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 SBC config used by A2DP Source 128 memset(stream_endpoint->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 default: 187 btstack_assert(false); 188 break; 189 } 190 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 191 return pos; 192 } 193 194 static bool avdtp_is_basic_capability(int service_category){ 195 return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); 196 } 197 198 int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { 199 UNUSED(size); 200 201 int i; 202 // pos = 0 reserved for length 203 int pos = 1; 204 switch(category){ 205 case AVDTP_MEDIA_TRANSPORT: 206 case AVDTP_REPORTING: 207 case AVDTP_DELAY_REPORTING: 208 break; 209 case AVDTP_RECOVERY: 210 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 211 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 212 buffer[pos++] = caps.recovery.maximum_number_media_packets; 213 break; 214 case AVDTP_CONTENT_PROTECTION: 215 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 216 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 217 pos += 2; 218 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 219 caps.content_protection.cp_type_value_len); 220 pos += caps.content_protection.cp_type_value_len; 221 break; 222 case AVDTP_HEADER_COMPRESSION: 223 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 224 break; 225 case AVDTP_MULTIPLEXING: 226 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 227 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 228 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 229 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 230 // media, reporting. recovery 231 } 232 break; 233 case AVDTP_MEDIA_CODEC: 234 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 235 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 236 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 237 buffer[pos++] = caps.media_codec.media_codec_information[i]; 238 } 239 break; 240 default: 241 break; 242 } 243 buffer[0] = pos - 1; // length 244 return pos; 245 } 246 247 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){ 248 connection->error_code = 0; 249 250 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 251 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 252 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 253 connection->reject_service_category = category; 254 connection->error_code = BAD_SERV_CATEGORY; 255 return 1; 256 } 257 258 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 259 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 260 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 261 connection->reject_service_category = category; 262 connection->error_code = INVALID_CAPABILITIES; 263 return 1; 264 } 265 } 266 267 switch(category){ 268 case AVDTP_MEDIA_TRANSPORT: 269 if (cap_len != 0){ 270 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 271 connection->reject_service_category = category; 272 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 273 return 1; 274 } 275 break; 276 case AVDTP_REPORTING: 277 case AVDTP_DELAY_REPORTING: 278 if (cap_len != 0){ 279 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 280 connection->reject_service_category = category; 281 connection->error_code = BAD_LENGTH; 282 return 1; 283 } 284 break; 285 case AVDTP_RECOVERY: 286 if (cap_len != 3){ 287 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 288 connection->reject_service_category = category; 289 connection->error_code = BAD_RECOVERY_FORMAT; 290 return 1; 291 } 292 break; 293 case AVDTP_CONTENT_PROTECTION: 294 if (cap_len < 2){ 295 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 296 connection->reject_service_category = category; 297 connection->error_code = BAD_CP_FORMAT; 298 return 1; 299 } 300 break; 301 case AVDTP_HEADER_COMPRESSION: 302 // TODO: find error code for bad header compression 303 if (cap_len != 1){ 304 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 305 connection->reject_service_category = category; 306 connection->error_code = BAD_RECOVERY_FORMAT; 307 return 1; 308 } 309 break; 310 case AVDTP_MULTIPLEXING: 311 break; 312 case AVDTP_MEDIA_CODEC: 313 break; 314 default: 315 break; 316 } 317 return 0; 318 } 319 320 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){ 321 322 int i; 323 324 uint16_t registered_service_categories = 0; 325 uint16_t to_process = size; 326 327 while (to_process >= 2){ 328 329 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 330 uint8_t cap_len = packet[1]; 331 packet += 2; 332 to_process -= 2; 333 334 if (cap_len > to_process){ 335 connection->reject_service_category = category; 336 connection->error_code = BAD_LENGTH; 337 return 0; 338 } 339 340 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 341 342 int category_valid = 1; 343 344 uint8_t * data = packet; 345 uint16_t pos = 0; 346 347 switch(category){ 348 case AVDTP_RECOVERY: 349 caps->recovery.recovery_type = data[pos++]; 350 caps->recovery.maximum_recovery_window_size = data[pos++]; 351 caps->recovery.maximum_number_media_packets = data[pos++]; 352 break; 353 case AVDTP_CONTENT_PROTECTION: 354 caps->content_protection.cp_type = big_endian_read_16(data, 0); 355 caps->content_protection.cp_type_value_len = cap_len - 2; 356 // connection->reject_service_category = category; 357 // connection->error_code = UNSUPPORTED_CONFIGURATION; 