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 BLUEKITCHEN 24 * GMBH 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 /* 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_info, 0, 8); 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 = false; 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) || (category > AVDTP_DELAY_REPORTING)){ 251 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 252 connection->reject_service_category = category; 253 connection->error_code = AVDTP_ERROR_CODE_BAD_SERV_CATEGORY; 254 return 1; 255 } 256 257 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 258 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 259 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 260 connection->reject_service_category = category; 261 connection->error_code = AVDTP_ERROR_CODE_INVALID_CAPABILITIES; 262 return 1; 263 } 264 } 265 266 switch(category){ 267 case AVDTP_MEDIA_TRANSPORT: 268 if (cap_len != 0){ 269 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 270 connection->reject_service_category = category; 271 connection->error_code = AVDTP_ERROR_CODE_BAD_MEDIA_TRANSPORT_FORMAT; 272 return 1; 273 } 274 break; 275 case AVDTP_REPORTING: 276 case AVDTP_DELAY_REPORTING: 277 if (cap_len != 0){ 278 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 279 connection->reject_service_category = category; 280 connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; 281 return 1; 282 } 283 break; 284 case AVDTP_RECOVERY: 285 if (cap_len != 3){ 286 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 287 connection->reject_service_category = category; 288 connection->error_code = AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT; 289 return 1; 290 } 291 break; 292 case AVDTP_CONTENT_PROTECTION: 293 if (cap_len < 2){ 294 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 295 connection->reject_service_category = category; 296 connection->error_code = AVDTP_ERROR_CODE_BAD_CP_FORMAT; 297 return 1; 298 } 299 break; 300 case AVDTP_HEADER_COMPRESSION: 301 // TODO: find error code for bad header compression 302 if (cap_len != 1){ 303 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 304 connection->reject_service_category = category; 305 connection->error_code = AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT; 306 return 1; 307 } 308 break; 309 case AVDTP_MULTIPLEXING: 310 break; 311 case AVDTP_MEDIA_CODEC: 312 break; 313 default: 314 break; 315 } 316 return 0; 317 } 318 319 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){ 320 321 int i; 322 323 uint16_t registered_service_categories = 0; 324 uint16_t to_process = size; 325 326 while (to_process >= 2){ 327 328 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 329 uint8_t cap_len = packet[1]; 330 packet += 2; 331 to_process -= 2; 332 333 if (cap_len > to_process){ 334 connection->reject_service_category = category; 335 connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; 336 return 0; 337 } 338 339 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 340 341 int category_valid = 1; 342 343 uint8_t * data = packet; 344 uint16_t pos = 0; 345 346 switch(category){ 347 case AVDTP_RECOVERY: 348 caps->recovery.recovery_type = data[pos++]; 349 caps->recovery.maximum_recovery_window_size = data[pos++]; 350 caps->recovery.maximum_number_media_packets = data[pos++]; 351 break; 352 case AVDTP_CONTENT_PROTECTION: 353 caps->content_protection.cp_type = big_endian_read_16(data, 0); 354 caps->content_protection.cp_type_value_len = cap_len - 2; 355 // connection->reject_service_category = category; 356 // connection->error_code = UNSUPPORTED_CONFIGURATION; 357 // support for content protection goes here 358 break; 359 case AVDTP_HEADER_COMPRESSION: 360 caps->header_compression.back_ch = (data[0] >> 7) & 1; 361 caps->header_compression.media = (data[0] >> 6) & 1; 362 caps->header_compression.recovery = (data[0] >> 5) & 1; 363 break; 364 case AVDTP_MULTIPLEXING: 365 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 366 // read [tsid, tcid] for media, reporting. recovery respectively 367 caps->multiplexing_mode.transport_identifiers_num = 3; 368 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 369 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 370 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 371 } 372 break; 373 case AVDTP_MEDIA_CODEC: 374 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 375 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 376 caps->media_codec.media_codec_information_len = cap_len - 2; 377 caps->media_codec.media_codec_information = &data[pos++]; 378 break; 379 case AVDTP_MEDIA_TRANSPORT: 380 case AVDTP_REPORTING: 381 case AVDTP_DELAY_REPORTING: 382 break; 383 default: 384 category_valid = 0; 385 break; 386 } 387 388 if (category_valid) { 389 registered_service_categories = store_bit16(registered_service_categories, category, 1); 390 } 391 392 packet += cap_len; 393 to_process -= cap_len; 394 } 395 396 return registered_service_categories; 397 } 398 399 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){ 400 if (signaling_packet->offset) return; 401 bool basic_capabilities_only = false; 402 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 403 int i; 404 405 signaling_packet->size = 0; 406 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 407 408 switch (identifier) { 409 case AVDTP_SI_GET_CAPABILITIES: 410 basic_capabilities_only = true; 411 break; 412 case AVDTP_SI_GET_ALL_CAPABILITIES: 413 break; 414 case AVDTP_SI_SET_CONFIGURATION: 415 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 416 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 417 signaling_packet->message_type = AVDTP_CMD_MSG; 418 break; 419 case AVDTP_SI_RECONFIGURE: 420 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 421 signaling_packet->message_type = AVDTP_CMD_MSG; 422 break; 423 default: 424 