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 BLUEKITCHEN 25 * GMBH 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.h" 61 #include "classic/a2dp_source.h" 62 #include "classic/avdtp_source.h" 63 #include "classic/avdtp_util.h" 64 #include "classic/sdp_util.h" 65 #include "l2cap.h" 66 67 #define AVDTP_MAX_SEP_NUM 10 68 #define A2DP_SET_CONFIG_DELAY_MS 200 69 70 static const char * a2dp_default_source_service_name = "BTstack A2DP Source Service"; 71 static const char * a2dp_default_source_service_provider_name = "BTstack A2DP Source Service Provider"; 72 73 static uint8_t (*a2dp_source_media_config_validator)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size); 74 75 // config process - singletons using sep_discovery_cid is used as mutex 76 static uint16_t a2dp_source_sep_discovery_cid; 77 static uint16_t a2dp_source_sep_discovery_count; 78 static uint16_t a2dp_source_sep_discovery_index; 79 static avdtp_sep_t a2dp_source_sep_discovery_seps[AVDTP_MAX_SEP_NUM]; 80 static btstack_timer_source_t a2dp_source_set_config_timer; 81 static bool a2dp_source_set_config_timer_active; 82 83 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 84 static void a2dp_discover_seps_with_next_waiting_connection(void); 85 86 static void a2dp_source_streaming_emit_connection_failed(avdtp_connection_t *connection, uint8_t status) { 87 uint8_t event[14]; 88 int pos = 0; 89 event[pos++] = HCI_EVENT_A2DP_META; 90 event[pos++] = sizeof(event) - 2; 91 event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 92 little_endian_store_16(event, pos, connection->avdtp_cid); 93 pos += 2; 94 reverse_bd_addr(connection->remote_addr, &event[pos]); 95 pos += 6; 96 event[pos++] = 0; 97 event[pos++] = 0; 98 event[pos++] = status; 99 a2dp_emit_source(event, sizeof(event)); 100 } 101 102 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){ 103 uint8_t* attribute; 104 de_create_sequence(service); 105 106 // 0x0000 "Service Record Handle" 107 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 108 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 109 110 // 0x0001 "Service Class ID List" 111 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 112 attribute = de_push_sequence(service); 113 { 114 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 115 } 116 de_pop_sequence(service, attribute); 117 118 // 0x0004 "Protocol Descriptor List" 119 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 120 attribute = de_push_sequence(service); 121 { 122 uint8_t* l2cpProtocol = de_push_sequence(attribute); 123 { 124 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 125 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 126 } 127 de_pop_sequence(attribute, l2cpProtocol); 128 129 uint8_t* avProtocol = de_push_sequence(attribute); 130 { 131 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 132 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 133 } 134 de_pop_sequence(attribute, avProtocol); 135 } 136 de_pop_sequence(service, attribute); 137 138 // 0x0005 "Public Browse Group" 139 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 140 attribute = de_push_sequence(service); 141 { 142 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 143 } 144 de_pop_sequence(service, attribute); 145 146 // 0x0009 "Bluetooth Profile Descriptor List" 147 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 148 attribute = de_push_sequence(service); 149 { 150 uint8_t *a2dProfile = de_push_sequence(attribute); 151 { 152 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 153 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 154 } 155 de_pop_sequence(attribute, a2dProfile); 156 } 157 de_pop_sequence(service, attribute); 158 159 160 // 0x0100 "Service Name" 161 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 162 if (service_name){ 163 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 164 } else { 165 de_add_data(service, DE_STRING, strlen(a2dp_default_source_service_name), (uint8_t *) a2dp_default_source_service_name); 166 } 167 168 // 0x0100 "Provider Name" 169 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 170 if (service_provider_name){ 171 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 172 } else { 173 de_add_data(service, DE_STRING, strlen(a2dp_default_source_service_provider_name), (uint8_t *) a2dp_default_source_service_provider_name); 174 } 175 176 // 0x0311 "Supported Features" 177 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 178 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 179 } 180 181 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 182 uint8_t event[7]; 183 int pos = 0; 184 event[pos++] = HCI_EVENT_A2DP_META; 185 event[pos++] = sizeof(event) - 2; 186 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 187 little_endian_store_16(event, pos, cid); 188 pos += 2; 189 event[pos++] = local_seid; 190 event[pos++] = status; 191 a2dp_emit_source(event, sizeof(event)); 192 } 193 194 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 195 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 196 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 197 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL); 198 a2dp_source_set_config_timer_active = false; 199 200 log_info("Set Config timer fired, avdtp_cid 0x%02x", avdtp_cid); 201 202 if (connection == NULL) { 203 a2dp_discover_seps_with_next_waiting_connection(); 204 return; 205 } 206 207 if (connection->a2dp_source_stream_endpoint_configured) return; 208 avdtp_source_discover_stream_endpoints(avdtp_cid); 