1 2 /* 3 * Copyright (C) 2016 BlueKitchen GmbH 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the copyright holders nor the names of 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 4. Any redistribution, use, or modification is done solely for 18 * personal benefit and not for any commercial purpose or for 19 * monetary gain. 20 * 21 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 25 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 31 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Please inquire about commercial licensing options at 35 * [email protected] 36 * 37 */ 38 39 #define BTSTACK_FILE__ "a2dp_source.c" 40 41 #include <stdint.h> 42 #include <string.h> 43 44 #include "bluetooth_psm.h" 45 #include "bluetooth_sdp.h" 46 #include "btstack_debug.h" 47 #include "btstack_event.h" 48 #include "classic/a2dp_source.h" 49 #include "classic/avdtp_source.h" 50 #include "classic/avdtp_util.h" 51 #include "classic/sdp_util.h" 52 #include "l2cap.h" 53 54 #define AVDTP_MAX_SEP_NUM 10 55 #define A2DP_SET_CONFIG_DELAY_MS 150 56 57 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 58 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 59 60 static btstack_timer_source_t a2dp_source_set_config_timer; 61 62 static bool discover_seps_in_process = false; 63 static bool stream_endpoint_configured = false; 64 65 static avdtp_stream_endpoint_context_t sc; 66 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 67 static int num_remote_seps = 0; 68 static btstack_packet_handler_t a2dp_source_packet_handler_user; 69 70 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 71 static void a2dp_try_discovering_seps_with_next_waiting_connection(void); 72 73 void a2dp_source_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 74 uint8_t* attribute; 75 de_create_sequence(service); 76 77 // 0x0000 "Service Record Handle" 78 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 79 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 80 81 // 0x0001 "Service Class ID List" 82 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 83 attribute = de_push_sequence(service); 84 { 85 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 86 } 87 de_pop_sequence(service, attribute); 88 89 // 0x0004 "Protocol Descriptor List" 90 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 91 attribute = de_push_sequence(service); 92 { 93 uint8_t* l2cpProtocol = de_push_sequence(attribute); 94 { 95 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 96 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 97 } 98 de_pop_sequence(attribute, l2cpProtocol); 99 100 uint8_t* avProtocol = de_push_sequence(attribute); 101 { 102 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 103 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 104 } 105 de_pop_sequence(attribute, avProtocol); 106 } 107 de_pop_sequence(service, attribute); 108 109 // 0x0005 "Public Browse Group" 110 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 111 attribute = de_push_sequence(service); 112 { 113 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 114 } 115 de_pop_sequence(service, attribute); 116 117 // 0x0009 "Bluetooth Profile Descriptor List" 118 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 119 attribute = de_push_sequence(service); 120 { 121 uint8_t *a2dProfile = de_push_sequence(attribute); 122 { 123 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 124 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 125 } 126 de_pop_sequence(attribute, a2dProfile); 127 } 128 de_pop_sequence(service, attribute); 129 130 131 // 0x0100 "Service Name" 132 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 133 if (service_name){ 134 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 135 } else { 136 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 137 } 138 139 // 0x0100 "Provider Name" 140 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 141 if (service_provider_name){ 142 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 143 } else { 144 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 145 } 146 147 // 0x0311 "Supported Features" 148 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 149 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 150 } 151 152 153 static void a2dp_streaming_emit_can_send_media_packet_now(uint16_t cid, uint8_t seid){ 154 uint8_t event[8]; 155 int pos = 0; 156 event[pos++] = HCI_EVENT_A2DP_META; 157 event[pos++] = sizeof(event) - 2; 158 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 159 little_endian_store_16(event, pos, cid); 160 pos += 2; 161 event[pos++] = seid; 162 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 163 } 164 165 static inline void a2dp_signaling_emit_delay_report_capability(uint8_t * event, uint16_t event_size){ 166 event[0] = HCI_EVENT_A2DP_META; 167 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 168 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 169 } 170 171 static inline void a2dp_signaling_emit_delay_report(uint8_t * event, uint16_t event_size){ 172 event[0] = HCI_EVENT_A2DP_META; 173 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 174 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 175 } 176 177 static inline void