1 /* 2 * Copyright (C) 2016 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__ "avrcp_controller.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <inttypes.h> 43 44 #include "classic/avrcp.h" 45 #include "classic/avrcp_controller.h" 46 47 #include "bluetooth_sdp.h" 48 #include "btstack_debug.h" 49 #include "btstack_event.h" 50 #include "btstack_util.h" 51 #include "l2cap.h" 52 53 // made public in avrcp_controller.h 54 avrcp_context_t avrcp_controller_context; 55 56 static uint8_t avrcp_controller_calc_next_transaction_label(uint8_t current_transaction_label){ 57 current_transaction_label++; 58 if (current_transaction_label == 16){ 59 current_transaction_label = 1; 60 } 61 return current_transaction_label; 62 } 63 64 static uint8_t avrcp_controller_get_next_transaction_label(avrcp_connection_t * connection){ 65 connection->transaction_id_counter = avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter); 66 return connection->transaction_id_counter; 67 } 68 69 static bool avrcp_controller_is_transaction_id_valid(avrcp_connection_t * connection, uint8_t transaction_id){ 70 uint8_t delta = ((int8_t) transaction_id - connection->last_confirmed_transaction_id) & 0x0f; 71 return delta < 15; 72 } 73 74 static void avrcp_controller_custome_command_data_init(avrcp_connection_t * connection, 75 avrcp_command_opcode_t opcode, avrcp_command_type_t command_type, 76 avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 77 avrcp_pdu_id_t pdu_id, uint32_t company_id){ 78 79 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 80 connection->command_opcode = opcode; 81 connection->command_type = command_type; 82 connection->subunit_type = subunit_type; 83 connection->subunit_id = subunit_id; 84 connection->company_id = company_id << 16; 85 connection->pdu_id = pdu_id; 86 connection->data = NULL; 87 connection->data_offset = 0; 88 connection->data_len = 0; 89 } 90 91 static void avrcp_controller_vendor_dependent_command_data_init(avrcp_connection_t * connection, avrcp_command_type_t command_type, avrcp_pdu_id_t pdu_id){ 92 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 93 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 94 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 95 connection->subunit_id = AVRCP_SUBUNIT_ID; 96 connection->company_id = BT_SIG_COMPANY_ID; 97 98 connection->command_type = command_type; 99 connection->pdu_id = pdu_id; 100 connection->data = connection->cmd_operands; 101 connection->data_offset = 0; 102 connection->data_len = 0; 103 } 104 105 static void avrcp_controller_pass_through_command_data_init(avrcp_connection_t * connection, avrcp_operation_id_t opid){ 106 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 107 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 108 connection->command_type = AVRCP_CTYPE_CONTROL; 109 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 110 connection->subunit_id = AVRCP_SUBUNIT_ID; 111 112 connection->company_id = 0; 113 connection->pdu_id = 0; 114 connection->operation_id = opid; 115 116 connection->data = connection->cmd_operands; 117 connection->data_offset = 0; 118 connection->data_len = 0; 119 } 120 static int avrcp_controller_supports_browsing(uint16_t controller_supported_features){ 121 return controller_supported_features & AVRCP_FEATURE_MASK_BROWSING; 122 } 123 124 static void avrcp_controller_emit_notification_complete(avrcp_connection_t * connection, uint8_t status, uint8_t event_id, bool enabled){ 125 uint8_t event[8]; 126 uint8_t pos = 0; 127 event[pos++] = HCI_EVENT_AVRCP_META; 128 event[pos++] = sizeof(event) - 2; 129 event[pos++] = AVRCP_SUBEVENT_NOTIFICATION_STATE; 130 little_endian_store_16(event, pos, connection->avrcp_cid); 131 pos += 2; 132 event[pos++] = status; 133 event[pos++] = enabled ? 1 : 0; 134 event[pos++] = event_id; 135 UNUSED(pos); 136 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 137 } 138 139 static void avrcp_controller_emit_supported_events(avrcp_connection_t * connection){ 140 uint8_t ctype = (uint8_t) AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 141 uint8_t event_id; 142 143 for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 144 if ( (connection->target_supported_notifications & (1<<event_id)) == 0){ 145 continue; 146 } 147 uint8_t event[8]; 148 uint8_t pos = 0; 149 event[pos++] = HCI_EVENT_AVRCP_META; 150 event[pos++] = sizeof(event) - 2; 151 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID; 152 little_endian_store_16(event, pos, connection->avrcp_cid); 153 pos += 2; 154 event[pos++] = ctype; 155 event[pos++] = 0; 156 event[pos++] = event_id; 157 UNUSED(pos); 158 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 159 } 160 161 uint8_t event[7]; 162 uint8_t pos = 0; 163 event[pos++] = HCI_EVENT_AVRCP_META; 164 event[pos++] = sizeof(event) - 2; 165 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE; 166 little_endian_store_16(event, pos, connection->avrcp_cid); 167 pos += 2; 168 event[pos++] = ctype; 169 event[pos++] = 0; 170 UNUSED(pos); 171 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 172 } 173 174 static void avrcp_controller_emit_notification_for_event_id(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id, 175 avrcp_command_type_t ctype, const uint8_t *payload, 176 uint16_t size) { 177 switch (event_id){ 178 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED:{ 179 if (size < 4) break; 180 uint32_t song_position = big_endian_read_32(payload, 0); 181 uint16_t offset = 0; 182 uint8_t event[10]; 183 event[offset++] = HCI_EVENT_AVRCP_META; 184 event[offset++] = sizeof(event) - 2; 185 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED; 186 little_endian_store_16(event, offset, avrcp_cid); 187 offset += 2; 188 event[offset++] = ctype; 189 little_endian_store_32(event, offset, song_position); 190 offset += 4; 191 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 192 break; 193 } 194 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED:{ 195 if (size < 1) break; 196 uint16_t offset = 0; 197 uint8_t event[7]; 198 event[offset++] = HCI_EVENT_AVRCP_META; 199 event[offset++] = sizeof(event) - 2; 200 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED; 201 little_endian_store_16(event, offset, avrcp_cid); 202 offset += 2; 203 event[offset++] = ctype; 204 event[offset++] = payload[0]; 205 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 206 break; 207 } 208 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED:{ 209 uint16_t offset = 0; 210 uint8_t event[6]; 211 event[offset++] = HCI_EVENT_AVRCP_META; 212 event[offset++] = sizeof(event) - 2; 213 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED; 214 little_endian_store_16(event, offset, avrcp_cid); 215 offset += 2; 216 event[offset++] = ctype; 217 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 218 break; 219 } 220 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED:{ 221 uint16_t offset = 0; 222 uint8_t event[6]; 223 event[offset++] = HCI_EVENT_AVRCP_META; 224 event[offset++] = sizeof(event) - 2; 225 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED; 226 little_endian_store_16(event, offset, avrcp_cid); 227 offset += 2; 228 event[offset++] = ctype; 229 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 230 break; 231 } 232 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED:{ 233 uint16_t offset = 0; 234 uint8_t event[6]; 235 event[offset++] = HCI_EVENT_AVRCP_META; 236 event[offset++] = sizeof(event) - 2; 237 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED; 238 little_endian_store_16(event, offset, avrcp_cid); 239 offset += 2; 240 event[offset++] = ctype; 241 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 242 break; 243 } 244 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED:{ 