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_target.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <inttypes.h> 45 46 #include "btstack.h" 47 #include "classic/avrcp.h" 48 49 #define AVRCP_ATTR_HEADER_LEN 8 50 51 static const uint8_t AVRCP_NOTIFICATION_TRACK_SELECTED[] = {0,0,0,0,0,0,0,0}; 52 static const uint8_t AVRCP_NOTIFICATION_TRACK_NOT_SELECTED[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; 53 54 avrcp_context_t avrcp_target_context; 55 56 static int avrcp_target_supports_browsing(uint16_t target_supported_features){ 57 return target_supported_features & (1 << AVRCP_TARGET_SUPPORTED_FEATURE_BROWSING); 58 } 59 60 void avrcp_target_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 61 avrcp_create_sdp_record(0, service, service_record_handle, avrcp_target_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 62 } 63 64 static void avrcp_target_emit_operation(btstack_packet_handler_t callback, uint16_t avrcp_cid, avrcp_operation_id_t operation_id, uint8_t operands_length, uint8_t operand){ 65 if (!callback) return; 66 uint8_t event[8]; 67 int pos = 0; 68 event[pos++] = HCI_EVENT_AVRCP_META; 69 event[pos++] = sizeof(event) - 2; 70 event[pos++] = AVRCP_SUBEVENT_OPERATION; 71 little_endian_store_16(event, pos, avrcp_cid); 72 pos += 2; 73 event[pos++] = operation_id; 74 event[pos++] = operands_length; 75 event[pos++] = operand; 76 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 77 } 78 79 static void avrcp_target_emit_volume_changed(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t absolute_volume){ 80 if (!callback) return; 81 uint8_t event[7]; 82 int offset = 0; 83 event[offset++] = HCI_EVENT_AVRCP_META; 84 event[offset++] = sizeof(event) - 2; 85 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 86 little_endian_store_16(event, offset, avrcp_cid); 87 offset += 2; 88 event[offset++] = AVRCP_CTYPE_NOTIFY; 89 event[offset++] = absolute_volume; 90 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 91 } 92 93 static void avrcp_target_emit_respond_vendor_dependent_query(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t subevent_id){ 94 if (!callback) return; 95 uint8_t event[5]; 96 int pos = 0; 97 event[pos++] = HCI_EVENT_AVRCP_META; 98 event[pos++] = sizeof(event) - 2; 99 event[pos++] = subevent_id; 100 little_endian_store_16(event, pos, avrcp_cid); 101 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 102 } 103 104 static uint16_t avrcp_target_pack_single_element_attribute_number(uint8_t * packet, uint16_t pos, avrcp_media_attribute_id_t attr_id, uint32_t value){ 105 if ((attr_id < 1) || (attr_id > AVRCP_MEDIA_ATTR_COUNT)) return 0; 106 uint16_t attr_value_length = sprintf((char *)(packet+pos+8), "%0" PRIu32, value); 107 big_endian_store_32(packet, pos, attr_id); 108 pos += 4; 109 big_endian_store_16(packet, pos, RFC2978_CHARSET_MIB_UTF8); 110 pos += 2; 111 big_endian_store_16(packet, pos, attr_value_length); 112 pos += 2; 113 return 8 + attr_value_length; 114 } 115 116 static uint16_t avrcp_target_pack_single_element_attribute_string(uint8_t * packet, uint16_t pos, rfc2978_charset_mib_enumid_t mib_enumid, avrcp_media_attribute_id_t attr_id, uint8_t * attr_value, uint16_t attr_value_to_copy, uint16_t attr_value_size, uint8_t header){ 117 if (attr_value_size == 0) return 0; 118 if ((attr_id < 1) || (attr_id > AVRCP_MEDIA_ATTR_COUNT)) return 0; 119 if (header){ 120 big_endian_store_32(packet, pos, attr_id); 121 pos += 4; 122 big_endian_store_16(packet, pos, mib_enumid); 123 pos += 2; 124 big_endian_store_16(packet, pos, attr_value_size); 125 pos += 2; 126 } 127 memcpy(packet+pos, attr_value, attr_value_to_copy); 128 pos += attr_value_size; 129 return (header * 8) + attr_value_size; 130 } 131 132 static int avrcp_target_abort_continue_response(uint16_t cid, avrcp_connection_t * connection){ 133 uint16_t pos = 0; 134 l2cap_reserve_packet_buffer(); 135 uint8_t * packet = l2cap_get_outgoing_buffer(); 136 137 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 138 connection->command_type = AVRCP_CTYPE_RESPONSE_ACCEPTED; 139 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 140 connection->subunit_id = AVRCP_SUBUNIT_ID; 141 142 packet[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 143 // Profile IDentifier (PID) 144 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 145 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 146 147 // command_type 148 packet[pos++] = connection->command_type; 149 // subunit_type | subunit ID 150 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 151 // opcode 152 packet[pos++] = (uint8_t)connection->command_opcode; 153 154 // company id is 3 bytes long 155 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 156 pos += 3; 157 158 packet[pos++] = AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE; 159 160 // reserve byte for packet type 161 packet[pos++] = AVRCP_SINGLE_PACKET; 162 big_endian_store_16(packet, pos, 0); 163 pos += 2; 164 return l2cap_send_prepared(cid, pos); 165 } 166 167 static int avrcp_target_send_now_playing_info(uint16_t cid, avrcp_connection_t * connection){ 168 uint16_t pos = 0; 169 l2cap_reserve_packet_buffer(); 170 uint8_t * packet = l2cap_get_outgoing_buffer(); 171 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 172 173 packet[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 174 // Profile IDentifier (PID) 175 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 176 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 177 178 // command_type 179 packet[pos++] = connection->command_type; 180 // subunit_type | subunit ID 181 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 182 // opcode 183 packet[pos++] = (uint8_t)connection->command_opcode; 184 185 // company id is 3 bytes long 186 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 187 pos += 3; 188 189 packet[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 190 191 // reserve byte for packet type 192 uint8_t pos_packet_type = pos; 193 pos++; 194 195 uint16_t playing_info_buffer_len_position = pos; 196 pos += 2; 197 // printf("connection->next_attr_id %d \n", connection->next_attr_id); 198 if (connection->next_attr_id == AVRCP_MEDIA_ATTR_NONE){ 199 packet[pos_packet_type] = AVRCP_SINGLE_PACKET; 200 connection->packet_type = AVRCP_SINGLE_PACKET; 201 packet[pos++] = count_set_bits_uint32(connection->now_playing_info_attr_bitmap); 202 connection->next_attr_id = AVRCP_MEDIA_ATTR_ALL; 203 } 204 // printf("updated connection->next_attr_id %d, connection->attribute_value_offset %d \n", connection->next_attr_id, connection->attribute_value_offset); 205 206 uint8_t fragmented = 0; 207 int num_free_bytes = size - pos - 2; 208 uint8_t MAX_NUMBER_ATTR_LEN = 10; 209 210 while (!fragmented && (num_free_bytes > 0) && (connection->next_attr_id <= AVRCP_MEDIA_ATTR_SONG_LENGTH_MS)){ 211 avrcp_media_attribute_id_t attr_id = connection->next_attr_id; 212 int attr_index = attr_id - 1; 213 214 if (connection->now_playing_info_attr_bitmap & (1 << attr_id)){ 215 int num_written_bytes = 0; 216 int num_bytes_to_write = 0; 217 switch (attr_id){ 218 case AVRCP_MEDIA_ATTR_ALL: 219 case AVRCP_MEDIA_ATTR_NONE: 220 break; 221 case AVRCP_MEDIA_ATTR_TRACK: 222 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 223 if (num_free_bytes >= num_bytes_to_write){ 224 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->track_nr); 225 break; 226 } 227 fragmented = 1; 228 connection->attribute_value_offset = 0; 229 break; 230 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 231 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 232 if (num_free_bytes >= num_bytes_to_write){ 233 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->total_tracks); 234 break; 235 } 236 fragmented = 1; 237 connection->attribute_value_offset = 0; 238 break; 239 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 240 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 241 if (num_free_bytes >= num_bytes_to_write){ 242 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->song_length_ms); 243 break; 244 } 245 fragmented = 1; 246 connection->attribute_value_offset = 0; 247 break; 248 default:{ 249 uint8_t header = (connection->attribute_value_offset == 0); 250 uint8_t * attr_value = (uint8_t *) (connection->now_playing_info[attr_index].value + connection->attribute_value_offset); 251 uint16_t attr_value_len = connection->now_playing_info[attr_index].len - connection->attribute_value_offset; 252 253 num_bytes_to_write = attr_value_len + (header * AVRCP_ATTR_HEADER_LEN); 254 if (num_bytes_to_write <= num_free_bytes){ 255 connection->attribute_value_offset = 0; 256 num_written_bytes = num_bytes_to_write; 257 avrcp_target_pack_single_element_attribute_string(packet, pos, RFC2978_CHARSET_MIB_UTF8, attr_id, attr_value, attr_value_len, connection->now_playing_info[attr_index].len, header); 258 break; 259 } 260 fragmented = 1; 261 num_written_bytes = num_free_bytes; 262 attr_value_len = num_free_bytes - (header * AVRCP_ATTR_HEADER_LEN); 263 avrcp_target_pack_single_element_attribute_string(packet, pos, RFC2978_CHARSET_MIB_UTF8, attr_id, attr_value, attr_value_len, connection->now_playing_info[attr_index].len, header); 264 connection->attribute_value_offset += attr_value_len; 265 break; 266 } 267 } 268 pos += num_written_bytes; 269 num_free_bytes -= num_written_bytes; 270 } 271 if (!fragmented){ 272 // C++ compatible version of connection->next_attr_id++ 273 connection->next_attr_id = (avrcp_media_attribute_id_t) (((int) connection->next_attr_id) + 1); 274 } 275 } 276 277 if (fragmented){ 278 switch (connection->packet_type){ 279 case AVRCP_SINGLE_PACKET: 280 connection->packet_type = AVRCP_START_PACKET; 281 break; 282 default: 283 connection->packet_type = AVRCP_CONTINUE_PACKET; 284 break; 285 } 286 } else { 287 if (connection->next_attr_id >= AVRCP_MEDIA_ATTR_SONG_LENGTH_MS){ // DONE 288 if (connection->packet_type != AVRCP_SINGLE_PACKET){ 289 connection->packet_type = AVRCP_END_PACKET; 290 } 291 } 292 } 293 packet[pos_packet_type] = connection->packet_type; 294 // store attr value length 295 big_endian_store_16(packet, playing_info_buffer_len_position, pos - playing_info_buffer_len_position - 2); 296 return l2cap_send_prepared(cid, size); 297 } 298 299 300 301 static int avrcp_target_send_response(uint16_t cid, avrcp_connection_t * connection){ 302 int pos = 0; 303 l2cap_reserve_packet_buffer(); 304 uint8_t * packet = l2cap_get_outgoing_buffer(); 305 306 // transport header 307 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 308 309 // TODO: check for fragmentation 310 connection->packet_type = AVRCP_SINGLE_PACKET; 311 312 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 313 // Profile IDentifier (PID) 314 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 315 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 316 // command_type 317 packet[pos++] = connection->command_type; 318 // subunit_type | subunit ID 319 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 320 // opcode 321 packet[pos++] = (uint8_t)connection->command_opcode; 322 323 // if (connection->command_opcode == AVRCP_CMD_OPCODE_VENDOR_DEPENDENT){ 324 // // company id is 3 bytes long 325 // big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 326 // pos += 3; 327 // } 328 // operands 329 memcpy(packet+pos, connection->cmd_operands, connection->cmd_operands_length); 330 pos += connection->cmd_operands_length; 331 // printf(" pos to send %d\n", pos); 332 // printf_hexdump(packet, pos); 333 334 connection->wait_to_send = 0; 335 return l2cap_send_prepared(cid, pos); 336 } 337 338 static uint8_t avrcp_target_response_accept(avrcp_connection_t * connection, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, uint8_t status){ 339 // AVRCP_CTYPE_RESPONSE_REJECTED 340 connection->command_type = AVRCP_CTYPE_RESPONSE_ACCEPTED; 341 connection->subunit_type = subunit_type; 342 connection->subunit_id = subunit_id; 343 connection->command_opcode = opcode; 344 // company id is 3 bytes long 345 int pos = connection->cmd_operands_length; 346 connection->cmd_operands[pos++] = pdu_id; 347 connection->cmd_operands[pos++] = 0; 348 // param length 349 big_endian_store_16(connection->cmd_operands, pos, 1); 350 pos += 2; 351 connection->cmd_operands[pos++] = status; 352 connection->cmd_operands_length = pos; 353 connection->accept_response = 1; 354 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 355 return ERROR_CODE_SUCCESS; 356 } 357 358 static uint8_t avrcp_target_response_reject(avrcp_connection_t * connection, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, avrcp_status_code_t status){ 359 // AVRCP_CTYPE_RESPONSE_REJECTED 360 connection->command_type = AVRCP_CTYPE_RESPONSE_REJECTED; 361 connection->subunit_type = subunit_type; 362 connection->subunit_id = subunit_id; 363 connection->command_opcode = opcode; 364 // company id is 3 bytes long 365 int pos = connection->cmd_operands_length; 366 connection->cmd_operands[pos++] = pdu_id; 