1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp_controller.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <inttypes.h> 43 44 #include "classic/avrcp.h" 45 #include "classic/avrcp_controller.h" 46 47 #include "bluetooth_sdp.h" 48 #include "btstack_debug.h" 49 #include "btstack_event.h" 50 51 static const char * avrcp_default_controller_service_name = "AVRCP Controller"; 52 static const char * avrcp_default_controller_service_provider_name = "BlueKitchen"; 53 54 // made public in avrcp_controller.h 55 avrcp_context_t avrcp_controller_context; 56 57 static uint8_t avrcp_controller_calc_next_transaction_label(uint8_t current_transaction_label){ 58 current_transaction_label++; 59 if (current_transaction_label == 16){ 60 current_transaction_label = 1; 61 } 62 return current_transaction_label; 63 } 64 65 static uint8_t avrcp_controller_get_next_transaction_label(avrcp_connection_t * connection){ 66 connection->transaction_id_counter = avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter); 67 return connection->transaction_id_counter; 68 } 69 70 static bool avrcp_controller_is_transaction_id_valid(avrcp_connection_t * connection, uint8_t transaction_id){ 71 uint8_t delta = ((int8_t) transaction_id - connection->controller_last_confirmed_transaction_id) & 0x0f; 72 return delta < 15; 73 } 74 75 static void avrcp_controller_custom_command_data_init(avrcp_connection_t * connection, 76 avrcp_command_opcode_t opcode, avrcp_command_type_t command_type, 77 avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 78 avrcp_pdu_id_t pdu_id, uint32_t company_id){ 79 80 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 81 connection->command_opcode = opcode; 82 connection->command_type = command_type; 83 connection->subunit_type = subunit_type; 84 connection->subunit_id = subunit_id; 85 connection->company_id = company_id; 86 connection->pdu_id = pdu_id; 87 connection->data = NULL; 88 connection->data_offset = 0; 89 connection->data_len = 0; 90 } 91 92 static void avrcp_controller_vendor_dependent_command_data_init(avrcp_connection_t * connection, avrcp_command_type_t command_type, avrcp_pdu_id_t pdu_id, bool get_next_transaction_label){ 93 if (get_next_transaction_label){ 94 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 95 } 96 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 97 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 98 connection->subunit_id = AVRCP_SUBUNIT_ID; 99 connection->company_id = BT_SIG_COMPANY_ID; 100 101 connection->command_type = command_type; 102 connection->pdu_id = pdu_id; 103 connection->data = connection->message_body; 104 connection->data_offset = 0; 105 connection->data_len = 0; 106 } 107 108 static void avrcp_controller_pass_through_command_data_init(avrcp_connection_t * connection, avrcp_operation_id_t opid){ 109 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 110 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 111 connection->command_type = AVRCP_CTYPE_CONTROL; 112 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 113 connection->subunit_id = AVRCP_SUBUNIT_ID; 114 115 connection->company_id = 0; 116 connection->pdu_id = AVRCP_PDU_ID_UNDEFINED; 117 connection->operation_id = opid; 118 119 connection->data = connection->message_body; 120 connection->data_offset = 0; 121 connection->data_len = 0; 122 } 123 124 static int avrcp_controller_supports_browsing(uint16_t controller_supported_features){ 125 return controller_supported_features & AVRCP_FEATURE_MASK_BROWSING; 126 } 127 128 static void avrcp_controller_prepare_custom_command_response(avrcp_connection_t * connection, uint16_t response_len, uint8_t * in_place_buffer){ 129 uint8_t pos = 0; 130 in_place_buffer[pos++] = HCI_EVENT_AVRCP_META; 131 // skip len 132 pos++; 133 in_place_buffer[pos++] = AVRCP_SUBEVENT_CUSTOM_COMMAND_RESPONSE; 134 little_endian_store_16(in_place_buffer, pos, connection->avrcp_cid); 135 pos += 2; 136 in_place_buffer[pos++] = (uint8_t)connection->command_type; 137 in_place_buffer[pos++] = (uint8_t)connection->pdu_id; 138 little_endian_store_16(in_place_buffer, pos, response_len); 139 pos += 2; 140 in_place_buffer[1] = pos + response_len - 2; 141 } 142 143 static void avrcp_controller_emit_notification_complete(avrcp_connection_t * connection, uint8_t status, uint8_t event_id, bool enabled){ 144 uint8_t event[8]; 145 uint8_t pos = 0; 146 event[pos++] = HCI_EVENT_AVRCP_META; 147 event[pos++] = sizeof(event) - 2; 148 event[pos++] = AVRCP_SUBEVENT_NOTIFICATION_STATE; 149 little_endian_store_16(event, pos, connection->avrcp_cid); 150 pos += 2; 151 event[pos++] = status; 152 event[pos++] = enabled ? 1 : 0; 153 event[pos++] = event_id; 154 UNUSED(pos); 155 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static void avrcp_controller_emit_supported_events(avrcp_connection_t * connection){ 159 uint8_t ctype = (uint8_t) AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 160 uint8_t event_id; 161 162 for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 163 if ((connection->notifications_supported_by_target & (1 << event_id)) == 0){ 164 continue; 165 } 166 uint8_t event[8]; 167 uint8_t pos = 0; 168 event[pos++] = HCI_EVENT_AVRCP_META; 169 event[pos++] = sizeof(event) - 2; 170 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID; 171 little_endian_store_16(event, pos, connection->avrcp_cid); 172 pos += 2; 173 event[pos++] = ctype; 174 event[pos++] = 0; 175 event[pos++] = event_id; 176 UNUSED(pos); 177 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 178 } 179 180 uint8_t event[7]; 181 uint8_t pos = 0; 182 event[pos++] = HCI_EVENT_AVRCP_META; 183 event[pos++] = sizeof(event) - 2; 184 event[pos++] = AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE; 185 little_endian_store_16(event, pos, connection->avrcp_cid); 186 pos += 2; 187 event[pos++] = ctype; 188 event[pos++] = 0; 189 UNUSED(pos); 190 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 191 } 192 193 static void avrcp_controller_emit_notification_for_event_id(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id, 194 avrcp_command_type_t ctype, const uint8_t *payload, 195 uint16_t size) { 196 switch (event_id){ 197 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED:{ 198 if (size < 4) break; 199 uint32_t song_position = big_endian_read_32(payload, 0); 200 uint16_t offset = 0; 201 uint8_t event[10]; 202 event[offset++] = HCI_EVENT_AVRCP_META; 203 event[offset++] = sizeof(event) - 2; 204 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED; 205 little_endian_store_16(event, offset, avrcp_cid); 206 offset += 2; 207 event[offset++] = ctype; 208 little_endian_store_32(event, offset, song_position); 209 offset += 4; 210 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 211 break; 212 } 213 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED:{ 214 if (size < 1) break; 215 uint16_t offset = 0; 216 uint8_t event[7]; 217 event[offset++] = HCI_EVENT_AVRCP_META; 218 event[offset++] = sizeof(event) - 2; 219 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED; 220 little_endian_store_16(event, offset, avrcp_cid); 221 offset += 2; 222 event[offset++] = ctype; 223 event[offset++] = payload[0]; 224 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 225 break; 226 } 227 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED:{ 228 uint16_t offset = 0; 229 uint8_t event[6]; 230 event[offset++] = HCI_EVENT_AVRCP_META; 231 event[offset++] = sizeof(event) - 2; 232 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED; 233 little_endian_store_16(event, offset, avrcp_cid); 234 offset += 2; 235 event[offset++] = ctype; 236 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 237 break; 238 } 239 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED:{ 240 uint16_t offset = 0; 241 uint8_t event[6]; 242 event[offset++] = HCI_EVENT_AVRCP_META; 243 event[offset++] = sizeof(event) - 2; 244 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED; 245 little_endian_store_16(event, offset, avrcp_cid); 246 offset += 2; 247 event[offset++] = ctype; 248 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 249 break; 250 } 251 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED:{ 252 uint16_t offset = 0; 253 uint8_t event[6]; 254 event[offset++] = HCI_EVENT_AVRCP_META; 255 event[offset++] = sizeof(event) - 2; 256 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED; 257 little_endian_store_16(event, offset, avrcp_cid); 258 offset += 2; 259 event[offset++] = ctype; 260 