1 2 /* 3 * Copyright (C) 2016 BlueKitchen GmbH 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the copyright holders nor the names of 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 4. Any redistribution, use, or modification is done solely for 18 * personal benefit and not for any commercial purpose or for 19 * monetary gain. 20 * 21 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 25 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 31 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Please inquire about commercial licensing options at 35 * [email protected] 36 * 37 */ 38 39 /** 40 * Supported use cases: 41 * - single incoming connection: sep discovery starts and stream will get setup if remote sink sep with SBC is found 42 * - single outgoing connection: see above 43 * - outgoing and incoming connection to same device: 44 * - if outgoing is triggered first, incoming will get ignored. 45 * - if incoming starts first, start ougoing will fail, but incoming will succeed. 46 * - outgoing and incoming connections to different devices: 47 * - if outgoing is first, incoming gets ignored. 48 * - if incoming starts first SEP discovery will get stopped and outgoing will succeed. 49 */ 50 51 #define BTSTACK_FILE__ "a2dp_source.c" 52 53 #include <stdint.h> 54 #include <string.h> 55 56 #include "bluetooth_psm.h" 57 #include "bluetooth_sdp.h" 58 #include "btstack_debug.h" 59 #include "btstack_event.h" 60 #include "classic/a2dp_source.h" 61 #include "classic/avdtp_source.h" 62 #include "classic/avdtp_util.h" 63 #include "classic/sdp_util.h" 64 #include "l2cap.h" 65 66 #define AVDTP_MAX_SEP_NUM 10 67 #define A2DP_SET_CONFIG_DELAY_MS 150 68 69 typedef struct { 70 avdtp_stream_endpoint_t * local_stream_endpoint; 71 uint8_t active_remote_sep_index; 72 } avdtp_stream_endpoint_context_t; 73 74 75 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 76 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 77 78 static btstack_timer_source_t a2dp_source_set_config_timer; 79 80 static bool outgoing_active; 81 82 // discover remote seps 83 static a2dp_state_t a2dp_source_state = A2DP_IDLE; 84 static uint16_t a2dp_source_cid; 85 static uint16_t num_remote_seps = 0; 86 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 87 88 static bool a2dp_source_have_config; 89 90 static bool stream_endpoint_configured = false; 91 92 static avdtp_stream_endpoint_context_t sc; 93 static btstack_packet_handler_t a2dp_source_packet_handler_user; 94 95 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 96 static void a2dp_discover_seps_with_next_waiting_connection(void); 97 98 static void a2dp_source_streaming_emit_connection_failed(avdtp_connection_t *connection, uint8_t status) { 99 uint8_t event[14]; 100 int pos = 0; 101 event[pos++] = HCI_EVENT_A2DP_META; 102 event[pos++] = sizeof(event) - 2; 103 event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 104 little_endian_store_16(event, pos, connection->avdtp_cid); 105 pos += 2; 106 reverse_bd_addr(connection->remote_addr, &event[pos]); 107 pos += 6; 108 event[pos++] = 0; 109 event[pos++] = 0; 110 event[pos++] = status; 111 112 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 113 } 114 115 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){ 116 uint8_t* attribute; 117 de_create_sequence(service); 118 119 // 0x0000 "Service Record Handle" 120 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 121 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 122 123 // 0x0001 "Service Class ID List" 124 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 125 attribute = de_push_sequence(service); 126 { 127 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 128 } 129 de_pop_sequence(service, attribute); 130 131 // 0x0004 "Protocol Descriptor List" 132 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 133 attribute = de_push_sequence(service); 134 { 135 uint8_t* l2cpProtocol = de_push_sequence(attribute); 136 { 137 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 138 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 139 } 140 de_pop_sequence(attribute, l2cpProtocol); 141 142 uint8_t* avProtocol = de_push_sequence(attribute); 143 { 144 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 145 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 146 } 147 de_pop_sequence(attribute, avProtocol); 148 } 149 de_pop_sequence(service, attribute); 150 151 // 0x0005 "Public Browse Group" 152 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 153 attribute = de_push_sequence(service); 154 { 155 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 156 } 157 de_pop_sequence(service, attribute); 158 159 // 0x0009 "Bluetooth Profile Descriptor List" 160 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 161 attribute = de_push_sequence(service); 162 { 163 uint8_t *a2dProfile = de_push_sequence(attribute); 164 { 165 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 166 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 167 } 168 de_pop_sequence(attribute, a2dProfile); 169 } 170 de_pop_sequence(service, attribute); 171 172 173 // 0x0100 "Service Name" 174 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 175 if (service_name){ 176 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 177 } else { 178 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 179 } 180 181 // 0x0100 "Provider Name" 182 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 