367 connection->cmd_operands[pos++] = 0; 368 // param length 369 big_endian_store_16(connection->cmd_operands, pos, 1); 370 pos += 2; 371 connection->cmd_operands[pos++] = status; 372 connection->cmd_operands_length = pos; 373 connection->state = AVCTP_W2_SEND_RESPONSE; 374 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 375 return ERROR_CODE_SUCCESS; 376 } 377 378 static uint8_t avrcp_target_response_not_implemented(avrcp_connection_t * connection, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, uint8_t event_id){ 379 connection->command_type = AVRCP_CTYPE_RESPONSE_NOT_IMPLEMENTED; 380 connection->subunit_type = subunit_type; 381 connection->subunit_id = subunit_id; 382 connection->command_opcode = opcode; 383 384 // company id is 3 bytes long 385 int pos = connection->cmd_operands_length; 386 connection->cmd_operands[pos++] = pdu_id; 387 connection->cmd_operands[pos++] = 0; 388 // param length 389 big_endian_store_16(connection->cmd_operands, pos, 1); 390 pos += 2; 391 connection->cmd_operands[pos++] = event_id; 392 connection->cmd_operands_length = pos; 393 394 connection->state = AVCTP_W2_SEND_RESPONSE; 395 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 396 return ERROR_CODE_SUCCESS; 397 } 398 399 static uint8_t avrcp_target_response_vendor_dependent_interim(avrcp_connection_t * connection, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 400 avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, uint8_t event_id, const uint8_t * value, uint16_t value_len){ 401 connection->command_type = AVRCP_CTYPE_RESPONSE_INTERIM; 402 connection->subunit_type = subunit_type; 403 connection->subunit_id = subunit_id; 404 connection->command_opcode = opcode; 405 406 // company id is 3 bytes long 407 int pos = connection->cmd_operands_length; 408 connection->cmd_operands[pos++] = pdu_id; 409 connection->cmd_operands[pos++] = 0; 410 // param length 411 big_endian_store_16(connection->cmd_operands, pos, 1 + value_len); 412 pos += 2; 413 connection->cmd_operands[pos++] = event_id; 414 if (value && (value_len > 0)){ 415 memcpy(connection->cmd_operands + pos, value, value_len); 416 pos += value_len; 417 } 418 connection->cmd_operands_length = pos; 419 connection->state = AVCTP_W2_SEND_RESPONSE; 420 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 421 return ERROR_CODE_SUCCESS; 422 } 423 424 static uint8_t avrcp_target_response_addressed_player_changed_interim(avrcp_connection_t * connection, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id){ 425 connection->command_type = AVRCP_CTYPE_RESPONSE_INTERIM; 426 connection->subunit_type = subunit_type; 427 connection->subunit_id = subunit_id; 428 connection->command_opcode = opcode; 429 430 // company id is 3 bytes long 431 int pos = connection->cmd_operands_length; 432 connection->cmd_operands[pos++] = pdu_id; 433 connection->cmd_operands[pos++] = 0; 434 // param length 435 big_endian_store_16(connection->cmd_operands, pos, 5); 436 pos += 2; 437 connection->cmd_operands[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 438 big_endian_read_16( &connection->cmd_operands[pos], connection->addressed_player_id); 439 pos += 2; 440 big_endian_read_16( &connection->cmd_operands[pos], connection->uid_counter); 441 pos += 2; 442 443 connection->cmd_operands_length = pos; 444 connection->state = AVCTP_W2_SEND_RESPONSE; 445 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 446 return ERROR_CODE_SUCCESS; 447 } 448 449 450 // static uint8_t avrcp_target_response_vendor_dependent_changed(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id, uint8_t event_id){ 451 // connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 452 // connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 453 // connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 454 // connection->subunit_id = AVRCP_SUBUNIT_ID; 455 456 // // company id is 3 bytes long 457 // int pos = connection->cmd_operands_length; 458 // connection->cmd_operands[pos++] = pdu_id; 459 // connection->cmd_operands[pos++] = 0; 460 // // param length 461 // big_endian_store_16(connection->cmd_operands, pos, 1); 462 // pos += 2; 463 // connection->cmd_operands[pos++] = event_id; 464 // connection->cmd_operands_length = pos; 465 466 // connection->state = AVCTP_W2_SEND_RESPONSE; 467 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 468 // return ERROR_CODE_SUCCESS; 469 // } 470 471 static uint8_t avrcp_target_pass_through_response(uint16_t avrcp_cid, avrcp_command_type_t cmd_type, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 472 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 473 if (!connection){ 474 log_error("Could not find a connection."); 475 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 476 } 477 connection->command_type = cmd_type; 478 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 479 connection->subunit_id = AVRCP_SUBUNIT_ID; 480 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 481 482 int pos = 0; 483 connection->cmd_operands[pos++] = opid; 484 connection->cmd_operands[pos++] = operands_length; 485 if (operands_length == 1){ 486 connection->cmd_operands[pos++] = operand; 487 } 488 connection->cmd_operands_length = pos; 489 490 connection->state = AVCTP_W2_SEND_RESPONSE; 491 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 492 return ERROR_CODE_SUCCESS; 493 } 494 495 uint8_t avrcp_target_operation_rejected(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 496 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_REJECTED, opid, operands_length, operand); 497 } 498 499 uint8_t avrcp_target_operation_accepted(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 500 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 501 } 502 503 uint8_t avrcp_target_operation_not_implemented(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 504 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 505 } 506 507 void avrcp_target_set_unit_info(uint16_t avrcp_cid, avrcp_subunit_type_t unit_type, uint32_t company_id){ 508 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 509 if (!connection){ 510 log_error("avrcp_target_operation_reject: could not find a connection."); 511 return; 512 } 513 connection->unit_type = unit_type; 514 connection->company_id = company_id; 515 } 516 517 void avrcp_target_set_subunit_info(uint16_t avrcp_cid, avrcp_subunit_type_t subunit_type, const uint8_t * subunit_info_data, uint16_t subunit_info_data_size){ 518 