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_controller.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 #include "classic/avrcp_controller.h" 49 50 // made public in avrcp_controller.h 51 avrcp_context_t avrcp_controller_context; 52 53 static int avrcp_controller_supports_browsing(uint16_t controller_supported_features){ 54 return controller_supported_features & (1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_BROWSING); 55 } 56 57 void avrcp_controller_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 58 if (browsing){ 59 supported_features |= (1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_BROWSING); 60 } 61 avrcp_create_sdp_record(1, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 62 } 63 64 static void avrcp_emit_repeat_and_shuffle_mode(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_repeat_mode_t repeat_mode, avrcp_shuffle_mode_t shuffle_mode){ 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_SHUFFLE_AND_REPEAT_MODE; 71 little_endian_store_16(event, pos, avrcp_cid); 72 pos += 2; 73 event[pos++] = ctype; 74 event[pos++] = repeat_mode; 75 event[pos++] = shuffle_mode; 76 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 77 } 78 79 static void avrcp_emit_operation_status(btstack_packet_handler_t callback, uint8_t subevent, uint16_t avrcp_cid, uint8_t ctype, uint8_t operation_id){ 80 if (!callback) return; 81 uint8_t event[7]; 82 int pos = 0; 83 event[pos++] = HCI_EVENT_AVRCP_META; 84 event[pos++] = sizeof(event) - 2; 85 event[pos++] = subevent; 86 little_endian_store_16(event, pos, avrcp_cid); 87 pos += 2; 88 event[pos++] = ctype; 89 event[pos++] = operation_id; 90 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 91 } 92 93 static void avrcp_press_and_hold_timeout_handler(btstack_timer_source_t * timer){ 94 UNUSED(timer); 95 avrcp_connection_t * connection = (avrcp_connection_t*) btstack_run_loop_get_timer_context(timer); 96 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 97 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 98 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 99 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 100 } 101 102 static void avrcp_press_and_hold_timer_start(avrcp_connection_t * connection){ 103 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 104 btstack_run_loop_set_timer_handler(&connection->press_and_hold_cmd_timer, avrcp_press_and_hold_timeout_handler); 105 btstack_run_loop_set_timer_context(&connection->press_and_hold_cmd_timer, connection); 106 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 107 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 108 } 109 110 static void avrcp_press_and_hold_timer_stop(avrcp_connection_t * connection){ 111 connection->continuous_fast_forward_cmd = 0; 112 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 113 } 114 115 static uint8_t request_pass_through_release_control_cmd(avrcp_connection_t * connection){ 116 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 117 if (connection->continuous_fast_forward_cmd){ 118 avrcp_press_and_hold_timer_stop(connection); 119 } 120 connection->cmd_operands[0] = 0x80 | connection->cmd_operands[0]; 121 connection->transaction_label++; 122 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 123 return ERROR_CODE_SUCCESS; 124 } 125 126 static inline uint8_t request_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed, uint8_t continuous_fast_forward_cmd, avrcp_context_t * context){ 127 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, context); 128 if (!connection){ 129 log_error("avrcp: could not find a connection."); 130 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 131 } 132 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 133 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 134 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 135 connection->command_type = AVRCP_CTYPE_CONTROL; 136 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 137 connection->subunit_id = AVRCP_SUBUNIT_ID; 138 connection->cmd_operands_length = 0; 139 140 connection->continuous_fast_forward_cmd = continuous_fast_forward_cmd; 141 connection->cmd_operands_length = 2; 142 connection->cmd_operands[0] = opid; 143 if (playback_speed > 0){ 144 connection->cmd_operands[2] = playback_speed; 145 connection->cmd_operands_length++; 146 } 147 connection->cmd_operands[1] = connection->cmd_operands_length - 2; 148 149 if (connection->continuous_fast_forward_cmd){ 150 avrcp_press_and_hold_timer_start(connection); 151 } 152 153 connection->transaction_label++; 154 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 155 return ERROR_CODE_SUCCESS; 156 } 157 158 static uint8_t request_single_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 159 return request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, 0, &avrcp_controller_context); 160 } 161 162 static uint8_t request_continuous_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 163 return request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, 1, &avrcp_controller_context); 164 } 165 166 #define AVRCP_CMD_BUFFER_SIZE 30 167 static uint16_t avrcp_get_max_payload_size_for_packet_type(avrcp_packet_type_t packet_type){ 168 switch (packet_type){ 169 case AVRCP_SINGLE_PACKET: 170 return AVRCP_CMD_BUFFER_SIZE - 3; 171 case AVRCP_START_PACKET: 172 return AVRCP_CMD_BUFFER_SIZE - 4; 173 case AVRCP_CONTINUE_PACKET: 174 case AVRCP_END_PACKET: 175 return AVRCP_CMD_BUFFER_SIZE - 1; 176 } 177 return 0; 178 } 179 180 static int avrcp_send_cmd(avrcp_connection_t * connection, avrcp_packet_type_t packet_type){ 181 uint8_t command[AVRCP_CMD_BUFFER_SIZE]; 182 int pos = 0; 183 uint16_t max_bytes = sizeof(command) - 1; 184 185 // transport header 186 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 187 command[pos++] = (connection->transaction_label << 4) | (packet_type << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 188 189 if (packet_type == AVRCP_START_PACKET){ 190 // num packets: (3 bytes overhead (PID, num packets) + command) / (MTU - transport header) 191 command[pos++] = ((connection->cmd_operands_fragmented_len + 3 - 1) / (AVRCP_CMD_BUFFER_SIZE - 1)) + 1; 192 max_bytes -= 3; 193 } 194 195 if (packet_type == AVRCP_SINGLE_PACKET || packet_type == AVRCP_START_PACKET){ 196 // Profile IDentifier (PID) 197 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 198 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 199 200 // command_type 201 command[pos++] = connection->command_type; 202 // subunit_type | subunit ID 203 command[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 204 // opcode 205 command[pos++] = (uint8_t)connection->command_opcode; 206 } 207 208 if (packet_type == AVRCP_SINGLE_PACKET){ 209 // operands 210 memcpy(command+pos, connection->cmd_operands, connection->cmd_operands_length); 211 pos += connection->cmd_operands_length; 212 } else { 