1 2 /* 3 * Copyright (C) 2016 BlueKitchen GmbH 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the copyright holders nor the names of 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 4. Any redistribution, use, or modification is done solely for 18 * personal benefit and not for any commercial purpose or for 19 * monetary gain. 20 * 21 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 25 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 31 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Please inquire about commercial licensing options at 35 * [email protected] 36 * 37 */ 38 39 /** 40 * Supported use cases: 41 * - single incoming connection: sep discovery starts and stream will get setup if remote sink sep with SBC is found 42 * - single outgoing connection: see above 43 * - outgoing and incoming connection to same device: 44 * - if outgoing is triggered first, incoming will get ignored. 45 * - if incoming starts first, start ougoing will fail, but incoming will succeed. 46 * - outgoing and incoming connections to different devices: 47 * - if outgoing is first, incoming gets ignored. 48 * - if incoming starts first SEP discovery will get stopped and outgoing will succeed. 49 */ 50 51 #define BTSTACK_FILE__ "a2dp_source.c" 52 53 #include <stdint.h> 54 #include <string.h> 55 56 #include "bluetooth_psm.h" 57 #include "bluetooth_sdp.h" 58 #include "btstack_debug.h" 59 #include "btstack_event.h" 60 #include "classic/a2dp_source.h" 61 #include "classic/avdtp_source.h" 62 #include "classic/avdtp_util.h" 63 #include "classic/sdp_util.h" 64 #include "l2cap.h" 65 66 #define AVDTP_MAX_SEP_NUM 10 67 #define A2DP_SET_CONFIG_DELAY_MS 150 68 69 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 70 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 71 72 static btstack_timer_source_t a2dp_source_set_config_timer; 73 74 // 75 static bool outgoing_active; 76 77 // discover remote seps 78 static a2dp_state_t a2dp_source_state = A2DP_IDLE; 79 static uint16_t a2dp_source_cid; 80 static uint16_t num_remote_seps = 0; 81 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 82 83 static bool stream_endpoint_configured = false; 84 85 static avdtp_stream_endpoint_context_t sc; 86 static btstack_packet_handler_t a2dp_source_packet_handler_user; 87 88 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 89 static void a2dp_discover_seps_with_next_waiting_connection(void); 90 91 static void a2dp_source_streaming_emit_connection_failed(avdtp_connection_t * connection, uint8_t local_seid, uint8_t status) { 92 uint8_t event[14]; 93 int pos = 0; 94 event[pos++] = HCI_EVENT_A2DP_META; 95 event[pos++] = sizeof(event) - 2; 96 event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 97 little_endian_store_16(event, pos, connection->avdtp_cid); 98 pos += 2; 99 reverse_bd_addr(connection->remote_addr, &event[pos]); 100 pos += 6; 101 event[pos++] = local_seid; 102 event[pos++] = 0; 103 event[pos++] = status; 104 105 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 106 } 107 108 void a2dp_source_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 109 uint8_t* attribute; 110 de_create_sequence(service); 111 112 // 0x0000 "Service Record Handle" 113 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 114 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 115 116 // 0x0001 "Service Class ID List" 117 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 118 attribute = de_push_sequence(service); 119 { 120 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 121 } 122 de_pop_sequence(service, attribute); 123 124 // 0x0004 "Protocol Descriptor List" 125 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 126 attribute = de_push_sequence(service); 127 { 128 uint8_t* l2cpProtocol = de_push_sequence(attribute); 129 { 130 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 131 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 132 } 133 de_pop_sequence(attribute, l2cpProtocol); 134 135 uint8_t* avProtocol = de_push_sequence(attribute); 136 { 137 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 138 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 139 } 140 de_pop_sequence(attribute, avProtocol); 141 } 142 de_pop_sequence(service, attribute); 143 144 // 0x0005 "Public Browse Group" 145 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 146 attribute = de_push_sequence(service); 147 { 148 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 149 } 150 de_pop_sequence(service, attribute); 151 152 // 0x0009 "Bluetooth Profile Descriptor List" 153 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 154 attribute = de_push_sequence(service); 155 { 156 uint8_t *a2dProfile = de_push_sequence(attribute); 157 { 158 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 159 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 160 } 161 de_pop_sequence(attribute, a2dProfile); 162 } 163 de_pop_sequence(service, attribute); 164 165 166 // 0x0100 "Service Name" 167 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 168 if (service_name){ 169 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 170 } else { 171 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 172 } 173 174 // 0x0100 "Provider Name" 175 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 176 if (service_provider_name){ 177 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 178 } else { 179 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 180 } 181 182 // 0x0311 "Supported Features" 183 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 184 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 185 } 186 187 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 188 uint8_t event[7]; 189 int pos = 0; 190 event[pos++] = HCI_EVENT_A2DP_META; 191 event[pos++] = sizeof(event) - 2; 192 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 193 little_endian_store_16(event, pos, cid); 194 pos += 2; 195 event[pos++] = local_seid; 196 event[pos++] = status; 197 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 198 } 199 200 static void a2dp_source_discover_stream_endpoints(uint16_t avdtp_cid){ 201 a2dp_source_cid = avdtp_cid; 202 avdtp_source_discover_stream_endpoints(avdtp_cid); 203 } 204 205 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 206 if (stream_endpoint_configured) return; 207 208 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 209 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 210 211 if (connection == NULL || connection->a2dp_source_discover_seps == false) { 212 a2dp_discover_seps_with_next_waiting_connection(); 213 return; 214 } 215 216 a2dp_source_discover_stream_endpoints(avdtp_cid); 217 } 218 219 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 220 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 221 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 222 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 223 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 224 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 225 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 226 } 227 228 static void a2dp_source_set_config_timer_stop(void){ 229 log_info("a2dp_source_set_config_timer_stop"); 230 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 231 } 232 233 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 234 a2dp_source_state = A2DP_DISCOVER_SEPS; 235 sc.active_remote_sep_index = 0; 236 num_remote_seps = 0; 237 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 238 connection->a2dp_source_discover_seps = false; 239 240 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 241 if (outgoing_active && (a2dp_source_cid == connection->avdtp_cid)){ 242 log_info("A2DP signaling connection: discover seps"); 243 a2dp_source_discover_stream_endpoints(connection->avdtp_cid); 244 } else { 245 log_info("A2DP signaling connection: wait a bit, then discover seps"); 246 a2dp_source_set_config_timer_start(connection->avdtp_cid); 247 } 248 } 249 250 static void a2dp_discover_seps_with_next_waiting_connection(void){ 251 a2dp_source_state = A2DP_IDLE; 252 253 btstack_linked_list_iterator_t it; 254 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 255 while (btstack_linked_list_iterator_has_next(&it)){ 256 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 257 if (!next_connection->a2dp_source_discover_seps) continue; 258 a2dp_start_discovering_seps(next_connection); 259 } 260 } 261 262 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 263 UNUSED(channel); 264 UNUSED(size); 265 266 uint16_t cid; 267 avdtp_connection_t * connection; 268 269 uint8_t signal_identifier; 270 uint8_t status; 271 uint8_t local_seid; 272 uint8_t remote_seid; 273 bd_addr_t address; 274 275 if (packet_type != HCI_EVENT_PACKET) return; 276 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 277 278 switch (packet[2]){ 279 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 280 if (sc.local_stream_endpoint == NULL) return; 281 282 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 283 connection = avdtp_get_connection_for_avdtp_cid(cid); 284 btstack_assert(connection != NULL); 285 286 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 287 288 status = avdtp_subevent_signaling_connection_established_get_status(packet); 289 if (status != ERROR_CODE_SUCCESS){ 290 // notify about connection error only if we're initiator 291 if (outgoing_active && (a2dp_source_cid == cid)){ 292 log_info("A2DP source signaling connection failed status %d", status); 293 outgoing_active = false; 294 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 295 } 296 break; 297 } 298 log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid); 299 300 // notify app 301 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 302 303 // we already have a valid setup 304 if (stream_endpoint_configured) return; 305 306 // start discover seps now if: 307 // - outgoing active: signaling for outgoing connection 308 // - outgoing not active: incoming connection and no sep discover ongoing 309 if ((outgoing_active && (a2dp_source_cid == cid)) || (!outgoing_active && (a2dp_source_state == A2DP_IDLE))){ 310 a2dp_start_discovering_seps(connection); 311 } else { 312 // post-pone sep discovery 313 connection->a2dp_source_discover_seps = true; 314 } 315 break; 316 317 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 318 cid = avdtp_subevent_signaling_sep_found_get_avdtp_cid(packet); 319 if (a2dp_source_cid != cid) break; 320 if (a2dp_source_state == A2DP_DISCOVER_SEPS) { 321 avdtp_sep_t sep; 322 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 323 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 324 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 325 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 326 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s, index %d", 327 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", 328 num_remote_seps); 329 if (sep.type == AVDTP_SINK) { 330 remote_seps[num_remote_seps++] = sep; 331 } 332 } 333 break; 334 335 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 336 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 337 if (a2dp_source_cid != cid) break; 338 if (a2dp_source_state != A2DP_DISCOVER_SEPS) break; 339 340 connection = avdtp_get_connection_for_avdtp_cid(cid); 341 btstack_assert(connection != NULL); 342 343 if (num_remote_seps > 0){ 344 a2dp_source_state = A2DP_GET_CAPABILITIES; 345 connection->supported_codecs_bitmap = 0; 346 sc.active_remote_sep_index = 0; 347 } else { 348 if (outgoing_active){ 349 outgoing_active = false; 350 connection = avdtp_get_connection_for_avdtp_cid(cid); 351 btstack_assert(connection != NULL); 352 a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 353 } 354 355 // continue 356 a2dp_discover_seps_with_next_waiting_connection(); 357 } 358 break; 359 360 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 361 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 362 if (a2dp_source_cid != cid) break; 363 if (a2dp_source_state == A2DP_GET_CAPABILITIES) { 364 365 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 366 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 367 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 368 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seps[sc.active_remote_sep_index].seid ); 369 370 connection = avdtp_get_connection_for_avdtp_cid(cid); 371 btstack_assert(connection != NULL); 372 373 uint8_t sampling_frequency = avdtp_choose_sbc_sampling_frequency(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet)); 374 uint8_t channel_mode = avdtp_choose_sbc_channel_mode(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet)); 375 uint8_t block_length = avdtp_choose_sbc_block_length(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_block_length_bitmap(packet)); 376 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 377 378 uint8_t allocation_method = avdtp_choose_sbc_allocation_method(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet)); 379 uint8_t max_bitpool_value = avdtp_choose_sbc_max_bitpool_value(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet)); 380 uint8_t min_bitpool_value = avdtp_choose_sbc_min_bitpool_value(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet)); 381 382 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 383 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 384 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 385 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 386 387 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 388 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 389 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 390 391 // suitable Sink SEP found, configure SEP 392 a2dp_source_state = A2DP_SET_CONFIGURATION; 393 connection->supported_codecs_bitmap |= (1 << AVDTP_CODEC_SBC); 394 } 395 break; 396 397 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 398 log_info("received non SBC codec. not implemented"); 399 break; 400 401 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 402 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, remote seid %d", avdtp_subevent_signaling_media_transport_capability_get_remote_seid(packet)); 403 break; 404 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 405 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 406 break; 407 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 408 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 409 break; 410 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 411 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY, remote seid %d", avdtp_subevent_signaling_content_protection_capability_get_remote_seid(packet)); 412 break; 413 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 414 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY, remote seid %d", avdtp_subevent_signaling_header_compression_capability_get_remote_seid(packet)); 415 break; 416 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 417 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 418 break; 419 420 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 421 cid = avdtp_subevent_signaling_delay_reporting_capability_get_avdtp_cid(packet); 422 if (a2dp_source_cid != cid) break; 423 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 424 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 425 break; 426 427 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 428 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 429 if (a2dp_source_cid != cid) break; 430 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 431 432 // endpoint was not suitable, check next one 433 sc.active_remote_sep_index++; 434 if (sc.active_remote_sep_index >= num_remote_seps){ 435 // we didn't find a suitable SBC stream endpoint, sorry. 