1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "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 bool hfp_ag_response_and_hold_active = false; 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 uint8_t evra_enabled = hfp_connection->enhanced_voice_recognition_enabled ? 1 : 0; 523 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, evra_enabled, hfp_connection->ag_vra_state); 524 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 525 } 526 527 static int hfp_ag_send_voice_recognition_cmd(hfp_connection_t * hfp_connection, uint8_t activate_voice_recognition){ 528 char buffer[30]; 529 if (hfp_connection->enhanced_voice_recognition_enabled){ 530 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition, hfp_connection->ag_vra_state); 531 } else { 532 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition); 533 } 534 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 535 } 536 537 static int hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection_t * hfp_connection){ 538 char buffer[HFP_VR_TEXT_HEADER_SIZE + HFP_MAX_VR_TEXT_SIZE]; 539 snprintf(buffer, sizeof(buffer), "\r\n%s: 1,%d,%X,%d,%d,\"%s\"\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, 540 hfp_connection->ag_vra_state, 541 hfp_connection->ag_msg.text_id, 542 hfp_connection->ag_msg.text_type, 543 hfp_connection->ag_msg.text_operation, 544 hfp_connection->ag_msg.text); 545 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 546 } 547 548 static uint8_t hfp_ag_suggest_codec(hfp_connection_t *hfp_connection){ 549 if (hfp_connection->sco_for_msbc_failed) return HFP_CODEC_CVSD; 550 551 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_ag_codecs_nr, hfp_ag_codecs)){ 552 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 553 return HFP_CODEC_MSBC; 554 } 555 } 556 return HFP_CODEC_CVSD; 557 } 558 559 /* state machines */ 560 561 static uint8_t hfp_ag_esco_s4_supported(hfp_connection_t * hfp_connection){ 562 return (hfp_connection->remote_supported_features & (1<<HFP_HFSF_ESCO_S4)) && (hfp_ag_supported_features & (1 << HFP_AGSF_ESCO_S4)); 563 } 564 565 static int codecs_exchange_state_machine(hfp_connection_t * hfp_connection){ 566 /* events ( == commands): 567 HFP_CMD_AVAILABLE_CODECS == received AT+BAC with list of codecs 568 HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 569 hf_trigger_codec_connection_setup == received BCC 570 ag_trigger_codec_connection_setup == received from AG to send BCS 571 HFP_CMD_HF_CONFIRMED_CODEC == received AT+BCS 572 */ 573 switch (hfp_connection->codecs_state){ 574 case HFP_CODECS_EXCHANGED: 575 if (hfp_connection->command == HFP_CMD_AVAILABLE_CODECS){ 576 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 577 return 1; 578 } 579 break; 580 581 case HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE: 582 case HFP_CODECS_AG_RESEND_COMMON_CODEC: 583 hfp_connection->ag_send_common_codec = true; 584 break; 585 default: 586 break; 587 } 588 589 if (hfp_connection->ag_send_common_codec){ 590 hfp_connection->ag_send_common_codec = false; 591 hfp_connection->codecs_state = HFP_CODECS_AG_SENT_COMMON_CODEC; 592 hfp_connection->suggested_codec = hfp_ag_suggest_codec(hfp_connection); 593 hfp_ag_send_suggest_codec_cmd(hfp_connection->rfcomm_cid, hfp_connection->suggested_codec); 594 return 1; 595 } 596 597 switch (hfp_connection->command){ 598 case HFP_CMD_AVAILABLE_CODECS: 599 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 600 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_LIST; 601 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 602 return 1; 603 } 604 605 switch (hfp_connection->codecs_state){ 606 case HFP_CODECS_AG_SENT_COMMON_CODEC: 607 hfp_connection->codecs_state = HFP_CODECS_AG_RESEND_COMMON_CODEC; 608 break; 609 default: 610 break; 611 } 612 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 613 return 1; 614 615 case HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 616 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE; 617 hfp_connection->establish_audio_connection = 1; 618 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 619 return 1; 620 621 case HFP_CMD_HF_CONFIRMED_CODEC: 622 if (hfp_connection->codec_confirmed != hfp_connection->suggested_codec){ 623 hfp_connection->codecs_state = HFP_CODECS_ERROR; 624 hfp_ag_send_error(hfp_connection->rfcomm_cid); 625 return 1; 626 } 627 hfp_connection->negotiated_codec = hfp_connection->codec_confirmed; 628 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 629 log_info("hfp: codec confirmed: %s", (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? "mSBC" : "CVSD"); 630 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 631 // now, pick link settings 632 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 633 #ifdef ENABLE_CC256X_ASSISTED_HFP 634 hfp_cc256x_prepare_for_sco(hfp_connection); 635 #endif 636 #ifdef ENABLE_RTK_PCM_WBS 637 hfp_connection->rtk_send_sco_config = true; 638 #endif 639 return 1; 640 default: 641 break; 642 } 643 return 0; 644 } 645 646 static void hfp_ag_slc_established(hfp_connection_t * hfp_connection){ 647 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 648 hfp_emit_slc_connection_event(hfp_connection, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 649 650 // if active call exist, set per-hfp_connection state active, too (when audio is on) 651 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 652 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 653 } 654 // if AG is ringing, also start ringing on the HF 655 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 656 switch (hfp_gsm_callsetup_status()){ 657 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 658 hfp_ag_hf_start_ringing_incoming(hfp_connection); 659 break; 660 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 661 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 662 break; 663 default: 664 break; 665 } 666 } 667 } 668 669 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 670 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 671 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 672 int sent = 0; 673 switch(hfp_connection->command){ 674 case HFP_CMD_SUPPORTED_FEATURES: 675 switch(hfp_connection->state){ 676 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 677 case HFP_EXCHANGE_SUPPORTED_FEATURES: 678 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 679 if (has_codec_negotiation_feature(hfp_connection)){ 680 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 681 } else { 682 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 683 } 684 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 685 return 1; 686 default: 687 break; 688 } 689 break; 690 case HFP_CMD_AVAILABLE_CODECS: 691 sent = codecs_exchange_state_machine(hfp_connection); 692 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 693 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 694 } 695 return sent; 696 697 case HFP_CMD_RETRIEVE_AG_INDICATORS: 698 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 699 // HF requested AG Indicators and we did expect it 700 hfp_connection->send_ag_indicators_segment = 0; 701 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 702 // continue below in state switch 703 } 704 break; 705 706 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 707 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 708 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 709 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 710 return 1; 711 712 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 713 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 714 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 715 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 716 } else if (has_hf_indicators_feature(hfp_connection)){ 717 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 718 } else { 719 hfp_ag_slc_established(hfp_connection); 720 } 721 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 722 return 1; 723 724 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 725 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 726 if (has_hf_indicators_feature(hfp_connection)){ 727 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 728 } 729 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 730 if (!has_hf_indicators_feature(hfp_connection)){ 731 hfp_ag_slc_established(hfp_connection); 732 } 733 return 1; 734 735 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 736 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 737 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 738 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 739 return 1; 740 741 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 742 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 743 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 744 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 745 return 1; 746 747 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 748 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 749 hfp_ag_slc_established(hfp_connection); 750 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 751 return 1; 752 default: 753 break; 754 } 755 756 switch (hfp_connection->state){ 757 case HFP_RETRIEVE_INDICATORS: { 758 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 759 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 760 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 761 if (next_segment < num_segments){ 762 // prepare sending of next segment 763 hfp_connection->send_ag_indicators_segment = next_segment; 764 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 765 } else { 766 // done, go to next state 767 hfp_connection->send_ag_indicators_segment = 0; 768 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 769 } 770 return 1; 771 } 772 default: 773 break; 774 } 775 return 0; 776 } 777 778 static bool hfp_ag_vra_flag_supported(hfp_connection_t * hfp_connection){ 779 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_FUNCTION); 780 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_FUNCTION); 781 return hf && ag; 782 } 783 784 static bool hfp_ag_enhanced_vra_flag_supported(hfp_connection_t * hfp_connection){ 785 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS); 786 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS); 787 return hf && ag; 788 } 789 790 static bool hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection_t * hfp_connection){ 791 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 792 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 793 return hf && ag; 794 } 795 796 static bool hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection){ 797 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 798 return false; 799 } 800 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 801 return false; 802 } 803 if (hfp_connection->ag_vra_send_command){ 804 return false; 805 } 806 return true; 807 } 808 809 static bool hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection){ 810 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 811 return false; 812 } 813 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 814 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 815 return true; 816 } 