358 // support for content protection goes here 359 break; 360 case AVDTP_HEADER_COMPRESSION: 361 caps->header_compression.back_ch = (data[0] >> 7) & 1; 362 caps->header_compression.media = (data[0] >> 6) & 1; 363 caps->header_compression.recovery = (data[0] >> 5) & 1; 364 break; 365 case AVDTP_MULTIPLEXING: 366 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 367 // read [tsid, tcid] for media, reporting. recovery respectively 368 caps->multiplexing_mode.transport_identifiers_num = 3; 369 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 370 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 371 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 372 } 373 break; 374 case AVDTP_MEDIA_CODEC: 375 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 376 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 377 caps->media_codec.media_codec_information_len = cap_len - 2; 378 caps->media_codec.media_codec_information = &data[pos++]; 379 break; 380 case AVDTP_MEDIA_TRANSPORT: 381 case AVDTP_REPORTING: 382 case AVDTP_DELAY_REPORTING: 383 break; 384 default: 385 category_valid = 0; 386 break; 387 } 388 389 if (category_valid) { 390 registered_service_categories = store_bit16(registered_service_categories, category, 1); 391 } 392 393 packet += cap_len; 394 to_process -= cap_len; 395 } 396 397 return registered_service_categories; 398 } 399 400 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){ 401 if (signaling_packet->offset) return; 402 bool basic_capabilities_only = false; 403 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 404 int i; 405 406 signaling_packet->size = 0; 407 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 408 409 switch (identifier) { 410 case AVDTP_SI_GET_CAPABILITIES: 411 basic_capabilities_only = true; 412 break; 413 case AVDTP_SI_GET_ALL_CAPABILITIES: 414 break; 415 case AVDTP_SI_SET_CONFIGURATION: 416 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 417 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 418 signaling_packet->message_type = AVDTP_CMD_MSG; 419 break; 420 case AVDTP_SI_RECONFIGURE: 421 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 422 signaling_packet->message_type = AVDTP_CMD_MSG; 423 break; 424 default: 425 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 426 break; 427 } 428 429 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 430 int registered_category = get_bit16(service_categories, i); 431 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 432 // TODO: introduce bitmap of mandatory categories 433 if (i == AVDTP_MEDIA_TRANSPORT){ 434 registered_category = true; 435 } 436 } 437 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 438 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 439 registered_category = false; 440 } 441 442 if (registered_category){ 443 // service category 444 signaling_packet->command[signaling_packet->size++] = i; 445 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 446 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 447 } 448 } 449 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 450 signaling_packet->transaction_label = transaction_label; 451 } 452 453 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 454 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 455 int data_len = 0; 456 457 uint16_t offset = signaling_packet->offset; 458 uint16_t pos = 1; 459 460 if (offset == 0){ 461 if (signaling_packet->size <= (mtu - 2)){ 462 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 463 out_buffer[pos++] = signaling_packet->signal_identifier; 464 data_len = signaling_packet->size; 465 } else { 466 signaling_packet->packet_type = AVDTP_START_PACKET; 467 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 468 out_buffer[pos++] = signaling_packet->signal_identifier; 469 data_len = mtu - 3; 470 signaling_packet->offset = data_len; 471 } 472 } else { 473 int remaining_bytes = signaling_packet->size - offset; 474 if (remaining_bytes <= (mtu - 1)){ 475 signaling_packet->packet_type = AVDTP_END_PACKET; 476 data_len = remaining_bytes; 477 signaling_packet->offset = 0; 478 } else{ 479 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 480 data_len = mtu - 1; 481 signaling_packet->offset += data_len; 482 } 483 } 484 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 485 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 486 data_len); 487 pos += data_len; 488 return pos; 489 } 490 491 492 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { 493 uint8_t event[14]; 494 int pos = 0; 495 event[pos++] = HCI_EVENT_AVDTP_META; 496 event[pos++] = sizeof(event) - 2; 497 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 498 little_endian_store_16(event, pos, avdtp_cid); 499 pos += 2; 500 reverse_bd_addr(addr,&event[pos]); 501 pos += 6; 502 little_endian_store_16(event, pos, con_handle); 503 pos += 2; 504 event[pos++] = status; 505 avdtp_emit_sink_and_source(event, pos); 506 } 507 508 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 509 uint8_t event[5]; 510 int pos = 0; 511 event[pos++] = HCI_EVENT_AVDTP_META; 512 event[pos++] = sizeof(event) - 2; 513 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 514 little_endian_store_16(event, pos, avdtp_cid); 515 pos += 2; 516 avdtp_emit_sink_and_source(event, pos); 517 } 518 519 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 520 uint8_t