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 /* 39 * hsp_ag_demo.c 40 */ 41 42 // ***************************************************************************** 43 /* EXAMPLE_START(hsp_ag_demo): HSP Audio Gateway Demo 44 * 45 * @text This example implements a HSP Audio Gateway device that sends and receives 46 * audio signal over HCI SCO. It demonstrates how to receive 47 * an output from a remote headset (HS), and, 48 * if HAVE_STDIO is defined, how to control the HS. 49 */ 50 // ***************************************************************************** 51 52 53 54 #include <stdint.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <math.h> 59 #include <unistd.h> 60 61 #include "btstack.h" 62 63 #define SCO_REPORT_PERIOD 255 64 65 static uint8_t hsp_service_buffer[150]; 66 static const uint8_t rfcomm_channel_nr = 1; 67 static const char hsp_ag_service_name[] = "Audio Gateway Test"; 68 static uint16_t sco_handle = 0; 69 70 static char hs_cmd_buffer[100]; 71 72 static bd_addr_t device_addr = {0x00,0x1b,0xDC,0x07,0x32,0xEF}; 73 74 static int phase = 0; 75 76 // input signal: pre-computed sine wave, 160 Hz 77 static const uint8_t sine[] = { 78 0, 15, 31, 46, 61, 74, 86, 97, 107, 114, 79 120, 124, 126, 126, 124, 120, 114, 107, 97, 86, 80 74, 61, 46, 31, 15, 0, 241, 225, 210, 195, 81 182, 170, 159, 149, 142, 136, 132, 130, 130, 132, 82 136, 142, 149, 159, 170, 182, 195, 210, 225, 241, 83 }; 84 85 /* @section Audio Transfer Setup 86 * 87 * @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz. 88 * To send and receive an audio signal, HAVE_SCO_OVER_HCI has to be defined. 89 * 90 * Tested working setups: 91 * - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud 92 * - Ubuntu 14 64-bit, CSR USB dongle 93 * - OS X 10.11, CSR USB dongle 94 * 95 * Broken setups: 96 * - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud 97 * - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio 98 * - looks like bug in select->FTDI driver as it works correct on Linux 99 * 100 * SCO not routed over HCI yet: 101 * - CSR UART dongle 102 * - Broadcom USB dongle 103 * - Broadcom UART chipset 104 * - .. 105 * 106 */ 107 108 109 static void show_usage(void){ 110 bd_addr_t iut_address; 111 gap_local_bd_addr(iut_address); 112 113 printf("\n--- Bluetooth HSP Audio Gateway Test Console %s ---\n", bd_addr_to_str(iut_address)); 114 115 printf("---\n"); 116 printf("c - Connect to %s\n", bd_addr_to_str(device_addr)); 117 printf("C - Disconnect\n"); 118 printf("a - establish audio connection\n"); 119 printf("A - release audio connection\n"); 120 printf("m - set microphone gain 8\n"); 121 printf("M - set microphone gain 15\n"); 122 printf("o - set speaker gain 0\n"); 123 printf("s - set speaker gain 8\n"); 124 printf("S - set speaker gain 15\n"); 125 printf("r - start ringing\n"); 126 printf("t - stop ringing\n"); 127 printf("---\n"); 128 printf("Ctrl-c - exit\n"); 129 printf("---\n"); 130 } 131 132 #ifdef HAVE_STDIO 133 static int stdin_process(struct data_source *ds){ 134 char buffer; 135 read(ds->fd, &buffer, 1); 136 137 switch (buffer){ 138 case 'c': 139 printf("Connect to %s\n", bd_addr_to_str(device_addr)); 140 hsp_ag_connect(device_addr); 141 break; 142 case 'C': 143 printf("Disconnect.\n"); 144 hsp_ag_disconnect(); 145 break; 146 case 'a': 147 printf("Establish audio connection\n"); 148 hsp_ag_establish_audio_connection(); 149 break; 150 case 'A': 151 printf("Release audio connection\n"); 152 hsp_ag_release_audio_connection(); 153 break; 154 case 'm': 155 printf("Setting microphone gain 8\n"); 156 hsp_ag_set_microphone_gain(8); 157 break; 158 case 'M': 159 printf("Setting microphone gain 15\n"); 160 hsp_ag_set_microphone_gain(15); 161 break; 162 case 'o': 163 printf("Setting speaker gain 0\n"); 164 hsp_ag_set_speaker_gain(0); 165 break; 166 case 's': 167 printf("Setting speaker gain 8\n"); 168 hsp_ag_set_speaker_gain(8); 169 break; 170 case 'S': 171 printf("Setting speaker gain 15\n"); 172 hsp_ag_set_speaker_gain(15); 173 break; 174 case 'r': 175 printf("Start ringing\n"); 176 hsp_ag_start_ringing(); 177 break; 178 case 't': 179 printf("Stop ringing\n"); 180 hsp_ag_stop_ringing(); 181 break; 182 default: 183 show_usage(); 184 break; 185 186 } 187 return 0; 188 } 189 #endif 190 191 static void try_send_sco(void){ 192 return; 193 if (!sco_handle) return; 194 if (!hci_can_send_sco_packet_now()) { 195 // printf("try_send_sco, cannot send now\n"); 196 return; 197 } 198 199 const int sco_packet_length = hci_get_sco_packet_length(); 200 const int sco_payload_length = sco_packet_length - 3; 201 const int