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