event[9]; 521 int pos = 0; 522 event[pos++] = HCI_EVENT_AVDTP_META; 523 event[pos++] = sizeof(event) - 2; 524 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 525 little_endian_store_16(event, pos, avdtp_cid); 526 pos += 2; 527 event[pos++] = sep.seid; 528 event[pos++] = sep.in_use; 529 event[pos++] = sep.media_type; 530 event[pos++] = sep.type; 531 avdtp_emit_sink_and_source(event, pos); 532 } 533 534 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 535 uint8_t event[5]; 536 int pos = 0; 537 event[pos++] = HCI_EVENT_AVDTP_META; 538 event[pos++] = sizeof(event) - 2; 539 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 540 little_endian_store_16(event, pos, avdtp_cid); 541 pos += 2; 542 avdtp_emit_sink_and_source(event, pos); 543 } 544 545 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 546 uint8_t event[8]; 547 int pos = 0; 548 event[pos++] = HCI_EVENT_AVDTP_META; 549 event[pos++] = sizeof(event) - 2; 550 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 551 little_endian_store_16(event, pos, avdtp_cid); 552 pos += 2; 553 event[pos++] = local_seid; 554 event[pos++] = is_initiator ? 1 : 0; 555 event[pos++] = identifier; 556 avdtp_emit_sink_and_source(event, pos); 557 } 558 559 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){ 560 uint8_t event[8]; 561 int pos = 0; 562 event[pos++] = HCI_EVENT_AVDTP_META; 563 event[pos++] = sizeof(event) - 2; 564 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 565 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 566 pos += 2; 567 event[pos++] = local_seid; 568 event[pos++] = is_initiator ? 1 : 0; 569 event[pos++] = identifier; 570 571 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 572 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 573 } 574 575 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 576 uint8_t event[8]; 577 int pos = 0; 578 event[pos++] = HCI_EVENT_AVDTP_META; 579 event[pos++] = sizeof(event) - 2; 580 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 581 little_endian_store_16(event, pos, avdtp_cid); 582 pos += 2; 583 event[pos++] = local_seid; 584 event[pos++] = is_initiator ? 1 : 0; 585 event[pos++] = identifier; 586 avdtp_emit_sink_and_source(event, pos); 587 } 588 589 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 590 uint8_t event[8]; 591 int pos = 0; 592 event[pos++] = HCI_EVENT_AVDTP_META; 593 event[pos++] = sizeof(event) - 2; 594 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 595 little_endian_store_16(event, pos, avdtp_cid); 596 pos += 2; 597 event[pos++] = local_seid; 598 event[pos++] = is_initiator ? 1 : 0; 599 event[pos++] = identifier; 600 avdtp_emit_sink_and_source(event, pos); 601 } 602 603 static inline void 604 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t remote_seid) { 605 uint8_t event[6]; 606 int pos = 0; 607 event[pos++] = HCI_EVENT_AVDTP_META; 608 event[pos++] = sizeof(event) - 2; 609 event[pos++] = capability_subevent_id; 610 little_endian_store_16(event, pos, avdtp_cid); 611 pos += 2; 612 event[pos++] = remote_seid; 613 avdtp_emit_sink_and_source(event, pos); 614 } 615 616 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 617 const uint8_t * media_codec_information = media_codec.media_codec_information; 618 uint8_t event[14]; 619 int pos = 0; 620 event[pos++] = HCI_EVENT_AVDTP_META; 621 event[pos++] = sizeof(event) - 2; 622 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 623 little_endian_store_16(event, pos, avdtp_cid); 624 pos += 2; 625 event[pos++] = remote_seid; 626 event[pos++] = media_codec.media_type; 627 event[pos++] = media_codec_information[0] >> 4; 628 event[pos++] = media_codec_information[0] & 0x0F; 629 event[pos++] = media_codec_information[1] >> 4; 630 event[pos++] = (media_codec_information[1] & 0x0F) >> 2; 631 event[pos++] = media_codec_information[1] & 0x03; 632 event[pos++] = media_codec_information[2]; 633 event[pos++] = media_codec_information[3]; 634 avdtp_emit_sink_and_source(event, pos); 635 } 636 637 static void avdtp_signaling_emit_media_codec_mpeg_audio_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 638 const uint8_t * media_codec_information = media_codec.media_codec_information; 639 uint8_t event[15]; 640 int pos = 0; 641 event[pos++] = HCI_EVENT_AVDTP_META; 642 event[pos++] = sizeof(event) - 2; 643 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY; 644 little_endian_store_16(event, pos, avdtp_cid); 645 pos += 2; 646 event[pos++] = remote_seid; 647 event[pos++] = media_codec.media_type; 648 649 uint8_t layer_bitmap = media_codec_information[0] >> 5; 650 uint8_t crc = (media_codec_information[0] >> 4) & 0x01; 651 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x07; 652 uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; 653 uint8_t sampling_frequency_bitmap = media_codec_information[1] & 0x3F; 654 uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; 655 uint16_t bit_rate_index_bitmap = ((media_codec_information[3] & 0x3f) << 8) | media_codec.media_codec_information[4]; 656 657 event[pos++] = layer_bitmap; 658 event[pos++] = crc; 659 event[pos++] = channel_mode_bitmap; 660 event[pos++] = mpf; 661 event[pos++] = sampling_frequency_bitmap; 662 event[pos++] = vbr; 663 little_endian_store_16(event, pos, bit_rate_index_bitmap); // bit rate index 664 pos += 2; 665 avdtp_emit_sink_and_source(event, pos); 666 } 667 668 static void