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Diffstat (limited to 'src/fmfsk_demod.c')
| -rw-r--r-- | src/fmfsk_demod.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/src/fmfsk_demod.c b/src/fmfsk_demod.c deleted file mode 100644 index 5b12fc1..0000000 --- a/src/fmfsk_demod.c +++ /dev/null @@ -1,150 +0,0 @@ -/*---------------------------------------------------------------------------*\ - - FILE........: fsk_demod.c - AUTHOR......: Brady O'Brien - DATE CREATED: 8 January 2016 - - C test driver for fsk_demod in fsk.c. Reads in a stream of 32 bit cpu endian - floats and writes out the detected bits - - -\*---------------------------------------------------------------------------*/ - -/* - Copyright (C) 2016 David Rowe - - All rights reserved. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU Lesser General Public License version 2.1, as - published by the Free Software Foundation. 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 Lesser General Public License - along with this program; if not, see <http://www.gnu.org/licenses/>. -*/ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "fmfsk.h" -#include "modem_stats.h" -#define MODEMPROBE_ENABLE -#include "modem_probe.h" -#include "codec2_fdmdv.h" - -int main(int argc,char *argv[]){ - struct FMFSK *fmfsk; - int Fs,Rb; - struct MODEM_STATS stats; - float loop_time; - int enable_stats = 0; - int stats_ctr = 0; - int stats_loop = 0; - FILE *fin,*fout; - uint8_t *bitbuf; - int16_t *rawbuf; - float *modbuf; - int i,j,t; - - if(argc<4){ - fprintf(stderr,"usage: %s SampleFreq BitRate InputModemRawFile OutputOneBitPerCharFile [S]\n",argv[0]); - exit(1); - } - - /* Extract parameters */ - Fs = atoi(argv[1]); - Rb = atoi(argv[2]); - - /* Open files */ - if(strcmp(argv[3],"-")==0){ - fin = stdin; - }else{ - fin = fopen(argv[3],"r"); - } - - if(strcmp(argv[4],"-")==0){ - fout = stdout; - }else{ - fout = fopen(argv[4],"w"); - } - - /* set up FSK */ - fmfsk = fmfsk_create(Fs,Rb); - - if(argc>5){ - if(strcmp(argv[5],"S")==0){ - enable_stats = 1; - loop_time = ((float)fmfsk_nin(fmfsk))/((float)Fs); - stats_loop = (int)(.125/loop_time); - stats_ctr = 0; - } - } - - if(fin==NULL || fout==NULL || fmfsk==NULL){ - fprintf(stderr,"Couldn't open test vector files\n"); - exit(1); - } - - /* allocate buffers for processing */ - bitbuf = (uint8_t*)malloc(sizeof(uint8_t)*fmfsk->nbit); - rawbuf = (int16_t*)malloc(sizeof(int16_t)*(fmfsk->N+fmfsk->Ts*2)); - modbuf = (float*)malloc(sizeof(float)*(fmfsk->N+fmfsk->Ts*2)); - - /* Demodulate! */ - while( fread(rawbuf,sizeof(int16_t),fmfsk_nin(fmfsk),fin) == fmfsk_nin(fmfsk) ){ - for(i=0;i<fmfsk_nin(fmfsk);i++){ - modbuf[i] = ((float)rawbuf[i])/FDMDV_SCALE; - } - - modem_probe_samp_f("t_d_sampin",modbuf,fmfsk_nin(fmfsk)); - fmfsk_demod(fmfsk,bitbuf,modbuf); - - for(i=0;i<fmfsk->nbit;i++){ - t = (int)bitbuf[i]; - modem_probe_samp_i("t_d_bitout",&t,1); - } - - fwrite(bitbuf,sizeof(uint8_t),fmfsk->nbit,fout); - - if(enable_stats && stats_ctr <= 0){ - fmfsk_get_demod_stats(fmfsk,&stats); - fprintf(stderr,"{\"EbNodB\": %2.2f,\t\"ppm\": %d,",stats.snr_est,(int)stats.clock_offset); - fprintf(stderr,"\t\"f1_est\":%.1f,\t\"f2_est\":%.1f",0.0,0.0); - fprintf(stderr,",\t\"eye_diagram\":["); - for(i=0;i<stats.neyetr;i++){ - fprintf(stderr,"["); - for(j=0;j<stats.neyesamp;j++){ - fprintf(stderr,"%f",stats.rx_eye[i][j]); - if(j<stats.neyesamp-1) fprintf(stderr,","); - } - fprintf(stderr,"]"); - if(i<stats.neyetr-1) fprintf(stderr,","); - } - - fprintf(stderr,"]}\n"); - stats_ctr = stats_loop; - } - stats_ctr--; - - if (fout == stdin) { - fflush(fout); - } - } - - modem_probe_close(); - - free(modbuf); - free(rawbuf); - free(bitbuf); - - fclose(fin); - fclose(fout); - fmfsk_destroy(fmfsk); - - exit(0); -} - |