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 MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp_controller.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <inttypes.h> 43 44 #include "classic/avrcp.h" 45 #include "classic/avrcp_controller.h" 46 47 #include "bluetooth_sdp.h" 48 #include "btstack_debug.h" 49 #include "btstack_event.h" 50 #include "btstack_util.h" 51 #include "l2cap.h" 52 53 #define AVRCP_CMD_BUFFER_SIZE 30 54 55 // made public in avrcp_controller.h 56 avrcp_context_t avrcp_controller_context; 57 58 static uint8_t avrcp_controller_calc_next_transaction_label(uint8_t current_transaction_label){ 59 current_transaction_label++; 60 if (current_transaction_label == 16){ 61 current_transaction_label = 1; 62 } 63 return current_transaction_label; 64 } 65 66 static uint8_t avrcp_controller_get_next_transaction_label(avrcp_connection_t * connection){ 67 connection->transaction_id_counter = avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter); 68 return connection->transaction_id_counter; 69 } 70 71 static bool avrcp_controller_is_transaction_id_valid(avrcp_connection_t * connection, uint8_t transaction_id){ 72 uint8_t delta = ((int8_t) transaction_id - connection->last_confirmed_transaction_id) & 0x0f; 73 return delta < 15; 74 } 75 76 static uint16_t avrcp_get_max_payload_size_for_packet_type(avrcp_packet_type_t packet_type){ 77 switch (packet_type){ 78 case AVRCP_SINGLE_PACKET: 79 return AVRCP_CMD_BUFFER_SIZE - 3; 80 case AVRCP_START_PACKET: 81 return AVRCP_CMD_BUFFER_SIZE - 4; 82 case AVRCP_CONTINUE_PACKET: 83 case AVRCP_END_PACKET: 84 return AVRCP_CMD_BUFFER_SIZE - 1; 85 default: 86 btstack_assert(false); 87 return 0; 88 } 89 } 90 91 static int avrcp_controller_supports_browsing(uint16_t controller_supported_features){ 92 return controller_supported_features & AVRCP_FEATURE_MASK_BROWSING; 93 } 94 95 static void avrcp_controller_emit_notification_complete(avrcp_connection_t * connection, uint8_t status, uint8_t event_id){ 96 uint8_t event[7]; 97 uint8_t pos = 0; 98 event[pos++] = HCI_EVENT_AVRCP_META; 99 event[pos++] = sizeof(event) - 2; 100 event[pos++] = AVRCP_SUBEVENT_ENABLE_NOTIFICATION_COMPLETE; 101 little_endian_store_16(event, pos, connection->avrcp_cid); 102 pos += 2; 103 event[pos++] = status; 104 event[pos++] = event_id; 105 UNUSED(pos); 106 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 107 } 108 109 static void avrcp_controller_emit_supported_events(avrcp_connection_t * connection){ 110 uint8_t ctype = (uint8_t) AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 111 uint8_t event_id; 112 113 for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 114 if ( (connection->remote_supported_notifications & (1<<event_id)) == 0){ 115 continue; 116 } 117 uint8_t event[8]; 118 uint8_t pos = 0; 119 event[pos++] = HCI_EVENT_AVRCP_META; 120 event[pos++] = sizeof(event) - 2; 121 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID; 122 little_endian_store_16(event, pos, connection->avrcp_cid); 123 pos += 2; 124 event[pos++] = ctype; 125 event[pos++] = 0; 126 event[pos++] = event_id; 127 UNUSED(pos); 128 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 129 } 130 131 uint8_t event[7]; 132 uint8_t pos = 0; 133 event[pos++] = HCI_EVENT_AVRCP_META; 134 event[pos++] = sizeof(event) - 2; 135 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE; 136 little_endian_store_16(event, pos, connection->avrcp_cid); 137 pos += 2; 138 event[pos++] = ctype; 139 event[pos++] = 0; 140 UNUSED(pos); 141 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 142 } 143 144 static void avrcp_controller_emit_notification_for_event_id(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id, 145 avrcp_command_type_t ctype, const uint8_t *payload, 146 uint16_t size) { 147 switch (event_id){ 148 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED:{ 149 if (size < 4) break; 150 uint32_t song_position = big_endian_read_32(payload, 0); 151 uint16_t offset = 0; 152 uint8_t event[10]; 153 event[offset++] = HCI_EVENT_AVRCP_META; 154 event[offset++] = sizeof(event) - 2; 155 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED; 156 little_endian_store_16(event, offset, avrcp_cid); 157 offset += 2; 158 event[offset++] = ctype; 159 little_endian_store_32(event, offset, song_position); 160 offset += 4; 161 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 162 break; 163 } 164 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED:{ 165 if (size < 1) break; 166 uint16_t offset = 0; 167 uint8_t event[7]; 168 event[offset++] = HCI_EVENT_AVRCP_META; 169 event[offset++] = sizeof(event) - 2; 170 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED; 171 little_endian_store_16(event, offset, avrcp_cid); 172 offset += 2; 173 event[offset++] = ctype; 174 event[offset++] = payload[0]; 175 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 176 break; 177 } 178 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED:{ 179 uint16_t offset = 0; 180 uint8_t event[6]; 181 event[offset++] = HCI_EVENT_AVRCP_META; 182 event[offset++] = sizeof(event) - 2; 183 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED; 184 little_endian_store_16(event, offset, avrcp_cid); 185 offset += 2; 186 event[offset++] = ctype; 187 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 188 break; 189 } 190 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED:{ 191 uint16_t offset = 0; 192 uint8_t event[6]; 193 event[offset++] = HCI_EVENT_AVRCP_META; 194 event[offset++] = sizeof(event) - 2; 195 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED; 196 little_endian_store_16(event, offset, avrcp_cid); 197 offset += 2; 198 event[offset++] = ctype; 199 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 200 break; 201 } 202 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED:{ 203 uint16_t offset = 0; 204 uint8_t event[6]; 205 event[offset++] = HCI_EVENT_AVRCP_META; 206 event[offset++] = sizeof(event) - 2; 207 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED; 208 little_endian_store_16(event, offset, avrcp_cid); 209 offset += 2; 210 event[offset++] = ctype; 211 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 212 break; 213 } 214 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED:{ 215 if (size < 1) break; 216 uint16_t offset = 0; 217 uint8_t event[7]; 218 event[offset++] = HCI_EVENT_AVRCP_META; 219 event[offset++] = sizeof(event) - 2; 220 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 221 little_endian_store_16(event, offset, avrcp_cid); 222 offset += 2; 223 event[offset++] = ctype; 224 event[offset++] = payload[0] & 0x7F; 225 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 226 break; 227 } 228 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED:{ 229 if (size < 2) break; 230 uint8_t event[8]; 231 uint16_t offset = 0; 232 uint16_t uuid = big_endian_read_16(payload, 0); 233 event[offset++] = HCI_EVENT_AVRCP_META; 234 event[offset++] = sizeof(event) - 2; 235 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_UIDS_CHANGED; 236 little_endian_store_16(event, offset, avrcp_cid); 237 offset += 2; 238 event[offset++] = ctype; 239 little_endian_store_16(event, offset, uuid); 240 offset += 2; 241 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 242 break; 243 } 244 245 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_END:{ 246 uint16_t offset = 0; 247 uint8_t event[6]; 248 event[offset++] = HCI_EVENT_AVRCP_META; 249 event[offset++] = sizeof(event) - 2; 250 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END; 251 little_endian_store_16(event, offset, avrcp_cid); 252 offset += 2; 253 event[offset++] = ctype; 254 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 255 break; 256 } 257 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_START:{ 258 uint16_t offset = 0; 259 uint8_t event[6]; 260 event[offset++] = HCI_EVENT_AVRCP_META; 261 event[offset++] = sizeof(event) - 2; 262 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_START; 263 little_endian_store_16(event, offset, avrcp_cid); 264 offset += 2; 265 event[offset++] = ctype; 266 