OpusDecoderState::PerfTime::Enabled,
+                                        OpusDecoderState::ExtraBehavior::None);
+    }
+
+    void DecodeInterleaved(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Audio, "called");
+
+        IPC::RequestParser rp{ctx};
+        const auto extra_behavior = rp.Pop<bool>() ? OpusDecoderState::ExtraBehavior::ResetContext
+                                                   : OpusDecoderState::ExtraBehavior::None;
+
+        decoder_state.DecodeInterleaved(ctx, OpusDecoderState::PerfTime::Enabled, extra_behavior);
+    }
+
+    OpusDecoderState decoder_state;
+};
+
+std::size_t WorkerBufferSize(u32 channel_count) {
+    ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
+    constexpr int num_streams = 1;
+    const int num_stereo_streams = channel_count == 2 ? 1 : 0;
+    return opus_multistream_decoder_get_size(num_streams, num_stereo_streams);
+}
+
+// Creates the mapping table that maps the input channels to the particular
+// output channels. In the stereo case, we map the left and right input channels
+// to the left and right output channels respectively.
+//
+// However, in the monophonic case, we only map the one available channel
+// to the sole output channel. We specify 255 for the would-be right channel
+// as this is a special value defined by Opus to indicate to the decoder to
+// ignore that channel.
+std::array<u8, 2> CreateMappingTable(u32 channel_count) {
+    if (channel_count == 2) {
+        return {{0, 1}};
+    }
+
+    return {{0, 255}};
+}
+} // Anonymous namespace
+
+void HwOpus::GetWorkBufferSize(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto sample_rate = rp.Pop<u32>();
+    const auto channel_count = rp.Pop<u32>();
+
+    LOG_DEBUG(Audio, "called with sample_rate={}, channel_count={}", sample_rate, channel_count);
+
+    ASSERT_MSG(sample_rate == 48000 || sample_rate == 24000 || sample_rate == 16000 ||
+                   sample_rate == 12000 || sample_rate == 8000,
+               "Invalid sample rate");
+    ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
+
+    const u32 worker_buffer_sz = static_cast<u32>(WorkerBufferSize(channel_count));
+    LOG_DEBUG(Audio, "worker_buffer_sz={}", worker_buffer_sz);
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(worker_buffer_sz);
+}
+
+void HwOpus::OpenOpusDecoder(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto sample_rate = rp.Pop<u32>();
+    const auto channel_count = rp.Pop<u32>();
+    const auto buffer_sz = rp.Pop<u32>();
+
+    LOG_DEBUG(Audio, "called sample_rate={}, channel_count={}, buffer_size={}", sample_rate,
+              channel_count, buffer_sz);
+
+    ASSERT_MSG(sample_rate == 48000 || sample_rate == 24000 || sample_rate == 16000 ||
+                   sample_rate == 12000 || sample_rate == 8000,
+               "Invalid sample rate");
+    ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
+
+    const std::size_t worker_sz = WorkerBufferSize(channel_count);
+    ASSERT_MSG(buffer_sz >= worker_sz, "Worker buffer too large");
+
+    const int num_stereo_streams = channel_count == 2 ? 1 : 0;
+    const auto mapping_table = CreateMappingTable(channel_count);
+
+    int error = 0;
+    OpusDecoderPtr decoder{
+        opus_multistream_decoder_create(sample_rate, static_cast<int>(channel_count), 1,
+                                        num_stereo_streams, mapping_table.data(), &error)};
+    if (error != OPUS_OK || decoder == nullptr) {
+        LOG_ERROR(Audio, "Failed to create Opus decoder (error={}).", error);
+        IPC::ResponseBuilder rb{ctx, 2};
+        // TODO(ogniK): Use correct error code
+        rb.Push(RESULT_UNKNOWN);
+        return;
+    }
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IHardwareOpusDecoderManager>(
+        system, OpusDecoderState{std::move(decoder), sample_rate, channel_count});
+}
+
+HwOpus::HwOpus(Core::System& system_) : ServiceFramework{system_, "hwopus"} {
+    static const FunctionInfo functions[] = {
+        {0, &HwOpus::OpenOpusDecoder, "OpenOpusDecoder"},
+        {1, &HwOpus::GetWorkBufferSize, "GetWorkBufferSize"},
+        {2, nullptr, "OpenOpusDecoderForMultiStream"},
+        {3, nullptr, "GetWorkBufferSizeForMultiStream"},
+    };
+    RegisterHandlers(functions);
+}
+
+HwOpus::~HwOpus() = default;
+
+} // namespace Service::Audio

src/core/hle/service/audio/hwopus.h

@@ -0,0 +1,25 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::Audio {
+
+class HwOpus final : public ServiceFramework<HwOpus> {
+public:
+    explicit HwOpus(Core::System& system_);
+    ~HwOpus() override;
+
+private:
+    void OpenOpusDecoder(Kernel::HLERequestContext& ctx);
+    void GetWorkBufferSize(Kernel::HLERequestContext& ctx);
+};
+
+} // namespace Service::Audio