macros.h

一个关于 RTP的例子

/*******
 *
 * FILE INFO:
 * project:	RTP_lib
 * file:	Macros.h
 * started on:	03/26/03
 * started by:	Cedric Lacroix <[e-mail]>
 *
 *
 * TODO:
 *
 * BUGS:
 *
 * UPDATE INFO:
 * updated on:	05/13/03
 * updated by:	Cedric Lacroix <[e-mail]>
 *
 *******/


#ifndef MACROS_H
#define MACROS_H

#ifndef TRUE
#define     TRUE    1
#endif /* TRUE */

#ifndef FALSE
#define     FALSE   0
#endif /* FALSE */


/* Set flags version, padding, extention, csrc count, marker and payload type */

#define F_V_FLAGS(hd,v) 	do{(hd)&=0x3F; (hd)|=(((v) << 6)&0xC0);} while (0)
#define F_P_FLAGS(hd,v)		do{(hd)&=0xDF; (hd)|=(((v) << 5)&0x20);} while (0)
#define F_X_FLAGS(hd,v)		do{(hd)&=0xEF; (hd)|=(((v) << 4)&0x10);} while (0)
#define F_CC_FLAGS(hd,v) 	do{(hd)&=0xF0; (hd)|=((v)&0x0F);} while (0)
#define F_M_MKPT(hd,v)		do{(hd)&=0x7F; (hd)|=(((v) << 7)&0x80);} while (0)
#define F_PT_MKPT(hd,v) 	do{(hd)&=0x80; (hd)|=((v)&0x7F);} while (0)

#define MEM_TSALLOC(p,n,s)      do {((p)=calloc(n,s));}while(FALSE)
#define MEM_SALLOC(p,s)         MEM_TSALLOC(p,1,s)
#define MEM_TALLOC(p,n)         MEM_TSALLOC(p,n,sizeof *(p))
#define MEM_ALLOC(p)            MEM_TALLOC(p,1)

#define MEM_SZERO(p,s)          memset((p),0,s)
#define MEM_ZERO(p)             MEM_SZERO((p),sizeof *(p))

#define LS_ALLOC(p,t)           do {MEM_ALLOC(p);t##_INIT(p);}while(FALSE)
#define TAILQ_ALLOC(p)          LS_ALLOC(p,TAILQ)


#endif /* MACROS_H */