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 void avrcp_target_response_setup(avrcp_connection_t * connection, avrcp_command_type_t command_type, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, 342 avrcp_command_opcode_t opcode){ 343 connection->command_type = command_type; 344 connection->subunit_type = subunit_type; 345 connection->subunit_id = subunit_id; 346 connection->command_opcode = opcode; 347 } 348 349 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){ 350 // AVRCP_CTYPE_RESPONSE_REJECTED 351 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_ACCEPTED, subunit_type, subunit_id, opcode); 352 // company id is 3 bytes long 353 int pos = connection->cmd_operands_length; 354 connection->cmd_operands[pos++] = pdu_id; 355 connection->cmd_operands[pos++] = 0; 356 // param length 357 big_endian_store_16(connection->cmd_operands, pos, 1); 358 pos += 2; 359 connection->cmd_operands[pos++] = status; 360 connection->cmd_operands_length = pos; 361 connection->accept_response = 1; 362 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 363 return ERROR_CODE_SUCCESS; 364 } 365 366 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){ 367 // AVRCP_CTYPE_RESPONSE_REJECTED 368 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_REJECTED, subunit_type, subunit_id, opcode); 369 // company id is 3 bytes long 370 int pos = connection->cmd_operands_length; 371 connection->cmd_operands[pos++] = pdu_id; 372 connection->cmd_operands[pos++] = 0; 373 // param length 374 big_endian_store_16(connection->cmd_operands, pos, 1); 375 pos += 2; 376 connection->cmd_operands[pos++] = status; 377 connection->cmd_operands_length = pos; 378 connection->state = AVCTP_W2_SEND_RESPONSE; 379 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 380 return ERROR_CODE_SUCCESS; 381 } 382 383 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){ 384 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_NOT_IMPLEMENTED, subunit_type, subunit_id, opcode); 385 // company id is 3 bytes long 386 int pos = connection->cmd_operands_length; 387 connection->cmd_operands[pos++] = pdu_id; 388 connection->cmd_operands[pos++] = 0; 389 // param length 390 big_endian_store_16(connection->cmd_operands, pos, 1); 391 pos += 2; 392 connection->cmd_operands[pos++] = event_id; 393 connection->cmd_operands_length = pos; 394 395 connection->state = AVCTP_W2_SEND_RESPONSE; 396 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 397 return ERROR_CODE_SUCCESS; 398 } 399 400 static uint8_t avrcp_target_response_vendor_dependent_interim(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id, uint8_t event_id, const uint8_t * value, uint16_t value_len){ 401 402 // company id is 3 bytes long 403 int pos = connection->cmd_operands_length; 404 connection->cmd_operands[pos++] = pdu_id; 405 connection->cmd_operands[pos++] = 0; 406 // param length 407 big_endian_store_16(connection->cmd_operands, pos, 1 + value_len); 408 pos += 2; 409 connection->cmd_operands[pos++] = event_id; 410 if (value && (value_len > 0)){ 411 (void)memcpy(connection->cmd_operands + pos, value, value_len); 412 pos += value_len; 413 } 414 connection->cmd_operands_length = pos; 415 connection->state = AVCTP_W2_SEND_RESPONSE; 416 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 417 return ERROR_CODE_SUCCESS; 418 } 419 420 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){ 421 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_INTERIM, subunit_type, subunit_id, opcode); 422 423 // company id is 3 bytes long 424 int pos = connection->cmd_operands_length; 425 connection->cmd_operands[pos++] = pdu_id; 426 connection->cmd_operands[pos++] = 0; 427 // param length 428 big_endian_store_16(connection->cmd_operands, pos, 5); 429 pos += 2; 430 connection->cmd_operands[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 431 big_endian_read_16( &connection->cmd_operands[pos], connection->addressed_player_id); 432 pos += 2; 433 big_endian_read_16( &connection->cmd_operands[pos], connection->uid_counter); 434 pos += 2; 435 436 connection->cmd_operands_length = pos; 437 connection->state = AVCTP_W2_SEND_RESPONSE; 438 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 439 return ERROR_CODE_SUCCESS; 440 } 441 442 443 // static uint8_t avrcp_target_response_vendor_dependent_changed(avrcp_connection_t * connection, avrcp_pdu_id_t pdu_id, uint8_t event_id){ 444 // avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_CHANGED_STABLE, AVRCP_SUBUNIT_TYPE_PANEL, AVRCP_SUBUNIT_ID, AVRCP_CMD_OPCODE_VENDOR_DEPENDENT); 445 // // company id is 3 bytes long 446 // int pos = connection->cmd_operands_length; 447 // connection->cmd_operands[pos++] = pdu_id; 448 // connection->cmd_operands[pos++] = 0; 449 // // param length 450 // big_endian_store_16(connection->cmd_operands, pos, 1); 451 // pos += 2; 452 // connection->cmd_operands[pos++] = event_id; 453 // connection->cmd_operands_length = pos; 454 455 // connection->state = AVCTP_W2_SEND_RESPONSE; 456 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 457 // return