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