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 51 static const char * avrcp_default_controller_service_name = "AVRCP Controller"; 52 static const char * avrcp_default_controller_service_provider_name = "BlueKitchen"; 53 54 // made public in avrcp_controller.h 55 avrcp_context_t avrcp_controller_context; 56 57 static uint8_t avrcp_controller_calc_next_transaction_label(uint8_t current_transaction_label){ 58 current_transaction_label++; 59 if (current_transaction_label == 16){ 60 current_transaction_label = 1; 61 } 62 return current_transaction_label; 63 } 64 65 static uint8_t avrcp_controller_get_next_transaction_label(avrcp_connection_t * connection){ 66 connection->transaction_id_counter = avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter); 67 return connection->transaction_id_counter; 68 } 69 70 static bool avrcp_controller_is_transaction_id_valid(avrcp_connection_t * connection, uint8_t transaction_id){ 71 uint8_t delta = ((int8_t) transaction_id - connection->controller_last_confirmed_transaction_id) & 0x0f; 72 return delta < 15; 73 } 74 75 static void avrcp_controller_custom_command_data_init(avrcp_connection_t * connection, 76 avrcp_command_opcode_t opcode, avrcp_command_type_t command_type, 77 avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 78 avrcp_pdu_id_t pdu_id, uint32_t company_id){ 79 80 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 81 connection->command_opcode = opcode; 82 connection->command_type = command_type; 83 connection->subunit_type = subunit_type; 84 connection->subunit_id = subunit_id; 85 connection->company_id = company_id; 86 connection->pdu_id = pdu_id; 87 connection->data = NULL; 88 connection->data_offset = 0; 89 connection->data_len = 0; 90 } 91 92 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, bool get_next_transaction_label){ 93 if (get_next_transaction_label){ 94 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 95 } 96 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 97 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 98 connection->subunit_id = AVRCP_SUBUNIT_ID; 99 connection->company_id = BT_SIG_COMPANY_ID; 100 101 connection->command_type = command_type; 102 connection->pdu_id = pdu_id; 103 connection->data = connection->message_body; 104 connection->data_offset = 0; 105 connection->data_len = 0; 106 } 107 108 static void avrcp_controller_pass_through_command_data_init(avrcp_connection_t * connection, avrcp_operation_id_t opid){ 109 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 110 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 111 connection->command_type = AVRCP_CTYPE_CONTROL; 112 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 113 connection->subunit_id = AVRCP_SUBUNIT_ID; 114 115 connection->company_id = 0; 116 connection->pdu_id = AVRCP_PDU_ID_UNDEFINED; 117 connection->operation_id = opid; 118 119 connection->data = connection->message_body; 120 connection->data_offset = 0; 121 connection->data_len = 0; 122 } 123 124 static int avrcp_controller_supports_browsing(uint16_t controller_supported_features){ 125 return controller_supported_features & AVRCP_FEATURE_MASK_BROWSING; 126 } 127 128 static void avrcp_controller_prepare_custom_command_response(avrcp_connection_t * connection, uint16_t response_len, uint8_t * in_place_buffer){ 129 uint8_t pos = 0; 130 in_place_buffer[pos++] = HCI_EVENT_AVRCP_META; 131 // skip len 132 pos++; 133 in_place_buffer[pos++] = AVRCP_SUBEVENT_CUSTOM_COMMAND_RESPONSE; 134 little_endian_store_16(in_place_buffer, pos, connection->avrcp_cid); 135 pos += 2; 136 in_place_buffer[pos++] = (uint8_t)connection->command_type; 137 in_place_buffer[pos++] = (uint8_t)connection->pdu_id; 138 little_endian_store_16(in_place_buffer, pos, response_len); 139 pos += 2; 140 in_place_buffer[1] = pos + response_len - 2; 141 } 142 143 static void avrcp_controller_emit_notification_complete(avrcp_connection_t * connection, uint8_t status, uint8_t event_id, bool enabled){ 144 uint8_t event[8]; 145 uint8_t pos = 0; 146 event[pos++] = HCI_EVENT_AVRCP_META; 147 event[pos++] = sizeof(event) - 2; 148 event[pos++] = AVRCP_SUBEVENT_NOTIFICATION_STATE; 149 little_endian_store_16(event, pos, connection->avrcp_cid); 150 pos += 2; 151 event[pos++] = status; 152 event[pos++] = enabled ? 1 : 0; 153 event[pos++] = event_id; 154 UNUSED(pos); 155 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static void avrcp_controller_emit_supported_events(avrcp_connection_t * connection){ 159 uint8_t ctype = (uint8_t) AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 160 uint8_t event_id; 161 162 for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 163 if ((connection->notifications_supported_by_target & (1 << event_id)) == 0){ 164 continue; 165 } 166 uint8_t event[8]; 167 uint8_t pos = 0; 168 event[pos++] = HCI_EVENT_AVRCP_META; 169 event[pos++] = sizeof(event) - 2; 170 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID; 171 little_endian_store_16(event, pos, connection->avrcp_cid); 172 pos += 2; 173 event[pos++] = ctype; 174 event[pos++] = 0; 175 event[pos++] = event_id; 176 UNUSED(pos); 177 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 178 } 179 180 uint8_t event[7]; 181 uint8_t pos = 0; 182 event[pos++] = HCI_EVENT_AVRCP_META; 183 event[pos++] = sizeof(event) - 2; 184 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE; 185 little_endian_store_16(event, pos, connection->avrcp_cid); 186 pos += 2; 187 event[pos++] = ctype; 188 event[pos++] = 0; 189 UNUSED(pos); 190 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 191 } 192 193 static void avrcp_controller_emit_notification_for_event_id(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id, 194 avrcp_command_type_t ctype, const uint8_t *payload, 195 uint16_t size) { 196 switch (event_id){ 197 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED:{ 198 if (size < 4) break; 199 uint32_t song_position = big_endian_read_32(payload, 0); 200 uint16_t offset = 0; 201 uint8_t event[10]; 202 event[offset++] = HCI_EVENT_AVRCP_META; 203 event[offset++] = sizeof(event) - 2; 204 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED; 205 little_endian_store_16(event, offset, avrcp_cid); 206 offset += 2; 207 event[offset++] = ctype; 208 little_endian_store_32(event, offset, song_position); 209 offset += 4; 210 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 211 break; 212 } 213 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED:{ 214 if (size < 1) break; 215 uint16_t offset = 0; 216 uint8_t event[7]; 217 event[offset++] = HCI_EVENT_AVRCP_META; 218 event[offset++] = sizeof(event) - 2; 219 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED; 220 little_endian_store_16(event, offset, avrcp_cid); 221 offset += 2; 222 event[offset++] = ctype; 223 event[offset++] = payload[0]; 224 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 225 break; 226 } 227 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED:{ 228 uint16_t offset = 0; 229 uint8_t event[6]; 230 event[offset++] = HCI_EVENT_AVRCP_META; 231 event[offset++] = sizeof(event) - 2; 232 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED; 233 little_endian_store_16(event, offset, avrcp_cid); 234 offset += 2; 235 event[offset++] = ctype; 236 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 237 break; 238 } 239 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED:{ 240 uint16_t offset = 0; 241 uint8_t event[6]; 242 event[offset++] = HCI_EVENT_AVRCP_META; 243 event[offset++] = sizeof(event) - 2; 244 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED; 245 little_endian_store_16(event, offset, avrcp_cid); 246 offset += 2; 247 event[offset++] = ctype; 248 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 249 break; 250 } 251 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED:{ 252 uint16_t offset = 0; 253 uint8_t event[6]; 254 event[offset++] = HCI_EVENT_AVRCP_META; 255 event[offset++] = sizeof(event) - 2; 256 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED; 257 little_endian_store_16(event, offset, avrcp_cid); 258 offset += 2; 259 event[offset++] = ctype; 260 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 261 break; 262 } 263 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED:{ 264 if (size < 1) break; 265 uint16_t offset = 0; 266 uint8_t event[7]; 267 event[offset++] = HCI_EVENT_AVRCP_META; 268 event[offset++] = sizeof(event) - 2; 269 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 270 