diff options
Diffstat (limited to '1.4.23-rc4/codecs/lpc10/onset.c')
| -rw-r--r-- | 1.4.23-rc4/codecs/lpc10/onset.c | 324 |
1 files changed, 0 insertions, 324 deletions
diff --git a/1.4.23-rc4/codecs/lpc10/onset.c b/1.4.23-rc4/codecs/lpc10/onset.c deleted file mode 100644 index ddca3b477..000000000 --- a/1.4.23-rc4/codecs/lpc10/onset.c +++ /dev/null @@ -1,324 +0,0 @@ -/* - -$Log$ -Revision 1.15 2004/06/26 03:50:14 markster -Merge source cleanups (bug #1911) - -Revision 1.14 2003/02/12 13:59:15 matteo -mer feb 12 14:56:57 CET 2003 - -Revision 1.1.1.1 2003/02/12 13:59:15 matteo -mer feb 12 14:56:57 CET 2003 - -Revision 1.2 2000/01/05 08:20:39 markster -Some OSS fixes and a few lpc changes to make it actually work - - * Revision 1.2 1996/08/20 20:37:55 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(). - * - * Revision 1.1 1996/08/19 22:31:18 jaf - * Initial revision - * - -*/ - -/* -- translated by f2c (version 19951025). - You must link the resulting object file with the libraries: - -lf2c -lm (in that order) -*/ - -#include "f2c.h" - -#ifdef P_R_O_T_O_T_Y_P_E_S -extern int onset_(real *pebuf, integer *osbuf, integer *osptr, integer *oslen, integer *sbufl, integer *sbufh, integer *lframe, struct lpc10_encoder_state *st); -#endif - -/* Table of constant values */ - -static real c_b2 = 1.f; - -/* ****************************************************************** */ - -/* ONSET Version 49 */ - -/* $Log$ - * Revision 1.15 2004/06/26 03:50:14 markster - * Merge source cleanups (bug #1911) - * - * Revision 1.14 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.1.1.1 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.2 2000/01/05 08:20:39 markster - * Some OSS fixes and a few lpc changes to make it actually work - * - * Revision 1.2 1996/08/20 20:37:55 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(). - * - * Revision 1.1 1996/08/19 22:31:18 jaf - * Initial revision - * */ -/* Revision 1.5 1996/03/15 16:41:01 jaf */ -/* Just rearranged INITONSET assignment orders to be consistent with */ -/* order of DATA statements in ONSET. */ - -/* Revision 1.4 1996/03/15 15:48:27 jaf */ -/* Changed some comments, and only reordered the DATA statements (their */ -/* meaning wasn't changed). */ - -/* Revision 1.3 1996/03/14 23:53:06 jaf */ -/* Added an entry INITONSET that reinitializes the local state variables */ -/* of subroutine ONSET. */ - -/* Rearranged quite a few comments, adding more explaining which */ -/* arguments were inputs, and how the modified ones can be changed. */ - -/* Revision 1.2 1996/03/12 23:53:00 jaf */ -/* Lots of comments added about the local state of this subroutine that */ -/* must be saved from one invocation to the next. */ - -/* One constant 180 replaced with LFRAME, which should be "more general", */ -/* even though it would probably require many more changes than this to */ -/* get this coder to work for other frame sizes. */ - -/* Revision 1.1 1996/02/07 14:48:09 jaf */ -/* Initial revision */ - - -/* ****************************************************************** */ - -/* Floating point version */ - - -/* Detection of onsets in (or slightly preceding) the futuremost frame */ -/* of speech. */ - - -/* Input: */ -/* PEBUF(SBUFL:SBUFH) - Preemphasized speech */ -/* Indices SBUFH-LFRAME through SBUFH are read. */ -/* OSLEN - Maximum number of onsets that can be stored in OSBUF. */ -/* SBUFL, SBUFH - Range of PEBUF */ -/* LFRAME - length of a frame, in samples */ -/* Input/Output: */ -/* OSBUF(OSLEN) - Buffer which holds sorted indexes of onsets */ -/* Indices A through B are modified, where A */ -/* is the original value of OSPTR, and B is the final */ -/* value of OSPTR-1. B is at most OSLEN. */ -/* OSPTR - Free pointer into OSBUF */ -/* Initial value should be .LE. OSLEN+1. */ -/* If so, final value grows by one for each new onset */ -/* found, and final value will be .LE. OSLEN+1. */ - -/* This subroutine maintains local state from one call to the next. If */ -/* you want to switch to using a new audio stream for this subroutine, or */ -/* reinitialize its state for any other reason, call the ENTRY INITONSET. */ - -/* Subroutine */ int onset_(real *pebuf, integer *osbuf, integer * - osptr, integer *oslen, integer *sbufl, integer *sbufh, integer * - lframe, struct lpc10_encoder_state *st) -{ - /* Initialized data */ - - real *n; - real *d__; - real *l2buf; - real *l2sum1; - integer *l2ptr1; - integer *l2ptr2; - logical *hyst; - - /* System generated locals */ - integer pebuf_offset, i__1; - real r__1; - - /* Builtin functions */ - double r_sign(real *, real *); - - /* Local variables */ - integer i__; - integer *lasti; - real l2sum2; - real *fpc; - -/* Arguments */ -/* $Log$ - * Revision 1.15 2004/06/26 03:50:14 markster - * Merge source