Add function pointer typedef.

Switch to use /* */ comments to survive pickier compile flags.
Change destroy function to take ** pointer so it can set the pointer back to NULL
make code style consistent with the rest of the lib.






git-svn-id: http://svn.openzap.org/svn/openzap/trunk@202 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/freetdm/src/dsp/bell202.h

@@ -35,19 +35,22 @@
 #ifndef	__BELL202_H__
 #define	__BELL202_H__
 
+typedef void (*bytehandler_func_t) (void *, int);
+typedef void (*bithandler_func_t) (void *, int);
+
 typedef struct dsp_bell202_attr_s
 {
 	int					sample_rate;					// sample rate in HZ
-	void				(*bithandler) (void *, int);	// bit handler
+	bithandler_func_t	bithandler;						// bit handler
 	void				*bithandler_arg;				// arbitrary ID passed to bithandler as first argument
-	void				(*bytehandler) (void *, int);	// byte handler
+	bytehandler_func_t	bytehandler;					// byte handler
 	void				*bytehandler_arg;				// arbitrary ID passed to bytehandler as first argument
 }	dsp_bell202_attr_t;
 
 typedef struct
 {
 	dsp_bell202_attr_t	attr;							// attributes structure
-	double				*correlates [4];				// one for each of sin/cos for mark/space
+	double				*correlates[4];					// one for each of sin/cos for mark/space
 	int					corrsize;						// correlate size (also number of samples in ring buffer)
 	double				*buffer;						// sample ring buffer
 	int					ringstart;						// ring buffer start offset
@@ -69,19 +72,19 @@ typedef struct
  *		d) feed samples through the handler (dsp_bell202_sample)
 */
 
-extern	void					dsp_bell202_attr_init (dsp_bell202_attr_t *attributes);
+void					dsp_bell202_attr_init(dsp_bell202_attr_t *attributes);
 
-extern  void					(*dsp_bell202_attr_get_bithandler (dsp_bell202_attr_t *attributes, void **bithandler_arg)) (void *, int);
-extern	void					dsp_bell202_attr_set_bithandler (dsp_bell202_attr_t *attributes, void (*bithandler) (void *, int ), void *bithandler_arg);
-extern  void					(*dsp_bell202_attr_get_bytehandler (dsp_bell202_attr_t *attributes, void **bytehandler_arg)) (void *, int);
-extern	void					dsp_bell202_attr_set_bytehandler (dsp_bell202_attr_t *attributes, void (*bytehandler) (void *, int ), void *bytehandler_arg);
-extern	int						dsp_bell202_attr_get_samplerate (dsp_bell202_attr_t *attributes);
-extern	int						dsp_bell202_attr_set_samplerate (dsp_bell202_attr_t *attributes, int samplerate);
+bithandler_func_t		dsp_bell202_attr_get_bithandler(dsp_bell202_attr_t *attributes, void **bithandler_arg);
+void					dsp_bell202_attr_set_bithandler(dsp_bell202_attr_t *attributes, bithandler_func_t bithandler, void *bithandler_arg);
+bytehandler_func_t		dsp_bell202_attr_get_bytehandler(dsp_bell202_attr_t *attributes, void **bytehandler_arg);
+void					dsp_bell202_attr_set_bytehandler(dsp_bell202_attr_t *attributes, bytehandler_func_t bytehandler, void *bytehandler_arg);
+int						dsp_bell202_attr_get_samplerate(dsp_bell202_attr_t *attributes);
+int						dsp_bell202_attr_set_samplerate(dsp_bell202_attr_t *attributes, int samplerate);
 
-extern	dsp_bell202_handle_t *	dsp_bell202_create (dsp_bell202_attr_t *attributes);
-extern	void					dsp_bell202_destroy (dsp_bell202_handle_t *handle);
+dsp_bell202_handle_t *	dsp_bell202_create(dsp_bell202_attr_t *attributes);
+void					dsp_bell202_destroy(dsp_bell202_handle_t **handle);
 
-extern	void					dsp_bell202_sample (dsp_bell202_handle_t *handle, double normalized_sample);
+void					dsp_bell202_sample(dsp_bell202_handle_t *handle, double normalized_sample);
 
 #endif	// __BELL202_H__