-void *gsm_audio_create(void);
-void gsm_audio_destroy(void *arg);
-int gsm_audio_decode(void *arg, unsigned char *frame, signed short *samples);
-void gsm_audio_encode(void *arg, signed short *samples, unsigned char *frame);
+void *gsm_fr_create(void);
+void gsm_fr_destroy(void *arg);
+int gsm_fr_decode(void *arg, unsigned char *frame, signed short *samples);
+void gsm_fr_encode(void *arg, signed short *samples, unsigned char *frame);