1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp_target.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <inttypes.h> 45 46 #include "btstack.h" 47 #include "classic/avrcp.h" 48 49 #define AVRCP_ATTR_HEADER_LEN 8 50 51 static const uint8_t AVRCP_NOTIFICATION_TRACK_SELECTED[] = {0,0,0,0,0,0,0,0}; 52 static const uint8_t AVRCP_NOTIFICATION_TRACK_NOT_SELECTED[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; 53 54 avrcp_context_t avrcp_target_context; 55 56 static int avrcp_target_supports_browsing(uint16_t target_supported_features){ 57 return target_supported_features & (1 << AVRCP_TARGET_SUPPORTED_FEATURE_BROWSING); 58 } 59 60 void avrcp_target_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 61 avrcp_create_sdp_record(0, service, service_record_handle, avrcp_target_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 62 } 63 64 static void avrcp_target_emit_operation(btstack_packet_handler_t callback, uint16_t avrcp_cid, avrcp_operation_id_t operation_id, uint8_t operands_length, uint8_t operand){ 65 if (!callback) return; 66 uint8_t event[8]; 67 int pos = 0; 68 event[pos++] = HCI_EVENT_AVRCP_META; 69 event[pos++] = sizeof(event) - 2; 70 event[pos++] = AVRCP_SUBEVENT_OPERATION; 71 little_endian_store_16(event, pos, avrcp_cid); 72 pos += 2; 73 event[pos++] = operation_id; 74 event[pos++] = operands_length; 75 event[pos++] = operand; 76 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 77 } 78 79 static void avrcp_target_emit_volume_changed(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t absolute_volume){ 80 if (!callback) return; 81 uint8_t event[7]; 82 int offset = 0; 83 event[offset++] = HCI_EVENT_AVRCP_META; 84 event[offset++] = sizeof(event) - 2; 85 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 86 little_endian_store_16(event, offset, avrcp_cid); 87 offset += 2; 88 event[offset++] = AVRCP_CTYPE_NOTIFY; 89 event[offset++] = absolute_volume; 90 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 91 } 92 93 static void avrcp_target_emit_respond_vendor_dependent_query(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t subevent_id){ 94 if (!callback) return; 95 uint8_t event[5]; 96 int pos = 0; 97 event[pos++] = HCI_EVENT_AVRCP_META; 98 event[pos++] = sizeof(event) - 2; 99 event[pos++] = subevent_id; 100 little_endian_store_16(event, pos, avrcp_cid); 101 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 102 } 103 104 // returns number of bytes stored 105 static uint16_t avrcp_target_pack_single_element_header(uint8_t * packet, uint16_t pos, avrcp_media_attribute_id_t attr_id, uint16_t attr_value_size){ 106 btstack_assert(attr_id >= 1); 107 btstack_assert(attr_id <= AVRCP_MEDIA_ATTR_COUNT); 108 109 big_endian_store_32(packet, pos, attr_id); 110 big_endian_store_16(packet, pos+4, RFC2978_CHARSET_MIB_UTF8); 111 big_endian_store_16(packet, pos+6, attr_value_size); 112 return 8; 113 } 114 115 // returns number of bytes stored 116 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){ 117 uint16_t attr_value_length = sprintf((char *)(packet+pos+8), "%0" PRIu32, value); 118 (void) avrcp_target_pack_single_element_header(packet, pos, attr_id, attr_value_length); 119 return 8 + attr_value_length; 120 } 121 122 // returns number of bytes stored 123 static uint16_t avrcp_target_pack_single_element_attribute_string_fragment(uint8_t * packet, uint16_t pos, avrcp_media_attribute_id_t attr_id, uint8_t * attr_value, uint16_t attr_value_to_copy, uint16_t attr_value_size, bool header){ 124 if (attr_value_size == 0) return 0; 125 uint16_t bytes_stored = 0; 126 if (header){ 127 bytes_stored += avrcp_target_pack_single_element_header(packet, pos, attr_id, attr_value_size); 128 } 129 (void)memcpy(packet + pos + bytes_stored, attr_value, attr_value_to_copy); 130 bytes_stored += attr_value_to_copy; 131 return bytes_stored; 132 } 133 134 static int avrcp_target_abort_continue_response(uint16_t cid, avrcp_connection_t * connection){ 135 uint16_t pos = 0; 136 l2cap_reserve_packet_buffer(); 137 uint8_t * packet = l2cap_get_outgoing_buffer(); 138 139 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 140 connection->command_type = AVRCP_CTYPE_RESPONSE_ACCEPTED; 141 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 142 connection->subunit_id = AVRCP_SUBUNIT_ID; 143 144 packet[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 145 // Profile IDentifier (PID) 146 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 147 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 148 149 // command_type 150 packet[pos++] = connection->command_type; 151 // subunit_type | subunit ID 152 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 153 // opcode 154 packet[pos++] = (uint8_t)connection->command_opcode; 155 156 // company id is 3 bytes long 157 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 158 pos += 3; 159 160 packet[pos++] = AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE; 161 162 // reserve byte for packet type 163 packet[pos++] = AVRCP_SINGLE_PACKET; 164 big_endian_store_16(packet, pos, 0); 165 pos += 2; 166 return l2cap_send_prepared(cid, pos); 167 } 168 169 static int avrcp_target_send_now_playing_info(uint16_t cid, avrcp_connection_t * connection){ 170 uint16_t pos = 0; 171 l2cap_reserve_packet_buffer(); 172 uint8_t * packet = l2cap_get_outgoing_buffer(); 173 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 174 175 packet[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 176 // Profile IDentifier (PID) 177 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 178 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 179 180 // command_type 181 packet[pos++] = connection->command_type; 182 // subunit_type | subunit ID 183 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 184 // opcode 185 packet[pos++] = (uint8_t)connection->command_opcode; 186 187 // company id is 3 bytes long 188 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 189 pos += 3; 190 191 packet[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 192 193 // reserve byte for packet type 194 uint8_t pos_packet_type = pos; 195 pos++; 196 197 uint16_t playing_info_buffer_len_position = pos; 198 pos += 2; 199 // printf("connection->next_attr_id %d \n", connection->next_attr_id); 200 if (connection->next_attr_id == AVRCP_MEDIA_ATTR_NONE){ 201 packet[pos_packet_type] = AVRCP_SINGLE_PACKET; 