avdtp_signaling_emit_media_codec_mpeg_aac_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 669 const uint8_t * media_codec_information = media_codec.media_codec_information; 670 uint8_t event[15]; 671 int pos = 0; 672 event[pos++] = HCI_EVENT_AVDTP_META; 673 event[pos++] = sizeof(event) - 2; 674 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY; 675 little_endian_store_16(event, pos, avdtp_cid); 676 pos += 2; 677 event[pos++] = remote_seid; 678 event[pos++] = media_codec.media_type; 679 680 uint8_t object_type_bitmap = media_codec_information[0]; 681 uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); 682 uint8_t channels_bitmap = (media_codec_information[2] >> 2) & 0x03; 683 uint32_t bit_rate_bitmap = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; 684 uint8_t vbr = media_codec_information[3] >> 7; 685 686 event[pos++] = object_type_bitmap; 687 little_endian_store_16(event, pos, sampling_frequency_bitmap); 688 pos += 2; 689 event[pos++] = channels_bitmap; 690 little_endian_store_24(event, pos, bit_rate_bitmap); 691 pos += 3; 692 event[pos++] = vbr; 693 694 avdtp_emit_sink_and_source(event, pos); 695 } 696 697 static void avdtp_signaling_emit_media_codec_atrac_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 698 const uint8_t * media_codec_information = media_codec.media_codec_information; 699 uint8_t event[16]; 700 int pos = 0; 701 event[pos++] = HCI_EVENT_AVDTP_META; 702 event[pos++] = sizeof(event) - 2; 703 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY; 704 little_endian_store_16(event, pos, avdtp_cid); 705 pos += 2; 706 event[pos++] = remote_seid; 707 event[pos++] = media_codec.media_type; 708 709 uint8_t version = media_codec_information[0] >> 5; 710 uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; 711 uint16_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; 712 uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; 713 uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; 714 uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; 715 716 event[pos++] = version; 717 event[pos++] = channel_mode_bitmap; 718 event[pos++] = sampling_frequency_bitmap; 719 event[pos++] = vbr; 720 little_endian_store_24(event, pos, bit_rate_index_bitmap); 721 pos += 3; 722 little_endian_store_16(event, pos, maximum_sul); 723 724 avdtp_emit_sink_and_source(event, pos); 725 } 726 727 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 728 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 11]; 729 int pos = 0; 730 event[pos++] = HCI_EVENT_AVDTP_META; 731 event[pos++] = sizeof(event) - 2; 732 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 733 little_endian_store_16(event, pos, avdtp_cid); 734 pos += 2; 735 event[pos++] = remote_seid; 736 event[pos++] = media_codec.media_type; 737 little_endian_store_16(event, pos, media_codec.media_codec_type); 738 pos += 2; 739 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 740 pos += 2; 741 (void)memcpy(event + pos, media_codec.media_codec_information, 742 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 743 avdtp_emit_sink_and_source(event, pos); 744 } 745 746 static void 747 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 748 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, 749 remote_seid); 750 } 751 752 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 753 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, remote_seid); 754 } 755 756 static void 757 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 758 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, 759 remote_seid); 760 } 761 762 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_recovery_capabilities_t *recovery) { 763 uint8_t event[9]; 764 int pos = 0; 765 event[pos++] = HCI_EVENT_AVDTP_META; 766 event[pos++] = sizeof(event) - 2; 767 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 768 little_endian_store_16(event, pos, avdtp_cid); 769 pos += 2; 770 event[pos++] = remote_seid; 771 event[pos++] = recovery->recovery_type; 772 event[pos++] = recovery->maximum_recovery_window_size; 773 event[pos++] = recovery->maximum_number_media_packets; 774 avdtp_emit_sink_and_source(event, pos); 775 } 776 777 static void 778 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_content_protection_t *content_protection) { 779 uint8_t event[21]; 780 int pos = 0; 781 event[pos++] = HCI_EVENT_AVDTP_META; 782 event[pos++] = sizeof(event) - 2; 783 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 784 little_endian_store_16(event, pos, avdtp_cid); 785 pos += 2; 786 event[pos++] = remote_seid; 787 788 little_endian_store_16(event, pos, content_protection->cp_type); 789 pos += 2; 790 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 791 pos += 2; 792 793 //TODO: reserve place for value 794 if (content_protection->cp_type_value_len < 10){ 795 (void)memcpy(event + pos, content_protection->cp_type_value, 796 content_protection->cp_type_value_len); 797 } 798 avdtp_emit_sink_and_source(event, pos); 799 } 800 801 802 static void 803 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_header_compression_capabilities_t *header_compression) { 804 uint8_t event[9]; 805 int pos = 0; 806 event[pos++] = HCI_EVENT_AVDTP_META; 807 event[pos++] = sizeof(event) - 2; 808 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 809 little_endian_store_16(event, pos, avdtp_cid); 810 pos += 2; 811 