ERROR_CODE_SUCCESS; 458 // } 459 460 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){ 461 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 462 if (!connection){ 463 log_error("Could not find a connection."); 464 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 465 } 466 avrcp_target_response_setup(connection, cmd_type, AVRCP_SUBUNIT_TYPE_PANEL, AVRCP_SUBUNIT_ID, AVRCP_CMD_OPCODE_PASS_THROUGH); 467 468 int pos = 0; 469 connection->cmd_operands[pos++] = opid; 470 connection->cmd_operands[pos++] = operands_length; 471 if (operands_length == 1){ 472 connection->cmd_operands[pos++] = operand; 473 } 474 connection->cmd_operands_length = pos; 475 476 connection->state = AVCTP_W2_SEND_RESPONSE; 477 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 478 return ERROR_CODE_SUCCESS; 479 } 480 481 uint8_t avrcp_target_operation_rejected(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 482 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_REJECTED, opid, operands_length, operand); 483 } 484 485 uint8_t avrcp_target_operation_accepted(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 486 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 487 } 488 489 uint8_t avrcp_target_operation_not_implemented(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint8_t operands_length, uint8_t operand){ 490 return avrcp_target_pass_through_response(avrcp_cid, AVRCP_CTYPE_RESPONSE_ACCEPTED, opid, operands_length, operand); 491 } 492 493 void avrcp_target_set_unit_info(uint16_t avrcp_cid, avrcp_subunit_type_t unit_type, uint32_t company_id){ 494 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 495 if (!connection){ 496 log_error("avrcp_target_operation_reject: could not find a connection."); 497 return; 498 } 499 connection->unit_type = unit_type; 500 connection->company_id = company_id; 501 } 502 503 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){ 504 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 505 if (!connection){ 506 log_error("avrcp_target_operation_reject: could not find a connection."); 507 return; 508 } 509 connection->subunit_info_type = subunit_type; 510 connection->subunit_info_data = subunit_info_data; 511 connection->subunit_info_data_size = subunit_info_data_size; 512 } 513 514 static uint8_t avrcp_target_unit_info(avrcp_connection_t * connection){ 515 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 516 517 uint8_t unit = 0; 518 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 519 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 520 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 521 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 522 523 connection->cmd_operands_length = 5; 524 connection->cmd_operands[0] = 0x07; 525 connection->cmd_operands[1] = (connection->unit_type << 4) | unit; 526 // company id is 3 bytes long 527 big_endian_store_32(connection->cmd_operands, 2, connection->company_id); 528 529 connection->state = AVCTP_W2_SEND_RESPONSE; 530 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 531 return ERROR_CODE_SUCCESS; 532 } 533 534 535 static uint8_t avrcp_target_subunit_info(avrcp_connection_t * connection, uint8_t offset){ 536 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 537 if ((offset - 4) > connection->subunit_info_data_size) return AVRCP_STATUS_INVALID_PARAMETER; 538 539 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 540 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 541 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 542 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 543 // printf("avrcp_target_subunit_info subunit_type %d\n", connection->subunit_type); 544 545 uint8_t page = offset / 4; 546 uint8_t extension_code = 7; 547 connection->cmd_operands_length = 5; 548 connection->cmd_operands[0] = (page << 4) | extension_code; 549 550 (void)memcpy(connection->cmd_operands + 1, 551 connection->subunit_info_data + offset, 4); 552 553 connection->state = AVCTP_W2_SEND_RESPONSE; 554 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 555 return ERROR_CODE_SUCCESS; 556 } 557 558 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){ 559 *out_connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 560 if (!*out_connection){ 561 log_error("avrcp tartget: could not find a connection."); 562 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 563 } 564 565 if ((*out_connection)->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 566 (*out_connection)->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 567 (*out_connection)->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 568 (*out_connection)->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 569 (*out_connection)->subunit_id = AVRCP_SUBUNIT_ID; 570 571 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = pdu_id; 572 // reserved 573 (*out_connection)->cmd_operands[(*out_connection)->cmd_operands_length++] = 0; 574 // param length 575 big_endian_store_16((*out_connection)->cmd_operands, (*out_connection)->cmd_operands_length, param_length); 576 (*out_connection)->cmd_operands_length += 2; 577 return ERROR_CODE_SUCCESS; 578 } 579 580 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){ 581 avrcp_connection_t * connection = NULL; 582 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_CAPABILITIES, 2+size); 583 if (status != ERROR_CODE_SUCCESS) return status; 584 585 connection->cmd_operands[connection->cmd_operands_length++] = capability_id; 586 connection->cmd_operands[connection->cmd_operands_length++] = capabilities_num; 587 (void)memcpy(connection->cmd_operands + connection->cmd_operands_length, 588 capabilities, size); 589 connection->cmd_operands_length += size; 590 591 connection->state = AVCTP_W2_SEND_RESPONSE; 592 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 593 return ERROR_CODE_SUCCESS; 594 } 595 596 uint8_t avrcp_target_supported_events(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size){ 597 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_EVENT, capabilities_num, capabilities, size); 598 } 599 600 uint8_t avrcp_target_supported_companies(uint16_t avrcp_cid, uint8_t capabilities_num, uint8_t * capabilities, uint8_t size ){ 601 return avrcp_target_capability(avrcp_cid, AVRCP_CAPABILITY_ID_COMPANY, capabilities_num, capabilities, size); 602 } 603 604 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){ 605 avrcp_connection_t * connection = NULL; 606 uint8_t status = avrcp_prepare_vendor_dependent_response(avrcp_cid, &connection, AVRCP_PDU_ID_GET_PLAY_STATUS, 11); 607 if (status != ERROR_CODE_SUCCESS) return status; 608 609 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_length_ms); 610 connection->cmd_operands_length += 4; 611 big_endian_store_32(connection->cmd_operands, connection->cmd_operands_length, song_position_ms); 612 connection->cmd_operands_length += 4; 613 connection->cmd_operands[connection->cmd_operands_length++] = play_status; 614 615 connection->state = AVCTP_W2_SEND_RESPONSE; 616 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 617 return ERROR_CODE_SUCCESS; 618 } 619 620 static uint8_t avrcp_target_now_playing_info(avrcp_connection_t * connection){ 621 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 622 connection->now_playing_info_response = 1; 623 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 624 connection->command_type = AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE; 625 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 626 connection->subunit_id = AVRCP_SUBUNIT_ID; 627 628 connection->state = AVCTP_W2_SEND_RESPONSE; 629 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 630 return ERROR_CODE_SUCCESS; 631 } 632 633 static uint8_t avrcp_target_store_media_attr(avrcp_connection_t * connection, avrcp_media_attribute_id_t attr_id, const char * value){ 634 int index = attr_id - 1; 635 if (!value) return AVRCP_STATUS_INVALID_PARAMETER; 636 connection->now_playing_info[index].value = (uint8_t*)value; 637 connection->now_playing_info[index].len = strlen(value); 638 // printf("store %lu bytes, %s\n", strlen(value), value); 639 return ERROR_CODE_SUCCESS; 640 } 641 642 uint8_t avrcp_target_set_playback_status(uint16_t avrcp_cid, avrcp_playback_status_t playback_status){ 643 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 644 if (!connection){ 645 log_error("avrcp_unit_info: could not find a connection."); 646 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 647 } 648 if (connection->playback_status == playback_status) return ERROR_CODE_SUCCESS; 649 650 connection->playback_status = playback_status; 651 connection->playback_status_changed = 1; 652 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 653 return ERROR_CODE_SUCCESS; 654 } 655 656 void avrcp_target_set_now_playing_info(uint16_t avrcp_cid, const avrcp_track_t * current_track, uint16_t total_tracks){ 657 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 658 if (!connection){ 659 log_error("avrcp_unit_info: could not find a connection. cid 0x%02x\n", avrcp_cid); 660 return; 661 } 662 if (!current_track){ 663 connection->track_selected = 0; 664 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 665 return; 666 } 667 (void)memcpy(connection->track_id, current_track->track_id, 8); 668 connection->song_length_ms = current_track->song_length_ms; 669 connection->track_nr = current_track->track_nr; 670 connection->total_tracks = total_tracks; 671 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_TITLE, current_track->title); 672 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ARTIST, current_track->artist); 673 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_ALBUM, current_track->album); 674 avrcp_target_store_media_attr(connection, AVRCP_MEDIA_ATTR_GENRE, current_track->genre); 675 connection->track_selected = 1; 676 677 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 678 connection->track_changed = 1; 679 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 680 } 681 return; 682 } 683 684 uint8_t avrcp_target_track_changed(uint16_t avrcp_cid, uint8_t * track_id){ 685 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 