/*
* Copyright (C) 2016 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define __BTSTACK_FILE__ "avrcp_browsing_controller.c"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "btstack.h"
#include "classic/avrcp.h"
#include "classic/avrcp_browsing_controller.h"
#define PSM_AVCTP_BROWSING 0x001b
void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context);
static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static avrcp_connection_t * get_avrcp_connection_for_browsing_cid(uint16_t browsing_cid, avrcp_context_t * context){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections);
while (btstack_linked_list_iterator_has_next(&it)){
avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it);
if (connection->avrcp_browsing_cid != browsing_cid) continue;
return connection;
}
return NULL;
}
static avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(uint16_t browsing_l2cap_cid, avrcp_context_t * context){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections);
while (btstack_linked_list_iterator_has_next(&it)){
avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it);
if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue;
return connection;
}
return NULL;
}
static avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(uint16_t l2cap_cid, avrcp_context_t * context){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections);
while (btstack_linked_list_iterator_has_next(&it)){
avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it);
if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue;
return connection->browsing_connection;
}
return NULL;
}
static void avrcp_emit_browsing_connection_established(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr, uint8_t status){
if (!callback) return;
uint8_t event[12];
int pos = 0;
event[pos++] = HCI_EVENT_AVRCP_META;
event[pos++] = sizeof(event) - 2;
event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED;
event[pos++] = status;
reverse_bd_addr(addr,&event[pos]);
pos += 6;
little_endian_store_16(event, pos, browsing_cid);
pos += 2;
(*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static void avrcp_emit_incoming_browsing_connection(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr){
if (!callback) return;
uint8_t event[11];
int pos = 0;
event[pos++] = HCI_EVENT_AVRCP_META;
event[pos++] = sizeof(event) - 2;
event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION;
reverse_bd_addr(addr,&event[pos]);
pos += 6;
little_endian_store_16(event, pos, browsing_cid);
pos += 2;
(*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static void avrcp_emit_browsing_connection_closed(btstack_packet_handler_t callback, uint16_t browsing_cid){
if (!callback) return;
uint8_t event[5];
int pos = 0;
event[pos++] = HCI_EVENT_AVRCP_META;
event[pos++] = sizeof(event) - 2;
event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED;
little_endian_store_16(event, pos, browsing_cid);
pos += 2;
(*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){
avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get();
memset(connection, 0, sizeof(avrcp_browsing_connection_t));
connection->state = AVCTP_CONNECTION_IDLE;
connection->transaction_label = 0xFF;
avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid();
avrcp_connection->browsing_connection = connection;
return connection;
}
static uint8_t avrcp_browsing_connect(bd_addr_t remote_addr, avrcp_context_t * context, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * browsing_cid){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr(remote_addr, context);
if (!avrcp_connection){
log_error("avrcp: there is no previously established AVRCP controller connection.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection;
if (connection){
log_error(" avrcp_browsing_connect connection exists.");
return ERROR_CODE_SUCCESS;
}
connection = avrcp_browsing_create_connection(avrcp_connection);
if (!connection){
log_error("avrcp: could not allocate connection struct.");
return BTSTACK_MEMORY_ALLOC_FAILED;
}
if (!browsing_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST;
*browsing_cid = avrcp_connection->avrcp_browsing_cid;
connection->ertm_buffer = ertm_buffer;
connection->ertm_buffer_size = size;
avrcp_connection->browsing_connection = connection;
memcpy(&connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t));
return l2cap_create_ertm_channel(avrcp_browsing_controller_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm,
&connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL);
}
void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){
UNUSED(channel);
UNUSED(size);
bd_addr_t event_addr;
uint16_t local_cid;
uint8_t status;
avrcp_browsing_connection_t * browsing_connection = NULL;
avrcp_connection_t * avrcp_connection = NULL;
if (packet_type != HCI_EVENT_PACKET) return;
switch (hci_event_packet_get_type(packet)) {
case HCI_EVENT_DISCONNECTION_COMPLETE:
avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, 0);
break;
case L2CAP_EVENT_INCOMING_CONNECTION:
l2cap_event_incoming_connection_get_address(packet, event_addr);
local_cid = l2cap_event_incoming_connection_get_local_cid(packet);
avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context);
if (!avrcp_connection) {
log_error("No previously created AVRCP controller connections");
l2cap_decline_connection(local_cid);
break;
}
browsing_connection = avrcp_browsing_create_connection(avrcp_connection);
browsing_connection->l2cap_browsing_cid = local_cid;
browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION;
