1 2 /* 3 * Copyright (C) 2016 BlueKitchen GmbH 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the copyright holders nor the names of 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 4. Any redistribution, use, or modification is done solely for 18 * personal benefit and not for any commercial purpose or for 19 * monetary gain. 20 * 21 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 25 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 31 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Please inquire about commercial licensing options at 35 * [email protected] 36 * 37 */ 38 39 #define BTSTACK_FILE__ "a2dp_source.c" 40 41 #include <stdint.h> 42 #include <string.h> 43 44 #include "bluetooth_psm.h" 45 #include "bluetooth_sdp.h" 46 #include "btstack_debug.h" 47 #include "btstack_event.h" 48 #include "classic/a2dp_source.h" 49 #include "classic/avdtp_source.h" 50 #include "classic/avdtp_util.h" 51 #include "classic/sdp_util.h" 52 #include "l2cap.h" 53 54 #define AVDTP_MAX_SEP_NUM 10 55 #define A2DP_SET_CONFIG_DELAY_MS 150 56 57 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 58 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 59 60 static btstack_timer_source_t a2dp_source_set_config_timer; 61 62 static bool discover_seps_in_process = false; 63 static bool stream_endpoint_configured = false; 64 65 static avdtp_stream_endpoint_context_t sc; 66 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 67 static int num_remote_seps = 0; 68 static btstack_packet_handler_t a2dp_source_packet_handler_user; 69 70 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 71 static void a2dp_discovere_seps_with_next_waiting_connection(void); 72 73 void a2dp_source_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 74 uint8_t* attribute; 75 de_create_sequence(service); 76 77 // 0x0000 "Service Record Handle" 78 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 79 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 80 81 // 0x0001 "Service Class ID List" 82 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 83 attribute = de_push_sequence(service); 84 { 85 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 86 } 87 de_pop_sequence(service, attribute); 88 89 // 0x0004 "Protocol Descriptor List" 90 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 91 attribute = de_push_sequence(service); 92 { 93 uint8_t* l2cpProtocol = de_push_sequence(attribute); 94 { 95 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 96 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 97 } 98 de_pop_sequence(attribute, l2cpProtocol); 99 100 uint8_t* avProtocol = de_push_sequence(attribute); 101 { 102 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 103 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 104 } 105 de_pop_sequence(attribute, avProtocol); 106 } 107 de_pop_sequence(service, attribute); 108 109 // 0x0005 "Public Browse Group" 110 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 111 attribute = de_push_sequence(service); 112 { 113 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 114 } 115 de_pop_sequence(service, attribute); 116 117 // 0x0009 "Bluetooth Profile Descriptor List" 118 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 119 attribute = de_push_sequence(service); 120 { 121 uint8_t *a2dProfile = de_push_sequence(attribute); 122 { 123 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 124 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 125 } 126 de_pop_sequence(attribute, a2dProfile); 127 } 128 de_pop_sequence(service, attribute); 129 130 131 // 0x0100 "Service Name" 132 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 133 if (service_name){ 134 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 135 } else { 136 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 137 } 138 139 // 0x0100 "Provider Name" 140 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 141 if (service_provider_name){ 142 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 143 } else { 144 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 145 } 146 147 // 0x0311 "Supported Features" 148 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 149 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 150 } 151 152 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 153 uint8_t event[7]; 154 int pos = 0; 155 event[pos++] = HCI_EVENT_A2DP_META; 156 event[pos++] = sizeof(event) - 2; 157 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 158 little_endian_store_16(event, pos, cid); 159 pos += 2; 160 event[pos++] = local_seid; 161 event[pos++] = status; 162 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 163 } 164 165 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 166 if (stream_endpoint_configured) return; 167 168 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 169 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 170 171 if (connection == NULL || connection->a2dp_source_state != A2DP_CONNECTED) { 172 a2dp_discovere_seps_with_next_waiting_connection(); 173 return; 174 } 175 176 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 177 avdtp_source_discover_stream_endpoints(avdtp_cid); 178 } 179 180 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 181 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 182 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 183 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 184 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 185 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 186 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 187 } 188 189 static void a2dp_source_set_config_timer_stop(void){ 190 log_info("a2dp_source_set_config_timer_stop"); 191 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 192 } 193 194 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 195 