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 pos += 2; 619 break; 620 case AVRCP_CMD_OPCODE_UNIT_INFO: 621 case AVRCP_CMD_OPCODE_SUBUNIT_INFO: 622 break; 623 default: 624 btstack_assert(false); 625 return; 626 } 627 break; 628 case AVCTP_CONTINUE_PACKET: 629 case AVCTP_END_PACKET: 630 break; 631 default: 632 btstack_assert(false); 633 return; 634 } 635 // compare number of bytes to store with the remaining buffer size 636 uint16_t bytes_to_copy = btstack_min(connection->data_len - connection->data_offset, max_payload_size - pos); 637 638 (void)memcpy(packet + pos, &connection->data[connection->data_offset], bytes_to_copy); 639 pos += bytes_to_copy; 640 connection->data_offset += bytes_to_copy; 641 642 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 643 } 644 645 static int avrcp_send_register_notification(avrcp_connection_t * connection, uint8_t event_id){ 646 uint8_t command[18]; 647 uint16_t pos = 0; 648 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 649 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 650 command[pos++] = (connection->transaction_id << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 651 652 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 653 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 654 command[pos++] = AVRCP_CTYPE_NOTIFY; 655 command[pos++] = (AVRCP_SUBUNIT_TYPE_PANEL << 3) | AVRCP_SUBUNIT_ID; 656 command[pos++] = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 657 658 big_endian_store_24(command, pos, BT_SIG_COMPANY_ID); 659 pos += 3; 660 command[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 661 command[pos++] = 0; // reserved(upper 6) | packet_type -> 0 662 big_endian_store_16(command, pos, 5); // parameter length 663 pos += 2; 664 command[pos++] = event_id; 665 big_endian_store_32(command, pos, 1); // send notification on playback position every second, for other notifications it is ignored 666 pos += 4; 667 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 668 } 669 670 static void avrcp_press_and_hold_timeout_handler(btstack_timer_source_t * timer){ 671 UNUSED(timer); 672 avrcp_connection_t * connection = (avrcp_connection_t*) btstack_run_loop_get_timer_context(timer); 673 btstack_run_loop_set_timer(&connection->controller_press_and_hold_cmd_timer, 2000); // 2 seconds timeout 674 btstack_run_loop_add_timer(&connection->controller_press_and_hold_cmd_timer); 675 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 676 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 677 } 678 679 static void avrcp_press_and_hold_timer_start(avrcp_connection_t * connection){ 680 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 681 btstack_run_loop_set_timer_handler(&connection->controller_press_and_hold_cmd_timer, avrcp_press_and_hold_timeout_handler); 682 btstack_run_loop_set_timer_context(&connection->controller_press_and_hold_cmd_timer, connection); 683 btstack_run_loop_set_timer(&connection->controller_press_and_hold_cmd_timer, 2000); // 2 seconds timeout 684 btstack_run_loop_add_timer(&connection->controller_press_and_hold_cmd_timer); 685 } 686 687 static void avrcp_press_and_hold_timer_stop(avrcp_connection_t * connection){ 688 connection->controller_press_and_hold_cmd_active = false; 689 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 690 } 691 692 693 static uint8_t avrcp_controller_request_pass_through_release_control_cmd(avrcp_connection_t * connection){ 694 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 695 if (connection->controller_press_and_hold_cmd_active){ 696 avrcp_press_and_hold_timer_stop(connection); 697 } 698 connection->operation_id = (avrcp_operation_id_t)(0x80 | connection->operation_id); 699 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 700 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 701 return ERROR_CODE_SUCCESS; 702 } 703 704 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){ 705 UNUSED(playback_speed); 706 707 log_info("Send command %d", opid); 708 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 709 if (!connection){ 710 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 711 } 712 713 if (connection->state != AVCTP_CONNECTION_OPENED){ 714 log_error("Connection in wrong state %d, expected %d. avrcp cid 0x%02x", connection->state, AVCTP_CONNECTION_OPENED, avrcp_cid); 715 return ERROR_CODE_COMMAND_DISALLOWED; 716 } 717 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 718 avrcp_controller_pass_through_command_data_init(connection, opid); 719 720 connection->controller_press_and_hold_cmd_active = continuous_cmd; 721 if (connection->controller_press_and_hold_cmd_active){ 722 avrcp_press_and_hold_timer_start(connection); 723 } 724 725 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 726 return ERROR_CODE_SUCCESS; 727 } 728 729 static uint8_t request_single_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 730 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, false); 731 } 732 733 static uint8_t request_continuous_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 734 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, true); 735 } 736 737 static void avrcp_controller_get_capabilities_for_connection(avrcp_connection_t * connection, uint8_t capability_id){ 738 connection->state = AVCTP_W2_SEND_COMMAND; 739 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CAPABILITIES, true); 740 741 // Parameter Length 742 connection->data_len = 1; 743 connection->data[0] = capability_id; // capability ID 744 745 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 746 } 747 748 static uint8_t avrcp_controller_register_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 749 if ((connection->remote_capabilities_state == AVRCP_REMOTE_CAPABILITIES_KNOWN) && (connection->notifications_supported_by_target & (1 << event_id)) == 0){ 750 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 751 } 752 if ((connection->controller_notifications_to_deregister & (1 << event_id)) != 0){ 753 return ERROR_CODE_COMMAND_DISALLOWED; 754 } 755 if ( (connection->notifications_enabled & (1 << event_id)) != 0){ 756 return ERROR_CODE_SUCCESS; 757 } 758 connection->controller_notifications_to_register |= (1 << event_id); 759 760 switch (connection->remote_capabilities_state){ 761 case AVRCP_REMOTE_CAPABILITIES_NONE: 762 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_W4_QUERY_RESULT; 763 connection->controller_notifications_supported_by_target_suppress_emit_result = true; 764 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 765 break; 766 case AVRCP_REMOTE_CAPABILITIES_KNOWN: 767 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 768 break; 769 default: 770 break; 771 } 772 return ERROR_CODE_SUCCESS; 773 } 774 775 static uint8_t avrcp_controller_request_continuation(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id){ 776 connection->state = AVCTP_W2_SEND_COMMAND; 777 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, pdu_id, false); 778 779 // Parameter Length 780 connection->data_len = 3; 781 big_endian_store_16(connection->data, 0, 1); 782 connection->data[2] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 783 784 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 785 return ERROR_CODE_SUCCESS; 786 } 787 788 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 789 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE); 790 } 791 792 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 793 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE); 794 } 795 796 static void avrcp_controller_handle_notification(avrcp_connection_t *connection, avrcp_command_type_t ctype, uint8_t *payload, uint16_t size) { 797 if (size < 1) return; 798 uint16_t pos = 0; 799 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) payload[pos++]; 800 if ( (event_id < AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) || (event_id > AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 801 return; 802 } 803 804 uint16_t event_mask = (1 << event_id); 805 uint16_t reset_event_mask = ~event_mask; 806 807 switch (ctype){ 808 case AVRCP_CTYPE_RESPONSE_REJECTED: 809 connection->controller_notifications_to_deregister &= reset_event_mask; 810 connection->controller_notifications_to_register &= reset_event_mask; 811 connection->controller_initial_status_reported &= reset_event_mask; 812 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, event_id, false); 813 return; 814 815 case AVRCP_CTYPE_RESPONSE_INTERIM: 816 // register as enabled 817 connection->notifications_enabled |= event_mask; 818 819 // check if initial value is already sent 820 if ((connection->controller_initial_status_reported & event_mask) != 0 ){ 821 return; 822 } 823 // emit event only once, initially 824 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, true); 825 connection->controller_initial_status_reported |= event_mask; 826 // emit initial value after this switch 827 break; 828 829 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 830 // received change, event is considered de-registered 831 // we are re-enabling it automatically, if it is not 832 // explicitly disabled 833 connection->notifications_enabled &= reset_event_mask; 834 if ((connection->controller_notifications_to_deregister & event_mask) == 0){ 835 avrcp_controller_register_notification(connection, event_id); 836 } else { 837 connection->controller_notifications_to_deregister &= reset_event_mask; 838 connection->controller_notifications_to_register &= reset_event_mask; 839 connection->controller_initial_status_reported &= reset_event_mask; 840 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, false); 841 } 842 break; 843 844 default: 845 return; 846 } 847 848 avrcp_controller_emit_notification_for_event_id(connection->avrcp_cid, event_id, ctype, payload + pos, size - pos); 849 } 850 851 #ifdef ENABLE_AVCTP_FRAGMENTATION 852 static void avctp_reassemble_message(avrcp_connection_t * connection, avctp_packet_type_t packet_type, uint8_t *packet, uint16_t size){ 853 // after header (transaction label and packet type) 854 uint16_t pos; 855 uint16_t bytes_to_store; 856 857 switch (packet_type){ 858 case AVCTP_START_PACKET: 859 if (size < 2) return; 860 861 // store header 862 pos = 0; 863 connection->avctp_reassembly_buffer[pos] = packet[pos]; 864 pos++; 865 connection->avctp_reassembly_size = pos; 866 867 // NOTE: num packets not needed for reassembly, ignoring it does not pose security risk -> no need to store it 868 pos++; 869 870 // PID in reassembled packet is at offset 1, it will be read later after the avctp_reassemble_message with AVCTP_END_PACKET is called 871 872 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 873 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 874 connection->avctp_reassembly_size += bytes_to_store; 875 break; 876 877 case AVCTP_CONTINUE_PACKET: 878 case AVCTP_END_PACKET: 879 if (size < 1) return; 880 881 // store remaining data, ignore header 882 pos = 1; 883 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 884 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 885 connection->avctp_reassembly_size += bytes_to_store; 886 break; 887 888 default: 889 return; 890 } 891 } 892 #endif 893 894 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 895 if (size < 6u) return; 896 uint8_t pdu_id; 897 avrcp_packet_type_t vendor_dependent_avrcp_packet_type; 898 899 