686 if (!connection){ 687 log_error("avrcp_target_track_changed: could not find connection."); 688 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 689 } 690 if (!track_id) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 691 692 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED)) { 693 connection->track_changed = 1; 694 (void)memcpy(connection->track_id, track_id, 8); 695 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 696 } 697 return ERROR_CODE_SUCCESS; 698 } 699 700 uint8_t avrcp_target_playing_content_changed(uint16_t avrcp_cid){ 701 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 702 if (!connection){ 703 log_error("avrcp_target_playing_content_changed: could not find a connection."); 704 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 705 } 706 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED)) { 707 connection->playing_content_changed = 1; 708 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 709 } 710 return ERROR_CODE_SUCCESS; 711 } 712 713 uint8_t avrcp_target_addressed_player_changed(uint16_t avrcp_cid, uint16_t player_id, uint16_t uid_counter){ 714 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 715 if (!connection){ 716 log_error("avrcp_unit_info: could not find a connection."); 717 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 718 } 719 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED)) { 720 // printf("send AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED\n"); 721 // connection->addressed_player_changed = 1; 722 connection->uid_counter = uid_counter; 723 connection->addressed_player_id = player_id; 724 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 725 } 726 return ERROR_CODE_SUCCESS; 727 } 728 729 uint8_t avrcp_target_battery_status_changed(uint16_t avrcp_cid, avrcp_battery_status_t battery_status){ 730 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 731 if (!connection){ 732 log_error("avrcp_unit_info: could not find a connection."); 733 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 734 } 735 if (connection->battery_status == battery_status) return ERROR_CODE_SUCCESS; 736 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED)) { 737 connection->battery_status = battery_status; 738 connection->battery_status_changed = 1; 739 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 740 } 741 return ERROR_CODE_SUCCESS; 742 } 743 744 uint8_t avrcp_target_volume_changed(uint16_t avrcp_cid, uint8_t volume_percentage){ 745 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 746 if (!connection){ 747 log_error("avrcp_unit_info: could not find a connection."); 748 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 749 } 750 connection->volume_percentage = volume_percentage; 751 if (connection->notifications_enabled & (1 << AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED )) { 752 connection->notify_volume_percentage_changed = 1; 753 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 754 } 755 return ERROR_CODE_SUCCESS; 756 } 757 758 static void avrcp_target_set_transaction_label_for_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification, uint8_t transaction_label){ 759 if (notification > AVRCP_NOTIFICATION_EVENT_MAX_VALUE) return; 760 connection->notifications_transaction_label[notification] = transaction_label; 761 } 762 763 static uint8_t avrcp_target_get_transaction_label_for_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification){ 764 if (notification > AVRCP_NOTIFICATION_EVENT_MAX_VALUE) return 0; 765 return connection->notifications_transaction_label[notification]; 766 } 767 768 static uint8_t * avrcp_get_company_id(uint8_t *packet, uint16_t size){ 769 UNUSED(size); 770 return packet + 6; 771 } 772 773 static uint8_t * avrcp_get_pdu(uint8_t *packet, uint16_t size){ 774 UNUSED(size); 775 return packet + 9; 776 } 777 778 static uint8_t avrcp_is_receive_pass_through_cmd(uint8_t operation_id){ 779 return operation_id & 0x80; 780 } 781 782 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 783 UNUSED(connection); 784 UNUSED(packet); 785 UNUSED(size); 786 787 // uint8_t opcode; 788 uint16_t pid = 0; 789 uint8_t transport_header = packet[0]; 790 connection->transaction_label = transport_header >> 4; 791 // uint8_t frame_type = (transport_header & 0x03) >> 1; 792 avrcp_packet_type_t packet_type = (avrcp_packet_type_t) ((transport_header & 0x0F) >> 2); 793 switch (packet_type){ 794 case AVRCP_SINGLE_PACKET: 795 pid = big_endian_read_16(packet, 1); 796 break; 797 case AVRCP_START_PACKET: 798 pid = big_endian_read_16(packet, 2); 799 break; 800 default: 801 break; 802 } 803 804 switch (packet_type){ 805 case AVRCP_SINGLE_PACKET: 806 case AVRCP_START_PACKET: 807 if (pid != BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL){ 808 log_info("Invalid pid 0x%02x, expected 0x%02x", connection->invalid_pid, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 809 connection->reject_transport_header = 1; 810 connection->invalid_pid = pid; 811 connection->transport_header = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2 ) | (AVRCP_RESPONSE_FRAME << 1) | 1; 812 connection->state = AVCTP_W2_SEND_RESPONSE; 813 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 814 return; 815 } 816 break; 817 default: 818 break; 819 } 820 821 // avrcp_command_type_t ctype = (avrcp_command_type_t) packet[3]; 822 // uint8_t byte_value = packet[4]; 823 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (packet[4] >> 3); 824 avrcp_subunit_id_t subunit_id = (avrcp_subunit_id_t) (packet[4] & 0x07); 825 // opcode = packet[pos++]; 826 // printf(" Transport header 0x%02x (transaction_label %d, packet_type %d, frame_type %d, ipid %d), pid 0x%4x\n", 827 // transport_header, transaction_label, packet_type, frame_type, ipid, pid); 828 // printf_hexdump(packet+pos, size-pos); 829 830 avrcp_command_opcode_t opcode = (avrcp_command_opcode_t) avrcp_cmd_opcode(packet,size); 831 uint8_t * company_id = avrcp_get_company_id(packet, size); 832 uint8_t * pdu = avrcp_get_pdu(packet, size); 833 // uint16_t param_length = big_endian_read_16(pdu, 2); 834 835 int pos = 4; 836 uint16_t length; 837 avrcp_pdu_id_t pdu_id; 838 connection->cmd_operands_length = 0; 839 840 switch (opcode){ 841 case AVRCP_CMD_OPCODE_UNIT_INFO: 842 avrcp_target_unit_info(connection); 843 break; 844 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 845 uint8_t offset = 4 * (packet[pos+2]>>4); 846 avrcp_target_subunit_info(connection, offset); 847 break; 848 } 849 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 850 log_info("AVRCP_OPERATION_ID 0x%02x, operands length %d, operand %d", packet[6], packet[7], packet[8]); 851 avrcp_operation_id_t operation_id = (avrcp_operation_id_t) packet[6]; 852 853 if (avrcp_is_receive_pass_through_cmd(operation_id)){ 854 operation_id = (avrcp_operation_id_t) (packet[6] & 0x7F); 855 avrcp_target_operation_accepted(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 856 break; 857 } 858 859 switch (operation_id){ 860 case AVRCP_OPERATION_ID_PLAY: 861 case AVRCP_OPERATION_ID_PAUSE: 862 case AVRCP_OPERATION_ID_STOP: 863 case AVRCP_OPERATION_ID_VOLUME_UP: 864 case AVRCP_OPERATION_ID_VOLUME_DOWN: 865 case AVRCP_OPERATION_ID_REWIND: 866 case AVRCP_OPERATION_ID_FAST_FORWARD: 867 case AVRCP_OPERATION_ID_FORWARD: 868 case AVRCP_OPERATION_ID_BACKWARD: 869 case AVRCP_OPERATION_ID_SKIP: 870 case AVRCP_OPERATION_ID_MUTE: 871 case AVRCP_OPERATION_ID_CHANNEL_UP: 872 case AVRCP_OPERATION_ID_CHANNEL_DOWN: 873 case AVRCP_OPERATION_ID_SELECT: 874 case AVRCP_OPERATION_ID_UP: 875 case AVRCP_OPERATION_ID_DOWN: 876 case AVRCP_OPERATION_ID_LEFT: 877 case AVRCP_OPERATION_ID_RIGHT: 878 case AVRCP_OPERATION_ID_ROOT_MENU: 879 avrcp_target_operation_accepted(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 880 avrcp_target_emit_operation(avrcp_target_context.avrcp_callback, connection->avrcp_cid, operation_id, packet[7], packet[8]); 881 break; 882 case AVRCP_OPERATION_ID_UNDEFINED: 883 avrcp_target_operation_not_implemented(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 884 return; 885 default: 886 avrcp_target_operation_not_implemented(connection->avrcp_cid, (avrcp_operation_id_t) packet[6], packet[7], packet[8]); 887 return; 888 } 889 break; 890 } 891 892 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 893 pdu_id = (avrcp_pdu_id_t) pdu[0]; 894 // 1 - reserved 895 // 2-3 param length, 896 length = big_endian_read_16(pdu, 2); 897 (void)memcpy(connection->cmd_operands, company_id, 3); 898 connection->cmd_operands_length = 3; 899 switch (pdu_id){ 900 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER:{ 901 if (length == 0){ 902 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PLAYER_ID); 903 break; 904 } 905 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_SUCCESS); 906 break; 907 } 908 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 909 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) pdu[pos]; 910 switch (capability_id){ 911 case AVRCP_CAPABILITY_ID_EVENT: 912 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_EVENT_IDS_QUERY); 913 break; 914 case AVRCP_CAPABILITY_ID_COMPANY: 915 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_COMPANY_IDS_QUERY); 916 break; 917 default: 918 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 919 break; 920 } 921 break; 922 } 923 case AVRCP_PDU_ID_GET_PLAY_STATUS: 924 avrcp_target_emit_respond_vendor_dependent_query(avrcp_target_context.avrcp_callback, connection->avrcp_cid, AVRCP_SUBEVENT_PLAY_STATUS_QUERY); 925 break; 926 case AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE: 927 connection->cmd_operands[0] = pdu[4]; 928 connection->abort_continue_response = 1; 929 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 930 break; 931 case AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE: 932 if (pdu[4] != AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES){ 933 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 934 return; 935 } 936 connection->now_playing_info_response = 1; 937 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 938 break; 939 