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__ "avdtp_util.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "btstack.h" 44 #include "avdtp.h" 45 #include "avdtp_util.h" 46 47 #define MAX_MEDIA_CODEC_INFORMATION_LENGTH 100 48 49 50 /* 51 52 List of AVDTP_SUBEVENTs sorted by packet handler 53 54 55 Sink + Source: 56 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED 57 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED 58 - AVDTP_SUBEVENT_SIGNALING_SEP_FOUND 59 - AVDTP_SUBEVENT_SIGNALING_ACCEPT 60 - AVDTP_SUBEVENT_SIGNALING_REJECT 61 - AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT 62 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY 63 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY 64 - AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY 65 - AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY 66 - AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY 67 - AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY 68 - AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY 69 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY 70 - AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY 71 - AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE 72 - AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE 73 74 Source: 75 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT 76 77 Sink or Source based on SEP Type: 78 - AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED 79 - AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED 80 - AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW 81 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION 82 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION 83 84 */ 85 86 static const char * avdtp_si_name[] = { 87 "ERROR", 88 "AVDTP_SI_DISCOVER", 89 "AVDTP_SI_GET_CAPABILITIES", 90 "AVDTP_SI_SET_CONFIGURATION", 91 "AVDTP_SI_GET_CONFIGURATION", 92 "AVDTP_SI_RECONFIGURE", 93 "AVDTP_SI_OPEN", 94 "AVDTP_SI_START", 95 "AVDTP_SI_CLOSE", 96 "AVDTP_SI_SUSPEND", 97 "AVDTP_SI_ABORT", 98 "AVDTP_SI_SECURITY_CONTROL", 99 "AVDTP_SI_GET_ALL_CAPABILITIES", 100 "AVDTP_SI_DELAY_REPORT" 101 }; 102 const char * avdtp_si2str(uint16_t index){ 103 if ((index <= 0) || (index >= sizeof(avdtp_si_name)/sizeof(avdtp_si_name[0]) )) return avdtp_si_name[0]; 104 return avdtp_si_name[index]; 105 } 106 107 void avdtp_reset_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 108 stream_endpoint->media_con_handle = 0; 109 stream_endpoint->l2cap_media_cid = 0; 110 stream_endpoint->l2cap_reporting_cid = 0; 111 stream_endpoint->l2cap_recovery_cid = 0; 112 113 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 114 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 115 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 116 117 stream_endpoint->connection = NULL; 118 119 stream_endpoint->sep.in_use = 0; 120 memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); 121 122 stream_endpoint->remote_capabilities_bitmap = 0; 123 memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); 124 stream_endpoint->remote_configuration_bitmap = 0; 125 memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); 126 127 // temporary reconfigure SBC config used by A2DP 128 memset(stream_endpoint->reconfigure_media_codec_sbc_info, 0, 4); 129 130 stream_endpoint->media_disconnect = 0; 131 stream_endpoint->media_connect = 0; 132 stream_endpoint->start_stream = 0; 133 stream_endpoint->close_stream = 0; 134 stream_endpoint->request_can_send_now = 0; 135 stream_endpoint->abort_stream = 0; 136 stream_endpoint->suspend_stream = 0; 137 stream_endpoint->sequence_number = 0; 138 } 139 140 int get_bit16(uint16_t bitmap, int position){ 141 return (bitmap >> position) & 1; 142 } 143 144 uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 145 if (value){ 146 bitmap |= 1 << position; 147 } else { 148 bitmap &= ~ (1 << position); 149 } 150 return bitmap; 151 } 152 153 avdtp_message_type_t avdtp_get_signaling_packet_type(uint8_t * packet){ 154 return (avdtp_message_type_t) (packet[0] & 0x03); 155 } 156 157 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 158 int pos = 0; 159 if (size < 2) return pos; 160 signaling_header->transaction_label = packet[pos] >> 4; 161 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 162 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 163 pos++; 164 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 165 switch (signaling_header->packet_type){ 166 case AVDTP_SINGLE_PACKET: 167 signaling_header->num_packets = 0; 168 signaling_header->offset = 0; 169 signaling_header->size = 0; 170 break; 171 case AVDTP_END_PACKET: 172 signaling_header->num_packets = 0; 173 break; 174 case AVDTP_START_PACKET: 175 signaling_header->num_packets = packet[pos++]; 176 signaling_header->size = 0; 177 signaling_header->offset = 0; 178 break; 179 case AVDTP_CONTINUE_PACKET: 180 if (signaling_header->num_packets <= 0) { 181 log_info(" ERROR: wrong num fragmented packets\n"); 182 break; 183 } 184 signaling_header->num_packets--; 