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 267 break; 268 } 269 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED:{ 270 if (size < 1) break; 271 uint16_t offset = 0; 272 uint8_t event[7]; 273 event[offset++] = HCI_EVENT_AVRCP_META; 274 event[offset++] = sizeof(event) - 2; 275 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_BATT_STATUS_CHANGED; 276 little_endian_store_16(event, offset, avrcp_cid); 277 offset += 2; 278 event[offset++] = ctype; 279 event[offset++] = payload[0]; 280 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 281 break; 282 } 283 284 case AVRCP_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED:{ 285 if (size < 1) break; 286 uint16_t offset = 0; 287 uint8_t event[7]; 288 event[offset++] = HCI_EVENT_AVRCP_META; 289 event[offset++] = sizeof(event) - 2; 290 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED; 291 little_endian_store_16(event, offset, avrcp_cid); 292 offset += 2; 293 event[offset++] = ctype; 294 event[offset++] = payload[0]; 295 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 296 break; 297 } 298 299 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 300 default: 301 log_info("avrcp: not implemented"); 302 break; 303 } 304 } 305 306 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){ 307 btstack_assert(callback != NULL); 308 309 uint8_t event[8]; 310 int pos = 0; 311 event[pos++] = HCI_EVENT_AVRCP_META; 312 event[pos++] = sizeof(event) - 2; 313 event[pos++] = AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE; 314 little_endian_store_16(event, pos, avrcp_cid); 315 pos += 2; 316 event[pos++] = ctype; 317 event[pos++] = repeat_mode; 318 event[pos++] = shuffle_mode; 319 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 320 } 321 322 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){ 323 uint8_t event[7]; 324 int pos = 0; 325 event[pos++] = HCI_EVENT_AVRCP_META; 326 event[pos++] = sizeof(event) - 2; 327 event[pos++] = AVRCP_SUBEVENT_NOW_PLAYING_INFO_DONE; 328 little_endian_store_16(event, pos, avrcp_cid); 329 pos += 2; 330 event[pos++] = ctype; 331 event[pos++] = status; 332 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 333 } 334 335 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){ 336 uint8_t event[HCI_EVENT_BUFFER_SIZE]; 337 int pos = 0; 338 event[pos++] = HCI_EVENT_AVRCP_META; 339 // reserve one byte for subevent type and data len 340 int data_len_pos = pos; 341 pos++; 342 int subevent_type_pos = pos; 343 pos++; 344 little_endian_store_16(event, pos, avrcp_cid); 345 pos += 2; 346 event[pos++] = ctype; 347 348 switch (attr_id){ 349 case AVRCP_MEDIA_ATTR_TITLE: 350 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO; 351 event[pos++] = value_len; 352 (void)memcpy(event + pos, value, value_len); 353 break; 354 case AVRCP_MEDIA_ATTR_ARTIST: 355 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO; 356 event[pos++] = value_len; 357 (void)memcpy(event + pos, value, value_len); 358 break; 359 case AVRCP_MEDIA_ATTR_ALBUM: 360 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO; 361 event[pos++] = value_len; 362 (void)memcpy(event + pos, value, value_len); 363 break; 364 case AVRCP_MEDIA_ATTR_GENRE: 365 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO; 366 event[pos++] = value_len; 367 (void)memcpy(event + pos, value, value_len); 368 break; 369 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 370 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_SONG_LENGTH_MS_INFO; 371 if (value){ 372 little_endian_store_32(event, pos, btstack_atoi((char *)value)); 373 } else { 374 little_endian_store_32(event, pos, 0); 375 } 376 pos += 4; 377 break; 378 case AVRCP_MEDIA_ATTR_TRACK: 379 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO; 380 if (value){ 381 event[pos++] = btstack_atoi((char *)value); 382 } else { 383 event[pos++] = 0; 384 } 385 break; 386 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 387 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO; 388 if (value){ 389 event[pos++] = btstack_atoi((char *)value); 390 } else { 391 event[pos++] = 0; 392 } 393 break; 394 default: 395 break; 396 } 397 event[data_len_pos] = pos - 2; 398 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 399 } 400 401 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){ 402 btstack_assert(callback != NULL); 403 404 uint8_t event[7]; 405 int pos = 0; 406 event[pos++] = HCI_EVENT_AVRCP_META; 407 event[pos++] = sizeof(event) - 2; 408 event[pos++] = subevent; 409 little_endian_store_16(event, pos, avrcp_cid); 410 pos += 2; 411 event[pos++] = ctype; 412 event[pos++] = operation_id; 413 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 414 } 415 416 static void avrcp_parser_reset(avrcp_connection_t * connection){ 417 connection->list_offset = 0; 418 connection->num_attributes = 0; 419 connection->num_parsed_attributes = 0; 420 connection->parser_attribute_header_pos = 0; 421 connection->num_received_fragments = 0; 422 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 423 } 424 425 static void avrcp_parser_process_byte(uint8_t byte, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 426 uint16_t attribute_total_value_len; 427 uint32_t attribute_id; 428 switch(connection->parser_state){ 429 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER: 430 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 431 connection->list_offset++; 432 433 if (connection->parser_attribute_header_pos < AVRCP_ATTRIBUTE_HEADER_LEN) return; 434 435 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 436 connection->attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTTE_SIZE); 437 if (connection->attribute_value_len > 0){ 438 // get ready for attribute value 439 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 440 return; 441 } 442 443 // emit empty attribute 444 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 445 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); 446 447 // done, see below 448 break; 449 450 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE: 451 connection->attribute_value[connection->attribute_value_offset++] = byte; 452 connection->list_offset++; 453 454 if (connection->attribute_value_offset < connection->attribute_value_len) return; 455 456 // emit (potentially partial) attribute 457 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 458 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); 459 460 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 461 if (connection->attribute_value_offset < attribute_total_value_len){ 462 // ignore rest of attribute 463 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 464 return; 465 } 466 467 // done, see below 468 break; 469 470 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 471 connection->attribute_value_offset++; 472 connection->list_offset++; 473 474 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 475 if (connection->attribute_value_offset < attribute_total_value_len) return; 476 477 // done, see below 478 break; 479 480 default: 481 return; 482 } 483 484 // attribute fully read, check if more to come 485 if (connection->list_offset < connection->list_size){ 486 // more to come, reset parser 487 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 488 connection->parser_attribute_header_pos = 0; 489 connection->attribute_value_offset = 0; 490 } else { 491 // fully done 492 avrcp_parser_reset(connection); 493 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 494 } 495 } 496 497 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){ 498 int i; 499 for (i=0;i<num_bytes_to_read;i++){ 500 avrcp_parser_process_byte(packet[i], connection, ctype); 501 } 502 } 503 504 505 static int avrcp_send_cmd(avrcp_connection_t * connection, avrcp_packet_type_t packet_type){ 506 uint8_t command[AVRCP_CMD_BUFFER_SIZE]; 507 uint16_t pos = 0; 508 509 // non-fragmented: transport header (1) + PID (2) 510 // fragmented: transport header (1) + num packets (1) + PID (2) 511 512 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 513 command[pos++] = (connection->transaction_id << 4) | (packet_type << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 514 515 if (packet_type == AVRCP_START_PACKET){ 516 // num packets: (3 bytes overhead (PID, num packets) + command) / (MTU - transport header). 