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 printf("Ctrl-c - exit\n"); 120 printf("---\n"); 121 } 122 123 #ifdef HAVE_BTSTACK_STDIN 124 static void stdin_process(char c){ 125 switch (c){ 126 case 'c': 127 printf("Connect to %s\n", bd_addr_to_str(device_addr)); 128 hsp_ag_connect(device_addr); 129 break; 130 case 'C': 131 printf("Disconnect.\n"); 132 hsp_ag_disconnect(); 133 break; 134 case 'a': 135 printf("Establish audio connection\n"); 136 hsp_ag_establish_audio_connection(); 137 break; 138 case 'A': 139 printf("Release audio connection\n"); 140 hsp_ag_release_audio_connection(); 141 break; 142 case 'm': 143 printf("Setting microphone gain 8\n"); 144 hsp_ag_set_microphone_gain(8); 145 break; 146 case 'M': 147 printf("Setting microphone gain 15\n"); 148 hsp_ag_set_microphone_gain(15); 149 break; 150 case 'o': 151 printf("Setting speaker gain 0\n"); 152 hsp_ag_set_speaker_gain(0); 153 break; 154 case 's': 155 printf("Setting speaker gain 8\n"); 156 hsp_ag_set_speaker_gain(8); 157 break; 158 case 'S': 159 printf("Setting speaker gain 15\n"); 160 hsp_ag_set_speaker_gain(15); 161 break; 162 case 'r': 163 printf("Start ringing\n"); 164 hsp_ag_start_ringing(); 165 break; 166 case 't': 167 printf("Stop ringing\n"); 168 hsp_ag_stop_ringing(); 169 break; 170 default: 171 show_usage(); 172 break; 173 174 } 175 } 176 #endif 177 178 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size){ 179 UNUSED(channel); 180 181 switch (packet_type){ 182 183 case HCI_SCO_DATA_PACKET: 184 sco_demo_receive(event, event_size); 185 break; 186 187 case HCI_EVENT_PACKET: 188 switch (event[0]) { 189 case BTSTACK_EVENT_STATE: 190 if (event[2] != HCI_STATE_WORKING) break; 191 show_usage(); 192 break; 193 case HCI_EVENT_SCO_CAN_SEND_NOW: 194 sco_demo_send(sco_handle); 195 break; 196 case HCI_EVENT_HSP_META: 197 switch (event[2]) { 198 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 199 if (hsp_subevent_rfcomm_connection_complete_get_status(event)){ 200 printf("RFCOMM connection establishement failed with status %u\n", hsp_subevent_rfcomm_connection_complete_get_status(event)); 201 } else { 202 printf("RFCOMM connection established.\n"); 203 } 204 break; 205 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 206 if (hsp_subevent_rfcomm_disconnection_complete_get_status(event)){ 207 printf("RFCOMM disconnection failed with status %u.\n", hsp_subevent_rfcomm_disconnection_complete_get_status(event)); 208 } else { 209 printf("RFCOMM disconnected.\n"); 210 } 211 break; 212 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 213 if (hsp_subevent_audio_connection_complete_get_status(event)){ 214 printf("Audio connection establishment failed with status %u\n", hsp_subevent_audio_connection_complete_get_status(event)); 215 sco_handle = 0; 216 } else { 217 sco_handle = hsp_subevent_audio_connection_complete_get_handle(event); 218 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 219 hci_request_sco_can_send_now_event(); 220 } 221 break; 222 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 223 if (hsp_subevent_audio_disconnection_complete_get_status(event)){ 224 printf("Audio connection releasing failed with status %u\n", hsp_subevent_audio_disconnection_complete_get_status(event)); 225 } else { 226 printf("Audio connection released.\n\n"); 227 sco_handle = 0; 228 } 229 break; 230 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 231 printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); 232 break; 233 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 234 printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); 235 break; 236 case HSP_SUBEVENT_HS_COMMAND:{ 237 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 238 int cmd_length = hsp_subevent_hs_command_get_value_length(event); 239 int size = cmd_length <= sizeof(hs_cmd_buffer)? cmd_length : sizeof(hs_cmd_buffer); 240 memcpy(hs_cmd_buffer, hsp_subevent_hs_command_get_value(event), size - 1); 241 printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); 242 break; 243 } 244 default: 245 printf("event not handled %u\n", event[2]); 246 break; 247 } 248 break; 249 default: 250 break; 251 } 252 break; 253 default: 254 break; 255 } 256 } 257 258 /* @section Main Application Setup 259 * 260 * @text Listing MainConfiguration shows main application code. 261 * To run a HSP Audio Gateway service you need to initialize the SDP, and to create and register HSP AG record with it. 262 * In this example, the SCO over HCI is used to receive and send an audio signal. 263 * 264 * Two packet handlers are registered: 265 * - The HCI SCO packet handler receives audio data. 266 * - 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. 267 * 268 * The stdin_process callback allows for sending commands to the AG. 269 * At the end the Bluetooth stack is started. 270 */ 271 272 /* LISTING_START(MainConfiguration): Setup HSP Audio Gateway */ 273 int btstack_main(int argc, const char * argv[]); 274 int btstack_main(int argc, const char * argv[]){ 275 (void)argc; 276 (void)argv; 277 278 sco_demo_init(); 279 280 l2cap_init(); 281 282 sdp_init(); 283 284 memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 285 hsp_ag_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_ag_service_name); 286 printf("SDP service record size: %u\n", de_get_len(hsp_service_buffer)); 287 sdp_register_service(hsp_service_buffer); 288 289 rfcomm_init(); 290 291 hsp_ag_init(rfcomm_channel_nr); 292 hsp_ag_register_packet_handler(&packet_handler); 293 hci_register_sco_packet_handler(&packet_handler); 294 295 #ifdef HAVE_BTSTACK_STDIN 296 btstack_stdin_setup(stdin_process); 297 #endif 298 299 gap_set_local_name("BTstack HSP AG"); 300 gap_discoverable_control(1); 301 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 302 gap_set_class_of_device(0x400204); 303 304 // turn on! 305 hci_power_control(HCI_POWER_ON); 306 return 0; 307 } 308 /* LISTING_END */ 309 /* EXAMPLE_END */ 310