817 return false; 818 } 819 return true; 820 } 821 822 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 823 switch (hfp_connection->state){ 824 case HFP_W2_CONNECT_SCO: 825 case HFP_W4_SCO_CONNECTED: 826 case HFP_AUDIO_CONNECTION_ESTABLISHED: 827 return true; 828 default: 829 return false; 830 } 831 } 832 833 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 834 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 835 836 uint8_t event[6]; 837 event[0] = HCI_EVENT_HFP_META; 838 event[1] = sizeof(event) - 2; 839 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 840 little_endian_store_16(event, 3, acl_handle); 841 event[5] = status; 842 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 843 } 844 845 846 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 847 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 848 849 uint8_t event[8]; 850 event[0] = HCI_EVENT_HFP_META; 851 event[1] = sizeof(event) - 2; 852 event[2] = HFP_SUBEVENT_HF_INDICATOR; 853 little_endian_store_16(event, 3, acl_handle); 854 little_endian_store_16(event, 5, uuid); 855 event[7] = value; 856 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 857 } 858 859 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 860 if (!hfp_ag_callback) return; 861 862 uint8_t event[5]; 863 event[0] = HCI_EVENT_HFP_META; 864 event[1] = sizeof(event) - 2; 865 event[2] = event_subtype; 866 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 867 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 868 } 869 870 // @return status 871 static uint8_t hfp_ag_vra_state_machine_two(hfp_connection_t * hfp_connection){ 872 uint8_t status = ERROR_CODE_SUCCESS; 873 switch (hfp_connection->vra_state_requested){ 874 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 875 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 876 status = hfp_ag_setup_audio_connection(hfp_connection); 877 if (status != ERROR_CODE_SUCCESS){ 878 hfp_connection->vra_state_requested = hfp_connection->vra_state; 879 hfp_emit_voice_recognition_enabled(hfp_connection, status); 880 break; 881 } 882 } 883 hfp_connection->enhanced_voice_recognition_enabled = true; 884 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 885 hfp_connection->vra_state_requested = hfp_connection->vra_state; 886 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 887 break; 888 889 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 890 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 891 hfp_connection->vra_state_requested = hfp_connection->vra_state; 892 893 // release audio connection only if it was opened after audio VR activated 894 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 895 hfp_trigger_release_audio_connection(hfp_connection); 896 } 897 898 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 899 break; 900 901 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 902 // open only if audio connection does not already exist 903 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 904 status = hfp_ag_setup_audio_connection(hfp_connection); 905 if (status != ERROR_CODE_SUCCESS){ 906 hfp_connection->vra_state_requested = hfp_connection->vra_state; 907 hfp_emit_voice_recognition_enabled(hfp_connection, status); 908 break; 909 } 910 } 911 912 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 913 hfp_connection->vra_state_requested = hfp_connection->vra_state; 914 hfp_connection->enhanced_voice_recognition_enabled = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 915 916 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 917 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 918 } else { 919 hfp_connection->emit_vra_enabled_after_audio_established = true; 920 } 921 break; 922 923 default: 924 break; 925 } 926 return status; 927 } 928 929 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 930 uint8_t done = 0; 931 uint8_t status; 932 933 switch (hfp_connection->vra_state_requested){ 934 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 935 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 936 if (done == 0){ 937 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 938 } else { 939 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 940 } 941 hfp_connection->vra_state_requested = hfp_connection->vra_state; 942 return done; 943 944 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 945 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 946 if (done == 0){ 947 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 948 } else { 949 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 950 } 951 hfp_connection->vra_state_requested = hfp_connection->vra_state; 952 return done; 953 954 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 955 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 956 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 957 if (done == 0){ 958 hfp_connection->vra_state_requested = hfp_connection->vra_state; 959 960 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 961 hfp_emit_voice_recognition_enabled(hfp_connection, done); 962 } else { 963 hfp_emit_voice_recognition_disabled(hfp_connection, done); 964 } 965 return 0; 966 } 967 status = hfp_ag_vra_state_machine_two(hfp_connection); 968 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 969 970 default: 971 log_error("state %u", hfp_connection->vra_state_requested); 972 btstack_assert(false); 973 return 0; 974 } 975 } 976 977 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 978 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 979 return 0; 980 } 981 int done = 0; 982 uint8_t status; 983 984 // VRA action initiated by AG 985 if (hfp_connection->ag_vra_send_command){ 986 hfp_connection->ag_vra_send_command = false; 987 return hfp_ag_vra_send_command(hfp_connection); 988 } 989 990 if (hfp_connection->ag_vra_requested_by_hf){ 991 hfp_connection->ag_vra_requested_by_hf = false; 992 993 // HF initiatied voice recognition, parser extracted activation value 994 switch (hfp_connection->ag_activate_voice_recognition_value){ 995 case 0: 996 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 997 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 998 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 999 } 1000 break; 1001 1002 case 1: 1003 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 1004 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 1005 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1006 } 1007 break; 1008 1009 case 2: 1010 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1011 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1012 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1013 } 1014 break; 1015 default: 1016 break; 1017 } 1018 if (done == 0){ 1019 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1020 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1021 return 1; 1022 } 1023 1024 status = hfp_ag_vra_state_machine_two(hfp_connection); 1025 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1026 } 1027 1028 return 0; 1029 } 1030 1031 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1032 int sent = codecs_exchange_state_machine(hfp_connection); 1033 if (sent) return 1; 1034 1035 if (hfp_connection->ag_send_in_band_ring_tone_setting){ 1036 hfp_connection->ag_send_in_band_ring_tone_setting = false; 1037 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1038 return 1; 1039 } 1040 1041 switch(hfp_connection->command){ 1042 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1043 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1044 return 1; 1045 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1046 if (hfp_connection->network_operator.format != 0){ 1047 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1048 } else { 1049 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1050 } 1051 return 1; 1052 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1053 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1054 return 1; 1055 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1056 if (hfp_connection->extended_audio_gateway_error){ 1057 hfp_connection->extended_audio_gateway_error = 0; 1058 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1059 return 1; 1060 } 1061 break; 1062 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1063 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1064 return 1; 1065 default: 1066 break; 1067 } 1068 return 0; 1069 } 1070 1071 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1072 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1073 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1074 1075 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1076 1077 if (hfp_connection->release_audio_connection){ 1078 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1079 hfp_connection->release_audio_connection = 0; 1080 gap_disconnect(hfp_connection->sco_handle); 1081 return 1; 1082 } 1083 1084 // accept incoming audio connection (codec negotiation is not used) 1085 if (hfp_connection->accept_sco){ 1086 // notify about codec selection if not done already 1087 if (hfp_connection->negotiated_codec == 0){ 1088 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1089 } 1090 // 1091 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1092 hfp_connection->accept_sco = 0; 1093 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1094 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1095 return 1; 1096 } 1097 1098 // run codecs exchange 1099 int sent = codecs_exchange_state_machine(hfp_connection); 1100 if (sent) return 1; 1101 1102 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1103 if (hfp_connection->establish_audio_connection){ 1104 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1105 hfp_connection->establish_audio_connection = 0; 1106 hfp_setup_synchronous_connection(hfp_connection); 1107 return 1; 1108 } 1109 return 0; 1110 } 1111 1112 static void hfp_ag_set_callsetup_indicator(void){ 1113 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1114 if (!indicator){ 1115 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1116 return; 1117 }; 1118 indicator->status = hfp_gsm_callsetup_status(); 1119 } 1120 1121 static void hfp_ag_set_callheld_indicator(void){ 1122 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1123 if (!indicator){ 1124 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1125 return; 1126 }; 1127 indicator->status = hfp_gsm_callheld_status(); 1128 } 1129 1130 // 1131 // transition implementations for hfp_ag_call_state_machine 1132 // 1133 1134 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1135 if (use_in_band_tone()){ 1136 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1137 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1138 } else { 1139 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1140 } 1141 } 1142 1143 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1144 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1145 } 1146 1147 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1148 hfp_connection->ag_ring = 0; 1149 hfp_connection->ag_send_clip = 0; 1150 } 1151 1152 1153 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1154 btstack_linked_list_iterator_t it; 1155 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1156 