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