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 940 uint8_t play_identifier[8]; 941 memset(play_identifier, 0, 8); 942 if (memcmp(pdu+pos, play_identifier, 8) != 0) { 943 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 944 return; 945 } 946 pos += 8; 947 uint8_t attribute_count = pdu[pos++]; 948 // printf("AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES attribute count %d\n", attribute_count); 949 connection->next_attr_id = AVRCP_MEDIA_ATTR_NONE; 950 if (!attribute_count){ 951 connection->now_playing_info_attr_bitmap = 0xFE; 952 } else { 953 int i; 954 connection->now_playing_info_attr_bitmap = 0; 955 for (i=0; i < attribute_count; i++){ 956 uint16_t attr_id = big_endian_read_16(pdu, pos); 957 pos += 2; 958 connection->now_playing_info_attr_bitmap |= (1 << attr_id); 959 } 960 } 961 log_info("now_playing_info_attr_bitmap 0x%02x", connection->now_playing_info_attr_bitmap); 962 avrcp_target_now_playing_info(connection); 963 break; 964 } 965 case AVRCP_PDU_ID_REGISTER_NOTIFICATION:{ 966 // 0 - pdu id 967 // 1 - reserved 968 // 2-3 param length 969 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) pdu[4]; 970 uint16_t event_mask = (1 << event_id); 971 avrcp_target_set_transaction_label_for_notification(connection, event_id, connection->transaction_label); 972 973 switch (event_id){ 974 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED: 975 connection->notifications_enabled |= event_mask; 976 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_INTERIM, subunit_type, subunit_id, opcode); 977 if (connection->track_selected){ 978 avrcp_target_response_vendor_dependent_interim(connection, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_SELECTED, 8); 979 } else { 980 avrcp_target_response_vendor_dependent_interim(connection, pdu_id, event_id, AVRCP_NOTIFICATION_TRACK_NOT_SELECTED, 8); 981 } 982 break; 983 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED: 984 connection->notifications_enabled |= event_mask; 985 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_INTERIM, subunit_type, subunit_id, opcode); 986 avrcp_target_response_vendor_dependent_interim(connection, pdu_id, event_id, (const uint8_t *)&connection->playback_status, 1); 987 break; 988 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED: 989 connection->notifications_enabled |= event_mask; 990 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_INTERIM, subunit_type, subunit_id, opcode); 991 avrcp_target_response_vendor_dependent_interim(connection, pdu_id, event_id, NULL, 0); 992 break; 993 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED: 994 connection->notify_volume_percentage_changed = 0; 995 connection->notifications_enabled |= event_mask; 996 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_INTERIM, subunit_type, subunit_id, opcode); 997 avrcp_target_response_vendor_dependent_interim(connection, pdu_id, event_id, (const uint8_t *)&connection->volume_percentage, 1); 998 break; 999 case AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED: 1000 connection->notifications_enabled |= event_mask; 1001 avrcp_target_response_setup(connection, AVRCP_CTYPE_RESPONSE_INTERIM, subunit_type, subunit_id, opcode); 1002 avrcp_target_response_vendor_dependent_interim(connection, pdu_id, event_id, (const uint8_t *)&connection->battery_status, 1); 1003 break; 1004 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED: 1005 case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED: 1006 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED: 1007 avrcp_target_response_not_implemented(connection, subunit_type, subunit_id, opcode, pdu_id, event_id); 1008 return; 1009 case AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED: 1010 connection->notifications_enabled |= event_mask; 1011 avrcp_target_response_addressed_player_changed_interim(connection, subunit_type, subunit_id, opcode, pdu_id); 1012 return; 1013 default: 1014 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_PARAMETER); 1015 return; 1016 } 1017 break; 1018 } 1019 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME: { 1020 if (length != 1){ 1021 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 1022 break; 1023 } 1024 1025 uint8_t absolute_volume = pdu[4]; 1026 if (absolute_volume < 0x80){ 1027 connection->volume_percentage = absolute_volume; 1028 } 1029 avrcp_target_response_accept(connection, subunit_type, subunit_id, opcode, pdu_id, connection->volume_percentage); 1030 avrcp_target_emit_volume_changed(avrcp_target_context.avrcp_callback, connection->avrcp_cid, connection->volume_percentage); 1031 // avrcp_target_volume_changed(connection->avrcp_cid, connection->volume_percentage); 1032 break; 1033 } 1034 default: 1035 log_info("AVRCP target: unhandled pdu id 0x%02x", pdu_id); 1036 avrcp_target_response_reject(connection, subunit_type, subunit_id, opcode, pdu_id, AVRCP_STATUS_INVALID_COMMAND); 1037 break; 1038 } 1039 break; 1040 default: 1041 log_info("AVRCP target: opcode 0x%02x not implemented", avrcp_cmd_opcode(packet,size)); 1042 break; 1043 } 1044 } 1045 1046 #if 0 