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 /** 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 // Limit L2CAP MTU to fit largest packet for BR/EDR 60 #define AVDTP_L2CAP_MTU (HCI_ACL_3DH5_SIZE - L2CAP_HEADER_SIZE) 61 62 #define AVDTP_MAX_NUM_SEPS 10 63 #define AVDTP_MAX_CSRC_NUM 15 64 #define AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN 10 65 66 // Supported Features 67 #define AVDTP_SOURCE_FEATURE_MASK_PLAYER 0x0001u 68 #define AVDTP_SOURCE_FEATURE_MASK_MICROPHONE 0x0002u 69 #define AVDTP_SOURCE_FEATURE_MASK_TUNER 0x0004u 70 #define AVDTP_SOURCE_FEATURE_MASK_MIXER 0x0008u 71 72 #define AVDTP_SINK_FEATURE_MASK_HEADPHONE 0x0001u 73 #define AVDTP_SINK_FEATURE_MASK_SPEAKER 0x0002u 74 #define AVDTP_SINK_FEATURE_MASK_RECORDER 0x0004u 75 #define AVDTP_SINK_FEATURE_MASK_AMPLIFIER 0x0008u 76 77 // ACP to INT, Signal Response Header Error Codes 78 #define AVDTP_ERROR_CODE_BAD_HEADER_FORMAT 0x01 79 80 // ACP to INT, Signal Response Payload Format Error Codes 81 #define AVDTP_ERROR_CODE_BAD_LENGTH 0x11 82 #define AVDTP_ERROR_CODE_BAD_ACP_SEID 0x12 83 #define AVDTP_ERROR_CODE_SEP_IN_USE 0x13 84 #define AVDTP_ERROR_CODE_SEP_NOT_IN_USE 0x14 85 #define AVDTP_ERROR_CODE_BAD_SERV_CATEGORY 0x17 86 #define AVDTP_ERROR_CODE_BAD_PAYLOAD_FORMAT 0x18 87 #define AVDTP_ERROR_CODE_NOT_SUPPORTED_COMMAND 0x19 88 #define AVDTP_ERROR_CODE_INVALID_CAPABILITIES 0x1A 89 90 // ACP to INT, Signal Response Transport Service Capabilities Error Codes 91 #define AVDTP_ERROR_CODE_BAD_RECOVERY_TYPE 0x22 92 #define AVDTP_ERROR_CODE_BAD_MEDIA_TRANSPORT_FORMAT 0x23 93 #define AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT 0x25 94 #define AVDTP_ERROR_CODE_BAD_ROHC_FORMAT 0x26 95 #define AVDTP_ERROR_CODE_BAD_CP_FORMAT 0x27 96 #define AVDTP_ERROR_CODE_BAD_MULTIPLEXING_FORMAT 0x28 97 #define AVDTP_ERROR_CODE_UNSUPPORTED_CONFIGURATION 0x29 98 99 // ACP to INT, Procedure Error Codes 100 #define AVDTP_ERROR_CODE_BAD_STATE 0x31 101 102 // Internal Error Codes 103 #define AVDTP_INVALID_SEP_SEID 0xFF 104 105 106 // Signal Identifier fields 107 typedef enum { 108 AVDTP_SI_NONE = 0x00, 109 AVDTP_SI_DISCOVER = 0x01, 110 AVDTP_SI_GET_CAPABILITIES, 111 AVDTP_SI_SET_CONFIGURATION, 112 AVDTP_SI_GET_CONFIGURATION, 113 AVDTP_SI_RECONFIGURE, //5 114 AVDTP_SI_OPEN, //6 115 AVDTP_SI_START, //7 116 AVDTP_SI_CLOSE, 117 AVDTP_SI_SUSPEND, 118 AVDTP_SI_ABORT, //10 119 AVDTP_SI_SECURITY_CONTROL, 120 AVDTP_SI_GET_ALL_CAPABILITIES, //12 121 AVDTP_SI_DELAYREPORT, 122 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 123 AVDTP_SI_ACCEPT_START 124 #endif 125 } avdtp_signal_identifier_t; 126 127 typedef enum { 128 AVDTP_SINGLE_PACKET = 0, 129 AVDTP_START_PACKET , 130 AVDTP_CONTINUE_PACKET , 131 AVDTP_END_PACKET 132 } avdtp_packet_type_t; 133 134 typedef enum { 135 AVDTP_CMD_MSG = 0, 136 AVDTP_GENERAL_REJECT_MSG , 137 AVDTP_RESPONSE_ACCEPT_MSG , 138 AVDTP_RESPONSE_REJECT_MSG 139 } avdtp_message_type_t; 140 141 typedef enum { 142 AVDTP_AUDIO = 0, 143 AVDTP_VIDEO, 144 AVDTP_MULTIMEDIA 145 } avdtp_media_type_t; 146 147 typedef enum { 148 AVDTP_CODEC_SBC = 0x00, 149 AVDTP_CODEC_MPEG_1_2_AUDIO = 0x01, 150 AVDTP_CODEC_MPEG_2_4_AAC = 0x02, 151 AVDTP_CODEC_ATRAC_FAMILY = 0x04, 152 AVDTP_CODEC_NON_A2DP = 0xFF 153 } avdtp_media_codec_type_t; 154 155 typedef enum { 156 AVDTP_CONTENT_PROTECTION_DTCP = 0x0001, 157 AVDTP_CONTENT_PROTECTION_SCMS_T = 0x0002 158 } avdtp_content_protection_type_t; 159 160 typedef enum { 161 AVDTP_SOURCE = 0, 162 AVDTP_SINK 163 } avdtp_sep_type_t; 164 165 typedef enum { 166 AVDTP_ROLE_SOURCE = 0, 167 AVDTP_ROLE_SINK 168 } avdtp_role_t; 169 170 typedef enum { 171 AVDTP_SERVICE_CATEGORY_INVALID_0 = 0x00, 172 AVDTP_MEDIA_TRANSPORT = 0X01, 173 AVDTP_REPORTING, 174 