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 BAD_HEADER_FORMAT 0x01 78 79 // ACP to INT, Signal Response Payload Format Error Codes 80 #define BAD_LENGTH 0x11 81 #define BAD_ACP_SEID 0x12 82 #define SEP_IN_USE 0x13 83 #define SEP_NOT_IN_USE 0x14 84 #define BAD_SERV_CATEGORY 0x17 85 #define BAD_PAYLOAD_FORMAT 0x18 86 #define NOT_SUPPORTED_COMMAND 0x19 87 #define INVALID_CAPABILITIES 0x1A 88 89 // ACP to INT, Signal Response Transport Service Capabilities Error Codes 90 #define BAD_RECOVERY_TYPE 0x22 91 #define BAD_MEDIA_TRANSPORT_FORMAT 0x23 92 #define BAD_RECOVERY_FORMAT 0x25 93 #define BAD_ROHC_FORMAT 0x26 94 #define BAD_CP_FORMAT 0x27 95 #define BAD_MULTIPLEXING_FORMAT 0x28 96 #define UNSUPPORTED_CONFIGURATION 0x29 97 98 // ACP to INT, Procedure Error Codes 99 #define BAD_STATE 0x31 100 101 #define AVDTP_INVALID_SEP_SEID 0xFF 102 103 104 // Signal Identifier fields 105 typedef enum { 106 AVDTP_SI_NONE = 0x00, 107 AVDTP_SI_DISCOVER = 0x01, 108 AVDTP_SI_GET_CAPABILITIES, 109 AVDTP_SI_SET_CONFIGURATION, 110 AVDTP_SI_GET_CONFIGURATION, 111 AVDTP_SI_RECONFIGURE, //5 112 AVDTP_SI_OPEN, //6 113 AVDTP_SI_START, //7 114 AVDTP_SI_CLOSE, 115 AVDTP_SI_SUSPEND, 116 AVDTP_SI_ABORT, //10 117 AVDTP_SI_SECURITY_CONTROL, 118 AVDTP_SI_GET_ALL_CAPABILITIES, //12 119 AVDTP_SI_DELAYREPORT 120 } avdtp_signal_identifier_t; 121 122 typedef enum { 123 AVDTP_SINGLE_PACKET = 0, 124 AVDTP_START_PACKET , 125 AVDTP_CONTINUE_PACKET , 126 AVDTP_END_PACKET 127 } avdtp_packet_type_t; 128 129 typedef enum { 130 AVDTP_CMD_MSG = 0, 131 AVDTP_GENERAL_REJECT_MSG , 132 AVDTP_RESPONSE_ACCEPT_MSG , 133 AVDTP_RESPONSE_REJECT_MSG 134 } avdtp_message_type_t; 135 136 typedef enum { 137 AVDTP_AUDIO = 0, 138 AVDTP_VIDEO, 139 AVDTP_MULTIMEDIA 140 } avdtp_media_type_t; 141 142 typedef enum { 143 AVDTP_CODEC_SBC = 0x00, 144 AVDTP_CODEC_MPEG_1_2_AUDIO = 0x01, 145 AVDTP_CODEC_MPEG_2_4_AAC = 0x02, 146 AVDTP_CODEC_ATRAC_FAMILY = 0x04, 147 AVDTP_CODEC_NON_A2DP = 0xFF 148 } avdtp_media_codec_type_t; 149 150 typedef enum { 151 AVDTP_CONTENT_PROTECTION_DTCP = 0x0001, 152 AVDTP_CONTENT_PROTECTION_SCMS_T = 0x0002 153 } avdtp_content_protection_type_t; 154 155 typedef enum { 156 AVDTP_SOURCE = 0, 157 AVDTP_SINK 158 } avdtp_sep_type_t; 159 160 typedef enum { 161 AVDTP_ROLE_SOURCE = 0, 162 AVDTP_ROLE_SINK 163 } avdtp_role_t; 164 165 typedef enum { 166 AVDTP_SERVICE_CATEGORY_INVALID_0 = 0x00, 167 AVDTP_MEDIA_TRANSPORT = 0X01, 168 AVDTP_REPORTING, 169 AVDTP_RECOVERY, 170 AVDTP_CONTENT_PROTECTION, //4 171 AVDTP_HEADER_COMPRESSION, //5 172 AVDTP_MULTIPLEXING, //6 173 AVDTP_MEDIA_CODEC, //7 174 AVDTP_DELAY_REPORTING, //8 175 AVDTP_SERVICE_CATEGORY_INVALID_FF = 0xFF 176 } avdtp_service_category_t; 177 178 typedef struct { 179 uint8_t recovery_type; // 0x01 = RFC2733 180 uint8_t maximum_recovery_window_size; // 0x01 to 0x18, for a Transport Packet 181 uint8_t maximum_number_media_packets; // 0x01 to 0x18, The maximum number of media packets a specific parity code covers 182 } avdtp_recovery_capabilities_t; 183 184 typedef struct { 185 avdtp_media_type_t media_type; 186 avdtp_media_codec_type_t media_codec_type; 187 uint16_t media_codec_information_len; 188 uint8_t * media_codec_information; 189 } adtvp_media_codec_capabilities_t; 190 191 192 typedef struct { 193 uint16_t cp_type; 194 uint16_t cp_type_value_len; 195 uint8_t cp_type_value[AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN]; 196 } adtvp_content_protection_t; 197 198 typedef struct{ 199 uint8_t back_ch; // byte0 - bit 8; 0=Not Available/Not Used; 1=Available/In Use 200 uint8_t media; // byte0 - bit 7 201 uint8_t recovery; // byte0 - bit 6 202 } avdtp_header_compression_capabilities_t; 203 204 typedef struct{ 205 uint8_t fragmentation; // byte0 - bit 8, Allow Adaptation