/* * 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 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 * */ /* * hsp_ag_demo.c */ // ***************************************************************************** /* EXAMPLE_START(hsp_ag_demo): HSP Audio Gateway Demo * * @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_STDIO is defined, how to control the HS. */ // ***************************************************************************** #include #include #include #include #include #include #include "btstack.h" #define SCO_REPORT_PERIOD 255 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 = 0; static char hs_cmd_buffer[100]; static bd_addr_t device_addr = {0x00,0x1b,0xDC,0x07,0x32,0xEF}; static int phase = 0; // input signal: pre-computed sine wave, 160 Hz static const uint8_t sine[] = { 0, 15, 31, 46, 61, 74, 86, 97, 107, 114, 120, 124, 126, 126, 124, 120, 114, 107, 97, 86, 74, 61, 46, 31, 15, 0, 241, 225, 210, 195, 182, 170, 159, 149, 142, 136, 132, 130, 130, 132, 136, 142, 149, 159, 170, 182, 195, 210, 225, 241, }; /* @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, HAVE_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 * - .. * */ 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", bd_addr_to_str(device_addr)); printf("C - Disconnect\n"); printf("a - establish audio connection\n"); printf("A - release audio connection\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"); printf("Ctrl-c - exit\n"); printf("---\n"); } #ifdef HAVE_STDIO static int stdin_process(struct data_source *ds){ char buffer; read(ds->fd, &buffer, 1); switch (buffer){ case 'c': printf("Connect to %s\n", bd_addr_to_str(device_addr)); hsp_ag_connect(device_addr); break; case 'C': printf("Disconnect.\n"); hsp_ag_disconnect(); break; 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 '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; } return 0; } #endif static void try_send_sco(void){ return; if (!sco_handle) return; if (!hci_can_send_sco_packet_now()) { // printf("try_send_sco, cannot send now\n"); return; } const int sco_packet_length = hci_get_sco_packet_length(); const int sco_payload_length = sco_packet_length - 3; const int frames_per_packet = sco_payload_length; // for 8-bit data. for 16-bit data it's /2 hci_reserve_packet_buffer(); uint8_t * sco_packet = hci_get_outgoing_packet_buffer(); // set handle + flags little_endian_store_16(sco_packet, 0, sco_handle); // set len sco_packet[2] = sco_payload_length; int i; for (i=0;i= sizeof(sine)) phase = 0; } hci_send_sco_packet_buffer(sco_packet_length); static int count = 0; count++; if ((count & SCO_REPORT_PERIOD) == 0) printf("Sent %u\n", count); } static void sco_packet_handler(uint8_t packet_type, uint8_t * packet, uint16_t size){ return; static int count = 0; count++; if ((count & SCO_REPORT_PERIOD)) return; printf("SCO packets %u\n", count); } static void packet_handler(uint8_t * event, uint16_t event_size){ switch (event[0]) { case BTSTACK_EVENT_STATE: if (event[2] != HCI_STATE_WORKING) break; printf("HCI_STATE_WORKING\n"); show_usage(); break; case HCI_EVENT_SCO_CAN_SEND_NOW: try_send_sco(); break; case HCI_EVENT_HSP_META: switch (event[2]) { case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: if (event[3] == 0){ printf("RFCOMM connection established.\n"); } else { printf("RFCOMM connection establishement failed.\n"); } break; case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: if (event[3] == 0){ printf("RFCOMM disconnected.\n"); } else { printf("RFCOMM disconnection failed.\n"); } break; case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: if (event[3] == 0){ sco_handle = little_endian_read_16(event, 4); printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); try_send_sco(); } else { printf("Audio connection establishment failed with status %u\n", event[3]); sco_handle = 0; } break; case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: if (event[3] == 0){ printf("Audio connection released.\n\n"); sco_handle = 0; } else { printf("Audio connection releasing failed with status %u\n", event[3]); } break; case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: printf("Received microphone gain change %d\n", event[3]); break; case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: printf("Received speaker gain change %d\n", event[3]); break; case HSP_SUBEVENT_HS_COMMAND:{ memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); int size = event[3] <= sizeof(hs_cmd_buffer)? event[3] : sizeof(hs_cmd_buffer); memcpy(hs_cmd_buffer, &event[4], size - 1); printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); break; } default: printf("event not handled %u\n", event[2]); 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[]){ hci_register_sco_packet_handler(&sco_packet_handler); l2cap_init(); sdp_init(); memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); hsp_ag_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_ag_service_name); printf("SDP service record size: %u\n", de_get_len(hsp_service_buffer)); sdp_register_service(hsp_service_buffer); rfcomm_init(); hsp_ag_init(rfcomm_channel_nr); hsp_ag_register_packet_handler(packet_handler); #ifdef HAVE_STDIO btstack_stdin_setup(stdin_process); #endif gap_set_local_name("BTstack HSP AG"); 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 */