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 connection->notifications_to_register |= (1 << event_id); 684 685 if (!connection->remote_supported_notifications_queried){ 686 connection->remote_supported_notifications_suppress_emit_result = true; 687 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 688 return ERROR_CODE_SUCCESS; 689 } 690 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 691 return ERROR_CODE_SUCCESS; 692 } 693 694 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 695 connection->state = AVCTP_W2_SEND_COMMAND; 696 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 697 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 698 connection->command_type = AVRCP_CTYPE_CONTROL; 699 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 700 connection->subunit_id = AVRCP_SUBUNIT_ID; 701 int pos = 0; 702 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 703 pos += 3; 704 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE; // PDU ID 705 connection->cmd_operands[pos++] = 0; 706 // Parameter Length 707 connection->cmd_operands_length = 8; 708 big_endian_store_16(connection->cmd_operands, pos, 1); 709 pos += 2; 710 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 711 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 712 return ERROR_CODE_SUCCESS; 713 } 714 715 716 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 717 connection->state = AVCTP_W2_SEND_COMMAND; 718 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 719 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 720 connection->command_type = AVRCP_CTYPE_CONTROL; 721 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 722 connection->subunit_id = AVRCP_SUBUNIT_ID; 723 int pos = 0; 724 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 725 pos += 3; 726 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE; // PDU ID 727 connection->cmd_operands[pos++] = 0; 728 // Parameter Length 729 connection->cmd_operands_length = 8; 730 big_endian_store_16(connection->cmd_operands, pos, 1); 731 pos += 2; 732 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 733 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 734 return ERROR_CODE_SUCCESS; 735 } 736 737 static void avrcp_controller_handle_notification(avrcp_connection_t *connection, avrcp_command_type_t ctype, uint8_t *payload, uint16_t size) { 738 if (size < 1) return; 739 uint16_t pos = 0; 740 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) payload[pos++]; 741 uint16_t event_mask = (1 << event_id); 742 uint16_t reset_event_mask = ~event_mask; 743 744 switch (ctype){ 745 case AVRCP_CTYPE_RESPONSE_INTERIM: 746 // register as enabled 747 connection->notifications_enabled |= event_mask; 748 749 // check if initial value is already sent 750 if ( (connection->initial_status_reported & event_mask) != 0 ){ 751 return; 752 } 753 // emit event only once, initially 754 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id); 755 connection->initial_status_reported |= event_mask; 756 break; 757 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 758 // received change, event is considered de-registered 759 // we are re-enabling it automatically, if it is not 760 // explicitly disabled 761 connection->notifications_enabled &= reset_event_mask; 762 if (! (connection->notifications_to_deregister & event_mask)){ 763 avrcp_controller_register_notification(connection, event_id); 764 } else { 765 connection->notifications_to_deregister &= reset_event_mask; 766 } 767 break; 768 default: 769 connection->notifications_to_register &= reset_event_mask; 770 connection->notifications_enabled &= reset_event_mask; 771 connection->notifications_to_deregister &= reset_event_mask; 772 break; 773 } 774 775 avrcp_controller_emit_notification_for_event_id(connection->avrcp_cid, event_id, ctype, payload + pos, size - pos); 776 } 777 778 #ifdef ENABLE_AVCTP_FRAGMENTATION 779 static void avctp_reassemble_message(avrcp_connection_t * connection, avctp_packet_type_t packet_type, uint8_t *packet, uint16_t size){ 780 // after header (transaction label and packet type) 781 uint16_t pos; 782 uint16_t bytes_to_store; 783 784 switch (packet_type){ 785 case AVCTP_START_PACKET: 786 if (size < 2) return; 787 788 // store header 789 pos = 0; 790 connection->avctp_reassembly_buffer[pos] = packet[pos]; 791 pos++; 792 connection->avctp_reassembly_size = pos; 793 794 // NOTE: num packets not needed for reassembly, ignoring it does not pose security risk -> no need to store it 795 pos++; 796 797 // PID in reassembled packet is at offset 1, it will be read later after the avctp_reassemble_message with AVCTP_END_PACKET is called 798 799 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 800 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 801 connection->avctp_reassembly_size += bytes_to_store; 802 break; 803 804 case AVCTP_CONTINUE_PACKET: 805 case AVCTP_END_PACKET: 806 if (size < 1) return; 807 808 // store remaining data, ignore header 809 pos = 1; 810 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 811 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 812 connection->avctp_reassembly_size += bytes_to_store; 813 break; 