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 519 if (!connection){ 520 log_error("avrcp_target_operation_reject: could not find a connection."); 521 return; 522 } 523 connection->subunit_info_type = subunit_type; 524 connection->subunit_info_data = subunit_info_data; 525 connection->subunit_info_data_size = subunit_info_data_size; 526 } 527 528 static uint8_t avrcp_target_unit_info(avrcp_connection_t * connection){ 529 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 530 531 uint8_t unit = 0; 532 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 533 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 534 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 535 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 536 537 connection->cmd_operands_length = 5; 538 connection->cmd_operands[0] = 0x07; 539 connection->cmd_operands[1] = (connection->unit_type << 4) | unit; 540 // company id is 3 bytes long 541 big_endian_store_32(connection->cmd_operands, 2, connection->company_id); 542 543 connection->state = AVCTP_W2_SEND_RESPONSE; 544 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 545 return ERROR_CODE_SUCCESS; 546 } 547 548 549 static uint8_t avrcp_target_subunit_info(avrcp_connection_t * connection, uint8_t offset){ 550 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 551 if ((offset - 4) > connection->subunit_info_data_size) return AVRCP_STATUS_INVALID_PARAMETER; 552 553 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 554 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 555 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 556 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 557 // printf("avrcp_target_subunit_info subunit_type %d\n", connection->subunit_type); 558 559 uint8_t page = offset / 4; 560 uint8_t extension_code = 7; 561 connection->cmd_operands_length = 5; 562 connection->cmd_operands[0] = (page << 4) | extension_code; 563 564 memcpy(connection->cmd_operands+1, connection->subunit_info_data + offset, 4); 565 566 connection->state = AVCTP_W2_SEND_RESPONSE; 567 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 568 return ERROR_CODE_SUCCESS; 569 } 570 571 static inline uint8_t avrcp_prepare_vendor_dependent_response(uint16_t avrcp_cid, avrcp_connection_t ** out_connection, avrcp_pdu_id_t pdu_id, uint16_t param_length){ 572 *out_connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 573 if (!*out_connection){ 574 log_error("avrcp tartget: could not find a connection."); 575 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 576 } 577 578 if ((*out_connection)->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 579 (*out_connection)->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 580 (*out_connection)->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 581 (*out_connection)->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 582 (*out_connection)->subunit_id = AVRCP_SUBUNIT_ID; 583 584 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = pdu_id; 585 // reserved 586 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = 0; 587 // param length 588 big_endian_store_16((*out_connection)->cmd_operands, (*out_connection)->cmd_operands_length, param_length); 589 (*out_connection)->cmd_operands_length += 2; 590 return ERROR_CODE_SUCCESS; 591 } 592 593 static uint8_t avrcp_target_capability(uint16_t avrcp_cid, avrcp_capability_id_t capability_id, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size){ 594 avrcp_connection_t * connection = NULL; 595 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_CAPABILITIES, 2+size); 596 if (status != ERROR_CODE_SUCCESS) return status; 597 598 connection->cmd_operands[connection->cmd_operands_length++] = capability_id; 599 connection->cmd_operands[connection->cmd_operands_length++] = capabilities_num; 600 memcpy(connection->cmd_operands+connection->cmd_operands_length, capabilities, size); 601 connection->cmd_operands_length += size; 602 603 connection->state = AVCTP_W2_SEND_RESPONSE; 604 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 605 return ERROR_CODE_SUCCESS; 606 } 607 608 uint8_t avrcp_target_supported_events(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size){ 609 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_EVENT, capabilities_num, capabilities, size); 610 } 611 612 uint8_t avrcp_target_supported_companies(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size ){ 613 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_COMPANY, capabilities_num, capabilities, size); 614 } 615 616 uint8_t avrcp_target_play_status(uint16_t avrcp_cid, uint32_t song_length_ms, uint32_t song_position_ms, avrcp_playback_status_t play_status){ 617 avrcp_connection_t * connection = NULL; 618 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_PLAY_STATUS, 11); 619 if (status != ERROR_CODE_SUCCESS) return status; 620 621 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_length_ms); 622 connection->cmd_operands_length += 4; 623 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_position_ms); 624 connection->cmd_operands_length += 4; 625 connection->cmd_operands[connection->cmd_operands_length++] = play_status; 626 627 connection->state = AVCTP_W2_SEND_RESPONSE; 628 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 629 return ERROR_CODE_SUCCESS; 630 } 631 632 static uint8_t avrcp_target_now_playing_info(avrcp_connection_t * connection){ 633 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 634 connection->now_playing_info_response = 1; 635 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 636 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 637 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 638 connection->subunit_id = AVRCP_SUBUNIT_ID; 639 640 connection->state = AVCTP_W2_SEND_RESPONSE; 641 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 642 return ERROR_CODE_SUCCESS; 643 } 644 645 static uint8_t avrcp_target_store_media_attr(avrcp_connection_t * connection, avrcp_media_attribute_id_t attr_id, const char * value){ 646 int index = attr_id - 1; 647 if (!value) return AVRCP_STATUS_INVALID_PARAMETER; 648 connection->now_playing_info[index].value = (uint8_t*)value; 649 connection->now_playing_info[index].len = strlen(value); 650 // printf("store %lu bytes, %s\n", strlen(value), value); 651 return ERROR_CODE_SUCCESS; 652 } 653 654 uint8_t avrcp_target_set_playback_status(uint16_t avrcp_cid, avrcp_playback_status_t playback_status){ 655 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 