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 261 break; 262 } 263 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED:{ 264 if (size < 1) break; 265 uint16_t offset = 0; 266 uint8_t event[7]; 267 event[offset++] = HCI_EVENT_AVRCP_META; 268 event[offset++] = sizeof(event) - 2; 269 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 270 little_endian_store_16(event, offset, avrcp_cid); 271 offset += 2; 272 event[offset++] = ctype; 273 event[offset++] = payload[0] & 0x7F; 274 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 275 break; 276 } 277 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED:{ 278 if (size < 2) break; 279 uint8_t event[8]; 280 uint16_t offset = 0; 281 uint16_t uuid = big_endian_read_16(payload, 0); 282 event[offset++] = HCI_EVENT_AVRCP_META; 283 event[offset++] = sizeof(event) - 2; 284 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_UIDS_CHANGED; 285 little_endian_store_16(event, offset, avrcp_cid); 286 offset += 2; 287 event[offset++] = ctype; 288 little_endian_store_16(event, offset, uuid); 289 offset += 2; 290 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 291 break; 292 } 293 294 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_END:{ 295 uint16_t offset = 0; 296 uint8_t event[6]; 297 event[offset++] = HCI_EVENT_AVRCP_META; 298 event[offset++] = sizeof(event) - 2; 299 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END; 300 little_endian_store_16(event, offset, avrcp_cid); 301 offset += 2; 302 event[offset++] = ctype; 303 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 304 break; 305 } 306 case AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_START:{ 307 uint16_t offset = 0; 308 uint8_t event[6]; 309 event[offset++] = HCI_EVENT_AVRCP_META; 310 event[offset++] = sizeof(event) - 2; 311 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_START; 312 little_endian_store_16(event, offset, avrcp_cid); 313 offset += 2; 314 event[offset++] = ctype; 315 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 316 break; 317 } 318 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED:{ 319 if (size < 1) break; 320 uint16_t offset = 0; 321 uint8_t event[7]; 322 event[offset++] = HCI_EVENT_AVRCP_META; 323 event[offset++] = sizeof(event) - 2; 324 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_BATT_STATUS_CHANGED; 325 little_endian_store_16(event, offset, avrcp_cid); 326 offset += 2; 327 event[offset++] = ctype; 328 event[offset++] = payload[0]; 329 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 330 break; 331 } 332 333 case AVRCP_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED:{ 334 if (size < 1) break; 335 uint16_t offset = 0; 336 uint8_t event[7]; 337 event[offset++] = HCI_EVENT_AVRCP_META; 338 event[offset++] = sizeof(event) - 2; 339 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED; 340 little_endian_store_16(event, offset, avrcp_cid); 341 offset += 2; 342 event[offset++] = ctype; 343 event[offset++] = payload[0]; 344 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 345 break; 346 } 347 348 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 349 default: 350 log_info("avrcp: not implemented"); 351 break; 352 } 353 } 354 355 static void avrcp_controller_emit_repeat_and_shuffle_mode(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_repeat_mode_t repeat_mode, avrcp_shuffle_mode_t shuffle_mode){ 356 btstack_assert(callback != NULL); 357 358 uint8_t event[8]; 359 int pos = 0; 360 event[pos++] = HCI_EVENT_AVRCP_META; 361 event[pos++] = sizeof(event) - 2; 362 event[pos++] = AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE; 363 little_endian_store_16(event, pos, avrcp_cid); 364 pos += 2; 365 event[pos++] = ctype; 366 event[pos++] = repeat_mode; 367 event[pos++] = shuffle_mode; 368 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 369 } 370 371 static void avrcp_controller_emit_now_playing_info_event_done(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, uint8_t status){ 372 uint8_t event[7]; 373 int pos = 0; 374 event[pos++] = HCI_EVENT_AVRCP_META; 375 event[pos++] = sizeof(event) - 2; 376 event[pos++] = AVRCP_SUBEVENT_NOW_PLAYING_INFO_DONE; 377 little_endian_store_16(event, pos, avrcp_cid); 378 pos += 2; 379 event[pos++] = ctype; 380 event[pos++] = status; 381 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 382 } 383 384 static void avrcp_controller_emit_now_playing_info_event(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_media_attribute_id_t attr_id, uint8_t * value, uint16_t value_len){ 385 uint8_t event[HCI_EVENT_BUFFER_SIZE]; 386 uint16_t pos = 0; 387 event[pos++] = HCI_EVENT_AVRCP_META; 388 // reserve one byte for subevent type and data len 389 uint16_t data_len_pos = pos; 390 pos++; 391 uint16_t subevent_type_pos = pos; 392 pos++; 393 little_endian_store_16(event, pos, avrcp_cid); 394 pos += 2; 395 event[pos++] = ctype; 396 397 switch (attr_id){ 398 case AVRCP_MEDIA_ATTR_TITLE: 399 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO; 400 btstack_assert(value_len <= 255); 401 event[pos++] = (uint8_t) value_len; 402 (void)memcpy(event + pos, value, value_len); 403 break; 404 case AVRCP_MEDIA_ATTR_ARTIST: 405 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO; 406 btstack_assert(value_len <= 255); 407 event[pos++] = (uint8_t) value_len; 408 (void)memcpy(event + pos, value, value_len); 409 break; 410 case AVRCP_MEDIA_ATTR_ALBUM: 411 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO; 412 btstack_assert(value_len <= 255); 413 event[pos++] = (uint8_t) value_len; 414 (void)memcpy(event + pos, value, value_len); 415 break; 416 case AVRCP_MEDIA_ATTR_GENRE: 417 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO; 418 btstack_assert(value_len <= 255); 419 event[pos++] = (uint8_t) value_len; 420 (void)memcpy(event + pos, value, value_len); 421 break; 422 #ifdef ENABLE_AVRCP_COVER_ART 423 case AVRCP_MEDIA_ATTR_DEFAULT_COVER_ART: 424 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_COVER_ART_INFO; 425 btstack_assert(value_len <= 255); 426 event[pos++] = (uint8_t) value_len; 427 (void)memcpy(event + pos, value, value_len); 428 break; 429 #endif 430 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 431 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_SONG_LENGTH_MS_INFO; 432 if (value){ 433 little_endian_store_32(event, pos, btstack_atoi((char *)value)); 434 } else { 435 little_endian_store_32(event, pos, 0); 436 } 437 pos += 4; 438 break; 439 case AVRCP_MEDIA_ATTR_TRACK: 440 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO; 441 if (value){ 442 event[pos++] = btstack_atoi((char *)value); 443 } else { 444 event[pos++] = 0; 445 } 446 break; 447 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 448 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO; 449 if (value){ 450 event[pos++] = btstack_atoi((char *)value); 451 } else { 452 event[pos++] = 0; 453 } 454 break; 455 default: 456 break; 457 } 458 event[data_len_pos] = pos - 2; 459 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 460 } 461 462 static void avrcp_controller_emit_operation_status(btstack_packet_handler_t callback, uint8_t subevent, uint16_t avrcp_cid, uint8_t ctype, uint8_t operation_id){ 463 btstack_assert(callback != NULL); 464 465 uint8_t event[7]; 466 int pos = 0; 467 event[pos++] = HCI_EVENT_AVRCP_META; 468 event[pos++] = sizeof(event) - 2; 469 event[pos++] = subevent; 470 little_endian_store_16(event, pos, avrcp_cid); 471 pos += 2; 472 event[pos++] = ctype; 473 event[pos++] = operation_id; 474 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 475 } 476 477 static void avrcp_parser_reset(avrcp_connection_t * connection){ 478 connection->list_offset = 0; 479 connection->parser_attribute_header_pos = 0; 480 connection->controller_num_received_fragments = 0; 481 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 482 } 483 484 static void avrcp_parser_process_byte(uint8_t byte, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 485 uint16_t attribute_total_value_len; 486 uint32_t attribute_id; 487 switch(connection->parser_state){ 488 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER: 489 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 490 connection->list_offset++; 491 492 if (connection->parser_attribute_header_pos < AVRCP_ATTRIBUTE_HEADER_LEN) return; 493 494 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 495 connection->attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTE_SIZE); 496 if (connection->attribute_value_len > 0){ 497 // get ready for