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 remote_seid; 275 276 if (packet_type != HCI_EVENT_PACKET) return; 277 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 278 279 switch (packet[2]){ 280 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 281 if (sc.local_stream_endpoint == NULL) return; 282 283 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 284 connection = avdtp_get_connection_for_avdtp_cid(cid); 285 btstack_assert(connection != NULL); 286 287 status = avdtp_subevent_signaling_connection_established_get_status(packet); 288 if (status != ERROR_CODE_SUCCESS){ 289 // notify about connection error only if we're initiator 290 if (outgoing_active && (a2dp_source_cid == cid)){ 291 log_info("A2DP source signaling connection failed status 0x%02x", status); 292 outgoing_active = false; 293 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 294 } 295 break; 296 } 297 log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid); 298 299 // notify app 300 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 301 302 // we already have a valid setup 303 if (stream_endpoint_configured) return; 304 305 // start discover seps now if: 306 // - outgoing active: signaling for outgoing connection 307 // - outgoing not active: incoming connection and no sep discover ongoing 308 309 log_info("outgoing_active %d, current avdtp cid 0x%02x, a2dp_source_state %d", outgoing_active, cid, a2dp_source_state); 310 if ((outgoing_active && (a2dp_source_cid == cid)) || (!outgoing_active && (a2dp_source_state == A2DP_IDLE))){ 311 a2dp_start_discovering_seps(connection); 312 } else { 313 // post-pone sep discovery 314 connection->a2dp_source_discover_seps = true; 315 } 316 break; 317 318 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 319 cid = avdtp_subevent_signaling_sep_found_get_avdtp_cid(packet); 320 if (a2dp_source_cid != cid) break; 321 if (a2dp_source_state == A2DP_DISCOVER_SEPS) { 322 avdtp_sep_t sep; 323 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 324 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 325 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 326 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 327 log_info("A2DP Found sep: remote seid 0x%02x, in_use %d, media type %d, sep type %s, index %d", 328 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", 329 num_remote_seps); 330 if (sep.type == AVDTP_SINK) { 331 remote_seps[num_remote_seps++] = sep; 332 } 333 } 334 break; 335 336 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 337 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 338 if (a2dp_source_cid != cid) break; 339 if (a2dp_source_state != A2DP_DISCOVER_SEPS) break; 340 341 connection = avdtp_get_connection_for_avdtp_cid(cid); 342 btstack_assert(connection != NULL); 343 344 if (num_remote_seps > 0){ 345 a2dp_source_state = A2DP_GET_CAPABILITIES; 346 connection->supported_codecs_bitmap = 0; 347 sc.active_remote_sep_index = 0; 348 } else { 349 if (outgoing_active){ 350 outgoing_active = false; 351 connection = avdtp_get_connection_for_avdtp_cid(cid); 352 btstack_assert(connection != NULL); 353 a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 354 } 355 356 // continue 357 a2dp_discover_seps_with_next_waiting_connection(); 358 } 359 break; 360 361 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 362 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 363 if (a2dp_source_cid != cid) break; 364 if (a2dp_source_state == A2DP_GET_CAPABILITIES) { 365 366 log_info("A2DP received SBC capability, received: remote seid 0x%02x (expected: remote seid 0x%02x)", 367 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), remote_seps[sc.active_remote_sep_index].seid); 368 369 connection = avdtp_get_connection_for_avdtp_cid(cid); 370 btstack_assert(connection != NULL); 371 372 // choose SBC config params 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 // set media configuration 383 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 384 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 385 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 386 387 // select reserved SBC config buffer 388 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->media_codec_sbc_info; 389 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 4; 390 391 // store SBC configuration in reserved field 392 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 393 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 394 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 395 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 396 397 // suitable Sink SEP found, configure SEP 398 sep_found_w2_set_configuration = true; 399 connection->supported_codecs_bitmap |= (1 << AVDTP_CODEC_SBC); 400 } 401 402 // forward codec capability 403 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY); 404 break; 405 406 // forward codec capability 407 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY: 408 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY); 409 break; 410 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY: 411 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY); 412 break; 413 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY: 414 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY); 415 break; 416 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 417 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY); 418 break; 419 420 // not forwarded 421 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 422 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 423 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 424 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 425 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 426 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 427 break; 428 429 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 430 cid = avdtp_subevent_signaling_delay_reporting_capability_get_avdtp_cid(packet); 431 log_info("received AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, cid 0x%02x, state %d", cid, a2dp_source_state); 432 433 if (a2dp_source_cid != cid) break; 434 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 435 436 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_DELAY_REPORTING, 1); 437 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 438 break; 439 440 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 441 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 442 if (a2dp_source_cid != cid) break; 443 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 444 445 if (sep_found_w2_set_configuration){ 446 a2dp_source_state = A2DP_SET_CONFIGURATION; 447 sep_found_w2_set_configuration = false; 448 break; 449 } 450 // endpoint was not suitable, check next one 451 sc.active_remote_sep_index++; 452 if (sc.active_remote_sep_index >= num_remote_seps){ 453 // we didn't find a suitable SBC stream endpoint, sorry. 