213 uint16_t bytes_to_copy = btstack_min(connection->cmd_operands_fragmented_len-connection->cmd_operands_fragmented_pos, max_bytes); 214 memcpy(command+pos, &connection->cmd_operands_fragmented_buffer[connection->cmd_operands_fragmented_pos], bytes_to_copy); 215 pos += bytes_to_copy; 216 connection->cmd_operands_fragmented_pos += bytes_to_copy; 217 } 218 219 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 220 } 221 222 static int avrcp_register_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 223 if (connection->notifications_to_deregister & (1 << event_id)) return 0; 224 if (connection->notifications_enabled & (1 << event_id)) return 0; 225 if (connection->notifications_to_register & (1 << event_id)) return 0; 226 connection->notifications_to_register |= (1 << event_id); 227 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 228 return 1; 229 } 230 231 static void avrcp_prepare_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 232 connection->transaction_label++; 233 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 234 connection->command_type = AVRCP_CTYPE_NOTIFY; 235 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 236 connection->subunit_id = AVRCP_SUBUNIT_ID; 237 int pos = 0; 238 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 239 pos += 3; 240 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 241 connection->cmd_operands[pos++] = 0; // reserved(upper 6) | packet_type -> 0 242 big_endian_store_16(connection->cmd_operands, pos, 5); // parameter length 243 pos += 2; 244 connection->cmd_operands[pos++] = event_id; 245 big_endian_store_32(connection->cmd_operands, pos, 1); // send notification on playback position every second, for other notifications it is ignored 246 pos += 4; 247 connection->cmd_operands_length = pos; 248 // AVRCP_SPEC_V14.pdf 166 249 // answer page 61 250 } 251 252 253 static void avrcp_parser_reset(avrcp_connection_t * connection){ 254 connection->list_offset = 0; 255 connection->num_attributes = 0; 256 connection->num_parsed_attributes = 0; 257 connection->parser_attribute_header_pos = 0; 258 connection->num_received_fragments = 0; 259 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 260 } 261 262 static void avrcp_controller_emit_now_playing_info_event_done(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, uint8_t status){ 263 uint8_t event[7]; 264 int pos = 0; 265 event[pos++] = HCI_EVENT_AVRCP_META; 266 event[pos++] = sizeof(event) - 2; 267 event[pos++] = AVRCP_SUBEVENT_NOW_PLAYING_INFO_DONE; 268 little_endian_store_16(event, pos, avrcp_cid); 269 pos += 2; 270 event[pos++] = ctype; 271 event[pos++] = status; 272 // printf_hexdump(event, pos); 273 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 274 } 275 276 static void avrcp_controller_emit_now_playing_info_event(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_media_attribute_id_t attr_id, uint8_t * value, uint16_t value_len){ 277 uint8_t event[HCI_EVENT_BUFFER_SIZE]; 278 int pos = 0; 279 event[pos++] = HCI_EVENT_AVRCP_META; 280 // reserve one byte for subevent type and data len 281 int data_len_pos = pos; 282 pos++; 283 int subevent_type_pos = pos; 284 pos++; 285 little_endian_store_16(event, pos, avrcp_cid); 286 pos += 2; 287 event[pos++] = ctype; 288 289 switch (attr_id){ 290 case AVRCP_MEDIA_ATTR_TITLE: 291 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO; 292 event[pos++] = value_len; 293 memcpy(event+pos, value, value_len); 294 break; 295 case AVRCP_MEDIA_ATTR_ARTIST: 296 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO; 297 event[pos++] = value_len; 298 memcpy(event+pos, value, value_len); 299 break; 300 case AVRCP_MEDIA_ATTR_ALBUM: 301 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO; 302 event[pos++] = value_len; 303 memcpy(event+pos, value, value_len); 304 break; 305 case AVRCP_MEDIA_ATTR_GENRE: 306 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO; 307 event[pos++] = value_len; 308 memcpy(event+pos, value, value_len); 309 break; 310 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 311 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_SONG_LENGTH_MS_INFO; 312 if (value){ 313 little_endian_store_32(event, pos, btstack_atoi((char *)value)); 314 } else { 315 little_endian_store_32(event, pos, 0); 316 } 317 pos += 4; 318 break; 319 case AVRCP_MEDIA_ATTR_TRACK: 320 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO; 321 if (value){ 322 event[pos++] = btstack_atoi((char *)value); 323 } else { 324 event[pos++] = 0; 325 } 326 break; 327 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 328 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO; 329 if (value){ 330 event[pos++] = btstack_atoi((char *)value); 331 } else { 332 event[pos++] = 0; 333 } 334 break; 335 default: 336 break; 337 } 338 event[data_len_pos] = pos - 2; 339 // printf("Send attribute 0x%02x, len %u\n", attr_id, value_len); 340 // printf_hexdump(value, value_len); 341 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 342 } 343 344 static void avrcp_parser_process_byte(uint8_t byte, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 345 uint16_t attribute_total_value_len; 346 uint32_t attribute_id; 347 // printf("avrcp_parser_process_byte: %02x, state %02x\n", byte, connection->parser_state); 348 switch(connection->parser_state){ 349 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER: 350 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 351 connection->list_offset++; 352 353 if (connection->parser_attribute_header_pos < AVRCP_ATTRIBUTE_HEADER_LEN) return; 354 355 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 356 connection->attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTTE_SIZE); 357 if (connection->attribute_value_len > 0){ 358 // get ready for attribute value 359 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 360 return; 361 } 362 363 // emit empty attribute 364 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 365 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 366 367 // done, see below 368 break; 369 370 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE: 371 connection->attribute_value[connection->attribute_value_offset++] = byte; 372 connection->list_offset++; 373 374 if (connection->attribute_value_offset < connection->attribute_value_len) return; 375 376 // emit (potentially partial) attribute 377 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 378 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 379 380 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 381 if (connection->attribute_value_offset < attribute_total_value_len){ 382 // ignore rest of attribute 383 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 384 return; 385 } 386 387 // done, see below 388 break; 389 390 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 391 connection->attribute_value_offset++; 392 connection->list_offset++; 