185 break; 186 } 187 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 188 return pos; 189 } 190 191 static bool avdtp_is_basic_capability(int service_category){ 192 return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); 193 } 194 195 int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { 196 UNUSED(size); 197 198 int i; 199 // pos = 0 reserved for length 200 int pos = 1; 201 switch(category){ 202 case AVDTP_MEDIA_TRANSPORT: 203 case AVDTP_REPORTING: 204 case AVDTP_DELAY_REPORTING: 205 break; 206 case AVDTP_RECOVERY: 207 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 208 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 209 buffer[pos++] = caps.recovery.maximum_number_media_packets; 210 break; 211 case AVDTP_CONTENT_PROTECTION: 212 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 213 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 214 pos += 2; 215 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 216 caps.content_protection.cp_type_value_len); 217 pos += caps.content_protection.cp_type_value_len; 218 break; 219 case AVDTP_HEADER_COMPRESSION: 220 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 221 break; 222 case AVDTP_MULTIPLEXING: 223 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 224 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 225 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 226 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 227 // media, reporting. recovery 228 } 229 break; 230 case AVDTP_MEDIA_CODEC: 231 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 232 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 233 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 234 buffer[pos++] = caps.media_codec.media_codec_information[i]; 235 } 236 break; 237 default: 238 break; 239 } 240 buffer[0] = pos - 1; // length 241 return pos; 242 } 243 244 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_service_category_t category, uint8_t cap_len){ 245 connection->error_code = 0; 246 247 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 248 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 249 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 250 connection->reject_service_category = category; 251 connection->error_code = BAD_SERV_CATEGORY; 252 return 1; 253 } 254 255 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 256 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 257 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 258 connection->reject_service_category = category; 259 connection->error_code = INVALID_CAPABILITIES; 260 return 1; 261 } 262 } 263 264 switch(category){ 265 case AVDTP_MEDIA_TRANSPORT: 266 if (cap_len != 0){ 267 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 268 connection->reject_service_category = category; 269 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 270 return 1; 271 } 272 break; 273 case AVDTP_REPORTING: 274 case AVDTP_DELAY_REPORTING: 275 if (cap_len != 0){ 276 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 277 connection->reject_service_category = category; 278 connection->error_code = BAD_LENGTH; 279 return 1; 280 } 281 break; 282 case AVDTP_RECOVERY: 283 if (cap_len != 3){ 284 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 285 connection->reject_service_category = category; 286 connection->error_code = BAD_RECOVERY_FORMAT; 287 return 1; 288 } 289 break; 290 case AVDTP_CONTENT_PROTECTION: 291 if (cap_len < 2){ 292 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 293 connection->reject_service_category = category; 294 connection->error_code = BAD_CP_FORMAT; 295 return 1; 296 } 297 break; 298 case AVDTP_HEADER_COMPRESSION: 299 // TODO: find error code for bad header compression 300 if (cap_len != 1){ 301 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 302 connection->reject_service_category = category; 303 connection->error_code = BAD_RECOVERY_FORMAT; 304 return 1; 305 } 306 break; 307 case AVDTP_MULTIPLEXING: 308 break; 309 case AVDTP_MEDIA_CODEC: 310 break; 311 default: 312 break; 313 } 314 return 0; 315 } 316 317 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 318 319 int i; 320 321 uint16_t registered_service_categories = 0; 322 uint16_t to_process = size; 323 324 while (to_process >= 2){ 325 326 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 327 uint8_t cap_len = packet[1]; 328 packet += 2; 329 to_process -= 2; 330 331 if (cap_len > to_process){ 332 connection->reject_service_category = category; 333 connection->error_code = BAD_LENGTH; 334 return 0; 335 } 336 337 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 338 339 int category_valid = 1; 340 341 uint8_t * data = packet; 342 uint16_t pos = 0; 343 344 switch(category){ 345 case AVDTP_RECOVERY: 346 caps->recovery.recovery_type = data[pos++]; 347 caps->recovery.maximum_recovery_window_size = data[pos++]; 348 caps->recovery.maximum_number_media_packets = data[pos++]; 349 break; 350 case AVDTP_CONTENT_PROTECTION: 351 caps->content_protection.cp_type = big_endian_read_16(data, 0); 352 caps->content_protection.cp_type_value_len = cap_len - 2; 353 // connection->reject_service_category = category; 354 // connection->error_code = UNSUPPORTED_CONFIGURATION; 355 // support for content protection goes here 356 break; 357 case AVDTP_HEADER_COMPRESSION: 358 caps->header_compression.back_ch = (data[0] >> 7) & 1; 359 caps->header_compression.media = (data[0] >> 6) & 1; 360 caps->header_compression.recovery = (data[0] >> 5) & 1; 361 break; 362 case AVDTP_MULTIPLEXING: 363 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 364 // read [tsid, tcid] for media, reporting. recovery respectively 365 caps->multiplexing_mode.transport_identifiers_num = 3; 366 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 367 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 368 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 369 } 370 break; 371 case AVDTP_MEDIA_CODEC: 372 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 373 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 374 caps->media_codec.media_codec_information_len = cap_len - 2; 375 caps->media_codec.media_codec_information = &data[pos++]; 376 break; 377 case AVDTP_MEDIA_TRANSPORT: 378 case AVDTP_REPORTING: 379 case AVDTP_DELAY_REPORTING: 380 break; 381 default: 382 category_valid = 0; 383 break; 384 } 385 386 if (category_valid) { 387 registered_service_categories = store_bit16(registered_service_categories, category, 1); 388 } 389 390 packet += cap_len; 391 to_process -= cap_len; 392 } 393 394 return registered_service_categories; 395 } 396 397 void avdtp_prepare_capabilities(avdtp_signaling_packet_t * signaling_packet, uint8_t transaction_label, uint16_t service_categories, avdtp_capabilities_t capabilities, uint8_t identifier){ 398 if (signaling_packet->offset) return; 399 bool basic_capabilities_only = false; 400 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 401 int i; 402 403 signaling_packet->size = 0; 404 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 405 406 switch (identifier) { 407 case AVDTP_SI_GET_CAPABILITIES: 408 basic_capabilities_only = true; 409 break; 410 case AVDTP_SI_GET_ALL_CAPABILITIES: 411 break; 412 case AVDTP_SI_SET_CONFIGURATION: 413 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 414 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 415 signaling_packet->message_type = AVDTP_CMD_MSG; 416 break; 417 case AVDTP_SI_RECONFIGURE: 418 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 419 signaling_packet->message_type = AVDTP_CMD_MSG; 420 break; 421 default: 422 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 423 break; 424 } 425 426 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 427 int registered_category = get_bit16(service_categories, i); 428 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 429 // TODO: introduce bitmap of mandatory categories 430 if (i == AVDTP_MEDIA_TRANSPORT){ 431 registered_category = true; 432 } 433 } 434 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 435 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 436 registered_category = false; 437 } 438 439 if (registered_category){ 440 // service category 441 signaling_packet->command[signaling_packet->size++] = i; 442 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 443 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 444 } 445 } 446 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 447 signaling_packet->transaction_label = transaction_label; 448 } 449 450 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 451 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 452 int data_len = 0; 453 454 uint16_t offset = signaling_packet->offset; 455 uint16_t pos = 1; 456 457 if (offset == 0){ 458 if (signaling_packet->size <= (mtu - 2)){ 459 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 460 out_buffer[pos++] = signaling_packet->signal_identifier; 461 data_len = signaling_packet->size; 462 } else { 463 signaling_packet->packet_type = AVDTP_START_PACKET; 464 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 465 out_buffer[pos++] = signaling_packet->signal_identifier; 466 data_len = mtu - 3; 467 signaling_packet->offset = data_len; 468 } 469 } else { 470 int remaining_bytes = signaling_packet->size - offset; 471 if (remaining_bytes <= (mtu - 1)){ 472 signaling_packet->packet_type = AVDTP_END_PACKET; 473 data_len = remaining_bytes; 474 signaling_packet->offset = 0; 475 } else{ 476 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 477 data_len = mtu - 1; 478 signaling_packet->offset += data_len; 479 } 480 } 481 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 482 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 483 data_len); 484 pos += data_len; 485 return pos; 486 } 487 488 489 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { 490 uint8_t event[14]; 491 int pos = 0; 492 event[pos++] = HCI_EVENT_AVDTP_META; 493 event[pos++] = sizeof(event) - 2; 494 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 