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__ "hfp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HFP Audio Gateway (AG) unit 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "hci_cmd.h" 53 #include "btstack_run_loop.h" 54 55 #include "bluetooth_sdp.h" 56 #include "hci.h" 57 #include "btstack_memory.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 #include "btstack_debug.h" 61 #include "btstack_event.h" 62 #include "classic/core.h" 63 #include "classic/hfp.h" 64 #include "classic/hfp_ag.h" 65 #include "classic/hfp_gsm_model.h" 66 #include "classic/sdp_client_rfcomm.h" 67 #include "classic/sdp_server.h" 68 #include "classic/sdp_util.h" 69 70 // private prototypes 71 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection); 72 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection); 73 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection); 74 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection); 75 76 // public prototypes 77 hfp_generic_status_indicator_t * get_hfp_generic_status_indicators(void); 78 int get_hfp_generic_status_indicators_nr(void); 79 void set_hfp_generic_status_indicators(hfp_generic_status_indicator_t * indicators, int indicator_nr); 80 void set_hfp_ag_indicators(hfp_ag_indicator_t * indicators, int indicator_nr); 81 int get_hfp_ag_indicators_nr(hfp_connection_t * context); 82 hfp_ag_indicator_t * get_hfp_ag_indicators(hfp_connection_t * context); 83 84 #define HFP_SUBEVENT_INVALID 0xFFFF 85 86 // const 87 static const char hfp_ag_default_service_name[] = "Voice gateway"; 88 89 // globals 90 91 // higher layer callbacks 92 static btstack_packet_handler_t hfp_ag_callback; 93 94 static btstack_packet_callback_registration_t hfp_ag_hci_event_callback_registration; 95 96 static uint16_t hfp_ag_supported_features; 97 98 // codecs 99 static uint8_t hfp_ag_codecs_nr; 100 static uint8_t hfp_ag_codecs[HFP_MAX_NUM_CODECS]; 101 102 // AG indicators 103 static int hfp_ag_indicators_nr; 104 static hfp_ag_indicator_t hfp_ag_indicators[HFP_MAX_NUM_INDICATORS]; 105 106 // generic status indicators 107 static int hfp_ag_generic_status_indicators_nr; 108 static hfp_generic_status_indicator_t hfp_ag_generic_status_indicators[HFP_MAX_NUM_INDICATORS]; 109 110 static int hfp_ag_call_hold_services_nr; 111 static char * hfp_ag_call_hold_services[6]; 112 113 static hfp_response_and_hold_state_t hfp_ag_response_and_hold_state; 114 static int hfp_ag_response_and_hold_active; 115 116 // Subscriber information entries 117 static hfp_phone_number_t * hfp_ag_subscriber_numbers; 118 static int hfp_ag_subscriber_numbers_count; 119 120 // call state 121 static btstack_timer_source_t hfp_ag_ring_timeout; 122 123 // code 124 static int hfp_ag_get_ag_indicators_nr(hfp_connection_t * hfp_connection){ 125 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 126 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 127 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 128 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 129 } 130 return hfp_connection->ag_indicators_nr; 131 } 132 133 hfp_ag_indicator_t * hfp_ag_get_ag_indicators(hfp_connection_t * hfp_connection){ 134 // TODO: save only value, and value changed in the hfp_connection? 135 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 136 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 137 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 138 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 139 } 140 return (hfp_ag_indicator_t *)&(hfp_connection->ag_indicators); 141 } 142 143 static hfp_ag_indicator_t * get_ag_indicator_for_name(const char * name){ 144 int i; 145 for (i = 0; i < hfp_ag_indicators_nr; i++){ 146 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 147 return &hfp_ag_indicators[i]; 148 } 149 } 150 return NULL; 151 } 152 153 static int get_ag_indicator_index_for_name(const char * name){ 154 int i; 155 for (i = 0; i < hfp_ag_indicators_nr; i++){ 156 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 157 return i; 158 } 159 } 160 return -1; 161 } 162 163 static hfp_connection_t * get_hfp_ag_connection_context_for_acl_handle(uint16_t handle){ 164 btstack_linked_list_iterator_t it; 165 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 166 while (btstack_linked_list_iterator_has_next(&it)){ 167 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 168 if (hfp_connection->acl_handle != handle) continue; 169 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 170 return hfp_connection; 171 } 172 return NULL; 173 } 174 175 static int use_in_band_tone(void){ 176 return get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE); 177 } 178 179 static int has_codec_negotiation_feature(hfp_connection_t * hfp_connection){ 180 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_CODEC_NEGOTIATION); 181 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_CODEC_NEGOTIATION); 182 return hf && ag; 183 } 184 185 static int has_call_waiting_and_3way_calling_feature(hfp_connection_t * hfp_connection){ 186 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_THREE_WAY_CALLING); 187 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_THREE_WAY_CALLING); 188 return hf && ag; 189 } 190 191 static int has_hf_indicators_feature(hfp_connection_t * hfp_connection){ 192 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_HF_INDICATORS); 193 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_HF_INDICATORS); 194 return hf && ag; 195 } 196 197 /* unsolicited responses */ 198 199 static int hfp_ag_send_change_in_band_ring_tone_setting_cmd(uint16_t cid){ 200 char buffer[20]; 201 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", 202 HFP_CHANGE_IN_BAND_RING_TONE_SETTING, use_in_band_tone()); 203 buffer[sizeof(buffer) - 1] = 0; 204 return send_str_over_rfcomm(cid, buffer); 205 } 206 207 static int hfp_ag_exchange_supported_features_cmd(uint16_t cid){ 208 char buffer[40]; 209 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n\r\nOK\r\n", 210 HFP_SUPPORTED_FEATURES, hfp_ag_supported_features); 211 buffer[sizeof(buffer) - 1] = 0; 212 return send_str_over_rfcomm(cid, buffer); 213 } 214 215 static int hfp_ag_send_ok(uint16_t cid){ 216 char buffer[10]; 217 snprintf(buffer, sizeof(buffer), "\r\nOK\r\n"); 218 buffer[sizeof(buffer) - 1] = 0; 219 return send_str_over_rfcomm(cid, buffer); 220 } 221 222 static int hfp_ag_send_ring(uint16_t cid){ 223 return send_str_over_rfcomm(cid, (char *) "\r\nRING\r\n"); 224 } 225 226 static int hfp_ag_send_no_carrier(uint16_t cid){ 227 char buffer[15]; 228 snprintf(buffer, sizeof(buffer), "\r\nNO CARRIER\r\n"); 229 buffer[sizeof(buffer) - 1] = 0; 230 return send_str_over_rfcomm(cid, buffer); 231 } 232 233 static int hfp_ag_send_clip(uint16_t cid){ 234 char buffer[50]; 235 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", HFP_ENABLE_CLIP, 236 hfp_gsm_clip_number(), hfp_gsm_clip_type()); 237 buffer[sizeof(buffer) - 1] = 0; 238 return send_str_over_rfcomm(cid, buffer); 239 } 240 241 static int hfp_send_subscriber_number_cmd(uint16_t cid, uint8_t type, const char * number){ 242 char buffer[50]; 243 snprintf(buffer, sizeof(buffer), "\r\n%s: ,\"%s\",%u, , \r\n", 244 HFP_SUBSCRIBER_NUMBER_INFORMATION, number, type); 245 buffer[sizeof(buffer) - 1] = 0; 246 return send_str_over_rfcomm(cid, buffer); 247 } 248 249 static int hfp_ag_send_phone_number_for_voice_tag_cmd(uint16_t cid){ 250 char buffer[50]; 251 snprintf(buffer, sizeof(buffer), "\r\n%s: %s\r\n", 252 HFP_PHONE_NUMBER_FOR_VOICE_TAG, hfp_gsm_clip_number()); 253 buffer[sizeof(buffer) - 1] = 0; 254 return send_str_over_rfcomm(cid, buffer); 255 } 256 257 static int hfp_ag_send_call_waiting_notification(uint16_t cid){ 258 char buffer[50]; 259 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", 260 HFP_ENABLE_CALL_WAITING_NOTIFICATION, hfp_gsm_clip_number(), 261 hfp_gsm_clip_type()); 262 buffer[sizeof(buffer) - 1] = 0; 263 return send_str_over_rfcomm(cid, buffer); 264 } 265 266 static int hfp_ag_send_error(uint16_t cid){ 267 char buffer[10]; 268 snprintf(buffer, sizeof(buffer), "\r\nERROR\r\n"); 269 buffer[sizeof(buffer) - 1] = 0; 270 return send_str_over_rfcomm(cid, buffer); 271 } 272 273 static int hfp_ag_send_report_extended_audio_gateway_error(uint16_t cid, uint8_t error){ 274 char buffer[20]; 275 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 276 HFP_EXTENDED_AUDIO_GATEWAY_ERROR, error); 277 buffer[sizeof(buffer) - 1] = 0; 278 return send_str_over_rfcomm(cid, buffer); 279 } 280 281 // get size for indicator string 282 static int hfp_ag_indicators_string_size(hfp_connection_t * hfp_connection, int i){ 283 // template: ("$NAME",($MIN,$MAX)) 284 return 8 + (int) strlen(hfp_ag_get_ag_indicators(hfp_connection)[i].name) 285 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range) 286 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range); 287 } 288 289 // store indicator 290 static void hfp_ag_indicators_string_store(hfp_connection_t * hfp_connection, int i, uint8_t * buffer, uint16_t buffer_size){ 291 snprintf((char *)buffer, buffer_size, "(\"%s\",(%d,%d)),", 292 hfp_ag_get_ag_indicators(hfp_connection)[i].name, 293 hfp_ag_get_ag_indicators(hfp_connection)[i].min_range, 294 hfp_ag_get_ag_indicators(hfp_connection)[i].max_range); 295 ((char *)buffer)[buffer_size - 1] = 0; 296 } 297 298 // structure: header [indicator [comma indicator]] footer 299 static int hfp_ag_indicators_cmd_generator_num_segments(hfp_connection_t * hfp_connection){ 300 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 301 if (!num_indicators) return 2; 302 return 3 + ((num_indicators-1) * 2); 303 } 304 305 // get size of individual segment for hfp_ag_retrieve_indicators_cmd 306 static int hfp_ag_indicators_cmd_generator_get_segment_len(hfp_connection_t * hfp_connection, int index){ 307 if (index == 0) { 308 return strlen(HFP_INDICATOR) + 3; // "\n\r%s:"" 309 } 310 index--; 311 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 312 int indicator_index = index >> 1; 313 if ((index & 1) == 0){ 314 return hfp_ag_indicators_string_size(hfp_connection, indicator_index); 315 } 316 if (indicator_index == (num_indicators - 1)){ 317 return 8; // "\r\n\r\nOK\r\n" 318 } 319 return 1; // comma 320 } 321 322 static void hfp_ag_indicators_cmd_generator_store_segment(hfp_connection_t * hfp_connection, int index, uint8_t * buffer, uint16_t buffer_size){ 323 if (index == 0){ 324 *buffer++ = '\r'; 325 *buffer++ = '\n'; 326 int len = strlen(HFP_INDICATOR); 327 (void)memcpy(buffer, HFP_INDICATOR, len); 328 buffer += len; 329 *buffer++ = ':'; 330 return; 331 } 332 index--; 333 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 334 int indicator_index = index >> 1; 335 if ((index & 1) == 0){ 336 hfp_ag_indicators_string_store(hfp_connection, indicator_index, buffer, buffer_size); 337 return; 338 } 339 if (indicator_index == (num_indicators-1)){ 340 (void)memcpy(buffer, "\r\n\r\nOK\r\n", 8); 341 return; 342 } 343 *buffer = ','; 344 } 345 346 static int hfp_ag_generic_indicators_join(char * buffer, int buffer_size){ 347 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 348 int i; 349 int offset = 0; 350 for (i = 0; i < (hfp_ag_generic_status_indicators_nr - 1); i++) { 351 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_generic_status_indicators[i].uuid); 352 } 353 if (i < hfp_ag_generic_status_indicators_nr){ 354 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_generic_status_indicators[i].uuid); 355 } 356 return offset; 357 } 358 359 static int hfp_ag_generic_indicators_initial_status_join(char * buffer, int buffer_size){ 360 if (buffer_size < (hfp_ag_generic_status_indicators_nr * 3)) return 0; 361 int i; 362 int offset = 0; 363 for (i = 0; i < hfp_ag_generic_status_indicators_nr; i++) { 364 offset += snprintf(buffer+offset, buffer_size-offset, "\r\n%s:%d,%d\r\n", HFP_GENERIC_STATUS_INDICATOR, hfp_ag_generic_status_indicators[i].uuid, hfp_ag_generic_status_indicators[i].state); 365 } 366 return offset; 367 } 368 369 static int hfp_ag_indicators_status_join(char * buffer, int buffer_size){ 370 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 371 int i; 372 int offset = 0; 373 for (i = 0; i < (hfp_ag_indicators_nr-1); i++) { 374 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_indicators[i].status); 375 } 376 if (i<hfp_ag_indicators_nr){ 377 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_indicators[i].status); 378 } 379 return offset; 380 } 381 382 static int hfp_ag_call_services_join(char * buffer, int buffer_size){ 383 if (buffer_size < (hfp_ag_call_hold_services_nr * 3)) return 0; 384 int i; 385 int offset = snprintf(buffer, buffer_size, "("); 386 for (i = 0; i < (hfp_ag_call_hold_services_nr-1); i++) { 387 offset += snprintf(buffer+offset, buffer_size-offset, "%s,", hfp_ag_call_hold_services[i]); 388 } 389 if (i<hfp_ag_call_hold_services_nr){ 390 offset += snprintf(buffer+offset, buffer_size-offset, "%s)", hfp_ag_call_hold_services[i]); 391 } 392 return offset; 393 } 394 395 static int hfp_ag_send_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, 396 int start_segment, int num_segments, 397 int (*get_segment_len)(hfp_connection_t * hfp_connection, int segment), 398 void (*store_segment) (hfp_connection_t * hfp_connection, int segment, uint8_t * buffer, uint16_t