while (btstack_linked_list_iterator_has_next(&it)){ 1157 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1158 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1159 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1160 1161 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1162 hfp_ag_run_for_context(hfp_connection); 1163 } 1164 } 1165 1166 static void hfp_ag_hf_trigger_ring_and_clip(hfp_connection_t * hfp_connection){ 1167 // Queue RING on this connection 1168 hfp_connection->ag_ring = 1; 1169 1170 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1171 // "If the calling subscriber number information is available from the network, the AG shall issue the 1172 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1173 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1174 1175 // trigger next message 1176 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1177 } 1178 1179 static void hfp_ag_trigger_ring_and_clip(void) { 1180 btstack_linked_list_iterator_t it; 1181 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1182 while (btstack_linked_list_iterator_has_next(&it)){ 1183 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1184 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1185 switch (hfp_connection->call_state){ 1186 case HFP_CALL_INCOMING_RINGING: 1187 case HFP_CALL_OUTGOING_RINGING: 1188 hfp_ag_hf_trigger_ring_and_clip(hfp_connection); 1189 break; 1190 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1191 // delay RING until audio connection has been established 1192 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 1193 break; 1194 default: 1195 break; 1196 } 1197 } 1198 } 1199 1200 // trigger RING and CLIP messages on connections that are ringing 1201 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1202 hfp_ag_trigger_ring_and_clip(); 1203 1204 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1205 btstack_run_loop_add_timer(timer); 1206 } 1207 1208 static void hfp_ag_ring_timeout_stop(void){ 1209 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1210 } 1211 1212 static void hfp_ag_start_ringing(void){ 1213 // setup ring timer 1214 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1215 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1216 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1217 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1218 1219 // emit start ringing 1220 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1221 1222 // send initial RING + CLIP 1223 hfp_ag_trigger_ring_and_clip(); 1224 } 1225 1226 static void hfp_ag_stop_ringing(void){ 1227 hfp_ag_ring_timeout_stop(); 1228 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1229 1230 btstack_linked_list_iterator_t it; 1231 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1232 while (btstack_linked_list_iterator_has_next(&it)){ 1233 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1234 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1235 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1236 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1237 hfp_ag_hf_stop_ringing(hfp_connection); 1238 } 1239 } 1240 1241 static void hfp_ag_trigger_incoming_call_idle(void){ 1242 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1243 if (indicator_index < 0) return; 1244 1245 // update callsetup state in connections 1246 btstack_linked_list_iterator_t it; 1247 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1248 while (btstack_linked_list_iterator_has_next(&it)){ 1249 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1250 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1251 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1252 1253 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1254 1255 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1256 1257 hfp_ag_run_for_context(hfp_connection); 1258 } 1259 1260 // start local ringing - started after connection state has been updated 1261 hfp_ag_start_ringing(); 1262 } 1263 1264 static void hfp_ag_trigger_outgoing_call(void){ 1265 btstack_linked_list_iterator_t it; 1266 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1267 while (btstack_linked_list_iterator_has_next(&it)){ 1268 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1269 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1270 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1271 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1272 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1273 } 1274 } 1275 } 1276 1277 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1278 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1279 1280 // trigger callsetup to be 1281 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1282 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1283 1284 int indicator_index ; 1285 1286 hfp_ag_set_callsetup_indicator(); 1287 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1288 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1289 1290 // put current call on hold if active 1291 if (put_call_on_hold){ 1292 log_info("AG putting current call on hold for new outgoing call"); 1293 hfp_ag_set_callheld_indicator(); 1294 indicator_index = get_ag_indicator_index_for_name("callheld"); 1295 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1296 } 1297 1298 // start audio if needed 1299 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1300 } 1301 1302 static void hfp_ag_transfer_indicator(const char * name){ 1303 int indicator_index = get_ag_indicator_index_for_name(name); 1304 if (indicator_index < 0) return; 1305 1306 btstack_linked_list_iterator_t it; 1307 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1308 while (btstack_linked_list_iterator_has_next(&it)){ 1309 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1310 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1311 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1312 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1313 hfp_ag_run_for_context(hfp_connection); 1314 } 1315 } 1316 1317 static void hfp_ag_transfer_callsetup_state(void){ 1318 hfp_ag_transfer_indicator("callsetup"); 1319 } 1320 1321 static void hfp_ag_transfer_call_state(void){ 1322 hfp_ag_transfer_indicator("call"); 1323 } 1324 1325 static void hfp_ag_transfer_callheld_state(void){ 1326 hfp_ag_transfer_indicator("callheld"); 1327 } 1328 1329 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1330 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1331 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1332 1333 hfp_ag_stop_ringing(); 1334 1335 btstack_linked_list_iterator_t it; 1336 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1337 while (btstack_linked_list_iterator_has_next(&it)){ 1338 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1339 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1340 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1341 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1342 1343 if (hfp_connection == source){ 1344 1345 if (use_in_band_tone()){ 1346 hfp_connection->call_state = HFP_CALL_ACTIVE; 1347 } else { 1348 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1349 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1350 } 1351 1352 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1353 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1354 1355 } else { 1356 hfp_connection->call_state = HFP_CALL_IDLE; 1357 } 1358 hfp_ag_run_for_context(hfp_connection); 1359 } 1360 } 1361 1362 static void hfp_ag_ag_accept_call(void){ 1363 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1364 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1365 1366 hfp_ag_stop_ringing(); 1367 1368 btstack_linked_list_iterator_t it; 1369 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1370 while (btstack_linked_list_iterator_has_next(&it)){ 1371 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1372 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1373 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1374 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1375 1376 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1377 1378 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1379 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1380 1381 hfp_ag_run_for_context(hfp_connection); 1382 break; // only single 1383 } 1384 } 1385 1386 static void hfp_ag_trigger_reject_call(void){ 1387 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1388 1389 hfp_ag_stop_ringing(); 1390 1391 btstack_linked_list_iterator_t it; 1392 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1393 while (btstack_linked_list_iterator_has_next(&it)){ 1394 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1395 if (connection->local_role != HFP_ROLE_AG) continue; 1396 if ((connection->call_state != HFP_CALL_INCOMING_RINGING) && 1397 (connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1398 1399 connection->call_state = HFP_CALL_IDLE; 1400 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1401 1402 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1403 connection->release_audio_connection = 1; 1404 } 1405 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1406 hfp_ag_run_for_context(connection); 1407 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1408 } 1409 } 1410 1411 static void hfp_ag_trigger_terminate_call(void){ 1412 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1413 1414 // no ringing during call 1415 1416 btstack_linked_list_iterator_t it; 1417 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1418 while (btstack_linked_list_iterator_has_next(&it)){ 1419 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1420 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1421 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1422 1423 hfp_connection->call_state = HFP_CALL_IDLE; 1424 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1425 1426 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1427 hfp_connection->release_audio_connection = 1; 1428 } 1429 1430 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1431 hfp_ag_run_for_context(hfp_connection); 1432 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1433 } 1434 } 1435 1436 static void hfp_ag_set_call_indicator(void){ 1437 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1438 if (!indicator){ 1439 log_error("hfp_ag_set_call_state: call indicator is missing"); 1440 return; 1441 }; 1442 indicator->status = hfp_gsm_call_status(); 1443 } 1444 1445 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1446 btstack_linked_list_iterator_t it; 1447 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1448 while (btstack_linked_list_iterator_has_next(&it)){ 1449 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1450 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1451 if (hfp_connection->call_state == call_state) return hfp_connection; 1452 } 1453 return NULL; 1454 } 1455 1456 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1457 btstack_linked_list_iterator_t it; 1458 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1459 while (btstack_linked_list_iterator_has_next(&it)){ 1460 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1461 