495 little_endian_store_16(event, pos, avdtp_cid); 496 pos += 2; 497 reverse_bd_addr(addr,&event[pos]); 498 pos += 6; 499 little_endian_store_16(event, pos, con_handle); 500 pos += 2; 501 event[pos++] = status; 502 avdtp_emit_sink_and_source(event, pos); 503 } 504 505 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 506 uint8_t event[5]; 507 int pos = 0; 508 event[pos++] = HCI_EVENT_AVDTP_META; 509 event[pos++] = sizeof(event) - 2; 510 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 511 little_endian_store_16(event, pos, avdtp_cid); 512 pos += 2; 513 avdtp_emit_sink_and_source(event, pos); 514 } 515 516 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 517 uint8_t event[9]; 518 int pos = 0; 519 event[pos++] = HCI_EVENT_AVDTP_META; 520 event[pos++] = sizeof(event) - 2; 521 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 522 little_endian_store_16(event, pos, avdtp_cid); 523 pos += 2; 524 event[pos++] = sep.seid; 525 event[pos++] = sep.in_use; 526 event[pos++] = sep.media_type; 527 event[pos++] = sep.type; 528 avdtp_emit_sink_and_source(event, pos); 529 } 530 531 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 532 uint8_t event[5]; 533 int pos = 0; 534 event[pos++] = HCI_EVENT_AVDTP_META; 535 event[pos++] = sizeof(event) - 2; 536 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 537 little_endian_store_16(event, pos, avdtp_cid); 538 pos += 2; 539 avdtp_emit_sink_and_source(event, pos); 540 } 541 542 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 543 uint8_t event[8]; 544 int pos = 0; 545 event[pos++] = HCI_EVENT_AVDTP_META; 546 event[pos++] = sizeof(event) - 2; 547 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 548 little_endian_store_16(event, pos, avdtp_cid); 549 pos += 2; 550 event[pos++] = local_seid; 551 event[pos++] = is_initiator ? 1 : 0; 552 event[pos++] = identifier; 553 avdtp_emit_sink_and_source(event, pos); 554 } 555 556 void avdtp_signaling_emit_accept_for_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator){ 557 uint8_t event[8]; 558 int pos = 0; 559 event[pos++] = HCI_EVENT_AVDTP_META; 560 event[pos++] = sizeof(event) - 2; 561 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 562 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 563 pos += 2; 564 event[pos++] = local_seid; 565 event[pos++] = is_initiator ? 1 : 0; 566 event[pos++] = identifier; 567 568 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 569 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 570 } 571 572 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 573 uint8_t event[8]; 574 int pos = 0; 575 event[pos++] = HCI_EVENT_AVDTP_META; 576 event[pos++] = sizeof(event) - 2; 577 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 578 little_endian_store_16(event, pos, avdtp_cid); 579 pos += 2; 580 event[pos++] = local_seid; 581 event[pos++] = is_initiator ? 1 : 0; 582 event[pos++] = identifier; 583 avdtp_emit_sink_and_source(event, pos); 584 } 585 586 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 587 uint8_t event[8]; 588 int pos = 0; 589 event[pos++] = HCI_EVENT_AVDTP_META; 590 event[pos++] = sizeof(event) - 2; 591 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 592 little_endian_store_16(event, pos, avdtp_cid); 593 pos += 2; 594 event[pos++] = local_seid; 595 event[pos++] = is_initiator ? 1 : 0; 596 event[pos++] = identifier; 597 avdtp_emit_sink_and_source(event, pos); 598 } 599 600 static inline void 601 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 602 uint8_t event[7]; 603 int pos = 0; 604 event[pos++] = HCI_EVENT_AVDTP_META; 605 event[pos++] = sizeof(event) - 2; 606 event[pos++] = capability_subevent_id; 607 little_endian_store_16(event, pos, avdtp_cid); 608 pos += 2; 609 event[pos++] = local_seid; 610 event[pos++] = remote_seid; 611 avdtp_emit_sink_and_source(event, pos); 612 } 613 614 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 615 adtvp_media_codec_capabilities_t media_codec) { 616 uint8_t event[15]; 617 int pos = 0; 618 event[pos++] = HCI_EVENT_AVDTP_META; 619 event[pos++] = sizeof(event) - 2; 620 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 621 little_endian_store_16(event, pos, avdtp_cid); 622 pos += 2; 623 event[pos++] = local_seid; 624 event[pos++] = remote_seid; 625 event[pos++] = media_codec.media_type; 626 event[pos++] = media_codec.media_codec_information[0] >> 4; 627 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 628 event[pos++] = media_codec.media_codec_information[1] >> 4; 629 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 630 event[pos++] = media_codec.media_codec_information[1] & 0x03; 631 event[pos++] = media_codec.media_codec_information[2]; 632 event[pos++] = media_codec.media_codec_information[3]; 633 avdtp_emit_sink_and_source(event, pos); 634 } 635 636 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 637 adtvp_media_codec_capabilities_t media_codec) { 638 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 12]; 639 int pos = 0; 640 