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 BLUEKITCHEN 24 * GMBH 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.c" 39 40 // ***************************************************************************** 41 // 42 // HSP Audio Gateway 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "bluetooth_sdp.h" 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "classic/core.h" 58 #include "classic/sdp_server.h" 59 #include "classic/sdp_client_rfcomm.h" 60 #include "classic/sdp_util.h" 61 #include "classic/sdp_client.h" 62 #include "hci.h" 63 #include "hci_cmd.h" 64 #include "hci_dump.h" 65 #include "hsp_ag.h" 66 #include "l2cap.h" 67 68 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 69 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 70 #define HSP_AG_OK "\r\nOK\r\n" 71 #define HSP_AG_ERROR "\r\nERROR\r\n" 72 #define HSP_AG_RING "\r\nRING\r\n" 73 #define HSP_MICROPHONE_GAIN "+VGM" 74 #define HSP_SPEAKER_GAIN "+VGS" 75 76 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 77 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 78 79 static const char hsp_ag_default_service_name[] = "Audio Gateway"; 80 81 typedef enum { 82 HSP_IDLE, 83 HSP_W2_SEND_SDP_QUERY, 84 HSP_W4_SDP_QUERY_COMPLETE, 85 HSP_W4_RFCOMM_CONNECTED, 86 87 HSP_RFCOMM_CONNECTION_ESTABLISHED, 88 89 HSP_W4_RING_ANSWER, 90 HSP_W4_USER_ACTION, 91 HSP_W2_CONNECT_SCO, 92 HSP_W4_SCO_CONNECTED, 93 94 HSP_AUDIO_CONNECTION_ESTABLISHED, 95 96 HSP_W2_DISCONNECT_SCO, 97 HSP_W4_SCO_DISCONNECTED, 98 99 HSP_W2_DISCONNECT_RFCOMM, 100 HSP_W4_RFCOMM_DISCONNECTED, 101 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 102 } hsp_state_t; 103 104 // higher-layer callbacks 105 static btstack_packet_handler_t hsp_ag_callback; 106 107 static hsp_state_t hsp_ag_state; 108 109 static int hsp_ag_microphone_gain; 110 static int hsp_ag_speaker_gain; 111 static uint8_t hsp_ag_ring; 112 static uint8_t hsp_ag_send_ok; 113 static uint8_t hsp_ag_send_error; 114 static uint8_t hsp_ag_support_custom_commands; 115 static uint8_t hsp_ag_disconnect_rfcomm; 116 static uint8_t hsp_ag_release_audio_connection_triggered; 117 static uint16_t hsp_ag_sco_packet_types; 118 119 static bd_addr_t hsp_ag_remote; 120 static uint8_t hsp_ag_channel_nr; 121 static uint16_t hsp_ag_rfcomm_cid; 122 static uint16_t hsp_ag_mtu; 123 124 static hci_con_handle_t hsp_ag_sco_handle; 125 static hci_con_handle_t hsp_ag_rfcomm_handle; 126 127 static btstack_timer_source_t hsp_ag_timeout; 128 129 static btstack_packet_callback_registration_t hci_event_callback_registration; 130 static btstack_context_callback_registration_t hsp_ag_handle_sdp_client_query_request; 131 132 static void hsp_run(void); 133 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 134 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 135 136 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 137 UNUSED(packet_type); // ok: no code 138 UNUSED(channel); // ok: no code 139 UNUSED(event); // ok: no code 140 UNUSED(size); // ok: no code 141 } 142 143 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 144 if (callback == NULL){ 145 callback = &dummy_notify; 146 } 147 hsp_ag_callback = callback; 148 } 149 150 static void emit_event(uint8_t event_subtype, uint8_t value){ 151 if (!hsp_ag_callback) return; 152 uint8_t event[4]; 153 event[0] = HCI_EVENT_HSP_META; 154 event[1] = sizeof(event) - 2; 155 event[2] = event_subtype; 156 event[3] = value; // status 0 == OK 157 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 158 } 159 160 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 161 if (!hsp_ag_callback) return; 162 uint8_t event[6]; 163 event[0] = HCI_EVENT_HSP_META; 164 event[1] = sizeof(event) - 2; 165 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 166 event[3] = status; 167 little_endian_store_16(event, 4, handle); 168 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 169 } 170 171 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 172 uint8_t* attribute; 173 de_create_sequence(service); 174 175 // 0x0000 "Service Record Handle" 176 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 177 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 