183 if (service_provider_name){ 184 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 185 } else { 186 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 187 } 188 189 // 0x0311 "Supported Features" 190 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 191 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 192 } 193 194 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 195 uint8_t event[7]; 196 int pos = 0; 197 event[pos++] = HCI_EVENT_A2DP_META; 198 event[pos++] = sizeof(event) - 2; 199 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 200 little_endian_store_16(event, pos, cid); 201 pos += 2; 202 event[pos++] = local_seid; 203 event[pos++] = status; 204 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 205 } 206 207 static void a2dp_source_discover_stream_endpoints(uint16_t avdtp_cid){ 208 a2dp_source_cid = avdtp_cid; 209 avdtp_source_discover_stream_endpoints(avdtp_cid); 210 } 211 212 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 213 if (stream_endpoint_configured) return; 214 215 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 216 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 217 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL); 218 219 if (connection == NULL) { 220 log_info("a2dp_discover_seps_with_next_waiting_connection"); 221 a2dp_discover_seps_with_next_waiting_connection(); 222 return; 223 } 224 225 a2dp_source_discover_stream_endpoints(avdtp_cid); 226 } 227 228 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 229 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 230 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 231 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 232 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 233 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 234 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 235 } 236 237 static void a2dp_source_set_config_timer_stop(void){ 238 log_info("a2dp_source_set_config_timer_stop"); 239 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 240 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, NULL); 241 } 242 243 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 244 a2dp_source_state = A2DP_DISCOVER_SEPS; 245 sc.active_remote_sep_index = 0; 246 num_remote_seps = 0; 247 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 248 connection->a2dp_source_discover_seps = false; 249 250 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 251 if (outgoing_active && (a2dp_source_cid == connection->avdtp_cid)){ 252 log_info("discover seps"); 253 a2dp_source_discover_stream_endpoints(connection->avdtp_cid); 254 } else { 255 log_info("wait a bit, then discover seps"); 256 a2dp_source_set_config_timer_start(connection->avdtp_cid); 257 } 258 } 259 260 static void a2dp_discover_seps_with_next_waiting_connection(void){ 261 a2dp_source_state = A2DP_IDLE; 262 263 btstack_linked_list_iterator_t it; 264 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 265 while (btstack_linked_list_iterator_has_next(&it)){ 266 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 267 if (!next_connection->a2dp_source_discover_seps) continue; 268 a2dp_start_discovering_seps(next_connection); 269 } 270 } 271 272 static void a2dp_handle_received_configuration(const uint8_t *packet, uint8_t local_seid) { 273 uint16_t cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 274 if ((a2dp_source_cid == cid) && (a2dp_source_state == A2DP_W4_SET_CONFIGURATION)){ 275 // outgoing: discovery and config of remote sink sep successful, trigger stream open 276 a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 277 } else { 278 // incoming: accept cid, lookup local stream endpoint and wait for stream open 279 a2dp_source_cid = cid; 280 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 281 btstack_assert(sc.local_stream_endpoint != NULL); 282 a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 283 } 284 285 // config set: stop timer 286 a2dp_source_set_config_timer_stop(); 287 stream_endpoint_configured = true; 288 } 289 290 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 291 UNUSED(channel); 292 UNUSED(size); 293 294 uint16_t cid; 295 avdtp_connection_t * connection; 296 297 uint8_t signal_identifier; 298 uint8_t status; 299 uint8_t local_seid; 300 uint8_t remote_seid; 301 302 if (packet_type != HCI_EVENT_PACKET) return; 303 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 304 305 switch (packet[2]){ 306 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 307 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 308 connection = avdtp_get_connection_for_avdtp_cid(cid); 309 btstack_assert(connection != NULL); 310 311 status = avdtp_subevent_signaling_connection_established_get_status(packet); 312 if (status != ERROR_CODE_SUCCESS){ 313 // notify about connection error only if we're initiator 314 if (outgoing_active && (a2dp_source_cid == cid)){ 315 log_info("A2DP source signaling connection failed status 0x%02x", status); 316 outgoing_active = false; 317 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 318 } 319 break; 320 } 321 log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid); 322 323 // notify app 324 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 325 326 // we already have a valid setup 327 if (stream_endpoint_configured) return; 328 329 // start discover seps now if: 330 // - outgoing active: signaling for outgoing