1 files changed, 135 insertions, 0 deletions
diff --git a/src/audio_core/renderer/splitter/splitter_destinations_data.h b/src/audio_core/renderer/splitter/splitter_destinations_data.h
new file mode 100644
index 000000000..bd3d55748
--- /dev/null
+++ b/src/audio_core/renderer/splitter/splitter_destinations_data.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 <span>
+
+#include "audio_core/common/common.h"
+#include "common/common_types.h"
+
+namespace AudioCore::AudioRenderer {
+/**
+ * Represents a mixing node, can be connected to a previous and next destination forming a chain
+ * that a certain mix buffer will pass through to output.
+ */
+class SplitterDestinationData {
+public:
+    struct InParameter {
+        /* 0x00 */ u32 magic; // 'SNDD'
+        /* 0x04 */ s32 id;
+        /* 0x08 */ std::array<f32, MaxMixBuffers> mix_volumes;
+        /* 0x68 */ u32 mix_id;
+        /* 0x6C */ bool in_use;
+    };
+    static_assert(sizeof(InParameter) == 0x70,
+                  "SplitterDestinationData::InParameter has the wrong size!");
+
+    SplitterDestinationData(s32 id);
+
+    /**
+     * Reset the mix volumes for this destination.
+     */
+    void ClearMixVolume();
+
+    /**
+     * Get the id of this destination.
+     *
+     * @return Id for this destination.
+     */
+    s32 GetId() const;
+
+    /**
+     * Check if this destination is correctly configured.
+     *
+     * @return True if configured, otherwise false.
+     */
+    bool IsConfigured() const;
+
+    /**
+     * Get the mix id for this destination.
+     *
+     * @return Mix id for this destination.
+     */
+    s32 GetMixId() const;
+
+    /**
+     * Get the current mix volume of a given index in this destination.
+     *
+     * @param index - Mix buffer index to get the volume for.
+     * @return Current volume of the specified mix.
+     */
+    f32 GetMixVolume(u32 index) const;
+
+    /**
+     * Get the current mix volumes for all mix buffers in this destination.
+     *
+     * @return Span of current mix buffer volumes.
+     */
+    std::span<f32> GetMixVolume();
+
+    /**
+     * Get the previous mix volume of a given index in this destination.
+     *
+     * @param index - Mix buffer index to get the volume for.
+     * @return Previous volume of the specified mix.
+     */
+    f32 GetMixVolumePrev(u32 index) const;
+
+    /**
+     * Get the previous mix volumes for all mix buffers in this destination.
+     *
+     * @return Span of previous mix buffer volumes.
+     */
+    std::span<f32> GetMixVolumePrev();
+
+    /**
+     * Update this destination.
+     *
+     * @param params - Inpout parameters to update the destination.
+     */
+    void Update(const InParameter& params);
+
+    /**
+     * Mark this destination as needing its volumes updated.
+     */
+    void MarkAsNeedToUpdateInternalState();
+
+    /**
+     * Copy current volumes to previous if an update is required.
+     */
+    void UpdateInternalState();
+
+    /**
+     * Get the next destination in the mix chain.
+     *
+     * @return The next splitter destination, may be nullptr if this is the last in the chain.
+     */
+    SplitterDestinationData* GetNext() const;
+
+    /**
+     * Set the next destination in the mix chain.
+     *
+     * @param next - Destination this one is to be connected to.
+     */
+    void SetNext(SplitterDestinationData* next);
+
+private:
+    /// Id of this destination
+    const s32 id;
+    /// Mix id this destination represents
+    s32 destination_id{UnusedMixId};
+    /// Current mix volumes
+    std::array<f32, MaxMixBuffers> mix_volumes{0.0f};
+    /// Previous mix volumes
+    std::array<f32, MaxMixBuffers> prev_mix_volumes{0.0f};
+    /// Next destination in the mix chain
+    SplitterDestinationData* next{};
+    /// Is this destiantion in use?
+    bool in_use{};
+    /// Does this destiantion need its volumes updated?
+    bool need_update{};
+};
+
+} // namespace AudioCore::AudioRenderer