AVDTP_RECOVERY, 175 AVDTP_CONTENT_PROTECTION, //4 176 AVDTP_HEADER_COMPRESSION, //5 177 AVDTP_MULTIPLEXING, //6 178 AVDTP_MEDIA_CODEC, //7 179 AVDTP_DELAY_REPORTING, //8 180 AVDTP_SERVICE_CATEGORY_INVALID_FF = 0xFF 181 } avdtp_service_category_t; 182 183 typedef struct { 184 uint8_t recovery_type; // 0x01 = RFC2733 185 uint8_t maximum_recovery_window_size; // 0x01 to 0x18, for a Transport Packet 186 uint8_t maximum_number_media_packets; // 0x01 to 0x18, The maximum number of media packets a specific parity code covers 187 } avdtp_recovery_capabilities_t; 188 189 typedef struct { 190 avdtp_media_type_t media_type; 191 avdtp_media_codec_type_t media_codec_type; 192 uint16_t media_codec_information_len; 193 uint8_t * media_codec_information; 194 } adtvp_media_codec_capabilities_t; 195 196 197 typedef struct { 198 uint16_t cp_type; 199 uint16_t cp_type_value_len; 200 uint8_t cp_type_value[AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN]; 201 } adtvp_content_protection_t; 202 203 typedef struct{ 204 uint8_t back_ch; // byte0 - bit 8; 0=Not Available/Not Used; 1=Available/In Use 205 uint8_t media; // byte0 - bit 7 206 uint8_t recovery; // byte0 - bit 6 207 } avdtp_header_compression_capabilities_t; 208 209 typedef struct{ 210 uint8_t fragmentation; // byte0 - bit 8, Allow Adaptation Layer Fragmentation, 0 no, 1 yes 211 // Request/indicate value of the Transport Session Identifier for a media, reporting, or recovery transport sessions, respectively 212 uint8_t transport_identifiers_num; 213 uint8_t transport_session_identifiers[3]; // byte1, upper 5bits, 0x01 to 0x1E 214 // Request/indicate value for TCID for a media, reporting, or transport session 215 uint8_t tcid[3]; // byte2 0x01 to 0x1E 216 } avdtp_multiplexing_mode_capabilities_t; 217 218 typedef struct{ 219 avdtp_recovery_capabilities_t recovery; 220 adtvp_media_codec_capabilities_t media_codec; 221 adtvp_content_protection_t content_protection; 222 avdtp_header_compression_capabilities_t header_compression; 223 avdtp_multiplexing_mode_capabilities_t multiplexing_mode; 224 } avdtp_capabilities_t; 225 226 typedef enum{ 227 AVDTP_SBC_48000 = 1, 228 AVDTP_SBC_44100 = 2, 229 AVDTP_SBC_32000 = 4, 230 AVDTP_SBC_16000 = 8 231 } avdtp_sbc_sampling_frequency_t; 232 233 typedef enum{ 234 AVDTP_SBC_JOINT_STEREO = 1, 235 AVDTP_SBC_STEREO = 2, 236 AVDTP_SBC_DUAL_CHANNEL = 4, 237 AVDTP_SBC_MONO = 8 238 } avdtp_sbc_channel_mode_t; 239 240 typedef enum{ 241 AVDTP_SBC_BLOCK_LENGTH_16 = 1, 242 AVDTP_SBC_BLOCK_LENGTH_12 = 2, 243 AVDTP_SBC_BLOCK_LENGTH_8 = 4, 244 AVDTP_SBC_BLOCK_LENGTH_4 = 8 245 } avdtp_sbc_block_length_t; 246 247 typedef enum{ 248 AVDTP_SBC_SUBBANDS_8 = 1, 249 AVDTP_SBC_SUBBANDS_4 = 2 250 } avdtp_sbc_subbands_t; 251 252 typedef enum{ 253 AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS = 1, 254 AVDTP_SBC_ALLOCATION_METHOD_SNR = 2 255 } avdtp_sbc_allocation_method_t; 256 257 typedef struct { 258 uint8_t fragmentation; 259 uint8_t starting_packet; // of fragmented SBC frame 260 uint8_t last_packet; // of fragmented SBC frame 261 uint8_t num_frames; 262 } avdtp_sbc_codec_header_t; 263 264 typedef enum { 265 AVDTP_MPEG_LAYER_1 = 1, 266 AVDTP_MPEG_LAYER_2, 267 AVDTP_MPEG_LAYER_3, 268 } avdtp_mpeg_layer_t; 269 270 271 typedef enum { 272 AVDTP_AAC_MPEG2_LC = 1, 273 AVDTP_AAC_MPEG4_LC, 274 AVDTP_AAC_MPEG4_LTP, 275 AVDTP_AAC_MPEG4_SCALABLE 276 } avdtp_aac_object_type_t; 277 278 typedef enum { 279 AVDTP_ATRAC_VERSION_1 = 1, 280 AVDTP_ATRAC_VERSION_2, 281 AVDTP_ATRAC_VERSION_3 282 } avdtp_atrac_version_t; 283 284 // used for MPEG1/2 Audio, ATRAC (no stereo mode) 285 typedef enum { 286 AVDTP_CHANNEL_MODE_MONO = 1, 287 AVDTP_CHANNEL_MODE_DUAL_CHANNEL, 288 AVDTP_CHANNEL_MODE_STEREO, 289 AVDTP_CHANNEL_MODE_JOINT_STEREO, 