uint16_t pos = 0; 900 connection->controller_last_confirmed_transaction_id = packet[pos] >> 4; 901 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((packet[pos] >> 1) & 0x01); 902 avctp_packet_type_t packet_type = (avctp_packet_type_t)((packet[pos] >> 2) & 0x03); 903 pos++; 904 905 if (frame_type != AVRCP_RESPONSE_FRAME) return; 906 907 switch (packet_type){ 908 case AVCTP_SINGLE_PACKET: 909 break; 910 911 #ifdef ENABLE_AVCTP_FRAGMENTATION 912 case AVCTP_START_PACKET: 913 case AVCTP_CONTINUE_PACKET: 914 avctp_reassemble_message(connection, packet_type, packet, size); 915 return; 916 917 case AVCTP_END_PACKET: 918 avctp_reassemble_message(connection, packet_type, packet, size); 919 920 packet = connection->avctp_reassembly_buffer; 921 size = connection->avctp_reassembly_size; 922 break; 923 #endif 924 925 default: 926 return; 927 } 928 929 pos += 2; // PID 930 931 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 932 933 #ifdef ENABLE_LOG_INFO 934 uint8_t byte_value = packet[pos]; 935 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 936 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 937 #endif 938 pos++; 939 940 uint8_t opcode = packet[pos++]; 941 uint16_t param_length; 942 943 switch (opcode){ 944 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 945 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 946 connection->state = AVCTP_CONNECTION_OPENED; 947 948 #ifdef ENABLE_LOG_INFO 949 // page, extension code (1) 950 pos++; 951 uint8_t unit_type = packet[pos] >> 3; 952 uint8_t max_subunit_ID = packet[pos] & 0x07; 953 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); 954 #endif 955 break; 956 } 957 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 958 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 959 connection->state = AVCTP_CONNECTION_OPENED; 960 961 #ifdef ENABLE_LOG_INFO 962 // byte value 7 (1) 963 pos++; 964 uint8_t unit_type = packet[pos] >> 3; 965 uint8_t unit = packet[pos] & 0x07; 966 pos++; 967 uint32_t company_id = big_endian_read_24(packet, pos); 968 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, 969 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 970 #endif 971 break; 972 } 973 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 974 if ((size - pos) < 7){ 975 return; 976 } 977 // Company ID (3) 978 pos += 3; 979 pdu_id = packet[pos++]; 980 vendor_dependent_avrcp_packet_type = (avrcp_packet_type_t)(packet[pos++] & 0x03); 981 param_length = big_endian_read_16(packet, pos); 982 pos += 2; 983 984 if ((size - pos) < param_length) { 985 return; 986 } 987 988 // handle asynchronous notifications, without changing state 989 if (pdu_id == AVRCP_PDU_ID_REGISTER_NOTIFICATION){ 990 avrcp_controller_handle_notification(connection, ctype, packet + pos, size - pos); 991 break; 992 } 993 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 994 connection->state = AVCTP_CONNECTION_OPENED; 995 996 log_info("VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 997 switch (pdu_id){ 998 case AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE:{ 999 uint8_t num_attributes = packet[pos++]; 1000 int i; 1001 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 1002 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 1003 for (i = 0; i < num_attributes; i++){ 1004 uint8_t attribute_id = packet[pos++]; 1005 uint8_t value = packet[pos++]; 1006 switch (attribute_id){ 1007 case 0x02: 1008 repeat_mode = (avrcp_repeat_mode_t) value; 1009 break; 1010 case 0x03: 1011 shuffle_mode = (avrcp_shuffle_mode_t) value; 1012 break; 1013 default: 1014 break; 1015 } 1016 } 1017 avrcp_controller_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 1018 break; 1019 } 1020 1021 case AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE:{ 1022 uint16_t offset = 0; 1023 uint8_t event[6]; 1024 event[offset++] = HCI_EVENT_AVRCP_META; 1025 event[offset++] = sizeof(event) - 2; 1026 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 1027 little_endian_store_16(event, offset, connection->avrcp_cid); 1028 offset += 2; 1029 event[offset++] = ctype; 1030 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1031 break; 1032 } 1033 1034 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 1035 uint16_t offset = 0; 1036 uint8_t event[7]; 1037 event[offset++] = HCI_EVENT_AVRCP_META; 1038 event[offset++] = sizeof(event) - 2; 1039 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 1040 little_endian_store_16(event, offset, connection->avrcp_cid); 1041 offset += 2; 1042 event[offset++] = ctype; 1043 event[offset++] = packet[pos++]; 1044 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1045 break; 1046 } 1047 1048 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 1049 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 1050 uint8_t capability_count = 0; 1051 if (param_length > 1){ 1052 capability_count = packet[pos++]; 1053 } 1054 uint16_t i; 1055 uint16_t offset; 1056 uint8_t event[10]; 1057 1058 switch (capability_id){ 1059 1060 case AVRCP_CAPABILITY_ID_COMPANY: 1061 for (i = 0; (i < capability_count) && ((size - pos) >= 3); i++){ 1062 uint32_t company_id = big_endian_read_24(packet, pos); 1063 pos += 3; 1064 log_info(" 0x%06" PRIx32 ", ", company_id); 1065 1066 offset = 0; 1067 event[offset++] = HCI_EVENT_AVRCP_META; 1068 event[offset++] = sizeof(event) - 2; 1069 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID; 1070 little_endian_store_16(event, offset, connection->avrcp_cid); 1071 offset += 2; 1072 event[offset++] = ctype; 1073 event[offset++] = 0; 1074 little_endian_store_24(event, offset, company_id); 1075 offset += 3; 1076 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1077 } 1078 1079 offset = 0; 1080 event[offset++] = HCI_EVENT_AVRCP_META; 1081 event[offset++] = sizeof(event) - 2; 1082 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID_DONE; 1083 little_endian_store_16(event, offset, connection->avrcp_cid); 1084 offset += 2; 1085 event[offset++] = ctype; 1086 event[offset++] = 0; 1087 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1088 break; 1089 1090 case AVRCP_CAPABILITY_ID_EVENT: 1091 for (i = 0; (i < capability_count) && ((size - pos) >= 1); i++){ 1092 uint8_t event_id = packet[pos++]; 1093 connection->notifications_supported_by_target |= (1 << event_id); 1094 } 1095 1096 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_KNOWN; 1097 1098 // if the get supported events query is triggered by avrcp_controller_enable_notification call, 1099 // avrcp_controller_emit_supported_events should be suppressed 1100 if (connection->controller_notifications_supported_by_target_suppress_emit_result){ 1101 connection->controller_notifications_supported_by_target_suppress_emit_result = false; 1102 // also, notification might not be supported 1103 // if so, emit AVRCP_SUBEVENT_ENABLE_NOTIFICATION_COMPLETE event to app, 1104 // and update controller_notifications_to_register bitmap 1105 for (i = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; i < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; i++){ 1106 if ((connection->controller_notifications_to_register & (1 << i)) != 0){ 1107 if ((connection->notifications_supported_by_target & (1 << i)) == 0){ 1108 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, (uint8_t) i, false); 1109 connection->controller_notifications_to_register &= ~(1 << i); 1110 } 1111 } 1112 } 1113 break; 1114 } 1115 // supported events are emitted only if the get supported events query 1116 // is triggered by avrcp_controller_get_supported_events call 1117 avrcp_controller_emit_supported_events(connection); 1118 break; 1119 1120 default: 1121 // ignore 1122 break; 1123 } 1124 break; 1125 } 1126 1127 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 1128 uint32_t song_length = big_endian_read_32(packet, pos); 1129 pos += 4; 1130 uint32_t song_position = big_endian_read_32(packet, pos); 1131 pos += 4; 1132 uint8_t play_status = packet[pos]; 1133 1134 uint8_t event[15]; 1135 int offset = 0; 1136 event[offset++] = HCI_EVENT_AVRCP_META; 1137 event[offset++] = sizeof(event) - 2; 1138 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 1139 little_endian_store_16(event, offset, connection->avrcp_cid); 1140 offset += 2; 1141 event[offset++] = ctype; 1142 little_endian_store_32(event, offset, song_length); 1143 offset += 4; 1144 little_endian_store_32(event, offset, song_position); 1145 offset += 4; 1146 event[offset++] = play_status; 1147 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1148 break; 1149 } 1150 1151 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES: 1152 switch (vendor_dependent_avrcp_packet_type){ 1153 case AVRCP_START_PACKET: 1154 case AVRCP_SINGLE_PACKET: 1155 avrcp_parser_reset(connection); 1156 connection->list_size = param_length; 1157 // num_attributes 1158 pos++; 1159 1160 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1161 if (vendor_dependent_avrcp_packet_type == AVRCP_START_PACKET){ 1162 avrcp_controller_request_continue_response(connection); 1163 return; 1164 } 1165 break; 1166 case AVRCP_CONTINUE_PACKET: 1167 case AVRCP_END_PACKET: 1168 connection->controller_num_received_fragments++; 1169 1170 if (connection->controller_num_received_fragments < connection->controller_max_num_fragments){ 1171 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1172 1173 if (vendor_dependent_avrcp_packet_type == AVRCP_CONTINUE_PACKET){ 1174 avrcp_controller_request_continue_response(connection); 1175 return; 1176 } 1177 } else { 1178 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 1179 avrcp_parser_reset(connection); 1180 avrcp_controller_request_abort_continuation(connection); 1181 return; 1182 } 1183 break; 1184 default: 1185 btstack_assert(false); 1186 break; 1187 } 1188 break; 1189 1190 default: 1191 // custom command response comes here 1192 switch (pdu_id){ 1193 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 1194 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 1195 break; 1196 default: 1197 if (pdu_id != connection->pdu_id) { 1198 break; 1199 } 1200 uint8_t *in_place_buffer = packet + pos - 9; 1201 avrcp_controller_prepare_custom_command_response(connection, param_length, 1202 in_place_buffer); 1203 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, in_place_buffer, 1204 param_length + 9); 1205 1206 break; 1207 } 1208 break; 1209 } 1210 break; 1211 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 1212 if ((size - pos) < 1) return; 1213 uint8_t operation_id = packet[pos++]; 1214 UNUSED(pos); 1215 switch (connection->state){ 1216 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1217 // trigger release for simple command: 1218 if (!connection->controller_press_and_hold_cmd_active){ 1219 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1220 break; 1221 } 1222 // for press and hold, send release if it just has been requested, otherwise, wait for next repeat 1223 if (connection->controller_press_and_hold_cmd_release){ 1224 connection->controller_press_and_hold_cmd_release = false; 1225 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1226 } else { 1227 connection->state = AVCTP_W4_STOP; 1228 } 1229 break; 1230 case AVCTP_W2_RECEIVE_RESPONSE: 1231 connection->state = AVCTP_CONNECTION_OPENED; 1232 break; 1233 default: 1234 break; 1235 } 1236 if (connection->state == AVCTP_W4_STOP){ 1237 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 