393 394 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 395 if (connection->attribute_value_offset < attribute_total_value_len) return; 396 397 // done, see below 398 break; 399 400 default: 401 return; 402 } 403 404 // attribute fully read, check if more to come 405 if (connection->list_offset < connection->list_size){ 406 // more to come, reset parser 407 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 408 connection->parser_attribute_header_pos = 0; 409 connection->attribute_value_offset = 0; 410 } else { 411 // fully done 412 avrcp_parser_reset(connection); 413 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 414 } 415 } 416 417 static void avrcp_source_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 418 int i; 419 for (i=0;i<num_bytes_to_read;i++){ 420 avrcp_parser_process_byte(packet[i], connection, ctype); 421 } 422 } 423 424 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 425 connection->state = AVCTP_W2_SEND_COMMAND; 426 connection->transaction_label++; 427 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 428 connection->command_type = AVRCP_CTYPE_CONTROL; 429 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 430 connection->subunit_id = AVRCP_SUBUNIT_ID; 431 int pos = 0; 432 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 433 pos += 3; 434 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE; // PDU ID 435 connection->cmd_operands[pos++] = 0; 436 // Parameter Length 437 connection->cmd_operands_length = 8; 438 big_endian_store_16(connection->cmd_operands, pos, 1); 439 pos += 2; 440 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 441 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 442 return ERROR_CODE_SUCCESS; 443 } 444 445 446 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 447 connection->state = AVCTP_W2_SEND_COMMAND; 448 connection->transaction_label++; 449 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 450 connection->command_type = AVRCP_CTYPE_CONTROL; 451 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 452 connection->subunit_id = AVRCP_SUBUNIT_ID; 453 int pos = 0; 454 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 455 pos += 3; 456 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE; // PDU ID 457 connection->cmd_operands[pos++] = 0; 458 // Parameter Length 459 connection->cmd_operands_length = 8; 460 big_endian_store_16(connection->cmd_operands, pos, 1); 461 pos += 2; 462 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 463 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 464 return ERROR_CODE_SUCCESS; 465 } 466 467 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 468 uint8_t operands[20]; 469 uint8_t opcode; 470 int pos = 3; 471 // uint8_t transport_header = packet[0]; 472 // uint8_t transaction_label = transport_header >> 4; 473 // uint8_t packet_type = (transport_header & 0x0F) >> 2; 474 // uint8_t frame_type = (transport_header & 0x03) >> 1; 475 // uint8_t ipid = transport_header & 0x01; 476 // uint8_t byte_value = packet[2]; 477 // uint16_t pid = (byte_value << 8) | packet[2]; 478 479 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 480 uint8_t byte_value = packet[pos++]; 481 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 482 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 483 opcode = packet[pos++]; 484 485 // printf(" Transport header 0x%02x (transaction_label %d, packet_type %d, frame_type %d, ipid %d), pid 0x%4x\n", 486 // transport_header, transaction_label, packet_type, frame_type, ipid, pid); 487 // // printf_hexdump(packet+pos, size-pos); 488 489 uint8_t pdu_id; 490 uint16_t param_length; 491 switch (avrcp_cmd_opcode(packet,size)){ 492 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 493 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 494 connection->state = AVCTP_CONNECTION_OPENED; 495 // operands: 496 memcpy(operands, packet+pos, 5); 497 uint8_t unit_type = operands[1] >> 3; 498 uint8_t max_subunit_ID = operands[1] & 0x07; 499 log_info(" SUBUNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, max_subunit_ID %d", ctype, subunit_type, subunit_id, opcode, unit_type, max_subunit_ID); 500 break; 501 } 502 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 503 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 504 connection->state = AVCTP_CONNECTION_OPENED; 505 // operands: 506 memcpy(operands, packet+pos, 5); 507 uint8_t unit_type = operands[1] >> 3; 508 uint8_t unit = operands[1] & 0x07; 509 uint32_t company_id = operands[2] << 16 | operands[3] << 8 | operands[4]; 510 log_info(" UNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, unit %d, company_id 0x%06" PRIx32, 511 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 512 break; 513 } 514 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 515 if (size - pos < 7) { 516 log_error("avrcp: wrong packet size"); 517 return; 518 }; 519 // operands: 520 memcpy(operands, packet+pos, 7); 521 pos += 7; 522 // uint32_t company_id = operands[0] << 16 | operands[1] << 8 | operands[2]; 523 pdu_id = operands[3]; 524 525 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE && pdu_id != AVRCP_PDU_ID_REGISTER_NOTIFICATION){ 526 log_info("AVRCP_CMD_OPCODE_VENDOR_DEPENDENT state %d", connection->state); 527 return; 528 } 529 connection->state = AVCTP_CONNECTION_OPENED; 530 531 532 // uint8_t unit_type = operands[4] >> 3; 533 // uint8_t unit = operands[4] & 0x07; 534 param_length = big_endian_read_16(operands, 5); 535 536 // printf(" VENDOR DEPENDENT response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, unit %d, company_id 0x%06x\n", 537 // ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id ); 538 539 // if (ctype == AVRCP_CTYPE_RESPONSE_INTERIM) return; 540 log_info(" VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 541 switch (pdu_id){ 542 case AVRCP_PDU_ID_GetCurrentPlayerApplicationSettingValue:{ 543 uint8_t num_attributes = packet[pos++]; 544 int i; 545 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 546 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 547 for (i = 0; i < num_attributes; i++){ 548 uint8_t attribute_id = packet[pos++]; 549 uint8_t value = packet[pos++]; 550 switch (attribute_id){ 551 case 0x02: 552 repeat_mode = (avrcp_repeat_mode_t) value; 553 break; 554 case 0x03: 555 shuffle_mode = (avrcp_shuffle_mode_t) value; 556 break; 557 default: 558 break; 559 } 560 } 561 avrcp_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 562 break; 563 } 564 case AVRCP_PDU_ID_SetPlayerApplicationSettingValue:{ 565 uint8_t event[6]; 566 int offset = 0; 567 event[offset++] = HCI_EVENT_AVRCP_META; 568 event[offset++] = sizeof(event) - 2; 569 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 570 little_endian_store_16(event, offset, connection->avrcp_cid); 571 offset += 2; 572 event[offset++] = ctype; 573 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 574 break; 