436 if (outgoing_active){ 437 outgoing_active = false; 438 connection = avdtp_get_connection_for_avdtp_cid(cid); 439 btstack_assert(connection != NULL); 440 a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 441 } 442 a2dp_discover_seps_with_next_waiting_connection(); 443 } 444 break; 445 446 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 447 cid = avdtp_subevent_signaling_delay_report_get_avdtp_cid(packet); 448 if (a2dp_source_cid != cid) break; 449 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 450 break; 451 452 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 453 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 454 if (a2dp_source_cid != cid) break; 455 456 switch (a2dp_source_state){ 457 case A2DP_W4_SET_CONFIGURATION: 458 // discovery and config of remote sink sep successful 459 stream_endpoint_configured = true; 460 a2dp_source_set_config_timer_stop(); 461 462 a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 463 break; 464 case A2DP_W4_RECONFIGURE_WITH_SEID: 465 a2dp_source_state = A2DP_STREAMING_OPENED; 466 break; 467 default: 468 return; 469 } 470 471 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 472 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 473 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 474 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 475 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 476 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 477 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 478 479 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u., remote seid %d", sc.sampling_frequency, sc.max_bitpool_value, avdtp_subevent_signaling_media_codec_sbc_configuration_get_remote_seid(packet)); 480 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 481 break; 482 483 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 484 break; 485 486 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 487 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 488 break; 489 490 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 491 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 492 if (a2dp_source_cid != cid) break; 493 if (a2dp_source_state != A2DP_W4_OPEN_STREAM_WITH_SEID) break; 494 495 if (outgoing_active){ 496 outgoing_active = false; 497 } 498 499 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 500 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 501 status = avdtp_subevent_streaming_connection_established_get_status(packet); 502 if (status != ERROR_CODE_SUCCESS){ 503 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 504 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 505 break; 506 } 507 508 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 509 a2dp_source_state = A2DP_STREAMING_OPENED; 510 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 511 break; 512 513 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 514 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 515 if (a2dp_source_cid != cid) break; 516 517 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) break; 518 519 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 520 521 log_info("A2DP cmd %s accepted, global state %x, is_initiator %u, cid 0x%2x, local seid %d", avdtp_si2str(signal_identifier), a2dp_source_state, 522 avdtp_subevent_signaling_accept_get_is_initiator(packet), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 523 524 switch (a2dp_source_state){ 525 case A2DP_GET_CAPABILITIES: 526 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 527 log_info("A2DP get capabilities for remote seid %d", remote_seid); 528 avdtp_source_get_capabilities(cid, remote_seid); 529 return; 530 531 case A2DP_SET_CONFIGURATION: 532 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 533 log_info("A2DP initiate set configuration locally and wait for response ... local seid %d, remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid); 534 a2dp_source_state = A2DP_W4_SET_CONFIGURATION; 535 avdtp_source_set_configuration(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid, sc.local_stream_endpoint->remote_configuration_bitmap, sc.local_stream_endpoint->remote_configuration); 536 return; 537 538 case A2DP_W2_OPEN_STREAM_WITH_SEID: 539 log_info("A2DP open stream ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 540 a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 541 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 542 break; 543 544 case A2DP_W2_RECONFIGURE_WITH_SEID: 545 log_info("A2DP reconfigured ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 546 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 547 a2dp_source_state = A2DP_W4_RECONFIGURE_WITH_SEID; 548 break; 549 550 case A2DP_STREAMING_OPENED: 551 switch (signal_identifier){ 552 case AVDTP_SI_START: 553 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 554 break; 555 case AVDTP_SI_SUSPEND: 556 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 557 break; 558 case AVDTP_SI_ABORT: 559 case AVDTP_SI_CLOSE: 560 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 561 break; 562 default: 563 break; 564 } 565 break; 566 567 default: 568 break; 569 } 570 break; 571 572 case AVDTP_SUBEVENT_SIGNALING_REJECT: 573 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 574 if (a2dp_source_cid != cid) break; 575 if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break; 576 577 a2dp_source_state = A2DP_CONNECTED; 578 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 579 break; 580 581 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 582 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 583 if (a2dp_source_cid != cid) break; 584 if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break; 585 586 a2dp_source_state = A2DP_CONNECTED; 587 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 588 break; 589 590 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 591 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 592 if (a2dp_source_cid != cid) break; 593 594 a2dp_source_state = A2DP_CONFIGURED; 595 