i've tested, now you can too

2026-07-24 21:22:09 +00:00 · 2012-12-20 20:08:42 -06:00
parent d3fcfa8245
commit d67b96af8a
94 changed files with 25305 additions and 2005 deletions
@@ -0,0 +1,112 @@
+/*---------------------------------------------------------------------------*\
+                                                                             
+  FILE........: fdmdv_put_test_bits.c
+  AUTHOR......: David Rowe  
+  DATE CREATED: 1 May 2012
+                                                                             
+  Using a file of packed test bits as input, determines bit error
+  rate.  Useful for testing fdmdv_demod.
+
+\*---------------------------------------------------------------------------*/
+
+
+/*
+  Copyright (C) 2012 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 "fdmdv.h"
+
+#define BITS_PER_CODEC_FRAME (2*FDMDV_BITS_PER_FRAME)
+#define BYTES_PER_CODEC_FRAME (BITS_PER_CODEC_FRAME/8)
+
+int main(int argc, char *argv[])
+{
+    FILE         *fin;
+    struct FDMDV *fdmdv;
+    char          packed_bits[BYTES_PER_CODEC_FRAME];
+    int           rx_bits[2*FDMDV_BITS_PER_FRAME];
+    int           i, bit, byte;
+    int           test_frame_sync, bit_errors, total_bit_errors, total_bits, ntest_bits;
+
+    if (argc < 2) {
+	printf("usage: %s InputBitFile\n", argv[0]);
+	printf("e.g    %s test.c2\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 bit file: %s: %s.\n",
+         argv[1], strerror(errno));
+	exit(1);
+    }
+
+    fdmdv = fdmdv_create();
+    total_bit_errors = 0;
+    total_bits = 0;
+
+    while(fread(packed_bits, sizeof(char), BYTES_PER_CODEC_FRAME, fin) == BYTES_PER_CODEC_FRAME) {
+	/* unpack bits, MSB first */
+
+	bit = 7; byte = 0;
+	for(i=0; i<BITS_PER_CODEC_FRAME; i++) {
+	    rx_bits[i] = (packed_bits[byte] >> bit) & 0x1;
+	    //printf("%d 0x%x %d\n", i, packed_bits[byte], rx_bits[i]);
+	    bit--;
+	    if (bit < 0) {
+		bit = 7;
+		byte++;
+	    }
+	}
+	assert(byte == BYTES_PER_CODEC_FRAME);
+
+	fdmdv_put_test_bits(fdmdv, &test_frame_sync, &bit_errors, &ntest_bits, rx_bits);
+	if (test_frame_sync == 1) {
+	    total_bit_errors += bit_errors;
+	    total_bits = total_bits + ntest_bits;
+	    printf("+");
+	}
+	else
+	    printf("-");
+  	fdmdv_put_test_bits(fdmdv, &test_frame_sync, &bit_errors, &ntest_bits, &rx_bits[FDMDV_BITS_PER_FRAME]);
+	if (test_frame_sync == 1) {
+	    total_bit_errors += bit_errors;
+	    total_bits = total_bits + ntest_bits;
+	    printf("+");
+	}
+	else
+	    printf("-");
+	
+	/* if this is in a pipeline, we probably don't want the usual
+	   buffering to occur */
+
+        if (fin == stdin) fflush(stdin);
+    }
+
+    fclose(fin);
+    fdmdv_destroy(fdmdv);
+
+    printf("\nbits %d  errors %d  BER %1.4f\n", total_bits, total_bit_errors, (float)total_bit_errors/(1E-6+total_bits) );
+    return 0;
+}
+