log_info("Emit AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION browsing_cid 0x%02x, l2cap_signaling_cid 0x%02x\n", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid);
avrcp_emit_incoming_browsing_connection(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr);
break;
case L2CAP_EVENT_CHANNEL_OPENED:
l2cap_event_channel_opened_get_address(packet, event_addr);
status = l2cap_event_channel_opened_get_status(packet);
local_cid = l2cap_event_channel_opened_get_local_cid(packet);
avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context);
if (!avrcp_connection){
log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr));
avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST);
l2cap_disconnect(local_cid, 0); // reason isn't used
break;
}
browsing_connection = avrcp_connection->browsing_connection;
if (status != ERROR_CODE_SUCCESS){
log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status);
avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, status);
btstack_memory_avrcp_browsing_connection_free(browsing_connection);
avrcp_connection->browsing_connection = NULL;
break;
}
if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break;
browsing_connection->l2cap_browsing_cid = local_cid;
log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid);
browsing_connection->state = AVCTP_CONNECTION_OPENED;
avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS);
break;
case L2CAP_EVENT_CHANNEL_CLOSED:
// data: event (8), len(8), channel (16)
local_cid = l2cap_event_channel_closed_get_local_cid(packet);
avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context);
if (avrcp_connection && avrcp_connection->browsing_connection){
avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid);
// free connection
btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection);
avrcp_connection->browsing_connection = NULL;
break;
}
break;
default:
break;
}
}
static int avrcp_browsing_controller_send_get_folder_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){
uint8_t command[100];
int pos = 0;
// transport header
// Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier)
command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0;
// Profile IDentifier (PID)
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8;
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF;
command[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS;
uint32_t attribute_count = 0;
uint32_t attributes_to_copy = 0;
switch (connection->attr_bitmap){
case AVRCP_MEDIA_ATTR_NONE:
attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF
break;
case AVRCP_MEDIA_ATTR_ALL:
attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0
break;
default:
attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff);
attributes_to_copy = attribute_count;
break;
}
big_endian_store_16(command, pos, 10 + attribute_count);
pos += 2;
command[pos++] = connection->scope;
big_endian_store_32(command, pos, connection->start_item);
pos += 4;
big_endian_store_32(command, pos, connection->end_item);
pos += 4;
command[pos++] = attribute_count;
int bit_position = 1;
while (attributes_to_copy){
if (connection->attr_bitmap & (1 << bit_position)){
big_endian_store_32(command, pos, bit_position);
pos += 4;
attributes_to_copy--;
}
bit_position++;
}
return l2cap_send(cid, command, pos);
}
static int avrcp_browsing_controller_send_change_path_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){
uint8_t command[100];
int pos = 0;
// transport header
// Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier)
command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0;
// Profile IDentifier (PID)
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8;
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF;
command[pos++] = AVRCP_PDU_ID_CHANGE_PATH;
big_endian_store_16(command, pos, 11);
pos += 2;
pos += 2;
command[pos++] = connection->direction;
memcpy(command+pos, connection->folder_uid, 8);
pos += 8;
return l2cap_send(cid, command, pos);
}
static int avrcp_browsing_controller_send_search_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){
uint8_t command[100];
int pos = 0;
// transport header
// Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier)
command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0;
// Profile IDentifier (PID)
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8;
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF;
command[pos++] = AVRCP_PDU_ID_SEARCH;
big_endian_store_16(command, pos, 4 + connection->search_str_len);
pos += 2;
big_endian_store_16(command, pos, 0x006A);
pos += 2;
big_endian_store_16(command, pos, connection->search_str_len);
pos += 2;
memcpy(command+pos,connection->search_str, connection->search_str_len);
pos += connection->search_str_len;
return l2cap_send(cid, command, pos);
}
static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){
uint8_t command[100];
int pos = 0;
// transport header
// Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier)
command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0;
// Profile IDentifier (PID)
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8;
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF;
command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER;
big_endian_store_16(command, pos, 2);
pos += 2;
big_endian_store_16(command, pos, connection->browsed_player_id);
pos += 2;
return l2cap_send(cid, command, pos);
}
static int avrcp_browsing_controller_send_get_total_nr_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){