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 596 break; 597 598 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 599 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 600 // connect/release are passed on to app 601 if (a2dp_source_cid == cid){ 602 stream_endpoint_configured = false; 603 a2dp_source_state = A2DP_IDLE; 604 } 605 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 606 break; 607 608 default: 609 break; 610 } 611 } 612 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 613 btstack_assert(callback != NULL); 614 615 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 616 a2dp_source_packet_handler_user = callback; 617 } 618 619 void a2dp_source_init(void){ 620 avdtp_source_init(); 621 } 622 623 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 624 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 625 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 626 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 627 if (!local_stream_endpoint){ 628 return NULL; 629 } 630 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 631 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 632 codec_capabilities, codec_capabilities_len); 633 634 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 635 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 636 sc.local_stream_endpoint = local_stream_endpoint; 637 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 638 return local_stream_endpoint; 639 } 640 641 void a2dp_source_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 642 avdtp_source_finalize_stream_endpoint(stream_endpoint); 643 } 644 645 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 646 if (outgoing_active || stream_endpoint_configured) { 647 return ERROR_CODE_COMMAND_DISALLOWED; 648 } 649 650 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 651 if (!sc.local_stream_endpoint){ 652 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 653 } 654 655 uint16_t outgoing_cid; 656 657 outgoing_active = true; 658 uint8_t status = avdtp_source_connect(remote_addr, &outgoing_cid); 659 if (status != ERROR_CODE_SUCCESS) { 660 // if there's already a connection for for remote addr, avdtp_source_connect fails, 661 // but the stream will get set-up nevertheless 662 outgoing_active = false; 663 return status; 664 } 665 666 // stop sep discovery for other 667 if (a2dp_source_state != A2DP_IDLE){ 668 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_source_cid); 669 if (connection != NULL){ 670 // sdp discovery has started: post-pone action, reserve sep discovery mechanism 671 connection->a2dp_source_discover_seps = true; 672 } 673 } 674 675 // setup state 676 a2dp_source_state = A2DP_W4_CONNECTED; 677 a2dp_source_cid = outgoing_cid; 678 *avdtp_cid = outgoing_cid; 679 680 return ERROR_CODE_SUCCESS; 681 } 682 683 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 684 return avdtp_disconnect(avdtp_cid); 685 } 686 687 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 688 btstack_assert(sc.local_stream_endpoint != NULL); 689 690 if (a2dp_source_cid != avdtp_cid){ 691 return ERROR_CODE_COMMAND_DISALLOWED; 692 } 693 694 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 695 if (connection == NULL){ 696 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 697 } 698 699 if (a2dp_source_state != A2DP_STREAMING_OPENED) { 700 return ERROR_CODE_COMMAND_DISALLOWED; 701 } 702 703 log_info("a2dp_source_reconfigure_stream"); 704 705 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 706 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 707 4); 708 709 // update sampling frequency 710 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 711 switch (sampling_frequency){ 712 case 48000: 713 config |= (AVDTP_SBC_48000 << 4); 714 break; 715 case 44100: 716 config |= (AVDTP_SBC_44100 << 4); 717 break; 718 case 32000: 719 config |= (AVDTP_SBC_32000 << 4); 720 break; 721 case 16000: 722 config |= (AVDTP_SBC_16000 << 4); 723 break; 724 default: 725 log_error("Unsupported sampling frequency %u", sampling_frequency); 726 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 727 } 728 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 729 730 avdtp_capabilities_t new_configuration; 731 new_configuration.media_codec.media_type = AVDTP_AUDIO; 732 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 733 new_configuration.media_codec.media_codec_information_len = 4; 734 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 735 736 // start reconfigure 737 a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 738 739 return avdtp_source_reconfigure( 740 avdtp_cid, 741 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 742 sc.local_stream_endpoint->remote_sep.seid, 743 1 << AVDTP_MEDIA_CODEC, 744 new_configuration 745 ); 746 } 747 748 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 749 return avdtp_start_stream(avdtp_cid, local_seid); 750 } 751 752 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 753 return avdtp_suspend_stream(avdtp_cid, local_seid); 754 } 755 756 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 757 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 758 } 759 760 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 761 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 762 } 763 764 int a2dp_source_stream_send_media_payload(uint16_t avdtp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){ 765 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 766 } 767