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 #ifdef ENABLE_RTK_PCM_WBS 133 static bool hsp_ag_rtk_send_sco_config; 134 #endif 135 136 static void hsp_run(void); 137 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 138 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 139 140 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 141 btstack_assert(callback != NULL); 142 hsp_ag_callback = callback; 143 } 144 145 static void emit_event(uint8_t event_subtype){ 146 if (!hsp_ag_callback) return; 147 uint8_t event[5]; 148 event[0] = HCI_EVENT_HSP_META; 149 event[1] = sizeof(event) - 2; 150 event[2] = event_subtype; 151 little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); 152 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 153 } 154 155 static void emit_event_with_value(uint8_t event_subtype, uint8_t value){ 156 if (!hsp_ag_callback) return; 157 uint8_t event[6]; 158 event[0] = HCI_EVENT_HSP_META; 159 event[1] = sizeof(event) - 2; 160 event[2] = event_subtype; 161 little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); 162 event[5] = value; 163 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 164 } 165 166 static void emit_event_rfcomm_connected(uint8_t status){ 167 if (!hsp_ag_callback) return; 168 uint8_t event[12]; 169 event[0] = HCI_EVENT_HSP_META; 170 event[1] = sizeof(event) - 2; 171 event[2] = HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE; 172 little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); 173 event[5] = status; 174 reverse_bd_addr(hsp_ag_remote, &event[6]); 175 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 176 } 177 178 static void emit_event_audio_connected(uint8_t status, uint16_t sco_handle){ 179 if (!hsp_ag_callback) return; 180 uint8_t event[8]; 181 event[0] = HCI_EVENT_HSP_META; 182 event[1] = sizeof(event) - 2; 183 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 184 little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); 185 event[5] = status; 186 little_endian_store_16(event, 6, sco_handle); 187 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 188 } 189 190 static void emit_event_audio_disconnected(uint16_t sco_handle){ 191 if (!hsp_ag_callback) return; 192 uint8_t event[7]; 193 event[0] = HCI_EVENT_HSP_META; 194 event[1] = sizeof(event) - 2; 195 event[2] = HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE; 196 little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); 197 little_endian_store_16(event, 5, sco_handle); 198 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 199 } 200 201 202 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 203 uint8_t* attribute; 204 de_create_sequence(service); 205 206 // 0x0000 "Service Record Handle" 207 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 208 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 209 210 // 0x0001 "Service Class ID List" 211 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 212 attribute = de_push_sequence(service); 213 { 214 // "UUID for PAN Service" 215 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 216 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 217 } 218 de_pop_sequence(service, attribute); 219 220 // 0x0004 "Protocol Descriptor List" 221 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 222 attribute = de_push_sequence(service); 223 { 224 uint8_t* l2cpProtocol = de_push_sequence(attribute); 225 { 226 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 227 } 228 de_pop_sequence(attribute, l2cpProtocol); 229 230 uint8_t* rfcomm = de_push_sequence(attribute); 231 { 232 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 233 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 234 } 235 de_pop_sequence(attribute, rfcomm); 236 } 237 de_pop_sequence(service, attribute); 238 239 // 0x0005 "Public Browse Group" 240 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 241 attribute = de_push_sequence(service); 242 { 243 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 244 } 245 de_pop_sequence(service, attribute); 