1 files changed, 92 insertions, 0 deletions
diff --git a/al/eax/call.h b/al/eax/call.h
new file mode 100644
index 00000000..d491d6f9
--- /dev/null
+++ b/al/eax/call.h
@@ -0,0 +1,92 @@
+#ifndef EAX_EAX_CALL_INCLUDED
+#define EAX_EAX_CALL_INCLUDED
+
+#include "AL/al.h"
+#include "alspan.h"
+#include "api.h"
+#include "fx_slot_index.h"
+
+enum class EaxCallType {
+    none,
+    get,
+    set,
+}; // EaxCallType
+
+enum class EaxCallPropertySetId {
+    none,
+    context,
+    fx_slot,
+    source,
+    fx_slot_effect,
+}; // EaxCallPropertySetId
+
+class EaxCall {
+public:
+    EaxCall(
+        EaxCallType type,
+        const GUID& property_set_guid,
+        ALuint property_id,
+        ALuint property_source_id,
+        ALvoid* property_buffer,
+        ALuint property_size);
+
+    bool is_get() const noexcept { return type_ == EaxCallType::get; }
+    int get_version() const noexcept { return version_; }
+    EaxCallPropertySetId get_property_set_id() const noexcept { return property_set_id_; }
+    ALuint get_property_id() const noexcept { return property_id_; }
+    ALuint get_property_al_name() const noexcept { return property_source_id_; }
+    EaxFxSlotIndex get_fx_slot_index() const noexcept { return fx_slot_index_; }
+
+    template<typename TException, typename TValue>
+    TValue& get_value() const
+    {
+        if (property_size_ < static_cast<ALuint>(sizeof(TValue)))
+        {
+            fail_too_small();
+        }
+
+        return *static_cast<TValue*>(property_buffer_);
+    }
+
+    template<typename TException, typename TValue>
+    al::span<TValue> get_values() const
+    {
+        if (property_size_ < static_cast<ALuint>(sizeof(TValue)))
+        {
+            fail_too_small();
+        }
+
+        const auto count = property_size_ / sizeof(TValue);
+        return al::span<TValue>{static_cast<TValue*>(property_buffer_), count};
+    }
+
+    template<typename TException, typename TValue>
+    void set_value(const TValue& value) const
+    {
+        get_value<TException, TValue>() = value;
+    }
+
+private:
+    EaxCallType type_;
+    int version_;
+    EaxFxSlotIndex fx_slot_index_;
+    EaxCallPropertySetId property_set_id_;
+
+    ALuint property_id_;
+    ALuint property_source_id_;
+    ALvoid*property_buffer_;
+    ALuint property_size_;
+
+    [[noreturn]] static void fail(const char* message);
+    [[noreturn]] static void fail_too_small();
+}; // EaxCall
+
+EaxCall create_eax_call(
+    EaxCallType type,
+    const GUID* property_set_id,
+    ALuint property_id,
+    ALuint property_source_id,
+    ALvoid* property_buffer,
+    ALuint property_size);
+
+#endif // !EAX_EAX_CALL_INCLUDED