/* $Log: lpcenc.c,v $ Revision 1.1.1.1 2001/11/19 19:50:15 smorlat First cvs. Revision 1.1.1.1 2001/08/08 21:29:08 simon First import * Revision 1.2 1996/08/20 20:31:21 jaf * Removed all static local variables that were SAVE'd in the Fortran * code, and put them in struct lpc10_encoder_state that is passed as an * argument. * * Removed init function, since all initialization is now done in * init_lpc10_encoder_state(). * * Changed name of function from lpcenc_ to lpc10_encode, simply to make * all lpc10 functions have more consistent naming with each other. * * Revision 1.1 1996/08/19 22:31:44 jaf * Initial revision * */ #ifdef P_R_O_T_O_T_Y_P_E_S extern int lpcenc_(real *speech, integer *bits); extern int initlpcenc_(void); /*:ref: prepro_ 14 2 6 4 */ /*:ref: analys_ 14 5 6 4 4 6 6 */ /*:ref: encode_ 14 7 4 4 6 6 4 4 4 */ /*:ref: chanwr_ 14 5 4 4 4 4 4 */ /*:ref: initprepro_ 14 0 */ /*:ref: initanalys_ 14 0 */ #endif /* -- translated by f2c (version 19951025). You must link the resulting object file with the libraries: -lf2c -lm (in that order) */ #include "f2c.h" /* Table of constant values */ static integer c__180 = 180; static integer c__10 = 10; /* ***************************************************************** */ /* $Log: lpcenc.c,v $ /* Revision 1.1.1.1 2001/11/19 19:50:15 smorlat /* First cvs. /* /* Revision 1.1.1.1 2001/08/08 21:29:08 simon /* First import /* * Revision 1.2 1996/08/20 20:31:21 jaf * Removed all static local variables that were SAVE'd in the Fortran * code, and put them in struct lpc10_encoder_state that is passed as an * argument. * * Removed init function, since all initialization is now done in * init_lpc10_encoder_state(). * * Changed name of function from lpcenc_ to lpc10_encode, simply to make * all lpc10 functions have more consistent naming with each other. * * Revision 1.1 1996/08/19 22:31:44 jaf * Initial revision * */ /* Revision 1.2 1996/03/28 00:01:22 jaf */ /* Commented out some trace statements. */ /* Revision 1.1 1996/03/28 00:00:27 jaf */ /* Initial revision */ /* ***************************************************************** */ /* Encode one frame of 180 speech samples to 54 bits. */ /* Input: */ /* SPEECH - Speech encoded as real values in the range [-1,+1]. */ /* Indices 1 through 180 read, and modified (by PREPRO). */ /* Output: */ /* BITS - 54 encoded bits, stored 1 per array element. */ /* Indices 1 through 54 written. */ /* This subroutine maintains local state from one call to the next. If */ /* you want to switch to using a new audio stream for this filter, or */ /* reinitialize its state for any other reason, call the ENTRY */ /* INITLPCENC. */ /* Subroutine */ int lpc10_encode(real *speech, integer *bits, struct lpc10_encoder_state *st) { integer irms, voice[2], pitch, ipitv; real rc[10]; extern /* Subroutine */ int encode_(integer *, integer *, real *, real *, integer *, integer *, integer *), chanwr_(integer *, integer *, integer *, integer *, integer *, struct lpc10_encoder_state *), analys_(real *, integer *, integer *, real *, real *, struct lpc10_encoder_state *), prepro_(real *, integer *, struct lpc10_encoder_state *); integer irc[10]; real rms; /* Arguments */ /* $Log: lpcenc.c,v $ /* Revision 1.1.1.1 2001/11/19 19:50:15 smorlat /* First cvs. /* /* Revision 1.1.1.1 2001/08/08 21:29:08 simon /* First import /* * Revision 1.2 1996/08/20 20:31:21 jaf * Removed all static local variables that were SAVE'd in the Fortran * code, and put them in struct lpc10_encoder_state that is passed as an * argument. * * Removed init function, since all initialization is now done in * init_lpc10_encoder_state(). * * Changed name of function from lpcenc_ to lpc10_encode, simply to make * all lpc10 functions have more consistent naming with each other. * * Revision 1.1 1996/08/19 22:31:44 jaf * Initial revision * */ /* Revision 1.3 1996/03/29 22:03:47 jaf */ /* Removed definitions for any constants that were no longer used. */ /* Revision 1.2 1996/03/26 19:34:33 jaf */ /* Added comments indicating which constants are not needed in an */ /* application that uses the LPC-10 coder. */ /* Revision 1.1 1996/02/07 14:43:51 jaf */ /* Initial revision */ /* LPC Configuration parameters: */ /* Frame size, Prediction order, Pitch period */ /* Local variables that need not be saved */ /* Uncoded speech parameters */ /* Coded speech parameters */ /* Local state */ /* None */ /* Parameter adjustments */ if (speech) { --speech; } if (bits) { --bits; } /* Function Body */ prepro_(&speech[1], &c__180, st); analys_(&speech[1], voice, &pitch, &rms, rc, st); encode_(voice, &pitch, &rms, rc, &ipitv, &irms, irc); chanwr_(&c__10, &ipitv, &irms, irc, &bits[1], st); return 0; } /* lpcenc_ */