discover_seps_in_process = true; 196 sc.active_remote_sep_index = 0; 197 num_remote_seps = 0; 198 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 199 200 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 201 if (connection->a2dp_source_state == A2DP_W4_CONNECTED){ 202 log_info("A2DP singnaling connection: discover seps"); 203 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 204 avdtp_source_discover_stream_endpoints(connection->avdtp_cid); 205 } else { 206 log_info("A2DP singnaling connection: wait a bit, then discover seps"); 207 connection->a2dp_source_state = A2DP_CONNECTED; 208 a2dp_source_set_config_timer_start(connection->avdtp_cid); 209 } 210 } 211 212 static void a2dp_discovere_seps_with_next_waiting_connection(void){ 213 discover_seps_in_process = false; 214 215 btstack_linked_list_iterator_t it; 216 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 217 while (btstack_linked_list_iterator_has_next(&it)){ 218 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 219 if (!next_connection->a2dp_source_discover_seps) continue; 220 a2dp_start_discovering_seps(next_connection); 221 } 222 } 223 224 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 225 UNUSED(channel); 226 UNUSED(size); 227 228 uint16_t cid; 229 avdtp_connection_t * connection; 230 231 uint8_t signal_identifier; 232 uint8_t status; 233 uint8_t local_seid; 234 uint8_t remote_seid; 235 bd_addr_t address; 236 237 if (packet_type != HCI_EVENT_PACKET) return; 238 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 239 240 switch (packet[2]){ 241 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 242 if (stream_endpoint_configured) return; 243 if (sc.local_stream_endpoint == NULL) return; 244 245 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 246 connection = avdtp_get_connection_for_avdtp_cid(cid); 247 btstack_assert(connection != NULL); 248 249 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 250 251 status = avdtp_subevent_signaling_connection_established_get_status(packet); 252 if (status != ERROR_CODE_SUCCESS){ 253 // notify about connection error only if we're initator 254 if (connection->a2dp_source_state == A2DP_W4_CONNECTED){ 255 connection->a2dp_source_state = A2DP_IDLE; 256 log_info("A2DP source signaling connection failed status %d", status); 257 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 258 } 259 break; 260 } 261 log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid); 262 263 if (discover_seps_in_process){ 264 connection->a2dp_source_discover_seps = true; 265 break; 266 } 267 268 a2dp_start_discovering_seps(connection); 269 // notify app 270 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 271 break; 272 273 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 274 avdtp_sep_t sep; 275 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 276 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 277 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 278 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 279 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s, index %d", 280 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", num_remote_seps); 281 if (sep.type == AVDTP_SINK){ 282 remote_seps[num_remote_seps++] = sep; 283 } 284 break; 285 } 286 287 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 288 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 289 connection = avdtp_get_connection_for_avdtp_cid(cid); 290 btstack_assert(connection != NULL); 291 292 if (num_remote_seps > 0){ 293 connection->a2dp_source_state = A2DP_W2_GET_CAPABILITIES; 294 connection->supported_codecs_bitmap = 0; 295 sc.active_remote_sep_index = 0; 296 } else { 297 connection->a2dp_source_state = A2DP_CONNECTED; 298 connection->a2dp_source_discover_seps = false; 299 300 a2dp_discovere_seps_with_next_waiting_connection(); 301 } 302 break; 303 304 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 305 btstack_assert(sc.local_stream_endpoint != NULL); 306 307 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 308 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 309 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 310 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seps[sc.active_remote_sep_index].seid ); 311 312 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 313 connection = avdtp_get_connection_for_avdtp_cid(cid); 314 btstack_assert(connection != NULL); 315 316 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)); 317 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)); 318 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)); 319 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 320 321 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)); 322 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)); 323 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)); 324 325 326 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 327 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 328 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 329 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 330 331 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 332 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 333 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 334 335 connection->a2dp_source_state = A2DP_W2_SET_CONFIGURATION; 336 connection->supported_codecs_bitmap |= (1 << AVDTP_CODEC_SBC); 337 break; 338 339 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 340 log_info("received non SBC codec. not implemented"); 341 break; 342 343 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 344 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)); 345 break; 346 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 347 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 348 break; 349 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 