Bluetooth: BAP: Support setting different values per dir in CIG

The interval and latency for a CIG are set for each direction now,
allowing applications to use e.g. 10ms for sink ASEs and 7.5ms for
source ASEs.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

include/zephyr/bluetooth/audio/bap.h

@@ -1158,8 +1158,10 @@ struct bt_bap_unicast_group_param {
 /**
  * @brief Create audio unicast group.
  *
- * Create a new audio unicast group with one or more audio streams as a unicast client. Streams in
- * a unicast group shall share the same interval, framing and latency (see @ref bt_audio_codec_qos).
+ * Create a new audio unicast group with one or more audio streams as a unicast client.
+ * All streams shall share the same framing.
+ * All streams in the same direction shall share the same interval and latency (see
+ * @ref bt_audio_codec_qos).
  *
  * @param[in]  param          The unicast group create parameters.
  * @param[out] unicast_group  Pointer to the unicast group created.

subsys/bluetooth/audio/bap_endpoint.h

@@ -64,11 +64,27 @@ struct bt_bap_ep {
 	struct bt_bap_broadcast_sink *broadcast_sink;
 };
 
+struct bt_bap_unicast_group_cig_param {
+	uint32_t c_to_p_interval;
+	uint32_t p_to_c_interval;
+	uint16_t c_to_p_latency;
+	uint16_t p_to_c_latency;
+	uint8_t framing;
+	uint8_t packing;
+#if defined(CONFIG_BT_ISO_TEST_PARAMS)
+	uint8_t c_to_p_ft;
+	uint8_t p_to_c_ft;
+	uint16_t iso_interval;
+#endif /* CONFIG_BT_ISO_TEST_PARAMS */
+};
+
 struct bt_bap_unicast_group {
+	/* Group-wide QoS used to create the CIG */
+	struct bt_bap_unicast_group_cig_param cig_param;
+
+	/* Unicast group fields */
 	uint8_t index;
 	bool allocated;
-	/* QoS used to create the CIG */
-	const struct bt_audio_codec_qos *qos;
 	struct bt_iso_cig *cig;
 	/* The ISO API for CIG creation requires an array of pointers to ISO channels */
 	struct bt_iso_chan *cis[UNICAST_GROUP_STREAM_CNT];