buffer_size)){ 399 400 // assumes: can send now == true 401 // assumes: num segments > 0 402 // assumes: individual segments are smaller than MTU 403 rfcomm_reserve_packet_buffer(); 404 int mtu = rfcomm_get_max_frame_size(cid); 405 uint8_t * data = rfcomm_get_outgoing_buffer(); 406 int offset = 0; 407 int segment = start_segment; 408 while (segment < num_segments){ 409 int segment_len = get_segment_len(hfp_connection, segment); 410 if ((offset + segment_len + 1) > mtu) break; 411 // append segment. As it appends a '\0', we provide a buffer one byte larger 412 store_segment(hfp_connection, segment, data+offset, segment_len + 1); 413 offset += segment_len; 414 segment++; 415 } 416 rfcomm_send_prepared(cid, offset); 417 #ifdef ENABLE_HFP_AT_MESSAGES 418 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_SENT, (char *) data); 419 #endif 420 return segment; 421 } 422 423 // returns next segment to store 424 static int hfp_ag_send_retrieve_indicators_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, int start_segment){ 425 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 426 return hfp_ag_send_cmd_via_generator(cid, hfp_connection, start_segment, num_segments, 427 hfp_ag_indicators_cmd_generator_get_segment_len, 428 hfp_ag_indicators_cmd_generator_store_segment); 429 } 430 431 static int hfp_ag_send_retrieve_indicators_status_cmd(uint16_t cid){ 432 char buffer[40]; 433 const int size = sizeof(buffer); 434 int offset = snprintf(buffer, size, "\r\n%s:", HFP_INDICATOR); 435 offset += hfp_ag_indicators_status_join(buffer+offset, size-offset-9); 436 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 437 return send_str_over_rfcomm(cid, buffer); 438 } 439 440 static int hfp_ag_send_retrieve_can_hold_call_cmd(uint16_t cid){ 441 char buffer[40]; 442 const int size = sizeof(buffer); 443 int offset = snprintf(buffer, size, "\r\n%s:", HFP_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES); 444 offset += hfp_ag_call_services_join(buffer+offset, size-offset-9); 445 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 446 return send_str_over_rfcomm(cid, buffer); 447 } 448 449 450 static int hfp_ag_send_list_supported_generic_status_indicators_cmd(uint16_t cid){ 451 return hfp_ag_send_ok(cid); 452 } 453 454 static int hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(uint16_t cid){ 455 char buffer[40]; 456 const int size = sizeof(buffer); 457 int offset = snprintf(buffer, size, "\r\n%s:(", HFP_GENERIC_STATUS_INDICATOR); 458 offset += hfp_ag_generic_indicators_join(buffer + offset, size - offset - 10); 459 offset += snprintf(buffer+offset, size-offset, ")\r\n\r\nOK\r\n"); 460 return send_str_over_rfcomm(cid, buffer); 461 } 462 463 static int hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(uint16_t cid){ 464 char buffer[40]; 465 int offset = hfp_ag_generic_indicators_initial_status_join(buffer, sizeof(buffer) - 7); 466 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\nOK\r\n"); 467 return send_str_over_rfcomm(cid, buffer); 468 } 469 470 static int hfp_ag_send_transfer_ag_indicators_status_cmd(uint16_t cid, hfp_ag_indicator_t * indicator){ 471 char buffer[20]; 472 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d\r\n", 473 HFP_TRANSFER_AG_INDICATOR_STATUS, indicator->index, 474 indicator->status); 475 buffer[sizeof(buffer) - 1] = 0; 476 return send_str_over_rfcomm(cid, buffer); 477 } 478 479 static int hfp_ag_send_report_network_operator_name_cmd(uint16_t cid, hfp_network_opearator_t op){ 480 char buffer[41]; 481 if (strlen(op.name) == 0){ 482 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,,\r\n\r\nOK\r\n", HFP_QUERY_OPERATOR_SELECTION, op.mode); 483 } else { 484 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d,", HFP_QUERY_OPERATOR_SELECTION, op.mode, op.format); 485 offset += snprintf(buffer+offset, 16, "%s", op.name); 486 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n\r\nOK\r\n"); 487 } 488 return send_str_over_rfcomm(cid, buffer); 489 } 490 491 static inline int hfp_ag_send_cmd_with_space_and_int(uint16_t cid, const char * cmd, uint8_t value){ 492 char buffer[30]; 493 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", cmd, value); 494 return send_str_over_rfcomm(cid, buffer); 495 } 496 497 498 static inline int hfp_ag_send_cmd_with_int(uint16_t cid, const char * cmd, uint8_t value){ 499 char buffer[30]; 500 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n", cmd, value); 501 return send_str_over_rfcomm(cid, buffer); 502 } 503 504 static int hfp_ag_send_suggest_codec_cmd(uint16_t cid, uint8_t codec){ 505 return hfp_ag_send_cmd_with_int(cid, HFP_CONFIRM_COMMON_CODEC, codec); 506 } 507 508 static int hfp_ag_send_set_speaker_gain_cmd(uint16_t cid, uint8_t gain){ 509 return hfp_ag_send_cmd_with_int(cid, HFP_SET_SPEAKER_GAIN, gain); 510 } 511 512 static int hfp_ag_send_set_microphone_gain_cmd(uint16_t cid, uint8_t gain){ 513 return hfp_ag_send_cmd_with_int(cid, HFP_SET_MICROPHONE_GAIN, gain); 514 } 515 516 static int hfp_ag_send_set_response_and_hold(uint16_t cid, int state){ 517 return hfp_ag_send_cmd_with_space_and_int(cid, HFP_RESPONSE_AND_HOLD, state); 518 } 519 520 static int hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection_t * hfp_connection){ 521 char buffer[30]; 522 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, hfp_connection->enhanced_voice_recognition_enabled, hfp_connection->ag_vra_state); 523 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 524 } 525 526 static int hfp_ag_send_voice_recognition_cmd(hfp_connection_t * hfp_connection, uint8_t activate_voice_recognition){ 527 char buffer[30]; 528 if (hfp_connection->enhanced_voice_recognition_enabled){ 529 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition, hfp_connection->ag_vra_state); 530 } else { 531 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition); 532 } 533 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 534 } 535 536 static int hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection_t * hfp_connection){ 537 char buffer[100]; 538 snprintf(buffer, sizeof(buffer), "\r\n%s: 1,%d,%X,%d,%d,\"%s\"\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, 539 hfp_connection->ag_vra_state, 540 hfp_connection->ag_msg.text_id, 541 hfp_connection->ag_msg.text_type, 542 hfp_connection->ag_msg.text_operation, 543 hfp_connection->ag_msg.text); 544 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 545 } 546 547 static uint8_t hfp_ag_suggest_codec(hfp_connection_t *hfp_connection){ 548 if (hfp_connection->sco_for_msbc_failed) return HFP_CODEC_CVSD; 549 550 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_ag_codecs_nr, hfp_ag_codecs)){ 551 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 552 return HFP_CODEC_MSBC; 553 } 554 } 555 return HFP_CODEC_CVSD; 556 } 557 558 /* state machines */ 559 560 static uint8_t hfp_ag_esco_s4_supported(hfp_connection_t * hfp_connection){ 561 return (hfp_connection->remote_supported_features & (1<<HFP_HFSF_ESCO_S4)) && (hfp_ag_supported_features & (1 << HFP_AGSF_ESCO_S4)); 562 } 563 564 static int codecs_exchange_state_machine(hfp_connection_t * hfp_connection){ 565 /* events ( == commands): 566 HFP_CMD_AVAILABLE_CODECS == received AT+BAC with list of codecs 567 HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 568 hf_trigger_codec_connection_setup == received BCC 569 ag_trigger_codec_connection_setup == received from AG to send BCS 570 HFP_CMD_HF_CONFIRMED_CODEC == received AT+BCS 571 */ 572 switch (hfp_connection->codecs_state){ 573 case HFP_CODECS_EXCHANGED: 574 if (hfp_connection->command == HFP_CMD_AVAILABLE_CODECS){ 575 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 576 return 1; 577 } 578 break; 579 580 case HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE: 581 hfp_connection->command = HFP_CMD_AG_SEND_COMMON_CODEC; 582 break; 583 case HFP_CODECS_AG_RESEND_COMMON_CODEC: 584 hfp_connection->command = HFP_CMD_AG_SEND_COMMON_CODEC; 585 break; 586 default: 587 break; 588 } 589 590 switch (hfp_connection->command){ 591 case HFP_CMD_AVAILABLE_CODECS: 592 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 593 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_LIST; 594 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 595 return 1; 596 } 597 598 switch (hfp_connection->codecs_state){ 599 case HFP_CODECS_AG_SENT_COMMON_CODEC: 600 hfp_connection->codecs_state = HFP_CODECS_AG_RESEND_COMMON_CODEC; 601 break; 602 default: 603 break; 604 } 605 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 606 return 1; 607 608 case HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 609 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE; 610 hfp_connection->establish_audio_connection = 1; 611 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 612 return 1; 613 614 case HFP_CMD_AG_SEND_COMMON_CODEC: 615 hfp_connection->codecs_state = HFP_CODECS_AG_SENT_COMMON_CODEC; 616 hfp_connection->suggested_codec = hfp_ag_suggest_codec(hfp_connection); 617 hfp_ag_send_suggest_codec_cmd(hfp_connection->rfcomm_cid, hfp_connection->suggested_codec); 618 return 1; 619 620 case HFP_CMD_HF_CONFIRMED_CODEC: 621 if (hfp_connection->codec_confirmed != hfp_connection->suggested_codec){ 622 hfp_connection->codecs_state = HFP_CODECS_ERROR; 623 hfp_ag_send_error(hfp_connection->rfcomm_cid); 624 return 1; 625 } 626 hfp_connection->negotiated_codec = hfp_connection->codec_confirmed; 627 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 628 log_info("hfp: codec confirmed: %s", (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? "mSBC" : "CVSD"); 629 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 630 // now, pick link settings 631 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 632 #ifdef ENABLE_CC256X_ASSISTED_HFP 633 hfp_cc256x_prepare_for_sco(hfp_connection); 634 #endif 635 return 1; 636 default: 637 break; 638 } 639 return 0; 640 } 641 642 static void hfp_ag_slc_established(hfp_connection_t * hfp_connection){ 643 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 644 hfp_emit_slc_connection_event(hfp_connection, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 645 646 // if active call exist, set per-hfp_connection state active, too (when audio is on) 647 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 648 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 649 } 650 // if AG is ringing, also start ringing on the HF 651 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 652 switch (hfp_gsm_callsetup_status()){ 653 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 654 hfp_ag_hf_start_ringing_incoming(hfp_connection); 655 break; 656 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 657 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 658 break; 659 default: 660 break; 661 } 662 } 663 } 664 665 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 666 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 667 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 668 int sent = 0; 669 switch(hfp_connection->command){ 670 case HFP_CMD_SUPPORTED_FEATURES: 671 switch(hfp_connection->state){ 672 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 673 case HFP_EXCHANGE_SUPPORTED_FEATURES: 674 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 675 if (has_codec_negotiation_feature(hfp_connection)){ 676 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 677 } else { 678 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 679 } 680 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 681 return 1; 682 default: 683 break; 684 } 685 break; 686 case HFP_CMD_AVAILABLE_CODECS: 687 sent = codecs_exchange_state_machine(hfp_connection); 688 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 689 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 690 } 691 return sent; 692 693 case HFP_CMD_RETRIEVE_AG_INDICATORS: 694 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 695 // HF requested AG Indicators and we did expect it 696 hfp_connection->send_ag_indicators_segment = 0; 697 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 698 // continue below in state switch 699 } 700 break; 701 702 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 703 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 704 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 705 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 706 return 1; 707 708 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 709 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 710 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 711 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 712 } else if (has_hf_indicators_feature(hfp_connection)){ 713 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 714 } else { 715 hfp_ag_slc_established(hfp_connection); 716 } 717 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 718 return 1; 719 720 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 721 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 722 if (has_hf_indicators_feature(hfp_connection)){ 723 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 724 } 725 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 726 if (!has_hf_indicators_feature(hfp_connection)){ 727 hfp_ag_slc_established(hfp_connection); 728 } 729 return 1; 730 731 