/* * Copyright (C) 2014 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 BLUEKITCHEN * GMBH 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__ "hsp_ag.c" // ***************************************************************************** // // HSP Audio Gateway // // ***************************************************************************** #include "btstack_config.h" #include #include #include #include "bluetooth_sdp.h" #include "btstack_debug.h" #include "btstack_event.h" #include "btstack_memory.h" #include "btstack_run_loop.h" #include "classic/core.h" #include "classic/sdp_server.h" #include "classic/sdp_client_rfcomm.h" #include "classic/sdp_util.h" #include "classic/sdp_client.h" #include "hci.h" #include "hci_cmd.h" #include "hci_dump.h" #include "hsp_ag.h" #include "l2cap.h" #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" #define HSP_HS_AT_CKPD "AT+CKPD\r\n" #define HSP_AG_OK "\r\nOK\r\n" #define HSP_AG_ERROR "\r\nERROR\r\n" #define HSP_AG_RING "\r\nRING\r\n" #define HSP_MICROPHONE_GAIN "+VGM" #define HSP_SPEAKER_GAIN "+VGS" #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" #define HSP_HS_SPEAKER_GAIN "AT+VGS=" static const char hsp_ag_default_service_name[] = "Audio Gateway"; typedef enum { HSP_IDLE, HSP_W2_SEND_SDP_QUERY, HSP_W4_SDP_QUERY_COMPLETE, HSP_W4_RFCOMM_CONNECTED, HSP_RFCOMM_CONNECTION_ESTABLISHED, HSP_W4_RING_ANSWER, HSP_W4_USER_ACTION, HSP_W2_CONNECT_SCO, HSP_W4_SCO_CONNECTED, HSP_AUDIO_CONNECTION_ESTABLISHED, HSP_W2_DISCONNECT_SCO, HSP_W4_SCO_DISCONNECTED, HSP_W2_DISCONNECT_RFCOMM, HSP_W4_RFCOMM_DISCONNECTED, HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN } hsp_state_t; // higher-layer callbacks static btstack_packet_handler_t hsp_ag_callback; static hsp_state_t hsp_ag_state; static int hsp_ag_microphone_gain; static int hsp_ag_speaker_gain; static uint8_t hsp_ag_ring; static uint8_t hsp_ag_send_ok; static uint8_t hsp_ag_send_error; static uint8_t hsp_ag_support_custom_commands; static uint8_t hsp_ag_disconnect_rfcomm; static uint8_t hsp_ag_release_audio_connection_triggered; static uint16_t hsp_ag_sco_packet_types; static bd_addr_t hsp_ag_remote; static uint8_t hsp_ag_channel_nr; static uint16_t hsp_ag_rfcomm_cid; static uint16_t hsp_ag_mtu; static hci_con_handle_t hsp_ag_sco_handle; static hci_con_handle_t hsp_ag_rfcomm_handle; static btstack_timer_source_t hsp_ag_timeout; static btstack_packet_callback_registration_t hci_event_callback_registration; static btstack_context_callback_registration_t hsp_ag_handle_sdp_client_query_request; #ifdef ENABLE_RTK_PCM_WBS static bool hsp_ag_rtk_send_sco_config; #endif static void hsp_run(void); static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ btstack_assert(callback != NULL); hsp_ag_callback = callback; } static void emit_event(uint8_t event_subtype){ if (!hsp_ag_callback) return; uint8_t event[5]; event[0] = HCI_EVENT_HSP_META; event[1] = sizeof(event) - 2; event[2] = event_subtype; little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } static void emit_event_with_value(uint8_t event_subtype, uint8_t value){ if (!hsp_ag_callback) return; uint8_t event[6]; event[0] = HCI_EVENT_HSP_META; event[1] = sizeof(event) - 2; event[2] = event_subtype; little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); event[5] = value; (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } static void emit_event_rfcomm_connected(uint8_t status){ if (!hsp_ag_callback) return; uint8_t event[12]; event[0] = HCI_EVENT_HSP_META; event[1] = sizeof(event) - 2; event[2] = HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE; little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); event[5] = status; reverse_bd_addr(hsp_ag_remote, &event[6]); (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } static void emit_event_audio_connected(uint8_t status, uint16_t sco_handle){ if (!hsp_ag_callback) return; uint8_t event[8]; event[0] = HCI_EVENT_HSP_META; event[1] = sizeof(event) - 2; event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); event[5] = status; little_endian_store_16(event, 6, sco_handle); (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } static void emit_event_audio_disconnected(uint16_t sco_handle){ if (!hsp_ag_callback) return; uint8_t event[7]; event[0] = HCI_EVENT_HSP_META; event[1] = sizeof(event) - 2; event[2] = HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE; little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); little_endian_store_16(event, 