178 179 // 0x0001 "Service Class ID List" 180 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 181 attribute = de_push_sequence(service); 182 { 183 // "UUID for PAN Service" 184 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 185 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 186 } 187 de_pop_sequence(service, attribute); 188 189 // 0x0004 "Protocol Descriptor List" 190 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 191 attribute = de_push_sequence(service); 192 { 193 uint8_t* l2cpProtocol = de_push_sequence(attribute); 194 { 195 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 196 } 197 de_pop_sequence(attribute, l2cpProtocol); 198 199 uint8_t* rfcomm = de_push_sequence(attribute); 200 { 201 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 202 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 203 } 204 de_pop_sequence(attribute, rfcomm); 205 } 206 de_pop_sequence(service, attribute); 207 208 // 0x0005 "Public Browse Group" 209 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 210 attribute = de_push_sequence(service); 211 { 212 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 213 } 214 de_pop_sequence(service, attribute); 215 216 // 0x0009 "Bluetooth Profile Descriptor List" 217 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 218 attribute = de_push_sequence(service); 219 { 220 uint8_t *sppProfile = de_push_sequence(attribute); 221 { 222 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 223 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 224 } 225 de_pop_sequence(attribute, sppProfile); 226 } 227 de_pop_sequence(service, attribute); 228 229 // 0x0100 "Service Name" 230 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 231 if (name){ 232 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 233 } else { 234 de_add_data(service, DE_STRING, strlen(hsp_ag_default_service_name), (uint8_t *) hsp_ag_default_service_name); 235 } 236 } 237 238 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, const char * command){ 239 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 240 if (err){ 241 log_error("rfcomm_send_internal -> error 0X%02x", err); 242 return err; 243 } 244 return err; 245 } 246 247 void hsp_ag_enable_custom_commands(int enable){ 248 hsp_ag_support_custom_commands = enable; 249 } 250 251 int hsp_ag_send_result(char * result){ 252 if (!hsp_ag_support_custom_commands) return 1; 253 return hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, result); 254 } 255 256 static void hsp_ag_reset_state(void){ 257 hsp_ag_state = HSP_IDLE; 258 259 hsp_ag_rfcomm_cid = 0; 260 hsp_ag_rfcomm_handle = HCI_CON_HANDLE_INVALID; 261 hsp_ag_channel_nr = 0; 262 hsp_ag_sco_handle = HCI_CON_HANDLE_INVALID; 263 264 hsp_ag_send_ok = 0; 265 hsp_ag_send_error = 0; 266 hsp_ag_ring = 0; 267 268 hsp_ag_support_custom_commands = 0; 269 270 hsp_ag_microphone_gain = -1; 271 hsp_ag_speaker_gain = -1; 272 273 hsp_ag_disconnect_rfcomm = 0; 274 hsp_ag_release_audio_connection_triggered = 0; 275 } 276 277 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 278 // register for HCI events 279 hci_event_callback_registration.callback = &packet_handler; 280 hci_add_event_handler(&hci_event_callback_registration); 281 282 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 283 284 hsp_ag_sco_packet_types = SCO_PACKET_TYPES_ALL; 285 hsp_ag_reset_state(); 286 } 287 288 void hsp_ag_deinit(void){ 289 hsp_ag_reset_state(); 290 hsp_ag_callback = NULL; 291 (void)memset(hsp_ag_remote, 0, 6); 292 (void)memset(&hsp_ag_timeout, 0, sizeof(btstack_timer_source_t)); 293 (void)memset(&hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 294 (void)memset(&hsp_ag_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 295 } 296 297 static void hsp_ag_handle_start_sdp_client_query(void * context){ 298 UNUSED(context); 299 if (hsp_ag_state != HSP_W2_SEND_SDP_QUERY) return; 300 301 hsp_ag_state = HSP_W4_SDP_QUERY_COMPLETE; 302 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(hsp_ag_remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 303 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, hsp_ag_remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 