attribute value 498 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 499 return; 500 } 501 502 // emit empty attribute 503 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 504 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 505 506 // done, see below 507 break; 508 509 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE: 510 connection->attribute_value[connection->attribute_value_offset++] = byte; 511 connection->list_offset++; 512 513 if (connection->attribute_value_offset < connection->attribute_value_len) return; 514 515 // emit (potentially partial) attribute 516 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 517 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 518 519 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 520 if (connection->attribute_value_offset < attribute_total_value_len){ 521 // ignore rest of attribute 522 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 523 return; 524 } 525 526 // done, see below 527 break; 528 529 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 530 connection->attribute_value_offset++; 531 connection->list_offset++; 532 533 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 534 if (connection->attribute_value_offset < attribute_total_value_len) return; 535 536 // done, see below 537 break; 538 539 default: 540 return; 541 } 542 543 // attribute fully read, check if more to come 544 if (connection->list_offset < connection->list_size){ 545 // more to come, reset parser 546 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 547 connection->parser_attribute_header_pos = 0; 548 connection->attribute_value_offset = 0; 549 } else { 550 // fully done 551 avrcp_parser_reset(connection); 552 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 553 } 554 } 555 556 static void avrcp_controller_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 557 int i; 558 for (i=0;i<num_bytes_to_read;i++){ 559 avrcp_parser_process_byte(packet[i], connection, ctype); 560 } 561 } 562 563 static void avrcp_send_cmd_with_avctp_fragmentation(avrcp_connection_t * connection){ 564 l2cap_reserve_packet_buffer(); 565 uint8_t * packet = l2cap_get_outgoing_buffer(); 566 567 uint16_t max_payload_size; 568 connection->avctp_packet_type = avctp_get_packet_type(connection, &max_payload_size); 569 connection->avrcp_packet_type = avrcp_get_packet_type(connection); 570 571 // non-fragmented: transport header (1) + PID (2) 572 // fragmented: transport header (1) + num packets (1) + PID (2) 573 574 uint16_t param_len = connection->data_len; 575 // AVCTP header 576 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 577 uint16_t pos = 0; 578 packet[pos++] = (connection->transaction_id << 4) | (connection->avctp_packet_type << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 579 580 if (connection->avctp_packet_type == AVCTP_START_PACKET){ 581 uint16_t max_frame_size = btstack_min(connection->l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 582 // first packet: max_payload_size 583 // rest packets 584 uint16_t num_payload_bytes = param_len - max_payload_size; 585 uint16_t frame_size_for_continue_packet = max_frame_size - avctp_get_num_bytes_for_header(AVCTP_CONTINUE_PACKET); 586 uint16_t num_avctp_packets = (num_payload_bytes + frame_size_for_continue_packet - 1)/frame_size_for_continue_packet + 1; 587 btstack_assert(num_avctp_packets <= 255); 588 packet[pos++] = (uint8_t) num_avctp_packets; 589 } 590 591 switch (connection->avctp_packet_type){ 592 case AVCTP_SINGLE_PACKET: 593 case AVCTP_START_PACKET: 594 connection->data_offset = 0; 595 // Profile IDentifier (PID) 596 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 597 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 598 599 // command_type 600 packet[pos++] = connection->command_type; 601 // subunit_type | subunit ID 602 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 603 // opcode 604 packet[pos++] = (uint8_t)connection->command_opcode; 605 606 switch (connection->command_opcode){ 607 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 608 big_endian_store_24(packet, pos, connection->company_id); 609 pos += 3; 610 packet[pos++] = connection->pdu_id; 611 packet[pos++] = connection->avrcp_packet_type; // reserved(upper 6) | AVRCP packet_type 612 big_endian_store_16(packet, pos, connection->data_len); // parameter length 613 pos += 2; 614 break; 615 case AVRCP_CMD_OPCODE_PASS_THROUGH: 616 packet[pos++] = connection->operation_id; 617 packet[pos++] = (uint8_t)connection->data_len; // parameter length 618 pos += 2; 619 break; 620 case AVRCP_CMD_OPCODE_UNIT_INFO: 621 break; 622 case AVRCP_CMD_OPCODE_SUBUNIT_INFO: 623 break; 624 default: 625 btstack_assert(false); 626 return; 627 } 628 break; 629 case AVCTP_CONTINUE_PACKET: 630 case AVCTP_END_PACKET: 631 break; 632 default: 633 btstack_assert(false); 634 return; 635 } 636 // compare number of bytes to store with the remaining buffer size 637 uint16_t bytes_to_copy = btstack_min(connection->data_len - connection->data_offset, max_payload_size - pos); 638 639 (void)memcpy(packet + pos, &connection->data[connection->data_offset], bytes_to_copy); 640 pos += bytes_to_copy; 641 connection->data_offset += bytes_to_copy; 642 643 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 644 } 645 646 static int avrcp_send_register_notification(avrcp_connection_t * connection, uint8_t event_id){ 647 uint8_t command[18]; 648 uint16_t pos = 0; 649 // transport header : transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 650 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 651 command[pos++] = (connection->transaction_id << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 652 653 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 654 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 655 command[pos++] = AVRCP_CTYPE_NOTIFY; 656 command[pos++] = (AVRCP_SUBUNIT_TYPE_PANEL << 3) | AVRCP_SUBUNIT_ID; 657 command[pos++] = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 658 659 big_endian_store_24(command, pos, BT_SIG_COMPANY_ID); 660 pos += 3; 661 command[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 662 command[pos++] = 0; // reserved(upper 6) | packet_type -> 0 663 big_endian_store_16(command, pos, 5); // parameter length 664 pos += 2; 665 command[pos++] = event_id; 666 big_endian_store_32(command, pos, 1); // send notification on playback position every second, for other notifications it is ignored 667 pos += 4; 668 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 669 } 670 671 static void avrcp_press_and_hold_timeout_handler(btstack_timer_source_t * timer){ 672 UNUSED(timer); 673 avrcp_connection_t * connection = (avrcp_connection_t*) btstack_run_loop_get_timer_context(timer); 674 btstack_run_loop_set_timer(&connection->controller_press_and_hold_cmd_timer, 2000); // 2 seconds timeout 675 btstack_run_loop_add_timer(&connection->controller_press_and_hold_cmd_timer); 676 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 677 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 678 } 679 680 static void avrcp_press_and_hold_timer_start(avrcp_connection_t * connection){ 681 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 682 btstack_run_loop_set_timer_handler(&connection->controller_press_and_hold_cmd_timer, avrcp_press_and_hold_timeout_handler); 683 btstack_run_loop_set_timer_context(&connection->controller_press_and_hold_cmd_timer, connection); 684 btstack_run_loop_set_timer(&connection->controller_press_and_hold_cmd_timer, 2000); // 2 seconds timeout 685 btstack_run_loop_add_timer(&connection->controller_press_and_hold_cmd_timer); 686 } 687 688 static void avrcp_press_and_hold_timer_stop(avrcp_connection_t * connection){ 689 connection->controller_press_and_hold_cmd_active = false; 690 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 691 } 692 693 694 static uint8_t avrcp_controller_request_pass_through_release_control_cmd(avrcp_connection_t * connection){ 695 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 696 if (connection->controller_press_and_hold_cmd_active){ 697 avrcp_press_and_hold_timer_stop(connection); 698 } 699 connection->operation_id = (avrcp_operation_id_t)(0x80 | connection->operation_id); 700 connection->transaction_id = avrcp_controller_get_next_transaction_label(connection); 701 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 702 return ERROR_CODE_SUCCESS; 703 } 704 705 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){ 706 UNUSED(playback_speed); 