245 if (size < 1) break; 246 uint16_t offset = 0; 247 uint8_t event[7]; 248 event[offset++] = HCI_EVENT_AVRCP_META; 249 event[offset++] = sizeof(event) - 2; 250 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 251 little_endian_store_16(event, offset, avrcp_cid); 252 offset += 2; 253 event[offset++] = ctype; 254 event[offset++] = payload[0] & 0x7F; 255 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 256 break; 257 } 258 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED:{ 259 if (size < 2) break; 260 uint8_t event[8]; 261 uint16_t offset = 0; 262 uint16_t uuid = big_endian_read_16(payload, 0); 263 event[offset++] = HCI_EVENT_AVRCP_META; 264 event[offset++] = sizeof(event) - 2; 265 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_UIDS_CHANGED; 266 little_endian_store_16(event, offset, avrcp_cid); 267 offset += 2; 268 event[offset++] = ctype; 269 little_endian_store_16(event, offset, uuid); 270 offset += 2; 271 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 272 break; 273 } 274 275 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_END:{ 276 uint16_t offset = 0; 277 uint8_t event[6]; 278 event[offset++] = HCI_EVENT_AVRCP_META; 279 event[offset++] = sizeof(event) - 2; 280 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END; 281 little_endian_store_16(event, offset, avrcp_cid); 282 offset += 2; 283 event[offset++] = ctype; 284 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 285 break; 286 } 287 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_START:{ 288 uint16_t offset = 0; 289 uint8_t event[6]; 290 event[offset++] = HCI_EVENT_AVRCP_META; 291 event[offset++] = sizeof(event) - 2; 292 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_START; 293 little_endian_store_16(event, offset, avrcp_cid); 294 offset += 2; 295 event[offset++] = ctype; 296 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 297 break; 298 } 299 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED:{ 300 if (size < 1) break; 301 uint16_t offset = 0; 302 uint8_t event[7]; 303 event[offset++] = HCI_EVENT_AVRCP_META; 304 event[offset++] = sizeof(event) - 2; 305 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_BATT_STATUS_CHANGED; 306 little_endian_store_16(event, offset, avrcp_cid); 307 offset += 2; 308 event[offset++] = ctype; 309 event[offset++] = payload[0]; 310 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 311 break; 312 } 313 314 case AVRCP_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED:{ 315 if (size < 1) break; 316 uint16_t offset = 0; 317 uint8_t event[7]; 318 event[offset++] = HCI_EVENT_AVRCP_META; 319 event[offset++] = sizeof(event) - 2; 320 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED; 321 little_endian_store_16(event, offset, avrcp_cid); 322 offset += 2; 323 event[offset++] = ctype; 324 event[offset++] = payload[0]; 325 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 326 break; 327 } 328 329 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 330 default: 331 log_info("avrcp: not implemented"); 332 break; 333 } 334 } 335 336 static void avrcp_controller_emit_repeat_and_shuffle_mode(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_repeat_mode_t repeat_mode, avrcp_shuffle_mode_t shuffle_mode){ 337 btstack_assert(callback != NULL); 338 339 uint8_t event[8]; 340 int pos = 0; 341 event[pos++] = HCI_EVENT_AVRCP_META; 342 event[pos++] = sizeof(event) - 2; 343 event[pos++] = AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE; 344 little_endian_store_16(event, pos, avrcp_cid); 345 pos += 2; 346 event[pos++] = ctype; 347 event[pos++] = repeat_mode; 348 event[pos++] = shuffle_mode; 349 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 350 } 351 352 static void avrcp_controller_emit_now_playing_info_event_done(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, uint8_t status){ 353 uint8_t event[7]; 354 int pos = 0; 355 event[pos++] = HCI_EVENT_AVRCP_META; 356 event[pos++] = sizeof(event) - 2; 357 event[pos++] = AVRCP_SUBEVENT_NOW_PLAYING_INFO_DONE; 358 little_endian_store_16(event, pos, avrcp_cid); 359 pos += 2; 360 event[pos++] = ctype; 361 event[pos++] = status; 362 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 363 } 364 365 static void avrcp_controller_emit_now_playing_info_event(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_media_attribute_id_t attr_id, uint8_t * value, uint16_t value_len){ 366 uint8_t event[HCI_EVENT_BUFFER_SIZE]; 367 int pos = 0; 368 event[pos++] = HCI_EVENT_AVRCP_META; 369 // reserve one byte for subevent type and data len 370 int data_len_pos = pos; 371 pos++; 372 int subevent_type_pos = pos; 373 pos++; 374 little_endian_store_16(event, pos, avrcp_cid); 375 pos += 2; 376 event[pos++] = ctype; 377 378 switch (attr_id){ 379 case AVRCP_MEDIA_ATTR_TITLE: 380 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO; 381 event[pos++] = value_len; 382 (void)memcpy(event + pos, value, value_len); 383 break; 384 case AVRCP_MEDIA_ATTR_ARTIST: 385 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO; 386 event[pos++] = value_len; 387 (void)memcpy(event + pos, value, value_len); 388 break; 389 case AVRCP_MEDIA_ATTR_ALBUM: 390 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO; 391 event[pos++] = value_len; 392 (void)memcpy(event + pos, value, value_len); 393 break; 394 case AVRCP_MEDIA_ATTR_GENRE: 395 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO; 396 event[pos++] = value_len; 397 (void)memcpy(event + pos, value, value_len); 398 break; 399 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 400 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_SONG_LENGTH_MS_INFO; 401 if (value){ 402 little_endian_store_32(event, pos, btstack_atoi((char *)value)); 403 } else { 404 little_endian_store_32(event, pos, 0); 405 } 406 pos += 4; 407 break; 408 case AVRCP_MEDIA_ATTR_TRACK: 409 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO; 410 if (value){ 411 event[pos++] = btstack_atoi((char *)value); 412 } else { 413 event[pos++] = 0; 414 } 415 break; 416 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 417 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO; 418 if (value){ 419 event[pos++] = btstack_atoi((char *)value); 420 } else { 421 event[pos++] = 0; 422 } 423 break; 424 default: 425 break; 426 } 427 event[data_len_pos] = pos - 2; 428 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 429 } 430 431 static void avrcp_controller_emit_operation_status(btstack_packet_handler_t callback, uint8_t subevent, uint16_t avrcp_cid, uint8_t ctype, uint8_t operation_id){ 432 btstack_assert(callback != NULL); 433 434 uint8_t event[7]; 435 int pos = 0; 436 event[pos++] = HCI_EVENT_AVRCP_META; 437 event[pos++] = sizeof(event) - 2; 438 event[pos++] = subevent; 439 little_endian_store_16(event, pos, avrcp_cid); 440 pos += 2; 441 event[pos++] = ctype; 442 event[pos++] = operation_id; 443 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 444 } 445 446 static void avrcp_parser_reset(avrcp_connection_t * connection){ 447 connection->list_offset = 0; 448 connection->num_attributes = 0; 449 connection->num_parsed_attributes = 0; 450 connection->parser_attribute_header_pos = 0; 451 connection->num_received_fragments = 0; 452 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 453 } 454 455 static void avrcp_parser_process_byte(uint8_t byte, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 456 uint16_t attribute_total_value_len; 457 uint32_t attribute_id; 458 switch(connection->parser_state){ 459 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER: 460 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 461 connection->list_offset++; 462 463 if (connection->parser_attribute_header_pos < AVRCP_ATTRIBUTE_HEADER_LEN) return; 464 465 