EAX various fixes (#657)

* [EAX] Fix effect GUID validation

Only NULL and REVERB was valid.

* [EAX] Fix default FX slot flags

EAX4 and EAX5 both sets to ENVIRONMENT.

* [EAX] Set default values for legacy FX slots in the initialization

* [EAX] Fix FX slot locking policy

Fail on attempt to load an effect or change a lock for EAX4 "set" call.
Unlock legacy FX slots on any EAX5 call.

* [EAX] Allow DEFER flag for "get" calls.

* [EAX] Make speaker configuration read-only

* [EAX] Initialize speaker configuration

* [EAX] Commit EAX source on a 3D source parameter call

Reference: EAX 4.0 Programmer's Guide

* [EAX] Commit EAX source on a 3D listener parameter call

Reference: EAX 4.0 Programmer's Guide

* [EAX] Commit source when it begins to play

Reference: EAX 4.0 Programmer's Guide

1 files changed, 10 insertions, 5 deletions

diff --git a/alc/context.h b/alc/context.h
index 331b21b0..682012c7 100644
--- a/alc/context.h
+++ b/alc/context.h
@@ -229,6 +229,8 @@ public:
 
     void eax_update_filters();
 
+    void eax_on_3d_listener_param_call();
+
 
     void eax_set_last_error() noexcept;
 
@@ -319,6 +321,7 @@ private:
 
     bool eax_is_initialized_{};
     bool eax_is_tried_{};
+    bool eax_are_legacy_fx_slots_unlocked_{};
 
     long eax_last_error_{};
     unsigned long eax_speaker_config_{};
@@ -365,12 +368,14 @@ private:
     void eax_ensure_compatibility();
 
 
+    unsigned long eax_detect_speaker_configuration() const;
+    void eax_update_speaker_configuration();
+
+
     void eax_initialize_filter_gain();
 
     void eax_set_last_error_defaults() noexcept;
 
-    void eax_set_speaker_config_defaults() noexcept;
-
     void eax_set_session_defaults() noexcept;
 
     void eax_set_context_defaults() noexcept;
@@ -380,6 +385,9 @@ private:
     void eax_initialize_sources();
 
 
+    void eax_unlock_legacy_fx_slots(const EaxEaxCall& eax_call) noexcept;
+
+
     void eax_dispatch_fx_slot(
         const EaxEaxCall& eax_call);
 
@@ -507,9 +515,6 @@ private:
     void eax_defer_hf_reference(
         const EaxEaxCall& eax_call);
 
-    void eax_set_speaker_config(
-        const EaxEaxCall& eax_call);
-
     void eax_set_session(
         const EaxEaxCall& eax_call);