event[pos++] = remote_seid; 812 event[pos++] = header_compression->back_ch; 813 event[pos++] = header_compression->media; 814 event[pos++] = header_compression->recovery; 815 avdtp_emit_sink_and_source(event, pos); 816 } 817 818 static void 819 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 820 uint8_t event[14]; 821 int pos = 0; 822 event[pos++] = HCI_EVENT_AVDTP_META; 823 event[pos++] = sizeof(event) - 2; 824 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 825 little_endian_store_16(event, pos, avdtp_cid); 826 pos += 2; 827 event[pos++] = remote_seid; 828 829 event[pos++] = multiplexing_mode->fragmentation; 830 event[pos++] = multiplexing_mode->transport_identifiers_num; 831 832 int i; 833 for (i = 0; i < 3; i++){ 834 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 835 } 836 for (i = 0; i < 3; i++){ 837 event[pos++] = multiplexing_mode->tcid[i]; 838 } 839 avdtp_emit_sink_and_source(event, pos); 840 } 841 842 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t remote_seid) { 843 uint8_t event[6]; 844 int pos = 0; 845 event[pos++] = HCI_EVENT_AVDTP_META; 846 event[pos++] = sizeof(event) - 2; 847 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 848 little_endian_store_16(event, pos, avdtp_cid); 849 pos += 2; 850 event[pos++] = remote_seid; 851 avdtp_emit_sink_and_source(event, pos); 852 } 853 854 // emit events for all capabilities incl. final done event 855 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 856 uint16_t registered_service_categories) { 857 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 858 switch (capabilities->media_codec.media_codec_type){ 859 case AVDTP_CODEC_SBC: 860 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, remote_seid, capabilities->media_codec); 861 break; 862 case AVDTP_CODEC_MPEG_1_2_AUDIO: 863 avdtp_signaling_emit_media_codec_mpeg_audio_capability(avdtp_cid, remote_seid, capabilities->media_codec); 864 break; 865 case AVDTP_CODEC_MPEG_2_4_AAC: 866 avdtp_signaling_emit_media_codec_mpeg_aac_capability(avdtp_cid, remote_seid, capabilities->media_codec); 867 break; 868 case AVDTP_CODEC_ATRAC_FAMILY: 869 avdtp_signaling_emit_media_codec_atrac_capability(avdtp_cid, remote_seid, capabilities->media_codec); 870 break; 871 default: 872 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, remote_seid, capabilities->media_codec); 873 break; 874 } 875 } 876 877 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 878 avdtp_signaling_emit_media_transport_capability(avdtp_cid, remote_seid); 879 } 880 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 881 avdtp_signaling_emit_reporting_capability(avdtp_cid, remote_seid); 882 } 883 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 884 avdtp_signaling_emit_recovery_capability(avdtp_cid, remote_seid, &capabilities->recovery); 885 } 886 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 887 avdtp_signaling_emit_content_protection_capability(avdtp_cid, remote_seid, 888 &capabilities->content_protection); 889 } 890 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 891 avdtp_signaling_emit_header_compression_capability(avdtp_cid, remote_seid, 892 &capabilities->header_compression); 893 } 894 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 895 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, remote_seid, 896 &capabilities->multiplexing_mode); 897 } 898 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 899 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, remote_seid); 900 } 901 avdtp_signaling_emit_capability_done(avdtp_cid, remote_seid); 902 } 903 904 static void 905 avdtp_signaling_emit_media_codec_sbc(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, 906 avdtp_media_type_t media_type, const uint8_t *media_codec_information) { 907 908 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 909 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 910 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 911 912 uint8_t event[16 + 2]; 913 int pos = 0; 914 event[pos++] = HCI_EVENT_AVDTP_META; 915 event[pos++] = sizeof(event) - 2; 916 917 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 918 little_endian_store_16(event, pos, avdtp_cid); 919 pos += 2; 920 event[pos++] = local_seid; 921 event[pos++] = remote_seid; 922 event[pos++] = reconfigure; 923 924 925 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 926 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 927 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 928 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 929 930 uint8_t num_channels = 0; 931 if ((channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 932 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 933 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL)) { 934 num_channels = 2; 935 } else if (channel_mode_bitmap & AVDTP_SBC_MONO) { 936 num_channels = 1; 937 } 938 939 uint16_t sampling_frequency = 0; 940 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 941 sampling_frequency = 48000; 942 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 943 sampling_frequency = 44100; 944 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 945 sampling_frequency = 32000; 946 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 947 sampling_frequency = 16000; 948 } 949 950 uint8_t subbands = 0; 951 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 952 subbands = 