mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-03-25 16:43:28 +00:00
Code Issues Packages Projects Releases Wiki Activity
btstack/src/classic/a2dp_source.c
Matthias Ringwald e883851f1d fix warnings for log_info/printf
2020-11-30 11:59:26 +01:00

786 lines
38 KiB
C
Raw Blame History

/*
* 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
*
*/
/**
* Supported use cases:
* - single incoming connection: sep discovery starts and stream will get setup if remote sink sep with SBC is found
* - single outgoing connection: see above
* - outgoing and incoming connection to same device:
* - if outgoing is triggered first, incoming will get ignored.
* - if incoming starts first, start ougoing will fail, but incoming will succeed.
* - outgoing and incoming connections to different devices:
* - if outgoing is first, incoming gets ignored.
* - if incoming starts first SEP discovery will get stopped and outgoing will succeed.
*/
#define BTSTACK_FILE__ "a2dp_source.c"
#include <stdint.h>
#include <string.h>
#include "bluetooth_psm.h"
#include "bluetooth_sdp.h"
#include "btstack_debug.h"
#include "btstack_event.h"
#include "classic/a2dp_source.h"
#include "classic/avdtp_source.h"
#include "classic/avdtp_util.h"
#include "classic/sdp_util.h"
#include "l2cap.h"
#define AVDTP_MAX_SEP_NUM 10
#define A2DP_SET_CONFIG_DELAY_MS 150
static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service";
static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider";
static bool sep_found_w2_set_configuration = false;
static btstack_timer_source_t a2dp_source_set_config_timer;
//
static bool outgoing_active;
// discover remote seps
static a2dp_state_t a2dp_source_state = A2DP_IDLE;
static uint16_t a2dp_source_cid;
static uint16_t num_remote_seps = 0;
static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM];
static bool stream_endpoint_configured = false;
static avdtp_stream_endpoint_context_t sc;
static btstack_packet_handler_t a2dp_source_packet_handler_user;
static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void a2dp_discover_seps_with_next_waiting_connection(void);
static void a2dp_source_streaming_emit_connection_failed(avdtp_connection_t * connection, uint8_t local_seid, uint8_t status) {
uint8_t event[14];
int pos = 0;
event[pos++] = HCI_EVENT_A2DP_META;
event[pos++] = sizeof(event) - 2;
event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED;
little_endian_store_16(event, pos, connection->avdtp_cid);
pos += 2;
reverse_bd_addr(connection->remote_addr, &event[pos]);
pos += 6;
event[pos++] = local_seid;
event[pos++] = 0;
event[pos++] = status;
(*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
void a2dp_source_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){
uint8_t* attribute;
de_create_sequence(service);
// 0x0000 "Service Record Handle"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE);
de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle);
// 0x0001 "Service Class ID List"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST);
attribute = de_push_sequence(service);
{
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE);
}
de_pop_sequence(service, attribute);
// 0x0004 "Protocol Descriptor List"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST);
attribute = de_push_sequence(service);
{
uint8_t* l2cpProtocol = de_push_sequence(attribute);
{
de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP);
de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP);
}
de_pop_sequence(attribute, l2cpProtocol);
uint8_t* avProtocol = de_push_sequence(attribute);
{
de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service
de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version
}
de_pop_sequence(attribute, avProtocol);
}
de_pop_sequence(service, attribute);
// 0x0005 "Public Browse Group"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group
attribute = de_push_sequence(service);
{
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT);
}
de_pop_sequence(service, attribute);
// 0x0009 "Bluetooth Profile Descriptor List"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST);
attribute = de_push_sequence(service);
{
uint8_t *a2dProfile = de_push_sequence(attribute);
{
de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION);
de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103);
}
de_pop_sequence(attribute, a2dProfile);
}
de_pop_sequence(service, attribute);
// 0x0100 "Service Name"
de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100);
if (service_name){
de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name);
} else {
de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name);
}
// 0x0100 "Provider Name"
de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102);
if (service_provider_name){
de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name);
} else {
de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name);
}
// 0x0311 "Supported Features"
de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311);
