/* * gen.h -- generate different test signals * * Copyright (C) 1997 * Thomas Sailer (sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* ---------------------------------------------------------------------- */ #define SAMPLE_RATE 22050 #define MS(x) ((float)(x)*SAMPLE_RATE/1000) extern const int costabi[0x400]; #define COS(x) costabi[(((x)>>6)&0x3ffu)] enum gen_type { gentype_dtmf, gentype_sine, gentype_zvei, gentype_hdlc }; struct gen_params { enum gen_type type; int ampl; union { struct { int duration; int pause; char str[256]; } dtmf; struct { int duration; int freq; } sine; struct { int duration; int pause; char str[256]; } zvei; struct { int modulation; int txdelay; int pktlen; unsigned char pkt[256]; } hdlc; } p; }; struct gen_state { union { struct { int ch_idx; int ph_row, ph_col, phinc_row, phinc_col; int time, time2; } dtmf; struct { int ph, phinc; int time; } sine; struct { int ch_idx; int ph, phinc; int time, time2; } zvei; struct { int lastb; int ch_idx, bitmask; unsigned int ph, phinc, bitph; unsigned int datalen; unsigned char data[512]; } hdlc; } s; }; extern void gen_init_dtmf(struct gen_params *p, struct gen_state *s); extern int gen_dtmf(signed short *buf, int buflen, struct gen_params *p, struct gen_state *s); extern void gen_init_sine(struct gen_params *p, struct gen_state *s); extern int gen_sine(signed short *buf, int buflen, struct gen_params *p, struct gen_state *s); extern void gen_init_zvei(struct gen_params *p, struct gen_state *s); extern int gen_zvei(signed short *buf, int buflen, struct gen_params *p, struct gen_state *s); extern void gen_init_hdlc(struct gen_params *p, struct gen_state *s); extern int gen_hdlc(signed short *buf, int buflen, struct gen_params *p, struct gen_state *s);