246 247 // 0x0009 "Bluetooth Profile Descriptor List" 248 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 249 attribute = de_push_sequence(service); 250 { 251 uint8_t *sppProfile = de_push_sequence(attribute); 252 { 253 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 254 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 255 } 256 de_pop_sequence(attribute, sppProfile); 257 } 258 de_pop_sequence(service, attribute); 259 260 // 0x0100 "Service Name" 261 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 262 if (name){ 263 de_add_data(service, DE_STRING, (uint16_t) strlen(name), (uint8_t *) name); 264 } else { 265 de_add_data(service, DE_STRING, (uint16_t) strlen(hsp_ag_default_service_name), (uint8_t *) hsp_ag_default_service_name); 266 } 267 } 268 269 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, const char * command){ 270 int err = rfcomm_send(cid, (uint8_t*) command, (uint16_t) strlen(command)); 271 if (err){ 272 log_error("rfcomm_send_internal -> error 0X%02x", err); 273 return err; 274 } 275 return err; 276 } 277 278 void hsp_ag_enable_custom_commands(int enable){ 279 hsp_ag_support_custom_commands = enable; 280 } 281 282 int hsp_ag_send_result(char * result){ 283 if (!hsp_ag_support_custom_commands) return 1; 284 return hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, result); 285 } 286 287 static void hsp_ag_reset_state(void){ 288 hsp_ag_state = HSP_IDLE; 289 290 hsp_ag_rfcomm_cid = 0; 291 hsp_ag_rfcomm_handle = HCI_CON_HANDLE_INVALID; 292 hsp_ag_channel_nr = 0; 293 hsp_ag_sco_handle = HCI_CON_HANDLE_INVALID; 294 295 hsp_ag_send_ok = 0; 296 hsp_ag_send_error = 0; 297 hsp_ag_ring = 0; 298 299 hsp_ag_support_custom_commands = 0; 300 301 hsp_ag_microphone_gain = -1; 302 hsp_ag_speaker_gain = -1; 303 304 hsp_ag_disconnect_rfcomm = 0; 305 hsp_ag_release_audio_connection_triggered = 0; 306 } 307 308 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 309 // register for HCI events 310 hci_event_callback_registration.callback = &packet_handler; 311 hci_add_event_handler(&hci_event_callback_registration); 312 313 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 314 315 hsp_ag_sco_packet_types = SCO_PACKET_TYPES_ALL; 316 hsp_ag_reset_state(); 317 } 318 319 void hsp_ag_deinit(void){ 320 hsp_ag_reset_state(); 321 hsp_ag_callback = NULL; 322 (void)memset(hsp_ag_remote, 0, 6); 323 (void)memset(&hsp_ag_timeout, 0, sizeof(btstack_timer_source_t)); 324 (void)memset(&hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 325 (void)memset(&hsp_ag_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 326 } 327 328 static void hsp_ag_handle_start_sdp_client_query(void * context){ 329 UNUSED(context); 330 if (hsp_ag_state != HSP_W2_SEND_SDP_QUERY) return; 331 332 hsp_ag_state = HSP_W4_SDP_QUERY_COMPLETE; 333 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(hsp_ag_remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 334 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, hsp_ag_remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 335 } 336 337 void hsp_ag_connect(bd_addr_t bd_addr){ 338 if (hsp_ag_state != HSP_IDLE) return; 339 340 (void)memcpy(hsp_ag_remote, bd_addr, 6); 341 hsp_ag_state = HSP_W2_SEND_SDP_QUERY; 342 hsp_ag_handle_sdp_client_query_request.callback = &hsp_ag_handle_start_sdp_client_query; 343 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 344 (void) sdp_client_register_query_callback(&hsp_ag_handle_sdp_client_query_request); 345 } 346 347 void hsp_ag_disconnect(void){ 348 hsp_ag_release_audio_connection(); 349 if (hsp_ag_state < HSP_W4_RFCOMM_CONNECTED){ 350 hsp_ag_state = HSP_IDLE; 351 return; 352 } 353 354 if (hsp_ag_state == HSP_W4_RFCOMM_CONNECTED){ 355 hsp_ag_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 356 return; 357 } 358 hsp_ag_disconnect_rfcomm = 1; 359 hsp_run(); 360 } 361 362 void hsp_ag_establish_audio_connection(void){ 363 switch (hsp_ag_state){ 364 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 365 hsp_ag_state = HSP_W2_CONNECT_SCO; 