postfilter.c
sine.c
codec2.c
+ cohpsk.c
fifo.c
fdmdv.c
fm.c
golay23.h
codec2.h
codec2_fdmdv.h
+ codec2_cohpsk.h
codec2_fm.h
codec2_fifo.h
comp.h
add_executable(fm_demod fm_demod.c fm.c)
target_link_libraries(fm_demod ${CMAKE_REQUIRED_LIBRARIES})
+add_executable(cohpsk_mod cohpsk_mod.c)
+target_link_libraries(cohpsk_mod ${CMAKE_REQUIRED_LIBRARIES} codec2)
+
+add_executable(cohpsk_demod cohpsk_demod.c)
+target_link_libraries(cohpsk_demod ${CMAKE_REQUIRED_LIBRARIES} codec2)
+
+add_executable(cohpsk_get_test_bits cohpsk_get_test_bits.c)
+target_link_libraries(cohpsk_get_test_bits ${CMAKE_REQUIRED_LIBRARIES} codec2)
+
install(TARGETS codec2 EXPORT codec2-config
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
#ifndef __CODEC2_COHPSK__
#define __CODEC2_COHPSK__
-#define COHPSK_BITS_PER_FRAME 32 /* hard coded for now */
-#define COHPSK_NC 4 /* hard coded for now */
-#define COHPSK_SAMPLES_PER_FRAME (NSYMROWPILOT*M)
+#define COHPSK_BITS_PER_FRAME 32 /* hard coded for now */
+#define COHPSK_NC 4 /* hard coded for now */
+#define COHPSK_SAMPLES_PER_FRAME 960
#include "comp.h"
#include "codec2_fdmdv.h"
#include <math.h>
#include "codec2_cohpsk.h"
-#include "test_bits.h"
#include "cohpsk_defs.h"
#include "cohpsk_internal.h"
#include "fdmdv_internal.h"
int r,c,p,i;
float freq_hz;
+ assert(COHPSK_SAMPLES_PER_FRAME == M*NSYMROWPILOT);
+
coh = (struct COHPSK*)malloc(sizeof(struct COHPSK));
if (coh == NULL)
return NULL;
--- /dev/null
+/*---------------------------------------------------------------------------*\
+
+ FILE........: cohpsk_demod.c
+ AUTHOR......: David Rowe
+ DATE CREATED: April 6 2015
+
+ Given an input file of raw file (8kHz, 16 bit shorts) of COHPSK modem samples,
+ outputs a file of bits (note one bit per int, not compressed).
+
+\*---------------------------------------------------------------------------*/
+
+/*
+ Copyright (C) 2015 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, 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 <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <errno.h>
+
+#include "codec2_cohpsk.h"
+
+int main(int argc, char *argv[])
+{
+ FILE *fin, *fout;
+ struct COHPSK *cohpsk;
+ int rx_bits[COHPSK_BITS_PER_FRAME];
+ COMP rx_fdm[COHPSK_SAMPLES_PER_FRAME];
+ short rx_fdm_scaled[COHPSK_SAMPLES_PER_FRAME];
+ int frames, reliable_sync_bit;
+ int i;
+
+ if (argc < 3) {
+ printf("usage: %s InputModemRawFile OutputOneBitPerIntFile\n", argv[0]);
+ exit(1);
+ }
+
+ if (strcmp(argv[1], "-") == 0) fin = stdin;
+ else if ( (fin = fopen(argv[1],"rb")) == NULL ) {
+ fprintf(stderr, "Error opening input modem sample file: %s: %s.\n",
+ argv[1], strerror(errno));
+ exit(1);
+ }
+
+ if (strcmp(argv[2], "-") == 0) fout = stdout;
+ else if ( (fout = fopen(argv[2],"wb")) == NULL ) {
+ fprintf(stderr, "Error opening output file: %s: %s.\n",
+ argv[2], strerror(errno));
+ exit(1);
+ }
+
+ cohpsk = cohpsk_create();
+
+ frames = 0;
+
+ while(fread(rx_fdm_scaled, sizeof(short), COHPSK_SAMPLES_PER_FRAME, fin) == COHPSK_SAMPLES_PER_FRAME) {
+ frames++;
+
+ /* scale and demod */
+
+ for(i=0; i<COHPSK_SAMPLES_PER_FRAME; i++) {
+ rx_fdm[i].real = rx_fdm_scaled[i]/FDMDV_SCALE;
+ rx_fdm[i].imag = 0.0;
+ }
+
+ cohpsk_demod(cohpsk, rx_bits, &reliable_sync_bit, rx_fdm);
+
+ fwrite(rx_bits, sizeof(int), COHPSK_BITS_PER_FRAME, fout);
+
+ /* if this is in a pipeline, we probably don't want the usual
+ buffering to occur */
+
+ if (fout == stdout) fflush(stdout);
+ if (fin == stdin) fflush(stdin);
+ }
+
+ fclose(fin);
+ fclose(fout);
+ cohpsk_destroy(cohpsk);
+
+ return 0;
+}
--- /dev/null
+/*---------------------------------------------------------------------------*\
+
+ FILE........: cohpsk_put_test_bits.c
+ AUTHOR......: David Rowe
+ DATE CREATED: April 2015
+
+ Generates a file of test bits, useful for input to cohpsk_mod.