290 } avdtp_channel_mode_t; 291 292 typedef struct { 293 uint16_t sampling_frequency; 294 avdtp_channel_mode_t channel_mode; 295 uint8_t block_length; 296 uint8_t subbands; 297 avdtp_sbc_allocation_method_t allocation_method; 298 uint8_t min_bitpool_value; 299 uint8_t max_bitpool_value; 300 } avdtp_configuration_sbc_t; 301 302 typedef struct { 303 avdtp_mpeg_layer_t layer; 304 uint8_t crc; 305 avdtp_channel_mode_t channel_mode; 306 uint8_t media_payload_format; 307 uint16_t sampling_frequency; 308 uint8_t vbr; 309 uint8_t bit_rate_index; 310 } avdtp_configuration_mpeg_audio_t; 311 312 typedef struct { 313 avdtp_aac_object_type_t object_type; 314 uint32_t sampling_frequency; 315 uint8_t channels; 316 uint32_t bit_rate; 317 uint8_t vbr; 318 } avdtp_configuration_mpeg_aac_t; 319 320 typedef struct { 321 avdtp_atrac_version_t version; 322 avdtp_channel_mode_t channel_mode; 323 uint16_t sampling_frequency; 324 uint8_t vbr; 325 uint8_t bit_rate_index; 326 uint16_t maximum_sul; 327 } avdtp_configuration_atrac_t; 328 329 330 331 typedef struct { 332 uint8_t version; 333 uint8_t padding; 334 uint8_t extension; 335 uint8_t csrc_count; 336 uint8_t marker; 337 uint8_t payload_type; 338 339 uint16_t sequence_number; 340 uint32_t timestamp; 341 uint32_t synchronization_source; 342 343 uint32_t csrc_list[AVDTP_MAX_CSRC_NUM]; 344 } avdtp_media_packet_header_t; 345 346 typedef enum { 347 AVDTP_BASIC_SERVICE_MODE = 0, 348 AVDTP_MULTIPLEXING_SERVICE_MODE 349 } avdtp_service_mode_t; 350 351 typedef enum { 352 AVDTP_STREAM_ENDPOINT_IDLE = 0, 353 AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE, 354 AVDTP_STREAM_ENDPOINT_CONFIGURED, 355 356 AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM, 357 AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM, 358 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED, 359 360 AVDTP_STREAM_ENDPOINT_OPENED, 361 AVDTP_STREAM_ENDPOINT_STREAMING, 362 363 AVDTP_STREAM_ENDPOINT_CLOSING, 364 AVDTP_STREAM_ENDPOINT_ABORTING, 365 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED 366 } avdtp_stream_endpoint_state_t; 367 368 typedef enum { 369 AVDTP_INITIATOR_STREAM_CONFIG_IDLE = 0, 370 AVDTP_INITIATOR_W2_SET_CONFIGURATION, 371 AVDTP_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID, 372 AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID, 373 374 AVDTP_INITIATOR_W2_OPEN_STREAM, 375 376 AVDTP_INITIATOR_W2_STREAMING_ABORT, 377 AVDTP_INITIATOR_FRAGMENTATED_COMMAND, 378 AVDTP_INITIATOR_W4_ANSWER 379 } avdtp_initiator_stream_endpoint_state_t; 380 381 typedef enum { 382 AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE = 0, 383 AVDTP_ACCEPTOR_W2_ACCEPT_GET_CAPABILITIES, 384 AVDTP_ACCEPTOR_W2_ACCEPT_GET_ALL_CAPABILITIES, 385 AVDTP_ACCEPTOR_W2_ACCEPT_DELAY_REPORT, 386 AVDTP_ACCEPTOR_W2_ACCEPT_SET_CONFIGURATION, 387 AVDTP_ACCEPTOR_W2_ACCEPT_RECONFIGURE, 388 AVDTP_ACCEPTOR_W2_ACCEPT_GET_CONFIGURATION, 389 AVDTP_ACCEPTOR_W2_ACCEPT_OPEN_STREAM, 390 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 391 AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM, 392 AVDTP_ACCEPTOR_W2_REJECT_START_STREAM, 393 #endif 394 AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM, 395 AVDTP_ACCEPTOR_W2_ACCEPT_CLOSE_STREAM, 396 AVDTP_ACCEPTOR_W2_ACCEPT_ABORT_STREAM, 397 AVDTP_ACCEPTOR_W2_ACCEPT_SUSPEND_STREAM, 398 AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 399 AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 400 AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD 401 } avdtp_acceptor_stream_endpoint_state_t; 402 403 typedef struct { 404 uint8_t seid; // 0x01 – 0x3E, 6bit 405 uint8_t in_use; // 1 bit, 0 - not in use, 1 - in use 406 avdtp_media_type_t media_type; // 4 bit 407 avdtp_sep_type_t