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 void avrcp_target_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 57 avrcp_create_sdp_record(0, service, service_record_handle, browsing, supported_features, service_name, service_provider_name); 58 } 59 60 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){ 61 if (!callback) return; 62 uint8_t event[8]; 63 int pos = 0; 64 event[pos++] = HCI_EVENT_AVRCP_META; 65 event[pos++] = sizeof(event) - 2; 66 event[pos++] = AVRCP_SUBEVENT_OPERATION; 67 little_endian_store_16(event, pos, avrcp_cid); 68 pos += 2; 69 event[pos++] = operation_id; 70 event[pos++] = operands_length; 71 event[pos++] = operand; 72 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 73 } 74 75 static void avrcp_target_emit_respond_vendor_dependent_query(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t subevent_id){ 76 if (!callback) return; 77 uint8_t event[5]; 78 int pos = 0; 79 event[pos++] = HCI_EVENT_AVRCP_META; 80 event[pos++] = sizeof(event) - 2; 81 event[pos++] = subevent_id; 82 little_endian_store_16(event, pos, avrcp_cid); 83 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 84 } 85 86 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){ 87 if ((attr_id < 1) || (attr_id > AVRCP_MEDIA_ATTR_COUNT)) return 0; 88 uint16_t attr_value_length = sprintf((char *)(packet+pos+8), "%0" PRIu32, value); 89 big_endian_store_32(packet, pos, attr_id); 90 pos += 4; 91 big_endian_store_16(packet, pos, RFC2978_CHARSET_MIB_UTF8); 92 pos += 2; 93 big_endian_store_16(packet, pos, attr_value_length); 94 pos += 2; 95 return 8 + attr_value_length; 96 } 97 98 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){ 99 if (attr_value_size == 0) return 0; 100 if ((attr_id < 1) || (attr_id > AVRCP_MEDIA_ATTR_COUNT)) return 0; 101 if (header){ 102 big_endian_store_32(packet, pos, attr_id); 103 pos += 4; 104 big_endian_store_16(packet, pos, mib_enumid); 105 pos += 2; 106 big_endian_store_16(packet, pos, attr_value_size); 107 pos += 2; 108 } 109 memcpy(packet+pos, attr_value, attr_value_to_copy); 110 pos += attr_value_size; 111 return header * 8 + attr_value_size; 112 } 113 114 static int avrcp_target_abort_continue_response(uint16_t cid, avrcp_connection_t * connection){ 115 uint16_t pos = 0; 116 l2cap_reserve_packet_buffer(); 117 uint8_t * packet = l2cap_get_outgoing_buffer(); 118 119 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 120 connection->command_type = AVRCP_CTYPE_RESPONSE_ACCEPTED; 121 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 122 connection->subunit_id = AVRCP_SUBUNIT_ID; 123 124 packet[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 125 // Profile IDentifier (PID) 126 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 127 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 128 129 // command_type 130 packet[pos++] = connection->command_type; 131 // subunit_type | subunit ID 132 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 133 // opcode 134 packet[pos++] = (uint8_t)connection->command_opcode; 135 136 // company id is 3 bytes long 137 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 138 pos += 3; 139 140 packet[pos++] = AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE; 141 142 // reserve byte for packet type 143 packet[pos++] = AVRCP_SINGLE_PACKET; 144 big_endian_store_16(packet, pos, 0); 145 pos += 2; 146 return l2cap_send_prepared(cid, pos); 147 } 148 149 static int avrcp_target_send_now_playing_info(uint16_t cid, avrcp_connection_t * connection){ 150 uint16_t pos = 0; 151 l2cap_reserve_packet_buffer(); 152 uint8_t * packet = l2cap_get_outgoing_buffer(); 153 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 154 155 packet[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 156 // Profile IDentifier (PID) 157 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 158 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 159 160 // command_type 161 packet[pos++] = connection->command_type; 162 // subunit_type | subunit ID 163 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 164 // opcode 165 packet[pos++] = (uint8_t)connection->command_opcode; 166 167 // company id is 3 bytes long 168 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 169 pos += 3; 170 171 packet[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 172 173 // reserve byte for packet type 174 uint8_t pos_packet_type = pos; 175 pos++; 176 177 uint16_t playing_info_buffer_len_position = pos; 178 pos += 2; 179 // printf("connection->next_attr_id %d \n", connection->next_attr_id); 180 if (connection->next_attr_id == AVRCP_MEDIA_ATTR_NONE){ 181 packet[pos_packet_type] = AVRCP_SINGLE_PACKET; 182 connection->packet_type = AVRCP_SINGLE_PACKET; 183 packet[pos++] = count_set_bits_uint32(connection->now_playing_info_attr_bitmap); 184 connection->next_attr_id++; 185 } 186 // printf("updated connection->next_attr_id %d, connection->attribute_value_offset %d \n", connection->next_attr_id, connection->attribute_value_offset); 187 188 uint8_t fragmented = 0; 189 int num_free_bytes = size - pos - 2; 190 uint8_t MAX_NUMBER_ATTR_LEN = 10; 191 192 while (!fragmented && num_free_bytes > 0 && connection->next_attr_id <= AVRCP_MEDIA_ATTR_SONG_LENGTH_MS){ 193 avrcp_media_attribute_id_t attr_id = connection->next_attr_id; 194 int attr_index = attr_id - 1; 195 196 if (connection->now_playing_info_attr_bitmap & (1 << attr_id)){ 197 int num_written_bytes = 0; 198 int num_bytes_to_write = 0; 199 switch (attr_id){ 200 case AVRCP_MEDIA_ATTR_ALL: 201 case AVRCP_MEDIA_ATTR_NONE: 202 break; 203 case AVRCP_MEDIA_ATTR_TRACK: 204 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 205 if (num_free_bytes >= num_bytes_to_write){ 206 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->track_nr); 207 break; 208 } 209 fragmented = 1; 210 connection->attribute_value_offset = 0; 211 break; 212 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 213 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 214 if (num_free_bytes >= num_bytes_to_write){ 215 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->total_tracks); 216 break; 217 } 218 fragmented = 1; 219 connection->attribute_value_offset = 0; 220 break; 221 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 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->song_length_ms); 225 break; 226 } 227 fragmented = 1; 228 connection->attribute_value_offset = 0; 229 break; 230 default:{ 231 uint8_t header = (connection->attribute_value_offset == 0); 232 uint8_t * attr_value = (uint8_t *) (connection->now_playing_info[attr_index].value + connection->attribute_value_offset); 233 uint16_t attr_value_len = connection->now_playing_info[attr_index].len - connection->attribute_value_offset; 234 235 num_bytes_to_write = attr_value_len + header * AVRCP_ATTR_HEADER_LEN; 236 if (num_bytes_to_write <= num_free_bytes){ 237 connection->attribute_value_offset = 0; 238 num_written_bytes = num_bytes_to_write; 239 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); 240 break; 241 } 242 fragmented = 1; 243 num_written_bytes = num_free_bytes; 244 attr_value_len = num_free_bytes - header * AVRCP_ATTR_HEADER_LEN; 245 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); 246 connection->attribute_value_offset += attr_value_len; 247 break; 248 } 249 } 250 pos += num_written_bytes; 251 num_free_bytes -= num_written_bytes; 252 } 253 if (!fragmented){ 254 connection->next_attr_id++; 255 } 256 } 257 258 if (fragmented){ 259 switch (connection->packet_type){ 260 case AVRCP_SINGLE_PACKET: 261 connection->packet_type = AVRCP_START_PACKET; 262 break; 263 default: 264 connection->packet_type = AVRCP_CONTINUE_PACKET; 265 break; 266 } 267 } else { 268 if (connection->next_attr_id >= AVRCP_MEDIA_ATTR_SONG_LENGTH_MS){ // DONE 269 if (connection->packet_type != AVRCP_SINGLE_PACKET){ 270 connection->packet_type = AVRCP_END_PACKET; 271 } 272 } 273 } 274 packet[pos_packet_type] = connection->packet_type; 275 // store attr value length 276 big_endian_store_16(packet, playing_info_buffer_len_position, pos - playing_info_buffer_len_position - 2); 277 return l2cap_send_prepared(cid, size); 278 } 279 280 281 282 static int avrcp_target_send_response(uint16_t cid, avrcp_connection_t * connection){ 283 int pos = 0; 284 l2cap_reserve_packet_buffer(); 285 uint8_t * packet = l2cap_get_outgoing_buffer(); 286 287 // transport header 288 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 289 290 // TODO: check for fragmentation 291 connection->packet_type = AVRCP_SINGLE_PACKET; 292 293 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 294 // Profile IDentifier (PID) 295 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 296 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 297 // command_type 298 packet[pos++] = connection->command_type; 299 // subunit_type | subunit ID 300 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 301 // opcode 302 packet[pos++] = (uint8_t)connection->command_opcode; 303 // operands 304 memcpy(packet+pos, connection->cmd_operands, connection->cmd_operands_length); 305 // printf_hexdump(packet+pos, connection->cmd_operands_length); 306 307 pos += connection->cmd_operands_length; 308 connection->wait_to_send = 0; 309 return l2cap_send_prepared(cid, pos); 310 } 311 312 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, avrcp_status_code_t status){ 313 // AVRCP_CTYPE_RESPONSE_REJECTED 314 connection->command_type = AVRCP_CTYPE_RESPONSE_ACCEPTED; 315 connection->subunit_type = subunit_type; 316 connection->subunit_id = subunit_id; 317 connection->command_opcode = opcode; 318 // company id is 3 bytes long 319 int pos = connection->cmd_operands_length; 320 connection->cmd_operands[pos++] = pdu_id; 321 connection->cmd_operands[pos++] = 0; 322 // param length 323 big_endian_store_16(connection->cmd_operands, pos, 1); 324 pos += 2; 325 connection->cmd_operands[pos++] = status; 326 connection->cmd_operands_length = pos; 327 connection->state = AVCTP_W2_SEND_RESPONSE; 328 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 329 return ERROR_CODE_SUCCESS; 330 } 331 332 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){ 333 // AVRCP_CTYPE_RESPONSE_REJECTED 334 connection->command_type = AVRCP_CTYPE_RESPONSE_REJECTED; 335 connection->subunit_type = subunit_type; 336 connection->subunit_id = subunit_id; 337 connection->command_opcode = opcode; 338 // company id is 3 bytes long 339 int pos = connection->cmd_operands_length; 340 connection->cmd_operands[pos++] = pdu_id; 341 connection->cmd_operands[pos++] = 0; 342 // param length 343 big_endian_store_16(connection->cmd_operands, pos, 1); 344 pos += 2; 345 connection->cmd_operands[pos++] = status; 346 connection->cmd_operands_length = pos; 347 connection->state = AVCTP_W2_SEND_RESPONSE; 348 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 349 return ERROR_CODE_SUCCESS; 350 } 351 352 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){ 353 connection->command_type = AVRCP_CTYPE_RESPONSE_NOT_IMPLEMENTED; 354 connection->subunit_type = subunit_type; 355 connection->subunit_id = subunit_id; 356 connection->command_opcode = opcode; 357 358 // company id is 3 bytes long 359 int pos = connection->cmd_operands_length; 360 connection->cmd_operands[pos++] = pdu_id; 361 connection->cmd_operands[pos++] = 0; 362 // param length 363 