a2dp_signaling_emit_media_codec_sbc(uint8_t * event, uint16_t event_size){ 178 if (event_size < 18) return; 179 event[0] = HCI_EVENT_A2DP_META; 180 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 181 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 182 } 183 184 static inline void a2dp_signaling_emit_reject_cmd(uint8_t * event, uint16_t event_size){ 185 if (event_size < 18) return; 186 event[0] = HCI_EVENT_A2DP_META; 187 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 188 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 189 } 190 191 static void a2dp_signaling_emit_connection_established(uint16_t cid, bd_addr_t addr, uint8_t status){ 192 uint8_t event[12]; 193 int pos = 0; 194 event[pos++] = HCI_EVENT_A2DP_META; 195 event[pos++] = sizeof(event) - 2; 196 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 197 little_endian_store_16(event, pos, cid); 198 pos += 2; 199 reverse_bd_addr(addr,&event[pos]); 200 pos += 6; 201 event[pos++] = status; 202 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 203 } 204 205 static void a2dp_signaling_emit_control_command(uint16_t cid, uint8_t local_seid, uint8_t cmd){ 206 uint8_t event[6]; 207 int pos = 0; 208 event[pos++] = HCI_EVENT_A2DP_META; 209 event[pos++] = sizeof(event) - 2; 210 event[pos++] = cmd; 211 little_endian_store_16(event, pos, cid); 212 pos += 2; 213 event[pos++] = local_seid; 214 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 215 } 216 217 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 218 uint8_t event[7]; 219 int pos = 0; 220 event[pos++] = HCI_EVENT_A2DP_META; 221 event[pos++] = sizeof(event) - 2; 222 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 223 little_endian_store_16(event, pos, cid); 224 pos += 2; 225 event[pos++] = local_seid; 226 event[pos++] = status; 227 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 228 } 229 230 231 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 232 if (stream_endpoint_configured) return; 233 234 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 235 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 236 237 if (connection == NULL || connection->a2dp_source_state != A2DP_CONNECTED) { 238 a2dp_try_discovering_seps_with_next_waiting_connection(); 239 return; 240 } 241 242 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 243 avdtp_source_discover_stream_endpoints(avdtp_cid); 244 } 245 246 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 247 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 248 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 249 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 250 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 251 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 252 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 253 } 254 255 static void a2dp_source_set_config_timer_stop(void){ 256 log_info("a2dp_source_set_config_timer_stop"); 257 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 258 } 259 260 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 261 discover_seps_in_process = true; 262 sc.active_remote_sep_index = 0; 263 num_remote_seps = 0; 264 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 265 266 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 267 if (connection->a2dp_source_state == A2DP_W4_CONNECTED){ 268 log_info("A2DP singnaling connection: discover seps"); 269 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 270 avdtp_source_discover_stream_endpoints(connection->avdtp_cid); 271 } else { 272 log_info("A2DP singnaling connection: wait a bit, then discover seps"); 273 connection->a2dp_source_state = A2DP_CONNECTED; 274 a2dp_source_set_config_timer_start(connection->avdtp_cid); 275 } 276 } 277 278 static void a2dp_try_discovering_seps_with_next_waiting_connection(void){ 279 discover_seps_in_process = false; 280 281 btstack_linked_list_iterator_t it; 282 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 283 while (btstack_linked_list_iterator_has_next(&it)){ 284 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 285 if (!next_connection->a2dp_source_discover_seps) continue; 286 a2dp_start_discovering_seps(next_connection); 287 } 288 } 289 290 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 291 UNUSED(channel); 292 UNUSED(size); 293 294 uint16_t cid; 295 avdtp_connection_t * connection; 296 297 uint8_t signal_identifier; 298 uint8_t status; 299 uint8_t local_seid; 300 uint8_t remote_seid; 301 bd_addr_t address; 302 303 if (packet_type != HCI_EVENT_PACKET) return; 304 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 305 306 switch (packet[2]){ 307 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 308 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 309 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 310 311 connection = avdtp_get_connection_for_avdtp_cid(cid); 312 btstack_assert(connection != NULL); 313 314 status = avdtp_subevent_signaling_connection_established_get_status(packet); 315 if (status != 0){ 316 log_info("A2DP singnaling connection failed status %d", status); 317 connection->a2dp_source_state = A2DP_IDLE; 318 a2dp_signaling_emit_connection_established(cid, address, status); 319 break; 320 } 321 log_info("A2DP singnaling connection established