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 "classic/avdtp.h" 44 #include "classic/avdtp_util.h" 45 46 #include "btstack_debug.h" 47 #include "btstack_util.h" 48 #include "l2cap.h" 49 50 #define MAX_MEDIA_CODEC_INFORMATION_LENGTH 30 51 52 53 /* 54 55 List of AVDTP_SUBEVENTs sorted by packet handler 56 57 58 Sink + Source: 59 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED 60 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED 61 - AVDTP_SUBEVENT_SIGNALING_SEP_FOUND 62 - AVDTP_SUBEVENT_SIGNALING_ACCEPT 63 - AVDTP_SUBEVENT_SIGNALING_REJECT 64 - AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT 65 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY 66 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY 67 - AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY 68 - AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY 69 - AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY 70 - AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY 71 - AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY 72 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY 73 - AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY 74 - AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE 75 - AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE 76 77 Source: 78 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT 79 80 Sink or Source based on SEP Type: 81 - AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED 82 - AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED 83 - AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW 84 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION 85 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION 86 87 */ 88 89 static const char * avdtp_si_name[] = { 90 "ERROR", 91 "AVDTP_SI_DISCOVER", 92 "AVDTP_SI_GET_CAPABILITIES", 93 "AVDTP_SI_SET_CONFIGURATION", 94 "AVDTP_SI_GET_CONFIGURATION", 95 "AVDTP_SI_RECONFIGURE", 96 "AVDTP_SI_OPEN", 97 "AVDTP_SI_START", 98 "AVDTP_SI_CLOSE", 99 "AVDTP_SI_SUSPEND", 100 "AVDTP_SI_ABORT", 101 "AVDTP_SI_SECURITY_CONTROL", 102 "AVDTP_SI_GET_ALL_CAPABILITIES", 103 "AVDTP_SI_DELAY_REPORT" 104 }; 105 const char * avdtp_si2str(uint16_t index){ 106 if ((index <= 0) || (index >= sizeof(avdtp_si_name)/sizeof(avdtp_si_name[0]) )) return avdtp_si_name[0]; 107 return avdtp_si_name[index]; 108 } 109 110 void avdtp_reset_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 111 stream_endpoint->media_con_handle = 0; 112 stream_endpoint->l2cap_media_cid = 0; 113 stream_endpoint->l2cap_reporting_cid = 0; 114 stream_endpoint->l2cap_recovery_cid = 0; 115 116 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 117 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 118 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 119 120 stream_endpoint->connection = NULL; 121 122 stream_endpoint->sep.in_use = 0; 123 memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); 124 125 stream_endpoint->remote_capabilities_bitmap = 0; 126 memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); 127 stream_endpoint->remote_configuration_bitmap = 0; 128 memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); 129 130 // temporary SBC config used by A2DP Source 131 memset(stream_endpoint->media_codec_info, 0, 8); 132 133 stream_endpoint->media_disconnect = 0; 134 stream_endpoint->media_connect = 0; 135 stream_endpoint->start_stream = 0; 136 stream_endpoint->close_stream = 0; 137 stream_endpoint->request_can_send_now = false; 138 stream_endpoint->abort_stream = 0; 139 stream_endpoint->suspend_stream = 0; 140 stream_endpoint->sequence_number = 0; 141 } 142 143 int get_bit16(uint16_t bitmap, int position){ 144 return (bitmap >> position) & 1; 145 } 146 147 uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 148 if (value){ 149 bitmap |= 1 << position; 150 } else { 151 bitmap &= ~ (1 << position); 152 } 153 return bitmap; 154 } 155 156 avdtp_message_type_t avdtp_get_signaling_packet_type(uint8_t * packet){ 157 return (avdtp_message_type_t) (packet[0] & 0x03); 158 } 159 160 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 161 int pos = 0; 162 if (size < 2) return pos; 163 signaling_header->transaction_label = packet[pos] >> 4; 164 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 165 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 166 pos++; 167 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 168 switch (signaling_header->packet_type){ 169 case AVDTP_SINGLE_PACKET: 170 signaling_header->num_packets = 0; 171 signaling_header->offset = 0; 172 signaling_header->size = 0; 173 break; 174 case AVDTP_END_PACKET: 175 signaling_header->num_packets = 0; 176 break; 177 case AVDTP_START_PACKET: 178 signaling_header->num_packets = packet[pos++]; 179 signaling_header->size = 0; 180 signaling_header->offset = 0; 181 break; 182 case AVDTP_CONTINUE_PACKET: 183 if (signaling_header->num_packets <= 0) { 184 log_info(" ERROR: wrong num fragmented packets\n"); 185 break; 186 } 187 signaling_header->num_packets--; 188 break; 189 default: 190 btstack_assert(false); 191 break; 192 } 193 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 194 return pos; 195 } 196 197 static bool avdtp_is_basic_capability(int service_category){ 198 return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); 199 } 200 201 int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { 202 UNUSED(size); 203 204 int i; 205 // pos = 0 reserved for length 206 int pos = 1; 207 switch(category){ 208 case AVDTP_MEDIA_TRANSPORT: 209 case AVDTP_REPORTING: 210 case AVDTP_DELAY_REPORTING: 211 break; 212 case AVDTP_RECOVERY: 213 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 214 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 215 buffer[pos++] = caps.recovery.maximum_number_media_packets; 216 break; 217 case AVDTP_CONTENT_PROTECTION: 218 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 219 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 220 pos += 2; 221 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 222 caps.content_protection.cp_type_value_len); 223 pos += caps.content_protection.cp_type_value_len; 224 break; 225 case AVDTP_HEADER_COMPRESSION: 226 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 227 break; 228 case AVDTP_MULTIPLEXING: 229 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 230 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 231 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 232 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 233 // media, reporting. recovery 234 } 235 break; 236 case AVDTP_MEDIA_CODEC: 237 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 238 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 239 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 240 buffer[pos++] = caps.media_codec.media_codec_information[i]; 241 } 242 break; 243 default: 244 break; 245 } 246 buffer[0] = pos - 1; // length 247 return pos; 248 } 249 250 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){ 251 connection->error_code = 0; 252 253 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 254 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 255 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 256 connection->reject_service_category = category; 257 connection->error_code = AVDTP_ERROR_CODE_BAD_SERV_CATEGORY; 258 return 1; 259 } 260 261 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 262 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 263 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 264 connection->reject_service_category = category; 265 connection->error_code = AVDTP_ERROR_CODE_INVALID_CAPABILITIES; 266 return 1; 267 } 268 } 269 270 switch(category){ 271 case AVDTP_MEDIA_TRANSPORT: 272 if (cap_len != 0){ 273 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 274 connection->reject_service_category = category; 275 connection->error_code = AVDTP_ERROR_CODE_BAD_MEDIA_TRANSPORT_FORMAT; 276 return 1; 277 } 278 break; 279 case AVDTP_REPORTING: 280 case AVDTP_DELAY_REPORTING: 281 if (cap_len != 0){ 282 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 283 connection->reject_service_category = category; 284 connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; 285 return 1; 286 } 287 break; 288 case AVDTP_RECOVERY: 289 if (cap_len != 3){ 290 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 291 connection->reject_service_category = category; 292 connection->error_code = AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT; 293 return 1; 294 } 295 break; 296 case AVDTP_CONTENT_PROTECTION: 297 if (cap_len < 2){ 298 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 299 connection->reject_service_category = category; 300 connection->error_code = AVDTP_ERROR_CODE_BAD_CP_FORMAT; 301 return 1; 302 } 303 break; 304 case AVDTP_HEADER_COMPRESSION: 305 // TODO: find error code for bad header compression 306 if (cap_len != 1){ 307 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 308 connection->reject_service_category = category; 309 connection->error_code = AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT; 310 return 1; 311 } 312 break; 313 case AVDTP_MULTIPLEXING: 314 break; 315 case AVDTP_MEDIA_CODEC: 316 break; 317 default: 318 break; 319 } 320 return 0; 321 } 322 323 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){ 324 325 int i; 326 327 uint16_t registered_service_categories = 0; 328 uint16_t to_process = size; 329 330 while (to_process >= 2){ 331 332 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 333 uint8_t cap_len = packet[1]; 334 packet += 2; 335 to_process -= 2; 336 337 if (cap_len > to_process){ 338 connection->reject_service_category = category; 339 connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; 340 return 0; 341 } 342 343 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 344 345 int category_valid = 1; 346 347 uint8_t * data = packet; 348 uint16_t pos = 0; 349 350 switch(category){ 351 case AVDTP_RECOVERY: 352 caps->recovery.recovery_type = data[pos++]; 353 caps->recovery.maximum_recovery_window_size = data[pos++]; 354 caps->recovery.maximum_number_media_packets = data[pos++]; 355 break; 356 case AVDTP_CONTENT_PROTECTION: 357 caps->content_protection.cp_type = big_endian_read_16(data, 0); 358 caps->content_protection.cp_type_value_len = cap_len - 2; 359 // connection->reject_service_category = category; 360 // connection->error_code = UNSUPPORTED_CONFIGURATION; 361 // support for content protection goes here 362 break; 363 case AVDTP_HEADER_COMPRESSION: 364 caps->header_compression.back_ch = (data[0] >> 7) & 1; 365 caps->header_compression.media = (data[0] >> 6) & 1; 366 caps->header_compression.recovery = (data[0] >> 5) & 1; 367 break; 368 case AVDTP_MULTIPLEXING: 369 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 370 // read [tsid, tcid] for media, reporting. recovery respectively 371 caps->multiplexing_mode.transport_identifiers_num = 3; 372 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 373 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 374 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 375 } 376 break; 377 case AVDTP_MEDIA_CODEC: 378 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 379 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 380 caps->media_codec.media_codec_information_len = cap_len - 2; 381 caps->media_codec.media_codec_information = &data[pos++]; 382 break; 383 case AVDTP_MEDIA_TRANSPORT: 384 case AVDTP_REPORTING: 385 case AVDTP_DELAY_REPORTING: 386 break; 387 default: 388 category_valid = 0; 389 break; 390 } 391 392 if (category_valid) { 393 registered_service_categories = store_bit16(registered_service_categories, category, 1); 394 } 395 396 packet += cap_len; 397 to_process -= cap_len; 398 } 399 400 return registered_service_categories; 401 } 402 403 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){ 404 if (signaling_packet->offset) return; 405 bool basic_capabilities_only = false; 406 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 407 int i; 408 409 signaling_packet->size = 0; 410 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 411 412 switch (identifier) { 413 case AVDTP_SI_GET_CAPABILITIES: 414 basic_capabilities_only = true; 415 break; 416 case AVDTP_SI_GET_ALL_CAPABILITIES: 417 break; 418 case AVDTP_SI_SET_CONFIGURATION: 419 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 420 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 421 signaling_packet->message_type = AVDTP_CMD_MSG; 422 break; 423 case AVDTP_SI_RECONFIGURE: 424 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 425 signaling_packet->message_type = AVDTP_CMD_MSG; 426 break; 427 default: 428 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 429 break; 430 } 431 432 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 433 int registered_category = get_bit16(service_categories, i); 434 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 435 // TODO: introduce bitmap of mandatory categories 436 if (i == AVDTP_MEDIA_TRANSPORT){ 437 registered_category = true; 438 } 439 } 440 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 441 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 442 registered_category = false; 443 } 444 445 if (registered_category){ 446 // service category 447 signaling_packet->command[signaling_packet->size++] = i; 448 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 449 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 450 } 451 } 452 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 453 signaling_packet->transaction_label = transaction_label; 454 } 455 456 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 457 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 458 int data_len = 0; 