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 typedef enum { 106 CODEC_SPECIFIC_ERROR_CODE_ACCEPT = 0x00, 107 CODEC_SPECIFIC_ERROR_CODE_INVALID_CODEC_TYPE = 0xC1, 108 CODEC_SPECIFIC_ERROR_CODE_NOT_SUPPORTED_CODEC_TYPE = 0xC2, 109 CODEC_SPECIFIC_ERROR_CODE_INVALID_SAMPLING_FREQUENCY = 0xC3, 110 CODEC_SPECIFIC_ERROR_CODE_NOT_SUPPORTED_SAMPLING_FREQUENCY = 0xC4, 111 CODEC_SPECIFIC_ERROR_CODE_INVALID_CHANNEL_MODE = 0xC5, 112 CODEC_SPECIFIC_ERROR_CODE_INVALID_SUBBANDS = 0xC7, 113 CODEC_SPECIFIC_ERROR_CODE_INVALID_ALLOCATION_METHOD = 0xC9, 114 CODEC_SPECIFIC_ERROR_CODE_INVALID_MINIMUM_BITPOOL_VALUE = 0xCB, 115 CODEC_SPECIFIC_ERROR_CODE_INVALID_MAXIMUM_BITPOOL_VALUE = 0xCD, 116 CODEC_SPECIFIC_ERROR_CODE_INVALID_OBJECT_TYPE = 0xD6, 117 CODEC_SPECIFIC_ERROR_CODE_INVALID_CHANNELS = 0xD8, 118 CODEC_SPECIFIC_ERROR_CODE_INVALID_BLOCK_LENGTH = 0xDD, 119 } codec_specific_error_code_t; 120 121 // Signal Identifier fields 122 typedef enum { 123 AVDTP_SI_NONE = 0x00, 124 AVDTP_SI_DISCOVER = 0x01, 125 AVDTP_SI_GET_CAPABILITIES, 126 AVDTP_SI_SET_CONFIGURATION, 127 AVDTP_SI_GET_CONFIGURATION, 128 AVDTP_SI_RECONFIGURE, //5 129 AVDTP_SI_OPEN, //6 130 AVDTP_SI_START, //7 131 AVDTP_SI_CLOSE, 132 AVDTP_SI_SUSPEND, 133 AVDTP_SI_ABORT, //10 134 AVDTP_SI_SECURITY_CONTROL, 135 AVDTP_SI_GET_ALL_CAPABILITIES, //12 136 AVDTP_SI_DELAYREPORT, 137 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 138 AVDTP_SI_ACCEPT_START 139 #endif 140 } avdtp_signal_identifier_t; 141 142 typedef enum { 143 AVDTP_SINGLE_PACKET = 0, 144 AVDTP_START_PACKET , 145 AVDTP_CONTINUE_PACKET , 146 AVDTP_END_PACKET 147 } avdtp_packet_type_t; 148 149 typedef enum { 150 AVDTP_CMD_MSG = 0, 151 AVDTP_GENERAL_REJECT_MSG , 152 AVDTP_RESPONSE_ACCEPT_MSG , 153 AVDTP_RESPONSE_REJECT_MSG 154 } avdtp_message_type_t; 155 156 typedef enum { 157 AVDTP_AUDIO = 0, 158 AVDTP_VIDEO, 159 AVDTP_MULTIMEDIA 160 } avdtp_media_type_t; 161 162 typedef enum { 163 AVDTP_CODEC_SBC = 0x00, 164 AVDTP_CODEC_MPEG_1_2_AUDIO = 0x01, 165 AVDTP_CODEC_MPEG_2_4_AAC = 0x02, 166 AVDTP_CODEC_ATRAC_FAMILY = 0x04, 167 AVDTP_CODEC_NON_A2DP = 0xFF 168 } avdtp_media_codec_type_t; 169 170 typedef enum { 171 AVDTP_CONTENT_PROTECTION_DTCP = 0x0001, 172 AVDTP_CONTENT_PROTECTION_SCMS_T = 0x0002 173 } avdtp_content_protection_type_t; 174 175 typedef enum { 176 AVDTP_SOURCE = 0, 177 AVDTP_SINK 178 } avdtp_sep_type_t; 179 180 typedef enum { 181 AVDTP_ROLE_SOURCE = 0, 182 AVDTP_ROLE_SINK 183 } avdtp_role_t; 184 185 typedef enum { 186 AVDTP_SERVICE_CATEGORY_INVALID_0 = 0x00, 187 AVDTP_MEDIA_TRANSPORT = 0X01, 188 AVDTP_REPORTING, 189 AVDTP_RECOVERY, 190 AVDTP_CONTENT_PROTECTION, //4 191 AVDTP_HEADER_COMPRESSION, //5 192 AVDTP_MULTIPLEXING, //6 193 AVDTP_MEDIA_CODEC, //7 194 AVDTP_DELAY_REPORTING, //8 195 AVDTP_SERVICE_CATEGORY_INVALID_FF = 0xFF 196 } avdtp_service_category_t; 197 198 typedef struct { 199 uint8_t recovery_type; // 0x01 = RFC2733 200 uint8_t maximum_recovery_window_size; // 0x01 to 0x18, for a Transport Packet 201 uint8_t maximum_number_media_packets; // 0x01 to 0x18, The maximum number of media packets a specific parity code covers 202 } avdtp_recovery_capabilities_t; 203 204 typedef struct { 205 avdtp_media_type_t media_type; 206 avdtp_media_codec_type_t media_codec_type; 207 uint16_t media_codec_information_len; 208 uint8_t * media_codec_information; 209 } adtvp_media_codec_capabilities_t; 210 211 212 typedef struct { 213 uint16_t cp_type; 214 uint16_t cp_type_value_len; 215 uint8_t cp_type_value[AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN]; 216 } adtvp_content_protection_t; 217 218 typedef struct{ 219 uint8_t back_ch; // byte0 - bit 8; 0=Not Available/Not Used; 1=Available/In Use 220 uint8_t media; // byte0 - bit 7 221 uint8_t recovery; // byte0 - bit 6 222 } avdtp_header_compression_capabilities_t; 223 224 typedef struct{ 225 uint8_t fragmentation; // byte0 - bit 8, Allow Adaptation Layer Fragmentation, 0 no, 1 yes 226 // Request/indicate value of the Transport Session Identifier for a media, reporting, or recovery transport sessions, respectively 227 uint8_t transport_identifiers_num; 228 uint8_t transport_session_identifiers[3]; // byte1, upper 5bits, 0x01 to 0x1E 229 // Request/indicate value for TCID for a media, reporting, or transport session 230 uint8_t tcid[3]; // byte2 0x01 to 0x1E 231 } avdtp_multiplexing_mode_capabilities_t; 232 233 typedef struct{ 234 avdtp_recovery_capabilities_t recovery; 235 adtvp_media_codec_capabilities_t media_codec; 236 adtvp_content_protection_t content_protection; 237 avdtp_header_compression_capabilities_t header_compression; 238 avdtp_multiplexing_mode_capabilities_t multiplexing_mode; 239 } avdtp_capabilities_t; 240 241 typedef enum{ 242 AVDTP_SBC_48000 = 1, 243 AVDTP_SBC_44100 = 2, 244 AVDTP_SBC_32000 = 4, 245 AVDTP_SBC_16000 = 8 246 } avdtp_sbc_sampling_frequency_t; 247 248 typedef enum{ 249 AVDTP_SBC_JOINT_STEREO = 1, 250 AVDTP_SBC_STEREO = 2, 251 AVDTP_SBC_DUAL_CHANNEL = 4, 252 AVDTP_SBC_MONO = 8 253 } avdtp_sbc_channel_mode_t; 254 255 typedef enum{ 256 AVDTP_SBC_BLOCK_LENGTH_16 = 1, 257 AVDTP_SBC_BLOCK_LENGTH_12 = 2, 258 AVDTP_SBC_BLOCK_LENGTH_8 = 4, 259 AVDTP_SBC_BLOCK_LENGTH_4 = 8 260 } avdtp_sbc_block_length_t; 261 262 typedef enum{ 263 AVDTP_SBC_SUBBANDS_8 = 1, 264 AVDTP_SBC_SUBBANDS_4 = 2 265 } avdtp_sbc_subbands_t; 266 267 typedef enum{ 268 AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS = 1, 269 AVDTP_SBC_ALLOCATION_METHOD_SNR = 2 270 } avdtp_sbc_allocation_method_t; 271 272 typedef struct { 273 uint8_t fragmentation; 274 uint8_t starting_packet; // of fragmented SBC frame 275 uint8_t last_packet; // of fragmented SBC frame 276 uint8_t num_frames; 277 } avdtp_sbc_codec_header_t; 278 279 typedef enum { 280 AVDTP_MPEG_LAYER_1 = 1, 281 AVDTP_MPEG_LAYER_2, 282 AVDTP_MPEG_LAYER_3, 283 } avdtp_mpeg_layer_t; 284 285 286 typedef enum { 287 AVDTP_AAC_MPEG2_LC = 1, 288 AVDTP_AAC_MPEG4_LC, 289 AVDTP_AAC_MPEG4_LTP, 290 AVDTP_AAC_MPEG4_SCALABLE 291 } avdtp_aac_object_type_t; 292 293 typedef enum { 294 AVDTP_ATRAC_VERSION_1 = 1, 295 AVDTP_ATRAC_VERSION_2, 296 AVDTP_ATRAC_VERSION_3 297 } avdtp_atrac_version_t; 298 299 // used for MPEG1/2 Audio, ATRAC (no stereo mode) 300 typedef enum { 301 AVDTP_CHANNEL_MODE_MONO = 1, 302 AVDTP_CHANNEL_MODE_DUAL_CHANNEL, 303 AVDTP_CHANNEL_MODE_STEREO, 304 AVDTP_CHANNEL_MODE_JOINT_STEREO, 305 } avdtp_channel_mode_t; 306 307 typedef struct { 308 uint16_t sampling_frequency; 309 avdtp_channel_mode_t channel_mode; 310 uint8_t block_length; 311 uint8_t subbands; 312 avdtp_sbc_allocation_method_t allocation_method; 313 uint8_t min_bitpool_value; 314 uint8_t max_bitpool_value; 315 } avdtp_configuration_sbc_t; 316 317 typedef struct { 318 avdtp_mpeg_layer_t layer; 319 uint8_t crc; 320 avdtp_channel_mode_t channel_mode; 321 uint8_t media_payload_format; 322 uint16_t sampling_frequency; 323 uint8_t vbr; 324 uint8_t bit_rate_index; 325 } avdtp_configuration_mpeg_audio_t; 326 327 typedef struct { 328 avdtp_aac_object_type_t object_type; 329 uint32_t sampling_frequency; 330 uint8_t channels; 331 uint32_t bit_rate; 332 uint8_t vbr; 333 } avdtp_configuration_mpeg_aac_t; 