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 425 break; 426 } 427 428 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 429 int registered_category = get_bit16(service_categories, i); 430 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 431 // TODO: introduce bitmap of mandatory categories 432 if (i == AVDTP_MEDIA_TRANSPORT){ 433 registered_category = true; 434 } 435 } 436 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 437 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 438 registered_category = false; 439 } 440 441 if (registered_category){ 442 // service category 443 signaling_packet->command[signaling_packet->size++] = i; 444 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 445 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 446 } 447 } 448 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 449 signaling_packet->transaction_label = transaction_label; 450 } 451 452 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 453 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 454 int data_len = 0; 455 456 uint16_t offset = signaling_packet->offset; 457 uint16_t pos = 1; 458 459 if (offset == 0){ 460 if (signaling_packet->size <= (mtu - 2)){ 461 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 462 out_buffer[pos++] = signaling_packet->signal_identifier; 463 data_len = signaling_packet->size; 464 } else { 465 signaling_packet->packet_type = AVDTP_START_PACKET; 466 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 467 out_buffer[pos++] = signaling_packet->signal_identifier; 468 data_len = mtu - 3; 469 signaling_packet->offset = data_len; 470 } 471 } else { 472 int remaining_bytes = signaling_packet->size - offset; 473 if (remaining_bytes <= (mtu - 1)){ 474 signaling_packet->packet_type = AVDTP_END_PACKET; 475 data_len = remaining_bytes; 476 signaling_packet->offset = 0; 477 } else{ 478 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 479 data_len = mtu - 1; 480 signaling_packet->offset += data_len; 481 } 482 } 483 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 484 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 485 data_len); 486 pos += data_len; 487 return pos; 488 } 489 490 491 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { 492 uint8_t event[14]; 493 int pos = 0; 494 event[pos++] = HCI_EVENT_AVDTP_META; 495 event[pos++] = sizeof(event) - 2; 496 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 497 little_endian_store_16(event, pos, avdtp_cid); 498 pos += 2; 499 reverse_bd_addr(addr,&event[pos]); 500 pos += 6; 501 little_endian_store_16(event, pos, con_handle); 502 pos += 2; 503 event[pos++] = status; 504 avdtp_emit_sink_and_source(event, pos); 505 } 506 507 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 508 uint8_t event[5]; 509 int pos = 0; 510 event[pos++] = HCI_EVENT_AVDTP_META; 511 event[pos++] = sizeof(event) - 2; 512 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 513 little_endian_store_16(event, pos, avdtp_cid); 514 pos += 2; 515 avdtp_emit_sink_and_source(event, pos); 516 } 517 518 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 519 uint8_t event[9]; 520 int pos = 0; 521 event[pos++] = HCI_EVENT_AVDTP_META; 522 event[pos++] = sizeof(event) - 2; 523 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 524 little_endian_store_16(event, pos, avdtp_cid); 525 pos += 2; 526 event[pos++] = sep.seid; 527 event[pos++] = sep.in_use; 528 event[pos++] = sep.media_type; 529 event[pos++] = sep.type; 530 avdtp_emit_sink_and_source(event, pos); 531 } 532 533 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 534 uint8_t event[5]; 535 int pos = 0; 536 event[pos++] = HCI_EVENT_AVDTP_META; 537 event[pos++] = sizeof(event) - 2; 538 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 539 little_endian_store_16(event, pos, avdtp_cid); 540 pos += 2; 541 avdtp_emit_sink_and_source(event, pos); 542 } 543 544 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 545 uint8_t event[8]; 546 int pos = 0; 547 event[pos++] = HCI_EVENT_AVDTP_META; 548 event[pos++] = sizeof(event) - 2; 549 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 550 little_endian_store_16(event, pos, avdtp_cid); 551 pos += 2; 552 event[pos++] = local_seid; 553 event[pos++] = is_initiator ? 1 : 0; 554 event[pos++] = identifier; 555 avdtp_emit_sink_and_source(event, pos); 556 } 557 558 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){ 559 uint8_t event[8]; 560 int pos = 0; 561 event[pos++] = HCI_EVENT_AVDTP_META; 562 event[pos++] = sizeof(event) - 2; 563 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 564 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 565 pos += 2; 566 event[pos++] = local_seid; 567 event[pos++] = is_initiator ? 1 : 0; 568 event[pos++] = identifier; 569 570 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 571 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 572 } 573 574 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 575 uint8_t event[8]; 576 int pos = 0; 577 event[pos++] = HCI_EVENT_AVDTP_META; 578 event[pos++] = sizeof(event) - 2; 579 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 580 little_endian_store_16(event, pos, avdtp_cid); 581 pos += 2; 582 event[pos++] = local_seid; 583 event[pos++] = is_initiator ? 1 : 0; 584 event[pos++] = identifier; 585 avdtp_emit_sink_and_source(event, pos); 586 } 587 588 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 589 uint8_t event[8]; 590 int pos = 0; 591 event[pos++] = HCI_EVENT_AVDTP_META; 592 event[pos++] = sizeof(event) - 2; 593 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 594 little_endian_store_16(event, pos, avdtp_cid); 595 pos += 2; 596 event[pos++] = local_seid; 597 event[pos++] = is_initiator ? 