366 break; 367 case HSP_W4_RFCOMM_CONNECTED: 368 hsp_ag_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 369 break; 370 default: 371 break; 372 } 373 hsp_run(); 374 } 375 376 void hsp_ag_release_audio_connection(void){ 377 if (hsp_ag_state >= HSP_W2_DISCONNECT_SCO) return; 378 if (hsp_ag_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 379 380 hsp_ag_release_audio_connection_triggered = 1; 381 hsp_run(); 382 } 383 384 385 void hsp_ag_set_microphone_gain(uint8_t gain){ 386 if (gain >15) { 387 log_error("Gain must be in interval [0..15], it is given %d", gain); 388 return; 389 } 390 hsp_ag_microphone_gain = gain; 391 hsp_run(); 392 } 393 394 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 395 void hsp_ag_set_speaker_gain(uint8_t gain){ 396 if (gain >15) { 397 log_error("Gain must be in interval [0..15], it is given %d", gain); 398 return; 399 } 400 hsp_ag_speaker_gain = gain; 401 hsp_run(); 402 } 403 404 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 405 hsp_ag_ring = 1; 406 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 407 btstack_run_loop_add_timer(timer); 408 hsp_run(); 409 } 410 411 static void hsp_ringing_timer_start(void){ 412 btstack_run_loop_remove_timer(&hsp_ag_timeout); 413 btstack_run_loop_set_timer_handler(&hsp_ag_timeout, hsp_ringing_timeout_handler); 414 btstack_run_loop_set_timer(&hsp_ag_timeout, 2000); // 2 seconds timeout 415 btstack_run_loop_add_timer(&hsp_ag_timeout); 416 } 417 418 static void hsp_ringing_timer_stop(void){ 419 btstack_run_loop_remove_timer(&hsp_ag_timeout); 420 } 421 422 void hsp_ag_start_ringing(void){ 423 hsp_ag_ring = 1; 424 if (hsp_ag_state == HSP_W2_CONNECT_SCO) { 425 hsp_ag_state = HSP_W4_RING_ANSWER; 426 } 427 hsp_ringing_timer_start(); 428 } 429 430 void hsp_ag_stop_ringing(void){ 431 hsp_ag_ring = 0; 432 if (hsp_ag_state == HSP_W4_RING_ANSWER){ 433 hsp_ag_state = HSP_W2_CONNECT_SCO; 434 } 435 hsp_ringing_timer_stop(); 436 } 437 438 static void hsp_run(void){ 439 uint16_t packet_types; 440 441 if (hsp_ag_send_ok){ 442 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 443 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 444 return; 445 } 446 hsp_ag_send_ok = 0; 447 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_OK); 448 return; 449 } 450 451 if (hsp_ag_send_error){ 452 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 453 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 454 return; 455 } 456 hsp_ag_send_error = 0; 457 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_ERROR); 458 return; 459 } 460 461 if (hsp_ag_ring){ 462 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 463 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 464 return; 465 } 466 hsp_ag_ring = 0; 467 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_RING); 468 return; 469 } 470 471 if (hsp_ag_release_audio_connection_triggered){ 472 hsp_ag_release_audio_connection_triggered = 0; 473 gap_disconnect(hsp_ag_sco_handle); 474 return; 475 } 476 477 if (hsp_ag_disconnect_rfcomm){ 478 hsp_ag_disconnect_rfcomm = 0; 479 rfcomm_disconnect(hsp_ag_rfcomm_cid); 480 return; 481 } 482 483 #ifdef ENABLE_RTK_PCM_WBS 484 if (hsp_ag_rtk_send_sco_config){ 485 hsp_ag_rtk_send_sco_config = false; 486 log_info("RTK SCO: 16k + CVSD"); 487 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 488 return; 489 } 490 #endif 491 492 switch (hsp_ag_state){ 493 494 case HSP_W4_RING_ANSWER: 495 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 496 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 497 return; 498 } 499 500 hsp_ag_send_ok = 0; 501 hsp_ag_state = HSP_W2_CONNECT_SCO; 502 503 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, HSP_AG_OK); 504 break; 505 506 case HSP_W2_CONNECT_SCO: 507 if (!hci_can_send_command_packet_now()) return; 508 hsp_ag_state = HSP_W4_SCO_CONNECTED; 509 // bits 6-9 are 'don't use' 510 packet_types = hsp_ag_sco_packet_types ^ 0x3c0; 511 hci_send_cmd(&hci_setup_synchronous_connection, hsp_ag_rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, packet_types); 