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, avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, uint8_t event_id, const uint8_t * value, uint16_t value_len){ 374 connection->command_type = AVRCP_CTYPE_RESPONSE_INTERIM; 375 connection->subunit_type = subunit_type; 376 connection->subunit_id = subunit_id; 377 connection->command_opcode = opcode; 378 379 // company id is 3 bytes long 380 int pos = connection->cmd_operands_length; 381 connection->cmd_operands[pos++] = pdu_id; 382 connection->cmd_operands[pos++] = 0; 383 // param length 384 big_endian_store_16(connection->cmd_operands, pos, 1 + value_len); 385 pos += 2; 386 connection->cmd_operands[pos++] = event_id; 387 if (value && value_len > 0){ 388 memcpy(connection->cmd_operands + pos, value, value_len); 389 pos += value_len; 390 } 391 connection->cmd_operands_length = pos; 392 393 connection->state = AVCTP_W2_SEND_RESPONSE; 394 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 395 return ERROR_CODE_SUCCESS; 396 } 397 398 // static uint8_t avrcp_target_response_vendor_dependent_changed(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id, uint8_t event_id){ 399 // connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 400 // connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 401 // connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 402 // connection->subunit_id = AVRCP_SUBUNIT_ID; 403 404 // // company id is 3 bytes long 405 // int pos = connection->cmd_operands_length; 406 // connection->cmd_operands[pos++] = pdu_id; 407 // connection->cmd_operands[pos++] = 0; 408 // // param length 409 // big_endian_store_16(connection->cmd_operands, pos, 1); 410 // pos += 2; 411 // connection->cmd_operands[pos++] = event_id; 412 // connection->cmd_operands_length = pos; 413 414 // connection->state = AVCTP_W2_SEND_RESPONSE; 415 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 416 // return ERROR_CODE_SUCCESS; 417 // } 418 419 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){ 420 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 421 if (!connection){ 422 log_error("Could not find a connection."); 423 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 424 } 425 connection->command_type = cmd_type; 426 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 427 connection->subunit_id = AVRCP_SUBUNIT_ID; 428 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 429 430 int pos = 0; 431 connection->cmd_operands[pos++] = opid; 432 connection->cmd_operands[pos++] = operands_length; 433 if (operands_length == 1){ 434 connection->cmd_operands[pos++] = operand; 435 } 436 connection->cmd_operands_length = pos; 437 438 connection->state = AVCTP_W2_SEND_RESPONSE; 439 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 440 return ERROR_CODE_SUCCESS; 441 } 442 443 uint8_t avrcp_target_operation_rejected(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 444 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_REJECTED, opid, operands_length, operand); 445 } 446 447 uint8_t avrcp_target_operation_accepted(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 448 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 449 } 450 451 uint8_t avrcp_target_operation_not_implemented(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 452 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 453 } 454 455 void avrcp_target_set_unit_info(uint16_t avrcp_cid, avrcp_subunit_type_t unit_type, uint32_t company_id){ 456 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 457 if (!connection){ 458 log_error("avrcp_target_operation_reject: could not find a connection."); 459 return; 460 } 461 connection->unit_type = unit_type; 462 connection->company_id = company_id; 463 } 464 465 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){ 466 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 467 if (!connection){ 468 log_error("avrcp_target_operation_reject: could not find a connection."); 469 return; 470 } 471 connection->subunit_info_type = subunit_type; 472 connection->subunit_info_data = subunit_info_data; 473 connection->subunit_info_data_size = subunit_info_data_size; 474 } 475 476 static uint8_t avrcp_target_unit_info(avrcp_connection_t * connection){ 477 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 478 479 uint8_t unit = 0; 480 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 481 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 482 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 483 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 484 485 connection->cmd_operands_length = 5; 486 connection->cmd_operands[0] = 0x07; 487 connection->cmd_operands[1] = (connection->unit_type << 4) | unit; 488 // company id is 3 bytes long 489 big_endian_store_32(connection->cmd_operands, 2, connection->company_id); 490 491 connection->state = AVCTP_W2_SEND_RESPONSE; 492 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 493 return ERROR_CODE_SUCCESS; 494 } 495 496 static