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 732 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 733 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 734 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 735 return 1; 736 737 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 738 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 739 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 740 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 741 return 1; 742 743 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 744 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 745 hfp_ag_slc_established(hfp_connection); 746 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 747 return 1; 748 default: 749 break; 750 } 751 752 switch (hfp_connection->state){ 753 case HFP_RETRIEVE_INDICATORS: { 754 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 755 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 756 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 757 if (next_segment < num_segments){ 758 // prepare sending of next segment 759 hfp_connection->send_ag_indicators_segment = next_segment; 760 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 761 } else { 762 // done, go to next state 763 hfp_connection->send_ag_indicators_segment = 0; 764 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 765 } 766 return 1; 767 } 768 default: 769 break; 770 } 771 return 0; 772 } 773 774 static bool hfp_ag_voice_recognition_supported(hfp_connection_t * hfp_connection, bool enhanced){ 775 uint8_t ag_vra_flag = HFP_AGSF_VOICE_RECOGNITION_FUNCTION; 776 uint8_t hf_vra_flag = HFP_HFSF_VOICE_RECOGNITION_FUNCTION; 777 778 if (enhanced){ 779 ag_vra_flag = HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS; 780 hf_vra_flag = HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS; 781 } 782 783 int ag = get_bit(hfp_ag_supported_features, ag_vra_flag); 784 int hf = get_bit(hfp_connection->remote_supported_features, hf_vra_flag); 785 return hf && ag; 786 } 787 788 static uint8_t hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection, bool enhanced){ 789 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 790 return ERROR_CODE_COMMAND_DISALLOWED; 791 } 792 if (!hfp_ag_voice_recognition_supported(hfp_connection, enhanced)){ 793 return ERROR_CODE_COMMAND_DISALLOWED; 794 } 795 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 796 return ERROR_CODE_COMMAND_DISALLOWED; 797 } 798 return ERROR_CODE_SUCCESS; 799 } 800 801 static uint8_t hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection, bool enhanced){ 802 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 803 return ERROR_CODE_COMMAND_DISALLOWED; 804 } 805 if (!hfp_ag_voice_recognition_supported(hfp_connection, enhanced)){ 806 return ERROR_CODE_COMMAND_DISALLOWED; 807 } 808 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 809 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 810 return ERROR_CODE_SUCCESS; 811 } 812 return ERROR_CODE_COMMAND_DISALLOWED; 813 } 814 return ERROR_CODE_SUCCESS; 815 } 816 817 static bool hfp_ag_can_send_enahnced_voice_recognition_message(hfp_connection_t * hfp_connection, bool enhanced){ 818 if (hfp_ag_voice_recognition_session_active(hfp_connection, enhanced) == ERROR_CODE_SUCCESS){ 819 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 820 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 821 return hf && ag; 822 } 823 return false; 824 } 825 826 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 827 switch (hfp_connection->state){ 828 case HFP_W2_CONNECT_SCO: 829 case HFP_W4_SCO_CONNECTED: 830 case HFP_AUDIO_CONNECTION_ESTABLISHED: 831 return true; 832 default: 833 return false; 834 } 835 } 836 837 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 838 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 839 840 uint8_t event[6]; 841 event[0] = HCI_EVENT_HFP_META; 842 event[1] = sizeof(event) - 2; 843 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 844 little_endian_store_16(event, 3, acl_handle); 845 event[5] = status; 846 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 847 } 848 849 850 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 851 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 852 853 uint8_t event[8]; 854 event[0] = HCI_EVENT_HFP_META; 855 event[1] = sizeof(event) - 2; 856 event[2] = HFP_SUBEVENT_HF_INDICATOR; 857 little_endian_store_16(event, 3, acl_handle); 858 little_endian_store_16(event, 5, uuid); 859 event[7] = value; 860 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 861 } 862 863 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 864 if (!hfp_ag_callback) return; 865 866 uint8_t event[5]; 867 event[0] = HCI_EVENT_HFP_META; 868 event[1] = sizeof(event) - 2; 869 event[2] = event_subtype; 870 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 871 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 872 } 873 874 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 875 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 876 return 0; 877 } 878 int done = 0; 879 uint8_t status; 880 881 switch (hfp_connection->command){ 882 case HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION: 883 switch (hfp_connection->vra_state_requested){ 884 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 885 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 886 if (done == 0){ 887 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 888 } else { 889 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 890 } 891 hfp_connection->vra_state_requested = hfp_connection->vra_state; 892 return done; 893 894 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 895 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 896 if (done == 0){ 897 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 898 } else { 899 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 900 } 901 hfp_connection->vra_state_requested = hfp_connection->vra_state; 902 return done; 903 904 default: 905 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 906 if (done == 0){ 907 hfp_connection->vra_state_requested = hfp_connection->vra_state; 908 hfp_emit_voice_recognition_state_event(hfp_connection, ERROR_CODE_COMMAND_DISALLOWED); 909 return 0; 910 } 911 break; 912 } 913 break; 914 915 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 916 // HF initiatied voice recognition, parser extracted activation value 917 switch (hfp_connection->ag_activate_voice_recognition_value){ 918 case 0: 919 if (hfp_ag_voice_recognition_session_active(hfp_connection, hfp_connection->enhanced_voice_recognition_enabled) == ERROR_CODE_SUCCESS){ 920 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 921 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 922 } 923 break; 924 925 case 1: 926 if (hfp_ag_can_activate_voice_recognition(hfp_connection, hfp_connection->enhanced_voice_recognition_enabled) == ERROR_CODE_SUCCESS){ 927 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 928 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 929 } 930 break; 931 932 case 2: 933 if (hfp_ag_voice_recognition_session_active(hfp_connection, hfp_connection->enhanced_voice_recognition_enabled) == ERROR_CODE_SUCCESS){ 934 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 935 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 936 } 937 break; 938 default: 939 break; 940 } 941 if (done == 0){ 942 hfp_connection->vra_state_requested = hfp_connection->vra_state; 943 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 944 return 1; 945 } 946 break; 947 948 default: 949 return 0; 950 } 951 952 switch (hfp_connection->vra_state_requested){ 953 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 954 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 955 status = hfp_ag_setup_audio_connection(hfp_connection); 956 if (status != ERROR_CODE_SUCCESS){ 957 hfp_connection->vra_state_requested = hfp_connection->vra_state; 958 hfp_emit_voice_recognition_state_event(hfp_connection, status); 959 return 0; 960 } 961 } 962 hfp_connection->enhanced_voice_recognition_enabled = true; 963 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 964 hfp_connection->vra_state_requested = hfp_connection->vra_state; 965 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 966 break; 967 968 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 969 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 970 hfp_connection->vra_state_requested = hfp_connection->vra_state; 971 972 // release audio connection only if it was opened after audio VR activated 973 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 974 hfp_trigger_release_audio_connection(hfp_connection); 975 } 976 977 hfp_emit_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 978 break; 979 980 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 981 // open only if audio connection does not already exist 982 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 983 status = hfp_ag_setup_audio_connection(hfp_connection); 984 if (status != ERROR_CODE_SUCCESS){ 985 hfp_connection->vra_state_requested = hfp_connection->vra_state; 986 hfp_emit_voice_recognition_state_event(hfp_connection, status); 987 return 0; 988 } 989 } 990 991 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 992 hfp_connection->vra_state_requested = hfp_connection->vra_state; 993 hfp_emit_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 994 break; 995 996 default: 997 break; 998 } 999 return done; 1000 } 1001 1002 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1003 int sent = codecs_exchange_state_machine(hfp_connection); 1004 if (sent) return 1; 1005 1006 switch(hfp_connection->command){ 1007 1008 case HFP_CMD_CHANGE_IN_BAND_RING_TONE_SETTING: 1009 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1010 return 1; 1011 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1012 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1013 return 1; 1014 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1015 if (hfp_connection->network_operator.format != 0){ 1016 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1017 } else { 1018 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1019 } 1020 return 1; 1021 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1022 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1023 return 1; 1024 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1025 if (hfp_connection->extended_audio_gateway_error){ 1026 hfp_connection->extended_audio_gateway_error = 0; 1027 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1028 return 1; 1029 } 1030 break; 1031 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1032 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1033 return 1; 1034 default: 1035 break; 1036 } 1037 return 0; 1038 } 1039 1040 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1041 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1042 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1043 1044 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1045 1046 if (hfp_connection->release_audio_connection){ 1047 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1048 hfp_connection->release_audio_connection = 0; 1049 gap_disconnect(hfp_connection->sco_handle); 1050 return 1; 1051 } 1052 1053 // accept incoming audio connection (codec negotiation is not used) 1054 if (hfp_connection->accept_sco){ 1055 // notify about codec selection if not done already 1056 if (hfp_connection->negotiated_codec == 0){ 1057 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1058 } 1059 // 1060 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1061 hfp_connection->accept_sco = 0; 1062 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1063 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1064 return 1; 1065 } 1066 1067 // run codecs exchange 1068 int sent = codecs_exchange_state_machine(hfp_connection); 1069 if (sent) return 1; 1070 1071 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1072 if (hfp_connection->establish_audio_connection){ 1073 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1074 hfp_connection->establish_audio_connection = 0; 1075 hfp_setup_synchronous_connection(hfp_connection); 1076 return 1; 1077 } 1078 return 0; 1079 } 1080 1081 static void hfp_ag_set_callsetup_indicator(void){ 1082 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1083 if (!indicator){ 1084 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1085 return; 1086 }; 1087 indicator->status = hfp_gsm_callsetup_status(); 1088 } 1089 1090 static void hfp_ag_set_callheld_indicator(void){ 1091 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1092 if (!indicator){ 1093 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1094 return; 1095 }; 1096 indicator->status = hfp_gsm_callheld_status(); 1097 } 1098 1099 // 1100 // transition implementations for hfp_ag_call_state_machine 1101 // 1102 1103 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1104 if (use_in_band_tone()){ 1105 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1106 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1107 } else { 1108 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1109 } 1110 } 1111 1112 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1113 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1114 } 1115 1116 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1117 hfp_connection->ag_ring = 0; 1118 hfp_connection->ag_send_clip = 0; 1119 } 1120 1121 1122 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1123 btstack_linked_list_iterator_t it; 1124 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1125 while (btstack_linked_list_iterator_has_next(&it)){ 1126 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1127 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1128 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1129 1130 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1131 hfp_ag_run_for_context(hfp_connection); 1132 } 1133 } 1134 1135 static void hfp_ag_trigger_ring_and_clip(void) { 1136 btstack_linked_list_iterator_t it; 1137 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1138 while (btstack_linked_list_iterator_has_next(&it)){ 1139 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1140 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1141 switch (hfp_connection->call_state){ 1142 case HFP_CALL_INCOMING_RINGING: 1143 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1144 case HFP_CALL_OUTGOING_RINGING: 1145 // Queue RING on this connection 1146 hfp_connection->ag_ring = 1; 1147 1148 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1149 // "If the calling subscriber number information is available from the network, the AG shall issue the 1150 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1151 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1152 1153 // trigger next message 1154 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1155 break; 1156 default: 1157 break; 1158 } 1159 } 1160 } 1161 1162 // trigger RING and CLIP messages on connections that are ringing 1163 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1164 hfp_ag_trigger_ring_and_clip(); 1165 1166 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1167 btstack_run_loop_add_timer(timer); 1168 } 1169 1170 static void hfp_ag_ring_timeout_stop(void){ 1171 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1172 } 1173 1174 static void hfp_ag_start_ringing(void){ 1175 // setup ring timer 1176 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1177 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1178 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1179 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1180 1181 // emit start ringing 1182 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1183 1184 // send initial RING + CLIP 1185 hfp_ag_trigger_ring_and_clip(); 1186 } 1187 1188 static void hfp_ag_stop_ringing(void){ 1189 hfp_ag_ring_timeout_stop(); 1190 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1191 1192 btstack_linked_list_iterator_t it; 1193 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1194 while (btstack_linked_list_iterator_has_next(&it)){ 1195 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1196 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1197 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1198 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1199 hfp_ag_hf_stop_ringing(hfp_connection); 1200 } 1201 } 1202 1203 static void hfp_ag_trigger_incoming_call_idle(void){ 1204 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1205 if (indicator_index < 0) return; 1206 1207 // update callsetup state in connections 1208 btstack_linked_list_iterator_t it; 1209 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1210 while (btstack_linked_list_iterator_has_next(&it)){ 1211 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1212 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1213 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1214 1215 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1216 1217 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1218 1219 hfp_ag_run_for_context(hfp_connection); 1220 } 1221 1222 // start local ringing - started after connection state has been updated 1223 hfp_ag_start_ringing(); 1224 } 1225 1226 static void hfp_ag_trigger_outgoing_call(void){ 1227 btstack_linked_list_iterator_t it; 1228 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1229 while (btstack_linked_list_iterator_has_next(&it)){ 1230 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1231 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1232 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1233 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1234 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1235 } 1236 } 1237 } 1238 1239 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1240 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1241 1242 // trigger callsetup to be 1243 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1244 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1245 1246 int indicator_index ; 1247 1248 hfp_ag_set_callsetup_indicator(); 1249 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1250 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1251 1252 // put current call on hold if active 1253 if (put_call_on_hold){ 1254 log_info("AG putting current call on hold for new outgoing call"); 1255 hfp_ag_set_callheld_indicator(); 1256 indicator_index = get_ag_indicator_index_for_name("callheld"); 1257 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1258 } 1259 1260 // start audio if needed 1261 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1262 } 1263 1264 static void hfp_ag_transfer_indicator(const char * name){ 1265 int indicator_index = get_ag_indicator_index_for_name(name); 1266 if (indicator_index < 0) return; 1267 1268 btstack_linked_list_iterator_t it; 1269 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1270 while (btstack_linked_list_iterator_has_next(&it)){ 1271 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1272 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1273 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1274 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1275 hfp_ag_run_for_context(hfp_connection); 1276 } 1277 } 1278 1279 static void hfp_ag_transfer_callsetup_state(void){ 1280 hfp_ag_transfer_indicator("callsetup"); 1281 } 1282 1283 static void hfp_ag_transfer_call_state(void){ 1284 hfp_ag_transfer_indicator("call"); 1285 } 1286 1287 static void hfp_ag_transfer_callheld_state(void){ 1288 hfp_ag_transfer_indicator("callheld"); 1289 } 1290 1291 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1292 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1293 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1294 1295 hfp_ag_stop_ringing(); 1296 1297 btstack_linked_list_iterator_t it; 1298 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1299 while (btstack_linked_list_iterator_has_next(&it)){ 1300 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1301 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1302 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1303 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1304 1305 if (hfp_connection == source){ 1306 1307 if (use_in_band_tone()){ 1308 hfp_connection->call_state = HFP_CALL_ACTIVE; 1309 } else { 1310 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1311 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1312 } 1313 1314 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1315 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1316 1317 } else { 1318 hfp_connection->call_state = HFP_CALL_IDLE; 1319 } 1320 hfp_ag_run_for_context(hfp_connection); 1321 } 1322 } 1323 1324 static void hfp_ag_ag_accept_call(void){ 1325 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1326 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1327 1328 hfp_ag_stop_ringing(); 1329 1330 btstack_linked_list_iterator_t it; 1331 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1332 while (btstack_linked_list_iterator_has_next(&it)){ 1333 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1334 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1335 if (hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) continue; 1336 1337 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1338 1339 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1340 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1341 1342 hfp_ag_run_for_context(hfp_connection); 1343 break; // only single 1344 } 1345 } 1346 1347 static void hfp_ag_trigger_reject_call(void){ 1348 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1349 1350 hfp_ag_stop_ringing(); 1351 1352 btstack_linked_list_iterator_t it; 1353 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1354 while (btstack_linked_list_iterator_has_next(&it)){ 1355 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1356 if (connection->local_role != HFP_ROLE_AG) continue; 1357 if ((connection->call_state != HFP_CALL_INCOMING_RINGING) && 1358 (connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1359 1360 connection->call_state = HFP_CALL_IDLE; 1361 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1362 1363 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1364 connection->release_audio_connection = 1; 1365 } 1366 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1367 hfp_ag_run_for_context(connection); 1368 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1369 } 1370 } 1371 1372 static void hfp_ag_trigger_terminate_call(void){ 1373 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1374 1375 // no ringing during call 1376 1377 btstack_linked_list_iterator_t it; 1378 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1379 while (btstack_linked_list_iterator_has_next(&it)){ 1380 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1381 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1382 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1383 1384 hfp_connection->call_state = HFP_CALL_IDLE; 1385 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1386 1387 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1388 hfp_connection->release_audio_connection = 1; 1389 } 1390 1391 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1392 hfp_ag_run_for_context(hfp_connection); 1393 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1394 } 1395 } 1396 1397 static void hfp_ag_set_call_indicator(void){ 1398 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1399 if (!indicator){ 1400 log_error("hfp_ag_set_call_state: call indicator is missing"); 1401 return; 1402 }; 1403 indicator->status = hfp_gsm_call_status(); 1404 } 1405 1406 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1407 btstack_linked_list_iterator_t it; 1408 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1409 while (btstack_linked_list_iterator_has_next(&it)){ 1410 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1411 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1412 if (hfp_connection->call_state == call_state) return hfp_connection; 1413 } 1414 return NULL; 1415 } 1416 1417 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1418 btstack_linked_list_iterator_t it; 1419 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1420 while (btstack_linked_list_iterator_has_next(&it)){ 1421 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1422 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1423 hfp_connection->send_response_and_hold_status = state + 1; 1424 } 1425 } 1426 1427 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1428 int indicator_index; 1429 switch (hfp_connection->call_state){ 1430 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1431 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1432 1433 // we got event: audio hfp_connection established 1434 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1435 break; 1436 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1437 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1438 // we got event: audio hfp_connection established 1439 hfp_connection->call_state = HFP_CALL_ACTIVE; 1440 break; 1441 case HFP_CALL_W2_SEND_CALL_WAITING: 1442 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1443 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1444 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1445 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1446 break; 1447 default: 1448 break; 1449 } 1450 return 0; 1451 } 1452 1453 // functions extracted from hfp_ag_call_sm below 1454 static void hfp_ag_handle_reject_outgoing_call(void){ 1455 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1456 if (!hfp_connection){ 1457 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1458 return; 1459 } 1460 1461 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1462 hfp_connection->call_state = HFP_CALL_IDLE; 1463 hfp_connection->send_error = 1; 1464 hfp_ag_run_for_context(hfp_connection); 1465 } 1466 1467 // hfp_connection is used to identify originating HF 1468 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1469 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1470 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1471 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1472 1473 switch (event){ 1474 case HFP_AG_INCOMING_CALL: 1475 switch (hfp_gsm_call_status()){ 1476 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1477 switch (hfp_gsm_callsetup_status()){ 1478 