350 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 351 break; 352 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 353 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)); 354 break; 355 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 356 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)); 357 break; 358 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 359 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 360 break; 361 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 362 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 363 break; 364 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 365 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 366 connection = avdtp_get_connection_for_avdtp_cid(cid); 367 btstack_assert(connection != NULL); 368 369 if (connection->a2dp_source_state == A2DP_W2_GET_CAPABILITIES){ 370 // endpoint was not suitable, check next one 371 sc.active_remote_sep_index++; 372 if (sc.active_remote_sep_index >= num_remote_seps){ 373 // we didn't find a suitable SBC stream endpoint, sorry. 374 connection->a2dp_source_state = A2DP_CONNECTED; 375 connection->a2dp_source_discover_seps = false; 376 377 a2dp_discovere_seps_with_next_waiting_connection(); 378 } 379 } 380 break; 381 382 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 383 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 384 break; 385 386 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 387 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 388 connection = avdtp_get_connection_for_avdtp_cid(cid); 389 btstack_assert(connection != NULL); 390 391 switch (connection->a2dp_source_state){ 392 case A2DP_W4_SET_CONFIGURATION: 393 a2dp_source_set_config_timer_stop(); 394 discover_seps_in_process = false; 395 connection->a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 396 break; 397 case A2DP_W4_RECONFIGURE_WITH_SEID: 398 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 399 break; 400 default: 401 return; 402 } 403 404 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 405 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 406 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 407 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 408 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 409 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 410 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 411 412 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)); 413 stream_endpoint_configured = true; 414 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 415 break; 416 417 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 418 break; 419 420 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 421 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 422 break; 423 424 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 425 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 426 connection = avdtp_get_connection_for_avdtp_cid(cid); 427 btstack_assert(connection != NULL); 428 429 btstack_assert(connection->a2dp_source_state == A2DP_W4_OPEN_STREAM_WITH_SEID); 430 431 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 432 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 433 status = avdtp_subevent_streaming_connection_established_get_status(packet); 434 if (status != ERROR_CODE_SUCCESS){ 435 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 436 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 437 break; 438 } 439 440 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 441 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 442 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 443 break; 444 445 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 446 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) break; 447 448 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 449 connection = avdtp_get_connection_for_avdtp_cid(cid); 450 btstack_assert(connection != NULL); 451 btstack_assert(sc.local_stream_endpoint != NULL); 452 453 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 454 455 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, 456 avdtp_subevent_signaling_accept_get_is_initiator(packet), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 457 458 switch (connection->a2dp_source_state){ 459 case A2DP_W2_GET_CAPABILITIES: 460 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 461 log_info("A2DP get capabilities for remote seid %d", remote_seid); 462 avdtp_source_get_capabilities(cid, remote_seid); 463 break; 464 465 case A2DP_W2_SET_CONFIGURATION: 466 if ( (connection->supported_codecs_bitmap & (1 << AVDTP_CODEC_SBC)) == 0 ) return; 467 468 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 469 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); 470 connection->a2dp_source_state = A2DP_W4_SET_CONFIGURATION; 471 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); 472 break; 473 474 case A2DP_W2_RECONFIGURE_WITH_SEID: 475 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); 476 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 477 connection->a2dp_source_state = A2DP_W4_RECONFIGURE_WITH_SEID; 478 break; 479 480 case A2DP_W2_OPEN_STREAM_WITH_SEID: 481 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); 482 connection->a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 483 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 484 break; 485 486 case A2DP_STREAMING_OPENED: 487 switch (signal_identifier){ 488 case AVDTP_SI_START: 489 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 490 break; 491 case AVDTP_SI_SUSPEND: 492 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 493 break; 494 case AVDTP_SI_ABORT: 495 case AVDTP_SI_CLOSE: 496 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 497 break; 498 default: 499 break; 500 } 501 