de_add_number(service, DE_UINT, DE_SIZE_16, supported_features);
}
static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){
uint8_t event[7];
int pos = 0;
event[pos++] = HCI_EVENT_A2DP_META;
event[pos++] = sizeof(event) - 2;
event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED;
little_endian_store_16(event, pos, cid);
pos += 2;
event[pos++] = local_seid;
event[pos++] = status;
(*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static void a2dp_source_discover_stream_endpoints(uint16_t avdtp_cid){
a2dp_source_cid = avdtp_cid;
avdtp_source_discover_stream_endpoints(avdtp_cid);
}
static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){
if (stream_endpoint_configured) return;
uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer);
avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid);
btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL);
if (connection == NULL) {
log_info("a2dp_discover_seps_with_next_waiting_connection");
a2dp_discover_seps_with_next_waiting_connection();
return;
}
a2dp_source_discover_stream_endpoints(avdtp_cid);
}
static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){
log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid);
btstack_run_loop_remove_timer(&a2dp_source_set_config_timer);
btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler);
btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS);
btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid);
btstack_run_loop_add_timer(&a2dp_source_set_config_timer);
}
static void a2dp_source_set_config_timer_stop(void){
log_info("a2dp_source_set_config_timer_stop");
btstack_run_loop_remove_timer(&a2dp_source_set_config_timer);
btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL);
}
static void a2dp_start_discovering_seps(avdtp_connection_t * connection){
a2dp_source_state = A2DP_DISCOVER_SEPS;
sc.active_remote_sep_index = 0;
num_remote_seps = 0;
memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM);
connection->a2dp_source_discover_seps = false;
// if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first
if (outgoing_active && (a2dp_source_cid == connection->avdtp_cid)){
log_info("discover seps");
a2dp_source_discover_stream_endpoints(connection->avdtp_cid);
} else {
log_info("wait a bit, then discover seps");
a2dp_source_set_config_timer_start(connection->avdtp_cid);
}
}
static void a2dp_discover_seps_with_next_waiting_connection(void){
a2dp_source_state = A2DP_IDLE;
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, avdtp_get_connections());
while (btstack_linked_list_iterator_has_next(&it)){
avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it);
if (!next_connection->a2dp_source_discover_seps) continue;
a2dp_start_discovering_seps(next_connection);
}
}
static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
uint16_t cid;
avdtp_connection_t * connection;
uint8_t signal_identifier;
uint8_t status;
uint8_t remote_seid;
if (packet_type != HCI_EVENT_PACKET) return;
if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return;
switch (packet[2]){
case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:
if (sc.local_stream_endpoint == NULL) return;
cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet);
connection = avdtp_get_connection_for_avdtp_cid(cid);
btstack_assert(connection != NULL);
status = avdtp_subevent_signaling_connection_established_get_status(packet);
if (status != ERROR_CODE_SUCCESS){
// notify about connection error only if we're initiator
if (outgoing_active && (a2dp_source_cid == cid)){
log_info("A2DP source signaling connection failed status 0x%02x", status);
outgoing_active = false;
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED);
}
break;
}
log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid);
// notify app
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED);
// we already have a valid setup
if (stream_endpoint_configured) return;
// start discover seps now if:
// - outgoing active: signaling for outgoing connection
// - outgoing not active: incoming connection and no sep discover ongoing
log_info("outgoing_active %d, current avdtp cid 0x%02x, a2dp_source_state %d", outgoing_active, cid, a2dp_source_state);
if ((outgoing_active && (a2dp_source_cid == cid)) || (!outgoing_active && (a2dp_source_state == A2DP_IDLE))){
a2dp_start_discovering_seps(connection);
} else {
// post-pone sep discovery
connection->a2dp_source_discover_seps = true;
}
break;
case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:
cid = avdtp_subevent_signaling_sep_found_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
if (a2dp_source_state == A2DP_DISCOVER_SEPS) {
avdtp_sep_t sep;
sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);;
sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet);
sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet);
sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet);
log_info("A2DP Found sep: remote seid 0x%02x, in_use %d, media type %d, sep type %s, index %d",
sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink",
num_remote_seps);
if (sep.type == AVDTP_SINK) {
remote_seps[num_remote_seps++] = sep;
}
}
break;
case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE:
cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
if (a2dp_source_state != A2DP_DISCOVER_SEPS) break;
connection = avdtp_get_connection_for_avdtp_cid(cid);
btstack_assert(connection != NULL);
if (num_remote_seps > 0){
a2dp_source_state = A2DP_GET_CAPABILITIES;
connection->supported_codecs_bitmap = 0;
sc.active_remote_sep_index = 0;
} else {
if (outgoing_active){
outgoing_active = false;
connection = avdtp_get_connection_for_avdtp_cid(cid);
btstack_assert(connection != NULL);
a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND);
}
// continue
a2dp_discover_seps_with_next_waiting_connection();
}
break;
case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:
cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
if (a2dp_source_state == A2DP_GET_CAPABILITIES) {
log_info("A2DP received SBC capability, received: remote seid 0x%02x (expected: remote seid 0x%02x)",
avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), remote_seps[sc.active_remote_sep_index].seid);
connection = avdtp_get_connection_for_avdtp_cid(cid);
btstack_assert(connection != NULL);
// choose SBC config params
uint8_t sampling_frequency = avdtp_choose_sbc_sampling_frequency(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet));
uint8_t channel_mode = avdtp_choose_sbc_channel_mode(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet));
uint8_t block_length = avdtp_choose_sbc_block_length(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_block_length_bitmap(packet));
uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet));
uint8_t allocation_method = avdtp_choose_sbc_allocation_method(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet));
uint8_t max_bitpool_value = avdtp_choose_sbc_max_bitpool_value(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet));
uint8_t min_bitpool_value = avdtp_choose_sbc_min_bitpool_value(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet));
// set media configuration
sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1);
sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO;
sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC;
// select reserved SBC config buffer
sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->media_codec_sbc_info;
sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 4;
// store SBC configuration in reserved field
sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode;
sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method;
sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value;
sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value;
// suitable Sink SEP found, configure SEP
sep_found_w2_set_configuration = true;
connection->supported_codecs_bitmap |= (1 << AVDTP_CODEC_SBC);
}
break;
case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY:
log_info("received non SBC codec. not implemented");
break;
case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY:
log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_media_transport_capability_get_remote_seid(packet));
break;
case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY:
log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet));
break;
case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY:
log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet));
break;
case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY:
log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_content_protection_capability_get_remote_seid(packet));
break;
case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY:
log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_header_compression_capability_get_remote_seid(packet));
break;
case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY:
log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet));
break;
case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY:
cid = avdtp_subevent_signaling_delay_reporting_capability_get_avdtp_cid(packet);
log_info("received AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, cid 0x%02x, state %d", cid, a2dp_source_state);
if (a2dp_source_cid != cid) break;
if (a2dp_source_state != A2DP_GET_CAPABILITIES) break;
sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_DELAY_REPORTING, 1);
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY);
break;
case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE:
cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
if (a2dp_source_state != A2DP_GET_CAPABILITIES) break;
if (sep_found_w2_set_configuration){
a2dp_source_state = A2DP_SET_CONFIGURATION;
sep_found_w2_set_configuration = false;
break;
}
// endpoint was not suitable, check next one
sc.active_remote_sep_index++;
if (sc.active_remote_sep_index >= num_remote_seps){
// we didn't find a suitable SBC stream endpoint, sorry.
