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, 42 insertions, 0 deletions

diff --git a/al/state.cpp b/al/state.cpp
index 10c7bc74..0ec0e280 100644
--- a/al/state.cpp
+++ b/al/state.cpp
@@ -46,6 +46,13 @@
 #include "opthelpers.h"
 #include "strutils.h"
 
+#if ALSOFT_EAX
+#include "alc/device.h"
+
+#include "eax_globals.h"
+#include "eax_x_ram.h"
+#endif // ALSOFT_EAX
+
 
 namespace {
 
@@ -427,6 +434,41 @@ START_API_FUNC
         value = static_cast<int>(ResamplerDefault);
         break;
 
+#if ALSOFT_EAX
+
+#define EAX_ERROR "[alGetInteger] EAX not enabled."
+
+    case AL_EAX_RAM_SIZE:
+        if (eax_g_is_enabled)
+        {
+            value = eax_x_ram_max_size;
+        }
+        else
+        {
+            context->setError(AL_INVALID_VALUE, EAX_ERROR);
+        }
+
+        break;
+
+    case AL_EAX_RAM_FREE:
+        if (eax_g_is_enabled)
+        {
+            auto device = context->mALDevice.get();
+            std::lock_guard<std::mutex> device_lock{device->BufferLock};
+
+            value = device->eax_x_ram_free_size;
+        }
+        else
+        {
+            context->setError(AL_INVALID_VALUE, EAX_ERROR);
+        }
+
+        break;
+
+#undef EAX_ERROR
+
+#endif // ALSOFT_EAX
+
     default:
         context->setError(AL_INVALID_VALUE, "Invalid integer property 0x%04x", pname);
     }