575 } 576 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 577 uint8_t event[7]; 578 int offset = 0; 579 event[offset++] = HCI_EVENT_AVRCP_META; 580 event[offset++] = sizeof(event) - 2; 581 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 582 little_endian_store_16(event, offset, connection->avrcp_cid); 583 offset += 2; 584 event[offset++] = ctype; 585 event[offset++] = packet[pos++]; 586 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 587 break; 588 } 589 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 590 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 591 uint8_t capability_count = packet[pos++]; 592 int i; 593 switch (capability_id){ 594 case AVRCP_CAPABILITY_ID_COMPANY: 595 // log_info("Supported companies %d: ", capability_count); 596 for (i = 0; i < capability_count; i++){ 597 uint32_t company_id = big_endian_read_24(packet, pos); 598 pos += 3; 599 log_info(" 0x%06" PRIx32 ", ", company_id); 600 } 601 break; 602 case AVRCP_CAPABILITY_ID_EVENT: 603 // log_info("Supported events %d: ", capability_count); 604 for (i = 0; i < capability_count; i++){ 605 uint8_t event_id = packet[pos++]; 606 log_info(" 0x%02x %s", event_id, avrcp_event2str(event_id)); 607 } 608 break; 609 } 610 break; 611 } 612 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 613 uint32_t song_length = big_endian_read_32(packet, pos); 614 pos += 4; 615 uint32_t song_position = big_endian_read_32(packet, pos); 616 pos += 4; 617 uint8_t play_status = packet[pos]; 618 // log_info(" GET_PLAY_STATUS length 0x%04X, position 0x%04X, status %s", song_length, song_position, avrcp_play_status2str(play_status)); 619 620 uint8_t event[15]; 621 int offset = 0; 622 event[offset++] = HCI_EVENT_AVRCP_META; 623 event[offset++] = sizeof(event) - 2; 624 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 625 little_endian_store_16(event, offset, connection->avrcp_cid); 626 offset += 2; 627 event[offset++] = ctype; 628 little_endian_store_32(event, offset, song_length); 629 offset += 4; 630 little_endian_store_32(event, offset, song_position); 631 offset += 4; 632 event[offset++] = play_status; 633 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 634 break; 635 } 636 case AVRCP_PDU_ID_REGISTER_NOTIFICATION:{ 637 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) packet[pos++]; 638 uint16_t event_mask = (1 << event_id); 639 uint16_t reset_event_mask = ~event_mask; 640 switch (ctype){ 641 case AVRCP_CTYPE_RESPONSE_INTERIM: 642 // register as enabled 643 connection->notifications_enabled |= event_mask; 644 // printf("INTERIM notifications_enabled 0x%2x, notifications_to_register 0x%2x\n", connection->notifications_enabled, connection->notifications_to_register); 645 break; 646 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 647 // received change, event is considered deregistered 648 // we are re-enabling it automatically, if it is not 649 // explicitly disabled 650 connection->notifications_enabled &= reset_event_mask; 651 if (! (connection->notifications_to_deregister & event_mask)){ 652 avrcp_register_notification(connection, event_id); 653 // printf("CHANGED_STABLE notifications_enabled 0x%2x, notifications_to_register 0x%2x\n", connection->notifications_enabled, connection->notifications_to_register); 654 } else { 655 connection->notifications_to_deregister &= reset_event_mask; 656 } 657 break; 658 default: 659 connection->notifications_to_register &= reset_event_mask; 660 connection->notifications_enabled &= reset_event_mask; 661 connection->notifications_to_deregister &= reset_event_mask; 662 break; 663 } 664 665 switch (event_id){ 666 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED:{ 667 uint32_t song_position = big_endian_read_32(packet, pos); 668 uint8_t event[10]; 669 int offset = 0; 670 event[offset++] = HCI_EVENT_AVRCP_META; 671 event[offset++] = sizeof(event) - 2; 672 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED; 673 little_endian_store_16(event, offset, connection->avrcp_cid); 674 offset += 2; 675 event[offset++] = ctype; 676 little_endian_store_32(event, offset, song_position); 677 offset += 4; 678 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 679 break; 680 } 681 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED:{ 682 uint8_t event[7]; 683 int offset = 0; 684 event[offset++] = HCI_EVENT_AVRCP_META; 685 event[offset++] = sizeof(event) - 2; 686 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED; 687 little_endian_store_16(event, offset, connection->avrcp_cid); 688 offset += 2; 689 event[offset++] = ctype; 690 event[offset++] = packet[pos]; 691 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 692 break; 693 } 694 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED:{ 695 uint8_t event[6]; 696 int offset = 0; 697 event[offset++] = HCI_EVENT_AVRCP_META; 698 event[offset++] = sizeof(event) - 2; 699 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED; 700 little_endian_store_16(event, offset, connection->avrcp_cid); 701 offset += 2; 702 event[offset++] = ctype; 703 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 704 break; 705 } 706 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED:{ 707 uint8_t event[6]; 708 int offset = 0; 709 event[offset++] = HCI_EVENT_AVRCP_META; 710 event[offset++] = sizeof(event) - 2; 711 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED; 712 little_endian_store_16(event, offset, connection->avrcp_cid); 713 offset += 2; 714 event[offset++] = ctype; 715 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 716 break; 717 } 718 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED:{ 719 uint8_t event[6]; 720 int offset = 0; 721 event[offset++] = HCI_EVENT_AVRCP_META; 722 event[offset++] = sizeof(event) - 2; 723 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED; 724 little_endian_store_16(event, offset, connection->avrcp_cid); 725 offset += 2; 726 event[offset++] = ctype; 727 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 728 break; 729 } 730 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED:{ 731 uint8_t event[7]; 732 int offset = 0; 733 event[offset++] = HCI_EVENT_AVRCP_META; 734 event[offset++] = sizeof(event) - 2; 735 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 736 little_endian_store_16(event, offset, connection->avrcp_cid); 737 offset += 2; 738 event[offset++] = ctype; 739 event[offset++] = packet[pos++] & 0x7F; 740 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 741 break; 742 } 743 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED:{ 744 uint8_t event[7]; 745 int offset = 0; 746 event[offset++] = HCI_EVENT_AVRCP_META; 747 event[offset++] = sizeof(event) - 2; 748 event[offset++] = AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED; 749 little_endian_store_16(event, offset, connection->avrcp_cid); 750 offset += 2; 751 event[offset++] = ctype; 752 event[offset++] = packet[pos++] & 