209 } 210 211 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 212 log_info("Set Config timer start for cid 0%02x", avdtp_cid); 213 a2dp_source_set_config_timer_active = true; 214 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 215 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 216 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 217 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 218 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 219 } 220 221 static void a2dp_source_set_config_timer_restart(void){ 222 log_info("Set Config timer restart"); 223 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 224 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 225 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 226 } 227 228 static void a2dp_source_set_config_timer_stop(void){ 229 if (a2dp_source_set_config_timer_active == false) return; 230 log_info("Set Config timer stop"); 231 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 232 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL); 233 a2dp_source_set_config_timer_active = false; 234 } 235 236 // Discover seps, both incoming and outgoing 237 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 238 connection->a2dp_source_state = A2DP_DISCOVER_SEPS; 239 connection->a2dp_source_discover_seps = false; 240 241 a2dp_source_sep_discovery_index = 0; 242 a2dp_source_sep_discovery_count = 0; 243 memset(a2dp_source_sep_discovery_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 244 a2dp_source_sep_discovery_cid = connection->avdtp_cid; 245 246 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 247 if (connection->a2dp_source_outgoing_active){ 248 log_info("discover seps"); 249 avdtp_source_discover_stream_endpoints(connection->avdtp_cid); 250 } else { 251 log_info("wait a bit, then discover seps"); 252 a2dp_source_set_config_timer_start(connection->avdtp_cid); 253 } 254 } 255 256 static void a2dp_discover_seps_with_next_waiting_connection(void){ 257 btstack_assert(a2dp_source_sep_discovery_cid == 0); 258 btstack_linked_list_iterator_t it; 259 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 260 while (btstack_linked_list_iterator_has_next(&it)){ 261 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 262 if (!next_connection->a2dp_source_discover_seps) continue; 263 a2dp_start_discovering_seps(next_connection); 264 } 265 } 266 267 static void a2dp_source_ready_for_sep_discovery(avdtp_connection_t * connection){ 268 // start discover seps now if: 269 // - outgoing active: signaling for outgoing connection 270 // - outgoing not active: incoming connection and no sep discover ongoing 271 272 // sep discovery active? 273 if (a2dp_source_sep_discovery_cid == 0){ 274 a2dp_start_discovering_seps(connection); 275 } else { 276 // post-pone sep discovery 277 connection->a2dp_source_discover_seps = true; 278 } 279 } 280 281 static void a2dp_handle_received_configuration(const uint8_t *packet, uint8_t local_seid) { 282 uint16_t cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 283 avdtp_connection_t *avdtp_connection = avdtp_get_connection_for_avdtp_cid(cid); 284 btstack_assert(avdtp_connection != NULL); 285 avdtp_connection->a2dp_source_local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 286 // bail out if local seid invalid 287 if (!avdtp_connection->a2dp_source_local_stream_endpoint) return; 288 289 // stop timer 290 if (a2dp_source_sep_discovery_cid == cid) { 291 a2dp_source_set_config_timer_stop(); 292 a2dp_source_sep_discovery_cid = 0; 293 } 294 295 avdtp_connection->a2dp_source_stream_endpoint_configured = true; 296 297 switch (avdtp_connection->a2dp_source_state) { 298 case A2DP_W4_SET_CONFIGURATION: 299 // outgoing: discovery and config of remote sink sep successful, trigger stream open 300 avdtp_connection->a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 301 break; 302 case A2DP_DISCOVER_SEPS: 303 case A2DP_GET_CAPABILITIES: 304 case A2DP_W2_GET_ALL_CAPABILITIES: 305 case A2DP_DISCOVERY_DONE: 306 case A2DP_W4_GET_CONFIGURATION: 307 // incoming: wait for stream open 308 avdtp_connection->a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 309 break; 310 default: 311 // wait for configuration after sending reconfigure - keep state 312 break; 313 } 314 } 315 316 static void a2dp_source_set_config(avdtp_connection_t * connection){ 317 uint8_t remote_seid = connection->a2dp_source_local_stream_endpoint->set_config_remote_seid; 318 log_info("A2DP initiate set configuration locally and wait for response ... local seid 0x%02x, remote seid 0x%02x", avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), remote_seid); 319 connection->a2dp_source_state = A2DP_W4_SET_CONFIGURATION; 320 avdtp_source_set_configuration(connection->avdtp_cid, avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), remote_seid, connection->a2dp_source_local_stream_endpoint->remote_configuration_bitmap, connection->a2dp_source_local_stream_endpoint->remote_configuration); 321 } 322 323 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 324 UNUSED(channel); 325 UNUSED(size); 326 327 uint16_t cid; 328 avdtp_connection_t * connection; 329 330 uint8_t signal_identifier; 331 uint8_t status; 332 uint8_t local_seid; 333 uint8_t remote_seid; 334 335 if (packet_type != HCI_EVENT_PACKET) return; 336 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 337 338 switch (packet[2]){ 339 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 340 