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_NOT_SUPPORTED_OBJECT_TYPE = 0xD7, 118 CODEC_SPECIFIC_ERROR_CODE_INVALID_CHANNELS = 0xD8, 119 CODEC_SPECIFIC_ERROR_CODE_NOT_SUPPORTED_CHANNELS = 0xD9, 120 CODEC_SPECIFIC_ERROR_CODE_INVALID_BLOCK_LENGTH = 0xDD, 121 CODEC_SPECIFIC_ERROR_CODE_INVALID_DRC = 0xE4, 122 } codec_specific_error_code_t; 123 124 // Signal Identifier fields 125 typedef enum { 126 AVDTP_SI_NONE = 0x00, 127 AVDTP_SI_DISCOVER = 0x01, 128 AVDTP_SI_GET_CAPABILITIES, 129 AVDTP_SI_SET_CONFIGURATION, 130 AVDTP_SI_GET_CONFIGURATION, 131 AVDTP_SI_RECONFIGURE, //5 132 AVDTP_SI_OPEN, //6 133 AVDTP_SI_START, //7 134 AVDTP_SI_CLOSE, 135 AVDTP_SI_SUSPEND, 136 AVDTP_SI_ABORT, //10 137 AVDTP_SI_SECURITY_CONTROL, 138 AVDTP_SI_GET_ALL_CAPABILITIES, //12 139 AVDTP_SI_DELAYREPORT, 140 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 141 AVDTP_SI_ACCEPT_START 142 #endif 143 } avdtp_signal_identifier_t; 144 145 typedef enum { 146 AVDTP_SINGLE_PACKET = 0, 147 AVDTP_START_PACKET , 148 AVDTP_CONTINUE_PACKET , 149 AVDTP_END_PACKET 150 } avdtp_packet_type_t; 151 152 typedef enum { 153 AVDTP_CMD_MSG = 0, 154 AVDTP_GENERAL_REJECT_MSG , 155 AVDTP_RESPONSE_ACCEPT_MSG , 156 AVDTP_RESPONSE_REJECT_MSG 157 } avdtp_message_type_t; 158 159 typedef enum { 160 AVDTP_AUDIO = 0, 161 AVDTP_VIDEO, 162 AVDTP_MULTIMEDIA 163 } avdtp_media_type_t; 164 165 typedef enum { 166 AVDTP_CODEC_SBC = 0x00, 167 AVDTP_CODEC_MPEG_1_2_AUDIO = 0x01, 168 AVDTP_CODEC_MPEG_2_4_AAC = 0x02, 169 AVDTP_CODEC_ATRAC_FAMILY = 0x04, 170 AVDTP_CODEC_NON_A2DP = 0xFF 171 } avdtp_media_codec_type_t; 172 173 typedef enum { 174 AVDTP_CONTENT_PROTECTION_DTCP = 0x0001, 175 AVDTP_CONTENT_PROTECTION_SCMS_T = 0x0002 176 } avdtp_content_protection_type_t; 177 178 typedef enum { 179 AVDTP_SOURCE = 0, 180 AVDTP_SINK 181 } avdtp_sep_type_t; 182 183 typedef enum { 184 AVDTP_ROLE_SOURCE = 0, 185 AVDTP_ROLE_SINK 186 } avdtp_role_t; 187 188 typedef enum { 189 AVDTP_SERVICE_CATEGORY_INVALID_0 = 0x00, 190 AVDTP_MEDIA_TRANSPORT = 0X01, 191 AVDTP_REPORTING, 192 AVDTP_RECOVERY, 193 AVDTP_CONTENT_PROTECTION, //4 194 AVDTP_HEADER_COMPRESSION, //5 195 AVDTP_MULTIPLEXING, //6 196 AVDTP_MEDIA_CODEC, //7 197 AVDTP_DELAY_REPORTING, //8 198 AVDTP_SERVICE_CATEGORY_INVALID_FF = 0xFF 199 } avdtp_service_category_t; 200 201 typedef struct { 202 uint8_t recovery_type; // 0x01 = RFC2733 203 uint8_t maximum_recovery_window_size; // 0x01 to 0x18, for a Transport Packet 204 uint8_t maximum_number_media_packets; // 0x01 to 0x18, The maximum number of media packets a specific parity code covers 205 } avdtp_recovery_capabilities_t; 206 207 typedef struct { 208 avdtp_media_type_t media_type; 209 avdtp_media_codec_type_t media_codec_type; 210 uint16_t media_codec_information_len; 211 uint8_t * media_codec_information; 212 } adtvp_media_codec_capabilities_t; 213 214 215 typedef struct { 216 uint16_t cp_type; 217 uint16_t cp_type_value_len; 218 uint8_t cp_type_value[AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN]; 219 } adtvp_content_protection_t; 220 221 typedef struct{ 222 uint8_t back_ch; // byte0 - bit 8; 0=Not Available/Not Used; 1=Available/In Use 223 uint8_t media; // byte0 - bit 7 224 uint8_t recovery; // byte0 - bit 6 225 } avdtp_header_compression_capabilities_t; 226 227 typedef struct{ 228 uint8_t fragmentation; // byte0 - bit 8, Allow Adaptation Layer Fragmentation, 0 no, 1 yes 229 // Request/indicate value of the Transport Session Identifier for a