1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /** 39 * Audio/Video Distribution Transport Protocol (AVDTP) 40 * 41 * This protocol defines A/V stream negotiation, establishment, and transmission 42 * procedures. Also specified are the message formats that are exchanged between 43 * such devices to transport their A/V streams in A/V distribution applications. 44 * 45 * Media packets are unidirectional, they travel downstream from AVDTP Source to AVDTP Sink. 46 */ 47 48 #ifndef AVDTP_H 49 #define AVDTP_H 50 51 #include <stdint.h> 52 #include "hci.h" 53 #include "btstack_ring_buffer.h" 54 55 #if defined __cplusplus 56 extern "C" { 57 #endif 58 59 #define AVDTP_MAX_NUM_SEPS 10 60 #define AVDTP_MAX_CSRC_NUM 15 61 #define AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN 10 62 63 // Supported Features 64 #define AVDTP_SOURCE_FEATURE_MASK_PLAYER 0x0001u 65 #define AVDTP_SOURCE_FEATURE_MASK_MICROPHONE 0x0002u 66 #define AVDTP_SOURCE_FEATURE_MASK_TUNER 0x0004u 67 #define AVDTP_SOURCE_FEATURE_MASK_MIXER 0x0008u 68 69 #define AVDTP_SINK_FEATURE_MASK_HEADPHONE 0x0001u 70 #define AVDTP_SINK_FEATURE_MASK_SPEAKER 0x0002u 71 #define AVDTP_SINK_FEATURE_MASK_RECORDER 0x0004u 72 #define AVDTP_SINK_FEATURE_MASK_AMPLIFIER 0x0008u 73 74 // ACP to INT, Signal Response Header Error Codes 75 #define AVDTP_ERROR_CODE_BAD_HEADER_FORMAT 0x01 76 77 // ACP to INT, Signal Response Payload Format Error Codes 78 #define AVDTP_ERROR_CODE_BAD_LENGTH 0x11 79 #define AVDTP_ERROR_CODE_BAD_ACP_SEID 0x12 80 #define AVDTP_ERROR_CODE_SEP_IN_USE 0x13 81 #define AVDTP_ERROR_CODE_SEP_NOT_IN_USE 0x14 82 #define AVDTP_ERROR_CODE_BAD_SERV_CATEGORY 0x17 83 #define AVDTP_ERROR_CODE_BAD_PAYLOAD_FORMAT 0x18 84 #define AVDTP_ERROR_CODE_NOT_SUPPORTED_COMMAND 0x19 85 #define AVDTP_ERROR_CODE_INVALID_CAPABILITIES 0x1A 86 87 // ACP to INT, Signal Response Transport Service Capabilities Error Codes 88 #define AVDTP_ERROR_CODE_BAD_RECOVERY_TYPE 0x22 89 #define AVDTP_ERROR_CODE_BAD_MEDIA_TRANSPORT_FORMAT 0x23 90 #define AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT 0x25 91 #define AVDTP_ERROR_CODE_BAD_ROHC_FORMAT 0x26 92 #define AVDTP_ERROR_CODE_BAD_CP_FORMAT 0x27 93 #define AVDTP_ERROR_CODE_BAD_MULTIPLEXING_FORMAT 0x28 94 #define AVDTP_ERROR_CODE_UNSUPPORTED_CONFIGURATION 0x29 95 96 // ACP to INT, Procedure Error Codes 97 #define AVDTP_ERROR_CODE_BAD_STATE 0x31 98 99 // Internal Error Codes 100 #define AVDTP_INVALID_SEP_SEID 0xFF 101 102 103 // Signal Identifier fields 104 typedef enum { 105 AVDTP_SI_NONE = 0x00, 106 AVDTP_SI_DISCOVER = 0x01, 107 AVDTP_SI_GET_CAPABILITIES, 108 AVDTP_SI_SET_CONFIGURATION, 109 AVDTP_SI_GET_CONFIGURATION, 110 AVDTP_SI_RECONFIGURE, //5 111 AVDTP_SI_OPEN, //6 112 AVDTP_SI_START, //7 113 AVDTP_SI_CLOSE, 114 AVDTP_SI_SUSPEND, 115 AVDTP_SI_ABORT, //10 116 AVDTP_SI_SECURITY_CONTROL, 117 AVDTP_SI_GET_ALL_CAPABILITIES, //12 118 AVDTP_SI_DELAYREPORT 119 } avdtp_signal_identifier_t; 120 121 typedef enum { 122 AVDTP_SINGLE_PACKET = 0, 123 AVDTP_START_PACKET , 124 AVDTP_CONTINUE_PACKET , 125 AVDTP_END_PACKET 126 } avdtp_packet_type_t; 127 128 typedef enum { 129 AVDTP_CMD_MSG = 0, 130 AVDTP_GENERAL_REJECT_MSG , 131 AVDTP_RESPONSE_ACCEPT_MSG , 132 AVDTP_RESPONSE_REJECT_MSG 133 } avdtp_message_type_t; 134 135 typedef enum { 136 AVDTP_AUDIO = 0, 137 AVDTP_VIDEO, 138 AVDTP_MULTIMEDIA 139 } avdtp_media_type_t; 140 141 typedef enum { 142 AVDTP_CODEC_SBC = 0x00, 143 AVDTP_CODEC_MPEG_1_2_AUDIO = 0x01, 144 AVDTP_CODEC_MPEG_2_4_AAC = 0x02, 145 AVDTP_CODEC_ATRAC_FAMILY = 0x04, 146 AVDTP_CODEC_NON_A2DP = 0xFF 147 } avdtp_media_codec_type_t; 148 149 typedef enum { 150 AVDTP_CONTENT_PROTECTION_DTCP = 0x0001, 151 AVDTP_CONTENT_PROTECTION_SCMS_T = 0x0002 152 } avdtp_content_protection_type_t; 153 154 typedef enum { 155 AVDTP_SOURCE = 0, 156 AVDTP_SINK 