connection 331 // - outgoing not active: incoming connection and no sep discover ongoing 332 333 log_info("outgoing_active %d, current avdtp cid 0x%02x, a2dp_source_state %d", outgoing_active, cid, a2dp_source_state); 334 if ((outgoing_active && (a2dp_source_cid == cid)) || (!outgoing_active && (a2dp_source_state == A2DP_IDLE))){ 335 a2dp_start_discovering_seps(connection); 336 } else { 337 // post-pone sep discovery 338 connection->a2dp_source_discover_seps = true; 339 } 340 break; 341 342 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 343 cid = avdtp_subevent_signaling_sep_found_get_avdtp_cid(packet); 344 if (a2dp_source_cid != cid) break; 345 if (a2dp_source_state == A2DP_DISCOVER_SEPS) { 346 avdtp_sep_t sep; 347 memset(&sep, 0, sizeof(avdtp_sep_t)); 348 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 349 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 350 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 351 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 352 log_info("A2DP Found sep: remote seid 0x%02x, in_use %d, media type %d, sep type %s, index %d", 353 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", 354 num_remote_seps); 355 if (sep.type == AVDTP_SINK) { 356 remote_seps[num_remote_seps++] = sep; 357 } 358 } 359 break; 360 361 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 362 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 363 if (a2dp_source_cid != cid) break; 364 if (a2dp_source_state != A2DP_DISCOVER_SEPS) break; 365 366 connection = avdtp_get_connection_for_avdtp_cid(cid); 367 btstack_assert(connection != NULL); 368 369 if (num_remote_seps > 0){ 370 a2dp_source_state = A2DP_GET_CAPABILITIES; 371 sc.active_remote_sep_index = 0; 372 a2dp_source_have_config = false; 373 } else { 374 if (outgoing_active){ 375 outgoing_active = false; 376 connection = avdtp_get_connection_for_avdtp_cid(cid); 377 btstack_assert(connection != NULL); 378 a2dp_source_streaming_emit_connection_failed(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 379 } 380 381 // continue 382 a2dp_discover_seps_with_next_waiting_connection(); 383 } 384 break; 385 386 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 387 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 388 if (a2dp_source_cid != cid) break; 389 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 390 391 // forward codec capability 392 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY); 393 394 // select SEP if none configured yet 395 if (a2dp_source_have_config == false){ 396 // find SBC stream endpoint 397 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_source_stream_endpoint_for_media_codec(AVDTP_CODEC_SBC); 398 if (stream_endpoint != NULL){ 399 // choose SBC config params 400 uint16_t sampling_frequency = avdtp_choose_sbc_sampling_frequency(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet)); 401 avdtp_channel_mode_t channel_mode = avdtp_choose_sbc_channel_mode(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet)); 402 uint8_t block_length = avdtp_choose_sbc_block_length(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_block_length_bitmap(packet)); 403 uint8_t subbands = avdtp_choose_sbc_subbands(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 404 avdtp_sbc_allocation_method_t allocation_method = avdtp_choose_sbc_allocation_method(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet)); 405 uint8_t max_bitpool_value = avdtp_choose_sbc_max_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet)); 406 uint8_t min_bitpool_value = avdtp_choose_sbc_min_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet)); 407 408 // and pre-select this endpoint 409 local_seid = avdtp_stream_endpoint_seid(stream_endpoint); 410 remote_seid = avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet); 411 a2dp_source_set_config_sbc(cid, local_seid, remote_seid, sampling_frequency, channel_mode, block_length, subbands, allocation_method, min_bitpool_value, max_bitpool_value); 412 } 413 } 414 break; 415 416 // forward codec capability 417 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY: 418 cid = avdtp_subevent_signaling_media_codec_mpeg_audio_capability_get_avdtp_cid(packet); 419 if (a2dp_source_cid != cid) break; 420 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 421 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY); 422 break; 423 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY: 424 cid = avdtp_subevent_signaling_media_codec_mpeg_aac_capability_get_avdtp_cid(packet); 425 if (a2dp_source_cid != cid) break; 426 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 427 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY); 428 break; 429 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY: 430 cid = avdtp_subevent_signaling_media_codec_atrac_capability_get_avdtp_cid(packet); 431 if (a2dp_source_cid != cid) break; 432 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 433 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY); 434 break; 435 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 436 cid = avdtp_subevent_signaling_media_codec_other_capability_get_avdtp_cid(packet); 437 if (a2dp_source_cid != cid) break; 438 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 439 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY); 440 break; 441 442 // not forwarded 443 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 444 