517 // to get number of packets using integer division, we subtract 1 from the data e.g. len = 5, packet size 5 => need 1 packet 518 command[pos++] = ((connection->cmd_operands_fragmented_len + 3 - 1) / (AVRCP_CMD_BUFFER_SIZE - 1)) + 1; 519 } 520 521 if ((packet_type == AVRCP_SINGLE_PACKET) || (packet_type == AVRCP_START_PACKET)){ 522 // Profile IDentifier (PID) 523 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 524 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 525 526 // command_type 527 command[pos++] = connection->command_type; 528 // subunit_type | subunit ID 529 command[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 530 // opcode 531 command[pos++] = (uint8_t)connection->command_opcode; 532 } 533 534 if (packet_type == AVRCP_SINGLE_PACKET){ 535 // operands 536 (void)memcpy(command + pos, connection->cmd_operands, 537 connection->cmd_operands_length); 538 pos += connection->cmd_operands_length; 539 } else { 540 uint16_t bytes_free = AVRCP_CMD_BUFFER_SIZE - pos; 541 uint16_t bytes_to_store = connection->cmd_operands_fragmented_len-connection->cmd_operands_fragmented_pos; 542 uint16_t bytes_to_copy = btstack_min(bytes_to_store, bytes_free); 543 (void)memcpy(command + pos, 544 &connection->cmd_operands_fragmented_buffer[connection->cmd_operands_fragmented_pos], 545 bytes_to_copy); 546 pos += bytes_to_copy; 547 connection->cmd_operands_fragmented_pos += bytes_to_copy; 548 } 549 550 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 551 } 552 553 static int avrcp_send_register_notification(avrcp_connection_t * connection, uint8_t event_id){ 554 uint8_t command[18]; 555 uint16_t pos = 0; 556 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 557 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 558 command[pos++] = (connection->transaction_id << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 559 560 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 561 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 562 command[pos++] = AVRCP_CTYPE_NOTIFY; 563 command[pos++] = (AVRCP_SUBUNIT_TYPE_PANEL << 3) | AVRCP_SUBUNIT_ID; 564 command[pos++] = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 565 566 big_endian_store_24(command, pos, BT_SIG_COMPANY_ID); 567 pos += 3; 568 command[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 569 command[pos++] = 0; // reserved(upper 6) | packet_type -> 0 570 big_endian_store_16(command, pos, 5); // parameter length 571 pos += 2; 572 command[pos++] = event_id; 573 big_endian_store_32(command, pos, 1); // send notification on playback position every second, for other notifications it is ignored 574 pos += 4; 575 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 576 } 577 578 static void avrcp_press_and_hold_timeout_handler(btstack_timer_source_t * timer){ 579 UNUSED(timer); 580 avrcp_connection_t * connection = (avrcp_connection_t*) btstack_run_loop_get_timer_context(timer); 581 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 582 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 583 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 584 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 585 } 586 587 static void avrcp_press_and_hold_timer_start(avrcp_connection_t * connection){ 588 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 589 btstack_run_loop_set_timer_handler(&connection->press_and_hold_cmd_timer, avrcp_press_and_hold_timeout_handler); 590 btstack_run_loop_set_timer_context(&connection->press_and_hold_cmd_timer, connection); 591 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 592 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 593 } 594 595 static void avrcp_press_and_hold_timer_stop(avrcp_connection_t * connection){ 596 connection->press_and_hold_cmd_active = false; 597 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 598 } 599 600 601 static uint8_t avrcp_controller_request_pass_through_release_control_cmd(avrcp_connection_t * connection){ 602 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 603 if (connection->press_and_hold_cmd_active){ 604 avrcp_press_and_hold_timer_stop(connection); 605 } 606 connection->cmd_operands[0] = 0x80 | connection->cmd_operands[0]; 607 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 608 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 609 return ERROR_CODE_SUCCESS; 610 } 611 612 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){ 613 log_info("Send command %d", opid); 614 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 615 if (!connection){ 616 log_error("Could not find a connection. avrcp cid 0x%02x", avrcp_cid); 617 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 618 } 619 620 if (connection->state != AVCTP_CONNECTION_OPENED){ 621 log_error("Connection in wrong state %d, expected %d. avrcp cid 0x%02x", connection->state, AVCTP_CONNECTION_OPENED, avrcp_cid); 622 return ERROR_CODE_COMMAND_DISALLOWED; 623 } 624 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 625 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 626 connection->command_type = AVRCP_CTYPE_CONTROL; 627 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 628 connection->subunit_id = AVRCP_SUBUNIT_ID; 629 connection->cmd_operands_length = 0; 630 631 connection->press_and_hold_cmd_active = continuous_cmd; 632 connection->cmd_operands_length = 2; 633 connection->cmd_operands[0] = opid; 634 if (playback_speed > 0){ 635 connection->cmd_operands[2] = playback_speed; 636 connection->cmd_operands_length++; 637 } 638 connection->cmd_operands[1] = connection->cmd_operands_length - 2; 639 640 if (connection->press_and_hold_cmd_active){ 641 avrcp_press_and_hold_timer_start(connection); 642 } 643 644 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 645 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 646 return ERROR_CODE_SUCCESS; 647 } 648 649 static uint8_t request_single_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 650 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, false); 651 } 652 653 static uint8_t request_continuous_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 654 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, true); 655 } 656 657 static void avrcp_controller_get_capabilities_for_connection(avrcp_connection_t * connection, uint8_t capability_id){ 658 connection->state = AVCTP_W2_SEND_COMMAND; 659 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 660 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 661 connection->command_type = AVRCP_CTYPE_STATUS; 662 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 663 connection->subunit_id = AVRCP_SUBUNIT_ID; 664 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 665 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_CAPABILITIES; // PDU ID 666 connection->cmd_operands[4] = 0; 667 big_endian_store_16(connection->cmd_operands, 5, 1); // parameter length 668 connection->cmd_operands[7] = capability_id; // capability ID 669 connection->cmd_operands_length = 8; 670 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 671 } 672 673 static uint8_t avrcp_controller_register_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 674 if (connection->remote_supported_notifications_queried && (connection->remote_supported_notifications & (1 << event_id)) == 0){ 675 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 676 } 677 if ( (connection->notifications_to_deregister & (1 << event_id)) != 0){ 678 return ERROR_CODE_COMMAND_DISALLOWED; 679 } 680 if ( (connection->notifications_enabled & (1 << event_id)) != 0){ 681 return ERROR_CODE_SUCCESS; 682 } 683 if ( (connection->notifications_to_register & (1 << event_id)) != 0){ 684 return ERROR_CODE_SUCCESS; 685 } 686 687 connection->notifications_to_register |= (1 << event_id); 688 689 if (!connection->remote_supported_notifications_queried){ 690 connection->remote_supported_notifications_suppress_emit_result = true; 691 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 