157 } avdtp_sep_type_t; 158 159 typedef enum { 160 AVDTP_ROLE_SOURCE = 0, 161 AVDTP_ROLE_SINK 162 } avdtp_role_t; 163 164 typedef enum { 165 AVDTP_SERVICE_CATEGORY_INVALID_0 = 0x00, 166 AVDTP_MEDIA_TRANSPORT = 0X01, 167 AVDTP_REPORTING, 168 AVDTP_RECOVERY, 169 AVDTP_CONTENT_PROTECTION, //4 170 AVDTP_HEADER_COMPRESSION, //5 171 AVDTP_MULTIPLEXING, //6 172 AVDTP_MEDIA_CODEC, //7 173 AVDTP_DELAY_REPORTING, //8 174 AVDTP_SERVICE_CATEGORY_INVALID_FF = 0xFF 175 } avdtp_service_category_t; 176 177 typedef struct { 178 uint8_t recovery_type; // 0x01 = RFC2733 179 uint8_t maximum_recovery_window_size; // 0x01 to 0x18, for a Transport Packet 180 uint8_t maximum_number_media_packets; // 0x01 to 0x18, The maximum number of media packets a specific parity code covers 181 } avdtp_recovery_capabilities_t; 182 183 typedef struct { 184 avdtp_media_type_t media_type; 185 avdtp_media_codec_type_t media_codec_type; 186 uint16_t media_codec_information_len; 187 uint8_t * media_codec_information; 188 } adtvp_media_codec_capabilities_t; 189 190 191 typedef struct { 192 uint16_t cp_type; 193 uint16_t cp_type_value_len; 194 uint8_t cp_type_value[AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN]; 195 } adtvp_content_protection_t; 196 197 typedef struct{ 198 uint8_t back_ch; // byte0 - bit 8; 0=Not Available/Not Used; 1=Available/In Use 199 uint8_t media; // byte0 - bit 7 200 uint8_t recovery; // byte0 - bit 6 201 } avdtp_header_compression_capabilities_t; 202 203 typedef struct{ 204 uint8_t fragmentation; // byte0 - bit 8, Allow Adaptation Layer Fragmentation, 0 no, 1 yes 205 // Request/indicate value of the Transport Session Identifier for a media, reporting, or recovery transport sessions, respectively 206 uint8_t transport_identifiers_num; 207 uint8_t transport_session_identifiers[3]; // byte1, upper 5bits, 0x01 to 0x1E 208 // Request/indicate value for TCID for a media, reporting, or transport session 209 uint8_t tcid[3]; // byte2 0x01 to 0x1E 210 } avdtp_multiplexing_mode_capabilities_t; 211 212 typedef struct{ 213 avdtp_recovery_capabilities_t recovery; 214 adtvp_media_codec_capabilities_t media_codec; 215 adtvp_content_protection_t content_protection; 216 avdtp_header_compression_capabilities_t header_compression; 217 avdtp_multiplexing_mode_capabilities_t multiplexing_mode; 218 } avdtp_capabilities_t; 219 220 typedef enum{ 221 AVDTP_SBC_48000 = 1, 222 AVDTP_SBC_44100 = 2, 223 AVDTP_SBC_32000 = 4, 224 AVDTP_SBC_16000 = 8 225 } avdtp_sbc_sampling_frequency_t; 226 227 typedef enum{ 228 AVDTP_SBC_JOINT_STEREO = 1, 229 AVDTP_SBC_STEREO = 2, 230 AVDTP_SBC_DUAL_CHANNEL = 4, 231 AVDTP_SBC_MONO = 8 232 } avdtp_sbc_channel_mode_t; 233 234 typedef enum{ 235 AVDTP_SBC_BLOCK_LENGTH_16 = 1, 236 AVDTP_SBC_BLOCK_LENGTH_12 = 2, 237 AVDTP_SBC_BLOCK_LENGTH_8 = 4, 238 AVDTP_SBC_BLOCK_LENGTH_4 = 8 239 } avdtp_sbc_block_length_t; 240 241 typedef enum{ 242 AVDTP_SBC_SUBBANDS_8 = 1, 243 AVDTP_SBC_SUBBANDS_4 = 2 244 } avdtp_sbc_subbands_t; 245 246 typedef enum{ 247 AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS = 1, 248 AVDTP_SBC_ALLOCATION_METHOD_SNR = 2 249 } avdtp_sbc_allocation_method_t; 250 251 typedef struct { 252 uint8_t fragmentation; 253 uint8_t starting_packet; // of fragmented SBC frame 254 uint8_t last_packet; // of fragmented SBC frame 255 uint8_t num_frames; 256 } avdtp_sbc_codec_header_t; 257 258 typedef enum { 259 AVDTP_MPEG_LAYER_1 = 1, 260 AVDTP_MPEG_LAYER_2, 261 AVDTP_MPEG_LAYER_3, 262 } avdtp_mpeg_layer_t; 263 264 265 typedef enum { 266 AVDTP_AAC_MPEG2_LC = 1, 267 AVDTP_AAC_MPEG4_LC, 268 AVDTP_AAC_MPEG4_LTP, 269 AVDTP_AAC_MPEG4_SCALABLE 270 } avdtp_aac_object_type_t; 271 272 typedef enum { 273 AVDTP_ATRAC_VERSION_1 = 1, 274 AVDTP_ATRAC_VERSION_2, 275 AVDTP_ATRAC_VERSION_3 276 } avdtp_atrac_version_t; 277 278 // used for MPEG1/2 