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_discover_stream_endpoints(uint16_t avdtp_cid){ 166 avdtp_source_discover_stream_endpoints(avdtp_cid); 167 } 168 169 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 170 if (stream_endpoint_configured) return; 171 172 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 173 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 174 175 if (connection == NULL || connection->a2dp_source_state != A2DP_CONNECTED) { 176 a2dp_discovere_seps_with_next_waiting_connection(); 177 return; 178 } 179 180 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 181 a2dp_source_discover_stream_endpoints(avdtp_cid); 182 } 183 184 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 185 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 186 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 187 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 188 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 189 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 190 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 191 } 192 193 static void a2dp_source_set_config_timer_stop(void){ 194 log_info("a2dp_source_set_config_timer_stop"); 195 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 196 } 197 198 static void a2dp_start_discovering_seps(avdtp_connection_t * connection){ 199 discover_seps_in_process = true; 200 sc.active_remote_sep_index = 0; 201 num_remote_seps = 0; 202 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 203 204 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 205 if (connection->a2dp_source_state == A2DP_W4_CONNECTED){ 206 log_info("A2DP singnaling connection: discover seps"); 207 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 208 a2dp_source_discover_stream_endpoints(connection->avdtp_cid); 209 } else { 210 log_info("A2DP singnaling connection: wait a bit, then discover seps"); 211 connection->a2dp_source_state = A2DP_CONNECTED; 212 a2dp_source_set_config_timer_start(connection->avdtp_cid); 213 } 214 } 215 216 static void a2dp_discovere_seps_with_next_waiting_connection(void){ 217 discover_seps_in_process = false; 218 219 btstack_linked_list_iterator_t it; 220 btstack_linked_list_iterator_init(&it, avdtp_get_connections()); 221 while (btstack_linked_list_iterator_has_next(&it)){ 222 avdtp_connection_t * next_connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 223 if (!next_connection->a2dp_source_discover_seps) continue; 224 a2dp_start_discovering_seps(next_connection); 225 } 226 } 227 228 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 229 UNUSED(channel); 230 UNUSED(size); 231 232 uint16_t cid; 233 avdtp_connection_t * connection; 234 235 uint8_t signal_identifier; 236 uint8_t status; 237 uint8_t local_seid; 238 uint8_t remote_seid; 239 bd_addr_t address; 240 241 if (packet_type != HCI_EVENT_PACKET) return; 242 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 243 244 switch (packet[2]){ 245 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 246 if (stream_endpoint_configured) return; 247 if (sc.local_stream_endpoint == NULL) return; 248 249 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 250 connection = avdtp_get_connection_for_avdtp_cid(cid); 251 btstack_assert(connection != NULL); 252 253 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 254 255 status = avdtp_subevent_signaling_connection_established_get_status(packet); 256 if (status != ERROR_CODE_SUCCESS){ 257 // notify about connection error only if we're initator 258 if (connection->a2dp_source_state == A2DP_W4_CONNECTED){ 259 connection->a2dp_source_state = A2DP_IDLE; 260 log_info("A2DP source signaling connection failed status %d", status); 261 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 262 } 263 break; 264 } 265 log_info("A2DP source signaling connection established avdtp_cid 0x%02x", cid); 266 267 // notify app 268 a2dp_emit_signaling_connection_established(a2dp_source_packet_handler_user, packet, size, status); 269 270 // discover seps 271 if (discover_seps_in_process){ 272 connection->a2dp_source_discover_seps = true; 273 } else { 274 a2dp_start_discovering_seps(connection); 275 } 276 break; 277 278 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 279 avdtp_sep_t sep; 280 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 281 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 282 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 283 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 284 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s, index %d", 285 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", num_remote_seps); 286 if (sep.type == AVDTP_SINK){ 287 remote_seps[num_remote_seps++] = sep; 288 } 289 break; 290 } 291 292 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 293 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 294 connection = avdtp_get_connection_for_avdtp_cid(cid); 295 btstack_assert(connection != NULL); 296 297 if (num_remote_seps > 0){ 298 connection->a2dp_source_state = A2DP_W2_GET_CAPABILITIES; 299 connection->supported_codecs_bitmap = 0; 300 sc.active_remote_sep_index = 0; 301 } else { 302 connection->a2dp_source_state = A2DP_CONNECTED; 303 connection->a2dp_source_discover_seps = false; 304 305 a2dp_discovere_seps_with_next_waiting_connection(); 306 } 307 break; 308 309 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY: 310 btstack_assert(sc.local_stream_endpoint != NULL); 311 312 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 313 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 314 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 315 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seps[sc.active_remote_sep_index].seid ); 316 317 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 318 connection = avdtp_get_connection_for_avdtp_cid(cid); 319 btstack_assert(connection != NULL); 320 321 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)); 322 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)); 323 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)); 324 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 325 326 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)); 327 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)); 328 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)); 329 330 331 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 332 