avdtp_cid 0x%02x", cid); 322 323 if (stream_endpoint_configured) return; 324 if (discover_seps_in_process){ 325 connection->a2dp_source_discover_seps = true; 326 break; 327 } 328 329 a2dp_start_discovering_seps(connection); 330 // notify app 331 a2dp_signaling_emit_connection_established(connection->avdtp_cid, address, ERROR_CODE_SUCCESS); 332 break; 333 334 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 335 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 336 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 337 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 338 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seps[sc.active_remote_sep_index].seid ); 339 340 if (!sc.local_stream_endpoint) { 341 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 342 return; 343 } 344 345 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 346 347 connection = avdtp_get_connection_for_avdtp_cid(cid); 348 btstack_assert(connection != NULL); 349 350 uint8_t sampling_frequency = avdtp_choose_sbc_sampling_frequency(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet)); 351 uint8_t channel_mode = avdtp_choose_sbc_channel_mode(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet)); 352 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)); 353 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 354 355 uint8_t allocation_method = avdtp_choose_sbc_allocation_method(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet)); 356 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)); 357 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)); 358 359 360 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 361 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 362 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 363 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 364 365 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 366 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 367 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 368 369 connection->a2dp_source_state = A2DP_W2_SET_CONFIGURATION; 370 break; 371 } 372 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 373 log_info("received non SBC codec. not implemented"); 374 break; 375 376 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 377 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, remote seid %d", avdtp_subevent_signaling_media_transport_capability_get_remote_seid(packet)); 378 break; 379 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 380 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 381 break; 382 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 383 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 384 break; 385 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 386 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY, remote seid %d", avdtp_subevent_signaling_content_protection_capability_get_remote_seid(packet)); 387 break; 388 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 389 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY, remote seid %d", avdtp_subevent_signaling_header_compression_capability_get_remote_seid(packet)); 390 break; 391 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 392 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 393 break; 394 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 395 a2dp_signaling_emit_delay_report_capability(packet, size); 396 break; 397 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 398 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 399 400 connection = avdtp_get_connection_for_avdtp_cid(cid); 401 btstack_assert(connection != NULL); 402 403 if (connection->a2dp_source_state == A2DP_W2_GET_CAPABILITIES){ 404 // endpoint was not suitable, check next one 405 sc.active_remote_sep_index++; 406 if (sc.active_remote_sep_index >= num_remote_seps){ 407 // we didn't find a suitable SBC stream endpoint, sorry. 408 connection->a2dp_source_state = A2DP_CONNECTED; 409 connection->a2dp_source_discover_seps = false; 410 411 a2dp_try_discovering_seps_with_next_waiting_connection(); 412 } 413 } 414 break; 415 416 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 417 // forward packet: 418 a2dp_signaling_emit_delay_report(packet, size); 419 break; 420 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 421 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 422 423 connection = avdtp_get_connection_for_avdtp_cid(cid); 424 btstack_assert(connection != NULL); 425 426 a2dp_source_set_config_timer_stop(); 427 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 428 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 429 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 430 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 431 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 432 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 433 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 434 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 435 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u., remote seid %d", sc.sampling_frequency, sc.max_bitpool_value, avdtp_subevent_signaling_media_codec_sbc_configuration_get_remote_seid(packet)); 436 connection->a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 