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 341 connection = avdtp_get_connection_for_avdtp_cid(cid); 342 btstack_assert(connection != NULL); 343 344 status = avdtp_subevent_signaling_connection_established_get_status(packet); 345 if (status != ERROR_CODE_SUCCESS){ 346 // notify about connection error only if we're initiator 347 if (connection->a2dp_source_outgoing_active){ 348 log_info("A2DP source signaling connection failed status 0x%02x", status); 349 connection->a2dp_source_outgoing_active = false; 350 a2dp_replace_subevent_id_and_emit_source(packet, size, 351 A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 352 } 353 break; 354 } 355 log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid); 356 connection->a2dp_source_state = A2DP_CONNECTED; 357 358 // notify app 359 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 360 361 // Windows 10 as Source starts SEP discovery after 1500 ms, but only if it did not get a Discover command 362 // If BTstack is configured for both roles, we need to avoid sending Discover command in Source Role for outgoing Sink connections 363 364 // For this, we trigger SDP query only if: 365 // a) this is an outgoing source connection 366 // b) this connection wasn't caused by an outgoing sink request 367 if (connection->a2dp_source_outgoing_active || !connection->a2dp_sink_outgoing_active){ 368 a2dp_source_ready_for_sep_discovery(connection); 369 } 370 break; 371 372 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 373 cid = avdtp_subevent_signaling_sep_found_get_avdtp_cid(packet); 374 connection = avdtp_get_connection_for_avdtp_cid(cid); 375 btstack_assert(connection != NULL); 376 377 if (connection->a2dp_source_state == A2DP_DISCOVER_SEPS) { 378 avdtp_sep_t sep; 379 memset(&sep, 0, sizeof(avdtp_sep_t)); 380 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 381 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 382 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 383 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 384 log_info("A2DP Found sep: remote seid 0x%02x, in_use %d, media type %d, sep type %s, index %d", 385 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", 386 a2dp_source_sep_discovery_count); 387 if ((sep.type == AVDTP_SINK) && (sep.in_use == false)) { 388 a2dp_source_sep_discovery_seps[a2dp_source_sep_discovery_count++] = sep; 389 } 390 } 391 break; 392 393 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 394 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 395 connection = avdtp_get_connection_for_avdtp_cid(cid); 396 btstack_assert(connection != NULL); 397 398 if (connection->a2dp_source_state != A2DP_DISCOVER_SEPS) break; 399 400 if (a2dp_source_sep_discovery_count > 0){ 401 connection->a2dp_source_state = A2DP_GET_CAPABILITIES; 402 a2dp_source_sep_discovery_index = 0; 403 connection->a2dp_source_have_config = false; 404 } else { 405 if (connection->a2dp_source_outgoing_active){ 406 connection->a2dp_source_outgoing_active = false; 407 connection = avdtp_get_connection_for_avdtp_cid(cid); 408 btstack_assert(connection != NULL); 409 a2dp_source_streaming_emit_connection_failed(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 410 } 411 412 // continue 413 connection->a2dp_source_state = A2DP_CONNECTED; 414 a2dp_source_sep_discovery_cid = 0; 415 a2dp_discover_seps_with_next_waiting_connection(); 416 } 417 break; 418 419 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 420 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 421 connection = avdtp_get_connection_for_avdtp_cid(cid); 422 btstack_assert(connection != NULL); 423 424 if (connection->a2dp_source_state != A2DP_GET_CAPABILITIES) break; 425 426 // forward codec capability 427 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY); 428 429 #ifndef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 430 // select SEP if none configured yet 431 if (connection->a2dp_source_have_config == false){ 432 // find SBC stream endpoint 433 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_source_stream_endpoint_for_media_codec(AVDTP_CODEC_SBC); 434 if (stream_endpoint != NULL){ 435 // choose SBC config params 436 avdtp_configuration_sbc_t configuration; 437 configuration.sampling_frequency = avdtp_choose_sbc_sampling_frequency(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet)); 438 configuration.channel_mode = avdtp_choose_sbc_channel_mode(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet)); 439 configuration.block_length = avdtp_choose_sbc_block_length(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_block_length_bitmap(packet)); 440 configuration.subbands = avdtp_choose_sbc_subbands(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 441 configuration.allocation_method = avdtp_choose_sbc_allocation_method(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet)); 442 configuration.max_bitpool_value = avdtp_choose_sbc_max_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet)); 443 configuration.min_bitpool_value = avdtp_choose_sbc_min_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet)); 444 445 // and pre-select this endpoint 446 local_seid = avdtp_stream_endpoint_seid(stream_endpoint); 447 remote_seid = avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet); 448 a2dp_source_set_config_sbc(cid, local_seid, remote_seid, &configuration); 449 } 450 } 451 #endif 452 break; 453 454 // forward codec capability 455 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY: 456 cid = avdtp_subevent_signaling_media_codec_mpeg_audio_capability_get_avdtp_cid(packet); 457 connection = avdtp_get_connection_for_avdtp_cid(cid); 458 btstack_assert(connection != NULL); 459 460 if (connection->a2dp_source_state != A2DP_GET_CAPABILITIES) break; 461 a2dp_replace_subevent_id_and_emit_source(packet, size, 462 A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY); 463 break; 464 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY: 465 cid = avdtp_subevent_signaling_media_codec_mpeg_aac_capability_get_avdtp_cid(packet); 466 connection = avdtp_get_connection_for_avdtp_cid(cid); 467 btstack_assert(connection != NULL); 468 469 if (connection->a2dp_source_state != A2DP_GET_CAPABILITIES) break; 470 a2dp_replace_subevent_id_and_emit_source(packet, size, 471 A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY); 472 break; 473 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY: 474 cid = avdtp_subevent_signaling_media_codec_atrac_capability_get_avdtp_cid(packet); 475 connection = avdtp_get_connection_for_avdtp_cid(cid); 476 btstack_assert(connection != NULL); 477 478 if (connection->a2dp_source_state != A2DP_GET_CAPABILITIES) break; 479 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY); 480 break; 481 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 482 cid = avdtp_subevent_signaling_media_codec_other_capability_get_avdtp_cid(packet); 483 connection = avdtp_get_connection_for_avdtp_cid(cid); 484 btstack_assert(connection != NULL); 485 486 if (connection->a2dp_source_state != A2DP_GET_CAPABILITIES) break; 487 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY); 488 break; 489 490 // not forwarded 491 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 492 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 493 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 494 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 495 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 496 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 497 break; 498 499 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 500 cid = avdtp_subevent_signaling_delay_reporting_capability_get_avdtp_cid(packet); 501 connection = avdtp_get_connection_for_avdtp_cid(cid); 502 btstack_assert(connection != NULL); 503 log_info("received AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, cid 0x%02x, state %d", cid, connection->a2dp_source_state); 504 505 if (connection->a2dp_source_state != A2DP_GET_CAPABILITIES) break; 506 507 // store delay reporting capability 508 a2dp_source_sep_discovery_seps[a2dp_source_sep_discovery_index].registered_service_categories |= 1 << AVDTP_DELAY_REPORTING; 509 510 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 511 break; 512 513 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 514 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 515 connection = avdtp_get_connection_for_avdtp_cid(cid); 516 btstack_assert(connection != NULL); 517 518 if (connection->a2dp_source_state != A2DP_GET_CAPABILITIES) break; 519 520 // forward capabilities done for endpoint 521 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE); 522 523 // endpoint was not suitable, check next one 524 a2dp_source_sep_discovery_index++; 525 if (a2dp_source_sep_discovery_index >= a2dp_source_sep_discovery_count){ 526 527 // emit 'all capabilities for all seps reported' 528 uint8_t event[6]; 529 uint8_t pos = 0; 530 event[pos++] = HCI_EVENT_A2DP_META; 531 event[pos++] = sizeof(event) - 2; 532 event[pos++] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE; 533 little_endian_store_16(event, pos, cid); 534 a2dp_emit_source(event, sizeof(event)); 535 536 // do we have a valid config? 537 if (connection->a2dp_source_have_config){ 538 connection->a2dp_source_state = A2DP_SET_CONFIGURATION; 539 connection->a2dp_source_have_config = false; 540 break; 541 } 542 543 #ifdef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 544 connection->a2dp_source_state = A2DP_DISCOVERY_DONE; 545 // TODO call a2dp_discover_seps_with_next_waiting_connection? 546 break; 547 #else 548 // we didn't find a suitable SBC stream endpoint, sorry. 549 if (connection->a2dp_source_outgoing_active){ 550 connection->a2dp_source_outgoing_active = false; 551 connection = avdtp_get_connection_for_avdtp_cid(cid); 552 btstack_assert(connection != NULL); 553 a2dp_source_streaming_emit_connection_failed(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 554 } 555 connection->a2dp_source_state = A2DP_CONNECTED; 556 a2dp_source_sep_discovery_cid = 0; 557 a2dp_discover_seps_with_next_waiting_connection(); 558 #endif 559 } 560 break; 561 562 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 563 cid = avdtp_subevent_signaling_delay_report_get_avdtp_cid(packet); 564 connection = avdtp_get_connection_for_avdtp_cid(cid); 565 btstack_assert(connection != NULL); 566 567 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 568 break; 569 570 // forward codec configuration 571 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 572 local_seid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_local_seid(packet); 573 a2dp_handle_received_configuration(packet, local_seid); 574 a2dp_replace_subevent_id_and_emit_source(packet, size, 575 A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 576 break; 577 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION: 578 local_seid = avdtp_subevent_signaling_media_codec_mpeg_audio_configuration_get_local_seid(packet); 579 a2dp_handle_received_configuration(packet, local_seid); 