Audio, ATRAC (no stereo mode) 279 typedef enum { 280 AVDTP_CHANNEL_MODE_MONO = 1, 281 AVDTP_CHANNEL_MODE_DUAL_CHANNEL, 282 AVDTP_CHANNEL_MODE_STEREO, 283 AVDTP_CHANNEL_MODE_JOINT_STEREO, 284 } avdtp_channel_mode_t; 285 286 typedef struct { 287 uint16_t sampling_frequency; 288 avdtp_channel_mode_t channel_mode; 289 uint8_t block_length; 290 uint8_t subbands; 291 avdtp_sbc_allocation_method_t allocation_method; 292 uint8_t min_bitpool_value; 293 uint8_t max_bitpool_value; 294 } avdtp_configuration_sbc_t; 295 296 typedef struct { 297 avdtp_mpeg_layer_t layer; 298 uint8_t crc; 299 avdtp_channel_mode_t channel_mode; 300 uint8_t media_payload_format; 301 uint16_t sampling_frequency; 302 uint8_t vbr; 303 uint8_t bit_rate_index; 304 } avdtp_configuration_mpeg_audio_t; 305 306 typedef struct { 307 avdtp_aac_object_type_t object_type; 308 uint32_t sampling_frequency; 309 uint8_t channels; 310 uint32_t bit_rate; 311 uint8_t vbr; 312 } avdtp_configuration_mpeg_aac_t; 313 314 typedef struct { 315 avdtp_atrac_version_t version; 316 avdtp_channel_mode_t channel_mode; 317 uint16_t sampling_frequency; 318 uint8_t vbr; 319 uint8_t bit_rate_index; 320 uint16_t maximum_sul; 321 } avdtp_configuration_atrac_t; 322 323 324 325 typedef struct { 326 uint8_t version; 327 uint8_t padding; 328 uint8_t extension; 329 uint8_t csrc_count; 330 uint8_t marker; 331 uint8_t payload_type; 332 333 uint16_t sequence_number; 334 uint32_t timestamp; 335 uint32_t synchronization_source; 336 337 uint32_t csrc_list[AVDTP_MAX_CSRC_NUM]; 338 } avdtp_media_packet_header_t; 339 340 typedef enum { 341 AVDTP_BASIC_SERVICE_MODE = 0, 342 AVDTP_MULTIPLEXING_SERVICE_MODE 343 } avdtp_service_mode_t; 344 345 typedef enum { 346 AVDTP_STREAM_ENDPOINT_IDLE = 0, 347 AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE, 348 AVDTP_STREAM_ENDPOINT_CONFIGURED, 349 350 AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM, 351 AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM, 352 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED, 353 354 AVDTP_STREAM_ENDPOINT_OPENED, 355 AVDTP_STREAM_ENDPOINT_STREAMING, 356 357 AVDTP_STREAM_ENDPOINT_CLOSING, 358 AVDTP_STREAM_ENDPOINT_ABORTING, 359 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED 360 } avdtp_stream_endpoint_state_t; 361 362 typedef enum { 363 AVDTP_INITIATOR_STREAM_CONFIG_IDLE = 0, 364 AVDTP_INITIATOR_W2_SET_CONFIGURATION, 365 AVDTP_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID, 366 AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID, 367 368 AVDTP_INITIATOR_W2_OPEN_STREAM, 369 370 AVDTP_INITIATOR_W2_STREAMING_ABORT, 371 AVDTP_INITIATOR_FRAGMENTATED_COMMAND, 372 AVDTP_INITIATOR_W4_ANSWER 373 } avdtp_initiator_stream_endpoint_state_t; 374 375 typedef enum { 376 AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE = 0, 377 AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES, 378 AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES, 379 AVDTP_ACCEPTOR_W2_ANSWER_DELAY_REPORT, 380 AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION, 381 AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE, 382 AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION, 383 AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM, 384 AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM, 385 AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM, 386 AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM, 387 AVDTP_ACCEPTOR_W2_SUSPEND_STREAM_WITH_SEID, 388 AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM, 389 AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 390 AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 391 AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD, 392 AVDTP_ACCEPTOR_STREAMING 393 } avdtp_acceptor_stream_endpoint_state_t; 394 395 typedef struct { 396 