alaw.h File Reference

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Defines
#define	AST_LIN2A(a)   (__ast_lin2a[((unsigned short)(a)) >> 3])
#define	AST_ALAW(a)   (__ast_alaw[(a)])
Functions
void	ast_alaw_init (void)
	Init the ulaw conversion stuff.
Variables
unsigned char	__ast_lin2a [8192]
	converts signed linear to mulaw
short	__ast_alaw [256]
	help

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Define Documentation

#define AST_ALAW (  a   )     (__ast_alaw[(a)])

Definition at line 32 of file alaw.h. Referenced by ast_dsp_process().

#define AST_LIN2A (  a   )     (__ast_lin2a[((unsigned short)(a)) >> 3])

Definition at line 31 of file alaw.h.

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Function Documentation

void ast_alaw_init (  void   )

Init the ulaw conversion stuff. To init the ulaw to slinear conversion stuff, this needs to be run. Definition at line 68 of file alaw.c. References __ast_alaw, and __ast_lin2a. Referenced by main(). { int i; /* * Set up mu-law conversion table */ for(i = 0;i < 256;i++) { __ast_alaw[i] = alaw2linear(i); } /* set up the reverse (mu-law) conversion table */ for(i = -32768; i < 32768; i++) { __ast_lin2a[((unsigned short)i) >> 3] = linear2alaw(i); } }

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Variable Documentation

short __ast_alaw[256]

help Definition at line 29 of file alaw.h. Referenced by ast_alaw_init().

unsigned char __ast_lin2a[8192]

converts signed linear to mulaw Definition at line 26 of file alaw.h. Referenced by ast_alaw_init().

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