0x7F; 753 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 754 break; 755 } 756 757 // case AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED:{ 758 // uint8_t num_PlayerApplicationSettingAttributes = packet[pos++]; 759 // int i; 760 // for (i = 0; i < num_PlayerApplicationSettingAttributes; i++){ 761 // uint8_t PlayerApplicationSetting_AttributeID = packet[pos++]; 762 // uint8_t PlayerApplicationSettingValueID = packet[pos++]; 763 // } 764 // break; 765 // } 766 // case AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED: 767 // uint16_t player_id = big_endian_read_16(packet, pos); 768 // pos += 2; 769 // uint16_t uid_counter = big_endian_read_16(packet, pos); 770 // pos += 2; 771 // break; 772 // case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED: 773 // uint16_t uid_counter = big_endian_read_16(packet, pos); 774 // pos += 2; 775 // break; 776 default: 777 log_info("avrcp: not implemented"); 778 break; 779 } 780 if (connection->notifications_to_register != 0){ 781 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 782 } 783 break; 784 } 785 786 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 787 avrcp_packet_type_t packet_type = (avrcp_packet_type_t) (operands[4] & 0x03); 788 switch (packet_type){ 789 case AVRCP_START_PACKET: 790 case AVRCP_SINGLE_PACKET: 791 avrcp_parser_reset(connection); 792 connection->list_size = param_length; 793 connection->num_attributes = packet[pos++]; 794 795 // printf("AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES num_attributes %d, total size %d, packet type 0x%02x \n", connection->num_attributes, connection->list_size, operands[4] & 0x03); 796 avrcp_source_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 797 798 if (packet_type == AVRCP_START_PACKET){ 799 avrcp_controller_request_continue_response(connection); 800 } 801 break; 802 case AVRCP_CONTINUE_PACKET: 803 case AVRCP_END_PACKET: 804 connection->num_received_fragments++; 805 if (connection->num_received_fragments < connection->max_num_fragments){ 806 avrcp_source_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 807 if (packet_type == AVRCP_CONTINUE_PACKET){ 808 avrcp_controller_request_continue_response(connection); 809 } 810 } else { 811 avrcp_controller_request_abort_continuation(connection); 812 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 813 avrcp_parser_reset(connection); 814 } 815 break; 816 } 817 } 818 default: 819 break; 820 } 821 break; 822 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 823 // 0x80 | connection->cmd_operands[0] 824 uint8_t operation_id = packet[pos++]; 825 switch (connection->state){ 826 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 827 if (connection->continuous_fast_forward_cmd){ 828 connection->state = AVCTP_W4_STOP; 829 } else { 830 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 831 } 832 break; 833 case AVCTP_W2_RECEIVE_RESPONSE: 834 connection->state = AVCTP_CONNECTION_OPENED; 835 break; 836 default: 837 // check for notifications? move state transition down 838 // log_info("AVRCP_CMD_OPCODE_PASS_THROUGH state %d\n", connection->state); 839 break; 840 } 841 if (connection->state == AVCTP_W4_STOP){ 842 avrcp_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 843 } 844 if (connection->state == AVCTP_CONNECTION_OPENED) { 845 // RELEASE response 846 operation_id = operation_id & 0x7F; 847 avrcp_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 848 } 849 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 850 // PRESS response 851 request_pass_through_release_control_cmd(connection); 852 } 853 break; 854 } 855 default: 856 break; 857 } 858 859 // trigger pending notification reqistrations 860 if (connection->state == AVCTP_CONNECTION_OPENED && connection->notifications_to_register){ 861 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 862 } 863 } 864 865 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 866 int i; 867 switch (connection->state){ 868 case AVCTP_W2_SEND_PRESS_COMMAND: 869 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 870 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 871 break; 872 case AVCTP_W2_SEND_COMMAND: 873 case AVCTP_W2_SEND_RELEASE_COMMAND: 874 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 875 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 876 break; 877 case AVCTP_CONNECTION_OPENED: 878 if (connection->notifications_to_register != 0){ 879 for (i = 1; i <= AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED; i++){ 880 if (connection->notifications_to_register & (1<<i)){ 881 connection->notifications_to_register &= ~ (1 << i); 882 avrcp_prepare_notification(connection, (avrcp_notification_event_id_t) i); 883 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 884 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 885 return; 886 } 887 } 888 } 889 return; 890 case AVCTP_W2_SEND_FRAGMENTED_COMMAND: 891 if (connection->cmd_operands_fragmented_pos == 0){ 892 avrcp_send_cmd(connection, AVRCP_START_PACKET); 893 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 894 } else { 895 if (connection->cmd_operands_fragmented_len - connection->cmd_operands_fragmented_pos > avrcp_get_max_payload_size_for_packet_type(AVRCP_CONTINUE_PACKET)){ 896 avrcp_send_cmd(connection, AVRCP_CONTINUE_PACKET); 897 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 898 } else { 899 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 900 avrcp_send_cmd(connection, AVRCP_END_PACKET); 901 } 902 } 903 default: 904 return; 905 } 906 } 907 908 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 909 avrcp_connection_t * connection; 910 911 switch (packet_type) { 912 case L2CAP_DATA_PACKET: 913 connection = get_avrcp_connection_for_l2cap_signaling_cid(channel, &avrcp_controller_context); 914 if (!connection) break; 915 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 916 break; 917 case HCI_EVENT_PACKET: 918 switch (hci_event_packet_get_type(packet)){ 919 case L2CAP_EVENT_CAN_SEND_NOW: 920 connection = get_avrcp_connection_for_l2cap_signaling_cid(channel, &avrcp_controller_context); 921 if (!connection) break; 922 avrcp_controller_handle_can_send_now(connection); 923 break; 924 default: 925 avrcp_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 926 break; 927 } 928 default: 929 break; 930 } 931 } 932 933 void avrcp_controller_init(void){ 934 avrcp_controller_context.role = AVRCP_CONTROLLER; 935 avrcp_controller_context.connections = NULL; 936 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 937 l2cap_register_service(&avrcp_controller_packet_handler, BLUETOOTH_PROTOCOL_AVCTP, 0xffff, LEVEL_2); 938 } 939 940 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 941 if (callback == NULL){ 942 log_error("avrcp_register_packet_handler called with NULL callback"); 943 return; 944 } 945 avrcp_controller_context.avrcp_callback = callback; 946 } 947 948 