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1462 hfp_connection->send_response_and_hold_status = state + 1; 1463 } 1464 } 1465 1466 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1467 int indicator_index; 1468 switch (hfp_connection->call_state){ 1469 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1470 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1471 1472 // we got event: audio hfp_connection established 1473 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1474 // now, we can (start) sending RING 1475 hfp_ag_hf_trigger_ring_and_clip(hfp_connection); 1476 break; 1477 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1478 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1479 // we got event: audio hfp_connection established 1480 hfp_connection->call_state = HFP_CALL_ACTIVE; 1481 break; 1482 case HFP_CALL_W2_SEND_CALL_WAITING: 1483 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1484 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1485 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1486 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1487 break; 1488 default: 1489 break; 1490 } 1491 return 0; 1492 } 1493 1494 // functions extracted from hfp_ag_call_sm below 1495 static void hfp_ag_handle_reject_outgoing_call(void){ 1496 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1497 if (!hfp_connection){ 1498 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1499 return; 1500 } 1501 1502 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1503 hfp_connection->call_state = HFP_CALL_IDLE; 1504 hfp_connection->send_error = 1; 1505 hfp_ag_run_for_context(hfp_connection); 1506 } 1507 1508 // hfp_connection is used to identify originating HF 1509 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1510 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1511 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1512 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1513 1514 switch (event){ 1515 case HFP_AG_INCOMING_CALL: 1516 switch (hfp_gsm_call_status()){ 1517 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1518 switch (hfp_gsm_callsetup_status()){ 1519 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1520 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1521 hfp_ag_set_callsetup_indicator(); 1522 hfp_ag_trigger_incoming_call_idle(); 1523 log_info("AG rings"); 1524 break; 1525 default: 1526 break; 1527 } 1528 break; 1529 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1530 switch (hfp_gsm_callsetup_status()){ 1531 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1532 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1533 hfp_ag_set_callsetup_indicator(); 1534 hfp_ag_trigger_incoming_call_during_active_one(); 1535 log_info("AG call waiting"); 1536 break; 1537 default: 1538 break; 1539 } 1540 break; 1541 default: 1542 break; 1543 } 1544 break; 1545 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1546 switch (hfp_gsm_call_status()){ 1547 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1548 switch (hfp_gsm_callsetup_status()){ 1549 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1550 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1551 hfp_ag_set_call_indicator(); 1552 hfp_ag_set_callsetup_indicator(); 1553 hfp_ag_ag_accept_call(); 1554 log_info("AG answers call, accept call by GSM"); 1555 break; 1556 default: 1557 break; 1558 } 1559 break; 1560 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1561 switch (hfp_gsm_callsetup_status()){ 1562 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1563 log_info("AG: current call is placed on hold, incoming call gets active"); 1564 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1565 hfp_ag_set_callsetup_indicator(); 1566 hfp_ag_set_callheld_indicator(); 1567 hfp_ag_transfer_callsetup_state(); 1568 hfp_ag_transfer_callheld_state(); 1569 break; 1570 default: 1571 break; 1572 } 1573 break; 1574 default: 1575 break; 1576 } 1577 break; 1578 1579 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1580 switch (hfp_gsm_call_status()){ 1581 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1582 switch (hfp_gsm_callheld_status()){ 1583 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1584 log_info("AG: joining held call with active call"); 1585 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1586 hfp_ag_set_callheld_indicator(); 1587 hfp_ag_transfer_callheld_state(); 1588 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1589 break; 1590 default: 1591 break; 1592 } 1593 break; 1594 default: 1595 break; 1596 } 1597 break; 1598 1599 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1600 switch (hfp_gsm_call_status()){ 1601 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1602 switch (hfp_gsm_callsetup_status()){ 1603 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1604 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1605 hfp_ag_set_callsetup_indicator(); 1606 hfp_ag_set_call_indicator(); 1607 hfp_ag_hf_accept_call(hfp_connection); 1608 hfp_connection->ok_pending = 1; 1609 log_info("HF answers call, accept call by GSM"); 1610 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1611 break; 1612 default: 1613 break; 1614 } 1615 break; 1616 default: 1617 break; 1618 } 1619 break; 1620 1621 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1622 switch (hfp_gsm_call_status()){ 1623 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1624 switch (hfp_gsm_callsetup_status()){ 1625 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1626 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1627 hfp_ag_response_and_hold_active = true; 1628 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1629 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1630 // as with regular call 1631 hfp_ag_set_call_indicator(); 1632 hfp_ag_set_callsetup_indicator(); 1633 hfp_ag_ag_accept_call(); 1634 log_info("AG response and hold - hold by AG"); 1635 break; 1636 default: 1637 break; 1638 } 1639 break; 1640 default: 1641 break; 1642 } 1643 break; 1644 1645 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1646 switch (hfp_gsm_call_status()){ 1647 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1648 switch (hfp_gsm_callsetup_status()){ 1649 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1650 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1651 hfp_ag_response_and_hold_active = true; 1652 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1653 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1654 // as with regular call 1655 hfp_ag_set_call_indicator(); 1656 hfp_ag_set_callsetup_indicator(); 1657 hfp_ag_hf_accept_call(hfp_connection); 1658 log_info("AG response and hold - hold by HF"); 1659 break; 1660 default: 1661 break; 1662 } 1663 break; 1664 default: 1665 break; 1666 } 1667 break; 1668 1669 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1670 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1671 if (!hfp_ag_response_and_hold_active) break; 1672 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1673 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1674 hfp_ag_response_and_hold_active = false; 1675 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1676 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1677 log_info("Held Call accepted and active"); 1678 break; 1679 1680 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1681 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1682 if (!hfp_ag_response_and_hold_active) break; 1683 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1684 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1685 hfp_ag_response_and_hold_active = false; 1686 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1687 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1688 // from terminate by ag 1689 hfp_ag_set_call_indicator(); 1690 hfp_ag_trigger_terminate_call(); 1691 break; 1692 1693 case HFP_AG_TERMINATE_CALL_BY_HF: 1694 switch (hfp_gsm_call_status()){ 1695 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1696 switch (hfp_gsm_callsetup_status()){ 1697 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1698 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1699 hfp_ag_set_callsetup_indicator(); 1700 hfp_ag_transfer_callsetup_state(); 1701 hfp_ag_trigger_reject_call(); 1702 log_info("HF Rejected Incoming call, AG terminate call"); 1703 break; 1704 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1705 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1706 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1707 hfp_ag_set_callsetup_indicator(); 1708 hfp_ag_transfer_callsetup_state(); 1709 log_info("AG terminate outgoing call process"); 1710 break; 1711 default: 1712 break; 1713 } 1714 break; 1715 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1716 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1717 hfp_ag_set_callsetup_indicator(); 1718 hfp_ag_set_call_indicator(); 1719 hfp_ag_trigger_terminate_call(); 1720 log_info("AG terminate call"); 1721 break; 1722 default: 1723 break; 1724 } 1725 break; 1726 1727 case HFP_AG_TERMINATE_CALL_BY_AG: 1728 switch (hfp_gsm_call_status()){ 1729 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1730 switch (hfp_gsm_callsetup_status()){ 1731 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1732 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1733 hfp_ag_set_callsetup_indicator(); 1734 hfp_ag_trigger_reject_call(); 1735 log_info("AG Rejected Incoming call, AG terminate call"); 1736 break; 1737 default: 1738 break; 1739 } 1740 break; 1741 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1742 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1743 hfp_ag_set_callsetup_indicator(); 1744 hfp_ag_set_call_indicator(); 1745 hfp_ag_trigger_terminate_call(); 1746 log_info("AG terminate call"); 1747 break; 1748 default: 1749 break; 1750 } 1751 break; 1752 case HFP_AG_CALL_DROPPED: 1753 switch (hfp_gsm_call_status()){ 1754 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1755 switch (hfp_gsm_callsetup_status()){ 1756 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1757 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1758 hfp_ag_stop_ringing(); 1759 break; 1760 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1761 log_info("Outgoing call interrupted\n"); 1762 break; 1763 default: 1764 break; 1765 } 1766 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1767 hfp_ag_set_callsetup_indicator(); 1768 hfp_ag_transfer_callsetup_state(); 1769 hfp_ag_trigger_terminate_call(); 1770 break; 1771 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1772 if (hfp_ag_response_and_hold_active) { 1773 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1774 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1775 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1776 } 1777 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1778 hfp_ag_set_callsetup_indicator(); 1779 hfp_ag_set_call_indicator(); 1780 hfp_ag_trigger_terminate_call(); 1781 log_info("AG notify call dropped"); 1782 break; 1783 default: 1784 break; 1785 } 1786 break; 1787 1788 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1789 // directly reject call if number