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257 lines
7.2 KiB
C
257 lines
7.2 KiB
C
/*
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$Log$
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Revision 1.18 2004/08/31 13:32:11 markster
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Merge NetBSD and Courtesty tone with modifications (bug #2329)
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Revision 1.17 2003/10/26 18:50:49 markster
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Make it build and run on MacOS X
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Revision 1.3 2003/10/26 18:50:49 markster
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Make it build and run on MacOS X
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Revision 1.2 2003/04/23 19:13:35 markster
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More OpenBSD patches
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Revision 1.1.1.2 2003/03/16 22:37:30 matteo
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dom mar 16 23:37:23 CET 2003
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Revision 1.2 2003/03/16 16:09:48 markster
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Mere James's cleanups for fewer build warnings
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Revision 1.1 2000/01/05 00:20:06 markster
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Add broken lpc10 code... It's not too far from working I don't think...
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* Revision 1.1 1996/08/19 22:47:31 jaf
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* Initial revision
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*
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*/
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#ifndef __LPC10_H__
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#define __LPC10_H__
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#define P_R_O_T_O_T_Y_P_E_S
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#define LPC10_SAMPLES_PER_FRAME 180
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#define LPC10_BITS_IN_COMPRESSED_FRAME 54
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/*
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The "#if defined"'s in this file are by no means intended to be
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complete. They are what Nautilus uses, which has been successfully
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compiled under DOS with the Microsoft C compiler, and under a few
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versions of Unix with the GNU C compiler.
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*/
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#if defined(unix) || defined(__unix__) || defined(__NetBSD__)
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typedef short INT16;
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typedef int INT32;
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#endif
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#if defined(__MSDOS__) || defined(MSDOS)
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typedef int INT16;
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typedef long INT32;
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#endif
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#if defined(__APPLE__)
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typedef short INT16;
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typedef int INT32;
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#endif
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#if defined(WIN32) && defined(_MSC_VER)
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typedef __int16 INT16;
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typedef __int32 INT32;
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#pragma warning(disable: 4005)
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#endif
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/* The initial values for every member of this structure is 0, except
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where noted in comments. */
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/* These two lines are copied from f2c.h. There should be a more
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elegant way of doing this than having the same declarations in two
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files. */
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typedef float real;
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typedef INT32 integer;
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typedef INT32 logical;
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typedef INT16 shortint;
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struct lpc10_encoder_state {
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/* State used only by function hp100 */
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real z11;
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real z21;
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real z12;
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real z22;
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/* State used by function analys */
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real inbuf[540], pebuf[540];
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real lpbuf[696], ivbuf[312];
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real bias;
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integer osbuf[10]; /* no initial value necessary */
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integer osptr; /* initial value 1 */
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integer obound[3];
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integer vwin[6] /* was [2][3] */; /* initial value vwin[4] = 307; vwin[5] = 462; */
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integer awin[6] /* was [2][3] */; /* initial value awin[4] = 307; awin[5] = 462; */
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integer voibuf[8] /* was [2][4] */;
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real rmsbuf[3];
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real rcbuf[30] /* was [10][3] */;
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real zpre;
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/* State used by function onset */
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real n;
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real d__; /* initial value 1.f */
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real fpc; /* no initial value necessary */
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real l2buf[16];
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real l2sum1;
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integer l2ptr1; /* initial value 1 */
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integer l2ptr2; /* initial value 9 */
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integer lasti; /* no initial value necessary */
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logical hyst; /* initial value FALSE_ */
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/* State used by function voicin */
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real dither; /* initial value 20.f */
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real snr;
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real maxmin;
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real voice[6] /* was [2][3] */; /* initial value is probably unnecessary */
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integer lbve, lbue, fbve, fbue;
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integer ofbue, sfbue;
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integer olbue, slbue;
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/* Initial values:
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lbve = 3000;
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fbve = 3000;
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fbue = 187;
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ofbue = 187;
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sfbue = 187;
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lbue = 93;
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olbue = 93;
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slbue = 93;
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snr = (real) (fbve / fbue << 6);
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*/