814 815 default: 816 return; 817 } 818 } 819 #endif 820 821 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 822 if (size < 6u) return; 823 uint8_t pdu_id; 824 avrcp_packet_type_t vendor_dependent_packet_type; 825 826 uint16_t pos = 0; 827 connection->last_confirmed_transaction_id = packet[pos] >> 4; 828 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((packet[pos] >> 1) & 0x01); 829 avctp_packet_type_t packet_type = (avctp_packet_type_t)((packet[pos] >> 2) & 0x03); 830 pos++; 831 832 if (frame_type != AVRCP_RESPONSE_FRAME) return; 833 834 switch (packet_type){ 835 case AVCTP_SINGLE_PACKET: 836 break; 837 838 #ifdef ENABLE_AVCTP_FRAGMENTATION 839 case AVCTP_START_PACKET: 840 case AVCTP_CONTINUE_PACKET: 841 avctp_reassemble_message(connection, packet_type, packet, size); 842 return; 843 844 case AVCTP_END_PACKET: 845 avctp_reassemble_message(connection, packet_type, packet, size); 846 847 packet = connection->avctp_reassembly_buffer; 848 size = connection->avctp_reassembly_size; 849 break; 850 #endif 851 852 default: 853 return; 854 } 855 856 pos += 2; // PID 857 858 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 859 860 #ifdef ENABLE_LOG_INFO 861 uint8_t byte_value = packet[pos]; 862 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 863 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 864 #endif 865 pos++; 866 867 uint8_t opcode = packet[pos++]; 868 uint16_t param_length; 869 870 switch (opcode){ 871 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 872 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 873 connection->state = AVCTP_CONNECTION_OPENED; 874 875 #ifdef ENABLE_LOG_INFO 876 // page, extension code (1) 877 pos++; 878 uint8_t unit_type = packet[pos] >> 3; 879 uint8_t max_subunit_ID = packet[pos] & 0x07; 880 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); 881 #endif 882 break; 883 } 884 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 885 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 886 connection->state = AVCTP_CONNECTION_OPENED; 887 888 #ifdef ENABLE_LOG_INFO 889 // byte value 7 (1) 890 pos++; 891 uint8_t unit_type = packet[pos] >> 3; 892 uint8_t unit = packet[pos] & 0x07; 893 pos++; 894 uint32_t company_id = big_endian_read_24(packet, pos); 895 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, 896 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 897 #endif 898 break; 899 } 900 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 901 902 if ((size - pos) < 7) return; 903 904 // Company ID (3) 905 pos += 3; 906 pdu_id = packet[pos++]; 907 vendor_dependent_packet_type = (avrcp_packet_type_t)(packet[pos++] & 0x03); 908 param_length = big_endian_read_16(packet, pos); 909 pos += 2; 910 911 if ((size - pos) < param_length) return; 912 913 // handle asynchronous notifications, without changing state 914 if (pdu_id == AVRCP_PDU_ID_REGISTER_NOTIFICATION){ 915 avrcp_controller_handle_notification(connection, ctype, packet + pos, size - pos); 916 break; 917 } 918 919 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE){ 920 log_info("AVRCP_CMD_OPCODE_VENDOR_DEPENDENT state %d", connection->state); 921 return; 922 } 923 connection->state = AVCTP_CONNECTION_OPENED; 924 925 log_info("VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 926 switch (pdu_id){ 927 case AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE:{ 928 uint8_t num_attributes = packet[pos++]; 929 int i; 930 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 931 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 932 for (i = 0; i < num_attributes; i++){ 933 uint8_t attribute_id = packet[pos++]; 934 uint8_t value = packet[pos++]; 935 switch (attribute_id){ 936 case 0x02: 937 repeat_mode = (avrcp_repeat_mode_t) value; 938 break; 939 case 0x03: 940 shuffle_mode = (avrcp_shuffle_mode_t) value; 941 break; 942 default: 943 break; 944 } 945 } 946 avrcp_controller_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 947 break; 948 } 949 950 case AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE:{ 951 uint16_t offset = 0; 952 uint8_t event[6]; 953 event[offset++] = HCI_EVENT_AVRCP_META; 954 event[offset++] = sizeof(event) - 2; 955 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 956 little_endian_store_16(event, offset, connection->avrcp_cid); 957 offset += 2; 958 event[offset++] = ctype; 959 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 960 break; 961 } 962 963 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 964 uint16_t offset = 0; 965 uint8_t event[7]; 966 event[offset++] = HCI_EVENT_AVRCP_META; 967 event[offset++] = sizeof(event) - 2; 968 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 969 little_endian_store_16(event, offset, connection->avrcp_cid); 970 offset += 2; 971 event[offset++] = ctype; 972 event[offset++] = packet[pos++]; 973 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 974 break; 975 } 976 977 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 978 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 979 uint8_t capability_count = 0; 980 if (param_length > 1){ 981 capability_count = packet[pos++]; 982 } 983 uint16_t i; 984 uint16_t offset = 0; 985 uint8_t event[10]; 