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 445 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 446 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 447 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 448 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 449 break; 450 451 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 452 cid = avdtp_subevent_signaling_delay_reporting_capability_get_avdtp_cid(packet); 453 log_info("received AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, cid 0x%02x, state %d", cid, a2dp_source_state); 454 455 if (a2dp_source_cid != cid) break; 456 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 457 458 // store delay reporting capability 459 remote_seps[sc.active_remote_sep_index].registered_service_categories |= 1 << AVDTP_DELAY_REPORTING; 460 461 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 462 break; 463 464 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 465 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 466 if (a2dp_source_cid != cid) break; 467 if (a2dp_source_state != A2DP_GET_CAPABILITIES) break; 468 469 // forward capabilities done for endpoint 470 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE); 471 472 // endpoint was not suitable, check next one 473 sc.active_remote_sep_index++; 474 if (sc.active_remote_sep_index >= num_remote_seps){ 475 476 // emit 'all capabilities for all seps reported' 477 uint8_t event[6]; 478 uint8_t pos = 0; 479 event[pos++] = HCI_EVENT_A2DP_META; 480 event[pos++] = sizeof(event) - 2; 481 event[pos++] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_COMPLETE; 482 little_endian_store_16(event, pos, cid); 483 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 484 485 // do we have a valid config? 486 if (a2dp_source_have_config){ 487 a2dp_source_state = A2DP_SET_CONFIGURATION; 488 a2dp_source_have_config = false; 489 break; 490 } 491 492 // we didn't find a suitable SBC stream endpoint, sorry. 493 if (outgoing_active){ 494 outgoing_active = false; 495 connection = avdtp_get_connection_for_avdtp_cid(cid); 496 btstack_assert(connection != NULL); 497 a2dp_source_streaming_emit_connection_failed(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND); 498 } 499 a2dp_discover_seps_with_next_waiting_connection(); 500 } 501 break; 502 503 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 504 cid = avdtp_subevent_signaling_delay_report_get_avdtp_cid(packet); 505 if (a2dp_source_cid != cid) break; 506 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 507 break; 508 509 // forward codec configuration 510 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 511 local_seid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_local_seid(packet); 512 a2dp_handle_received_configuration(packet, local_seid); 513 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 514 break; 515 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION: 516 local_seid = avdtp_subevent_signaling_media_codec_mpeg_audio_configuration_get_local_seid(packet); 517 a2dp_handle_received_configuration(packet, local_seid); 518 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION); 519 break; 520 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION: 521 local_seid = avdtp_subevent_signaling_media_codec_mpeg_aac_configuration_get_local_seid(packet); 522 a2dp_handle_received_configuration(packet, local_seid); 523 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION); 524 break; 525 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION: 526 local_seid = avdtp_subevent_signaling_media_codec_atrac_configuration_get_local_seid(packet); 527 a2dp_handle_received_configuration(packet, local_seid); 528 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION); 529 break; 530 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 531 local_seid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_local_seid(packet); 532 a2dp_handle_received_configuration(packet, local_seid); 533 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION); 534 break; 535 536 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 537 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 538 break; 539 540 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 541 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 542 if (a2dp_source_cid != cid) break; 543 if (a2dp_source_state != A2DP_W4_OPEN_STREAM_WITH_SEID) break; 544 545 outgoing_active = false; 546 status = avdtp_subevent_streaming_connection_established_get_status(packet); 547 if (status != ERROR_CODE_SUCCESS){ 548 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 549 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 550 break; 551 } 552 553 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid 0x%02x, remote seid 0x%02x", cid, 554 avdtp_subevent_streaming_connection_established_get_local_seid(packet), 555 avdtp_subevent_streaming_connection_established_get_remote_seid(packet)); 556 a2dp_source_state = A2DP_STREAMING_OPENED; 557 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 558 break; 559 560 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 561 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 562 563 // reset discovery timer while remote is active 564 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) { 565 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(&a2dp_source_set_config_timer); 566 if ((avdtp_cid == 0) || (avdtp_cid != cid)) break; 