707 708 log_info("Send command %d", opid); 709 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 710 if (!connection){ 711 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 712 } 713 714 if (connection->state != AVCTP_CONNECTION_OPENED){ 715 log_error("Connection in wrong state %d, expected %d. avrcp cid 0x%02x", connection->state, AVCTP_CONNECTION_OPENED, avrcp_cid); 716 return ERROR_CODE_COMMAND_DISALLOWED; 717 } 718 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 719 avrcp_controller_pass_through_command_data_init(connection, opid); 720 721 connection->controller_press_and_hold_cmd_active = continuous_cmd; 722 if (connection->controller_press_and_hold_cmd_active){ 723 avrcp_press_and_hold_timer_start(connection); 724 } 725 726 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 727 return ERROR_CODE_SUCCESS; 728 } 729 730 static uint8_t request_single_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 731 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, false); 732 } 733 734 static uint8_t request_continuous_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 735 return avrcp_controller_request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, true); 736 } 737 738 static void avrcp_controller_get_capabilities_for_connection(avrcp_connection_t * connection, uint8_t capability_id){ 739 connection->state = AVCTP_W2_SEND_COMMAND; 740 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CAPABILITIES, true); 741 742 // Parameter Length 743 connection->data_len = 1; 744 connection->data[0] = capability_id; // capability ID 745 746 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 747 } 748 749 static uint8_t avrcp_controller_register_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 750 if ((connection->remote_capabilities_state == AVRCP_REMOTE_CAPABILITIES_KNOWN) && (connection->notifications_supported_by_target & (1 << event_id)) == 0){ 751 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 752 } 753 if ((connection->controller_notifications_to_deregister & (1 << event_id)) != 0){ 754 return ERROR_CODE_COMMAND_DISALLOWED; 755 } 756 if ( (connection->notifications_enabled & (1 << event_id)) != 0){ 757 return ERROR_CODE_SUCCESS; 758 } 759 connection->controller_notifications_to_register |= (1 << event_id); 760 761 switch (connection->remote_capabilities_state){ 762 case AVRCP_REMOTE_CAPABILITIES_NONE: 763 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_W4_QUERY_RESULT; 764 connection->controller_notifications_supported_by_target_suppress_emit_result = true; 765 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 766 break; 767 case AVRCP_REMOTE_CAPABILITIES_KNOWN: 768 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 769 break; 770 default: 771 break; 772 } 773 return ERROR_CODE_SUCCESS; 774 } 775 776 static uint8_t avrcp_controller_request_continuation(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id){ 777 connection->state = AVCTP_W2_SEND_COMMAND; 778 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, pdu_id, false); 779 780 // Parameter Length 781 connection->data_len = 3; 782 big_endian_store_16(connection->data, 0, 1); 783 connection->data[2] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 784 785 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 786 return ERROR_CODE_SUCCESS; 787 } 788 789 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 790 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE); 791 } 792 793 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 794 return avrcp_controller_request_continuation(connection, AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE); 795 } 796 797 static void avrcp_controller_handle_notification(avrcp_connection_t *connection, avrcp_command_type_t ctype, uint8_t *payload, uint16_t size) { 798 if (size < 1) return; 799 uint16_t pos = 0; 800 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) payload[pos++]; 801 if ( (event_id < AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) || (event_id > AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 802 return; 803 } 804 805 uint16_t event_mask = (1 << event_id); 806 uint16_t reset_event_mask = ~event_mask; 807 808 switch (ctype){ 809 case AVRCP_CTYPE_RESPONSE_REJECTED: 810 connection->controller_notifications_to_deregister &= reset_event_mask; 811 connection->controller_notifications_to_register &= reset_event_mask; 812 connection->controller_initial_status_reported &= reset_event_mask; 813 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, event_id, false); 814 return; 815 816 case AVRCP_CTYPE_RESPONSE_INTERIM: 817 // register as enabled 818 connection->notifications_enabled |= event_mask; 819 820 // check if initial value is already sent 821 if ((connection->controller_initial_status_reported & event_mask) != 0 ){ 822 return; 823 } 824 // emit event only once, initially 825 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, true); 826 connection->controller_initial_status_reported |= event_mask; 827 // emit initial value after this switch 828 break; 829 830 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 831 // received change, event is considered de-registered 832 // we are re-enabling it automatically, if it is not 833 // explicitly disabled 834 connection->notifications_enabled &= reset_event_mask; 835 if ((connection->controller_notifications_to_deregister & event_mask) == 0){ 836 avrcp_controller_register_notification(connection, event_id); 837 } else { 838 connection->controller_notifications_to_deregister &= reset_event_mask; 839 connection->controller_notifications_to_register &= reset_event_mask; 840 connection->controller_initial_status_reported &= reset_event_mask; 841 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_SUCCESS, event_id, false); 842 } 843 break; 844 845 default: 846 return; 847 } 848 849 avrcp_controller_emit_notification_for_event_id(connection->avrcp_cid, event_id, ctype, payload + pos, size - pos); 850 } 851 852 #ifdef ENABLE_AVCTP_FRAGMENTATION 853 static void avctp_reassemble_message(avrcp_connection_t * connection, avctp_packet_type_t packet_type, uint8_t *packet, uint16_t size){ 854 // after header (transaction label and packet type) 855 uint16_t pos; 856 uint16_t bytes_to_store; 857 858 switch (packet_type){ 859 case AVCTP_START_PACKET: 860 if (size < 2) return; 861 862 // store header 863 pos = 0; 864 connection->avctp_reassembly_buffer[pos] = packet[pos]; 865 pos++; 866 connection->avctp_reassembly_size = pos; 867 868 // NOTE: num packets not needed for reassembly, ignoring it does not pose security risk -> no need to store it 869 pos++; 870 871 // PID in reassembled packet is at offset 1, it will be read later after the avctp_reassemble_message with AVCTP_END_PACKET is called 872 873 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 874 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 875 connection->avctp_reassembly_size += bytes_to_store; 876 break; 877 878 case AVCTP_CONTINUE_PACKET: 879 case AVCTP_END_PACKET: 880 if (size < 1) return; 881 882 // store remaining data, ignore header 883 pos = 1; 884 bytes_to_store = btstack_min(size - pos, sizeof(connection->avctp_reassembly_buffer) - connection->avctp_reassembly_size); 885 memcpy(&connection->avctp_reassembly_buffer[connection->avctp_reassembly_size], &packet[pos], bytes_to_store); 886 connection->avctp_reassembly_size += bytes_to_store; 887 break; 888 889 default: 890 return; 891 } 892 } 893 #endif 894 895 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 896 if (size < 6u) return; 897 uint8_t pdu_id; 898 avrcp_packet_type_t vendor_dependent_avrcp_packet_type; 899 900 uint16_t pos = 0; 901 connection->controller_last_confirmed_transaction_id = packet[pos] >> 4; 902 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((packet[pos] >> 1) & 0x01); 903 avctp_packet_type_t packet_type = (avctp_packet_type_t)((packet[pos] >> 2) & 0x03); 904 pos++; 905 906 if (frame_type != AVRCP_RESPONSE_FRAME) return; 907 908 switch (packet_type){ 909 case AVCTP_SINGLE_PACKET: 910 break; 911 912 #ifdef ENABLE_AVCTP_FRAGMENTATION 913 case AVCTP_START_PACKET: 914 case AVCTP_CONTINUE_PACKET: 915 avctp_reassemble_message(connection, packet_type, packet, size); 916 return; 917 918 case AVCTP_END_PACKET: 919 avctp_reassemble_message(connection, packet_type, packet, size); 920 921 packet = connection->avctp_reassembly_buffer; 922 size = connection->avctp_reassembly_size; 923 break; 924 #endif 925 926 default: 927 