1238 } 1239 if (connection->state == AVCTP_CONNECTION_OPENED) { 1240 // RELEASE response 1241 operation_id = operation_id & 0x7F; 1242 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 1243 } 1244 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 1245 // PRESS response 1246 avrcp_controller_request_pass_through_release_control_cmd(connection); 1247 } 1248 break; 1249 } 1250 default: 1251 break; 1252 } 1253 1254 // trigger pending notification reqistrations 1255 if ((connection->state == AVCTP_CONNECTION_OPENED) && connection->controller_notifications_to_register){ 1256 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1257 } 1258 } 1259 1260 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 1261 // identifier (9) + num attributes (1) + attributes (4 * num attributes) 1262 uint8_t get_element_attributes_command[9+8*((AVRCP_MEDIA_ATTR_RESERVED-AVRCP_MEDIA_ATTR_TITLE) + 1)]; 1263 uint16_t pos; 1264 uint16_t num_attributes_index; 1265 uint8_t i; 1266 1267 switch (connection->state){ 1268 case AVCTP_W2_SEND_PRESS_COMMAND: 1269 avrcp_send_cmd_with_avctp_fragmentation(connection); 1270 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 1271 return; 1272 1273 case AVCTP_W2_SEND_RELEASE_COMMAND: 1274 avrcp_send_cmd_with_avctp_fragmentation(connection); 1275 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1276 return; 1277 1278 case AVCTP_W2_SEND_COMMAND: 1279 avrcp_send_cmd_with_avctp_fragmentation(connection); 1280 if (connection->data_offset < connection->data_len){ 1281 // continue AVCTP fragmentation 1282 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1283 return; 1284 } 1285 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1286 return; 1287 case AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST: 1288 // build command in local buffer 1289 pos = 0; 1290 connection->data = get_element_attributes_command; 1291 // write identifier 1292 memset(connection->data, 0, 8); 1293 pos += 8; 1294 num_attributes_index = pos; 1295 // If num_attributes is set to zero, all attribute information shall be returned, 1296 // and the AttributeID field is omitted 1297 connection->data[num_attributes_index] = 0; 1298 pos++; 1299 for (i = 0; i < (uint8_t)AVRCP_MEDIA_ATTR_RESERVED - (uint8_t)AVRCP_MEDIA_ATTR_TITLE; i++){ 1300 if ((connection->controller_element_attributes & (1<<i)) != 0){ 1301 // every attribute is 4 bytes long 1302 big_endian_store_32(connection->data, pos, AVRCP_MEDIA_ATTR_TITLE + i); 1303 pos += 4; 1304 connection->data[num_attributes_index]++; 1305 } 1306 } 1307 1308 // Parameter Length 1309 connection->data_len = pos; 1310 1311 log_info("AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST, len %u", connection->data_len); 1312 1313 // send data - assume it will fit into one packet 1314 avrcp_send_cmd_with_avctp_fragmentation(connection); 1315 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1316 return; 1317 default: 1318 break; 1319 } 1320 1321 // send register notification if queued, 1322 // avrcp_handle_l2cap_data_packet_for_signaling_connection will trigger next one 1323 if (connection->controller_notifications_to_register != 0){ 1324 uint8_t event_id; 1325 for (event_id = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t)AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 1326 if (connection->controller_notifications_to_register & (1 << event_id)){ 1327 connection->controller_notifications_to_register &= ~ (1 << event_id); 1328 avrcp_send_register_notification(connection, event_id); 1329 return; 1330 } 1331 } 1332 } 1333 } 1334 1335 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1336 avrcp_connection_t * connection; 1337 1338 switch (packet_type) { 1339 case L2CAP_DATA_PACKET: 1340 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1341 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1342 break; 1343 1344 case HCI_EVENT_PACKET: 1345 switch (hci_event_packet_get_type(packet)){ 1346 case L2CAP_EVENT_CAN_SEND_NOW: 1347 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1348 avrcp_controller_handle_can_send_now(connection); 1349 break; 1350 default: 1351 break; 1352 } 1353 default: 1354 break; 1355 } 1356 } 1357 1358 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){ 1359 if (service_name == NULL){ 1360 service_name = avrcp_default_controller_service_name; 1361 } 1362 if (service_provider_name == NULL){ 1363 service_provider_name = avrcp_default_controller_service_provider_name; 1364 } 1365 avrcp_create_sdp_record(true, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 1366 } 1367 1368 void avrcp_controller_init(void){ 1369 avrcp_controller_context.role = AVRCP_CONTROLLER; 1370 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 1371 avrcp_register_controller_packet_handler(&avrcp_controller_packet_handler); 1372 } 1373 1374 void avrcp_controller_deinit(void){ 1375 memset(&avrcp_controller_context, 0, sizeof(avrcp_context_t)); 1376 } 1377 1378 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 1379 btstack_assert(callback != NULL); 1380 avrcp_controller_context.avrcp_callback = callback; 1381 } 1382 1383 1384 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 1385 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1386 } 1387 1388 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 1389 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1390 } 1391 1392 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 1393 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1394 } 1395 1396 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 1397 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1398 } 1399 1400 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 