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Diffstat (limited to 'trunk/codecs/lpc10/bsynz.c')
| -rw-r--r-- | trunk/codecs/lpc10/bsynz.c | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/trunk/codecs/lpc10/bsynz.c b/trunk/codecs/lpc10/bsynz.c new file mode 100644 index 000000000..daf9105d6 --- /dev/null +++ b/trunk/codecs/lpc10/bsynz.c @@ -0,0 +1,447 @@ +/* + +$Log$ +Revision 1.15 2004/06/26 03:50:14 markster +Merge source cleanups (bug #1911) + +Revision 1.14 2003/02/12 13:59:14 matteo +mer feb 12 14:56:57 CET 2003 + +Revision 1.1.1.1 2003/02/12 13:59:14 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 20:18:55 jaf + * Removed all static local variables that were SAVE'd in the Fortran + * code, and put them in struct lpc10_decoder_state that is passed as an + * argument. + * + * Removed init function, since all initialization is now done in + * init_lpc10_decoder_state(). + * + * Revision 1.1 1996/08/19 22:32:58 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 bsynz_(real *coef, integer *ip, integer *iv, real *sout, real *rms, real *ratio, real *g2pass, struct lpc10_decoder_state *st); +/* comlen contrl_ 12 */ +/*:ref: random_ 4 0 */ +#endif + +/* Common Block Declarations */ + +extern struct { + integer order, lframe; + logical corrp; +} contrl_; + +#define contrl_1 contrl_ + +/* ***************************************************************** */ + +/* BSYNZ Version 54 */ + +/* $Log$ + * Revision 1.15 2004/06/26 03:50:14 markster + * Merge source cleanups (bug #1911) + * + * Revision 1.14 2003/02/12 13:59:14 matteo + * mer feb 12 14:56:57 CET 2003 + * + * Revision 1.1.1.1 2003/02/12 13:59:14 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 20:18:55 jaf + * Removed all static local variables that were SAVE'd in the Fortran + * code, and put them in struct lpc10_decoder_state that is passed as an + * argument. + * + * Removed init function, since all initialization is now done in + * init_lpc10_decoder_state(). + * + * Revision 1.1 1996/08/19 22:32:58 jaf + * Initial revision + * */ +/* Revision 1.4 1996/03/27 18:11:22 jaf */ +/* Changed the range of NOISE printed out in the debugging statements, */ +/* even though they are commented out. I didn't discover this until I */ +/* tried comparing two different versions of the LPC-10 coder, each with */ +/* full tracing enabled. */ + +/* Revision 1.3 1996/03/26 19:33:23 jaf */ +/* Commented out trace statements. */ + +/* Revision 1.2 1996/03/20 17:12:54 jaf */ +/* Added comments about which indices of array arguments are read or */ +/* written. */ + +/* Rearranged local variable declarations to indicate which need to be */ +/* saved from one invocation to the next. Added entry INITBSYNZ to */ +/* reinitialize the local state variables, if desired. */ + +/* Revision 1.1 1996/02/07 14:43:15 jaf */ +/* Initial revision */ + + +/* ***************************************************************** */ + +/* Synthesize One Pitch Epoch */ + +/* Input: */ +/* COEF - Predictor coefficients */ +/* Indices 1 through ORDER read. */ +/* IP - Pitch period (number of samples to synthesize) */ +/* IV - Voicing for the current epoch */ +/* RMS - Energy for the current epoch */ +/* RATIO - Energy slope for plosives */ +/* G2PASS- Sharpening factor for 2 pass