5, sco_handle); (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * 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); { // "UUID for PAN Service" de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); } 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_pop_sequence(attribute, l2cpProtocol); uint8_t* rfcomm = de_push_sequence(attribute); { de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel } de_pop_sequence(attribute, rfcomm); } 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 *sppProfile = de_push_sequence(attribute); { de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 } de_pop_sequence(attribute, sppProfile); } de_pop_sequence(service, attribute); // 0x0100 "Service Name" de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); if (name){ de_add_data(service, DE_STRING, (uint16_t) strlen(name), (uint8_t *) name); } else { de_add_data(service, DE_STRING, (uint16_t) strlen(hsp_ag_default_service_name), (uint8_t *) hsp_ag_default_service_name); } } static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, const char * command){ int err = rfcomm_send(cid, (uint8_t*) command, (uint16_t) strlen(command)); if (err){ log_error("rfcomm_send_internal -> error 0X%02x", err); return err; } return err; } void hsp_ag_enable_custom_commands(int enable){ hsp_ag_support_custom_commands = enable; } int hsp_ag_send_result(char * result){ if (!hsp_ag_support_custom_commands) return 1; return hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, result); } static void hsp_ag_reset_state(void){ hsp_ag_state = HSP_IDLE; hsp_ag_rfcomm_cid = 0; hsp_ag_rfcomm_handle = HCI_CON_HANDLE_INVALID; hsp_ag_channel_nr = 0; hsp_ag_sco_handle = HCI_CON_HANDLE_INVALID; hsp_ag_send_ok = 0; hsp_ag_send_error = 0; hsp_ag_ring = 0; hsp_ag_support_custom_commands = 0; hsp_ag_microphone_gain = -1; hsp_ag_speaker_gain = -1; hsp_ag_disconnect_rfcomm = 0; hsp_ag_release_audio_connection_triggered = 0; } void hsp_ag_init(uint8_t rfcomm_channel_nr){ // register for HCI events hci_event_callback_registration.callback = &packet_handler; hci_add_event_handler(&hci_event_callback_registration); rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap hsp_ag_sco_packet_types = SCO_PACKET_TYPES_ALL; hsp_ag_reset_state(); } void hsp_ag_deinit(void){ hsp_ag_reset_state(); hsp_ag_callback = NULL; (void)memset(hsp_ag_remote, 0, 6); (void)memset(&hsp_ag_timeout, 0, sizeof(btstack_timer_source_t)); (void)memset(&hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); (void)memset(&hsp_ag_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); } static void hsp_ag_handle_start_sdp_client_query(void * context){ UNUSED(context); if (hsp_ag_state != HSP_W2_SEND_SDP_QUERY) return; hsp_ag_state = HSP_W4_SDP_QUERY_COMPLETE; log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(hsp_ag_remote), BLUETOOTH_SERVICE_CLASS_HEADSET); sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, hsp_ag_remote, BLUETOOTH_SERVICE_CLASS_HEADSET); } void hsp_ag_connect(bd_addr_t bd_addr){ if (hsp_ag_state != HSP_IDLE) return; (void)memcpy(hsp_ag_remote, bd_addr, 6); hsp_ag_state = HSP_W2_SEND_SDP_QUERY; hsp_ag_handle_sdp_client_query_request.callback = &hsp_ag_handle_start_sdp_client_query; // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback (void) sdp_client_register_query_callback(&hsp_ag_handle_sdp_client_query_request); } void hsp_ag_disconnect(void){ hsp_ag_release_audio_connection(); if (hsp_ag_state < HSP_W4_RFCOMM_CONNECTED){ hsp_ag_state = HSP_IDLE; return; } if (hsp_ag_state == HSP_W4_RFCOMM_CONNECTED){ hsp_ag_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; return; } hsp_ag_disconnect_rfcomm = 1; hsp_run(); } void hsp_ag_establish_audio_connection(void){ switch (hsp_ag_state){ case HSP_RFCOMM_CONNECTION_ESTABLISHED: hsp_ag_state = HSP_W2_CONNECT_SCO; break; case HSP_W4_RFCOMM_CONNECTED: hsp_ag_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; break; default: break; } hsp_run(); } void hsp_ag_release_audio_connection(void){ if (hsp_ag_state >= HSP_W2_DISCONNECT_SCO) return; if (hsp_ag_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; hsp_ag_release_audio_connection_triggered = 1; hsp_run(); } void hsp_ag_set_microphone_gain(uint8_t gain){ if (gain >15) { log_error("Gain must be in interval [0..15], it is given %d", gain); return; } hsp_ag_microphone_gain = gain; hsp_run(); } // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK void hsp_ag_set_speaker_gain(uint8_t gain){ if (gain >15) { log_error("Gain must be in interval [0..15], it is given %d", gain); return; } hsp_ag_speaker_gain = gain; hsp_run(); } static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ hsp_ag_ring = 1; btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout btstack_run_loop_add_timer(timer); hsp_run(); } static void hsp_ringing_timer_start(void){ btstack_run_loop_remove_timer(&hsp_ag_timeout); btstack_run_loop_set_timer_handler(&hsp_ag_timeout, hsp_ringing_timeout_handler); btstack_run_loop_set_timer(&hsp_ag_timeout, 2000); // 2 seconds timeout btstack_run_loop_add_timer(&hsp_ag_timeout); } static void hsp_ringing_timer_stop(void){ btstack_run_loop_remove_timer(&hsp_ag_timeout); } void hsp_ag_start_ringing(void){ hsp_ag_ring = 1; if (hsp_ag_state == HSP_W2_CONNECT_SCO) { hsp_ag_state = HSP_W4_RING_ANSWER; } hsp_ringing_timer_start(); } void hsp_ag_stop_ringing(void){ hsp_ag_ring = 0; if (hsp_ag_state == HSP_W4_RING_ANSWER){ hsp_ag_state = HSP_W2_CONNECT_SCO; } hsp_ringing_timer_stop(); } static void hsp_run(void){ uint16_t packet_types; if (hsp_ag_send_ok){ if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); return; } hsp_ag_send_ok = 0; hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_OK); return; } if (hsp_ag_send_error){ if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); return; } hsp_ag_send_error = 0; hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_ERROR); return; } if (hsp_ag_ring){ if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); return; } hsp_ag_ring = 0; hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_RING); return; } if (hsp_ag_release_audio_connection_triggered){ hsp_ag_release_audio_connection_triggered = 0; gap_disconnect(hsp_ag_sco_handle); return; } if (hsp_ag_disconnect_rfcomm){ hsp_ag_disconnect_rfcomm = 0; rfcomm_disconnect(hsp_ag_rfcomm_cid); return; } #ifdef ENABLE_RTK_PCM_WBS if (hsp_ag_rtk_send_sco_config){ hsp_ag_rtk_send_sco_config = false; log_info("RTK SCO: 16k + CVSD"); hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); return; } #endif switch (hsp_ag_state){ case HSP_W4_RING_ANSWER: if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); return; } hsp_ag_send_ok = 0; hsp_ag_state = HSP_W2_CONNECT_SCO; hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_OK); break; case HSP_W2_CONNECT_SCO: if (!hci_can_send_command_packet_now()) return; hsp_ag_state = HSP_W4_SCO_CONNECTED; // bits 6-9 are 'don't use' packet_types = hsp_ag_sco_packet_types ^ 0x3c0; hci_send_cmd(&hci_setup_synchronous_connection, hsp_ag_rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, packet_types); break; case HSP_W2_DISCONNECT_SCO: hsp_ag_state = HSP_W4_SCO_DISCONNECTED; gap_disconnect(hsp_ag_sco_handle); break; case HSP_W2_DISCONNECT_RFCOMM: rfcomm_disconnect(hsp_ag_rfcomm_cid); break; case HSP_AUDIO_CONNECTION_ESTABLISHED: case HSP_RFCOMM_CONNECTION_ESTABLISHED: if (hsp_ag_microphone_gain >= 0){ if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); return; } int gain = hsp_ag_microphone_gain; hsp_ag_microphone_gain = -1; char buffer[12]; snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); buffer[sizeof(buffer) - 1] = 0; hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, buffer); break; } if (hsp_ag_speaker_gain >= 0){ if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); return; } int gain = hsp_ag_speaker_gain; hsp_ag_speaker_gain = -1; char buffer[12]; snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", HSP_SPEAKER_GAIN, gain); buffer[sizeof(buffer) - 1] = 0; hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, buffer); break; } break; default: break; } } static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel if (packet_type == RFCOMM_DATA_PACKET){ while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ size--; packet++; } if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ log_info("Received button press %s", HSP_HS_BUTTON_PRESS); hsp_ag_send_ok = 1; emit_event(HSP_SUBEVENT_BUTTON_PRESSED); } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); hsp_ag_send_ok = 1; emit_event_with_value(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); hsp_ag_send_ok = 1; emit_event_with_value(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); } else if (strncmp((char *)packet, "AT+", 3) == 0){ hsp_ag_send_error = 1; if (!hsp_ag_callback) return; if ((size + 4) > 255) return; // re-use incoming buffer to avoid reserving buffers/memcpy - ugly but efficient uint8_t * event = packet - 6; event[0] = HCI_EVENT_HSP_META; event[1] = (uint8_t) (size + 4); event[2] = HSP_SUBEVENT_HS_COMMAND; little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); event[5] = (uint8_t) size; (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+6); } hsp_run(); return; } if (packet_type != HCI_EVENT_PACKET) return; uint8_t event = hci_event_packet_get_type(packet); bd_addr_t event_addr; uint16_t handle; uint8_t status; switch (event) { case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ if (hsp_ag_state != HSP_W4_SCO_CONNECTED) break; status = hci_event_synchronous_connection_complete_get_status(packet); if (status != 0){ hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; log_error("(e)SCO Connection failed, status %u", status); emit_event_audio_connected(status, hsp_ag_sco_handle); break; } hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); hsp_ag_sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes switch (link_type){ case 0x00: log_info("SCO Connection established."); if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); break; case 0x02: log_info("eSCO Connection established."); break; default: log_error("(e)SCO reserved link_type 0x%2x", link_type); break; } log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", hsp_ag_sco_handle, bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, hci_event_synchronous_connection_complete_get_air_mode(packet)); if (hsp_ag_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ hsp_ag_state = HSP_W2_DISCONNECT_SCO; break; } hsp_ag_state = HSP_AUDIO_CONNECTION_ESTABLISHED; emit_event_audio_connected(status, hsp_ag_sco_handle); break; } case RFCOMM_EVENT_INCOMING_CONNECTION: if (hsp_ag_state != HSP_IDLE) return; rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); hsp_ag_rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); log_info("RFCOMM channel %u requested for %s with cid 0x%04x", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr), hsp_ag_rfcomm_cid); hsp_ag_state = HSP_W4_RFCOMM_CONNECTED; rfcomm_accept_connection(hsp_ag_rfcomm_cid); break; case RFCOMM_EVENT_CHANNEL_OPENED: log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); status = rfcomm_event_channel_opened_get_status(packet); if (status != ERROR_CODE_SUCCESS){ log_info("RFCOMM channel open failed, status %u", status); hsp_ag_reset_state(); hsp_ag_state = HSP_IDLE; memset(hsp_ag_remote, 0, 6); } else { hsp_ag_rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); hsp_ag_rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); rfcomm_event_channel_opened_get_bd_addr(packet, hsp_ag_remote); hsp_ag_mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", hsp_ag_rfcomm_cid, hsp_ag_mtu, hsp_ag_state); hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; #ifdef ENABLE_RTK_PCM_WBS hsp_ag_rtk_send_sco_config = true; #endif } emit_event_rfcomm_connected(status); break; case RFCOMM_EVENT_CHANNEL_CLOSED: hsp_ag_reset_state(); emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE); break; case RFCOMM_EVENT_CAN_SEND_NOW: hsp_run(); break; case HCI_EVENT_DISCONNECTION_COMPLETE: handle = little_endian_read_16(packet,3); if (handle == hsp_ag_sco_handle){ hci_con_handle_t sco_handle = hsp_ag_sco_handle; hsp_ag_sco_handle = HCI_CON_HANDLE_INVALID; hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; emit_event_audio_disconnected(sco_handle); break; } break; default: break; } hsp_run(); } static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(packet_type); // ok: handling own sdp events UNUSED(channel); // ok: no channel UNUSED(size); // ok: handling own sdp events switch (packet[0]){ case SDP_EVENT_QUERY_RFCOMM_SERVICE: hsp_ag_channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), hsp_ag_channel_nr); break; case SDP_EVENT_QUERY_COMPLETE: if (hsp_ag_channel_nr > 0){ hsp_ag_state = HSP_W4_RFCOMM_CONNECTED; log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); rfcomm_create_channel(packet_handler, hsp_ag_remote, hsp_ag_channel_nr, NULL); break; } hsp_ag_reset_state(); log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); if (sdp_event_query_complete_get_status(packet)){ emit_event_with_value(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); } else { emit_event_with_value(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); } break; default: break; } } void hsp_ag_set_sco_packet_types(uint16_t packet_types){ hsp_ag_sco_packet_types = packet_types; }