little_endian_store_16(event, offset, avrcp_cid); 271 offset += 2; 272 event[offset++] = ctype; 273 event[offset++] = payload[0] & 0x7F; 274 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 275 break; 276 } 277 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED:{ 278 if (size < 2) break; 279 uint8_t event[8]; 280 uint16_t offset = 0; 281 uint16_t uuid = big_endian_read_16(payload, 0); 282 event[offset++] = HCI_EVENT_AVRCP_META; 283 event[offset++] = sizeof(event) - 2; 284 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_UIDS_CHANGED; 285 little_endian_store_16(event, offset, avrcp_cid); 286 offset += 2; 287 event[offset++] = ctype; 288 little_endian_store_16(event, offset, uuid); 289 offset += 2; 290 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 291 break; 292 } 293 294 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_END:{ 295 uint16_t offset = 0; 296 uint8_t event[6]; 297 event[offset++] = HCI_EVENT_AVRCP_META; 298 event[offset++] = sizeof(event) - 2; 299 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END; 300 little_endian_store_16(event, offset, avrcp_cid); 301 offset += 2; 302 event[offset++] = ctype; 303 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 304 break; 305 } 306 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_START:{ 307 uint16_t offset = 0; 308 uint8_t event[6]; 309 event[offset++] = HCI_EVENT_AVRCP_META; 310 event[offset++] = sizeof(event) - 2; 311 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_START; 312 little_endian_store_16(event, offset, avrcp_cid); 313 offset += 2; 314 event[offset++] = ctype; 315 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 316 break; 317 } 318 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED:{ 319 if (size < 1) break; 320 uint16_t offset = 0; 321 uint8_t event[7]; 322 event[offset++] = HCI_EVENT_AVRCP_META; 323 event[offset++] = sizeof(event) - 2; 324 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_BATT_STATUS_CHANGED; 325 little_endian_store_16(event, offset, avrcp_cid); 326 offset += 2; 327 event[offset++] = ctype; 328 event[offset++] = payload[0]; 329 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 330 break; 331 } 332 333 case AVRCP_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED:{ 334 if (size < 1) break; 335 uint16_t offset = 0; 336 uint8_t event[7]; 337 event[offset++] = HCI_EVENT_AVRCP_META; 338 event[offset++] = sizeof(event) - 2; 339 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED; 340 little_endian_store_16(event, offset, avrcp_cid); 341 offset += 2; 342 event[offset++] = ctype; 343 event[offset++] = payload[0]; 344 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 345 break; 346 } 347 348 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 349 default: 350 log_info("avrcp: not implemented"); 351 break; 352 } 353 } 354 355 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){ 356 btstack_assert(callback != NULL); 357 358 uint8_t event[8]; 359 int pos = 0; 360 event[pos++] = HCI_EVENT_AVRCP_META; 361 event[pos++] = sizeof(event) - 2; 362 event[pos++] = AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE; 363 little_endian_store_16(event, pos, avrcp_cid); 364 pos += 2; 365 event[pos++] = ctype; 366 event[pos++] = repeat_mode; 367 event[pos++] = shuffle_mode; 368 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 369 } 370 371 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){ 372 uint8_t event[7]; 373 int pos = 0; 374 event[pos++] = HCI_EVENT_AVRCP_META; 375 event[pos++] = sizeof(event) - 2; 376 event[pos++] = AVRCP_SUBEVENT_NOW_PLAYING_INFO_DONE; 377 little_endian_store_16(event, pos, avrcp_cid); 378 pos += 2; 379 event[pos++] = ctype; 380 event[pos++] = status; 381 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 382 } 383 384 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){ 385 uint8_t event[HCI_EVENT_BUFFER_SIZE]; 386 uint16_t pos = 0; 387 event[pos++] = HCI_EVENT_AVRCP_META; 388 // reserve one byte for subevent type and data len 389 uint16_t data_len_pos = pos; 390 pos++; 391 uint16_t subevent_type_pos = pos; 392 pos++; 393 little_endian_store_16(event, pos, avrcp_cid); 394 pos += 2; 395 event[pos++] = ctype; 396 397 switch (attr_id){ 398 case AVRCP_MEDIA_ATTR_TITLE: 399 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO; 400 btstack_assert(value_len <= 255); 401 event[pos++] = (uint8_t) value_len; 402 (void)memcpy(event + pos, value, value_len); 403 break; 404 case AVRCP_MEDIA_ATTR_ARTIST: 405 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO; 406 btstack_assert(value_len <= 255); 407 event[pos++] = (uint8_t) value_len; 408 (void)memcpy(event + pos, value, value_len); 409 break; 410 case AVRCP_MEDIA_ATTR_ALBUM: 411 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO; 412 btstack_assert(value_len <= 255); 413 event[pos++] = (uint8_t) value_len; 414 (void)memcpy(event + pos, value, value_len); 415 break; 416 case AVRCP_MEDIA_ATTR_GENRE: 417 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO; 418 btstack_assert(value_len <= 255); 419 event[pos++] = (uint8_t) value_len; 420 (void)memcpy(event + pos, value, value_len); 421 break; 422 #ifdef ENABLE_AVRCP_COVER_ART 423 case AVRCP_MEDIA_ATTR_DEFAULT_COVER_ART: 424 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_COVER_ART_INFO; 425 btstack_assert(value_len <= 255); 426 event[pos++] = (uint8_t) value_len; 427 (void)memcpy(event + pos, value, value_len); 428 break; 429 #endif 430 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 431 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_SONG_LENGTH_MS_INFO; 432 if (value){ 433 little_endian_store_32(event, pos, btstack_atoi((char *)value)); 434 } else { 435 little_endian_store_32(event, pos, 0); 436 } 437 pos += 4; 438 break; 439 case AVRCP_MEDIA_ATTR_TRACK: 440 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO; 441 if (value){ 442 event[pos++] = btstack_atoi((char *)value); 443 } else { 444 event[pos++] = 0; 445 } 446 break; 447 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 448 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO; 449 if (value){ 450 event[pos++] = btstack_atoi((char *)value); 451 } else { 452 event[pos++] = 0; 453 } 454 break; 455 default: 456 break; 457 } 458 event[data_len_pos] = pos - 2; 459 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 460 } 461 462 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){ 463 btstack_assert(callback != NULL); 464 465 uint8_t event[7]; 466 int pos = 0; 467 event[pos++] = HCI_EVENT_AVRCP_META; 468 event[pos++] = sizeof(event) - 2; 469 event[pos++] = subevent; 470 little_endian_store_16(event, pos, avrcp_cid); 471 pos += 2; 472 event[pos++] = ctype; 473 event[pos++] = operation_id; 474 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 475 } 476 477 static void avrcp_parser_reset(avrcp_connection_t * connection){ 478 connection->list_offset = 0; 479 connection->parser_attribute_header_pos = 0; 480 connection->controller_num_received_fragments = 0; 481 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 482 } 483 484 static void avrcp_parser_process_byte(uint8_t byte, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 485 uint16_t attribute_total_value_len; 486 uint32_t attribute_id; 487 switch(connection->parser_state){ 488 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER: 489 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 490 connection->list_offset++; 491 492 if (connection->parser_attribute_header_pos < AVRCP_ATTRIBUTE_HEADER_LEN) return; 493 494 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 495 connection->attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTE_SIZE); 496 if (connection->attribute_value_len > 0){ 497 // get ready for attribute value 498 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 499 return; 500 } 501 502 // emit empty attribute 503 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 504 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); 505 506 // done, see below 507 break; 508 509 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE: 510 connection->attribute_value[connection->attribute_value_offset++] = byte; 511 connection->list_offset++; 512 513 if (connection->attribute_value_offset < connection->attribute_value_len) return; 514 515 // emit (potentially partial) attribute 516 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 517 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); 518 519 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 520 if (connection->attribute_value_offset < attribute_total_value_len){ 521 // ignore rest of attribute 522 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 523 return; 524 } 525 526 // done, see below 527 break; 528 529 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 530 connection->attribute_value_offset++; 531 connection->list_offset++; 532 533 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 534 if (connection->attribute_value_offset < attribute_total_value_len) return; 535 536 // done, see below 537 break; 538 539 default: 540 return; 541 } 542 543 // attribute fully read, check if more to come 544 if (connection->list_offset < connection->list_size){ 545 // more to come, reset parser 546 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 547 connection->parser_attribute_header_pos = 0; 548 connection->attribute_value_offset = 0; 549 } else { 550 // fully done 551 avrcp_parser_reset(connection); 552 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 553 } 554 } 555 556 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){ 557 int i; 558 for (i=0;i<num_bytes_to_read;i++){ 559 avrcp_parser_process_byte(packet[i], connection, ctype); 560 } 561 } 562 563 static void avrcp_send_cmd_with_avctp_fragmentation(avrcp_connection_t * connection){ 564 l2cap_reserve_packet_buffer(); 565 uint8_t * packet = l2cap_get_outgoing_buffer(); 566 567 uint16_t max_payload_size; 568 connection->avctp_packet_type = avctp_get_packet_type(connection, &max_payload_size); 569 connection->avrcp_packet_type = avrcp_get_packet_type(connection); 570 571 // non-fragmented: transport header (1) + PID (2) 572 // fragmented: transport header (1) + num packets (1) + PID (2) 573 574 uint16_t param_len = connection->data_len; 575 // AVCTP header 576 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 577 uint16_t pos = 0; 578 packet[pos++] = (connection->transaction_id << 4) | (connection->avctp_packet_type << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 579 580 if (connection->avctp_packet_type == AVCTP_START_PACKET){ 581 uint16_t max_frame_size = btstack_min(connection->l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 582 // first packet: max_payload_size 583 // rest packets 584 uint16_t num_payload_bytes = param_len - max_payload_size; 585 uint16_t frame_size_for_continue_packet = max_frame_size - avctp_get_num_bytes_for_header(AVCTP_CONTINUE_PACKET); 586 uint16_t num_avctp_packets = (num_payload_bytes + frame_size_for_continue_packet - 1)/frame_size_for_continue_packet + 1; 587 btstack_assert(num_avctp_packets <= 255); 588 packet[pos++] = (uint8_t) num_avctp_packets; 589 } 590 591 switch (connection->avctp_packet_type){ 592 case AVCTP_SINGLE_PACKET: 593 case AVCTP_START_PACKET: 594 connection->data_offset = 0; 595 // Profile IDentifier (PID) 596 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 597 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 598 599 // command_type 600 packet[pos++] = connection->command_type; 601 // subunit_type | subunit ID 602 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 603 // opcode 604 packet[pos++] = (uint8_t)connection->command_opcode; 605 606 switch (connection->command_opcode){ 607 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 608 big_endian_store_24(packet, pos, connection->company_id); 609 pos += 3; 610 packet[pos++] = connection->pdu_id; 611 packet[pos++] = connection->avrcp_packet_type; // reserved(upper 6) | AVRCP packet_type 612 big_endian_store_16(packet, pos, connection->data_len); // parameter length 613 pos += 2; 614 break; 615 case AVRCP_CMD_OPCODE_PASS_THROUGH: 616 packet[pos++] = connection->operation_id; 617 packet[pos++] = (uint8_t)connection->data_len; // parameter length 618 if ((connection->operation_id & 0x7F) != AVRCP_OPERATION_ID_VENDOR_UNIQUE){ 619 pos += 2; 620 } 621 break; 622 case AVRCP_CMD_OPCODE_UNIT_INFO: 623 case AVRCP_CMD_OPCODE_SUBUNIT_INFO: 624 break; 625 default: 626 btstack_assert(false); 627 return; 628 } 629 break; 630 case AVCTP_CONTINUE_PACKET: 631 case AVCTP_END_PACKET: 632 break; 633 default: 634 btstack_assert(false); 635 return; 636 } 637 // compare number of bytes to store with the remaining buffer size 638 uint16_t bytes_to_copy = btstack_min(connection->data_len - connection->data_offset, max_payload_size - pos); 639 640 (void)memcpy(packet + pos, &connection->data[connection->data_offset], bytes_to_copy); 641 pos += bytes_to_copy; 642 connection->data_offset += bytes_to_copy; 643 644 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 645 } 646 647 static int avrcp_send_register_notification(avrcp_connection_t * connection, uint8_t event_id){ 648 uint8_t command[18]; 649 uint16_t pos = 0; 650 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 651 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 652 command[pos++] = (connection->transaction_id << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 653 654 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 655 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 656 command[pos++] = AVRCP_CTYPE_NOTIFY; 657 command[pos++] = (AVRCP_SUBUNIT_TYPE_PANEL << 3) | AVRCP_SUBUNIT_ID; 658 command[pos++] = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 659 660 big_endian_store_24(command, pos, BT_SIG_COMPANY_ID); 661 pos += 3; 662 command[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 663 command[pos++] = 0; // reserved(upper 6) | packet_type -> 0 664 big_endian_store_16(command, pos, 5); // parameter length 665 pos += 2; 666 command[pos++] = event_id; 667 big_endian_store_32(command, pos, 1); // send notification on playback position every second, for other notifications it is ignored 668 pos += 4; 669 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 670 } 671 672 static void avrcp_press_and_hold_timeout_handler(btstack_timer_source_t * timer){ 673 UNUSED(timer); 674 avrcp_connection_t * connection = (avrcp_connection_t*) btstack_run_loop_get_timer_context(timer); 675 btstack_run_loop_set_timer(&connection->controller_press_and_hold_cmd_timer, 2000); // 2 seconds timeout 676 btstack_run_loop_add_timer(&connection->controller_press_and_hold_cmd_timer); 677 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 678 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 679 } 680 681 static void avrcp_press_and_hold_timer_start(avrcp_connection_t * connection){ 682 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 683 btstack_run_loop_set_timer_handler(&connection->controller_press_and_hold_cmd_timer, avrcp_press_and_hold_timeout_handler); 684 btstack_run_loop_set_timer_context(&connection->controller_press_and_hold_cmd_timer, connection); 685 btstack_run_loop_set_timer(&connection->controller_press_and_hold_cmd_timer, 2000); // 2 seconds timeout 686 btstack_run_loop_add_timer(&connection->controller_press_and_hold_cmd_timer); 687 } 688 689 static void avrcp_press_and_hold_timer_stop(avrcp_connection_t * connection){ 690 connection->controller_press_and_hold_cmd_active = false; 691 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 692 } 693 694 695 static uint8_t avrcp_controller_request_pass_through_release_control_cmd(avrcp_connection_t * connection){ 696 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 697 if (connection->controller_press_and_hold_cmd_active){ 698 avrcp_press_and_hold_timer_stop(connection); 699 } 700 connection->operation_id = (avrcp_operation_id_t)(0x80 | connection->operation_id); 701 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 702 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 703 return ERROR_CODE_SUCCESS; 704 } 705 706 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){ 707 UNUSED(playback_speed); 708 709 log_info("Send command %d", opid); 710 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 711 if (!connection){ 712 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 713 } 714 715 if (connection->state != AVCTP_CONNECTION_OPENED){ 716 log_error("Connection in wrong state %d, expected %d. avrcp cid 0x%02x", connection->state, AVCTP_CONNECTION_OPENED, avrcp_cid); 717 return ERROR_CODE_COMMAND_DISALLOWED; 718 } 719 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 720 avrcp_controller_pass_through_command_data_init(connection, opid); 721 722 connection->controller_press_and_hold_cmd_active = continuous_cmd; 723 if (connection->controller_press_and_hold_cmd_active){ 724 avrcp_press_and_hold_timer_start(connection); 725 } 726 727 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 