uint8_t command[7];
int pos = 0;
// transport header
// Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier)
command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0;
// Profile IDentifier (PID)
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8;
command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF;
command[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS;
big_endian_store_16(command, pos, 1);
pos += 2;
command[pos++] = connection->get_total_nr_items_scope;
return l2cap_send(cid, command, pos);
}
static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){
switch (connection->state){
case AVCTP_CONNECTION_OPENED:
if (connection->set_browsed_player_id){
connection->state = AVCTP_W2_RECEIVE_RESPONSE;
connection->set_browsed_player_id = 0;
avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection);
break;
}
if (connection->get_total_nr_items){
connection->state = AVCTP_W2_RECEIVE_RESPONSE;
connection->get_total_nr_items = 0;
avrcp_browsing_controller_send_get_total_nr_items_cmd(connection->l2cap_browsing_cid, connection);
break;
}
if (connection->get_folder_item){
connection->state = AVCTP_W2_RECEIVE_RESPONSE;
connection->get_folder_item = 0;
avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection);
break;
}
if (connection->change_path){
connection->state = AVCTP_W2_RECEIVE_RESPONSE;
connection->change_path = 0;
avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection);
break;
}
if (connection->search){
connection->state = AVCTP_W2_RECEIVE_RESPONSE;
connection->search = 0;
avrcp_browsing_controller_send_search_cmd(connection->l2cap_browsing_cid, connection);
break;
}
break;
default:
return;
}
}
static void avrcp_browsing_controller_emit_done_with_uid_counter(btstack_packet_handler_t callback, uint16_t browsing_cid, uint16_t uid_counter, uint8_t browsing_status, uint8_t bluetooth_status){
if (!callback) return;
uint8_t event[9];
int pos = 0;
event[pos++] = HCI_EVENT_AVRCP_META;
event[pos++] = sizeof(event) - 2;
event[pos++] = AVRCP_SUBEVENT_BROWSING_DONE;
little_endian_store_16(event, pos, browsing_cid);
pos += 2;
little_endian_store_16(event, pos, uid_counter);
pos += 2;
event[pos++] = browsing_status;
event[pos++] = bluetooth_status;
(*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static void avrcp_parser_reset(avrcp_browsing_connection_t * connection){
connection->parser_attribute_header_pos = 0;
connection->parsed_attribute_value_offset = 0;
connection->parsed_num_attributes = 0;
connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER;
}
static void avrcp_browsing_parser_process_byte(uint8_t byte, avrcp_browsing_connection_t * connection){
uint8_t prepended_header_size = 1;
switch(connection->parser_state){
case AVRCP_PARSER_GET_ATTRIBUTE_HEADER:{
connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte;
if (connection->parser_attribute_header_pos < AVRCP_BROWSING_ITEM_HEADER_LEN) break;
uint16_t attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 1);
connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = connection->parser_attribute_header[0]; // prepend with item type
connection->parsed_attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTTE_SIZE - prepended_header_size); // reduce AVRCP_MAX_ATTRIBUTTE_SIZE for the size ot item type
connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE;
break;
}
case AVRCP_PARSER_GET_ATTRIBUTE_VALUE:{
if (connection->parsed_attribute_value_offset < connection->parsed_attribute_value_len + prepended_header_size){
connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = byte;
break;
}
if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1)){
connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE;
break;
}
connection->parsed_num_attributes++;
(*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset);
if (connection->parsed_num_attributes == connection->num_items){
avrcp_parser_reset(connection);
connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER;
connection->parser_attribute_header_pos = 0;
break;
}
break;
}
case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE:
if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1) + prepended_header_size){
connection->parsed_attribute_value_offset++;
break;
}
connection->parsed_num_attributes++;
(*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset);
if (connection->parsed_num_attributes == connection->num_items){
avrcp_parser_reset(connection);
connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER;
connection->parser_attribute_header_pos = 0;
break;
}
break;
default:
break;
}
}
static void avrcp_browsing_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_browsing_connection_t * connection){
int i;
for (i=0;i<num_bytes_to_read;i++){
avrcp_browsing_parser_process_byte(packet[i], connection);
}
}
static void avrcp_browsing_controller_emit_done(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){
avrcp_browsing_controller_emit_done_with_uid_counter(callback, browsing_cid, 0, browsing_status, bluetooth_status);
}
static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
avrcp_browsing_connection_t * browsing_connection;
switch (packet_type) {
case L2CAP_DATA_PACKET:{
browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context);
if (!browsing_connection) break;
int pos = 0;
uint8_t transport_header = packet[pos++];
// Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier)
// uint8_t transaction_label = transport_header >> 4;
avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2;
