Add getter functions for backend vtables.

extras/decoders/libopus/miniaudio_libopus.c

@@ -555,4 +555,9 @@ ma_decoding_backend_vtable* ma_decoding_backend_libopus = &ma_gDecodingBackendVT
 ma_decoding_backend_vtable* ma_decoding_backend_libopus = NULL;
 #endif
 
+MA_API ma_decoding_backend_vtable* ma_libopus_get_vtable(void)
+{
+    return ma_decoding_backend_libopus;
+}
+
 #endif  /* miniaudio_libopus_c */

extras/decoders/libopus/miniaudio_libopus.h

@@ -35,6 +35,7 @@ MA_API ma_result ma_libopus_get_length_in_pcm_frames(ma_libopus* pOpus, ma_uint6
 
 /* Decoding backend vtable. This is what you'll plug into ma_decoder_config.pBackendVTables. No user data required. */
 extern ma_decoding_backend_vtable* ma_decoding_backend_libopus;
+MA_API ma_decoding_backend_vtable* ma_libopus_get_vtable(void);
 
 #ifdef __cplusplus
 }

extras/decoders/libvorbis/miniaudio_libvorbis.c

@@ -609,4 +609,9 @@ ma_decoding_backend_vtable* ma_decoding_backend_libvorbis = &ma_gDecodingBackend
 ma_decoding_backend_vtable* ma_decoding_backend_libvorbis = NULL;
 #endif
 
+MA_API ma_decoding_backend_vtable* ma_libvorbis_get_vtable(void)
+{
+    return ma_decoding_backend_libvorbis;
+}
+
 #endif /* miniaudio_libvorbis_c */

extras/decoders/libvorbis/miniaudio_libvorbis.h

@@ -35,6 +35,7 @@ MA_API ma_result ma_libvorbis_get_length_in_pcm_frames(ma_libvorbis* pVorbis, ma
 
 /* Decoding backend vtable. This is what you'll plug into ma_decoder_config.pBackendVTables. No user data required. */
 extern ma_decoding_backend_vtable* ma_decoding_backend_libvorbis;
+MA_API ma_decoding_backend_vtable* ma_libvorbis_get_vtable(void);
 
 #ifdef __cplusplus
 }