of free slots is exceeded 1790 if (!hfp_gsm_call_possible()){ 1791 hfp_connection->send_error = 1; 1792 hfp_ag_run_for_context(hfp_connection); 1793 break; 1794 } 1795 1796 // note: number not used currently 1797 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1798 1799 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1800 1801 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1802 break; 1803 1804 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1805 // directly reject call if number of free slots is exceeded 1806 if (!hfp_gsm_call_possible()) { 1807 // TODO: no error for user 1808 break; 1809 } 1810 switch (hfp_gsm_call_status()) { 1811 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1812 switch (hfp_gsm_callsetup_status()) { 1813 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1814 // note: number not used currently 1815 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1816 // init call state for all connections 1817 hfp_ag_trigger_outgoing_call(); 1818 // get first one and accept call 1819 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1820 if (hfp_connection) { 1821 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1822 } 1823 break; 1824 default: 1825 // TODO: no error for user 1826 break; 1827 } 1828 break; 1829 default: 1830 // TODO: no error for user 1831 break; 1832 } 1833 break; 1834 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1835 // directly reject call if number of free slots is exceeded 1836 if (!hfp_gsm_call_possible()){ 1837 hfp_connection->send_error = 1; 1838 hfp_ag_run_for_context(hfp_connection); 1839 break; 1840 } 1841 1842 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1843 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1844 1845 log_info("Redial last number"); 1846 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1847 1848 if (strlen(last_dialed_number) > 0){ 1849 log_info("Last number exists: accept call"); 1850 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1851 } else { 1852 log_info("log_infoLast number missing: reject call"); 1853 hfp_ag_handle_reject_outgoing_call(); 1854 } 1855 break; 1856 } 1857 case HFP_AG_OUTGOING_CALL_REJECTED: 1858 hfp_ag_handle_reject_outgoing_call(); 1859 break; 1860 1861 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1862 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1863 if (!hfp_connection){ 1864 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1865 break; 1866 } 1867 1868 hfp_connection->ok_pending = 1; 1869 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1870 break; 1871 } 1872 case HFP_AG_OUTGOING_CALL_RINGING: 1873 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1874 if (!hfp_connection){ 1875 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1876 break; 1877 } 1878 1879 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1880 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1881 hfp_ag_set_callsetup_indicator(); 1882 hfp_ag_transfer_callsetup_state(); 1883 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1884 break; 1885 1886 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1887 // get outgoing call 1888 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1889 if (!hfp_connection){ 1890 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1891 } 1892 if (!hfp_connection){ 1893 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1894 break; 1895 } 1896 1897 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1898 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1899 hfp_connection->call_state = HFP_CALL_ACTIVE; 1900 hfp_ag_set_callsetup_indicator(); 1901 hfp_ag_set_call_indicator(); 1902 hfp_ag_transfer_call_state(); 1903 hfp_ag_transfer_callsetup_state(); 1904 if (callheld_status_call_on_hold_and_no_active_calls){ 1905 hfp_ag_set_callheld_indicator(); 1906 hfp_ag_transfer_callheld_state(); 1907 } 1908 hfp_ag_hf_stop_ringing(hfp_connection); 1909 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1910 break; 1911 } 1912 1913 case HFP_AG_CALL_HOLD_USER_BUSY: 1914 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1915 hfp_ag_set_callsetup_indicator(); 1916 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1917 hfp_connection->call_state = HFP_CALL_ACTIVE; 1918 log_info("AG: Call Waiting, User Busy"); 1919 break; 1920 1921 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1922 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1923 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1924 1925 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1926 if (call_held || call_setup_in_progress){ 1927 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1928 0, NULL); 1929 1930 } 1931 1932 if (call_setup_in_progress){ 1933 log_info("AG: Call Dropped, Accept new call"); 1934 hfp_ag_set_callsetup_indicator(); 1935 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1936 } else { 1937 log_info("AG: Call Dropped, Resume held call"); 1938 } 1939 if (call_held){ 1940 hfp_ag_set_callheld_indicator(); 1941 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1942 } 1943 1944 hfp_connection->call_state = HFP_CALL_ACTIVE; 1945 break; 1946 } 1947 1948 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1949 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1950 // only update if callsetup changed 1951 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1952 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1953 NULL); 1954 1955 if (call_setup_in_progress){ 1956 log_info("AG: Call on Hold, Accept new call"); 1957 hfp_ag_set_callsetup_indicator(); 1958 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1959 } else { 1960 log_info("AG: Swap calls"); 1961 } 1962 1963 hfp_ag_set_callheld_indicator(); 1964 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1965 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1966 hfp_connection->call_state = HFP_CALL_ACTIVE; 1967 break; 1968 } 1969 1970 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1971 // Adds a held call to the conversation. 1972 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1973 log_info("AG: Join 3-way-call"); 1974 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1975 hfp_ag_set_callheld_indicator(); 1976 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1977 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1978 } 1979 hfp_connection->call_state = HFP_CALL_ACTIVE; 1980 break; 1981 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1982 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1983 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1984 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1985 hfp_ag_set_call_indicator(); 1986 hfp_ag_set_callheld_indicator(); 1987 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1988 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1989 hfp_connection->call_state = HFP_CALL_IDLE; 1990 break; 1991 1992 default: 1993 break; 1994 } 1995 1996 1997 } 1998 1999 2000 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 2001 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 2002 if (!active_call) return; 2003 2004 int idx = active_call->index; 2005 hfp_enhanced_call_dir_t dir = active_call->direction; 2006 hfp_enhanced_call_status_t status = active_call->enhanced_status; 2007 hfp_enhanced_call_mode_t mode = active_call->mode; 2008 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 2009 uint8_t type = active_call->clip_type; 2010 char * number = active_call->clip_number; 2011 2012 char buffer[100]; 2013 // TODO: check length of a buffer, to fit the MTU 2014 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2015 if (number){ 2016 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2017 } 2018 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2019 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, 2020 mode, mpty, type, number); 2021 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2022 } 2023 2024 // sends pending command, returns if command was sent 2025 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2026 if (hfp_connection->send_status_of_current_calls){ 2027 hfp_connection->ok_pending = 0; 2028 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2029 hfp_connection->next_call_index++; 2030 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2031 return 1; 2032 } else { 2033 // 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 2034 hfp_connection->next_call_index = 0; 2035 hfp_connection->ok_pending = 1; 2036 hfp_connection->send_status_of_current_calls = 0; 2037 } 2038 } 2039 2040 if (hfp_connection->ag_notify_incoming_call_waiting){ 2041 hfp_connection->ag_notify_incoming_call_waiting = 0; 2042 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2043 return 1; 2044 } 2045 2046 if (hfp_connection->send_error){ 2047 hfp_connection->send_error = 0; 2048 hfp_connection->command = HFP_CMD_NONE; 2049 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2050 return 1; 2051 } 2052 2053 // note: before update AG indicators and ok_pending 2054 if (hfp_connection->send_response_and_hold_status){ 2055 int status = hfp_connection->send_response_and_hold_status - 1; 2056 hfp_connection->send_response_and_hold_status = 0; 2057 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2058 return 1; 2059 } 2060 2061 if (hfp_connection->ok_pending){ 2062 hfp_connection->ok_pending = 0; 2063 hfp_connection->command = HFP_CMD_NONE; 2064 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2065 return 1; 2066 } 2067 2068 // update AG indicators 2069 if (hfp_connection->ag_indicators_status_update_bitmap){ 2070 int i; 2071 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2072 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2073 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2074 if (!hfp_connection->enable_status_update_for_ag_indicators) { 2075 log_info("+CMER:3,0,0,0 - not sending update for '%s'", hfp_ag_indicators[i].name); 2076 break; 2077 } 2078 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2079 return 1; 2080 } 2081 } 2082 } 2083 2084 if (hfp_connection->ag_send_no_carrier){ 2085 hfp_connection->ag_send_no_carrier = false; 2086 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2087 return 1; 2088 } 2089 2090 if (hfp_connection->ag_ring){ 2091 hfp_connection->ag_ring = 0; 2092 hfp_connection->command = HFP_CMD_NONE; 2093 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2094 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2095 return 1; 2096 } 2097 2098 if (hfp_connection->ag_send_clip){ 2099 hfp_connection->ag_send_clip = 0; 2100 hfp_connection->command = HFP_CMD_NONE; 2101 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2102 return 1; 2103 } 2104 2105 if (hfp_connection->send_phone_number_for_voice_tag){ 2106 hfp_connection->send_phone_number_for_voice_tag = 0; 2107 hfp_connection->command = HFP_CMD_NONE; 2108 hfp_connection->ok_pending = 1; 2109 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2110 return 1; 2111 } 2112 2113 if (hfp_connection->send_subscriber_number){ 2114 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2115 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2116 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2117 } else { 2118 