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("m - set microphone gain 8\n"); 116 printf("M - set microphone gain 15\n"); 117 printf("o - set speaker gain 0\n"); 118 printf("s - set speaker gain 8\n"); 119 printf("S - set speaker gain 15\n"); 120 printf("r - start ringing\n"); 121 printf("t - stop ringing\n"); 122 printf("\n"); 123 } 124 125 static void stdin_process(char c){ 126 switch (c){ 127 case 'c': 128 printf("Connect to %s\n", device_addr_string); 129 hsp_ag_connect(device_addr); 130 break; 131 case 'C': 132 printf("Disconnect.\n"); 133 hsp_ag_disconnect(); 134 break; 135 case 'a': 136 printf("Establish audio connection\n"); 137 hsp_ag_establish_audio_connection(); 138 break; 139 case 'A': 140 printf("Release audio connection\n"); 141 hsp_ag_release_audio_connection(); 142 break; 143 case 'm': 144 printf("Setting microphone gain 8\n"); 145 hsp_ag_set_microphone_gain(8); 146 break; 147 case 'M': 148 printf("Setting microphone gain 15\n"); 149 hsp_ag_set_microphone_gain(15); 150 break; 151 case 'o': 152 printf("Setting speaker gain 0\n"); 153 hsp_ag_set_speaker_gain(0); 154 break; 155 case 's': 156 printf("Setting speaker gain 8\n"); 157 hsp_ag_set_speaker_gain(8); 158 break; 159 case 'S': 160 printf("Setting speaker gain 15\n"); 161 hsp_ag_set_speaker_gain(15); 162 break; 163 case 'r': 164 printf("Start ringing\n"); 165 hsp_ag_start_ringing(); 166 break; 167 case 't': 168 printf("Stop ringing\n"); 169 hsp_ag_stop_ringing(); 170 break; 171 default: 172 show_usage(); 173 break; 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 case HCI_SCO_DATA_PACKET: 183 if (READ_SCO_CONNECTION_HANDLE(event) != sco_handle) break; 184 sco_demo_receive(event, event_size); 185 break; 186 187 case HCI_EVENT_PACKET: 188 switch (hci_event_packet_get_type(event)) { 189 #ifndef HAVE_BTSTACK_STDIN 190 case BTSTACK_EVENT_STATE: 191 if (btstack_event_state_get_state(event) != HCI_STATE_WORKING) break; 192 printf("Establish HSP AG service to %s...\n", device_addr_string); 193 hsp_ag_connect(device_addr); 194 break; 195 #endif 196 case HCI_EVENT_SCO_CAN_SEND_NOW: 197 sco_demo_send(sco_handle); 198 break; 199 case HCI_EVENT_HSP_META: 200 switch (event[2]) { 201 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 202 if (hsp_subevent_rfcomm_connection_complete_get_status(event)){ 203 printf("RFCOMM connection establishement failed with status %u\n", hsp_subevent_rfcomm_connection_complete_get_status(event)); 204 break; 205 } 206 printf("RFCOMM connection established.\n"); 207 #ifndef HAVE_BTSTACK_STDIN 208 printf("Establish Audio connection to %s...\n", device_addr_string); 209 hsp_ag_establish_audio_connection(); 210 #endif 211 break; 212 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 213 if (hsp_subevent_rfcomm_disconnection_complete_get_status(event)){ 214 printf("RFCOMM disconnection failed with status %u.\n", hsp_subevent_rfcomm_disconnection_complete_get_status(event)); 215 } else { 216 printf("RFCOMM disconnected.\n"); 217 } 218 break; 219 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 220 if (hsp_subevent_audio_connection_complete_get_status(event)){ 221 printf("Audio connection establishment failed with status %u\n", hsp_subevent_audio_connection_complete_get_status(event)); 222 } else { 223 sco_handle = hsp_subevent_audio_connection_complete_get_handle(event); 224 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 225 hci_request_sco_can_send_now_event(); 226 } 227 break; 228 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 229 printf("Audio connection released.\n\n"); 230 sco_handle = HCI_CON_HANDLE_INVALID; 231 break; 232 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 233 printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); 234 break; 235 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 236 printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); 237 break; 238 case HSP_SUBEVENT_HS_COMMAND:{ 239 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 240 unsigned int cmd_length = hsp_subevent_hs_command_get_value_length(event); 241 unsigned int size = cmd_length <= sizeof(hs_cmd_buffer)? cmd_length : sizeof(hs_cmd_buffer); 242 memcpy(hs_cmd_buffer, hsp_subevent_hs_command_get_value(event), size - 1); 243 printf("Received custom command: \"%s\". \nExit code or call hsp_ag_send_result.\n", hs_cmd_buffer); 244 break; 245 } 246 default: 247 printf("event not handled %u\n", event[2]); 248 break; 249 } 250 break; 251 default: 252 break; 253 } 254 break; 255 default: 256 break; 257 } 258 } 259 260 /* @section Main Application Setup 261 * 262 * @text Listing MainConfiguration shows main application code. 263 * To run a HSP Audio Gateway service you need to initialize the SDP, and to create and register HSP AG record with it. 264 * In this example, the SCO over HCI is used to receive and send an audio signal. 265 * 266 * Two packet handlers are registered: 267 * - The HCI SCO packet handler receives audio data. 268 * - 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. 269 * 270 * The stdin_process callback allows for sending commands to the AG. 271 * At the end the Bluetooth stack is started. 272 */ 273 274 /* LISTING_START(MainConfiguration): Setup HSP Audio Gateway */ 275 int btstack_main(int argc, const char * argv[]); 276 int btstack_main(int argc, const char * argv[]){ 277 (void)argc; 278 (void)argv; 279 280 sco_demo_init(); 281 sco_demo_set_codec(HFP_CODEC_CVSD); 282 283 l2cap_init(); 284 285 sdp_init(); 286 287 memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 288 hsp_ag_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_ag_service_name); 289 printf("SDP service record size: %u\n", de_get_len(hsp_service_buffer)); 290 sdp_register_service(hsp_service_buffer); 291 292 rfcomm_init(); 293 294 hsp_ag_init(rfcomm_channel_nr); 295 hsp_ag_register_packet_handler(&packet_handler); 296 297 // register for SCO packets 298 hci_register_sco_packet_handler(&packet_handler); 299 300 // parse human readable Bluetooth address 301 sscanf_bd_addr(device_addr_string, device_addr); 302 303 #ifdef HAVE_BTSTACK_STDIN 304 btstack_stdin_setup(stdin_process); 305 #endif 306 307 gap_set_local_name(device_name); 308 gap_discoverable_control(1); 309 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 310 gap_set_class_of_device(0x400204); 311 312 // turn on! 313 hci_power_control(HCI_POWER_ON); 314 return 0; 315 } 316 /* LISTING_END */ 317 /* EXAMPLE_END */ 318