TT#136957 move rand_code from _send to _recv

The `dtmf_send` event might not have a matching entry while handling a
received DTMF event. Move bookkeeping of the random output event into
`dtmf_recv`.

Change-Id: I5507b0b7f5eca6e29cbcaccc905ab25249b22aa3

daemon/codec.c

@@ -2649,6 +2649,7 @@ static void delay_frame_manipulate(struct delay_frame *dframe) {
 	switch (mode) {
 		case BLOCK_DTMF_OFF:
 			// DTMF delay mode: play original DTMF
+			// `dtmf_send` is valid ONLY HERE
 			if (dframe->ch->handler->real_dtmf_payload_type != -1) {
 				// add event to handler queue so the packet can be translated
 				// to DTMF event packet.
@@ -2700,7 +2701,7 @@ static void delay_frame_manipulate(struct delay_frame *dframe) {
 			break;
 		case BLOCK_DTMF_RANDOM:
 			frame_fill_dtmf_samples(frame->format, frame->extended_data[0], dframe->ts,
-					frame->nb_samples, dtmf_send->rand_code - '0',
+					frame->nb_samples, dtmf_recv->rand_code - '0',
 					10, frame->sample_rate,
 					GET_CHANNELS(frame));
 			break;

daemon/dtmf.c

@@ -281,14 +281,14 @@ static void dtmf_code_event(struct call_media *media, char event, uint64_t ts, i
 	dtmf_check_trigger(media, event, ts, clockrate);
 
 	ev = g_slice_alloc0(sizeof(*ev));
-	*ev = (struct dtmf_event) { .code = event, .ts = ts, .volume = volume };
+	*ev = (struct dtmf_event) { .code = event, .ts = ts, .volume = volume,
+		.rand_code = '0' + (ssl_random() % 10) };
 	g_queue_push_tail(&media->dtmf_recv, ev);
 
 	ev = g_slice_alloc0(sizeof(*ev));
 	*ev = (struct dtmf_event) { .code = event, .ts = ts + media->monologue->dtmf_delay * clockrate / 1000,
 		.volume = volume,
-		.block_dtmf = media->monologue->block_dtmf,
-		.rand_code = '0' + (ssl_random() % 10) };
+		.block_dtmf = media->monologue->block_dtmf };
 	g_queue_push_tail(&media->dtmf_send, ev);
 }