656 if (!connection){ 657 log_error("avrcp_unit_info: could not find a connection."); 658 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 659 } 660 if (connection->playback_status == playback_status) return ERROR_CODE_SUCCESS; 661 662 connection->playback_status = playback_status; 663 connection->playback_status_changed = 1; 664 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 665 return ERROR_CODE_SUCCESS; 666 } 667 668 void avrcp_target_set_now_playing_info(uint16_t avrcp_cid, const avrcp_track_t * current_track, uint16_t total_tracks){ 669 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 670 if (!connection){ 671 log_error("avrcp_unit_info: could not find a connection. cid 0x%02x\n", avrcp_cid); 672 return; 673 } 674 if (!current_track){ 675 connection->track_selected = 0; 676 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 677 return; 678 } 679 memcpy(connection->track_id, current_track->track_id, 8); 680 connection->song_length_ms = current_track->song_length_ms; 681 connection->track_nr = current_track->track_nr; 682 connection->total_tracks = total_tracks; 683 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_TITLE, current_track->title); 684 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ARTIST, current_track->artist); 685 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ALBUM, current_track->album); 686 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_GENRE, current_track->genre); 687 connection->track_selected = 1; 688 689 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 690 connection->track_changed = 1; 691 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 692 } 693 return; 694 } 695 696 uint8_t avrcp_target_track_changed(uint16_t avrcp_cid, uint8_t * track_id){ 697 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 698 if (!connection){ 699 log_error("avrcp_target_track_changed: could not find connection."); 700 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 701 } 702 if (!track_id) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 703 704 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 705 connection->track_changed = 1; 706 memcpy(connection->track_id, track_id, 8); 707 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 708 } 709 return ERROR_CODE_SUCCESS; 710 } 711 712 uint8_t avrcp_target_playing_content_changed(uint16_t avrcp_cid){ 713 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 714 if (!connection){ 715 log_error("avrcp_target_playing_content_changed: could not find a connection."); 716 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 717 } 718 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED)) { 719 connection->playing_content_changed = 1; 720 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 721 } 722 return ERROR_CODE_SUCCESS; 723 } 724 725 uint8_t avrcp_target_addressed_player_changed(uint16_t avrcp_cid, uint16_t player_id, uint16_t uid_counter){ 726 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 727 if (!connection){ 728 log_error("avrcp_unit_info: could not find a connection."); 729 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 730 } 731 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED)) { 732 // printf("send AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED\n"); 733 // connection->addressed_player_changed = 1; 734 connection->uid_counter = uid_counter; 735 connection->addressed_player_id = player_id; 736 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 737 } 738 return ERROR_CODE_SUCCESS; 739 } 740 741 uint8_t avrcp_target_battery_status_changed(uint16_t avrcp_cid, avrcp_battery_status_t battery_status){ 742 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 743 if (!connection){ 744 log_error("avrcp_unit_info: could not find a connection."); 745 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 746 } 747 if (connection->battery_status == battery_status) return ERROR_CODE_SUCCESS; 748 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED)) { 749 connection->battery_status = battery_status; 750 connection->battery_status_changed = 1; 751 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 752 } 753 return ERROR_CODE_SUCCESS; 754 } 755 756 uint8_t avrcp_target_volume_changed(uint16_t avrcp_cid, uint8_t volume_percentage){ 757 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 758 if (!connection){ 759 log_error("avrcp_unit_info: could not find a connection."); 760 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 761 } 762 // if (connection->volume_percentage == volume_percentage) return ERROR_CODE_SUCCESS; 763 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED )) { 764 connection->volume_percentage = volume_percentage; 765 connection->notify_volume_percentage_changed = 1; 766 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 767 } 768 return ERROR_CODE_SUCCESS; 769 } 770 771 static void avrcp_target_set_transaction_label_for_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification, uint8_t transaction_label){ 772 if (notification > AVRCP_NOTIFICATION_EVENT_MAX_VALUE) return; 773 connection->notifications_transaction_label[notification] = transaction_label; 774 } 775 776 static uint8_t avrcp_target_get_transaction_label_for_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification){ 777 if (notification > AVRCP_NOTIFICATION_EVENT_MAX_VALUE) return 0; 778 return connection->notifications_transaction_label[notification]; 779 } 780 781 static uint8_t * avrcp_get_company_id(uint8_t *packet, uint16_t size){ 782 UNUSED(size); 783 return packet + 6; 784 } 785 786 static uint8_t * avrcp_get_pdu(uint8_t *packet, uint16_t size){ 787 UNUSED(size); 788 return packet + 9; 789 } 790 791 static uint8_t avrcp_is_receive_pass_through_cmd(uint8_t operation_id){ 792 return operation_id & 0x80; 793 } 794 795 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 796 UNUSED(connection); 797 UNUSED(packet); 798 UNUSED(size); 799 800 // uint8_t opcode; 801 uint16_t pid = 0; 802 uint8_t transport_header = packet[0]; 803 connection->transaction_label = transport_header >> 4; 804 // uint8_t frame_type = (transport_header & 0x03) >> 1; 805 avrcp_packet_type_t packet_type = (avrcp_packet_type_t) ((transport_header & 0x0F) >> 2); 806 switch (packet_type){ 807 case AVRCP_SINGLE_PACKET: 808 pid = big_endian_read_16(packet, 1); 809 break; 810 case AVRCP_START_PACKET: 811 pid = big_endian_read_16(packet, 2); 812 break; 813 default: 814 break; 815 } 816 817 