512 break; 513 514 case HSP_W2_DISCONNECT_SCO: 515 hsp_ag_state = HSP_W4_SCO_DISCONNECTED; 516 gap_disconnect(hsp_ag_sco_handle); 517 break; 518 519 case HSP_W2_DISCONNECT_RFCOMM: 520 rfcomm_disconnect(hsp_ag_rfcomm_cid); 521 break; 522 523 case HSP_AUDIO_CONNECTION_ESTABLISHED: 524 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 525 526 if (hsp_ag_microphone_gain >= 0){ 527 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 528 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 529 return; 530 } 531 int gain = hsp_ag_microphone_gain; 532 hsp_ag_microphone_gain = -1; 533 char buffer[12]; 534 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 535 HSP_MICROPHONE_GAIN, gain); 536 buffer[sizeof(buffer) - 1] = 0; 537 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, buffer); 538 break; 539 } 540 541 if (hsp_ag_speaker_gain >= 0){ 542 if (!rfcomm_can_send_packet_now(hsp_ag_rfcomm_cid)) { 543 rfcomm_request_can_send_now_event(hsp_ag_rfcomm_cid); 544 return; 545 } 546 int gain = hsp_ag_speaker_gain; 547 hsp_ag_speaker_gain = -1; 548 char buffer[12]; 549 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 550 HSP_SPEAKER_GAIN, gain); 551 buffer[sizeof(buffer) - 1] = 0; 552 hsp_ag_send_str_over_rfcomm(hsp_ag_rfcomm_cid, buffer); 553 break; 554 } 555 break; 556 default: 557 break; 558 } 559 } 560 561 562 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 563 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 564 565 if (packet_type == RFCOMM_DATA_PACKET){ 566 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 567 size--; 568 packet++; 569 } 570 571 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 572 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 573 hsp_ag_send_ok = 1; 574 emit_event(HSP_SUBEVENT_BUTTON_PRESSED); 575 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 576 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 577 hsp_ag_send_ok = 1; 578 emit_event_with_value(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 579 580 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 581 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 582 hsp_ag_send_ok = 1; 583 emit_event_with_value(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 584 585 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 586 hsp_ag_send_error = 1; 587 if (!hsp_ag_callback) return; 588 if ((size + 4) > 255) return; 589 // re-use incoming buffer to avoid reserving buffers/memcpy - ugly but efficient 590 uint8_t * event = packet - 6; 591 event[0] = HCI_EVENT_HSP_META; 592 event[1] = (uint8_t) (size + 4); 593 event[2] = HSP_SUBEVENT_HS_COMMAND; 594 little_endian_store_16(event, 3, hsp_ag_rfcomm_handle); 595 event[5] = (uint8_t) size; 596 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+6); 597 } 598 599 hsp_run(); 600 return; 601 } 602 603 if (packet_type != HCI_EVENT_PACKET) return; 604 uint8_t event = hci_event_packet_get_type(packet); 605 bd_addr_t event_addr; 606 uint16_t handle; 607 uint8_t status; 608 609 switch (event) { 610 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 611 if (hsp_ag_state != HSP_W4_SCO_CONNECTED) break; 612 status = hci_event_synchronous_connection_complete_get_status(packet); 613 if (status != 0){ 614 hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 615 log_error("(e)SCO Connection failed, status %u", status); 616 emit_event_audio_connected(status, hsp_ag_sco_handle); 617 break; 618 } 619 620 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 621 hsp_ag_sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 622 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 623 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 624 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 625 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 626 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 627 628 switch (link_type){ 629 case 0x00: 630 log_info("SCO Connection established."); 631 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 