/* * 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__ "a2dp_sink.c" #include #include #include #include #include "btstack.h" #include "avdtp.h" #include "avdtp_util.h" #include "avdtp_sink.h" #include "a2dp_sink.h" static const char * default_a2dp_sink_service_name = "BTstack A2DP Sink Service"; static const char * default_a2dp_sink_service_provider_name = "BTstack A2DP Sink Service Provider"; static avdtp_context_t a2dp_sink_context; static a2dp_state_t app_state = A2DP_IDLE; static avdtp_stream_endpoint_context_t sc; static uint16_t avdtp_cid = 0; // static int next_remote_sep_index_to_query = 0; static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); void a2dp_sink_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_SINK); } 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_PROTOCOL_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_sink_service_name), (uint8_t *) default_a2dp_sink_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_sink_service_provider_name), (uint8_t *) default_a2dp_sink_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); } void a2dp_sink_register_packet_handler(btstack_packet_handler_t callback){ // avdtp_sink_register_packet_handler(callback); // return; if (callback == NULL){ log_error("a2dp_sink_register_packet_handler called with NULL callback"); return; } avdtp_sink_register_packet_handler(&packet_handler); a2dp_sink_context.a2dp_callback = callback; } void a2dp_sink_register_media_handler(void (*callback)(avdtp_stream_endpoint_t * stream_endpoint, uint8_t *packet, uint16_t size)){ if (callback == NULL){ log_error("a2dp_sink_register_media_handler called with NULL callback"); return; } avdtp_sink_register_media_handler(callback); } void a2dp_sink_init(void){ avdtp_sink_init(&a2dp_sink_context); l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); } uint8_t a2dp_sink_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 * media_codec_info, uint16_t media_codec_info_len){ avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_sink_create_stream_endpoint(AVDTP_SINK, media_type); avdtp_sink_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); avdtp_sink_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, codec_capabilities, codec_capabilities_len); local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; return local_stream_endpoint->sep.seid; } void a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid){ sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_sink_context); if (!sc.local_stream_endpoint){ log_error(" no local_stream_endpoint for seid %d", local_seid); return; } avdtp_sink_connect(bd_addr); } void a2dp_sink_disconnect(uint16_t a2dp_cid){ avdtp_disconnect(a2dp_cid, &a2dp_sink_context); } static void a2dp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ if (!callback) return; if (event_size < 8) return; event[0] = HCI_EVENT_A2DP_META; event[2] = A2DP_SUBEVENT_STREAM_ESTABLISHED; (*callback)(HCI_EVENT_PACKET, 0, event, event_size); } static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ if (!callback) return; if (event_size < 18) return; event[0] = HCI_EVENT_A2DP_META; event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; (*callback)(HCI_EVENT_PACKET, 0, event, event_size); } static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ if (!callback) return; if (event_size < 112) return; event[0] = HCI_EVENT_A2DP_META; event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; } static inline void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t a2dp_cid, uint8_t eventID, 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++] = eventID; little_endian_store_16(event, pos, a2dp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = status; (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); bd_addr_t event_addr; uint8_t status; uint8_t signal_identifier; uint16_t cid; uint8_t local_seid; switch (packet_type) { case HCI_EVENT_PACKET: switch (hci_event_packet_get_type(packet)) { case HCI_EVENT_PIN_CODE_REQUEST: // inform about pin code request printf("Pin code request - using '0000'\n"); hci_event_pin_code_request_get_bd_addr(packet, event_addr); hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000"); break; case HCI_EVENT_DISCONNECTION_COMPLETE: // connection closed -> quit test app app_state = A2DP_IDLE; printf("\n --- a2dp sink: HCI_EVENT_DISCONNECTION_COMPLETE ---\n"); break; case HCI_EVENT_AVDTP_META: switch (packet[2]){ case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: status = avdtp_subevent_signaling_connection_established_get_status(packet); if (status != 0){ log_info(" --- a2dp sink --- AVDTP_SUBEVENT_SIGNALING_CONNECTION could not be established, status %d ---", status); break; } app_state = A2DP_CONNECTED; avdtp_cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); log_info(" --- a2dp sink --- AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---", avdtp_cid); break; case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: log_info(" --- a2dp sink --- received non SBC codec. not implemented"); avdtp_signaling_emit_media_codec_other(a2dp_sink_context.a2dp_callback, packet, size); break; case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: if (app_state < A2DP_CONNECTED) return; a2dp_signaling_emit_media_codec_sbc(a2dp_sink_context.a2dp_callback, packet, size); break; case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: status = avdtp_subevent_streaming_connection_established_get_status(packet); if (status != 0){ app_state = A2DP_CONNECTED; } else { app_state = A2DP_STREAMING_OPENED; } a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, packet, size); break; case AVDTP_SUBEVENT_SIGNALING_ACCEPT: if (!a2dp_sink_context.a2dp_callback) return; status = 0; signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); local_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); printf(" --- a2dp sink --- Accepted %d, a2dp sink cid 0x%2x, local seid %d\n", signal_identifier, cid, local_seid); switch (signal_identifier){ case AVDTP_SI_START: a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STARTED, local_seid, status); break; case AVDTP_SI_SUSPEND: a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_SUSPENDED, local_seid, status); break; case AVDTP_SI_ABORT: case AVDTP_SI_CLOSE: a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_RELEASED, local_seid, status); break; default: break; } break; case AVDTP_SUBEVENT_SIGNALING_REJECT: case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: if (!a2dp_sink_context.a2dp_callback) return; status = 1; signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); local_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); printf(" --- a2dp sink --- Rejected %d, a2dp sink cid 0x%2x, local seid %d\n", signal_identifier, cid, local_seid); switch (signal_identifier){ case AVDTP_SI_START: a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STARTED, local_seid, status); break; case AVDTP_SI_SUSPEND: a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_SUSPENDED, local_seid, status); break; case AVDTP_SI_ABORT: case AVDTP_SI_CLOSE: a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_RELEASED, local_seid, status); break; default: break; } break; default: app_state = A2DP_IDLE; log_info(" --- a2dp sink --- not implemented"); break; } break; default: break; } break; default: // other packet type break; } }