big_endian_store_16(connection->cmd_operands, pos, 1); 364 pos += 2; 365 connection->cmd_operands[pos++] = event_id; 366 connection->cmd_operands_length = pos; 367 368 connection->state = AVCTP_W2_SEND_RESPONSE; 369 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 370 return ERROR_CODE_SUCCESS; 371 } 372 373 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, 374 avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, uint8_t event_id, const uint8_t * value, uint16_t value_len){ 375 connection->command_type = AVRCP_CTYPE_RESPONSE_INTERIM; 376 connection->subunit_type = subunit_type; 377 connection->subunit_id = subunit_id; 378 connection->command_opcode = opcode; 379 380 // company id is 3 bytes long 381 int pos = connection->cmd_operands_length; 382 connection->cmd_operands[pos++] = pdu_id; 383 connection->cmd_operands[pos++] = 0; 384 // param length 385 big_endian_store_16(connection->cmd_operands, pos, 1 + value_len); 386 pos += 2; 387 connection->cmd_operands[pos++] = event_id; 388 if (value && value_len > 0){ 389 memcpy(connection->cmd_operands + pos, value, value_len); 390 pos += value_len; 391 } 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_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){ 400 connection->command_type = AVRCP_CTYPE_RESPONSE_INTERIM; 401 connection->subunit_type = subunit_type; 402 connection->subunit_id = subunit_id; 403 connection->command_opcode = opcode; 404 405 // company id is 3 bytes long 406 int pos = connection->cmd_operands_length; 407 connection->cmd_operands[pos++] = pdu_id; 408 connection->cmd_operands[pos++] = 0; 409 // param length 410 big_endian_store_16(connection->cmd_operands, pos, 5); 411 pos += 2; 412 connection->cmd_operands[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 413 big_endian_read_16( &connection->cmd_operands[pos], connection->addressed_player_id); 414 pos += 2; 415 big_endian_read_16( &connection->cmd_operands[pos], connection->uid_counter); 416 pos += 2; 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 } 423 424 425 // static uint8_t avrcp_target_response_vendor_dependent_changed(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id, uint8_t event_id){ 426 // connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 427 // connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 428 // connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 429 // connection->subunit_id = AVRCP_SUBUNIT_ID; 430 431 // // company id is 3 bytes long 432 // int pos = connection->cmd_operands_length; 433 // connection->cmd_operands[pos++] = pdu_id; 434 // connection->cmd_operands[pos++] = 0; 435 // // param length 436 // big_endian_store_16(connection->cmd_operands, pos, 1); 437 // pos += 2; 438 // connection->cmd_operands[pos++] = event_id; 439 // connection->cmd_operands_length = pos; 440 441 // connection->state = AVCTP_W2_SEND_RESPONSE; 442 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 443 // return ERROR_CODE_SUCCESS; 444 // } 445 446 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){ 447 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 448 if (!connection){ 449 log_error("Could not find a connection."); 450 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 451 } 452 connection->command_type = cmd_type; 453 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 454 connection->subunit_id = AVRCP_SUBUNIT_ID; 455 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 456 457 int pos = 0; 458 connection->cmd_operands[pos++] = opid; 459 connection->cmd_operands[pos++] = operands_length; 460 if (operands_length == 1){ 461 connection->cmd_operands[pos++] = operand; 462 } 463 connection->cmd_operands_length = pos; 464 465 connection->state = AVCTP_W2_SEND_RESPONSE; 466 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 467 return ERROR_CODE_SUCCESS; 468 } 469 470 uint8_t avrcp_target_operation_rejected(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 471 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_REJECTED, opid, operands_length, operand); 472 } 473 474 uint8_t avrcp_target_operation_accepted(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 475 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 476 } 477 478 uint8_t avrcp_target_operation_not_implemented(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 479 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 480 } 481 482 void avrcp_target_set_unit_info(uint16_t avrcp_cid, avrcp_subunit_type_t unit_type, uint32_t company_id){ 483 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 484 if (!connection){ 485 log_error("avrcp_target_operation_reject: could not find a connection."); 486 return; 487 } 488 connection->unit_type = unit_type; 489 connection->company_id = company_id; 490 } 491 492 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){ 493 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 494 if (!connection){ 495 log_error("avrcp_target_operation_reject: could not find a connection."); 496 return; 497 } 498 connection->subunit_info_type = subunit_type; 499 connection->subunit_info_data = subunit_info_data; 500 connection->subunit_info_data_size = subunit_info_data_size; 501 } 502 503 static uint8_t avrcp_target_unit_info(avrcp_connection_t * connection){ 504 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 505 506 uint8_t unit = 0; 507 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 508 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 509 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 510 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 511 512 connection->cmd_operands_length = 5; 513 connection->cmd_operands[0] = 0x07; 514 