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 333 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 334 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 335 336 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 337 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 338 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 339 340 connection->a2dp_source_state = A2DP_W2_SET_CONFIGURATION; 341 connection->supported_codecs_bitmap |= (1 << AVDTP_CODEC_SBC); 342 break; 343 344 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 345 log_info("received non SBC codec. not implemented"); 346 break; 347 348 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 349 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)); 350 break; 351 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 352 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 353 break; 354 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 355 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 356 break; 357 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 358 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)); 359 break; 360 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 361 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)); 362 break; 363 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 364 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 365 break; 366 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 367 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY); 368 break; 369 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 370 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 371 connection = avdtp_get_connection_for_avdtp_cid(cid); 372 btstack_assert(connection != NULL); 373 374 if (connection->a2dp_source_state == A2DP_W2_GET_CAPABILITIES){ 375 // endpoint was not suitable, check next one 376 sc.active_remote_sep_index++; 377 if (sc.active_remote_sep_index >= num_remote_seps){ 378 // we didn't find a suitable SBC stream endpoint, sorry. 379 connection->a2dp_source_state = A2DP_CONNECTED; 380 connection->a2dp_source_discover_seps = false; 381 382 a2dp_discovere_seps_with_next_waiting_connection(); 383 } 384 } 385 break; 386 387 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 388 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_DELAY_REPORT); 389 break; 390 391 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 392 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 393 connection = avdtp_get_connection_for_avdtp_cid(cid); 394 btstack_assert(connection != NULL); 395 396 switch (connection->a2dp_source_state){ 397 case A2DP_W4_SET_CONFIGURATION: 398 a2dp_source_set_config_timer_stop(); 399 discover_seps_in_process = false; 400 connection->a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 401 break; 402 case A2DP_W4_RECONFIGURE_WITH_SEID: 403 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 404 break; 405 default: 406 return; 407 } 408 409 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 410 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 411 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 412 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 413 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 414 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 415 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 416 417 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)); 418 stream_endpoint_configured = true; 419 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 420 break; 421 422 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 423 break; 424 425 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 426 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW); 427 break; 428 429 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 430 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 431 connection = avdtp_get_connection_for_avdtp_cid(cid); 432 btstack_assert(connection != NULL); 433 434 btstack_assert(connection->a2dp_source_state == A2DP_W4_OPEN_STREAM_WITH_SEID); 435 436 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 437 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 438 status = avdtp_subevent_streaming_connection_established_get_status(packet); 439 if (status != ERROR_CODE_SUCCESS){ 440 log_info("A2DP source streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 441 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 442 break; 443 } 444 445 log_info("A2DP source streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 446 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 447 a2dp_emit_streaming_connection_established(a2dp_source_packet_handler_user, packet, size, status); 448 break; 449 450 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 451 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) == 0) break; 452 453 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 454 connection = avdtp_get_connection_for_avdtp_cid(cid); 455 btstack_assert(connection != NULL); 456 btstack_assert(sc.local_stream_endpoint != NULL); 457 458 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 459 460 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, 461 avdtp_subevent_signaling_accept_get_is_initiator(packet), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 462 463 switch (connection->a2dp_source_state){ 464 case A2DP_W2_GET_CAPABILITIES: 465 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 466 log_info("A2DP get capabilities for remote seid %d", remote_seid); 467 avdtp_source_get_capabilities(cid, remote_seid); 468 break; 469 470 case A2DP_W2_SET_CONFIGURATION: 471 if ( (connection->supported_codecs_bitmap & (1 << AVDTP_CODEC_SBC)) == 0 ) return; 472 473 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 474 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); 475 connection->a2dp_source_state = A2DP_W4_SET_CONFIGURATION; 476 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); 477 break; 478 479 case A2DP_W2_RECONFIGURE_WITH_SEID: 480 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); 481 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 482 connection->a2dp_source_state = A2DP_W4_RECONFIGURE_WITH_SEID; 483 break; 484 485 case A2DP_W2_OPEN_STREAM_WITH_SEID: 486 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); 487 connection->a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 488 