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 466 connection->attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTTE_SIZE); 467 if (connection->attribute_value_len > 0){ 468 // get ready for attribute value 469 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 470 return; 471 } 472 473 // emit empty attribute 474 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 475 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 476 477 // done, see below 478 break; 479 480 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE: 481 connection->attribute_value[connection->attribute_value_offset++] = byte; 482 connection->list_offset++; 483 484 if (connection->attribute_value_offset < connection->attribute_value_len) return; 485 486 // emit (potentially partial) attribute 487 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 488 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 489 490 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 491 if (connection->attribute_value_offset < attribute_total_value_len){ 492 // ignore rest of attribute 493 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 494 return; 495 } 496 497 // done, see below 498 break; 499 500 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 501 connection->attribute_value_offset++; 502 connection->list_offset++; 503 504 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 505 if (connection->attribute_value_offset < attribute_total_value_len) return; 506 507 // done, see below 508 break; 509 510 default: 511 return; 512 } 513 514 // attribute fully read, check if more to come 515 if (connection->list_offset < connection->list_size){ 516 // more to come, reset parser 517 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 518 connection->parser_attribute_header_pos = 0; 519 connection->attribute_value_offset = 0; 520 } else { 521 // fully done 522 avrcp_parser_reset(connection); 523 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 524 } 525 } 526 527 static void avrcp_controller_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 528 int i; 529 for (i=0;i<num_bytes_to_read;i++){ 530 avrcp_parser_process_byte(packet[i], connection, ctype); 531 } 532 } 533 534 static void avrcp_send_cmd_with_avctp_fragmentation(avrcp_connection_t * connection){ 535 l2cap_reserve_packet_buffer(); 536 uint8_t * command = l2cap_get_outgoing_buffer(); 537 538 uint16_t max_frame_size = btstack_min(l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid), AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 539 540 avctp_packet_type_t avctp_packet_type = avrcp_get_avctp_packet_type(connection); 541 542 // non-fragmented: transport header (1) + PID (2) 543 // fragmented: transport header (1) + num packets (1) + PID (2) 544 545 // AVCTP header 546 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 547 uint16_t pos = 0; 548 command[pos++] = (connection->transaction_id << 4) | (avctp_packet_type << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 549 550 551 switch (avctp_packet_type){ 552 case AVCTP_SINGLE_PACKET: 553 case AVCTP_START_PACKET: 554 if (avctp_packet_type == AVCTP_START_PACKET){ 555 // num packets: (3 bytes overhead (PID, num packets) + command) / (MTU - transport header). 556 // to get number of packets using integer division, we subtract 1 from the data e.g. len = 5, packet size 5 => need 1 packet 557 command[pos++] = ((connection->data_len + 3 - 1) / (max_frame_size - 1)) + 1; 558 } 559 // Profile IDentifier (PID) 560 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 561 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 562 563 // command_type 564 command[pos++] = connection->command_type; 565 // subunit_type | subunit ID 566 command[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 567 // opcode 568 command[pos++] = (uint8_t)connection->command_opcode; 569 570 switch (connection->command_opcode){ 571 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 572 big_endian_store_24(command, pos, connection->company_id); 573 pos += 3; 574 command[pos++] = connection->pdu_id; 575 command[pos++] = 0; // reserved(upper 6) | packet_type -> 0 576 big_endian_store_16(command, pos, connection->data_len); // parameter length 577 pos += 2; 578 break; 579 case AVRCP_CMD_OPCODE_PASS_THROUGH: 580 command[pos++] = connection->operation_id; 581 command[pos++] = (uint8_t)connection->data_len; // parameter length 582 pos += 2; 583 break; 584 case AVRCP_CMD_OPCODE_UNIT_INFO: 585 break; 586 case AVRCP_CMD_OPCODE_SUBUNIT_INFO: 587 break; 588 default: 589 btstack_assert(false); 590 return; 591 } 592 break; 593 case AVCTP_CONTINUE_PACKET: 594 case AVCTP_END_PACKET: 595 break; 596 default: 597 btstack_assert(false); 598 return; 599 } 600 601 // compare number of bytes to store with the remaining buffer size 602 uint16_t bytes_to_copy = btstack_min(connection->data_len - connection->data_offset, max_frame_size - pos); 603 604 (void)memcpy(command + pos, &connection->data[connection->data_offset], bytes_to_copy); 605 pos += bytes_to_copy; 606 connection->data_offset += bytes_to_copy; 607 608 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 609 } 610 611 static int avrcp_send_register_notification(avrcp_connection_t * connection, uint8_t event_id){ 612 uint8_t command[18]; 613 uint16_t pos = 0; 614 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 615 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 616 command[pos++] = (connection->transaction_id << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 617 618 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 619 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 620 command[pos++] = AVRCP_CTYPE_NOTIFY; 621 command[pos++] = (AVRCP_SUBUNIT_TYPE_PANEL << 3) | AVRCP_SUBUNIT_ID; 622 command[pos++] = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 623 624 big_endian_store_24(command, pos, BT_SIG_COMPANY_ID); 625 pos += 3; 626 command[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 627 command[pos++] = 0; // reserved(upper 6) | packet_type -> 0 628 big_endian_store_16(command, pos, 5); // parameter length 629 pos += 2; 630 command[pos++] = event_id; 631 big_endian_store_32(command, pos, 1); // send notification on playback position every second, for other notifications it is ignored 632 pos += 4; 633 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 634 } 635 636 static void avrcp_press_and_hold_timeout_handler(btstack_timer_source_t * timer){ 637 UNUSED(timer); 638 avrcp_connection_t * connection = (avrcp_connection_t*) btstack_run_loop_get_timer_context(timer); 639 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 640 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 641 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 642 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 643 } 644 645 static void avrcp_press_and_hold_timer_start(avrcp_connection_t * connection){ 646 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 647 btstack_run_loop_set_timer_handler(&connection->press_and_hold_cmd_timer, avrcp_press_and_hold_timeout_handler); 648 btstack_run_loop_set_timer_context(&connection->press_and_hold_cmd_timer, connection); 649 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 650 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 651 } 652 653 static void avrcp_press_and_hold_timer_stop(avrcp_connection_t * connection){ 654 connection->press_and_hold_cmd_active = false; 655 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 656 } 657 658 659 static uint8_t avrcp_controller_request_pass_through_release_control_cmd(avrcp_connection_t * connection){ 660 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 661 if (connection->press_and_hold_cmd_active){ 662 avrcp_press_and_hold_timer_stop(connection); 