334 335 typedef struct { 336 avdtp_atrac_version_t version; 337 avdtp_channel_mode_t channel_mode; 338 uint16_t sampling_frequency; 339 uint8_t vbr; 340 uint8_t bit_rate_index; 341 uint16_t maximum_sul; 342 } avdtp_configuration_atrac_t; 343 344 345 346 typedef struct { 347 uint8_t version; 348 uint8_t padding; 349 uint8_t extension; 350 uint8_t csrc_count; 351 uint8_t marker; 352 uint8_t payload_type; 353 354 uint16_t sequence_number; 355 uint32_t timestamp; 356 uint32_t synchronization_source; 357 358 uint32_t csrc_list[AVDTP_MAX_CSRC_NUM]; 359 } avdtp_media_packet_header_t; 360 361 typedef enum { 362 AVDTP_BASIC_SERVICE_MODE = 0, 363 AVDTP_MULTIPLEXING_SERVICE_MODE 364 } avdtp_service_mode_t; 365 366 typedef enum { 367 AVDTP_STREAM_ENDPOINT_IDLE = 0, 368 AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE, 369 AVDTP_STREAM_ENDPOINT_CONFIGURED, 370 371 AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM, 372 AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM, 373 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED, 374 375 AVDTP_STREAM_ENDPOINT_OPENED, 376 AVDTP_STREAM_ENDPOINT_STREAMING, 377 378 AVDTP_STREAM_ENDPOINT_CLOSING, 379 AVDTP_STREAM_ENDPOINT_ABORTING, 380 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED 381 } avdtp_stream_endpoint_state_t; 382 383 typedef enum { 384 AVDTP_INITIATOR_STREAM_CONFIG_IDLE = 0, 385 AVDTP_INITIATOR_W2_SET_CONFIGURATION, 386 AVDTP_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID, 387 AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID, 388 389 AVDTP_INITIATOR_W2_OPEN_STREAM, 390 391 AVDTP_INITIATOR_W2_STREAMING_ABORT, 392 AVDTP_INITIATOR_FRAGMENTATED_COMMAND, 393 AVDTP_INITIATOR_W4_ANSWER 394 } avdtp_initiator_stream_endpoint_state_t; 395 396 typedef enum { 397 AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE = 0, 398 AVDTP_ACCEPTOR_W2_ACCEPT_GET_CAPABILITIES, 399 AVDTP_ACCEPTOR_W2_ACCEPT_GET_ALL_CAPABILITIES, 400 AVDTP_ACCEPTOR_W2_ACCEPT_DELAY_REPORT, 401 AVDTP_ACCEPTOR_W2_ACCEPT_SET_CONFIGURATION, 402 AVDTP_ACCEPTOR_W2_ACCEPT_RECONFIGURE, 403 AVDTP_ACCEPTOR_W2_ACCEPT_GET_CONFIGURATION, 404 AVDTP_ACCEPTOR_W2_ACCEPT_OPEN_STREAM, 405 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 406 AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM, 407 AVDTP_ACCEPTOR_W2_REJECT_START_STREAM, 408 #endif 409 AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM, 410 AVDTP_ACCEPTOR_W2_ACCEPT_CLOSE_STREAM, 411 AVDTP_ACCEPTOR_W2_ACCEPT_ABORT_STREAM, 412 AVDTP_ACCEPTOR_W2_ACCEPT_SUSPEND_STREAM, 413 AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 414 AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 415 AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD 416 } avdtp_acceptor_stream_endpoint_state_t; 417 418 typedef struct { 419 uint8_t seid; // 0x01 – 0x3E, 6bit 420 uint8_t in_use; // 1 bit, 0 - not in use, 1 - in use 421 avdtp_media_type_t media_type; // 4 bit 422 avdtp_sep_type_t type; // 1 bit, 0 - SRC, 1 - SNK 423 424 uint16_t registered_service_categories; 425 avdtp_capabilities_t capabilities; 426 427 uint16_t configured_service_categories; 428 avdtp_capabilities_t configuration; 429 } avdtp_sep_t; 430 431 432 typedef enum { 433 AVDTP_SIGNALING_CONNECTION_IDLE = 0, 434 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK, 435 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE, 436 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE, 437 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE, 438 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED, 439 AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY, 440 AVDTP_SIGNALING_CONNECTION_OPENED, 441 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED 442 } avdtp_connection_state_t; 443 444 typedef enum { 445 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE = 0, 446 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS, 447 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 448 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 449 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE 450 } avdtp_acceptor_connection_state_t; 451 452 typedef enum { 453 AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE = 0, 454 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS, 455 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SINK, 456 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SOURCE, 457 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES, 458 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES, 459 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES, 460 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION, 461 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT, 462 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER 463 } avdtp_initiator_connection_state_t; 464 465 typedef struct { 466 uint8_t command[200]; 467 uint16_t size; 468 uint16_t offset; 469 uint8_t acp_seid; 470 uint8_t int_seid; 471 uint8_t transaction_label; 472 uint16_t num_packets; 473 avdtp_signal_identifier_t signal_identifier; 474 avdtp_message_type_t message_type; 475 avdtp_packet_type_t packet_type; 476 } avdtp_signaling_packet_t; 477 478 typedef enum { 479 AVDTP_CONFIGURATION_STATE_IDLE = 0, 480 AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED, 481 AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED, 482 AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED, 483 AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED, 484 } avtdp_configuration_state_t; 485 486 typedef enum { 487 A2DP_IDLE = 0, 488 A2DP_W4_CONNECTED, 489 A2DP_CONNECTED, 490 A2DP_DISCOVER_SEPS, 491 A2DP_GET_CAPABILITIES, 492 A2DP_W2_GET_ALL_CAPABILITIES, //5 493 A2DP_DISCOVERY_DONE, 494 A2DP_SET_CONFIGURATION, 495 A2DP_W4_GET_CONFIGURATION, 496 A2DP_W4_SET_CONFIGURATION, 497 A2DP_CONFIGURED, 498 A2DP_W2_SUSPEND_STREAM_WITH_SEID, //10 499 A2DP_W2_RECONFIGURE_WITH_SEID, 500 A2DP_W2_OPEN_STREAM_WITH_SEID, 501 A2DP_W4_OPEN_STREAM_WITH_SEID, 502 A2DP_W2_START_STREAM_WITH_SEID, 503 A2DP_W2_ABORT_STREAM_WITH_SEID, //15 504 A2DP_W2_STOP_STREAM_WITH_SEID, 505 A2DP_STREAMING_OPENED 506 } a2dp_state_t; 507 508 typedef struct { 509 bool discover_seps; 510 bool outgoing_active; 511 bool have_config; 512 bool stream_endpoint_configured; 513 a2dp_state_t state; 514 struct avdtp_stream_endpoint * local_stream_endpoint; 515 } a2dp_config_process_t; 516 517 typedef struct { 518 btstack_linked_item_t item; 519 bd_addr_t remote_addr; 520 521 uint16_t avdtp_cid; 522 hci_con_handle_t con_handle; 523 524 // SDP results 525 uint16_t avdtp_l2cap_psm; 526 uint16_t avdtp_version; 527 bool sink_supported; 528 bool source_supported; 529 530 uint16_t l2cap_signaling_cid; 531 uint16_t l2cap_mtu; 532 533 avdtp_connection_state_t state; 534 avdtp_acceptor_connection_state_t acceptor_connection_state; 535 avdtp_initiator_connection_state_t initiator_connection_state; 536 537 // used to reassemble fragmented commands 538 avdtp_signaling_packet_t acceptor_signaling_packet; 539 540 // used to prepare outgoing signaling packets 541 avdtp_signaling_packet_t initiator_signaling_packet; 542 543 uint8_t initiator_local_seid; 