if (outgoing_active){
outgoing_active = false;
connection = avdtp_get_connection_for_avdtp_cid(cid);
btstack_assert(connection != NULL);
a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND);
}
a2dp_discover_seps_with_next_waiting_connection();
}
break;
case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT:
cid = avdtp_subevent_signaling_delay_report_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT);
break;
case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:
cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet);
if ((a2dp_source_cid == cid) && (a2dp_source_state == A2DP_W4_SET_CONFIGURATION)){
// outgoing: discovery and config of remote sink sep successful, trigger stream open
a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID;
} else {
// incoming: accept cid and wait for stream open
a2dp_source_cid = cid;
a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID;
}
// config set: stop timer
a2dp_source_set_config_timer_stop();
stream_endpoint_configured = true;
sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet);
sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet);
sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet);
sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet);
sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet);
sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet);
sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet);
log_info("A2DP received SBC Config: sample rate %u, max bitpool %u., remote seid 0x%02x", sc.sampling_frequency, sc.max_bitpool_value, avdtp_subevent_signaling_media_codec_sbc_configuration_get_remote_seid(packet));
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION);
break;
case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION:
break;
case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW:
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW);
break;
case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED:
cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
if (a2dp_source_state != A2DP_W4_OPEN_STREAM_WITH_SEID) break;
outgoing_active = false;
status = avdtp_subevent_streaming_connection_established_get_status(packet);
if (status != ERROR_CODE_SUCCESS){
log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status);
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED);
break;
}
log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid 0x%02x, remote seid 0x%02x", cid,
avdtp_subevent_streaming_connection_established_get_local_seid(packet),
avdtp_subevent_streaming_connection_established_get_remote_seid(packet));
a2dp_source_state = A2DP_STREAMING_OPENED;
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED);
break;
case AVDTP_SUBEVENT_SIGNALING_ACCEPT:
cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet);
// reset discovery timer while remote is active
if (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) {
uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(&a2dp_source_set_config_timer);
if ((avdtp_cid == 0) || (avdtp_cid != cid)) break;
log_info("Reset discovery timer");
a2dp_source_set_config_timer_start(avdtp_cid);
break;
}
if (a2dp_source_cid != cid) break;
signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet);
log_info("A2DP cmd %s accepted, global state %d, cid 0x%02x", avdtp_si2str(signal_identifier), a2dp_source_state, cid);
switch (a2dp_source_state){
case A2DP_GET_CAPABILITIES:
remote_seid = remote_seps[sc.active_remote_sep_index].seid;
log_info("A2DP get capabilities for remote seid 0x%02x", remote_seid);
avdtp_source_get_all_capabilities(cid, remote_seid);
return;
case A2DP_SET_CONFIGURATION:
remote_seid = remote_seps[sc.active_remote_sep_index].seid;
log_info("A2DP initiate set configuration locally and wait for response ... local seid 0x%02x, remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid);
a2dp_source_state = A2DP_W4_SET_CONFIGURATION;
avdtp_source_set_configuration(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid, sc.local_stream_endpoint->remote_configuration_bitmap, sc.local_stream_endpoint->remote_configuration);
return;
case A2DP_W2_OPEN_STREAM_WITH_SEID:
log_info("A2DP open stream ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid);
a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID;
avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid);
break;
case A2DP_W2_RECONFIGURE_WITH_SEID:
log_info("A2DP reconfigured ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid);
a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS);
a2dp_source_state = A2DP_STREAMING_OPENED;
break;
case A2DP_STREAMING_OPENED:
switch (signal_identifier){
case AVDTP_SI_START:
a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED);
break;
case AVDTP_SI_SUSPEND:
a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED);
break;
case AVDTP_SI_ABORT:
case AVDTP_SI_CLOSE:
a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED);
break;
default:
break;
}
break;
default:
break;
}
break;
case AVDTP_SUBEVENT_SIGNALING_REJECT:
cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break;
a2dp_source_state = A2DP_CONNECTED;
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED);
break;
case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT:
cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break;
a2dp_source_state = A2DP_CONNECTED;
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED);
