1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hsp_ag_demo.c" 39 40 /* 41 * hsp_ag_demo.c 42 */ 43 44 // ***************************************************************************** 45 /* EXAMPLE_START(hsp_ag_demo): HSP Audio Gateway Demo 46 * 47 * @text This example implements a HSP Audio Gateway device that sends and receives 48 * audio signal over HCI SCO. It demonstrates how to receive 49 * an output from a remote headset (HS), and, 50 * if HAVE_BTSTACK_STDIN is defined, how to control the HS. 51 */ 52 // ***************************************************************************** 53 54 55 56 #include <stdint.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 61 #include "btstack.h" 62 #include "sco_demo_util.h" 63 #ifdef HAVE_BTSTACK_STDIN 64 #include "btstack_stdin.h" 65 #endif 66 67 static uint8_t hsp_service_buffer[150]; 68 static const uint8_t rfcomm_channel_nr = 1; 69 static const char hsp_ag_service_name[] = "Audio Gateway Test"; 70 static uint16_t sco_handle = 0; 71 72 static char hs_cmd_buffer[100]; 73 74 static bd_addr_t device_addr = {0x00,0x1b,0xDC,0x07,0x32,0xEF}; 75 76 /* @section Audio Transfer Setup 77 * 78 * @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz. 79 * To send and receive an audio signal, ENABLE_SCO_OVER_HCI has to be defined. 80 * 81 * Tested working setups: 82 * - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud 83 * - Ubuntu 14 64-bit, CSR USB dongle 84 * - OS X 10.11, CSR USB dongle 85 * 86 * Broken setups: 87 * - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud 88 * - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio 89 * - looks like bug in select->FTDI driver as it works correct on Linux 90 * 91 * SCO not routed over HCI yet: 92 * - CSR UART dongle 93 * - Broadcom USB dongle 94 * - Broadcom UART chipset 95 * - .. 96 * 97 */ 98 99 100 static void show_usage(void){ 101 bd_addr_t iut_address; 102 gap_local_bd_addr(iut_address); 103 104 printf("\n--- Bluetooth HSP Audio Gateway Test Console %s ---\n", bd_addr_to_str(iut_address)); 105 106 printf("---\n"); 107 printf("c - Connect to %s\n", bd_addr_to_str(device_addr)); 108 printf("C - Disconnect\n"); 109 printf("a - establish audio connection\n"); 110 printf("A - release audio connection\n"); 111 printf("m - set microphone gain 8\n"); 112 printf("M - set microphone gain 15\n"); 113 printf("o - set speaker gain 0\n"); 114 printf("s - set speaker gain 8\n"); 115 printf("S - set speaker gain 15\n"); 116 printf("r - start ringing\n"); 117 printf("t - stop ringing\n"); 118 printf("\n"); 119 } 120 121 #ifdef HAVE_BTSTACK_STDIN 122 static void stdin_process(char c){ 123 switch (c){ 124 case 'c': 125 printf("Connect to %s\n", bd_addr_to_str(device_addr)); 126 hsp_ag_connect(device_addr); 127 break; 128 case 'C': 129 printf("Disconnect.\n"); 130 hsp_ag_disconnect(); 131 break; 132 case 'a': 133 printf("Establish audio connection\n"); 134 hsp_ag_establish_audio_connection(); 135 break; 136 case 'A': 137 printf("Release audio connection\n"); 138 hsp_ag_release_audio_connection(); 139 break; 140 case 'm': 141 printf("Setting microphone gain 8\n"); 142 hsp_ag_set_microphone_gain(8); 143 break; 144 case 'M': 145 printf("Setting microphone gain 15\n"); 146 hsp_ag_set_microphone_gain(15); 147 break; 148 case 'o': 149 printf("Setting speaker gain 0\n"); 150 hsp_ag_set_speaker_gain(0); 151 break; 152 case 's': 153 printf("Setting speaker gain 8\n"); 154 hsp_ag_set_speaker_gain(8); 155 break; 156 case 'S': 157 printf("Setting speaker gain 15\n"); 158 hsp_ag_set_speaker_gain(15); 159 break; 160 case 'r': 161 printf("Start ringing\n"); 162 hsp_ag_start_ringing(); 163 break; 164 case 't': 165 printf("Stop ringing\n"); 166 hsp_ag_stop_ringing(); 167 break; 168 default: 169 show_usage(); 170 break; 171 } 172 } 173 #endif 174 175 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size){ 176 UNUSED(channel); 177 178 switch (packet_type){ 179 180 case HCI_SCO_DATA_PACKET: 181 sco_demo_receive(event, event_size); 182 break; 183 184 case HCI_EVENT_PACKET: 185 switch (event[0]) { 186 case BTSTACK_EVENT_STATE: 187 if (event[2] != HCI_STATE_WORKING) break; 188 show_usage(); 189 break; 190 case HCI_EVENT_SCO_CAN_SEND_NOW: 191 sco_demo_send(sco_handle); 192 break; 193 case HCI_EVENT_HSP_META: 194 switch (event[2]) { 195 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 196 if (hsp_subevent_rfcomm_connection_complete_get_status(event)){ 197 printf("RFCOMM connection establishement failed with status %u\n", hsp_subevent_rfcomm_connection_complete_get_status(event)); 198 } else { 199 printf("RFCOMM connection established.