event[pos++] = HCI_EVENT_AVDTP_META; 641 event[pos++] = sizeof(event) - 2; 642 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 643 little_endian_store_16(event, pos, avdtp_cid); 644 pos += 2; 645 event[pos++] = local_seid; 646 event[pos++] = remote_seid; 647 event[pos++] = media_codec.media_type; 648 little_endian_store_16(event, pos, media_codec.media_codec_type); 649 pos += 2; 650 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 651 pos += 2; 652 (void)memcpy(event + pos, media_codec.media_codec_information, 653 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 654 avdtp_emit_sink_and_source(event, pos); 655 } 656 657 static void 658 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 659 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, local_seid, 660 remote_seid); 661 } 662 663 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 664 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, local_seid, remote_seid); 665 } 666 667 static void 668 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 669 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, local_seid, 670 remote_seid); 671 } 672 673 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 674 avdtp_recovery_capabilities_t *recovery) { 675 uint8_t event[10]; 676 int pos = 0; 677 event[pos++] = HCI_EVENT_AVDTP_META; 678 event[pos++] = sizeof(event) - 2; 679 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 680 little_endian_store_16(event, pos, avdtp_cid); 681 pos += 2; 682 event[pos++] = local_seid; 683 event[pos++] = remote_seid; 684 event[pos++] = recovery->recovery_type; 685 event[pos++] = recovery->maximum_recovery_window_size; 686 event[pos++] = recovery->maximum_number_media_packets; 687 avdtp_emit_sink_and_source(event, pos); 688 } 689 690 static void 691 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 692 adtvp_content_protection_t *content_protection) { 693 uint8_t event[22]; 694 int pos = 0; 695 event[pos++] = HCI_EVENT_AVDTP_META; 696 event[pos++] = sizeof(event) - 2; 697 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 698 little_endian_store_16(event, pos, avdtp_cid); 699 pos += 2; 700 event[pos++] = local_seid; 701 event[pos++] = remote_seid; 702 703 little_endian_store_16(event, pos, content_protection->cp_type); 704 pos += 2; 705 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 706 pos += 2; 707 708 //TODO: reserve place for value 709 if (content_protection->cp_type_value_len < 10){ 710 (void)memcpy(event + pos, content_protection->cp_type_value, 711 content_protection->cp_type_value_len); 712 } 713 avdtp_emit_sink_and_source(event, pos); 714 } 715 716 717 static void 718 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 719 avdtp_header_compression_capabilities_t *header_compression) { 720 uint8_t event[10]; 721 int pos = 0; 722 event[pos++] = HCI_EVENT_AVDTP_META; 723 event[pos++] = sizeof(event) - 2; 724 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 725 little_endian_store_16(event, pos, avdtp_cid); 726 pos += 2; 727 event[pos++] = local_seid; 728 event[pos++] = remote_seid; 729 event[pos++] = header_compression->back_ch; 730 event[pos++] = header_compression->media; 731 event[pos++] = header_compression->recovery; 732 avdtp_emit_sink_and_source(event, pos); 733 } 734 735 static void 736 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 737 avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 738 uint8_t event[15]; 739 int pos = 0; 740 event[pos++] = HCI_EVENT_AVDTP_META; 741 event[pos++] = sizeof(event) - 2; 742 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 743 little_endian_store_16(event, pos, avdtp_cid); 744 pos += 2; 745 event[pos++] = local_seid; 746 event[pos++] = remote_seid; 747 748 event[pos++] = multiplexing_mode->fragmentation; 749 event[pos++] = multiplexing_mode->transport_identifiers_num; 750 751 int i; 752 for (i = 0; i < 3; i++){ 753 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 754 } 755 for (i = 0; i < 3; i++){ 756 event[pos++] = multiplexing_mode->tcid[i]; 757 } 758 avdtp_emit_sink_and_source(event, pos); 759 } 760 761 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 762 uint8_t event[7]; 763 int pos = 0; 764 event[pos++] = HCI_EVENT_AVDTP_META; 765 event[pos++] = sizeof(event) - 2; 766 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 767 little_endian_store_16(event, pos, avdtp_cid); 768 pos += 2; 769 event[pos++] = local_seid; 770 event[pos++] = remote_seid; 771 avdtp_emit_sink_and_source(event, pos); 772 } 773 774 // emit events for all capabilities incl. final done event 775 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 776 uint16_t registered_service_categories) { 777 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 778 switch (capabilities->media_codec.media_codec_type){ 779 case AVDTP_CODEC_SBC: 780 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 781 break; 782 default: 783 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 784 break; 785 } 786 } 787 788 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 