1 : 0; 598 event[pos++] = identifier; 599 avdtp_emit_sink_and_source(event, pos); 600 } 601 602 static inline void 603 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t remote_seid) { 604 uint8_t event[6]; 605 int pos = 0; 606 event[pos++] = HCI_EVENT_AVDTP_META; 607 event[pos++] = sizeof(event) - 2; 608 event[pos++] = capability_subevent_id; 609 little_endian_store_16(event, pos, avdtp_cid); 610 pos += 2; 611 event[pos++] = remote_seid; 612 avdtp_emit_sink_and_source(event, pos); 613 } 614 615 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 616 const uint8_t * media_codec_information = media_codec.media_codec_information; 617 uint8_t event[14]; 618 int pos = 0; 619 event[pos++] = HCI_EVENT_AVDTP_META; 620 event[pos++] = sizeof(event) - 2; 621 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 622 little_endian_store_16(event, pos, avdtp_cid); 623 pos += 2; 624 event[pos++] = remote_seid; 625 event[pos++] = media_codec.media_type; 626 event[pos++] = media_codec_information[0] >> 4; 627 event[pos++] = media_codec_information[0] & 0x0F; 628 event[pos++] = media_codec_information[1] >> 4; 629 event[pos++] = (media_codec_information[1] & 0x0F) >> 2; 630 event[pos++] = media_codec_information[1] & 0x03; 631 event[pos++] = media_codec_information[2]; 632 event[pos++] = media_codec_information[3]; 633 avdtp_emit_sink_and_source(event, pos); 634 } 635 636 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) { 637 const uint8_t * media_codec_information = media_codec.media_codec_information; 638 uint8_t event[15]; 639 int pos = 0; 640 event[pos++] = HCI_EVENT_AVDTP_META; 641 event[pos++] = sizeof(event) - 2; 642 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY; 643 little_endian_store_16(event, pos, avdtp_cid); 644 pos += 2; 645 event[pos++] = remote_seid; 646 event[pos++] = media_codec.media_type; 647 648 uint8_t layer_bitmap = media_codec_information[0] >> 5; 649 uint8_t crc = (media_codec_information[0] >> 4) & 0x01; 650 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x07; 651 uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; 652 uint8_t sampling_frequency_bitmap = media_codec_information[1] & 0x3F; 653 uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; 654 uint16_t bit_rate_index_bitmap = ((media_codec_information[3] & 0x3f) << 8) | media_codec.media_codec_information[4]; 655 656 event[pos++] = layer_bitmap; 657 event[pos++] = crc; 658 event[pos++] = channel_mode_bitmap; 659 event[pos++] = mpf; 660 event[pos++] = sampling_frequency_bitmap; 661 event[pos++] = vbr; 662 little_endian_store_16(event, pos, bit_rate_index_bitmap); // bit rate index 663 pos += 2; 664 avdtp_emit_sink_and_source(event, pos); 665 } 666 667 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) { 668 const uint8_t * media_codec_information = media_codec.media_codec_information; 669 uint8_t event[15]; 670 int pos = 0; 671 event[pos++] = HCI_EVENT_AVDTP_META; 672 event[pos++] = sizeof(event) - 2; 673 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY; 674 little_endian_store_16(event, pos, avdtp_cid); 675 pos += 2; 676 event[pos++] = remote_seid; 677 event[pos++] = media_codec.media_type; 678 679 uint8_t object_type_bitmap = media_codec_information[0]; 680 uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); 681 uint8_t channels_bitmap = (media_codec_information[2] >> 2) & 0x03; 682 uint32_t bit_rate_bitmap = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; 683 uint8_t vbr = media_codec_information[3] >> 7; 684 685 event[pos++] = object_type_bitmap; 686 little_endian_store_16(event, pos, sampling_frequency_bitmap); 687 pos += 2; 688 event[pos++] = channels_bitmap; 689 little_endian_store_24(event, pos, bit_rate_bitmap); 690 pos += 3; 691 event[pos++] = vbr; 692 avdtp_emit_sink_and_source(event, pos); 693 } 694 695 static void avdtp_signaling_emit_media_codec_atrac_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 696 const uint8_t * media_codec_information = media_codec.media_codec_information; 697 uint8_t event[16]; 698 int pos = 0; 699 event[pos++] = HCI_EVENT_AVDTP_META; 700 pos++; // set later 701 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY; 702 little_endian_store_16(event, pos, avdtp_cid); 703 pos += 2; 704 event[pos++] = remote_seid; 705 event[pos++] = media_codec.media_type; 706 707 uint8_t version = media_codec_information[0] >> 5; 708 uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; 709 uint8_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; 710 uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; 711 uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; 712 uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; 713 714 event[pos++] = version; 715 event[pos++] = channel_mode_bitmap; 716 event[pos++] = sampling_frequency_bitmap; 717 event[pos++] = vbr; 718 little_endian_store_24(event, pos, bit_rate_index_bitmap); 719 pos += 3; 720 little_endian_store_16(event, pos, maximum_sul); 721 pos += 2; 722 event[1] = pos - 2; 723 avdtp_emit_sink_and_source(event, pos); 724 } 725 726 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 727 uint8_t event[AVDTP_MAX_MEDIA_CODEC_INFORMATION_LENGTH + 11]; 728 int pos = 0; 729 event[pos++] = HCI_EVENT_AVDTP_META; 730 pos++; // set later 731 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 732 little_endian_store_16(event, pos, avdtp_cid); 733 pos += 2; 734 event[pos++] = remote_seid; 735 event[pos++] = media_codec.media_type; 736 little_endian_store_16(event, pos, media_codec.media_codec_type); 737 pos += 2; 738 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 739 pos += 2; 740 uint32_t media_codec_info_len = btstack_min(media_codec.media_codec_information_len, AVDTP_MAX_MEDIA_CODEC_INFORMATION_LENGTH); 741 (void)memcpy(event + pos, media_codec.media_codec_information, media_codec_info_len); 742 pos += media_codec_info_len; 743 event[1] = pos - 2; 744 avdtp_emit_sink_and_source(event, pos); 745 } 746 747 static void 748 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 749 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, 