media, reporting, or recovery transport sessions, respectively 230 uint8_t transport_identifiers_num; 231 uint8_t transport_session_identifiers[3]; // byte1, upper 5bits, 0x01 to 0x1E 232 // Request/indicate value for TCID for a media, reporting, or transport session 233 uint8_t tcid[3]; // byte2 0x01 to 0x1E 234 } avdtp_multiplexing_mode_capabilities_t; 235 236 typedef struct{ 237 avdtp_recovery_capabilities_t recovery; 238 adtvp_media_codec_capabilities_t media_codec; 239 adtvp_content_protection_t content_protection; 240 avdtp_header_compression_capabilities_t header_compression; 241 avdtp_multiplexing_mode_capabilities_t multiplexing_mode; 242 } avdtp_capabilities_t; 243 244 typedef enum{ 245 AVDTP_SBC_48000 = 1, 246 AVDTP_SBC_44100 = 2, 247 AVDTP_SBC_32000 = 4, 248 AVDTP_SBC_16000 = 8 249 } avdtp_sbc_sampling_frequency_t; 250 251 typedef enum{ 252 AVDTP_SBC_JOINT_STEREO = 1, 253 AVDTP_SBC_STEREO = 2, 254 AVDTP_SBC_DUAL_CHANNEL = 4, 255 AVDTP_SBC_MONO = 8 256 } avdtp_sbc_channel_mode_t; 257 258 typedef enum{ 259 AVDTP_SBC_BLOCK_LENGTH_16 = 1, 260 AVDTP_SBC_BLOCK_LENGTH_12 = 2, 261 AVDTP_SBC_BLOCK_LENGTH_8 = 4, 262 AVDTP_SBC_BLOCK_LENGTH_4 = 8 263 } avdtp_sbc_block_length_t; 264 265 typedef enum{ 266 AVDTP_SBC_SUBBANDS_8 = 1, 267 AVDTP_SBC_SUBBANDS_4 = 2 268 } avdtp_sbc_subbands_t; 269 270 typedef enum{ 271 AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS = 1, 272 AVDTP_SBC_ALLOCATION_METHOD_SNR = 2 273 } avdtp_sbc_allocation_method_t; 274 275 typedef struct { 276 uint8_t fragmentation; 277 uint8_t starting_packet; // of fragmented SBC frame 278 uint8_t last_packet; // of fragmented SBC frame 279 uint8_t num_frames; 280 } avdtp_sbc_codec_header_t; 281 282 typedef enum { 283 AVDTP_MPEG_LAYER_1 = 1, 284 AVDTP_MPEG_LAYER_2, 285 AVDTP_MPEG_LAYER_3, 286 } avdtp_mpeg_layer_t; 287 288 289 typedef enum { 290 AVDTP_AAC_MPEG2_LC = 1, 291 AVDTP_AAC_MPEG4_LC, 292 AVDTP_AAC_MPEG4_LTP, 293 AVDTP_AAC_MPEG4_SCALABLE 294 } avdtp_aac_object_type_t; 295 296 typedef enum { 297 AVDTP_ATRAC_VERSION_1 = 1, 298 AVDTP_ATRAC_VERSION_2, 299 AVDTP_ATRAC_VERSION_3 300 } avdtp_atrac_version_t; 301 302 // used for MPEG1/2 Audio, ATRAC (no stereo mode) 303 typedef enum { 304 AVDTP_CHANNEL_MODE_MONO = 1, 305 AVDTP_CHANNEL_MODE_DUAL_CHANNEL, 306 AVDTP_CHANNEL_MODE_STEREO, 307 AVDTP_CHANNEL_MODE_JOINT_STEREO, 308 } avdtp_channel_mode_t; 309 310 typedef struct { 311 uint16_t sampling_frequency; 312 avdtp_channel_mode_t channel_mode; 313 uint8_t block_length; 314 uint8_t subbands; 315 avdtp_sbc_allocation_method_t allocation_method; 316 uint8_t min_bitpool_value; 317 uint8_t max_bitpool_value; 318 } avdtp_configuration_sbc_t; 319 320 typedef struct { 321 avdtp_mpeg_layer_t layer; 322 uint8_t crc; 323 avdtp_channel_mode_t channel_mode; 324 uint8_t media_payload_format; 325 uint16_t sampling_frequency; 326 uint8_t vbr; 327 uint8_t bit_rate_index; 328 } avdtp_configuration_mpeg_audio_t; 329 330 typedef struct { 331 avdtp_aac_object_type_t object_type; 332 uint32_t sampling_frequency; 333 uint8_t channels; 334 uint32_t bit_rate; 335 uint8_t vbr; 336 } avdtp_configuration_mpeg_aac_t; 337 338 typedef struct { 339 avdtp_atrac_version_t version; 340 avdtp_channel_mode_t channel_mode; 341 uint16_t sampling_frequency; 342 uint8_t vbr; 343 uint8_t bit_rate_index; 344 uint16_t maximum_sul; 345 } avdtp_configuration_atrac_t; 346 347 348 349 typedef struct { 350 uint8_t version; 351 uint8_t padding; 352 uint8_t extension; 353 uint8_t