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1479 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1480 hfp_ag_set_callsetup_indicator(); 1481 hfp_ag_trigger_incoming_call_idle(); 1482 log_info("AG rings"); 1483 break; 1484 default: 1485 break; 1486 } 1487 break; 1488 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1489 switch (hfp_gsm_callsetup_status()){ 1490 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1491 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1492 hfp_ag_set_callsetup_indicator(); 1493 hfp_ag_trigger_incoming_call_during_active_one(); 1494 log_info("AG call waiting"); 1495 break; 1496 default: 1497 break; 1498 } 1499 break; 1500 default: 1501 break; 1502 } 1503 break; 1504 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1505 switch (hfp_gsm_call_status()){ 1506 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1507 switch (hfp_gsm_callsetup_status()){ 1508 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1509 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1510 hfp_ag_set_call_indicator(); 1511 hfp_ag_set_callsetup_indicator(); 1512 hfp_ag_ag_accept_call(); 1513 log_info("AG answers call, accept call by GSM"); 1514 break; 1515 default: 1516 break; 1517 } 1518 break; 1519 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1520 switch (hfp_gsm_callsetup_status()){ 1521 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1522 log_info("AG: current call is placed on hold, incoming call gets active"); 1523 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1524 hfp_ag_set_callsetup_indicator(); 1525 hfp_ag_set_callheld_indicator(); 1526 hfp_ag_transfer_callsetup_state(); 1527 hfp_ag_transfer_callheld_state(); 1528 break; 1529 default: 1530 break; 1531 } 1532 break; 1533 default: 1534 break; 1535 } 1536 break; 1537 1538 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1539 switch (hfp_gsm_call_status()){ 1540 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1541 switch (hfp_gsm_callheld_status()){ 1542 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1543 log_info("AG: joining held call with active call"); 1544 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1545 hfp_ag_set_callheld_indicator(); 1546 hfp_ag_transfer_callheld_state(); 1547 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1548 break; 1549 default: 1550 break; 1551 } 1552 break; 1553 default: 1554 break; 1555 } 1556 break; 1557 1558 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1559 switch (hfp_gsm_call_status()){ 1560 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1561 switch (hfp_gsm_callsetup_status()){ 1562 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1563 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1564 hfp_ag_set_callsetup_indicator(); 1565 hfp_ag_set_call_indicator(); 1566 hfp_ag_hf_accept_call(hfp_connection); 1567 hfp_connection->ok_pending = 1; 1568 log_info("HF answers call, accept call by GSM"); 1569 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1570 break; 1571 default: 1572 break; 1573 } 1574 break; 1575 default: 1576 break; 1577 } 1578 break; 1579 1580 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1581 switch (hfp_gsm_call_status()){ 1582 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1583 switch (hfp_gsm_callsetup_status()){ 1584 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1585 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1586 hfp_ag_response_and_hold_active = 1; 1587 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1588 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1589 // as with regular call 1590 hfp_ag_set_call_indicator(); 1591 hfp_ag_set_callsetup_indicator(); 1592 hfp_ag_ag_accept_call(); 1593 log_info("AG response and hold - hold by AG"); 1594 break; 1595 default: 1596 break; 1597 } 1598 break; 1599 default: 1600 break; 1601 } 1602 break; 1603 1604 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1605 switch (hfp_gsm_call_status()){ 1606 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1607 switch (hfp_gsm_callsetup_status()){ 1608 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1609 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1610 hfp_ag_response_and_hold_active = 1; 1611 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1612 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1613 // as with regular call 1614 hfp_ag_set_call_indicator(); 1615 hfp_ag_set_callsetup_indicator(); 1616 hfp_ag_hf_accept_call(hfp_connection); 1617 log_info("AG response and hold - hold by HF"); 1618 break; 1619 default: 1620 break; 1621 } 1622 break; 1623 default: 1624 break; 1625 } 1626 break; 1627 1628 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1629 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1630 if (!hfp_ag_response_and_hold_active) break; 1631 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1632 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1633 hfp_ag_response_and_hold_active = 0; 1634 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1635 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1636 log_info("Held Call accepted and active"); 1637 break; 1638 1639 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1640 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1641 if (!hfp_ag_response_and_hold_active) break; 1642 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1643 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1644 hfp_ag_response_and_hold_active = 0; 1645 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1646 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1647 // from terminate by ag 1648 hfp_ag_set_call_indicator(); 1649 hfp_ag_trigger_terminate_call(); 1650 break; 1651 1652 case HFP_AG_TERMINATE_CALL_BY_HF: 1653 switch (hfp_gsm_call_status()){ 1654 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1655 switch (hfp_gsm_callsetup_status()){ 1656 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1657 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1658 hfp_ag_set_callsetup_indicator(); 1659 hfp_ag_transfer_callsetup_state(); 1660 hfp_ag_trigger_reject_call(); 1661 log_info("HF Rejected Incoming call, AG terminate call"); 1662 break; 1663 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1664 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1665 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1666 hfp_ag_set_callsetup_indicator(); 1667 hfp_ag_transfer_callsetup_state(); 1668 log_info("AG terminate outgoing call process"); 1669 break; 1670 default: 1671 break; 1672 } 1673 break; 1674 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1675 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1676 hfp_ag_set_callsetup_indicator(); 1677 hfp_ag_set_call_indicator(); 1678 hfp_ag_trigger_terminate_call(); 1679 log_info("AG terminate call"); 1680 break; 1681 default: 1682 break; 1683 } 1684 break; 1685 1686 case HFP_AG_TERMINATE_CALL_BY_AG: 1687 switch (hfp_gsm_call_status()){ 1688 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1689 switch (hfp_gsm_callsetup_status()){ 1690 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1691 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1692 hfp_ag_set_callsetup_indicator(); 1693 hfp_ag_trigger_reject_call(); 1694 log_info("AG Rejected Incoming call, AG terminate call"); 1695 break; 1696 default: 1697 break; 1698 } 1699 break; 1700 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1701 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1702 hfp_ag_set_callsetup_indicator(); 1703 hfp_ag_set_call_indicator(); 1704 hfp_ag_trigger_terminate_call(); 1705 log_info("AG terminate call"); 1706 break; 1707 default: 1708 break; 1709 } 1710 break; 1711 case HFP_AG_CALL_DROPPED: 1712 switch (hfp_gsm_call_status()){ 1713 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1714 switch (hfp_gsm_callsetup_status()){ 1715 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1716 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1717 hfp_ag_stop_ringing(); 1718 break; 1719 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1720 log_info("Outgoing call interrupted\n"); 1721 break; 1722 default: 1723 break; 1724 } 1725 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1726 hfp_ag_set_callsetup_indicator(); 1727 hfp_ag_transfer_callsetup_state(); 1728 hfp_ag_trigger_terminate_call(); 1729 break; 1730 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1731 if (hfp_ag_response_and_hold_active) { 1732 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1733 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1734 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1735 } 1736 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1737 hfp_ag_set_callsetup_indicator(); 1738 hfp_ag_set_call_indicator(); 1739 hfp_ag_trigger_terminate_call(); 1740 log_info("AG notify call dropped"); 1741 break; 1742 default: 1743 break; 1744 } 1745 break; 1746 1747 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1748 // directly reject call if number of free slots is exceeded 1749 if (!hfp_gsm_call_possible()){ 1750 hfp_connection->send_error = 1; 1751 hfp_ag_run_for_context(hfp_connection); 1752 break; 1753 } 1754 1755 // note: number not used currently 1756 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1757 1758 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1759 1760 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1761 break; 1762 1763 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1764 // directly reject call if number of free slots is exceeded 1765 if (!hfp_gsm_call_possible()) { 1766 // TODO: no error for user 1767 break; 1768 } 1769 switch (hfp_gsm_call_status()) { 1770 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1771 switch (hfp_gsm_callsetup_status()) { 1772 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1773 // note: number not used currently 1774 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1775 // init call state for all connections 1776 hfp_ag_trigger_outgoing_call(); 1777 // get first one and accept call 1778 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1779 if (hfp_connection) { 1780 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1781 } 1782 break; 1783 default: 1784 // TODO: no error for user 1785 break; 1786 } 1787 break; 1788 default: 1789 // TODO: no error for user 1790 break; 1791 } 1792 break; 1793 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1794 // directly reject call if number of free slots is exceeded 1795 if (!hfp_gsm_call_possible()){ 1796 hfp_connection->send_error = 1; 1797 hfp_ag_run_for_context(hfp_connection); 1798 break; 1799 } 1800 1801 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1802 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1803 1804 log_info("Redial last number"); 1805 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1806 1807 if (strlen(last_dialed_number) > 0){ 1808 log_info("Last number exists: accept call"); 1809 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1810 } else { 1811 log_info("log_infoLast number missing: reject call"); 1812 hfp_ag_handle_reject_outgoing_call(); 1813 } 1814 break; 1815 } 1816 case HFP_AG_OUTGOING_CALL_REJECTED: 1817 hfp_ag_handle_reject_outgoing_call(); 1818 break; 1819 1820 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1821 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1822 if (!hfp_connection){ 1823 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1824 break; 1825 } 1826 1827 hfp_connection->ok_pending = 1; 1828 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1829 break; 1830 } 1831 case HFP_AG_OUTGOING_CALL_RINGING: 1832 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1833 if (!hfp_connection){ 1834 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1835 break; 1836 } 1837 1838 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1839 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1840 hfp_ag_set_callsetup_indicator(); 1841 hfp_ag_transfer_callsetup_state(); 1842 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1843 break; 1844 1845 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1846 // get outgoing call 1847 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1848 if (!hfp_connection){ 1849 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1850 } 1851 if (!hfp_connection){ 1852 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1853 break; 1854 } 1855 1856 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1857 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1858 hfp_connection->call_state = HFP_CALL_ACTIVE; 1859 hfp_ag_set_callsetup_indicator(); 1860 hfp_ag_set_call_indicator(); 1861 hfp_ag_transfer_call_state(); 1862 hfp_ag_transfer_callsetup_state(); 1863 if (callheld_status_call_on_hold_and_no_active_calls){ 1864 hfp_ag_set_callheld_indicator(); 1865 hfp_ag_transfer_callheld_state(); 1866 } 1867 hfp_ag_hf_stop_ringing(hfp_connection); 1868 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1869 break; 1870 } 1871 1872 case HFP_AG_CALL_HOLD_USER_BUSY: 1873 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1874 hfp_ag_set_callsetup_indicator(); 1875 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1876 hfp_connection->call_state = HFP_CALL_ACTIVE; 1877 log_info("AG: Call Waiting, User Busy"); 1878 break; 1879 1880 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1881 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1882 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1883 1884 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1885 if (call_held || call_setup_in_progress){ 1886 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1887 0, NULL); 1888 1889 } 1890 1891 if (call_setup_in_progress){ 1892 log_info("AG: Call Dropped, Accept new call"); 1893 hfp_ag_set_callsetup_indicator(); 1894 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1895 } else { 1896 log_info("AG: Call Dropped, Resume held call"); 1897 } 1898 if (call_held){ 1899 hfp_ag_set_callheld_indicator(); 1900 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1901 } 1902 1903 hfp_connection->call_state = HFP_CALL_ACTIVE; 1904 break; 1905 } 1906 1907 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1908 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1909 // only update if callsetup changed 1910 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1911 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1912 NULL); 1913 1914 if (call_setup_in_progress){ 1915 log_info("AG: Call on Hold, Accept new call"); 1916 hfp_ag_set_callsetup_indicator(); 1917 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1918 } else { 1919 log_info("AG: Swap calls"); 1920 } 1921 1922 hfp_ag_set_callheld_indicator(); 1923 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1924 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1925 hfp_connection->call_state = HFP_CALL_ACTIVE; 1926 break; 1927 } 1928 1929 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1930 // Adds a held call to the conversation. 