750 remote_seid); 751 } 752 753 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 754 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, remote_seid); 755 } 756 757 static void 758 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 759 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, 760 remote_seid); 761 } 762 763 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_recovery_capabilities_t *recovery) { 764 uint8_t event[9]; 765 int pos = 0; 766 event[pos++] = HCI_EVENT_AVDTP_META; 767 event[pos++] = sizeof(event) - 2; 768 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 769 little_endian_store_16(event, pos, avdtp_cid); 770 pos += 2; 771 event[pos++] = remote_seid; 772 event[pos++] = recovery->recovery_type; 773 event[pos++] = recovery->maximum_recovery_window_size; 774 event[pos++] = recovery->maximum_number_media_packets; 775 avdtp_emit_sink_and_source(event, pos); 776 } 777 778 #define MAX_CONTENT_PROTECTION_VALUE_LEN 32 779 static void 780 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_content_protection_t *content_protection) { 781 uint8_t event[10 + MAX_CONTENT_PROTECTION_VALUE_LEN]; 782 int pos = 0; 783 event[pos++] = HCI_EVENT_AVDTP_META; 784 pos++; // set later 785 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 786 little_endian_store_16(event, pos, avdtp_cid); 787 pos += 2; 788 event[pos++] = remote_seid; 789 790 little_endian_store_16(event, pos, content_protection->cp_type); 791 pos += 2; 792 793 // drop cp protection value if longer than expected 794 if (content_protection->cp_type_value_len <= MAX_CONTENT_PROTECTION_VALUE_LEN){ 795 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 796 pos += 2; 797 (void)memcpy(event + pos, content_protection->cp_type_value, content_protection->cp_type_value_len); 798 pos += content_protection->cp_type_value_len; 799 } else { 800 little_endian_store_16(event, pos, 0); 801 pos += 2; 802 } 803 event[1] = pos - 2; 804 avdtp_emit_sink_and_source(event, pos); 805 } 806 807 808 static void 809 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_header_compression_capabilities_t *header_compression) { 810 uint8_t event[9]; 811 int pos = 0; 812 event[pos++] = HCI_EVENT_AVDTP_META; 813 event[pos++] = sizeof(event) - 2; 814 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 815 little_endian_store_16(event, pos, avdtp_cid); 816 pos += 2; 817 event[pos++] = remote_seid; 818 event[pos++] = header_compression->back_ch; 819 event[pos++] = header_compression->media; 820 event[pos++] = header_compression->recovery; 821 avdtp_emit_sink_and_source(event, pos); 822 } 823 824 static void 825 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 826 uint8_t event[14]; 827 int pos = 0; 828 event[pos++] = HCI_EVENT_AVDTP_META; 829 event[pos++] = sizeof(event) - 2; 830 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 831 little_endian_store_16(event, pos, avdtp_cid); 832 pos += 2; 833 event[pos++] = remote_seid; 834 835 event[pos++] = multiplexing_mode->fragmentation; 836 event[pos++] = multiplexing_mode->transport_identifiers_num; 837 838 int i; 839 for (i = 0; i < 3; i++){ 840 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 841 } 842 for (i = 0; i < 3; i++){ 843 event[pos++] = multiplexing_mode->tcid[i]; 844 } 845 avdtp_emit_sink_and_source(event, pos); 846 } 847 848 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t remote_seid) { 849 uint8_t event[6]; 850 int pos = 0; 851 event[pos++] = HCI_EVENT_AVDTP_META; 852 event[pos++] = sizeof(event) - 2; 853 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 854 little_endian_store_16(event, pos, avdtp_cid); 855 pos += 2; 856 event[pos++] = remote_seid; 857 avdtp_emit_sink_and_source(event, pos); 858 } 859 860 static void avdtp_signaling_emit_media_codec_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 861 switch (media_codec.media_codec_type){ 862 case AVDTP_CODEC_SBC: 863 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, remote_seid, media_codec); 864 break; 865 case AVDTP_CODEC_MPEG_1_2_AUDIO: 866 avdtp_signaling_emit_media_codec_mpeg_audio_capability(avdtp_cid, remote_seid, media_codec); 867 break; 868 case AVDTP_CODEC_MPEG_2_4_AAC: 869 avdtp_signaling_emit_media_codec_mpeg_aac_capability(avdtp_cid, remote_seid, media_codec); 870 break; 871 case AVDTP_CODEC_ATRAC_FAMILY: 872 avdtp_signaling_emit_media_codec_atrac_capability(avdtp_cid, remote_seid, media_codec); 873 break; 874 default: 875 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, remote_seid, media_codec); 876 break; 877 } 878 } 879 880 // emit events for all capabilities incl. final done event 881 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 882 uint16_t registered_service_categories) { 883 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 884 avdtp_signaling_emit_media_codec_capability(avdtp_cid, remote_seid, capabilities->media_codec); 885 } 886 887 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 888 avdtp_signaling_emit_media_transport_capability(avdtp_cid, remote_seid); 889 } 890 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 891 avdtp_signaling_emit_reporting_capability(avdtp_cid, remote_seid); 892 } 893 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 894 avdtp_signaling_emit_recovery_capability(avdtp_cid, remote_seid, &capabilities->recovery); 895 } 896 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 897 avdtp_signaling_emit_content_protection_capability(avdtp_cid, remote_seid, 898 &capabilities->content_protection); 899 } 900 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 901 avdtp_signaling_emit_header_compression_capability(avdtp_cid, remote_seid, 902 &capabilities->header_compression); 903 } 904 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 905 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, remote_seid, 906 &capabilities->multiplexing_mode); 907 } 908 