csrc_count; 354 uint8_t marker; 355 uint8_t payload_type; 356 357 uint16_t sequence_number; 358 uint32_t timestamp; 359 uint32_t synchronization_source; 360 361 uint32_t csrc_list[AVDTP_MAX_CSRC_NUM]; 362 } avdtp_media_packet_header_t; 363 364 typedef enum { 365 AVDTP_BASIC_SERVICE_MODE = 0, 366 AVDTP_MULTIPLEXING_SERVICE_MODE 367 } avdtp_service_mode_t; 368 369 typedef enum { 370 AVDTP_STREAM_ENDPOINT_IDLE = 0, 371 AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE, 372 AVDTP_STREAM_ENDPOINT_CONFIGURED, 373 374 AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM, 375 AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM, 376 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED, 377 378 AVDTP_STREAM_ENDPOINT_OPENED, 379 AVDTP_STREAM_ENDPOINT_STREAMING, 380 381 AVDTP_STREAM_ENDPOINT_CLOSING, 382 AVDTP_STREAM_ENDPOINT_ABORTING, 383 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED 384 } avdtp_stream_endpoint_state_t; 385 386 typedef enum { 387 AVDTP_INITIATOR_STREAM_CONFIG_IDLE = 0, 388 AVDTP_INITIATOR_W2_SET_CONFIGURATION, 389 AVDTP_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID, 390 AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID, 391 392 AVDTP_INITIATOR_W2_OPEN_STREAM, 393 394 AVDTP_INITIATOR_W2_STREAMING_ABORT, 395 AVDTP_INITIATOR_FRAGMENTATED_COMMAND, 396 AVDTP_INITIATOR_W4_ANSWER 397 } avdtp_initiator_stream_endpoint_state_t; 398 399 typedef enum { 400 AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE = 0, 401 AVDTP_ACCEPTOR_W2_ACCEPT_GET_CAPABILITIES, 402 AVDTP_ACCEPTOR_W2_ACCEPT_GET_ALL_CAPABILITIES, 403 AVDTP_ACCEPTOR_W2_ACCEPT_DELAY_REPORT, 404 AVDTP_ACCEPTOR_W2_ACCEPT_SET_CONFIGURATION, 405 AVDTP_ACCEPTOR_W2_ACCEPT_RECONFIGURE, 406 AVDTP_ACCEPTOR_W2_ACCEPT_GET_CONFIGURATION, 407 AVDTP_ACCEPTOR_W2_ACCEPT_OPEN_STREAM, 408 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 409 AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM, 410 AVDTP_ACCEPTOR_W2_REJECT_START_STREAM, 411 #endif 412 AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM, 413 AVDTP_ACCEPTOR_W2_ACCEPT_CLOSE_STREAM, 414 AVDTP_ACCEPTOR_W2_ACCEPT_ABORT_STREAM, 415 AVDTP_ACCEPTOR_W2_ACCEPT_SUSPEND_STREAM, 416 AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 417 AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 418 AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD 419 } avdtp_acceptor_stream_endpoint_state_t; 420 421 typedef struct { 422 uint8_t seid; // 0x01 – 0x3E, 6bit 423 uint8_t in_use; // 1 bit, 0 - not in use, 1 - in use 424 avdtp_media_type_t media_type; // 4 bit 425 avdtp_sep_type_t type; // 1 bit, 0 - SRC, 1 - SNK 426 427 uint16_t registered_service_categories; 428 avdtp_capabilities_t capabilities; 429 430 uint16_t configured_service_categories; 431 avdtp_capabilities_t configuration; 432 } avdtp_sep_t; 433 434 435 typedef enum { 436 AVDTP_SIGNALING_CONNECTION_IDLE = 0, 437 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK, 438 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE, 439 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE, 440 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE, 441 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED, 442 AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY, 443 AVDTP_SIGNALING_CONNECTION_OPENED, 444 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED 445 } avdtp_connection_state_t; 446 447 typedef enum { 448 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE = 0, 449 