applications: nrf5340_audio: Rail the presentation delay.

	Ensure the preferred presentation delay is within the range of the
	min and max delays, rail if not.
	Search for the presentation delay function updated to search over
	the end points for the direction.

Signed-off-by: Graham Wacey <[email protected]>

applications/nrf5340_audio/src/bluetooth/bt_stream/unicast/unicast_client.c

@@ -256,6 +256,18 @@ static int headset_pres_delay_find(uint8_t index, uint32_t *pres_dly_us)
 		}
 	}
 
+	if (pref_dly_min > pref_dly_max) {
+		LOG_ERR("Min pref delay, %d, greater than max pref delay, %d", pref_dly_min,
+			pref_dly_max);
+		return -ENOTSUP;
+	}
+
+	if (pres_dly_min > pres_dly_max) {
+		LOG_ERR("Max pref delay, %d, greater than max pres delay, %d", pres_dly_max,
+			pres_dly_max);
+		return -ENOTSUP;
+	}
+
 	if (IS_ENABLED(CONFIG_BT_AUDIO_PRES_DELAY_SRCH_MIN)) {
 		*pres_dly_us = pres_dly_min;
 
@@ -269,24 +281,31 @@ static int headset_pres_delay_find(uint8_t index, uint32_t *pres_dly_us)
 	}
 
 	if (IS_ENABLED(CONFIG_BT_AUDIO_PRES_DELAY_SRCH_PREF_MIN)) {
-		/* Preferred min is 0, so we set min supported */
-		if (pref_dly_min == 0) {
+		if (pref_dly_min == 0 || pref_dly_min < pres_dly_min) {
 			*pres_dly_us = pres_dly_min;
-		} else {
+		} else if (pref_dly_min <= pres_dly_max) {
 			*pres_dly_us = pref_dly_min;
+		} else {
+			LOG_ERR("Min pref delay, %d, greater than max pres delay, %d", pref_dly_min,
+				pres_dly_max);
+
+			return -ENOTSUP;
 		}
 
 		return 0;
 	}
 
 	if (IS_ENABLED(CONFIG_BT_AUDIO_PRES_DELAY_SRCH_PREF_MAX)) {
-		/* Preferred max is 0, so we set max supported */
-		if (pref_dly_max == 0) {
+		if (pref_dly_max == 0 || pref_dly_max > pres_dly_max) {
 			*pres_dly_us = pres_dly_max;
-		} else {
+		} else if (pref_dly_max < pres_dly_min) {
 			*pres_dly_us = pref_dly_max;
-		}
+		} else {
+			LOG_ERR("Max pref delay, %d, is less than min pres delay, %d", pref_dly_max,
+				pres_dly_max);
 
+			return -ENOTSUP;
+		}
 		return 0;
 	}
 
@@ -1020,6 +1039,9 @@ static void stream_configured_cb(struct bt_bap_stream *stream,
 		LOG_INF("%s sink stream configured", headsets[channel_index].ch_name);
 		le_audio_print_codec(headsets[channel_index].sink_stream.codec_cfg,
 				     stream->ep->dir);
+		LOG_DBG("Configured Stream info: %s, %p, dir %d", headsets[channel_index].ch_name,
+			(void *)stream, stream->ep->dir);
+
 	} else if (stream->ep->dir == BT_AUDIO_DIR_SOURCE) {
 		LOG_INF("%s source stream configured", headsets[channel_index].ch_name);
 		le_audio_print_codec(headsets[channel_index].source_stream.codec_cfg,
@@ -1028,8 +1050,6 @@ static void stream_configured_cb(struct bt_bap_stream *stream,
 		LOG_WRN("Endpoint direction not recognized: %d", stream->ep->dir);
 		return;
 	}
-	LOG_DBG("Configured Stream info: %s, %p, dir %d", headsets[channel_index].ch_name,
-		(void *)stream, stream->ep->dir);
 
 	ret = headset_pres_delay_find(channel_index, &new_pres_dly_us);
 	if (ret) {