Layer Fragmentation, 0 no, 1 yes 206 // Request/indicate value of the Transport Session Identifier for a media, reporting, or recovery transport sessions, respectively 207 uint8_t transport_identifiers_num; 208 uint8_t transport_session_identifiers[3]; // byte1, upper 5bits, 0x01 to 0x1E 209 // Request/indicate value for TCID for a media, reporting, or transport session 210 uint8_t tcid[3]; // byte2 0x01 to 0x1E 211 } avdtp_multiplexing_mode_capabilities_t; 212 213 typedef struct{ 214 avdtp_recovery_capabilities_t recovery; 215 adtvp_media_codec_capabilities_t media_codec; 216 adtvp_content_protection_t content_protection; 217 avdtp_header_compression_capabilities_t header_compression; 218 avdtp_multiplexing_mode_capabilities_t multiplexing_mode; 219 } avdtp_capabilities_t; 220 221 typedef enum{ 222 AVDTP_SBC_48000 = 1, 223 AVDTP_SBC_44100 = 2, 224 AVDTP_SBC_32000 = 4, 225 AVDTP_SBC_16000 = 8 226 } avdtp_sbc_sampling_frequency_t; 227 228 typedef enum{ 229 AVDTP_SBC_JOINT_STEREO = 1, 230 AVDTP_SBC_STEREO = 2, 231 AVDTP_SBC_DUAL_CHANNEL = 4, 232 AVDTP_SBC_MONO = 8 233 } avdtp_sbc_channel_mode_t; 234 235 typedef enum{ 236 AVDTP_SBC_BLOCK_LENGTH_16 = 1, 237 AVDTP_SBC_BLOCK_LENGTH_12 = 2, 238 AVDTP_SBC_BLOCK_LENGTH_8 = 4, 239 AVDTP_SBC_BLOCK_LENGTH_4 = 8 240 } avdtp_sbc_block_length_t; 241 242 typedef enum{ 243 AVDTP_SBC_SUBBANDS_8 = 1, 244 AVDTP_SBC_SUBBANDS_4 = 2 245 } avdtp_sbc_subbands_t; 246 247 typedef enum{ 248 AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS = 1, 249 AVDTP_SBC_ALLOCATION_METHOD_SNR = 2 250 } avdtp_sbc_allocation_method_t; 251 252 typedef struct { 253 uint8_t fragmentation; 254 uint8_t starting_packet; // of fragmented SBC frame 255 uint8_t last_packet; // of fragmented SBC frame 256 uint8_t num_frames; 257 } avdtp_sbc_codec_header_t; 258 259 // typedef struct { 260 // uint8_t transaction_label; 261 // avdtp_packet_type_t packet_type; 262 // avdtp_message_type_t message_type; 263 // uint8_t signal_identifier; 264 // } avdtp_signaling_packet_header_t; 265 266 typedef struct { 267 uint8_t version; 268 uint8_t padding; 269 uint8_t extension; 270 uint8_t csrc_count; 271 uint8_t marker; 272 uint8_t payload_type; 273 274 uint16_t sequence_number; 275 uint32_t timestamp; 276 uint32_t synchronization_source; 277 278 uint32_t csrc_list[AVDTP_MAX_CSRC_NUM]; 279 } avdtp_media_packet_header_t; 280 281 typedef enum { 282 AVDTP_BASIC_SERVICE_MODE = 0, 283 AVDTP_MULTIPLEXING_SERVICE_MODE 284 } avdtp_service_mode_t; 285 286 typedef enum { 287 AVDTP_STREAM_ENDPOINT_IDLE = 0, 288 AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE, 289 AVDTP_STREAM_ENDPOINT_CONFIGURED, 290 291 AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM, 292 AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM, 293 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED, 294 295 AVDTP_STREAM_ENDPOINT_OPENED, 296 AVDTP_STREAM_ENDPOINT_STREAMING, 297 298 AVDTP_STREAM_ENDPOINT_CLOSING, 299 AVDTP_STREAM_ENDPOINT_ABORTING, 300 AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED 301 } avdtp_stream_endpoint_state_t; 302 303 typedef enum { 304 AVDTP_INITIATOR_STREAM_CONFIG_IDLE = 0, 305 AVDTP_INITIATOR_W2_SET_CONFIGURATION, 306 AVDTP_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID, 307 AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID, 308 309 AVDTP_INITIATOR_W2_OPEN_STREAM, 310 311 AVDTP_INITIATOR_W2_STREAMING_ABORT, 312 AVDTP_INITIATOR_FRAGMENTATED_COMMAND, 313 AVDTP_INITIATOR_W4_ANSWER 314 } avdtp_initiator_stream_endpoint_state_t; 315 316 typedef enum { 317 AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE = 0, 318 AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES, 319 AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES, 320 