type; // 1 bit, 0 - SRC, 1 - SNK 408 409 uint16_t registered_service_categories; 410 avdtp_capabilities_t capabilities; 411 412 uint16_t configured_service_categories; 413 avdtp_capabilities_t configuration; 414 } avdtp_sep_t; 415 416 417 typedef enum { 418 AVDTP_SIGNALING_CONNECTION_IDLE = 0, 419 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK, 420 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE, 421 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE, 422 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE, 423 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED, 424 AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY, 425 AVDTP_SIGNALING_CONNECTION_OPENED, 426 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED 427 } avdtp_connection_state_t; 428 429 typedef enum { 430 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE = 0, 431 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS, 432 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 433 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 434 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE 435 } avdtp_acceptor_connection_state_t; 436 437 typedef enum { 438 AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE = 0, 439 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS, 440 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SINK, 441 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SOURCE, 442 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES, 443 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES, 444 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES, 445 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION, 446 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT, 447 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER 448 } avdtp_initiator_connection_state_t; 449 450 typedef struct { 451 uint8_t command[200]; 452 uint16_t size; 453 uint16_t offset; 454 uint8_t acp_seid; 455 uint8_t int_seid; 456 uint8_t transaction_label; 457 uint16_t num_packets; 458 avdtp_signal_identifier_t signal_identifier; 459 avdtp_message_type_t message_type; 460 avdtp_packet_type_t packet_type; 461 } avdtp_signaling_packet_t; 462 463 typedef enum { 464 AVDTP_CONFIGURATION_STATE_IDLE = 0, 465 AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED, 466 AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED, 467 AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED, 468 AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED, 469 } avtdp_configuration_state_t; 470 471 typedef enum { 472 A2DP_IDLE = 0, 473 A2DP_W4_CONNECTED, 474 A2DP_CONNECTED, 475 A2DP_DISCOVER_SEPS, 476 A2DP_GET_CAPABILITIES, 477 A2DP_W2_GET_ALL_CAPABILITIES, //5 478 A2DP_DISCOVERY_DONE, 479 A2DP_SET_CONFIGURATION, 480 A2DP_W4_GET_CONFIGURATION, 481 A2DP_W4_SET_CONFIGURATION, 482 A2DP_CONFIGURED, 483 A2DP_W2_SUSPEND_STREAM_WITH_SEID, //10 484 A2DP_W2_RECONFIGURE_WITH_SEID, 485 A2DP_W2_OPEN_STREAM_WITH_SEID, 486 A2DP_W4_OPEN_STREAM_WITH_SEID, 487 A2DP_W2_START_STREAM_WITH_SEID, 488 A2DP_W2_ABORT_STREAM_WITH_SEID, //15 489 A2DP_W2_STOP_STREAM_WITH_SEID, 490 A2DP_STREAMING_OPENED 491 } a2dp_state_t; 492 493 typedef struct { 494 bool discover_seps; 495 bool outgoing_active; 496 bool have_config; 497 bool stream_endpoint_configured; 498 a2dp_state_t state; 499 struct avdtp_stream_endpoint * local_stream_endpoint; 500 } a2dp_config_process_t; 501 502 typedef struct { 503 btstack_linked_item_t item; 504 bd_addr_t remote_addr; 505 506 uint16_t avdtp_cid; 507 hci_con_handle_t con_handle; 508 509 // SDP results 510 uint16_t avdtp_l2cap_psm; 511 uint16_t avdtp_version; 512 bool sink_supported; 513 bool source_supported; 514 515 uint16_t l2cap_signaling_cid; 