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Diffstat (limited to '1.4.23-rc4/codecs/lpc10/synths.c')
| -rw-r--r-- | 1.4.23-rc4/codecs/lpc10/synths.c | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/1.4.23-rc4/codecs/lpc10/synths.c b/1.4.23-rc4/codecs/lpc10/synths.c new file mode 100644 index 000000000..4c5a70fac --- /dev/null +++ b/1.4.23-rc4/codecs/lpc10/synths.c @@ -0,0 +1,425 @@ +/* + +$Log$ +Revision 1.16 2004/06/26 03:50:14 markster +Merge source cleanups (bug #1911) + +Revision 1.15 2003/09/27 02:45:37 markster +Fix various compiler warnings (bug #322) + +Revision 1.2 2003/09/27 02:45:37 markster +Fix various compiler warnings (bug #322) + +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 20:42:59 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 22:30:33 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 synths_(integer *voice, integer *pitch, real *rms, real *rc, real *speech, integer *k, struct lpc10_decoder_state *st); +/* comlen contrl_ 12 */ +/*:ref: pitsyn_ 14 12 4 4 4 6 6 4 4 4 6 6 4 6 */ +/*:ref: irc2pc_ 14 5 6 6 4 6 6 */ +/*:ref: bsynz_ 14 7 6 4 4 6 6 6 6 */ +/*:ref: deemp_ 14 2 6 4 */ +/*:ref: initpitsyn_ 14 0 */ +/*:ref: initbsynz_ 14 0 */ +/*:ref: initdeemp_ 14 0 */ +#endif + +/* Common Block Declarations */ + +extern struct { + integer order, lframe; + logical corrp; +} contrl_; + +#define contrl_1 contrl_ + +/* Table of constant values */ + +static real c_b2 = .7f; + +/* ***************************************************************** */ + +/* SYNTHS Version 54 */ + +/* $Log$ + * Revision 1.16 2004/06/26 03:50:14 markster + * Merge source cleanups (bug #1911) + * + * Revision 1.15 2003/09/27 02:45:37 markster + * Fix various compiler warnings (bug #322) + * + * Revision 1.2 2003/09/27 02:45:37 markster + * Fix various compiler warnings (bug #322) + * + * 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 20:42:59 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 22:30:33 jaf + * Initial revision + * */ +/* Revision 1.5 1996/03/26 19:31:58 jaf */ +/* Commented out trace statements. */ + +/* Revision 1.4 1996/03/25 19:41:01 jaf */ +/* Changed so that MAXFRM samples are always returned in the output array */ +/* SPEECH. */ + +/* This required delaying the returned samples by MAXFRM sample times, */ +/* and remembering any "left over" samples returned by PITSYN from one */ +/* call of SYNTHS to the next. */ + +/* Changed size of SPEECH from 2*MAXFRM to MAXFRM. Removed local */ +/* variable SOUT. Added local state variables BUF and BUFLEN. */ + +/* Revision 1.3 1996/03/25 19:20:10 jaf */ +/* Added comments about the range of possible return values for argument */ +/* K, and increased the size of the arrays filled in by PITSYN from 11 to */ +/* 16, as has been already done inside of PITSYN. */ + +/* Revision 1.2 1996/03/22 00:18:18 jaf */ +/* Added comments explaining meanings of input and output parameters, and */ +/* indicating which array indices can be read or written. */ + +/* Added entry INITSYNTHS, which does nothing except call the */ +/* corresponding initialization entries for subroutines PITSYN, BSYNZ, */ +/* and DEEMP. */ + +/* Revision 1.1 1996/02/07 14:49:44 jaf */ +/* Initial revision */ + + +/* ***************************************************************** */ + +/* The note below is from the distributed version of the LPC10 coder. */ +/* The version of the code below has been modified so that SYNTHS always */ +/* has a constant frame length output of MAXFRM. */ + +/* Also, BSYNZ and DEEMP need not be modified to work on variable */ +/* positions within an array. It is only necessary to pass the first */ +/* index desired as the array argument. What actually gets passed is the */ +/* address of that array position, which the subroutine treats as the */ +/* first index of the array. */ + +/* This technique is used in subroutine ANALYS when calling PREEMP, so it */ +/* appears that multiple people wrote different parts of this LPC10 code, */ +/* and that they didn't necessarily have equivalent knowledge of Fortran */ +/* (not surprising). */ + +/* NOTE: There is excessive buffering here, BSYNZ and DEEMP should be */ +/* changed to operate on variable positions within SOUT. Also, */ +/* the output length parameter is bogus, and PITSYN should be */ +/* rewritten to allow a constant frame length output. */ + +/* Input: */ +/* VOICE - Half frame voicing decisions */ +/* Indices 1 through 2 read. */ +/* Input/Output: */ +/* PITCH - Pitch */ +/* PITCH