986 987 switch (capability_id){ 988 989 case AVRCP_CAPABILITY_ID_COMPANY: 990 for (i = 0; (i < capability_count) && ((size - pos) >= 3); i++){ 991 uint32_t company_id = big_endian_read_24(packet, pos); 992 pos += 3; 993 log_info(" 0x%06" PRIx32 ", ", company_id); 994 995 offset = 0; 996 event[offset++] = HCI_EVENT_AVRCP_META; 997 event[offset++] = sizeof(event) - 2; 998 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID; 999 little_endian_store_16(event, offset, connection->avrcp_cid); 1000 offset += 2; 1001 event[offset++] = ctype; 1002 event[offset++] = 0; 1003 little_endian_store_24(event, offset, company_id); 1004 offset += 3; 1005 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1006 } 1007 1008 offset = 0; 1009 event[offset++] = HCI_EVENT_AVRCP_META; 1010 event[offset++] = sizeof(event) - 2; 1011 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID_DONE; 1012 little_endian_store_16(event, offset, connection->avrcp_cid); 1013 offset += 2; 1014 event[offset++] = ctype; 1015 event[offset++] = 0; 1016 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1017 break; 1018 1019 case AVRCP_CAPABILITY_ID_EVENT: 1020 for (i = 0; (i < capability_count) && ((size - pos) >= 1); i++){ 1021 uint8_t event_id = packet[pos++]; 1022 connection->remote_supported_notifications |= (1 << event_id); 1023 } 1024 1025 // if the get supported events query is triggered by avrcp_controller_enable_notification call, 1026 // avrcp_controller_emit_supported_events should be suppressed 1027 if (connection->remote_supported_notifications_suppress_emit_result){ 1028 connection->remote_supported_notifications_suppress_emit_result = false; 1029 // also, notification might not be supported 1030 // if so, emit AVRCP_SUBEVENT_ENABLE_NOTIFICATION_COMPLETE event to app, 1031 // and update notifications_to_register bitmap 1032 for (i = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; i < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; i++){ 1033 if ((connection->notifications_to_register & (1<<i)) != 0){ 1034 if ((connection->remote_supported_notifications & (1<<i)) == 0){ 1035 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, i); 1036 connection->notifications_to_register &= ~(1 << i); 1037 } 1038 } 1039 } 1040 break; 1041 } 1042 // supported events are emitted only if the get supported events query 1043 // is triggered by avrcp_controller_get_supported_events call 1044 avrcp_controller_emit_supported_events(connection); 1045 break; 1046 1047 default: 1048 // ignore 1049 break; 1050 } 1051 break; 1052 } 1053 1054 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 1055 uint32_t song_length = big_endian_read_32(packet, pos); 1056 pos += 4; 1057 uint32_t song_position = big_endian_read_32(packet, pos); 1058 pos += 4; 1059 uint8_t play_status = packet[pos]; 1060 1061 uint8_t event[15]; 1062 int offset = 0; 1063 event[offset++] = HCI_EVENT_AVRCP_META; 1064 event[offset++] = sizeof(event) - 2; 1065 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 1066 little_endian_store_16(event, offset, connection->avrcp_cid); 1067 offset += 2; 1068 event[offset++] = ctype; 1069 little_endian_store_32(event, offset, song_length); 1070 offset += 4; 1071 little_endian_store_32(event, offset, song_position); 1072 offset += 4; 1073 event[offset++] = play_status; 1074 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1075 break; 1076 } 1077 1078 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 1079 switch (vendor_dependent_packet_type){ 1080 case AVRCP_START_PACKET: 1081 case AVRCP_SINGLE_PACKET: 1082 avrcp_parser_reset(connection); 1083 connection->list_size = param_length; 1084 connection->num_attributes = packet[pos++]; 1085 1086 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1087 if (vendor_dependent_packet_type == AVRCP_START_PACKET){ 1088 avrcp_controller_request_continue_response(connection); 1089 } 1090 break; 1091 case AVRCP_CONTINUE_PACKET: 1092 case AVRCP_END_PACKET: 1093 connection->num_received_fragments++; 1094 1095 if (connection->num_received_fragments < connection->max_num_fragments){ 1096 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1097 1098 if (vendor_dependent_packet_type == AVRCP_CONTINUE_PACKET){ 1099 avrcp_controller_request_continue_response(connection); 1100 } 1101 } else { 1102 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 1103 avrcp_parser_reset(connection); 1104 avrcp_controller_request_abort_continuation(connection); 1105 } 1106 break; 1107 default: 1108 // TODO check 1109 btstack_assert(false); 1110 break; 1111 } 1112 } 1113 default: 1114 break; 1115 } 1116 break; 1117 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 1118 if ((size - pos) < 1) return; 1119 uint8_t operation_id = packet[pos++]; 1120 switch (connection->state){ 1121 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1122 // trigger release for simple command: 1123 if (!connection->press_and_hold_cmd_active){ 1124 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1125 break; 1126 } 1127 // for press and hold, send release if it just has been requested, otherwise, wait for next repeat 1128 if (connection->press_and_hold_cmd_release){ 1129 