459 460 uint16_t offset = signaling_packet->offset; 461 uint16_t pos = 1; 462 463 if (offset == 0){ 464 if (signaling_packet->size <= (mtu - 2)){ 465 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 466 out_buffer[pos++] = signaling_packet->signal_identifier; 467 data_len = signaling_packet->size; 468 } else { 469 signaling_packet->packet_type = AVDTP_START_PACKET; 470 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 471 out_buffer[pos++] = signaling_packet->signal_identifier; 472 data_len = mtu - 3; 473 signaling_packet->offset = data_len; 474 } 475 } else { 476 int remaining_bytes = signaling_packet->size - offset; 477 if (remaining_bytes <= (mtu - 1)){ 478 signaling_packet->packet_type = AVDTP_END_PACKET; 479 data_len = remaining_bytes; 480 signaling_packet->offset = 0; 481 } else{ 482 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 483 data_len = mtu - 1; 484 signaling_packet->offset += data_len; 485 } 486 } 487 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 488 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 489 data_len); 490 pos += data_len; 491 return pos; 492 } 493 494 495 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { 496 uint8_t event[14]; 497 int pos = 0; 498 event[pos++] = HCI_EVENT_AVDTP_META; 499 event[pos++] = sizeof(event) - 2; 500 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 501 little_endian_store_16(event, pos, avdtp_cid); 502 pos += 2; 503 reverse_bd_addr(addr,&event[pos]); 504 pos += 6; 505 little_endian_store_16(event, pos, con_handle); 506 pos += 2; 507 event[pos++] = status; 508 avdtp_emit_sink_and_source(event, pos); 509 } 510 511 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 512 uint8_t event[5]; 513 int pos = 0; 514 event[pos++] = HCI_EVENT_AVDTP_META; 515 event[pos++] = sizeof(event) - 2; 516 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 517 little_endian_store_16(event, pos, avdtp_cid); 518 pos += 2; 519 avdtp_emit_sink_and_source(event, pos); 520 } 521 522 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 523 uint8_t event[9]; 524 int pos = 0; 525 event[pos++] = HCI_EVENT_AVDTP_META; 526 event[pos++] = sizeof(event) - 2; 527 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 528 little_endian_store_16(event, pos, avdtp_cid); 529 pos += 2; 530 event[pos++] = sep.seid; 531 event[pos++] = sep.in_use; 532 event[pos++] = sep.media_type; 533 event[pos++] = sep.type; 534 avdtp_emit_sink_and_source(event, pos); 535 } 536 537 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 538 uint8_t event[5]; 539 int pos = 0; 540 event[pos++] = HCI_EVENT_AVDTP_META; 541 event[pos++] = sizeof(event) - 2; 542 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 543 little_endian_store_16(event, pos, avdtp_cid); 544 pos += 2; 545 avdtp_emit_sink_and_source(event, pos); 546 } 547 548 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 549 uint8_t event[8]; 550 int pos = 0; 551 event[pos++] = HCI_EVENT_AVDTP_META; 552 event[pos++] = sizeof(event) - 2; 553 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 554 little_endian_store_16(event, pos, avdtp_cid); 555 pos += 2; 556 event[pos++] = local_seid; 557 event[pos++] = is_initiator ? 1 : 0; 558 event[pos++] = identifier; 559 avdtp_emit_sink_and_source(event, pos); 560 } 561 562 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){ 563 uint8_t event[8]; 564 int pos = 0; 565 event[pos++] = HCI_EVENT_AVDTP_META; 566 event[pos++] = sizeof(event) - 2; 567 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 568 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 569 pos += 2; 570 event[pos++] = local_seid; 571 event[pos++] = is_initiator ? 1 : 0; 572 event[pos++] = identifier; 573 574 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 575 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 576 } 577 578 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 579 uint8_t event[8]; 580 int pos = 0; 581 event[pos++] = HCI_EVENT_AVDTP_META; 582 event[pos++] = sizeof(event) - 2; 583 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 584 little_endian_store_16(event, pos, avdtp_cid); 585 pos += 2; 586 event[pos++] = local_seid; 587 event[pos++] = is_initiator ? 1 : 0; 588 event[pos++] = identifier; 589 avdtp_emit_sink_and_source(event, pos); 590 } 591 592 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 593 uint8_t event[8]; 594 int pos = 0; 595 event[pos++] = HCI_EVENT_AVDTP_META; 596 event[pos++] = sizeof(event) - 2; 597 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 598 little_endian_store_16(event, pos, avdtp_cid); 599 pos += 2; 600 event[pos++] = local_seid; 601 event[pos++] = is_initiator ? 1 : 0; 602 event[pos++] = identifier; 603 avdtp_emit_sink_and_source(event, pos); 604 } 605 606 static inline void 607 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t remote_seid) { 608 uint8_t event[6]; 609 int pos = 0; 610 event[pos++] = HCI_EVENT_AVDTP_META; 611 event[pos++] = sizeof(event) - 2; 612 event[pos++] = capability_subevent_id; 613 little_endian_store_16(event, pos, avdtp_cid); 614 pos += 2; 615 event[pos++] = remote_seid; 616 avdtp_emit_sink_and_source(event, pos); 617 } 618 619 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 620 const uint8_t * media_codec_information = media_codec.media_codec_information; 621 uint8_t event[14]; 622 int pos = 0; 623 event[pos++] = HCI_EVENT_AVDTP_META; 624 event[pos++] = sizeof(event) - 2; 625 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 626 little_endian_store_16(event, pos, avdtp_cid); 627 pos += 2; 628 event[pos++] = remote_seid; 629 event[pos++] = media_codec.media_type; 630 event[pos++] = media_codec_information[0] >> 4; 631 event[pos++] = media_codec_information[0] & 0x0F; 632 event[pos++] = media_codec_information[1] >> 4; 633 event[pos++] = (media_codec_information[1] & 0x0F) >> 2; 634 event[pos++] = media_codec_information[1] & 0x03; 635 event[pos++] = media_codec_information[2]; 636 event[pos++] = media_codec_information[3]; 637 avdtp_emit_sink_and_source(event, pos); 638 } 639 640 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) { 641 const uint8_t * media_codec_information = media_codec.media_codec_information; 642 uint8_t event[15]; 643 int pos = 0; 644 event[pos++] = HCI_EVENT_AVDTP_META; 645 event[pos++] = sizeof(event) - 2; 646 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY; 647 little_endian_store_16(event, pos, avdtp_cid); 648 pos += 2; 649 event[pos++] = remote_seid; 650 event[pos++] = media_codec.media_type; 651 652 uint8_t layer_bitmap = media_codec_information[0] >> 5; 653 uint8_t crc = (media_codec_information[0] >> 4) & 0x01; 654 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x07; 655 uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; 656 uint8_t sampling_frequency_bitmap = media_codec_information[1] & 0x3F; 657 uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; 