AVDTP_ACCEPTOR_W2_ANSWER_DELAY_REPORT, 321 AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION, 322 AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE, 323 AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION, 324 AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM, 325 AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM, 326 AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM, 327 AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM, 328 AVDTP_ACCEPTOR_W2_SUSPEND_STREAM_WITH_SEID, 329 AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM, 330 AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 331 AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 332 AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD, 333 AVDTP_ACCEPTOR_STREAMING 334 } avdtp_acceptor_stream_endpoint_state_t; 335 336 typedef struct { 337 uint8_t seid; // 0x01 – 0x3E, 6bit 338 uint8_t in_use; // 1 bit, 0 - not in use, 1 - in use 339 avdtp_media_type_t media_type; // 4 bit 340 avdtp_sep_type_t type; // 1 bit, 0 - SRC, 1 - SNK 341 342 uint16_t registered_service_categories; 343 avdtp_capabilities_t capabilities; 344 345 uint16_t configured_service_categories; 346 avdtp_capabilities_t configuration; 347 } avdtp_sep_t; 348 349 350 typedef enum { 351 AVDTP_SIGNALING_CONNECTION_IDLE = 0, 352 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK, 353 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE, 354 AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE, 355 AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE, 356 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED, 357 AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY, 358 AVDTP_SIGNALING_CONNECTION_OPENED, 359 AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED 360 } avdtp_connection_state_t; 361 362 typedef enum { 363 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE = 0, 364 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS, 365 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE, 366 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE, 367 AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE 368 } avdtp_acceptor_connection_state_t; 369 370 typedef enum { 371 AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE = 0, 372 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS, 373 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES, 374 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES, 375 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES, 376 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES, 377 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION, 378 AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT, 379 AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER 380 } avdtp_initiator_connection_state_t; 381 382 typedef struct { 383 uint8_t command[200]; 384 uint16_t size; 385 uint16_t offset; 386 uint8_t acp_seid; 387 uint8_t int_seid; 388 uint16_t transaction_label; 389 uint16_t num_packets; 390 avdtp_signal_identifier_t signal_identifier; 391 avdtp_message_type_t message_type; 392 avdtp_packet_type_t packet_type; 393 } avdtp_signaling_packet_t; 394 395 typedef enum { 396 AVDTP_CONFIGURATION_STATE_IDLE = 0, 397 AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED, 398 AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED, 399 AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED, 400 AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED, 401 } avtdp_configuration_state_t; 402 403 typedef enum { 404 A2DP_IDLE = 0, 405 A2DP_W4_CONNECTED, 406 A2DP_CONNECTED, 407 A2DP_DISCOVER_SEPS, 408 A2DP_GET_CAPABILITIES, 409 A2DP_W2_GET_ALL_CAPABILITIES, //5 410 A2DP_SET_CONFIGURATION, 411 A2DP_W4_GET_CONFIGURATION, 412 A2DP_W4_SET_CONFIGURATION, 