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[BlueZ,v2,06/14] shared/bap: Handle multiple bcast sink streams

Message ID 20241025122146.17925-7-iulia.tanasescu@nxp.com
State Superseded
Headers show
Series bap: Add support for Broadcast Sink AC 13 | expand

Commit Message

Iulia Tanasescu Oct. 25, 2024, 12:21 p.m. UTC 
This adds shared/bap support for enabling and starting multiple Broadcast
Sink streams. Stream enabling should fail if any other Broadcast Sink
streams are in the process of enabling or have been enabled for the same
source. Also, a stream that has been enabled and already has the fd set
should be started on the spot.
---
 src/shared/bap.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
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Patch

diff --git a/src/shared/bap.c b/src/shared/bap.c
index b314b4b99..dad510aec 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -2195,6 +2195,12 @@  static void bap_bcast_set_state(struct bt_bap_stream *stream, uint8_t state)
 		bap_stream_io_detach(stream);
 		stream_set_state(stream, BT_BAP_STREAM_STATE_IDLE);
 		break;
+	case BT_ASCS_ASE_STATE_ENABLING:
+		if (bt_bap_stream_get_io(stream))
+			/* Start stream if fd has already been set */
+			bt_bap_stream_start(stream, NULL, NULL);
+
+		break;
 	}
 
 	bt_bap_stream_unref(stream);
@@ -2205,11 +2211,40 @@  static unsigned int bap_bcast_get_state(struct bt_bap_stream *stream)
 	return stream->state;
 }
 
+static bool bcast_sink_stream_enabled(const void *data, const void *match_data)
+{
+	struct bt_bap_stream *stream = (struct bt_bap_stream *)data;
+	struct bt_bap_stream *match = (struct bt_bap_stream *)match_data;
+	uint8_t state = bt_bap_stream_get_state(stream);
+
+	if (stream == match)
+		return false;
+
+	if (queue_find(stream->links, NULL, match))
+		return false;
+
+	/* Ignore streams that are not Broadcast Sink */
+	if (bt_bap_pac_get_type(stream->lpac) != BT_BAP_BCAST_SINK)
+		return false;
+
+	return ((state == BT_BAP_STREAM_STATE_ENABLING) ||
+			bt_bap_stream_get_io(stream));
+}
+
 static unsigned int bap_bcast_sink_enable(struct bt_bap_stream *stream,
 					bool enable_links, struct iovec *data,
 					bt_bap_stream_func_t func,
 					void *user_data)
 {
+	struct bt_bap *bap = stream->bap;
+
+	/* The stream cannot be enabled if there is any other
+	 * unlinked stream for the same source that is in the
+	 * process of enabling or that has already been started.
+	 */
+	if (queue_find(bap->streams, bcast_sink_stream_enabled, stream))
+		return 0;
+
 	stream_set_state(stream, BT_BAP_STREAM_STATE_ENABLING);
 
 	return 1;