/* * 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_demo.c" /* * hsp_ag_demo.c */ // ***************************************************************************** /* EXAMPLE_START(hsp_ag_demo): HSP AG - Audio Gateway * * @text This example implements a HSP Audio Gateway device that sends and receives * audio signal over HCI SCO. It demonstrates how to receive * an output from a remote headset (HS), and, * if HAVE_BTSTACK_STDIN is defined, how to control the HS. */ // ***************************************************************************** #include #include #include #include #include "btstack.h" #include "sco_demo_util.h" #ifdef HAVE_BTSTACK_STDIN #include "btstack_stdin.h" #endif static uint8_t hsp_service_buffer[150]; static const uint8_t rfcomm_channel_nr = 1; static const char hsp_ag_service_name[] = "Audio Gateway Test"; static uint16_t sco_handle = HCI_CON_HANDLE_INVALID; static char hs_cmd_buffer[100]; static const char * device_name = "HSP AG Demo 00:00:00:00:00:00"; static const char * device_addr_string = "00:1b:dc:07:32:ef"; static bd_addr_t device_addr; /* @section Audio Transfer Setup * * @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz. * To send and receive an audio signal, ENABLE_SCO_OVER_HCI has to be defined. * * Tested working setups: * - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud * - Ubuntu 14 64-bit, CSR USB dongle * - OS X 10.11, CSR USB dongle * * Broken setups: * - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud * - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio * - looks like bug in select->FTDI driver as it works correct on Linux * * SCO not routed over HCI yet: * - CSR UART dongle * - Broadcom USB dongle * - Broadcom UART chipset * - .. * */ #ifdef HAVE_BTSTACK_STDIN static void show_usage(void){ bd_addr_t iut_address; gap_local_bd_addr(iut_address); printf("\n--- Bluetooth HSP Audio Gateway Test Console %s ---\n", bd_addr_to_str(iut_address)); printf("---\n"); printf("c - Connect to %s\n", device_addr_string); printf("C - Disconnect\n"); printf("a - establish audio connection\n"); printf("A - release audio connection\n"); printf("D - delete all link keys\n"); printf("m - set microphone gain 8\n"); printf("M - set microphone gain 15\n"); printf("o - set speaker gain 0\n"); printf("s - set speaker gain 8\n"); printf("S - set speaker gain 15\n"); printf("r - start ringing\n"); printf("t - stop ringing\n"); printf("\n"); } static void stdin_process(char c){ switch (c){ case 'a': printf("Establish audio connection\n"); hsp_ag_establish_audio_connection(); break; case 'A': printf("Release audio connection\n"); hsp_ag_release_audio_connection(); break; case 'c': printf("Connect to %s\n", device_addr_string); hsp_ag_connect(device_addr); break; case 'C': printf("Disconnect.\n"); hsp_ag_disconnect(); break; case 'D': printf("Deleting all link keys\n"); gap_delete_all_link_keys(); break; case 'm': printf("Setting microphone gain 8\n"); hsp_ag_set_microphone_gain(8); break; case 'M': printf("Setting microphone gain 15\n"); hsp_ag_set_microphone_gain(15); break; case 'o': printf("Setting speaker gain 0\n"); hsp_ag_set_speaker_gain(0); break; case 's': printf("Setting speaker gain 8\n"); hsp_ag_set_speaker_gain(8); break; case 'S': printf("Setting speaker gain 15\n"); hsp_ag_set_speaker_gain(15); break; case 'r': printf("Start ringing\n"); hsp_ag_start_ringing(); break; case 't': printf("Stop ringing\n"); hsp_ag_stop_ringing(); break; default: show_usage(); break; } } #endif static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size){ UNUSED(channel); uint8_t status; switch (packet_type){ case HCI_SCO_DATA_PACKET: if (READ_SCO_CONNECTION_HANDLE(event) != sco_handle) break; sco_demo_receive(event, event_size); break; case HCI_EVENT_PACKET: switch (hci_event_packet_get_type(event)) { #ifndef HAVE_BTSTACK_STDIN case BTSTACK_EVENT_STATE: if (btstack_event_state_get_state(event) != HCI_STATE_WORKING) break; printf("Establish HSP AG service to %s...