return; 928 } 929 930 pos += 2; // PID 931 932 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 933 934 #ifdef ENABLE_LOG_INFO 935 uint8_t byte_value = packet[pos]; 936 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 937 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 938 #endif 939 pos++; 940 941 uint8_t opcode = packet[pos++]; 942 uint16_t param_length; 943 944 switch (opcode){ 945 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 946 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 947 connection->state = AVCTP_CONNECTION_OPENED; 948 949 #ifdef ENABLE_LOG_INFO 950 // page, extension code (1) 951 pos++; 952 uint8_t unit_type = packet[pos] >> 3; 953 uint8_t max_subunit_ID = packet[pos] & 0x07; 954 log_info("SUBUNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), target_unit_type 0x%02x, max_subunit_ID %d", ctype, subunit_type, subunit_id, opcode, unit_type, max_subunit_ID); 955 #endif 956 break; 957 } 958 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 959 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 960 connection->state = AVCTP_CONNECTION_OPENED; 961 962 #ifdef ENABLE_LOG_INFO 963 // byte value 7 (1) 964 pos++; 965 uint8_t unit_type = packet[pos] >> 3; 966 uint8_t unit = packet[pos] & 0x07; 967 pos++; 968 uint32_t company_id = big_endian_read_24(packet, pos); 969 log_info("UNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), target_unit_type 0x%02x, unit %d, company_id 0x%06" PRIx32, 970 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 971 #endif 972 break; 973 } 974 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 975 if ((size - pos) < 7){ 976 return; 977 } 978 // Company ID (3) 979 pos += 3; 980 pdu_id = packet[pos++]; 981 vendor_dependent_avrcp_packet_type = (avrcp_packet_type_t)(packet[pos++] & 0x03); 982 param_length = big_endian_read_16(packet, pos); 983 pos += 2; 984 985 if ((size - pos) < param_length) { 986 return; 987 } 988 989 // handle asynchronous notifications, without changing state 990 if (pdu_id == AVRCP_PDU_ID_REGISTER_NOTIFICATION){ 991 avrcp_controller_handle_notification(connection, ctype, packet + pos, size - pos); 992 break; 993 } 994 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 995 connection->state = AVCTP_CONNECTION_OPENED; 996 997 log_info("VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 998 switch (pdu_id){ 999 case AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE:{ 1000 uint8_t num_attributes = packet[pos++]; 1001 int i; 1002 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 1003 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 1004 for (i = 0; i < num_attributes; i++){ 1005 uint8_t attribute_id = packet[pos++]; 1006 uint8_t value = packet[pos++]; 1007 switch (attribute_id){ 1008 case 0x02: 1009 repeat_mode = (avrcp_repeat_mode_t) value; 1010 break; 1011 case 0x03: 1012 shuffle_mode = (avrcp_shuffle_mode_t) value; 1013 break; 1014 default: 1015 break; 1016 } 1017 } 1018 avrcp_controller_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 1019 break; 1020 } 1021 1022 case AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE:{ 1023 uint16_t offset = 0; 1024 uint8_t event[6]; 1025 event[offset++] = HCI_EVENT_AVRCP_META; 1026 event[offset++] = sizeof(event) - 2; 1027 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 1028 little_endian_store_16(event, offset, connection->avrcp_cid); 1029 offset += 2; 1030 event[offset++] = ctype; 1031 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1032 break; 1033 } 1034 1035 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 1036 uint16_t offset = 0; 1037 uint8_t event[7]; 1038 event[offset++] = HCI_EVENT_AVRCP_META; 1039 event[offset++] = sizeof(event) - 2; 1040 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 1041 little_endian_store_16(event, offset, connection->avrcp_cid); 1042 offset += 2; 1043 event[offset++] = ctype; 1044 event[offset++] = packet[pos++]; 1045 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1046 break; 1047 } 1048 1049 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 1050 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 1051 uint8_t capability_count = 0; 1052 if (param_length > 1){ 1053 capability_count = packet[pos++]; 1054 } 1055 uint16_t i; 1056 uint16_t offset; 1057 uint8_t event[10]; 1058 1059 switch (capability_id){ 1060 1061 case AVRCP_CAPABILITY_ID_COMPANY: 1062 for (i = 0; (i < capability_count) && ((size - pos) >= 3); i++){ 1063 uint32_t company_id = big_endian_read_24(packet, pos); 1064 pos += 3; 1065 log_info(" 0x%06" PRIx32 ", ", company_id); 1066 1067 offset = 0; 1068 event[offset++] = HCI_EVENT_AVRCP_META; 1069 event[offset++] = sizeof(event) - 2; 1070 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID; 1071 little_endian_store_16(event, offset, connection->avrcp_cid); 1072 offset += 2; 1073 event[offset++] = ctype; 1074 event[offset++] = 0; 1075 little_endian_store_24(event, offset, company_id); 1076 offset += 3; 1077 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1078 } 1079 1080 offset = 0; 1081 event[offset++] = HCI_EVENT_AVRCP_META; 1082 event[offset++] = sizeof(event) - 2; 1083 event[offset++] = AVRCP_SUBEVENT_GET_CAPABILITY_COMPANY_ID_DONE; 1084 little_endian_store_16(event, offset, connection->avrcp_cid); 1085 offset += 2; 1086 event[offset++] = ctype; 1087 event[offset++] = 0; 1088 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, offset); 1089 break; 1090 1091 case AVRCP_CAPABILITY_ID_EVENT: 1092 for (i = 0; (i < capability_count) && ((size - pos) >= 1); i++){ 1093 uint8_t event_id = packet[pos++]; 1094 connection->notifications_supported_by_target |= (1 << event_id); 1095 } 1096 1097 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_KNOWN; 1098 1099 // if the get supported events query is triggered by avrcp_controller_enable_notification call, 1100 // avrcp_controller_emit_supported_events should be suppressed 1101 if (connection->controller_notifications_supported_by_target_suppress_emit_result){ 1102 connection->controller_notifications_supported_by_target_suppress_emit_result = false; 1103 // also, notification might not be supported 1104 // if so, emit AVRCP_SUBEVENT_ENABLE_NOTIFICATION_COMPLETE event to app, 1105 // and update controller_notifications_to_register bitmap 1106 for (i = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; i < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; i++){ 1107 if ((connection->controller_notifications_to_register & (1 << i)) != 0){ 1108 if ((connection->notifications_supported_by_target & (1 << i)) == 0){ 1109 avrcp_controller_emit_notification_complete(connection, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE, (uint8_t) i, false); 1110 connection->controller_notifications_to_register &= ~(1 << i); 1111 } 1112 } 1113 } 1114 break; 1115 } 1116 // supported events are emitted only if the get supported events query 1117 // is triggered by avrcp_controller_get_supported_events call 1118 avrcp_controller_emit_supported_events(connection); 1119 break; 1120 1121 default: 1122 // ignore 1123 break; 1124 } 1125 break; 1126 } 1127 1128 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 1129 uint32_t song_length = big_endian_read_32(packet, pos); 1130 pos += 4; 1131 uint32_t song_position = big_endian_read_32(packet, pos); 1132 pos += 4; 1133 uint8_t play_status = packet[pos]; 1134 1135 uint8_t event[15]; 1136 int offset = 0; 1137 event[offset++] = HCI_EVENT_AVRCP_META; 1138 event[offset++] = sizeof(event) - 2; 1139 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 1140 little_endian_store_16(event, offset, connection->avrcp_cid); 1141 offset += 2; 1142 event[offset++] = ctype; 1143 little_endian_store_32(event, offset, song_length); 1144 offset += 4; 1145 little_endian_store_32(event, offset, song_position); 1146 offset += 4; 1147 event[offset++] = play_status; 1148 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1149 break; 1150 } 1151 1152 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES: 1153 switch (vendor_dependent_avrcp_packet_type){ 1154 case AVRCP_START_PACKET: 1155 case AVRCP_SINGLE_PACKET: 1156 avrcp_parser_reset(connection); 1157 connection->list_size = param_length; 1158 // num_attributes 1159 pos++; 1160 1161 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1162 if (vendor_dependent_avrcp_packet_type == AVRCP_START_PACKET){ 1163 avrcp_controller_request_continue_response(connection); 1164 return; 1165 } 1166 break; 1167 case AVRCP_CONTINUE_PACKET: 1168 case