1931 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1932 log_info("AG: Join 3-way-call"); 1933 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1934 hfp_ag_set_callheld_indicator(); 1935 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1936 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1937 } 1938 hfp_connection->call_state = HFP_CALL_ACTIVE; 1939 break; 1940 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1941 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1942 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1943 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1944 hfp_ag_set_call_indicator(); 1945 hfp_ag_set_callheld_indicator(); 1946 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1947 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1948 hfp_connection->call_state = HFP_CALL_IDLE; 1949 break; 1950 1951 default: 1952 break; 1953 } 1954 1955 1956 } 1957 1958 1959 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 1960 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 1961 if (!active_call) return; 1962 1963 int idx = active_call->index; 1964 hfp_enhanced_call_dir_t dir = active_call->direction; 1965 hfp_enhanced_call_status_t status = active_call->enhanced_status; 1966 hfp_enhanced_call_mode_t mode = active_call->mode; 1967 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 1968 uint8_t type = active_call->clip_type; 1969 char * number = active_call->clip_number; 1970 1971 char buffer[100]; 1972 // TODO: check length of a buffer, to fit the MTU 1973 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 1974 if (number){ 1975 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 1976 } 1977 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 1978 log_info("hfp_ag_send_current_call_status 000 index %d, dir %d, status %d, mode %d, mpty %d, type %d, number %s", idx, dir, status, 1979 mode, mpty, type, number); 1980 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 1981 } 1982 1983 // sends pending command, returns if command was sent 1984 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 1985 if (hfp_connection->send_status_of_current_calls){ 1986 hfp_connection->ok_pending = 0; 1987 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 1988 hfp_connection->next_call_index++; 1989 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 1990 return 1; 1991 } else { 1992 // TODO: this code should be removed. check a) before setting send_status_of_current_calls, or b) right before hfp_ag_send_call_status above 1993 hfp_connection->next_call_index = 0; 1994 hfp_connection->ok_pending = 1; 1995 hfp_connection->send_status_of_current_calls = 0; 1996 } 1997 } 1998 1999 if (hfp_connection->ag_notify_incoming_call_waiting){ 2000 hfp_connection->ag_notify_incoming_call_waiting = 0; 2001 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2002 return 1; 2003 } 2004 2005 if (hfp_connection->command == HFP_CMD_UNKNOWN){ 2006 hfp_connection->ok_pending = 0; 2007 hfp_connection->send_error = 0; 2008 hfp_connection->command = HFP_CMD_NONE; 2009 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2010 return 1; 2011 } 2012 2013 if (hfp_connection->send_error){ 2014 hfp_connection->send_error = 0; 2015 hfp_connection->command = HFP_CMD_NONE; 2016 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2017 return 1; 2018 } 2019 2020 // note: before update AG indicators and ok_pending 2021 if (hfp_connection->send_response_and_hold_status){ 2022 int status = hfp_connection->send_response_and_hold_status - 1; 2023 hfp_connection->send_response_and_hold_status = 0; 2024 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2025 return 1; 2026 } 2027 2028 if (hfp_connection->ok_pending){ 2029 hfp_connection->ok_pending = 0; 2030 hfp_connection->command = HFP_CMD_NONE; 2031 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2032 return 1; 2033 } 2034 2035 // update AG indicators 2036 if (hfp_connection->ag_indicators_status_update_bitmap){ 2037 int i; 2038 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2039 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2040 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2041 if (!hfp_connection->enable_status_update_for_ag_indicators) { 2042 log_info("+CMER:3,0,0,0 - not sending update for '%s'", hfp_ag_indicators[i].name); 2043 break; 2044 } 2045 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2046 return 1; 2047 } 2048 } 2049 } 2050 2051 if (hfp_connection->ag_send_no_carrier){ 2052 hfp_connection->ag_send_no_carrier = false; 2053 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2054 return 1; 2055 } 2056 2057 if (hfp_connection->ag_ring){ 2058 hfp_connection->ag_ring = 0; 2059 hfp_connection->command = HFP_CMD_NONE; 2060 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2061 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2062 return 1; 2063 } 2064 2065 if (hfp_connection->ag_send_clip){ 2066 hfp_connection->ag_send_clip = 0; 2067 hfp_connection->command = HFP_CMD_NONE; 2068 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2069 return 1; 2070 } 2071 2072 if (hfp_connection->send_phone_number_for_voice_tag){ 2073 hfp_connection->send_phone_number_for_voice_tag = 0; 2074 hfp_connection->command = HFP_CMD_NONE; 2075 hfp_connection->ok_pending = 1; 2076 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2077 return 1; 2078 } 2079 2080 if (hfp_connection->send_subscriber_number){ 2081 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2082 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2083 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2084 } else { 2085 hfp_connection->send_subscriber_number = 0; 2086 hfp_connection->next_subscriber_number_to_send = 0; 2087 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2088 } 2089 hfp_connection->command = HFP_CMD_NONE; 2090 return 1; 2091 } 2092 2093 if (hfp_connection->send_microphone_gain){ 2094 hfp_connection->send_microphone_gain = 0; 2095 hfp_connection->command = HFP_CMD_NONE; 2096 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2097 return 1; 2098 } 2099 2100 if (hfp_connection->send_speaker_gain){ 2101 hfp_connection->send_speaker_gain = 0; 2102 hfp_connection->command = HFP_CMD_NONE; 2103 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2104 return 1; 2105 } 2106 2107 if (hfp_connection->send_ag_status_indicators){ 2108 hfp_connection->send_ag_status_indicators = 0; 2109 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2110 return 1; 2111 } 2112 2113 return 0; 2114 } 2115 2116 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2117 2118 btstack_assert(hfp_connection != NULL); 2119 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2120 2121 // during SDP query, RFCOMM CID is not set 2122 if (hfp_connection->rfcomm_cid == 0) return; 2123 2124 // assert command could be sent 2125 if (hci_can_send_command_packet_now() == 0) return; 2126 2127 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2128 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2129 hfp_connection->release_audio_connection = 0; 2130 gap_disconnect(hfp_connection->sco_handle); 2131 return; 2132 } 2133 2134 #ifdef ENABLE_CC256X_ASSISTED_HFP 2135 // WBS Disassociate 2136 if (hfp_connection->cc256x_send_wbs_disassociate){ 2137 hfp_connection->cc256x_send_wbs_disassociate = false; 2138 hci_send_cmd(&hci_ti_wbs_disassociate); 2139 return; 2140 } 2141 // Write Codec Config 2142 if (hfp_connection->cc256x_send_write_codec_config){ 2143 hfp_connection->cc256x_send_write_codec_config = false; 2144 hfp_cc256x_write_codec_config(hfp_connection); 2145 return; 2146 } 2147 // WBS Associate 2148 if (hfp_connection->cc256x_send_wbs_associate){ 2149 hfp_connection->cc256x_send_wbs_associate = false; 2150 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2151 return; 2152 } 2153 #endif 2154 #ifdef ENABLE_BCM_PCM_WBS 2155 // Enable WBS 2156 if (hfp_connection->bcm_send_enable_wbs){ 2157 hfp_connection->bcm_send_enable_wbs = false; 2158 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2159 return; 2160 } 2161 // Write I2S/PCM params 2162 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2163 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2164 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2165 return; 2166 } 2167 // Disable WBS 2168 if (hfp_connection->bcm_send_disable_wbs){ 2169 hfp_connection->bcm_send_disable_wbs = false; 2170 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2171 return; 2172 } 2173 #endif 2174 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2175 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2176 hfp_finalize_connection_context(hfp_connection); 2177 return; 2178 } 2179 #endif 2180 2181 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2182 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2183 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2184 return; 2185 } 2186 2187 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2188 2189 if (!cmd_sent){ 2190 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2191 } 2192 2193 if (!cmd_sent){ 2194 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2195 } 2196 2197 if (!cmd_sent){ 2198 cmd_sent = call_setup_state_machine(hfp_connection); 2199 } 2200 2201 // trigger codec exchange (must be before hfp_ag_run_for_audio_connection) 2202 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && hfp_connection->trigger_codec_exchange){ 2203 switch (hfp_connection->codecs_state){ 2204 case HFP_CODECS_IDLE: 2205 case HFP_CODECS_RECEIVED_LIST: 2206 case HFP_CODECS_AG_RESEND_COMMON_CODEC: 2207 case HFP_CODECS_ERROR: 2208 hfp_connection->trigger_codec_exchange = 0; 2209 hfp_connection->command = HFP_CMD_AG_SEND_COMMON_CODEC; 2210 break; 2211 default: 2212 break; 2213 } 2214 } 2215 2216 if (!cmd_sent){ 2217 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2218 } 2219 2220 if (!cmd_sent){ 2221 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2222 } 2223 2224 // disconnect 2225 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2226 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2227 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2228 } 2229 2230 if (cmd_sent){ 2231 hfp_connection->command = HFP_CMD_NONE; 2232 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2233 } 2234 } 2235 2236 static int hfp_parser_is_end_of_line(uint8_t byte){ 2237 return (byte == '\n') || (byte == '\r'); 2238 } 2239 2240 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2241 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2242 if (size < 1) return; 2243 uint8_t status = ERROR_CODE_SUCCESS; 2244 2245 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2246 #ifdef ENABLE_HFP_AT_MESSAGES 2247 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2248 #endif 2249 2250 // process messages byte-wise 2251 int pos; 2252 for (pos = 0; pos < size ; pos++){ 2253 hfp_parse(hfp_connection, packet[pos], 0); 2254 2255 // parse until end of line 2256 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2257 2258 hfp_generic_status_indicator_t * indicator; 2259 switch(hfp_connection->command){ 2260 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2261 // dealt with in hfp_ag_voice_recognition_state_machine 2262 break; 2263 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2264 if (hfp_ag_response_and_hold_active){ 2265 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2266 } 2267 hfp_connection->ok_pending = 1; 2268 break; 2269 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2270 switch(hfp_connection->ag_response_and_hold_action){ 