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exmaple/a2dp: improve example annotation

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This commit is contained in:
Milanka Ringwald 2020-06-23 11:57:59 +02:00
parent fb944a68cb
commit 69f3ffd7c7
3 changed files with 73 additions and 53 deletions
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8
example/a2dp_sink_demo.c
View File

@ -197,7 +197,7 @@ static btstack_resample_t resample_instance;
* - avrcp_packet_handler - receives connect/disconnect event.
* - avrcp_controller_packet_handler - receives answers for sent AVRCP commands.
* - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications.
* - stdin_process callback - used to trigger AVRCP commands to the A2DP Source device, such are get now playing info, start, stop, volume control. Requires HAVE_BTSTACK_STDIN.
* - stdin_process - used to trigger AVRCP commands to the A2DP Source device, such are get now playing info, start, stop, volume control. Requires HAVE_BTSTACK_STDIN.
*
* @text To announce A2DP Sink and AVRCP services, you need to create corresponding
* SDP records and register them with the SDP service.
@ -210,15 +210,17 @@ static btstack_resample_t resample_instance;
*/
/* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP Controller services */
static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size);
static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size);
static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void hci_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
static int a2dp_and_avrcp_setup(void){
l2cap_init();
// Initialize AVDTP Sink
a2dp_sink_init();