580 a2dp_replace_subevent_id_and_emit_source(packet, size, 581 A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION); 582 break; 583 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION: 584 local_seid = avdtp_subevent_signaling_media_codec_mpeg_aac_configuration_get_local_seid(packet); 585 a2dp_handle_received_configuration(packet, local_seid); 586 a2dp_replace_subevent_id_and_emit_source(packet, size, 587 A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION); 588 break; 589 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION: 590 local_seid = avdtp_subevent_signaling_media_codec_atrac_configuration_get_local_seid(packet); 591 a2dp_handle_received_configuration(packet, local_seid); 592 a2dp_replace_subevent_id_and_emit_source(packet, size, 593 A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION); 594 break; 595 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 596 local_seid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_local_seid(packet); 597 a2dp_handle_received_configuration(packet, local_seid); 598 a2dp_replace_subevent_id_and_emit_source(packet, size, 599 A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION); 600 break; 601 602 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 603 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 604 break; 605 606 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 607 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 608 connection = avdtp_get_connection_for_avdtp_cid(cid); 609 btstack_assert(connection != NULL); 610 611 if (connection->a2dp_source_state != A2DP_W4_OPEN_STREAM_WITH_SEID) break; 612 613 connection->a2dp_source_outgoing_active = false; 614 status = avdtp_subevent_streaming_connection_established_get_status(packet); 615 if (status != ERROR_CODE_SUCCESS){ 616 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 617 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 618 break; 619 } 620 621 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid 0x%02x, remote seid 0x%02x", cid, 622 avdtp_subevent_streaming_connection_established_get_local_seid(packet), 623 avdtp_subevent_streaming_connection_established_get_remote_seid(packet)); 624 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 625 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 626 break; 627 628 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 629 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 630 connection = avdtp_get_connection_for_avdtp_cid(cid); 631 btstack_assert(connection != NULL); 632 633 // restart set config timer while remote is active for current cid 634 if (a2dp_source_set_config_timer_active && 635 (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) && 636 (cid == a2dp_source_sep_discovery_cid)){ 637 638 a2dp_source_set_config_timer_restart(); 639 break; 640 } 641 642 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 643 644 log_info("A2DP cmd %s accepted, global state %d, cid 0x%02x", avdtp_si2str(signal_identifier), connection->a2dp_source_state, cid); 645 646 switch (connection->a2dp_source_state){ 647 case A2DP_GET_CAPABILITIES: 648 remote_seid = a2dp_source_sep_discovery_seps[a2dp_source_sep_discovery_index].seid; 649 log_info("A2DP get capabilities for remote seid 0x%02x", remote_seid); 650 avdtp_source_get_all_capabilities(cid, remote_seid); 651 return; 652 653 case A2DP_SET_CONFIGURATION: 654 a2dp_source_set_config(connection); 655 return; 656 657 case A2DP_W2_OPEN_STREAM_WITH_SEID: 658 log_info("A2DP open stream ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), connection->a2dp_source_local_stream_endpoint->remote_sep.seid); 659 connection->a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 660 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), connection->a2dp_source_local_stream_endpoint->remote_sep.seid); 661 break; 662 663 case A2DP_W2_RECONFIGURE_WITH_SEID: 664 log_info("A2DP reconfigured ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), connection->a2dp_source_local_stream_endpoint->remote_sep.seid); 665 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), ERROR_CODE_SUCCESS); 666 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 667 break; 668 669 case A2DP_STREAMING_OPENED: 670 switch (signal_identifier){ 671 case AVDTP_SI_START: 672 a2dp_emit_source_stream_event(cid, avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 673 break; 674 case AVDTP_SI_SUSPEND: 675 a2dp_emit_source_stream_event(cid, avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 676 break; 677 case AVDTP_SI_ABORT: 678 case AVDTP_SI_CLOSE: 679 a2dp_emit_source_stream_event(cid, avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 680 break; 681 default: 682 break; 683 } 684 break; 685 686 default: 687 break; 688 } 689 break; 690 691 case AVDTP_SUBEVENT_SIGNALING_REJECT: 692 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 693 connection = avdtp_get_connection_for_avdtp_cid(cid); 694 btstack_assert(connection != NULL); 695 696 if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break; 697 698 switch (connection->a2dp_source_state) { 699 case A2DP_W2_RECONFIGURE_WITH_SEID: 700 log_info("A2DP reconfigure failed ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), connection->a2dp_source_local_stream_endpoint->remote_sep.seid); 701 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), ERROR_CODE_UNSPECIFIED_ERROR); 702 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 703 break; 704 default: 705 connection->a2dp_source_state = A2DP_CONNECTED; 706 break; 707 } 708 709 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 710 break; 711 712 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 713 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 714 connection = avdtp_get_connection_for_avdtp_cid(cid); 715 btstack_assert(connection != NULL); 716 717 if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break; 718 719 connection->a2dp_source_state = A2DP_CONNECTED; 720 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 721 break; 722 723 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 724 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 725 connection = avdtp_get_connection_for_avdtp_cid(cid); 726 btstack_assert(connection != NULL); 727 728 connection->a2dp_source_state = A2DP_CONFIGURED; 729 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 730 break; 731 732 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 733 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 734 connection = avdtp_get_connection_for_avdtp_cid(cid); 735 btstack_assert(connection != NULL); 736 737 // connect/release are passed on to app 738 if (a2dp_source_sep_discovery_cid == cid){ 739 a2dp_source_set_config_timer_stop(); 740 connection->a2dp_source_stream_endpoint_configured = false; 741 connection->a2dp_source_local_stream_endpoint = NULL; 742 743 connection->a2dp_source_state = A2DP_IDLE; 744 a2dp_source_sep_discovery_cid = 0; 745 } 746 a2dp_replace_subevent_id_and_emit_source(packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 747 break; 748 749 default: 750 break; 751 } 752 } 753 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 754 btstack_assert(callback != NULL); 755 756 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 757 a2dp_register_source_packet_handler(callback); 758 } 759 760 void a2dp_source_init(void){ 761 a2dp_init(); 762 avdtp_source_init(); 763 } 764 765 void a2dp_source_deinit(void){ 766 a2dp_deinit(); 767 avdtp_source_deinit(); 768 a2dp_source_media_config_validator = NULL; 769 a2dp_source_sep_discovery_cid = 0; 770 } 771 772 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 773 const uint8_t *codec_capabilities, uint16_t codec_capabilities_len, 774 uint8_t * codec_configuration, uint16_t codec_configuration_len){ 775 avdtp_stream_endpoint_t * stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 776 if (!stream_endpoint){ 777 return NULL; 778 } 779 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(stream_endpoint)); 780 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(stream_endpoint), media_type, media_codec_type, 781 codec_capabilities, codec_capabilities_len); 782 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(stream_endpoint)); 783 784 // store user codec configuration buffer 785 stream_endpoint->media_codec_type = media_codec_type; 786 stream_endpoint->media_codec_configuration_info = codec_configuration; 787 stream_endpoint->media_codec_configuration_len = codec_configuration_len; 788 789 return stream_endpoint; 790 } 791 792 void a2dp_source_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 793 avdtp_source_finalize_stream_endpoint(stream_endpoint); 794 } 795 796 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint16_t *avdtp_cid) { 797 798 uint16_t outgoing_cid; 799 800 avdtp_connection_t * connection = avdtp_get_connection_for_bd_addr(remote_addr); 801 if (connection == NULL){ 802 uint8_t status = avdtp_source_connect(remote_addr, &outgoing_cid); 803 if (status != ERROR_CODE_SUCCESS) { 804 // if there's already a connection for for remote addr, avdtp_source_connect fails, 805 // but the stream will get set-up nevertheless 806 return status; 807 } 808 connection = avdtp_get_connection_for_avdtp_cid(outgoing_cid); 809 btstack_assert(connection != NULL); 810 811 // setup state 812 connection->a2dp_source_outgoing_active = true; 813 connection->a2dp_source_state = A2DP_W4_CONNECTED; 814 *avdtp_cid = outgoing_cid; 815 816 } else { 817 if (connection->a2dp_source_outgoing_active || connection->a2dp_source_stream_endpoint_configured) { 818 return ERROR_CODE_COMMAND_DISALLOWED; 819 } 820 821 // check state 822 switch (connection->a2dp_source_state){ 823 case A2DP_IDLE: 824 case A2DP_CONNECTED: 825 // restart process e.g. if there no suitable stream endpoints or they had been in use 826 connection->a2dp_source_outgoing_active = true; 827 *avdtp_cid = connection->avdtp_cid; 828 a2dp_source_ready_for_sep_discovery(connection); 829 break; 830 default: 831 return ERROR_CODE_COMMAND_DISALLOWED; 832 } 833 } 834 return ERROR_CODE_SUCCESS; 835 } 836 837 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 838 return avdtp_disconnect(avdtp_cid); 839 } 840 841 842 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 843 return avdtp_start_stream(avdtp_cid, local_seid); 844 } 845 846 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 847 return avdtp_suspend_stream(avdtp_cid, local_seid); 848 } 849 850 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 851 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 852 } 853 854 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 855 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 856 } 857 858 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){ 859 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 860 } 861 862 uint8_t a2dp_source_stream_send_media_payload_rtp(uint16_t a2dp_cid, uint8_t local_seid, uint8_t marker, uint8_t * payload, uint16_t payload_size){ 