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 489 break; 490 491 case A2DP_STREAMING_OPENED: 492 switch (signal_identifier){ 493 case AVDTP_SI_START: 494 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 495 break; 496 case AVDTP_SI_SUSPEND: 497 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 498 break; 499 case AVDTP_SI_ABORT: 500 case AVDTP_SI_CLOSE: 501 a2dp_emit_stream_event(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 502 break; 503 default: 504 break; 505 } 506 break; 507 default: 508 btstack_assert(false); 509 break; 510 } 511 break; 512 513 case AVDTP_SUBEVENT_SIGNALING_REJECT: 514 if (avdtp_subevent_signaling_reject_get_is_initiator(packet) == 0) break; 515 516 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 517 connection = avdtp_get_connection_for_avdtp_cid(cid); 518 btstack_assert(connection != NULL); 519 520 connection->a2dp_source_state = A2DP_CONNECTED; 521 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 522 break; 523 524 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 525 if (avdtp_subevent_signaling_general_reject_get_is_initiator(packet) == 0) break; 526 527 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 528 connection = avdtp_get_connection_for_avdtp_cid(cid); 529 btstack_assert(connection != NULL); 530 531 connection->a2dp_source_state = A2DP_CONNECTED; 532 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 533 break; 534 535 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 536 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 537 connection = avdtp_get_connection_for_avdtp_cid(cid); 538 btstack_assert(connection != NULL); 539 540 connection->a2dp_source_state = A2DP_CONFIGURED; 541 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 542 break; 543 544 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 545 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 546 connection = avdtp_get_connection_for_avdtp_cid(cid); 547 btstack_assert(connection != NULL); 548 549 if (connection->a2dp_source_state == A2DP_CONFIGURED){ 550 stream_endpoint_configured = false; 551 connection->a2dp_source_state = A2DP_IDLE; 552 a2dp_replace_subevent_id_and_emit_cmd(a2dp_source_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 553 } 554 break; 555 556 default: 557 break; 558 } 559 } 560 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 561 btstack_assert(callback != NULL); 562 563 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 564 a2dp_source_packet_handler_user = callback; 565 } 566 567 void a2dp_source_init(void){ 568 avdtp_source_init(); 569 } 570 571 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 572 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 573 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 574 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 575 if (!local_stream_endpoint){ 576 return NULL; 577 } 578 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 579 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 580 codec_capabilities, codec_capabilities_len); 581 582 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 583 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 584 sc.local_stream_endpoint = local_stream_endpoint; 585 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 586 return local_stream_endpoint; 587 } 588 589 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 590 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 591 if (!sc.local_stream_endpoint){ 592 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 593 } 594 595 uint8_t status = avdtp_source_connect(remote_addr, avdtp_cid); 596 if (status != ERROR_CODE_SUCCESS) return status; 597 598 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(*avdtp_cid); 599 btstack_assert(connection != NULL); 600 601 connection->a2dp_source_state = A2DP_W4_CONNECTED; 602 return ERROR_CODE_SUCCESS; 603 } 604 605 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 606 return avdtp_disconnect(avdtp_cid); 607 } 608 609 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 610 btstack_assert(sc.local_stream_endpoint != NULL); 611 612 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 613 if (connection == NULL){ 614 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 615 } 616 617 if (connection->a2dp_source_state != A2DP_STREAMING_OPENED) { 618 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 619 } 620 621 log_info("a2dp_source_reconfigure_stream"); 622 623 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 624 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 625 4); 626 627 // update sampling frequency 628 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 629 switch (sampling_frequency){ 630 case 48000: 631 config |= (AVDTP_SBC_48000 << 4); 632 break; 633 case 44100: 634 config |= (AVDTP_SBC_44100 << 4); 635 break; 636 case 32000: 637 config |= (AVDTP_SBC_32000 << 4); 638 break; 639 case 16000: 640 config |= (AVDTP_SBC_16000 << 4); 641 break; 642 default: 643 log_error("Unsupported sampling frequency %u", sampling_frequency); 644 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 645 } 646 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 647 648 avdtp_capabilities_t new_configuration; 649 new_configuration.media_codec.media_type = AVDTP_AUDIO; 650 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 651 new_configuration.media_codec.media_codec_information_len = 4; 652 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 653 654 // start reconfigure 655 connection->a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 656 657 return avdtp_source_reconfigure( 658 avdtp_cid, 659 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 660 sc.local_stream_endpoint->remote_sep.seid, 661 1 << AVDTP_MEDIA_CODEC, 662 new_configuration 663 ); 664 } 665 666 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 667 return avdtp_start_stream(avdtp_cid, local_seid); 668 } 669 670 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 671 return avdtp_suspend_stream(avdtp_cid, local_seid); 672 } 673 674 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 675 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 676 } 677 678 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 679 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 680 } 681 682 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){ 683 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 684 } 685