1401 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1402 } 1403 1404 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 1405 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1406 } 1407 1408 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1409 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1410 } 1411 1412 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1413 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1414 } 1415 1416 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1417 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1418 } 1419 1420 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1421 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1422 } 1423 1424 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1425 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1426 } 1427 1428 /* start continuous cmds */ 1429 1430 uint8_t avrcp_controller_start_press_and_hold_cmd(uint16_t avrcp_cid, avrcp_operation_id_t operation_id){ 1431 return request_continuous_pass_through_press_control_cmd(avrcp_cid, operation_id, 0); 1432 } 1433 1434 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1435 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1436 } 1437 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1438 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1439 } 1440 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1441 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1442 } 1443 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1444 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1445 } 1446 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1447 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1448 } 1449 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1450 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1451 } 1452 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1453 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1454 } 1455 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1456 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1457 } 1458 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1459 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1460 } 1461 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1462 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1463 } 1464 1465 /* stop continuous cmds */ 1466 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1467 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1468 if (!connection){ 1469 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1470 } 1471 1472 switch (connection->state){ 1473 // respond when we receive response for (repeated) press command 1474 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1475 connection->controller_press_and_hold_cmd_release = true; 1476 break; 1477 1478 // release already sent or on the way, nothing to do 1479 case AVCTP_W2_RECEIVE_RESPONSE: 1480 case AVCTP_W2_SEND_RELEASE_COMMAND: 1481 break; 1482 1483 // about to send next repeated press command or wait for it -> release right away 1484 case AVCTP_W2_SEND_PRESS_COMMAND: 1485 case AVCTP_W4_STOP: 1486 return avrcp_controller_request_pass_through_release_control_cmd(connection); 1487 1488 // otherwise reject request 1489 default: 1490 return ERROR_CODE_COMMAND_DISALLOWED; 1491 } 1492 return ERROR_CODE_SUCCESS; 1493 } 1494 1495 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1496 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1497 if (!connection){ 1498 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1499 } 1500 return avrcp_controller_register_notification(connection, event_id); 1501 } 1502 1503 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1504 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1505 if (!connection){ 1506 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1507 } 1508 if (connection->remote_capabilities_state != AVRCP_REMOTE_CAPABILITIES_KNOWN){ 1509 return ERROR_CODE_COMMAND_DISALLOWED; 1510 } 1511 1512 if ((connection->notifications_supported_by_target & (1 << event_id)) == 0){ 1513 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1514 } 1515 1516 if ((connection->notifications_enabled & (1 << event_id)) == 0){ 1517 return ERROR_CODE_SUCCESS; 1518 } 1519 1520 connection->controller_notifications_to_deregister |= (1 << event_id); 1521 return ERROR_CODE_SUCCESS; 1522 } 1523 1524 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 1525 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1526 if (!connection){ 1527 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1528 } 1529 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1530 1531 connection->state = AVCTP_W2_SEND_COMMAND; 1532 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_UNIT_INFO, AVRCP_CTYPE_STATUS, 1533 AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, AVRCP_PDU_ID_UNDEFINED, 1534 0); 1535 1536 connection->data = connection->message_body; 1537 memset(connection->data, 0xFF, 5); 1538 connection->data_len = 5; 1539 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1540 return ERROR_CODE_SUCCESS; 1541 } 1542 1543 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 1544 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1545 if (!connection){ 1546 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1547 } 1548 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1549 1550 connection->state = AVCTP_W2_SEND_COMMAND; 1551 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_SUBUNIT_INFO, AVRCP_CTYPE_STATUS, 1552 AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, AVRCP_PDU_ID_UNDEFINED, 1553 0); 1554 1555 connection->data = connection->message_body; 1556 