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 static bool sep_found_w2_set_configuration = false; 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 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL); 211 212 if (connection == NULL) { 213 log_info("a2dp_discover_seps_with_next_waiting_connection"); 214 a2dp_discover_seps_with_next_waiting_connection(); 215 return; 216 } 217 218 a2dp_source_discover_stream_endpoints(avdtp_cid); 219 } 220 221 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 222 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 223 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 224 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 225 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 226 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 227 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 228 } 229 230 static void a2dp_source_set_config_timer_stop(void){ 231 log_info("a2dp_source_set_config_timer_stop"); 232 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 233 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL); 234 } 235 236 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 237 a2dp_source_state = A2DP_DISCOVER_SEPS; 238 sc.active_remote_sep_index = 0; 239 num_remote_seps = 0; 240 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 241 connection->a2dp_source_discover_seps = false; 242 243 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 244 if (outgoing_active && (a2dp_source_cid == connection->avdtp_cid)){ 245 log_info("discover seps"); 246 a2dp_source_discover_stream_endpoints(connection->avdtp_cid); 247 } else { 248 log_info("wait a bit, then discover seps"); 249 a2dp_source_set_config_timer_start(connection->avdtp_cid); 250 } 251 } 252 253 static void a2dp_discover_seps_with_next_waiting_connection(void){ 254 a2dp_source_state = A2DP_IDLE; 255 256 btstack_linked_list_iterator_t it; 257 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 258 while (btstack_linked_list_iterator_has_next(&it)){ 259 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 260 if (!next_connection->a2dp_source_discover_seps) continue; 261 a2dp_start_discovering_seps(next_connection); 262 } 263 } 264 265 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 266 UNUSED(channel); 267 UNUSED(size); 268 269 uint16_t cid; 270 avdtp_connection_t * connection; 271 272 uint8_t signal_identifier; 273 uint8_t status; 274 uint8_t local_seid; 275 uint8_t remote_seid; 276 bd_addr_t address; 277 278 if (packet_type != HCI_EVENT_PACKET) return; 279 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 280 281 switch (packet[2]){ 282 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 283 if (sc.local_stream_endpoint == NULL) return; 284 285 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 286 connection = avdtp_get_connection_for_avdtp_cid(cid); 287 btstack_assert(connection != NULL); 288 289 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 290 291 status = avdtp_subevent_signaling_connection_established_get_status(packet); 292 if (status != ERROR_CODE_SUCCESS){ 293 // notify about connection error only if we're initiator 294 if (outgoing_active && (a2dp_source_cid == cid)){ 295 log_info("A2DP source signaling connection failed status 0x%02x", status); 296 outgoing_active = false; 297 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 298 } 299 break; 300 } 301 log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid); 302 303 // notify app 304 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 305 306 // we already have a valid setup 307 if (stream_endpoint_configured) return; 308 309 // start discover seps now if: 310 // - outgoing active: signaling for outgoing connection 311 // - outgoing not active: incoming connection and no sep discover ongoing 312 313 log_info("outgoing_active %d, current avdtp cid 0x%02x, a2dp_source_state %d", outgoing_active, cid, a2dp_source_state); 314 if ((outgoing_active && (a2dp_source_cid == cid)) || (!outgoing_active && (a2dp_source_state == A2DP_IDLE))){ 315 a2dp_start_discovering_seps(connection); 316 } else { 317 // post-pone sep discovery 318 connection->a2dp_source_discover_seps = true; 319 } 320 break; 321 322 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 323 cid = avdtp_subevent_signaling_sep_found_get_avdtp_cid(packet); 324 if (a2dp_source_cid != cid) break; 325 if (a2dp_source_state == A2DP_DISCOVER_SEPS) { 326 avdtp_sep_t sep; 327 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 328 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 329 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 330 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 331 log_info("A2DP Found sep: remote seid 0x%02x, in_use %d, media type %d, sep type %s, index %d", 332 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", 333 num_remote_seps); 334 if (sep.type == AVDTP_SINK) { 335 remote_seps[num_remote_seps++] = sep; 336 } 337 } 338 break; 339 340 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 341 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 342 if (a2dp_source_cid != cid) break; 343 if (a2dp_source_state != A2DP_DISCOVER_SEPS) break; 344 345 connection = avdtp_get_connection_for_avdtp_cid(cid); 346 btstack_assert(connection != NULL); 347 348 if (num_remote_seps > 0){ 349 a2dp_source_state = A2DP_GET_CAPABILITIES; 350 