789 avdtp_signaling_emit_media_transport_capability(avdtp_cid, local_seid, remote_seid); 790 } 791 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 792 avdtp_signaling_emit_reporting_capability(avdtp_cid, local_seid, remote_seid); 793 } 794 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 795 avdtp_signaling_emit_recovery_capability(avdtp_cid, local_seid, remote_seid, &capabilities->recovery); 796 } 797 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 798 avdtp_signaling_emit_content_protection_capability(avdtp_cid, local_seid, remote_seid, 799 &capabilities->content_protection); 800 } 801 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 802 avdtp_signaling_emit_header_compression_capability(avdtp_cid, local_seid, remote_seid, 803 &capabilities->header_compression); 804 } 805 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 806 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, local_seid, remote_seid, 807 &capabilities->multiplexing_mode); 808 } 809 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 810 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, local_seid, remote_seid); 811 } 812 avdtp_signaling_emit_capability_done(avdtp_cid, local_seid, remote_seid); 813 } 814 815 static void avdtp_signaling_emit_media_codec_sbc(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 816 avdtp_media_type_t media_type, const uint8_t *media_codec_information, 817 uint8_t reconfigure) { 818 819 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 820 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 821 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 822 823 uint8_t event[16 + 2]; 824 int pos = 0; 825 event[pos++] = HCI_EVENT_AVDTP_META; 826 event[pos++] = sizeof(event) - 2; 827 828 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 829 little_endian_store_16(event, pos, avdtp_cid); 830 pos += 2; 831 event[pos++] = local_seid; 832 event[pos++] = remote_seid; 833 event[pos++] = reconfigure; 834 835 836 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 837 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 838 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 839 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 840 841 uint8_t num_channels = 0; 842 if ((channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 843 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 844 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL)) { 845 num_channels = 2; 846 } else if (channel_mode_bitmap & AVDTP_SBC_MONO) { 847 num_channels = 1; 848 } 849 850 uint16_t sampling_frequency = 0; 851 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 852 sampling_frequency = 48000; 853 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 854 sampling_frequency = 44100; 855 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 856 sampling_frequency = 32000; 857 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 858 sampling_frequency = 16000; 859 } 860 861 uint8_t subbands = 0; 862 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 863 subbands = 8; 864 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 865 subbands = 4; 866 } 867 868 uint8_t block_length = 0; 869 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 870 block_length = 16; 871 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 872 block_length = 12; 873 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 874 block_length = 8; 875 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 876 block_length = 4; 877 } 878 879 event[pos++] = media_type; 880 little_endian_store_16(event, pos, sampling_frequency); 881 pos += 2; 882 883 event[pos++] = channel_mode_bitmap; 884 event[pos++] = num_channels; 885 event[pos++] = block_length; 886 event[pos++] = subbands; 887 event[pos++] = media_codec_information[1] & 0x03; 888 event[pos++] = media_codec_information[2]; 889 event[pos++] = media_codec_information[3]; 890 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 891 } 892 893 static void avdtp_signaling_emit_media_codec_other(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 894 adtvp_media_codec_capabilities_t * media_codec, uint8_t reconfigure) { 895 896 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 897 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 898 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 899 900 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 901 int pos = 0; 902 event[pos++] = HCI_EVENT_AVDTP_META; 903 event[pos++] = sizeof(event) - 2; 904 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 905 little_endian_store_16(event, pos, avdtp_cid); 906 pos += 2; 907 event[pos++] = local_seid; 908 event[pos++] = remote_seid; 909 event[pos++] = reconfigure; 910 event[pos++] = media_codec->media_type; 911 little_endian_store_16(event, pos, media_codec->media_codec_type); 912 pos += 2; 913 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 914 pos += 2; 915 916 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 917 