202 connection->packet_type = AVRCP_SINGLE_PACKET; 203 packet[pos++] = count_set_bits_uint32(connection->now_playing_info_attr_bitmap); 204 connection->next_attr_id = AVRCP_MEDIA_ATTR_ALL; 205 } 206 // printf("updated connection->next_attr_id %d, connection->attribute_value_offset %d \n", connection->next_attr_id, connection->attribute_value_offset); 207 208 uint8_t fragmented = 0; 209 int num_free_bytes = size - pos - 2; 210 uint8_t MAX_NUMBER_ATTR_LEN = 10; 211 212 while (!fragmented && (num_free_bytes > 0) && (connection->next_attr_id <= AVRCP_MEDIA_ATTR_SONG_LENGTH_MS)){ 213 avrcp_media_attribute_id_t attr_id = connection->next_attr_id; 214 int attr_index = attr_id - 1; 215 216 if (connection->now_playing_info_attr_bitmap & (1 << attr_id)){ 217 int num_written_bytes = 0; 218 int num_bytes_to_write = 0; 219 switch (attr_id){ 220 case AVRCP_MEDIA_ATTR_ALL: 221 case AVRCP_MEDIA_ATTR_NONE: 222 break; 223 case AVRCP_MEDIA_ATTR_TRACK: 224 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 225 if (num_free_bytes >= num_bytes_to_write){ 226 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->track_nr); 227 break; 228 } 229 fragmented = 1; 230 connection->attribute_value_offset = 0; 231 break; 232 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 233 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 234 if (num_free_bytes >= num_bytes_to_write){ 235 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->total_tracks); 236 break; 237 } 238 fragmented = 1; 239 connection->attribute_value_offset = 0; 240 break; 241 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 242 num_bytes_to_write = AVRCP_ATTR_HEADER_LEN + MAX_NUMBER_ATTR_LEN; 243 if (num_free_bytes >= num_bytes_to_write){ 244 num_written_bytes = avrcp_target_pack_single_element_attribute_number(packet, pos, attr_id, connection->song_length_ms); 245 break; 246 } 247 fragmented = 1; 248 connection->attribute_value_offset = 0; 249 break; 250 default:{ 251 bool header = connection->attribute_value_offset == 0; 252 uint8_t * attr_value = (uint8_t *) (connection->now_playing_info[attr_index].value + connection->attribute_value_offset); 253 uint16_t attr_value_len = connection->now_playing_info[attr_index].len - connection->attribute_value_offset; 254 255 num_bytes_to_write = attr_value_len + (header * AVRCP_ATTR_HEADER_LEN); 256 if (num_bytes_to_write <= num_free_bytes){ 257 connection->attribute_value_offset = 0; 258 num_written_bytes = num_bytes_to_write; 259 avrcp_target_pack_single_element_attribute_string_fragment(packet, pos, attr_id, attr_value, attr_value_len, connection->now_playing_info[attr_index].len, header); 260 break; 261 } 262 fragmented = 1; 263 num_written_bytes = num_free_bytes; 264 attr_value_len = num_free_bytes - (header * AVRCP_ATTR_HEADER_LEN); 265 avrcp_target_pack_single_element_attribute_string_fragment(packet, pos, attr_id, attr_value, attr_value_len, connection->now_playing_info[attr_index].len, header); 266 connection->attribute_value_offset += attr_value_len; 267 break; 268 } 269 } 270 pos += num_written_bytes; 271 num_free_bytes -= num_written_bytes; 272 } 273 if (!fragmented){ 274 // C++ compatible version of connection->next_attr_id++ 275 connection->next_attr_id = (avrcp_media_attribute_id_t) (((int) connection->next_attr_id) + 1); 276 } 277 } 278 279 if (fragmented){ 280 switch (connection->packet_type){ 281 case AVRCP_SINGLE_PACKET: 282 connection->packet_type = AVRCP_START_PACKET; 283 break; 284 default: 285 connection->packet_type = AVRCP_CONTINUE_PACKET; 286 break; 287 } 288 } else { 289 if (connection->next_attr_id >= AVRCP_MEDIA_ATTR_SONG_LENGTH_MS){ // DONE 290 if (connection->packet_type != AVRCP_SINGLE_PACKET){ 291 connection->packet_type = AVRCP_END_PACKET; 292 } 293 } 294 } 295 packet[pos_packet_type] = connection->packet_type; 296 // store attr value length 297 big_endian_store_16(packet, playing_info_buffer_len_position, pos - playing_info_buffer_len_position - 2); 298 return l2cap_send_prepared(cid, size); 299 } 300 301 302 303 static int avrcp_target_send_response(uint16_t cid, avrcp_connection_t * connection){ 304 int pos = 0; 305 l2cap_reserve_packet_buffer(); 306 uint8_t * packet = l2cap_get_outgoing_buffer(); 307 308 // transport header 309 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 310 311 // TODO: check for fragmentation 312 connection->packet_type = AVRCP_SINGLE_PACKET; 313 314 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 315 // Profile IDentifier (PID) 316 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 317 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 318 // command_type 319 packet[pos++] = connection->command_type; 320 // subunit_type | subunit ID 321 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 322 // opcode 323 packet[pos++] = (uint8_t)connection->command_opcode; 324 325 // if (connection->command_opcode == AVRCP_CMD_OPCODE_VENDOR_DEPENDENT){ 326 // // company id is 3 bytes long 327 // big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 328 // pos += 3; 329 // } 330 // operands 331 (void)memcpy(packet + pos, connection->cmd_operands, 332 connection->cmd_operands_length); 333 pos += connection->cmd_operands_length; 334 // printf(" pos to send %d\n", pos); 335 // printf_hexdump(packet, pos); 336 337 connection->wait_to_send = 0; 338 return l2cap_send_prepared(cid, pos); 339 } 340 341 static uint8_t avrcp_target_response_accept(avrcp_connection_t * connection, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, uint8_t status){ 342 // AVRCP_CTYPE_RESPONSE_REJECTED 343 connection->command_type = AVRCP_CTYPE_RESPONSE_ACCEPTED; 344 connection->subunit_type = subunit_type; 345 connection->subunit_id = subunit_id; 346 connection->command_opcode = opcode; 347 // company id is 3 bytes long 348 int pos = connection->cmd_operands_length; 349 connection->cmd_operands[pos++] = pdu_id; 350 connection->cmd_operands[pos++] = 0; 351 // param length 352 big_endian_store_16(connection->cmd_operands, pos, 1); 353 pos += 2; 354 connection->cmd_operands[pos++] = status; 355 connection->cmd_operands_length = pos; 356 connection->accept_response = 1; 357 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 358 return ERROR_CODE_SUCCESS; 359 } 360 361 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){ 362 // AVRCP_CTYPE_RESPONSE_REJECTED 363 connection->command_type = AVRCP_CTYPE_RESPONSE_REJECTED; 364 connection->subunit_type = subunit_type; 365 connection->subunit_id = subunit_id; 366 connection->command_opcode = opcode; 367 // company id is 3 bytes long 368 int pos = connection->cmd_operands_length; 369 connection->cmd_operands[pos++] = pdu_id; 370 connection->cmd_operands[pos++] = 0; 371 // param length 372 big_endian_store_16(connection->cmd_operands, pos, 1); 373 pos += 2; 374 connection->cmd_operands[pos++] = status; 375 connection->cmd_operands_length = pos; 376 connection->state = AVCTP_W2_SEND_RESPONSE; 377 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 378 return ERROR_CODE_SUCCESS; 379 } 380 381 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){ 382 connection->command_type = AVRCP_CTYPE_RESPONSE_NOT_IMPLEMENTED; 383 connection->subunit_type = subunit_type; 384 connection->subunit_id = subunit_id; 385 connection->command_opcode = opcode; 386 387 // company id is 3 bytes long 388 int pos = connection->cmd_operands_length; 389 connection->cmd_operands[pos++] = pdu_id; 390 connection->cmd_operands[pos++] = 0; 391 // param length 392 big_endian_store_16(connection->cmd_operands, pos, 1); 393 pos += 2; 394 connection->cmd_operands[pos++] = event_id; 395 connection->cmd_operands_length = pos; 396 397 connection->state = AVCTP_W2_SEND_RESPONSE; 398 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 399 return ERROR_CODE_SUCCESS; 400 } 401 402 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, 403 avrcp_command_opcode_t opcode, avrcp_pdu_id_t pdu_id, uint8_t event_id, const uint8_t * value, uint16_t value_len){ 404 connection->command_type = AVRCP_CTYPE_RESPONSE_INTERIM; 405 connection->subunit_type = subunit_type; 406 connection->subunit_id = subunit_id; 407 connection->command_opcode = opcode; 408 409 // company id is 3 bytes long 410 int pos = connection->cmd_operands_length; 411 connection->cmd_operands[pos++] = pdu_id; 412 connection->cmd_operands[pos++] = 0; 413 // param length 414 big_endian_store_16(connection->cmd_operands, pos, 1 + value_len); 415 pos += 2; 416 connection->cmd_operands[pos++] = event_id; 417 if (value && (value_len > 0)){ 418 (void)memcpy(connection->cmd_operands + pos, value, value_len); 419 pos += value_len; 420 } 421 connection->cmd_operands_length = pos; 422 connection->state = AVCTP_W2_SEND_RESPONSE; 423 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 424 return ERROR_CODE_SUCCESS; 425 } 426 427 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){ 428 connection->command_type = AVRCP_CTYPE_RESPONSE_INTERIM; 429 connection->subunit_type = subunit_type; 430 connection->subunit_id = subunit_id; 431 connection->command_opcode = opcode; 432 433 // company id is 3 bytes long 434 int pos = connection->cmd_operands_length; 435 connection->cmd_operands[pos++] = pdu_id; 436 connection->cmd_operands[pos++] = 0; 437 // param length 438 big_endian_store_16(connection->cmd_operands, pos, 5); 439 pos += 2; 440 connection->cmd_operands[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 441 big_endian_read_16( &connection->cmd_operands[pos], connection->addressed_player_id); 442 pos += 2; 443 big_endian_read_16( &connection->cmd_operands[pos], connection->uid_counter); 444 pos += 2; 445 446 connection->cmd_operands_length = pos; 447 connection->state = AVCTP_W2_SEND_RESPONSE; 448 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 449 return ERROR_CODE_SUCCESS; 450 } 451 452 453 // static uint8_t avrcp_target_response_vendor_dependent_changed(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id, uint8_t event_id){ 454 // connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 455 // connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 456 // connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 457 // connection->subunit_id = AVRCP_SUBUNIT_ID; 458 459 // // company id is 3 bytes long 460 // int pos = connection->cmd_operands_length; 461 // connection->cmd_operands[pos++] = pdu_id; 462 // connection->cmd_operands[pos++] = 0; 463 // // param length 464 // big_endian_store_16(connection->cmd_operands, pos, 1); 465 // pos += 2; 466 // connection->cmd_operands[pos++] = event_id; 467 // connection->cmd_operands_length = pos; 468 469 // connection->state = AVCTP_W2_SEND_RESPONSE; 470 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 471 // return ERROR_CODE_SUCCESS; 472 // } 473 474 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){ 475 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 476 if (!connection){ 477 log_error("Could not find a connection."); 478 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 479 } 480 connection->command_type = cmd_type; 481 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 482 connection->subunit_id = AVRCP_SUBUNIT_ID; 483 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 484 485 int pos = 0; 486 connection->cmd_operands[pos++] = opid; 487 connection->cmd_operands[pos++] = operands_length; 488 if (operands_length == 1){ 489 connection->cmd_operands[pos++] = operand; 490 } 491 connection->cmd_operands_length = pos; 492 493 connection->state = AVCTP_W2_SEND_RESPONSE; 494 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 495 return ERROR_CODE_SUCCESS; 496 } 497 498 uint8_t avrcp_target_operation_rejected(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 499 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_REJECTED, opid, operands_length, operand); 500 } 501 502 uint8_t avrcp_target_operation_accepted(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 503 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 504 } 505 506 uint8_t avrcp_target_operation_not_implemented(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 507 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 508 } 509 510 void avrcp_target_set_unit_info(uint16_t avrcp_cid, avrcp_subunit_type_t unit_type, uint32_t company_id){ 511 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 512 if (!connection){ 513 log_error("avrcp_target_operation_reject: could not find a connection."); 514 return; 515 } 516 connection->unit_type = unit_type; 517 connection->company_id = company_id; 518 } 519 520 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){ 521 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 522 if (!connection){ 523 log_error("avrcp_target_operation_reject: could