658 uint16_t bit_rate_index_bitmap = ((media_codec_information[3] & 0x3f) << 8) | media_codec.media_codec_information[4]; 659 660 event[pos++] = layer_bitmap; 661 event[pos++] = crc; 662 event[pos++] = channel_mode_bitmap; 663 event[pos++] = mpf; 664 event[pos++] = sampling_frequency_bitmap; 665 event[pos++] = vbr; 666 little_endian_store_16(event, pos, bit_rate_index_bitmap); // bit rate index 667 pos += 2; 668 avdtp_emit_sink_and_source(event, pos); 669 } 670 671 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) { 672 const uint8_t * media_codec_information = media_codec.media_codec_information; 673 uint8_t event[15]; 674 int pos = 0; 675 event[pos++] = HCI_EVENT_AVDTP_META; 676 event[pos++] = sizeof(event) - 2; 677 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY; 678 little_endian_store_16(event, pos, avdtp_cid); 679 pos += 2; 680 event[pos++] = remote_seid; 681 event[pos++] = media_codec.media_type; 682 683 uint8_t object_type_bitmap = media_codec_information[0]; 684 uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); 685 uint8_t channels_bitmap = (media_codec_information[2] >> 2) & 0x03; 686 uint32_t bit_rate_bitmap = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; 687 uint8_t vbr = media_codec_information[3] >> 7; 688 689 event[pos++] = object_type_bitmap; 690 little_endian_store_16(event, pos, sampling_frequency_bitmap); 691 pos += 2; 692 event[pos++] = channels_bitmap; 693 little_endian_store_24(event, pos, bit_rate_bitmap); 694 pos += 3; 695 event[pos++] = vbr; 696 avdtp_emit_sink_and_source(event, pos); 697 } 698 699 static void avdtp_signaling_emit_media_codec_atrac_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 700 const uint8_t * media_codec_information = media_codec.media_codec_information; 701 uint8_t event[16]; 702 int pos = 0; 703 event[pos++] = HCI_EVENT_AVDTP_META; 704 pos++; // set later 705 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY; 706 little_endian_store_16(event, pos, avdtp_cid); 707 pos += 2; 708 event[pos++] = remote_seid; 709 event[pos++] = media_codec.media_type; 710 711 uint8_t version = media_codec_information[0] >> 5; 712 uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; 713 uint16_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; 714 uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; 715 uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; 716 uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; 717 718 event[pos++] = version; 719 event[pos++] = channel_mode_bitmap; 720 event[pos++] = sampling_frequency_bitmap; 721 event[pos++] = vbr; 722 little_endian_store_24(event, pos, bit_rate_index_bitmap); 723 pos += 3; 724 little_endian_store_16(event, pos, maximum_sul); 725 pos += 2; 726 event[1] = pos - 2; 727 avdtp_emit_sink_and_source(event, pos); 728 } 729 730 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 731 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 11]; 732 int pos = 0; 733 event[pos++] = HCI_EVENT_AVDTP_META; 734 pos++; // set later 735 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 736 little_endian_store_16(event, pos, avdtp_cid); 737 pos += 2; 738 event[pos++] = remote_seid; 739 event[pos++] = media_codec.media_type; 740 little_endian_store_16(event, pos, media_codec.media_codec_type); 741 pos += 2; 742 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 743 pos += 2; 744 uint32_t media_codec_info_len = btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH); 745 (void)memcpy(event + pos, media_codec.media_codec_information, media_codec_info_len); 746 pos += media_codec_info_len; 747 event[1] = pos - 2; 748 avdtp_emit_sink_and_source(event, pos); 749 } 750 751 static void 752 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 753 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, 754 remote_seid); 755 } 756 757 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 758 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, remote_seid); 759 } 760 761 static void 762 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 763 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, 764 remote_seid); 765 } 766 767 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_recovery_capabilities_t *recovery) { 768 uint8_t event[9]; 769 int pos = 0; 770 event[pos++] = HCI_EVENT_AVDTP_META; 771 event[pos++] = sizeof(event) - 2; 772 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 773 little_endian_store_16(event, pos, avdtp_cid); 774 pos += 2; 775 event[pos++] = remote_seid; 776 event[pos++] = recovery->recovery_type; 777 event[pos++] = recovery->maximum_recovery_window_size; 778 event[pos++] = recovery->maximum_number_media_packets; 779 avdtp_emit_sink_and_source(event, pos); 780 } 781 782 #define MAX_CONTENT_PROTECTION_VALUE_LEN 32 783 static void 784 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_content_protection_t *content_protection) { 785 uint8_t event[10 + MAX_CONTENT_PROTECTION_VALUE_LEN]; 786 int pos = 0; 787 event[pos++] = HCI_EVENT_AVDTP_META; 788 pos++; // set later 789 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 790 little_endian_store_16(event, pos, avdtp_cid); 791 pos += 2; 792 event[pos++] = remote_seid; 793 794 little_endian_store_16(event, pos, content_protection->cp_type); 795 pos += 2; 796 797 // drop cp protection value if longer than expected 798 if (content_protection->cp_type_value_len <= MAX_CONTENT_PROTECTION_VALUE_LEN){ 799 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 800 pos += 2; 801 (void)memcpy(event + pos, content_protection->cp_type_value, content_protection->cp_type_value_len); 802 pos += content_protection->cp_type_value_len; 803 } else { 804 little_endian_store_16(event, pos, 0); 805 pos += 2; 806 } 807 event[1] = pos - 2; 808 avdtp_emit_sink_and_source(event, pos); 809 } 810 811 812 static void 813 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_header_compression_capabilities_t *header_compression) { 814 uint8_t event[9]; 815 int pos = 0; 816 event[pos++] = HCI_EVENT_AVDTP_META; 817 event[pos++] = sizeof(event) - 2; 818 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 819 little_endian_store_16(event, pos, avdtp_cid); 820 pos += 2; 821 event[pos++] = remote_seid; 822 event[pos++] = header_compression->back_ch; 823 event[pos++] = header_compression->media; 824 event[pos++] = header_compression->recovery; 825 avdtp_emit_sink_and_source(event, pos); 826 } 827 828 static void 829 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 830 uint8_t event[14]; 831 int pos = 0; 832 event[pos++] = HCI_EVENT_AVDTP_META; 833 event[pos++] = sizeof(event) - 2; 834 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 835 little_endian_store_16(event, pos, avdtp_cid); 836 pos += 2; 837 event[pos++] = remote_seid; 838 839 event[pos++] = multiplexing_mode->fragmentation; 840 