728 return ERROR_CODE_SUCCESS; 729 } 730 731 static uint8_t request_single_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 732 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, false); 733 } 734 735 static uint8_t request_continuous_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 736 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, true); 737 } 738 739 static void avrcp_controller_get_capabilities_for_connection(avrcp_connection_t * connection, uint8_t capability_id){ 740 connection->state = AVCTP_W2_SEND_COMMAND; 741 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CAPABILITIES, true); 742 743 // Parameter Length 744 connection->data_len = 1; 745 connection->data[0] = capability_id; // capability ID 746 747 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 748 } 749 750 static uint8_t avrcp_controller_register_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 751 if ((connection->remote_capabilities_state == AVRCP_REMOTE_CAPABILITIES_KNOWN) && (connection->notifications_supported_by_target & (1 << event_id)) == 0){ 752 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 753 } 754 if ((connection->controller_notifications_to_deregister & (1 << event_id)) != 0){ 755 return ERROR_CODE_COMMAND_DISALLOWED; 756 } 757 if ( (connection->notifications_enabled & (1 << event_id)) != 0){ 758 return ERROR_CODE_SUCCESS; 759 } 760 connection->controller_notifications_to_register |= (1 << event_id); 761 762 switch (connection->remote_capabilities_state){ 763 case AVRCP_REMOTE_CAPABILITIES_NONE: 764 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_W4_QUERY_RESULT; 765 connection->controller_notifications_supported_by_target_suppress_emit_result = true; 766 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 767 break; 768 case AVRCP_REMOTE_CAPABILITIES_KNOWN: 769 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 770 break; 771 default: 772 break; 773 } 774 return ERROR_CODE_SUCCESS; 775 } 776 777 static uint8_t avrcp_controller_request_continuation(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id){ 778 connection->state = AVCTP_W2_SEND_COMMAND; 779 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, pdu_id, false); 780 781 // Parameter Length 782 connection->data_len = 3; 783 big_endian_store_16(connection->data, 0, 1); 784 connection->data[2] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 785 786 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 787 return ERROR_CODE_SUCCESS; 788 } 789 790 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 791 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE); 792 } 793 794 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 795 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE); 796 } 797 798 static void avrcp_controller_handle_notification(avrcp_connection_t *connection, avrcp_command_type_t ctype, uint8_t *payload, uint16_t size) { 799 if (size < 1) return; 800 uint16_t pos = 0; 801 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) payload[pos++]; 802 if ( (event_id < AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) || (event_id > AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 803 return; 804 } 805 806 uint16_t event_mask = (1 << event_id); 807 uint16_t reset_event_mask = ~event_mask; 808 809 switch (ctype){ 810 case AVRCP_CTYPE_RESPONSE_REJECTED: 811 connection->controller_notifications_to_deregister &= reset_event_mask; 812 connection->controller_notifications_to_register &= reset_event_mask; 813 connection->controller_initial_status_reported &= reset_event_mask; 814 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, event_id, false); 815 return; 816 817 case AVRCP_CTYPE_RESPONSE_INTERIM: 818 // register as enabled 819 connection->notifications_enabled |= event_mask; 820 821 // check if initial value is already sent 822 if ((connection->controller_initial_status_reported & event_mask) != 0 ){ 823 return; 824 } 825 // emit event only once, initially 826 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, true); 827 connection->controller_initial_status_reported |= event_mask; 828 // emit initial value after this switch 829 break; 830 831 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 832 // received change, event is considered de-registered 833 // we are re-enabling it automatically, if it is not 834 // explicitly disabled 835 connection->notifications_enabled &= reset_event_mask; 836 if ((connection->controller_notifications_to_deregister & event_mask) == 0){ 837 avrcp_controller_register_notification(connection, event_id); 838 } else { 839 connection->controller_notifications_to_deregister &= reset_event_mask; 840 connection->controller_notifications_to_register &= reset_event_mask; 841 connection->controller_initial_status_reported &= reset_event_mask; 842 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, false); 843 } 844 break; 845 846 default: 847 return; 848 } 849 850 avrcp_controller_emit_notification_for_event_id(connection->avrcp_cid, event_id, ctype, payload + pos, size - pos); 851 } 852 853 #ifdef ENABLE_AVCTP_FRAGMENTATION 854 static void avctp_reassemble_message(avrcp_connection_t * connection, avctp_packet_type_t packet_type, uint8_t *packet, uint16_t size){ 855 // after header (transaction label and packet type) 856 uint16_t pos; 857 uint16_t bytes_to_store; 858 859 switch (packet_type){ 860 case AVCTP_START_PACKET: 861 if (size < 2) return; 862 863 // store header 864 pos = 0; 865 connection->avctp_reassembly_buffer[pos] = packet[pos]; 866 pos++; 867 connection->avctp_reassembly_size = pos; 868 869 // NOTE: num packets not needed for reassembly, ignoring it does not pose security risk -> no need to store it 870 pos++; 871 872 // PID in reassembled packet is at offset 1, it will be read later after the avctp_reassemble_message with AVCTP_END_PACKET is called 873 874 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 875 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 876 connection->avctp_reassembly_size += bytes_to_store; 877 break; 878 879 case AVCTP_CONTINUE_PACKET: 880 case AVCTP_END_PACKET: 881 if (size < 1) return; 882 883 // store remaining data, ignore header 884 pos = 1; 885 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 886 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 887 connection->avctp_reassembly_size += bytes_to_store; 888 break; 889 890 default: 891 return; 892 } 893 } 894 #endif 895 896 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 897 if (size < 6u) return; 898 uint8_t pdu_id; 899 avrcp_packet_type_t vendor_dependent_avrcp_packet_type; 900 901 uint16_t pos = 0; 902 connection->controller_last_confirmed_transaction_id = packet[pos] >> 4; 903 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((packet[pos] >> 1) & 0x01); 904 avctp_packet_type_t packet_type = (avctp_packet_type_t)((packet[pos] >> 2) & 0x03); 905 pos++; 906 907 if (frame_type != AVRCP_RESPONSE_FRAME) return; 908 909 switch (packet_type){ 910 case AVCTP_SINGLE_PACKET: 911 break; 912 913 #ifdef ENABLE_AVCTP_FRAGMENTATION 914 case AVCTP_START_PACKET: 915 case AVCTP_CONTINUE_PACKET: 916 avctp_reassemble_message(connection, packet_type, packet, size); 917 return; 918 919 case AVCTP_END_PACKET: 920 avctp_reassemble_message(connection, packet_type, packet, size); 921 922 packet = connection->avctp_reassembly_buffer; 923 size = connection->avctp_reassembly_size; 924 break; 925 #endif 926 927 default: 928 return; 929 } 930 931 pos += 2; // PID 932 933 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 934 935 #ifdef ENABLE_LOG_INFO 936 uint8_t byte_value = packet[pos]; 937 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 938 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 939 #endif 940 pos++; 941 942 uint8_t opcode = packet[pos++]; 943 uint16_t param_length; 944 945 switch (opcode){ 946 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 947 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 948 connection->state = AVCTP_CONNECTION_OPENED; 949 950 #ifdef ENABLE_LOG_INFO 951 // page, extension code (1) 952 pos++; 953 uint8_t unit_type = packet[pos] >> 3; 954 uint8_t max_subunit_ID = packet[pos] & 0x07; 955 log_info("SUBUNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), target_unit_type 0x%02x, max_subunit_ID %d", ctype, subunit_type, subunit_id, opcode, unit_type, max_subunit_ID); 956 #endif 957 break; 958 } 959 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 960 