692 return ERROR_CODE_SUCCESS; 693 } 694 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 695 return ERROR_CODE_SUCCESS; 696 } 697 698 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 699 connection->state = AVCTP_W2_SEND_COMMAND; 700 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 701 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 702 connection->command_type = AVRCP_CTYPE_CONTROL; 703 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 704 connection->subunit_id = AVRCP_SUBUNIT_ID; 705 int pos = 0; 706 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 707 pos += 3; 708 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE; // PDU ID 709 connection->cmd_operands[pos++] = 0; 710 // Parameter Length 711 connection->cmd_operands_length = 8; 712 big_endian_store_16(connection->cmd_operands, pos, 1); 713 pos += 2; 714 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 715 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 716 return ERROR_CODE_SUCCESS; 717 } 718 719 720 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 721 connection->state = AVCTP_W2_SEND_COMMAND; 722 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 723 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 724 connection->command_type = AVRCP_CTYPE_CONTROL; 725 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 726 connection->subunit_id = AVRCP_SUBUNIT_ID; 727 int pos = 0; 728 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 729 pos += 3; 730 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE; // PDU ID 731 connection->cmd_operands[pos++] = 0; 732 // Parameter Length 733 connection->cmd_operands_length = 8; 734 big_endian_store_16(connection->cmd_operands, pos, 1); 735 pos += 2; 736 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 737 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 738 return ERROR_CODE_SUCCESS; 739 } 740 741 static void avrcp_controller_handle_notification(avrcp_connection_t *connection, avrcp_command_type_t ctype, uint8_t *payload, uint16_t size) { 742 if (size < 1) return; 743 uint16_t pos = 0; 744 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) payload[pos++]; 745 uint16_t event_mask = (1 << event_id); 746 uint16_t reset_event_mask = ~event_mask; 747 748 switch (ctype){ 749 case AVRCP_CTYPE_RESPONSE_INTERIM: 750 // register as enabled 751 connection->notifications_enabled |= event_mask; 752 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id); 753 // check if initial value is already sent 754 if ( (connection->initial_status_reported & event_mask) > 0 ){ 755 return; 756 } 757 connection->initial_status_reported |= event_mask; 758 break; 759 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 760 // received change, event is considered de-registered 761 // we are re-enabling it automatically, if it is not 762 // explicitly disabled 763 connection->notifications_enabled &= reset_event_mask; 764 if (! (connection->notifications_to_deregister & event_mask)){ 765 avrcp_controller_register_notification(connection, event_id); 766 } else { 767 connection->notifications_to_deregister &= reset_event_mask; 768 } 769 break; 770 default: 771 connection->notifications_to_register &= reset_event_mask; 772 connection->notifications_enabled &= reset_event_mask; 773 connection->notifications_to_deregister &= reset_event_mask; 774 break; 775 } 776 777 avrcp_controller_emit_notification_for_event_id(connection->avrcp_cid, event_id, ctype, payload + pos, size - pos); 778 } 779 780 #ifdef ENABLE_AVCTP_FRAGMENTATION 781 static void avctp_reassemble_message(avrcp_connection_t * connection, avctp_packet_type_t packet_type, uint8_t *packet, uint16_t size){ 782 // after header (transaction label and packet type) 783 uint16_t pos; 784 uint16_t bytes_to_store; 785 786 switch (packet_type){ 787 case AVCTP_START_PACKET: 788 if (size < 2) return; 789 790 // store header 791 pos = 0; 792 connection->avctp_reassembly_buffer[pos] = packet[pos]; 793 pos++; 794 connection->avctp_reassembly_size = pos; 795 796 // NOTE: num packets not needed for reassembly, ignoring it does not pose security risk -> no need to store it 797 pos++; 798 799 // PID in reassembled packet is at offset 1, it will be read later after the avctp_reassemble_message with AVCTP_END_PACKET is called 800 801 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 802 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 803 connection->avctp_reassembly_size += bytes_to_store; 804 break; 805 806 case AVCTP_CONTINUE_PACKET: 807 case AVCTP_END_PACKET: 808 if (size < 1) return; 809 810 // store remaining data, ignore header 811 pos = 1; 812 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 813 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 814 connection->avctp_reassembly_size += bytes_to_store; 815 break; 816 817 default: 818 return; 819 } 820 } 821 #endif 822 823 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 824 if (size < 6u) return; 825 uint8_t pdu_id; 826 avrcp_packet_type_t vendor_dependent_packet_type; 827 828 uint16_t pos = 0; 829 connection->last_confirmed_transaction_id = packet[pos] >> 4; 830 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((packet[pos] >> 1) & 0x01); 831 avctp_packet_type_t packet_type = (avctp_packet_type_t)((packet[pos] >> 2) & 0x03); 832 pos++; 833 834 if (frame_type != AVRCP_RESPONSE_FRAME) return; 835 836 switch (packet_type){ 837 case AVCTP_SINGLE_PACKET: 838 break; 839 840 #ifdef ENABLE_AVCTP_FRAGMENTATION 841 case AVCTP_START_PACKET: 842 case AVCTP_CONTINUE_PACKET: 843 avctp_reassemble_message(connection, packet_type, packet, size); 844 return; 845 846 case AVCTP_END_PACKET: 847 avctp_reassemble_message(connection, packet_type, packet, size); 848 849 packet = connection->avctp_reassembly_buffer; 850 size = connection->avctp_reassembly_size; 851 break; 852 #endif 853 854 default: 855 return; 856 } 857 858 pos += 2; // PID 859 860 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 861 862 #ifdef ENABLE_LOG_INFO 863 uint8_t byte_value = packet[pos]; 864 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 865 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 866 #endif 867 pos++; 868 869 uint8_t opcode = packet[pos++]; 870 uint16_t param_length; 871 872 switch (opcode){ 873 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 874 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 875 connection->state = AVCTP_CONNECTION_OPENED; 876 877 #ifdef ENABLE_LOG_INFO 878 // page, extension code (1) 879 pos++; 880 uint8_t unit_type = packet[pos] >> 3; 881 uint8_t max_subunit_ID = packet[pos] & 0x07; 882 log_info("SUBUNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, max_subunit_ID %d", ctype, subunit_type, subunit_id, opcode, unit_type, max_subunit_ID); 883 #endif 884 break; 885 } 886 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 887 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 888 connection->state = AVCTP_CONNECTION_OPENED; 889 890 #ifdef ENABLE_LOG_INFO 891 // byte value 7 (1) 892 pos++; 893 uint8_t unit_type = packet[pos] >> 3; 894 uint8_t unit = packet[pos] & 0x07; 895 pos++; 896 uint32_t company_id = big_endian_read_24(packet, pos); 897 log_info("UNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, unit %d, company_id 0x%06" PRIx32, 898 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 899 #endif 900 break; 901 } 902 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 903 904 if ((size - pos) < 7) return; 905 906 // Company ID (3) 907 pos += 3; 908 pdu_id = packet[pos++]; 909 vendor_dependent_packet_type = (avrcp_packet_type_t)(packet[pos++] & 0x03); 910 param_length = big_endian_read_16(packet, pos); 911 pos += 2; 912 913 if ((size - pos) < param_length) return; 914 915 // handle asynchronous notifications, without changing state 916 if (pdu_id == AVRCP_PDU_ID_REGISTER_NOTIFICATION){ 917 avrcp_controller_handle_notification(connection, ctype, packet + pos, size - pos); 918 break; 919 } 920 921 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE){ 922 log_info("AVRCP_CMD_OPCODE_VENDOR_DEPENDENT state %d", connection->state); 923 return; 924 } 925 connection->state = AVCTP_CONNECTION_OPENED; 926 927 log_info("VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 928 switch (pdu_id){ 929 case AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE:{ 930 uint8_t num_attributes = packet[pos++]; 931 int i; 932 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 933 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 934 for (i = 0; i < num_attributes; i++){ 935 uint8_t attribute_id = packet[pos++]; 936 uint8_t value = packet[pos++]; 937 switch (attribute_id){ 938 case 0x02: 939 repeat_mode = (avrcp_repeat_mode_t) value; 940 break; 941 case 0x03: 942 shuffle_mode = (avrcp_shuffle_mode_t) value; 943 break; 944 default: 945 break; 946 } 947 } 948 avrcp_controller_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 949 break; 950 } 951 952 case AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE:{ 953 uint16_t offset = 0; 954 uint8_t event[6]; 955 event[offset++] = HCI_EVENT_AVRCP_META; 956 event[offset++] = sizeof(event) - 2; 957 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 958 little_endian_store_16(event, offset, connection->avrcp_cid); 959 offset += 2; 960 event[offset++] = ctype; 961 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 962 break; 963 } 964 965 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 966 uint16_t offset = 0; 967 uint8_t event[7]; 968 event[offset++] = HCI_EVENT_AVRCP_META; 969 event[offset++] = sizeof(event) - 2; 970 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 971 little_endian_store_16(event, offset, connection->avrcp_cid); 972 offset += 2; 973 event[offset++] = ctype; 974 event[offset++] = packet[pos++]; 975 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 976 break; 977 } 978 979 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 980 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 981 uint8_t capability_count = 0; 982 if (param_length > 1){ 983 capability_count = packet[pos++]; 984 } 985 uint16_t i; 986 uint16_t offset = 0; 987 uint8_t event[10]; 988 989 switch (capability_id){ 990 991 case AVRCP_CAPABILITY_ID_COMPANY: 992 for (i = 0; (i < capability_count) && ((size - pos) >= 3); i++){ 993 uint32_t company_id = big_endian_read_24(packet, pos); 994 pos += 3; 995 log_info(" 0x%06" PRIx32 ", ", company_id); 996 997 offset = 0; 998 event[offset++] = HCI_EVENT_AVRCP_META; 999 event[offset++] = sizeof(event) - 2; 1000 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID; 1001 little_endian_store_16(event, offset, connection->avrcp_cid); 1002 offset += 2; 1003 event[offset++] = ctype; 1004 event[offset++] = 0; 1005 little_endian_store_24(event, offset, company_id); 1006 offset += 3; 1007 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1008 } 1009 1010 offset = 0; 1011 event[offset++] = HCI_EVENT_AVRCP_META; 1012 event[offset++] = sizeof(event) - 2; 1013 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID_DONE; 1014 little_endian_store_16(event, offset, connection->avrcp_cid); 1015 offset += 2; 1016 event[offset++] = ctype; 1017 event[offset++] = 0; 1018 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1019 break; 1020 1021 case AVRCP_CAPABILITY_ID_EVENT: 1022 for (i = 0; (i < capability_count) && ((size - pos) >= 1); i++){ 1023 uint8_t event_id = packet[pos++]; 1024 connection->remote_supported_notifications |= (1 << event_id); 1025 } 1026 if (connection->remote_supported_notifications_suppress_emit_result){ 1027 connection->remote_supported_notifications_suppress_emit_result = false; 1028 break; 1029 } 1030 avrcp_controller_emit_supported_events(connection); 1031 break; 1032 1033 default: 1034 // ignore 1035 break; 1036 } 1037 break; 1038 } 1039 1040 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 1041 uint32_t song_length = big_endian_read_32(packet, pos); 1042 pos += 4; 1043 uint32_t song_position = big_endian_read_32(packet, pos); 1044 pos += 4; 1045 uint8_t play_status = packet[pos]; 1046 1047 uint8_t event[15]; 1048 int offset = 0; 1049 event[offset++] = HCI_EVENT_AVRCP_META; 1050 event[offset++] = sizeof(event) - 2; 1051 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 1052 little_endian_store_16(event, offset, connection->avrcp_cid); 1053 offset += 2; 1054 event[offset++] = ctype; 1055 little_endian_store_32(event, offset, song_length); 1056 offset += 4; 1057 little_endian_store_32(event, offset, song_position); 1058 offset += 4; 1059 event[offset++] = play_status; 1060 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1061 break; 1062 } 1063 1064 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 1065 switch (vendor_dependent_packet_type){ 1066 case AVRCP_START_PACKET: 1067 case AVRCP_SINGLE_PACKET: 1068 avrcp_parser_reset(connection); 1069 connection->list_size = param_length; 1070 connection->num_attributes = packet[pos++]; 1071 1072 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1073 if (vendor_dependent_packet_type == AVRCP_START_PACKET){ 1074 avrcp_controller_request_continue_response(connection); 1075 } 1076 break; 1077 case AVRCP_CONTINUE_PACKET: 1078 case AVRCP_END_PACKET: 1079 connection->num_received_fragments++; 1080 1081 if (connection->num_received_fragments < connection->max_num_fragments){ 1082 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1083 1084 if (vendor_dependent_packet_type == AVRCP_CONTINUE_PACKET){ 1085 avrcp_controller_request_continue_response(connection); 1086 } 1087 } else { 1088 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 1089 avrcp_parser_reset(connection); 1090 avrcp_controller_request_abort_continuation(connection); 1091 } 1092 break; 1093 default: 1094 // TODO check 1095 btstack_assert(false); 1096 break; 1097 } 1098 } 1099 default: 1100 break; 1101 } 1102 break; 1103 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 1104 if ((size - pos) < 1) return; 1105 uint8_t operation_id = packet[pos++]; 1106 switch (connection->state){ 1107 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1108 // trigger release for simple command: 1109 if (!connection->press_and_hold_cmd_active){ 1110 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1111 break; 1112 } 1113 // for press and hold, send release if it just has been requested, otherwise, wait for next repeat 1114 if (connection->press_and_hold_cmd_release){ 1115 connection->press_and_hold_cmd_release = false; 1116 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1117 } else { 1118 connection->state = AVCTP_W4_STOP; 1119 } 1120 break; 1121 case AVCTP_W2_RECEIVE_RESPONSE: 1122 connection->state = AVCTP_CONNECTION_OPENED; 1123 break; 1124 default: 1125 break; 1126 } 1127 if (connection->state == AVCTP_W4_STOP){ 1128 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 1129 } 1130 if (connection->state == AVCTP_CONNECTION_OPENED) { 1131 // RELEASE response 1132 operation_id = operation_id & 0x7F; 1133 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 1134 } 1135 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 1136 // PRESS response 1137 avrcp_controller_request_pass_through_release_control_cmd(connection); 1138 } 1139 break; 1140 } 1141 default: 1142 break; 1143 } 1144 1145 // trigger pending notification reqistrations 1146 if ((connection->state == AVCTP_CONNECTION_OPENED) && connection->notifications_to_register){ 1147 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1148 } 1149 } 1150 1151 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 1152 switch (connection->state){ 1153 case AVCTP_W2_SEND_PRESS_COMMAND: 1154 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 1155 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 1156 return; 1157 case AVCTP_W2_SEND_COMMAND: 1158 case AVCTP_W2_SEND_RELEASE_COMMAND: 1159 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1160 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 1161 return; 1162 case AVCTP_W2_SEND_FRAGMENTED_COMMAND: 1163 if (connection->cmd_operands_fragmented_pos == 0){ 1164 avrcp_send_cmd(connection, AVRCP_START_PACKET); 1165 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1166 } else { 1167 if ((connection->cmd_operands_fragmented_len - connection->cmd_operands_fragmented_pos) > avrcp_get_max_payload_size_for_packet_type(AVRCP_CONTINUE_PACKET)){ 1168 avrcp_send_cmd(connection, AVRCP_CONTINUE_PACKET); 1169 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1170 } else { 1171 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1172 avrcp_send_cmd(connection, AVRCP_END_PACKET); 1173 } 1174 } 1175 return; 1176 default: 1177 break; 1178 } 1179 // send register notification if queued 1180 if (connection->notifications_to_register != 0){ 1181 uint8_t event_id; 1182 for (event_id = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t)AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 1183 if (connection->notifications_to_register & (1<<event_id)){ 1184 connection->notifications_to_register &= ~ (1 << event_id); 1185 avrcp_send_register_notification(connection, event_id); 1186 return; 1187 } 1188 } 1189 } 1190 } 1191 1192 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1193 avrcp_connection_t * connection; 1194 1195 switch (packet_type) { 1196 case L2CAP_DATA_PACKET: 1197 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1198 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1199 break; 1200 1201 case HCI_EVENT_PACKET: 1202 switch (hci_event_packet_get_type(packet)){ 1203 case L2CAP_EVENT_CAN_SEND_NOW: 1204 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1205 avrcp_controller_handle_can_send_now(connection); 1206 break; 1207 default: 1208 break; 1209 } 1210 default: 1211 break; 1212 } 1213 } 1214 1215 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){ 1216 avrcp_create_sdp_record(1, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 1217 } 1218 1219 void avrcp_controller_init(void){ 1220 avrcp_controller_context.role = AVRCP_CONTROLLER; 1221 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 1222 avrcp_register_controller_packet_handler(&avrcp_controller_packet_handler); 1223 } 1224 1225 void avrcp_controller_deinit(void){ 1226 memset(&avrcp_controller_context, 0, sizeof(avrcp_context_t)); 1227 } 1228 1229 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 1230 btstack_assert(callback != NULL); 1231 avrcp_controller_context.avrcp_callback = callback; 1232 } 1233 1234 1235 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 1236 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1237 } 1238 1239 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 1240 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1241 } 1242 1243 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 1244 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1245 } 1246 1247 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 1248 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1249 } 1250 1251 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 1252 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1253 } 1254 1255 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 1256 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1257 } 1258 1259 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1260 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1261 } 1262 1263 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1264 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1265 } 1266 1267 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1268 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1269 } 1270 1271 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1272 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1273 } 1274 1275 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1276 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1277 } 1278 1279 /* start continuous cmds */ 1280 1281 uint8_t avrcp_controller_start_press_and_hold_cmd(uint16_t avrcp_cid, avrcp_operation_id_t operation_id){ 1282 return request_continuous_pass_through_press_control_cmd(avrcp_cid, operation_id, 0); 1283 } 1284 1285 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1286 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1287 } 1288 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1289 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1290 } 1291 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1292 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1293 } 1294 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1295 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1296 } 1297 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1298 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1299 } 1300 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1301 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1302 } 1303 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1304 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1305 } 1306 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1307 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1308 } 1309 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1310 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1311 } 1312 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1313 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1314 } 1315 1316 /* stop continuous cmds */ 1317 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1318 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1319 if (!connection){ 1320 log_error("avrcp_stop_play: could not find a connection."); 1321 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1322 } 1323 1324 switch (connection->state){ 1325 // respond when we receive response for (repeated) press command 1326 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1327 connection->press_and_hold_cmd_release = true; 1328 break; 1329 1330 // release already sent or on the way, nothing to do 1331 case AVCTP_W2_RECEIVE_RESPONSE: 1332 case AVCTP_W2_SEND_RELEASE_COMMAND: 1333 break; 1334 1335 // about to send next repeated press command or wait for it -> release right away 1336 case AVCTP_W2_SEND_PRESS_COMMAND: 1337 case AVCTP_W4_STOP: 1338 return avrcp_controller_request_pass_through_release_control_cmd(connection); 1339 1340 // otherwise reject request 1341 default: 1342 return ERROR_CODE_COMMAND_DISALLOWED; 1343 } 1344 return ERROR_CODE_SUCCESS; 1345 } 1346 1347 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1348 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1349 if (!connection){ 1350 log_error("avrcp_get_play_status: could not find a connection."); 1351 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1352 } 1353 return avrcp_controller_register_notification(connection, event_id); 1354 } 1355 1356 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1357 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1358 if (!connection){ 1359 log_error("avrcp_get_play_status: could not find a connection."); 1360 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1361 } 1362 connection->notifications_to_deregister |= (1 << event_id); 1363 return ERROR_CODE_SUCCESS; 1364 } 1365 1366 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 1367 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1368 if (!connection){ 1369 log_error("avrcp_unit_info: could not find a connection."); 1370 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1371 } 1372 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1373 connection->state = AVCTP_W2_SEND_COMMAND; 1374 1375 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1376 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 1377 connection->command_type = AVRCP_CTYPE_STATUS; 1378 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 1379 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 1380 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 1381 connection->cmd_operands_length = 5; 1382 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1383 return ERROR_CODE_SUCCESS; 1384 } 1385 1386 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 1387 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1388 if (!connection){ 1389 log_error("avrcp_unit_info: could not find a connection."); 1390 