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 * avdtp.h 40 * 41 * Audio/Video Distribution Transport Protocol 42 * 43 * This protocol defines A/V stream negotiation, establishment, and transmission 44 * procedures. Also specified are the message formats that are exchanged between 45 * such devices to transport their A/V streams in A/V distribution applications. 46 * 47 * Media packets are unidirectional, they travel downstream from AVDTP Source to AVDTP Sink. 48 */ 49 50 #ifndef AVDTP_H 51 #define AVDTP_H 52 53 #include <stdint.h> 54 #include "hci.h" 55 #include "btstack_ring_buffer.h" 56 57 #if defined __cplusplus 58 extern "C" { 59 #endif 60 61 #define AVDTP_MAX_NUM_SEPS 10 62 #define AVDTP_MAX_CSRC_NUM 15 63 #define AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN 10 64 65 // Supported Features 66 #define AVDTP_SOURCE_FEATURE_MASK_PLAYER 0x0001u 67 #define AVDTP_SOURCE_FEATURE_MASK_MICROPHONE 0x0002u 68 #define AVDTP_SOURCE_FEATURE_MASK_TUNER 0x0004u 69 #define AVDTP_SOURCE_FEATURE_MASK_MIXER 0x0008u 70 71 #define AVDTP_SINK_FEATURE_MASK_HEADPHONE 0x0001u 72 #define AVDTP_SINK_FEATURE_MASK_SPEAKER 0x0002u 73 #define AVDTP_SINK_FEATURE_MASK_RECORDER 0x0004u 74 #define AVDTP_SINK_FEATURE_MASK_AMPLIFIER 0x0008u 75 76 // ACP to INT, Signal Response Header Error Codes 77 #define AVDTP_ERROR_CODE_BAD_HEADER_FORMAT 0x01 78 79 // ACP to INT, Signal Response Payload Format Error Codes 80 #define AVDTP_ERROR_CODE_BAD_LENGTH 0x11 81 #define AVDTP_ERROR_CODE_BAD_ACP_SEID 0x12 82 #define AVDTP_ERROR_CODE_SEP_IN_USE 0x13 83 #define AVDTP_ERROR_CODE_SEP_NOT_IN_USE 0x14 84 #define AVDTP_ERROR_CODE_BAD_SERV_CATEGORY 0x17 85 #define AVDTP_ERROR_CODE_BAD_PAYLOAD_FORMAT 0x18 86 #define AVDTP_ERROR_CODE_NOT_SUPPORTED_COMMAND 0x19 87 #define AVDTP_ERROR_CODE_INVALID_CAPABILITIES 0x1A 88 89 // ACP to INT, Signal Response Transport Service Capabilities Error Codes 90 #define AVDTP_ERROR_CODE_BAD_RECOVERY_TYPE 0x22 91 #define AVDTP_ERROR_CODE_BAD_MEDIA_TRANSPORT_FORMAT 0x23 92 #define AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT 0x25 93 #define AVDTP_ERROR_CODE_BAD_ROHC_FORMAT 0x26 94 #define AVDTP_ERROR_CODE_BAD_CP_FORMAT 0x27 95 #define AVDTP_ERROR_CODE_BAD_MULTIPLEXING_FORMAT 0x28 96 #define AVDTP_ERROR_CODE_UNSUPPORTED_CONFIGURATION 0x29 97 98 // ACP to INT, Procedure Error Codes 99 #define AVDTP_ERROR_CODE_BAD_STATE 0x31 100 101 // Internal Error Codes 102 #define AVDTP_INVALID_SEP_SEID 0xFF 103 104 105 // Signal Identifier fields 106 typedef enum { 107 AVDTP_SI_NONE = 0x00, 108 AVDTP_SI_DISCOVER = 0x01, 109 AVDTP_SI_GET_CAPABILITIES, 110 AVDTP_SI_SET_CONFIGURATION, 111 AVDTP_SI_GET_CONFIGURATION, 112 AVDTP_SI_RECONFIGURE, //5 113 AVDTP_SI_OPEN, //6 114 AVDTP_SI_START, //7 115 AVDTP_SI_CLOSE, 116 AVDTP_SI_SUSPEND, 117 AVDTP_SI_ABORT, //10 118 AVDTP_SI_SECURITY_CONTROL, 119 AVDTP_SI_GET_ALL_CAPABILITIES, //12 120 AVDTP_SI_DELAYREPORT 121 } avdtp_signal_identifier_t; 122 123 typedef enum { 124 AVDTP_SINGLE_PACKET = 0, 125 AVDTP_START_PACKET , 126 AVDTP_CONTINUE_PACKET , 127 AVDTP_END_PACKET 128 } avdtp_packet_type_t; 129 130 typedef enum { 131 AVDTP_CMD_MSG = 0, 132 AVDTP_GENERAL_REJECT_MSG , 133 AVDTP_RESPONSE_ACCEPT_MSG , 134 AVDTP_RESPONSE_REJECT_MSG 135 } avdtp_message_type_t; 136 137 typedef enum { 138 AVDTP_AUDIO = 0, 139 AVDTP_VIDEO, 140 AVDTP_MULTIMEDIA 141 } avdtp_media_type_t; 142 143 typedef enum { 144 AVDTP_CODEC_SBC = 0x00, 145 AVDTP_CODEC_MPEG_1_2_AUDIO = 0x01, 146 AVDTP_CODEC_MPEG_2_4_AAC = 0x02, 147 AVDTP_CODEC_ATRAC_FAMILY = 0x04, 148 AVDTP_CODEC_NON_A2DP = 0xFF 149 } avdtp_media_codec_type_t; 150 151 typedef enum { 152 AVDTP_CONTENT_PROTECTION_DTCP = 0x0001, 153 AVDTP_CONTENT_PROTECTION_SCMS_T = 0x0002 154 } avdtp_content_protection_type_t; 155 156 typedef enum { 157 AVDTP_SOURCE = 0, 158 AVDTP_SINK 159 } avdtp_sep_type_t; 160 161 typedef enum { 162 AVDTP_ROLE_SOURCE = 0, 163 AVDTP_ROLE_SINK 164 } avdtp_role_t; 165 166 typedef enum { 167 AVDTP_SERVICE_CATEGORY_INVALID_0 = 0x00, 168 AVDTP_MEDIA_TRANSPORT = 0X01, 169 AVDTP_REPORTING, 170 AVDTP_RECOVERY, 171 AVDTP_CONTENT_PROTECTION, //4 172 AVDTP_HEADER_COMPRESSION, //5 173 AVDTP_MULTIPLEXING, //6 174 AVDTP_MEDIA_CODEC, //7 175 AVDTP_DELAY_REPORTING, //8 176 AVDTP_SERVICE_CATEGORY_INVALID_FF = 0xFF 177 } avdtp_service_category_t; 178 179 typedef struct { 180 uint8_t recovery_type; // 0x01 = RFC2733 181 uint8_t maximum_recovery_window_size; // 0x01 to 0x18, for a Transport Packet 182 uint8_t maximum_number_media_packets; // 0x01 to 0x18, The maximum number of media packets a specific parity code covers 183 } avdtp_recovery_capabilities_t; 184 185 typedef struct { 186 avdtp_media_type_t media_type; 187 avdtp_media_codec_type_t media_codec_type; 188 uint16_t media_codec_information_len; 189 uint8_t * media_codec_information; 190 } adtvp_media_codec_capabilities_t; 191 192 193 typedef struct { 194 uint16_t cp_type; 195 uint16_t cp_type_value_len; 196 uint8_t cp_type_value[AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN]; 197 } adtvp_content_protection_t; 198 199 typedef struct{ 200 uint8_t back_ch; // byte0 - bit 8; 0=Not Available/Not Used; 1=Available/In Use 201 uint8_t media; // byte0 - bit 7 202 uint8_t recovery; // byte0 - bit 6 203 } avdtp_header_compression_capabilities_t; 204 205 typedef struct{ 206 uint8_t fragmentation; // byte0 - bit 8, Allow Adaptation Layer Fragmentation, 0 no, 1 yes 207 // Request/indicate value of the Transport Session Identifier for a media, reporting, or recovery transport sessions, respectively 208 uint8_t transport_identifiers_num; 209 uint8_t transport_session_identifiers[3]; // byte1, upper 5bits, 0x01 to 0x1E 210 // Request/indicate value for TCID for a media, reporting, or transport session 211 uint8_t tcid[3]; // byte2 0x01 to 0x1E 212 } avdtp_multiplexing_mode_capabilities_t; 213 214 typedef struct{ 215 avdtp_recovery_capabilities_t recovery; 216 adtvp_media_codec_capabilities_t media_codec; 217 adtvp_content_protection_t content_protection; 218 avdtp_header_compression_capabilities_t header_compression; 219 avdtp_multiplexing_mode_capabilities_t multiplexing_mode; 220 } avdtp_capabilities_t; 221 222 typedef enum{ 223 AVDTP_SBC_48000 = 1, 224 AVDTP_SBC_44100 = 2, 225 AVDTP_SBC_32000 = 4, 226 AVDTP_SBC_16000 = 8 227 } avdtp_sbc_sampling_frequency_t; 228 229 typedef enum{ 230 AVDTP_SBC_JOINT_STEREO = 1, 231 AVDTP_SBC_STEREO = 2, 232 AVDTP_SBC_DUAL_CHANNEL = 4, 233 AVDTP_SBC_MONO = 8 234 } avdtp_sbc_channel_mode_t; 235 236 typedef enum{ 237 AVDTP_SBC_BLOCK_LENGTH_16 = 1, 238 AVDTP_SBC_BLOCK_LENGTH_12 = 2, 239 AVDTP_SBC_BLOCK_LENGTH_8 = 4, 240 AVDTP_SBC_BLOCK_LENGTH_4 = 8 241 } avdtp_sbc_block_length_t; 242 243 typedef enum{ 244 AVDTP_SBC_SUBBANDS_8 = 1, 245 AVDTP_SBC_SUBBANDS_4 = 2 246 } avdtp_sbc_subbands_t; 247 248 typedef enum{ 249 AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS = 1, 250 AVDTP_SBC_ALLOCATION_METHOD_SNR = 2 251 } avdtp_sbc_allocation_method_t; 252 253 typedef struct { 254 uint8_t fragmentation; 255 uint8_t starting_packet; // of fragmented SBC frame 256 uint8_t last_packet; // of fragmented SBC frame 257 uint8_t num_frames; 258 } avdtp_sbc_codec_header_t; 259 260 typedef enum { 261 AVDTP_MPEG_LAYER_1 = 1, 262 AVDTP_MPEG_LAYER_2, 263 AVDTP_MPEG_LAYER_3, 264 } avdtp_mpeg_layer_t; 265 266 267 typedef enum { 268 AVDTP_AAC_MPEG2_LC = 1, 269 AVDTP_AAC_MPEG4_LC, 270 AVDTP_AAC_MPEG4_LTP, 271 