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 961 connection->state = AVCTP_CONNECTION_OPENED; 962 963 #ifdef ENABLE_LOG_INFO 964 // byte value 7 (1) 965 pos++; 966 uint8_t unit_type = packet[pos] >> 3; 967 uint8_t unit = packet[pos] & 0x07; 968 pos++; 969 uint32_t company_id = big_endian_read_24(packet, pos); 970 log_info("UNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), target_unit_type 0x%02x, unit %d, company_id 0x%06" PRIx32, 971 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 972 #endif 973 break; 974 } 975 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 976 if ((size - pos) < 7){ 977 return; 978 } 979 // Company ID (3) 980 pos += 3; 981 pdu_id = packet[pos++]; 982 vendor_dependent_avrcp_packet_type = (avrcp_packet_type_t)(packet[pos++] & 0x03); 983 param_length = big_endian_read_16(packet, pos); 984 pos += 2; 985 986 if ((size - pos) < param_length) { 987 return; 988 } 989 990 // handle asynchronous notifications, without changing state 991 if (pdu_id == AVRCP_PDU_ID_REGISTER_NOTIFICATION){ 992 avrcp_controller_handle_notification(connection, ctype, packet + pos, size - pos); 993 break; 994 } 995 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 996 connection->state = AVCTP_CONNECTION_OPENED; 997 998 log_info("VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 999 switch (pdu_id){ 1000 case AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE:{ 1001 uint8_t num_attributes = packet[pos++]; 1002 int i; 1003 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 1004 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 1005 for (i = 0; i < num_attributes; i++){ 1006 uint8_t attribute_id = packet[pos++]; 1007 uint8_t value = packet[pos++]; 1008 switch (attribute_id){ 1009 case 0x02: 1010 repeat_mode = (avrcp_repeat_mode_t) value; 1011 break; 1012 case 0x03: 1013 shuffle_mode = (avrcp_shuffle_mode_t) value; 1014 break; 1015 default: 1016 break; 1017 } 1018 } 1019 avrcp_controller_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 1020 break; 1021 } 1022 1023 case AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE:{ 1024 uint16_t offset = 0; 1025 uint8_t event[6]; 1026 event[offset++] = HCI_EVENT_AVRCP_META; 1027 event[offset++] = sizeof(event) - 2; 1028 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 1029 little_endian_store_16(event, offset, connection->avrcp_cid); 1030 offset += 2; 1031 event[offset++] = ctype; 1032 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1033 break; 1034 } 1035 1036 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 1037 uint16_t offset = 0; 1038 uint8_t event[7]; 1039 event[offset++] = HCI_EVENT_AVRCP_META; 1040 event[offset++] = sizeof(event) - 2; 1041 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 1042 little_endian_store_16(event, offset, connection->avrcp_cid); 1043 offset += 2; 1044 event[offset++] = ctype; 1045 event[offset++] = packet[pos++]; 1046 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1047 break; 1048 } 1049 1050 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 1051 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 1052 uint8_t capability_count = 0; 1053 if (param_length > 1){ 1054 capability_count = packet[pos++]; 1055 } 1056 uint16_t i; 1057 uint16_t offset; 1058 uint8_t event[10]; 1059 1060 switch (capability_id){ 1061 1062 case AVRCP_CAPABILITY_ID_COMPANY: 1063 for (i = 0; (i < capability_count) && ((size - pos) >= 3); i++){ 1064 uint32_t company_id = big_endian_read_24(packet, pos); 1065 pos += 3; 1066 log_info(" 0x%06" PRIx32 ", ", company_id); 1067 1068 offset = 0; 1069 event[offset++] = HCI_EVENT_AVRCP_META; 1070 event[offset++] = sizeof(event) - 2; 1071 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID; 1072 little_endian_store_16(event, offset, connection->avrcp_cid); 1073 offset += 2; 1074 event[offset++] = ctype; 1075 event[offset++] = 0; 1076 little_endian_store_24(event, offset, company_id); 1077 offset += 3; 1078 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1079 } 1080 1081 offset = 0; 1082 event[offset++] = HCI_EVENT_AVRCP_META; 1083 event[offset++] = sizeof(event) - 2; 1084 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID_DONE; 1085 little_endian_store_16(event, offset, connection->avrcp_cid); 1086 offset += 2; 1087 event[offset++] = ctype; 1088 event[offset++] = 0; 1089 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1090 break; 1091 1092 case AVRCP_CAPABILITY_ID_EVENT: 1093 for (i = 0; (i < capability_count) && ((size - pos) >= 1); i++){ 1094 uint8_t event_id = packet[pos++]; 1095 connection->notifications_supported_by_target |= (1 << event_id); 1096 } 1097 1098 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_KNOWN; 1099 1100 // if the get supported events query is triggered by avrcp_controller_enable_notification call, 1101 // avrcp_controller_emit_supported_events should be suppressed 1102 if (connection->controller_notifications_supported_by_target_suppress_emit_result){ 1103 connection->controller_notifications_supported_by_target_suppress_emit_result = false; 1104 // also, notification might not be supported 1105 // if so, emit AVRCP_SUBEVENT_ENABLE_NOTIFICATION_COMPLETE event to app, 1106 // and update controller_notifications_to_register bitmap 1107 for (i = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; i < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; i++){ 1108 if ((connection->controller_notifications_to_register & (1 << i)) != 0){ 1109 if ((connection->notifications_supported_by_target & (1 << i)) == 0){ 1110 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, (uint8_t) i, false); 1111 connection->controller_notifications_to_register &= ~(1 << i); 1112 } 1113 } 1114 } 1115 break; 1116 } 1117 // supported events are emitted only if the get supported events query 1118 // is triggered by avrcp_controller_get_supported_events call 1119 avrcp_controller_emit_supported_events(connection); 1120 break; 1121 1122 default: 1123 // ignore 1124 break; 1125 } 1126 break; 1127 } 1128 1129 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 1130 uint32_t song_length = big_endian_read_32(packet, pos); 1131 pos += 4; 1132 uint32_t song_position = big_endian_read_32(packet, pos); 1133 pos += 4; 1134 uint8_t play_status = packet[pos]; 1135 1136 uint8_t event[15]; 1137 int offset = 0; 1138 event[offset++] = HCI_EVENT_AVRCP_META; 1139 event[offset++] = sizeof(event) - 2; 1140 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 1141 little_endian_store_16(event, offset, connection->avrcp_cid); 1142 offset += 2; 1143 event[offset++] = ctype; 1144 little_endian_store_32(event, offset, song_length); 1145 offset += 4; 1146 little_endian_store_32(event, offset, song_position); 1147 offset += 4; 1148 event[offset++] = play_status; 1149 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1150 break; 1151 } 1152 1153 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES: 1154 switch (vendor_dependent_avrcp_packet_type){ 1155 case AVRCP_START_PACKET: 1156 case AVRCP_SINGLE_PACKET: 1157 avrcp_parser_reset(connection); 1158 connection->list_size = param_length; 1159 // num_attributes 1160 pos++; 1161 1162 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1163 if (vendor_dependent_avrcp_packet_type == AVRCP_START_PACKET){ 1164 avrcp_controller_request_continue_response(connection); 1165 return; 1166 } 1167 break; 1168 case AVRCP_CONTINUE_PACKET: 1169 case AVRCP_END_PACKET: 1170 connection->controller_num_received_fragments++; 1171 1172 if (connection->controller_num_received_fragments < connection->controller_max_num_fragments){ 1173 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1174 1175 if (vendor_dependent_avrcp_packet_type == AVRCP_CONTINUE_PACKET){ 1176 avrcp_controller_request_continue_response(connection); 1177 return; 1178 } 1179 } else { 1180 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 1181 avrcp_parser_reset(connection); 1182 avrcp_controller_request_abort_continuation(connection); 1183 return; 1184 } 1185 break; 1186 default: 1187 btstack_assert(false); 1188 break; 1189 } 1190 break; 1191 1192 default: 1193 // custom command response comes here 1194 switch (pdu_id){ 1195 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 1196 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 1197 break; 1198 default: 1199 if (pdu_id != connection->pdu_id) { 1200 break; 1201 } 1202 uint8_t *in_place_buffer = packet + pos - 9; 1203 avrcp_controller_prepare_custom_command_response(connection, param_length, 