304 } 305 306 void hsp_ag_connect(bd_addr_t bd_addr){ 307 if (hsp_ag_state != HSP_IDLE) return; 308 309 (void)memcpy(hsp_ag_remote, bd_addr, 6); 310 hsp_ag_state = HSP_W2_SEND_SDP_QUERY; 311 hsp_ag_handle_sdp_client_query_request.callback = &hsp_ag_handle_start_sdp_client_query; 312 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 313 (void) sdp_client_register_query_callback(&hsp_ag_handle_sdp_client_query_request); 314 } 315 316 void hsp_ag_disconnect(void){ 317 hsp_ag_release_audio_connection(); 318 if (hsp_ag_state < HSP_W4_RFCOMM_CONNECTED){ 319 hsp_ag_state = HSP_IDLE; 320 return; 321 } 322 323 if (hsp_ag_state == HSP_W4_RFCOMM_CONNECTED){ 324 hsp_ag_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 325 return; 326 } 327 hsp_ag_disconnect_rfcomm = 1; 328 hsp_run(); 329 } 330 331 void hsp_ag_establish_audio_connection(void){ 332 switch (hsp_ag_state){ 333 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 334 hsp_ag_state = HSP_W2_CONNECT_SCO; 335 break; 336 case HSP_W4_RFCOMM_CONNECTED: 337 hsp_ag_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 338 break; 339 default: 340 break; 341 } 342 hsp_run(); 343 } 344 345 void hsp_ag_release_audio_connection(void){ 346 if (hsp_ag_state >= HSP_W2_DISCONNECT_SCO) return; 347 if (hsp_ag_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 348 349 hsp_ag_release_audio_connection_triggered = 1; 350 hsp_run(); 351 } 352 353 354 void hsp_ag_set_microphone_gain(uint8_t gain){ 355 if (gain >15) { 356 log_error("Gain must be in interval [0..15], it is given %d", gain); 357 return; 358 } 359 hsp_ag_microphone_gain = gain; 360 hsp_run(); 361 } 362 363 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 364 void hsp_ag_set_speaker_gain(uint8_t gain){ 365 if (gain >15) { 366 log_error("Gain must be in interval [0..15], it is given %d", gain); 367 return; 368 } 369 hsp_ag_speaker_gain = gain; 370 hsp_run(); 371 } 372 373 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 374 hsp_ag_ring = 1; 375 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 376 btstack_run_loop_add_timer(timer); 377 hsp_run(); 378 } 379 380 static void hsp_ringing_timer_start(void){ 381 btstack_run_loop_remove_timer(&hsp_ag_timeout); 382 btstack_run_loop_set_timer_handler(&hsp_ag_timeout, hsp_ringing_timeout_handler); 383 btstack_run_loop_set_timer(&hsp_ag_timeout, 2000); // 2 seconds timeout 384 btstack_run_loop_add_timer(&hsp_ag_timeout); 385 } 386 387 static void hsp_ringing_timer_stop(void){ 388 btstack_run_loop_remove_timer(&hsp_ag_timeout); 389 } 390 391 void hsp_ag_start_ringing(void){ 392 hsp_ag_ring = 1; 393 if (hsp_ag_state == HSP_W2_CONNECT_SCO) { 394 hsp_ag_state = HSP_W4_RING_ANSWER; 395 } 396 hsp_ringing_timer_start(); 397 } 398 399 void hsp_ag_stop_ringing(void){ 400 hsp_ag_ring = 0; 401 if (hsp_ag_state == HSP_W4_RING_ANSWER){ 402 hsp_ag_state = HSP_W2_CONNECT_SCO; 403 } 404 hsp_ringing_timer_stop(); 405 } 406 407 static void hsp_run(void){ 408 uint16_t packet_types; 409 410 if (hsp_ag_send_ok){ 411 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 412 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 413 return; 414 } 415 hsp_ag_send_ok = 0; 416 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_OK); 417 return; 418 } 419 420 if (hsp_ag_send_error){ 421 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 422 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 423 return; 424 } 425 hsp_ag_send_error = 0; 426 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_ERROR); 427 return; 428 } 429 430 if (hsp_ag_ring){ 431 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 432 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 433 return; 434 } 435 hsp_ag_ring = 0; 436 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_RING); 437 return; 438 } 439 440 if (hsp_ag_release_audio_connection_triggered){ 441 hsp_ag_release_audio_connection_triggered = 0; 442 gap_disconnect(hsp_ag_sco_handle); 443 return; 444 } 445 446 if (hsp_ag_disconnect_rfcomm){ 447 hsp_ag_disconnect_rfcomm = 0; 448 rfcomm_disconnect(hsp_ag_rfcomm_cid); 449 return; 450 } 451 452 