AVDTP_AAC_MPEG4_SCALABLE 272 } avdtp_aac_object_type_t; 273 274 typedef enum { 275 AVDTP_ATRAC_VERSION_1 = 1, 276 AVDTP_ATRAC_VERSION_2, 277 AVDTP_ATRAC_VERSION_3 278 } avdtp_atrac_version_t; 279 280 // used for MPEG1/2 Audio, ATRAC (no stereo mode) 281 typedef enum { 282 AVDTP_CHANNEL_MODE_MONO = 1, 283 AVDTP_CHANNEL_MODE_DUAL_CHANNEL, 284 AVDTP_CHANNEL_MODE_STEREO, 285 AVDTP_CHANNEL_MODE_JOINT_STEREO, 286 } avdtp_channel_mode_t; 287 288 typedef struct { 289 uint16_t sampling_frequency; 290 avdtp_channel_mode_t channel_mode; 291 uint8_t block_length; 292 uint8_t subbands; 293 avdtp_sbc_allocation_method_t allocation_method; 294 uint8_t min_bitpool_value; 295 uint8_t max_bitpool_value; 296 } avdtp_configuration_sbc_t; 297 298 typedef struct { 299 avdtp_mpeg_layer_t layer; 300 uint8_t crc; 301 avdtp_channel_mode_t channel_mode; 302 uint8_t media_payload_format; 303 uint16_t sampling_frequency; 304 uint8_t vbr; 305 uint8_t bit_rate_index; 306 } avdtp_configuration_mpeg_audio_t; 307 308 typedef struct { 309 avdtp_aac_object_type_t object_type; 310 uint32_t sampling_frequency; 311 uint8_t channels; 312 uint32_t bit_rate; 313 uint8_t vbr; 314 } avdtp_configuration_mpeg_aac_t; 315 316 typedef struct { 317 avdtp_atrac_version_t version; 318 avdtp_channel_mode_t channel_mode; 319 uint16_t sampling_frequency; 320 uint8_t vbr; 321 uint8_t bit_rate_index; 322 uint16_t maximum_sul; 323 } avdtp_configuration_atrac_t; 324 325 326 327 typedef struct { 328 uint8_t version; 329 uint8_t padding; 330 uint8_t extension; 331 uint8_t csrc_count; 332 uint8_t marker; 333 uint8_t payload_type; 334 335 uint16_t sequence_number; 336 uint32_t timestamp; 337 uint32_t synchronization_source; 338 339 uint32_t csrc_list[AVDTP_MAX_CSRC_NUM]; 340 } avdtp_media_packet_header_t; 341 342 typedef enum { 343 AVDTP_BASIC_SERVICE_MODE = 0, 344 AVDTP_MULTIPLEXING_SERVICE_MODE 345 } avdtp_service_mode_t; 346 347 typedef enum { 348 AVDTP_STREAM_ENDPOINT_IDLE = 0, 349 AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE, 350 AVDTP_STREAM_ENDPOINT_CONFIGURED, 351 352 AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM, 353 AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM, 354 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED, 355 356 AVDTP_STREAM_ENDPOINT_OPENED, 357 AVDTP_STREAM_ENDPOINT_STREAMING, 358 359 AVDTP_STREAM_ENDPOINT_CLOSING, 360 AVDTP_STREAM_ENDPOINT_ABORTING, 361 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED 362 } avdtp_stream_endpoint_state_t; 363 364 typedef enum { 365 AVDTP_INITIATOR_STREAM_CONFIG_IDLE = 0, 366 AVDTP_INITIATOR_W2_SET_CONFIGURATION, 367 AVDTP_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID, 368 AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID, 369 370 AVDTP_INITIATOR_W2_OPEN_STREAM, 371 372 AVDTP_INITIATOR_W2_STREAMING_ABORT, 373 AVDTP_INITIATOR_FRAGMENTATED_COMMAND, 374 AVDTP_INITIATOR_W4_ANSWER 375 } avdtp_initiator_stream_endpoint_state_t; 376 377 typedef enum { 378 AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE = 0, 379 AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES, 380 AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES, 381 AVDTP_ACCEPTOR_W2_ANSWER_DELAY_REPORT, 382 AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION, 383 AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE, 384 AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION, 385 AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM, 386 AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM, 387 AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM, 388 AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM, 389 AVDTP_ACCEPTOR_W2_SUSPEND_STREAM_WITH_SEID, 390 AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM, 391 AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 392 AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 393 AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD, 394 AVDTP_ACCEPTOR_STREAMING 395 } avdtp_acceptor_stream_endpoint_state_t; 396 397 typedef struct { 398 uint8_t seid; // 0x01 – 0x3E, 6bit 399 uint8_t in_use; // 1 bit, 0 - not in use, 1 - in use 400 avdtp_media_type_t media_type; // 4 bit 401 avdtp_sep_type_t type; // 1 bit, 0 - SRC, 1 - SNK 402 403 uint16_t registered_service_categories; 404 avdtp_capabilities_t capabilities; 405 406 uint16_t configured_service_categories; 407 avdtp_capabilities_t configuration; 408 } avdtp_sep_t; 409 410 411 typedef enum { 412 AVDTP_SIGNALING_CONNECTION_IDLE = 0, 413 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK, 414 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE, 415 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE, 416 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE, 417 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED, 418 AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY, 419 AVDTP_SIGNALING_CONNECTION_OPENED, 420 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED 421 } avdtp_connection_state_t; 422 423 typedef enum { 424 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE = 0, 425 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS, 426 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 427 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 428 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE 429 } avdtp_acceptor_connection_state_t; 430 431 typedef enum { 432 AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE = 0, 433 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS, 434 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES, 435 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES, 436 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES, 437 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES, 438 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION, 439 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT, 440 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER 441 } avdtp_initiator_connection_state_t; 442 443 typedef struct { 444 uint8_t command[200]; 445 uint16_t size; 446 uint16_t offset; 447 uint8_t acp_seid; 448 uint8_t int_seid; 449 uint16_t transaction_label; 450 uint16_t num_packets; 451 avdtp_signal_identifier_t signal_identifier; 452 avdtp_message_type_t message_type; 453 avdtp_packet_type_t packet_type; 454 } avdtp_signaling_packet_t; 455 456 typedef enum { 457 AVDTP_CONFIGURATION_STATE_IDLE = 0, 458 AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED, 459 AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED, 460 AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED, 461 AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED, 462 } avtdp_configuration_state_t; 463 464 typedef enum { 465 A2DP_IDLE = 0, 466 A2DP_W4_CONNECTED, 467 A2DP_CONNECTED, 468 A2DP_DISCOVER_SEPS, 469 A2DP_GET_CAPABILITIES, 470 A2DP_W2_GET_ALL_CAPABILITIES, //5 471 A2DP_DISCOVERY_DONE, 472 A2DP_SET_CONFIGURATION, 473 A2DP_W4_GET_CONFIGURATION, 474 A2DP_W4_SET_CONFIGURATION, 475 A2DP_CONFIGURED, 476 A2DP_W2_SUSPEND_STREAM_WITH_SEID, //10 477 A2DP_W2_RECONFIGURE_WITH_SEID, 478 A2DP_W2_OPEN_STREAM_WITH_SEID, 479 A2DP_W4_OPEN_STREAM_WITH_SEID, 480 A2DP_W2_START_STREAM_WITH_SEID, 481 A2DP_W2_ABORT_STREAM_WITH_SEID, //15 482 A2DP_W2_STOP_STREAM_WITH_SEID, 483 A2DP_STREAMING_OPENED 484 } a2dp_state_t; 485 486 487 typedef struct { 488 btstack_linked_item_t item; 489 bd_addr_t remote_addr; 490 491 uint16_t avdtp_cid; 492 hci_con_handle_t