memset(connection->data, 0xFF, 5); 1557 connection->data[0] = 7; // page: 0, extension_code: 7 1558 connection->data_len = 5; 1559 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1560 return ERROR_CODE_SUCCESS; 1561 } 1562 1563 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 1564 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1565 if (!connection){ 1566 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1567 } 1568 if (connection->state != AVCTP_CONNECTION_OPENED){ 1569 return ERROR_CODE_COMMAND_DISALLOWED; 1570 } 1571 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_COMPANY); 1572 return ERROR_CODE_SUCCESS; 1573 } 1574 1575 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 1576 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1577 if (!connection){ 1578 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1579 } 1580 if (connection->state != AVCTP_CONNECTION_OPENED){ 1581 return ERROR_CODE_COMMAND_DISALLOWED; 1582 } 1583 1584 switch (connection->remote_capabilities_state){ 1585 case AVRCP_REMOTE_CAPABILITIES_NONE: 1586 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_W4_QUERY_RESULT; 1587 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 1588 break; 1589 case AVRCP_REMOTE_CAPABILITIES_KNOWN: 1590 avrcp_controller_emit_supported_events(connection); 1591 break; 1592 default: 1593 break; 1594 } 1595 return ERROR_CODE_SUCCESS; 1596 } 1597 1598 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1599 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1600 if (!connection){ 1601 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1602 } 1603 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1604 1605 connection->state = AVCTP_W2_SEND_COMMAND; 1606 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_PLAY_STATUS, true); 1607 1608 connection->data_len = 0; 1609 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1610 return ERROR_CODE_SUCCESS; 1611 } 1612 1613 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1614 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1615 if (!connection){ 1616 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1617 } 1618 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1619 1620 connection->state = AVCTP_W2_SEND_COMMAND; 1621 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ADDRESSED_PLAYER, true); 1622 1623 connection->data_len = 2; 1624 big_endian_store_16(connection->data, 0, addressed_player_id); 1625 1626 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1627 return ERROR_CODE_SUCCESS; 1628 } 1629 1630 uint8_t avrcp_controller_get_element_attributes(uint16_t avrcp_cid, uint8_t num_attributes, avrcp_media_attribute_id_t * attributes){ 1631 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1632 if (!connection){ 1633 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1634 } 1635 1636 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1637 1638 if (num_attributes >= AVRCP_MEDIA_ATTR_RESERVED) { 1639 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 1640 } 1641 1642 connection->state = AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST; 1643 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES, true); 1644 1645 // collect element attributes 1646 uint8_t i; 1647 uint16_t attributes_set = 0; 1648 for (i = 0; i < num_attributes; i++){ 1649 // ignore invalid attribute ID and "get all attributes" 1650 if (AVRCP_MEDIA_ATTR_ALL < attributes[i] && attributes[i] < AVRCP_MEDIA_ATTR_RESERVED){ 1651 attributes_set |= 1 << (attributes[i] - AVRCP_MEDIA_ATTR_TITLE); 1652 } 1653 } 1654 connection->controller_element_attributes = attributes_set; 1655 1656 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1657 return ERROR_CODE_SUCCESS; 1658 } 1659 1660 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1661 return avrcp_controller_get_element_attributes(avrcp_cid, 0, NULL); 1662 } 1663 1664 uint8_t avrcp_controller_get_now_playing_info_for_media_attribute_id(uint16_t avrcp_cid, avrcp_media_attribute_id_t media_attribute_id){ 1665 if (media_attribute_id == AVRCP_MEDIA_ATTR_ALL){ 1666 return avrcp_controller_get_now_playing_info(avrcp_cid); 1667 } 1668 avrcp_media_attribute_id_t media_attrs[1]; 1669 media_attrs[0] = media_attribute_id; 1670 return avrcp_controller_get_element_attributes(avrcp_cid, 1, media_attrs); 1671 } 1672 1673 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1674 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1675 if (!connection){ 1676 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1677 } 1678 1679 // 1680 // allow sending of multiple set abs volume commands without waiting for response 1681 // 1682 uint8_t status = ERROR_CODE_COMMAND_DISALLOWED; 1683 switch (connection->state){ 1684 case AVCTP_CONNECTION_OPENED: 1685 status = ERROR_CODE_SUCCESS; 1686 break; 1687 case AVCTP_W2_RECEIVE_RESPONSE: 1688 // - is pending response also set abs volume 1689 if (connection->command_opcode != AVRCP_CMD_OPCODE_VENDOR_DEPENDENT) break; 1690 if (connection->command_type != AVRCP_CTYPE_CONTROL) break; 1691 if (connection->subunit_type != AVRCP_SUBUNIT_TYPE_PANEL) break; 1692 if (connection->subunit_id != AVRCP_SUBUNIT_ID) break; 1693 if (connection->pdu_id != AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME) break; 1694 // - is next transaction id valid in window 1695 if (avrcp_controller_is_transaction_id_valid(connection, avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter)) == false) break; 1696 status = ERROR_CODE_SUCCESS; 1697 break; 1698 default: 1699 break; 1700 } 1701 if (status != ERROR_CODE_SUCCESS) return status; 1702 1703 connection->state = AVCTP_W2_SEND_COMMAND; 1704 