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btstack/example/avrcp_browsing_client.c
Milanka Ringwald c0a054f62c avrcp browsing: handle incoming avrcp connection
2017-12-13 14:29:15 +01:00

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/*
* 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_client.c"
/*
* avrcp_browsing_client.c
*/
// *****************************************************************************
/* EXAMPLE_START(avrcp_browsing_client): Browse media players and media information on a remote device.
*
* @text This example demonstrates how to use the AVRCP Controller Browsing service to
* browse madia players and media information on a remote AVRCP Source device.
*
* @test To test with a remote device, e.g. a mobile phone,
* pair from the remote device with the demo, then use the UI for browsing (tap
* SPACE on the console to show the available AVRCP commands).
*
*/
// *****************************************************************************
#include <stdint.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "btstack.h"
#ifdef HAVE_BTSTACK_STDIN
#include "btstack_stdin.h"
#endif
#define AVRCP_BROWSING_MAX_PLAYERS 10
#define AVRCP_BROWSING_MAX_FOLDERS 10
#define AVRCP_BROWSING_MAX_FOLDER_NAME_LEN 30
#ifdef HAVE_BTSTACK_STDIN
// mac 2011: static bd_addr_t remote = {0x04, 0x0C, 0xCE, 0xE4, 0x85, 0xD3};
// pts: static bd_addr_t remote = {0x00, 0x1B, 0xDC, 0x08, 0x0A, 0xA5};
// mac 2013:
// static const char * device_addr_string = "84:38:35:65:d1:15";
// iPhone 5S: static const char * device_addr_string = "54:E4:3A:26:A2:39";
// phone 2013:
static const char * device_addr_string = "D8:BB:2C:DF:F1:08";
static bd_addr_t device_addr;
#endif
static uint16_t avrcp_cid = 0;
static uint8_t avrcp_connected = 0;
static uint16_t browsing_cid = 0;
static uint8_t avrcp_browsing_connected = 0;
static uint8_t sdp_avrcp_browsing_controller_service_buffer[200];
static uint8_t browsing_query_active = 0;
static avrcp_media_item_context_t media_item_context;
typedef struct {
uint16_t charset;
uint8_t depth;
uint16_t name_len;
char name[AVRCP_BROWSING_MAX_FOLDER_NAME_LEN];
} avrcp_browsing_root_folder_t;
typedef struct {
uint8_t uid[8];
uint16_t name_len;
char name[AVRCP_BROWSING_MAX_FOLDER_NAME_LEN];
} avrcp_browsing_folders_t;
static uint8_t parent_folder_set = 0;
static uint8_t parent_folder_uid[8];
static char parent_folder_name[AVRCP_BROWSING_MAX_FOLDER_NAME_LEN];
static avrcp_browsing_folders_t folders[AVRCP_BROWSING_MAX_FOLDERS];
static int folder_index = -1;
static uint16_t players[AVRCP_BROWSING_MAX_PLAYERS];
static int player_index = -1;
static btstack_packet_callback_registration_t hci_event_callback_registration;
static uint8_t ertm_buffer[10000];
static l2cap_ertm_config_t ertm_config = {
1, // ertm mandatory
2, // max transmit, some tests require > 1
2000,
12000,
144, // l2cap ertm mtu
4,
4,
};
static inline int next_index(int * index, int max_value){
if ((*index) < max_value){
(*index)++;
} else {
(*index) = 0;
}
return (*index);
}
static int next_folder_index(){
return next_index(&folder_index, AVRCP_BROWSING_MAX_FOLDERS);
}
static int next_player_index(){
return next_index(&player_index, AVRCP_BROWSING_MAX_PLAYERS);
}
/* @section Main Application Setup
*
* @text The Listing MainConfiguration shows how to setup AVRCP Controller Browsing service.
* To announce AVRCP Controller Browsing service, you need to create corresponding
* SDP record and register it with the SDP service.
* You'll also need to register several packet handlers:
* - stdin_process callback - used to trigger AVRCP commands, such are get media players, playlists, albums, etc. Requires HAVE_BTSTACK_STDIN.
* - avrcp_browsing_controller_packet_handler - used to receive answers for AVRCP commands.
*
*/
/* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP Controller services */
static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
#ifdef HAVE_BTSTACK_STDIN
static void stdin_process(char cmd);
#endif
#define BROWSING_ENABLED 1
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void)argc;
(void)argv;
// Register for HCI events.
hci_event_callback_registration.callback = &avrcp_browsing_controller_packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
// Initialize L2CAP.
l2cap_init();
// Initialize AVRCP Controller.
avrcp_controller_init();
// Register AVRCP for HCI events.
avrcp_controller_register_packet_handler(&avrcp_browsing_controller_packet_handler);
// Initialize AVRCP Browsing Controller, HCI events will be sent to the AVRCP Controller callback.
avrcp_browsing_controller_init();
// // Register AVRCP for HCI events.