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1391 } 1392 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1393 connection->state = AVCTP_W2_SEND_COMMAND; 1394 1395 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1396 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 1397 connection->command_type = AVRCP_CTYPE_STATUS; 1398 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 1399 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 1400 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 1401 connection->cmd_operands[0] = 7; // page: 0, extention_code: 7 1402 connection->cmd_operands_length = 5; 1403 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1404 return ERROR_CODE_SUCCESS; 1405 } 1406 1407 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 1408 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1409 if (!connection){ 1410 log_error("avrcp_get_capabilities: could not find a connection."); 1411 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1412 } 1413 if (connection->state != AVCTP_CONNECTION_OPENED){ 1414 return ERROR_CODE_COMMAND_DISALLOWED; 1415 } 1416 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_COMPANY); 1417 return ERROR_CODE_SUCCESS; 1418 } 1419 1420 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 1421 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1422 if (!connection){ 1423 log_error("avrcp_get_capabilities: could not find a connection."); 1424 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1425 } 1426 if (connection->state != AVCTP_CONNECTION_OPENED){ 1427 return ERROR_CODE_COMMAND_DISALLOWED; 1428 } 1429 1430 if (!connection->remote_supported_notifications_queried){ 1431 connection->remote_supported_notifications_queried = true; 1432 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 1433 return ERROR_CODE_SUCCESS; 1434 } 1435 1436 avrcp_controller_emit_supported_events(connection); 1437 return ERROR_CODE_SUCCESS; 1438 } 1439 1440 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1441 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1442 if (!connection){ 1443 log_error("avrcp_get_play_status: could not find a connection."); 1444 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1445 } 1446 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1447 connection->state = AVCTP_W2_SEND_COMMAND; 1448 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1449 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1450 connection->command_type = AVRCP_CTYPE_STATUS; 1451 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1452 connection->subunit_id = AVRCP_SUBUNIT_ID; 1453 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1454 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_PLAY_STATUS; 1455 connection->cmd_operands[4] = 0; // reserved(upper 6) | packet_type -> 0 1456 big_endian_store_16(connection->cmd_operands, 5, 0); // parameter length 1457 connection->cmd_operands_length = 7; 1458 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1459 return ERROR_CODE_SUCCESS; 1460 } 1461 1462 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1463 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1464 if (!connection){ 1465 log_error("avrcp_get_capabilities: could not find a connection."); 1466 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1467 } 1468 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1469 connection->state = AVCTP_W2_SEND_COMMAND; 1470 1471 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1472 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1473 connection->command_type = AVRCP_CTYPE_CONTROL; 1474 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1475 connection->subunit_id = AVRCP_SUBUNIT_ID; 1476 int pos = 0; 1477 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1478 pos += 3; 1479 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ADDRESSED_PLAYER; // PDU ID 1480 connection->cmd_operands[pos++] = 0; 1481 1482 // Parameter Length 1483 big_endian_store_16(connection->cmd_operands, pos, 2); 1484 pos += 2; 1485 1486 big_endian_store_16(connection->cmd_operands, pos, addressed_player_id); 1487 pos += 2; 1488 1489 connection->cmd_operands_length = pos; 1490 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1491 return ERROR_CODE_SUCCESS; 1492 } 1493 1494 uint8_t avrcp_controller_get_element_attributes(uint16_t avrcp_cid, uint8_t num_attributes, avrcp_media_attribute_id_t * attributes){ 1495 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1496 if (!connection){ 1497 log_error("avrcp_get_capabilities: could not find a connection."); 1498 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1499 } 1500 1501 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1502 1503 if (num_attributes >= AVRCP_MEDIA_ATTR_RESERVED) { 1504 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 1505 } 1506 connection->state = AVCTP_W2_SEND_COMMAND; 1507 1508 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1509 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1510 connection->command_type = AVRCP_CTYPE_STATUS; 1511 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1512 connection->subunit_id = AVRCP_SUBUNIT_ID; 1513 int pos = 0; 1514 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1515 pos += 3; 1516 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; // PDU ID 1517 connection->cmd_operands[pos++] = 0; 1518 1519 // Parameter Length 1520 big_endian_store_16(connection->cmd_operands, pos, 9); 1521 pos += 2; 1522 1523 // write 8 bytes value 1524 memset(connection->cmd_operands + pos, 0, 8); // identifier: PLAYING 1525 pos += 8; 1526 1527 connection->cmd_operands[pos++] = num_attributes; // attribute count, if 0 get all attributes 1528 1529 int i; 1530 for (i = 0; i < num_attributes; i++){ 1531 // every attribute is 4 bytes long 1532 big_endian_store_32(connection->cmd_operands, pos, attributes[i]); 1533 pos += 4; 1534 } 1535 1536 connection->cmd_operands_length = pos; 1537 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1538 return ERROR_CODE_SUCCESS; 1539 } 1540 1541 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1542 return avrcp_controller_get_element_attributes(avrcp_cid, 0, NULL); 1543 } 1544 1545 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1546 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1547 if (!connection){ 1548 log_error("avrcp_get_capabilities: could not find a connection."); 1549 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1550 } 1551 1552 // 1553 // allow sending of multiple set abs volume commands without waiting for response 1554 // 1555 uint8_t status = ERROR_CODE_COMMAND_DISALLOWED; 1556 switch (connection->state){ 1557 case AVCTP_CONNECTION_OPENED: 1558 status = ERROR_CODE_SUCCESS; 1559 break; 1560 case AVCTP_W2_RECEIVE_RESPONSE: 1561 // - is pending response also set abs volume 1562 if (connection->command_opcode != AVRCP_CMD_OPCODE_VENDOR_DEPENDENT) break; 1563 if (connection->command_type != AVRCP_CTYPE_CONTROL) break; 1564 if (connection->subunit_type != AVRCP_SUBUNIT_TYPE_PANEL) break; 1565 if (connection->subunit_id != AVRCP_SUBUNIT_ID) break; 1566 if (connection->cmd_operands[3] != AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME) break; 1567 // - is next transaction id valid in window 1568 if (avrcp_controller_is_transaction_id_valid(connection, avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter)) == false) break; 1569 status = ERROR_CODE_SUCCESS; 1570 break; 1571 default: 1572 break; 1573 } 1574 if (status != ERROR_CODE_SUCCESS) return status; 1575 1576 connection->state = AVCTP_W2_SEND_COMMAND; 1577 1578 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1579 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1580 connection->command_type = AVRCP_CTYPE_CONTROL; 1581 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1582 connection->subunit_id = AVRCP_SUBUNIT_ID; 1583 int pos = 0; 1584 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1585 pos += 3; 1586 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME; // PDU ID 1587 connection->cmd_operands[pos++] = 0; 1588 1589 // Parameter Length 1590 