switch (packet_type){ 818 case AVRCP_SINGLE_PACKET: 819 case AVRCP_START_PACKET: 820 if (pid != BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL){ 821 log_info("Invalid pid 0x%02x, expected 0x%02x", connection->invalid_pid, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 822 connection->reject_transport_header = 1; 823 connection->invalid_pid = pid; 824 connection->transport_header = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2 ) | (AVRCP_RESPONSE_FRAME << 1) | 1; 825 connection->state = AVCTP_W2_SEND_RESPONSE; 826 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 827 return; 828 } 829 break; 830 default: 831 break; 832 } 833 834 // avrcp_command_type_t ctype = (avrcp_command_type_t) packet[3]; 835 // uint8_t byte_value = packet[4]; 836 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (packet[4] >> 3); 837 avrcp_subunit_id_t subunit_id = (avrcp_subunit_id_t) (packet[4] & 0x07); 838 // opcode = packet[pos++]; 839 // printf(" Transport header 0x%02x (transaction_label %d, packet_type %d, frame_type %d, ipid %d), pid 0x%4x\n", 840 // transport_header, transaction_label, packet_type, frame_type, ipid, pid); 841 // printf_hexdump(packet+pos, size-pos); 842 843 avrcp_command_opcode_t opcode = (avrcp_command_opcode_t) avrcp_cmd_opcode(packet,size); 844 uint8_t * company_id = avrcp_get_company_id(packet, size); 845 uint8_t * pdu = avrcp_get_pdu(packet, size); 846 // uint16_t param_length = big_endian_read_16(pdu, 2); 847 848 int pos = 4; 849 uint16_t length; 850 avrcp_pdu_id_t pdu_id; 851 connection->cmd_operands_length = 0; 852 853 switch (opcode){ 854 case AVRCP_CMD_OPCODE_UNIT_INFO: 855 avrcp_target_unit_info(connection); 856 break; 857 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 858 uint8_t offset = 4 * (packet[pos+2]>>4); 859 avrcp_target_subunit_info(connection, offset); 860 break; 861 } 862 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 863 log_info("AVRCP_OPERATION_ID 0x%02x, operands length %d, operand %d", packet[6], packet[7], packet[8]); 864 avrcp_operation_id_t operation_id = (avrcp_operation_id_t) packet[6]; 865 866 if (avrcp_is_receive_pass_through_cmd(operation_id)){ 867 operation_id = (avrcp_operation_id_t) (packet[6] & 0x7F); 868 avrcp_target_operation_accepted(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 869 break; 870 } 871 872 switch (operation_id){ 873 case AVRCP_OPERATION_ID_PLAY: 874 case AVRCP_OPERATION_ID_PAUSE: 875 case AVRCP_OPERATION_ID_STOP: 876 case AVRCP_OPERATION_ID_VOLUME_UP: 877 case AVRCP_OPERATION_ID_VOLUME_DOWN: 878 case AVRCP_OPERATION_ID_REWIND: 879 case AVRCP_OPERATION_ID_FAST_FORWARD: 880 case AVRCP_OPERATION_ID_FORWARD: 881 case AVRCP_OPERATION_ID_BACKWARD: 882 case AVRCP_OPERATION_ID_SKIP: 883 case AVRCP_OPERATION_ID_MUTE: 884 case AVRCP_OPERATION_ID_CHANNEL_UP: 885 case AVRCP_OPERATION_ID_CHANNEL_DOWN: 886 case AVRCP_OPERATION_ID_SELECT: 887 case AVRCP_OPERATION_ID_UP: 888 case AVRCP_OPERATION_ID_DOWN: 889 case AVRCP_OPERATION_ID_LEFT: 890 case AVRCP_OPERATION_ID_RIGHT: 891 case AVRCP_OPERATION_ID_ROOT_MENU: 892 avrcp_target_operation_accepted(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 893 avrcp_target_emit_operation(avrcp_target_context.avrcp_callback, connection->avrcp_cid, operation_id, packet[7], packet[8]); 894 break; 895 case AVRCP_OPERATION_ID_UNDEFINED: 896 avrcp_target_operation_not_implemented(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 897 return; 898 default: 899 avrcp_target_operation_not_implemented(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 900 return; 901 } 902 break; 903 } 904 905 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 906 pdu_id = (avrcp_pdu_id_t) pdu[0]; 907 // 1 - reserved 908 // 2-3 param length, 909 length = big_endian_read_16(pdu, 2); 910 memcpy(connection->cmd_operands, company_id, 3); 911 connection->cmd_operands_length = 3; 912 switch (pdu_id){ 913 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER:{ 914 if (length == 0){ 915 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PLAYER_ID); 916 break; 917 } 918 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_SUCCESS); 919 break; 920 } 921 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 922 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) pdu[pos]; 923 switch (capability_id){ 924 case AVRCP_CAPABILITY_ID_EVENT: 925 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_EVENT_IDS_QUERY); 926 break; 927 case AVRCP_CAPABILITY_ID_COMPANY: 928 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_COMPANY_IDS_QUERY); 929 break; 930 default: 931 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 932 break; 933 } 934 break; 935 } 936 case AVRCP_PDU_ID_GET_PLAY_STATUS: 937 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_PLAY_STATUS_QUERY); 938 break; 939 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 940 connection->cmd_operands[0] = pdu[4]; 941 connection->abort_continue_response = 1; 942 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 943 break; 944 case AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE: 945 if (pdu[4] != AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES){ 946 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 947 return; 948 } 949 connection->now_playing_info_response = 1; 950 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 951 break; 952 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 953 uint8_t play_identifier[8]; 954 memset(play_identifier, 0, 8); 955 if (memcmp(pdu+pos, play_identifier, 8) != 0) { 956 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 957 return; 958 } 959 pos += 8; 960 uint8_t attribute_count = pdu[pos++]; 961 // printf("AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES attribute count %d\n", attribute_count); 962 connection->next_attr_id = AVRCP_MEDIA_ATTR_NONE; 963 if (!attribute_count){ 964 connection->now_playing_info_attr_bitmap = 0xFE; 965 } else { 966 int i; 967 connection->now_playing_info_attr_bitmap = 0; 968 for (i=0; i < attribute_count; i++){ 969 uint16_t attr_id = big_endian_read_16(pdu, pos); 970 pos += 2; 971 connection->now_playing_info_attr_bitmap |= (1 << attr_id); 972 } 973 } 974 log_info("now_playing_info_attr_bitmap 0x%02x", connection->now_playing_info_attr_bitmap); 975 avrcp_target_now_playing_info(connection); 976 break; 977 } 978 case AVRCP_PDU_ID_REGISTER_NOTIFICATION:{ 979 // 0 - pdu id 980 // 1 - reserved 981 // 2-3 param length 982 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) pdu[4]; 