437 a2dp_signaling_emit_media_codec_sbc(packet, size); 438 439 discover_seps_in_process = false; 440 stream_endpoint_configured = true; 441 break; 442 443 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 444 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 445 local_seid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 446 a2dp_streaming_emit_can_send_media_packet_now(cid, local_seid); 447 break; 448 449 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 450 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 451 452 connection = avdtp_get_connection_for_avdtp_cid(cid); 453 btstack_assert(connection != NULL); 454 455 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 456 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 457 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 458 status = avdtp_subevent_streaming_connection_established_get_status(packet); 459 460 if (status != 0){ 461 log_info("A2DP streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 462 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, status); 463 break; 464 } 465 466 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 467 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 468 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, 0); 469 break; 470 471 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 472 avdtp_sep_t sep; 473 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 474 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 475 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 476 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 477 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s, index %d", 478 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", num_remote_seps); 479 if (sep.type == AVDTP_SINK){ 480 remote_seps[num_remote_seps++] = sep; 481 } 482 break; 483 } 484 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 485 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 486 487 connection = avdtp_get_connection_for_avdtp_cid(cid); 488 btstack_assert(connection != NULL); 489 490 if (num_remote_seps > 0){ 491 connection->a2dp_source_state = A2DP_W2_GET_CAPABILITIES; 492 sc.active_remote_sep_index = 0; 493 } else { 494 connection->a2dp_source_state = A2DP_CONNECTED; 495 connection->a2dp_source_discover_seps = false; 496 497 a2dp_try_discovering_seps_with_next_waiting_connection(); 498 } 499 break; 500 501 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 502 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 503 504 connection = avdtp_get_connection_for_avdtp_cid(cid); 505 btstack_assert(connection != NULL); 506 507 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 508 509 log_info("A2DP cmd %s accepted, state %x, is_initiator %u, cid 0x%2x, local seid %d", avdtp_si2str(signal_identifier), connection->a2dp_source_state, 510 avdtp_subevent_signaling_accept_get_is_initiator(packet), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 511 512 switch (connection->a2dp_source_state){ 513 case A2DP_W2_GET_CAPABILITIES: 514 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 515 log_info("A2DP get capabilities for remote seid %d", remote_seid); 516 avdtp_source_get_capabilities(cid, remote_seid); 517 break; 518 case A2DP_W2_SET_CONFIGURATION:{ 519 if (sc.local_stream_endpoint != NULL){ 520 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 521 log_info("A2DP initiate set configuration locally and wait for response ... local seid %d, remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid); 522 connection->a2dp_source_state = A2DP_IDLE; 523 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); 524 } 525 break; 526 } 527 case A2DP_W2_RECONFIGURE_WITH_SEID: 528 log_info("A2DP reconfigured ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 529 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 530 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 531 break; 532 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 533 log_info("A2DP open stream ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 534 connection->a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 535 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 536 break; 537 } 538 case A2DP_STREAMING_OPENED: 539 switch (signal_identifier){ 540 case AVDTP_SI_START: 541 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 542 break; 543 case AVDTP_SI_SUSPEND: 544 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 545 break; 546 case AVDTP_SI_ABORT: 547 case AVDTP_SI_CLOSE: 548 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 549 break; 550 default: 551 break; 552 } 553 break; 554 default: 555 connection->a2dp_source_state = A2DP_CONNECTED; 556 break; 557 } 558 559 break; 560 case AVDTP_SUBEVENT_SIGNALING_REJECT: 561 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 562 connection = avdtp_get_connection_for_avdtp_cid(cid); 563 btstack_assert(connection != NULL); 564 565 connection->a2dp_source_state = A2DP_CONNECTED; 566 a2dp_signaling_emit_reject_cmd(packet, size); 567 break; 568 569 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 570 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 571 connection = avdtp_get_connection_for_avdtp_cid(cid); 572 