663 } 664 connection->operation_id = 0x80 | connection->operation_id; 665 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 666 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 667 return ERROR_CODE_SUCCESS; 668 } 669 670 static uint8_t avrcp_controller_request_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed, bool continuous_cmd){ 671 log_info("Send command %d", opid); 672 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 673 if (!connection){ 674 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 675 } 676 677 if (connection->state != AVCTP_CONNECTION_OPENED){ 678 log_error("Connection in wrong state %d, expected %d. avrcp cid 0x%02x", connection->state, AVCTP_CONNECTION_OPENED, avrcp_cid); 679 return ERROR_CODE_COMMAND_DISALLOWED; 680 } 681 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 682 avrcp_controller_pass_through_command_data_init(connection, opid); 683 684 if (playback_speed > 0){ 685 connection->data[0] = playback_speed; 686 connection->data_len = 1; 687 } 688 689 connection->press_and_hold_cmd_active = continuous_cmd; 690 if (connection->press_and_hold_cmd_active){ 691 avrcp_press_and_hold_timer_start(connection); 692 } 693 694 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 695 return ERROR_CODE_SUCCESS; 696 } 697 698 static uint8_t request_single_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 699 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, false); 700 } 701 702 static uint8_t request_continuous_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 703 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, true); 704 } 705 706 static void avrcp_controller_get_capabilities_for_connection(avrcp_connection_t * connection, uint8_t capability_id){ 707 connection->state = AVCTP_W2_SEND_COMMAND; 708 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CAPABILITIES); 709 710 // Parameter Length 711 connection->data_len = 1; 712 connection->data[0] = capability_id; // capability ID 713 714 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 715 } 716 717 static uint8_t avrcp_controller_register_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 718 if (connection->target_supported_notifications_queried && (connection->target_supported_notifications & (1 << event_id)) == 0){ 719 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 720 } 721 if ( (connection->notifications_to_deregister & (1 << event_id)) != 0){ 722 return ERROR_CODE_COMMAND_DISALLOWED; 723 } 724 if ( (connection->notifications_enabled & (1 << event_id)) != 0){ 725 return ERROR_CODE_SUCCESS; 726 } 727 connection->notifications_to_register |= (1 << event_id); 728 729 if (!connection->target_supported_notifications_queried){ 730 connection->target_supported_notifications_suppress_emit_result = true; 731 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 732 return ERROR_CODE_SUCCESS; 733 } 734 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 735 return ERROR_CODE_SUCCESS; 736 } 737 738 static uint8_t avrcp_controller_request_continuation(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id){ 739 connection->state = AVCTP_W2_SEND_COMMAND; 740 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, pdu_id); 741 742 // Parameter Length 743 connection->data_len = 3; 744 big_endian_store_16(connection->data, 0, 1); 745 connection->data[2] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 746 747 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 748 return ERROR_CODE_SUCCESS; 749 } 750 751 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 752 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE); 753 } 754 755 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 756 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE); 757 } 758 759 static void avrcp_controller_handle_notification(avrcp_connection_t *connection, avrcp_command_type_t ctype, uint8_t *payload, uint16_t size) { 760 if (size < 1) return; 761 uint16_t pos = 0; 762 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) payload[pos++]; 763 if ( (event_id < AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) || (event_id > AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 764 return; 765 } 766 767 uint16_t event_mask = (1 << event_id); 768 uint16_t reset_event_mask = ~event_mask; 769 770 switch (ctype){ 771 case AVRCP_CTYPE_RESPONSE_REJECTED: 772 connection->notifications_to_deregister &= reset_event_mask; 773 connection->notifications_to_register &= reset_event_mask; 774 connection->initial_status_reported &= reset_event_mask; 775 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, event_id, false); 776 return; 777 778 case AVRCP_CTYPE_RESPONSE_INTERIM: 779 // register as enabled 780 connection->notifications_enabled |= event_mask; 781 782 // check if initial value is already sent 783 if ( (connection->initial_status_reported & event_mask) != 0 ){ 784 return; 785 } 786 // emit event only once, initially 787 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, true); 788 connection->initial_status_reported |= event_mask; 789 // emit initial value after this switch 790 break; 791 792 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 793 // received change, event is considered de-registered 794 // we are re-enabling it automatically, if it is not 795 // explicitly disabled 796 connection->notifications_enabled &= reset_event_mask; 797 if ((connection->notifications_to_deregister & event_mask) == 0){ 798 avrcp_controller_register_notification(connection, event_id); 799 } else { 800 connection->notifications_to_deregister &= reset_event_mask; 801 connection->notifications_to_register &= reset_event_mask; 802 connection->initial_status_reported &= reset_event_mask; 803 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, false); 804 } 805 break; 806 807 default: 808 return; 809 } 810 811 avrcp_controller_emit_notification_for_event_id(connection->avrcp_cid, event_id, ctype, payload + pos, size - pos); 812 } 813 814 #ifdef ENABLE_AVCTP_FRAGMENTATION 815 static void avctp_reassemble_message(avrcp_connection_t * connection, avctp_packet_type_t packet_type, uint8_t *packet, uint16_t size){ 816 // after header (transaction label and packet type) 817 uint16_t pos; 818 uint16_t bytes_to_store; 819 820 switch (packet_type){ 821 case AVCTP_START_PACKET: 822 if (size < 2) return; 823 824 // store header 825 pos = 0; 826 connection->avctp_reassembly_buffer[pos] = packet[pos]; 827 pos++; 828 connection->avctp_reassembly_size = pos; 829 830 // NOTE: num packets not needed for reassembly, ignoring it does not pose security risk -> no need to store it 831 pos++; 832 833 // PID in reassembled packet is at offset 1, it will be read later after the avctp_reassemble_message with AVCTP_END_PACKET is called 834 835 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 836 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 837 connection->avctp_reassembly_size += bytes_to_store; 838 break; 839 840 case AVCTP_CONTINUE_PACKET: 841 case AVCTP_END_PACKET: 842 if (size < 1) return; 843 844 // store remaining data, ignore header 845 pos = 1; 846 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 847 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 848 connection->avctp_reassembly_size += bytes_to_store; 849 break; 850 851 default: 852 return; 853 } 854 } 855 #endif 856 857 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 858 if (size < 6u) return; 859 uint8_t pdu_id; 860 avrcp_packet_type_t vendor_dependent_packet_type; 861 862 uint16_t pos = 0; 863 connection->last_confirmed_transaction_id = packet[pos] >> 4; 864 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((packet[pos] >> 1) & 0x01); 865 avctp_packet_type_t packet_type = (avctp_packet_type_t)((packet[pos] >> 2) & 0x03); 866 pos++; 867 868 if (frame_type != AVRCP_RESPONSE_FRAME) return; 869 870 switch (packet_type){ 871 case AVCTP_SINGLE_PACKET: 872 break; 873 874 #ifdef ENABLE_AVCTP_FRAGMENTATION 875 case AVCTP_START_PACKET: 876 case AVCTP_CONTINUE_PACKET: 877 avctp_reassemble_message(connection, packet_type, packet, size); 878 return; 879 880 case AVCTP_END_PACKET: 881 avctp_reassemble_message(connection, packet_type, packet, size); 882 883 packet = connection->avctp_reassembly_buffer; 884 size = connection->avctp_reassembly_size; 885 break; 886 #endif 887 888 default: 889 return; 890 } 891 892 pos += 2; // PID 893 894 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 895 896 #ifdef ENABLE_LOG_INFO 897 uint8_t byte_value = packet[pos]; 898 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 899 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 900 #endif 901 pos++; 902 903 uint8_t opcode = packet[pos++]; 904 uint16_t param_length; 905 906 switch (opcode){ 907 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 908 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 909 connection->state = AVCTP_CONNECTION_OPENED; 910 911 #ifdef ENABLE_LOG_INFO 912 // page, extension code (1) 913 pos++; 914 uint8_t unit_type = packet[pos] >> 3; 915 uint8_t max_subunit_ID = packet[pos] & 0x07; 916 log_info("SUBUNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, max_subunit_ID %d", ctype, subunit_type, subunit_id, opcode, unit_type, max_subunit_ID); 917 #endif 918 break; 919 } 920 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 921 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 922 connection->state = AVCTP_CONNECTION_OPENED; 923 924 #ifdef ENABLE_LOG_INFO 925 // byte value 7 (1) 926 pos++; 927 uint8_t unit_type = packet[pos] >> 3; 928 uint8_t unit = packet[pos] & 0x07; 929 pos++; 930 uint32_t company_id = big_endian_read_24(packet, pos); 931 log_info("UNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, unit %d, company_id 0x%06" PRIx32, 932 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 933 #endif 934 break; 935 } 936 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 937 938 if ((size - pos) < 7) return; 939 940 // Company ID (3) 941 pos += 3; 942 pdu_id = packet[pos++]; 943 vendor_dependent_packet_type = (avrcp_packet_type_t)(packet[pos++] & 0x03); 944 param_length = big_endian_read_16(packet, pos); 945 pos += 2; 946 947 if ((size - pos) < param_length) return; 948 949 // handle asynchronous notifications, without changing state 950 if (pdu_id == AVRCP_PDU_ID_REGISTER_NOTIFICATION){ 951 avrcp_controller_handle_notification(connection, ctype, packet + pos, size - pos); 952 break; 953 } 954 955 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE){ 956 log_info("AVRCP_CMD_OPCODE_VENDOR_DEPENDENT state %d", connection->state); 957 return; 958 } 959 connection->state = AVCTP_CONNECTION_OPENED; 960 961 log_info("VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 962 switch (pdu_id){ 963 case AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE:{ 964 uint8_t num_attributes = packet[pos++]; 965 int i; 966 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 967 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 968 for (i = 0; i < num_attributes; i++){ 969 uint8_t attribute_id = packet[pos++]; 970 uint8_t value = packet[pos++]; 971 switch (attribute_id){ 972 case 0x02: 973 repeat_mode = (avrcp_repeat_mode_t) value; 974 break; 975 case 0x03: 976 shuffle_mode = (avrcp_shuffle_mode_t) value; 977 break; 978 default: 979 break; 980 } 981 } 982 avrcp_controller_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 983 break; 984 } 985 986 case AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE:{ 987 uint16_t offset = 0; 988 uint8_t event[6]; 989 event[offset++] = HCI_EVENT_AVRCP_META; 990 event[offset++] = sizeof(event) - 2; 991 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 992 little_endian_store_16(event, offset, connection->avrcp_cid); 993 offset += 2; 994 event[offset++] = ctype; 995 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 996 break; 997 } 998 999 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 1000 uint16_t offset = 0; 1001 uint8_t event[7]; 1002 event[offset++] = HCI_EVENT_AVRCP_META; 1003 event[offset++] = sizeof(event) - 2; 1004 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 1005 little_endian_store_16(event, offset, connection->avrcp_cid); 1006 offset += 2; 1007 event[offset++] = ctype; 1008 event[offset++] = packet[pos++]; 1009 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1010 break; 1011 } 1012 1013 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 1014 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 1015 uint8_t capability_count = 0; 1016 if (param_length > 1){ 1017 capability_count = packet[pos++]; 1018 } 1019 uint16_t i; 1020 uint16_t offset = 0; 1021 uint8_t event[10]; 1022 1023 switch (capability_id){ 1024 1025 case AVRCP_CAPABILITY_ID_COMPANY: 1026 for (i = 0; (i < capability_count) && ((size - pos) >= 3); i++){ 1027 uint32_t company_id = big_endian_read_24(packet, pos); 1028 pos += 3; 1029 log_info(" 0x%06" PRIx32 ", ", company_id); 1030 1031 offset = 0; 1032 event[offset++] = HCI_EVENT_AVRCP_META; 1033 event[offset++] = sizeof(event) - 2; 1034 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID; 1035 little_endian_store_16(event, offset, connection->avrcp_cid); 1036 offset += 2; 1037 event[offset++] = ctype; 1038 event[offset++] = 0; 1039 little_endian_store_24(event, offset, company_id); 1040 offset += 3; 1041 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1042 } 1043 1044 offset = 0; 1045 event[offset++] = HCI_EVENT_AVRCP_META; 1046 event[offset++] = sizeof(event) - 2; 1047 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID_DONE; 1048 little_endian_store_16(event, offset, connection->avrcp_cid); 1049 offset += 2; 1050 event[offset++] = ctype; 1051 event[offset++] = 0; 1052 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1053 break; 1054 1055 case AVRCP_CAPABILITY_ID_EVENT: 1056 for (i = 0; (i < capability_count) && ((size - pos) >= 1); i++){ 1057 uint8_t event_id = packet[pos++]; 1058 connection->target_supported_notifications |= (1 << event_id); 1059 } 1060 1061 // if the get supported events query is triggered by avrcp_controller_enable_notification call, 1062 // avrcp_controller_emit_supported_events should be suppressed 1063 if (connection->target_supported_notifications_suppress_emit_result){ 1064 connection->target_supported_notifications_suppress_emit_result = false; 1065 // also, notification might not be supported 1066 // if so, emit AVRCP_SUBEVENT_ENABLE_NOTIFICATION_COMPLETE event to app, 1067 // and update notifications_to_register bitmap 1068 for (i = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; i < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; i++){ 1069 if ((connection->notifications_to_register & (1<<i)) != 0){ 1070 if ((connection->target_supported_notifications & (1<<i)) == 0){ 1071 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, i, false); 1072 connection->notifications_to_register &= ~(1 << i); 1073 } 1074 } 1075 } 1076 break; 1077 } 1078 // supported events are emitted only if the get supported events query 1079 // is triggered by avrcp_controller_get_supported_events call 1080 avrcp_controller_emit_supported_events(connection); 1081 break; 1082 1083 default: 1084 // ignore 1085 break; 1086 } 1087 break; 1088 } 1089 1090 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 1091 uint32_t song_length = big_endian_read_32(packet, pos); 1092 pos += 4; 1093 uint32_t song_position = big_endian_read_32(packet, pos); 1094 pos += 4; 1095 uint8_t play_status = packet[pos]; 1096 1097 uint8_t event[15]; 1098 int offset = 0; 1099 event[offset++] = HCI_EVENT_AVRCP_META; 1100 event[offset++] = sizeof(event) - 2; 1101 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 1102 little_endian_store_16(event, offset, connection->avrcp_cid); 1103 offset += 2; 1104 event[offset++] = ctype; 1105 little_endian_store_32(event, offset, song_length); 1106 offset += 4; 1107 little_endian_store_32(event, offset, song_position); 1108 offset += 4; 1109 event[offset++] = play_status; 1110 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1111 break; 1112 } 1113 1114 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 1115 switch (vendor_dependent_packet_type){ 1116 case AVRCP_START_PACKET: 1117 case AVRCP_SINGLE_PACKET: 1118 avrcp_parser_reset(connection); 1119 connection->list_size = param_length; 1120 connection->num_attributes = packet[pos++]; 1121 1122 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1123 if (vendor_dependent_packet_type == AVRCP_START_PACKET){ 1124 avrcp_controller_request_continue_response(connection); 1125 } 1126 break; 1127 case AVRCP_CONTINUE_PACKET: 1128 case AVRCP_END_PACKET: 1129 connection->num_received_fragments++; 1130 1131 if (connection->num_received_fragments < connection->max_num_fragments){ 1132 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1133 1134 if (vendor_dependent_packet_type == AVRCP_CONTINUE_PACKET){ 1135 avrcp_controller_request_continue_response(connection); 1136 } 1137 } else { 1138 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 1139 avrcp_parser_reset(connection); 1140 avrcp_controller_request_abort_continuation(connection); 1141 } 1142 break; 1143 default: 1144 // TODO check 1145 btstack_assert(false); 1146 break; 1147 } 1148 } 1149 default: 1150 break; 1151 } 1152 break; 1153 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 1154 if ((size - pos) < 1) return; 1155 uint8_t operation_id = packet[pos++]; 1156 switch (connection->state){ 1157 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1158 // trigger release for simple command: 1159 if (!connection->press_and_hold_cmd_active){ 1160 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1161 break; 1162 } 1163 // for press and hold, send release if it just has been requested, otherwise, wait for next repeat 1164 if (connection->press_and_hold_cmd_release){ 1165 connection->press_and_hold_cmd_release = false; 1166 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1167 } else { 1168 connection->state = AVCTP_W4_STOP; 1169 } 1170 break; 1171 case AVCTP_W2_RECEIVE_RESPONSE: 1172 connection->state = AVCTP_CONNECTION_OPENED; 1173 break; 1174 default: 1175 break; 1176 } 1177 if (connection->state == AVCTP_W4_STOP){ 1178 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 1179 } 1180 if (connection->state == AVCTP_CONNECTION_OPENED) { 1181 // RELEASE response 1182 operation_id = operation_id & 0x7F; 1183 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 1184 } 1185 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 1186 // PRESS response 1187 avrcp_controller_request_pass_through_release_control_cmd(connection); 1188 } 1189 break; 1190 } 1191 default: 1192 break; 1193 } 1194 1195 // trigger pending notification reqistrations 1196 if ((connection->state == AVCTP_CONNECTION_OPENED) && connection->notifications_to_register){ 1197 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1198 } 1199 } 1200 1201 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 1202 switch (connection->state){ 1203 case AVCTP_W2_SEND_PRESS_COMMAND: 1204 case AVCTP_W2_SEND_COMMAND: 1205 case AVCTP_W2_SEND_RELEASE_COMMAND: 1206 case AVCTP_W2_SEND_AVCTP_FRAGMENTED_MESSAGE: 1207 avrcp_send_cmd_with_avctp_fragmentation(connection); 1208 1209 if (connection->data_offset < connection->data_len){ 1210 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1211 return; 1212 } 1213 if (connection->state == AVCTP_W2_SEND_PRESS_COMMAND){ 1214 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 1215 } else { 1216 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1217 } 1218 break; 1219 default: 1220 break; 1221 } 1222 1223 // send register notification if queued 1224 if (connection->notifications_to_register != 0){ 1225 uint8_t event_id; 1226 for (event_id = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t)AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 1227 if (connection->notifications_to_register & (1<<event_id)){ 1228 connection->notifications_to_register &= ~ (1 << event_id); 1229 avrcp_send_register_notification(connection, event_id); 1230 return; 1231 } 1232 } 1233 } 1234 } 1235 1236 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1237 avrcp_connection_t * connection; 1238 1239 switch (packet_type) { 1240 case L2CAP_DATA_PACKET: 1241 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1242 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1243 break; 1244 1245 case HCI_EVENT_PACKET: 1246 switch (hci_event_packet_get_type(packet)){ 1247 case L2CAP_EVENT_CAN_SEND_NOW: 1248 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1249 avrcp_controller_handle_can_send_now(connection); 1250 break; 1251 default: 1252 break; 1253 } 1254 default: 1255 break; 1256 } 1257 } 1258 1259 void avrcp_controller_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 1260 avrcp_create_sdp_record(1, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 1261 } 1262 1263 void avrcp_controller_init(void){ 1264 avrcp_controller_context.role = AVRCP_CONTROLLER; 1265 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 1266 avrcp_register_controller_packet_handler(&avrcp_controller_packet_handler); 1267 } 1268 1269 void avrcp_controller_deinit(void){ 1270 memset(&avrcp_controller_context, 0, sizeof(avrcp_context_t)); 1271 } 1272 1273 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 1274 btstack_assert(callback != NULL); 1275 avrcp_controller_context.avrcp_callback = callback; 1276 } 1277 1278 1279 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 1280 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1281 } 1282 1283 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 1284 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1285 } 1286 1287 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 1288 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1289 } 1290 1291 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 1292 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1293 } 1294 1295 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 1296 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1297 } 1298 1299 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 1300 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1301 } 1302 1303 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1304 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1305 } 1306 1307 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1308 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1309 } 1310 1311 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1312 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1313 } 1314 1315 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1316 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1317 } 1318 1319 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1320 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1321 } 1322 1323 /* start continuous cmds */ 1324 1325 uint8_t avrcp_controller_start_press_and_hold_cmd(uint16_t avrcp_cid, avrcp_operation_id_t operation_id){ 1326 return request_continuous_pass_through_press_control_cmd(avrcp_cid, operation_id, 0); 1327 } 1328 1329 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1330 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1331 } 1332 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1333 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1334 } 1335 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1336 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1337 } 1338 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1339 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1340 } 1341 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1342 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1343 } 1344 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1345 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1346 } 1347 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1348 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1349 } 1350 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1351 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1352 } 1353 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1354 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1355 } 1356 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1357 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1358 } 1359 1360 /* stop continuous cmds */ 1361 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1362 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1363 if (!connection){ 1364 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1365 } 1366 1367 switch (connection->state){ 1368 // respond when we receive response for (repeated) press command 1369 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1370 connection->press_and_hold_cmd_release = true; 1371 break; 1372 1373 // release already sent or on the way, nothing to do 1374 case AVCTP_W2_RECEIVE_RESPONSE: 1375 case AVCTP_W2_SEND_RELEASE_COMMAND: 1376 break; 1377 1378 // about to send next repeated press command or wait for it -> release right away 1379 case AVCTP_W2_SEND_PRESS_COMMAND: 1380 case AVCTP_W4_STOP: 1381 return avrcp_controller_request_pass_through_release_control_cmd(connection); 1382 1383 // otherwise reject request 1384 default: 1385 return ERROR_CODE_COMMAND_DISALLOWED; 1386 } 1387 return ERROR_CODE_SUCCESS; 1388 } 1389 1390 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1391 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1392 if (!connection){ 1393 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1394 } 1395 return avrcp_controller_register_notification(connection, event_id); 1396 } 1397 1398 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1399 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1400 if (!connection){ 1401 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1402 } 1403 if (!connection->target_supported_notifications_queried){ 1404 return ERROR_CODE_COMMAND_DISALLOWED; 1405 } 1406 1407 if ((connection->target_supported_notifications & (1 << event_id)) == 0){ 1408 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1409 } 1410 1411 if ((connection->notifications_enabled & (1 << event_id)) == 0){ 1412 return ERROR_CODE_SUCCESS; 1413 } 1414 1415 connection->notifications_to_deregister |= (1 << event_id); 1416 return ERROR_CODE_SUCCESS; 1417 } 1418 1419 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 1420 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1421 if (!connection){ 1422 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1423 } 1424 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1425 1426 connection->state = AVCTP_W2_SEND_COMMAND; 1427 avrcp_controller_custome_command_data_init(connection, AVRCP_CMD_OPCODE_UNIT_INFO, AVRCP_CTYPE_STATUS, AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, 0, 0); 1428 1429 memset(connection->data, 0xFF, 5); 1430 connection->data_len = 5; 1431 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1432 return ERROR_CODE_SUCCESS; 1433 } 1434 1435 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 1436 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1437 if (!connection){ 1438 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1439 } 1440 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1441 1442 connection->state = AVCTP_W2_SEND_COMMAND; 1443 avrcp_controller_custome_command_data_init(connection, AVRCP_CMD_OPCODE_SUBUNIT_INFO, AVRCP_CTYPE_STATUS, AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, 0, 0); 1444 1445 memset(connection->data, 0xFF, 5); 1446 connection->data[0] = 7; // page: 0, extention_code: 7 1447 connection->data_len = 5; 1448 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1449 return ERROR_CODE_SUCCESS; 1450 } 1451 1452 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 1453 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1454 if (!connection){ 1455 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1456 } 1457 if (connection->state != AVCTP_CONNECTION_OPENED){ 1458 return ERROR_CODE_COMMAND_DISALLOWED; 1459 } 1460 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_COMPANY); 1461 return ERROR_CODE_SUCCESS; 1462 } 1463 1464 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 1465 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1466 if (!connection){ 1467 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1468 } 1469 if (connection->state != AVCTP_CONNECTION_OPENED){ 1470 return ERROR_CODE_COMMAND_DISALLOWED; 1471 } 1472 1473 if (!connection->target_supported_notifications_queried){ 1474 connection->target_supported_notifications_queried = true; 1475 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 1476 return ERROR_CODE_SUCCESS; 1477 } 1478 1479 avrcp_controller_emit_supported_events(connection); 1480 return ERROR_CODE_SUCCESS; 1481 } 1482 1483 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1484 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1485 if (!connection){ 1486 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1487 } 1488 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1489 1490 connection->state = AVCTP_W2_SEND_COMMAND; 1491 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_PLAY_STATUS); 1492 1493 connection->data_len = 0; 1494 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1495 return ERROR_CODE_SUCCESS; 1496 } 1497 1498 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1499 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1500 if (!connection){ 1501 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1502 } 1503 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1504 1505 connection->state = AVCTP_W2_SEND_COMMAND; 1506 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ADDRESSED_PLAYER); 1507 1508 connection->data_len = 2; 1509 big_endian_store_16(connection->data, 0, addressed_player_id); 1510 1511 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1512 return ERROR_CODE_SUCCESS; 1513 } 1514 1515 uint8_t avrcp_controller_get_element_attributes(uint16_t avrcp_cid, uint8_t num_attributes, avrcp_media_attribute_id_t * attributes){ 1516 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1517 if (!connection){ 1518 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1519 } 1520 1521 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1522 1523 if (num_attributes >= AVRCP_MEDIA_ATTR_RESERVED) { 1524 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 1525 } 1526 1527 connection->state = AVCTP_W2_SEND_COMMAND; 1528 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES); 1529 1530 uint8_t pos = 0; 1531 // write 8 bytes value 1532 memset(connection->data, pos, 8); // identifier: PLAYING 1533 pos += 8; 1534 1535 uint8_t num_attributes_index = pos; 1536 pos++; 1537 1538 // If num_attributes is set to zero, all attribute information shall be returned, 1539 // and the AttributeID field is omitted 1540 connection->data[num_attributes_index] = 0; 1541 uint8_t i; 1542 for (i = 0; i < num_attributes; i++){ 1543 // ignore invalid attribute ID and "get all attributes" 1544 if (AVRCP_MEDIA_ATTR_ALL > attributes[i] && attributes[i] < AVRCP_MEDIA_ATTR_RESERVED){ 1545 // every attribute is 4 bytes long 1546 big_endian_store_32(connection->data, pos, attributes[i]); 1547 pos += 4; 1548 connection->data[num_attributes_index]++; 1549 } 1550 } 1551 1552 // Parameter Length 1553 connection->data_len = pos; 1554 1555 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1556 return ERROR_CODE_SUCCESS; 1557 } 1558 1559 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1560 return avrcp_controller_get_element_attributes(avrcp_cid, 0, NULL); 1561 } 1562 1563 uint8_t avrcp_controller_get_now_playing_info_for_media_attribute_id(uint16_t avrcp_cid, avrcp_media_attribute_id_t media_attribute_id){ 1564 if (media_attribute_id == AVRCP_MEDIA_ATTR_ALL){ 1565 return avrcp_controller_get_now_playing_info(avrcp_cid); 1566 } 1567 return avrcp_controller_get_element_attributes(avrcp_cid, 1, &media_attribute_id); 1568 } 1569 1570 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1571 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1572 if (!connection){ 1573 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1574 } 1575 1576 // 1577 // allow sending of multiple set abs volume commands without waiting for response 1578 // 1579 uint8_t status = ERROR_CODE_COMMAND_DISALLOWED; 1580 switch (connection->state){ 1581 case AVCTP_CONNECTION_OPENED: 1582 status = ERROR_CODE_SUCCESS; 1583 break; 1584 case AVCTP_W2_RECEIVE_RESPONSE: 1585 // - is pending response also set abs volume 1586 if (connection->command_opcode != AVRCP_CMD_OPCODE_VENDOR_DEPENDENT) break; 1587 if (connection->command_type != AVRCP_CTYPE_CONTROL) break; 1588 if (connection->subunit_type != AVRCP_SUBUNIT_TYPE_PANEL) break; 1589 if (connection->subunit_id != AVRCP_SUBUNIT_ID) break; 1590 if (connection->pdu_id != AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME) break; 1591 // - is next transaction id valid in window 1592 if (avrcp_controller_is_transaction_id_valid(connection, avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter)) == false) break; 1593 status = ERROR_CODE_SUCCESS; 1594 break; 1595 default: 1596 break; 1597 } 1598 if (status != ERROR_CODE_SUCCESS) return status; 1599 1600 connection->state = AVCTP_W2_SEND_COMMAND; 1601 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME); 1602 1603 // Parameter Length 1604 connection->data_len = 1; 1605 connection->data[0] = volume; 1606 1607 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1608 return ERROR_CODE_SUCCESS; 1609 } 1610 1611 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 1612 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1613 if (!connection){ 1614 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1615 } 1616 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1617 1618 connection->state = AVCTP_W2_SEND_COMMAND; 1619 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE); 1620 1621 connection->data_len = 5; 1622 connection->data[0] = 4; // NumPlayerApplicationSettingAttributeID 1623 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1624 connection->data[1] = 0x01; // equalizer (1-OFF, 2-ON) 1625 connection->data[2] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1626 connection->data[3] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1627 connection->data[4] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1628 1629 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1630 return ERROR_CODE_SUCCESS; 1631 } 1632 1633 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1634 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1635 if (!connection){ 1636 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1637 } 1638 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1639 1640 connection->state = AVCTP_W2_SEND_COMMAND; 1641 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE); 1642 1643 // Parameter Length 1644 connection->data_len = 3; 1645 connection->data[0] = 2; 1646 connection->data[1] = attr_id; 1647 connection->data[2] = attr_value; 1648 1649 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1650 return ERROR_CODE_SUCCESS; 1651 } 1652 1653 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1654 if ((mode < AVRCP_SHUFFLE_MODE_OFF) || (mode > AVRCP_SHUFFLE_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1655 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1656 } 1657 1658 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1659 if ((mode < AVRCP_REPEAT_MODE_OFF) || (mode > AVRCP_REPEAT_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1660 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1661 } 1662 1663 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1664 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1665 if (!connection){ 1666 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1667 } 1668 if (connection->state != AVCTP_CONNECTION_OPENED){ 1669 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1670 return ERROR_CODE_COMMAND_DISALLOWED; 1671 } 1672 connection->state = AVCTP_W2_SEND_COMMAND; 1673 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_PLAY_ITEM); 1674 1675 // Parameter Length 1676 connection->data_len = 11; 1677 connection->data[0] = scope; 1678 memset(&connection->data[1], 0, 8); 1679 if (uid){ 1680 (void)memcpy(&connection->data[1], uid, 8); 1681 } 1682 big_endian_store_16(connection->data, 9, uid_counter); 1683 1684 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1685 return ERROR_CODE_SUCCESS; 1686 } 1687 1688 uint8_t avrcp_controller_add_item_from_scope_to_now_playing_list(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1689 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1690 if (!connection){ 1691 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1692 } 1693 if (connection->state != AVCTP_CONNECTION_OPENED){ 1694 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1695 return ERROR_CODE_COMMAND_DISALLOWED; 1696 } 1697 1698 connection->state = AVCTP_W2_SEND_COMMAND; 1699 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_ADD_TO_NOW_PLAYING); 1700 1701 // Parameter Length 1702 connection->data_len = 11; 1703 connection->data[0] = scope; 1704 memset(&connection->data[1], 0, 8); 1705 if (uid){ 1706 (void)memcpy(&connection->data[1], uid, 8); 1707 } 1708 big_endian_store_16(connection->data, 9, uid_counter); 1709 1710 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1711 return ERROR_CODE_SUCCESS; 1712 } 1713 1714 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1715 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1716 if (!connection){ 1717 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1718 } 1719 connection->max_num_fragments = max_num_fragments; 1720 return ERROR_CODE_SUCCESS; 1721 } 1722 1723 1724 uint8_t avrcp_controller_send_custom_command(uint16_t avrcp_cid, 1725 avrcp_command_type_t command_type, 1726 avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 1727 avrcp_pdu_id_t pdu_id, uint32_t company_id, 1728 const uint8_t * data, uint16_t data_len){ 1729 1730 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1731 if (!connection){ 1732 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1733 } 1734 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1735 1736 connection->state = AVCTP_W2_SEND_AVCTP_FRAGMENTED_MESSAGE; 1737 avrcp_controller_custome_command_data_init(connection, AVRCP_CMD_OPCODE_VENDOR_DEPENDENT, command_type, subunit_type, subunit_id, pdu_id, company_id); 1738 1739 connection->data = (uint8_t *)data; 1740 connection->data_len = data_len; 1741 1742 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1743 return ERROR_CODE_SUCCESS; 1744 } 1745