544 uint8_t initiator_remote_seid; 545 546 uint8_t acceptor_local_seid; 547 548 uint16_t delay_ms; 549 550 // for repeating the set_configuration 551 void * active_stream_endpoint; 552 553 uint8_t initiator_transaction_label; 554 uint8_t acceptor_transaction_label; 555 bool wait_to_send_acceptor; 556 bool wait_to_send_initiator; 557 558 uint8_t suspended_seids[AVDTP_MAX_NUM_SEPS]; 559 uint8_t num_suspended_seids; 560 561 uint8_t reject_service_category; 562 avdtp_signal_identifier_t reject_signal_identifier; 563 uint8_t error_code; 564 565 // configuration state machine 566 avtdp_configuration_state_t configuration_state; 567 568 bool incoming_declined; 569 btstack_timer_source_t retry_timer; 570 571 // A2DP SOURCE 572 a2dp_config_process_t a2dp_source_config_process; 573 574 // A2DP SINK 575 a2dp_config_process_t a2dp_sink_config_process; 576 577 } avdtp_connection_t; 578 579 580 typedef struct avdtp_stream_endpoint { 581 btstack_linked_item_t item; 582 583 // original capabilities configured via avdtp_register_x_category 584 avdtp_sep_t sep; 585 586 // media codec configuration - provided by user 587 uint16_t media_codec_configuration_len; 588 uint8_t * media_codec_configuration_info; 589 590 avdtp_sep_t remote_sep; 591 hci_con_handle_t media_con_handle; 592 uint16_t l2cap_media_cid; 593 uint16_t l2cap_reporting_cid; 594 uint16_t l2cap_recovery_cid; 595 596 avdtp_stream_endpoint_state_t state; 597 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state; 598 avdtp_initiator_stream_endpoint_state_t initiator_config_state; 599 a2dp_state_t a2dp_state; 600 // active connection 601 avdtp_connection_t * connection; 602 603 // currently active remote seid 604 avdtp_capabilities_t remote_capabilities; 605 uint16_t remote_capabilities_bitmap; 606 607 uint16_t remote_configuration_bitmap; 608 avdtp_capabilities_t remote_configuration; 609 610 // temporary codec config used by A2DP Source 611 uint8_t set_config_remote_seid; 612 avdtp_media_codec_type_t media_codec_type; 613 uint8_t media_codec_info[8]; 614 615 // preferred SBC codec settings 616 uint32_t preferred_sampling_frequency; 617 uint8_t preferred_channel_mode; 618 619 // register request for media L2cap connection release 620 uint8_t media_disconnect; 621 uint8_t media_connect; 622 uint8_t start_stream; 623 uint8_t close_stream; 624 bool request_can_send_now; 625 uint8_t abort_stream; 626 uint8_t suspend_stream; 627 uint16_t sequence_number; 628 } avdtp_stream_endpoint_t; 629 630 void avdtp_init(void); 631 void avdtp_deinit(void); 632 633 avdtp_connection_t * avdtp_get_connection_for_bd_addr(bd_addr_t addr); 634 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid); 635 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid); 636 btstack_linked_list_t * avdtp_get_connections(void); 637 btstack_linked_list_t * avdtp_get_stream_endpoints(void); 638 639 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid); 640 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec(avdtp_media_codec_type_t codec_type); 641 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_other(uint32_t vendor_id, uint16_t codec_id); 642 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); 643 644 btstack_packet_handler_t avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint); 645 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size); 646 void avdtp_emit_source(uint8_t * packet, uint16_t size); 647 648 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint); 649 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 650 