cleanups (bug #1911) - * - * Revision 1.14 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.1.1.1 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.2 2000/01/05 08:20:39 markster - * Some OSS fixes and a few lpc changes to make it actually work - * - * Revision 1.2 1996/08/20 20:37:55 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(). - * - * Revision 1.1 1996/08/19 22:31:18 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 */ -/* Parameters/constants */ -/* Parameters for onset detection algorithm: */ -/* L2 Threshold for filtered slope of FPC (function of L2WID!) */ -/* L2LAG Lag due to both filters which compute filtered slope of FPC */ -/* L2WID Width of the filter which computes the slope of FPC */ -/* OSHYST The number of samples of slope(FPC) which must be below */ -/* the threshold before a new onset may be declared. */ -/* Local variables that need not be saved */ -/* Local state */ -/* Variables */ -/* N, D Numerator and denominator of prediction filters */ -/* FPC Current prediction coefs */ -/* L2BUF, L2SUM1, L2SUM2 State of slope filter */ -/* The only "significant" change I've made is to change L2SUM2 out -*/ -/* of the list of local variables that need to be saved, since it */ -/* didn't need to be. */ -/* L2SUM1 need not be, but avoiding saving it would require a small -*/ -/* change to the body of the code. See comments below for an */ -/* example of how the code could be changed to avoid saving L2SUM1. -*/ -/* FPC and LASTI are saved from one invocation to the next, but */ -/* they are not given initial values. This is acceptable, because -*/ -/* FPC will be assigned a value the first time that this function */ -/* is called after D is initialized to 1, since the formula to */ -/* change D will not change it to 0 in one step, and the IF (D */ -/* .NE. 0) statement will execute its THEN part, initializing FPC. -*/ - -/* LASTI's value will not be used until HYST is .TRUE., and */ -/* whenever HYST is changed from its initial value of .FALSE., */ -/* LASTI is assigned a value. */ -/* In a C version of this coder, it would be nice if all of these */ -/* saved things, in this and all other subroutines, could be stored -*/ -/* in a single struct lpc10_coder_state_t, initialized with a call -*/ -/* to a function like lpc10_init(&lpc10_coder_state). In this way, -*/ -/* a program that used these functions could conveniently alternate -*/ -/* coding more than one distinct audio stream. */ - - n = &(st->n); - d__ = &(st->d__); - fpc = &(st->fpc); - l2buf = &(st->l2buf[0]); - l2sum1 = &(st->l2sum1); - l2ptr1 = &(st->l2ptr1); - l2ptr2 = &(st->l2ptr2); - lasti = &(st->lasti); - hyst = &(st->hyst); - - /* Parameter adjustments */ - if (osbuf) { - --osbuf; - } - if (pebuf) { - pebuf_offset = *sbufl; - pebuf -= pebuf_offset; - } - - /* Function Body */ - -/* The following line subtracted a hard-coded "180" from LASTI, */ -/* instead of using a variable like LFRAME or a constant like */ -/* MAXFRM. I changed it to LFRAME, for "generality". */ - if (*hyst) { - *lasti -= *lframe; - } - i__1 = *sbufh; - for (i__ = *sbufh - *lframe + 1; i__ <= i__1; ++i__) { -/* Compute FPC; Use old FPC on divide by zero; Clamp FPC to +/- 1. -*/ - *n = (pebuf[i__] * pebuf[i__ - 1] + (*n) * 63.f) / 64.f; -/* Computing 2nd power */ - r__1 = pebuf[i__ - 1]; - *d__ = (r__1 * r__1 + (*d__) * 63.f) / 64.f; - if ((*d__) != 0.f) { - if (abs(*n) > (*d__)) { - *fpc = (real)r_sign(&c_b2, n); - } else { - *fpc = (*n) / (*d__); - } - } -/* Filter FPC */ -/* In order to allow L2SUM1 not to be saved from one invocation -of */ -/* this subroutine to the next, one could change the sequence of - */ -/* assignments below, up to the IF statement, to the following. - In */ -/* addition, the initial value of L2PTR2 should be changed to */ -/* L2WID/2 instead of L2WID/2+1. */ - -/* L2SUM1 = L2BUF(L2PTR2) */ -/* L2PTR2 = MOD(L2PTR2,L2WID)+1 */ -/* L2SUM1 = L2SUM1 - L2BUF(L2PTR2) + FPC */ -/* L2BUF(L2PTR2) = L2SUM1 */ - -/* * The following lines didn't change from the original: */ -/* L2SUM2 = L2BUF(L2PTR1) */ -/* L2BUF(L2PTR1) = FPC */ -/* L2PTR1 = MOD(L2PTR1,L2WID)+1 */ - - l2sum2 = l2buf[*l2ptr1 - 1]; - *l2sum1 = *l2sum1 - l2buf[*l2ptr2 - 1] + *fpc; - l2buf[*l2ptr2 - 1] = *l2sum1; - l2buf[*l2ptr1 - 1] = *fpc; - *l2ptr1 = *l2ptr1 % 16 + 1; - *l2ptr2 = *l2ptr2 % 16 + 1; - if ((r__1 = *l2sum1 - l2sum2, abs(r__1)) > 1.7f) { - if (! (*hyst)) { -/* Ignore if buffer full */ - if (*osptr <= *oslen) { - osbuf[*osptr] = i__ - 9; - ++(*osptr); - } - *hyst = TRUE_; - } - *lasti = i__; -/* After one onset detection, at least OSHYST sample times m -ust go */ -/* by before another is allowed to occur. */ - } else if ((*hyst) && i__ - *lasti >= 10) { - *hyst = FALSE_; - } - } - return 0; -} /* onset_ */ |