synthesis */ +/* Output: */ +/* SOUT - Synthesized speech */ +/* Indices 1 through IP 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 */ +/* INITBSYNZ. */ + +/* Subroutine */ int bsynz_(real *coef, integer *ip, integer *iv, + real *sout, real *rms, real *ratio, real *g2pass, + struct lpc10_decoder_state *st) +{ + /* Initialized data */ + + integer *ipo; + real *rmso; + static integer kexc[25] = { 8,-16,26,-48,86,-162,294,-502,718,-728,184, + 672,-610,-672,184,728,718,502,294,162,86,48,26,16,8 }; + real *exc; + real *exc2; + real *lpi1; + real *lpi2; + real *lpi3; + real *hpi1; + real *hpi2; + real *hpi3; + + /* System generated locals */ + integer i__1, i__2; + real r__1, r__2; + + /* Builtin functions */ + double sqrt(doublereal); + + /* Local variables */ + real gain, xssq; + integer i__, j, k; + real noise[166], pulse; + integer px; + real sscale; + extern integer random_(struct lpc10_decoder_state *); + real xy, sum, ssq; + real lpi0, hpi0; + +/* $Log$ + * Revision 1.15 2004/06/26 03:50:14 markster + * Merge source cleanups (bug #1911) + * + * Revision 1.14 2003/02/12 13:59:14 matteo + * mer feb 12 14:56:57 CET 2003 + * + * Revision 1.1.1.1 2003/02/12 13:59:14 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 20:18:55 jaf + * Removed all static local variables that were SAVE'd in the Fortran + * code, and put them in struct lpc10_decoder_state that is passed as an + * argument. + * + * Removed init function, since all initialization is now done in + * init_lpc10_decoder_state(). + * + * Revision 1.1 1996/08/19 22:32:58 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 */ +/* Arguments */ +/* $Log$ + * Revision 1.15 2004/06/26 03:50:14 markster + * Merge source cleanups (bug #1911) + * + * Revision 1.14 2003/02/12 13:59:14 matteo + * mer feb 12 14:56:57 CET 2003 + * + * Revision 1.1.1.1 2003/02/12 13:59:14 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 20:18:55 jaf + * Removed all static local variables that were SAVE'd in the Fortran + * code, and put them in struct lpc10_decoder_state that is passed as an + * argument. + * + * Removed init function, since all initialization is now done in + * init_lpc10_decoder_state(). + * + * Revision 1.1 1996/08/19 22:32:58 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 */ +/* Function return value definitions */ +/* Parameters/constants */ +/* KEXC is not a Fortran PARAMETER, but it is an array initialized +*/ +/* with a DATA statement that is never modified. */ +/* Local variables that need not be saved */ +/* NOISE is declared with range (1:MAXPIT+MAXORD), but only indices +*/ +/* ORDER+1 through ORDER+IP are ever used, and I think that IP */ +/* .LE. MAXPIT. Why not declare it to be in the range (1:MAXPIT) */ +/* and use that range? */ +/* Local state */ +/* I believe that only indices 1 through ORDER of EXC need to be */ +/* saved from one invocation to the next, but we may as well save */ +/* the whole array. */ +/* None of these local variables were given initial values in the */ +/* original code. I'm guessing that 0 is a reasonable initial */ +/* value for all of them. */ + /* Parameter adjustments */ + if (coef) { + --coef; + } + if (sout) { + --sout; + } + + /* Function Body */ + ipo = &(st->ipo); + exc = &(st->exc[0]); + exc2 = &(st->exc2[0]); + lpi1 = &(st->lpi1); + lpi2 = &(st->lpi2); + lpi3 = &(st->lpi3); + hpi1 = &(st->hpi1); + hpi2 = &(st->hpi2); + hpi3 = &(st->hpi3); + rmso = &(st->rmso_bsynz); + +/* MAXPIT+MAXORD=166 */ +/* Calculate history scale factor XY and scale filter state */ +/* Computing MIN */ + r__1 = *rmso / (*rms + 1e-6f); + xy = min(r__1,8.f); + *rmso = *rms; + i__1 = contrl_1.order; + for (i__ = 1; i__ <= i__1; ++i__) { + exc2[i__ - 1] = exc2[*ipo + i__ - 1] * xy; + } + *ipo = *ip; + if (*iv == 0) { +/* Generate white noise for unvoiced */ + i__1 = *ip; + for (i__ = 1; i__ <= i__1; ++i__) { + exc[contrl_1.order + i__ - 1] = (real) (random_(st) / 64); + } +/* Impulse doublet excitation for plosives */ +/* (RANDOM()+32768) is in the range 0 to 2**16-1. Therefore the + */ +/* following expression should be evaluated using integers with +at */ +/* least 32 bits (16 isn't enough), and PX should be in the rang +e */ +/* ORDER+1+0 through ORDER+1+(IP-2) .EQ. ORDER+IP-1. */ + px = (random_(st) + 32768) * (*ip - 1) / 65536 + contrl_1.order + 1; + r__1 = *ratio / 4 * 1.f; + pulse = r__1 * 342; + if (pulse > 2e3f) { + pulse = 2e3f; + } + exc[px - 1] += pulse; + exc[px] -= pulse; +/* Load voiced excitation */ + } else { + sscale = (real)sqrt((real) (*ip)) / 6.928f; + i__1 = *ip; + for (i__ = 1; i__ <= i__1; ++i__) { + exc[contrl_1.order + i__ - 1] = 0.f; + if (i__ <= 25) { + exc[contrl_1.order + i__ - 1] = sscale * kexc[i__ - 1]; + } + lpi0 = exc[contrl_1.order + i__ - 1]; + r__2 = exc[contrl_1.order + i__ - 1] * .125f + *lpi1 * .75f; + r__1 = r__2 + *lpi2 * .125f; + exc[contrl_1.order + i__ - 1] = r__1 + *lpi3 * 0.f; + *lpi3 = *lpi2; + *lpi2 = *lpi1; + *lpi1 = lpi0; + } + i__1 = *ip; + for (i__ = 1; i__ <= i__1; ++i__) { + noise[contrl_1.order + i__ - 1] = random_(st) * 1.f / 64; + hpi0 = noise[contrl_1.order + i__ - 1]; + r__2 = noise[contrl_1.order + i__ - 1] * -.125f + *hpi1 * .25f; + r__1 = r__2 + *hpi2 * -.125f; + noise[contrl_1.order + i__ - 1] = r__1 + *hpi3 * 0.f; + *hpi3 = *hpi2; + *hpi2 = *hpi1; + *hpi1 = hpi0; + } + i__1 = *ip; + for (i__ = 1; i__ <= i__1; ++i__) { + exc[contrl_1.order + i__ - 1] += noise[contrl_1.order + i__ - 1]; + } + } +/* Synthesis filters: */ +/* Modify the excitation with all-zero filter 1 + G*SUM */ + xssq = 0.f; + i__1 = *ip; + for (i__ = 1; i__ <= i__1; ++i__) { + k = contrl_1.order + i__; + sum = 0.f; + i__2 = contrl_1.order; + for (j = 1; j <= i__2; ++j) { + sum += coef[j] * exc[k - j - 1]; + } + sum *= *g2pass; + exc2[k - 1] = sum + exc[k - 1]; + } +/* Synthesize using the all pole filter 1 / (1 - SUM) */ + i__1 = *ip; + for (i__ = 1; i__ <= i__1; ++i__) { + k = contrl_1.order + i__; + sum = 0.f; + i__2 = contrl_1.order; + for (j = 1; j <= i__2; ++j) { + sum += coef[j] * exc2[k - j - 1]; + } + exc2[k - 1] = sum + exc2[k - 1]; + xssq += exc2[k - 1] * exc2[k - 1]; + } +/* Save filter history for next epoch */ + i__1 = contrl_1.order; + for (i__ = 1; i__ <= i__1; ++i__) { + exc[i__ - 1] = exc[*ip + i__ - 1]; + exc2[i__ - 1] = exc2[*ip + i__ - 1]; + } +/* Apply gain to match RMS */ + r__1 = *rms * *rms; + ssq = r__1 * *ip; + gain = (real)sqrt(ssq / xssq); + i__1 = *ip; + for (i__ = 1; i__ <= i__1; ++i__) { + sout[i__] = gain * exc2[contrl_1.order + i__ - 1]; + } + return 0; +} /* bsynz_ */ |