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 static bool send_stream_established_for_outgoing_connection = false; 63 static bool discover_seps_in_process = false; 64 static bool stream_endpoint_configured = false; 65 66 static avdtp_stream_endpoint_context_t sc; 67 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 68 static int num_remote_seps = 0; 69 static btstack_packet_handler_t a2dp_source_packet_handler_user; 70 71 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 72 static void a2dp_discovere_seps_with_next_waiting_connection(void); 73 74 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){ 75 uint8_t* attribute; 76 de_create_sequence(service); 77 78 // 0x0000 "Service Record Handle" 79 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 80 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 81 82 // 0x0001 "Service Class ID List" 83 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 84 attribute = de_push_sequence(service); 85 { 86 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 87 } 88 de_pop_sequence(service, attribute); 89 90 // 0x0004 "Protocol Descriptor List" 91 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 92 attribute = de_push_sequence(service); 93 { 94 uint8_t* l2cpProtocol = de_push_sequence(attribute); 95 { 96 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 97 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 98 } 99 de_pop_sequence(attribute, l2cpProtocol); 100 101 uint8_t* avProtocol = de_push_sequence(attribute); 102 { 103 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 104 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 105 } 106 de_pop_sequence(attribute, avProtocol); 107 } 108 de_pop_sequence(service, attribute); 109 110 // 0x0005 "Public Browse Group" 111 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 112 attribute = de_push_sequence(service); 113 { 114 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 115 } 116 de_pop_sequence(service, attribute); 117 118 // 0x0009 "Bluetooth Profile Descriptor List" 119 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 120 attribute = de_push_sequence(service); 121 { 122 uint8_t *a2dProfile = de_push_sequence(attribute); 123 { 124 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 125 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 126 } 127 de_pop_sequence(attribute, a2dProfile); 128 } 129 de_pop_sequence(service, attribute); 130 131 132 // 0x0100 "Service Name" 133 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 134 if (service_name){ 135 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 136 } else { 137 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 138 } 139 140 // 0x0100 "Provider Name" 141 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 142 if (service_provider_name){ 143 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 144 } else { 145 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 146 } 147 148 // 0x0311 "Supported Features" 149 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 150 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 151 } 152 153 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 154 uint8_t event[7]; 155 int pos = 0; 156 event[pos++] = HCI_EVENT_A2DP_META; 157 event[pos++] = sizeof(event) - 2; 158 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 159 little_endian_store_16(event, pos, cid); 160 pos += 2; 161 event[pos++] = local_seid; 162 event[pos++] = status; 163 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 164 } 165 166 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 167 if (stream_endpoint_configured) return; 168 169 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 170 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 171 172 if (connection == NULL || connection->a2dp_source_state != A2DP_CONNECTED) { 173 a2dp_discovere_seps_with_next_waiting_connection(); 174 return; 175 } 176 177 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 178 avdtp_source_discover_stream_endpoints(avdtp_cid); 179 } 180 181 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 182 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 183 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 184 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 185 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 186 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 187 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 188 } 189 190 static void a2dp_source_set_config_timer_stop(void){ 191 log_info("a2dp_source_set_config_timer_stop"); 192 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 193 } 194 195 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 196 discover_seps_in_process = true; 197 sc.active_remote_sep_index = 0; 198 num_remote_seps = 0; 199 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 200 201 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 202 if (connection->a2dp_source_state == A2DP_W4_CONNECTED){ 203 log_info("A2DP singnaling connection: discover seps"); 204 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 205 avdtp_source_discover_stream_endpoints(connection->avdtp_cid); 206 } else { 207 log_info("A2DP singnaling connection: wait a bit, then discover seps"); 208 connection->a2dp_source_state = A2DP_CONNECTED; 209 a2dp_source_set_config_timer_start(connection->avdtp_cid); 210 } 211 } 212 213 static void a2dp_discovere_seps_with_next_waiting_connection(void){ 214 discover_seps_in_process = false; 215 216 btstack_linked_list_iterator_t it; 217 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 218 while (btstack_linked_list_iterator_has_next(&it)){ 219 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 220 if (!next_connection->a2dp_source_discover_seps) continue; 221 a2dp_start_discovering_seps(next_connection); 222 } 223 } 224 225 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 226 UNUSED(channel); 227 UNUSED(size); 228 229 uint16_t cid; 230 avdtp_connection_t * connection; 231 232 uint8_t signal_identifier; 233 uint8_t status; 234 uint8_t local_seid; 235 uint8_t remote_seid; 236 bd_addr_t address; 237 238 if (packet_type != HCI_EVENT_PACKET) return; 239 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 240 241 switch (packet[2]){ 242 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 243 if (stream_endpoint_configured) return; 244 if (sc.local_stream_endpoint == NULL) return; 245 246 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 247 connection = avdtp_get_connection_for_avdtp_cid(cid); 248 btstack_assert(connection != NULL); 249 250 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 251 252 status = avdtp_subevent_signaling_connection_established_get_status(packet); 253 if (status != ERROR_CODE_SUCCESS){ 254 connection->a2dp_source_state = A2DP_IDLE; 255 256 // only care for outgoing connections 257 if (!send_stream_established_for_outgoing_connection) break; 258 send_stream_established_for_outgoing_connection = false; 259 log_info("A2DP source singnaling connection failed status %d", status); 260 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 261 break; 262 } 263 log_info("A2DP source singnaling connection established avdtp_cid 0x%02x", cid); 264 265 if (discover_seps_in_process){ 266 connection->a2dp_source_discover_seps = true; 267 break; 268 } 269 270 a2dp_start_discovering_seps(connection); 271 // notify app 272 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 273 break; 274 275 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 276 btstack_assert(sc.local_stream_endpoint != NULL); 277 278 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 279 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 280 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 281 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seps[sc.active_remote_sep_index].seid ); 282 283 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 284 connection = avdtp_get_connection_for_avdtp_cid(cid); 285 btstack_assert(connection != NULL); 286 287 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)); 288 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)); 289 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)); 290 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 291 292 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)); 293 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)); 294 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)); 295 296 297 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 298 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 299 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 300 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 301 302 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 303 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 304 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 305 306 connection->a2dp_source_state = A2DP_W2_SET_CONFIGURATION; 307 break; 308 309 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 310 log_info("received non SBC codec. not implemented"); 311 break; 312 313 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 314 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)); 315 break; 316 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 317 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 318 break; 319 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 320 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 321 break; 322 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 323 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)); 324 break; 325 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 326 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)); 327 break; 328 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 329 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 330 break; 331 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 332 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 333 break; 334 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 335 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 336 connection = avdtp_get_connection_for_avdtp_cid(cid); 337 btstack_assert(connection != NULL); 338 339 if (connection->a2dp_source_state == A2DP_W2_GET_CAPABILITIES){ 340 // endpoint was not suitable, check next one 341 sc.active_remote_sep_index++; 342 if (sc.active_remote_sep_index >= num_remote_seps){ 343 // we didn't find a suitable SBC stream endpoint, sorry. 344 connection->a2dp_source_state = A2DP_CONNECTED; 345 connection->a2dp_source_discover_seps = false; 346 347 a2dp_discovere_seps_with_next_waiting_connection(); 348 } 349 } 350 break; 351 352 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 353 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 354 break; 355 356 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 357 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 358 connection = avdtp_get_connection_for_avdtp_cid(cid); 359 btstack_assert(connection != NULL); 360 361 a2dp_source_set_config_timer_stop(); 362 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 363 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 364 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 365 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 366 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 367 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 368 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 369 370 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)); 371 connection->a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 372 discover_seps_in_process = false; 373 stream_endpoint_configured = true; 374 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 375 break; 376 377 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 378 break; 379 380 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 381 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 382 break; 383 384 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 385 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 386 connection = avdtp_get_connection_for_avdtp_cid(cid); 387 btstack_assert(connection != NULL); 388 389 // about to notify client 390 send_stream_established_for_outgoing_connection = false; 391 392 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 393 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 394 status = avdtp_subevent_streaming_connection_established_get_status(packet); 395 if (status != ERROR_CODE_SUCCESS){ 396 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 397 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 398 break; 399 } 400 401 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 402 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 403 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 404 break; 405 406 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 407 avdtp_sep_t sep; 408 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 409 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 410 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 411 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 412 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s, index %d", 413 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", num_remote_seps); 414 if (sep.type == AVDTP_SINK){ 415 remote_seps[num_remote_seps++] = sep; 416 } 417 break; 418 } 419 420 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 421 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 422 connection = avdtp_get_connection_for_avdtp_cid(cid); 423 btstack_assert(connection != NULL); 424 425 if (num_remote_seps > 0){ 426 connection->a2dp_source_state = A2DP_W2_GET_CAPABILITIES; 427 sc.active_remote_sep_index = 0; 428 } else { 429 connection->a2dp_source_state = A2DP_CONNECTED; 430 connection->a2dp_source_discover_seps = false; 431 432 a2dp_discovere_seps_with_next_waiting_connection(); 433 } 434 break; 435 436 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 437 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 438 connection = avdtp_get_connection_for_avdtp_cid(cid); 439 btstack_assert(connection != NULL); 440 btstack_assert(sc.local_stream_endpoint != NULL); 441 442 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 443 444 log_info("A2DP cmd %s accepted, state %x, is_initiator %u, cid 0x%2x, local seid %d", avdtp_si2str(signal_identifier), connection->a2dp_source_state, 445 avdtp_subevent_signaling_accept_get_is_initiator(packet), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 446 447 