\n", device_addr_string); hsp_ag_connect(device_addr); break; #endif case HCI_EVENT_SCO_CAN_SEND_NOW: sco_demo_send(sco_handle); break; case HCI_EVENT_HSP_META: switch (hci_event_hsp_meta_get_subevent_code(event)) { case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: status = hsp_subevent_rfcomm_connection_complete_get_status(event); if (status != ERROR_CODE_SUCCESS){ printf("RFCOMM connection establishement failed, status 0x%02x\n", status); break; } printf("RFCOMM connection established.\n"); #ifndef HAVE_BTSTACK_STDIN printf("Establish Audio connection to %s...\n", device_addr_string); hsp_ag_establish_audio_connection(); #endif break; case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: printf("RFCOMM disconnected.\n"); break; case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: status = hsp_subevent_audio_connection_complete_get_status(event); if (status != ERROR_CODE_SUCCESS){ printf("Audio connection establishment failed, status 0x%02x\n", status); } else { sco_handle = hsp_subevent_audio_connection_complete_get_sco_handle(event); printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); hci_request_sco_can_send_now_event(); } break; case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: printf("Audio connection released.\n\n"); sco_handle = HCI_CON_HANDLE_INVALID; break; case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); break; case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); break; case HSP_SUBEVENT_HS_COMMAND:{ memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); unsigned int cmd_length = hsp_subevent_hs_command_get_value_length(event); unsigned int size = cmd_length <= sizeof(hs_cmd_buffer)? cmd_length : sizeof(hs_cmd_buffer); memcpy(hs_cmd_buffer, hsp_subevent_hs_command_get_value(event), size - 1); printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); break; } case HSP_SUBEVENT_BUTTON_PRESSED: if (sco_handle == HCI_CON_HANDLE_INVALID){ printf("Button event -> establish audio\n"); hsp_ag_establish_audio_connection(); } else { printf("Button event -> release audio\n"); hsp_ag_release_audio_connection(); } break; default: printf("event not handled 0x%02x\n", event[2]); break; } break; default: break; } break; default: break; } } /* @section Main Application Setup * * @text Listing MainConfiguration shows main application code. * To run a HSP Audio Gateway service you need to initialize the SDP, and to create and register HSP AG record with it. * In this example, the SCO over HCI is used to receive and send an audio signal. * * Two packet handlers are registered: * - The HCI SCO packet handler receives audio data. * - The HSP AG packet handler is used to trigger sending of audio data and commands to the HS. It also receives the AG's answers. * * The stdin_process callback allows for sending commands to the AG. * At the end the Bluetooth stack is started. */ /* LISTING_START(MainConfiguration): Setup HSP Audio Gateway */ int btstack_main(int argc, const char * argv[]); int btstack_main(int argc, const char * argv[]){ (void)argc; (void)argv; sco_demo_init(); sco_demo_set_codec(HFP_CODEC_CVSD); l2cap_init(); #ifdef ENABLE_BLE // Initialize LE Security Manager. Needed for cross-transport key derivation sm_init(); #endif sdp_init(); memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); hsp_ag_create_sdp_record(hsp_service_buffer, sdp_create_service_record_handle(), rfcomm_channel_nr, hsp_ag_service_name); btstack_assert(de_get_len( hsp_service_buffer) <= sizeof(hsp_service_buffer)); sdp_register_service(hsp_service_buffer); rfcomm_init(); hsp_ag_init(rfcomm_channel_nr); hsp_ag_register_packet_handler(&packet_handler); // register for SCO packets hci_register_sco_packet_handler(&packet_handler); // parse human readable Bluetooth address sscanf_bd_addr(device_addr_string, device_addr); #ifdef HAVE_BTSTACK_STDIN btstack_stdin_setup(stdin_process); #endif gap_set_local_name(device_name); gap_discoverable_control(1); gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); gap_set_class_of_device(0x400204); // turn on! hci_power_control(HCI_POWER_ON); return 0; } /* LISTING_END */ /* EXAMPLE_END */