uint8_t avrcp_target_subunit_info(avrcp_connection_t * connection, uint8_t offset){ 497 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 498 if (offset - 4 > connection->subunit_info_data_size) return AVRCP_STATUS_INVALID_PARAMETER; 499 500 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 501 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 502 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 503 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 504 // printf("avrcp_target_subunit_info subunit_type %d\n", connection->subunit_type); 505 506 uint8_t page = offset / 4; 507 uint8_t extension_code = 7; 508 connection->cmd_operands_length = 5; 509 connection->cmd_operands[0] = (page << 4) | extension_code; 510 511 memcpy(connection->cmd_operands+1, connection->subunit_info_data + offset, 4); 512 513 connection->state = AVCTP_W2_SEND_RESPONSE; 514 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 515 return ERROR_CODE_SUCCESS; 516 } 517 518 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){ 519 *out_connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 520 if (!*out_connection){ 521 log_error("avrcp tartget: could not find a connection."); 522 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 523 } 524 525 if ((*out_connection)->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 526 (*out_connection)->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 527 (*out_connection)->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 528 (*out_connection)->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 529 (*out_connection)->subunit_id = AVRCP_SUBUNIT_ID; 530 531 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = pdu_id; 532 // reserved 533 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = 0; 534 // param length 535 big_endian_store_16((*out_connection)->cmd_operands, (*out_connection)->cmd_operands_length, param_length); 536 (*out_connection)->cmd_operands_length += 2; 537 return ERROR_CODE_SUCCESS; 538 } 539 540 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){ 541 avrcp_connection_t * connection = NULL; 542 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_CAPABILITIES, 2+size); 543 if (status != ERROR_CODE_SUCCESS) return status; 544 545 connection->cmd_operands[connection->cmd_operands_length++] = capability_id; 546 connection->cmd_operands[connection->cmd_operands_length++] = capabilities_num; 547 memcpy(connection->cmd_operands+connection->cmd_operands_length, capabilities, size); 548 connection->cmd_operands_length += size; 549 550 connection->state = AVCTP_W2_SEND_RESPONSE; 551 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 552 return ERROR_CODE_SUCCESS; 553 } 554 555 uint8_t avrcp_target_supported_events(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size){ 556 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_EVENT, capabilities_num, capabilities, size); 557 } 558 559 uint8_t avrcp_target_supported_companies(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size ){ 560 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_COMPANY, capabilities_num, capabilities, size); 561 } 562 563 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){ 564 avrcp_connection_t * connection = NULL; 565 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_PLAY_STATUS, 11); 566 if (status != ERROR_CODE_SUCCESS) return status; 567 568 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_length_ms); 569 connection->cmd_operands_length += 4; 570 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_position_ms); 571 connection->cmd_operands_length += 4; 572 connection->cmd_operands[connection->cmd_operands_length++] = play_status; 573 574 connection->state = AVCTP_W2_SEND_RESPONSE; 575 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 576 return ERROR_CODE_SUCCESS; 577 } 578 579 static uint8_t avrcp_target_now_playing_info(avrcp_connection_t * connection){ 580 connection->now_playing_info_response = 1; 581 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 582 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 583 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 584 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 585 connection->subunit_id = AVRCP_SUBUNIT_ID; 586 587 connection->state = AVCTP_W2_SEND_RESPONSE; 588 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 589 return ERROR_CODE_SUCCESS; 590 } 591 592 static uint8_t avrcp_target_store_media_attr(avrcp_connection_t * connection, avrcp_media_attribute_id_t attr_id, const char * value){ 593 int index = attr_id - 1; 594 if (!value) return AVRCP_STATUS_INVALID_PARAMETER; 595 connection->now_playing_info[index].value = (uint8_t*)value; 596 connection->now_playing_info[index].len = strlen(value); 597 // printf("store %lu bytes, %s\n", strlen(value), value); 598 return ERROR_CODE_SUCCESS; 599 } 600 601 uint8_t avrcp_target_set_playback_status(uint16_t avrcp_cid, avrcp_playback_status_t playback_status){ 602 