diff options
Diffstat (limited to 'trunk/codecs/lpc10/dyptrk.c')
| -rw-r--r-- | trunk/codecs/lpc10/dyptrk.c | 405 |
1 files changed, 0 insertions, 405 deletions
diff --git a/trunk/codecs/lpc10/dyptrk.c b/trunk/codecs/lpc10/dyptrk.c deleted file mode 100644 index 216b55994..000000000 --- a/trunk/codecs/lpc10/dyptrk.c +++ /dev/null @@ -1,405 +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 20:25:29 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 22:32:26 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 dyptrk_(real *amdf, integer *ltau, integer *minptr, integer *voice, integer *pitch, integer *midx, struct lpc10_encoder_state *st); -/* comlen contrl_ 12 */ -#endif - -/* Common Block Declarations */ - -extern struct { - integer order, lframe; - logical corrp; -} contrl_; - -#define contrl_1 contrl_ - -/* ********************************************************************* */ - -/* DYPTRK Version 52 */ - -/* $Log$ - * 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 20:25:29 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 22:32:26 jaf - * Initial revision - * */ -/* Revision 1.5 1996/03/26 19:35:35 jaf */ -/* Commented out trace statements. */ - -/* Revision 1.4 1996/03/19 18:03:22 jaf */ -/* Replaced the initialization "DATA P/60*DEPTH*0/" with "DATA P/120*0/", */ -/* because apparently Fortran (or at least f2c) can't handle expressions */ -/* like that. */ - -/* Revision 1.3 1996/03/19 17:38:32 jaf */ -/* Added comments about the local variables that should be saved from one */ -/* invocation to the next. None of them were given initial values in the */ -/* original code, but from my testing, it appears that initializing them */ -/* all to 0 works. */ - -/* Added entry INITDYPTRK to reinitialize these local variables. */ - -/* Revision 1.2 1996/03/13 16:32:17 jaf */ -/* Comments added explaining which of the local variables of this */ -/* subroutine need to be saved from one invocation to the next, and which */ -/* do not. */ - -/* WARNING! Some of them that should are never given initial values in */ -/* this code. Hopefully, Fortran 77 defines initial values for them, but */ -/* even so, giving them explicit initial values is preferable. */ - -/* Revision 1.1 1996/02/07 14:45:14 jaf */ -/* Initial revision */ - - -/* ********************************************************************* */ - -/* Dynamic Pitch Tracker */ - -/* Input: */ -/* AMDF - Average Magnitude Difference Function array */ -/* Indices 1 through LTAU read, and MINPTR */ -/* LTAU - Number of lags in AMDF */ -/* MINPTR - Location of minimum AMDF value */ -/* VOICE - Voicing decision */ -/* Output: */ -/* PITCH - Smoothed pitch value, 2 frames delayed */ -/* MIDX - Initial estimate of current frame pitch */ -/* Compile time constant: */ -/* DEPTH - Number of frames to trace back */ - -/* 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 */ -/* INITDYPTRK. */ - -/* Subroutine */ int dyptrk_(real *amdf, integer *ltau, integer * - minptr, integer *voice, integer *pitch, integer *midx, - struct lpc10_encoder_state *st) -{ - /* Initialized data */ - - real *s; - integer *p; - integer *ipoint; - real *alphax; - - /* System generated locals */ - integer i__1; - - /* Local variables */ - integer pbar; - real sbar; - integer path[2], iptr, i__, j; - real alpha, minsc, maxsc; - -/* 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 20:25:29 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 22:32:26 jaf - * Initial revision - * */ -/* Revision 1.3 1996/03/29 22:05:55 jaf */ -/* Commented out the common block variables that are not needed by the */ -/* embedded version. */ - -/* Revision 1.2 1996/03/26 19:34:50 jaf */ -/* Added comments indicating which constants are not needed in an */ -/* application that uses the LPC-10 coder. */ - -/* Revision 1.1 1996/02/07 14:44:09 jaf */ -/* Initial revision */ - -/* LPC Processing control variables: */ - -/* *** Read-only: initialized in setup */ - -/* Files for Speech, Parameter, and Bitstream Input & Output, */ -/* and message and debug outputs. */ - -/* Here are the only files which use these variables: */ - -/* lpcsim.f setup.f trans.f error.f vqsetup.f */ - -/* Many files which use fdebug are not listed, since it is only used in */ -/* those other files conditionally, to print trace statements. */ -/* integer fsi, fso, fpi, fpo, fbi, fbo, pbin, fmsg, fdebug */ -/* LPC order, Frame size, Quantization rate, Bits per frame, */ -/* Error correction */ -/* Subroutine SETUP is the only place where order is assigned a value, */ -/* and that value is 10. It could increase efficiency 1% or so to */ -/* declare order as a constant (i.e., a Fortran PARAMETER) instead of as -*/ -/* a variable in a COMMON block, since it is used in many places in the */ -/* core of the coding and decoding routines. Actually, I take that back. -*/ -/* At least when compiling with f2c, the upper bound of DO loops is */ -/* stored in a local variable before the DO loop begins, and then that is -*/ -/* compared against on each iteration. */ -/* Similarly for lframe, which is given a value of MAXFRM in SETUP. */ -/* Similarly for quant, which is given a value of 2400 in SETUP. quant */ -/* is used in only a few places, and never in the core coding and */ -/* decoding routines, so it could be eliminated entirely. */ -/* nbits is similar to quant, and is given a value of 54 in SETUP. */ -/* corrp is given a value of .TRUE. in SETUP, and is only used in the */ -/* subroutines ENCODE and DECODE. It doesn't affect the speed of the */ -/* coder significantly whether it is .TRUE. or .FALSE., or whether it is -*/ -/* a constant or a variable, since it is only examined once per frame. */ -/* Leaving it as a variable that is set to .TRUE. seems like a good */ -/* idea, since it does enable some error-correction capability for */ -/* unvoiced frames, with no change in the coding rate, and no noticeable -*/ -/* quality difference in the decoded speech. */ -/* integer quant, nbits */ -/* *** Read/write: variables for debugging, not needed for LPC algorithm -*/ - -/* Current frame, Unstable frames, Output clip count, Max onset buffer, -*/ -/* Debug listing detail level, Line count on listing page */ - -/* nframe is not needed for an embedded LPC10 at all. */ -/* nunsfm is initialized to 0 in SETUP, and incremented in subroutine */ -/* ERROR, which is only called from RCCHK. When LPC10 is embedded into */ -/* an application, I would recommend removing the call to ERROR in RCCHK, -*/ -/* and remove ERROR and nunsfm completely. */ -/* iclip is initialized to 0 in SETUP, and incremented in entry SWRITE in -*/ -/* sread.f. When LPC10 is embedded into an application, one might want */ -/* to cause it to be incremented in a routine that takes the output of */ -/* SYNTHS and sends it to an audio device. It could be optionally */ -/* displayed, for those that might want to know what it is. */ -/* maxosp is never initialized to 0 in SETUP, although it probably should -*/ -/* be, and it is updated in subroutine ANALYS. I doubt that its value */ -/* would be of much interest to an application in which LPC10 is */ -/* embedded. */ -/* listl and lincnt are not needed for an embedded LPC10 at all. */ -/* integer nframe, nunsfm, iclip, maxosp, listl, lincnt */ -/* common /contrl/ fsi, fso, fpi, fpo, fbi, fbo, pbin, fmsg, fdebug */ -/* common /contrl/ quant, nbits */ -/* common /contrl/ nframe, nunsfm, iclip, maxosp, listl, lincnt */ -/* Parameters/constants */ -/* Local variables that need not be saved */ -/* Note that PATH is only used for debugging purposes, and can be */ -/* removed. */ -/* Local state */ -/* It would be a bit more "general" to define S(LTAU), if Fortran */ -/* allows the argument of a function to be used as the dimension of -*/ -/* a local array variable. */ -/* IPOINT is always in the range 0 to DEPTH-1. */ -/* WARNING! */ - -/* In the original version of this subroutine, IPOINT, ALPHAX, */ -/* every element of S, and potentially any element of P with the */ -/* second index value .NE. IPTR were read without being given */ -/* initial values (all indices of P with second index equal to */ -/* IPTR are all written before being read in this subroutine). */ - -/* From examining the code carefully, it appears that all of these -*/ -/* should be saved from one invocation to the next. */ - -/* I've run lpcsim with the "-l 6" option to see all of the */ -/* debugging information that is printed out by this subroutine */ -/* below, and it appears that S, P, IPOINT, and ALPHAX are all */ -/* initialized to 0 (these initial values would likely be different -*/ -/* on different platforms, compilers, etc.). Given that the output -*/ -/* of the coder sounds reasonable, I'm going to initialize these */ -/* variables to 0 explicitly. */ - - s = &(st->s[0]); - p = &(st->p[0]); - ipoint = &(st->ipoint); - alphax = &(st->alphax); - - - /* Parameter adjustments */ - if (amdf) { - --amdf; - } - - /* Function Body */ - -/* Calculate the confidence factor ALPHA, used as a threshold slope in -*/ -/* SEESAW. If unvoiced, set high slope so that every point in P array -*/ -/* is marked as a potential pitch frequency. A scaled up version (ALPHAX -)*/ -/* is used to maintain arithmetic precision. */ - if (*voice == 1) { - *alphax = *alphax * .75f + amdf[*minptr] / 2.f; - } else { - *alphax *= .984375f; - } - alpha = *alphax / 16; - if (*voice == 0 && *alphax < 128.f) { - alpha = 8.f; - } -/* SEESAW: Construct a pitch pointer array and intermediate winner functio -n*/ -/* Left to right pass: */ - iptr = *ipoint + 1; - p[iptr * 60 - 60] = 1; - i__ = 1; - pbar = 1; - sbar = s[0]; - i__1 = *ltau; - for (i__ = 1; i__ <= i__1; ++i__) { - sbar += alpha; - if (sbar < s[i__ - 1]) { - s[i__ - 1] = sbar; - p[i__ + iptr * 60 - 61] = pbar; - } else { - sbar = s[i__ - 1]; - p[i__ + iptr * 60 - 61] = i__; - pbar = i__; - } - } -/* Right to left pass: */ - i__ = pbar - 1; - sbar = s[i__]; - while(i__ >= 1) { - sbar += alpha; - if (sbar < s[i__ - 1]) { - s[i__ - 1] = sbar; - p[i__ + iptr * 60 - 61] = pbar; - } else { - pbar = p[i__ + iptr * 60 - 61]; - i__ = pbar; - sbar = s[i__ - 1]; - } - --i__; - } -/* Update S using AMDF */ -/* Find maximum, minimum, and location of minimum */ - s[0] += amdf[1] / 2; - minsc = s[0]; - maxsc = minsc; - *midx = 1; - i__1 = *ltau; - for (i__ = 2; i__ <= i__1; ++i__) { - s[i__ - 1] += amdf[i__] / 2; - if (s[i__ - 1] > maxsc) { - maxsc = s[i__ - 1]; - } - if (s[i__ - 1] < minsc) { - *midx = i__; - minsc = s[i__ - 1]; - } - } -/* Subtract MINSC from S to prevent overflow */ - i__1 = *ltau; - for (i__ = 1; i__ <= i__1; ++i__) { - s[i__ - 1] -= minsc; - } - maxsc -= minsc; -/* Use higher octave pitch if significant null there */ - j = 0; - for (i__ = 20; i__ <= 40; i__ += 10) { - if (*midx > i__) { - if (s[*midx - i__ - 1] < maxsc / 4) { - j = i__; - } - } - } - *midx -= j; -/* TRACE: look back two frames to find minimum cost pitch estimate */ - j = *ipoint; - *pitch = *midx; - for (i__ = 1; i__ <= 2; ++i__) { - j = j % 2 + 1; - *pitch = p[*pitch + j * 60 - 61]; - path[i__ - 1] = *pitch; - } - -/* The following statement subtracts one from IPOINT, mod DEPTH. I -*/ -/* think the author chose to add DEPTH-1, instead of subtracting 1, -*/ -/* because then it will work even if MOD doesn't work as desired on -*/ -/* negative arguments. */ - - *ipoint = (*ipoint + 1) % 2; - return 0; -} /* dyptrk_ */ |