connection->press_and_hold_cmd_release = false; 1130 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1131 } else { 1132 connection->state = AVCTP_W4_STOP; 1133 } 1134 break; 1135 case AVCTP_W2_RECEIVE_RESPONSE: 1136 connection->state = AVCTP_CONNECTION_OPENED; 1137 break; 1138 default: 1139 break; 1140 } 1141 if (connection->state == AVCTP_W4_STOP){ 1142 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 1143 } 1144 if (connection->state == AVCTP_CONNECTION_OPENED) { 1145 // RELEASE response 1146 operation_id = operation_id & 0x7F; 1147 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 1148 } 1149 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 1150 // PRESS response 1151 avrcp_controller_request_pass_through_release_control_cmd(connection); 1152 } 1153 break; 1154 } 1155 default: 1156 break; 1157 } 1158 1159 // trigger pending notification reqistrations 1160 if ((connection->state == AVCTP_CONNECTION_OPENED) && connection->notifications_to_register){ 1161 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1162 } 1163 } 1164 1165 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 1166 switch (connection->state){ 1167 case AVCTP_W2_SEND_PRESS_COMMAND: 1168 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 1169 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 1170 return; 1171 case AVCTP_W2_SEND_COMMAND: 1172 case AVCTP_W2_SEND_RELEASE_COMMAND: 1173 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1174 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 1175 return; 1176 case AVCTP_W2_SEND_FRAGMENTED_COMMAND: 1177 if (connection->cmd_operands_fragmented_pos == 0){ 1178 avrcp_send_cmd(connection, AVRCP_START_PACKET); 1179 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1180 } else { 1181 if ((connection->cmd_operands_fragmented_len - connection->cmd_operands_fragmented_pos) > avrcp_get_max_payload_size_for_packet_type(AVRCP_CONTINUE_PACKET)){ 1182 avrcp_send_cmd(connection, AVRCP_CONTINUE_PACKET); 1183 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1184 } else { 1185 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1186 avrcp_send_cmd(connection, AVRCP_END_PACKET); 1187 } 1188 } 1189 return; 1190 default: 1191 break; 1192 } 1193 // send register notification if queued 1194 if (connection->notifications_to_register != 0){ 1195 uint8_t event_id; 1196 for (event_id = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t)AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 1197 if (connection->notifications_to_register & (1<<event_id)){ 1198 connection->notifications_to_register &= ~ (1 << event_id); 1199 avrcp_send_register_notification(connection, event_id); 1200 return; 1201 } 1202 } 1203 } 1204 } 1205 1206 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1207 avrcp_connection_t * connection; 1208 1209 switch (packet_type) { 1210 case L2CAP_DATA_PACKET: 1211 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1212 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1213 break; 1214 1215 case HCI_EVENT_PACKET: 1216 switch (hci_event_packet_get_type(packet)){ 1217 case L2CAP_EVENT_CAN_SEND_NOW: 1218 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1219 avrcp_controller_handle_can_send_now(connection); 1220 break; 1221 default: 1222 break; 1223 } 1224 default: 1225 break; 1226 } 1227 } 1228 1229 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){ 1230 avrcp_create_sdp_record(1, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 1231 } 1232 1233 void avrcp_controller_init(void){ 1234 avrcp_controller_context.role = AVRCP_CONTROLLER; 1235 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 1236 avrcp_register_controller_packet_handler(&avrcp_controller_packet_handler); 1237 } 1238 1239 void avrcp_controller_deinit(void){ 1240 memset(&avrcp_controller_context, 0, sizeof(avrcp_context_t)); 1241 } 1242 1243 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 1244 btstack_assert(callback != NULL); 1245 avrcp_controller_context.avrcp_callback = callback; 1246 } 1247 1248 1249 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 1250 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1251 } 1252 1253 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 1254 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1255 } 1256 1257 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 1258 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1259 } 1260 1261 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 1262 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1263 } 1264 1265 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 1266 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1267 } 1268 1269 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 1270 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1271 } 1272 1273 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1274 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1275 } 1276 1277 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1278 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1279 } 1280 1281 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1282 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1283 } 1284 1285 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1286 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1287 } 1288 1289 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1290 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1291 } 1292 1293 /* start continuous cmds */ 1294 1295 uint8_t avrcp_controller_start_press_and_hold_cmd(uint16_t avrcp_cid, avrcp_operation_id_t operation_id){ 1296 return request_continuous_pass_through_press_control_cmd(avrcp_cid, operation_id, 0); 1297 } 1298 1299 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1300 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1301 } 1302 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1303 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1304 } 1305 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1306 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1307 } 1308 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1309 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1310 } 1311 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1312 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1313 } 1314 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1315 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1316 } 1317 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1318 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1319 } 1320 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1321 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1322 } 1323 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1324 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1325 } 1326 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1327 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1328 } 1329 1330 /* stop continuous cmds */ 1331 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1332 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1333 if (!connection){ 1334 log_error("avrcp_stop_play: could not find a connection."); 1335 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1336 } 1337 1338 switch (connection->state){ 1339 // respond when we receive response for (repeated) press command 1340 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1341 connection->press_and_hold_cmd_release = true; 1342 break; 1343 1344 // release already sent or on the way, nothing to do 1345 case AVCTP_W2_RECEIVE_RESPONSE: 1346 case AVCTP_W2_SEND_RELEASE_COMMAND: 1347 break; 1348 1349 // about to send next repeated press command or wait for it -> release right away 1350 case AVCTP_W2_SEND_PRESS_COMMAND: 1351 case AVCTP_W4_STOP: 1352 return avrcp_controller_request_pass_through_release_control_cmd(connection); 1353 1354 // otherwise reject request 1355 default: 1356 return ERROR_CODE_COMMAND_DISALLOWED; 1357 } 1358 return ERROR_CODE_SUCCESS; 1359 } 1360 1361 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1362 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1363 if (!connection){ 1364 log_error("avrcp_get_play_status: could not find a connection."); 1365 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1366 } 1367 return avrcp_controller_register_notification(connection, event_id); 1368 } 1369 1370 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1371 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1372 if (!connection){ 1373 log_error("avrcp_get_play_status: could not find a connection."); 1374 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1375 } 1376 connection->notifications_to_deregister |= (1 << event_id); 1377 return ERROR_CODE_SUCCESS; 1378 } 1379 1380 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 1381 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1382 if (!connection){ 1383 log_error("avrcp_unit_info: could not find a connection."); 1384 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1385 } 1386 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1387 connection->state = AVCTP_W2_SEND_COMMAND; 1388 1389 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1390 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 1391 connection->command_type = AVRCP_CTYPE_STATUS; 1392 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 1393 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 1394 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 1395 connection->cmd_operands_length = 5; 1396 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1397 return ERROR_CODE_SUCCESS; 1398 } 1399 1400 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 1401 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1402 if (!connection){ 1403 log_error("avrcp_unit_info: could not find a connection."); 1404 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1405 } 1406 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1407 connection->state = AVCTP_W2_SEND_COMMAND; 1408 1409 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1410 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 1411 connection->command_type = AVRCP_CTYPE_STATUS; 1412 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 1413 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 1414 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 