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 AG - Audio Gateway 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 = HCI_CON_HANDLE_INVALID; 71 72 static char hs_cmd_buffer[100]; 73 74 static const char * device_name = "HSP AG Demo 00:00:00:00:00:00"; 75 static const char * device_addr_string = "00:1b:dc:07:32:ef"; 76 static bd_addr_t device_addr; 77 78 /* @section Audio Transfer Setup 79 * 80 * @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz. 81 * To send and receive an audio signal, ENABLE_SCO_OVER_HCI has to be defined. 82 * 83 * Tested working setups: 84 * - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud 85 * - Ubuntu 14 64-bit, CSR USB dongle 86 * - OS X 10.11, CSR USB dongle 87 * 88 * Broken setups: 89 * - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud 90 * - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio 91 * - looks like bug in select->FTDI driver as it works correct on Linux 92 * 93 * SCO not routed over HCI yet: 94 * - CSR UART dongle 95 * - Broadcom USB dongle 96 * - Broadcom UART chipset 97 * - .. 98 * 99 */ 100 101 102 103 #ifdef HAVE_BTSTACK_STDIN 104 static void show_usage(void){ 105 bd_addr_t iut_address; 106 gap_local_bd_addr(iut_address); 107 108 printf("\n--- Bluetooth HSP Audio Gateway Test Console %s ---\n", bd_addr_to_str(iut_address)); 109 110 printf("---\n"); 111 printf("c - Connect to %s\n", device_addr_string); 112 printf("C - Disconnect\n"); 113 printf("a - establish audio connection\n"); 114 printf("A - release audio connection\n"); 115 printf("D - delete all link keys\n"); 116 printf("m - set microphone gain 8\n"); 117 printf("M - set microphone gain 15\n"); 118 printf("o - set speaker gain 0\n"); 119 printf("s - set speaker gain 8\n"); 120 printf("S - set speaker gain 15\n"); 121 printf("r - start ringing\n"); 122 printf("t - stop ringing\n"); 123 printf("\n"); 124 } 125 126 static void stdin_process(char c){ 127 switch (c){ 128 case 'a': 129 printf("Establish audio connection\n"); 130 hsp_ag_establish_audio_connection(); 131 break; 132 case 'A': 133 printf("Release audio connection\n"); 134 hsp_ag_release_audio_connection(); 135 break; 136 case 'c': 137 printf("Connect to %s\n", device_addr_string); 138 hsp_ag_connect(device_addr); 139 break; 140 case 'C': 141 printf("Disconnect.\n"); 142 hsp_ag_disconnect(); 143 break; 144 case 'D': 145 printf("Deleting all link keys\n"); 146 gap_delete_all_link_keys(); 147 break; 148 case 'm': 149 printf("Setting microphone gain 8\n"); 150 hsp_ag_set_microphone_gain(8); 151 break; 152 case 'M': 153 printf("Setting microphone gain 15\n"); 154 hsp_ag_set_microphone_gain(15); 155 break; 156 case 'o': 157 printf("Setting speaker gain 0\n"); 158 hsp_ag_set_speaker_gain(0); 159 break; 160 case 's': 161 printf("Setting speaker gain 8\n"); 162 hsp_ag_set_speaker_gain(8); 163 break; 164 case 'S': 165 printf("Setting speaker gain 15\n"); 166 hsp_ag_set_speaker_gain(15); 167 break; 168 case 'r': 169 printf("Start ringing\n"); 170 hsp_ag_start_ringing(); 171 break; 172 case 't': 173 printf("Stop ringing\n"); 174 hsp_ag_stop_ringing(); 175 break; 176 default: 177 show_usage(); 178 break; 179 } 180 } 181 #endif 182 183 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size){ 184 UNUSED(channel); 185 186 switch (packet_type){ 187 case HCI_SCO_DATA_PACKET: 188 if (READ_SCO_CONNECTION_HANDLE(event) != sco_handle) break; 189 sco_demo_receive(event, event_size); 190 break; 191 192 case HCI_EVENT_PACKET: 193 switch (hci_event_packet_get_type(event)) { 194 #ifndef HAVE_BTSTACK_STDIN 195 case BTSTACK_EVENT_STATE: 196 if (btstack_event_state_get_state(event) != HCI_STATE_WORKING) break; 197 printf("Establish HSP AG service to %s...\n", device_addr_string); 198 hsp_ag_connect(device_addr); 199 break; 200 #endif 201 case HCI_EVENT_SCO_CAN_SEND_NOW: 202 sco_demo_send(sco_handle); 203 break; 204 case HCI_EVENT_HSP_META: 205 switch (event[2]) { 206 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 207 if (hsp_subevent_rfcomm_connection_complete_get_status(event)){ 208 printf("RFCOMM connection establishement failed with status %u\n", hsp_subevent_rfcomm_connection_complete_get_status(event)); 209 break; 210 } 211 printf("RFCOMM connection established.