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