?? audbri_g711.h
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#ident "@(#)audbri_g711.h 1.1 92/07/30 SMI"/* * Derived from: * #ident "@(#)audio_encode.h 1.1 92/02/14 SMI" *//* Copyright (c) 1992 by Sun Microsystems, Inc. *//* * u-law, A-law and linear PCM conversion tables and macros. *//* PCM linear <-> a-law conversion tables */extern short _alaw2linear[]; /* 8-bit a-law to 16-bit PCM */extern unsigned char *_linear2alaw; /* 13-bit PCM to 8-bit a-law *//* PCM linear <-> u-law conversion tables */extern short _ulaw2linear[]; /* 8-bit u-law to 16-bit PCM */extern unsigned char *_linear2ulaw; /* 14-bit PCM to 8-bit u-law *//* A-law <-> u-law conversion tables */extern unsigned char _alaw2ulaw[]; /* 8-bit A-law to 8-bit u-law */extern unsigned char _ulaw2alaw[]; /* 8-bit u-law to 8-bit A-law *//* PCM linear <-> a-law conversion macros *//* a-law to 8,16,32-bit linear */#define audio_a2c(X) ((char)(_alaw2linear[(unsigned char) (X)] >> 8))#define audio_a2s(X) (_alaw2linear[(unsigned char) (X)])#define audio_a2l(X) (((long)_alaw2linear[(unsigned char) (X)]) << 16)/* 8,16,32-bit linear to a-law */#define audio_c2a(X) (_linear2alaw[((short)(X)) << 5])#define audio_s2a(X) (_linear2alaw[((short)(X)) >> 3])#define audio_l2a(X) (_linear2alaw[((long)(X)) >> 19])/* PCM linear <-> u-law conversion macros *//* u-law to 8,16,32-bit linear */#define audio_u2c(X) ((char)(_ulaw2linear[(unsigned char) (X)] >> 8))#define audio_u2s(X) (_ulaw2linear[(unsigned char) (X)])#define audio_u2l(X) (((long)_ulaw2linear[(unsigned char) (X)]) << 16)/* 8,16,32-bit linear to u-law */#define audio_c2u(X) (_linear2ulaw[((short)(X)) << 6])#define audio_s2u(X) (_linear2ulaw[((short)(X)) >> 2])#define audio_l2u(X) (_linear2ulaw[((long)(X)) >> 18])/* A-law <-> u-law conversion macros */#define audio_a2u(X) (_alaw2ulaw[(unsigned char)(X)])#define audio_u2a(X) (_ulaw2alaw[(unsigned char)(X)])?? 快捷鍵說明
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