983 uint16_t event_mask = (1 << event_id); 984 avrcp_target_set_transaction_label_for_notification(connection, event_id, connection->transaction_label); 985 986 switch (event_id){ 987 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED: 988 connection->notifications_enabled |= event_mask; 989 if (connection->track_selected){ 990 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_SELECTED, 8); 991 } else { 992 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_NOT_SELECTED, 8); 993 } 994 break; 995 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED: 996 connection->notifications_enabled |= event_mask; 997 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->playback_status, 1); 998 break; 999 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED: 1000 connection->notifications_enabled |= event_mask; 1001 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, NULL, 0); 1002 break; 1003 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED: 1004 connection->notify_volume_percentage_changed = 0; 1005 connection->notifications_enabled |= event_mask; 1006 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->volume_percentage, 1); 1007 break; 1008 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED: 1009 connection->notifications_enabled |= event_mask; 1010 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->battery_status, 1); 1011 break; 1012 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED: 1013 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 1014 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED: 1015 avrcp_target_response_not_implemented(connection, subunit_type, subunit_id, opcode, pdu_id, event_id); 1016 return; 1017 case AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED: 1018 connection->notifications_enabled |= event_mask; 1019 avrcp_target_response_addressed_player_changed_interim(connection, subunit_type, subunit_id, opcode, pdu_id); 1020 return; 1021 default: 1022 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 1023 return; 1024 } 1025 break; 1026 } 1027 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME: { 1028 if (length != 1){ 1029 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 1030 break; 1031 } 1032 1033 uint8_t absolute_volume = pdu[4]; 1034 if (absolute_volume < 0x80){ 1035 connection->volume_percentage = absolute_volume; 1036 } 1037 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, connection->volume_percentage); 1038 avrcp_target_emit_volume_changed(avrcp_target_context.avrcp_callback, connection->avrcp_cid, connection->volume_percentage); 1039 // avrcp_target_volume_changed(connection->avrcp_cid, connection->volume_percentage); 1040 break; 1041 } 1042 default: 1043 log_info("AVRCP target: unhandled pdu id 0x%02x", pdu_id); 1044 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 1045 break; 1046 } 1047 break; 1048 default: 1049 log_info("AVRCP target: opcode 0x%02x not implemented", avrcp_cmd_opcode(packet,size)); 1050 break; 1051 } 1052 } 1053 1054 #if 0 1055 static int avrcp_target_send_addressed_player_changed_notification(uint16_t cid, avrcp_connection_t * connection, uint16_t uid, uint16_t uid_counter){ 1056 if (!connection){ 1057 log_error("avrcp tartget: could not find a connection."); 1058 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1059 } 1060 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1061 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 1062 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1063 connection->subunit_id = AVRCP_SUBUNIT_ID; 1064 1065 uint16_t pos = 0; 1066 l2cap_reserve_packet_buffer(); 1067 uint8_t * packet = l2cap_get_outgoing_buffer(); 1068 1069 connection->packet_type = AVRCP_SINGLE_PACKET; 1070 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1071 // Profile IDentifier (PID) 1072 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1073 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1074 1075 // command_type 1076 packet[pos++] = connection->command_type; 1077 // subunit_type | subunit ID 1078 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1079 // opcode 1080 packet[pos++] = (uint8_t)connection->command_opcode; 1081 1082 // company id is 3 bytes long 1083 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1084 pos += 3; 1085 1086 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1087 packet[pos++] = 0; 1088 big_endian_store_16(packet, pos, 5); 1089 pos += 2; 1090 packet[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 1091 big_endian_store_16(packet, pos, uid); 1092 pos += 2; 1093 big_endian_store_16(packet, pos, uid_counter); 1094 pos += 2; 1095 1096 connection->wait_to_send = 0; 1097 return l2cap_send_prepared(cid, pos); 1098 } 1099 #endif 1100 1101 static int avrcp_target_send_notification(uint16_t cid, avrcp_connection_t * connection, avrcp_notification_event_id_t notification_id, uint8_t * value, uint16_t value_len){ 1102 if (!connection){ 1103 log_error("avrcp tartget: could not find a connection."); 1104 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1105 } 1106 1107 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1108 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 1109 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1110 connection->subunit_id = AVRCP_SUBUNIT_ID; 1111 connection->transaction_label = avrcp_target_get_transaction_label_for_notification(connection, notification_id); 1112 1113 uint16_t pos = 0; 1114 l2cap_reserve_packet_buffer(); 1115 uint8_t * packet = l2cap_get_outgoing_buffer(); 1116 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 1117 1118 connection->packet_type = AVRCP_SINGLE_PACKET; 1119 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1120 // Profile IDentifier (PID) 1121 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1122 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1123 1124 // command_type 1125 packet[pos++] = connection->command_type; 1126 // subunit_type | subunit ID 1127 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1128 // opcode 1129 packet[pos++] = (uint8_t)connection->command_opcode; 1130 1131 // company id is 3 bytes long 1132 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1133 pos += 3; 1134 1135 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1136 packet[pos++] = 0; 1137 uint16_t remainig_outgoing_buffer_size = size - pos - 2; 1138 1139 uint16_t caped_value_len = btstack_min(value_len + 1, remainig_outgoing_buffer_size); 1140 