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS, 450 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 451 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 452 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE 453 } avdtp_acceptor_connection_state_t; 454 455 typedef enum { 456 AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE = 0, 457 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS, 458 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SINK, 459 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SOURCE, 460 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES, 461 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES, 462 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES, 463 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION, 464 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT, 465 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER 466 } avdtp_initiator_connection_state_t; 467 468 typedef struct { 469 uint8_t command[200]; 470 uint16_t size; 471 uint16_t offset; 472 uint8_t acp_seid; 473 uint8_t int_seid; 474 uint8_t transaction_label; 475 uint16_t num_packets; 476 avdtp_signal_identifier_t signal_identifier; 477 avdtp_message_type_t message_type; 478 avdtp_packet_type_t packet_type; 479 } avdtp_signaling_packet_t; 480 481 typedef enum { 482 AVDTP_CONFIGURATION_STATE_IDLE = 0, 483 AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED, 484 AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED, 485 AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED, 486 AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED, 487 } avtdp_configuration_state_t; 488 489 typedef enum { 490 A2DP_IDLE = 0, 491 A2DP_W4_CONNECTED, 492 A2DP_CONNECTED, 493 A2DP_DISCOVER_SEPS, 494 A2DP_GET_CAPABILITIES, 495 A2DP_W2_GET_ALL_CAPABILITIES, //5 496 A2DP_DISCOVERY_DONE, 497 A2DP_SET_CONFIGURATION, 498 A2DP_W4_GET_CONFIGURATION, 499 A2DP_W4_SET_CONFIGURATION, 500 A2DP_CONFIGURED, 501 A2DP_W2_SUSPEND_STREAM_WITH_SEID, //10 502 A2DP_W2_RECONFIGURE_WITH_SEID, 503 A2DP_W2_OPEN_STREAM_WITH_SEID, 504 A2DP_W4_OPEN_STREAM_WITH_SEID, 505 A2DP_W2_START_STREAM_WITH_SEID, 506 A2DP_W2_ABORT_STREAM_WITH_SEID, //15 507 A2DP_W2_STOP_STREAM_WITH_SEID, 508 A2DP_STREAMING_OPENED 509 } a2dp_state_t; 510 511 typedef struct { 512 bool discover_seps; 513 bool outgoing_active; 514 bool have_config; 515 bool stream_endpoint_configured; 516 a2dp_state_t state; 517 struct avdtp_stream_endpoint * local_stream_endpoint; 518 } a2dp_config_process_t; 519 520 typedef struct { 521 btstack_linked_item_t item; 522 bd_addr_t remote_addr; 523 524 uint16_t avdtp_cid; 525 hci_con_handle_t con_handle; 526 527 // SDP results 528 uint16_t avdtp_l2cap_psm; 529 uint16_t avdtp_version; 530 bool sink_supported; 531 bool source_supported; 532 533 uint16_t l2cap_signaling_cid; 534 uint16_t l2cap_mtu; 535 536 avdtp_connection_state_t state; 537 avdtp_acceptor_connection_state_t acceptor_connection_state; 538 avdtp_initiator_connection_state_t initiator_connection_state; 539 540 // used to reassemble fragmented commands 541 avdtp_signaling_packet_t acceptor_signaling_packet; 542 543 // used to prepare outgoing signaling packets 544 avdtp_signaling_packet_t initiator_signaling_packet; 545 546 uint8_t initiator_local_seid; 547 uint8_t initiator_remote_seid; 548 549 uint8_t acceptor_local_seid; 550 551 uint16_t delay_ms; 552 553 // for repeating the set_configuration 554 void * active_stream_endpoint; 