break; 502 default: 503 btstack_assert(false); 504 break; 505 } 506 break; 507 508 case AVDTP_SUBEVENT_SIGNALING_REJECT: 509 if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break; 510 511 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 512 connection = avdtp_get_connection_for_avdtp_cid(cid); 513 btstack_assert(connection != NULL); 514 515 connection->a2dp_source_state = A2DP_CONNECTED; 516 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 517 break; 518 519 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 520 if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break; 521 522 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 523 connection = avdtp_get_connection_for_avdtp_cid(cid); 524 btstack_assert(connection != NULL); 525 526 connection->a2dp_source_state = A2DP_CONNECTED; 527 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 528 break; 529 530 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 531 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 532 connection = avdtp_get_connection_for_avdtp_cid(cid); 533 btstack_assert(connection != NULL); 534 535 connection->a2dp_source_state = A2DP_CONFIGURED; 536 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 537 break; 538 539 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 540 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 541 connection = avdtp_get_connection_for_avdtp_cid(cid); 542 btstack_assert(connection != NULL); 543 544 if (connection->a2dp_source_state == A2DP_CONFIGURED){ 545 stream_endpoint_configured = false; 546 connection->a2dp_source_state = A2DP_IDLE; 547 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 548 } 549 break; 550 551 default: 552 break; 553 } 554 } 555 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 556 btstack_assert(callback != NULL); 557 558 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 559 a2dp_source_packet_handler_user = callback; 560 } 561 562 void a2dp_source_init(void){ 563 avdtp_source_init(); 564 } 565 566 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 567 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 568 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 569 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 570 if (!local_stream_endpoint){ 571 return NULL; 572 } 573 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 574 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 575 codec_capabilities, codec_capabilities_len); 576 577 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 578 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 579 sc.local_stream_endpoint = local_stream_endpoint; 580 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 581 return local_stream_endpoint; 582 } 583 584 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 585 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 586 if (!sc.local_stream_endpoint){ 587 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 588 } 589 590 uint8_t status = avdtp_source_connect(remote_addr, avdtp_cid); 591 if (status != ERROR_CODE_SUCCESS) return status; 592 593 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(*avdtp_cid); 594 btstack_assert(connection != NULL); 595 596 connection->a2dp_source_state = A2DP_W4_CONNECTED; 597 return ERROR_CODE_SUCCESS; 598 } 599 600 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 601 return avdtp_disconnect(avdtp_cid); 602 } 603 604 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 605 btstack_assert(sc.local_stream_endpoint != NULL); 606 607 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 608 if (connection == NULL){ 609 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 610 } 611 612 if (connection->a2dp_source_state != A2DP_STREAMING_OPENED) { 613 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 614 } 615 616 log_info("a2dp_source_reconfigure_stream"); 617 618 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 619 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 620 4); 621 622 // update sampling frequency 623 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 624 switch (sampling_frequency){ 625 case 48000: 626 config |= (AVDTP_SBC_48000 << 4); 627 break; 628 case 44100: 629 config |= (AVDTP_SBC_44100 << 4); 630 break; 631 case 32000: 632 config |= (AVDTP_SBC_32000 << 4); 633 break; 634 case 16000: 635 config |= (AVDTP_SBC_16000 << 4); 636 break; 637 default: 638 log_error("Unsupported sampling frequency %u", sampling_frequency); 639 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 640 } 641 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 642 643 avdtp_capabilities_t new_configuration; 644 new_configuration.media_codec.media_type = AVDTP_AUDIO; 645 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 646 new_configuration.media_codec.media_codec_information_len = 4; 647 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 648 649 // start reconfigure 650 connection->a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 651 652 return avdtp_source_reconfigure( 653 avdtp_cid, 654 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 655 sc.local_stream_endpoint->remote_sep.seid, 656 1 << AVDTP_MEDIA_CODEC, 657 new_configuration 658 ); 659 } 660 661 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 662 return avdtp_start_stream(avdtp_cid, local_seid); 663 } 664 665 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 666 return avdtp_suspend_stream(avdtp_cid, local_seid); 667 } 668 669 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 670 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 671 } 672 673 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 674 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 675 } 676 677 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){ 678 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 679 } 680