// printf("L2CAP_DATA_PACKET, packet type \n");
switch (avctp_packet_type){
case AVRCP_SINGLE_PACKET:
case AVRCP_START_PACKET:
// uint8_t frame_type = (transport_header & 0x03) >> 1;
// uint8_t ipid = transport_header & 0x01;
pos += 2;
browsing_connection->num_packets = 1;
if (avctp_packet_type == AVRCP_START_PACKET){
browsing_connection->num_packets = packet[pos++];
}
if (pos + 4 > size){
avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS);
return;
}
browsing_connection->pdu_id = packet[pos++];
// uint16_t length = big_endian_read_16(packet, pos);
pos += 2;
browsing_connection->browsing_status = packet[pos++];
if (browsing_connection->browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){
avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS);
return;
}
browsing_connection->uid_counter = big_endian_read_16(packet, pos);
pos += 2;
break;
default:
break;
}
uint32_t i;
switch(browsing_connection->pdu_id){
case AVRCP_PDU_ID_CHANGE_PATH:
printf("AVRCP_PDU_ID_CHANGE_PATH \n");
break;
case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER:
printf("AVRCP_PDU_ID_SET_ADDRESSED_PLAYER \n");
break;
case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{
uint32_t num_items = big_endian_read_32(packet, pos);
pos += 4;
printf("TDO: send event, uid_counter %d, num_items %d\n", browsing_connection->uid_counter, num_items);
break;
}
case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{
// uint32_t num_items = big_endian_read_32(packet, pos);
pos += 4;
// uint16_t charset = big_endian_read_16(packet, pos);
pos += 2;
uint8_t folder_depth = packet[pos++];
for (i = 0; i < folder_depth; i++){
uint16_t folder_name_length = big_endian_read_16(packet, pos);
pos += 2;
// reuse packet and add data type as a header
packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER;
(*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, folder_name_length+1);
pos += folder_name_length;
}
break;
}
case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{
printf("AVRCP_PDU_ID_GET_FOLDER_ITEMS\n");
switch (avctp_packet_type){
case AVRCP_SINGLE_PACKET:
case AVRCP_START_PACKET:
avrcp_parser_reset(browsing_connection);
browsing_connection->num_items = big_endian_read_16(packet, pos); //num_items
pos += 2;
printf(" num items %d\n", browsing_connection->num_items);
avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection);
break;
case AVRCP_CONTINUE_PACKET:
avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection);
break;
case AVRCP_END_PACKET:
avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection);
avrcp_parser_reset(browsing_connection);
break;
}
break;
}
case AVRCP_PDU_ID_SEARCH:{
uint32_t num_items = big_endian_read_32(packet, pos);
printf("TODO: send as event, search found %d items\n", num_items);
break;
}
default:
break;
}
switch (avctp_packet_type){
case AVRCP_SINGLE_PACKET:
case AVRCP_END_PACKET:
browsing_connection->state = AVCTP_CONNECTION_OPENED;
avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS);
break;
default:
break;
}
break;
}
case HCI_EVENT_PACKET:
switch (hci_event_packet_get_type(packet)){
case L2CAP_EVENT_CAN_SEND_NOW:
browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context);
if (!browsing_connection) break;
avrcp_browsing_controller_handle_can_send_now(browsing_connection);
break;
default:
avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context);
break;
}
default:
break;
}
}
void avrcp_browsing_controller_init(void){
avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler;
l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_0);
}
void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){
if (callback == NULL){
log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback");
return;
}
avrcp_controller_context.browsing_avrcp_callback = callback;
}
uint8_t avrcp_browsing_controller_connect(bd_addr_t bd_addr, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * avrcp_browsing_cid){
return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid);
}
uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_browsing_controller_disconnect: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED;
l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0);
return ERROR_CODE_SUCCESS;
}
uint8_t avrcp_avrcp_browsing_configure_incoming_connection(uint16_t avrcp_browsing_cid, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
if (!avrcp_connection->browsing_connection){
log_error("avrcp_avrcp_browsing_decline_incoming_connection: no browsing connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){
log_error("avrcp_avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED;
avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer;
avrcp_connection->browsing_connection->ertm_buffer_size = size;
memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t));
l2cap_accept_ertm_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid, &avrcp_connection->browsing_connection->ertm_config, avrcp_connection->browsing_connection->ertm_buffer, avrcp_connection->browsing_connection->ertm_buffer_size);
return ERROR_CODE_SUCCESS;
}
uint8_t avrcp_avrcp_browsing_decline_incoming_connection(uint16_t avrcp_browsing_cid){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS;
if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED;
l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid);
// free connection
btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection);
avrcp_connection->browsing_connection = NULL;
return ERROR_CODE_SUCCESS;
}
/**
* @brief Retrieve a listing of the contents of a folder.
