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_POSIX_STDIN 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 #ifdef HAVE_POSIX_STDIN 63 #include "stdin_support.h" 64 #endif 65 66 #define SCO_REPORT_PERIOD 255 67 68 static uint8_t hsp_service_buffer[150]; 69 static const uint8_t rfcomm_channel_nr = 1; 70 static const char hsp_ag_service_name[] = "Audio Gateway Test"; 71 static uint16_t sco_handle = 0; 72 73 static char hs_cmd_buffer[100]; 74 75 static bd_addr_t device_addr = {0x00,0x1b,0xDC,0x07,0x32,0xEF}; 76 77 static int phase = 0; 78 79 // input signal: pre-computed sine wave, 160 Hz 80 static const uint8_t sine[] = { 81 0, 15, 31, 46, 61, 74, 86, 97, 107, 114, 82 120, 124, 126, 126, 124, 120, 114, 107, 97, 86, 83 74, 61, 46, 31, 15, 0, 241, 225, 210, 195, 84 182, 170, 159, 149, 142, 136, 132, 130, 130, 132, 85 136, 142, 149, 159, 170, 182, 195, 210, 225, 241, 86 }; 87 88 /* @section Audio Transfer Setup 89 * 90 * @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz. 91 * To send and receive an audio signal, ENABLE_SCO_OVER_HCI has to be defined. 92 * 93 * Tested working setups: 94 * - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud 95 * - Ubuntu 14 64-bit, CSR USB dongle 96 * - OS X 10.11, CSR USB dongle 97 * 98 * Broken setups: 99 * - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud 100 * - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio 101 * - looks like bug in select->FTDI driver as it works correct on Linux 102 * 103 * SCO not routed over HCI yet: 104 * - CSR UART dongle 105 * - Broadcom USB dongle 106 * - Broadcom UART chipset 107 * - .. 108 * 109 */ 110 111 112 static void show_usage(void){ 113 bd_addr_t iut_address; 114 gap_local_bd_addr(iut_address); 115 116 printf("\n--- Bluetooth HSP Audio Gateway Test Console %s ---\n", bd_addr_to_str(iut_address)); 117 118 printf("---\n"); 119 printf("c - Connect to %s\n", bd_addr_to_str(device_addr)); 120 printf("C - Disconnect\n"); 121 printf("a - establish audio connection\n"); 122 printf("A - release audio connection\n"); 123 printf("m - set microphone gain 8\n"); 124 printf("M - set microphone gain 15\n"); 125 printf("o - set speaker gain 0\n"); 126 printf("s - set speaker gain 8\n"); 127 printf("S - set speaker gain 15\n"); 128 printf("r - start ringing\n"); 129 printf("t - stop ringing\n"); 130 printf("---\n"); 131 printf("Ctrl-c - exit\n"); 132 printf("---\n"); 133 } 134 135 #ifdef HAVE_POSIX_STDIN 136 static void stdin_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type){ 137 char buffer; 138 read(ds->fd, &buffer, 1); 139 140 switch (buffer){ 141 case 'c': 142 printf("Connect to %s\n", bd_addr_to_str(device_addr)); 143 hsp_ag_connect(device_addr); 144 break; 145 case 'C': 146 printf("Disconnect.\n"); 147 hsp_ag_disconnect(); 148 break; 149 case 'a': 150 printf("Establish audio connection\n"); 151 hsp_ag_establish_audio_connection(); 152 break; 153 case 'A': 154 printf("Release audio connection\n"); 155 hsp_ag_release_audio_connection(); 156 break; 157 case 'm': 158 printf("Setting microphone gain 8\n"); 159 hsp_ag_set_microphone_gain(8); 160 break; 161 case 'M': 162 printf("Setting microphone gain 15\n"); 163 hsp_ag_set_microphone_gain(15); 164 break; 165 case 'o': 166 printf("Setting speaker gain 0\n"); 167 hsp_ag_set_speaker_gain(0); 168 break; 169 case 's': 170 printf("Setting speaker gain 8\n"); 171 hsp_ag_set_speaker_gain(8); 172 break; 173 case 'S': 174 printf("Setting speaker gain 15\n"); 175 hsp_ag_set_speaker_gain(15); 176 break; 177 case 'r': 178 printf("Start ringing\n"); 179 hsp_ag_start_ringing(); 180 break; 181 case 't': 182 printf("Stop ringing\n"); 183 hsp_ag_stop_ringing(); 184 break; 185 default: 186 show_usage(); 187 break; 188 189 } 190 } 191 #endif 192 193 static void send_sco_data(void){ 194 if (!sco_handle) return; 195 196 const int sco_packet_length = hci_get_sco_packet_length(); 197 const int sco_payload_length = sco_packet_length - 3; 198 const int frames_per_packet = sco_payload_length; // for 8-bit data. for 16-bit data it's /2 199 200 hci_reserve_packet_buffer(); 201 uint8_t * sco_packet = hci_get_outgoing_packet_buffer(); 202 // set handle + flags 203 little_endian_store_16(sco_packet, 0, sco_handle); 204 // set len 205 sco_packet[2] = sco_payload_length; 206 int i; 207 for (i=0;i<frames_per_packet;i++){ 208 sco_packet[3+i] = sine[phase]; 209 phase++; 210 if (phase >= sizeof(sine)) phase = 0; 211 } 212 hci_send_sco_packet_buffer(sco_packet_length); 213 214 // request another send event 215 hci_request_sco_can_send_now_event(); 216 217 static int count = 0; 218 count++; 219 if ((count & SCO_REPORT_PERIOD) == 0) printf("Sent %u\n", count); 220 } 221 222 static void sco_packet_handler(uint8_t packet_type, uint8_t * packet, uint16_t size){ 223 return; 224 static int count = 0; 225 count++; 226 if ((count & SCO_REPORT_PERIOD)) return; 227 printf("SCO packets %u\n", count); 228 } 229 230 static void packet_handler(uint8_t * event, uint16_t event_size){ 231 switch (event[0]) { 232 case BTSTACK_EVENT_STATE: 233 if (event[2] != HCI_STATE_WORKING) break; 234 show_usage(); 235 break; 236 case HCI_EVENT_SCO_CAN_SEND_NOW: 237 send_sco_data(); 238 break; 239 case HCI_EVENT_HSP_META: 240 switch (event[2]) { 241 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 242 if (hsp_subevent_rfcomm_connection_complete_get_status(event)){ 243 printf("RFCOMM connection establishement failed with status %u\n", hsp_subevent_audio_connection_complete_get_handle(event)); 244 } else { 245 printf("RFCOMM connection established.\n"); 246 } 247 break; 248 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 249 if (hsp_subevent_rfcomm_disconnection_complete_get_status(event)){ 250 printf("RFCOMM disconnection failed with status %u.\n", hsp_subevent_rfcomm_disconnection_complete_get_status(event)); 251 } else { 252 printf("RFCOMM disconnected.\n"); 253 } 254 break; 255 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 256 if (hsp_subevent_audio_connection_complete_get_status(event)){ 257 printf("Audio connection establishment failed with status %u\n", hsp_subevent_audio_connection_complete_get_status(event)); 258 sco_handle = 0; 259 } else { 260 sco_handle = hsp_subevent_audio_connection_complete_get_handle(event); 261 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 262 hci_request_sco_can_send_now_event(); 263 } 264 break; 265 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 266 if (hsp_subevent_audio_disconnection_complete_get_status(event)){ 267 printf("Audio connection releasing failed with status %u\n", hsp_subevent_audio_disconnection_complete_get_status(event)); 268 } else { 269 printf("Audio connection released.\n\n"); 270 sco_handle = 0; 271 } 272 break; 273 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 274 printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); 275 break; 276 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 277 printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); 278 break; 279 case HSP_SUBEVENT_HS_COMMAND:{ 280 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 281 int cmd_length = hsp_subevent_hs_command_get_value_length(event); 282 int size = cmd_length <= sizeof(hs_cmd_buffer)? cmd_length : sizeof(hs_cmd_buffer); 283 memcpy(hs_cmd_buffer, hsp_subevent_hs_command_get_value(event), size - 1); 284 printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); 285 break; 286 } 287 default: 288 printf("event not handled %u\n", event[2]); 289 break; 290 } 291 break; 292 default: 293 break; 294 } 295 } 296 297 /* @section Main Application Setup 298 * 299 * @text Listing MainConfiguration shows main application code. 300 * To run a HSP Audio Gateway service you need to initialize the SDP, and to create and register HSP AG record with it. 301 * In this example, the SCO over HCI is used to receive and send an audio signal. 302 * 303 * Two packet handlers are registered: 304 * - The HCI SCO packet handler receives audio data. 305 * - 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. 306 * 307 * The stdin_process callback allows for sending commands to the AG. 308 * At the end the Bluetooth stack is started. 309 */ 310 311 /* LISTING_START(MainConfiguration): Setup HSP Audio Gateway */ 312 int btstack_main(int argc, const char * argv[]); 313 int btstack_main(int argc, const char * argv[]){ 314 315 hci_register_sco_packet_handler(&sco_packet_handler); 316 317 l2cap_init(); 318 319 sdp_init(); 320 321 memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 322 hsp_ag_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_ag_service_name); 323 printf("SDP service record size: %u\n", de_get_len(hsp_service_buffer)); 324 sdp_register_service(hsp_service_buffer); 325 326 rfcomm_init(); 327 328 hsp_ag_init(rfcomm_channel_nr); 329 hsp_ag_register_packet_handler(packet_handler); 330 331 #ifdef HAVE_POSIX_STDIN 332 btstack_stdin_setup(stdin_process); 333 #endif 334 335 gap_set_local_name("BTstack HSP AG"); 336 gap_discoverable_control(1); 337 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 338 gap_set_class_of_device(0x400204); 339 340 // turn on! 341 hci_power_control(HCI_POWER_ON); 342 return 0; 343 } 344 /* LISTING_END */ 345 /* EXAMPLE_END */ 346