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/* State used by function dyptrk */
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real s[60];
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integer p[120] /* was [60][2] */;
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integer ipoint;
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real alphax;
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/* State used by function chanwr */
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integer isync;
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};
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struct lpc10_decoder_state {
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/* State used by function decode */
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integer iptold; /* initial value 60 */
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logical first; /* initial value TRUE_ */
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integer ivp2h;
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integer iovoic;
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integer iavgp; /* initial value 60 */
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integer erate;
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integer drc[30] /* was [3][10] */;
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integer dpit[3];
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integer drms[3];
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/* State used by function synths */
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real buf[360];
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integer buflen; /* initial value 180 */
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/* State used by function pitsyn */
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integer ivoico; /* no initial value necessary as long as first_pitsyn is initially TRUE_ */
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integer ipito; /* no initial value necessary as long as first_pitsyn is initially TRUE_ */
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real rmso; /* initial value 1.f */
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real rco[10]; /* no initial value necessary as long as first_pitsyn is initially TRUE_ */
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integer jsamp; /* no initial value necessary as long as first_pitsyn is initially TRUE_ */
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logical first_pitsyn; /* initial value TRUE_ */
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/* State used by function bsynz */
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integer ipo;
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real exc[166];
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real exc2[166];
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real lpi1;
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real lpi2;
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real lpi3;
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real hpi1;
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real hpi2;
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real hpi3;
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real rmso_bsynz;
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/* State used by function random */
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integer j; /* initial value 2 */
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integer k; /* initial value 5 */
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shortint y[5]; /* initial value { -21161,-8478,30892,-10216,16950 } */
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/* State used by function deemp */
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real dei1;
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real dei2;
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real deo1;
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real deo2;
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real deo3;
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};
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/*
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Calling sequence:
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Call create_lpc10_encoder_state(), which returns a pointer to an
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already initialized lpc10_encoder_state structure.
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lpc10_encode reads indices 0 through (LPC10_SAMPLES_PER_FRAME-1) of
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array speech[], and writes indices 0 through
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(LPC10_BITS_IN_COMPRESSED_FRAME-1) of array bits[], and both reads
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and writes the lpc10_encoder_state structure contents. The
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lpc10_encoder_state structure should *not* be initialized for every
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frame of encoded speech. Once at the beginning of execution, done
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automatically for you by create_lpc10_encoder_state(), is enough.
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init_lpc10_encoder_state() reinitializes the lpc10_encoder_state
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structure. This might be useful if you are finished processing one
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sound sample, and want to reuse the same lpc10_encoder_state
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structure to process another sound sample. There might be other
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uses as well.
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Note that the comments in the lpc10/lpcenc.c file imply that indices
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1 through 180 of array speech[] are read. These comments were
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written for the Fortran version of the code, before it was
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automatically converted to C by the conversion program f2c. f2c
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seems to use the convention that the pointers to arrays passed as
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function arguments point to the first index used in the Fortran
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code, whatever index that might be (usually 1), and then it modifies
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the pointer inside of the function, like so:
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if (speech) {
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--speech;
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}
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So that the code can access the first value at index 1 and the last
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at index 180. This makes the translated C code "closer" to the
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original Fortran code.
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The calling sequence for the decoder is similar to the encoder. The
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only significant difference is that the array bits[] is read
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(indices 0 through (LPC10_BITS_IN_COMPRESSED_FRAME-1)), and the
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array speech[] is written (indices 0 through
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(LPC10_SAMPLES_PER_FRAME-1)).
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*/
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struct lpc10_encoder_state * create_lpc10_encoder_state (void);
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void init_lpc10_encoder_state (struct lpc10_encoder_state *st);
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int lpc10_encode (real *speech, INT32 *bits, struct lpc10_encoder_state *st);
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struct lpc10_decoder_state * create_lpc10_decoder_state (void);
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void init_lpc10_decoder_state (struct lpc10_decoder_state *st);
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int lpc10_decode (INT32 *bits, real *speech, struct lpc10_decoder_state *st);
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#endif /* __LPC10_H__ */
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