516 uint16_t l2cap_mtu; 517 518 avdtp_connection_state_t state; 519 avdtp_acceptor_connection_state_t acceptor_connection_state; 520 avdtp_initiator_connection_state_t initiator_connection_state; 521 522 // used to reassemble fragmented commands 523 avdtp_signaling_packet_t acceptor_signaling_packet; 524 525 // used to prepare outgoing signaling packets 526 avdtp_signaling_packet_t initiator_signaling_packet; 527 528 uint8_t initiator_local_seid; 529 uint8_t initiator_remote_seid; 530 531 uint8_t acceptor_local_seid; 532 533 uint16_t delay_ms; 534 535 // for repeating the set_configuration 536 void * active_stream_endpoint; 537 538 uint8_t initiator_transaction_label; 539 uint8_t acceptor_transaction_label; 540 bool wait_to_send_acceptor; 541 bool wait_to_send_initiator; 542 543 uint8_t suspended_seids[AVDTP_MAX_NUM_SEPS]; 544 uint8_t num_suspended_seids; 545 546 uint8_t reject_service_category; 547 avdtp_signal_identifier_t reject_signal_identifier; 548 uint8_t error_code; 549 550 // configuration state machine 551 avtdp_configuration_state_t configuration_state; 552 553 bool incoming_declined; 554 btstack_timer_source_t retry_timer; 555 556 // A2DP SOURCE 557 a2dp_config_process_t a2dp_source_config_process; 558 559 // A2DP SINK 560 a2dp_config_process_t a2dp_sink_config_process; 561 562 } avdtp_connection_t; 563 564 565 typedef struct avdtp_stream_endpoint { 566 btstack_linked_item_t item; 567 568 // original capabilities configured via avdtp_register_x_category 569 avdtp_sep_t sep; 570 571 // media codec configuration - provided by user 572 uint16_t media_codec_configuration_len; 573 uint8_t * media_codec_configuration_info; 574 575 avdtp_sep_t remote_sep; 576 hci_con_handle_t media_con_handle; 577 uint16_t l2cap_media_cid; 578 uint16_t l2cap_reporting_cid; 579 uint16_t l2cap_recovery_cid; 580 581 avdtp_stream_endpoint_state_t state; 582 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state; 583 avdtp_initiator_stream_endpoint_state_t initiator_config_state; 584 a2dp_state_t a2dp_state; 585 // active connection 586 avdtp_connection_t * connection; 587 588 // currently active remote seid 589 avdtp_capabilities_t remote_capabilities; 590 uint16_t remote_capabilities_bitmap; 591 592 uint16_t remote_configuration_bitmap; 593 avdtp_capabilities_t remote_configuration; 594 595 // temporary codec config used by A2DP Source 596 uint8_t set_config_remote_seid; 597 avdtp_media_codec_type_t media_codec_type; 598 uint8_t media_codec_info[8]; 599 600 // preferred SBC codec settings 601 uint32_t preferred_sampling_frequency; 602 uint8_t preferred_channel_mode; 603 604 // register request for media L2cap connection release 605 uint8_t media_disconnect; 606 uint8_t media_connect; 607 uint8_t start_stream; 608 uint8_t close_stream; 609 bool request_can_send_now; 610 uint8_t abort_stream; 611 uint8_t suspend_stream; 612 uint16_t sequence_number; 613 } avdtp_stream_endpoint_t; 614 615 void avdtp_init(void); 616 void avdtp_deinit(void); 617 618 avdtp_connection_t * avdtp_get_connection_for_bd_addr(bd_addr_t addr); 619 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid); 620 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid); 621 btstack_linked_list_t * avdtp_get_connections(void); 622 btstack_linked_list_t * avdtp_get_stream_endpoints(void); 623 624 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid); 625 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec(avdtp_media_codec_type_t codec_type); 626 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_other(uint32_t vendor_id, uint16_t codec_id); 627 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_and_type(avdtp_media_codec_type_t codec_type, avdtp_sep_type_t sep_type); 628 629 