454 if (outgoing_active){ 455 outgoing_active = false; 456 connection = avdtp_get_connection_for_avdtp_cid(cid); 457 btstack_assert(connection != NULL); 458 a2dp_source_streaming_emit_connection_failed(connection, sc.local_stream_endpoint->sep.seid, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 459 } 460 a2dp_discover_seps_with_next_waiting_connection(); 461 } 462 break; 463 464 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 465 cid = avdtp_subevent_signaling_delay_report_get_avdtp_cid(packet); 466 if (a2dp_source_cid != cid) break; 467 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 468 break; 469 470 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 471 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 472 473 if ((a2dp_source_cid == cid) && (a2dp_source_state == A2DP_W4_SET_CONFIGURATION)){ 474 // outgoing: discovery and config of remote sink sep successful, trigger stream open 475 a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 476 } else { 477 // incoming: accept cid and wait for stream open 478 a2dp_source_cid = cid; 479 a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 480 } 481 482 // config set: stop timer 483 a2dp_source_set_config_timer_stop(); 484 stream_endpoint_configured = true; 485 486 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 487 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 488 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 489 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 490 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 491 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 492 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 493 494 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)); 495 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 496 break; 497 498 // forward codec configuration 499 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION: 500 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION); 501 break; 502 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION: 503 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION); 504 break; 505 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION: 506 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION); 507 break; 508 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 509 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION); 510 break; 511 512 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 513 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 514 break; 515 516 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 517 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 518 if (a2dp_source_cid != cid) break; 519 if (a2dp_source_state != A2DP_W4_OPEN_STREAM_WITH_SEID) break; 520 521 outgoing_active = false; 522 status = avdtp_subevent_streaming_connection_established_get_status(packet); 523 if (status != ERROR_CODE_SUCCESS){ 524 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 525 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 526 break; 527 } 528 529 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid 0x%02x, remote seid 0x%02x", cid, 530 avdtp_subevent_streaming_connection_established_get_local_seid(packet), 531 avdtp_subevent_streaming_connection_established_get_remote_seid(packet)); 532 a2dp_source_state = A2DP_STREAMING_OPENED; 533 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 534 break; 535 536 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 537 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 538 539 // reset discovery timer while remote is active 540 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) { 541 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(&a2dp_source_set_config_timer); 542 if ((avdtp_cid == 0) || (avdtp_cid != cid)) break; 543 log_info("Reset discovery timer"); 544 a2dp_source_set_config_timer_start(avdtp_cid); 545 break; 546 } 547 548 if (a2dp_source_cid != cid) break; 549 550 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 551 552 log_info("A2DP cmd %s accepted, global state %d, cid 0x%02x", avdtp_si2str(signal_identifier), a2dp_source_state, cid); 553 554 switch (a2dp_source_state){ 555 case A2DP_GET_CAPABILITIES: 556 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 557 log_info("A2DP get capabilities for remote seid 0x%02x", remote_seid); 558 avdtp_source_get_all_capabilities(cid, remote_seid); 559 return; 560 561 case A2DP_SET_CONFIGURATION: 562 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 563 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); 564 a2dp_source_state = A2DP_W4_SET_CONFIGURATION; 565 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); 566 return; 567 568 case A2DP_W2_OPEN_STREAM_WITH_SEID: 569 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); 570 a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 571 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 572 break; 573 574 case A2DP_W2_RECONFIGURE_WITH_SEID: 575 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); 576 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 577 a2dp_source_state = A2DP_STREAMING_OPENED; 578 break; 579 580 case A2DP_STREAMING_OPENED: 581 switch (signal_identifier){ 582 case AVDTP_SI_START: 583 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 584 break; 585 case AVDTP_SI_SUSPEND: 586 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 587 break; 588 case AVDTP_SI_ABORT: 589 case AVDTP_SI_CLOSE: 590 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 591 break; 592 default: 593 break; 594 } 595 break; 596 597 default: 598 break; 599 } 600 break; 601 602 case AVDTP_SUBEVENT_SIGNALING_REJECT: 603 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 604 if (a2dp_source_cid != cid) break; 605 