hfp_connection->send_subscriber_number = 0; 2119 hfp_connection->next_subscriber_number_to_send = 0; 2120 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2121 } 2122 hfp_connection->command = HFP_CMD_NONE; 2123 return 1; 2124 } 2125 2126 if (hfp_connection->send_microphone_gain){ 2127 hfp_connection->send_microphone_gain = 0; 2128 hfp_connection->command = HFP_CMD_NONE; 2129 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2130 return 1; 2131 } 2132 2133 if (hfp_connection->send_speaker_gain){ 2134 hfp_connection->send_speaker_gain = 0; 2135 hfp_connection->command = HFP_CMD_NONE; 2136 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2137 return 1; 2138 } 2139 2140 if (hfp_connection->send_ag_status_indicators){ 2141 hfp_connection->send_ag_status_indicators = 0; 2142 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2143 return 1; 2144 } 2145 2146 return 0; 2147 } 2148 2149 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2150 2151 btstack_assert(hfp_connection != NULL); 2152 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2153 2154 // during SDP query, RFCOMM CID is not set 2155 if (hfp_connection->rfcomm_cid == 0) return; 2156 2157 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2158 hfp_connection->emit_vra_enabled_after_audio_established = false; 2159 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2160 } 2161 2162 // assert command could be sent 2163 if (hci_can_send_command_packet_now() == 0) return; 2164 2165 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2166 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2167 hfp_connection->release_audio_connection = 0; 2168 gap_disconnect(hfp_connection->sco_handle); 2169 return; 2170 } 2171 2172 #ifdef ENABLE_CC256X_ASSISTED_HFP 2173 // WBS Disassociate 2174 if (hfp_connection->cc256x_send_wbs_disassociate){ 2175 hfp_connection->cc256x_send_wbs_disassociate = false; 2176 hci_send_cmd(&hci_ti_wbs_disassociate); 2177 return; 2178 } 2179 // Write Codec Config 2180 if (hfp_connection->cc256x_send_write_codec_config){ 2181 hfp_connection->cc256x_send_write_codec_config = false; 2182 hfp_cc256x_write_codec_config(hfp_connection); 2183 return; 2184 } 2185 // WBS Associate 2186 if (hfp_connection->cc256x_send_wbs_associate){ 2187 hfp_connection->cc256x_send_wbs_associate = false; 2188 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2189 return; 2190 } 2191 #endif 2192 #ifdef ENABLE_BCM_PCM_WBS 2193 // Enable WBS 2194 if (hfp_connection->bcm_send_enable_wbs){ 2195 hfp_connection->bcm_send_enable_wbs = false; 2196 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2197 return; 2198 } 2199 // Write I2S/PCM params 2200 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2201 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2202 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2203 return; 2204 } 2205 // Disable WBS 2206 if (hfp_connection->bcm_send_disable_wbs){ 2207 hfp_connection->bcm_send_disable_wbs = false; 2208 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2209 return; 2210 } 2211 #endif 2212 #ifdef ENABLE_RTK_PCM_WBS 2213 // Configure CVSD vs. mSBC 2214 if (hfp_connection->rtk_send_sco_config){ 2215 hfp_connection->rtk_send_sco_config = false; 2216 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2217 log_info("RTK SCO: 16k + mSBC"); 2218 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2219 } else { 2220 log_info("RTK SCO: 16k + CVSD"); 2221 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2222 } 2223 return; 2224 } 2225 #endif 2226 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2227 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2228 hfp_finalize_connection_context(hfp_connection); 2229 return; 2230 } 2231 #endif 2232 2233 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2234 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2235 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2236 return; 2237 } 2238 2239 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2240 2241 if (!cmd_sent){ 2242 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2243 } 2244 2245 if (!cmd_sent){ 2246 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2247 } 2248 2249 if (!cmd_sent){ 2250 cmd_sent = call_setup_state_machine(hfp_connection); 2251 } 2252 2253 if (!cmd_sent){ 2254 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2255 } 2256 2257 if (!cmd_sent){ 2258 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2259 } 2260 2261 // disconnect 2262 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2263 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2264 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2265 } 2266 2267 if (cmd_sent){ 2268 hfp_connection->command = HFP_CMD_NONE; 2269 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2270 } 2271 } 2272 2273 static int hfp_parser_is_end_of_line(uint8_t byte){ 2274 return (byte == '\n') || (byte == '\r'); 2275 } 2276 2277 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2278 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2279 if (size < 1) return; 2280 uint8_t status = ERROR_CODE_SUCCESS; 2281 2282 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2283 #ifdef ENABLE_HFP_AT_MESSAGES 2284 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2285 #endif 2286 2287 // process messages byte-wise 2288 int pos; 2289 for (pos = 0; pos < size ; pos++){ 2290 hfp_parse(hfp_connection, packet[pos], 0); 2291 2292 // parse until end of line 2293 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2294 2295 hfp_generic_status_indicator_t * indicator; 2296 switch(hfp_connection->command){ 2297 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2298 hfp_connection->command = HFP_CMD_NONE; 2299 hfp_connection->ag_vra_requested_by_hf = true; 2300 break; 2301 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2302 hfp_connection->command = HFP_CMD_NONE; 2303 if (hfp_ag_response_and_hold_active){ 2304 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2305 } 2306 hfp_connection->ok_pending = 1; 2307 break; 2308 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2309 hfp_connection->command = HFP_CMD_NONE; 2310 switch(hfp_connection->ag_response_and_hold_action){ 2311 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2312 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2313 break; 2314 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2315 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2316 break; 2317 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2318 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2319 break; 2320 default: 2321 break; 2322 } 2323 hfp_connection->ok_pending = 1; 2324 break; 2325 case HFP_CMD_HF_INDICATOR_STATUS: 2326 hfp_connection->command = HFP_CMD_NONE; 2327 2328 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2329 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2330 switch (indicator->uuid){ 2331 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2332 if (hfp_connection->parser_indicator_value > 1) { 2333 hfp_connection->send_error = 1; 2334 break; 2335 } 2336 hfp_connection->ok_pending = 1; 2337 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2338 break; 2339 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2340 if (hfp_connection->parser_indicator_value > 100){ 2341 hfp_connection->send_error = 1; 2342 break; 2343 } 2344 hfp_connection->ok_pending = 1; 2345 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2346 break; 2347 default: 2348 hfp_connection->send_error = 1; 2349 break; 2350 } 2351 } else { 2352 hfp_connection->send_error = 1; 2353 } 2354 break; 2355 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2356 // expected by SLC state machine 2357 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2358 hfp_connection->send_ag_indicators_segment = 0; 2359 hfp_connection->send_ag_status_indicators = 1; 2360 break; 2361 case HFP_CMD_LIST_CURRENT_CALLS: 2362 hfp_connection->command = HFP_CMD_NONE; 2363 hfp_connection->next_call_index = 0; 2364 hfp_connection->send_status_of_current_calls = 1; 2365 break; 2366 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2367 hfp_connection->command = HFP_CMD_NONE; 2368 if (hfp_ag_subscriber_numbers_count == 0){ 2369 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2370 break; 2371 } 2372 hfp_connection->next_subscriber_number_to_send = 0; 2373 hfp_connection->send_subscriber_number = 1; 2374 break; 2375 case HFP_CMD_TRANSMIT_DTMF_CODES: 2376 { 2377 hfp_connection->command = HFP_CMD_NONE; 2378 char buffer[2]; 2379 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2380 buffer[1] = 0; 2381 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2382 break; 2383 } 2384 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2385 hfp_connection->command = HFP_CMD_NONE; 2386 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2387 break; 2388 case HFP_CMD_TURN_OFF_EC_AND_NR: 2389 hfp_connection->command = HFP_CMD_NONE; 2390 2391 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2392 hfp_connection->ok_pending = 1; 2393 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2394 status = ERROR_CODE_SUCCESS; 2395 } else { 2396 hfp_connection->send_error = 1; 2397 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2398 } 2399 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2400 break; 2401 case HFP_CMD_CALL_ANSWERED: 2402 hfp_connection->command = HFP_CMD_NONE; 2403 log_info("HFP: ATA"); 2404 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2405 break; 2406 case HFP_CMD_HANG_UP_CALL: 2407 hfp_connection->command = HFP_CMD_NONE; 2408 hfp_connection->ok_pending = 1; 2409 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2410 break; 2411 case HFP_CMD_CALL_HOLD: { 2412 hfp_connection->command = HFP_CMD_NONE; 2413 hfp_connection->ok_pending = 1; 2414 2415 switch (hfp_connection->ag_call_hold_action){ 2416 case 0: 2417 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2418 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2419 break; 2420 case 1: 2421 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2422 // Where both a held and a waiting call exist, the above procedures shall apply to the 2423 // waiting call (i.e., not to the held call) in conflicting situation. 2424 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2425 break; 2426 case 2: 2427 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2428 // Where both a held and a waiting call exist, the above procedures shall apply to the 2429 // waiting call (i.e., not to the held call) in conflicting situation. 2430 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2431 break; 2432 case 3: 2433 // Adds a held call to the conversation. 