btstack_packet_handler_t avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint); 630 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size); 631 void avdtp_emit_source(uint8_t * packet, uint16_t size); 632 633 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint); 634 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 635 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 636 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets); 637 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); 638 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery); 639 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); 640 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation); 641 642 // sink only 643 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)); 644 645 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 646 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type); 647 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint); 648 649 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid); 650 uint8_t avdtp_disconnect(uint16_t avdtp_cid); 651 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback); 652 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback); 653 654 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid); 655 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid); 656 uint8_t avdtp_stop_stream (uint16_t avdtp_cid, uint8_t local_seid); 657 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid); 658 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid); 659 660 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid); 661 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 662 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_role_t role); 663 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid); 664 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); 665 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); 666 uint8_t avdtp_validate_media_configuration(const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 667 uint8_t reconfigure, const adtvp_media_codec_capabilities_t *media_codec); 668 669 // frequency will be used by avdtp_choose_sbc_sampling_frequency (if supported by both endpoints) 670 void avdtp_set_preferred_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 671 672 // channel_mode will be used by avdtp_choose_sbc_channel_mode (if supported by both endpoints) 673 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode); 674 675 void avdtp_set_preferred_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 676 677 /** 678 * @brief Get highest sampling frequency 679 * @param sampling_frequency_bitmap 680 * @return highest frequency or 0 681 */ 682 uint16_t avdtp_get_highest_sampling_frequency(uint8_t sampling_frequency_bitmap); 683 684 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap); 685 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap); 686 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap); 687 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap); 688 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap); 689 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value); 690 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value); 691 692 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint); 693 694 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint); 695 696 uint8_t avdtp_get_next_transaction_label(void); 697 698 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 699 uint8_t avdtp_start_stream_accept(uint16_t avdtp_cid, uint8_t local_seid); 700 uint8_t avdtp_start_stream_reject(uint16_t avdtp_cid, uint8_t local_seid); 701 #endif 702 703 #if defined __cplusplus 704 } 705 #endif 706 707 #endif // AVDTP_H 708