// avrcp_browsing_controller_register_packet_handler(&avrcp_browsing_controller_packet_handler);
// Initialize SDP.
sdp_init();
// Create AVRCP service record and register it with SDP.
memset(sdp_avrcp_browsing_controller_service_buffer, 0, sizeof(sdp_avrcp_browsing_controller_service_buffer));
avrcp_controller_create_sdp_record(sdp_avrcp_browsing_controller_service_buffer, 0x10001, BROWSING_ENABLED, 1, NULL, NULL);
sdp_register_service(sdp_avrcp_browsing_controller_service_buffer);
// Set local name with a template Bluetooth address, that will be automatically
// replaced with a actual address once it is available, i.e. when BTstack boots
// up and starts talking to a Bluetooth module.
gap_set_local_name("AVRCP Browsing Client 00:00:00:00:00:00");
gap_discoverable_control(1);
gap_set_class_of_device(0x200408);
#ifdef HAVE_BTSTACK_STDIN
// Parse human readable Bluetooth address.
sscanf_bd_addr(device_addr_string, device_addr);
btstack_stdin_setup(stdin_process);
#endif
printf("Starting BTstack ...\n");
hci_power_control(HCI_POWER_ON);
return 0;
}
/* LISTING_END */
static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
int pos;
switch(packet_type){
case AVRCP_BROWSING_DATA_PACKET:
pos = 0;
browsing_query_active = 1;
avrcp_browsing_item_type_t data_type = (avrcp_browsing_item_type_t)packet[pos++];
pos += 2; // length
switch (data_type){
case AVRCP_BROWSING_MEDIA_ROOT_FOLDER:{
avrcp_browsing_root_folder_t root_folder;
root_folder.charset = big_endian_read_16(packet, pos);
pos += 2;
root_folder.depth = packet[pos++];
root_folder.name_len = big_endian_read_16(packet, pos);
pos += 2;
memset(root_folder.name, 0, AVRCP_BROWSING_MAX_FOLDER_NAME_LEN);
root_folder.name_len = btstack_min(big_endian_read_16(packet, pos), AVRCP_BROWSING_MAX_FOLDER_NAME_LEN - 1);
memcpy(root_folder.name, packet+pos, root_folder.name_len);
printf("Found root folder: name %s, depth %d \n", (char *)root_folder.name, root_folder.depth);
break;
}
case AVRCP_BROWSING_MEDIA_PLAYER_ITEM:{
printf("Received media player: ");
uint16_t player_id = big_endian_read_16(packet, pos);
pos += 2;
avrcp_browsing_media_player_major_type_t major_type = packet[pos++];
avrcp_browsing_media_player_subtype_t subtype = big_endian_read_32(packet, pos);
pos += 4;
uint8_t status = packet[pos++];
uint8_t feature_bitmask[16];
memcpy(feature_bitmask, packet, 16);
pos += 16;
printf("player ID 0x%04x, major_type %d, subtype %d, status %d\n", player_id, major_type, subtype, status);
players[next_player_index()] = player_id;
break;
}
case AVRCP_BROWSING_FOLDER_ITEM:{
int index = next_folder_index();
// printf("Found folder [%d]: ", index);
memcpy(folders[index].uid, packet+pos, 8);
uint32_t folder_uid_high = big_endian_read_32(packet, pos);
pos += 4;
uint32_t folder_uid_low = big_endian_read_32(packet, pos);
pos += 4;
avrcp_browsing_folder_type_t folder_type = packet[pos++];
uint8_t is_playable = packet[pos++];
uint16_t charset = big_endian_read_16(packet, pos);
pos += 2;
uint16_t displayable_name_length = big_endian_read_16(packet, pos);
pos += 2;
char value[AVRCP_BROWSING_MAX_FOLDER_NAME_LEN];
memset(value, 0, AVRCP_BROWSING_MAX_FOLDER_NAME_LEN);
uint16_t value_len = btstack_min(displayable_name_length, AVRCP_BROWSING_MAX_FOLDER_NAME_LEN - 1);
memcpy(value, packet+pos, value_len);
printf("UID 0x%08" PRIx32 "%08" PRIx32 ", type 0x%02x, is_playable %d, charset 0x%02x, name %s\n",
folder_uid_high, folder_uid_low, folder_type, is_playable, charset, value);
memcpy(folders[index].name, value, value_len);
folders[index].name_len = value_len;
break;
}
case AVRCP_BROWSING_MEDIA_ELEMENT_ITEM:{
printf("Found media: ");
uint32_t media_uid_high = big_endian_read_32(packet, pos);
pos += 4;
uint32_t media_uid_low = big_endian_read_32(packet, pos+4);
pos += 4;
avrcp_browsing_media_type_t media_type = packet[pos++];
uint16_t charset = big_endian_read_16(packet, pos);
pos += 2;