1047 static int avrcp_target_send_addressed_player_changed_notification(uint16_t cid, avrcp_connection_t * connection, uint16_t uid, uint16_t uid_counter){ 1048 if (!connection){ 1049 log_error("avrcp tartget: could not find a connection."); 1050 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1051 } 1052 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1053 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 1054 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1055 connection->subunit_id = AVRCP_SUBUNIT_ID; 1056 1057 uint16_t pos = 0; 1058 l2cap_reserve_packet_buffer(); 1059 uint8_t * packet = l2cap_get_outgoing_buffer(); 1060 1061 connection->packet_type = AVRCP_SINGLE_PACKET; 1062 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1063 // Profile IDentifier (PID) 1064 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1065 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1066 1067 // command_type 1068 packet[pos++] = connection->command_type; 1069 // subunit_type | subunit ID 1070 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1071 // opcode 1072 packet[pos++] = (uint8_t)connection->command_opcode; 1073 1074 // company id is 3 bytes long 1075 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1076 pos += 3; 1077 1078 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1079 packet[pos++] = 0; 1080 big_endian_store_16(packet, pos, 5); 1081 pos += 2; 1082 packet[pos++] = AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED; 1083 big_endian_store_16(packet, pos, uid); 1084 pos += 2; 1085 big_endian_store_16(packet, pos, uid_counter); 1086 pos += 2; 1087 1088 connection->wait_to_send = 0; 1089 return l2cap_send_prepared(cid, pos); 1090 } 1091 #endif 1092 1093 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){ 1094 if (!connection){ 1095 log_error("avrcp tartget: could not find a connection."); 1096 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1097 } 1098 1099 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1100 connection->command_type = AVRCP_CTYPE_RESPONSE_CHANGED_STABLE; 1101 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1102 connection->subunit_id = AVRCP_SUBUNIT_ID; 1103 connection->transaction_label = avrcp_target_get_transaction_label_for_notification(connection, notification_id); 1104 1105 uint16_t pos = 0; 1106 l2cap_reserve_packet_buffer(); 1107 uint8_t * packet = l2cap_get_outgoing_buffer(); 1108 uint16_t size = l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid); 1109 1110 connection->packet_type = AVRCP_SINGLE_PACKET; 1111 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 1112 // Profile IDentifier (PID) 1113 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 1114 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 1115 1116 // command_type 1117 packet[pos++] = connection->command_type; 1118 // subunit_type | subunit ID 1119 packet[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 1120 // opcode 1121 packet[pos++] = (uint8_t)connection->command_opcode; 1122 1123 // company id is 3 bytes long 1124 big_endian_store_24(packet, pos, BT_SIG_COMPANY_ID); 1125 pos += 3; 1126 1127 packet[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 1128 packet[pos++] = 0; 1129 uint16_t remainig_outgoing_buffer_size = size - pos - 2; 1130 1131 uint16_t caped_value_len = btstack_min(value_len + 1, remainig_outgoing_buffer_size); 1132 big_endian_store_16(packet, pos, caped_value_len); 1133 pos += 2; 1134 packet[pos++] = notification_id; 1135 (void)memcpy(packet + pos, value, caped_value_len - 1); 1136 pos += caped_value_len - 1; 1137 connection->wait_to_send = 0; 1138 return l2cap_send_prepared(cid, pos); 1139 } 1140 1141 static void avrcp_target_reset_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t notification_id){ 1142 if (!connection){ 1143 log_error("avrcp tartget: could not find a connection."); 1144 return; 1145 } 1146 connection->notifications_enabled &= ~(1 << notification_id); 1147 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1148 avrcp_target_set_transaction_label_for_notification(connection, notification_id, 0); 1149 } 1150 1151 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1152 avrcp_connection_t * connection; 1153 switch (packet_type) { 1154 case L2CAP_DATA_PACKET: 1155 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, channel); 1156 if (!connection) break; 1157 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 1158 break; 1159 case HCI_EVENT_PACKET: 1160 switch (hci_event_packet_get_type(packet)){ 1161 case HCI_EVENT_AVRCP_META: 1162 // forward to app 1163 (*avrcp_target_context.avrcp_callback)(packet_type, channel, packet, size); 1164 break; 1165 case L2CAP_EVENT_CAN_SEND_NOW:{ 1166 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, channel); 1167 if (!connection) { 1168 log_error("Connection not found\n"); 1169 break; 1170 } 1171 1172 if (connection->accept_response){ 1173 connection->accept_response = 0; 1174 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1175 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1176 