connection->supported_codecs_bitmap = 0; 351 sc.active_remote_sep_index = 0; 352 } else { 353 if (outgoing_active){ 354 outgoing_active = false; 355 connection = avdtp_get_connection_for_avdtp_cid(cid); 356 btstack_assert(connection != NULL); 357 a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 358 } 359 360 // continue 361 a2dp_discover_seps_with_next_waiting_connection(); 362 } 363 break; 364 365 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 366 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 367 if (a2dp_source_cid != cid) break; 368 if (a2dp_source_state == A2DP_GET_CAPABILITIES) { 369 370 log_info("A2DP received SBC capability, received: remote seid 0x%02x (expected: remote seid 0x%02x)", 371 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), remote_seps[sc.active_remote_sep_index].seid); 372 373 connection = avdtp_get_connection_for_avdtp_cid(cid); 374 btstack_assert(connection != NULL); 375 376 // choose SBC config params 377 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)); 378 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)); 379 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)); 380 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 381 382 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)); 383 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)); 384 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)); 385 386 // set media configuration 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 // select reserved SBC config buffer 392 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->media_codec_sbc_info; 393 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 4; 394 395 // store SBC configuration in reserved field 396 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 397 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 398 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 399 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 400 401 // suitable Sink SEP found, configure SEP 402 sep_found_w2_set_configuration = true; 403 connection->supported_codecs_bitmap |= (1 << AVDTP_CODEC_SBC); 404 } 405 break; 406 407 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 408 log_info("received non SBC codec. not implemented"); 409 break; 410 411 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 412 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_media_transport_capability_get_remote_seid(packet)); 413 break; 414 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 415 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 416 break; 417 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 418 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 419 break; 420 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 421 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_content_protection_capability_get_remote_seid(packet)); 422 break; 423 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 424 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_header_compression_capability_get_remote_seid(packet)); 425 break; 426 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 427 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid 0x%02x", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 428 break; 429 430 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 431 cid = avdtp_subevent_signaling_delay_reporting_capability_get_avdtp_cid(packet); 432 log_info("received AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, cid 0x%02x, state %d", cid, a2dp_source_state); 433 434 if (a2dp_source_cid != cid) break; 435 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 436 437 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_DELAY_REPORTING, 1); 438 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 439 break; 440 441 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 442 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 443 if (a2dp_source_cid != cid) break; 444 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 445 446 if (sep_found_w2_set_configuration){ 447 a2dp_source_state = A2DP_SET_CONFIGURATION; 448 sep_found_w2_set_configuration = false; 449 break; 450 } 451 // endpoint was not suitable, check next one 452 sc.active_remote_sep_index++; 453 if (sc.active_remote_sep_index >= num_remote_seps){ 454 // we didn't find a suitable SBC stream endpoint, sorry. 455 if (outgoing_active){ 456 outgoing_active = false; 457 connection = avdtp_get_connection_for_avdtp_cid(cid); 458 btstack_assert(connection != NULL); 459 a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 460 } 461 a2dp_discover_seps_with_next_waiting_connection(); 462 } 463 break; 464 465 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 466 cid = avdtp_subevent_signaling_delay_report_get_avdtp_cid(packet); 467 if (a2dp_source_cid != cid) break; 468 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 469 break; 470 471 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 472 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 473 474 if ((a2dp_source_cid == cid) && (a2dp_source_state == A2DP_W4_SET_CONFIGURATION)){ 475 // outgoing: discovery and config of remote sink sep successful, trigger stream open 476 a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 477 } else { 478 // incoming: accept cid and wait for stream open 479 a2dp_source_cid = cid; 480 