big_endian_store_16(packet, pos, caped_value_len); 1141 pos += 2; 1142 packet[pos++] = notification_id; 1143 memcpy(packet+pos, value, caped_value_len-1); 1144 pos += caped_value_len - 1; 1145 connection->wait_to_send = 0; 1146 return l2cap_send_prepared(cid, pos); 1147 } 1148 1149 static void avrcp_target_reset_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification_id){ 1150 if (!connection){ 1151 log_error("avrcp tartget: could not find a connection."); 1152 return; 1153 } 1154 connection->notifications_enabled &= ~(1 << notification_id); 1155 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1156 avrcp_target_set_transaction_label_for_notification(connection, notification_id, 0); 1157 } 1158 1159 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1160 avrcp_connection_t * connection; 1161 switch (packet_type) { 1162 case L2CAP_DATA_PACKET: 1163 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, channel); 1164 if (!connection) break; 1165 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1166 break; 1167 case HCI_EVENT_PACKET: 1168 switch (hci_event_packet_get_type(packet)){ 1169 case HCI_EVENT_AVRCP_META: 1170 // forward to app 1171 (*avrcp_target_context.avrcp_callback)(packet_type, channel, packet, size); 1172 break; 1173 case L2CAP_EVENT_CAN_SEND_NOW:{ 1174 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, channel); 1175 if (!connection) { 1176 log_error("Connection not found\n"); 1177 break; 1178 } 1179 1180 if (connection->accept_response){ 1181 connection->accept_response = 0; 1182 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1183 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1184 break; 1185 } 1186 if (connection->abort_continue_response){ 1187 connection->abort_continue_response = 0; 1188 connection->now_playing_info_response = 0; 1189 avrcp_target_abort_continue_response(connection->l2cap_signaling_cid, connection); 1190 break; 1191 } 1192 1193 if (connection->now_playing_info_response){ 1194 connection->now_playing_info_response = 0; 1195 avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1196 break; 1197 } 1198 1199 if (connection->track_changed){ 1200 connection->track_changed = 0; 1201 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, connection->track_id, 8); 1202 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1203 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1204 break; 1205 } 1206 1207 if (connection->playback_status_changed){ 1208 connection->playback_status_changed = 0; 1209 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, &connection->playback_status_changed, 1); 1210 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 1211 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1212 break; 1213 } 1214 1215 // if (connection->addressed_player_changed){ 1216 // connection->playback_status_changed = 0; 1217 // avrcp_target_send_addressed_player_changed_notification(connection->l2cap_signaling_cid, connection, connection->addressed_player_id, connection->uid_counter); 1218 // avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED); 1219 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1220 // break; 1221 // } 1222 1223 if (connection->playing_content_changed){ 1224 connection->playing_content_changed = 0; 1225 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED, NULL, 0); 1226 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 1227 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1228 break; 1229 } 1230 1231 if (connection->battery_status_changed){ 1232 connection->battery_status_changed = 0; 1233 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED, (uint8_t *)&connection->battery_status, 1); 1234 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 1235 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1236 break; 1237 } 1238 1239 if (connection->notify_volume_percentage_changed){ 1240 // printf("emit new volume %d\n", connection->volume_percentage); 1241 connection->notify_volume_percentage_changed = 0; 1242 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED, &connection->volume_percentage, 1); 1243 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 1244 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1245 break; 1246 } 1247 1248 if (connection->reject_transport_header){ 1249 connection->state = AVCTP_CONNECTION_OPENED; 1250 connection->reject_transport_header = 0; 1251 l2cap_reserve_packet_buffer(); 1252 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 1253 out_buffer[0] = connection->transport_header; 1254 big_endian_store_16(out_buffer, 1, connection->invalid_pid); 1255 l2cap_send_prepared(connection->l2cap_signaling_cid, 3); 1256 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1257 break; 1258 } 1259 1260 switch (connection->state){ 1261 case AVCTP_W2_SEND_RESPONSE: 1262 connection->state = AVCTP_CONNECTION_OPENED; 1263 // if (connection->now_playing_info_response){ 1264 // connection->now_playing_info_response = 0; 1265 // avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1266 // break; 1267 // } 1268 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1269 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1270 return; 1271 default: 1272 break; 1273 } 1274 1275 break; 1276 } 1277 default: 1278 break; 1279 } 1280 default: 1281 break; 1282 } 1283 } 1284 1285 void avrcp_target_init(void){ 1286 avrcp_init(); 1287 avrcp_target_context.role = AVRCP_TARGET; 1288 avrcp_target_context.packet_handler = avrcp_target_packet_handler; 1289 avrcp_register_target_packet_handler(&avrcp_target_packet_handler); 1290 } 1291 1292 void avrcp_target_register_packet_handler(btstack_packet_handler_t callback){ 1293 if (callback == NULL){ 1294 log_error("avrcp_register_packet_handler called with NULL callback"); 1295 return; 1296 } 1297 avrcp_target_context.avrcp_callback = callback; 1298 } 1299 1300 uint8_t avrcp_target_connect(bd_addr_t bd_addr, uint16_t * avrcp_cid){ 1301 return avrcp_connect(AVRCP_TARGET, bd_addr, &avrcp_target_context, avrcp_cid); 1302 } 1303 1304 uint8_t avrcp_target_disconnect(uint16_t avrcp_cid){ 1305 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 1306 if (!connection){ 1307 log_error("avrcp_target_disconnect: could not find a connection."); 1308 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1309 } 1310 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1311 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1312 return ERROR_CODE_SUCCESS; 1313 } 1314 1315