8; 953 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 954 subbands = 4; 955 } 956 957 uint8_t block_length = 0; 958 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 959 block_length = 16; 960 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 961 block_length = 12; 962 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 963 block_length = 8; 964 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 965 block_length = 4; 966 } 967 968 event[pos++] = media_type; 969 little_endian_store_16(event, pos, sampling_frequency); 970 pos += 2; 971 972 event[pos++] = channel_mode_bitmap; 973 event[pos++] = num_channels; 974 event[pos++] = block_length; 975 event[pos++] = subbands; 976 event[pos++] = media_codec_information[1] & 0x03; 977 event[pos++] = media_codec_information[2]; 978 event[pos++] = media_codec_information[3]; 979 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 980 } 981 982 static void 983 avdtp_signaling_emit_media_codec_mpeg_audio_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 984 uint8_t reconfigure, avdtp_media_type_t media_type, 985 const uint8_t *media_codec_information) { 986 987 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 988 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 989 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 990 991 uint8_t event[18]; 992 int pos = 0; 993 event[pos++] = HCI_EVENT_AVDTP_META; 994 event[pos++] = sizeof(event) - 2; 995 996 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION; 997 little_endian_store_16(event, pos, avdtp_cid); 998 pos += 2; 999 event[pos++] = local_seid; 1000 event[pos++] = remote_seid; 1001 event[pos++] = reconfigure; 1002 1003 uint8_t layer_bitmap = media_codec_information[0] >> 5; 1004 uint8_t crc = (media_codec_information[0] >> 4) & 0x01; 1005 uint8_t channel_mode_bitmap = (media_codec_information[0] & 0x07); 1006 uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; 1007 uint8_t sampling_frequency_bitmap = (media_codec_information[1] & 0x3F); 1008 uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; 1009 uint16_t bit_rate_index_bitmap = ((media_codec_information[2] & 0x3f) << 8) | media_codec_information[3]; 1010 1011 uint8_t layer = 0; 1012 if (layer_bitmap & 0x04){ 1013 layer = AVDTP_MPEG_LAYER_1; 1014 } else if (layer_bitmap & 0x02){ 1015 layer = AVDTP_MPEG_LAYER_2; 1016 } else if (layer_bitmap & 0x01){ 1017 layer = AVDTP_MPEG_LAYER_3; 1018 } 1019 1020 uint8_t num_channels = 0; 1021 avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1022 if (channel_mode_bitmap & 0x08){ 1023 num_channels = 1; 1024 channel_mode = AVDTP_CHANNEL_MODE_MONO; 1025 } else if (channel_mode_bitmap & 0x04){ 1026 num_channels = 2; 1027 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1028 } else if (channel_mode_bitmap & 0x02){ 1029 num_channels = 2; 1030 channel_mode = AVDTP_CHANNEL_MODE_STEREO; 1031 } else if (channel_mode_bitmap & 0x02){ 1032 num_channels = 2; 1033 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1034 } 1035 1036 uint16_t sampling_frequency = 0; 1037 if (sampling_frequency_bitmap & 0x01) { 1038 sampling_frequency = 48000; 1039 } else if (sampling_frequency_bitmap & 0x02) { 1040 sampling_frequency = 44100; 1041 } else if (sampling_frequency_bitmap & 0x04) { 1042 sampling_frequency = 32000; 1043 } else if (sampling_frequency_bitmap & 0x08) { 1044 sampling_frequency = 24000; 1045 } else if (sampling_frequency_bitmap & 0x10) { 1046 sampling_frequency = 22050; 1047 } else if (sampling_frequency_bitmap & 0x20) { 1048 sampling_frequency = 16000; 1049 } 1050 1051 uint8_t bitrate_index = 0; 1052 uint8_t i; 1053 for (i=0;i<14;i++){ 1054 if (bit_rate_index_bitmap & (1U << i)) { 1055 bitrate_index = i; 1056 } 1057 } 1058 1059 event[pos++] = media_type; 1060 event[pos++] = (uint8_t) layer; 1061 event[pos++] = crc; 1062 event[pos++] = (uint8_t) channel_mode; 1063 event[pos++] = num_channels; 1064 event[pos++] = mpf; 1065 little_endian_store_16(event, pos, sampling_frequency); 1066 pos += 2; 1067 event[pos++] = vbr; 1068 event[pos++] = bitrate_index; 1069 1070 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1071 } 1072 1073 1074 static void 1075 avdtp_signaling_emit_media_codec_mpeg_aac_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 1076 uint8_t reconfigure, avdtp_media_type_t media_type, 1077 const uint8_t *media_codec_information) { 1078 1079 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1080 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1081 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1082 1083 uint8_t event[18]; 1084 int pos = 0; 1085 event[pos++] = HCI_EVENT_AVDTP_META; 1086 event[pos++] = sizeof(event) - 2; 1087 1088 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION; 1089 little_endian_store_16(event, pos, avdtp_cid); 1090 pos += 2; 1091 event[pos++] = local_seid; 1092 event[pos++] = remote_seid; 1093 event[pos++] = reconfigure; 1094 1095 uint8_t object_type_bitmap = media_codec_information[0]; 1096 uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); 1097 uint8_t channels_bitmap = (media_codec_information[2] >> 2) & 0x03; 1098 uint8_t vbr = media_codec_information[3] >> 7; 1099 uint32_t bit_rate = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; 1100 1101 uint8_t object_type = 0; 1102 if (object_type_bitmap & 0x80){ 1103 object_type = AVDTP_AAC_MPEG2_LC; 1104 } else if (object_type_bitmap & 0x40){ 1105 object_type = AVDTP_AAC_MPEG4_LC; 1106 } else if (object_type_bitmap & 0x020){ 1107 object_type = AVDTP_AAC_MPEG4_LTP; 1108 } else if (object_type_bitmap & 0x010){ 1109 object_type = AVDTP_AAC_MPEG4_SCALABLE; 1110 } 1111 1112 uint32_t sampling_frequency = 0; 1113 uint8_t i; 1114 const uint32_t aac_sampling_frequency_table[] = { 1115 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 1116 }; 1117 for (i=0;i<12;i++){ 1118 if (sampling_frequency_bitmap & (1U << i)) { 1119 sampling_frequency = aac_sampling_frequency_table[i]; 1120 } 1121 } 1122 1123 uint8_t num_channels = 0; 1124 if (channels_bitmap & 0x02){ 1125 num_channels = 1; 1126 } else if (channels_bitmap & 0x01){ 1127 num_channels = 2; 1128 } 1129 1130 event[pos++] = media_type; 1131 event[pos++] = object_type; 1132 little_endian_store_24(event, pos, sampling_frequency); 1133 pos += 3; 1134 event[pos++] = num_channels; 1135 little_endian_store_24(event, pos, bit_rate); 1136 pos += 3; 1137 event[pos++] = vbr; 1138 1139 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1140 } 1141 1142 static void 1143 avdtp_signaling_emit_media_codec_atrac_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 1144 uint8_t reconfigure, avdtp_media_type_t media_type, 1145 const uint8_t *media_codec_information) { 1146 1147 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1148 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1149 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1150 1151 uint8_t event[18]; 1152 int pos = 0; 1153 event[pos++] = HCI_EVENT_AVDTP_META; 1154 event[pos++] = sizeof(event) - 2; 1155 1156 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION; 1157 little_endian_store_16(event, pos, avdtp_cid); 1158 pos += 2; 1159 event[pos++] = local_seid; 1160 event[pos++] = remote_seid; 1161 event[pos++] = reconfigure; 1162 1163 avdtp_atrac_version_t version = media_codec_information[0] >> 5; 1164 uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; 1165 uint16_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; 1166 uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; 1167 uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; 1168 uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; 1169 1170 uint8_t num_channels = 0; 1171 avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1172 if (channel_mode_bitmap & 0x04){ 1173 num_channels = 1; 1174 channel_mode = AVDTP_CHANNEL_MODE_MONO; 1175 } else if (channel_mode_bitmap & 0x02){ 1176 num_channels = 2; 1177 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1178 } else if (channel_mode_bitmap & 0x01){ 1179 num_channels = 2; 1180 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1181 } 1182 1183 uint16_t sampling_frequency = 0; 1184 if (sampling_frequency_bitmap & 0x02){ 1185 sampling_frequency = 44100; 1186 } else if (sampling_frequency_bitmap & 0x01){ 1187 sampling_frequency = 48000; 1188 } 1189 1190 // bit 0 = index 0x18, bit 19 = index 0 1191 uint8_t bit_rate_index = 0; 1192 uint8_t i; 1193 for (i=0;i <= 19;i++){ 1194 if (bit_rate_index_bitmap & (1U << i)) { 1195 bit_rate_index = 18 - i; 1196 } 1197 } 1198 1199 event[pos++] = media_type; 1200 event[pos++] = (uint8_t) version; 1201 event[pos++] = (uint8_t) channel_mode; 1202 event[pos++] = num_channels; 1203 little_endian_store_16(event, pos, sampling_frequency); 1204 pos += 2; 1205 event[pos++] = vbr; 1206 event[pos++] = bit_rate_index; 1207 little_endian_store_16(event, pos, maximum_sul); 1208 pos += 2; 1209 1210 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1211 } 1212 1213 static void avdtp_signaling_emit_media_codec_other(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 1214 uint8_t reconfigure, adtvp_media_codec_capabilities_t *media_codec) { 1215 1216 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1217 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1218 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1219 1220 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 1221 int pos = 0; 1222 event[pos++] = HCI_EVENT_AVDTP_META; 1223 event[pos++] = sizeof(event) - 2; 1224 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 1225 little_endian_store_16(event, pos, avdtp_cid); 1226 pos += 2; 1227 event[pos++] = local_seid; 1228 event[pos++] = remote_seid; 1229 event[pos++] = reconfigure; 1230 event[pos++] = media_codec->media_type; 1231 little_endian_store_16(event, pos, media_codec->media_codec_type); 1232 pos += 2; 1233 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 1234 pos += 2; 1235 1236 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 1237 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 1238 1239 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1240 } 1241 1242 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 1243 uint8_t event[8]; 1244 int pos = 0; 1245 event[pos++] = HCI_EVENT_AVDTP_META; 1246 event[pos++] = sizeof(event) - 2; 1247 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 1248 little_endian_store_16(event, pos, avdtp_cid); 1249 pos += 2; 1250 event[pos++] = local_seid; 1251 little_endian_store_16(event, pos, delay); 1252 pos += 2; 1253 avdtp_emit_source(event, sizeof(event)); 1254 } 1255 1256 void avdtp_signaling_emit_media_codec_sbc_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 1257 avdtp_media_type_t media_type, 1258 const uint8_t *media_codec_information) { 