big_endian_store_16(connection->cmd_operands, pos, 1); 1591 pos += 2; 1592 connection->cmd_operands[pos++] = volume; 1593 1594 connection->cmd_operands_length = pos; 1595 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1596 return ERROR_CODE_SUCCESS; 1597 } 1598 1599 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 1600 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1601 if (!connection){ 1602 log_error("avrcp_get_capabilities: could not find a connection."); 1603 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1604 } 1605 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1606 connection->state = AVCTP_W2_SEND_COMMAND; 1607 1608 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1609 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1610 connection->command_type = AVRCP_CTYPE_STATUS; 1611 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1612 connection->subunit_id = AVRCP_SUBUNIT_ID; 1613 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1614 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE; // PDU ID 1615 connection->cmd_operands[4] = 0; 1616 big_endian_store_16(connection->cmd_operands, 5, 5); // parameter length 1617 connection->cmd_operands[7] = 4; // NumPlayerApplicationSettingAttributeID 1618 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1619 connection->cmd_operands[8] = 0x01; // equalizer (1-OFF, 2-ON) 1620 connection->cmd_operands[9] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1621 connection->cmd_operands[10] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1622 connection->cmd_operands[11] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1623 connection->cmd_operands_length = 12; 1624 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1625 return ERROR_CODE_SUCCESS; 1626 } 1627 1628 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1629 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1630 if (!connection){ 1631 log_error("avrcp_get_capabilities: could not find a connection."); 1632 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1633 } 1634 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1635 connection->state = AVCTP_W2_SEND_COMMAND; 1636 1637 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1638 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1639 connection->command_type = AVRCP_CTYPE_CONTROL; 1640 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1641 connection->subunit_id = AVRCP_SUBUNIT_ID; 1642 int pos = 0; 1643 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1644 pos += 3; 1645 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE; // PDU ID 1646 connection->cmd_operands[pos++] = 0; 1647 // Parameter Length 1648 big_endian_store_16(connection->cmd_operands, pos, 3); 1649 pos += 2; 1650 connection->cmd_operands[pos++] = 2; 1651 connection->cmd_operands_length = pos; 1652 connection->cmd_operands[pos++] = attr_id; 1653 connection->cmd_operands[pos++] = attr_value; 1654 connection->cmd_operands_length = pos; 1655 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1656 return ERROR_CODE_SUCCESS; 1657 } 1658 1659 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1660 if ((mode < AVRCP_SHUFFLE_MODE_OFF) || (mode > AVRCP_SHUFFLE_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1661 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1662 } 1663 1664 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1665 if ((mode < AVRCP_REPEAT_MODE_OFF) || (mode > AVRCP_REPEAT_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1666 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1667 } 1668 1669 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1670 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1671 if (!connection){ 1672 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1673 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1674 } 1675 if (connection->state != AVCTP_CONNECTION_OPENED){ 1676 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1677 return ERROR_CODE_COMMAND_DISALLOWED; 1678 } 1679 connection->state = AVCTP_W2_SEND_COMMAND; 1680 1681 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1682 connection->command_type = AVRCP_CTYPE_CONTROL; 1683 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1684 connection->subunit_id = AVRCP_SUBUNIT_ID; 1685 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1686 int pos = 0; 1687 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1688 pos += 3; 1689 connection->cmd_operands[pos++] = AVRCP_PDU_ID_PLAY_ITEM; // PDU ID 1690 // reserved 1691 connection->cmd_operands[pos++] = 0; 1692 // Parameter Length 1693 big_endian_store_16(connection->cmd_operands, pos, 11); 1694 pos += 2; 1695 connection->cmd_operands[pos++] = scope; 1696 memset(&connection->cmd_operands[pos], 0, 8); 1697 if (uid){ 1698 (void)memcpy(&connection->cmd_operands[pos], uid, 8); 1699 } 1700 pos += 8; 1701 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1702 pos += 2; 1703 connection->cmd_operands_length = pos; 1704 1705 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1706 return ERROR_CODE_SUCCESS; 1707 } 1708 1709 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){ 1710 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1711 if (!connection){ 1712 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1713 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1714 } 1715 if (connection->state != AVCTP_CONNECTION_OPENED){ 1716 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1717 return ERROR_CODE_COMMAND_DISALLOWED; 1718 } 1719 connection->state = AVCTP_W2_SEND_COMMAND; 1720 1721 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1722 connection->command_type = AVRCP_CTYPE_CONTROL; 1723 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1724 connection->subunit_id = AVRCP_SUBUNIT_ID; 1725 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1726 int pos = 0; 1727 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1728 pos += 3; 1729 connection->cmd_operands[pos++] = AVRCP_PDU_ID_ADD_TO_NOW_PLAYING; // PDU ID 1730 // reserved 1731 connection->cmd_operands[pos++] = 0; 1732 // Parameter Length 1733 big_endian_store_16(connection->cmd_operands, pos, 11); 1734 pos += 2; 1735 connection->cmd_operands[pos++] = scope; 1736 memset(&connection->cmd_operands[pos], 0, 8); 1737 if (uid){ 1738 (void)memcpy(&connection->cmd_operands[pos], uid, 8); 1739 } 1740 pos += 8; 1741 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1742 pos += 2; 1743 connection->cmd_operands_length = pos; 1744 1745 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1746 return ERROR_CODE_SUCCESS; 1747 } 1748 1749 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1750 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1751 if (!connection){ 1752 log_error("avrcp_controller_play_item: could not find a connection."); 1753 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1754 } 1755 connection->max_num_fragments = max_num_fragments; 1756 return ERROR_CODE_SUCCESS; 1757 } 1758 1759 uint8_t avrcp_controller_send_custom_command(uint16_t avrcp_cid, avrcp_command_type_t command_type, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t command_opcode, const uint8_t * command_buffer, uint16_t command_len){ 1760 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1761 if (!connection){ 1762 log_error("avrcp_controller_play_item: could not find a connection."); 1763 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1764 } 1765 1766 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1767 connection->state = AVCTP_W2_SEND_FRAGMENTED_COMMAND; 1768 1769 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1770 connection->command_opcode = command_opcode; 1771 connection->command_type = command_type; 1772 connection->subunit_type = subunit_type; 1773 connection->subunit_id = subunit_id; 1774 connection->cmd_operands_fragmented_buffer = command_buffer; 1775 connection->cmd_operands_fragmented_pos = 0; 1776 connection->cmd_operands_fragmented_len = command_len; 1777 1778 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1779 return ERROR_CODE_SUCCESS; 1780 } 1781