uint8_t avrcp_controller_connect(bd_addr_t bd_addr, uint16_t * avrcp_cid){ 949 return avrcp_connect(bd_addr, &avrcp_controller_context, avrcp_cid); 950 } 951 952 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 953 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 954 if (!connection){ 955 log_error("avrcp_unit_info: could not find a connection."); 956 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 957 } 958 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 959 connection->state = AVCTP_W2_SEND_COMMAND; 960 961 connection->transaction_label++; 962 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 963 connection->command_type = AVRCP_CTYPE_STATUS; 964 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 965 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 966 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 967 connection->cmd_operands_length = 5; 968 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 969 return ERROR_CODE_SUCCESS; 970 } 971 972 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 973 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 974 if (!connection){ 975 log_error("avrcp_unit_info: could not find a connection."); 976 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 977 } 978 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 979 connection->state = AVCTP_W2_SEND_COMMAND; 980 981 connection->transaction_label++; 982 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 983 connection->command_type = AVRCP_CTYPE_STATUS; 984 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 985 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 986 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 987 connection->cmd_operands[0] = 7; // page: 0, extention_code: 7 988 connection->cmd_operands_length = 5; 989 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 990 return ERROR_CODE_SUCCESS; 991 } 992 993 static uint8_t avrcp_controller_get_capabilities(uint16_t avrcp_cid, uint8_t capability_id){ 994 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 995 if (!connection){ 996 log_error("avrcp_get_capabilities: could not find a connection."); 997 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 998 } 999 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1000 connection->state = AVCTP_W2_SEND_COMMAND; 1001 1002 connection->transaction_label++; 1003 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1004 connection->command_type = AVRCP_CTYPE_STATUS; 1005 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1006 connection->subunit_id = AVRCP_SUBUNIT_ID; 1007 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1008 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_CAPABILITIES; // PDU ID 1009 connection->cmd_operands[4] = 0; 1010 big_endian_store_16(connection->cmd_operands, 5, 1); // parameter length 1011 connection->cmd_operands[7] = capability_id; // capability ID 1012 connection->cmd_operands_length = 8; 1013 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1014 return ERROR_CODE_SUCCESS; 1015 } 1016 1017 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 1018 return avrcp_controller_get_capabilities(avrcp_cid, AVRCP_CAPABILITY_ID_COMPANY); 1019 } 1020 1021 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 1022 return avrcp_controller_get_capabilities(avrcp_cid, AVRCP_CAPABILITY_ID_EVENT); 1023 } 1024 1025 1026 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 1027 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1028 } 1029 1030 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 1031 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1032 } 1033 1034 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 1035 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1036 } 1037 1038 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 1039 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1040 } 1041 1042 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 1043 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1044 } 1045 1046 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 1047 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1048 } 1049 1050 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1051 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1052 } 1053 1054 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1055 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1056 } 1057 1058 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1059 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1060 } 1061 1062 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1063 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1064 } 1065 1066 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1067 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1068 } 1069 1070 1071 /* start cmds */ 1072 1073 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1074 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1075 if (!connection){ 1076 log_error("avrcp_stop_play: could not find a connection."); 1077 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1078 } 1079 if (connection->state != AVCTP_W4_STOP) return ERROR_CODE_COMMAND_DISALLOWED; 1080 return request_pass_through_release_control_cmd(connection); 1081 } 1082 1083 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1084 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1085 } 1086 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1087 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1088 } 1089 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1090 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1091 } 1092 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1093 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1094 } 1095 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1096 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1097 } 1098 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1099 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1100 } 1101 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1102 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1103 } 1104 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1105 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1106 } 1107 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1108 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1109 } 1110 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1111 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1112 } 1113 1114 1115 /* stop continuous cmds */ 1116 1117 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1118 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1119 if (!connection){ 1120 log_error("avrcp_get_play_status: could not find a connection."); 1121 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1122 } 1123 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1124 