AVRCP_END_PACKET: 1169 connection->controller_num_received_fragments++; 1170 1171 if (connection->controller_num_received_fragments < connection->controller_max_num_fragments){ 1172 avrcp_controller_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 1173 1174 if (vendor_dependent_avrcp_packet_type == AVRCP_CONTINUE_PACKET){ 1175 avrcp_controller_request_continue_response(connection); 1176 return; 1177 } 1178 } else { 1179 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 1180 avrcp_parser_reset(connection); 1181 avrcp_controller_request_abort_continuation(connection); 1182 return; 1183 } 1184 break; 1185 default: 1186 btstack_assert(false); 1187 break; 1188 } 1189 break; 1190 1191 default: 1192 // custom command response comes here 1193 switch (pdu_id){ 1194 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 1195 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 1196 break; 1197 default: 1198 if (pdu_id != connection->pdu_id) { 1199 break; 1200 } 1201 uint8_t *in_place_buffer = packet + pos - 9; 1202 avrcp_controller_prepare_custom_command_response(connection, param_length, 1203 in_place_buffer); 1204 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, in_place_buffer, 1205 param_length + 9); 1206 1207 break; 1208 } 1209 break; 1210 } 1211 break; 1212 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 1213 if ((size - pos) < 1) return; 1214 uint8_t operation_id = packet[pos++]; 1215 UNUSED(pos); 1216 switch (connection->state){ 1217 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1218 // trigger release for simple command: 1219 if (!connection->controller_press_and_hold_cmd_active){ 1220 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1221 break; 1222 } 1223 // for press and hold, send release if it just has been requested, otherwise, wait for next repeat 1224 if (connection->controller_press_and_hold_cmd_release){ 1225 connection->controller_press_and_hold_cmd_release = false; 1226 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 1227 } else { 1228 connection->state = AVCTP_W4_STOP; 1229 } 1230 break; 1231 case AVCTP_W2_RECEIVE_RESPONSE: 1232 connection->state = AVCTP_CONNECTION_OPENED; 1233 break; 1234 default: 1235 break; 1236 } 1237 if (connection->state == AVCTP_W4_STOP){ 1238 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 1239 } 1240 if (connection->state == AVCTP_CONNECTION_OPENED) { 1241 // RELEASE response 1242 operation_id = operation_id & 0x7F; 1243 avrcp_controller_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 1244 } 1245 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 1246 // PRESS response 1247 avrcp_controller_request_pass_through_release_control_cmd(connection); 1248 } 1249 break; 1250 } 1251 default: 1252 break; 1253 } 1254 1255 // trigger pending notification reqistrations 1256 if ((connection->state == AVCTP_CONNECTION_OPENED) && connection->controller_notifications_to_register){ 1257 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1258 } 1259 } 1260 1261 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 1262 // identifier (9) + num attributes (1) + attributes (4 * num attributes) 1263 uint8_t get_element_attributes_command[9+8*((AVRCP_MEDIA_ATTR_RESERVED-AVRCP_MEDIA_ATTR_TITLE) + 1)]; 1264 uint16_t pos; 1265 uint16_t num_attributes_index; 1266 uint8_t i; 1267 1268 switch (connection->state){ 1269 case AVCTP_W2_SEND_PRESS_COMMAND: 1270 avrcp_send_cmd_with_avctp_fragmentation(connection); 1271 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 1272 return; 1273 1274 case AVCTP_W2_SEND_RELEASE_COMMAND: 1275 avrcp_send_cmd_with_avctp_fragmentation(connection); 1276 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1277 return; 1278 1279 case AVCTP_W2_SEND_COMMAND: 1280 avrcp_send_cmd_with_avctp_fragmentation(connection); 1281 if (connection->data_offset < connection->data_len){ 1282 // continue AVCTP fragmentation 1283 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1284 return; 1285 } 1286 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1287 return; 1288 case AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST: 1289 // build command in local buffer 1290 pos = 0; 1291 connection->data = get_element_attributes_command; 1292 // write identifier 1293 memset(connection->data, 0, 8); 1294 pos += 8; 1295 num_attributes_index = pos; 1296 // If num_attributes is set to zero, all attribute information shall be returned, 1297 // and the AttributeID field is omitted 1298 connection->data[num_attributes_index] = 0; 1299 pos++; 1300 for (i = 0; i < (uint8_t)AVRCP_MEDIA_ATTR_RESERVED - (uint8_t)AVRCP_MEDIA_ATTR_TITLE; i++){ 1301 if ((connection->controller_element_attributes & (1<<i)) != 0){ 1302 // every attribute is 4 bytes long 1303 big_endian_store_32(connection->data, pos, AVRCP_MEDIA_ATTR_TITLE + i); 1304 pos += 4; 1305 connection->data[num_attributes_index]++; 1306 } 1307 } 1308 1309 // Parameter Length 1310 connection->data_len = pos; 1311 1312 log_info("AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST, len %u", connection->data_len); 1313 1314 // send data - assume it will fit into one packet 1315 avrcp_send_cmd_with_avctp_fragmentation(connection); 1316 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 1317 return; 1318 default: 1319 break; 1320 } 1321 1322 // send register notification if queued, 1323 // avrcp_handle_l2cap_data_packet_for_signaling_connection will trigger next one 1324 if (connection->controller_notifications_to_register != 0){ 1325 uint8_t event_id; 1326 for (event_id = (uint8_t)AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t)AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 1327 if (connection->controller_notifications_to_register & (1 << event_id)){ 1328 connection->controller_notifications_to_register &= ~ (1 << event_id); 1329 avrcp_send_register_notification(connection, event_id); 1330 return; 1331 } 1332 } 1333 } 1334 } 1335 1336 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1337 avrcp_connection_t * connection; 1338 1339 switch (packet_type) { 1340 case L2CAP_DATA_PACKET: 1341 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1342 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1343 break; 1344 1345 case HCI_EVENT_PACKET: 1346 switch (hci_event_packet_get_type(packet)){ 1347 case L2CAP_EVENT_CAN_SEND_NOW: 1348 connection = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 1349 avrcp_controller_handle_can_send_now(connection); 1350 break; 1351 default: 1352 break; 1353 } 1354 default: 1355 break; 1356 } 1357 } 1358 1359 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){ 1360 if (service_name == NULL){ 1361 service_name = avrcp_default_controller_service_name; 1362 } 1363 if (service_provider_name == NULL){ 1364 service_provider_name = avrcp_default_controller_service_provider_name; 1365 } 1366 avrcp_create_sdp_record(true, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 1367 } 1368 1369 void avrcp_controller_init(void){ 1370 avrcp_controller_context.role = AVRCP_CONTROLLER; 1371 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 1372 avrcp_register_controller_packet_handler(&avrcp_controller_packet_handler); 1373 } 1374 1375 void avrcp_controller_deinit(void){ 1376 memset(&avrcp_controller_context, 0, sizeof(avrcp_context_t)); 1377 } 1378 1379 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 1380 btstack_assert(callback != NULL); 1381 avrcp_controller_context.avrcp_callback = callback; 1382 } 1383 1384 1385 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 1386 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1387 } 1388 1389 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 1390 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1391 } 1392 1393 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 1394 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1395 } 1396 1397 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 1398 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1399 } 1400 1401 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 1402 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1403 } 1404 1405 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 1406 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1407 } 1408 1409 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1410 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1411 } 1412 1413 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1414 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1415 } 1416 