From: Vani Patel <vani.patel@xxxxxxxxxxxxxx>
On connection of control channel, VolumeChanged
notification is registered with the CT.
---
audio/avctp.c | 1 +
audio/avrcp.c | 25 ++++++++++++++++++++++++-
audio/avrcp.h | 4 +++-
3 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/audio/avctp.c b/audio/avctp.c
index c5fbc1b..0cbd114 100755
--- a/audio/avctp.c
+++ b/audio/avctp.c
@@ -607,6 +607,7 @@ static void avctp_connect_cb(GIOChannel *chan, GError *err, gpointer data)
init_uinput(session);
avctp_set_state(session, AVCTP_STATE_CONNECTED);
+ register_volume_notification(session);
session->mtu = imtu;
session->io_id = g_io_add_watch(chan,
G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
diff --git a/audio/avrcp.c b/audio/avrcp.c
index 2b25253..f4f1b6a 100755
--- a/audio/avrcp.c
+++ b/audio/avrcp.c
@@ -91,6 +91,7 @@
#define CAP_EVENTS_SUPPORTED 0x03
#define COMMAND 0
#define RESPONSE 1
+#define AVRCP_REGISTER_NOTIFICATION_PARAM_LENGTH 5
enum battery_status {
BATTERY_STATUS_NORMAL = 0,
@@ -591,11 +592,12 @@ static uint8_t avrcp_handle_get_capabilities(struct avrcp_player *player,
return AVC_CTYPE_STABLE;
case CAP_EVENTS_SUPPORTED:
- pdu->params[1] = 4;
+ pdu->params[1] = 5;
pdu->params[2] = AVRCP_EVENT_STATUS_CHANGED;
pdu->params[3] = AVRCP_EVENT_TRACK_CHANGED;
pdu->params[4] = AVRCP_EVENT_TRACK_REACHED_START;
pdu->params[5] = AVRCP_EVENT_TRACK_REACHED_END;
+ pdu->params[6] = AVRCP_EVENT_VOLUME_CHANGED;
pdu->params_len = htons(2 + pdu->params[1]);
return AVC_CTYPE_STABLE;
@@ -1362,3 +1364,24 @@ void avrcp_unregister_player(struct avrcp_player *player)
player_destroy(player);
}
+
+void register_volume_notification(struct avctp *session)
+{
+ uint8_t buf[AVRCP_HEADER_LENGTH + AVRCP_REGISTER_NOTIFICATION_PARAM_LENGTH];
+ struct avrcp_header *pdu = (void *) buf;
+ static uint8_t transaction = 0;
+
+ memset(buf, 0, sizeof(buf));
+
+ set_company_id(pdu->company_id, IEEEID_BTSIG);
+ pdu->pdu_id = AVRCP_REGISTER_NOTIFICATION;
+ pdu->packet_type = AVRCP_PACKET_TYPE_SINGLE;
+ pdu->params[0] = AVRCP_EVENT_VOLUME_CHANGED;
+ pdu->params_len = htons (AVRCP_REGISTER_NOTIFICATION_PARAM_LENGTH);
+
+ uint8_t length = AVRCP_HEADER_LENGTH + ntohs(pdu->params_len);
+
+ uint8_t error = avctp_send_vendordep(session, transaction++,
+ AVC_CTYPE_NOTIFY, AVC_SUBUNIT_PANEL,
+ buf, length, COMMAND);
+}
diff --git a/audio/avrcp.h b/audio/avrcp.h
index 58d555f..26432bc 100755
--- a/audio/avrcp.h
+++ b/audio/avrcp.h
@@ -73,7 +73,8 @@
#define AVRCP_EVENT_TRACK_CHANGED 0x02
#define AVRCP_EVENT_TRACK_REACHED_END 0x03
#define AVRCP_EVENT_TRACK_REACHED_START 0x04
-#define AVRCP_EVENT_LAST AVRCP_EVENT_TRACK_REACHED_START
+#define AVRCP_EVENT_VOLUME_CHANGED 0x0d
+#define AVRCP_EVENT_LAST AVRCP_EVENT_VOLUME_CHANGED
struct avrcp_player_cb {
int (*get_setting) (uint8_t attr, void *user_data);
@@ -101,3 +102,4 @@ int avrcp_player_event(struct avrcp_player *player, uint8_t id, void *data);
int avrcp_player_set_volume(struct avrcp_player *player, void *data);
size_t avrcp_handle_vendor_reject(uint8_t *code, uint8_t *operands);
+void register_volume_notification(struct avctp *session);
--
1.7.5.4
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