connection->state = AVCTP_W2_SEND_COMMAND; 1125 connection->transaction_label++; 1126 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1127 connection->command_type = AVRCP_CTYPE_STATUS; 1128 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1129 connection->subunit_id = AVRCP_SUBUNIT_ID; 1130 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1131 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_PLAY_STATUS; 1132 connection->cmd_operands[4] = 0; // reserved(upper 6) | packet_type -> 0 1133 big_endian_store_16(connection->cmd_operands, 5, 0); // parameter length 1134 connection->cmd_operands_length = 7; 1135 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1136 return ERROR_CODE_SUCCESS; 1137 } 1138 1139 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1140 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1141 if (!connection){ 1142 log_error("avrcp_get_play_status: could not find a connection."); 1143 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1144 } 1145 avrcp_register_notification(connection, event_id); 1146 return ERROR_CODE_SUCCESS; 1147 } 1148 1149 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1150 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1151 if (!connection){ 1152 log_error("avrcp_get_play_status: could not find a connection."); 1153 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1154 } 1155 connection->notifications_to_deregister |= (1 << event_id); 1156 return ERROR_CODE_SUCCESS; 1157 } 1158 1159 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1160 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1161 if (!connection){ 1162 log_error("avrcp_get_capabilities: could not find a connection."); 1163 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1164 } 1165 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1166 connection->state = AVCTP_W2_SEND_COMMAND; 1167 1168 connection->transaction_label++; 1169 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1170 connection->command_type = AVRCP_CTYPE_CONTROL; 1171 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1172 connection->subunit_id = AVRCP_SUBUNIT_ID; 1173 int pos = 0; 1174 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1175 pos += 3; 1176 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ADDRESSED_PLAYER; // PDU ID 1177 connection->cmd_operands[pos++] = 0; 1178 1179 // Parameter Length 1180 big_endian_store_16(connection->cmd_operands, pos, 2); 1181 pos += 2; 1182 1183 big_endian_store_16(connection->cmd_operands, pos, addressed_player_id); 1184 pos += 2; 1185 1186 connection->cmd_operands_length = pos; 1187 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1188 return ERROR_CODE_SUCCESS; 1189 } 1190 1191 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1192 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1193 if (!connection){ 1194 log_error("avrcp_get_capabilities: could not find a connection."); 1195 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1196 } 1197 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1198 connection->state = AVCTP_W2_SEND_COMMAND; 1199 1200 connection->transaction_label++; 1201 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1202 connection->command_type = AVRCP_CTYPE_STATUS; 1203 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1204 connection->subunit_id = AVRCP_SUBUNIT_ID; 1205 int pos = 0; 1206 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1207 pos += 3; 1208 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; // PDU ID 1209 connection->cmd_operands[pos++] = 0; 1210 1211 // Parameter Length 1212 big_endian_store_16(connection->cmd_operands, pos, 9); 1213 pos += 2; 1214 1215 // write 8 bytes value 1216 memset(connection->cmd_operands + pos, 0, 8); // identifier: PLAYING 1217 pos += 8; 1218 1219 connection->cmd_operands[pos++] = 0; // attribute count, if 0 get all attributes 1220 // every attribute is 4 bytes long 1221 1222 connection->cmd_operands_length = pos; 1223 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1224 return ERROR_CODE_SUCCESS; 1225 } 1226 1227 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1228 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1229 if (!connection){ 1230 log_error("avrcp_get_capabilities: could not find a connection."); 1231 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1232 } 1233 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1234 connection->state = AVCTP_W2_SEND_COMMAND; 1235 1236 connection->transaction_label++; 1237 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1238 connection->command_type = AVRCP_CTYPE_CONTROL; 1239 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1240 connection->subunit_id = AVRCP_SUBUNIT_ID; 1241 int pos = 0; 1242 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1243 pos += 3; 1244 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME; // PDU ID 1245 connection->cmd_operands[pos++] = 0; 1246 1247 // Parameter Length 1248 big_endian_store_16(connection->cmd_operands, pos, 1); 1249 pos += 2; 1250 connection->cmd_operands[pos++] = volume; 1251 1252 connection->cmd_operands_length = pos; 1253 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1254 return ERROR_CODE_SUCCESS; 1255 } 1256 1257 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 1258 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1259 if (!connection){ 1260 log_error("avrcp_get_capabilities: could not find a connection."); 1261 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1262 } 1263 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1264 connection->state = AVCTP_W2_SEND_COMMAND; 1265 1266 connection->transaction_label++; 1267 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1268 connection->command_type = AVRCP_CTYPE_STATUS; 1269 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1270 connection->subunit_id = AVRCP_SUBUNIT_ID; 1271 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1272 connection->cmd_operands[3] = AVRCP_PDU_ID_GetCurrentPlayerApplicationSettingValue; // PDU ID 1273 connection->cmd_operands[4] = 0; 1274 big_endian_store_16(connection->cmd_operands, 5, 5); // parameter length 1275 connection->cmd_operands[7] = 4; // NumPlayerApplicationSettingAttributeID 1276 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1277 connection->cmd_operands[8] = 0x01; // equalizer (1-OFF, 2-ON) 1278 connection->cmd_operands[9] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1279 connection->cmd_operands[10] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1280 connection->cmd_operands[11] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1281 connection->cmd_operands_length = 12; 1282 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1283 return ERROR_CODE_SUCCESS; 1284 } 1285 1286 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1287 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1288 