---
audio/control.c | 162 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 162 insertions(+), 0 deletions(-)
diff --git a/audio/control.c b/audio/control.c
index 88efdb5..d37848e 100644
--- a/audio/control.c
+++ b/audio/control.c
@@ -123,6 +123,7 @@
#define AVRCP_GET_PLAYER_VALUE_TEXT 0x16
#define AVRCP_DISPLAYABLE_CHARSET 0x17
#define AVRCP_CT_BATTERY_STATUS 0x18
+#define AVRCP_GET_ELEMENT_ATTRIBUTES 0x20
#define AVRCP_GET_PLAY_STATUS 0x30
#define AVRCP_REGISTER_NOTIFICATION 0x31
@@ -195,6 +196,16 @@ enum play_status {
PLAY_STATUS_ERROR = 0xFF
};
+enum media_info_id {
+ MEDIA_INFO_TITLE = 1,
+ MEDIA_INFO_ARTIST = 2,
+ MEDIA_INFO_ALBUM = 3,
+ MEDIA_INFO_TRACK = 4,
+ MEDIA_INFO_N_TRACKS = 5,
+ MEDIA_INFO_GENRE = 6,
+ MEDIA_INFO_CURRENT_POSITION = 7,
+};
+
static DBusConnection *connection = NULL;
static GSList *servers = NULL;
@@ -655,6 +666,95 @@ static const char *battery_status_to_string(enum battery_status status)
return NULL;
}
+/*
+ * Copy media_info field to a buffer, intended to be used in a response to
+ * GetElementAttributes message.
+ *
+ * It assumes there's enough space in the buffer and returns the size written.
+ * If there's an error, nothing is written and -EINVAL is returned.
+ */
+static int media_info_get_elem(struct control *control, uint32_t id,
+ uint8_t *buf)
+{
+ struct media_info_elem {
+ uint32_t id;
+ uint16_t charset;
+ uint16_t len;
+ uint8_t val[];
+ };
+ struct media_info_elem *elem = (void *)buf;
+ struct media_info *mi = &control->mi;
+ uint16_t len;
+ char valstr[20];
+
+ switch (id) {
+ case (MEDIA_INFO_TITLE):
+ if (mi->title) {
+ len = strlen(mi->title);
+ memcpy(elem->val, mi->title, len);
+ } else {
+ len = 0;
+ }
+
+ break;
+ case (MEDIA_INFO_ARTIST):
+ if (mi->artist == NULL)
+ return -ENOENT;
+
+ len = strlen(mi->artist);
+ memcpy(elem->val, mi->artist, len);
+ break;
+ case (MEDIA_INFO_ALBUM):
+ if (mi->album == NULL)
+ return -ENOENT;
+
+ len = strlen(mi->album);
+ memcpy(elem->val, mi->album, len);
+ break;
+ case (MEDIA_INFO_GENRE):
+ if (mi->genre == NULL)
+ return -ENOENT;
+
+ len = strlen(mi->genre);
+ memcpy(elem->val, mi->genre, len);
+ break;
+
+ case (MEDIA_INFO_TRACK):
+ if (!mi->track)
+ return -ENOENT;
+
+ snprintf(valstr, 20, "%u", mi->track);
+ len = strlen(valstr);
+ memcpy(elem->val, valstr, len);
+ break;
+ case (MEDIA_INFO_N_TRACKS):
+ if (!mi->ntracks)
+ return -ENOENT;
+
+ snprintf(valstr, 20, "%u", mi->ntracks);
+ len = strlen(valstr);
+ memcpy(elem->val, valstr, len);
+ break;
+ case (MEDIA_INFO_CURRENT_POSITION):
+ if (mi->current_position == 0xFFFFFFFF)
+ return -ENOENT;
+
+ snprintf(valstr, 20, "%u", mi->current_position);
+ len = strlen(valstr);
+ memcpy(elem->val, valstr, len);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ elem->id = htonl(id);
+ elem->charset = htons(0x6A); /* Always use UTF-8 */
+ elem->len = htons(len);
+
+ return sizeof(struct media_info_elem) + len;
+}
+
+
static void append_variant(DBusMessageIter *iter, int type, void *val)
{
DBusMessageIter value;
@@ -800,6 +900,68 @@ static int handle_vendordep_pdu(struct control *control,
return AVRCP_HEADER_LENGTH +
AVRCP_SPECAVCPDU_HEADER_LENGTH + len + 1;
+ case AVRCP_GET_ELEMENT_ATTRIBUTES:
+ if (len > 8 && avrcp->code == CTYPE_STATUS) {
+ uint16_t pos = 1; /* keep track of position in resp */
+ uint8_t nattr = pdu->params[8];
+ uint64_t *identifier = (void *) &pdu->params[0];
+ int size;
+
+ if (*identifier != 0) {
+ pdu->params[0] = E_INVALID_PARAM;
+ goto err_metadata;
+ }
+
+ len = 0;
+
+ if (!nattr) {
+ /*
+ * Return all available information, at least
+ * title must be returned
+ */
+ for (i = 1; i < MEDIA_INFO_CURRENT_POSITION;
+ i++) {
+ size = media_info_get_elem(control,
+ i, &pdu->params[pos]);
+
+ if (size > 0) {
+ len++;
+ pos += size;
+ }
+ }
+ } else {
+ uint32_t attr_ids[nattr];
+
+ memcpy(&attr_ids[0], &pdu->params[9],
+ nattr * 4);
+
+ for (i = 0; i < nattr; i++) {
+ uint32_t attr = ntohl(attr_ids[i]);
+
+ size = media_info_get_elem(control,
+ attr, &pdu->params[pos]);
+
+ if (size > 0) {
+ len++;
+ pos += size;
+ }
+ }
+
+ if (!len) {
+ pdu->params[0] = E_INVALID_PARAM;
+ goto err_metadata;
+ }
+ }
+
+ avrcp->code = CTYPE_STABLE;
+ pdu->params[0] = len;
+ pdu->params_len = htons(pos);
+
+ return AVRCP_HEADER_LENGTH +
+ AVRCP_SPECAVCPDU_HEADER_LENGTH + pos;
+ }
+
+ break;
case AVRCP_GET_CURRENT_PLAYER_VALUE:
if (len > 1 && pdu->params[0] == len - 1 &&
avrcp->code == CTYPE_STATUS) {
--
1.7.6
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