uint8_t seid; // 0x01 – 0x3E, 6bit 397 uint8_t in_use; // 1 bit, 0 - not in use, 1 - in use 398 avdtp_media_type_t media_type; // 4 bit 399 avdtp_sep_type_t type; // 1 bit, 0 - SRC, 1 - SNK 400 401 uint16_t registered_service_categories; 402 avdtp_capabilities_t capabilities; 403 404 uint16_t configured_service_categories; 405 avdtp_capabilities_t configuration; 406 } avdtp_sep_t; 407 408 409 typedef enum { 410 AVDTP_SIGNALING_CONNECTION_IDLE = 0, 411 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK, 412 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE, 413 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE, 414 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE, 415 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED, 416 AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY, 417 AVDTP_SIGNALING_CONNECTION_OPENED, 418 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED 419 } avdtp_connection_state_t; 420 421 typedef enum { 422 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE = 0, 423 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS, 424 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 425 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 426 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE 427 } avdtp_acceptor_connection_state_t; 428 429 typedef enum { 430 AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE = 0, 431 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS, 432 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES, 433 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES, 434 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES, 435 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES, 436 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION, 437 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT, 438 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER 439 } avdtp_initiator_connection_state_t; 440 441 typedef struct { 442 uint8_t command[200]; 443 uint16_t size; 444 uint16_t offset; 445 uint8_t acp_seid; 446 uint8_t int_seid; 447 uint16_t transaction_label; 448 uint16_t num_packets; 449 avdtp_signal_identifier_t signal_identifier; 450 avdtp_message_type_t message_type; 451 avdtp_packet_type_t packet_type; 452 } avdtp_signaling_packet_t; 453 454 typedef enum { 455 AVDTP_CONFIGURATION_STATE_IDLE = 0, 456 AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED, 457 AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED, 458 AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED, 459 AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED, 460 } avtdp_configuration_state_t; 461 462 typedef enum { 463 A2DP_IDLE = 0, 464 A2DP_W4_CONNECTED, 465 A2DP_CONNECTED, 466 A2DP_DISCOVER_SEPS, 467 A2DP_GET_CAPABILITIES, 468 A2DP_W2_GET_ALL_CAPABILITIES, //5 469 A2DP_DISCOVERY_DONE, 470 A2DP_SET_CONFIGURATION, 471 A2DP_W4_GET_CONFIGURATION, 472 A2DP_W4_SET_CONFIGURATION, 473 A2DP_CONFIGURED, 474 A2DP_W2_SUSPEND_STREAM_WITH_SEID, //10 475 A2DP_W2_RECONFIGURE_WITH_SEID, 476 A2DP_W2_OPEN_STREAM_WITH_SEID, 477 A2DP_W4_OPEN_STREAM_WITH_SEID, 478 A2DP_W2_START_STREAM_WITH_SEID, 479 A2DP_W2_ABORT_STREAM_WITH_SEID, //15 480 A2DP_W2_STOP_STREAM_WITH_SEID, 481 A2DP_STREAMING_OPENED 482 } a2dp_state_t; 483 484 485 typedef struct { 486 btstack_linked_item_t item; 487 bd_addr_t remote_addr; 488 489 uint16_t avdtp_cid; 490 hci_con_handle_t con_handle; 491 492 // SDP results 493 uint16_t avdtp_l2cap_psm; 494 uint16_t avdtp_version; 495 bool sink_supported; 496 bool source_supported; 497 498 uint16_t l2cap_signaling_cid; 499 uint16_t l2cap_mtu; 500 501 avdtp_connection_state_t state; 502 avdtp_acceptor_connection_state_t acceptor_connection_state; 503 avdtp_initiator_connection_state_t initiator_connection_state; 504 505 // used to reassemble fragmented