1 files changed, 135 insertions, 0 deletions
diff --git a/src/audio_core/renderer/effect/delay.h b/src/audio_core/renderer/effect/delay.h
new file mode 100644
index 000000000..accc42a06
--- /dev/null
+++ b/src/audio_core/renderer/effect/delay.h
@@ -0,0 +1,135 @@
+// 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 DelayInfo : public EffectInfoBase {
+public:
+    struct ParameterVersion1 {
+        /* 0x00 */ std::array<s8, MaxChannels> inputs;
+        /* 0x06 */ std::array<s8, MaxChannels> outputs;
+        /* 0x0C */ u16 channel_count_max;
+        /* 0x0E */ u16 channel_count;
+        /* 0x10 */ u32 delay_time_max;
+        /* 0x14 */ u32 delay_time;
+        /* 0x18 */ Common::FixedPoint<18, 14> sample_rate;
+        /* 0x1C */ Common::FixedPoint<18, 14> in_gain;
+        /* 0x20 */ Common::FixedPoint<18, 14> feedback_gain;
+        /* 0x24 */ Common::FixedPoint<18, 14> wet_gain;
+        /* 0x28 */ Common::FixedPoint<18, 14> dry_gain;
+        /* 0x2C */ Common::FixedPoint<18, 14> channel_spread;
+        /* 0x30 */ Common::FixedPoint<18, 14> lowpass_amount;
+        /* 0x34 */ ParameterState state;
+    };
+    static_assert(sizeof(ParameterVersion1) <= sizeof(EffectInfoBase::InParameterVersion1),
+                  "DelayInfo::ParameterVersion1 has the wrong size!");
+
+    struct ParameterVersion2 {
+        /* 0x00 */ std::array<s8, MaxChannels> inputs;
+        /* 0x06 */ std::array<s8, MaxChannels> outputs;
+        /* 0x0C */ s16 channel_count_max;
+        /* 0x0E */ s16 channel_count;
+        /* 0x10 */ s32 delay_time_max;
+        /* 0x14 */ s32 delay_time;
+        /* 0x18 */ s32 sample_rate;
+        /* 0x1C */ s32 in_gain;
+        /* 0x20 */ s32 feedback_gain;
+        /* 0x24 */ s32 wet_gain;
+        /* 0x28 */ s32 dry_gain;
+        /* 0x2C */ s32 channel_spread;
+        /* 0x30 */ s32 lowpass_amount;
+        /* 0x34 */ ParameterState state;
+    };
+    static_assert(sizeof(ParameterVersion2) <= sizeof(EffectInfoBase::InParameterVersion2),
+                  "DelayInfo::ParameterVersion2 has the wrong size!");
+
+    struct DelayLine {
+        Common::FixedPoint<50, 14> Read() const {
+            return buffer[buffer_pos];
+        }
+
+        void Write(const Common::FixedPoint<50, 14> value) {
+            buffer[buffer_pos] = value;
+            buffer_pos = static_cast<u32>((buffer_pos + 1) % buffer.size());
+        }
+
+        s32 sample_count_max{};
+        s32 sample_count{};
+        std::vector<Common::FixedPoint<50, 14>> buffer{};
+        u32 buffer_pos{};
+        Common::FixedPoint<18, 14> decay_rate{};
+    };
+
+    struct State {
+        /* 0x000 */ std::array<s32, 8> unk_000;
+        /* 0x020 */ std::array<DelayLine, MaxChannels> delay_lines;
+        /* 0x0B0 */ Common::FixedPoint<18, 14> feedback_gain;
+        /* 0x0B4 */ Common::FixedPoint<18, 14> delay_feedback_gain;
+        /* 0x0B8 */ Common::FixedPoint<18, 14> delay_feedback_cross_gain;
+        /* 0x0BC */ Common::FixedPoint<18, 14> lowpass_gain;
+        /* 0x0C0 */ Common::FixedPoint<18, 14> lowpass_feedback_gain;
+        /* 0x0C4 */ std::array<Common::FixedPoint<50, 14>, MaxChannels> lowpass_z;
+    };
+    static_assert(sizeof(State) <= sizeof(EffectInfoBase::State),
+                  "DelayInfo::State 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 result state. Version 2 only, unused.
+     *
+     * @param result_state - Result state to initialize.
+     */
+    void InitializeResultState(EffectResultState& result_state) override;
+
+    /**
+     * Update the host-side state with the ADSP-side state. Version 2 only, unused.
+     *
+     * @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