break;
case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:
cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet);
if (a2dp_source_cid != cid) break;
a2dp_source_state = A2DP_CONFIGURED;
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED);
break;
case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:
cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet);
// connect/release are passed on to app
if (a2dp_source_cid == cid){
stream_endpoint_configured = false;
a2dp_source_state = A2DP_IDLE;
a2dp_source_cid = 0;
}
a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED);
break;
default:
break;
}
}
void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){
btstack_assert(callback != NULL);
avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal);
a2dp_source_packet_handler_user = callback;
}
void a2dp_source_init(void){
avdtp_source_init();
}
avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type,
uint8_t * codec_capabilities, uint16_t codec_capabilities_len,
uint8_t * codec_configuration, uint16_t codec_configuration_len){
avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type);
if (!local_stream_endpoint){
return NULL;
}
avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint));
avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type,
codec_capabilities, codec_capabilities_len);
avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint));
// store user codec configuration buffer
local_stream_endpoint->media_codec_configuration_info = codec_configuration;
local_stream_endpoint->media_codec_configuration_len = codec_configuration_len;
sc.local_stream_endpoint = local_stream_endpoint;
return local_stream_endpoint;
}
void a2dp_source_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){
avdtp_source_finalize_stream_endpoint(stream_endpoint);
}
uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){
if (outgoing_active || stream_endpoint_configured) {
return ERROR_CODE_COMMAND_DISALLOWED;
}
sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid);
if (!sc.local_stream_endpoint){
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
uint16_t outgoing_cid;
outgoing_active = true;
uint8_t status = avdtp_source_connect(remote_addr, &outgoing_cid);
if (status != ERROR_CODE_SUCCESS) {
// if there's already a connection for for remote addr, avdtp_source_connect fails,
// but the stream will get set-up nevertheless
outgoing_active = false;
return status;
}
// stop sep discovery for other
if (a2dp_source_state != A2DP_IDLE){
avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_source_cid);
if (connection != NULL){
// sdp discovery has started: post-pone action, reserve sep discovery mechanism
connection->a2dp_source_discover_seps = true;
}
}
// setup state
a2dp_source_state = A2DP_W4_CONNECTED;
a2dp_source_cid = outgoing_cid;
*avdtp_cid = outgoing_cid;
return ERROR_CODE_SUCCESS;
}
uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){
return avdtp_disconnect(avdtp_cid);
}
uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){
btstack_assert(sc.local_stream_endpoint != NULL);
if (a2dp_source_cid != avdtp_cid){
return ERROR_CODE_COMMAND_DISALLOWED;
}
avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid);
if (connection == NULL){
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
if (a2dp_source_state != A2DP_STREAMING_OPENED) {
return ERROR_CODE_COMMAND_DISALLOWED;
}
log_info("Reconfigure avdtp_cid 0x%02x", avdtp_cid);
(void)memcpy(sc.local_stream_endpoint->media_codec_sbc_info,
sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information,
4);
// update sampling frequency
uint8_t config = sc.local_stream_endpoint->media_codec_sbc_info[0] & 0x0f;
switch (sampling_frequency){
case 48000:
config |= (AVDTP_SBC_48000 << 4);
break;
case 44100:
config |= (AVDTP_SBC_44100 << 4);
break;
case 32000:
config |= (AVDTP_SBC_32000 << 4);
break;
case 16000:
config |= (AVDTP_SBC_16000 << 4);
break;
default:
log_error("Unsupported sampling frequency %u", (int) sampling_frequency);
return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE;
}
sc.local_stream_endpoint->media_codec_sbc_info[0] = config;
avdtp_capabilities_t new_configuration;
new_configuration.media_codec.media_type = AVDTP_AUDIO;
new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC;
new_configuration.media_codec.media_codec_information_len = 4;
new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->media_codec_sbc_info;
// start reconfigure
a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID;
return avdtp_source_reconfigure(
avdtp_cid,
avdtp_stream_endpoint_seid(sc.local_stream_endpoint),
sc.local_stream_endpoint->remote_sep.seid,
1 << AVDTP_MEDIA_CODEC,
new_configuration
);
}
uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){
return avdtp_start_stream(avdtp_cid, local_seid);
}
uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){
return avdtp_suspend_stream(avdtp_cid, local_seid);
}
void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){
avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid);
}
int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){
return avdtp_max_media_payload_size(avdtp_cid, local_seid);
}
int a2dp_source_stream_send_media_payload(uint16_t avdtp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){
return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker);
}
Reference in New Issue View Git Blame Copy Permalink