break; 1177 } 1178 if (connection->abort_continue_response){ 1179 connection->abort_continue_response = 0; 1180 connection->now_playing_info_response = 0; 1181 avrcp_target_abort_continue_response(connection->l2cap_signaling_cid, connection); 1182 break; 1183 } 1184 1185 if (connection->now_playing_info_response){ 1186 connection->now_playing_info_response = 0; 1187 avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1188 break; 1189 } 1190 1191 if (connection->track_changed){ 1192 connection->track_changed = 0; 1193 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, connection->track_id, 8); 1194 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1195 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1196 break; 1197 } 1198 1199 if (connection->playback_status_changed){ 1200 connection->playback_status_changed = 0; 1201 uint8_t playback_status = (uint8_t) connection->playback_status; 1202 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, &playback_status, 1); 1203 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 1204 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1205 break; 1206 } 1207 1208 // if (connection->addressed_player_changed){ 1209 // connection->playback_status_changed = 0; 1210 // avrcp_target_send_addressed_player_changed_notification(connection->l2cap_signaling_cid, connection, connection->addressed_player_id, connection->uid_counter); 1211 // avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED); 1212 // avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1213 // break; 1214 // } 1215 1216 if (connection->playing_content_changed){ 1217 connection->playing_content_changed = 0; 1218 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED, NULL, 0); 1219 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 1220 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1221 break; 1222 } 1223 1224 if (connection->battery_status_changed){ 1225 connection->battery_status_changed = 0; 1226 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED, (uint8_t *)&connection->battery_status, 1); 1227 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 1228 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1229 break; 1230 } 1231 1232 if (connection->notify_volume_percentage_changed){ 1233 // printf("emit new volume %d\n", connection->volume_percentage); 1234 connection->notify_volume_percentage_changed = 0; 1235 avrcp_target_send_notification(connection->l2cap_signaling_cid, connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED, &connection->volume_percentage, 1); 1236 avrcp_target_reset_notification(connection, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 1237 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1238 break; 1239 } 1240 1241 if (connection->reject_transport_header){ 1242 connection->state = AVCTP_CONNECTION_OPENED; 1243 connection->reject_transport_header = 0; 1244 l2cap_reserve_packet_buffer(); 1245 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 1246 out_buffer[0] = connection->transport_header; 1247 big_endian_store_16(out_buffer, 1, connection->invalid_pid); 1248 l2cap_send_prepared(connection->l2cap_signaling_cid, 3); 1249 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1250 break; 1251 } 1252 1253 switch (connection->state){ 1254 case AVCTP_W2_SEND_RESPONSE: 1255 connection->state = AVCTP_CONNECTION_OPENED; 1256 // if (connection->now_playing_info_response){ 1257 // connection->now_playing_info_response = 0; 1258 // avrcp_target_send_now_playing_info(connection->l2cap_signaling_cid, connection); 1259 // break; 1260 // } 1261 avrcp_target_send_response(connection->l2cap_signaling_cid, connection); 1262 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1263 return; 1264 default: 1265 break; 1266 } 1267 1268 break; 1269 } 1270 default: 1271 break; 1272 } 1273 default: 1274 break; 1275 } 1276 } 1277 1278 void avrcp_target_init(void){ 1279 avrcp_init(); 1280 avrcp_target_context.role = AVRCP_TARGET; 1281 avrcp_target_context.packet_handler = avrcp_target_packet_handler; 1282 avrcp_register_target_packet_handler(&avrcp_target_packet_handler); 1283 } 1284 1285 void avrcp_target_register_packet_handler(btstack_packet_handler_t callback){ 1286 if (callback == NULL){ 1287 log_error("avrcp_register_packet_handler called with NULL callback"); 1288 return; 1289 } 1290 avrcp_target_context.avrcp_callback = callback; 1291 } 1292 1293 uint8_t avrcp_target_connect(bd_addr_t bd_addr, uint16_t * avrcp_cid){ 1294 return avrcp_connect(AVRCP_TARGET, bd_addr, &avrcp_target_context, avrcp_cid); 1295 } 1296 1297 uint8_t avrcp_target_disconnect(uint16_t avrcp_cid){ 1298 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(AVRCP_TARGET, avrcp_cid); 1299 if (!connection){ 1300 log_error("avrcp_target_disconnect: could not find a connection."); 1301 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1302 } 1303 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1304 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1305 return ERROR_CODE_SUCCESS; 1306 } 1307 1308