connection->cmd_operands[1] = (connection->unit_type << 4) | unit; 515 // company id is 3 bytes long 516 big_endian_store_32(connection->cmd_operands, 2, connection->company_id); 517 518 connection->state = AVCTP_W2_SEND_RESPONSE; 519 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 520 return ERROR_CODE_SUCCESS; 521 } 522 523 static uint8_t avrcp_target_subunit_info(avrcp_connection_t * connection, uint8_t offset){ 524 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 525 if (offset - 4 > connection->subunit_info_data_size) return AVRCP_STATUS_INVALID_PARAMETER; 526 527 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 528 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 529 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 530 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 531 // printf("avrcp_target_subunit_info subunit_type %d\n", connection->subunit_type); 532 533 uint8_t page = offset / 4; 534 uint8_t extension_code = 7; 535 connection->cmd_operands_length = 5; 536 connection->cmd_operands[0] = (page << 4) | extension_code; 537 538 memcpy(connection->cmd_operands+1, connection->subunit_info_data + offset, 4); 539 540 connection->state = AVCTP_W2_SEND_RESPONSE; 541 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 542 return ERROR_CODE_SUCCESS; 543 } 544 545 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){ 546 *out_connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 547 if (!*out_connection){ 548 log_error("avrcp tartget: could not find a connection."); 549 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 550 } 551 552 if ((*out_connection)->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 553 (*out_connection)->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 554 (*out_connection)->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 555 (*out_connection)->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 556 (*out_connection)->subunit_id = AVRCP_SUBUNIT_ID; 557 558 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = pdu_id; 559 // reserved 560 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = 0; 561 // param length 562 big_endian_store_16((*out_connection)->cmd_operands, (*out_connection)->cmd_operands_length, param_length); 563 (*out_connection)->cmd_operands_length += 2; 564 return ERROR_CODE_SUCCESS; 565 } 566 567 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){ 568 avrcp_connection_t * connection = NULL; 569 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_CAPABILITIES, 2+size); 570 if (status != ERROR_CODE_SUCCESS) return status; 571 572 connection->cmd_operands[connection->cmd_operands_length++] = capability_id; 573 connection->cmd_operands[connection->cmd_operands_length++] = capabilities_num; 574 memcpy(connection->cmd_operands+connection->cmd_operands_length, capabilities, size); 575 connection->cmd_operands_length += size; 576 577 connection->state = AVCTP_W2_SEND_RESPONSE; 578 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 579 return ERROR_CODE_SUCCESS; 580 } 581 582 uint8_t avrcp_target_supported_events(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size){ 583 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_EVENT, capabilities_num, capabilities, size); 584 } 585 586 uint8_t avrcp_target_supported_companies(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size ){ 587 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_COMPANY, capabilities_num, capabilities, size); 588 } 589 590 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){ 591 avrcp_connection_t * connection = NULL; 592 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_PLAY_STATUS, 11); 593 if (status != ERROR_CODE_SUCCESS) return status; 594 595 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_length_ms); 596 connection->cmd_operands_length += 4; 597 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_position_ms); 598 connection->cmd_operands_length += 4; 599 connection->cmd_operands[connection->cmd_operands_length++] = play_status; 600 601 connection->state = AVCTP_W2_SEND_RESPONSE; 602 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 603 return ERROR_CODE_SUCCESS; 604 } 605 606 static uint8_t avrcp_target_now_playing_info(avrcp_connection_t * connection){ 607 connection->now_playing_info_response = 1; 608 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 609 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 610 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 611 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 612 connection->subunit_id = AVRCP_SUBUNIT_ID; 613 614 connection->state = AVCTP_W2_SEND_RESPONSE; 615 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 616 return ERROR_CODE_SUCCESS; 617 } 618 619 static uint8_t avrcp_target_store_media_attr(avrcp_connection_t * connection, avrcp_media_attribute_id_t attr_id, const char * value){ 620 int index = attr_id - 1; 621 if (!value) return AVRCP_STATUS_INVALID_PARAMETER; 622 connection->now_playing_info[index].value = (uint8_t*)value; 623 connection->now_playing_info[index].len = strlen(value); 624 // printf("store %lu bytes, %s\n", strlen(value), value); 625 return ERROR_CODE_SUCCESS; 626 } 627 628 uint8_t avrcp_target_set_playback_status(uint16_t avrcp_cid, avrcp_playback_status_t playback_status){ 629 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 630 if (!connection){ 631 log_error("avrcp_unit_info: could not find a connection."); 632 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 633 } 634 if (connection->playback_status == playback_status) return ERROR_CODE_SUCCESS; 635 636 connection->playback_status = playback_status; 637 connection->playback_status_changed = 1; 638 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 639 return ERROR_CODE_SUCCESS; 640 } 641 642 void avrcp_target_set_now_playing_info(uint16_t avrcp_cid, const avrcp_track_t * current_track, uint16_t total_tracks){ 643 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 644 if (!connection){ 645 log_error("avrcp_unit_info: could not find a connection. cid 0x%02x\n", avrcp_cid); 646 return; 647 } 648 if (!current_track){ 649 connection->track_selected = 0; 650 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 651 return; 652 } 653 memcpy(connection->track_id, current_track->track_id, 8); 654 connection->song_length_ms = current_track->song_length_ms; 655 connection->track_nr = current_track->track_nr; 656 connection->total_tracks = total_tracks; 657 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_TITLE, current_track->title); 658 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ARTIST, current_track->artist); 659 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ALBUM, current_track->album); 660 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_GENRE, current_track->genre); 661 connection->track_selected = 1; 662 663 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 664 connection->track_changed = 1; 665 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 666 } 667 return; 668 } 669 670 uint8_t avrcp_target_track_changed(uint16_t avrcp_cid, uint8_t * track_id){ 671 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 672 if (!connection){ 673 log_error("avrcp_target_track_changed: could not find connection."); 674 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 675 } 676 if (!track_id) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 677 678 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 679 connection->track_changed = 1; 680 memcpy(connection->track_id, track_id, 8); 681 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 682 } 683 return ERROR_CODE_SUCCESS; 684 } 685 686 uint8_t avrcp_target_playing_content_changed(uint16_t avrcp_cid){ 687 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 688 if (!connection){ 689 log_error("avrcp_target_playing_content_changed: could not find a connection."); 690 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 691 } 692 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED)) { 693 connection->playing_content_changed = 1; 694 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 695 } 696 return ERROR_CODE_SUCCESS; 697 } 698 699 uint8_t avrcp_target_addressed_player_changed(uint16_t avrcp_cid, uint16_t player_id, uint16_t uid_counter){ 700 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 701 if (!connection){ 702 log_error("avrcp_unit_info: could not find a connection."); 703 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 704 } 705 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED)) { 706 // printf("send AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED\n"); 707 // connection->addressed_player_changed = 1; 708 connection->uid_counter = uid_counter; 709 connection->addressed_player_id = player_id; 710 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 711 } 712 return ERROR_CODE_SUCCESS; 713 } 714 715 uint8_t avrcp_target_battery_status_changed(uint16_t avrcp_cid, avrcp_battery_status_t battery_status){ 716 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 717 if (!connection){ 718 log_error("avrcp_unit_info: could not find a connection."); 719 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 720 } 721 if (connection->battery_status == battery_status) return ERROR_CODE_SUCCESS; 722 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED)) { 723 connection->battery_status = battery_status; 724 connection->battery_status_changed = 1; 725 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 726 } 727 return ERROR_CODE_SUCCESS; 728 } 729 730 uint8_t avrcp_target_volume_changed(uint16_t avrcp_cid, uint8_t volume_percentage){ 731 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 732 if (!connection){ 733 log_error("avrcp_unit_info: could not find a connection."); 734 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 735 } 736 if (connection->volume_percentage == volume_percentage) return ERROR_CODE_SUCCESS; 737 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED )) { 738 connection->volume_percentage = volume_percentage; 739 connection->volume_percentage_changed = 1; 740 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 741 } 742 return ERROR_CODE_SUCCESS; 743 } 744 745 746 static uint8_t * avrcp_get_company_id(uint8_t *packet, uint16_t size){ 747 UNUSED(size); 748 return packet + 6; 749 } 750 751 static uint8_t * avrcp_get_pdu(uint8_t *packet, uint16_t size){ 752 UNUSED(size); 753 return packet + 9; 754 } 755 756 static uint8_t avrcp_is_receive_pass_through_cmd(uint8_t operation_id){ 757 return operation_id & 0x80; 758 } 759 760 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 761 UNUSED(connection); 762 UNUSED(packet); 763 UNUSED(size); 764 765 // uint8_t opcode; 766 767 uint8_t transport_header = packet[0]; 768 connection->transaction_label = transport_header >> 4; 769 // uint8_t packet_type = (transport_header & 0x0F) >> 2; 770 // uint8_t frame_type = (transport_header & 0x03) >> 1; 771 // uint8_t ipid = transport_header & 0x01; 772 // uint8_t byte_value = packet[2]; 773 // uint16_t pid = (byte_value << 8) | packet[2]; 774 // avrcp_command_type_t ctype = (avrcp_command_type_t) packet[3]; 775 // uint8_t byte_value = packet[4]; 776 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (packet[4] >> 3); 777 avrcp_subunit_id_t subunit_id = (avrcp_subunit_id_t) (packet[4] & 