if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break; 606 607 a2dp_source_state = A2DP_CONNECTED; 608 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 609 break; 610 611 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 612 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 613 if (a2dp_source_cid != cid) break; 614 if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break; 615 616 a2dp_source_state = A2DP_CONNECTED; 617 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 618 break; 619 620 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 621 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 622 if (a2dp_source_cid != cid) break; 623 624 a2dp_source_state = A2DP_CONFIGURED; 625 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 626 break; 627 628 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 629 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 630 // connect/release are passed on to app 631 if (a2dp_source_cid == cid){ 632 stream_endpoint_configured = false; 633 a2dp_source_state = A2DP_IDLE; 634 a2dp_source_cid = 0; 635 } 636 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 637 break; 638 639 default: 640 break; 641 } 642 } 643 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 644 btstack_assert(callback != NULL); 645 646 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 647 a2dp_source_packet_handler_user = callback; 648 } 649 650 void a2dp_source_init(void){ 651 avdtp_source_init(); 652 } 653 654 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 655 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 656 uint8_t * codec_configuration, uint16_t codec_configuration_len){ 657 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 658 if (!local_stream_endpoint){ 659 return NULL; 660 } 661 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 662 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 663 codec_capabilities, codec_capabilities_len); 664 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 665 666 // store user codec configuration buffer 667 local_stream_endpoint->media_codec_configuration_info = codec_configuration; 668 local_stream_endpoint->media_codec_configuration_len = codec_configuration_len; 669 670 sc.local_stream_endpoint = local_stream_endpoint; 671 return local_stream_endpoint; 672 } 673 674 void a2dp_source_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 675 avdtp_source_finalize_stream_endpoint(stream_endpoint); 676 } 677 678 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 679 if (outgoing_active || stream_endpoint_configured) { 680 return ERROR_CODE_COMMAND_DISALLOWED; 681 } 682 683 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 684 if (!sc.local_stream_endpoint){ 685 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 686 } 687 688 uint16_t outgoing_cid; 689 690 outgoing_active = true; 691 uint8_t status = avdtp_source_connect(remote_addr, &outgoing_cid); 692 if (status != ERROR_CODE_SUCCESS) { 693 // if there's already a connection for for remote addr, avdtp_source_connect fails, 694 // but the stream will get set-up nevertheless 695 outgoing_active = false; 696 return status; 697 } 698 699 // stop sep discovery for other 700 if (a2dp_source_state != A2DP_IDLE){ 701 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_source_cid); 702 if (connection != NULL){ 703 // sdp discovery has started: post-pone action, reserve sep discovery mechanism 704 connection->a2dp_source_discover_seps = true; 705 } 706 } 707 708 // setup state 709 a2dp_source_state = A2DP_W4_CONNECTED; 710 a2dp_source_cid = outgoing_cid; 711 *avdtp_cid = outgoing_cid; 712 713 return ERROR_CODE_SUCCESS; 714 } 715 716 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 717 return avdtp_disconnect(avdtp_cid); 718 } 719 720 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 721 btstack_assert(sc.local_stream_endpoint != NULL); 722 723 if (a2dp_source_cid != avdtp_cid){ 724 return ERROR_CODE_COMMAND_DISALLOWED; 725 } 726 727 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 728 if (connection == NULL){ 729 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 730 } 731 732 if (a2dp_source_state != A2DP_STREAMING_OPENED) { 733 return ERROR_CODE_COMMAND_DISALLOWED; 734 } 735 736 log_info("Reconfigure avdtp_cid 0x%02x", avdtp_cid); 737 738 (void)memcpy(sc.local_stream_endpoint->media_codec_sbc_info, 739 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 740 4); 741 742 // update sampling frequency 743 uint8_t config = sc.local_stream_endpoint->media_codec_sbc_info[0] & 0x0f; 744 switch (sampling_frequency){ 745 case 48000: 746 config |= (AVDTP_SBC_48000 << 4); 747 break; 748 case 44100: 749 config |= (AVDTP_SBC_44100 << 4); 750 break; 751 case 32000: 752 config |= (AVDTP_SBC_32000 << 4); 753 break; 754 case 16000: 755 config |= (AVDTP_SBC_16000 << 4); 756 break; 757 default: 758 log_error("Unsupported sampling frequency %u", (int) sampling_frequency); 759 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 760 } 761 sc.local_stream_endpoint->media_codec_sbc_info[0] = config; 762 763 avdtp_capabilities_t new_configuration; 764 new_configuration.media_codec.media_type = AVDTP_AUDIO; 765 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 766 new_configuration.media_codec.media_codec_information_len = 4; 767 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->media_codec_sbc_info; 768 769 // start reconfigure 770 a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 771 772 return avdtp_source_reconfigure( 773 avdtp_cid, 774 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 775 sc.local_stream_endpoint->remote_sep.seid, 776 1 << AVDTP_MEDIA_CODEC, 777 new_configuration 778 ); 779 } 780 781 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 782 return avdtp_start_stream(avdtp_cid, local_seid); 783 } 784 785 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 786 return avdtp_suspend_stream(avdtp_cid, local_seid); 787 } 788 789 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 790 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 791 } 792 793 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 794 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 795 } 796 797 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){ 798 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 799 } 800