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 909 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, remote_seid); 910 } 911 avdtp_signaling_emit_capability_done(avdtp_cid, remote_seid); 912 } 913 914 static uint16_t 915 avdtp_signaling_setup_media_codec_sbc_config_event(uint8_t *event, uint16_t size, 916 const avdtp_stream_endpoint_t *stream_endpoint, 917 uint16_t avdtp_cid, uint8_t reconfigure, 918 const uint8_t *media_codec_information) { 919 920 btstack_assert(size >= AVDTP_MEDIA_CONFIG_SBC_EVENT_LEN); 921 922 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 923 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 924 925 int pos = 0; 926 event[pos++] = HCI_EVENT_AVDTP_META; 927 event[pos++] = AVDTP_MEDIA_CONFIG_SBC_EVENT_LEN - 2; 928 929 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 930 little_endian_store_16(event, pos, avdtp_cid); 931 pos += 2; 932 event[pos++] = local_seid; 933 event[pos++] = remote_seid; 934 event[pos++] = reconfigure; 935 event[pos++] = AVDTP_CODEC_SBC; 936 937 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 938 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 939 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 940 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 941 942 uint8_t num_channels = 0; 943 avdtp_channel_mode_t channel_mode; 944 945 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 946 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 947 num_channels = 2; 948 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 949 channel_mode = AVDTP_CHANNEL_MODE_STEREO; 950 num_channels = 2; 951 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 952 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 953 num_channels = 2; 954 } else { 955 channel_mode = AVDTP_CHANNEL_MODE_MONO; 956 num_channels = 1; 957 } 958 959 uint16_t sampling_frequency = 0; 960 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 961 sampling_frequency = 48000; 962 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 963 sampling_frequency = 44100; 964 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 965 sampling_frequency = 32000; 966 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 967 sampling_frequency = 16000; 968 } 969 970 uint8_t subbands = 0; 971 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 972 subbands = 8; 973 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 974 subbands = 4; 975 } 976 977 uint8_t block_length = 0; 978 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 979 block_length = 16; 980 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 981 block_length = 12; 982 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 983 block_length = 8; 984 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 985 block_length = 4; 986 } 987 988 little_endian_store_16(event, pos, sampling_frequency); 989 pos += 2; 990 991 event[pos++] = (uint8_t) channel_mode; 992 event[pos++] = num_channels; 993 event[pos++] = block_length; 994 event[pos++] = subbands; 995 event[pos++] = media_codec_information[1] & 0x03; 996 event[pos++] = media_codec_information[2]; 997 event[pos++] = media_codec_information[3]; 998 999 btstack_assert(pos == AVDTP_MEDIA_CONFIG_SBC_EVENT_LEN); 1000 1001 return pos; 1002 } 1003 1004 static uint16_t 1005 avdtp_signaling_setup_media_codec_mpeg_audio_config_event(uint8_t *event, uint16_t size, 1006 const avdtp_stream_endpoint_t *stream_endpoint, 1007 uint16_t avdtp_cid, uint8_t reconfigure, 1008 const uint8_t *media_codec_information) { 1009 1010 btstack_assert(size >= AVDTP_MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); 1011 1012 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1013 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1014 1015 uint16_t pos = 0; 1016 event[pos++] = HCI_EVENT_AVDTP_META; 1017 event[pos++] = AVDTP_MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN - 2; 1018 1019 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION; 1020 little_endian_store_16(event, pos, avdtp_cid); 1021 pos += 2; 1022 event[pos++] = local_seid; 1023 event[pos++] = remote_seid; 1024 event[pos++] = reconfigure; 1025 event[pos++] = AVDTP_CODEC_MPEG_1_2_AUDIO; 1026 1027 uint8_t layer_bitmap = media_codec_information[0] >> 5; 1028 uint8_t crc = (media_codec_information[0] >> 4) & 0x01; 1029 uint8_t channel_mode_bitmap = (media_codec_information[0] & 0x07); 1030 uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; 1031 uint8_t sampling_frequency_bitmap = (media_codec_information[1] & 0x3F); 1032 uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; 1033 uint16_t bit_rate_index_bitmap = ((media_codec_information[2] & 0x3f) << 8) | media_codec_information[3]; 1034 1035 uint8_t layer = 0; 1036 if (layer_bitmap & 0x04){ 1037 layer = AVDTP_MPEG_LAYER_1; 1038 } else if (layer_bitmap & 0x02){ 1039 layer = AVDTP_MPEG_LAYER_2; 1040 } else if (layer_bitmap & 0x01){ 1041 layer = AVDTP_MPEG_LAYER_3; 1042 } 1043 1044 uint8_t num_channels = 0; 1045 avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1046 if (channel_mode_bitmap & 0x08){ 1047 num_channels = 1; 1048 channel_mode = AVDTP_CHANNEL_MODE_MONO; 1049 } else if (channel_mode_bitmap & 0x04){ 1050 num_channels = 2; 1051 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1052 } else if (channel_mode_bitmap & 0x02){ 1053 num_channels = 2; 1054 channel_mode = AVDTP_CHANNEL_MODE_STEREO; 1055 } else if (channel_mode_bitmap & 0x02){ 1056 num_channels = 2; 1057 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1058 } 1059 1060 uint16_t sampling_frequency = 0; 1061 if (sampling_frequency_bitmap & 0x01) { 1062 sampling_frequency = 48000; 1063 } else if (sampling_frequency_bitmap & 0x02) { 1064 sampling_frequency = 44100; 1065 } else if (sampling_frequency_bitmap & 0x04) { 1066 sampling_frequency = 32000; 1067 } else if (sampling_frequency_bitmap & 0x08) { 1068 sampling_frequency = 24000; 1069 } else if (sampling_frequency_bitmap & 0x10) { 1070 sampling_frequency = 22050; 1071 } else if (sampling_frequency_bitmap & 0x20) { 1072 sampling_frequency = 16000; 1073 } 1074 1075 uint8_t bitrate_index = 0; 1076 uint8_t i; 1077 for (i=0;i<14;i++){ 1078 if (bit_rate_index_bitmap & (1U << i)) { 1079 bitrate_index = i; 1080 } 1081 } 1082 1083 event[pos++] = (uint8_t) layer; 1084 event[pos++] = crc; 1085 event[pos++] = (uint8_t) channel_mode; 1086 event[pos++] = num_channels; 1087 event[pos++] = mpf; 1088 little_endian_store_16(event, pos, sampling_frequency); 1089 pos += 2; 1090 event[pos++] = vbr; 1091 event[pos++] = bitrate_index; 1092 1093 btstack_assert(pos == AVDTP_MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); 1094 1095 return pos; 1096 } 1097 1098 static uint16_t 1099 avdtp_signaling_setup_media_codec_mpec_aac_config_event(uint8_t *event, uint16_t size, 1100 const avdtp_stream_endpoint_t *stream_endpoint, 1101 uint16_t avdtp_cid, uint8_t reconfigure, 1102 const uint8_t *media_codec_information) { 1103 1104 btstack_assert(size >= AVDTP_MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); 1105 1106 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1107 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1108 1109 uint16_t pos = 0; 1110 event[pos++] = HCI_EVENT_AVDTP_META; 1111 event[pos++] = AVDTP_MEDIA_CONFIG_MPEG_AAC_EVENT_LEN - 2; 1112 1113 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION; 1114 little_endian_store_16(event, pos, avdtp_cid); 1115 pos += 2; 1116 event[pos++] = local_seid; 1117 event[pos++] = remote_seid; 1118 event[pos++] = reconfigure; 1119 event[pos++] =AVDTP_CODEC_MPEG_2_4_AAC; 1120 1121 uint8_t object_type_bitmap = media_codec_information[0]; 1122 uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); 1123 uint8_t channels_bitmap = (media_codec_information[2] >> 2) & 0x03; 1124 uint8_t vbr = media_codec_information[3] >> 7; 1125 uint32_t bit_rate = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; 1126 1127 uint8_t object_type = 0; 1128 if (object_type_bitmap & 0x80){ 1129 object_type = AVDTP_AAC_MPEG2_LC; 1130 } else if (object_type_bitmap & 0x40){ 1131 object_type = AVDTP_AAC_MPEG4_LC; 1132 } else if (object_type_bitmap & 0x020){ 1133 object_type = AVDTP_AAC_MPEG4_LTP; 1134 } else if (object_type_bitmap & 0x010){ 1135 object_type = AVDTP_AAC_MPEG4_SCALABLE; 1136 } 1137 1138 uint32_t sampling_frequency = 0; 1139 uint8_t i; 1140 const uint32_t aac_sampling_frequency_table[] = { 1141 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 1142 }; 1143 for (i=0;i<12;i++){ 1144 if (sampling_frequency_bitmap & (1U << i)) { 1145 sampling_frequency = aac_sampling_frequency_table[i]; 1146 } 1147 } 1148 1149 uint8_t num_channels = 0; 1150 if (channels_bitmap & 0x02){ 1151 num_channels = 1; 1152 } else if (channels_bitmap & 0x01){ 1153 num_channels = 2; 1154 } 1155 1156 event[pos++] = object_type; 1157 little_endian_store_24(event, pos, sampling_frequency); 1158 pos += 3; 1159 event[pos++] = num_channels; 1160 little_endian_store_24(event, pos, bit_rate); 1161 pos += 3; 1162 event[pos++] = vbr; 1163 1164 btstack_assert(AVDTP_MEDIA_CONFIG_MPEG_AAC_EVENT_LEN == pos); 1165 1166 return pos; 1167 } 1168 1169 static uint16_t avdtp_signaling_setup_media_codec_atrac_config_event(uint8_t *event, uint16_t size, 1170 const avdtp_stream_endpoint_t *stream_endpoint, 1171 uint16_t avdtp_cid, uint8_t reconfigure, 1172 const uint8_t *media_codec_information) { 1173 btstack_assert(size >= AVDTP_MEDIA_CONFIG_ATRAC_EVENT_LEN); 1174 1175 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1176 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1177 1178 uint16_t pos = 0; 1179 event[pos++] = HCI_EVENT_AVDTP_META; 1180 event[pos++] = AVDTP_MEDIA_CONFIG_ATRAC_EVENT_LEN - 2; 1181 1182 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION; 1183 little_endian_store_16(event, pos, avdtp_cid); 1184 pos += 2; 1185 event[pos++] = local_seid; 1186 event[pos++] = remote_seid; 1187 event[pos++] = reconfigure; 1188 event[pos++] = AVDTP_CODEC_ATRAC_FAMILY; 1189 1190 avdtp_atrac_version_t version = (avdtp_atrac_version_t) (media_codec_information[0] >> 5); 1191 uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; 1192 uint16_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; 1193 uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; 1194 uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; 1195 uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; 1196 1197 uint8_t num_channels = 0; 1198 avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1199 if (channel_mode_bitmap & 0x04){ 1200 num_channels = 1; 1201 channel_mode = AVDTP_CHANNEL_MODE_MONO; 1202 } else if (channel_mode_bitmap & 0x02){ 1203 num_channels = 2; 1204 channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1205 } else if (channel_mode_bitmap & 0x01){ 1206 num_channels = 2; 1207 channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; 1208 } 1209 1210 uint16_t sampling_frequency = 0; 1211 if (sampling_frequency_bitmap & 0x02){ 1212 sampling_frequency = 44100; 1213 } else if (sampling_frequency_bitmap & 0x01){ 1214 sampling_frequency = 48000; 1215 } 1216 1217 // bit 0 = index 0x18, bit 19 = index 0 1218 uint8_t bit_rate_index = 0; 1219 uint8_t i; 1220 for (i=0;i <= 19;i++){ 1221 if (bit_rate_index_bitmap & (1U << i)) { 1222 bit_rate_index = 18 - i; 1223 } 1224 } 1225 1226 event[pos++] = (uint8_t) version; 1227 event[pos++] = (uint8_t) channel_mode; 1228 event[pos++] = num_channels; 1229 little_endian_store_16(event, pos, sampling_frequency); 1230 pos += 2; 1231 event[pos++] = vbr; 1232 event[pos++] = bit_rate_index; 1233 little_endian_store_16(event, pos, maximum_sul); 1234 pos += 2; 1235 1236 btstack_assert(pos == AVDTP_MEDIA_CONFIG_ATRAC_EVENT_LEN); 1237 return pos; 1238 } 1239 1240 static uint16_t avdtp_signaling_setup_media_codec_other_config_event(uint8_t *event, uint16_t size, 1241 const avdtp_stream_endpoint_t *stream_endpoint, 1242 uint16_t avdtp_cid, uint8_t reconfigure, 1243 const adtvp_media_codec_capabilities_t *media_codec) { 1244 btstack_assert(size >= AVDTP_MEDIA_CONFIG_OTHER_EVENT_LEN); 1245 1246 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 1247 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 1248 1249 uint16_t pos = 0; 1250 event[pos++] = HCI_EVENT_AVDTP_META; 1251 pos++; // set later 1252 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 1253 little_endian_store_16(event, pos, avdtp_cid); 1254 pos += 2; 1255 event[pos++] = local_seid; 1256 event[pos++] = remote_seid; 1257 event[pos++] = reconfigure; 1258 event[pos++] = media_codec->media_type; 1259 little_endian_store_16(event, pos, media_codec->media_codec_type); 1260 pos += 2; 1261 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 1262 pos += 2; 1263 1264 btstack_assert(pos == 13); 1265 1266 uint16_t media_codec_len = btstack_min(AVDTP_MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 1267 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 1268 pos += media_codec_len; 1269 event[1] = pos - 2; 1270 return pos; 1271 } 1272 1273 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 1274 uint8_t event[8]; 1275 int pos = 0; 1276 event[pos++] = HCI_EVENT_AVDTP_META; 1277 event[pos++] = sizeof(event) - 2; 1278 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 1279 little_endian_store_16(event, pos, avdtp_cid); 1280 pos += 2; 1281 event[pos++] = local_seid; 1282 little_endian_store_16(event, pos, delay); 1283 pos += 2; 1284 avdtp_emit_source(event, pos); 1285 } 1286 1287 uint16_t avdtp_setup_media_codec_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, 1288 uint16_t avdtp_cid, uint8_t reconfigure, 1289 const adtvp_media_codec_capabilities_t * media_codec) { 1290 switch (media_codec->media_codec_type){ 1291 case AVDTP_CODEC_SBC: 1292 return avdtp_signaling_setup_media_codec_sbc_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, 1293 media_codec->media_codec_information); 1294 case AVDTP_CODEC_MPEG_1_2_AUDIO: 1295 return avdtp_signaling_setup_media_codec_mpeg_audio_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, 1296 media_codec->media_codec_information); 1297 case AVDTP_CODEC_MPEG_2_4_AAC: 1298 return avdtp_signaling_setup_media_codec_mpec_aac_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, 1299 media_codec->media_codec_information); 1300 case AVDTP_CODEC_ATRAC_FAMILY: 1301 return avdtp_signaling_setup_media_codec_atrac_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, 1302 media_codec->media_codec_information); 1303 default: 1304 return avdtp_signaling_setup_media_codec_other_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, 1305 media_codec); 1306 } 1307 } 1308 1309 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, 1310 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 1311 1312 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 1313 uint16_t pos = 0; 1314 // assume MEDIA_CONFIG_OTHER_EVENT_LEN is larger than all other events 1315 uint8_t event[AVDTP_MEDIA_CONFIG_OTHER_EVENT_LEN]; 1316 pos = avdtp_setup_media_codec_config_event(event, sizeof(event), stream_endpoint, avdtp_cid, reconfigure, 1317 &configuration->media_codec); 1318 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1319 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1320 } 1321 } 1322 1323 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 1324 uint8_t event[14]; 1325 int pos = 0; 1326 event[pos++] = HCI_EVENT_AVDTP_META; 1327 event[pos++] = sizeof(event) - 2; 1328 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 1329 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1330 pos += 2; 1331 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 1332 pos += 6; 1333 event[pos++] = avdtp_local_seid(stream_endpoint); 1334 event[pos++] = avdtp_remote_seid(stream_endpoint); 1335 event[pos++] = status; 1336 1337 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1338 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1339 } 1340 1341 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 1342 uint8_t event[6]; 1343 int pos = 0; 1344 event[pos++] = HCI_EVENT_AVDTP_META; 1345 event[pos++] = sizeof(event) - 2; 1346 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 1347 little_endian_store_16(event, pos, avdtp_cid); 1348 pos += 2; 1349 event[pos++] = local_seid; 1350 1351 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1352 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1353 } 1354 1355 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 1356 uint8_t event[8]; 1357 int pos = 0; 1358 event[pos++] = HCI_EVENT_AVDTP_META; 1359 event[pos++] = sizeof(event) - 2; 1360 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 1361 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1362 pos += 2; 1363 event[pos++] = avdtp_local_seid(stream_endpoint); 1364 little_endian_store_16(event, pos, sequence_number); 1365 pos += 2; 1366 event[1] = pos - 2; 1367 1368 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1369 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 1370 } 1371 1372 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t *connection) { 1373 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1374 connection->wait_to_send_acceptor = true; 1375 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1376 return ERROR_CODE_SUCCESS; 1377 } 1378 1379 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t *connection) { 1380 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1381 connection->wait_to_send_initiator = true; 1382 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1383 return ERROR_CODE_SUCCESS; 1384 } 1385 1386 uint8_t avdtp_local_seid(const avdtp_stream_endpoint_t * stream_endpoint){ 1387 if (!stream_endpoint) return 0; 1388 return stream_endpoint->sep.seid; 1389 