0x07); 778 // opcode = packet[pos++]; 779 780 // printf(" Transport header 0x%02x (transaction_label %d, packet_type %d, frame_type %d, ipid %d), pid 0x%4x\n", 781 // transport_header, transaction_label, packet_type, frame_type, ipid, pid); 782 // printf_hexdump(packet+pos, size-pos); 783 784 avrcp_command_opcode_t opcode = avrcp_cmd_opcode(packet,size); 785 uint8_t * company_id = avrcp_get_company_id(packet, size); 786 uint8_t * pdu = avrcp_get_pdu(packet, size); 787 // uint16_t param_length = big_endian_read_16(pdu, 2); 788 789 int pos = 4; 790 uint8_t pdu_id; 791 connection->cmd_operands_length = 0; 792 793 switch (opcode){ 794 case AVRCP_CMD_OPCODE_UNIT_INFO: 795 avrcp_target_unit_info(connection); 796 break; 797 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 798 uint8_t offset = 4 * (packet[pos+2]>>4); 799 avrcp_target_subunit_info(connection, offset); 800 break; 801 } 802 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 803 log_info("AVRCP_OPERATION_ID 0x%02x, operands length %d, operand %d", packet[6], packet[7], packet[8]); 804 avrcp_operation_id_t operation_id = packet[6]; 805 806 if (avrcp_is_receive_pass_through_cmd(operation_id)){ 807 operation_id = packet[6] & 0x7F; 808 avrcp_target_operation_accepted(connection->avrcp_cid, packet[6], packet[7], packet[8]); 809 break; 810 } 811 812 switch (operation_id){ 813 case AVRCP_OPERATION_ID_PLAY: 814 case AVRCP_OPERATION_ID_PAUSE: 815 case AVRCP_OPERATION_ID_STOP: 816 case AVRCP_OPERATION_ID_VOLUME_UP: 817 case AVRCP_OPERATION_ID_VOLUME_DOWN: 818 case AVRCP_OPERATION_ID_REWIND: 819 case AVRCP_OPERATION_ID_FAST_FORWARD: 820 case AVRCP_OPERATION_ID_FORWARD: 821 case AVRCP_OPERATION_ID_BACKWARD: 822 case AVRCP_OPERATION_ID_SKIP: 823 case AVRCP_OPERATION_ID_MUTE: 824 case AVRCP_OPERATION_ID_CHANNEL_UP: 825 case AVRCP_OPERATION_ID_CHANNEL_DOWN: 826 case AVRCP_OPERATION_ID_SELECT: 827 case AVRCP_OPERATION_ID_UP: 828 case AVRCP_OPERATION_ID_DOWN: 829 case AVRCP_OPERATION_ID_LEFT: 830 case AVRCP_OPERATION_ID_RIGHT: 831 case AVRCP_OPERATION_ID_ROOT_MENU: 832 avrcp_target_operation_accepted(connection->avrcp_cid, packet[6], packet[7], packet[8]); 833 avrcp_target_emit_operation(avrcp_target_context.avrcp_callback, connection->avrcp_cid, operation_id, packet[7], packet[8]); 834 break; 835 case AVRCP_OPERATION_ID_UNDEFINED: 836 avrcp_target_operation_not_implemented(connection->avrcp_cid, packet[6], packet[7], packet[8]); 837 return; 838 default: 839 avrcp_target_operation_not_implemented(connection->avrcp_cid, packet[6], packet[7], packet[8]); 840 return; 841 } 842 break; 843 } 844 845 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 846 pdu_id = pdu[0]; 847 // 1 - reserved 848 // 2-3 param length, 849 uint16_t length = big_endian_read_16(pdu, 2); 850 memcpy(connection->cmd_operands, company_id, 3); 851 connection->cmd_operands_length = 3; 852 switch (pdu_id){ 853 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER:{ 854 if (length == 0){ 855 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PLAYER_ID); 856 break; 857 } 858 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_SUCCESS); 859 break; 860 } 861 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 862 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) pdu[pos]; 863 switch (capability_id){ 864 case AVRCP_CAPABILITY_ID_EVENT: 865 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_EVENT_IDS_QUERY); 866 break; 867 case AVRCP_CAPABILITY_ID_COMPANY: 868 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_COMPANY_IDS_QUERY); 869 break; 870 default: 871 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 872 break; 873 } 874 break; 875 } 876 case AVRCP_PDU_ID_GET_PLAY_STATUS: 877 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_PLAY_STATUS_QUERY); 878 break; 879 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 880 connection->cmd_operands[0] = pdu[4]; 881 connection->abort_continue_response = 1; 882 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 883 break; 884 case AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE: 885 if (pdu[4] != AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES){ 886 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 887 return; 888 } 889 connection->now_playing_info_response = 1; 890 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 891 break; 892 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 893 uint8_t play_identifier[8]; 894 memset(play_identifier, 0, 8); 895 if (memcmp(pdu+pos, play_identifier, 8) != 0) { 896 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 897 return; 898 } 899 pos += 8; 900 uint8_t attribute_count = pdu[pos++]; 901 // printf("AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES attribute count %d\n", attribute_count); 902 connection->next_attr_id = AVRCP_MEDIA_ATTR_NONE; 903 if (!attribute_count){ 904 connection->now_playing_info_attr_bitmap = 0xFE; 905 } else { 906 int i; 907 connection->now_playing_info_attr_bitmap = 0; 908 for (i=0; i < attribute_count; i++){ 909 uint16_t attr_id = big_endian_read_16(pdu, pos); 910 pos += 2; 911 connection->now_playing_info_attr_bitmap |= (1 << attr_id); 912 } 913 } 914 log_info("now_playing_info_attr_bitmap 0x%02x", connection->now_playing_info_attr_bitmap); 915 avrcp_target_now_playing_info(connection); 916 break; 917 } 918 case AVRCP_PDU_ID_REGISTER_NOTIFICATION:{ 919 // 0 - pdu id 920 // 1 - reserved 921 // 2-3 param length 922 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) pdu[4]; 923 uint16_t event_mask = (1 << event_id); 924 925 switch (event_id){ 926 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED: 927 connection->notifications_enabled |= event_mask; 928 if (connection->track_selected){ 929 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_SELECTED, 8); 930 } else { 931 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_NOT_SELECTED, 8); 932 } 933 break; 934 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED: 935 connection->notifications_enabled |= event_mask; 936 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->playback_status, 1); 937 break; 938 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED: 939 connection->notifications_enabled |= event_mask; 940 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, NULL, 0); 941 break; 942 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED: 943 connection->notifications_enabled |= event_mask; 944 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->volume_percentage, 1); 945 break; 946 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED: 947 connection->notifications_enabled |= event_mask; 948 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->battery_status, 1); 949 break; 950 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED: 951 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 952 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED: 953 avrcp_target_response_not_implemented(connection, subunit_type, subunit_id, opcode, pdu_id, event_id); 954 return; 955 case AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED: 956 connection->notifications_enabled |= event_mask; 957 avrcp_target_response_addressed_player_changed_interim(connection, subunit_type, subunit_id, opcode, pdu_id); 958 return; 959 default: 960 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 961 return; 962 } 963 break; 964 } 965 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME: { 966 if (length != 1){ 967 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 968 break; 969 } 970 971 uint8_t absolute_volume = pdu[4]; 972 if (absolute_volume < 0x80){ 973 connection->volume_percentage = absolute_volume; 974 } 975 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, connection->volume_percentage); 976 break; 977 } 978 default: 979 log_info("AVRCP target: unhandled pdu id 0x%02x", pdu_id); 980 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 981 break; 982 } 983 break; 984 default: 985 log_info("AVRCP target: opcode 0x%02x not implemented", avrcp_cmd_opcode(packet,size)); 986 break; 987 } 988 } 989 990 #if 0 991 static int avrcp_target_send_addressed_player_changed_notification(uint16_t cid, avrcp_connection_t * connection, uint16_t uid, uint16_t uid_counter){ 992 if (!connection){ 993 log_error("avrcp tartget: could not find a connection."); 994 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 995 } 996 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 997 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 998 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 999 connection->subunit_id = AVRCP_SUBUNIT_ID; 1000 1001 uint16_t pos = 0; 1002 l2cap_reserve_packet_buffer(); 1003 uint8_t * packet = l2cap_get_outgoing_buffer(); 1004 1005 connection->packet_type = AVRCP_SINGLE_PACKET; 1006 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1007 // Profile IDentifier (PID) 1008 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1009 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1010 1011 // command_type 1012 packet[pos++] = connection->command_type; 1013 // subunit_type | subunit ID 1014 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1015 // opcode 1016 packet[pos++] = (uint8_t)connection->command_opcode; 1017 1018 // company id is 3 bytes long 1019 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1020 pos += 3; 1021 1022 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1023 packet[pos++] = 0; 1024 big_endian_store_16(packet, pos, 5); 1025 pos += 2; 1026 packet[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 1027 big_endian_store_16(packet, pos, uid); 1028 pos += 2; 1029 big_endian_store_16(packet, pos, uid_counter); 1030 pos += 2; 1031 1032 connection->wait_to_send = 0; 1033 return l2cap_send_prepared(cid, pos); 1034 } 1035 #endif 1036 1037 static int avrcp_target_send_notification(uint16_t cid, avrcp_connection_t * connection, uint8_t notification_id, uint8_t * value, uint16_t value_len){ 1038 if (!connection){ 1039 log_error("avrcp tartget: could not find a connection."); 1040 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1041 } 1042 1043 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1044 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 1045 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1046 connection->subunit_id = AVRCP_SUBUNIT_ID; 1047 1048 uint16_t pos = 0; 1049 l2cap_reserve_packet_buffer(); 1050 uint8_t * packet = l2cap_get_outgoing_buffer(); 1051 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 1052 1053 connection->packet_type = AVRCP_SINGLE_PACKET; 1054 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1055 // Profile IDentifier (PID) 1056 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1057 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1058 1059 // command_type 1060 packet[pos++] = connection->command_type; 1061 // subunit_type | subunit ID 1062 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1063 // opcode 1064 packet[pos++] = (uint8_t)connection->command_opcode; 1065 1066 // company id is 3 bytes long 1067 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1068 pos += 3; 1069 1070 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1071 packet[pos++] = 0; 1072 uint16_t remainig_outgoing_buffer_size = size > (value_len + 2 + 1) ? size - (value_len + 2 + 1): 0; 1073 uint16_t