567 log_info("Reset discovery timer"); 568 a2dp_source_set_config_timer_start(avdtp_cid); 569 break; 570 } 571 572 if (a2dp_source_cid != cid) break; 573 574 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 575 576 log_info("A2DP cmd %s accepted, global state %d, cid 0x%02x", avdtp_si2str(signal_identifier), a2dp_source_state, cid); 577 578 switch (a2dp_source_state){ 579 case A2DP_GET_CAPABILITIES: 580 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 581 log_info("A2DP get capabilities for remote seid 0x%02x", remote_seid); 582 avdtp_source_get_all_capabilities(cid, remote_seid); 583 return; 584 585 case A2DP_SET_CONFIGURATION: 586 remote_seid = sc.local_stream_endpoint->set_config_remote_seid; 587 log_info("A2DP initiate set configuration locally and wait for response ... local seid 0x%02x, remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid); 588 a2dp_source_state = A2DP_W4_SET_CONFIGURATION; 589 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); 590 return; 591 592 case A2DP_W2_OPEN_STREAM_WITH_SEID: 593 log_info("A2DP open stream ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 594 a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 595 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 596 break; 597 598 case A2DP_W2_RECONFIGURE_WITH_SEID: 599 log_info("A2DP reconfigured ... local seid 0x%02x, active remote seid 0x%02x", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 600 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 601 a2dp_source_state = A2DP_STREAMING_OPENED; 602 break; 603 604 case A2DP_STREAMING_OPENED: 605 switch (signal_identifier){ 606 case AVDTP_SI_START: 607 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 608 break; 609 case AVDTP_SI_SUSPEND: 610 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 611 break; 612 case AVDTP_SI_ABORT: 613 case AVDTP_SI_CLOSE: 614 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 615 break; 616 default: 617 break; 618 } 619 break; 620 621 default: 622 break; 623 } 624 break; 625 626 case AVDTP_SUBEVENT_SIGNALING_REJECT: 627 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 628 if (a2dp_source_cid != cid) break; 629 if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break; 630 631 a2dp_source_state = A2DP_CONNECTED; 632 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 633 break; 634 635 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 636 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 637 if (a2dp_source_cid != cid) break; 638 if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break; 639 640 a2dp_source_state = A2DP_CONNECTED; 641 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 642 break; 643 644 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 645 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 646 if (a2dp_source_cid != cid) break; 647 648 a2dp_source_state = A2DP_CONFIGURED; 649 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 650 break; 651 652 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 653 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 654 // connect/release are passed on to app 655 if (a2dp_source_cid == cid){ 656 stream_endpoint_configured = false; 657 sc.local_stream_endpoint = NULL; 658 a2dp_source_state = A2DP_IDLE; 659 a2dp_source_cid = 0; 660 } 661 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 662 break; 663 664 default: 665 break; 666 } 667 } 668 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 669 btstack_assert(callback != NULL); 670 671 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 672 a2dp_source_packet_handler_user = callback; 673 } 674 675 void a2dp_source_init(void){ 676 avdtp_source_init(); 677 } 678 679 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 680 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 681 uint8_t * codec_configuration, uint16_t codec_configuration_len){ 682 avdtp_stream_endpoint_t * stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 683 if (!stream_endpoint){ 684 return NULL; 685 } 686 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(stream_endpoint)); 687 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(stream_endpoint), media_type, media_codec_type, 688 codec_capabilities, codec_capabilities_len); 689 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(stream_endpoint)); 690 691 // store user codec configuration buffer 692 stream_endpoint->media_codec_type = media_codec_type; 693 stream_endpoint->media_codec_configuration_info = codec_configuration; 694 stream_endpoint->media_codec_configuration_len = codec_configuration_len; 695 696 return stream_endpoint; 697 } 698 699 void a2dp_source_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 700 avdtp_source_finalize_stream_endpoint(stream_endpoint); 701 } 702 703 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint16_t *avdtp_cid) { 704 if (outgoing_active || stream_endpoint_configured) { 705 return ERROR_CODE_COMMAND_DISALLOWED; 706 } 707 708 uint16_t outgoing_cid; 709 710 outgoing_active = true; 711 uint8_t status = avdtp_source_connect(remote_addr, &outgoing_cid); 712 if (status != ERROR_CODE_SUCCESS) { 713 // if there's already a connection for for remote addr, avdtp_source_connect fails, 714 // but the stream will get set-up nevertheless 715 outgoing_active = false; 716 return status; 717 } 718 719 // stop sep discovery for other 720 if (a2dp_source_state != A2DP_IDLE){ 721 