413 A2DP_CONFIGURED, 414 A2DP_W2_SUSPEND_STREAM_WITH_SEID, //10 415 A2DP_W2_RECONFIGURE_WITH_SEID, 416 A2DP_W2_OPEN_STREAM_WITH_SEID, 417 A2DP_W4_OPEN_STREAM_WITH_SEID, 418 A2DP_W2_START_STREAM_WITH_SEID, 419 A2DP_W2_ABORT_STREAM_WITH_SEID, //15 420 A2DP_W2_STOP_STREAM_WITH_SEID, 421 A2DP_STREAMING_OPENED 422 } a2dp_state_t; 423 424 425 typedef struct { 426 btstack_linked_item_t item; 427 bd_addr_t remote_addr; 428 429 uint16_t avdtp_cid; 430 hci_con_handle_t con_handle; 431 432 // SDP results 433 uint16_t avdtp_l2cap_psm; 434 uint16_t avdtp_version; 435 bool sink_supported; 436 bool source_supported; 437 438 uint16_t l2cap_signaling_cid; 439 uint16_t l2cap_mtu; 440 441 avdtp_connection_state_t state; 442 avdtp_acceptor_connection_state_t acceptor_connection_state; 443 avdtp_initiator_connection_state_t initiator_connection_state; 444 445 // used to reassemble fragmented commands 446 avdtp_signaling_packet_t acceptor_signaling_packet; 447 448 // used to prepare outgoing signaling packets 449 avdtp_signaling_packet_t initiator_signaling_packet; 450 451 uint8_t initiator_local_seid; 452 uint8_t initiator_remote_seid; 453 454 uint8_t acceptor_local_seid; 455 456 uint16_t delay_ms; 457 458 // for repeating the set_configuration 459 void * active_stream_endpoint; 460 461 uint8_t initiator_transaction_label; 462 uint8_t acceptor_transaction_label; 463 bool wait_to_send_acceptor; 464 bool wait_to_send_initiator; 465 466 uint8_t suspended_seids[AVDTP_MAX_NUM_SEPS]; 467 uint8_t num_suspended_seids; 468 469 uint8_t reject_service_category; 470 avdtp_signal_identifier_t reject_signal_identifier; 471 uint8_t error_code; 472 473 // configuration state machine 474 avtdp_configuration_state_t configuration_state; 475 // btstack_timer_source_t configuration_timer; 476 477 bool incoming_declined; 478 btstack_timer_source_t retry_timer; 479 480 bool a2dp_source_discover_seps; 481 uint8_t supported_codecs_bitmap; 482 483 } avdtp_connection_t; 484 485 486 typedef struct avdtp_stream_endpoint { 487 btstack_linked_item_t item; 488 489 // original capabilities configured via avdtp_register_x_category 490 avdtp_sep_t sep; 491 492 // media codec configuration 493 uint16_t media_codec_configuration_len; 494 uint8_t * media_codec_configuration_info; 495 496 avdtp_sep_t remote_sep; 497 hci_con_handle_t media_con_handle; 498 uint16_t l2cap_media_cid; 499 uint16_t l2cap_reporting_cid; 500 uint16_t l2cap_recovery_cid; 501 502 avdtp_stream_endpoint_state_t state; 503 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state; 504 avdtp_initiator_stream_endpoint_state_t initiator_config_state; 505 a2dp_state_t a2dp_state; 506 // active connection 507 avdtp_connection_t * connection; 508 509 // currently active remote seid 510 avdtp_capabilities_t remote_capabilities; 511 uint16_t remote_capabilities_bitmap; 512 513 uint16_t remote_configuration_bitmap; 514 avdtp_capabilities_t remote_configuration; 515 516 // temporary SBC config used by A2DP Source 517 avdtp_media_codec_type_t media_codec_type; 518 avdtp_media_type_t media_type; 519 uint8_t media_codec_sbc_info[4]; 520 521 // preferred sampling frequency 522 uint32_t preferred_sampling_frequency; 523 524 // register request for media L2cap connection release 525 uint8_t media_disconnect; 526 uint8_t media_connect; 527 uint8_t start_stream; 528 uint8_t close_stream; 529 uint8_t request_can_send_now; 530 uint8_t abort_stream; 531 uint8_t suspend_stream; 532 uint16_t sequence_number; 533 } avdtp_stream_endpoint_t; 534 535 typedef struct { 536 uint32_t fill_audio_ring_buffer_timeout_ms; 537 uint32_t time_audio_data_sent; // msstream 538 uint32_t acc_num_missed_samples; 539 uint32_t samples_ready; 540 btstack_timer_source_t fill_audio_ring_buffer_timer; 541 