182 lines
5.5 KiB
C
182 lines
5.5 KiB
C
/*
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$Log$
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Revision 1.15 2004/06/26 03:50:14 markster
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Merge source cleanups (bug #1911)
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Revision 1.14 2003/02/12 13:59:15 matteo
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mer feb 12 14:56:57 CET 2003
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Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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mer feb 12 14:56:57 CET 2003
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Revision 1.2 2000/01/05 08:20:39 markster
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Some OSS fixes and a few lpc changes to make it actually work
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* Revision 1.2 1996/08/20 20:31:21 jaf
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* Removed all static local variables that were SAVE'd in the Fortran
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* code, and put them in struct lpc10_encoder_state that is passed as an
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* argument.
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*
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* Removed init function, since all initialization is now done in
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* init_lpc10_encoder_state().
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*
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* Changed name of function from lpcenc_ to lpc10_encode, simply to make
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* all lpc10 functions have more consistent naming with each other.
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*
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* Revision 1.1 1996/08/19 22:31:44 jaf
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* Initial revision
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*
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*/
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/* -- translated by f2c (version 19951025).
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You must link the resulting object file with the libraries:
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-lf2c -lm (in that order)
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*/
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#include "f2c.h"
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#ifdef P_R_O_T_O_T_Y_P_E_S
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extern int lpcenc_(real *speech, integer *bits);
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extern int initlpcenc_(void);
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/*:ref: prepro_ 14 2 6 4 */
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/*:ref: analys_ 14 5 6 4 4 6 6 */
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/*:ref: encode_ 14 7 4 4 6 6 4 4 4 */
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/*:ref: chanwr_ 14 5 4 4 4 4 4 */
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/*:ref: initprepro_ 14 0 */
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/*:ref: initanalys_ 14 0 */
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#endif
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/* Table of constant values */
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static integer c__180 = 180;
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static integer c__10 = 10;
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/* ***************************************************************** */
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/* $Log$
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* Revision 1.15 2004/06/26 03:50:14 markster
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* Merge source cleanups (bug #1911)
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*
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* Revision 1.14 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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* Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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* Revision 1.2 2000/01/05 08:20:39 markster
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* Some OSS fixes and a few lpc changes to make it actually work
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*
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* Revision 1.2 1996/08/20 20:31:21 jaf
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* Removed all static local variables that were SAVE'd in the Fortran
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* code, and put them in struct lpc10_encoder_state that is passed as an
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* argument.
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*
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* Removed init function, since all initialization is now done in
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* init_lpc10_encoder_state().
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*
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* Changed name of function from lpcenc_ to lpc10_encode, simply to make
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* all lpc10 functions have more consistent naming with each other.
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*
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* Revision 1.1 1996/08/19 22:31:44 jaf
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* Initial revision
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* */
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/* Revision 1.2 1996/03/28 00:01:22 jaf */
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/* Commented out some trace statements. */
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/* Revision 1.1 1996/03/28 00:00:27 jaf */
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/* Initial revision */
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/* ***************************************************************** */
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/* Encode one frame of 180 speech samples to 54 bits. */
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/* Input: */
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/* SPEECH - Speech encoded as real values in the range [-1,+1]. */
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/* Indices 1 through 180 read, and modified (by PREPRO). */
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/* Output: */
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/* BITS - 54 encoded bits, stored 1 per array element. */
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/* Indices 1 through 54 written. */
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/* This subroutine maintains local state from one call to the next. If */
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/* you want to switch to using a new audio stream for this filter, or */
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/* reinitialize its state for any other reason, call the ENTRY */
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/* INITLPCENC. */
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/* Subroutine */ int lpc10_encode(real *speech, integer *bits,
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struct lpc10_encoder_state *st)
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{
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integer irms, voice[2], pitch, ipitv;
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real rc[10];
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extern /* Subroutine */ int encode_(integer *, integer *, real *, real *,
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integer *, integer *, integer *), chanwr_(integer *, integer *,
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integer *, integer *, integer *, struct lpc10_encoder_state *),
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analys_(real *, integer *,
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integer *, real *, real *, struct lpc10_encoder_state *),
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prepro_(real *, integer *, struct lpc10_encoder_state *);
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integer irc[10];
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real rms;
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/* Arguments */
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/* $Log$
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* Revision 1.15 2004/06/26 03:50:14 markster
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* Merge source cleanups (bug #1911)
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*
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* Revision 1.14 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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* Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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* Revision 1.2 2000/01/05 08:20:39 markster
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* Some OSS fixes and a few lpc changes to make it actually work
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*
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* Revision 1.2 1996/08/20 20:31:21 jaf
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* Removed all static local variables that were SAVE'd in the Fortran
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* code, and put them in struct lpc10_encoder_state that is passed as an
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* argument.
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*
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* Removed init function, since all initialization is now done in
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* init_lpc10_encoder_state().
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*
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* Changed name of function from lpcenc_ to lpc10_encode, simply to make
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* all lpc10 functions have more consistent naming with each other.
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*
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* Revision 1.1 1996/08/19 22:31:44 jaf
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* Initial revision
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* */
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/* Revision 1.3 1996/03/29 22:03:47 jaf */
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/* Removed definitions for any constants that were no longer used. */
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/* Revision 1.2 1996/03/26 19:34:33 jaf */
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/* Added comments indicating which constants are not needed in an */
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/* application that uses the LPC-10 coder. */
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/* Revision 1.1 1996/02/07 14:43:51 jaf */
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/* Initial revision */
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/* LPC Configuration parameters: */
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/* Frame size, Prediction order, Pitch period */
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/* Local variables that need not be saved */
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/* Uncoded speech parameters */
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/* Coded speech parameters */
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/* Local state */
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/* None */
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/* Parameter adjustments */
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if (speech) {
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--speech;
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}
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if (bits) {
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--bits;
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}
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/* Function Body */
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prepro_(&speech[1], &c__180, st);
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analys_(&speech[1], voice, &pitch, &rms, rc, st);
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encode_(voice, &pitch, &rms, rc, &ipitv, &irms, irc);
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chanwr_(&c__10, &ipitv, &irms, irc, &bits[1], st);
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return 0;
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} /* lpcenc_ */
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