event[pos++] = multiplexing_mode->transport_identifiers_num; 841 842 int i; 843 for (i = 0; i < 3; i++){ 844 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 845 } 846 for (i = 0; i < 3; i++){ 847 event[pos++] = multiplexing_mode->tcid[i]; 848 } 849 avdtp_emit_sink_and_source(event, pos); 850 } 851 852 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t remote_seid) { 853 uint8_t event[6]; 854 int pos = 0; 855 event[pos++] = HCI_EVENT_AVDTP_META; 856 event[pos++] = sizeof(event) - 2; 857 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 858 little_endian_store_16(event, pos, avdtp_cid); 859 pos += 2; 860 event[pos++] = remote_seid; 861 avdtp_emit_sink_and_source(event, pos); 862 } 863 864 static void avdtp_signaling_emit_media_codec_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 865 switch (media_codec.media_codec_type){ 866 case AVDTP_CODEC_SBC: 867 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, remote_seid, media_codec); 868 break; 869 case AVDTP_CODEC_MPEG_1_2_AUDIO: 870 avdtp_signaling_emit_media_codec_mpeg_audio_capability(avdtp_cid, remote_seid, media_codec); 871 break; 872 case AVDTP_CODEC_MPEG_2_4_AAC: 873 avdtp_signaling_emit_media_codec_mpeg_aac_capability(avdtp_cid, remote_seid, media_codec); 874 break; 875 case AVDTP_CODEC_ATRAC_FAMILY: 876 avdtp_signaling_emit_media_codec_atrac_capability(avdtp_cid, remote_seid, media_codec); 877 break; 878 default: 879 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, remote_seid, media_codec); 880 break; 881 } 882 } 883 884 // emit events for all capabilities incl. final done event 885 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 886 uint16_t registered_service_categories) { 887 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 888 avdtp_signaling_emit_media_codec_capability(avdtp_cid, remote_seid, capabilities->media_codec); 889 } 890 891 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 892 avdtp_signaling_emit_media_transport_capability(avdtp_cid, remote_seid); 893 } 894 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 895 avdtp_signaling_emit_reporting_capability(avdtp_cid, remote_seid); 896 } 897 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 898 avdtp_signaling_emit_recovery_capability(avdtp_cid, remote_seid, &capabilities->recovery); 899 } 900 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 901 avdtp_signaling_emit_content_protection_capability(avdtp_cid, remote_seid, 902 &capabilities->content_protection); 903 } 904 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 905 avdtp_signaling_emit_header_compression_capability(avdtp_cid, remote_seid, 906 &capabilities->header_compression); 907 } 908 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 909 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, remote_seid, 910 &capabilities->multiplexing_mode); 911 } 912 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 913 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, remote_seid); 914 } 915 avdtp_signaling_emit_capability_done(avdtp_cid, remote_seid); 916 } 917 918 #define MEDIA_CONFIG_SBC_EVENT_LEN 18 919 920 static uint16_t 921 avdtp_signaling_setup_media_codec_sbc_config_event(uint8_t *event, uint16_t size, 922 avdtp_stream_endpoint_t *stream_endpoint, 923 uint16_t avdtp_cid, uint8_t reconfigure, 924 const uint8_t *media_codec_information) { 925 926 btstack_assert(size >= MEDIA_CONFIG_SBC_EVENT_LEN); 927 928 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 929 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 930 931 int pos = 0; 932 event[pos++] = HCI_EVENT_AVDTP_META; 933 event[pos++] = MEDIA_CONFIG_SBC_EVENT_LEN - 2; 934 935 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 936 little_endian_store_16(event, pos, avdtp_cid); 937 pos += 2; 938 event[pos++] = local_seid; 939 event[pos++] = remote_seid; 940 event[pos++] = reconfigure; 941 event[pos++] = AVDTP_CODEC_SBC; 942 943 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 944 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 945 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 946 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 947 948 uint8_t num_channels = 0; 949 avdtp_channel_mode_t channel_mode; 950 951 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 952 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 953 num_channels = 2; 954 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 955 channel_mode = AVDTP_CHANNEL_MODE_STEREO; 956 num_channels = 2; 957 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 958 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 959 num_channels = 2; 960 } else { 961 channel_mode = AVDTP_CHANNEL_MODE_MONO; 962 num_channels = 1; 963 } 964 965 uint16_t sampling_frequency = 0; 966 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 967 sampling_frequency = 48000; 968 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 969 sampling_frequency = 44100; 970 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 971 sampling_frequency = 32000; 972 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 973 sampling_frequency = 16000; 974 } 975 976 uint8_t subbands = 0; 977 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 978 subbands = 8; 979 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 980 subbands = 4; 981 } 982 983 uint8_t block_length = 0; 984 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 985 block_length = 16; 986 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 987 block_length = 12; 988 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 989 block_length = 8; 990 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 991 block_length = 4; 992 } 993 994 little_endian_store_16(event, pos, sampling_frequency); 995 pos += 2; 996 997 event[pos++] = (uint8_t) channel_mode; 998 event[pos++] = num_channels; 999 event[pos++] = block_length; 1000 event[pos++] = subbands; 1001 event[pos++] = media_codec_information[1] & 0x03; 1002 event[pos++] = media_codec_information[2]; 1003 event[pos++] = media_codec_information[3]; 1004 1005 btstack_assert(pos == MEDIA_CONFIG_SBC_EVENT_LEN); 1006 1007 return pos; 1008 } 1009 1010 #define MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN 18 1011 1012 static uint16_t 1013 avdtp_signaling_setup_media_codec_mpeg_audio_config_event(uint8_t *event, uint16_t size, 1014 avdtp_stream_endpoint_t *stream_endpoint, 1015 uint16_t avdtp_cid, uint8_t reconfigure, 1016 const uint8_t *media_codec_information) { 1017 1018 btstack_assert(size >= MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); 1019 1020 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1021 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1022 1023 uint16_t pos = 0; 1024 event[pos++] = HCI_EVENT_AVDTP_META; 1025 event[pos++] = MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN - 2; 1026 1027 