Move samples of int16_t format to sample_t, that is of type double

This prepares the correction of all levels

src/test/test_compandor.c

@@ -2,6 +2,7 @@
 #include <stdint.h>
 #include <math.h>
 #include <string.h>
+#include "../common/sample.h"
 #include "../common/compandor.h"
 
 #define level2db(level)		(20 * log10(level))
@@ -14,11 +15,11 @@
 
 static double test_frequency[3] = { 2000.0, 4000.0, 1000.0 };
 
-static int16_t samples_4db[SAMPLERATE];
-static int16_t samples_16db[SAMPLERATE];
-static int16_t samples_2db[SAMPLERATE];
-static int16_t samples_8db[SAMPLERATE];
-static int16_t samples_0db[SAMPLERATE];
+static sample_t samples_4db[SAMPLERATE];
+static sample_t samples_16db[SAMPLERATE];
+static sample_t samples_2db[SAMPLERATE];
+static sample_t samples_8db[SAMPLERATE];
+static sample_t samples_0db[SAMPLERATE];
 
 /* generate 2 samples: one with -4 dB, the other with -16 dB */
 static void generate_test_sample(double test_frequency)
@@ -36,7 +37,7 @@ static void generate_test_sample(double test_frequency)
 	}
 }
 
-static void check_level(int16_t *samples, double duration, const char *desc, double target_db)
+static void check_level(sample_t *samples, double duration, const char *desc, double target_db)
 {
 	int i;
 	int last = 0, envelop = 0;
@@ -67,7 +68,7 @@ static void check_level(int16_t *samples, double duration, const char *desc, dou
 int main(void)
 {
 	compandor_t cstate;
-	int16_t samples[SAMPLERATE * 2];
+	sample_t samples[SAMPLERATE * 2];
 	int f;
 
 	init_compandor(&cstate, SAMPLERATE, ATTACK_MS, RECOVERY_MS, UNAFFECTED);

src/test/test_dms.c

@@ -4,6 +4,7 @@
 #include <math.h>
 #include <string.h>
 #include <unistd.h>
+#include "../common/sample.h"
 #include "../common/debug.h"
 #include "../common/timer.h"
 #include "../nmt/nmt.h"
@@ -55,7 +56,7 @@ void dms_all_sent(nmt_t *nmt)
 }
 
 /* receive bits from DMS */
-int fsk_render_frame(nmt_t *nmt, const char *frame, int length, int16_t *sample)
+int fsk_render_frame(nmt_t *nmt, const char *frame, int length, sample_t *sample)
 {
 	printf("(getting %d bits from DMS layer)\n", length);
 
@@ -92,7 +93,7 @@ int main(void)
 	nmt_t *nmt;
 	dms_t *dms;
 	int i, j;
-	int16_t sample = 0;
+	sample_t sample = 0;
 
 	debuglevel = DEBUG_DEBUG;
 	dms_allow_loopback = 1;

src/test/test_emphasis.c

@@ -2,6 +2,7 @@
 #include <stdint.h>
 #include <math.h>
 #include <string.h>
+#include "../common/sample.h"
 #include "../common/emphasis.h"
 #include "../common/debug.h"
 
@@ -13,7 +14,7 @@
 
 static double test_freq[] = { 25, 50, 100, 200, 250, 300, 400, 500, 1000, 2000, 4000, 0 };
 
-static void check_level(int16_t *samples, double freq, const char *desc)
+static void check_level(sample_t *samples, double freq, const char *desc)
 {
 	int i;
 	int last = 0, envelope = 0;
@@ -34,7 +35,7 @@ static void check_level(int16_t *samples, double freq, const char *desc)
 	printf("%s: f = %.0f envelop = %.4f\n", desc, freq, level2db((double)envelope / DEVIATION));
 }
 
-static void gen_samples(int16_t *samples, double freq)
+static void gen_samples(double *samples, double freq)
 {
 	int i;
 	double value;
@@ -48,7 +49,7 @@ static void gen_samples(int16_t *samples, double freq)
 int main(void)
 {
 	emphasis_t estate;
-	int16_t samples[SAMPLERATE];
+	double samples[SAMPLERATE];
 	int i;
 
 	debuglevel = DEBUG_DEBUG;

src/test/test_filter.c

@@ -2,6 +2,7 @@
 #include <stdint.h>
 #include <math.h>
 #include <string.h>
+#include "../common/sample.h"
 #include "../common/filter.h"
 #include "../common/debug.h"
 

src/test/test_sms.c

@@ -4,6 +4,7 @@
 #include <math.h>
 #include <string.h>
 #include <unistd.h>
+#include "../common/sample.h"
 #include "../common/debug.h"
 #include "../common/timer.h"
 #include "../nmt/nmt.h"