1 files changed, 138 insertions, 0 deletions
diff --git a/src/audio_core/renderer/effect/light_limiter.h b/src/audio_core/renderer/effect/light_limiter.h
new file mode 100644
index 000000000..338d67bbc
--- /dev/null
+++ b/src/audio_core/renderer/effect/light_limiter.h
@@ -0,0 +1,138 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+#include <vector>
+
+#include "audio_core/common/common.h"
+#include "audio_core/renderer/effect/effect_info_base.h"
+#include "common/common_types.h"
+#include "common/fixed_point.h"
+
+namespace AudioCore::AudioRenderer {
+
+class LightLimiterInfo : public EffectInfoBase {
+public:
+    enum class ProcessingMode {
+        Mode0,
+        Mode1,
+    };
+
+    struct ParameterVersion1 {
+        /* 0x00 */ std::array<s8, MaxChannels> inputs;
+        /* 0x06 */ std::array<s8, MaxChannels> outputs;
+        /* 0x0C */ u16 channel_count_max;
+        /* 0x0E */ u16 channel_count;
+        /* 0x0C */ u32 sample_rate;
+        /* 0x14 */ s32 look_ahead_time_max;
+        /* 0x18 */ s32 attack_time;
+        /* 0x1C */ s32 release_time;
+        /* 0x20 */ s32 look_ahead_time;
+        /* 0x24 */ f32 attack_coeff;
+        /* 0x28 */ f32 release_coeff;
+        /* 0x2C */ f32 threshold;
+        /* 0x30 */ f32 input_gain;
+        /* 0x34 */ f32 output_gain;
+        /* 0x38 */ s32 look_ahead_samples_min;
+        /* 0x3C */ s32 look_ahead_samples_max;
+        /* 0x40 */ ParameterState state;
+        /* 0x41 */ bool statistics_enabled;
+        /* 0x42 */ bool statistics_reset_required;
+        /* 0x43 */ ProcessingMode processing_mode;
+    };
+    static_assert(sizeof(ParameterVersion1) <= sizeof(EffectInfoBase::InParameterVersion1),
+                  "LightLimiterInfo::ParameterVersion1 has the wrong size!");
+
+    struct ParameterVersion2 {
+        /* 0x00 */ std::array<s8, MaxChannels> inputs;
+        /* 0x06 */ std::array<s8, MaxChannels> outputs;
+        /* 0x0C */ u16 channel_count_max;
+        /* 0x0E */ u16 channel_count;
+        /* 0x0C */ u32 sample_rate;
+        /* 0x14 */ s32 look_ahead_time_max;
+        /* 0x18 */ s32 attack_time;
+        /* 0x1C */ s32 release_time;
+        /* 0x20 */ s32 look_ahead_time;
+        /* 0x24 */ f32 attack_coeff;
+        /* 0x28 */ f32 release_coeff;
+        /* 0x2C */ f32 threshold;
+        /* 0x30 */ f32 input_gain;
+        /* 0x34 */ f32 output_gain;
+        /* 0x38 */ s32 look_ahead_samples_min;
+        /* 0x3C */ s32 look_ahead_samples_max;
+        /* 0x40 */ ParameterState state;
+        /* 0x41 */ bool statistics_enabled;
+        /* 0x42 */ bool statistics_reset_required;
+        /* 0x43 */ ProcessingMode processing_mode;
+    };
+    static_assert(sizeof(ParameterVersion2) <= sizeof(EffectInfoBase::InParameterVersion2),
+                  "LightLimiterInfo::ParameterVersion2 has the wrong size!");
+
+    struct State {
+        std::array<Common::FixedPoint<49, 15>, MaxChannels> samples_average;
+        std::array<Common::FixedPoint<49, 15>, MaxChannels> compression_gain;
+        std::array<s32, MaxChannels> look_ahead_sample_offsets;
+        std::array<std::vector<Common::FixedPoint<49, 15>>, MaxChannels> look_ahead_sample_buffers;
+    };
+    static_assert(sizeof(State) <= sizeof(EffectInfoBase::State),
+                  "LightLimiterInfo::State has the wrong size!");
+
+    struct StatisticsInternal {
+        /* 0x00 */ std::array<f32, MaxChannels> channel_max_sample;
+        /* 0x18 */ std::array<f32, MaxChannels> channel_compression_gain_min;
+    };
+    static_assert(sizeof(StatisticsInternal) == 0x30,
+                  "LightLimiterInfo::StatisticsInternal has the wrong size!");
+
+    /**
+     * Update the info with new parameters, version 1.
+     *
+     * @param error_info  - Used to write call result code.
+     * @param in_params   - New parameters to update the info with.
+     * @param pool_mapper - Pool for mapping buffers.
+     */
+    void Update(BehaviorInfo::ErrorInfo& error_info, const InParameterVersion1& in_params,
+                const PoolMapper& pool_mapper) override;
+
+    /**
+     * Update the info with new parameters, version 2.
+     *
+     * @param error_info  - Used to write call result code.
+     * @param in_params   - New parameters to update the info with.
+     * @param pool_mapper - Pool for mapping buffers.
+     */
+    void Update(BehaviorInfo::ErrorInfo& error_info, const InParameterVersion2& in_params,
+                const PoolMapper& pool_mapper) override;
+
+    /**
+     * Update the info after command generation. Usually only changes its state.
+     */
+    void UpdateForCommandGeneration() override;
+
+    /**
+     * Initialize a new limiter statistics result state. Version 2 only.
+     *
+     * @param result_state - Result state to initialize.
+     */
+    void InitializeResultState(EffectResultState& result_state) override;
+
+    /**
+     * Update the host-side limiter statistics with the ADSP-side one. Version 2 only.
+     *
+     * @param cpu_state - Host-side result state to update.
+     * @param dsp_state - AudioRenderer-side result state to update from.
+     */
+    void UpdateResultState(EffectResultState& cpu_state, EffectResultState& dsp_state) override;
+
+    /**
+     * Get a workbuffer assigned to this effect with the given index.
+     *
+     * @param index - Workbuffer index.
+     * @return Address of the buffer.
+     */
+    CpuAddr GetWorkbuffer(s32 index) override;
+};
+
+} // namespace AudioCore::AudioRenderer