1415 connection->cmd_operands[0] = 7; // page: 0, extention_code: 7 1416 connection->cmd_operands_length = 5; 1417 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1418 return ERROR_CODE_SUCCESS; 1419 } 1420 1421 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 1422 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1423 if (!connection){ 1424 log_error("avrcp_get_capabilities: could not find a connection."); 1425 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1426 } 1427 if (connection->state != AVCTP_CONNECTION_OPENED){ 1428 return ERROR_CODE_COMMAND_DISALLOWED; 1429 } 1430 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_COMPANY); 1431 return ERROR_CODE_SUCCESS; 1432 } 1433 1434 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 1435 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1436 if (!connection){ 1437 log_error("avrcp_get_capabilities: could not find a connection."); 1438 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1439 } 1440 if (connection->state != AVCTP_CONNECTION_OPENED){ 1441 return ERROR_CODE_COMMAND_DISALLOWED; 1442 } 1443 1444 if (!connection->remote_supported_notifications_queried){ 1445 connection->remote_supported_notifications_queried = true; 1446 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 1447 return ERROR_CODE_SUCCESS; 1448 } 1449 1450 avrcp_controller_emit_supported_events(connection); 1451 return ERROR_CODE_SUCCESS; 1452 } 1453 1454 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1455 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1456 if (!connection){ 1457 log_error("avrcp_get_play_status: could not find a connection."); 1458 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1459 } 1460 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1461 connection->state = AVCTP_W2_SEND_COMMAND; 1462 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1463 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1464 connection->command_type = AVRCP_CTYPE_STATUS; 1465 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1466 connection->subunit_id = AVRCP_SUBUNIT_ID; 1467 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1468 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_PLAY_STATUS; 1469 connection->cmd_operands[4] = 0; // reserved(upper 6) | packet_type -> 0 1470 big_endian_store_16(connection->cmd_operands, 5, 0); // parameter length 1471 connection->cmd_operands_length = 7; 1472 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1473 return ERROR_CODE_SUCCESS; 1474 } 1475 1476 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1477 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1478 if (!connection){ 1479 log_error("avrcp_get_capabilities: could not find a connection."); 1480 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1481 } 1482 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1483 connection->state = AVCTP_W2_SEND_COMMAND; 1484 1485 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1486 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1487 connection->command_type = AVRCP_CTYPE_CONTROL; 1488 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1489 connection->subunit_id = AVRCP_SUBUNIT_ID; 1490 int pos = 0; 1491 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1492 pos += 3; 1493 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ADDRESSED_PLAYER; // PDU ID 1494 connection->cmd_operands[pos++] = 0; 1495 1496 // Parameter Length 1497 big_endian_store_16(connection->cmd_operands, pos, 2); 1498 pos += 2; 1499 1500 big_endian_store_16(connection->cmd_operands, pos, addressed_player_id); 1501 pos += 2; 1502 1503 connection->cmd_operands_length = pos; 1504 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1505 return ERROR_CODE_SUCCESS; 1506 } 1507 1508 uint8_t avrcp_controller_get_element_attributes(uint16_t avrcp_cid, uint8_t num_attributes, avrcp_media_attribute_id_t * attributes){ 1509 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1510 if (!connection){ 1511 log_error("avrcp_get_capabilities: could not find a connection."); 1512 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1513 } 1514 1515 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1516 1517 if (num_attributes >= AVRCP_MEDIA_ATTR_RESERVED) { 1518 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 1519 } 1520 connection->state = AVCTP_W2_SEND_COMMAND; 1521 1522 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1523 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1524 connection->command_type = AVRCP_CTYPE_STATUS; 1525 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1526 connection->subunit_id = AVRCP_SUBUNIT_ID; 1527 int pos = 0; 1528 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1529 pos += 3; 1530 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; // PDU ID 1531 connection->cmd_operands[pos++] = 0; 1532 1533 // Parameter Length 1534 big_endian_store_16(connection->cmd_operands, pos, 9); 1535 pos += 2; 1536 1537 // write 8 bytes value 1538 memset(connection->cmd_operands + pos, 0, 8); // identifier: PLAYING 1539 pos += 8; 1540 1541 connection->cmd_operands[pos++] = num_attributes; // attribute count, if 0 get all