not find a connection."); 524 return; 525 } 526 connection->subunit_info_type = subunit_type; 527 connection->subunit_info_data = subunit_info_data; 528 connection->subunit_info_data_size = subunit_info_data_size; 529 } 530 531 static uint8_t avrcp_target_unit_info(avrcp_connection_t * connection){ 532 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 533 534 uint8_t unit = 0; 535 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 536 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 537 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 538 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 539 540 connection->cmd_operands_length = 5; 541 connection->cmd_operands[0] = 0x07; 542 connection->cmd_operands[1] = (connection->unit_type << 4) | unit; 543 // company id is 3 bytes long 544 big_endian_store_32(connection->cmd_operands, 2, connection->company_id); 545 546 connection->state = AVCTP_W2_SEND_RESPONSE; 547 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 548 return ERROR_CODE_SUCCESS; 549 } 550 551 552 static uint8_t avrcp_target_subunit_info(avrcp_connection_t * connection, uint8_t offset){ 553 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 554 if ((offset - 4) > connection->subunit_info_data_size) return AVRCP_STATUS_INVALID_PARAMETER; 555 556 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 557 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 558 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 559 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 560 // printf("avrcp_target_subunit_info subunit_type %d\n", connection->subunit_type); 561 562 uint8_t page = offset / 4; 563 uint8_t extension_code = 7; 564 connection->cmd_operands_length = 5; 565 connection->cmd_operands[0] = (page << 4) | extension_code; 566 567 (void)memcpy(connection->cmd_operands + 1, 568 connection->subunit_info_data + offset, 4); 569 570 connection->state = AVCTP_W2_SEND_RESPONSE; 571 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 572 return ERROR_CODE_SUCCESS; 573 } 574 575 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){ 576 *out_connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 577 if (!*out_connection){ 578 log_error("avrcp tartget: could not find a connection."); 579 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 580 } 581 582 if ((*out_connection)->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 583 (*out_connection)->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 584 (*out_connection)->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 585 (*out_connection)->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 586 (*out_connection)->subunit_id = AVRCP_SUBUNIT_ID; 587 588 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = pdu_id; 589 // reserved 590 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = 0; 591 // param length 592 big_endian_store_16((*out_connection)->cmd_operands, (*out_connection)->cmd_operands_length, param_length); 593 (*out_connection)->cmd_operands_length += 2; 594 return ERROR_CODE_SUCCESS; 595 } 596 597 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){ 598 avrcp_connection_t * connection = NULL; 599 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_CAPABILITIES, 2+size); 600 if (status != ERROR_CODE_SUCCESS) return status; 601 602 connection->cmd_operands[connection->cmd_operands_length++] = capability_id; 603 connection->cmd_operands[connection->cmd_operands_length++] = capabilities_num; 604 (void)memcpy(connection->cmd_operands + connection->cmd_operands_length, 605 capabilities, size); 606 connection->cmd_operands_length += size; 607 608 connection->state = AVCTP_W2_SEND_RESPONSE; 609 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 610 return ERROR_CODE_SUCCESS; 611 } 612 613 uint8_t avrcp_target_supported_events(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size){ 614 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_EVENT, capabilities_num, capabilities, size); 615 } 616 617 uint8_t avrcp_target_supported_companies(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size ){ 618 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_COMPANY, capabilities_num, capabilities, size); 619 } 620 621 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){ 622 avrcp_connection_t * connection = NULL; 623 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_PLAY_STATUS, 11); 624 if (status != ERROR_CODE_SUCCESS) return status; 625 626 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_length_ms); 627 connection->cmd_operands_length += 4; 628 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_position_ms); 629 connection->cmd_operands_length += 4; 630 connection->cmd_operands[connection->cmd_operands_length++] = play_status; 631 632 connection->state = AVCTP_W2_SEND_RESPONSE; 633 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 634 return ERROR_CODE_SUCCESS; 635 } 636 637 static uint8_t avrcp_target_now_playing_info(avrcp_connection_t * connection){ 638 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 639 connection->now_playing_info_response = 1; 640 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 641 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 642 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 643 connection->subunit_id = AVRCP_SUBUNIT_ID; 644 645 connection->state = AVCTP_W2_SEND_RESPONSE; 646 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 647 return ERROR_CODE_SUCCESS; 648 } 649 650 static uint8_t avrcp_target_store_media_attr(avrcp_connection_t * connection, avrcp_media_attribute_id_t attr_id, const char * value){ 651 int index = attr_id - 1; 652 if (!value) return AVRCP_STATUS_INVALID_PARAMETER; 653 connection->now_playing_info[index].value = (uint8_t*)value; 654 connection->now_playing_info[index].len = strlen(value); 655 // printf("store %lu bytes, %s\n", strlen(value), value); 656 return ERROR_CODE_SUCCESS; 657 } 658 659 uint8_t avrcp_target_set_playback_status(uint16_t avrcp_cid, avrcp_playback_status_t playback_status){ 660 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 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->playback_status == playback_status) return ERROR_CODE_SUCCESS; 666 667 connection->playback_status = playback_status; 668 connection->playback_status_changed = 1; 669 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 