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 603 if (!connection){ 604 log_error("avrcp_unit_info: could not find a connection."); 605 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 606 } 607 if (connection->playback_status == playback_status) return ERROR_CODE_SUCCESS; 608 609 connection->playback_status = playback_status; 610 connection->playback_status_changed = 1; 611 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 612 return ERROR_CODE_SUCCESS; 613 } 614 615 void avrcp_target_set_now_playing_info(uint16_t avrcp_cid, const avrcp_track_t * current_track, uint16_t total_tracks){ 616 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 617 if (!connection){ 618 log_error("avrcp_unit_info: could not find a connection. cid 0x%02x\n", avrcp_cid); 619 return; 620 } 621 if (!current_track){ 622 connection->track_selected = 0; 623 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 624 return; 625 } 626 memcpy(connection->track_id, current_track->track_id, 8); 627 connection->song_length_ms = current_track->song_length_ms; 628 connection->track_nr = current_track->track_nr; 629 connection->total_tracks = total_tracks; 630 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_TITLE, current_track->title); 631 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ARTIST, current_track->artist); 632 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ALBUM, current_track->album); 633 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_GENRE, current_track->genre); 634 connection->track_selected = 1; 635 636 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 637 connection->track_changed = 1; 638 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 639 } 640 return; 641 } 642 643 uint8_t avrcp_target_track_changed(uint16_t avrcp_cid, uint8_t * track_id){ 644 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 645 if (!connection){ 646 log_error("avrcp_target_track_changed: could not find connection."); 647 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 648 } 649 if (!track_id) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 650 651 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 652 connection->track_changed = 1; 653 memcpy(connection->track_id, track_id, 8); 654 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 655 } 656 return ERROR_CODE_SUCCESS; 657 } 658 659 uint8_t avrcp_target_playing_content_changed(uint16_t avrcp_cid){ 660 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 661 if (!connection){ 662 log_error("avrcp_unit_info: could not find a connection."); 663 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 664 } 665 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED)) { 666 connection->playing_content_changed = 1; 667 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 668 } 669 return ERROR_CODE_SUCCESS; 670 } 671 672 uint8_t avrcp_target_battery_status_changed(uint16_t avrcp_cid, avrcp_battery_status_t battery_status){ 673 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 674 if (!connection){ 675 log_error("avrcp_unit_info: could not find a connection."); 676 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 677 } 678 if (connection->battery_status == battery_status) return ERROR_CODE_SUCCESS; 679 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED)) { 680 connection->battery_status = battery_status; 681 connection->battery_status_changed = 1; 682 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 683 } 684 return ERROR_CODE_SUCCESS; 685 } 686 687 uint8_t avrcp_target_volume_changed(uint16_t avrcp_cid, uint8_t volume_percentage){ 688 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 689 if (!connection){ 690 log_error("avrcp_unit_info: could not find a connection."); 691 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 692 } 693 if (connection->volume_percentage == volume_percentage) return ERROR_CODE_SUCCESS; 694 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED )) { 695 connection->volume_percentage = volume_percentage; 696 connection->volume_percentage_changed = 1; 697 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 698 } 699 return ERROR_CODE_SUCCESS; 700 } 701 702 703 static uint8_t * avrcp_get_company_id(uint8_t *packet, uint16_t size){ 704 UNUSED(size); 705 return packet + 6; 706 } 707 708 static uint8_t * avrcp_get_pdu(uint8_t *packet, uint16_t size){ 709 UNUSED(size); 710 return packet + 9; 711 } 712 713 static uint8_t avrcp_is_receive_pass_through_cmd(uint8_t operation_id){ 714 return operation_id & 0x80; 715 } 716 717 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 718 UNUSED(connection); 719 UNUSED(packet); 720 UNUSED(size); 721 722 // uint8_t opcode; 723 724 uint8_t transport_header = packet[0]; 725 connection->transaction_label = transport_header >> 4; 726 // uint8_t packet_type = (transport_header & 0x0F) >> 2; 727 // uint8_t frame_type = (transport_header & 0x03) >> 1; 728 // uint8_t ipid = transport_header & 0x01; 729 // uint8_t byte_value = packet[2]; 730 // uint16_t pid = (byte_value << 8) | packet[2]; 731 // avrcp_command_type_t ctype = (avrcp_command_type_t) packet[3]; 732 // uint8_t byte_value = packet[4]; 733 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (packet[4] >> 3); 734 avrcp_subunit_id_t subunit_id = (avrcp_subunit_id_t) (packet[4] & 0x07); 735 // opcode = packet[pos++]; 736 737 // printf(" Transport header 0x%02x (transaction_label %d, packet_type %d, frame_type %d, ipid %d), pid 0x%4x\n", 738 // transport_header, transaction_label, packet_type, frame_type, ipid, pid); 739 // printf_hexdump(packet+pos, size-pos); 740 741 avrcp_command_opcode_t opcode = avrcp_cmd_opcode(packet,size); 742 uint8_t * company_id = avrcp_get_company_id(packet, size); 743 uint8_t * pdu = avrcp_get_pdu(packet, size); 744 // uint16_t param_length = big_endian_read_16(pdu, 2); 745 746 int pos = 4; 747 uint8_t pdu_id; 748 connection->cmd_operands_length = 0; 749 750 switch (opcode){ 751 case AVRCP_CMD_OPCODE_UNIT_INFO: 752 avrcp_target_unit_info(connection); 753 break; 754 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 755 uint8_t offset = 4 * (packet[pos+2]>>4); 756 avrcp_target_subunit_info(connection, offset); 757 break; 758 } 759 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 760 log_info("AVRCP_OPERATION_ID 0x%02x, operands length %d, operand %d", packet[6], packet[7], packet[8]); 761 avrcp_operation_id_t operation_id = packet[6]; 762 763 if (avrcp_is_receive_pass_through_cmd(operation_id)){ 764 operation_id = packet[6] & 0x7F; 765 avrcp_target_operation_accepted(connection->avrcp_cid, packet[6], packet[7], packet[8]); 766 break; 767 } 768 769 switch (operation_id){ 770 case AVRCP_OPERATION_ID_PLAY: 771 case AVRCP_OPERATION_ID_PAUSE: 772 case AVRCP_OPERATION_ID_STOP: 773 case AVRCP_OPERATION_ID_VOLUME_UP: 774 case AVRCP_OPERATION_ID_VOLUME_DOWN: 775 case AVRCP_OPERATION_ID_REWIND: 776 case AVRCP_OPERATION_ID_FAST_FORWARD: 777 case AVRCP_OPERATION_ID_FORWARD: 778 case AVRCP_OPERATION_ID_BACKWARD: 779 case AVRCP_OPERATION_ID_SKIP: 780 case AVRCP_OPERATION_ID_MUTE: 781 case AVRCP_OPERATION_ID_CHANNEL_UP: 782 case AVRCP_OPERATION_ID_CHANNEL_DOWN: 783 case AVRCP_OPERATION_ID_SELECT: 784 case AVRCP_OPERATION_ID_UP: 785 case AVRCP_OPERATION_ID_DOWN: 786 case AVRCP_OPERATION_ID_LEFT: 787 case AVRCP_OPERATION_ID_RIGHT: 788 case AVRCP_OPERATION_ID_ROOT_MENU: 789 printf("received op 0x%02x\n", operation_id); 790 avrcp_target_operation_accepted(connection->avrcp_cid, packet[6], packet[7], packet[8]); 791 avrcp_target_emit_operation(avrcp_target_context.avrcp_callback, connection->avrcp_cid, operation_id, packet[7], packet[8]); 792 break; 793 case AVRCP_OPERATION_ID_UNDEFINED: 794 avrcp_target_operation_not_implemented(connection->avrcp_cid, packet[6], packet[7], packet[8]); 795 return; 796 default: 797 avrcp_target_operation_not_implemented(connection->avrcp_cid, packet[6], packet[7], packet[8]); 798 return; 799 } 800 break; 801 } 802 803 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 804 pdu_id = pdu[0]; 805 // 1 - reserved 806 // 2-3 param length, 807 memcpy(connection->cmd_operands, company_id, 3); 808 connection->cmd_operands_length = 3; 809 switch (pdu_id){ 810 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 811 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) pdu[pos]; 812 switch (capability_id){ 813 case AVRCP_CAPABILITY_ID_EVENT: 814 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_EVENT_IDS_QUERY); 815 break; 816 case AVRCP_CAPABILITY_ID_COMPANY: 817 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_COMPANY_IDS_QUERY); 818 break; 819 default: 820 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 821 break; 822 } 823 break; 824 } 825 case AVRCP_PDU_ID_GET_PLAY_STATUS: 826 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_PLAY_STATUS_QUERY); 827 break; 828 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 829 connection->cmd_operands[0] = pdu[4]; 830 connection->abort_continue_response = 1; 831 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 832 break; 833 case AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE: 834 if (pdu[4] != AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES){ 835 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 836 return; 837 } 838 connection->now_playing_info_response = 1; 839 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 840 break; 841 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 842 uint8_t play_identifier[8]; 843 memset(play_identifier, 0, 8); 844 if (memcmp(pdu+pos, play_identifier, 8) != 0) { 845 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 846 return; 847 } 848 pos += 8; 849 uint8_t attribute_count = pdu[pos++]; 850 // printf("AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES attribute count %d\n", attribute_count); 851 connection->next_attr_id = AVRCP_MEDIA_ATTR_NONE; 852 if (!attribute_count){ 853 connection->now_playing_info_attr_bitmap = 0xFE; 854 } else { 855 