863 return avdtp_source_stream_send_media_payload_rtp(a2dp_cid, local_seid, marker, payload, payload_size); 864 } 865 866 uint8_t a2dp_source_stream_send_media_packet(uint16_t a2dp_cid, uint8_t local_seid, const uint8_t * packet, uint16_t size){ 867 return avdtp_source_stream_send_media_packet(a2dp_cid, local_seid, packet, size); 868 } 869 870 static uint8_t a2dp_source_config_init(avdtp_connection_t *connection, uint8_t local_seid, uint8_t remote_seid, 871 avdtp_media_codec_type_t codec_type) { 872 873 // check state 874 switch (connection->a2dp_source_state){ 875 case A2DP_DISCOVERY_DONE: 876 case A2DP_GET_CAPABILITIES: 877 break; 878 default: 879 return ERROR_CODE_COMMAND_DISALLOWED; 880 } 881 882 // lookup local stream endpoint 883 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 884 if (stream_endpoint == NULL){ 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 // lookup remote stream endpoint 889 avdtp_sep_t * remote_sep = NULL; 890 uint8_t i; 891 for (i=0; i < a2dp_source_sep_discovery_count; i++){ 892 if (a2dp_source_sep_discovery_seps[i].seid == remote_seid){ 893 remote_sep = &a2dp_source_sep_discovery_seps[i]; 894 } 895 } 896 if (remote_sep == NULL){ 897 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 898 } 899 900 // set media configuration 901 stream_endpoint->remote_configuration_bitmap = store_bit16(stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 902 stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 903 stream_endpoint->remote_configuration.media_codec.media_codec_type = codec_type; 904 // remote seid to use 905 stream_endpoint->set_config_remote_seid = remote_seid; 906 // enable delay reporting if supported 907 if (remote_sep->registered_service_categories & (1<<AVDTP_DELAY_REPORTING)){ 908 stream_endpoint->remote_configuration_bitmap = store_bit16(stream_endpoint->remote_configuration_bitmap, AVDTP_DELAY_REPORTING, 1); 909 } 910 911 // suitable Sink stream endpoint found, configure it 912 connection->a2dp_source_local_stream_endpoint = stream_endpoint; 913 connection->a2dp_source_have_config = true; 914 915 #ifdef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 916 // continue outgoing configuration 917 if (connection->a2dp_source_state == A2DP_DISCOVERY_DONE){ 918 connection->a2dp_source_state = A2DP_SET_CONFIGURATION; 919 } 920 #endif 921 922 return ERROR_CODE_SUCCESS; 923 } 924 925 uint8_t a2dp_source_set_config_sbc(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, const avdtp_configuration_sbc_t * configuration){ 926 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 927 if (connection == NULL){ 928 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 929 } 930 931 uint8_t status = a2dp_source_config_init(connection, local_seid, remote_seid, AVDTP_CODEC_SBC); 932 if (status != 0) { 933 return status; 934 } 935 // set config in reserved buffer 936 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) connection->a2dp_source_local_stream_endpoint->media_codec_info; 937 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 4; 938 avdtp_config_sbc_store(connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information, configuration); 939 940 #ifdef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 941 a2dp_source_set_config(connection); 942 #endif 943 944 return ERROR_CODE_SUCCESS; 945 } 946 947 uint8_t a2dp_source_set_config_mpeg_audio(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, const avdtp_configuration_mpeg_audio_t * configuration){ 948 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 949 if (connection == NULL){ 950 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 951 } 952 953 uint8_t status = a2dp_source_config_init(connection, local_seid, remote_seid, AVDTP_CODEC_MPEG_1_2_AUDIO); 954 if (status != 0) { 955 return status; 956 } 957 958 // set config in reserved buffer 959 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *)connection->a2dp_source_local_stream_endpoint->media_codec_info; 960 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 4; 961 avdtp_config_mpeg_audio_store( connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information, configuration); 962 963 #ifdef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 964 a2dp_source_set_config(connection); 965 #endif 966 967 return ERROR_CODE_SUCCESS; 968 } 969 970 uint8_t a2dp_source_set_config_mpeg_aac(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, const avdtp_configuration_mpeg_aac_t * configuration){ 971 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 972 if (connection == NULL){ 973 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 974 } 975 976 uint8_t status = a2dp_source_config_init(connection, local_seid, remote_seid, AVDTP_CODEC_MPEG_2_4_AAC); 977 if (status != 0) { 978 return status; 979 } 980 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) connection->a2dp_source_local_stream_endpoint->media_codec_info; 981 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 6; 982 avdtp_config_mpeg_aac_store( connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information, configuration); 983 984 #ifdef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 985 a2dp_source_set_config(connection); 986 #endif 987 988 return ERROR_CODE_SUCCESS; 989 } 990 991 uint8_t a2dp_source_set_config_atrac(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, const avdtp_configuration_atrac_t * configuration){ 992 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 993 if (connection == NULL){ 