1 files changed, 79 insertions, 0 deletions

diff --git a/src/audio_core/renderer/effect/biquad_filter.h b/src/audio_core/renderer/effect/biquad_filter.h
new file mode 100644
index 000000000..f53fd5bab
--- /dev/null
+++ b/src/audio_core/renderer/effect/biquad_filter.h
@@ -0,0 +1,79 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "audio_core/common/common.h"
+#include "audio_core/renderer/effect/effect_info_base.h"
+#include "common/common_types.h"
+
+namespace AudioCore::AudioRenderer {
+
+class BiquadFilterInfo : public EffectInfoBase {
+public:
+    struct ParameterVersion1 {
+        /* 0x00 */ std::array<s8, MaxChannels> inputs;
+        /* 0x06 */ std::array<s8, MaxChannels> outputs;
+        /* 0x0C */ std::array<s16, 3> b;
+        /* 0x12 */ std::array<s16, 2> a;
+        /* 0x16 */ s8 channel_count;
+        /* 0x17 */ ParameterState state;
+    };
+    static_assert(sizeof(ParameterVersion1) <= sizeof(EffectInfoBase::InParameterVersion1),
+                  "BiquadFilterInfo::ParameterVersion1 has the wrong size!");
+
+    struct ParameterVersion2 {
+        /* 0x00 */ std::array<s8, MaxChannels> inputs;
+        /* 0x06 */ std::array<s8, MaxChannels> outputs;
+        /* 0x0C */ std::array<s16, 3> b;
+        /* 0x12 */ std::array<s16, 2> a;
+        /* 0x16 */ s8 channel_count;
+        /* 0x17 */ ParameterState state;
+    };
+    static_assert(sizeof(ParameterVersion2) <= sizeof(EffectInfoBase::InParameterVersion2),
+                  "BiquadFilterInfo::ParameterVersion2 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;
+};
+
+} // namespace AudioCore::AudioRenderer