555 556 uint8_t initiator_transaction_label; 557 uint8_t acceptor_transaction_label; 558 bool wait_to_send_acceptor; 559 bool wait_to_send_initiator; 560 561 uint8_t suspended_seids[AVDTP_MAX_NUM_SEPS]; 562 uint8_t num_suspended_seids; 563 564 uint8_t reject_service_category; 565 avdtp_signal_identifier_t reject_signal_identifier; 566 uint8_t error_code; 567 568 // configuration state machine 569 avtdp_configuration_state_t configuration_state; 570 571 bool incoming_declined; 572 btstack_timer_source_t retry_timer; 573 574 // A2DP SOURCE 575 a2dp_config_process_t a2dp_source_config_process; 576 577 // A2DP SINK 578 a2dp_config_process_t a2dp_sink_config_process; 579 580 } avdtp_connection_t; 581 582 583 typedef struct avdtp_stream_endpoint { 584 btstack_linked_item_t item; 585 586 // original capabilities configured via avdtp_register_x_category 587 avdtp_sep_t sep; 588 589 // media codec configuration - provided by user 590 uint16_t media_codec_configuration_len; 591 uint8_t * media_codec_configuration_info; 592 593 avdtp_sep_t remote_sep; 594 hci_con_handle_t media_con_handle; 595 uint16_t l2cap_media_cid; 596 uint16_t l2cap_reporting_cid; 597 uint16_t l2cap_recovery_cid; 598 599 avdtp_stream_endpoint_state_t state; 600 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state; 601 avdtp_initiator_stream_endpoint_state_t initiator_config_state; 602 a2dp_state_t a2dp_state; 603 // active connection 604 avdtp_connection_t * connection; 605 606 // currently active remote seid 607 avdtp_capabilities_t remote_capabilities; 608 uint16_t remote_capabilities_bitmap; 609 610 uint16_t remote_configuration_bitmap; 611 avdtp_capabilities_t remote_configuration; 612 613 // temporary codec config used by A2DP Source 614 uint8_t set_config_remote_seid; 615 avdtp_media_codec_type_t media_codec_type; 616 uint8_t media_codec_info[8]; 617 618 // preferred SBC codec settings 619 uint32_t preferred_sampling_frequency; 620 uint8_t preferred_channel_mode; 621 622 // register request for media L2cap connection release 623 uint8_t media_disconnect; 624 uint8_t media_connect; 625 uint8_t start_stream; 626 uint8_t close_stream; 627 bool request_can_send_now; 628 uint8_t abort_stream; 629 uint8_t suspend_stream; 630 uint16_t sequence_number; 631 } avdtp_stream_endpoint_t; 632 633 void avdtp_init(void); 634 void avdtp_deinit(void); 635 636 avdtp_connection_t * avdtp_get_connection_for_bd_addr(bd_addr_t addr); 637 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid); 638 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid); 639 btstack_linked_list_t * avdtp_get_connections(void); 640 btstack_linked_list_t * avdtp_get_stream_endpoints(void); 641 642 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid); 643 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec(avdtp_media_codec_type_t codec_type); 644 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_other(uint32_t vendor_id, uint16_t codec_id); 645 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); 646 647 btstack_packet_handler_t avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint); 648 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size); 649 void avdtp_emit_source(uint8_t * packet, uint16_t size); 650 651 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint); 652 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 653 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 654 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets); 