\n"); 200 } 201 break; 202 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 203 if (hsp_subevent_rfcomm_disconnection_complete_get_status(event)){ 204 printf("RFCOMM disconnection failed with status %u.\n", hsp_subevent_rfcomm_disconnection_complete_get_status(event)); 205 } else { 206 printf("RFCOMM disconnected.\n"); 207 } 208 break; 209 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 210 if (hsp_subevent_audio_connection_complete_get_status(event)){ 211 printf("Audio connection establishment failed with status %u\n", hsp_subevent_audio_connection_complete_get_status(event)); 212 sco_handle = 0; 213 } else { 214 sco_handle = hsp_subevent_audio_connection_complete_get_handle(event); 215 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 216 hci_request_sco_can_send_now_event(); 217 } 218 break; 219 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 220 if (hsp_subevent_audio_disconnection_complete_get_status(event)){ 221 printf("Audio connection releasing failed with status %u\n", hsp_subevent_audio_disconnection_complete_get_status(event)); 222 } else { 223 printf("Audio connection released.\n\n"); 224 sco_handle = 0; 225 } 226 break; 227 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 228 printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); 229 break; 230 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 231 printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); 232 break; 233 case HSP_SUBEVENT_HS_COMMAND:{ 234 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 235 unsigned int cmd_length = hsp_subevent_hs_command_get_value_length(event); 236 unsigned int size = cmd_length <= sizeof(hs_cmd_buffer)? cmd_length : sizeof(hs_cmd_buffer); 237 memcpy(hs_cmd_buffer, hsp_subevent_hs_command_get_value(event), size - 1); 238 printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); 239 break; 240 } 241 default: 242 printf("event not handled %u\n", event[2]); 243 break; 244 } 245 break; 246 default: 247 break; 248 } 249 break; 250 default: 251 break; 252 } 253 } 254 255 /* @section Main Application Setup 256 * 257 * @text Listing MainConfiguration shows main application code. 258 * To run a HSP Audio Gateway service you need to initialize the SDP, and to create and register HSP AG record with it. 259 * In this example, the SCO over HCI is used to receive and send an audio signal. 260 * 261 * Two packet handlers are registered: 262 * - The HCI SCO packet handler receives audio data. 263 * - 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. 264 * 265 * The stdin_process callback allows for sending commands to the AG. 266 * At the end the Bluetooth stack is started. 267 */ 268 269 /* LISTING_START(MainConfiguration): Setup HSP Audio Gateway */ 270 int btstack_main(int argc, const char * argv[]); 271 int btstack_main(int argc, const char * argv[]){ 272 (void)argc; 273 (void)argv; 274 275 sco_demo_init(); 276 277 l2cap_init(); 278 279 sdp_init(); 280 281 memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 282 hsp_ag_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_ag_service_name); 283 printf("SDP service record size: %u\n", de_get_len(hsp_service_buffer)); 284 sdp_register_service(hsp_service_buffer); 285 286 rfcomm_init(); 287 288 hsp_ag_init(rfcomm_channel_nr); 289 hsp_ag_register_packet_handler(&packet_handler); 290 hci_register_sco_packet_handler(&packet_handler); 291 292 #ifdef HAVE_BTSTACK_STDIN 293 btstack_stdin_setup(stdin_process); 294 #endif 295 296 gap_set_local_name("HSP AG Demo 00:00:00:00:00:00"); 297 gap_discoverable_control(1); 298 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 299 gap_set_class_of_device(0x400204); 300 301 // turn on! 302 hci_power_control(HCI_POWER_ON); 303 return 0; 304 } 305 /* LISTING_END */ 306 /* EXAMPLE_END */ 307