con_handle; 493 494 // SDP results 495 uint16_t avdtp_l2cap_psm; 496 uint16_t avdtp_version; 497 bool sink_supported; 498 bool source_supported; 499 500 uint16_t l2cap_signaling_cid; 501 uint16_t l2cap_mtu; 502 503 avdtp_connection_state_t state; 504 avdtp_acceptor_connection_state_t acceptor_connection_state; 505 avdtp_initiator_connection_state_t initiator_connection_state; 506 507 // used to reassemble fragmented commands 508 avdtp_signaling_packet_t acceptor_signaling_packet; 509 510 // used to prepare outgoing signaling packets 511 avdtp_signaling_packet_t initiator_signaling_packet; 512 513 uint8_t initiator_local_seid; 514 uint8_t initiator_remote_seid; 515 516 uint8_t acceptor_local_seid; 517 518 uint16_t delay_ms; 519 520 // for repeating the set_configuration 521 void * active_stream_endpoint; 522 523 uint8_t initiator_transaction_label; 524 uint8_t acceptor_transaction_label; 525 bool wait_to_send_acceptor; 526 bool wait_to_send_initiator; 527 528 uint8_t suspended_seids[AVDTP_MAX_NUM_SEPS]; 529 uint8_t num_suspended_seids; 530 531 uint8_t reject_service_category; 532 avdtp_signal_identifier_t reject_signal_identifier; 533 uint8_t error_code; 534 535 // configuration state machine 536 avtdp_configuration_state_t configuration_state; 537 // btstack_timer_source_t configuration_timer; 538 539 bool incoming_declined; 540 btstack_timer_source_t retry_timer; 541 542 bool a2dp_source_discover_seps; 543 bool a2dp_source_outgoing_active; 544 bool a2dp_source_have_config; 545 bool a2dp_source_stream_endpoint_configured; 546 a2dp_state_t a2dp_source_state; 547 548 } avdtp_connection_t; 549 550 551 typedef struct avdtp_stream_endpoint { 552 btstack_linked_item_t item; 553 554 // original capabilities configured via avdtp_register_x_category 555 avdtp_sep_t sep; 556 557 // media codec configuration - provided by user 558 uint16_t media_codec_configuration_len; 559 uint8_t * media_codec_configuration_info; 560 561 avdtp_sep_t remote_sep; 562 hci_con_handle_t media_con_handle; 563 uint16_t l2cap_media_cid; 564 uint16_t l2cap_reporting_cid; 565 uint16_t l2cap_recovery_cid; 566 567 avdtp_stream_endpoint_state_t state; 568 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state; 569 avdtp_initiator_stream_endpoint_state_t initiator_config_state; 570 a2dp_state_t a2dp_state; 571 // active connection 572 avdtp_connection_t * connection; 573 574 // currently active remote seid 575 avdtp_capabilities_t remote_capabilities; 576 uint16_t remote_capabilities_bitmap; 577 578 uint16_t remote_configuration_bitmap; 579 avdtp_capabilities_t remote_configuration; 580 581 // temporary codec config used by A2DP Source 582 uint8_t set_config_remote_seid; 583 avdtp_media_codec_type_t media_codec_type; 584 uint8_t media_codec_info[8]; 585 586 // preferred SBC codec settings 587 uint32_t preferred_sampling_frequency; 588 uint8_t preferred_channel_mode; 589 590 // register request for media L2cap connection release 591 uint8_t media_disconnect; 592 uint8_t media_connect; 593 uint8_t start_stream; 594 uint8_t close_stream; 595 uint8_t request_can_send_now; 596 uint8_t abort_stream; 597 uint8_t suspend_stream; 598 uint16_t sequence_number; 599 } avdtp_stream_endpoint_t; 600 601 void avdtp_init(void); 602 void avdtp_deinit(void); 603 604 avdtp_connection_t * avdtp_get_connection_for_bd_addr(bd_addr_t addr); 605 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid); 606 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid); 607 btstack_linked_list_t * avdtp_get_connections(void); 608 btstack_linked_list_t * avdtp_get_stream_endpoints(void); 609 610 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid); 611 