2271 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2272 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2273 break; 2274 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2275 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2276 break; 2277 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2278 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2279 break; 2280 default: 2281 break; 2282 } 2283 hfp_connection->ok_pending = 1; 2284 break; 2285 case HFP_CMD_HF_INDICATOR_STATUS: 2286 hfp_connection->command = HFP_CMD_NONE; 2287 2288 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2289 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2290 switch (indicator->uuid){ 2291 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2292 if (hfp_connection->parser_indicator_value > 1) { 2293 hfp_connection->send_error = 1; 2294 break; 2295 } 2296 hfp_connection->ok_pending = 1; 2297 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2298 break; 2299 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2300 if (hfp_connection->parser_indicator_value > 100){ 2301 hfp_connection->send_error = 1; 2302 break; 2303 } 2304 hfp_connection->ok_pending = 1; 2305 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2306 break; 2307 default: 2308 hfp_connection->send_error = 1; 2309 break; 2310 } 2311 } else { 2312 hfp_connection->send_error = 1; 2313 } 2314 break; 2315 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2316 // expected by SLC state machine 2317 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2318 hfp_connection->send_ag_indicators_segment = 0; 2319 hfp_connection->send_ag_status_indicators = 1; 2320 break; 2321 case HFP_CMD_LIST_CURRENT_CALLS: 2322 hfp_connection->command = HFP_CMD_NONE; 2323 hfp_connection->next_call_index = 0; 2324 hfp_connection->send_status_of_current_calls = 1; 2325 break; 2326 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2327 if (hfp_ag_subscriber_numbers_count == 0){ 2328 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2329 break; 2330 } 2331 hfp_connection->next_subscriber_number_to_send = 0; 2332 hfp_connection->send_subscriber_number = 1; 2333 break; 2334 case HFP_CMD_TRANSMIT_DTMF_CODES: 2335 { 2336 hfp_connection->command = HFP_CMD_NONE; 2337 char buffer[2]; 2338 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2339 buffer[1] = 0; 2340 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2341 break; 2342 } 2343 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2344 hfp_connection->command = HFP_CMD_NONE; 2345 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2346 break; 2347 case HFP_CMD_TURN_OFF_EC_AND_NR: 2348 hfp_connection->command = HFP_CMD_NONE; 2349 2350 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2351 hfp_connection->ok_pending = 1; 2352 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2353 status = ERROR_CODE_SUCCESS; 2354 } else { 2355 hfp_connection->send_error = 1; 2356 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2357 } 2358 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2359 break; 2360 case HFP_CMD_CALL_ANSWERED: 2361 hfp_connection->command = HFP_CMD_NONE; 2362 log_info("HFP: ATA"); 2363 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2364 break; 2365 case HFP_CMD_HANG_UP_CALL: 2366 hfp_connection->command = HFP_CMD_NONE; 2367 hfp_connection->ok_pending = 1; 2368 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2369 break; 2370 case HFP_CMD_CALL_HOLD: { 2371 hfp_connection->command = HFP_CMD_NONE; 2372 hfp_connection->ok_pending = 1; 2373 2374 switch (hfp_connection->ag_call_hold_action){ 2375 case 0: 2376 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2377 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2378 break; 2379 case 1: 2380 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2381 // Where both a held and a waiting call exist, the above procedures shall apply to the 2382 // waiting call (i.e., not to the held call) in conflicting situation. 2383 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2384 break; 2385 case 2: 2386 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2387 // Where both a held and a waiting call exist, the above procedures shall apply to the 2388 // waiting call (i.e., not to the held call) in conflicting situation. 2389 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2390 break; 2391 case 3: 2392 // Adds a held call to the conversation. 2393 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2394 break; 2395 case 4: 2396 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2397 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2398 break; 2399 default: 2400 break; 2401 } 2402 hfp_connection->call_index = 0; 2403 break; 2404 } 2405 case HFP_CMD_CALL_PHONE_NUMBER: 2406 hfp_connection->command = HFP_CMD_NONE; 2407 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2408 break; 2409 case HFP_CMD_REDIAL_LAST_NUMBER: 2410 hfp_connection->command = HFP_CMD_NONE; 2411 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2412 break; 2413 case HFP_CMD_ENABLE_CLIP: 2414 hfp_connection->command = HFP_CMD_NONE; 2415 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2416 hfp_connection->ok_pending = 1; 2417 break; 2418 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2419 hfp_connection->command = HFP_CMD_NONE; 2420 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2421 hfp_connection->ok_pending = 1; 2422 break; 2423 case HFP_CMD_SET_SPEAKER_GAIN: 2424 hfp_connection->command = HFP_CMD_NONE; 2425 hfp_connection->ok_pending = 1; 2426 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2427 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2428 break; 2429 case HFP_CMD_SET_MICROPHONE_GAIN: 2430 hfp_connection->command = HFP_CMD_NONE; 2431 hfp_connection->ok_pending = 1; 2432 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2433 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2434 break; 2435 default: 2436 break; 2437 } 2438 } 2439 } 2440 2441 static void hfp_ag_run(void){ 2442 btstack_linked_list_iterator_t it; 2443 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2444 while (btstack_linked_list_iterator_has_next(&it)){ 2445 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2446 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2447 hfp_ag_run_for_context(hfp_connection); 2448 } 2449 } 2450 2451 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2452 hfp_connection_t * hfp_connection = NULL; 2453 switch (packet_type){ 2454 case RFCOMM_DATA_PACKET: 2455 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2456 btstack_assert(hfp_connection != NULL); 2457 2458 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2459 hfp_ag_run_for_context(hfp_connection); 2460 return; 2461 case HCI_EVENT_PACKET: 2462 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2463 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2464 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2465 btstack_assert(hfp_connection != NULL); 2466 2467 hfp_ag_run_for_context(hfp_connection); 2468 return; 2469 } 2470 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2471 break; 2472 default: 2473 break; 2474 } 2475 2476 hfp_ag_run(); 2477 } 2478 2479 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2480 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2481 hfp_ag_run(); 2482 } 2483 2484 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2485 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2486 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2487 return; 2488 } 2489 int i; 2490 hfp_ag_codecs_nr = codecs_nr; 2491 for (i=0; i < codecs_nr; i++){ 2492 hfp_ag_codecs[i] = codecs[i]; 2493 } 2494 } 2495 2496 void hfp_ag_init_supported_features(uint32_t supported_features){ 2497 hfp_ag_supported_features = supported_features; 2498 } 2499 2500 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2501 hfp_ag_indicators_nr = ag_indicators_nr; 2502 (void)memcpy(hfp_ag_indicators, ag_indicators, 2503 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2504 } 2505 2506 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2507 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2508 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2509 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2510 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2511 } 2512 2513 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2514 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2515 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2516 call_hold_services_nr * sizeof(char *)); 2517 } 2518 2519 2520 void hfp_ag_init(uint16_t rfcomm_channel_nr){ 2521 2522 hfp_init(); 2523 hfp_ag_call_hold_services_nr = 0; 2524 hfp_ag_response_and_hold_active = 0; 2525 hfp_ag_indicators_nr = 0; 2526 hfp_ag_codecs_nr = 0; 2527 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2528 hfp_ag_subscriber_numbers = NULL; 2529 hfp_ag_subscriber_numbers_count = 0; 2530 2531 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2532 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2533 2534 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2535 2536 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2537 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2538 2539 hfp_gsm_init(); 2540 } 2541 2542 void hfp_ag_deinit(void){ 2543 hfp_deinit(); 2544 hfp_gsm_deinit(); 2545 2546 hfp_ag_callback = NULL; 2547 hfp_ag_supported_features = 0; 2548 hfp_ag_codecs_nr = 0; 2549 hfp_ag_indicators_nr = 0; 2550 hfp_ag_call_hold_services_nr = 0; 2551 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2552 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2553 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2554 hfp_ag_subscriber_numbers = NULL; 2555 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2556 } 2557 2558 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2559 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2560 } 2561 2562 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2563 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2564 if (!hfp_connection){ 2565 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2566 } 2567 2568 hfp_trigger_release_service_level_connection(hfp_connection); 2569 hfp_ag_run_for_context(hfp_connection); 2570 return ERROR_CODE_SUCCESS; 2571 } 2572 2573 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2574 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2575 if (!hfp_connection){ 2576 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2577 } 2578 2579 hfp_connection->extended_audio_gateway_error = 0; 2580 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2581 return ERROR_CODE_COMMAND_DISALLOWED; 2582 } 2583 2584 hfp_connection->extended_audio_gateway_error = error; 2585 hfp_ag_run_for_context(hfp_connection); 2586 return ERROR_CODE_SUCCESS; 2587 } 2588 2589 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2590 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2591 return ERROR_CODE_COMMAND_DISALLOWED; 2592 } 2593 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2594 return ERROR_CODE_COMMAND_DISALLOWED; 2595 } 2596 2597 hfp_connection->establish_audio_connection = 1; 2598 if (!has_codec_negotiation_feature(hfp_connection)){ 2599 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2600 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2601 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2602 // now, pick link settings 2603 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2604 #ifdef ENABLE_CC256X_ASSISTED_HFP 2605 hfp_cc256x_prepare_for_sco(hfp_connection); 2606 #endif 2607 return ERROR_CODE_SUCCESS; 2608 } 2609 2610 uint8_t i; 2611 bool codec_was_in_use = false; 2612 bool better_codec_can_be_used = false; 2613 2614 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2615 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2616 codec_was_in_use = true; 2617 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2618 better_codec_can_be_used = true; 2619 } 2620 } 2621 2622 if (!codec_was_in_use || better_codec_can_be_used){ 2623 hfp_connection->trigger_codec_exchange = 1; 2624 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2625 } 2626 return ERROR_CODE_SUCCESS; 2627 } 2628 2629 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2630 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2631 if (!hfp_connection){ 2632 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2633 } 2634 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2635 if (status != ERROR_CODE_SUCCESS){ 2636 return status; 2637 } 2638 hfp_ag_run_for_context(hfp_connection); 2639 return ERROR_CODE_SUCCESS; 2640 } 2641 2642 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2643 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2644 if (!hfp_connection){ 2645 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2646 } 2647 2648 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2649 return ERROR_CODE_COMMAND_DISALLOWED; 2650 } 2651 2652 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2653 if (status == ERROR_CODE_SUCCESS){ 2654 hfp_ag_run_for_context(hfp_connection); 2655 } 2656 return status; 2657 } 2658 2659 /** 2660 * @brief Enable in-band ring tone 2661 */ 2662 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2663 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2664 return; 2665 } 2666 2667 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2668 2669 btstack_linked_list_iterator_t it; 2670 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2671 while (btstack_linked_list_iterator_has_next(&it)){ 2672 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2673 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2674 hfp_connection->command = HFP_CMD_CHANGE_IN_BAND_RING_TONE_SETTING; 2675 hfp_ag_run_for_context(hfp_connection); 2676 } 2677 } 2678 2679 /** 2680 * @brief Called from GSM 2681 */ 2682 void hfp_ag_incoming_call(void){ 2683 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2684 } 2685 2686 void hfp_ag_outgoing_call_initiated(const char * number) { 2687 UNUSED(number); 2688 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2689 } 2690 2691 /** 2692 * @brief number is stored. 