* @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing
* @param start_item
* @param end_item
* @param attribute_count
* @param attribute_list
**/
static uint8_t avrcp_browsing_controller_get_folder_items(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_browsing_controller_disconnect: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection;
if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED;
connection->get_folder_item = 1;
connection->scope = scope;
connection->start_item = start_item;
connection->end_item = end_item;
connection->attr_bitmap = attr_bitmap;
avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid);
return ERROR_CODE_SUCCESS;
}
uint8_t avrcp_browsing_controller_get_media_players(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){
return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_LIST, start_item, end_item, attr_bitmap);
}
uint8_t avrcp_browsing_controller_browse_file_system(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){
// return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap);
return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_VIRTUAL_FILESYSTEM, start_item, end_item, attr_bitmap);
}
uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){
// return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL);
return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_SEARCH, start_item, end_item, attr_bitmap);
}
uint8_t avrcp_browsing_controller_browse_now_playing_list(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){
return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_NOW_PLAYING, start_item, end_item, attr_bitmap);
}
uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_browsing_controller_change_path: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection;
if (connection->state != AVCTP_CONNECTION_OPENED){
log_error("avrcp_browsing_controller_change_path: connection in wrong state.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
connection->set_browsed_player_id = 1;
connection->browsed_player_id = browsed_player_id;
avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid);
return ERROR_CODE_SUCCESS;
}
/**
* @brief Retrieve a listing of the contents of a folder.
* @param direction 0-folder up, 1-folder down
* @param folder_uid 8 bytes long
**/
uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_browsing_controller_change_path: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection;
if (!connection || connection->state != AVCTP_CONNECTION_OPENED){
log_error("avrcp_browsing_controller_change_path: connection in wrong state.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
if (!connection->browsed_player_id){
log_error("avrcp_browsing_controller_change_path: no browsed player set.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
printf(" send change path\n");
connection->change_path = 1;
connection->direction = direction;
memset(connection->folder_uid, 0, 8);
if (folder_uid){
memcpy(connection->folder_uid, folder_uid, 8);
}
avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid);
return ERROR_CODE_SUCCESS;
}
uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){
return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, NULL);
}
uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){
return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid);
}
uint8_t avrcp_browsing_controller_search(uint16_t avrcp_browsing_cid, uint16_t search_str_len, char * search_str){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_browsing_controller_change_path: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection;
if (!connection || connection->state != AVCTP_CONNECTION_OPENED){
log_error("avrcp_browsing_controller_change_path: connection in wrong state.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
if (!connection->browsed_player_id){
log_error("avrcp_browsing_controller_change_path: no browsed player set.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
if (!search_str || search_str_len == 0){
return AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND;
}
connection->search = 1;
connection->search_str_len = btstack_min(search_str_len, sizeof(connection->search_str)-1);
memset(connection->search_str, 0, sizeof(connection->search_str));
memcpy(connection->search_str, search_str, connection->search_str_len);
avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid);
return ERROR_CODE_SUCCESS;
}
uint8_t avrcp_browsing_controller_get_total_nr_items(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope){
avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context);
if (!avrcp_connection){
log_error("avrcp_browsing_controller_change_path: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection;
if (!connection || connection->state != AVCTP_CONNECTION_OPENED){
log_error("avrcp_browsing_controller_change_path: connection in wrong state.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
if (!connection->browsed_player_id){
log_error("avrcp_browsing_controller_change_path: no browsed player set.");
return ERROR_CODE_COMMAND_DISALLOWED;
}
connection->get_total_nr_items = 1;
connection->get_total_nr_items_scope = scope;
avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid);
return ERROR_CODE_SUCCESS;
}