[BlueZ PATCH 1/3] profiles/audio: Support MCS fast seeking

[raghu447 <raghavendra.rao@collabora.com>]

From: raghavendra <raghavendra.rao@collabora.com>

---
 profiles/audio/mcp.c   | 43 ++++++++++++++++++++++++++++++++++++++++++
 profiles/audio/media.c | 27 ++++++++++++++++++++++++++
 profiles/audio/media.h |  1 +
 3 files changed, 71 insertions(+)

diff --git a/profiles/audio/mcp.c b/profiles/audio/mcp.c
index 8adf814e8..4df388a22 100644
--- a/profiles/audio/mcp.c
+++ b/profiles/audio/mcp.c
@@ -60,6 +60,7 @@
 
 #define MCS_UUID_STR	"00001848-0000-1000-8000-00805f9b34fb"
 #define GMCS_UUID_STR	"00001849-0000-1000-8000-00805f9b34fb"
+#define MCS_SEEK_OFFSET	(10 * 1000 * 1000)
 
 
 /*
@@ -440,6 +441,7 @@ struct mcs_instance {
 	struct bt_mcs *mcs;
 	struct queue *player_links;
 	bool at_start;
+	int8_t seeking_speed;
 
 	/* GMCS-specific */
 	struct bt_uinput *uinput;
@@ -494,6 +496,11 @@ static void mcs_update_media_state(struct mcs_instance *mcs)
 		state = BT_MCS_STATE_INACTIVE;
 	}
 
+	if (state != BT_MCS_STATE_SEEKING && mcs->seeking_speed) {
+		mcs->seeking_speed = 0;
+		bt_mcs_changed(mcs->mcs, MCS_SEEKING_SPEED_CHRC_UUID);
+	}
+
 	bt_mcs_set_media_state(mcs->mcs, state);
 	bt_mcs_changed(mcs->mcs, MCS_TRACK_POSITION_CHRC_UUID);
 }
@@ -656,6 +663,32 @@ static bool mcs_pause(void *data)
 	return mcs_command(mcs, BT_MCS_CMD_PAUSE);
 }
 
+static bool mcs_fast_rewind(void *data)
+{
+	struct mcs_instance *mcs = data;
+	struct player_link *p = mcs_get_active(mcs);
+
+	if (!p || !local_player_seek(p->lp, -MCS_SEEK_OFFSET))
+		return false;
+
+	mcs->seeking_speed = -1;
+	bt_mcs_changed(mcs->mcs, MCS_SEEKING_SPEED_CHRC_UUID);
+	return true;
+}
+
+static bool mcs_fast_forward(void *data)
+{
+	struct mcs_instance *mcs = data;
+	struct player_link *p = mcs_get_active(mcs);
+
+	if (!p || !local_player_seek(p->lp, MCS_SEEK_OFFSET))
+		return false;
+
+	mcs->seeking_speed = 1;
+	bt_mcs_changed(mcs->mcs, MCS_SEEKING_SPEED_CHRC_UUID);
+	return true;
+}
+
 static bool mcs_stop(void *data)
 {
 	struct mcs_instance *mcs = data;
@@ -752,6 +785,13 @@ static int32_t mcs_track_position(void *data)
 	return local_player_get_position(p->lp) / 10;
 }
 
+static int8_t mcs_seeking_speed(void *data)
+{
+	struct mcs_instance *mcs = data;
+
+	return mcs->seeking_speed;
+}
+
 static uint8_t mcs_playing_order(void *data)
 {
 	struct mcs_instance *mcs = data;
@@ -858,12 +898,15 @@ static const struct bt_mcs_callback gmcs_cb = {
 	.track_title = mcs_track_title,
 	.track_duration = mcs_track_duration,
 	.track_position = mcs_track_position,
+	.seeking_speed = mcs_seeking_speed,
 	.playing_order = mcs_playing_order,
 	.playing_order_supported = mcs_playing_order_supported,
 	.set_track_position = mcs_set_track_position,
 	.set_playing_order = mcs_set_playing_order,
 	.play = mcs_play,
 	.pause = mcs_pause,
+	.fast_rewind = mcs_fast_rewind,
+	.fast_forward = mcs_fast_forward,
 	.stop = mcs_stop,
 	.next_track = mcs_next_track,
 	.previous_track = mcs_previous_track,
diff --git a/profiles/audio/media.c b/profiles/audio/media.c
index 95f9580b0..aeb6226da 100644
--- a/profiles/audio/media.c
+++ b/profiles/audio/media.c
@@ -157,6 +157,7 @@ struct local_player {
 	GTimer			*timer;
 	bool			play;
 	bool			pause;
+	bool			seek;
 	bool			next;
 	bool			previous;
 	bool			control;
@@ -2296,6 +2297,29 @@ bool local_player_pause(struct local_player *mp)
 	return local_player_send(mp, "Pause");
 }
 
+bool local_player_seek(struct local_player *mp, int64_t offset)
+{
+	DBusMessage *msg;
+
+	DBG("");
+
+	if (!mp->seek || !mp->control)
+		return false;
+
+	msg = dbus_message_new_method_call(mp->sender, mp->path,
+					MEDIA_PLAYER_INTERFACE, "Seek");
+	if (msg == NULL) {
+		error("Couldn't allocate D-Bus message");
+		return false;
+	}
+
+	dbus_message_append_args(msg, DBUS_TYPE_INT64, &offset,
+					DBUS_TYPE_INVALID);
+	g_dbus_send_message(btd_get_dbus_connection(), msg);
+
+	return true;
+}
+
 bool local_player_next(struct local_player *mp)
 {
 	DBG("");
@@ -2673,6 +2697,9 @@ static gboolean set_player_property(struct local_player *mp, const char *key,
 	if (strcasecmp(key, "CanPause") == 0)
 		return set_flag(mp, &var, &mp->pause);
 
+	if (strcasecmp(key, "CanSeek") == 0)
+		return set_flag(mp, &var, &mp->seek);
+
 	if (strcasecmp(key, "CanGoNext") == 0)
 		return set_flag(mp, &var, &mp->next);
 
diff --git a/profiles/audio/media.h b/profiles/audio/media.h
index 1c43075ba..a89466657 100644
--- a/profiles/audio/media.h
+++ b/profiles/audio/media.h
@@ -73,6 +73,7 @@ bool local_player_have_track(struct local_player *lp);
 bool local_player_play(struct local_player *lp);
 bool local_player_stop(struct local_player *lp);
 bool local_player_pause(struct local_player *lp);
+bool local_player_seek(struct local_player *lp, int64_t offset);
 bool local_player_next(struct local_player *lp);
 bool local_player_previous(struct local_player *lp);