670 return ERROR_CODE_SUCCESS; 671 } 672 673 void avrcp_target_set_now_playing_info(uint16_t avrcp_cid, const avrcp_track_t * current_track, uint16_t total_tracks){ 674 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 675 if (!connection){ 676 log_error("avrcp_unit_info: could not find a connection. cid 0x%02x\n", avrcp_cid); 677 return; 678 } 679 if (!current_track){ 680 connection->track_selected = 0; 681 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 682 return; 683 } 684 (void)memcpy(connection->track_id, current_track->track_id, 8); 685 connection->song_length_ms = current_track->song_length_ms; 686 connection->track_nr = current_track->track_nr; 687 connection->total_tracks = total_tracks; 688 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_TITLE, current_track->title); 689 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ARTIST, current_track->artist); 690 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ALBUM, current_track->album); 691 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_GENRE, current_track->genre); 692 connection->track_selected = 1; 693 694 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 695 connection->track_changed = 1; 696 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 697 } 698 return; 699 } 700 701 uint8_t avrcp_target_track_changed(uint16_t avrcp_cid, uint8_t * track_id){ 702 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 703 if (!connection){ 704 log_error("avrcp_target_track_changed: could not find connection."); 705 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 706 } 707 if (!track_id) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 708 709 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 710 connection->track_changed = 1; 711 (void)memcpy(connection->track_id, track_id, 8); 712 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 713 } 714 return ERROR_CODE_SUCCESS; 715 } 716 717 uint8_t avrcp_target_playing_content_changed(uint16_t avrcp_cid){ 718 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 719 if (!connection){ 720 log_error("avrcp_target_playing_content_changed: could not find a connection."); 721 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 722 } 723 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED)) { 724 connection->playing_content_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_addressed_player_changed(uint16_t avrcp_cid, uint16_t player_id, uint16_t uid_counter){ 731 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 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->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED)) { 737 // printf("send AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED\n"); 738 // connection->addressed_player_changed = 1; 739 connection->uid_counter = uid_counter; 740 connection->addressed_player_id = player_id; 741 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 742 } 743 return ERROR_CODE_SUCCESS; 744 } 745 746 uint8_t avrcp_target_battery_status_changed(uint16_t avrcp_cid, avrcp_battery_status_t battery_status){ 747 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 748 if (!connection){ 749 log_error("avrcp_unit_info: could not find a connection."); 750 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 751 } 752 if (connection->battery_status == battery_status) return ERROR_CODE_SUCCESS; 753 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED)) { 754 connection->battery_status = battery_status; 755 connection->battery_status_changed = 1; 756 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 757 } 758 return ERROR_CODE_SUCCESS; 759 } 760 761 uint8_t avrcp_target_volume_changed(uint16_t avrcp_cid, uint8_t volume_percentage){ 762 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 763 if (!connection){ 764 log_error("avrcp_unit_info: could not find a connection."); 765 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 766 } 767 // if (connection->volume_percentage == volume_percentage) return ERROR_CODE_SUCCESS; 768 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED )) { 769 connection->volume_percentage = volume_percentage; 770 connection->notify_volume_percentage_changed = 1; 771 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 772 } 773 return ERROR_CODE_SUCCESS; 774 } 775 776 static void avrcp_target_set_transaction_label_for_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification, uint8_t transaction_label){ 777 if (notification > AVRCP_NOTIFICATION_EVENT_MAX_VALUE) return; 778 connection->notifications_transaction_label[notification] = transaction_label; 779 } 780 781 static uint8_t avrcp_target_get_transaction_label_for_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification){ 782 if (notification > AVRCP_NOTIFICATION_EVENT_MAX_VALUE) return 0; 783 return connection->notifications_transaction_label[notification]; 784 } 785 786 static uint8_t * avrcp_get_company_id(uint8_t *packet, uint16_t size){ 787 UNUSED(size); 788 return packet + 6; 789 } 790 791 static uint8_t * avrcp_get_pdu(uint8_t *packet, uint16_t size){ 792 UNUSED(size); 793 return packet + 9; 794 } 795 796 static uint8_t avrcp_is_receive_pass_through_cmd(uint8_t operation_id){ 797 return operation_id & 0x80; 798 } 799 800 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 801 UNUSED(connection); 802 UNUSED(packet); 803 UNUSED(size); 804 805 // uint8_t opcode; 806 uint16_t pid = 0; 807 uint8_t transport_header = packet[0]; 808 connection->transaction_label = transport_header >> 4; 809 // uint8_t frame_type = (transport_header & 0x03) >> 1; 810 avrcp_packet_type_t packet_type = (avrcp_packet_type_t) ((transport_header & 0x0F) >> 2); 811 switch (packet_type){ 812 case AVRCP_SINGLE_PACKET: 813 pid = big_endian_read_16(packet, 1); 814 break; 815 case AVRCP_START_PACKET: 816 pid = big_endian_read_16(packet, 2); 817 break; 818 default: 819 break; 820 } 821 822 switch (packet_type){ 823 case AVRCP_SINGLE_PACKET: 824 case AVRCP_START_PACKET: 825 if (pid != BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL){ 826 log_info("Invalid pid 0x%02x, expected 0x%02x", connection->invalid_pid, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 827 connection->reject_transport_header = 1; 828 connection->invalid_pid = pid; 829 connection->transport_header = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2 ) | (AVRCP_RESPONSE_FRAME << 1) | 1; 830 connection->state = AVCTP_W2_SEND_RESPONSE; 831 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 832 return; 833 } 834 break; 835 default: 836 break; 837 } 838 839 // avrcp_command_type_t ctype = (avrcp_command_type_t) packet[3]; 840 // uint8_t byte_value = packet[4]; 841 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (packet[4] >> 3); 842 avrcp_subunit_id_t subunit_id = (avrcp_subunit_id_t) (packet[4] & 0x07); 843 // opcode = packet[pos++]; 844 // printf(" Transport header 0x%02x (transaction_label %d, packet_type %d, frame_type %d, ipid %d), pid 0x%4x\n", 845 // transport_header, transaction_label, packet_type, frame_type, ipid, pid); 846 // printf_hexdump(packet+pos, size-pos); 847 848 avrcp_command_opcode_t opcode = (avrcp_command_opcode_t) avrcp_cmd_opcode(packet,size); 849 uint8_t * company_id = avrcp_get_company_id(packet, size); 850 uint8_t * pdu = avrcp_get_pdu(packet, size); 851 // uint16_t param_length = big_endian_read_16(pdu, 2); 852 853 int pos = 4; 854 uint16_t length; 855 avrcp_pdu_id_t pdu_id; 856 connection->cmd_operands_length = 0; 857 858 switch (opcode){ 859 case AVRCP_CMD_OPCODE_UNIT_INFO: 860 avrcp_target_unit_info(connection); 861 break; 862 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 863 uint8_t offset = 4 * (packet[pos+2]>>4); 864 avrcp_target_subunit_info(connection, offset); 865 break; 866 } 867 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 868 log_info("AVRCP_OPERATION_ID 0x%02x, operands length %d, operand %d", packet[6], packet[7], packet[8]); 869 avrcp_operation_id_t operation_id = (avrcp_operation_id_t) packet[6]; 870 871 if (avrcp_is_receive_pass_through_cmd(operation_id)){ 872 operation_id = (avrcp_operation_id_t) (packet[6] & 0x7F); 873 avrcp_target_operation_accepted(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 874 break; 875 } 876 877 switch (operation_id){ 878 case AVRCP_OPERATION_ID_PLAY: 879 case AVRCP_OPERATION_ID_PAUSE: 880 case AVRCP_OPERATION_ID_STOP: 881 case AVRCP_OPERATION_ID_VOLUME_UP: 882 case AVRCP_OPERATION_ID_VOLUME_DOWN: 883 case AVRCP_OPERATION_ID_REWIND: 884 case AVRCP_OPERATION_ID_FAST_FORWARD: 885 case AVRCP_OPERATION_ID_FORWARD: 886 case AVRCP_OPERATION_ID_BACKWARD: 887 case AVRCP_OPERATION_ID_SKIP: 888 case AVRCP_OPERATION_ID_MUTE: 889 case AVRCP_OPERATION_ID_CHANNEL_UP: 890 case AVRCP_OPERATION_ID_CHANNEL_DOWN: 891 case AVRCP_OPERATION_ID_SELECT: 892 case AVRCP_OPERATION_ID_UP: 893 case AVRCP_OPERATION_ID_DOWN: 894 case AVRCP_OPERATION_ID_LEFT: 895 case AVRCP_OPERATION_ID_RIGHT: 896 case AVRCP_OPERATION_ID_ROOT_MENU: 897 avrcp_target_operation_accepted(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 898 avrcp_target_emit_operation(avrcp_target_context.avrcp_callback, connection->avrcp_cid, operation_id, packet[7], packet[8]); 899 break; 900 case AVRCP_OPERATION_ID_UNDEFINED: 901 avrcp_target_operation_not_implemented(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 902 return; 903 default: 904 avrcp_target_operation_not_implemented(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 905 return; 906 } 907 break; 908 } 909 910 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 911 pdu_id = (avrcp_pdu_id_t) pdu[0]; 912 // 1 - reserved 913 // 2-3 param length, 914 length = big_endian_read_16(pdu, 2); 915 (void)memcpy(connection->cmd_operands, company_id, 3); 916 connection->cmd_operands_length = 3; 917 switch (pdu_id){ 918 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER:{ 919 if (length == 0){ 920 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PLAYER_ID); 921 break; 922 } 923 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_SUCCESS); 924 break; 925 } 926 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 927 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) pdu[pos]; 928 switch (capability_id){ 929 case AVRCP_CAPABILITY_ID_EVENT: 930 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_EVENT_IDS_QUERY); 931 break; 932 case AVRCP_CAPABILITY_ID_COMPANY: 933 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_COMPANY_IDS_QUERY); 934 break; 935 default: 936 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 937 break; 938 } 939 break; 940 } 941 case AVRCP_PDU_ID_GET_PLAY_STATUS: 942 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_PLAY_STATUS_QUERY); 943 break; 944 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 945 connection->cmd_operands[0] = pdu[4]; 946 connection->abort_continue_response = 1; 947 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 948 break; 949 case AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE: 950 if (pdu[4] != AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES){ 951 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 952 return; 953 } 954 connection->now_playing_info_response = 1; 955 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 956 break; 957 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 958 uint8_t play_identifier[8]; 959 memset(play_identifier, 0, 8); 960 if (memcmp(pdu+pos, play_identifier, 8) != 0) { 961 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 962 return; 963 } 964 pos += 8; 965 uint8_t attribute_count = pdu[pos++]; 966 // printf("AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES attribute count %d\n", attribute_count); 967 connection->next_attr_id = AVRCP_MEDIA_ATTR_NONE; 968 if (!attribute_count){ 969 connection->now_playing_info_attr_bitmap = 0xFE; 970 } else { 971 int i; 972 connection->now_playing_info_attr_bitmap = 0; 973 for (i=0; i < attribute_count; i++){ 974 uint16_t attr_id = big_endian_read_16(pdu, pos); 975 pos += 2; 976 connection->now_playing_info_attr_bitmap |= (1 << attr_id); 977 } 978 } 979 log_info("now_playing_info_attr_bitmap 0x%02x", connection->now_playing_info_attr_bitmap); 980 avrcp_target_now_playing_info(connection); 981 break; 982 } 983 case AVRCP_PDU_ID_REGISTER_NOTIFICATION:{ 984 // 0 - pdu id 985 // 1 - reserved 986 // 2-3 param length 987 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) pdu[4]; 988 uint16_t event_mask = (1 << event_id); 989 avrcp_target_set_transaction_label_for_notification(connection, event_id, connection->transaction_label); 990 991 switch (event_id){ 992 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED: 993 connection->notifications_enabled |= event_mask; 994 if (connection->track_selected){ 995 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_SELECTED, 8); 996 } else { 997 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_NOT_SELECTED, 8); 998 } 999 break; 1000 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED: 1001 connection->notifications_enabled |= event_mask; 1002 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->playback_status, 1); 1003 break; 1004 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED: 1005 connection->notifications_enabled |= event_mask; 1006 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, NULL, 0); 1007 break; 1008 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED: 1009 connection->notify_volume_percentage_changed = 0; 1010 connection->notifications_enabled |= event_mask; 1011 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->volume_percentage, 1); 1012 break; 1013 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED: 1014 connection->notifications_enabled |= event_mask; 1015 avrcp_target_response_vendor_dependent_interim(connection, subunit_type, subunit_id, opcode, pdu_id, event_id, (const uint8_t *)&connection->battery_status, 1); 1016 break; 1017 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED: 1018 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 1019 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED: 1020 avrcp_target_response_not_implemented(connection, subunit_type, subunit_id, opcode, pdu_id, event_id); 1021 return; 1022 case AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED: 1023 connection->notifications_enabled |= event_mask; 1024 avrcp_target_response_addressed_player_changed_interim(connection, subunit_type, subunit_id, opcode, pdu_id); 1025 return; 1026 default: 1027 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 1028 return; 1029 } 1030 break; 1031 } 1032 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME: { 1033 if (length != 1){ 1034 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 1035 break; 1036 } 1037 1038 uint8_t absolute_volume = pdu[4]; 1039 if (absolute_volume < 0x80){ 1040 connection->volume_percentage = absolute_volume; 1041 } 1042 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, connection->volume_percentage); 1043 avrcp_target_emit_volume_changed(avrcp_target_context.avrcp_callback, connection->avrcp_cid, connection->volume_percentage); 1044 // avrcp_target_volume_changed(connection->avrcp_cid, connection->volume_percentage); 1045 break; 1046 } 1047 default: 1048 log_info("AVRCP target: unhandled pdu id 0x%02x", pdu_id); 1049 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 1050 break; 1051 } 1052 break; 1053 default: 1054 log_info("AVRCP target: opcode 0x%02x not implemented", avrcp_cmd_opcode(packet,size)); 1055 break; 1056 } 1057 } 1058 1059 #if 0 1060 static int avrcp_target_send_addressed_player_changed_notification(uint16_t cid, avrcp_connection_t * connection, uint16_t uid, uint16_t uid_counter){ 1061 if (!connection){ 1062 log_error("avrcp tartget: could not find a connection."); 1063 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1064 } 1065 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1066 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 1067 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1068 connection->subunit_id = AVRCP_SUBUNIT_ID; 1069 1070 uint16_t pos = 0; 1071 l2cap_reserve_packet_buffer(); 1072 uint8_t * packet = l2cap_get_outgoing_buffer(); 1073 1074 connection->packet_type = AVRCP_SINGLE_PACKET; 1075 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1076 // Profile IDentifier (PID) 1077 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1078 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1079 1080 // command_type 1081 packet[pos++] = connection->command_type; 1082 // subunit_type | subunit ID 1083 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1084 // opcode 1085 packet[pos++] = (uint8_t)connection->command_opcode; 1086 1087 // company id is 3 bytes long 1088 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1089 pos += 3; 1090 1091 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1092 packet[pos++] = 0; 1093 big_endian_store_16(packet, pos, 5); 1094 pos += 2; 1095 packet[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 1096 big_endian_store_16(packet, pos, uid); 1097 pos += 2; 1098 big_endian_store_16(packet, pos, uid_counter); 1099 pos += 2; 1100 1101 connection->wait_to_send = 0; 1102 return l2cap_send_prepared(cid, pos); 1103 } 1104 #endif 1105 1106 static int avrcp_target_send_notification(uint16_t cid, avrcp_connection_t * connection, avrcp_notification_event_id_t notification_id, uint8_t * value, uint16_t value_len){ 1107 if (!connection){ 1108 log_error("avrcp tartget: could not find a connection."); 1109 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1110 } 1111 1112 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1113 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 1114 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1115 connection->subunit_id = AVRCP_SUBUNIT_ID; 1116 connection->transaction_label = avrcp_target_get_transaction_label_for_notification(connection, notification_id); 1117 1118 uint16_t pos = 0; 1119 l2cap_reserve_packet_buffer(); 1120 uint8_t * packet = l2cap_get_outgoing_buffer(); 1121 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 1122 1123 connection->packet_type = AVRCP_SINGLE_PACKET; 1124 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1125 // Profile IDentifier (PID) 1126 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1127 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1128 1129 // command_type 1130 packet[pos++] = connection->command_type; 1131 // subunit_type | subunit ID 1132 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1133 // opcode 1134 packet[pos++] = (uint8_t)connection->command_opcode; 1135 1136 // company id is 3 bytes long 1137 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1138 pos += 3; 1139 1140 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1141 packet[pos++] = 0; 1142 uint16_t remainig_outgoing_buffer_size = size - pos - 2; 1143 1144 uint16_t caped_value_len = btstack_min(value_len + 1, remainig_outgoing_buffer_size); 1145 big_endian_store_16(packet, pos, caped_value_len); 1146 pos += 2; 1147 packet[pos++] = notification_id; 1148 (void)memcpy(packet + pos, value, caped_value_len - 1); 1149 pos += caped_value_len - 1; 1150 connection->wait_to_send = 0; 1151 return l2cap_send_prepared(cid, pos); 1152 } 1153 1154 static void avrcp_target_reset_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification_id){ 1155 if (!connection){ 1156 log_error("avrcp tartget: could not find a connection."); 1157 return; 1158 } 1159 connection->notifications_enabled &= ~(1 << notification_id); 1160 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1161 avrcp_target_set_transaction_label_for_notification(connection, notification_id, 0); 1162 } 1163 1164 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1165 avrcp_connection_t * connection; 1166 switch (packet_type) { 1167 case L2CAP_DATA_PACKET: 1168 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, channel); 1169 if (!connection) break; 1170 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1171 break; 1172 case HCI_EVENT_PACKET: 1173 switch (hci_event_packet_get_type(packet)){ 1174 case HCI_EVENT_AVRCP_META: 1175 // forward to app 1176 (*avrcp_target_context.avrcp_callback)(packet_type, channel, packet, size); 1177 break; 1178 case L2CAP_EVENT_CAN_SEND_NOW:{ 1179 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, channel); 1180 if (!connection) { 1181 log_error("Connection not found\n"); 1182 break; 1183 } 1184 1185 if (connection->accept_response){ 1186 connection->accept_response = 0; 1187 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1188 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1189 break; 1190 } 1191 if (connection->abort_continue_response){ 1192 connection->abort_continue_response = 0; 1193 connection->now_playing_info_response = 0; 1194 avrcp_target_abort_continue_response(connection->l2cap_signaling_cid, connection); 1195 break; 1196 } 1197 1198 if (connection->now_playing_info_response){ 1199 connection->now_playing_info_response = 0; 1200 avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1201 break; 1202 } 1203 1204 if (connection->track_changed){ 1205 connection->track_changed = 0; 1206 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, connection->track_id, 8); 1207 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1208 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1209 break; 1210 } 1211 1212 if (connection->playback_status_changed){ 1213 connection->playback_status_changed = 0; 1214 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, &connection->playback_status_changed, 1); 1215 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 1216 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1217 break; 1218 } 1219 1220 // if (connection->addressed_player_changed){ 1221 // connection->playback_status_changed = 0; 1222 // avrcp_target_send_addressed_player_changed_notification(connection->l2cap_signaling_cid, connection, connection->addressed_player_id, connection->uid_counter); 1223 // avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED); 1224 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1225 // break; 1226 // } 1227 1228 if (connection->playing_content_changed){ 1229 connection->playing_content_changed = 0; 1230 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED, NULL, 0); 1231 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 1232 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1233 break; 1234 } 1235 1236 if (connection->battery_status_changed){ 1237 connection->battery_status_changed = 0; 1238 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED, (uint8_t *)&connection->battery_status, 1); 1239 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 1240 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1241 break; 1242 } 1243 1244 if (connection->notify_volume_percentage_changed){ 1245 // printf("emit new volume %d\n", connection->volume_percentage); 1246 connection->notify_volume_percentage_changed = 0; 1247 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED, &connection->volume_percentage, 1); 1248 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 1249 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1250 break; 1251 } 1252 1253 if (connection->reject_transport_header){ 1254 connection->state = AVCTP_CONNECTION_OPENED; 1255 connection->reject_transport_header = 0; 1256 l2cap_reserve_packet_buffer(); 1257 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 1258 out_buffer[0] = connection->transport_header; 1259 big_endian_store_16(out_buffer, 1, connection->invalid_pid); 1260 l2cap_send_prepared(connection->l2cap_signaling_cid, 3); 1261 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1262 break; 1263 } 1264 1265 switch (connection->state){ 1266 case AVCTP_W2_SEND_RESPONSE: 1267 connection->state = AVCTP_CONNECTION_OPENED; 1268 // if (connection->now_playing_info_response){ 1269 // connection->now_playing_info_response = 0; 1270 // avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1271 // break; 1272 // } 1273 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1274 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1275 return; 1276 default: 1277 break; 1278 } 1279 1280 break; 1281 } 1282 default: 1283 break; 1284 } 1285 default: 1286 break; 1287 } 1288 } 1289 1290 void avrcp_target_init(void){ 1291 avrcp_init(); 1292 avrcp_target_context.role = AVRCP_TARGET; 1293 avrcp_target_context.packet_handler = avrcp_target_packet_handler; 1294 avrcp_register_target_packet_handler(&avrcp_target_packet_handler); 1295 } 1296 1297 void avrcp_target_register_packet_handler(btstack_packet_handler_t callback){ 1298 if (callback == NULL){ 1299 log_error("avrcp_register_packet_handler called with NULL callback"); 1300 return; 1301 } 1302 avrcp_target_context.avrcp_callback = callback; 1303 } 1304 1305 uint8_t avrcp_target_connect(bd_addr_t bd_addr, uint16_t * avrcp_cid){ 1306 return avrcp_connect(AVRCP_TARGET, bd_addr, &avrcp_target_context, avrcp_cid); 1307 } 1308 1309 uint8_t avrcp_target_disconnect(uint16_t avrcp_cid){ 1310 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 1311 if (!connection){ 1312 log_error("avrcp_target_disconnect: could not find a connection."); 1313 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1314 } 1315 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1316 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1317 return ERROR_CODE_SUCCESS; 1318 } 1319 1320