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