1204 in_place_buffer); 1205 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, in_place_buffer, 1206 param_length + 9); 1207 1208 break; 1209 } 1210 break; 1211 } 1212 break; 1213 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 1214 if ((size - pos) < 1) return; 1215 uint8_t operation_id = packet[pos++]; 1216 UNUSED(pos); 1217 switch (connection->state){ 1218 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1219 // trigger release for simple command: 1220 if (!connection->controller_press_and_hold_cmd_active){ 1221 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1222 break; 1223 } 1224 // for press and hold, send release if it just has been requested, otherwise, wait for next repeat 1225 if (connection->controller_press_and_hold_cmd_release){ 1226 connection->controller_press_and_hold_cmd_release = false; 1227 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1228 } else { 1229 connection->state = AVCTP_W4_STOP; 1230 } 1231 break; 1232 case AVCTP_W2_RECEIVE_RESPONSE: 1233 connection->state = AVCTP_CONNECTION_OPENED; 1234 break; 1235 default: 1236 break; 1237 } 1238 if (connection->state == AVCTP_W4_STOP){ 1239 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 1240 } 1241 if (connection->state == AVCTP_CONNECTION_OPENED) { 1242 // RELEASE response 1243 operation_id = operation_id & 0x7F; 1244 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 1245 } 1246 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 1247 // PRESS response 1248 avrcp_controller_request_pass_through_release_control_cmd(connection); 1249 } 1250 break; 1251 } 1252 default: 1253 break; 1254 } 1255 1256 // trigger pending notification reqistrations 1257 if ((connection->state == AVCTP_CONNECTION_OPENED) && connection->controller_notifications_to_register){ 1258 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1259 } 1260 } 1261 1262 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 1263 // identifier (9) + num attributes (1) + attributes (4 * num attributes) 1264 uint8_t get_element_attributes_command[9+8*((AVRCP_MEDIA_ATTR_RESERVED-AVRCP_MEDIA_ATTR_TITLE) + 1)]; 1265 uint16_t pos; 1266 uint16_t num_attributes_index; 1267 uint8_t i; 1268 1269 switch (connection->state){ 1270 case AVCTP_W2_SEND_PRESS_COMMAND: 1271 avrcp_send_cmd_with_avctp_fragmentation(connection); 1272 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 1273 return; 1274 1275 case AVCTP_W2_SEND_RELEASE_COMMAND: 1276 avrcp_send_cmd_with_avctp_fragmentation(connection); 1277 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1278 return; 1279 1280 case AVCTP_W2_SEND_COMMAND: 1281 avrcp_send_cmd_with_avctp_fragmentation(connection); 1282 if (connection->data_offset < connection->data_len){ 1283 // continue AVCTP fragmentation 1284 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1285 return; 1286 } 1287 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1288 return; 1289 case AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST: 1290 // build command in local buffer 1291 pos = 0; 1292 connection->data = get_element_attributes_command; 1293 // write identifier 1294 memset(connection->data, 0, 8); 1295 pos += 8; 1296 num_attributes_index = pos; 1297 // If num_attributes is set to zero, all attribute information shall be returned, 1298 // and the AttributeID field is omitted 1299 connection->data[num_attributes_index] = 0; 1300 pos++; 1301 for (i = 0; i < (uint8_t)AVRCP_MEDIA_ATTR_RESERVED - (uint8_t)AVRCP_MEDIA_ATTR_TITLE; i++){ 1302 if ((connection->controller_element_attributes & (1<<i)) != 0){ 1303 // every attribute is 4 bytes long 1304 big_endian_store_32(connection->data, pos, AVRCP_MEDIA_ATTR_TITLE + i); 1305 pos += 4; 1306 connection->data[num_attributes_index]++; 1307 } 1308 } 1309 1310 // Parameter Length 1311 connection->data_len = pos; 1312 1313 log_info("AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST, len %u", connection->data_len); 1314 1315 // send data - assume it will fit into one packet 1316 avrcp_send_cmd_with_avctp_fragmentation(connection); 1317 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1318 return; 1319 default: 1320 break; 1321 } 1322 1323 // send register notification if queued, 1324 // avrcp_handle_l2cap_data_packet_for_signaling_connection will trigger next one 1325 if (connection->controller_notifications_to_register != 0){ 1326 uint8_t event_id; 1327 for (event_id = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t)AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 1328 if (connection->controller_notifications_to_register & (1 << event_id)){ 1329 connection->controller_notifications_to_register &= ~ (1 << event_id); 1330 avrcp_send_register_notification(connection, event_id); 1331 return; 1332 } 1333 } 1334 } 1335 } 1336 1337 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1338 avrcp_connection_t * connection; 1339 1340 switch (packet_type) { 1341 case L2CAP_DATA_PACKET: 1342 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1343 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1344 break; 1345 1346 case HCI_EVENT_PACKET: 1347 switch (hci_event_packet_get_type(packet)){ 1348 case L2CAP_EVENT_CAN_SEND_NOW: 1349 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1350 avrcp_controller_handle_can_send_now(connection); 1351 break; 1352 default: 1353 break; 1354 } 1355 default: 1356 break; 1357 } 1358 } 1359 1360 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){ 1361 if (service_name == NULL){ 1362 service_name = avrcp_default_controller_service_name; 1363 } 1364 if (service_provider_name == NULL){ 1365 service_provider_name = avrcp_default_controller_service_provider_name; 1366 } 1367 avrcp_create_sdp_record(true, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 1368 } 1369 1370 void avrcp_controller_init(void){ 1371 avrcp_controller_context.role = AVRCP_CONTROLLER; 1372 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 1373 avrcp_register_controller_packet_handler(&avrcp_controller_packet_handler); 1374 } 1375 1376 void avrcp_controller_deinit(void){ 1377 memset(&avrcp_controller_context, 0, sizeof(avrcp_context_t)); 1378 } 1379 1380 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 1381 btstack_assert(callback != NULL); 1382 avrcp_controller_context.avrcp_callback = callback; 1383 } 1384 1385 1386 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 1387 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1388 } 1389 1390 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 1391 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1392 } 1393 1394 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 1395 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1396 } 1397 1398 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 1399 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1400 } 1401 1402 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 1403 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1404 } 1405 1406 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 1407 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1408 } 1409 1410 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1411 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1412 } 1413 1414 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1415 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1416 } 1417 1418 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1419 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1420 } 1421 1422 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1423 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1424 } 1425 1426 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1427 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1428 } 1429 1430 /* start continuous cmds */ 1431 1432 uint8_t avrcp_controller_start_press_and_hold_cmd(uint16_t avrcp_cid, avrcp_operation_id_t operation_id){ 1433 return request_continuous_pass_through_press_control_cmd(avrcp_cid, operation_id, 0); 1434 } 1435 1436 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1437 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1438 } 1439 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1440 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1441 } 1442 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1443 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1444 } 1445 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1446 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1447 } 1448 