frames_per_packet = sco_payload_length; // for 8-bit data. for 16-bit data it's /2 202 203 hci_reserve_packet_buffer(); 204 uint8_t * sco_packet = hci_get_outgoing_packet_buffer(); 205 // set handle + flags 206 little_endian_store_16(sco_packet, 0, sco_handle); 207 // set len 208 sco_packet[2] = sco_payload_length; 209 int i; 210 for (i=0;i<frames_per_packet;i++){ 211 sco_packet[3+i] = sine[phase]; 212 phase++; 213 if (phase >= sizeof(sine)) phase = 0; 214 } 215 hci_send_sco_packet_buffer(sco_packet_length); 216 static int count = 0; 217 count++; 218 if ((count & SCO_REPORT_PERIOD) == 0) printf("Sent %u\n", count); 219 } 220 221 static void sco_packet_handler(uint8_t packet_type, uint8_t * packet, uint16_t size){ 222 return; 223 static int count = 0; 224 count++; 225 if ((count & SCO_REPORT_PERIOD)) return; 226 printf("SCO packets %u\n", count); 227 } 228 229 static void packet_handler(uint8_t * event, uint16_t event_size){ 230 switch (event[0]) { 231 case BTSTACK_EVENT_STATE: 232 if (event[2] != HCI_STATE_WORKING) break; 233 printf("HCI_STATE_WORKING\n"); 234 show_usage(); 235 break; 236 case HCI_EVENT_SCO_CAN_SEND_NOW: 237 try_send_sco(); 238 break; 239 case HCI_EVENT_HSP_META: 240 switch (event[2]) { 241 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 242 if (event[3] == 0){ 243 printf("RFCOMM connection established.\n"); 244 } else { 245 printf("RFCOMM connection establishement failed.\n"); 246 } 247 break; 248 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 249 if (event[3] == 0){ 250 printf("RFCOMM disconnected.\n"); 251 } else { 252 printf("RFCOMM disconnection failed.\n"); 253 } 254 break; 255 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 256 if (event[3] == 0){ 257 sco_handle = little_endian_read_16(event, 4); 258 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 259 try_send_sco(); 260 } else { 261 printf("Audio connection establishment failed with status %u\n", event[3]); 262 sco_handle = 0; 263 } 264 break; 265 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 266 if (event[3] == 0){ 267 printf("Audio connection released.\n\n"); 268 sco_handle = 0; 269 } else { 270 printf("Audio connection releasing failed with status %u\n", event[3]); 271 } 272 break; 273 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 274 printf("Received microphone gain change %d\n", event[3]); 275 break; 276 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 277 printf("Received speaker gain change %d\n", event[3]); 278 break; 279 case HSP_SUBEVENT_HS_COMMAND:{ 280 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 281 int size = event[3] <= sizeof(hs_cmd_buffer)? event[3] : sizeof(hs_cmd_buffer); 282 memcpy(hs_cmd_buffer, &event[4], size - 1); 283 printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); 284 break; 285 } 286 default: 287 printf("event not handled %u\n", event[2]); 288 break; 289 } 290 break; 291 default: 292 break; 293 } 294 } 295 296 /* @section Main Application Setup 297 * 298 * @text Listing MainConfiguration shows main application code. 299 * To run a HSP Audio Gateway service you need to initialize the SDP, and to create and register HSP AG record with it. 300 * In this example, the SCO over HCI is used to receive and send an audio signal. 301 * 302 * Two packet handlers are registered: 303 * - The HCI SCO packet handler receives audio data. 304 * - 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. 305 * 306 * The stdin_process callback allows for sending commands to the AG. 307 * At the end the Bluetooth stack is started. 308 */ 309 310 /* LISTING_START(MainConfiguration): Setup HSP Audio Gateway */ 311 int btstack_main(int argc, const char * argv[]); 312 int btstack_main(int argc, const char * argv[]){ 313 314 hci_register_sco_packet_handler(&sco_packet_handler); 315 316 l2cap_init(); 317 318 sdp_init(); 319 320 memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 321 hsp_ag_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_ag_service_name); 322 printf("SDP service record size: %u\n", de_get_len(hsp_service_buffer)); 323 sdp_register_service(hsp_service_buffer); 324 325 rfcomm_init(); 326 327 hsp_ag_init(rfcomm_channel_nr); 328 hsp_ag_register_packet_handler(packet_handler); 329 330 #ifdef HAVE_STDIO 331 btstack_stdin_setup(stdin_process); 332 #endif 333 334 gap_set_local_name("BTstack HSP AG"); 335 gap_discoverable_control(1); 336 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 337 gap_set_class_of_device(0x400204); 338 339 // turn on! 340 hci_power_control(HCI_POWER_ON); 341 return 0; 342 } 343 /* LISTING_END */ 344