attributes 1542 1543 int i; 1544 for (i = 0; i < num_attributes; i++){ 1545 // every attribute is 4 bytes long 1546 big_endian_store_32(connection->cmd_operands, pos, attributes[i]); 1547 pos += 4; 1548 } 1549 1550 connection->cmd_operands_length = pos; 1551 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1552 return ERROR_CODE_SUCCESS; 1553 } 1554 1555 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1556 return avrcp_controller_get_element_attributes(avrcp_cid, 0, NULL); 1557 } 1558 1559 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1560 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1561 if (!connection){ 1562 log_error("avrcp_get_capabilities: could not find a connection."); 1563 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1564 } 1565 1566 // 1567 // allow sending of multiple set abs volume commands without waiting for response 1568 // 1569 uint8_t status = ERROR_CODE_COMMAND_DISALLOWED; 1570 switch (connection->state){ 1571 case AVCTP_CONNECTION_OPENED: 1572 status = ERROR_CODE_SUCCESS; 1573 break; 1574 case AVCTP_W2_RECEIVE_RESPONSE: 1575 // - is pending response also set abs volume 1576 if (connection->command_opcode != AVRCP_CMD_OPCODE_VENDOR_DEPENDENT) break; 1577 if (connection->command_type != AVRCP_CTYPE_CONTROL) break; 1578 if (connection->subunit_type != AVRCP_SUBUNIT_TYPE_PANEL) break; 1579 if (connection->subunit_id != AVRCP_SUBUNIT_ID) break; 1580 if (connection->cmd_operands[3] != AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME) break; 1581 // - is next transaction id valid in window 1582 if (avrcp_controller_is_transaction_id_valid(connection, avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter)) == false) break; 1583 status = ERROR_CODE_SUCCESS; 1584 break; 1585 default: 1586 break; 1587 } 1588 if (status != ERROR_CODE_SUCCESS) return status; 1589 1590 connection->state = AVCTP_W2_SEND_COMMAND; 1591 1592 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1593 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1594 connection->command_type = AVRCP_CTYPE_CONTROL; 1595 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1596 connection->subunit_id = AVRCP_SUBUNIT_ID; 1597 int pos = 0; 1598 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1599 pos += 3; 1600 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME; // PDU ID 1601 connection->cmd_operands[pos++] = 0; 1602 1603 // Parameter Length 1604 big_endian_store_16(connection->cmd_operands, pos, 1); 1605 pos += 2; 1606 connection->cmd_operands[pos++] = volume; 1607 1608 connection->cmd_operands_length = pos; 1609 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1610 return ERROR_CODE_SUCCESS; 1611 } 1612 1613 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 1614 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1615 if (!connection){ 1616 log_error("avrcp_get_capabilities: could not find a connection."); 1617 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1618 } 1619 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1620 connection->state = AVCTP_W2_SEND_COMMAND; 1621 1622 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1623 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1624 connection->command_type = AVRCP_CTYPE_STATUS; 1625 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1626 connection->subunit_id = AVRCP_SUBUNIT_ID; 1627 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1628 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE; // PDU ID 1629 connection->cmd_operands[4] = 0; 1630 big_endian_store_16(connection->cmd_operands, 5, 5); // parameter length 1631 connection->cmd_operands[7] = 4; // NumPlayerApplicationSettingAttributeID 1632 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1633 connection->cmd_operands[8] = 0x01; // equalizer (1-OFF, 2-ON) 1634 connection->cmd_operands[9] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1635 connection->cmd_operands[10] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1636 connection->cmd_operands[11] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1637 connection->cmd_operands_length = 12; 1638 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1639 return ERROR_CODE_SUCCESS; 1640 } 1641 1642 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1643 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1644 if (!connection){ 1645 log_error("avrcp_get_capabilities: could not find a connection."); 1646 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1647 } 1648 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1649 connection->state = AVCTP_W2_SEND_COMMAND; 1650 1651 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1652 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1653 connection->command_type = AVRCP_CTYPE_CONTROL; 1654 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1655 connection->subunit_id = AVRCP_SUBUNIT_ID; 1656 int pos = 0; 1657 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1658 pos += 3; 1659 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE; // PDU ID 1660 connection->cmd_operands[pos++] = 0; 1661 // Parameter Length 1662 big_endian_store_16(connection->cmd_operands, pos, 3); 1663 