1259 avdtp_signaling_emit_media_codec_sbc(stream_endpoint, avdtp_cid, 0, media_type, 1260 media_codec_information); 1261 } 1262 1263 void avdtp_signaling_emit_media_codec_other_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 1264 adtvp_media_codec_capabilities_t * media_codec) { 1265 avdtp_signaling_emit_media_codec_other(stream_endpoint, avdtp_cid, 0, media_codec); 1266 } 1267 1268 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 1269 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 1270 1271 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 1272 switch (configuration->media_codec.media_codec_type){ 1273 case AVDTP_CODEC_SBC: 1274 avdtp_signaling_emit_media_codec_sbc_configuration( 1275 stream_endpoint, avdtp_cid, 1276 configuration->media_codec.media_type, 1277 configuration->media_codec.media_codec_information); 1278 break; 1279 case AVDTP_CODEC_MPEG_1_2_AUDIO: 1280 avdtp_signaling_emit_media_codec_mpeg_audio_configuration( 1281 stream_endpoint, avdtp_cid, 0, 1282 configuration->media_codec.media_type, 1283 configuration->media_codec.media_codec_information); 1284 break; 1285 case AVDTP_CODEC_MPEG_2_4_AAC: 1286 avdtp_signaling_emit_media_codec_mpeg_aac_configuration( 1287 stream_endpoint, avdtp_cid, 0, 1288 configuration->media_codec.media_type, 1289 configuration->media_codec.media_codec_information); 1290 break; 1291 case AVDTP_CODEC_ATRAC_FAMILY: 1292 avdtp_signaling_emit_media_codec_atrac_configuration( 1293 stream_endpoint, avdtp_cid, 0, 1294 configuration->media_codec.media_type, 1295 configuration->media_codec.media_codec_information); 1296 break; 1297 default: 1298 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, avdtp_cid, 1299 &configuration->media_codec); 1300 break; 1301 } 1302 } 1303 } 1304 1305 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 1306 uint8_t event[14]; 1307 int pos = 0; 1308 event[pos++] = HCI_EVENT_AVDTP_META; 1309 event[pos++] = sizeof(event) - 2; 1310 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 1311 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1312 pos += 2; 1313 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 1314 pos += 6; 1315 event[pos++] = avdtp_local_seid(stream_endpoint); 1316 event[pos++] = avdtp_remote_seid(stream_endpoint); 1317 event[pos++] = status; 1318 1319 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1320 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1321 } 1322 1323 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 1324 uint8_t event[6]; 1325 int pos = 0; 1326 event[pos++] = HCI_EVENT_AVDTP_META; 1327 event[pos++] = sizeof(event) - 2; 1328 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 1329 little_endian_store_16(event, pos, avdtp_cid); 1330 pos += 2; 1331 event[pos++] = local_seid; 1332 1333 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1334 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1335 } 1336 1337 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 1338 uint8_t event[8]; 1339 int pos = 0; 1340 event[pos++] = HCI_EVENT_AVDTP_META; 1341 event[pos++] = sizeof(event) - 2; 1342 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 1343 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1344 pos += 2; 1345 event[pos++] = avdtp_local_seid(stream_endpoint); 1346 little_endian_store_16(event, pos, sequence_number); 1347 pos += 2; 1348 1349 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1350 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1351 } 1352 1353 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t *connection) { 1354 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1355 connection->wait_to_send_acceptor = true; 1356 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1357 return ERROR_CODE_SUCCESS; 1358 } 1359 1360 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t *connection) { 1361 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1362 connection->wait_to_send_initiator = true; 1363 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1364 return ERROR_CODE_SUCCESS; 1365 } 1366 1367 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1368 if (!stream_endpoint) return 0; 1369 return stream_endpoint->sep.seid; 1370 1371 } 1372 1373 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1374 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1375 return stream_endpoint->remote_sep.seid; 1376 } 1377 1378 // helper for A2DP 1379 1380 void a2dp_replace_subevent_id_and_emit_cmd(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t subevent_id){ 1381 UNUSED(size); 1382 btstack_assert(callback != NULL); 1383 // cache orig event and subevent id 1384 uint8_t orig_event_id = packet[0]; 1385 uint8_t orig_subevent_id = packet[2]; 1386 // execute callback 1387 packet[0] = HCI_EVENT_A2DP_META; 1388 packet[2] = subevent_id; 1389 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1390 // restore id 1391 packet[0] = orig_event_id; 1392 packet[2] = orig_subevent_id; 1393 } 1394 1395 void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t subevent_id){ 1396 uint8_t event[6]; 1397 int pos = 0; 1398 event[pos++] = HCI_EVENT_A2DP_META; 1399 event[pos++] = sizeof(event) - 2; 1400 event[pos++] = subevent_id; 1401 little_endian_store_16(event, pos, cid); 1402 pos += 2; 1403 event[pos++] = local_seid; 1404 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1405 } 1406