Add EAX extensions (EAX 2.0-5.0, X-RAM) (#632)

* Add EAX extensions (EAX 2.0-5.0, X-RAM)

* Comment out C++17 leftovers

* Remove everything related to patching

* Update alsoftrc.sample

* Rewrite integration

* Fix GCC compilation under Linux

* Always reset EAX effect properties when loading it into FX slot

1 files changed, 57 insertions, 0 deletions

diff --git a/al/effects/null.cpp b/al/effects/null.cpp
index 516446db..44595208 100644
--- a/al/effects/null.cpp
+++ b/al/effects/null.cpp
@@ -7,6 +7,10 @@
 #include "alc/effects/base.h"
 #include "effects.h"
 
+#if ALSOFT_EAX
+#include "al/eax_exception.h"
+#endif // ALSOFT_EAX
+
 
 namespace {
 
@@ -91,3 +95,56 @@ EffectProps genDefaultProps() noexcept
 DEFINE_ALEFFECT_VTABLE(Null);
 
 const EffectProps NullEffectProps{genDefaultProps()};
+
+
+#if ALSOFT_EAX
+namespace
+{
+
+
+class EaxNullEffect final :
+    public EaxEffect
+{
+public:
+    // [[nodiscard]]
+    bool dispatch(
+        const EaxEaxCall& eax_call) override;
+}; // EaxNullEffect
+
+
+class EaxNullEffectException :
+    public EaxException
+{
+public:
+    explicit EaxNullEffectException(
+        const char* message)
+        :
+        EaxException{"EAX_NULL_EFFECT", message}
+    {
+    }
+}; // EaxNullEffectException
+
+
+// [[nodiscard]]
+bool EaxNullEffect::dispatch(
+    const EaxEaxCall& eax_call)
+{
+    if (eax_call.get_property_id() != 0)
+    {
+        throw EaxNullEffectException{"Unsupported property id."};
+    }
+
+    return false;
+}
+
+
+} // namespace
+
+
+EaxEffectUPtr eax_create_eax_null_effect()
+{
+    return std::make_unique<EaxNullEffect>();
+}
+
+
+#endif // ALSOFT_EAX