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 651 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets); 652 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); 653 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery); 654 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); 655 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation); 656 657 // sink only 658 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)); 659 660 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 661 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type); 662 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint); 663 664 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid); 665 uint8_t avdtp_disconnect(uint16_t avdtp_cid); 666 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback); 667 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback); 668 669 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid); 670 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid); 671 uint8_t avdtp_stop_stream (uint16_t avdtp_cid, uint8_t local_seid); 672 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid); 673 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid); 674 675 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid); 676 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 677 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_role_t role); 678 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid); 679 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); 680 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); 681 uint8_t avdtp_validate_media_configuration(const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 682 uint8_t reconfigure, const adtvp_media_codec_capabilities_t *media_codec); 683 684 // frequency will be used by avdtp_choose_sbc_sampling_frequency (if supported by both endpoints) 685 void avdtp_set_preferred_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 686 687 // channel_mode will be used by avdtp_choose_sbc_channel_mode (if supported by both endpoints) 688 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode); 689 690 void avdtp_set_preferred_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 691 692 /** 693 * @brief Get highest sampling frequency 694 * @param sampling_frequency_bitmap 695 * @return highest frequency or 0 696 */ 697 uint16_t avdtp_get_highest_sampling_frequency(uint8_t sampling_frequency_bitmap); 698 699 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap); 700 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap); 701 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap); 702 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap); 703 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap); 704 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value); 705 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value); 706 707 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint); 708 709 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint); 710 711 uint8_t avdtp_get_next_transaction_label(void); 712 713 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 714 uint8_t avdtp_start_stream_accept(uint16_t avdtp_cid, uint8_t local_seid); 715 uint8_t avdtp_start_stream_reject(uint16_t avdtp_cid, uint8_t local_seid); 716 #endif 717 718 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 719 void avdtp_init_fuzz(void); 720 void avdtp_packet_handler_fuzz(uint8_t *packet, uint16_t size); 721 #endif 722 723 #if defined __cplusplus 724 } 725 #endif 726 727 #endif // AVDTP_H 728