switch (hsp_ag_state){ 453 454 case HSP_W4_RING_ANSWER: 455 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 456 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 457 return; 458 } 459 460 hsp_ag_send_ok = 0; 461 hsp_ag_state = HSP_W2_CONNECT_SCO; 462 463 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_OK); 464 break; 465 466 case HSP_W2_CONNECT_SCO: 467 if (!hci_can_send_command_packet_now()) return; 468 hsp_ag_state = HSP_W4_SCO_CONNECTED; 469 // bits 6-9 are 'don't use' 470 packet_types = hsp_ag_sco_packet_types ^ 0x3c0; 471 hci_send_cmd(&hci_setup_synchronous_connection, hsp_ag_rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, packet_types); 472 break; 473 474 case HSP_W2_DISCONNECT_SCO: 475 hsp_ag_state = HSP_W4_SCO_DISCONNECTED; 476 gap_disconnect(hsp_ag_sco_handle); 477 break; 478 479 case HSP_W2_DISCONNECT_RFCOMM: 480 rfcomm_disconnect(hsp_ag_rfcomm_cid); 481 break; 482 483 case HSP_AUDIO_CONNECTION_ESTABLISHED: 484 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 485 486 if (hsp_ag_microphone_gain >= 0){ 487 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 488 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 489 return; 490 } 491 int gain = hsp_ag_microphone_gain; 492 hsp_ag_microphone_gain = -1; 493 char buffer[12]; 494 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 495 HSP_MICROPHONE_GAIN, gain); 496 buffer[sizeof(buffer) - 1] = 0; 497 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, buffer); 498 break; 499 } 500 501 if (hsp_ag_speaker_gain >= 0){ 502 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 503 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 504 return; 505 } 506 int gain = hsp_ag_speaker_gain; 507 hsp_ag_speaker_gain = -1; 508 char buffer[12]; 509 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 510 HSP_SPEAKER_GAIN, gain); 511 buffer[sizeof(buffer) - 1] = 0; 512 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, buffer); 513 break; 514 } 515 break; 516 default: 517 break; 518 } 519 } 520 521 522 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 523 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 524 525 if (packet_type == RFCOMM_DATA_PACKET){ 526 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 527 size--; 528 packet++; 529 } 530 531 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 532 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 533 hsp_ag_send_ok = 1; 534 emit_event(HSP_SUBEVENT_BUTTON_PRESSED, 0); 535 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 536 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 537 hsp_ag_send_ok = 1; 538 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 539 540 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 541 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 542 hsp_ag_send_ok = 1; 543 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 544 545 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 546 hsp_ag_send_error = 1; 547 if (!hsp_ag_callback) return; 548 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 549 uint8_t * event = packet - 4; 550 event[0] = HCI_EVENT_HSP_META; 551 event[1] = size + 2; 552 event[2] = HSP_SUBEVENT_HS_COMMAND; 553 event[3] = size; 554 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 555 } 556 557 hsp_run(); 558 return; 559 } 560 561 if (packet_type != HCI_EVENT_PACKET) return; 562 uint8_t event = hci_event_packet_get_type(packet); 563 bd_addr_t event_addr; 564 uint16_t handle; 565 566 switch (event) { 567 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 568 if (hsp_ag_state != HSP_W4_SCO_CONNECTED) break; 569 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 570 if (status != 0){ 571 hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 572 log_error("(e)SCO Connection failed, status %u", status); 573 emit_event_audio_connected(status, hsp_ag_sco_handle); 574 break; 575 } 576 577 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 578 hsp_ag_sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 579 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 580 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 581 