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION; 1028 little_endian_store_16(event, pos, avdtp_cid); 1029 pos += 2; 1030 event[pos++] = local_seid; 1031 event[pos++] = remote_seid; 1032 event[pos++] = reconfigure; 1033 event[pos++] = AVDTP_CODEC_MPEG_1_2_AUDIO; 1034 1035 uint8_t layer_bitmap = media_codec_information[0] >> 5; 1036 uint8_t crc = (media_codec_information[0] >> 4) & 0x01; 1037 uint8_t channel_mode_bitmap = (media_codec_information[0] & 0x07); 1038 uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; 1039 uint8_t sampling_frequency_bitmap = (media_codec_information[1] & 0x3F); 1040 uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; 1041 uint16_t bit_rate_index_bitmap = ((media_codec_information[2] & 0x3f) << 8) | media_codec_information[3]; 1042 1043 uint8_t layer = 0; 1044 if (layer_bitmap & 0x04){ 1045 layer = AVDTP_MPEG_LAYER_1; 1046 } else if (layer_bitmap & 0x02){ 1047 layer = AVDTP_MPEG_LAYER_2; 1048 } else if (layer_bitmap & 0x01){ 1049 layer = AVDTP_MPEG_LAYER_3; 1050 } 1051 1052 uint8_t num_channels = 0; 1053 avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1054 if (channel_mode_bitmap & 0x08){ 1055 num_channels = 1; 1056 channel_mode = AVDTP_CHANNEL_MODE_MONO; 1057 } else if (channel_mode_bitmap & 0x04){ 1058 num_channels = 2; 1059 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1060 } else if (channel_mode_bitmap & 0x02){ 1061 num_channels = 2; 1062 channel_mode = AVDTP_CHANNEL_MODE_STEREO; 1063 } else if (channel_mode_bitmap & 0x02){ 1064 num_channels = 2; 1065 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1066 } 1067 1068 uint16_t sampling_frequency = 0; 1069 if (sampling_frequency_bitmap & 0x01) { 1070 sampling_frequency = 48000; 1071 } else if (sampling_frequency_bitmap & 0x02) { 1072 sampling_frequency = 44100; 1073 } else if (sampling_frequency_bitmap & 0x04) { 1074 sampling_frequency = 32000; 1075 } else if (sampling_frequency_bitmap & 0x08) { 1076 sampling_frequency = 24000; 1077 } else if (sampling_frequency_bitmap & 0x10) { 1078 sampling_frequency = 22050; 1079 } else if (sampling_frequency_bitmap & 0x20) { 1080 sampling_frequency = 16000; 1081 } 1082 1083 uint8_t bitrate_index = 0; 1084 uint8_t i; 1085 for (i=0;i<14;i++){ 1086 if (bit_rate_index_bitmap & (1U << i)) { 1087 bitrate_index = i; 1088 } 1089 } 1090 1091 event[pos++] = (uint8_t) layer; 1092 event[pos++] = crc; 1093 event[pos++] = (uint8_t) channel_mode; 1094 event[pos++] = num_channels; 1095 event[pos++] = mpf; 1096 little_endian_store_16(event, pos, sampling_frequency); 1097 pos += 2; 1098 event[pos++] = vbr; 1099 event[pos++] = bitrate_index; 1100 1101 btstack_assert(pos == MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); 1102 1103 return pos; 1104 } 1105 1106 #define MEDIA_CONFIG_MPEG_AAC_EVENT_LEN 18 1107 1108 static uint16_t 1109 avdtp_signaling_setup_media_codec_mpec_aac_config_event(uint8_t *event, uint16_t size, 1110 avdtp_stream_endpoint_t *stream_endpoint, 1111 uint16_t avdtp_cid, uint8_t reconfigure, 1112 const uint8_t *media_codec_information) { 1113 1114 btstack_assert(size >= MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); 1115 1116 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1117 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1118 1119 uint16_t pos = 0; 1120 event[pos++] = HCI_EVENT_AVDTP_META; 1121 event[pos++] = MEDIA_CONFIG_MPEG_AAC_EVENT_LEN - 2; 1122 1123 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION; 1124 little_endian_store_16(event, pos, avdtp_cid); 1125 pos += 2; 1126 event[pos++] = local_seid; 1127 event[pos++] = remote_seid; 1128 event[pos++] = reconfigure; 1129 event[pos++] =AVDTP_CODEC_MPEG_2_4_AAC; 1130 1131 uint8_t object_type_bitmap = media_codec_information[0]; 1132 uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); 1133 uint8_t channels_bitmap = (media_codec_information[2] >> 2) & 0x03; 1134 uint8_t vbr = media_codec_information[3] >> 7; 1135 uint32_t bit_rate = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; 1136 1137 uint8_t object_type = 0; 1138 if (object_type_bitmap & 0x80){ 1139 object_type = AVDTP_AAC_MPEG2_LC; 1140 } else if (object_type_bitmap & 0x40){ 1141 object_type = AVDTP_AAC_MPEG4_LC; 1142 } else if (object_type_bitmap & 0x020){ 1143 object_type = AVDTP_AAC_MPEG4_LTP; 1144 } else if (object_type_bitmap & 0x010){ 1145 object_type = AVDTP_AAC_MPEG4_SCALABLE; 1146 } 1147 1148 uint32_t sampling_frequency = 0; 1149 uint8_t i; 1150 const uint32_t aac_sampling_frequency_table[] = { 1151 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 1152 }; 1153 for (i=0;i<12;i++){ 1154 if (sampling_frequency_bitmap & (1U << i)) { 1155 sampling_frequency = aac_sampling_frequency_table[i]; 1156 } 1157 } 1158 1159 uint8_t num_channels = 0; 1160 if (channels_bitmap & 0x02){ 1161 num_channels = 1; 1162 } else if (channels_bitmap & 0x01){ 1163 num_channels = 2; 1164 } 1165 1166 event[pos++] = object_type; 1167 little_endian_store_24(event, pos, sampling_frequency); 1168 pos += 3; 1169 event[pos++] = num_channels; 1170 little_endian_store_24(event, pos, bit_rate); 1171 pos += 3; 1172 event[pos++] = vbr; 1173 1174 btstack_assert(MEDIA_CONFIG_MPEG_AAC_EVENT_LEN == pos); 1175 1176 return pos; 1177 } 1178 1179 #define MEDIA_CONFIG_ATRAC_EVENT_LEN 18 1180 1181 static uint16_t avdtp_signaling_setup_media_codec_atrac_config_event(uint8_t *event, uint16_t size, 1182 avdtp_stream_endpoint_t *stream_endpoint, 1183 uint16_t avdtp_cid, uint8_t reconfigure, 1184 const uint8_t *media_codec_information) { 1185 btstack_assert(size >= MEDIA_CONFIG_ATRAC_EVENT_LEN); 1186 1187 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1188 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1189 1190 uint16_t pos = 0; 1191 event[pos++] = HCI_EVENT_AVDTP_META; 1192 event[pos++] = MEDIA_CONFIG_ATRAC_EVENT_LEN - 2; 1193 1194 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION; 1195 little_endian_store_16(event, pos, avdtp_cid); 1196 pos += 2; 1197 event[pos++] = local_seid; 1198 event[pos++] = remote_seid; 1199 event[pos++] = reconfigure; 1200 event[pos++] = AVDTP_CODEC_ATRAC_FAMILY; 1201 1202 avdtp_atrac_version_t version = (avdtp_atrac_version_t) (media_codec_information[0] >> 5); 1203 uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; 1204 uint16_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; 1205 uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; 1206 uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; 1207 uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; 1208 1209 uint8_t num_channels = 0; 1210 avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1211 if (channel_mode_bitmap & 0x04){ 1212 num_channels = 1; 1213 channel_mode = AVDTP_CHANNEL_MODE_MONO; 1214 } else if (channel_mode_bitmap & 0x02){ 1215 num_channels = 2; 1216 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1217 } else if (channel_mode_bitmap & 0x01){ 1218 num_channels = 2; 1219 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1220 } 1221 1222 uint16_t sampling_frequency = 0; 1223 if (sampling_frequency_bitmap & 0x02){ 1224 sampling_frequency = 44100; 1225 } else if (sampling_frequency_bitmap & 0x01){ 1226 sampling_frequency = 48000; 1227 } 1228 1229 // bit 0 = index 0x18, bit 19 = index 0 1230 uint8_t bit_rate_index = 0; 1231 uint8_t i; 1232 for (i=0;i <= 19;i++){ 1233 if (bit_rate_index_bitmap & (1U << i)) { 1234 bit_rate_index = 18 - i; 1235 } 1236 } 1237 1238 event[pos++] = (uint8_t) version; 1239 event[pos++] = (uint8_t) channel_mode; 1240 event[pos++] = num_channels; 1241 little_endian_store_16(event, pos, sampling_frequency); 1242 pos += 2; 1243 event[pos++] = vbr; 1244 event[pos++] = bit_rate_index; 1245 little_endian_store_16(event, pos, maximum_sul); 1246 pos += 2; 1247 1248 btstack_assert(pos == MEDIA_CONFIG_ATRAC_EVENT_LEN); 1249 return pos; 1250 } 1251 1252 #define MEDIA_CONFIG_OTHER_EVENT_LEN (13 + MAX_MEDIA_CODEC_INFORMATION_LENGTH) 1253 1254 static uint16_t avdtp_signaling_setup_media_codec_other_config_event(uint8_t *event, uint16_t size, 1255 avdtp_stream_endpoint_t *stream_endpoint, 1256 uint16_t avdtp_cid, uint8_t reconfigure, 1257 const adtvp_media_codec_capabilities_t *media_codec) { 1258 btstack_assert(size >= MEDIA_CONFIG_OTHER_EVENT_LEN); 1259 1260 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1261 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1262 1263 uint16_t pos = 0; 1264 event[pos++] = HCI_EVENT_AVDTP_META; 1265 pos++; // set later 1266 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 1267 little_endian_store_16(event, pos, avdtp_cid); 1268 pos += 2; 1269 event[pos++] = local_seid; 1270 event[pos++] = remote_seid; 1271 event[pos++] = reconfigure; 1272 event[pos++] = media_codec->media_type; 1273 little_endian_store_16(event, pos, media_codec->media_codec_type); 1274 pos += 2; 1275 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 1276 pos += 2; 1277 1278 btstack_assert(pos == 13); 1279 1280 uint16_t media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 1281 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 1282 pos += media_codec_len; 1283 event[1] = pos - 2; 1284 return pos; 1285 } 1286 1287 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 1288 uint8_t event[8]; 1289 int pos = 0; 1290 event[pos++] = HCI_EVENT_AVDTP_META; 1291 event[pos++] = sizeof(event) - 2; 1292 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 1293 little_endian_store_16(event, pos, avdtp_cid); 1294 pos += 2; 1295 event[pos++] = local_seid; 1296 little_endian_store_16(event, pos, delay); 1297 pos += 2; 1298 avdtp_emit_source(event, pos); 1299 } 1300 1301 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, 1302 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 1303 1304 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 1305 uint16_t pos = 0; 1306 // assume MEDIA_CONFIG_OTHER_EVENT_LEN is larger than all other events 1307 uint8_t event[MEDIA_CONFIG_OTHER_EVENT_LEN]; 1308 switch (configuration->media_codec.media_codec_type){ 1309 case AVDTP_CODEC_SBC: 1310 pos = avdtp_signaling_setup_media_codec_sbc_config_event(event, sizeof(event), stream_endpoint, 1311 avdtp_cid, reconfigure, 1312 configuration->media_codec.media_codec_information); 1313 break; 1314 case AVDTP_CODEC_MPEG_1_2_AUDIO: 1315 pos = avdtp_signaling_setup_media_codec_mpeg_audio_config_event(event, sizeof(event), stream_endpoint, 1316 avdtp_cid, reconfigure, 1317 configuration->media_codec.media_codec_information); 1318 break; 1319 case AVDTP_CODEC_MPEG_2_4_AAC: 1320 pos = avdtp_signaling_setup_media_codec_mpec_aac_config_event(event, 1321 sizeof(event), 1322 stream_endpoint, avdtp_cid, 1323 reconfigure, 1324 configuration->media_codec.media_codec_information); 1325 break; 1326 case AVDTP_CODEC_ATRAC_FAMILY: 1327 pos = avdtp_signaling_setup_media_codec_atrac_config_event(event, sizeof(event), stream_endpoint, 1328 avdtp_cid, 1329 reconfigure, 1330 configuration->media_codec.media_codec_information); 1331 break; 1332 default: 1333 pos = avdtp_signaling_setup_media_codec_other_config_event(event, sizeof(event), stream_endpoint, 1334 avdtp_cid, 1335 reconfigure, 1336 &configuration->media_codec); 1337 break; 1338 } 1339 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1340 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1341 } 1342 } 1343 1344 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 1345 uint8_t event[14]; 1346 int pos = 0; 1347 event[pos++] = HCI_EVENT_AVDTP_META; 1348 event[pos++] = sizeof(event) - 2; 1349 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 1350 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1351 pos += 2; 1352 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 1353 pos += 6; 1354 event[pos++] = avdtp_local_seid(stream_endpoint); 1355 event[pos++] = avdtp_remote_seid(stream_endpoint); 1356 event[pos++] = status; 1357 1358 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1359 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1360 } 1361 1362 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 1363 uint8_t event[6]; 1364 int pos = 0; 1365 event[pos++] = HCI_EVENT_AVDTP_META; 1366 event[pos++] = sizeof(event) - 2; 1367 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 1368 little_endian_store_16(event, pos, avdtp_cid); 1369 pos += 2; 1370 event[pos++] = local_seid; 1371 1372 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1373 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1374 } 1375 1376 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 1377 uint8_t event[8]; 1378 int pos = 0; 1379 event[pos++] = HCI_EVENT_AVDTP_META; 1380 event[pos++] = sizeof(event) - 2; 1381 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 1382 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1383 pos += 2; 1384 event[pos++] = avdtp_local_seid(stream_endpoint); 1385 little_endian_store_16(event, pos, sequence_number); 1386 pos += 2; 1387 event[1] = pos - 2; 1388 1389 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1390 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1391 } 1392 1393 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t *connection) { 1394 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1395 connection->wait_to_send_acceptor = true; 1396 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1397 return ERROR_CODE_SUCCESS; 1398 } 1399 1400 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t *connection) { 1401 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1402 connection->wait_to_send_initiator = true; 1403 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1404 return ERROR_CODE_SUCCESS; 1405 } 1406 1407 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1408 if (!stream_endpoint) return 0; 1409 return stream_endpoint->sep.seid; 