112
example/a2dp_source_demo.c
View File

@ -44,17 +44,17 @@
// *****************************************************************************
/* EXAMPLE_START(a2dp_source_demo): Serve audio stream and handle remote playback control and queries.
*
* @text This A2DP Source example demonstrates how to send an audio data stream
* @text This A2DP Source example demonstrates how to send an audio data stream
* to a remote A2DP Sink device and how to switch between two audio data sources.
* In addition, the AVRCP Target is used to answer queries on currently played media,
* as well as to handle remote playback control, i.e. play, stop, repeat, etc.
* as well as to handle remote playback control, i.e. play, stop, repeat, etc. If HAVE_BTSTACK_STDIN
* is set, press SPACE on the console to show the available AVDTP and AVRCP commands.
*
* @test To test with a remote device, e.g. a Bluetooth speaker,
* @text To test with a remote device, e.g. a Bluetooth speaker,
* set the device_addr_string to the Bluetooth address of your
* remote device in the code, and use the UI to connect and start playback.
* Tap SPACE on the console to show the available commands.
*
* For more info on BTstack audio, see our blog post
* @text For more info on BTstack audio, see our blog post
* [A2DP Sink and Source on STM32 F4 Discovery Board](http://bluekitchen-gmbh.com/a2dp-sink-and-source-on-stm32-f4-discovery-board/).
*
*/
@ -173,8 +173,8 @@ static const char * device_addr_string = "00:21:3C:AC:F7:38";
// Sony MDR-ZX330BT static const char * device_addr_string = "00:18:09:28:50:18";
// Panda (BM6) static const char * device_addr_string = "4F:3F:66:52:8B:E0";
// BeatsX: static const char * device_addr_string = "DC:D3:A2:89:57:FB";
static bd_addr_t device_addr;
static uint8_t sdp_a2dp_source_service_buffer[150];
static uint8_t sdp_avrcp_target_service_buffer[200];
static uint8_t sdp_avrcp_controller_service_buffer[200];
@ -207,8 +207,8 @@ static const uint8_t subunit_info[] = {
};
static uint32_t company_id = 0x112233;
static uint8_t companies_num = 1;
static uint8_t companies[] = {
static uint8_t companies_num = 1;
static uint8_t companies[] = {
0x00, 0x19, 0x58 //BT SIG registered CompanyID
};
@ -251,10 +251,21 @@ avrcp_play_status_info_t play_info;
/* @section Main Application Setup
*
* @text The Listing MainConfiguration shows how to setup AD2P Source and AVRCP Target services.
* @text The Listing MainConfiguration shows how to setup AD2P Source and AVRCP services.
* Besides calling init() method for each service, you'll also need to register several packet handlers:
* - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code.
* - a2dp_source_packet_handler - handles events on stream connection status (established, released), the media codec configuration, and, the commands on stream itself (open, pause, stopp).
* - avrcp_packet_handler - receives connect/disconnect event.
* - avrcp_controller_packet_handler - receives answers for sent AVRCP commands.
* - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications.
* - stdin_process - used to trigger AVRCP commands to the A2DP Source device, such are get now playing info, start, stop, volume control. Requires HAVE_BTSTACK_STDIN.
*
* @text To announce A2DP Source and AVRCP services, you need to create corresponding
* SDP records and register them with the SDP service.
*/
/* LISTING_START(MainConfiguration): Setup Audio Source and AVRCP Target services */
static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size);
static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
@ -263,24 +274,9 @@ static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channe
static void stdin_process(char cmd);
#endif
static void a2dp_demo_reconfigure_sample_rate(int new_sample_rate){
if (!hxcmod_initialized){
hxcmod_initialized = hxcmod_init(&mod_context);
if (!hxcmod_initialized) {
printf("could not initialize hxcmod\n");
return;
}
}
sample_rate = new_sample_rate;
media_tracker.sbc_storage_count = 0;
media_tracker.samples_ready = 0;
hxcmod_unload(&mod_context);
hxcmod_setcfg(&mod_context, sample_rate, 16, 1, 1, 1);
hxcmod_load(&mod_context, (void *) &mod_data, mod_len);
}
static void a2dp_demo_reconfigure_sample_rate(int new_sample_rate);
static int a2dp_source_and_avrcp_services_init(void){
// request role change on reconnecting headset to always use them in slave mode
hci_set_master_slave_policy(0);
@ -298,6 +294,7 @@ static int a2dp_source_and_avrcp_services_init(void){
media_tracker.local_seid = avdtp_local_seid(local_stream_endpoint);
avdtp_source_register_delay_reporting_category(media_tracker.local_seid);
// Initialize AVRCP Service.
avrcp_init();
avrcp_register_packet_handler(&avrcp_packet_handler);
// Initialize AVRCP Target.
@ -338,21 +335,36 @@ static int a2dp_source_and_avrcp_services_init(void){
gap_set_class_of_device(0x200408);
// Register for HCI events.
hci_event_callback_registration.callback = &a2dp_source_packet_handler;
hci_event_callback_registration.callback = &hci_packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
a2dp_demo_reconfigure_sample_rate(sample_rate);
#ifdef HAVE_BTSTACK_STDIN
// Parse human readable Bluetooth address.
sscanf_bd_addr(device_addr_string, device_addr);
#ifdef HAVE_BTSTACK_STDIN
btstack_stdin_setup(stdin_process);
#endif
return 0;
}
/* LISTING_END */
static void a2dp_demo_reconfigure_sample_rate(int new_sample_rate){
if (!hxcmod_initialized){
hxcmod_initialized = hxcmod_init(&mod_context);
if (!hxcmod_initialized) {
printf("could not initialize hxcmod\n");
return;
}
}
sample_rate = new_sample_rate;
media_tracker.sbc_storage_count = 0;
media_tracker.samples_ready = 0;
hxcmod_unload(&mod_context);
hxcmod_setcfg(&mod_context, sample_rate, 16, 1, 1, 1);
hxcmod_load(&mod_context, (void *) &mod_data, mod_len);
}
static void a2dp_demo_send_media_packet(void){
int num_bytes_in_frame = btstack_sbc_encoder_sbc_buffer_length();
int bytes_in_storage = media_tracker.sbc_storage_count;
@ -505,6 +517,31 @@ static void dump_sbc_configuration(avdtp_media_codec_configuration_sbc_t * confi
printf(" - bitpool_value [%d, %d] \n", configuration->min_bitpool_value, configuration->max_bitpool_value);
}
static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
if (packet_type != HCI_EVENT_PACKET) return;
#ifndef HAVE_BTSTACK_STDIN
if (hci_event_packet_get_type(packet) == BTSTACK_EVENT_STATE){
if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) return;
printf("Create A2DP Source connection to addr %s.\n", bd_addr_to_str(device_addr));
uint8_t status = a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid);
if (status != ERROR_CODE_SUCCESS){
printf("Could not perform command, status 0x%2x\n", status);
}
return;
}
#endif
if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) {
bd_addr_t address;
printf("Pin code request - using '0000'\n");
hci_event_pin_code_request_get_bd_addr(packet, address);
gap_pin_code_response(address, "0000");
}
}
static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
@ -514,25 +551,6 @@ static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, ui
uint16_t cid;
if (packet_type != HCI_EVENT_PACKET) return;
#ifndef HAVE_BTSTACK_STDIN
if (hci_event_packet_get_type(packet) == BTSTACK_EVENT_STATE){
if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) return;
printf("Create A2DP Source connection to addr %s.\n", bd_addr_to_str(device_addr));
status = a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid);
if (status != ERROR_CODE_SUCCESS){
printf("Could not perform command, status 0x%2x\n", status);
}
return;
}
#endif
if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) {
printf("Pin code request - using '0000'\n");
hci_event_pin_code_request_get_bd_addr(packet, address);
gap_pin_code_response(address, "0000");
return;
}
if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return;
switch (hci_event_a2dp_meta_get_subevent_code(packet)){

6
example/avrcp_browsing_client.c
View File

@ -47,9 +47,9 @@
* @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).
* @text 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. If HAVE_BTSTACK_STDIN is set,
* press SPACE on the console to show the available AVDTP and AVRCP commands.
*
*/
// *****************************************************************************