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 582 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 583 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 584 585 switch (link_type){ 586 case 0x00: 587 log_info("SCO Connection established."); 588 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 589 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 590 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 591 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 592 break; 593 case 0x02: 594 log_info("eSCO Connection established."); 595 break; 596 default: 597 log_error("(e)SCO reserved link_type 0x%2x", link_type); 598 break; 599 } 600 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 601 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", hsp_ag_sco_handle, 602 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 603 hci_event_synchronous_connection_complete_get_air_mode(packet)); 604 605 if (hsp_ag_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 606 hsp_ag_state = HSP_W2_DISCONNECT_SCO; 607 break; 608 } 609 610 hsp_ag_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 611 emit_event_audio_connected(status, hsp_ag_sco_handle); 612 break; 613 } 614 615 case RFCOMM_EVENT_INCOMING_CONNECTION: 616 if (hsp_ag_state != HSP_IDLE) return; 617 618 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 619 hsp_ag_rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 620 log_info("RFCOMM channel %u requested for %s with cid 0x%04x", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr), hsp_ag_rfcomm_cid); 621 hsp_ag_state = HSP_W4_RFCOMM_CONNECTED; 622 rfcomm_accept_connection(hsp_ag_rfcomm_cid); 623 break; 624 625 case RFCOMM_EVENT_CHANNEL_OPENED: 626 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 627 if (rfcomm_event_channel_opened_get_status(packet)) { 628 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 629 hsp_ag_reset_state(); 630 hsp_ag_state = HSP_IDLE; 631 } else { 632 hsp_ag_rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 633 hsp_ag_rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 634 hsp_ag_mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 635 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", hsp_ag_rfcomm_cid, hsp_ag_mtu, hsp_ag_state); 636 hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 637 } 638 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 639 break; 640 641 case RFCOMM_EVENT_CHANNEL_CLOSED: 642 hsp_ag_reset_state(); 643 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 644 break; 645 646 case RFCOMM_EVENT_CAN_SEND_NOW: 647 hsp_run(); 648 break; 649 650 case HCI_EVENT_DISCONNECTION_COMPLETE: 651 handle = little_endian_read_16(packet,3); 652 if (handle == hsp_ag_sco_handle){ 653 hsp_ag_sco_handle = HCI_CON_HANDLE_INVALID; 654 hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 655 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 656 break; 657 } 658 break; 659 660 default: 661 break; 662 } 663 664 hsp_run(); 665 } 666 667 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 668 UNUSED(packet_type); // ok: handling own sdp events 669 UNUSED(channel); // ok: no channel 670 UNUSED(size); // ok: handling own sdp events 671 672 switch (packet[0]){ 673 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 674 hsp_ag_channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 675 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), hsp_ag_channel_nr); 676 break; 677 case SDP_EVENT_QUERY_COMPLETE: 678 if (hsp_ag_channel_nr > 0){ 679 hsp_ag_state = HSP_W4_RFCOMM_CONNECTED; 680 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 681 rfcomm_create_channel(packet_handler, hsp_ag_remote, hsp_ag_channel_nr, NULL); 682 break; 683 } 684 hsp_ag_reset_state(); 685 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 686 if (sdp_event_query_complete_get_status(packet)){ 687 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 688 } else { 689 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 690 } 691 break; 692 default: 693 break; 694 } 695 } 696 697 void hsp_ag_set_sco_packet_types(uint16_t packet_types){ 698 hsp_ag_sco_packet_types = packet_types; 699 } 700 701