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Diffstat (limited to 'include/asterisk/alaw.h')
-rwxr-xr-x | include/asterisk/alaw.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asterisk/alaw.h b/include/asterisk/alaw.h new file mode 100755 index 000000000..6861955bb --- /dev/null +++ b/include/asterisk/alaw.h @@ -0,0 +1,34 @@ +/* + * Asterisk -- A telephony toolkit for Linux. + * + * A-Law to Signed linear conversion + * + * Copyright (C) 1999, Mark Spencer + * + * Mark Spencer <markster@linux-support.net> + * + * This program is free software, distributed under the terms of + * the GNU General Public License + */ + +#ifndef _ASTERISK_ALAW_H +#define _ASTERISK_ALAW_H + +//! Init the ulaw conversion stuff +/*! + * To init the ulaw to slinear conversion stuff, this needs to be run. + */ +extern void ast_alaw_init(void); + +//! converts signed linear to mulaw +/*! + */ +extern unsigned char __ast_lin2a[8192]; + +//! help +extern short __ast_alaw[256]; + +#define AST_LIN2A(a) (__ast_lin2a[((unsigned short)(a)) >> 3]) +#define AST_ALAW(a) (__ast_alaw[(a)]) + +#endif |