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avrcp: only parse get element attributes for AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE or AVRCP_CTYPE_RESPONSE_CHANGED_STABLE

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This commit is contained in:
Matthias Ringwald 2017-06-02 16:00:20 +02:00
parent 849f10d83f
commit 4bb88fd7fc
1 changed files with 34 additions and 31 deletions
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65
src/classic/avrcp.c
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@ -864,42 +864,45 @@ static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connec
uint8_t num_string_attributes = 0;
uint16_t total_event_payload_for_string_attributes = HCI_EVENT_PAYLOAD_SIZE-2;
uint16_t max_string_attribute_value_len = 0;
for (i = 0; i < num_attributes; i++){
avrcp_media_attribute_id_t attr_id = big_endian_read_32(packet, pos);
pos += 4;
// uint16_t character_set = big_endian_read_16(packet, pos);
pos += 2;
uint16_t attr_value_length = big_endian_read_16(packet, pos);
pos += 2;
if (ctype == AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE || ctype == AVRCP_CTYPE_RESPONSE_CHANGED_STABLE){
for (i = 0; i < num_attributes; i++){
avrcp_media_attribute_id_t attr_id = big_endian_read_32(packet, pos);
pos += 4;
// uint16_t character_set = big_endian_read_16(packet, pos);
pos += 2;
uint16_t attr_value_length = big_endian_read_16(packet, pos);
pos += 2;
// debug - to remove later
uint8_t value[100];
uint16_t value_len = sizeof(value) <= attr_value_length? sizeof(value) - 1 : attr_value_length;
memcpy(value, packet+pos, value_len);
value[value_len] = 0;
// printf("Now Playing Info %s: %s \n", attribute2str(attr_id), value);
// end debug
// debug - to remove later
uint8_t value[100];
uint16_t value_len = sizeof(value) <= attr_value_length? sizeof(value) - 1 : attr_value_length;
memcpy(value, packet+pos, value_len);
value[value_len] = 0;
// printf("Now Playing Info %s: %s \n", attribute2str(attr_id), value);
// end debug
if ((attr_id >= 1) || (attr_id <= AVRCP_MEDIA_ATTR_COUNT)) {
items[attr_id-1].len = attr_value_length;
items[attr_id-1].value = &packet[pos];
switch (attr_id){
case AVRCP_MEDIA_ATTR_TITLE:
case AVRCP_MEDIA_ATTR_ARTIST:
case AVRCP_MEDIA_ATTR_ALBUM:
case AVRCP_MEDIA_ATTR_GENRE:
num_string_attributes++;
string_attributes_len += attr_value_length;
if (max_string_attribute_value_len < attr_value_length){
max_string_attribute_value_len = attr_value_length;
}
break;
default:
break;
if ((attr_id >= 1) || (attr_id <= AVRCP_MEDIA_ATTR_COUNT)) {
items[attr_id-1].len = attr_value_length;
items[attr_id-1].value = &packet[pos];
switch (attr_id){
case AVRCP_MEDIA_ATTR_TITLE:
case AVRCP_MEDIA_ATTR_ARTIST:
case AVRCP_MEDIA_ATTR_ALBUM:
case AVRCP_MEDIA_ATTR_GENRE:
num_string_attributes++;
string_attributes_len += attr_value_length;
if (max_string_attribute_value_len < attr_value_length){
max_string_attribute_value_len = attr_value_length;
}
break;
default:
break;
}
}
pos += attr_value_length;
}
pos += attr_value_length;
}
// subtract space for fixed fields
total_event_payload_for_string_attributes -= 14 + 4; // 4 for '\0'