switch (connection->a2dp_source_state){ 448 case A2DP_W2_GET_CAPABILITIES: 449 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 450 log_info("A2DP get capabilities for remote seid %d", remote_seid); 451 avdtp_source_get_capabilities(cid, remote_seid); 452 break; 453 454 case A2DP_W2_SET_CONFIGURATION: 455 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 456 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); 457 connection->a2dp_source_state = A2DP_CONNECTED; 458 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); 459 break; 460 461 case A2DP_W2_RECONFIGURE_WITH_SEID: 462 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); 463 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 464 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 465 break; 466 467 case A2DP_W2_OPEN_STREAM_WITH_SEID: 468 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); 469 connection->a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 470 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 471 break; 472 473 case A2DP_STREAMING_OPENED: 474 switch (signal_identifier){ 475 case AVDTP_SI_START: 476 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 477 break; 478 case AVDTP_SI_SUSPEND: 479 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 480 break; 481 case AVDTP_SI_ABORT: 482 case AVDTP_SI_CLOSE: 483 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 484 break; 485 default: 486 break; 487 } 488 break; 489 default: 490 connection->a2dp_source_state = A2DP_CONNECTED; 491 break; 492 } 493 break; 494 495 case AVDTP_SUBEVENT_SIGNALING_REJECT: 496 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 497 connection = avdtp_get_connection_for_avdtp_cid(cid); 498 btstack_assert(connection != NULL); 499 500 connection->a2dp_source_state = A2DP_CONNECTED; 501 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 502 break; 503 504 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 505 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 506 connection = avdtp_get_connection_for_avdtp_cid(cid); 507 btstack_assert(connection != NULL); 508 509 connection->a2dp_source_state = A2DP_CONNECTED; 510 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 511 break; 512 513 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 514 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 515 connection = avdtp_get_connection_for_avdtp_cid(cid); 516 btstack_assert(connection != NULL); 517 518 connection->a2dp_source_state = A2DP_CONFIGURED; 519 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 520 break; 521 522 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 523 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 524 connection = avdtp_get_connection_for_avdtp_cid(cid); 525 btstack_assert(connection != NULL); 526 527 stream_endpoint_configured = false; 528 if (send_stream_established_for_outgoing_connection){ 529 send_stream_established_for_outgoing_connection = false; 530 log_info("A2DP source outgoing connnection failed - disconnect"); 531 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 532 break; 533 } 534 535 connection->a2dp_source_state = A2DP_IDLE; 536 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 537 break; 538 539 default: 540 break; 541 } 542 } 543 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 544 btstack_assert(callback != NULL); 545 546 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 547 a2dp_source_packet_handler_user = callback; 548 } 549 550 void a2dp_source_init(void){ 551 avdtp_source_init(); 552 } 553 554 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 555 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 556 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 557 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 558 if (!local_stream_endpoint){ 559 return NULL; 560 } 561 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 562 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 563 codec_capabilities, codec_capabilities_len); 564 565 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 566 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 567 sc.local_stream_endpoint = local_stream_endpoint; 568 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 569 return local_stream_endpoint; 570 } 571 572 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 573 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 574 if (!sc.local_stream_endpoint){ 575 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 576 } 577 578 uint8_t status = avdtp_source_connect(remote_addr, avdtp_cid); 579 if (status != ERROR_CODE_SUCCESS) return status; 580 581 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(*avdtp_cid); 582 btstack_assert(connection != NULL); 583 584 send_stream_established_for_outgoing_connection = true; 585 connection->a2dp_source_state = A2DP_W4_CONNECTED; 586 return ERROR_CODE_SUCCESS; 587 } 588 589 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 590 return avdtp_disconnect(avdtp_cid); 591 } 592 593 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 594 btstack_assert(sc.local_stream_endpoint != NULL); 595 596 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 597 if (connection == NULL) ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 598 599 log_info("a2dp_source_reconfigure_stream"); 600 601 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 602 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 603 4); 604 605 // update sampling frequency 606 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 607 switch (sampling_frequency){ 608 case 48000: 609 config |= (AVDTP_SBC_48000 << 4); 610 break; 611 case 44100: 612 config |= (AVDTP_SBC_44100 << 4); 613 break; 614 case 32000: 615 config |= (AVDTP_SBC_32000 << 4); 616 break; 617 case 16000: 618 config |= (AVDTP_SBC_16000 << 4); 619 break; 620 default: 621 log_error("Unsupported sampling frequency %u", sampling_frequency); 622 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 623 } 624 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 625 626 avdtp_capabilities_t new_configuration; 627 new_configuration.media_codec.media_type = AVDTP_AUDIO; 628 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 629 new_configuration.media_codec.media_codec_information_len = 4; 630 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 631 632 // start reconfigure 633 connection->a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 634 635 return avdtp_source_reconfigure( 636 avdtp_cid, 637 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 638 sc.local_stream_endpoint->remote_sep.seid, 639 1 << AVDTP_MEDIA_CODEC, 640 new_configuration 641 ); 642 } 643 644 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 645 return avdtp_start_stream(avdtp_cid, local_seid); 646 } 647 648 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 649 return avdtp_suspend_stream(avdtp_cid, local_seid); 650 } 651 652 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 653 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 654 } 655 656 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 657 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 658 } 659 660 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){ 661 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 662 } 663