Add clock function to call interface

Implementations will have a clock to play tones, if no clock is
available from a transceiver.

src/amps/amps.c

@@ -1076,6 +1076,8 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 /* Timeout handling */
 void transaction_timeout(struct timer *timer)
 {

src/anetz/anetz.c

@@ -540,5 +540,7 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 void dump_info(void) {}
 

src/bnetz/bnetz.c

@@ -862,5 +862,7 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 void dump_info(void) {}
 

src/cnetz/cnetz.c

@@ -560,6 +560,8 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 int call_down_setup(int callref, const char __attribute__((unused)) *caller_id, enum number_type __attribute__((unused)) caller_type, const char *dialing)
 {
 	sender_t *sender;

src/eurosignal/dsp.c

@@ -265,13 +265,6 @@ void sender_receive(sender_t *sender, sample_t *samples, int length, double __at
 
 	if (euro->rx)
 		tone_decode(euro, down, count);
-
-	/* whenever a chunk of anouncement audio should be played toward caller */
-	euro->chunk_count += count;
-	if (euro->chunk_count >= 160) {
-		euro->chunk_count -= 160;
-		euro_clock_chunk(sender);
-	}
 }
 
 /* Generate tone of paging digits. */

src/eurosignal/eurosignal.c

@@ -525,13 +525,13 @@ static void call_play_beep(euro_call_t *call)
 }
 
 /* loop through all calls and play the announcement */
-void euro_clock_chunk(sender_t *sender)
+void call_down_clock(void)
 {
+	sender_t *sender;
 	euro_t *euro;
 	euro_call_t *call;
 
-	if (sender == sender_head) {
-		/* use first tranceiver clock to clock calls without a transceiver */
+	/* clock all calls without a transceiver */
 	for (call = ooo_call_list; call; call = call->next) {
 		/* no callref */
 		if (!call->callref)
@@ -542,7 +542,9 @@ void euro_clock_chunk(sender_t *sender)
 		else
 			call_play_announcement(call);
 	}
-	}
+
+	/* clock all calls that have a transceiver */
+	for (sender = sender_head; sender; sender = sender->next) {
 		euro = (euro_t *) sender;
 		for (call = euro->call_list; call; call = call->next) {
 			/* no callref */
@@ -552,6 +554,7 @@ void euro_clock_chunk(sender_t *sender)
 			call_play_announcement(call);
 		}
 	}
+}
 
 /* Timeout handling */
 static void call_timeout(struct timer *timer)

src/eurosignal/eurosignal.h

@@ -67,7 +67,6 @@ typedef struct eurosignal {
 	double			tx_time;		/* current elapsed time of tone */
 	char			tx_digits[7];		/* current ID beeing transmitted */
 	int			tx_digit_index;		/* current digit beein transmitted */
-	int			chunk_count;		/* current elapsed sample of 20ms audio chunk */
 	fm_demod_t		rx_demod;		/* demodulator for frequency */
 	iir_filter_t		rx_lp;			/* low pass to filter the frequency result */
 	int			rx_digit_count;		/* count the tone until detected */
@@ -87,5 +86,4 @@ int euro_create(const char *kanal, const char *audiodev, int use_sdr, int sample
 void euro_destroy(sender_t *sender);
 void euro_get_id(euro_t *euro, char *id);
 void euro_receive_id(euro_t *euro, char *id);
-void euro_clock_chunk(sender_t *sender);
 

src/imts/imts.c

@@ -1322,5 +1322,7 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 void dump_info(void) {}
 

src/jolly/jolly.c

@@ -632,5 +632,7 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 void dump_info(void) {}
 

src/libmobile/call.c

@@ -586,6 +586,8 @@ void call_clock(void)
 	uint8_t buf[sizeof(struct gsm_data_frame) + 160 * sizeof(int16_t)];
 	struct gsm_data_frame *data = (struct gsm_data_frame *)buf;
 
+	call_down_clock();
+
 	while(process) {
 		if (process->pattern != PATTERN_NONE) {
 			data->msg_type = ANALOG_8000HZ;

src/libmobile/call.h

@@ -36,5 +36,6 @@ void call_up_audio(int callref, sample_t *samples, int count);
 void call_down_audio(int callref, sample_t *samples, int count);
 
 /* clock to transmit to */
-void call_clock(void);
+void call_clock(void); /* from main loop */
+void call_down_clock(void); /* towards mobile implementation */
 

src/nmt/nmt.c

@@ -1905,6 +1905,8 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 /*
  * SMS layer messages
  */

src/r2000/r2000.c

@@ -1582,5 +1582,7 @@ void call_down_audio(int callref, sample_t *samples, int count)
 	}
 }
 
+void call_down_clock(void) {}
+
 void dump_info(void) {}
 

src/test/test_dms.c

@@ -253,5 +253,7 @@ int main(void)
 	return 0;
 }
 
+void call_down_clock(void) {}
+
 void print_image(void) {}
 

src/test/test_sms.c

@@ -162,5 +162,7 @@ int main(void)
 	return 0;
 }
 
+void call_down_clock(void) {}
+
 void print_image(void) {}