commands 506 avdtp_signaling_packet_t acceptor_signaling_packet; 507 508 // used to prepare outgoing signaling packets 509 avdtp_signaling_packet_t initiator_signaling_packet; 510 511 uint8_t initiator_local_seid; 512 uint8_t initiator_remote_seid; 513 514 uint8_t acceptor_local_seid; 515 516 uint16_t delay_ms; 517 518 // for repeating the set_configuration 519 void * active_stream_endpoint; 520 521 uint8_t initiator_transaction_label; 522 uint8_t acceptor_transaction_label; 523 bool wait_to_send_acceptor; 524 bool wait_to_send_initiator; 525 526 uint8_t suspended_seids[AVDTP_MAX_NUM_SEPS]; 527 uint8_t num_suspended_seids; 528 529 uint8_t reject_service_category; 530 avdtp_signal_identifier_t reject_signal_identifier; 531 uint8_t error_code; 532 533 // configuration state machine 534 avtdp_configuration_state_t configuration_state; 535 536 bool incoming_declined; 537 btstack_timer_source_t retry_timer; 538 539 bool a2dp_source_discover_seps; 540 bool a2dp_source_outgoing_active; 541 bool a2dp_source_have_config; 542 bool a2dp_source_stream_endpoint_configured; 543 a2dp_state_t a2dp_source_state; 544 struct avdtp_stream_endpoint * a2dp_source_local_stream_endpoint; 545 546 } avdtp_connection_t; 547 548 549 typedef struct avdtp_stream_endpoint { 550 btstack_linked_item_t item; 551 552 // original capabilities configured via avdtp_register_x_category 553 avdtp_sep_t sep; 554 555 // media codec configuration - provided by user 556 uint16_t media_codec_configuration_len; 557 uint8_t * media_codec_configuration_info; 558 559 avdtp_sep_t remote_sep; 560 hci_con_handle_t media_con_handle; 561 uint16_t l2cap_media_cid; 562 uint16_t l2cap_reporting_cid; 563 uint16_t l2cap_recovery_cid; 564 565 avdtp_stream_endpoint_state_t state; 566 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state; 567 avdtp_initiator_stream_endpoint_state_t initiator_config_state; 568 a2dp_state_t a2dp_state; 569 // active connection 570 avdtp_connection_t * connection; 571 572 // currently active remote seid 573 avdtp_capabilities_t remote_capabilities; 574 uint16_t remote_capabilities_bitmap; 575 576 uint16_t remote_configuration_bitmap; 577 avdtp_capabilities_t remote_configuration; 578 579 // temporary codec config used by A2DP Source 580 uint8_t set_config_remote_seid; 581 avdtp_media_codec_type_t media_codec_type; 582 uint8_t media_codec_info[8]; 583 584 // preferred SBC codec settings 585 uint32_t preferred_sampling_frequency; 586 uint8_t preferred_channel_mode; 587 588 // register request for media L2cap connection release 589 uint8_t media_disconnect; 590 uint8_t media_connect; 591 uint8_t start_stream; 592 uint8_t close_stream; 593 bool request_can_send_now; 594 uint8_t abort_stream; 595 uint8_t suspend_stream; 596 uint16_t sequence_number; 597 } avdtp_stream_endpoint_t; 598 599 void avdtp_init(void); 600 void avdtp_deinit(void); 601 602 avdtp_connection_t * avdtp_get_connection_for_bd_addr(bd_addr_t addr); 603 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid); 604 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid); 605 btstack_linked_list_t * avdtp_get_connections(void); 606 btstack_linked_list_t * avdtp_get_stream_endpoints(void); 607 608 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid); 609 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec(avdtp_media_codec_type_t codec_type); 610 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_other(uint32_t vendor_id, uint16_t codec_id); 611 612 btstack_packet_handler_t avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint); 613 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size); 614 void avdtp_emit_source(uint8_t * packet, uint16_t size); 615 616 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint); 617 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 