int i; 856 connection->now_playing_info_attr_bitmap = 0; 857 for (i=0; i < attribute_count; i++){ 858 uint16_t attr_id = big_endian_read_16(pdu, pos); 859 pos += 2; 860 connection->now_playing_info_attr_bitmap |= (1 << attr_id); 861 } 862 } 863 log_info("now_playing_info_attr_bitmap 0x%02x", connection->now_playing_info_attr_bitmap); 864 avrcp_target_now_playing_info(connection); 865 break; 866 } 867 case AVRCP_PDU_ID_REGISTER_NOTIFICATION:{ 868 // 0 - pdu id 869 // 1 - reserved 870 // 2-3 param length 871 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) pdu[4]; 872 uint16_t event_mask = (1 << event_id); 873 874 switch (event_id){ 875 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED: 876 connection->notifications_enabled |= event_mask; 877 if (connection->track_selected){ 878 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_SELECTED, 8); 879 } else { 880 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_NOT_SELECTED, 8); 881 } 882 break; 883 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED: 884 connection->notifications_enabled |= event_mask; 885 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->playback_status, 1); 886 break; 887 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED: 888 connection->notifications_enabled |= event_mask; 889 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, NULL, 0); 890 break; 891 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED: 892 connection->notifications_enabled |= event_mask; 893 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->volume_percentage, 1); 894 break; 895 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED: 896 connection->notifications_enabled |= event_mask; 897 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->battery_status, 1); 898 break; 899 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED: 900 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 901 case AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED: 902 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED: 903 avrcp_target_response_not_implemented(connection, subunit_type, subunit_id, opcode, pdu_id, event_id); 904 return; 905 default: 906 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 907 return; 908 } 909 break; 910 } 911 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME: { 912 uint16_t param_length = big_endian_read_16(pdu,2); 913 if (param_length != 1){ 914 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 915 printf("param_length is %d != 1 \n", param_length); 916 break; 917 } 918 919 uint8_t absolute_volume = pdu[4]; 920 if (absolute_volume > 0x7F){ 921 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 922 printf("absolute_volume %d > 127 \n", absolute_volume); 923 break; 924 } 925 connection->volume_percentage = absolute_volume; 926 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, absolute_volume); 927 break; 928 } 929 default: 930 log_info("AVRCP target: unhandled pdu id 0x%02x", pdu_id); 931 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 932 break; 933 } 934 break; 935 default: 936 log_info("AVRCP target: opcode 0x%02x not implemented", avrcp_cmd_opcode(packet,size)); 937 break; 938 } 939 } 940 941 static int avrcp_target_send_notification(uint16_t cid, avrcp_connection_t * connection, uint8_t notification_id, uint8_t * value, uint16_t value_len){ 942 if (!connection){ 943 log_error("avrcp tartget: could not find a connection."); 944 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 945 } 946 947 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 948 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 949 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 950 connection->subunit_id = AVRCP_SUBUNIT_ID; 951 952 uint16_t pos = 0; 953 l2cap_reserve_packet_buffer(); 954 uint8_t * packet = l2cap_get_outgoing_buffer(); 955 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 956 957 connection->packet_type = AVRCP_SINGLE_PACKET; 958 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 959 // Profile IDentifier (PID) 960 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 961 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 962 963 // command_type 964 packet[pos++] = connection->command_type; 965 // subunit_type | subunit ID 966 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 967 // opcode 968 packet[pos++] = (uint8_t)connection->command_opcode; 969 970 // company id is 3 bytes long 971 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 972 pos += 3; 973 974 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 975 packet[pos++] = 0; 976 uint16_t remainig_outgoing_buffer_size = size > (value_len + 2 + 1) ? size - (value_len + 2 + 1): 0; 977 uint16_t caped_value_len = value_len > remainig_outgoing_buffer_size ? remainig_outgoing_buffer_size : value_len; 978 big_endian_store_16(packet, pos, caped_value_len); 979 pos += 2; 980 packet[pos++] = notification_id; 981 982 memcpy(packet+pos, value, caped_value_len); 