1417 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1418 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1419 } 1420 1421 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1422 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1423 } 1424 1425 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1426 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1427 } 1428 1429 /* start continuous cmds */ 1430 1431 uint8_t avrcp_controller_start_press_and_hold_cmd(uint16_t avrcp_cid, avrcp_operation_id_t operation_id){ 1432 return request_continuous_pass_through_press_control_cmd(avrcp_cid, operation_id, 0); 1433 } 1434 1435 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1436 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1437 } 1438 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1439 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1440 } 1441 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1442 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1443 } 1444 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1445 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1446 } 1447 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1448 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1449 } 1450 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1451 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1452 } 1453 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1454 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1455 } 1456 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1457 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1458 } 1459 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1460 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1461 } 1462 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1463 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1464 } 1465 1466 /* stop continuous cmds */ 1467 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1468 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1469 if (!connection){ 1470 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1471 } 1472 1473 switch (connection->state){ 1474 // respond when we receive response for (repeated) press command 1475 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 1476 connection->controller_press_and_hold_cmd_release = true; 1477 break; 1478 1479 // release already sent or on the way, nothing to do 1480 case AVCTP_W2_RECEIVE_RESPONSE: 1481 case AVCTP_W2_SEND_RELEASE_COMMAND: 1482 break; 1483 1484 // about to send next repeated press command or wait for it -> release right away 1485 case AVCTP_W2_SEND_PRESS_COMMAND: 1486 case AVCTP_W4_STOP: 1487 return avrcp_controller_request_pass_through_release_control_cmd(connection); 1488 1489 // otherwise reject request 1490 default: 1491 return ERROR_CODE_COMMAND_DISALLOWED; 1492 } 1493 return ERROR_CODE_SUCCESS; 1494 } 1495 1496 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1497 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1498 if (!connection){ 1499 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1500 } 1501 return avrcp_controller_register_notification(connection, event_id); 1502 } 1503 1504 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1505 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1506 if (!connection){ 1507 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1508 } 1509 if (connection->remote_capabilities_state != AVRCP_REMOTE_CAPABILITIES_KNOWN){ 1510 return ERROR_CODE_COMMAND_DISALLOWED; 1511 } 1512 1513 if ((connection->notifications_supported_by_target & (1 << event_id)) == 0){ 1514 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1515 } 1516 1517 if ((connection->notifications_enabled & (1 << event_id)) == 0){ 1518 return ERROR_CODE_SUCCESS; 1519 } 1520 1521 connection->controller_notifications_to_deregister |= (1 << event_id); 1522 return ERROR_CODE_SUCCESS; 1523 } 1524 1525 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 1526 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1527 if (!connection){ 1528 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1529 } 1530 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1531 1532 connection->state = AVCTP_W2_SEND_COMMAND; 1533 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_UNIT_INFO, AVRCP_CTYPE_STATUS, 1534 AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, AVRCP_PDU_ID_UNDEFINED, 1535 0); 1536 1537 connection->data = connection->message_body; 1538 memset(connection->data, 0xFF, 5); 1539 connection->data_len = 5; 1540 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1541 return ERROR_CODE_SUCCESS; 1542 } 1543 1544 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 1545 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1546 if (!connection){ 1547 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1548 } 1549 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1550 1551 connection->state = AVCTP_W2_SEND_COMMAND; 1552 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_SUBUNIT_INFO, AVRCP_CTYPE_STATUS, 1553 AVRCP_SUBUNIT_TYPE_UNIT, AVRCP_SUBUNIT_ID_IGNORE, AVRCP_PDU_ID_UNDEFINED, 1554 0); 1555 1556 connection->data = connection->message_body; 1557 memset(connection->data, 0xFF, 5); 1558 connection->data[0] = 7; // page: 0, extension_code: 7 1559 connection->data_len = 5; 1560 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1561 return ERROR_CODE_SUCCESS; 1562 } 1563 1564 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 1565 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1566 if (!connection){ 1567 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1568 } 1569 if (connection->state != AVCTP_CONNECTION_OPENED){ 1570 return ERROR_CODE_COMMAND_DISALLOWED; 1571 } 1572 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_COMPANY); 1573 return ERROR_CODE_SUCCESS; 1574 } 1575 1576 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 1577 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1578 if (!connection){ 1579 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1580 } 1581 if (connection->state != AVCTP_CONNECTION_OPENED){ 1582 return ERROR_CODE_COMMAND_DISALLOWED; 1583 } 1584 1585 switch (connection->remote_capabilities_state){ 1586 case AVRCP_REMOTE_CAPABILITIES_NONE: 1587 connection->remote_capabilities_state = AVRCP_REMOTE_CAPABILITIES_W4_QUERY_RESULT; 1588 avrcp_controller_get_capabilities_for_connection(connection, AVRCP_CAPABILITY_ID_EVENT); 1589 break; 1590 case AVRCP_REMOTE_CAPABILITIES_KNOWN: 1591 avrcp_controller_emit_supported_events(connection); 1592 break; 1593 default: 1594 break; 1595 } 1596 return ERROR_CODE_SUCCESS; 1597 } 1598 1599 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1600 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1601 if (!connection){ 1602 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1603 } 1604 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1605 1606 connection->state = AVCTP_W2_SEND_COMMAND; 1607 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_PLAY_STATUS, true); 1608 1609 connection->data_len = 0; 1610 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1611 return ERROR_CODE_SUCCESS; 1612 } 1613 1614 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1615 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1616 if (!connection){ 1617 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1618 } 1619 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1620 1621 connection->state = AVCTP_W2_SEND_COMMAND; 1622 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ADDRESSED_PLAYER, true); 1623 1624 connection->data_len = 2; 1625 big_endian_store_16(connection->data, 0, addressed_player_id); 1626 1627 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1628 return ERROR_CODE_SUCCESS; 1629 } 1630 1631 uint8_t avrcp_controller_get_element_attributes(uint16_t avrcp_cid, uint8_t num_attributes, avrcp_media_attribute_id_t * attributes){ 1632 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1633 if (!connection){ 1634 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1635 } 1636 1637 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1638 1639 if (num_attributes >= AVRCP_MEDIA_ATTR_RESERVED) { 1640 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 1641 } 1642 1643 connection->state = AVCTP_W2_SEND_GET_ELEMENT_ATTRIBUTES_REQUEST; 1644 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES, true); 1645 1646 // collect element attributes 1647 uint8_t i; 1648 