2693 */ 2694 void hfp_ag_set_clip(uint8_t type, const char * number){ 2695 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2696 } 2697 2698 void hfp_ag_call_dropped(void){ 2699 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2700 } 2701 2702 // call from AG UI 2703 void hfp_ag_answer_incoming_call(void){ 2704 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2705 } 2706 2707 void hfp_ag_join_held_call(void){ 2708 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2709 } 2710 2711 void hfp_ag_terminate_call(void){ 2712 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2713 } 2714 2715 void hfp_ag_outgoing_call_ringing(void){ 2716 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2717 } 2718 2719 void hfp_ag_outgoing_call_established(void){ 2720 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2721 } 2722 2723 void hfp_ag_outgoing_call_rejected(void){ 2724 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2725 } 2726 2727 void hfp_ag_outgoing_call_accepted(void){ 2728 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2729 } 2730 2731 void hfp_ag_hold_incoming_call(void){ 2732 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2733 } 2734 2735 void hfp_ag_accept_held_incoming_call(void) { 2736 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2737 } 2738 2739 void hfp_ag_reject_held_incoming_call(void){ 2740 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2741 } 2742 2743 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2744 int indicator_index = get_ag_indicator_index_for_name(name); 2745 if (indicator_index < 0) return; 2746 hfp_ag_indicators[indicator_index].status = value; 2747 2748 btstack_linked_list_iterator_t it; 2749 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2750 while (btstack_linked_list_iterator_has_next(&it)){ 2751 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2752 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2753 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2754 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2755 continue; 2756 } 2757 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2758 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2759 hfp_ag_run_for_context(hfp_connection); 2760 } 2761 } 2762 2763 uint8_t hfp_ag_set_registration_status(int registration_status){ 2764 if ((registration_status < 0) || (registration_status > 1)){ 2765 return ERROR_CODE_COMMAND_DISALLOWED; 2766 } 2767 2768 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2769 2770 // if network goes away wihle a call is active: 2771 // - the call gets dropped 2772 // - we send NO CARRIER 2773 // NOTE: the CALL=0 has to be sent before NO CARRIER 2774 2775 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2776 2777 btstack_linked_list_iterator_t it; 2778 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2779 while (btstack_linked_list_iterator_has_next(&it)){ 2780 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2781 hfp_connection->ag_send_no_carrier = true; 2782 } 2783 } 2784 hfp_ag_set_ag_indicator("service", registration_status); 2785 return ERROR_CODE_SUCCESS; 2786 } 2787 2788 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2789 if ((signal_strength < 0) || (signal_strength > 5)){ 2790 return ERROR_CODE_COMMAND_DISALLOWED; 2791 } 2792 2793 hfp_ag_set_ag_indicator("signal", signal_strength); 2794 return ERROR_CODE_SUCCESS; 2795 } 2796 2797 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2798 if ((roaming_status < 0) || (roaming_status > 1)){ 2799 return ERROR_CODE_COMMAND_DISALLOWED; 2800 } 2801 2802 hfp_ag_set_ag_indicator("roam", roaming_status); 2803 return ERROR_CODE_SUCCESS; 2804 } 2805 2806 uint8_t hfp_ag_set_battery_level(int battery_level){ 2807 if ((battery_level < 0) || (battery_level > 5)){ 2808 return ERROR_CODE_COMMAND_DISALLOWED; 2809 } 2810 hfp_ag_set_ag_indicator("battchg", battery_level); 2811 return ERROR_CODE_SUCCESS; 2812 } 2813 2814 static uint8_t activate_voice_recognition(hci_con_handle_t acl_handle, bool enhanced){ 2815 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2816 if (!hfp_connection){ 2817 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2818 } 2819 2820 uint8_t status = hfp_ag_can_activate_voice_recognition(hfp_connection, enhanced); 2821 if (status == ERROR_CODE_SUCCESS){ 2822 hfp_connection->ag_activate_voice_recognition_value = 1; 2823 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2824 hfp_connection->command = HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION; 2825 hfp_connection->enhanced_voice_recognition_enabled = enhanced; 2826 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2827 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2828 hfp_ag_run_for_context(hfp_connection); 2829 } 2830 return status; 2831 } 2832 2833 static uint8_t deactivate_voice_recognition(hci_con_handle_t acl_handle, bool enhanced){ 2834 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2835 if (!hfp_connection){ 2836 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2837 } 2838 uint8_t status = hfp_ag_voice_recognition_session_active(hfp_connection, enhanced); 2839 if (status == ERROR_CODE_SUCCESS){ 2840 hfp_connection->ag_activate_voice_recognition_value = 0; 2841 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2842 hfp_connection->command = HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION; 2843 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2844 hfp_ag_run_for_context(hfp_connection); 2845 } 2846 return status; 2847 } 2848 2849 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2850 return activate_voice_recognition(acl_handle, false); 2851 } 2852 2853 uint8_t hfp_ag_activate_enhanced_voice_recognition(hci_con_handle_t acl_handle){ 2854 return activate_voice_recognition(acl_handle, true); 2855 } 2856 2857 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2858 return deactivate_voice_recognition(acl_handle, false); 2859 } 2860 2861 uint8_t hfp_ag_deactivate_enhanced_voice_recognition(hci_con_handle_t acl_handle){ 2862 return deactivate_voice_recognition(acl_handle, true); 2863 } 2864 2865 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2866 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2867 if (!hfp_connection){ 2868 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2869 } 2870 2871 uint8_t status = hfp_ag_voice_recognition_session_active(hfp_connection, true); 2872 if (status == ERROR_CODE_SUCCESS){ 2873 hfp_connection->command = HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION; 2874 hfp_connection->ag_vra_state = state; 2875 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2876 hfp_ag_run_for_context(hfp_connection); 2877 } 2878 return status; 2879 } 2880 2881 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2882 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2883 } 2884 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2885 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2886 } 2887 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2888 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2889 } 2890 2891 2892 uint8_t hfp_ag_enhanced_voice_recognition_send_message(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state, hfp_voice_recognition_message_t msg){ 2893 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2894 if (!hfp_connection){ 2895 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2896 } 2897 2898 uint8_t status = hfp_ag_can_send_enahnced_voice_recognition_message(hfp_connection, true); 2899 if (status == ERROR_CODE_SUCCESS){ 2900 hfp_connection->command = HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION; 2901 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 2902 hfp_connection->ag_msg = msg; 2903 hfp_connection->ag_vra_state = state; 2904 hfp_ag_run_for_context(hfp_connection); 2905 } 2906 return status; 2907 } 2908 2909 2910 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 2911 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2912 if (!hfp_connection){ 2913 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2914 } 2915 2916 if ((gain < 0) || (gain > 15)){ 2917 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 2918 return ERROR_CODE_COMMAND_DISALLOWED; 2919 } 2920 2921 if (hfp_connection->microphone_gain != gain){ 2922 hfp_connection->command = HFP_CMD_SET_MICROPHONE_GAIN; 2923 hfp_connection->microphone_gain = gain; 2924 hfp_connection->send_microphone_gain = 1; 2925 } 2926 hfp_ag_run_for_context(hfp_connection); 2927 return ERROR_CODE_SUCCESS; 2928 } 2929 2930 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 2931 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2932 if (!hfp_connection){ 2933 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2934 } 2935 2936 if ((gain < 0) || (gain > 15)){ 2937 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 2938 return ERROR_CODE_COMMAND_DISALLOWED; 2939 } 2940 2941 if (hfp_connection->speaker_gain != gain){ 2942 hfp_connection->speaker_gain = gain; 2943 hfp_connection->send_speaker_gain = 1; 2944 } 2945 hfp_ag_run_for_context(hfp_connection); 2946 return ERROR_CODE_SUCCESS; 2947 } 2948 2949 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 2950 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2951 if (!hfp_connection){ 2952 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2953 } 2954 2955 hfp_ag_set_clip(0, number); 2956 hfp_connection->send_phone_number_for_voice_tag = 1; 2957 return ERROR_CODE_SUCCESS; 2958 } 2959 2960 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 2961 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2962 if (!hfp_connection){ 2963 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2964 } 2965 2966 hfp_connection->send_error = 1; 2967 return ERROR_CODE_SUCCESS; 2968 } 2969 2970 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 2971 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2972 if (!hfp_connection){ 2973 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2974 } 2975 2976 hfp_connection->ok_pending = 1; 2977 return ERROR_CODE_SUCCESS; 2978 } 2979 2980 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 2981 hfp_ag_subscriber_numbers = numbers; 2982 hfp_ag_subscriber_numbers_count = numbers_count; 2983 } 2984 2985 void hfp_ag_clear_last_dialed_number(void){ 2986 hfp_gsm_clear_last_dialed_number(); 2987 } 2988 2989 void hfp_ag_set_last_dialed_number(const char * number){ 2990 hfp_gsm_set_last_dialed_number(number); 2991 } 2992 2993 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 2994 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2995 if (!hfp_connection){ 2996 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2997 } 2998 2999 if (!hfp_connection->call_waiting_notification_enabled){ 3000 return ERROR_CODE_COMMAND_DISALLOWED; 3001 } 3002 3003 hfp_connection->ag_notify_incoming_call_waiting = 1; 3004 hfp_ag_run_for_context(hfp_connection); 3005 return ERROR_CODE_SUCCESS; 3006 } 3007 3008 void hfp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name, uint8_t ability_to_reject_call, uint16_t supported_features, int wide_band_speech){ 3009 if (!name){ 3010 name = hfp_ag_default_service_name; 3011 } 3012 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3013 3014 /* 3015 * 0x01 – Ability to reject a call 3016 * 0x00 – No ability to reject a call 3017 */ 3018 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3019 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3020 3021 // Construct SupportedFeatures for SDP bitmap: 3022 // 3023 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3024 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3025 // 3026 // Wide band speech (bit 5) requires Codec negotiation 3027 // 3028 uint16_t sdp_features = supported_features & 0x1f; 3029 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3030 sdp_features |= 1 << 5; 3031 } 3032 3033 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3034 sdp_features |= 1 << 6; 3035 } 3036 3037 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3038 sdp_features |= 1 << 7; 3039 } 3040 3041 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3042 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3043 } 3044 3045 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3046 btstack_assert(callback != NULL); 3047 3048 hfp_ag_callback = callback; 3049 hfp_set_ag_callback(callback); 3050 } 3051