caped_value_len = value_len > remainig_outgoing_buffer_size ? remainig_outgoing_buffer_size : value_len; 1074 big_endian_store_16(packet, pos, caped_value_len); 1075 pos += 2; 1076 packet[pos++] = notification_id; 1077 1078 memcpy(packet+pos, value, caped_value_len); 1079 pos += caped_value_len; 1080 connection->wait_to_send = 0; 1081 return l2cap_send_prepared(cid, pos); 1082 } 1083 1084 static void avrcp_target_reset_notification(avrcp_connection_t * connection, uint8_t notification_id){ 1085 if (!connection){ 1086 log_error("avrcp tartget: could not find a connection."); 1087 return; 1088 } 1089 connection->notifications_enabled &= ~(1 << notification_id); 1090 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1091 1092 } 1093 1094 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1095 avrcp_connection_t * connection; 1096 switch (packet_type) { 1097 case L2CAP_DATA_PACKET: 1098 connection = get_avrcp_connection_for_l2cap_signaling_cid(channel, &avrcp_target_context); 1099 if (!connection) break; 1100 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1101 break; 1102 case HCI_EVENT_PACKET: 1103 switch (hci_event_packet_get_type(packet)){ 1104 case L2CAP_EVENT_CAN_SEND_NOW:{ 1105 connection = get_avrcp_connection_for_l2cap_signaling_cid(channel, &avrcp_target_context); 1106 if (!connection) { 1107 log_error("Connection not found\n"); 1108 break; 1109 } 1110 1111 if (connection->abort_continue_response){ 1112 connection->abort_continue_response = 0; 1113 connection->now_playing_info_response = 0; 1114 avrcp_target_abort_continue_response(connection->l2cap_signaling_cid, connection); 1115 break; 1116 } 1117 1118 if (connection->now_playing_info_response){ 1119 connection->now_playing_info_response = 0; 1120 avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1121 break; 1122 } 1123 1124 if (connection->track_changed){ 1125 connection->track_changed = 0; 1126 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, connection->track_id, 8); 1127 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1128 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1129 break; 1130 } 1131 1132 if (connection->playback_status_changed){ 1133 connection->playback_status_changed = 0; 1134 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, &connection->playback_status_changed, 1); 1135 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 1136 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1137 break; 1138 } 1139 1140 // if (connection->addressed_player_changed){ 1141 // connection->playback_status_changed = 0; 1142 // avrcp_target_send_addressed_player_changed_notification(connection->l2cap_signaling_cid, connection, connection->addressed_player_id, connection->uid_counter); 1143 // avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED); 1144 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1145 // break; 1146 // } 1147 1148 if (connection->playing_content_changed){ 1149 connection->playing_content_changed = 0; 1150 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED, NULL, 0); 1151 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 1152 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1153 break; 1154 } 1155 1156 if (connection->battery_status_changed){ 1157 connection->battery_status_changed = 0; 1158 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED, (uint8_t *)&connection->battery_status, 1); 1159 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 1160 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1161 break; 1162 } 1163 1164 if (connection->volume_percentage_changed){ 1165 connection->volume_percentage_changed = 0; 1166 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED, &connection->volume_percentage, 1); 1167 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 1168 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1169 break; 1170 } 1171 1172 switch (connection->state){ 1173 case AVCTP_W2_SEND_RESPONSE: 1174 connection->state = AVCTP_CONNECTION_OPENED; 1175 // if (connection->now_playing_info_response){ 1176 // connection->now_playing_info_response = 0; 1177 // avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1178 // break; 1179 // } 1180 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1181 break; 1182 default: 1183 return; 1184 } 1185 break; 1186 } 1187 default: 1188 avrcp_packet_handler(packet_type, channel, packet, size, &avrcp_target_context); 1189 break; 1190 } 1191 default: 1192 break; 1193 } 1194 } 1195 1196 void avrcp_target_init(void){ 1197 avrcp_target_context.role = AVRCP_TARGET; 1198 avrcp_target_context.connections = NULL; 1199 avrcp_target_context.packet_handler = avrcp_target_packet_handler; 1200 l2cap_register_service(&avrcp_target_packet_handler, BLUETOOTH_PROTOCOL_AVCTP, 0xffff, LEVEL_0); 1201 } 1202 1203 void avrcp_target_register_packet_handler(btstack_packet_handler_t callback){ 1204 if (callback == NULL){ 1205 log_error("avrcp_register_packet_handler called with NULL callback"); 1206 return; 1207 } 1208 avrcp_target_context.avrcp_callback = callback; 1209 } 1210 1211 uint8_t avrcp_target_connect(bd_addr_t bd_addr, uint16_t * avrcp_cid){ 1212 return avrcp_connect(bd_addr, &avrcp_target_context, avrcp_cid); 1213 } 1214 1215 uint8_t avrcp_target_disconnect(uint16_t avrcp_cid){ 1216 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 1217 if (!connection){ 1218 log_error("avrcp_get_capabilities: could not find a connection."); 1219 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1220 } 1221 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1222 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1223 return ERROR_CODE_SUCCESS; 1224 } 1225 1226