if (!connection){ 1289 log_error("avrcp_get_capabilities: could not find a connection."); 1290 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1291 } 1292 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1293 connection->state = AVCTP_W2_SEND_COMMAND; 1294 1295 connection->transaction_label++; 1296 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1297 connection->command_type = AVRCP_CTYPE_CONTROL; 1298 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1299 connection->subunit_id = AVRCP_SUBUNIT_ID; 1300 int pos = 0; 1301 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1302 pos += 3; 1303 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SetPlayerApplicationSettingValue; // PDU ID 1304 connection->cmd_operands[pos++] = 0; 1305 // Parameter Length 1306 big_endian_store_16(connection->cmd_operands, pos, 3); 1307 pos += 2; 1308 connection->cmd_operands[pos++] = 2; 1309 connection->cmd_operands_length = pos; 1310 connection->cmd_operands[pos++] = attr_id; 1311 connection->cmd_operands[pos++] = attr_value; 1312 connection->cmd_operands_length = pos; 1313 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1314 return ERROR_CODE_SUCCESS; 1315 } 1316 1317 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1318 if (mode < AVRCP_SHUFFLE_MODE_OFF || mode > AVRCP_SHUFFLE_MODE_GROUP) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1319 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1320 } 1321 1322 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1323 if (mode < AVRCP_REPEAT_MODE_OFF || mode > AVRCP_REPEAT_MODE_GROUP) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1324 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1325 } 1326 1327 uint8_t avrcp_controller_disconnect(uint16_t avrcp_cid){ 1328 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1329 if (!connection){ 1330 log_error("avrcp_get_capabilities: could not find a connection."); 1331 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1332 } 1333 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1334 if (connection->browsing_connection){ 1335 if (connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1336 l2cap_disconnect(connection->browsing_connection->l2cap_browsing_cid, 0); 1337 } 1338 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1339 return ERROR_CODE_SUCCESS; 1340 } 1341 1342 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1343 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1344 if (!connection){ 1345 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1346 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1347 } 1348 if (connection->state != AVCTP_CONNECTION_OPENED){ 1349 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1350 return ERROR_CODE_COMMAND_DISALLOWED; 1351 } 1352 connection->state = AVCTP_W2_SEND_COMMAND; 1353 1354 connection->transaction_label++; 1355 connection->command_type = AVRCP_CTYPE_CONTROL; 1356 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1357 connection->subunit_id = AVRCP_SUBUNIT_ID; 1358 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1359 int pos = 0; 1360 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1361 pos += 3; 1362 connection->cmd_operands[pos++] = AVRCP_PDU_ID_PLAY_ITEM; // PDU ID 1363 // reserved 1364 connection->cmd_operands[pos++] = 0; 1365 // Parameter Length 1366 big_endian_store_16(connection->cmd_operands, pos, 11); 1367 pos += 2; 1368 connection->cmd_operands[pos++] = scope; 1369 memset(&connection->cmd_operands[pos], 0, 8); 1370 if (uid){ 1371 memcpy(&connection->cmd_operands[pos], uid, 8); 1372 } 1373 pos += 8; 1374 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1375 pos += 2; 1376 connection->cmd_operands_length = pos; 1377 1378 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1379 return ERROR_CODE_SUCCESS; 1380 } 1381 1382 uint8_t avrcp_controller_add_item_from_scope_to_now_playing_list(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1383 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1384 if (!connection){ 1385 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1386 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1387 } 1388 if (connection->state != AVCTP_CONNECTION_OPENED){ 1389 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1390 return ERROR_CODE_COMMAND_DISALLOWED; 1391 } 1392 connection->state = AVCTP_W2_SEND_COMMAND; 1393 1394 connection->transaction_label++; 1395 connection->command_type = AVRCP_CTYPE_CONTROL; 1396 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1397 connection->subunit_id = AVRCP_SUBUNIT_ID; 1398 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1399 int pos = 0; 1400 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1401 pos += 3; 1402 connection->cmd_operands[pos++] = AVRCP_PDU_ID_ADD_TO_NOW_PLAYING; // PDU ID 1403 // reserved 1404 connection->cmd_operands[pos++] = 0; 1405 // Parameter Length 1406 big_endian_store_16(connection->cmd_operands, pos, 11); 1407 pos += 2; 1408 connection->cmd_operands[pos++] = scope; 1409 memset(&connection->cmd_operands[pos], 0, 8); 1410 if (uid){ 1411 memcpy(&connection->cmd_operands[pos], uid, 8); 1412 } 1413 pos += 8; 1414 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1415 pos += 2; 1416 connection->cmd_operands_length = pos; 1417 1418 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1419 return ERROR_CODE_SUCCESS; 1420 } 1421 1422 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1423 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1424 if (!connection){ 1425 log_error("avrcp_controller_play_item: could not find a connection."); 1426 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1427 } 1428 connection->max_num_fragments = max_num_fragments; 1429 return ERROR_CODE_SUCCESS; 1430 } 1431 1432 uint8_t avrcp_controller_send_custom_command(uint16_t avrcp_cid, avrcp_command_type_t command_type, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t command_opcode, const uint8_t * command_buffer, uint16_t command_len){ 1433 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(avrcp_cid, &avrcp_controller_context); 1434 if (!connection){ 1435 log_error("avrcp_controller_play_item: could not find a connection."); 1436 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1437 } 1438 1439 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1440 connection->state = AVCTP_W2_SEND_FRAGMENTED_COMMAND; 1441 1442 connection->transaction_label++; 1443 connection->command_opcode = command_opcode; 1444 connection->command_type = command_type; 1445 connection->subunit_type = subunit_type; 1446 connection->subunit_id = subunit_id; 1447 connection->cmd_operands_fragmented_buffer = command_buffer; 1448 connection->cmd_operands_fragmented_pos = 0; 1449 connection->cmd_operands_fragmented_len = command_len; 1450 1451 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1452 return ERROR_CODE_SUCCESS; 1453 } 1454