btstack_ring_buffer_t sbc_ring_buffer; 542 543 int reconfigure; 544 int num_channels; 545 int sampling_frequency; 546 int channel_mode; 547 int block_length; 548 int subbands; 549 int allocation_method; 550 int min_bitpool_value; 551 int max_bitpool_value; 552 avdtp_stream_endpoint_t * local_stream_endpoint; 553 uint8_t active_remote_sep_index; 554 } avdtp_stream_endpoint_context_t; 555 556 void avdtp_init(void); 557 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid); 558 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid); 559 btstack_linked_list_t * avdtp_get_connections(void); 560 btstack_linked_list_t * avdtp_get_stream_endpoints(void); 561 562 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid); 563 564 btstack_packet_handler_t avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint); 565 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size); 566 void avdtp_emit_source(uint8_t * packet, uint16_t size); 567 568 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint); 569 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 570 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint); 571 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets); 572 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); 573 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery); 574 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, uint8_t * media_codec_info, uint16_t media_codec_info_len); 575 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation); 576 577 // sink only 578 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)); 579 580 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 581 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type); 582 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint); 583 584 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid); 585 uint8_t avdtp_disconnect(uint16_t avdtp_cid); 586 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback); 587 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback); 588 589 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid); 590 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid); 591 uint8_t avdtp_stop_stream (uint16_t avdtp_cid, uint8_t local_seid); 592 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid); 593 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid); 594 595 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid); 596 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 597 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid); 598 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid); 599 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); 600 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); 601 602 // frequency will be used by avdtp_choose_sbc_sampling_frequency if supported by both endpoints 603 void avdtp_set_preferred_sampling_frequeny(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 604 // 605 void avdtp_set_preferred_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency); 606 607 uint8_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap); 608 uint8_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap); 609 uint8_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap); 610 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap); 611 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap); 612 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value); 613 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value); 614 615 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint); 616 617 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint); 618 619 uint16_t avdtp_get_next_transaction_label(void); 620 621 #if defined __cplusplus 622 } 623 #endif 624 625 #endif // AVDTP_H 626