632 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 633 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 634 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 635 break; 636 case 0x02: 637 log_info("eSCO Connection established."); 638 break; 639 default: 640 log_error("(e)SCO reserved link_type 0x%2x", link_type); 641 break; 642 } 643 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 644 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", hsp_ag_sco_handle, 645 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 646 hci_event_synchronous_connection_complete_get_air_mode(packet)); 647 648 if (hsp_ag_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 649 hsp_ag_state = HSP_W2_DISCONNECT_SCO; 650 break; 651 } 652 653 hsp_ag_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 654 emit_event_audio_connected(status, hsp_ag_sco_handle); 655 break; 656 } 657 658 case RFCOMM_EVENT_INCOMING_CONNECTION: 659 if (hsp_ag_state != HSP_IDLE) return; 660 661 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 662 hsp_ag_rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 663 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); 664 hsp_ag_state = HSP_W4_RFCOMM_CONNECTED; 665 rfcomm_accept_connection(hsp_ag_rfcomm_cid); 666 break; 667 668 case RFCOMM_EVENT_CHANNEL_OPENED: 669 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 670 status = rfcomm_event_channel_opened_get_status(packet); 671 if (status != ERROR_CODE_SUCCESS){ 672 log_info("RFCOMM channel open failed, status %u", status); 673 hsp_ag_reset_state(); 674 hsp_ag_state = HSP_IDLE; 675 memset(hsp_ag_remote, 0, 6); 676 } else { 677 hsp_ag_rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 678 hsp_ag_rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 679 rfcomm_event_channel_opened_get_bd_addr(packet, hsp_ag_remote); 680 hsp_ag_mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 681 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); 682 hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 683 #ifdef ENABLE_RTK_PCM_WBS 684 hsp_ag_rtk_send_sco_config = true; 685 #endif 686 } 687 emit_event_rfcomm_connected(status); 688 break; 689 690 case RFCOMM_EVENT_CHANNEL_CLOSED: 691 hsp_ag_reset_state(); 692 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE); 693 break; 694 695 case RFCOMM_EVENT_CAN_SEND_NOW: 696 hsp_run(); 697 break; 698 699 case HCI_EVENT_DISCONNECTION_COMPLETE: 700 handle = little_endian_read_16(packet,3); 701 if (handle == hsp_ag_sco_handle){ 702 hci_con_handle_t sco_handle = hsp_ag_sco_handle; 703 hsp_ag_sco_handle = HCI_CON_HANDLE_INVALID; 704 hsp_ag_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 705 emit_event_audio_disconnected(sco_handle); 706 break; 707 } 708 break; 709 710 default: 711 break; 712 } 713 714 hsp_run(); 715 } 716 717 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 718 UNUSED(packet_type); // ok: handling own sdp events 719 UNUSED(channel); // ok: no channel 720 UNUSED(size); // ok: handling own sdp events 721 722 switch (packet[0]){ 723 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 724 hsp_ag_channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 725 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), hsp_ag_channel_nr); 726 break; 727 case SDP_EVENT_QUERY_COMPLETE: 728 if (hsp_ag_channel_nr > 0){ 729 hsp_ag_state = HSP_W4_RFCOMM_CONNECTED; 730 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 731 rfcomm_create_channel(packet_handler, hsp_ag_remote, hsp_ag_channel_nr, NULL); 732 break; 733 } 734 hsp_ag_reset_state(); 735 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 736 if (sdp_event_query_complete_get_status(packet)){ 737 emit_event_with_value(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 738 } else { 739 emit_event_with_value(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 740 } 741 break; 742 default: 743 break; 744 } 745 } 746 747 void hsp_ag_set_sco_packet_types(uint16_t packet_types){ 748 hsp_ag_sco_packet_types = packet_types; 749 } 750 751