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_source_cid); 722 if (connection != NULL){ 723 // sdp discovery has started: post-pone action, reserve sep discovery mechanism 724 connection->a2dp_source_discover_seps = true; 725 } 726 } 727 728 // setup state 729 a2dp_source_state = A2DP_W4_CONNECTED; 730 a2dp_source_cid = outgoing_cid; 731 *avdtp_cid = outgoing_cid; 732 733 return ERROR_CODE_SUCCESS; 734 } 735 736 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 737 return avdtp_disconnect(avdtp_cid); 738 } 739 740 741 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 742 return avdtp_start_stream(avdtp_cid, local_seid); 743 } 744 745 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 746 return avdtp_suspend_stream(avdtp_cid, local_seid); 747 } 748 749 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 750 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 751 } 752 753 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 754 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 755 } 756 757 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){ 758 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 759 } 760 761 uint8_t a2dp_source_stream_send_media_packet(uint16_t a2dp_cid, uint8_t local_seid, const uint8_t * packet, uint16_t size){ 762 return avdtp_source_stream_send_media_packet(a2dp_cid, local_seid, packet, size); 763 } 764 765 static void avdtp_config_sbc_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz){ 766 avdtp_sbc_sampling_frequency_t sampling_frequency; 767 switch (sampling_frequency_hz){ 768 case 16000: 769 sampling_frequency = AVDTP_SBC_16000; 770 break; 771 case 32000: 772 sampling_frequency = AVDTP_SBC_32000; 773 break; 774 case 48000: 775 sampling_frequency = AVDTP_SBC_48000; 776 break; 777 default: 778 sampling_frequency = AVDTP_SBC_44100; 779 break; 780 } 781 config[0] = (((uint8_t) sampling_frequency) << 4) | (config[0] & 0x0f); 782 } 783 784 static void avdtp_config_sbc_store(uint8_t * config, uint16_t sampling_frequency_hz, avdtp_channel_mode_t channel_mode, uint8_t block_length, uint8_t subbands, 785 avdtp_sbc_allocation_method_t allocation_method, uint8_t min_bitpool_value, uint8_t max_bitpool_value) { 786 avdtp_sbc_channel_mode_t sbc_channel_mode; 787 switch (channel_mode){ 788 case AVDTP_CHANNEL_MODE_MONO: 789 sbc_channel_mode = AVDTP_SBC_MONO; 790 break; 791 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 792 sbc_channel_mode = AVDTP_SBC_DUAL_CHANNEL; 793 break; 794 case AVDTP_CHANNEL_MODE_STEREO: 795 sbc_channel_mode = AVDTP_SBC_STEREO; 796 break; 797 default: 798 sbc_channel_mode = AVDTP_SBC_JOINT_STEREO; 799 break; 800 } 801 config[0] = (uint8_t) sbc_channel_mode; 802 config[1] = (block_length << 4) | (subbands << 2) | allocation_method; 803 config[2] = min_bitpool_value; 804 config[3] = max_bitpool_value; 805 avdtp_config_sbc_set_sampling_frequency(config, sampling_frequency_hz); 806 } 807 808 static void avdtp_config_mpeg_audio_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 809 uint8_t sampling_frequency_index = 0; 810 switch (sampling_frequency_hz){ 811 case 16000: 812 sampling_frequency_index = 5; 813 break; 814 case 22040: 815 sampling_frequency_index = 4; 816 break; 817 case 24000: 818 sampling_frequency_index = 3; 819 break; 820 case 32000: 821 sampling_frequency_index = 2; 822 break; 823 case 44100: 824 sampling_frequency_index = 1; 825 break; 826 case 48000: 827 sampling_frequency_index = 0; 828 break; 829 } 830 config[1] = (config[1] & 0xC0) | (1 << sampling_frequency_index); 831 } 832 833 static void avdtp_config_mpeg_audio_store(uint8_t * config, avdtp_mpeg_layer_t layer, uint8_t crc, avdtp_channel_mode_t channel_mode, uint8_t media_payload_format, 834 uint16_t sampling_frequency, uint8_t vbr, uint8_t bit_rate_index){ 835 836 config[0] = (((uint8_t) layer) << 5) | ((crc & 0x01) << 4) | (1 << (channel_mode - AVDTP_CHANNEL_MODE_MONO)); 837 config[1] = ((media_payload_format & 0x01) << 6) ; 838 uint16_t bit_rate_mask = 1 << bit_rate_index; 839 config[2] = ((vbr & 0x01) << 7) | ((bit_rate_mask >> 8) & 0x3f); 840 config[3] = bit_rate_mask & 0xff; 841 avdtp_config_mpeg_audio_set_sampling_frequency(config, sampling_frequency); 842 } 843 844 845 static void avdtp_config_mpeg_aac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 846 uint16_t sampling_frequency_bitmap = 0; 847 uint8_t i; 848 const uint32_t aac_sampling_frequency_table[] = { 849 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 850 }; 851 for (i=0;i<12;i++){ 852 if (sampling_frequency_hz == aac_sampling_frequency_table[i]){ 853 sampling_frequency_bitmap = 1 << i; 854 break; 855 } 856 } 857 config[1] = sampling_frequency_bitmap >> 4; 858 config[2] = ((sampling_frequency_bitmap & 0x0f) << 4) | (config[2] & 0x0f); 859 } 860 861 static void avdtp_config_mpeg_aac_store(uint8_t * config, avdtp_aac_object_type_t object_type, uint32_t sampling_frequency, uint8_t channels, uint32_t bit_rate, uint8_t vbr) { 862 config[0] = 1 << (7 -(object_type - AVDTP_AAC_MPEG2_LC)); 863 uint8_t channels_bitmap = 0; 864 switch (channels){ 865 case 1: 866 channels_bitmap = 0x02; 867 break; 868 case 2: 869 channels_bitmap = 0x01; 870 break; 871 default: 872 break; 873 } 874 config[2] = channels_bitmap << 2; 875 config[3] = ((vbr & 0x01) << 7) | ((bit_rate >> 16) & 0x7f); 876 config[4] = (bit_rate >> 8) & 0xff; 877 config[5] = bit_rate & 0xff; 878 