a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 481 } 482 483 // config set: stop timer 484 a2dp_source_set_config_timer_stop(); 485 stream_endpoint_configured = true; 486 487 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 488 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 489 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 490 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 491 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 492 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 493 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 494 495 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u., remote seid 0x%02x", sc.sampling_frequency, sc.max_bitpool_value, avdtp_subevent_signaling_media_codec_sbc_configuration_get_remote_seid(packet)); 496 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 497 break; 498 499 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 500 break; 501 502 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 503 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 504 break; 505 506 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 507 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 508 if (a2dp_source_cid != cid) break; 509 if (a2dp_source_state != A2DP_W4_OPEN_STREAM_WITH_SEID) break; 510 511 outgoing_active = false; 512 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 513 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 514 status = avdtp_subevent_streaming_connection_established_get_status(packet); 515 if (status != ERROR_CODE_SUCCESS){ 516 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 517 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 518 break; 519 } 520 521 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid 0x%02x, remote seid 0x%02x", cid, local_seid, remote_seid); 522 a2dp_source_state = A2DP_STREAMING_OPENED; 523 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 524 break; 525 526 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 527 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 528 529 // reset discovery timer while remote is active 530 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) { 531 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(&a2dp_source_set_config_timer); 532 if ((avdtp_cid == 0) || (avdtp_cid != cid)) break; 533 log_info("Reset discovery timer"); 534 a2dp_source_set_config_timer_start(avdtp_cid); 535 break; 536 } 537 538 if (a2dp_source_cid != cid) break; 539 540 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 541 542 log_info("A2DP cmd %s accepted, global state %d, cid 0x%02x", avdtp_si2str(signal_identifier), a2dp_source_state, cid); 543 544 switch (a2dp_source_state){ 545 case A2DP_GET_CAPABILITIES: 546 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 547 log_info("A2DP get capabilities for remote seid 0x%02x", remote_seid); 548 avdtp_source_get_all_capabilities(cid, remote_seid); 549 return; 550 551 case A2DP_SET_CONFIGURATION: 552 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 553 log_info("A2DP initiate set configuration locally and wait for response ... local seid 0x%02x, remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid); 554 a2dp_source_state = A2DP_W4_SET_CONFIGURATION; 555 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); 556 return; 557 558 case A2DP_W2_OPEN_STREAM_WITH_SEID: 559 log_info("A2DP open stream ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 560 a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 561 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 562 break; 563 564 case A2DP_W2_RECONFIGURE_WITH_SEID: 565 log_info("A2DP reconfigured ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 566 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 567 a2dp_source_state = A2DP_STREAMING_OPENED; 568 break; 569 570 case A2DP_STREAMING_OPENED: 571 switch (signal_identifier){ 572 case AVDTP_SI_START: 573 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 574 break; 575 case AVDTP_SI_SUSPEND: 576 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 577 break; 578 case AVDTP_SI_ABORT: 579 case AVDTP_SI_CLOSE: 580 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 581 break; 582 default: 583 break; 584 } 585 break; 586 587 default: 588 break; 589 } 590 break; 591 592 case AVDTP_SUBEVENT_SIGNALING_REJECT: 593 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 594 if (a2dp_source_cid != cid) break; 595 if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break; 596 597 a2dp_source_state = A2DP_CONNECTED; 598 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 599 break; 600 601 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 602 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 603 if (a2dp_source_cid != cid) break; 604 if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break; 605 606 a2dp_source_state = A2DP_CONNECTED; 607 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 608 break; 609 610 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 611 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 612 if (a2dp_source_cid != cid) break; 613 614 a2dp_source_state = A2DP_CONFIGURED; 615 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 616 break; 617 618 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 619 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 620 // connect/release are passed on to app 621 