1410 1411 } 1412 1413 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1414 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1415 return stream_endpoint->remote_sep.seid; 1416 } 1417 1418 // helper for A2DP 1419 1420 void a2dp_replace_subevent_id_and_emit_cmd(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t subevent_id){ 1421 UNUSED(size); 1422 btstack_assert(callback != NULL); 1423 // cache orig event and subevent id 1424 uint8_t orig_event_id = packet[0]; 1425 uint8_t orig_subevent_id = packet[2]; 1426 // execute callback 1427 packet[0] = HCI_EVENT_A2DP_META; 1428 packet[2] = subevent_id; 1429 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1430 // restore id 1431 packet[0] = orig_event_id; 1432 packet[2] = orig_subevent_id; 1433 } 1434 1435 void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t subevent_id){ 1436 uint8_t event[6]; 1437 int pos = 0; 1438 event[pos++] = HCI_EVENT_A2DP_META; 1439 event[pos++] = sizeof(event) - 2; 1440 event[pos++] = subevent_id; 1441 little_endian_store_16(event, pos, cid); 1442 pos += 2; 1443 event[pos++] = local_seid; 1444 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1445 } 1446 1447 // helper to set/get configuration 1448 void avdtp_config_sbc_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz){ 1449 avdtp_sbc_sampling_frequency_t sampling_frequency; 1450 switch (sampling_frequency_hz){ 1451 case 16000: 1452 sampling_frequency = AVDTP_SBC_16000; 1453 break; 1454 case 32000: 1455 sampling_frequency = AVDTP_SBC_32000; 1456 break; 1457 case 48000: 1458 sampling_frequency = AVDTP_SBC_48000; 1459 break; 1460 default: 1461 sampling_frequency = AVDTP_SBC_44100; 1462 break; 1463 } 1464 config[0] = (((uint8_t) sampling_frequency) << 4) | (config[0] & 0x0f); 1465 } 1466 1467 void avdtp_config_sbc_store(uint8_t * config, const avdtp_configuration_sbc_t * configuration){ 1468 avdtp_sbc_channel_mode_t sbc_channel_mode; 1469 switch (configuration->channel_mode){ 1470 case AVDTP_CHANNEL_MODE_MONO: 1471 sbc_channel_mode = AVDTP_SBC_MONO; 1472 break; 1473 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 1474 sbc_channel_mode = AVDTP_SBC_DUAL_CHANNEL; 1475 break; 1476 case AVDTP_CHANNEL_MODE_STEREO: 1477 sbc_channel_mode = AVDTP_SBC_STEREO; 1478 break; 1479 default: 1480 sbc_channel_mode = AVDTP_SBC_JOINT_STEREO; 1481 break; 1482 } 1483 config[0] = (uint8_t) sbc_channel_mode; 1484 config[1] = (configuration->block_length << 4) | (configuration->subbands << 2) | configuration->allocation_method; 1485 config[2] = configuration-> min_bitpool_value; 1486 config[3] = configuration->max_bitpool_value; 1487 avdtp_config_sbc_set_sampling_frequency(config, configuration->sampling_frequency); 1488 } 1489 1490 void avdtp_config_mpeg_audio_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 1491 uint8_t sampling_frequency_index = 0; 1492 switch (sampling_frequency_hz){ 1493 case 16000: 1494 sampling_frequency_index = 5; 1495 break; 1496 case 22040: 1497 sampling_frequency_index = 4; 1498 break; 1499 case 24000: 1500 sampling_frequency_index = 3; 1501 break; 1502 case 32000: 1503 sampling_frequency_index = 2; 1504 break; 1505 case 44100: 1506 sampling_frequency_index = 1; 1507 break; 1508 case 48000: 1509 sampling_frequency_index = 0; 1510 break; 1511 default: 1512 btstack_assert(false); 1513 break; 1514 } 1515 config[1] = (config[1] & 0xC0) | (1 << sampling_frequency_index); 1516 } 1517 1518 void avdtp_config_mpeg_audio_store(uint8_t * config, const avdtp_configuration_mpeg_audio_t * configuration){ 1519 1520 config[0] = (1 << (7 - (configuration->layer - AVDTP_MPEG_LAYER_1))) | ((configuration->crc & 0x01) << 4) | (1 << (configuration->channel_mode - AVDTP_CHANNEL_MODE_MONO)); 1521 config[1] = ((configuration->media_payload_format & 0x01) << 6) ; 1522 uint16_t bit_rate_mask = 1 << configuration->bit_rate_index; 1523 config[2] = ((configuration->vbr & 0x01) << 7) | ((bit_rate_mask >> 8) & 0x3f); 1524 config[3] = bit_rate_mask & 0xff; 1525 avdtp_config_mpeg_audio_set_sampling_frequency(config, configuration->sampling_frequency); 1526 } 1527 1528 1529 void avdtp_config_mpeg_aac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 1530 uint16_t sampling_frequency_bitmap = 0; 1531 uint8_t i; 1532 const uint32_t aac_sampling_frequency_table[] = { 1533 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 1534 }; 1535 for (i=0;i<12;i++){ 1536 if (sampling_frequency_hz == aac_sampling_frequency_table[i]){ 1537 sampling_frequency_bitmap = 1 << i; 1538 break; 1539 } 1540 } 1541 config[1] = sampling_frequency_bitmap >> 4; 1542 config[2] = ((sampling_frequency_bitmap & 0x0f) << 4) | (config[2] & 0x0f); 1543 } 1544 1545 void avdtp_config_mpeg_aac_store(uint8_t * config, const avdtp_configuration_mpeg_aac_t * configuration) { 1546 config[0] = 1 << (7 -(configuration->object_type - AVDTP_AAC_MPEG2_LC)); 1547 uint8_t channels_bitmap = 0; 1548 switch (configuration->channels){ 1549 case 1: 1550 channels_bitmap = 0x02; 1551 break; 1552 case 2: 1553 channels_bitmap = 0x01; 1554 break; 1555 default: 1556 break; 1557 } 1558 config[2] = channels_bitmap << 2; 1559 config[3] = ((configuration->vbr & 0x01) << 7) | ((configuration->bit_rate >> 16) & 0x7f); 1560 config[4] = (configuration->bit_rate >> 8) & 0xff; 1561 config[5] = configuration->bit_rate & 0xff; 1562 avdtp_config_mpeg_aac_set_sampling_frequency(config, configuration->sampling_frequency); 1563 } 1564 1565 void avdtp_config_atrac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 1566 uint8_t fs_bitmap = 0; 1567 switch (sampling_frequency_hz){ 1568 case 44100: 1569 fs_bitmap = 2; 1570 break; 1571 case 48000: 1572 fs_bitmap = 1; 1573 break; 1574 default: 1575 break; 1576 } 1577 config[1] = (fs_bitmap << 4) | (config[1] & 0x0F); 1578 } 1579 1580 void avdtp_config_atrac_store(uint8_t * config, const avdtp_configuration_atrac_t * configuration){ 1581 uint8_t channel_mode_bitmap = 0; 1582 switch (configuration->channel_mode){ 1583 case AVDTP_CHANNEL_MODE_MONO: 1584 channel_mode_bitmap = 4; 1585 break; 1586 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 1587 channel_mode_bitmap = 2; 1588 break; 1589 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 1590 channel_mode_bitmap = 1; 1591 break; 1592 default: 1593 break; 1594 } 1595 config[0] = ((configuration->version - AVDTP_ATRAC_VERSION_1 + 1) << 5) | (channel_mode_bitmap << 2); 1596 uint32_t bit_rate_bitmap = 1 << (0x18 - configuration->bit_rate_index); 1597 config[1] = ((configuration->vbr & 0x01) << 3) | ((bit_rate_bitmap >> 16) & 0x07); 1598 config[2] = (bit_rate_bitmap >> 8) & 0xff; 1599 config[3] = bit_rate_bitmap & 0xff; 1600 config[4] = configuration->maximum_sul >> 8; 1601 config[5] = configuration->maximum_sul & 0xff; 1602 config[6] = 0; 1603 avdtp_config_atrac_set_sampling_frequency(config, configuration->sampling_frequency); 1604 } 1605