avdtp_config_mpeg_aac_set_sampling_frequency(config, sampling_frequency); 879 } 880 881 static void avdtp_config_atrac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { 882 uint8_t fs_bitmap = 0; 883 switch (sampling_frequency_hz){ 884 case 44100: 885 fs_bitmap = 2; 886 break; 887 case 48000: 888 fs_bitmap = 1; 889 break; 890 default: 891 break; 892 } 893 config[1] = (fs_bitmap << 4) | (config[1] & 0x0F); 894 } 895 896 static void avdtp_config_atrac_store(uint8_t * config, avdtp_atrac_version_t version, avdtp_channel_mode_t channel_mode, uint16_t sampling_frequency, uint8_t vbr, 897 uint8_t bit_rate_index, uint16_t maximum_sul) { 898 uint8_t channel_mode_bitamp = 0; 899 switch (channel_mode){ 900 case AVDTP_CHANNEL_MODE_MONO: 901 channel_mode_bitamp = 4; 902 break; 903 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 904 channel_mode_bitamp = 2; 905 break; 906 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 907 channel_mode_bitamp = 1; 908 break; 909 default: 910 break; 911 } 912 config[0] = ((version - AVDTP_ATRAC_VERSION_1 + 1) << 5) | (channel_mode_bitamp << 2); 913 uint32_t bit_rate_bitmap = 1 << (0x18 - bit_rate_index); 914 config[1] = ((vbr & 0x01) << 3) | ((bit_rate_bitmap >> 16) & 0x07); 915 config[2] = (bit_rate_bitmap >> 8) & 0xff; 916 config[3] = bit_rate_bitmap & 0xff; 917 config[4] = maximum_sul >> 8; 918 config[5] = maximum_sul & 0xff; 919 config[6] = 0; 920 avdtp_config_atrac_set_sampling_frequency(config, sampling_frequency); 921 } 922 923 static uint8_t a2dp_source_config_init(uint8_t local_seid, uint8_t remote_seid, avdtp_media_codec_type_t codec_type) { 924 925 // lookup local stream endpoint 926 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 927 if (local_stream_endpoint == NULL){ 928 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 929 } 930 931 // lookup remote stream endpoint 932 avdtp_sep_t * remote_sep = NULL; 933 uint8_t i; 934 for (i=0;i<num_remote_seps;i++){ 935 if (remote_seps[i].seid == remote_seid){ 936 remote_sep = &remote_seps[i]; 937 } 938 } 939 if (remote_sep == NULL){ 940 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 941 } 942 943 // set media configuration 944 local_stream_endpoint->remote_configuration_bitmap = store_bit16(local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 945 local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 946 local_stream_endpoint->remote_configuration.media_codec.media_codec_type = codec_type; 947 // remote seid to use 948 local_stream_endpoint->set_config_remote_seid = remote_seid; 949 // enable delay reporting if supported 950 if (remote_sep->registered_service_categories & (1<<AVDTP_DELAY_REPORTING)){ 951 local_stream_endpoint->remote_configuration_bitmap = store_bit16(local_stream_endpoint->remote_configuration_bitmap, AVDTP_DELAY_REPORTING, 1); 952 } 953 954 // suitable Sink stream endpoint found, configure it 955 sc.local_stream_endpoint = local_stream_endpoint; 956 a2dp_source_have_config = true; 957 958 return ERROR_CODE_SUCCESS; 959 } 960 961 uint8_t a2dp_source_set_config_sbc(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t sampling_frequency, avdtp_channel_mode_t channel_mode, 962 uint8_t block_length, uint8_t subbands, avdtp_sbc_allocation_method_t allocation_method, uint8_t min_bitpool_value, uint8_t max_bitpool_value){ 963 964 if (a2dp_source_cid != a2dp_cid){ 965 return ERROR_CODE_COMMAND_DISALLOWED; 966 } 967 968 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 969 if (connection == NULL){ 970 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 971 } 972 973 uint8_t status = a2dp_source_config_init(local_seid, remote_seid, AVDTP_CODEC_SBC); 974 if (status != 0) { 975 return status; 976 } 977 // set config in reserved buffer 978 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) sc.local_stream_endpoint->media_codec_info; 979 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 4; 980 avdtp_config_sbc_store( sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information, 981 sampling_frequency, channel_mode, block_length, subbands, allocation_method, min_bitpool_value, max_bitpool_value); 982 983 return ERROR_CODE_SUCCESS; 984 } 985 986 uint8_t a2dp_source_set_config_mpeg_audio(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_mpeg_layer_t layer, uint8_t crc, 987 avdtp_channel_mode_t channel_mode, uint8_t media_payload_format, 988 uint16_t sampling_frequency, uint8_t vbr, uint8_t bit_rate_index){ 989 if (a2dp_source_cid != a2dp_cid){ 990 return ERROR_CODE_COMMAND_DISALLOWED; 991 } 992 993 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 994 if (connection == NULL){ 995 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 996 } 997 998 uint8_t status = a2dp_source_config_init(local_seid, remote_seid, AVDTP_CODEC_MPEG_1_2_AUDIO); 999 if (status != 0) { 1000 return status; 1001 } 1002 1003 // set config in reserved buffer 1004 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) sc.local_stream_endpoint->media_codec_info; 1005 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 4; 1006 avdtp_config_mpeg_audio_store( sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information, 1007 layer, crc, channel_mode, media_payload_format, sampling_frequency, vbr, bit_rate_index); 1008 1009 return ERROR_CODE_SUCCESS; 1010 } 1011 1012 uint8_t a2dp_source_set_config_mpeg_aac(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_aac_object_type_t object_type, 1013 uint32_t