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