2434 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2435 break; 2436 case 4: 2437 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2438 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2439 break; 2440 default: 2441 break; 2442 } 2443 hfp_connection->call_index = 0; 2444 break; 2445 } 2446 case HFP_CMD_CALL_PHONE_NUMBER: 2447 hfp_connection->command = HFP_CMD_NONE; 2448 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2449 break; 2450 case HFP_CMD_REDIAL_LAST_NUMBER: 2451 hfp_connection->command = HFP_CMD_NONE; 2452 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2453 break; 2454 case HFP_CMD_ENABLE_CLIP: 2455 hfp_connection->command = HFP_CMD_NONE; 2456 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2457 hfp_connection->ok_pending = 1; 2458 break; 2459 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2460 hfp_connection->command = HFP_CMD_NONE; 2461 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2462 hfp_connection->ok_pending = 1; 2463 break; 2464 case HFP_CMD_SET_SPEAKER_GAIN: 2465 hfp_connection->command = HFP_CMD_NONE; 2466 hfp_connection->ok_pending = 1; 2467 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2468 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2469 break; 2470 case HFP_CMD_SET_MICROPHONE_GAIN: 2471 hfp_connection->command = HFP_CMD_NONE; 2472 hfp_connection->ok_pending = 1; 2473 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2474 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2475 break; 2476 case HFP_CMD_UNKNOWN: 2477 hfp_connection->command = HFP_CMD_NONE; 2478 hfp_connection->send_error = 1; 2479 break; 2480 default: 2481 break; 2482 } 2483 } 2484 } 2485 2486 static void hfp_ag_run(void){ 2487 btstack_linked_list_iterator_t it; 2488 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2489 while (btstack_linked_list_iterator_has_next(&it)){ 2490 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2491 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2492 hfp_ag_run_for_context(hfp_connection); 2493 } 2494 } 2495 2496 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2497 hfp_connection_t * hfp_connection = NULL; 2498 switch (packet_type){ 2499 case RFCOMM_DATA_PACKET: 2500 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2501 btstack_assert(hfp_connection != NULL); 2502 2503 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2504 hfp_ag_run_for_context(hfp_connection); 2505 return; 2506 case HCI_EVENT_PACKET: 2507 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2508 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2509 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2510 btstack_assert(hfp_connection != NULL); 2511 2512 hfp_ag_run_for_context(hfp_connection); 2513 return; 2514 } 2515 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2516 break; 2517 default: 2518 break; 2519 } 2520 2521 hfp_ag_run(); 2522 } 2523 2524 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2525 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2526 hfp_ag_run(); 2527 } 2528 2529 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2530 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2531 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2532 return; 2533 } 2534 int i; 2535 hfp_ag_codecs_nr = codecs_nr; 2536 for (i=0; i < codecs_nr; i++){ 2537 hfp_ag_codecs[i] = codecs[i]; 2538 } 2539 } 2540 2541 void hfp_ag_init_supported_features(uint32_t supported_features){ 2542 hfp_ag_supported_features = supported_features; 2543 } 2544 2545 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2546 hfp_ag_indicators_nr = ag_indicators_nr; 2547 (void)memcpy(hfp_ag_indicators, ag_indicators, 2548 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2549 } 2550 2551 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2552 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2553 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2554 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2555 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2556 } 2557 2558 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2559 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2560 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2561 call_hold_services_nr * sizeof(char *)); 2562 } 2563 2564 2565 void hfp_ag_init(uint16_t rfcomm_channel_nr){ 2566 2567 hfp_init(); 2568 hfp_ag_call_hold_services_nr = 0; 2569 hfp_ag_response_and_hold_active = false; 2570 hfp_ag_indicators_nr = 0; 2571 hfp_ag_codecs_nr = 0; 2572 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2573 hfp_ag_subscriber_numbers = NULL; 2574 hfp_ag_subscriber_numbers_count = 0; 2575 2576 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2577 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2578 2579 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2580 2581 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2582 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2583 2584 hfp_gsm_init(); 2585 } 2586 2587 void hfp_ag_deinit(void){ 2588 hfp_deinit(); 2589 hfp_gsm_deinit(); 2590 2591 hfp_ag_callback = NULL; 2592 hfp_ag_supported_features = 0; 2593 hfp_ag_codecs_nr = 0; 2594 hfp_ag_indicators_nr = 0; 2595 hfp_ag_call_hold_services_nr = 0; 2596 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2597 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2598 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2599 hfp_ag_subscriber_numbers = NULL; 2600 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2601 } 2602 2603 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2604 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2605 } 2606 2607 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2608 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2609 if (!hfp_connection){ 2610 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2611 } 2612 2613 hfp_trigger_release_service_level_connection(hfp_connection); 2614 hfp_ag_run_for_context(hfp_connection); 2615 return ERROR_CODE_SUCCESS; 2616 } 2617 2618 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2619 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2620 if (!hfp_connection){ 2621 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2622 } 2623 2624 hfp_connection->extended_audio_gateway_error = 0; 2625 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2626 return ERROR_CODE_COMMAND_DISALLOWED; 2627 } 2628 2629 hfp_connection->extended_audio_gateway_error = error; 2630 hfp_ag_run_for_context(hfp_connection); 2631 return ERROR_CODE_SUCCESS; 2632 } 2633 2634 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2635 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2636 return ERROR_CODE_COMMAND_DISALLOWED; 2637 } 2638 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2639 return ERROR_CODE_COMMAND_DISALLOWED; 2640 } 2641 2642 hfp_connection->establish_audio_connection = 1; 2643 if (!has_codec_negotiation_feature(hfp_connection)){ 2644 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2645 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2646 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2647 // now, pick link settings 2648 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2649 #ifdef ENABLE_CC256X_ASSISTED_HFP 2650 hfp_cc256x_prepare_for_sco(hfp_connection); 2651 #endif 2652 return ERROR_CODE_SUCCESS; 2653 } 2654 2655 uint8_t i; 2656 bool codec_was_in_use = false; 2657 bool better_codec_can_be_used = false; 2658 2659 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2660 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2661 codec_was_in_use = true; 2662 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2663 better_codec_can_be_used = true; 2664 } 2665 } 2666 2667 if (!codec_was_in_use || better_codec_can_be_used){ 2668 hfp_connection->ag_send_common_codec = true; 2669 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2670 } 2671 return ERROR_CODE_SUCCESS; 2672 } 2673 2674 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2675 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2676 if (!hfp_connection){ 2677 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2678 } 2679 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2680 if (status != ERROR_CODE_SUCCESS){ 2681 return status; 2682 } 2683 hfp_ag_run_for_context(hfp_connection); 2684 return ERROR_CODE_SUCCESS; 2685 } 2686 2687 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2688 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2689 if (!hfp_connection){ 2690 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2691 } 2692 2693 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2694 return ERROR_CODE_COMMAND_DISALLOWED; 2695 } 2696 2697 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2698 if (status == ERROR_CODE_SUCCESS){ 2699 hfp_ag_run_for_context(hfp_connection); 2700 } 2701 return status; 2702 } 2703 2704 /** 2705 * @brief Enable in-band ring tone 2706 */ 2707 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2708 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2709 return; 2710 } 2711 2712 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2713 2714 btstack_linked_list_iterator_t it; 2715 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2716 while (btstack_linked_list_iterator_has_next(&it)){ 2717 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2718 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2719 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2720 hfp_ag_run_for_context(hfp_connection); 2721 } 2722 } 2723 2724 /** 2725 * @brief Called from GSM 2726 */ 2727 void hfp_ag_incoming_call(void){ 2728 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2729 } 2730 2731 void hfp_ag_outgoing_call_initiated(const char * number) { 2732 UNUSED(number); 2733 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2734 } 2735 2736 /** 2737 * @brief number is stored. 2738 */ 2739 void hfp_ag_set_clip(uint8_t type, const char * number){ 2740 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2741 } 2742 2743 void hfp_ag_call_dropped(void){ 2744 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2745 } 2746 2747 // call from AG UI 2748 void hfp_ag_answer_incoming_call(void){ 2749 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2750 } 2751 2752 void hfp_ag_join_held_call(void){ 2753 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2754 } 2755 2756 void hfp_ag_terminate_call(void){ 2757 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2758 } 2759 2760 void hfp_ag_outgoing_call_ringing(void){ 2761 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2762 } 2763 2764 void hfp_ag_outgoing_call_established(void){ 2765 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2766 } 2767 2768 void hfp_ag_outgoing_call_rejected(void){ 2769 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2770 } 2771 2772 void hfp_ag_outgoing_call_accepted(void){ 2773 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2774 } 2775 2776 void hfp_ag_hold_incoming_call(void){ 2777 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2778 } 2779 2780 void hfp_ag_accept_held_incoming_call(void) { 2781 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2782 } 2783 2784 void hfp_ag_reject_held_incoming_call(void){ 2785 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2786 } 2787 2788 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2789 int indicator_index = get_ag_indicator_index_for_name(name); 2790 if (indicator_index < 0) return; 2791 hfp_ag_indicators[indicator_index].status = value; 2792 2793 btstack_linked_list_iterator_t it; 2794 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2795 while (btstack_linked_list_iterator_has_next(&it)){ 2796 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2797 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2798 