is restricted to range 20 to 156, inclusive, */ +/* before calling subroutine PITSYN, and then PITSYN */ +/* can modify it further under some conditions. */ +/* RMS - Energy */ +/* Only use is for debugging, and passed to PITSYN. */ +/* See comments there for how it can be modified. */ +/* RC - Reflection coefficients */ +/* Indices 1 through ORDER restricted to range -.99 to .99, */ +/* before calling subroutine PITSYN, and then PITSYN */ +/* can modify it further under some conditions. */ +/* Output: */ +/* SPEECH - Synthesized speech samples. */ +/* Indices 1 through the final value of K are written. */ +/* K - Number of samples placed into array SPEECH. */ +/* This is always MAXFRM. */ + +/* Subroutine */ int synths_(integer *voice, integer *pitch, real * + rms, real *rc, real *speech, integer *k, struct lpc10_decoder_state *st) +{ + /* Initialized data */ + + real *buf; + integer *buflen; + + /* System generated locals */ + integer i__1; + real r__1, r__2; + + /* Local variables */ + real rmsi[16]; + integer nout, ivuv[16], i__, j; + extern /* Subroutine */ int deemp_(real *, integer *, struct lpc10_decoder_state *); + real ratio; + integer ipiti[16]; + real g2pass; + real pc[10]; + extern /* Subroutine */ int pitsyn_(integer *, integer *, integer *, real + *, real *, integer *, integer *, integer *, real *, real *, + integer *, real *, struct lpc10_decoder_state *); + real rci[160] /* was [10][16] */; + +/* $Log$ + * Revision 1.16 2004/06/26 03:50:14 markster + * Merge source cleanups (bug #1911) + * + * Revision 1.15 2003/09/27 02:45:37 markster + * Fix various compiler warnings (bug #322) + * + * Revision 1.2 2003/09/27 02:45:37 markster + * Fix various compiler warnings (bug #322) + * + * 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 20:42:59 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 22:30:33 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 1.16 2004/06/26 03:50:14 markster + * Merge source cleanups (bug #1911) + * + * Revision 1.15 2003/09/27 02:45:37 markster + * Fix various compiler warnings (bug #322) + * + * Revision 1.2 2003/09/27 02:45:37 markster + * Fix various compiler warnings (bug #322) + * + * 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 20:42:59 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 22:30:33 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 */ +/* Local state */ +/* BUF is a buffer of speech samples that would have been returned +*/ +/* by the older version of SYNTHS, but the newer version doesn't, */ +/* so that the newer version can always return MAXFRM samples on */ +/* every call. This has the effect of delaying the return of */ +/* samples for one additional frame time. */ + +/* Indices 1 through BUFLEN contain samples that are left over from +*/ +/* the last call to SYNTHS. Given the way that PITSYN works, */ +/* BUFLEN should always be in the range MAXFRM-MAXPIT+1 through */ +/* MAXFRM, inclusive, after a call to SYNTHS is complete. */ + +/* On the first call to SYNTHS (or the first call after */ +/* reinitializing with the entry INITSYNTHS), BUFLEN is MAXFRM, and +*/ +/* a frame of silence is always returned. */ + /* Parameter adjustments */ + if (voice) { + --voice; + } + if (rc) { + --rc; + } + if (speech) { + --speech; + } + + /* Function Body */ + buf = &(st->buf[0]); + buflen = &(st->buflen); + +/* Computing MAX */ + i__1 = min(*pitch,156); + *pitch = max(i__1,20); + i__1 = contrl_1.order; + for (i__ = 1; i__ <= i__1; ++i__) { +/* Computing MAX */ +/* Computing MIN */ + r__2 = rc[i__]; + r__1 = min(r__2,.99f); + rc[i__] = max(r__1,-.99f); + } + pitsyn_(&contrl_1.order, &voice[1], pitch, rms, &rc[1], &contrl_1.lframe, + ivuv, ipiti, rmsi, rci, &nout, &ratio, st); + if (nout > 0) { + i__1 = nout; + for (j = 1; j <= i__1; ++j) { + +/* Add synthesized speech for pitch period J to the en +d of */ +/* BUF. */ + + irc2pc_(&rci[j * 10 - 10], pc, &contrl_1.order, &c_b2, &g2pass); + bsynz_(pc, &ipiti[j - 1], &ivuv[j - 1], &buf[*buflen], &rmsi[j - 1] + , &ratio, &g2pass, st); + deemp_(&buf[*buflen], &ipiti[j - 1], st); + *buflen += ipiti[j - 1]; + } + +/* Copy first MAXFRM samples from BUF to output array SPEECH +*/ +/* (scaling them), and then remove them from the beginning of + */ +/* BUF. */ + + for (i__ = 1; i__ <= 180; ++i__) { + speech[i__] = buf[i__ - 1] / 4096.f; + } + *k = 180; + *buflen += -180; + i__1 = *buflen; + for (i__ = 1; i__ <= i__1; ++i__) { + buf[i__ - 1] = buf[i__ + 179]; + } + } + return 0; +} /* synths_ */ |