Convert ALc.c to C++

Alc/filters/nfc.h

@@ -1,6 +1,10 @@
 #ifndef FILTER_NFC_H
 #define FILTER_NFC_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct NfcFilter1 {
     float base_gain, gain;
     float b1, a1;
@@ -46,4 +50,8 @@ void NfcFilterProcess2(NfcFilter *nfc, float *RESTRICT dst, const float *RESTRIC
 /* Near-field control filter for third-order ambisonic channels (9-15). */
 void NfcFilterProcess3(NfcFilter *nfc, float *RESTRICT dst, const float *RESTRICT src, const int count);
 
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
 #endif /* FILTER_NFC_H */

Alc/mastering.h

@@ -6,6 +6,10 @@
 /* For BUFFERSIZE. */
 #include "alMain.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct Compressor;
 
 /* The compressor is initialized with the following settings:
@@ -46,4 +50,8 @@ void ApplyCompression(struct Compressor *Comp, const ALsizei SamplesToDo,
 
 ALsizei GetCompressorLookAhead(const struct Compressor *Comp);
 
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
 #endif /* MASTERING_H */

CMakeLists.txt

@@ -839,7 +839,7 @@ SET(OPENAL_OBJS
     OpenAL32/sample_cvt.c
 )
 SET(ALC_OBJS
-    Alc/ALc.c
+    Alc/alc.cpp
     Alc/ALu.c
     Alc/alconfig.cpp
     Alc/alconfig.h