618 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 619 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets); 620 void avdtp_register_content_protection_category(avdtp_stream_endpoint_t * stream_endpoint, uint16_t cp_type, const uint8_t * cp_type_value, uint8_t cp_type_value_len); 621 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery); 622 void avdtp_register_media_codec_category(avdtp_stream_endpoint_t * stream_endpoint, avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, const uint8_t *media_codec_info, uint16_t media_codec_info_len); 623 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation); 624 625 // sink only 626 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)); 627 628 /** 629 * @brief Register media configuration validator. Can reject insuitable configuration or report stream endpoint as currently busy 630 * @note validator has to return AVDTP error codes like: AVDTP_ERROR_CODE_SEP_IN_USE or AVDTP_ERROR_CODE_UNSUPPORTED_CONFIGURATION 631 * @param callback 632 */ 633 void avdtp_register_media_config_validator(uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, avdtp_media_codec_type_t media_codec_type, const uint8_t * media_codec_info, uint16_t media_codec_info_len)); 634 635 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 636 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type); 637 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint); 638 639 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid); 640 uint8_t avdtp_disconnect(uint16_t avdtp_cid); 641 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback); 642 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback); 643 644 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid); 645 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid); 646 uint8_t avdtp_stop_stream (uint16_t avdtp_cid, uint8_t local_seid); 647 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid); 648 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid); 649 650 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid); 651 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 652 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 653 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid); 654 uint8_t avdtp_set_configuration(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration); 655 uint8_t avdtp_reconfigure(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration); 656 uint8_t avdtp_validate_media_configuration(const avdtp_stream_endpoint_t * stream_endpoint, avdtp_media_codec_type_t media_codec_type, const uint8_t * media_codec_info, uint16_t media_codec_info_len); 657 658 // frequency will be used by avdtp_choose_sbc_sampling_frequency (if supported by both endpoints) 659 void avdtp_set_preferred_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 660 661 // channel_mode will be used by avdtp_choose_sbc_channel_mode (if supported by both endpoints) 662 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode); 663 664 void avdtp_set_preferred_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 665 666 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap); 667 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap); 668 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap); 669 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap); 670 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap); 671 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value); 672 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value); 673 674 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint); 675 676 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint); 677 678 uint16_t avdtp_get_next_transaction_label(void); 679 680 #if defined __cplusplus 681 } 682 #endif 683 684 #endif // AVDTP_H 685