/* * 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 #include #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); }