\n"); 212 #ifndef HAVE_BTSTACK_STDIN 213 printf("Establish Audio connection to %s...\n", device_addr_string); 214 hsp_ag_establish_audio_connection(); 215 #endif 216 break; 217 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 218 if (hsp_subevent_rfcomm_disconnection_complete_get_status(event)){ 219 printf("RFCOMM disconnection failed with status %u.\n", hsp_subevent_rfcomm_disconnection_complete_get_status(event)); 220 } else { 221 printf("RFCOMM disconnected.\n"); 222 } 223 break; 224 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 225 if (hsp_subevent_audio_connection_complete_get_status(event)){ 226 printf("Audio connection establishment failed with status %u\n", hsp_subevent_audio_connection_complete_get_status(event)); 227 } else { 228 sco_handle = hsp_subevent_audio_connection_complete_get_handle(event); 229 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 230 hci_request_sco_can_send_now_event(); 231 } 232 break; 233 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 234 printf("Audio connection released.\n\n"); 235 sco_handle = HCI_CON_HANDLE_INVALID; 236 break; 237 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 238 printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); 239 break; 240 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 241 printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); 242 break; 243 case HSP_SUBEVENT_HS_COMMAND:{ 244 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 245 unsigned int cmd_length = hsp_subevent_hs_command_get_value_length(event); 246 unsigned int size = cmd_length <= sizeof(hs_cmd_buffer)? cmd_length : sizeof(hs_cmd_buffer); 247 memcpy(hs_cmd_buffer, hsp_subevent_hs_command_get_value(event), size - 1); 248 printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); 249 break; 250 } 251 default: 252 printf("event not handled %u\n", event[2]); 253 break; 254 } 255 break; 256 default: 257 break; 258 } 259 break; 260 default: 261 break; 262 } 263 } 264 265 /* @section Main Application Setup 266 * 267 * @text Listing MainConfiguration shows main application code. 268 * To run a HSP Audio Gateway service you need to initialize the SDP, and to create and register HSP AG record with it. 269 * In this example, the SCO over HCI is used to receive and send an audio signal. 270 * 271 * Two packet handlers are registered: 272 * - The HCI SCO packet handler receives audio data. 273 * - 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. 274 * 275 * The stdin_process callback allows for sending commands to the AG. 276 * At the end the Bluetooth stack is started. 277 */ 278 279 /* LISTING_START(MainConfiguration): Setup HSP Audio Gateway */ 280 int btstack_main(int argc, const char * argv[]); 281 int btstack_main(int argc, const char * argv[]){ 282 (void)argc; 283 (void)argv; 284 285 sco_demo_init(); 286 sco_demo_set_codec(HFP_CODEC_CVSD); 287 288 l2cap_init(); 289 290 sdp_init(); 291 292 memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 293 hsp_ag_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_ag_service_name); 294 printf("SDP service record size: %u\n", de_get_len(hsp_service_buffer)); 295 sdp_register_service(hsp_service_buffer); 296 297 rfcomm_init(); 298 299 hsp_ag_init(rfcomm_channel_nr); 300 hsp_ag_register_packet_handler(&packet_handler); 301 302 // register for SCO packets 303 hci_register_sco_packet_handler(&packet_handler); 304 305 // parse human readable Bluetooth address 306 sscanf_bd_addr(device_addr_string, device_addr); 307 308 #ifdef HAVE_BTSTACK_STDIN 309 btstack_stdin_setup(stdin_process); 310 #endif 311 312 gap_set_local_name(device_name); 313 gap_discoverable_control(1); 314 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 315 gap_set_class_of_device(0x400204); 316 317 // turn on! 318 hci_power_control(HCI_POWER_ON); 319 return 0; 320 } 321 /* LISTING_END */ 322 /* EXAMPLE_END */ 323