994 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 995 } 996 997 uint8_t status = a2dp_source_config_init(connection, local_seid, remote_seid, AVDTP_CODEC_ATRAC_FAMILY); 998 if (status != 0) { 999 return status; 1000 } 1001 1002 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) connection->a2dp_source_local_stream_endpoint->media_codec_info; 1003 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 7; 1004 avdtp_config_atrac_store( connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information, configuration); 1005 1006 #ifdef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 1007 a2dp_source_set_config(connection); 1008 #endif 1009 1010 return ERROR_CODE_SUCCESS; 1011 } 1012 1013 uint8_t a2dp_source_set_config_other(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, 1014 const uint8_t * media_codec_information, uint8_t media_codec_information_len){ 1015 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 1016 if (connection == NULL){ 1017 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1018 } 1019 1020 uint8_t status = a2dp_source_config_init(connection, local_seid, remote_seid, AVDTP_CODEC_NON_A2DP); 1021 if (status != 0) { 1022 return status; 1023 } 1024 1025 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) media_codec_information; 1026 connection->a2dp_source_local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_information_len; 1027 1028 #ifdef ENABLE_A2DP_SOURCE_EXPLICIT_CONFIG 1029 a2dp_source_set_config(connection); 1030 #endif 1031 1032 return status; 1033 } 1034 1035 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 1036 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1037 if (connection == NULL){ 1038 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1039 } 1040 1041 if (connection->a2dp_source_state != A2DP_STREAMING_OPENED) { 1042 return ERROR_CODE_COMMAND_DISALLOWED; 1043 } 1044 1045 btstack_assert(connection->a2dp_source_local_stream_endpoint != NULL); 1046 1047 log_info("Reconfigure avdtp_cid 0x%02x", avdtp_cid); 1048 1049 avdtp_media_codec_type_t codec_type = connection->a2dp_source_local_stream_endpoint->sep.capabilities.media_codec.media_codec_type; 1050 uint8_t codec_info_len; 1051 switch (codec_type){ 1052 case AVDTP_CODEC_SBC: 1053 codec_info_len = 4; 1054 (void)memcpy(connection->a2dp_source_local_stream_endpoint->media_codec_info, connection->a2dp_source_local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1055 avdtp_config_sbc_set_sampling_frequency(connection->a2dp_source_local_stream_endpoint->media_codec_info, sampling_frequency); 1056 break; 1057 case AVDTP_CODEC_MPEG_1_2_AUDIO: 1058 codec_info_len = 4; 1059 (void)memcpy(connection->a2dp_source_local_stream_endpoint->media_codec_info, connection->a2dp_source_local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1060 avdtp_config_mpeg_audio_set_sampling_frequency(connection->a2dp_source_local_stream_endpoint->media_codec_info, sampling_frequency); 1061 break; 1062 case AVDTP_CODEC_MPEG_2_4_AAC: 1063 codec_info_len = 6; 1064 (void)memcpy(connection->a2dp_source_local_stream_endpoint->media_codec_info, connection->a2dp_source_local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1065 avdtp_config_mpeg_aac_set_sampling_frequency(connection->a2dp_source_local_stream_endpoint->media_codec_info, sampling_frequency); 1066 break; 1067 case AVDTP_CODEC_ATRAC_FAMILY: 1068 codec_info_len = 7; 1069 (void)memcpy(connection->a2dp_source_local_stream_endpoint->media_codec_info, connection->a2dp_source_local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1070 avdtp_config_atrac_set_sampling_frequency(connection->a2dp_source_local_stream_endpoint->media_codec_info, sampling_frequency); 1071 break; 1072 default: 1073 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1074 } 1075 1076 avdtp_capabilities_t new_configuration; 1077 new_configuration.media_codec.media_type = AVDTP_AUDIO; 1078 new_configuration.media_codec.media_codec_type = codec_type; 1079 new_configuration.media_codec.media_codec_information_len = codec_info_len; 1080 new_configuration.media_codec.media_codec_information = connection->a2dp_source_local_stream_endpoint->media_codec_info; 1081 1082 // start reconfigure 1083 connection->a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 1084 1085 return avdtp_source_reconfigure( 1086 avdtp_cid, 1087 avdtp_stream_endpoint_seid(connection->a2dp_source_local_stream_endpoint), 1088 connection->a2dp_source_local_stream_endpoint->remote_sep.seid, 1089 1 << AVDTP_MEDIA_CODEC, 1090 new_configuration 1091 ); 1092 } 1093 1094 static uint8_t a2dp_source_media_config_validator_callback(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size){ 1095 uint8_t error = 0; 1096 if (a2dp_source_media_config_validator != NULL) { 1097 // update subevent id and call validator 1098 uint8_t avdtp_subevent_id = event[2]; 1099 uint8_t a2dp_subevent_id = a2dp_subevent_id_for_avdtp_subevent_id(avdtp_subevent_id); 1100 uint8_t * subevent_field = (uint8_t *) &event[2]; 1101 *subevent_field = a2dp_subevent_id; 1102 error = (*a2dp_source_media_config_validator)(stream_endpoint, event, size); 1103 *subevent_field = avdtp_subevent_id; 1104 } 1105 return error; 1106 } 1107 1108 void a2dp_source_register_media_config_validator(uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size)){ 1109 a2dp_source_media_config_validator = callback; 1110 avdtp_source_register_media_config_validator(&a2dp_source_media_config_validator_callback); 1111 } 1112 1113