983 pos += caped_value_len; 984 connection->wait_to_send = 0; 985 return l2cap_send_prepared(cid, pos); 986 } 987 988 static void avrcp_target_reset_notification(avrcp_connection_t * connection, uint8_t notification_id){ 989 if (!connection){ 990 log_error("avrcp tartget: could not find a connection."); 991 return; 992 } 993 connection->notifications_enabled &= ~(1 << notification_id); 994 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 995 996 } 997 998 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 999 avrcp_connection_t * connection; 1000 switch (packet_type) { 1001 case L2CAP_DATA_PACKET: 1002 connection = get_avrcp_connection_for_l2cap_signaling_cid(channel, &avrcp_target_context); 1003 if (!connection) break; 1004 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1005 break; 1006 case HCI_EVENT_PACKET: 1007 switch (hci_event_packet_get_type(packet)){ 1008 case L2CAP_EVENT_CAN_SEND_NOW:{ 1009 connection = get_avrcp_connection_for_l2cap_signaling_cid(channel, &avrcp_target_context); 1010 if (!connection) { 1011 log_error("Connection not found\n"); 1012 break; 1013 } 1014 1015 if (connection->abort_continue_response){ 1016 connection->abort_continue_response = 0; 1017 connection->now_playing_info_response = 0; 1018 avrcp_target_abort_continue_response(connection->l2cap_signaling_cid, connection); 1019 break; 1020 } 1021 1022 if (connection->now_playing_info_response){ 1023 connection->now_playing_info_response = 0; 1024 avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1025 break; 1026 } 1027 1028 if (connection->track_changed){ 1029 connection->track_changed = 0; 1030 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, connection->track_id, 8); 1031 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1032 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1033 break; 1034 } 1035 1036 if (connection->playback_status_changed){ 1037 connection->playback_status_changed = 0; 1038 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, &connection->playback_status_changed, 1); 1039 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 1040 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1041 break; 1042 } 1043 1044 if (connection->playing_content_changed){ 1045 connection->playing_content_changed = 0; 1046 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED, NULL, 0); 1047 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 1048 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1049 break; 1050 } 1051 1052 if (connection->battery_status_changed){ 1053 connection->battery_status_changed = 0; 1054 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED, (uint8_t *)&connection->battery_status, 1); 1055 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 1056 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1057 break; 1058 } 1059 1060 if (connection->volume_percentage_changed){ 1061 connection->volume_percentage_changed = 0; 1062 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED, &connection->volume_percentage, 1); 1063 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 1064 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1065 break; 1066 } 1067 1068 switch (connection->state){ 1069 case AVCTP_W2_SEND_RESPONSE: 1070 connection->state = AVCTP_CONNECTION_OPENED; 1071 // if (connection->now_playing_info_response){ 1072 // connection->now_playing_info_response = 0; 1073 // avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1074 // break; 1075 // } 1076 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1077 break; 1078 default: 1079 return; 1080 } 1081 break; 1082 } 1083 default: 1084 avrcp_packet_handler(packet_type, channel, packet, size, &avrcp_target_context); 1085 break; 1086 } 1087 default: 1088 break; 1089 } 1090 } 1091 1092 void avrcp_target_init(void){ 1093 avrcp_target_context.role = AVRCP_TARGET; 1094 avrcp_target_context.connections = NULL; 1095 avrcp_target_context.packet_handler = avrcp_target_packet_handler; 1096 l2cap_register_service(&avrcp_target_packet_handler, BLUETOOTH_PROTOCOL_AVCTP, 0xffff, LEVEL_0); 1097 } 1098 1099 void avrcp_target_register_packet_handler(btstack_packet_handler_t callback){ 1100 if (callback == NULL){ 1101 log_error("avrcp_register_packet_handler called with NULL callback"); 1102 return; 1103 } 1104 avrcp_target_context.avrcp_callback = callback; 1105 } 1106 1107 uint8_t avrcp_target_connect(bd_addr_t bd_addr, uint16_t * avrcp_cid){ 1108 return avrcp_connect(bd_addr, &avrcp_target_context, avrcp_cid); 1109 } 1110 1111 uint8_t avrcp_target_disconnect(uint16_t avrcp_cid){ 1112 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_target_context); 1113 if (!connection){ 1114 log_error("avrcp_get_capabilities: could not find a connection."); 1115 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1116 } 1117 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1118 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1119 return ERROR_CODE_SUCCESS; 1120 } 1121 1122