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2799 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2800 continue; 2801 } 2802 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2803 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2804 hfp_ag_run_for_context(hfp_connection); 2805 } 2806 } 2807 2808 uint8_t hfp_ag_set_registration_status(int registration_status){ 2809 if ((registration_status < 0) || (registration_status > 1)){ 2810 return ERROR_CODE_COMMAND_DISALLOWED; 2811 } 2812 2813 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2814 2815 // if network goes away wihle a call is active: 2816 // - the call gets dropped 2817 // - we send NO CARRIER 2818 // NOTE: the CALL=0 has to be sent before NO CARRIER 2819 2820 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2821 2822 btstack_linked_list_iterator_t it; 2823 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2824 while (btstack_linked_list_iterator_has_next(&it)){ 2825 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2826 hfp_connection->ag_send_no_carrier = true; 2827 } 2828 } 2829 hfp_ag_set_ag_indicator("service", registration_status); 2830 return ERROR_CODE_SUCCESS; 2831 } 2832 2833 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2834 if ((signal_strength < 0) || (signal_strength > 5)){ 2835 return ERROR_CODE_COMMAND_DISALLOWED; 2836 } 2837 2838 hfp_ag_set_ag_indicator("signal", signal_strength); 2839 return ERROR_CODE_SUCCESS; 2840 } 2841 2842 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2843 if ((roaming_status < 0) || (roaming_status > 1)){ 2844 return ERROR_CODE_COMMAND_DISALLOWED; 2845 } 2846 2847 hfp_ag_set_ag_indicator("roam", roaming_status); 2848 return ERROR_CODE_SUCCESS; 2849 } 2850 2851 uint8_t hfp_ag_set_battery_level(int battery_level){ 2852 if ((battery_level < 0) || (battery_level > 5)){ 2853 return ERROR_CODE_COMMAND_DISALLOWED; 2854 } 2855 hfp_ag_set_ag_indicator("battchg", battery_level); 2856 return ERROR_CODE_SUCCESS; 2857 } 2858 2859 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2860 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2861 if (!hfp_connection){ 2862 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2863 } 2864 2865 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2866 return ERROR_CODE_COMMAND_DISALLOWED; 2867 } 2868 2869 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2870 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2871 if (!enhanced_vra_supported && !legacy_vra_supported){ 2872 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2873 } 2874 2875 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2876 return ERROR_CODE_COMMAND_DISALLOWED; 2877 } 2878 2879 hfp_connection->ag_activate_voice_recognition_value = 1; 2880 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2881 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2882 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2883 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2884 hfp_connection->ag_vra_send_command = true; 2885 hfp_ag_run_for_context(hfp_connection); 2886 return ERROR_CODE_SUCCESS; 2887 } 2888 2889 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2890 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2891 if (!hfp_connection){ 2892 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2893 } 2894 2895 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2896 return ERROR_CODE_COMMAND_DISALLOWED; 2897 } 2898 2899 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2900 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2901 2902 if (!enhanced_vra_supported && !legacy_vra_supported){ 2903 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2904 } 2905 2906 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2907 return ERROR_CODE_COMMAND_DISALLOWED; 2908 } 2909 2910 hfp_connection->ag_activate_voice_recognition_value = 0; 2911 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2912 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2913 hfp_connection->ag_vra_send_command = true; 2914 hfp_ag_run_for_context(hfp_connection); 2915 return ERROR_CODE_SUCCESS; 2916 } 2917 2918 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2919 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2920 if (!hfp_connection){ 2921 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2922 } 2923 2924 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2925 return ERROR_CODE_COMMAND_DISALLOWED; 2926 } 2927 2928 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2929 return ERROR_CODE_COMMAND_DISALLOWED; 2930 } 2931 2932 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2933 return ERROR_CODE_COMMAND_DISALLOWED; 2934 } 2935 2936 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2937 if (!enhanced_vra_supported ){ 2938 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2939 } 2940 2941 2942 hfp_connection->ag_vra_state = state; 2943 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2944 hfp_connection->ag_vra_send_command = true; 2945 hfp_ag_run_for_context(hfp_connection); 2946 return ERROR_CODE_SUCCESS; 2947 } 2948 2949 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2950 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2951 } 2952 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2953 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2954 } 2955 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2956 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2957 } 2958 2959 2960 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){ 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 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2967 return ERROR_CODE_COMMAND_DISALLOWED; 2968 } 2969 2970 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2971 return ERROR_CODE_COMMAND_DISALLOWED; 2972 } 2973 2974 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2975 return ERROR_CODE_COMMAND_DISALLOWED; 2976 } 2977 2978 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2979 if (!enhanced_vra_supported ){ 2980 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2981 } 2982 2983 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 2984 if (!enhanced_vra_msg_supported ){ 2985 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2986 } 2987 2988 uint16_t message_len = strlen(msg.text); 2989 2990 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 2991 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2992 } 2993 2994 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 2995 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2996 } 2997 2998 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 2999 hfp_connection->ag_msg = msg; 3000 hfp_connection->ag_vra_state = state; 3001 hfp_connection->ag_vra_send_command = true; 3002 hfp_ag_run_for_context(hfp_connection); 3003 3004 return ERROR_CODE_SUCCESS; 3005 } 3006 3007 3008 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3009 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3010 if (!hfp_connection){ 3011 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3012 } 3013 3014 if ((gain < 0) || (gain > 15)){ 3015 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3016 return ERROR_CODE_COMMAND_DISALLOWED; 3017 } 3018 3019 if (hfp_connection->microphone_gain != gain){ 3020 hfp_connection->microphone_gain = gain; 3021 hfp_connection->send_microphone_gain = 1; 3022 } 3023 hfp_ag_run_for_context(hfp_connection); 3024 return ERROR_CODE_SUCCESS; 3025 } 3026 3027 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3028 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3029 if (!hfp_connection){ 3030 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3031 } 3032 3033 if ((gain < 0) || (gain > 15)){ 3034 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3035 return ERROR_CODE_COMMAND_DISALLOWED; 3036 } 3037 3038 if (hfp_connection->speaker_gain != gain){ 3039 hfp_connection->speaker_gain = gain; 3040 hfp_connection->send_speaker_gain = 1; 3041 } 3042 hfp_ag_run_for_context(hfp_connection); 3043 return ERROR_CODE_SUCCESS; 3044 } 3045 3046 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3047 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3048 if (!hfp_connection){ 3049 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3050 } 3051 3052 hfp_ag_set_clip(0, number); 3053 hfp_connection->send_phone_number_for_voice_tag = 1; 3054 return ERROR_CODE_SUCCESS; 3055 } 3056 3057 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3058 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3059 if (!hfp_connection){ 3060 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3061 } 3062 3063 hfp_connection->send_error = 1; 3064 return ERROR_CODE_SUCCESS; 3065 } 3066 3067 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3068 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3069 if (!hfp_connection){ 3070 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3071 } 3072 3073 hfp_connection->ok_pending = 1; 3074 return ERROR_CODE_SUCCESS; 3075 } 3076 3077 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3078 hfp_ag_subscriber_numbers = numbers; 3079 hfp_ag_subscriber_numbers_count = numbers_count; 3080 } 3081 3082 void hfp_ag_clear_last_dialed_number(void){ 3083 hfp_gsm_clear_last_dialed_number(); 3084 } 3085 3086 void hfp_ag_set_last_dialed_number(const char * number){ 3087 hfp_gsm_set_last_dialed_number(number); 3088 } 3089 3090 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3091 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3092 if (!hfp_connection){ 3093 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3094 } 3095 3096 if (!hfp_connection->call_waiting_notification_enabled){ 3097 return ERROR_CODE_COMMAND_DISALLOWED; 3098 } 3099 3100 hfp_connection->ag_notify_incoming_call_waiting = 1; 3101 hfp_ag_run_for_context(hfp_connection); 3102 return ERROR_CODE_SUCCESS; 3103 } 3104 3105 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){ 3106 if (!name){ 3107 name = hfp_ag_default_service_name; 3108 } 3109 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3110 3111 /* 3112 * 0x01 – Ability to reject a call 3113 * 0x00 – No ability to reject a call 3114 */ 3115 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3116 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3117 3118 // Construct SupportedFeatures for SDP bitmap: 3119 // 3120 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3121 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3122 // 3123 // Wide band speech (bit 5) requires Codec negotiation 3124 // 3125 uint16_t sdp_features = supported_features & 0x1f; 3126 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3127 sdp_features |= 1 << 5; 3128 } 3129 3130 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3131 sdp_features |= 1 << 6; 3132 } 3133 3134 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3135 sdp_features |= 1 << 7; 3136 } 3137 3138 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3139 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3140 } 3141 3142 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3143 btstack_assert(callback != NULL); 3144 3145 hfp_ag_callback = callback; 3146 hfp_set_ag_callback(callback); 3147 } 3148