uint16_t displayable_name_length = big_endian_read_16(packet, pos);
pos += 2;
pos += displayable_name_length;
printf("Media UID: 0x%08" PRIx32 "%08" PRIx32 ", media_type 0x%02x, charset 0x%02x, displayable_name_length %d\n", media_uid_high, media_uid_low, media_type, charset, displayable_name_length);
uint8_t num_attributes = packet[pos++];
printf("Num media attributes %d\n", num_attributes);
for (avrcp_media_item_iterator_init(&media_item_context, size-pos, packet+pos); avrcp_media_item_iterator_has_more(&media_item_context); avrcp_media_item_iterator_next(&media_item_context)){
uint32_t attr_id = avrcp_media_item_iterator_get_attr_id(&media_item_context);
uint16_t attr_charset = avrcp_media_item_iterator_get_attr_charset(&media_item_context);
uint16_t attr_value_length = avrcp_media_item_iterator_get_attr_value_len(&media_item_context);
const uint8_t * attr_value = avrcp_media_item_iterator_get_attr_value(&media_item_context);
printf("Attr ID 0x%08" PRIx32 ", charset %d, attr_value_length %d, value %s", attr_id, attr_charset, attr_value_length, attr_value);
}
break;
}
default:
log_error("AVRCP browsing: unknown browsable item type 0%02x", data_type);
break;
}
break;
case HCI_EVENT_PACKET:
if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return;
uint16_t local_cid;
uint8_t status = 0xFF;
bd_addr_t address;
switch (packet[2]){
case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: {
local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet);
if (browsing_cid != 0 && browsing_cid != local_cid) {
printf("AVRCP Controller connection failed, expected 0x%02X l2cap cid, received 0x%02X\n", browsing_cid, local_cid);
return;
}
status = avrcp_subevent_connection_established_get_status(packet);
if (status != ERROR_CODE_SUCCESS){
printf("AVRCP Controller connection failed: status 0x%02x\n", status);
browsing_cid = 0;
return;
}
avrcp_cid = local_cid;
avrcp_connected = 1;
avrcp_subevent_connection_established_get_bd_addr(packet, address);
printf("AVRCP Controller connected.\n");
return;
}
case AVRCP_SUBEVENT_CONNECTION_RELEASED:
printf("AVRCP Browsing Client released.\n");
browsing_cid = 0;
avrcp_browsing_connected = 0;
folder_index = 0;
memset(folders, 0, sizeof(folders));
return;
case AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED: {
local_cid = avrcp_subevent_browsing_connection_established_get_browsing_cid(packet);
if (browsing_cid != 0 && browsing_cid != local_cid) {
printf("AVRCP Browsing Client connection failed, expected 0x%02X l2cap cid, received 0x%02X\n", browsing_cid, local_cid);
return;
}
status = avrcp_subevent_browsing_connection_established_get_status(packet);
if (status != ERROR_CODE_SUCCESS){
printf("AVRCP Browsing Client connection failed: status 0x%02x\n", status);
browsing_cid = 0;
return;
}
browsing_cid = local_cid;
avrcp_browsing_connected = 1;
avrcp_subevent_browsing_connection_established_get_bd_addr(packet, address);
printf("AVRCP Browsing Client connected\n");
return;
}
case AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED:
printf("AVRCP Browsing Client released\n");
browsing_cid = 0;
avrcp_browsing_connected = 0;
return;
case AVRCP_SUBEVENT_BROWSING_MEDIA_ITEM_DONE:
browsing_query_active = 0;
if (avrcp_subevent_browsing_media_item_done_get_browsing_status(packet) != AVRCP_BROWSING_ERROR_CODE_SUCCESS){
printf("AVRCP Browsing query done with browsing status 0x%02x, bluetooth status 0x%02x.\n",
avrcp_subevent_browsing_media_item_done_get_browsing_status(packet),
avrcp_subevent_browsing_media_item_done_get_bluetooth_status(packet));
break;
}
printf("AVRCP Browsing cmd: DONE.\n");
break;
default:
printf("AVRCP Browsing Client: event is not parsed\n");
break;
}
break;
default:
break;
}
}
#ifdef HAVE_BTSTACK_STDIN
static void show_usage(void){
bd_addr_t iut_address;
gap_local_bd_addr(iut_address);
printf("\n--- Bluetooth AVRCP Controller Connection Test Console %s ---\n", bd_addr_to_str(iut_address));