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME, true); 1705 1706 // Parameter Length 1707 connection->data_len = 1; 1708 connection->data[0] = volume; 1709 1710 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1711 return ERROR_CODE_SUCCESS; 1712 } 1713 1714 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 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 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1720 1721 connection->state = AVCTP_W2_SEND_COMMAND; 1722 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE, true); 1723 1724 connection->data_len = 5; 1725 connection->data[0] = 4; // NumPlayerApplicationSettingAttributeID 1726 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1727 connection->data[1] = 0x01; // equalizer (1-OFF, 2-ON) 1728 connection->data[2] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1729 connection->data[3] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1730 connection->data[4] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1731 1732 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1733 return ERROR_CODE_SUCCESS; 1734 } 1735 1736 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1737 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1738 if (!connection){ 1739 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1740 } 1741 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1742 1743 connection->state = AVCTP_W2_SEND_COMMAND; 1744 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE, true); 1745 1746 // Parameter Length 1747 connection->data_len = 3; 1748 connection->data[0] = 2; 1749 connection->data[1] = attr_id; 1750 connection->data[2] = attr_value; 1751 1752 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1753 return ERROR_CODE_SUCCESS; 1754 } 1755 1756 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1757 if ((mode < AVRCP_SHUFFLE_MODE_OFF) || (mode > AVRCP_SHUFFLE_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1758 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1759 } 1760 1761 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1762 if ((mode < AVRCP_REPEAT_MODE_OFF) || (mode > AVRCP_REPEAT_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1763 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1764 } 1765 1766 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1767 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1768 if (!connection){ 1769 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1770 } 1771 if (connection->state != AVCTP_CONNECTION_OPENED){ 1772 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1773 return ERROR_CODE_COMMAND_DISALLOWED; 1774 } 1775 connection->state = AVCTP_W2_SEND_COMMAND; 1776 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_PLAY_ITEM, true); 1777 1778 // Parameter Length 1779 connection->data_len = 11; 1780 connection->data[0] = scope; 1781 memset(&connection->data[1], 0, 8); 1782 if (uid){ 1783 (void)memcpy(&connection->data[1], uid, 8); 1784 } 1785 big_endian_store_16(connection->data, 9, uid_counter); 1786 1787 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1788 return ERROR_CODE_SUCCESS; 1789 } 1790 1791 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){ 1792 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1793 if (!connection){ 1794 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1795 } 1796 if (connection->state != AVCTP_CONNECTION_OPENED){ 1797 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1798 return ERROR_CODE_COMMAND_DISALLOWED; 1799 } 1800 1801 connection->state = AVCTP_W2_SEND_COMMAND; 1802 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_ADD_TO_NOW_PLAYING, true); 1803 1804 // Parameter Length 1805 connection->data_len = 11; 1806 connection->data[0] = scope; 1807 memset(&connection->data[1], 0, 8); 1808 if (uid){ 1809 (void)memcpy(&connection->data[1], uid, 8); 1810 } 1811 big_endian_store_16(connection->data, 9, uid_counter); 1812 1813 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1814 return ERROR_CODE_SUCCESS; 1815 } 1816 1817 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1818 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1819 if (!connection){ 1820 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1821 } 1822 connection->controller_max_num_fragments = max_num_fragments; 1823 return ERROR_CODE_SUCCESS; 1824 } 1825 1826 1827 uint8_t avrcp_controller_send_custom_command(uint16_t avrcp_cid, 1828 avrcp_command_type_t command_type, 1829 avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 1830 avrcp_pdu_id_t pdu_id, uint32_t company_id, 1831 const uint8_t * data, uint16_t data_len){ 1832 1833 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1834 if (!connection){ 1835 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1836 } 1837 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1838 1839 connection->state = AVCTP_W2_SEND_COMMAND; 1840 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_VENDOR_DEPENDENT, command_type, subunit_type, 1841 subunit_id, pdu_id, company_id); 1842 1843 connection->data = (uint8_t *)data; 1844 connection->data_len = data_len; 1845 1846 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1847 return ERROR_CODE_SUCCESS; 1848 } 1849 1850 uint8_t avrcp_controller_force_send_press_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid){ 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 if (connection->state < AVCTP_CONNECTION_OPENED){ 1856 return ERROR_CODE_COMMAND_DISALLOWED; 1857 } 1858 1859 connection->state = AVCTP_W2_SEND_COMMAND; 1860 avrcp_controller_pass_through_command_data_init(connection, opid); 1861 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1862 return ERROR_CODE_SUCCESS; 1863 }