1 files changed, 91 insertions, 0 deletions
diff --git a/src/core/hle/service/am/audio_controller.cpp b/src/core/hle/service/am/audio_controller.cpp
new file mode 100644
index 000000000..ae75db174
--- /dev/null
+++ b/src/core/hle/service/am/audio_controller.cpp
@@ -0,0 +1,91 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/service/am/audio_controller.h"
+#include "core/hle/service/ipc_helpers.h"
+
+namespace Service::AM {
+
+IAudioController::IAudioController(Core::System& system_)
+    : ServiceFramework{system_, "IAudioController"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, &IAudioController::SetExpectedMasterVolume, "SetExpectedMasterVolume"},
+        {1, &IAudioController::GetMainAppletExpectedMasterVolume, "GetMainAppletExpectedMasterVolume"},
+        {2, &IAudioController::GetLibraryAppletExpectedMasterVolume, "GetLibraryAppletExpectedMasterVolume"},
+        {3, &IAudioController::ChangeMainAppletMasterVolume, "ChangeMainAppletMasterVolume"},
+        {4, &IAudioController::SetTransparentAudioRate, "SetTransparentVolumeRate"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+IAudioController::~IAudioController() = default;
+
+void IAudioController::SetExpectedMasterVolume(HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const float main_applet_volume_tmp = rp.Pop<float>();
+    const float library_applet_volume_tmp = rp.Pop<float>();
+
+    LOG_DEBUG(Service_AM, "called. main_applet_volume={}, library_applet_volume={}",
+              main_applet_volume_tmp, library_applet_volume_tmp);
+
+    // Ensure the volume values remain within the 0-100% range
+    main_applet_volume = std::clamp(main_applet_volume_tmp, min_allowed_volume, max_allowed_volume);
+    library_applet_volume =
+        std::clamp(library_applet_volume_tmp, min_allowed_volume, max_allowed_volume);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
+void IAudioController::GetMainAppletExpectedMasterVolume(HLERequestContext& ctx) {
+    LOG_DEBUG(Service_AM, "called. main_applet_volume={}", main_applet_volume);
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(ResultSuccess);
+    rb.Push(main_applet_volume);
+}
+
+void IAudioController::GetLibraryAppletExpectedMasterVolume(HLERequestContext& ctx) {
+    LOG_DEBUG(Service_AM, "called. library_applet_volume={}", library_applet_volume);
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(ResultSuccess);
+    rb.Push(library_applet_volume);
+}
+
+void IAudioController::ChangeMainAppletMasterVolume(HLERequestContext& ctx) {
+    struct Parameters {
+        float volume;
+        s64 fade_time_ns;
+    };
+    static_assert(sizeof(Parameters) == 16);
+
+    IPC::RequestParser rp{ctx};
+    const auto parameters = rp.PopRaw<Parameters>();
+
+    LOG_DEBUG(Service_AM, "called. volume={}, fade_time_ns={}", parameters.volume,
+              parameters.fade_time_ns);
+
+    main_applet_volume = std::clamp(parameters.volume, min_allowed_volume, max_allowed_volume);
+    fade_time_ns = std::chrono::nanoseconds{parameters.fade_time_ns};
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
+void IAudioController::SetTransparentAudioRate(HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const float transparent_volume_rate_tmp = rp.Pop<float>();
+
+    LOG_DEBUG(Service_AM, "called. transparent_volume_rate={}", transparent_volume_rate_tmp);
+
+    // Clamp volume range to 0-100%.
+    transparent_volume_rate =
+        std::clamp(transparent_volume_rate_tmp, min_allowed_volume, max_allowed_volume);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+}
+
+} // namespace Service::AM