printf("c - AVRCP Controller create connection to addr %s\n", bd_addr_to_str(device_addr));
printf("e - AVRCP Browsing Controller create connection to addr %s\n", bd_addr_to_str(device_addr));
printf("E - AVRCP Browsing Controller disconnect\n");
printf("C - AVRCP Controller disconnect\n");
printf("I - Set first found player as addressed player\n");
printf("O - Set first found player as browsed player\n");
printf("p - Get media players\n");
printf("Q - Browse folders\n");
printf("P - Go up one level\n");
printf("W - Go down one level\n");
printf("T - Browse media items\n");
printf("---\n");
}
#endif
#ifdef HAVE_BTSTACK_STDIN
static void stdin_process(char cmd){
uint8_t status = ERROR_CODE_SUCCESS;
if (cmd != 'a' && cmd != 'A' && cmd != 'c' && cmd != 'C'){
if (browsing_query_active){
printf("Query active, try later!\n");
return;
}
}
switch (cmd){
case 'c':
printf(" - Create AVRCP connection for control to addr %s.\n", bd_addr_to_str(device_addr));
status = avrcp_controller_connect(device_addr, &avrcp_cid);
break;
case 'C':
if (avrcp_connected){
printf(" - AVRCP Controller disconnect from addr %s.\n", bd_addr_to_str(device_addr));
status = avrcp_controller_disconnect(avrcp_cid);
break;
}
printf("AVRCP Controller already disconnected\n");
break;
case 'e':
if (!avrcp_connected) {
printf(" You must first create AVRCP connection for control to addr %s.\n", bd_addr_to_str(device_addr));
break;
}
printf(" - Create AVRCP connection for browsing to addr %s.\n", bd_addr_to_str(device_addr));
status = avrcp_browsing_controller_connect(device_addr, ertm_buffer, sizeof(ertm_buffer), &ertm_config, &browsing_cid);
break;
case 'E':
if (avrcp_browsing_connected){
printf(" - AVRCP Browsing Controller disconnect from addr %s.\n", bd_addr_to_str(device_addr));
status = avrcp_browsing_controller_disconnect(browsing_cid);
break;
}
printf("AVRCP Browsing Controller already disconnected\n");
break;
case '\n':
case '\r':
break;
default:
if (!avrcp_browsing_connected){
show_usage();
printf("Please connect the AVRCP Browsing client\n");
break;
}
switch (cmd) {
case 'I':
if (player_index < 0) {
printf("Get media players first\n");
break;
}
printf("Set addressed player\n");
status = avrcp_browsing_controller_set_addressed_player(browsing_cid, players[0]);
break;
case 'O':
if (player_index < 0) {
printf("Get media players first\n");
break;
}
printf("Set browsed player\n");
status = avrcp_browsing_controller_set_browsed_player(browsing_cid, players[0]);
break;
case 'p':
printf("AVRCP Browsing: get media players\n");
player_index = -1;
status = avrcp_browsing_controller_get_media_players(browsing_cid, 0, 0xFFFFFFFF, AVRCP_MEDIA_ATTR_ALL);
break;
case 'Q':
printf("AVRCP Browsing: browse folders\n");
folder_index = -1;
status = avrcp_browsing_controller_browse_file_system(browsing_cid, 0, 0xFFFFFFFF, AVRCP_MEDIA_ATTR_ALL);
break;
case 'P':
printf("AVRCP Browsing: browse media items\n");
avrcp_browsing_controller_browse_media(browsing_cid, 0, 0xFFFFFFFF, AVRCP_MEDIA_ATTR_ALL);
break;
case 'W':
printf("AVRCP Browsing: go up one level\n");
status = avrcp_browsing_controller_go_up_one_level(browsing_cid);
folder_index = -1;
break;
case 'T':
if (folder_index < 0 && !parent_folder_set){
printf("AVRCP Browsing: no folders available\n");
break;
}
if (!parent_folder_set){
parent_folder_set = 1;
memcpy(parent_folder_name, folders[0].name, folders[0].name_len);
memcpy(parent_folder_uid, folders[0].uid, 8);
}
printf("AVRCP Browsing: go down one level of %s\n", (char *)parent_folder_name);
status = avrcp_browsing_controller_go_down_one_level(browsing_cid, parent_folder_uid);
folder_index = -1;
break;
default:
show_usage();
break;
}
break;
}
if (status != ERROR_CODE_SUCCESS){
printf("Could not perform command, status 0x%2x\n", status);
}
}
#endif
/* EXAMPLE_END */
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