Add a public function for getting the codec version

If the codec library is loaded dynamically, it may be necessary that
the loaded library actually matches the version that was used when
it was built, to avoid issues due to ABI differences. Therefore add
a public function to allow getting the version of the currently
loaded library.

codec/api/svc/codec_api.h

@@ -531,6 +531,11 @@ long WelsCreateDecoder (ISVCDecoder** ppDecoder);
 */
 void WelsDestroyDecoder (ISVCDecoder* pDecoder);
 
+/** @brief   Get codec version
+ *  @return  The linked codec version
+*/
+OpenH264Version WelsGetCodecVersion ();
+
 #ifdef __cplusplus
 }
 #endif

codec/encoder/plus/src/welsEncoderExt.cpp

@@ -40,6 +40,7 @@
 #include "version.h"
 #include "crt_util_safe_x.h"	// Safe CRT routines like util for cross platforms
 #include "ref_list_mgr_svc.h"
+#include "codec_ver.h"
 
 #include <time.h>
 #include <measure_time.h>
@@ -1258,4 +1259,8 @@ void WelsDestroySVCEncoder (ISVCEncoder* pEncoder) {
     pSVCEncoder = NULL;
   }
 }
+
+OpenH264Version WelsGetCodecVersion () {
+  return g_stCodecVersion;
+}
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////

codec/encoder/plus/src/wels_enc_export.def

@@ -1,3 +1,4 @@
 EXPORTS
     WelsCreateSVCEncoder
-    WelsDestroySVCEncoder
+    WelsDestroySVCEncoder
+    WelsGetCodecVersion

openh264.def

@@ -3,3 +3,4 @@ EXPORTS
 	WelsDestroyDecoder
 	WelsCreateSVCEncoder
 	WelsDestroySVCEncoder
+	WelsGetCodecVersion