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1449 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1450 } 1451 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1452 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1453 } 1454 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1455 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1456 } 1457 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1458 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1459 } 1460 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1461 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1462 } 1463 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1464 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1465 } 1466 1467 static uint8_t avrcp_controller_request_group_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_group_operation_id_t opid){ 1468 log_info("Send group command %d", opid); 1469 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1470 if (!connection){ 1471 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1472 } 1473 1474 if (connection->state != AVCTP_CONNECTION_OPENED){ 1475 log_error("Connection in wrong state %d, expected %d. avrcp cid 0x%02x", connection->state, AVCTP_CONNECTION_OPENED, avrcp_cid); 1476 return ERROR_CODE_COMMAND_DISALLOWED; 1477 } 1478 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 1479 avrcp_controller_pass_through_command_data_init(connection, AVRCP_OPERATION_ID_VENDOR_UNIQUE); 1480 connection->company_id = BT_SIG_COMPANY_ID; 1481 connection->data_len = 5; 1482 big_endian_store_24(connection->data, 0, BT_SIG_COMPANY_ID); 1483 big_endian_store_16(connection->data, 3, opid); 1484 1485 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1486 return ERROR_CODE_SUCCESS; 1487 } 1488 1489 uint8_t avrcp_controller_next_group(uint16_t avrcp_cid){ 1490 return avrcp_controller_request_group_pass_through_press_control_cmd(avrcp_cid, AVRCP_GROUP_OPERATION_ID_GOTO_NEXT); 1491 } 1492 1493 uint8_t avrcp_controller_previous_group(uint16_t avrcp_cid){ 1494 return avrcp_controller_request_group_pass_through_press_control_cmd(avrcp_cid, AVRCP_GROUP_OPERATION_ID_GOTO_PREVIOUS); 1495 } 1496 1497 1498 /* stop continuous cmds */ 1499 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1500 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1501 if (!connection){ 1502 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1503 } 1504 1505 switch (connection->state){ 1506 // respond when we receive response for (repeated) press command 1507 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1508 connection->controller_press_and_hold_cmd_release = true; 1509 break; 1510 1511 // release already sent or on the way, nothing to do 1512 case AVCTP_W2_RECEIVE_RESPONSE: 1513 case AVCTP_W2_SEND_RELEASE_COMMAND: 1514 break; 1515 1516 // about to send next repeated press command or wait for it -> release right away 1517 case AVCTP_W2_SEND_PRESS_COMMAND: 1518 case AVCTP_W4_STOP: 1519 return avrcp_controller_request_pass_through_release_control_cmd(connection); 1520 1521 // otherwise reject request 1522 default: 1523 return ERROR_CODE_COMMAND_DISALLOWED; 1524 } 1525 return ERROR_CODE_SUCCESS; 1526 } 1527 1528 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1529 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1530 if (!connection){ 1531 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1532 } 1533 return avrcp_controller_register_notification(connection, event_id); 1534 } 1535 1536 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1537 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1538 if (!connection){ 1539 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1540 } 1541 if (connection->remote_capabilities_state != AVRCP_REMOTE_CAPABILITIES_KNOWN){ 1542 return ERROR_CODE_COMMAND_DISALLOWED; 1543 } 1544 1545 if ((connection->notifications_supported_by_target & (1 << event_id)) == 0){ 1546 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1547 } 1548 1549 if ((connection->notifications_enabled & (1 << event_id)) == 0){ 1550 return ERROR_CODE_SUCCESS; 1551 } 1552 1553 connection->controller_notifications_to_deregister |= (1 << event_id); 1554 return ERROR_CODE_SUCCESS; 1555 } 1556 1557 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 1558 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1559 if (!connection){ 1560 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1561 } 1562 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1563 1564 connection->state = AVCTP_W2_SEND_COMMAND; 1565 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_UNIT_INFO, AVRCP_CTYPE_STATUS, 1566 AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, AVRCP_PDU_ID_UNDEFINED, 1567 0); 1568 1569 connection->data = connection->message_body; 1570 memset(connection->data, 0xFF, 5); 1571 connection->data_len = 5; 1572 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1573 return ERROR_CODE_SUCCESS; 1574 } 1575 1576 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 1577 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1578 if (!connection){ 1579 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1580 } 1581 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1582 1583 connection->state = AVCTP_W2_SEND_COMMAND; 1584 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_SUBUNIT_INFO, AVRCP_CTYPE_STATUS, 1585 AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, AVRCP_PDU_ID_UNDEFINED, 1586 0); 1587 1588 connection->data = connection->message_body; 1589 memset(connection->data, 0xFF, 5); 1590 connection->data[0] = 7; // page: 0, extension_code: 7 1591 connection->data_len = 5; 1592 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1593 return ERROR_CODE_SUCCESS; 1594 } 1595 1596 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 1597 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1598 if (!connection){ 1599 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1600 } 1601 if (connection->state != AVCTP_CONNECTION_OPENED){ 1602 return ERROR_CODE_COMMAND_DISALLOWED; 1603 } 1604 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_COMPANY); 1605 return ERROR_CODE_SUCCESS; 1606 } 1607 1608 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 1609 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1610 if (!connection){ 1611 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1612 } 1613 if (connection->state != AVCTP_CONNECTION_OPENED){ 1614 return ERROR_CODE_COMMAND_DISALLOWED; 1615 } 1616 1617 switch (connection->remote_capabilities_state){ 1618 case AVRCP_REMOTE_CAPABILITIES_NONE: 1619 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_W4_QUERY_RESULT; 1620 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 1621 break; 1622 case AVRCP_REMOTE_CAPABILITIES_KNOWN: 1623 avrcp_controller_emit_supported_events(connection); 1624 break; 1625 default: 1626 break; 1627 } 1628 return ERROR_CODE_SUCCESS; 1629 } 1630 1631 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1632 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1633 if (!connection){ 1634 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1635 } 1636 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1637 1638 connection->state = AVCTP_W2_SEND_COMMAND; 1639 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_PLAY_STATUS, true); 1640 1641 connection->data_len = 0; 1642 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1643 return ERROR_CODE_SUCCESS; 1644 } 1645 1646 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1647 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1648 if (!connection){ 1649 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1650 } 1651 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1652 1653 connection->state = AVCTP_W2_SEND_COMMAND; 1654 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ADDRESSED_PLAYER, true); 1655 1656 connection->data_len = 2; 1657 big_endian_store_16(connection->data, 0, addressed_player_id); 1658 1659 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1660 return ERROR_CODE_SUCCESS; 1661 } 1662 1663 uint8_t avrcp_controller_get_element_attributes(uint16_t avrcp_cid, uint8_t num_attributes, avrcp_media_attribute_id_t * attributes){ 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 1669 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1670 1671 if (num_attributes >= AVRCP_MEDIA_ATTR_RESERVED) { 1672 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 1673 } 1674 1675 connection->state = AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST; 1676 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES, true); 1677 1678 // collect element attributes 1679 uint8_t i; 1680 uint16_t attributes_set = 0; 1681 for (i = 0; i < num_attributes; i++){ 1682 // ignore invalid attribute ID and "get all attributes" 1683 if (AVRCP_MEDIA_ATTR_ALL < attributes[i] && attributes[i] < AVRCP_MEDIA_ATTR_RESERVED){ 1684 attributes_set |= 1 << (attributes[i] - AVRCP_MEDIA_ATTR_TITLE); 1685 } 1686 } 1687 connection->controller_element_attributes = attributes_set; 1688 1689 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1690 return ERROR_CODE_SUCCESS; 1691 } 1692 1693 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1694 return avrcp_controller_get_element_attributes(avrcp_cid, 0, NULL); 1695 } 1696 1697 uint8_t avrcp_controller_get_now_playing_info_for_media_attribute_id(uint16_t avrcp_cid, avrcp_media_attribute_id_t media_attribute_id){ 1698 if (media_attribute_id == AVRCP_MEDIA_ATTR_ALL){ 1699 return avrcp_controller_get_now_playing_info(avrcp_cid); 1700 } 1701 avrcp_media_attribute_id_t media_attrs[1]; 1702 media_attrs[0] = media_attribute_id; 1703 return avrcp_controller_get_element_attributes(avrcp_cid, 1, media_attrs); 1704 } 1705 1706 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1707 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1708 if (!connection){ 1709 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1710 } 1711 1712 // 1713 // allow sending of multiple set abs volume commands without waiting for response 1714 // 1715 uint8_t status = ERROR_CODE_COMMAND_DISALLOWED; 1716 switch (connection->state){ 1717 case AVCTP_CONNECTION_OPENED: 1718 status = ERROR_CODE_SUCCESS; 1719 break; 1720 case AVCTP_W2_RECEIVE_RESPONSE: 1721 // - is pending response also set abs volume 1722 if (connection->command_opcode != AVRCP_CMD_OPCODE_VENDOR_DEPENDENT) break; 1723 if (connection->command_type != AVRCP_CTYPE_CONTROL) break; 1724 if (connection->subunit_type != AVRCP_SUBUNIT_TYPE_PANEL) break; 1725 if (connection->subunit_id != AVRCP_SUBUNIT_ID) break; 1726 if (connection->pdu_id != AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME) break; 1727 // - is next transaction id valid in window 1728 if (avrcp_controller_is_transaction_id_valid(connection, avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter)) == false) break; 1729 status = ERROR_CODE_SUCCESS; 1730 break; 1731 default: 1732 break; 1733 } 1734 if (status != ERROR_CODE_SUCCESS) return status; 1735 1736 connection->state = AVCTP_W2_SEND_COMMAND; 1737 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME, true); 1738 1739 // Parameter Length 1740 connection->data_len = 1; 1741 connection->data[0] = volume; 1742 1743 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1744 return ERROR_CODE_SUCCESS; 1745 } 1746 1747 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 1748 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1749 if (!connection){ 1750 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1751 } 1752 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1753 1754 connection->state = AVCTP_W2_SEND_COMMAND; 1755 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE, true); 1756 1757 connection->data_len = 5; 1758 connection->data[0] = 4; // NumPlayerApplicationSettingAttributeID 1759 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1760 connection->data[1] = 0x01; // equalizer (1-OFF, 2-ON) 1761 connection->data[2] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1762 connection->data[3] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1763 connection->data[4] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1764 1765 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1766 return ERROR_CODE_SUCCESS; 1767 } 1768 1769 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1770 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1771 if (!connection){ 1772 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1773 } 1774 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1775 1776 connection->state = AVCTP_W2_SEND_COMMAND; 1777 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE, true); 1778 1779 // Parameter Length 1780 connection->data_len = 3; 1781 connection->data[0] = 2; 1782 connection->data[1] = attr_id; 1783 connection->data[2] = attr_value; 1784 1785 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1786 return ERROR_CODE_SUCCESS; 1787 } 1788 1789 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1790 if ((mode < AVRCP_SHUFFLE_MODE_OFF) || (mode > AVRCP_SHUFFLE_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1791 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1792 } 1793 1794 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1795 if ((mode < AVRCP_REPEAT_MODE_OFF) || (mode > AVRCP_REPEAT_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1796 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1797 } 1798 1799 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1800 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1801 if (!connection){ 1802 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1803 } 1804 if (connection->state != AVCTP_CONNECTION_OPENED){ 1805 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1806 return ERROR_CODE_COMMAND_DISALLOWED; 1807 } 1808 connection->state = AVCTP_W2_SEND_COMMAND; 1809 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_PLAY_ITEM, true); 1810 1811 // Parameter Length 1812 connection->data_len = 11; 1813 connection->data[0] = scope; 1814 memset(&connection->data[1], 0, 8); 1815 if (uid){ 1816 (void)memcpy(&connection->data[1], uid, 8); 1817 } 1818 big_endian_store_16(connection->data, 9, uid_counter); 1819 1820 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1821 return ERROR_CODE_SUCCESS; 1822 } 1823 1824 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){ 1825 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1826 if (!connection){ 1827 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1828 } 1829 if (connection->state != AVCTP_CONNECTION_OPENED){ 1830 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1831 return ERROR_CODE_COMMAND_DISALLOWED; 1832 } 1833 1834 connection->state = AVCTP_W2_SEND_COMMAND; 1835 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_ADD_TO_NOW_PLAYING, true); 1836 1837 // Parameter Length 1838 connection->data_len = 11; 1839 connection->data[0] = scope; 1840 memset(&connection->data[1], 0, 8); 1841 if (uid){ 1842 (void)memcpy(&connection->data[1], uid, 8); 1843 } 1844 big_endian_store_16(connection->data, 9, uid_counter); 1845 1846 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1847 return ERROR_CODE_SUCCESS; 1848 } 1849 1850 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1851 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1852 if (!connection){ 1853 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1854 } 1855 connection->controller_max_num_fragments = max_num_fragments; 1856 return ERROR_CODE_SUCCESS; 1857 } 1858 1859 1860 uint8_t avrcp_controller_send_custom_command(uint16_t avrcp_cid, 1861 avrcp_command_type_t command_type, 1862 avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 1863 avrcp_pdu_id_t pdu_id, uint32_t company_id, 1864 const uint8_t * data, uint16_t data_len){ 1865 1866 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1867 if (!connection){ 1868 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1869 } 1870 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1871 1872 connection->state = AVCTP_W2_SEND_COMMAND; 1873 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_VENDOR_DEPENDENT, command_type, subunit_type, 1874 subunit_id, pdu_id, company_id); 1875 1876 connection->data = (uint8_t *)data; 1877 connection->data_len = data_len; 1878 1879 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1880 return ERROR_CODE_SUCCESS; 1881 } 1882 1883 uint8_t avrcp_controller_force_send_press_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid){ 1884 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1885 if (!connection){ 1886 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1887 } 1888 if (connection->state < AVCTP_CONNECTION_OPENED){ 1889 return ERROR_CODE_COMMAND_DISALLOWED; 1890 } 1891 1892 connection->state = AVCTP_W2_SEND_COMMAND; 1893 avrcp_controller_pass_through_command_data_init(connection, opid); 1894 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1895 return ERROR_CODE_SUCCESS; 1896 }