sampling_frequency, uint8_t channels, uint32_t bit_rate, uint8_t vbr){ 1014 if (a2dp_source_cid != a2dp_cid){ 1015 return ERROR_CODE_COMMAND_DISALLOWED; 1016 } 1017 1018 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 1019 if (connection == NULL){ 1020 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1021 } 1022 1023 uint8_t status = a2dp_source_config_init(local_seid, remote_seid, AVDTP_CODEC_MPEG_2_4_AAC); 1024 if (status != 0) { 1025 return status; 1026 } 1027 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) sc.local_stream_endpoint->media_codec_info; 1028 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 6; 1029 avdtp_config_mpeg_aac_store( sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information, 1030 object_type, sampling_frequency, channels, bit_rate, vbr); 1031 1032 return ERROR_CODE_SUCCESS; 1033 } 1034 1035 uint8_t a2dp_source_set_config_atrac(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_atrac_version_t version, 1036 avdtp_channel_mode_t channel_mode, uint16_t sampling_frequency, uint8_t vbr, 1037 uint8_t bit_rate_index, uint16_t maximum_sul){ 1038 if (a2dp_source_cid != a2dp_cid){ 1039 return ERROR_CODE_COMMAND_DISALLOWED; 1040 } 1041 1042 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 1043 if (connection == NULL){ 1044 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1045 } 1046 1047 uint8_t status = a2dp_source_config_init(local_seid, remote_seid, AVDTP_CODEC_ATRAC_FAMILY); 1048 if (status != 0) { 1049 return status; 1050 } 1051 1052 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) sc.local_stream_endpoint->media_codec_info; 1053 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = 7; 1054 avdtp_config_atrac_store( sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information, 1055 version, channel_mode, sampling_frequency, vbr, bit_rate_index, maximum_sul); 1056 1057 return ERROR_CODE_SUCCESS; 1058 } 1059 1060 uint8_t a2dp_source_set_config_other(uint16_t a2dp_cid, uint8_t local_seid, uint8_t remote_seid, 1061 const uint8_t * media_codec_information, uint8_t media_codec_information_len){ 1062 if (a2dp_source_cid != a2dp_cid){ 1063 return ERROR_CODE_COMMAND_DISALLOWED; 1064 } 1065 1066 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(a2dp_cid); 1067 if (connection == NULL){ 1068 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1069 } 1070 1071 uint8_t status = a2dp_source_config_init(local_seid, remote_seid, AVDTP_CODEC_NON_A2DP); 1072 if (status != 0) { 1073 return status; 1074 } 1075 1076 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information = (uint8_t *) media_codec_information; 1077 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_information_len; 1078 1079 return status; 1080 } 1081 1082 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 1083 if (a2dp_source_cid != avdtp_cid){ 1084 return ERROR_CODE_COMMAND_DISALLOWED; 1085 } 1086 1087 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1088 if (connection == NULL){ 1089 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1090 } 1091 1092 if (a2dp_source_state != A2DP_STREAMING_OPENED) { 1093 return ERROR_CODE_COMMAND_DISALLOWED; 1094 } 1095 1096 btstack_assert(sc.local_stream_endpoint != NULL); 1097 1098 log_info("Reconfigure avdtp_cid 0x%02x", avdtp_cid); 1099 1100 avdtp_media_codec_type_t codec_type = sc.local_stream_endpoint->sep.capabilities.media_codec.media_codec_type; 1101 uint8_t codec_info_len; 1102 switch (codec_type){ 1103 case AVDTP_CODEC_SBC: 1104 codec_info_len = 4; 1105 (void)memcpy(sc.local_stream_endpoint->media_codec_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1106 avdtp_config_sbc_set_sampling_frequency(sc.local_stream_endpoint->media_codec_info, sampling_frequency); 1107 break; 1108 case AVDTP_CODEC_MPEG_1_2_AUDIO: 1109 codec_info_len = 4; 1110 (void)memcpy(sc.local_stream_endpoint->media_codec_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1111 avdtp_config_mpeg_audio_set_sampling_frequency(sc.local_stream_endpoint->media_codec_info, sampling_frequency); 1112 break; 1113 case AVDTP_CODEC_MPEG_2_4_AAC: 1114 codec_info_len = 6; 1115 (void)memcpy(sc.local_stream_endpoint->media_codec_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1116 avdtp_config_mpeg_aac_set_sampling_frequency(sc.local_stream_endpoint->media_codec_info, sampling_frequency); 1117 break; 1118 case AVDTP_CODEC_ATRAC_FAMILY: 1119 codec_info_len = 7; 1120 (void)memcpy(sc.local_stream_endpoint->media_codec_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, codec_info_len); 1121 avdtp_config_atrac_set_sampling_frequency(sc.local_stream_endpoint->media_codec_info, sampling_frequency); 1122 break; 1123 case AVDTP_CODEC_NON_A2DP: 1124 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1125 } 1126 1127 avdtp_capabilities_t new_configuration; 1128 new_configuration.media_codec.media_type = AVDTP_AUDIO; 1129 new_configuration.media_codec.media_codec_type = codec_type; 1130 new_configuration.media_codec.media_codec_information_len = codec_info_len; 1131 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->media_codec_info; 1132 1133 // start reconfigure 1134 a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 1135 1136 return avdtp_source_reconfigure( 1137 avdtp_cid, 1138 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 1139 sc.local_stream_endpoint->remote_sep.seid, 1140 1 << AVDTP_MEDIA_CODEC, 1141 new_configuration 1142 ); 1143 } 1144