#ifndef __G_711_H_ #define __G_711_H_ #include enum _e_g711_tp { TP_ALAW, //G711A TP_ULAW //G711U }; unsigned char linear2alaw(int pcm_val); /* 2's complement (16-bit range) */ int alaw2linear(unsigned char a_val); unsigned char linear2ulaw(int pcm_val); /* 2's complement (16-bit range) */ int ulaw2linear(unsigned char u_val); unsigned char alaw2ulaw(unsigned char aval); unsigned char ulaw2alaw(unsigned char uval); int g711_decode(void *pout_buf, int *pout_len, const void *pin_buf, const int in_len , int type); #endif