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 918 919 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 920 } 921 922 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 923 uint8_t event[8]; 924 int pos = 0; 925 event[pos++] = HCI_EVENT_AVDTP_META; 926 event[pos++] = sizeof(event) - 2; 927 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 928 little_endian_store_16(event, pos, avdtp_cid); 929 pos += 2; 930 event[pos++] = local_seid; 931 little_endian_store_16(event, pos, delay); 932 pos += 2; 933 avdtp_emit_source(event, sizeof(event)); 934 } 935 936 void avdtp_signaling_emit_media_codec_sbc_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 937 avdtp_media_type_t media_type, 938 const uint8_t *media_codec_information) { 939 avdtp_signaling_emit_media_codec_sbc(stream_endpoint, avdtp_cid, media_type, 940 media_codec_information, 0); 941 } 942 943 void avdtp_signaling_emit_media_codec_other_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 944 adtvp_media_codec_capabilities_t * media_codec) { 945 avdtp_signaling_emit_media_codec_other(stream_endpoint, avdtp_cid, media_codec, 0); 946 } 947 948 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 949 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 950 951 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 952 switch (configuration->media_codec.media_codec_type){ 953 case AVDTP_CODEC_SBC: 954 avdtp_signaling_emit_media_codec_sbc_configuration( 955 stream_endpoint, avdtp_cid, 956 configuration->media_codec.media_type, 957 configuration->media_codec.media_codec_information); 958 break; 959 default: 960 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, avdtp_cid, 961 &configuration->media_codec); 962 break; 963 } 964 } 965 } 966 967 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 968 uint8_t event[14]; 969 int pos = 0; 970 event[pos++] = HCI_EVENT_AVDTP_META; 971 event[pos++] = sizeof(event) - 2; 972 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 973 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 974 pos += 2; 975 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 976 pos += 6; 977 event[pos++] = avdtp_local_seid(stream_endpoint); 978 event[pos++] = avdtp_remote_seid(stream_endpoint); 979 event[pos++] = status; 980 981 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 982 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 983 } 984 985 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 986 uint8_t event[6]; 987 int pos = 0; 988 event[pos++] = HCI_EVENT_AVDTP_META; 989 event[pos++] = sizeof(event) - 2; 990 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 991 little_endian_store_16(event, pos, avdtp_cid); 992 pos += 2; 993 event[pos++] = local_seid; 994 995 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 996 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 997 } 998 999 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 1000 uint8_t event[8]; 1001 int pos = 0; 1002 event[pos++] = HCI_EVENT_AVDTP_META; 1003 event[pos++] = sizeof(event) - 2; 1004 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 1005 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1006 pos += 2; 1007 event[pos++] = avdtp_local_seid(stream_endpoint); 1008 little_endian_store_16(event, pos, sequence_number); 1009 pos += 2; 1010 1011 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1012 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1013 } 1014 1015 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1016 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1017 connection->wait_to_send_acceptor = 1; 1018 l2cap_request_can_send_now_event(l2cap_cid); 1019 return ERROR_CODE_SUCCESS; 1020 } 1021 1022 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1023 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1024 connection->wait_to_send_initiator = 1; 1025 l2cap_request_can_send_now_event(l2cap_cid); 1026 return ERROR_CODE_SUCCESS; 1027 } 1028 1029 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1030 if (!stream_endpoint) return 0; 1031 return stream_endpoint->sep.seid; 1032 1033 } 1034 1035 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1036 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1037 return stream_endpoint->remote_sep.seid; 1038 } 1039 1040 // helper for A2DP 1041 1042 void a2dp_replace_subevent_id_and_emit_cmd(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t subevent_id){ 1043 UNUSED(size); 1044 btstack_assert(callback != NULL); 1045 packet[0] = HCI_EVENT_A2DP_META; 1046 packet[2] = subevent_id; 1047 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1048 } 1049 1050 void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t subevent_id){ 1051 uint8_t event[6]; 1052 int pos = 0; 1053 event[pos++] = HCI_EVENT_A2DP_META; 1054 event[pos++] = sizeof(event) - 2; 1055 event[pos++] = subevent_id; 1056 little_endian_store_16(event, pos, cid); 1057 pos += 2; 1058 event[pos++] = local_seid; 1059 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1060 } 1061