uint16_t attributes_set = 0; 1649 for (i = 0; i < num_attributes; i++){ 1650 // ignore invalid attribute ID and "get all attributes" 1651 if (AVRCP_MEDIA_ATTR_ALL < attributes[i] && attributes[i] < AVRCP_MEDIA_ATTR_RESERVED){ 1652 attributes_set |= 1 << (attributes[i] - AVRCP_MEDIA_ATTR_TITLE); 1653 } 1654 } 1655 connection->controller_element_attributes = attributes_set; 1656 1657 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1658 return ERROR_CODE_SUCCESS; 1659 } 1660 1661 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1662 return avrcp_controller_get_element_attributes(avrcp_cid, 0, NULL); 1663 } 1664 1665 uint8_t avrcp_controller_get_now_playing_info_for_media_attribute_id(uint16_t avrcp_cid, avrcp_media_attribute_id_t media_attribute_id){ 1666 if (media_attribute_id == AVRCP_MEDIA_ATTR_ALL){ 1667 return avrcp_controller_get_now_playing_info(avrcp_cid); 1668 } 1669 avrcp_media_attribute_id_t media_attrs[1]; 1670 media_attrs[0] = media_attribute_id; 1671 return avrcp_controller_get_element_attributes(avrcp_cid, 1, media_attrs); 1672 } 1673 1674 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1675 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1676 if (!connection){ 1677 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1678 } 1679 1680 // 1681 // allow sending of multiple set abs volume commands without waiting for response 1682 // 1683 uint8_t status = ERROR_CODE_COMMAND_DISALLOWED; 1684 switch (connection->state){ 1685 case AVCTP_CONNECTION_OPENED: 1686 status = ERROR_CODE_SUCCESS; 1687 break; 1688 case AVCTP_W2_RECEIVE_RESPONSE: 1689 // - is pending response also set abs volume 1690 if (connection->command_opcode != AVRCP_CMD_OPCODE_VENDOR_DEPENDENT) break; 1691 if (connection->command_type != AVRCP_CTYPE_CONTROL) break; 1692 if (connection->subunit_type != AVRCP_SUBUNIT_TYPE_PANEL) break; 1693 if (connection->subunit_id != AVRCP_SUBUNIT_ID) break; 1694 if (connection->pdu_id != AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME) break; 1695 // - is next transaction id valid in window 1696 if (avrcp_controller_is_transaction_id_valid(connection, avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter)) == false) break; 1697 status = ERROR_CODE_SUCCESS; 1698 break; 1699 default: 1700 break; 1701 } 1702 if (status != ERROR_CODE_SUCCESS) return status; 1703 1704 connection->state = AVCTP_W2_SEND_COMMAND; 1705 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME, true); 1706 1707 // Parameter Length 1708 connection->data_len = 1; 1709 connection->data[0] = volume; 1710 1711 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1712 return ERROR_CODE_SUCCESS; 1713 } 1714 1715 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 1716 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1717 if (!connection){ 1718 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1719 } 1720 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1721 1722 connection->state = AVCTP_W2_SEND_COMMAND; 1723 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_STATUS, AVRCP_PDU_ID_GET_CURRENT_PLAYER_APPLICATION_SETTING_VALUE, true); 1724 1725 connection->data_len = 5; 1726 connection->data[0] = 4; // NumPlayerApplicationSettingAttributeID 1727 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1728 connection->data[1] = 0x01; // equalizer (1-OFF, 2-ON) 1729 connection->data[2] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1730 connection->data[3] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1731 connection->data[4] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1732 1733 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1734 return ERROR_CODE_SUCCESS; 1735 } 1736 1737 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1738 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1739 if (!connection){ 1740 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1741 } 1742 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1743 1744 connection->state = AVCTP_W2_SEND_COMMAND; 1745 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_SET_PLAYER_APPLICATION_SETTING_VALUE, true); 1746 1747 // Parameter Length 1748 connection->data_len = 3; 1749 connection->data[0] = 2; 1750 connection->data[1] = attr_id; 1751 connection->data[2] = attr_value; 1752 1753 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1754 return ERROR_CODE_SUCCESS; 1755 } 1756 1757 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1758 if ((mode < AVRCP_SHUFFLE_MODE_OFF) || (mode > AVRCP_SHUFFLE_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1759 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1760 } 1761 1762 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1763 if ((mode < AVRCP_REPEAT_MODE_OFF) || (mode > AVRCP_REPEAT_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1764 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1765 } 1766 1767 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1768 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1769 if (!connection){ 1770 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1771 } 1772 if (connection->state != AVCTP_CONNECTION_OPENED){ 1773 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1774 return ERROR_CODE_COMMAND_DISALLOWED; 1775 } 1776 connection->state = AVCTP_W2_SEND_COMMAND; 1777 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_PLAY_ITEM, true); 1778 1779 // Parameter Length 1780 connection->data_len = 11; 1781 connection->data[0] = scope; 1782 memset(&connection->data[1], 0, 8); 1783 if (uid){ 1784 (void)memcpy(&connection->data[1], uid, 8); 1785 } 1786 big_endian_store_16(connection->data, 9, uid_counter); 1787 1788 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1789 return ERROR_CODE_SUCCESS; 1790 } 1791 1792 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){ 1793 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1794 if (!connection){ 1795 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1796 } 1797 if (connection->state != AVCTP_CONNECTION_OPENED){ 1798 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1799 return ERROR_CODE_COMMAND_DISALLOWED; 1800 } 1801 1802 connection->state = AVCTP_W2_SEND_COMMAND; 1803 avrcp_controller_vendor_dependent_command_data_init(connection, AVRCP_CTYPE_CONTROL, AVRCP_PDU_ID_ADD_TO_NOW_PLAYING, true); 1804 1805 // Parameter Length 1806 connection->data_len = 11; 1807 connection->data[0] = scope; 1808 memset(&connection->data[1], 0, 8); 1809 if (uid){ 1810 (void)memcpy(&connection->data[1], uid, 8); 1811 } 1812 big_endian_store_16(connection->data, 9, uid_counter); 1813 1814 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1815 return ERROR_CODE_SUCCESS; 1816 } 1817 1818 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1819 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1820 if (!connection){ 1821 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1822 } 1823 connection->controller_max_num_fragments = max_num_fragments; 1824 return ERROR_CODE_SUCCESS; 1825 } 1826 1827 1828 uint8_t avrcp_controller_send_custom_command(uint16_t avrcp_cid, 1829 avrcp_command_type_t command_type, 1830 avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 1831 avrcp_pdu_id_t pdu_id, uint32_t company_id, 1832 const uint8_t * data, uint16_t data_len){ 1833 1834 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1835 if (!connection){ 1836 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1837 } 1838 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1839 1840 connection->state = AVCTP_W2_SEND_COMMAND; 1841 avrcp_controller_custom_command_data_init(connection, AVRCP_CMD_OPCODE_VENDOR_DEPENDENT, command_type, subunit_type, 1842 subunit_id, pdu_id, company_id); 1843 1844 connection->data = (uint8_t *)data; 1845 connection->data_len = data_len; 1846 1847 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1848 return ERROR_CODE_SUCCESS; 1849 } 1850 1851 uint8_t avrcp_controller_force_send_press_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid){ 1852 avrcp_connection_t * connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1853 if (!connection){ 1854 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1855 } 1856 if (connection->state < AVCTP_CONNECTION_OPENED){ 1857 return ERROR_CODE_COMMAND_DISALLOWED; 1858 } 1859 1860 connection->state = AVCTP_W2_SEND_COMMAND; 1861 avrcp_controller_pass_through_command_data_init(connection, opid); 1862 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1863 return ERROR_CODE_SUCCESS; 1864 }