+
+\*---------------------------------------------------------------------------*/
+
+
+/*
+ Copyright (C) 2015 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, 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 <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <errno.h>
+
+#include "codec2_cohpsk.h"
+#include "test_bits_coh.h"
+
+int main(int argc, char *argv[])
+{
+ FILE *fout;
+ int tx_bits[COHPSK_BITS_PER_FRAME];
+ int numBits, nFrames, n;
+ int *ptest_bits_coh, *ptest_bits_coh_end;
+
+ if (argc < 2) {
+ printf("usage: %s OutputOneBitPerIntFile numBits\n", argv[0]);
+ exit(1);
+ }
+
+ if (strcmp(argv[1], "-") == 0) fout = stdout;
+ else if ( (fout = fopen(argv[1],"wb")) == NULL ) {
+ fprintf(stderr, "Error opening output file: %s: %s.\n",
+ argv[1], strerror(errno));
+ exit(1);
+ }
+
+ ptest_bits_coh = (int*)test_bits_coh;
+ ptest_bits_coh_end = (int*)test_bits_coh + sizeof(test_bits_coh)/sizeof(int);
+ numBits = atoi(argv[2]);
+ nFrames = numBits/COHPSK_BITS_PER_FRAME;
+
+ for(n=0; n<nFrames; n++) {
+
+ memcpy(tx_bits, ptest_bits_coh, sizeof(int)*COHPSK_BITS_PER_FRAME);
+ ptest_bits_coh += COHPSK_BITS_PER_FRAME;
+ if (ptest_bits_coh >= ptest_bits_coh_end) {
+ ptest_bits_coh = (int*)test_bits_coh;
+ }
+
+ fwrite(tx_bits, sizeof(int), COHPSK_BITS_PER_FRAME, fout);
+
+ /* if this is in a pipeline, we probably don't want the usual
+ buffering to occur */
+
+ if (fout == stdout) fflush(stdout);
+ }
+
+ fclose(fout);
+
+ return 0;
+}
+
--- /dev/null
+/*---------------------------------------------------------------------------*\
+
+ FILE........: cohpsk_mod.c
+ AUTHOR......: David Rowe
+ DATE CREATED: April 5 2015
+
+ Given an input file of bits (note one bit per int, not compressed),
+ outputs a raw file (8kHz, 16 bit shorts) of COHPSK modem samples
+ ready to send over a HF radio channel.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+ Copyright (C) 2015 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, 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 <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <errno.h>
+
+#include "codec2_cohpsk.h"
+
+int main(int argc, char *argv[])
+{
+ FILE *fin, *fout;
+ struct COHPSK *cohpsk;
+ int tx_bits[COHPSK_BITS_PER_FRAME];
+ COMP tx_fdm[COHPSK_SAMPLES_PER_FRAME];
+ short tx_fdm_scaled[COHPSK_SAMPLES_PER_FRAME];
+ int frames;
+ int i;
+
+ if (argc < 3) {
+ printf("usage: %s InputOneBitPerIntFile OutputModemRawFile\n", argv[0]);
+ exit(1);
+ }
+
+ if (strcmp(argv[1], "-") == 0) fin = stdin;
+ else if ( (fin = fopen(argv[1],"rb")) == NULL ) {
+ fprintf(stderr, "Error opening input file: %s: %s.\n",
+ argv[1], strerror(errno));
+ exit(1);
+ }
+
+ if (strcmp(argv[2], "-") == 0) fout = stdout;
+ else if ( (fout = fopen(argv[2],"wb")) == NULL ) {
+ fprintf(stderr, "Error opening output modem sample file: %s: %s.\n",
+ argv[2], strerror(errno));
+ exit(1);
+ }
+
+ cohpsk = cohpsk_create();
+
+ frames = 0;
+
+ while(fread(tx_bits, sizeof(int), COHPSK_BITS_PER_FRAME, fin) == COHPSK_BITS_PER_FRAME) {
+ frames++;
+
+ cohpsk_mod(cohpsk, tx_fdm, tx_bits);
+
+ /* scale and save to disk as shorts */
+
+ for(i=0; i<COHPSK_SAMPLES_PER_FRAME; i++)
+ tx_fdm_scaled[i] = FDMDV_SCALE * tx_fdm[i].real;
+
+ fwrite(tx_fdm_scaled, sizeof(short), COHPSK_SAMPLES_PER_FRAME, fout);
+
+ /* if this is in a pipeline, we probably don't want the usual
+ buffering to occur */
+
+ if (fout == stdout) fflush(stdout);
+ if (fin == stdin) fflush(stdin);
+ }
+
+ fclose(fin);
+ fclose(fout);
+ cohpsk_destroy(cohpsk);
+
+ return 0;
+}
projects / freetel-svn-tracking.git / commitdiff