1390 } 1391 1392 uint8_t avdtp_remote_seid(const avdtp_stream_endpoint_t * stream_endpoint){ 1393 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1394 return stream_endpoint->remote_sep.seid; 1395 } 1396 1397 // helper to set/get configuration 1398 void avdtp_config_sbc_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz){ 1399 avdtp_sbc_sampling_frequency_t sampling_frequency; 1400 switch (sampling_frequency_hz){ 1401 case 16000: 1402 sampling_frequency = AVDTP_SBC_16000; 1403 break; 1404 case 32000: 1405 sampling_frequency = AVDTP_SBC_32000; 1406 break; 1407 case 48000: 1408 sampling_frequency = AVDTP_SBC_48000; 1409 break; 1410 default: 1411 sampling_frequency = AVDTP_SBC_44100; 1412 break; 1413 } 1414 config[0] = (((uint8_t) sampling_frequency) << 4) | (config[0] & 0x0f); 1415 } 1416 1417 void avdtp_config_sbc_store(uint8_t * config, const avdtp_configuration_sbc_t * configuration){ 1418 avdtp_sbc_channel_mode_t sbc_channel_mode; 1419 switch (configuration->channel_mode){ 1420 case AVDTP_CHANNEL_MODE_MONO: 1421 sbc_channel_mode = AVDTP_SBC_MONO; 1422 break; 1423 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 1424 sbc_channel_mode = AVDTP_SBC_DUAL_CHANNEL; 1425 break; 1426 case AVDTP_CHANNEL_MODE_STEREO: 1427 sbc_channel_mode = AVDTP_SBC_STEREO; 1428 break; 1429 default: 1430 sbc_channel_mode = AVDTP_SBC_JOINT_STEREO; 1431 break; 1432 } 1433 config[0] = (uint8_t) sbc_channel_mode; 1434 config[1] = (configuration->block_length << 4) | (configuration->subbands << 2) | configuration->allocation_method; 1435 config[2] = configuration-> min_bitpool_value; 1436 config[3] = configuration->max_bitpool_value; 1437 avdtp_config_sbc_set_sampling_frequency(config, configuration->sampling_frequency); 1438 } 1439 1440 void avdtp_config_mpeg_audio_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 1441 uint8_t sampling_frequency_index = 0; 1442 switch (sampling_frequency_hz){ 1443 case 16000: 1444 sampling_frequency_index = 5; 1445 break; 1446 case 22040: 1447 sampling_frequency_index = 4; 1448 break; 1449 case 24000: 1450 sampling_frequency_index = 3; 1451 break; 1452 case 32000: 1453 sampling_frequency_index = 2; 1454 break; 1455 case 44100: 1456 sampling_frequency_index = 1; 1457 break; 1458 case 48000: 1459 sampling_frequency_index = 0; 1460 break; 1461 default: 1462 btstack_assert(false); 1463 break; 1464 } 1465 config[1] = (config[1] & 0xC0) | (1 << sampling_frequency_index); 1466 } 1467 1468 void avdtp_config_mpeg_audio_store(uint8_t * config, const avdtp_configuration_mpeg_audio_t * configuration){ 1469 1470 config[0] = (1 << (7 - (configuration->layer - AVDTP_MPEG_LAYER_1))) | ((configuration->crc & 0x01) << 4) | (1 << (configuration->channel_mode - AVDTP_CHANNEL_MODE_MONO)); 1471 config[1] = ((configuration->media_payload_format & 0x01) << 6) ; 1472 uint16_t bit_rate_mask = 1 << configuration->bit_rate_index; 1473 config[2] = ((configuration->vbr & 0x01) << 7) | ((bit_rate_mask >> 8) & 0x3f); 1474 config[3] = bit_rate_mask & 0xff; 1475 avdtp_config_mpeg_audio_set_sampling_frequency(config, configuration->sampling_frequency); 1476 } 1477 1478 1479 void avdtp_config_mpeg_aac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 1480 uint16_t sampling_frequency_bitmap = 0; 1481 uint8_t i; 1482 const uint32_t aac_sampling_frequency_table[] = { 1483 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 1484 }; 1485 for (i=0;i<12;i++){ 1486 if (sampling_frequency_hz == aac_sampling_frequency_table[i]){ 1487 sampling_frequency_bitmap = 1 << i; 1488 break; 1489 } 1490 } 1491 config[1] = sampling_frequency_bitmap >> 4; 1492 config[2] = ((sampling_frequency_bitmap & 0x0f) << 4) | (config[2] & 0x0f); 1493 } 1494 1495 void avdtp_config_mpeg_aac_store(uint8_t * config, const avdtp_configuration_mpeg_aac_t * configuration) { 1496 config[0] = 1 << (7 -(configuration->object_type - AVDTP_AAC_MPEG2_LC)); 1497 uint8_t channels_bitmap = 0; 1498 switch (configuration->channels){ 1499 case 1: 1500 channels_bitmap = 0x02; 1501 break; 1502 case 2: 1503 channels_bitmap = 0x01; 1504 break; 1505 default: 1506 break; 1507 } 1508 config[2] = channels_bitmap << 2; 1509 config[3] = ((configuration->vbr & 0x01) << 7) | ((configuration->bit_rate >> 16) & 0x7f); 1510 config[4] = (configuration->bit_rate >> 8) & 0xff; 1511 config[5] = configuration->bit_rate & 0xff; 1512 avdtp_config_mpeg_aac_set_sampling_frequency(config, configuration->sampling_frequency); 1513 } 1514 1515 void avdtp_config_atrac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 1516 uint8_t fs_bitmap = 0; 1517 switch (sampling_frequency_hz){ 1518 case 44100: 1519 fs_bitmap = 2; 1520 break; 1521 case 48000: 1522 fs_bitmap = 1; 1523 break; 1524 default: 1525 break; 1526 } 1527 config[1] = (fs_bitmap << 4) | (config[1] & 0x0F); 1528 } 1529 1530 void avdtp_config_atrac_store(uint8_t * config, const avdtp_configuration_atrac_t * configuration){ 1531 uint8_t channel_mode_bitmap = 0; 1532 switch (configuration->channel_mode){ 1533 case AVDTP_CHANNEL_MODE_MONO: 1534 channel_mode_bitmap = 4; 1535 break; 1536 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 1537 channel_mode_bitmap = 2; 1538 break; 1539 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 1540 channel_mode_bitmap = 1; 1541 break; 1542 default: 1543 break; 1544 } 1545 config[0] = ((configuration->version - AVDTP_ATRAC_VERSION_1 + 1) << 5) | (channel_mode_bitmap << 2); 1546 uint32_t bit_rate_bitmap = 1 << (0x18 - configuration->bit_rate_index); 1547 config[1] = ((configuration->vbr & 0x01) << 3) | ((bit_rate_bitmap >> 16) & 0x07); 1548 config[2] = (bit_rate_bitmap >> 8) & 0xff; 1549 config[3] = bit_rate_bitmap & 0xff; 1550 config[4] = configuration->maximum_sul >> 8; 1551 config[5] = configuration->maximum_sul & 0xff; 1552 config[6] = 0; 1553 avdtp_config_atrac_set_sampling_frequency(config, configuration->sampling_frequency); 1554 } 1555