btstack_assert(connection != NULL); 573 574 connection->a2dp_source_state = A2DP_CONNECTED; 575 a2dp_signaling_emit_reject_cmd(packet, size); 576 break; 577 578 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 579 stream_endpoint_configured = false; 580 581 uint8_t event[6]; 582 int pos = 0; 583 event[pos++] = HCI_EVENT_A2DP_META; 584 event[pos++] = sizeof(event) - 2; 585 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 586 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 587 pos += 2; 588 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 589 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 590 break; 591 } 592 593 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 594 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 595 connection = avdtp_get_connection_for_avdtp_cid(cid); 596 btstack_assert(connection != NULL); 597 598 connection->a2dp_source_state = A2DP_CONFIGURED; 599 uint8_t event[6]; 600 int pos = 0; 601 event[pos++] = HCI_EVENT_A2DP_META; 602 event[pos++] = sizeof(event) - 2; 603 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 604 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 605 pos += 2; 606 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 607 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 608 break; 609 } 610 default: 611 break; 612 } 613 } 614 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 615 btstack_assert(callback != NULL); 616 617 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 618 a2dp_source_packet_handler_user = callback; 619 } 620 621 void a2dp_source_init(void){ 622 avdtp_source_init(); 623 } 624 625 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 626 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 627 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 628 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 629 if (!local_stream_endpoint){ 630 return NULL; 631 } 632 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 633 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 634 codec_capabilities, codec_capabilities_len); 635 636 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 637 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 638 sc.local_stream_endpoint = local_stream_endpoint; 639 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 640 return local_stream_endpoint; 641 } 642 643 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 644 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 645 if (!sc.local_stream_endpoint){ 646 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 647 } 648 649 uint8_t status = avdtp_source_connect(remote_addr, avdtp_cid); 650 if (status != ERROR_CODE_SUCCESS) return status; 651 652 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(*avdtp_cid); 653 btstack_assert(connection != NULL); 654 655 connection->a2dp_source_state = A2DP_W4_CONNECTED; 656 657 return ERROR_CODE_SUCCESS; 658 } 659 660 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 661 return avdtp_disconnect(avdtp_cid); 662 } 663 664 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 665 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 666 if (connection == NULL) ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 667 668 log_info("a2dp_source_reconfigure_stream"); 669 670 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 671 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 672 4); 673 674 // update sampling frequency 675 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 676 switch (sampling_frequency){ 677 case 48000: 678 config |= (AVDTP_SBC_48000 << 4); 679 break; 680 case 44100: 681 config |= (AVDTP_SBC_44100 << 4); 682 break; 683 case 32000: 684 config |= (AVDTP_SBC_32000 << 4); 685 break; 686 case 16000: 687 config |= (AVDTP_SBC_16000 << 4); 688 break; 689 default: 690 log_error("Unsupported sampling frequency %u", sampling_frequency); 691 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 692 } 693 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 694 695 avdtp_capabilities_t new_configuration; 696 new_configuration.media_codec.media_type = AVDTP_AUDIO; 697 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 698 new_configuration.media_codec.media_codec_information_len = 4; 699 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 700 701 // start reconfigure 702 connection->a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 703 704 return avdtp_source_reconfigure( 705 avdtp_cid, 706 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 707 sc.local_stream_endpoint->remote_sep.seid, 708 1 << AVDTP_MEDIA_CODEC, 709 new_configuration 710 ); 711 } 712 713 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 714 return avdtp_start_stream(avdtp_cid, local_seid); 715 } 716 717 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 718 return avdtp_suspend_stream(avdtp_cid, local_seid); 719 } 720 721 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 722 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 723 } 724 725 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 726 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 727 } 728 729 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){ 730 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 731 } 732