655 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); 656 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery); 657 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); 658 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation); 659 660 // sink only 661 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)); 662 663 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 664 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type); 665 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint); 666 667 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid); 668 uint8_t avdtp_disconnect(uint16_t avdtp_cid); 669 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback); 670 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback); 671 672 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid); 673 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid); 674 uint8_t avdtp_stop_stream (uint16_t avdtp_cid, uint8_t local_seid); 675 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid); 676 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid); 677 678 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid); 679 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 680 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_role_t role); 681 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid); 682 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); 683 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); 684 uint8_t avdtp_validate_media_configuration(const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 685 uint8_t reconfigure, const adtvp_media_codec_capabilities_t *media_codec); 686 687 // frequency will be used by avdtp_choose_sbc_sampling_frequency (if supported by both endpoints) 688 void avdtp_set_preferred_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 689 690 // channel_mode will be used by avdtp_choose_sbc_channel_mode (if supported by both endpoints) 691 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode); 692 693 void avdtp_set_preferred_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 694 695 /** 696 * @brief Get highest sampling frequency 697 * @param sampling_frequency_bitmap 698 * @return highest frequency or 0 699 */ 700 uint16_t avdtp_get_highest_sampling_frequency(uint8_t sampling_frequency_bitmap); 701 702 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap); 703 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap); 704 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap); 705 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap); 706 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap); 707 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value); 708 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value); 709 710 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint); 711 712 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint); 713 714 uint8_t avdtp_get_next_transaction_label(void); 715 716 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 717 uint8_t avdtp_start_stream_accept(uint16_t avdtp_cid, uint8_t local_seid); 718 uint8_t avdtp_start_stream_reject(uint16_t avdtp_cid, uint8_t local_seid); 719 #endif 720 721 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 722 void avdtp_init_fuzz(void); 723 void avdtp_packet_handler_fuzz(uint8_t *packet, uint16_t size); 724 #endif 725 726 #if defined __cplusplus 727 } 728 #endif 729 730 #endif // AVDTP_H 731