pos += 2; 1664 connection->cmd_operands[pos++] = 2; 1665 connection->cmd_operands_length = pos; 1666 connection->cmd_operands[pos++] = attr_id; 1667 connection->cmd_operands[pos++] = attr_value; 1668 connection->cmd_operands_length = pos; 1669 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1670 return ERROR_CODE_SUCCESS; 1671 } 1672 1673 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1674 if ((mode < AVRCP_SHUFFLE_MODE_OFF) || (mode > AVRCP_SHUFFLE_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1675 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1676 } 1677 1678 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1679 if ((mode < AVRCP_REPEAT_MODE_OFF) || (mode > AVRCP_REPEAT_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1680 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1681 } 1682 1683 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1684 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1685 if (!connection){ 1686 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1687 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1688 } 1689 if (connection->state != AVCTP_CONNECTION_OPENED){ 1690 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1691 return ERROR_CODE_COMMAND_DISALLOWED; 1692 } 1693 connection->state = AVCTP_W2_SEND_COMMAND; 1694 1695 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1696 connection->command_type = AVRCP_CTYPE_CONTROL; 1697 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1698 connection->subunit_id = AVRCP_SUBUNIT_ID; 1699 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1700 int pos = 0; 1701 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1702 pos += 3; 1703 connection->cmd_operands[pos++] = AVRCP_PDU_ID_PLAY_ITEM; // PDU ID 1704 // reserved 1705 connection->cmd_operands[pos++] = 0; 1706 // Parameter Length 1707 big_endian_store_16(connection->cmd_operands, pos, 11); 1708 pos += 2; 1709 connection->cmd_operands[pos++] = scope; 1710 memset(&connection->cmd_operands[pos], 0, 8); 1711 if (uid){ 1712 (void)memcpy(&connection->cmd_operands[pos], uid, 8); 1713 } 1714 pos += 8; 1715 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1716 pos += 2; 1717 connection->cmd_operands_length = pos; 1718 1719 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1720 return ERROR_CODE_SUCCESS; 1721 } 1722 1723 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){ 1724 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1725 if (!connection){ 1726 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1727 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1728 } 1729 if (connection->state != AVCTP_CONNECTION_OPENED){ 1730 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1731 return ERROR_CODE_COMMAND_DISALLOWED; 1732 } 1733 connection->state = AVCTP_W2_SEND_COMMAND; 1734 1735 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1736 connection->command_type = AVRCP_CTYPE_CONTROL; 1737 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1738 connection->subunit_id = AVRCP_SUBUNIT_ID; 1739 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1740 int pos = 0; 1741 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1742 pos += 3; 1743 connection->cmd_operands[pos++] = AVRCP_PDU_ID_ADD_TO_NOW_PLAYING; // PDU ID 1744 // reserved 1745 connection->cmd_operands[pos++] = 0; 1746 // Parameter Length 1747 big_endian_store_16(connection->cmd_operands, pos, 11); 1748 pos += 2; 1749 connection->cmd_operands[pos++] = scope; 1750 memset(&connection->cmd_operands[pos], 0, 8); 1751 if (uid){ 1752 (void)memcpy(&connection->cmd_operands[pos], uid, 8); 1753 } 1754 pos += 8; 1755 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1756 pos += 2; 1757 connection->cmd_operands_length = pos; 1758 1759 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1760 return ERROR_CODE_SUCCESS; 1761 } 1762 1763 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1764 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1765 if (!connection){ 1766 log_error("avrcp_controller_play_item: could not find a connection."); 1767 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1768 } 1769 connection->max_num_fragments = max_num_fragments; 1770 return ERROR_CODE_SUCCESS; 1771 } 1772 1773 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){ 1774 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1775 if (!connection){ 1776 log_error("avrcp_controller_play_item: could not find a connection."); 1777 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1778 } 1779 1780 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1781 connection->state = AVCTP_W2_SEND_FRAGMENTED_COMMAND; 1782 1783 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 1784 connection->command_opcode = command_opcode; 1785 connection->command_type = command_type; 1786 connection->subunit_type = subunit_type; 1787 connection->subunit_id = subunit_id; 1788 connection->cmd_operands_fragmented_buffer = command_buffer; 1789 connection->cmd_operands_fragmented_pos = 0; 1790 connection->cmd_operands_fragmented_len = command_len; 1791 1792 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1793 return ERROR_CODE_SUCCESS; 1794 } 1795