1 files changed, 107 insertions, 0 deletions

diff --git a/src/audio_core/mix_context.h b/src/audio_core/mix_context.h
new file mode 100644
index 000000000..381566699
--- /dev/null
+++ b/src/audio_core/mix_context.h
@@ -0,0 +1,107 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <vector>
+#include "audio_core/common.h"
+#include "audio_core/splitter_context.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace AudioCore {
+class BehaviorInfo;
+
+class MixInfo {
+public:
+    struct DirtyHeader {
+        u32_le magic{};
+        u32_le mixer_count{};
+        INSERT_PADDING_BYTES(0x18);
+    };
+    static_assert(sizeof(DirtyHeader) == 0x20, "MixInfo::DirtyHeader is an invalid size");
+
+    struct InParams {
+        float_le volume{};
+        s32_le sample_rate{};
+        s32_le buffer_count{};
+        bool in_use{};
+        INSERT_PADDING_BYTES(3);
+        s32_le mix_id{};
+        s32_le effect_count{};
+        u32_le node_id{};
+        INSERT_PADDING_WORDS(2);
+        std::array<std::array<float_le, AudioCommon::MAX_MIX_BUFFERS>, AudioCommon::MAX_MIX_BUFFERS>
+            mix_volume{};
+        s32_le dest_mix_id{};
+        s32_le splitter_id{};
+        INSERT_PADDING_WORDS(1);
+    };
+    static_assert(sizeof(MixInfo::InParams) == 0x930, "MixInfo::InParams is an invalid size");
+};
+
+class ServerMixInfo {
+public:
+    struct InParams {
+        float volume{};
+        s32 sample_rate{};
+        s32 buffer_count{};
+        bool in_use{};
+        s32 mix_id{};
+        u32 node_id{};
+        std::array<std::array<float_le, AudioCommon::MAX_MIX_BUFFERS>, AudioCommon::MAX_MIX_BUFFERS>
+            mix_volume{};
+        s32 dest_mix_id{};
+        s32 splitter_id{};
+        s32 buffer_offset{};
+        s32 final_mix_distance{};
+    };
+    ServerMixInfo();
+    ~ServerMixInfo();
+
+    const ServerMixInfo::InParams& GetInParams() const;
+    ServerMixInfo::InParams& GetInParams();
+
+    bool Update(EdgeMatrix& edge_matrix, const MixInfo::InParams& mix_in,
+                BehaviorInfo& behavior_info, SplitterContext& splitter_context);
+    bool HasAnyConnection() const;
+    void Cleanup();
+
+private:
+    InParams in_params{};
+    bool UpdateConnection(EdgeMatrix& edge_matrix, const MixInfo::InParams& mix_in,
+                          SplitterContext& splitter_context);
+};
+
+class MixContext {
+public:
+    MixContext();
+    ~MixContext();
+
+    void Initialize(const BehaviorInfo& behavior_info, std::size_t mix_count);
+    void SortInfo();
+    bool TsortInfo(SplitterContext& splitter_context);
+
+    std::size_t GetCount() const;
+    ServerMixInfo& GetInfo(std::size_t i);
+    const ServerMixInfo& GetInfo(std::size_t i) const;
+    ServerMixInfo& GetSortedInfo(std::size_t i);
+    const ServerMixInfo& GetSortedInfo(std::size_t i) const;
+    ServerMixInfo& GetFinalMixInfo();
+    const ServerMixInfo& GetFinalMixInfo() const;
+    EdgeMatrix& GetEdgeMatrix();
+    const EdgeMatrix& GetEdgeMatrix() const;
+
+private:
+    void CalcMixBufferOffset();
+    void UpdateDistancesFromFinalMix();
+
+    NodeStates node_states{};
+    EdgeMatrix edge_matrix{};
+    std::size_t info_count{};
+    std::vector<ServerMixInfo> infos{};
+    std::vector<ServerMixInfo*> sorted_info{};
+};
+} // namespace AudioCore