int a2dp_source_stream_send_media_payload(uint16_t a2dp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){
avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context);
if (!stream_endpoint) {
log_error("A2DP source: no stream_endpoint with seid %d", local_seid);
return 0;
}
if (a2dp_source_context.avdtp_cid != a2dp_cid){
log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid);
return 0;
}
if (stream_endpoint->l2cap_media_cid == 0){
log_error("A2DP source: no media connection for seid %d", local_seid);
return 0;
}
int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
int offset = 0;
l2cap_reserve_packet_buffer();
uint8_t * media_packet = l2cap_get_outgoing_buffer();
//int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number);
a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames);
stream_endpoint->sequence_number++;
l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset);
return size;
}
static int avdtp_source_stream_send_media_payload(uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){
avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context);
if (!stream_endpoint) {
log_error("no stream_endpoint found for seid %d", local_seid);
return 0;
}
if (stream_endpoint->l2cap_media_cid == 0){
log_error("no media cid found for seid %d", local_seid);
return 0;
}
int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
int offset = 0;
// HACK / PTS requests ERTM although we did not offer it in L2CAP Information Request. Withouth ERTM support, default MTU of 48 will be used, but that's to
// small for a 44.1kHz/16/8/Stereo/bitpool 53 sbc frame of 119 bytes (+ media info)
size = 0x290;
l2cap_reserve_packet_buffer();
uint8_t * media_packet = l2cap_get_outgoing_buffer();
//int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number);
a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames);
stream_endpoint->sequence_number++;
l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset);
return size;
}
int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){
avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context);
if (!stream_endpoint) {
log_error("A2DP source: no stream_endpoint with seid %d", local_seid);
return 0;
}
if (a2dp_source_context.avdtp_cid != a2dp_cid){
log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid);
return 0;
}
if (stream_endpoint->l2cap_media_cid == 0){
log_error("A2DP source: no media connection for seid %d", local_seid);
return 0;
}
return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE;
}
// we assume that we don't get two requests in a row
static void sdp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
uint16_t transaction_id;
SDP_PDU_ID_t pdu_id;
uint16_t remote_mtu;
// uint16_t param_len;
switch (packet_type) {
case L2CAP_DATA_PACKET:
pdu_id = (SDP_PDU_ID_t) packet[0];
transaction_id = READ_NET_16(packet, 1);
// param_len = READ_NET_16(packet, 3);
remote_mtu = l2cap_get_remote_mtu_for_local_cid(channel);
// account for our buffer
if (remote_mtu > SDP_RESPONSE_BUFFER_SIZE) {
remote_mtu = SDP_RESPONSE_BUFFER_SIZE;
}
// log_info("SDP Request: type %u, transaction id %u, len %u, mtu %u", pdu_id, transaction_id, param_len, remote_mtu);
switch (pdu_id) {
case SDP_ServiceSearchRequest:
sdp_response_size = sdp_handle_service_search_request(packet, remote_mtu);
break;
case SDP_ServiceAttributeRequest:
sdp_response_size = sdp_handle_service_attribute_request(packet, remote_mtu);
break;
case SDP_ServiceSearchAttributeRequest:
sdp_response_size = sdp_handle_service_search_attribute_request(packet, remote_mtu);
break;
default:
sdp_response_size = sdp_create_error_response(transaction_id, 0x0003); // invalid syntax
break;
}
sdp_try_respond();
break;
case HCI_EVENT_PACKET:
switch (packet[0]) {
case L2CAP_EVENT_INCOMING_CONNECTION:
if (l2cap_cid) {
// CONNECTION REJECTED DUE TO LIMITED RESOURCES
l2cap_decline_connection_internal(channel, 0x04);
break;
}
// accept
l2cap_cid = channel;
sdp_response_size = 0;
l2cap_accept_connection_internal(channel);
break;
case L2CAP_EVENT_CHANNEL_OPENED:
if (packet[2]) {
// open failed -> reset
l2cap_cid = 0;
}
break;
case L2CAP_EVENT_CREDITS:
case DAEMON_EVENT_HCI_PACKET_SENT:
sdp_try_respond();
break;
case L2CAP_EVENT_CHANNEL_CLOSED:
if (channel == l2cap_cid) {
// reset
l2cap_cid = 0;
}
break;
default:
// other event
break;
}
break;
default:
// other packet type
break;
}
}
