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