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec(avdtp_media_codec_type_t codec_type); 612 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_other(uint32_t vendor_id, uint16_t codec_id); 613 614 btstack_packet_handler_t avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint); 615 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size); 616 void avdtp_emit_source(uint8_t * packet, uint16_t size); 617 618 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint); 619 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 620 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 621 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets); 622 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); 623 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery); 624 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); 625 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation); 626 627 // sink only 628 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)); 629 630 /** 631 * @brief Register media configuration validator. Can reject insuitable configuration or report stream endpoint as currently busy 632 * @note validator has to return AVDTP error codes like: AVDTP_ERROR_CODE_SEP_IN_USE or AVDTP_ERROR_CODE_UNSUPPORTED_CONFIGURATION 633 * @param callback 634 */ 635 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)); 636 637 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 638 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type); 639 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint); 640 641 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid); 642 uint8_t avdtp_disconnect(uint16_t avdtp_cid); 643 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback); 644 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback); 645 646 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid); 647 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid); 648 uint8_t avdtp_stop_stream (uint16_t avdtp_cid, uint8_t local_seid); 649 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid); 650 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid); 651 652 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid); 653 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 654 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 655 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid); 656 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); 657 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); 658 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); 659 660 // frequency will be used by avdtp_choose_sbc_sampling_frequency (if supported by both endpoints) 661 void avdtp_set_preferred_sampling_frequeny(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 662 663 // channel_mode will be used by avdtp_choose_sbc_channel_mode (if supported by both endpoints) 664 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode); 665 666 void avdtp_set_preferred_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 667 668 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap); 669 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap); 670 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap); 671 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap); 672 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap); 673 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value); 674 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value); 675 676 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint); 677 678 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint); 679 680 uint16_t avdtp_get_next_transaction_label(void); 681 682 #if defined __cplusplus 683 } 684 #endif 685 686 #endif // AVDTP_H 687