if (a2dp_source_cid == cid){ 622 stream_endpoint_configured = false; 623 a2dp_source_state = A2DP_IDLE; 624 a2dp_source_cid = 0; 625 } 626 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 627 break; 628 629 default: 630 break; 631 } 632 } 633 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 634 btstack_assert(callback != NULL); 635 636 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 637 a2dp_source_packet_handler_user = callback; 638 } 639 640 void a2dp_source_init(void){ 641 avdtp_source_init(); 642 } 643 644 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 645 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 646 uint8_t * codec_configuration, uint16_t codec_configuration_len){ 647 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 648 if (!local_stream_endpoint){ 649 return NULL; 650 } 651 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 652 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 653 codec_capabilities, codec_capabilities_len); 654 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 655 656 // store user codec configuration buffer 657 local_stream_endpoint->media_codec_configuration_info = codec_configuration; 658 local_stream_endpoint->media_codec_configuration_len = codec_configuration_len; 659 660 sc.local_stream_endpoint = local_stream_endpoint; 661 return local_stream_endpoint; 662 } 663 664 void a2dp_source_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 665 avdtp_source_finalize_stream_endpoint(stream_endpoint); 666 } 667 668 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 669 if (outgoing_active || stream_endpoint_configured) { 670 return ERROR_CODE_COMMAND_DISALLOWED; 671 } 672 673 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 674 if (!sc.local_stream_endpoint){ 675 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 676 } 677 678 uint16_t outgoing_cid; 679 680 outgoing_active = true; 681 uint8_t status = avdtp_source_connect(remote_addr, &outgoing_cid); 682 if (status != ERROR_CODE_SUCCESS) { 683 // if there's already a connection for for remote addr, avdtp_source_connect fails, 684 // but the stream will get set-up nevertheless 685 outgoing_active = false; 686 return status; 687 } 688 689 // stop sep discovery for other 690 if (a2dp_source_state != A2DP_IDLE){ 691 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_source_cid); 692 if (connection != NULL){ 693 // sdp discovery has started: post-pone action, reserve sep discovery mechanism 694 connection->a2dp_source_discover_seps = true; 695 } 696 } 697 698 // setup state 699 a2dp_source_state = A2DP_W4_CONNECTED; 700 a2dp_source_cid = outgoing_cid; 701 *avdtp_cid = outgoing_cid; 702 703 return ERROR_CODE_SUCCESS; 704 } 705 706 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 707 return avdtp_disconnect(avdtp_cid); 708 } 709 710 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 711 btstack_assert(sc.local_stream_endpoint != NULL); 712 713 if (a2dp_source_cid != avdtp_cid){ 714 return ERROR_CODE_COMMAND_DISALLOWED; 715 } 716 717 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 718 if (connection == NULL){ 719 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 720 } 721 722 if (a2dp_source_state != A2DP_STREAMING_OPENED) { 723 return ERROR_CODE_COMMAND_DISALLOWED; 724 } 725 726 log_info("Reconfigure avdtp_cid 0x%02x", avdtp_cid); 727 728 (void)memcpy(sc.local_stream_endpoint->media_codec_sbc_info, 729 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 730 4); 731 732 // update sampling frequency 733 uint8_t config = sc.local_stream_endpoint->media_codec_sbc_info[0] & 0x0f; 734 switch (sampling_frequency){ 735 case 48000: 736 config |= (AVDTP_SBC_48000 << 4); 737 break; 738 case 44100: 739 config |= (AVDTP_SBC_44100 << 4); 740 break; 741 case 32000: 742 config |= (AVDTP_SBC_32000 << 4); 743 break; 744 case 16000: 745 config |= (AVDTP_SBC_16000 << 4); 746 break; 747 default: 748 log_error("Unsupported sampling frequency %u", sampling_frequency); 749 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 750 } 751 sc.local_stream_endpoint->media_codec_sbc_info[0] = config; 752 753 avdtp_capabilities_t new_configuration; 754 new_configuration.media_codec.media_type = AVDTP_AUDIO; 755 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 756 new_configuration.media_codec.media_codec_information_len = 4; 757 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->media_codec_sbc_info; 758 759 // start reconfigure 760 a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 761 762 return avdtp_source_reconfigure( 763 avdtp_cid, 764 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 765 sc.local_stream_endpoint->remote_sep.seid, 766 1 << AVDTP_MEDIA_CODEC, 767 new_configuration 768 ); 769 } 770 771 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 772 return avdtp_start_stream(avdtp_cid, local_seid); 773 } 774 775 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 776 return avdtp_suspend_stream(avdtp_cid, local_seid); 777 } 778 779 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 780 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 781 } 782 783 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 784 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 785 } 786 787 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){ 788 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 789 } 790