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[wip] nimble/host: initial Broadcast Sink implementation
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
|
||
| #include "ble_hs_adv_priv.h" | ||
| #include "host/ble_gap.h" | ||
| #include "host/ble_uuid.h" | ||
| #include "host/ble_audio_broadcast_sink.h" | ||
|
|
||
| #if MYNEWT_VAL(BLE_ISO_BROADCAST_SINK) | ||
|
|
||
| #ifndef min | ||
| #define min(a, b) ((a) < (b) ? (a) : (b)) | ||
| #endif | ||
|
|
||
| struct uuid_found_status { | ||
| ble_uuid_any_t uuid_to_find; | ||
| const uint8_t *svc_data; | ||
| uint8_t svc_data_len; | ||
| }; | ||
|
|
||
| static struct { | ||
| uint8_t filter_policy; | ||
| ble_uuid_any_t uuid; | ||
| uint32_t broadcast_id; | ||
|
|
||
| ble_audio_broadcast_fn *cb; | ||
| void *cb_arg; | ||
| } broadcast_sink_event_handler; | ||
|
|
||
| static int | ||
| find_uuid_func(const struct ble_hs_adv_field *field, void *user_data) | ||
| { | ||
| struct uuid_found_status *uuid_find_status = user_data; | ||
| uint8_t svc_uuid_type_to_find; | ||
| ble_uuid_any_t svc_uuid; | ||
| int match_result; | ||
|
|
||
| switch (uuid_find_status->uuid_to_find.u.type) { | ||
| case BLE_UUID_TYPE_16: | ||
| if (field->type != BLE_HS_ADV_TYPE_SVC_DATA_UUID16) { | ||
| return BLE_HS_ENOENT; | ||
| } | ||
|
|
||
| match_result = (uuid_find_status->uuid_to_find.u16.value == | ||
| get_le16(field->value)); | ||
| break; | ||
| case BLE_UUID_TYPE_32: | ||
| if (field->type != BLE_HS_ADV_TYPE_SVC_DATA_UUID32) { | ||
| return BLE_HS_ENOENT; | ||
| } | ||
|
|
||
| match_result = (uuid_find_status->uuid_to_find.u32.value == | ||
| get_le32(field->value)); | ||
| break; | ||
| case BLE_UUID_TYPE_128: | ||
| if (field->type != BLE_HS_ADV_TYPE_SVC_DATA_UUID128) { | ||
| return BLE_HS_ENOENT; | ||
| } | ||
| match_result = !memcmp(uuid_find_status->uuid_to_find.u128.value, | ||
| field->value, 16); | ||
| break; | ||
| default: | ||
| return BLE_HS_EINVAL; | ||
| } | ||
|
|
||
| if (match_result) { | ||
| uuid_find_status->svc_data = field->value; | ||
| uuid_find_status->svc_data_len = field->length; | ||
| return 0; | ||
| } | ||
|
|
||
| return BLE_HS_ENOENT; | ||
| } | ||
|
|
||
| static int | ||
| ble_audio_broadcast_sink_gap_event(struct ble_gap_event *event, void *arg) | ||
| { | ||
| struct ble_broadcast_event ev; | ||
| const struct ble_hs_adv_field *parsed_ad_field; | ||
| struct uuid_found_status uuid_find_status = { | ||
| .uuid_to_find = broadcast_sink_event_handler.uuid, | ||
| .svc_data = NULL, | ||
| .svc_data_len = 0 | ||
| }; | ||
| uint8_t data_offset = 0; | ||
| uint8_t subgroup_num_bis; | ||
| uint8_t bis_cnt; | ||
| uint8_t i, j; | ||
|
|
||
| switch (event->type) { | ||
| case BLE_GAP_EVENT_EXT_DISC: | ||
| if ((broadcast_sink_event_handler.filter_policy & | ||
| BLE_BROADCAST_FILT_USE_UUID)) { | ||
| ble_hs_adv_parse(event->ext_disc.data, event->ext_disc.length_data, | ||
| find_uuid_func, &uuid_find_status); | ||
|
|
||
| if (!uuid_find_status.svc_data) { | ||
| return 0; | ||
| } | ||
|
|
||
| if (uuid_find_status.uuid_to_find.u16.value == | ||
| BLE_BROADCAST_PUBLIC_BROADCAST_ANNOUNCEMENT_SVC_UUID) { | ||
| ev.announcement_found.desc.pbas_features = | ||
| uuid_find_status.svc_data[2]; | ||
| ev.announcement_found.desc.pbas_metadata_len = | ||
| uuid_find_status.svc_data[3]; | ||
| ev.announcement_found.desc.pbas_metadata = | ||
| uuid_find_status.svc_data + 4; | ||
| } | ||
| } | ||
| uuid_find_status.uuid_to_find.u16.u.type = | ||
| BLE_HS_ADV_TYPE_SVC_DATA_UUID16; | ||
| uuid_find_status.uuid_to_find.u16.value = | ||
| BLE_BROADCAST_AUDIO_ANNOUNCEMENT_SVC_UUID; | ||
| uuid_find_status.svc_data = NULL; | ||
| uuid_find_status.svc_data_len = 0; | ||
|
|
||
| ble_hs_adv_parse(event->ext_disc.data, | ||
| event->ext_disc.length_data, | ||
| find_uuid_func, &uuid_find_status); | ||
| ev.type = BLE_BROADCAST_EVENT_BAA_FOUND; | ||
| ev.announcement_found.desc.broadcast_id = get_le24 | ||
| (uuid_find_status.svc_data + 2); | ||
|
|
||
| if ((broadcast_sink_event_handler.filter_policy & | ||
| BLE_BROADCAST_FILT_USE_BROADCAST_ID) && | ||
| broadcast_sink_event_handler.broadcast_id != | ||
| ev.announcement_found.desc.broadcast_id) { | ||
| return 0; | ||
| } | ||
|
|
||
| ev.announcement_found.desc.sync_info.addr = event->ext_disc.addr; | ||
| ev.announcement_found.desc.sync_info.adv_sid = event->ext_disc.sid; | ||
| break; | ||
| case BLE_GAP_EVENT_DISC_COMPLETE: | ||
| ev.type = BLE_BROADCAST_EVENT_DISC_COMPLETE; | ||
| ev.disc_complete.reason = event->disc_complete.reason; | ||
| break; | ||
| case BLE_GAP_EVENT_PERIODIC_SYNC: | ||
| ev.type = BLE_BROADCAST_EVENT_SYNC_ESTABLISHED; | ||
| ev.sync_established.sync_info.addr = event->periodic_sync.adv_addr; | ||
| ev.sync_established.sync_info.adv_sid = event->periodic_sync.sid; | ||
| case BLE_GAP_EVENT_PERIODIC_SYNC_LOST: | ||
| ev.type = BLE_BROADCAST_EVENT_SYNC_LOST; | ||
| ev.sync_lost.sync_handle = event->periodic_sync_lost.sync_handle; | ||
| ev.sync_lost.reason = event->periodic_sync_lost.reason; | ||
| case BLE_GAP_EVENT_PERIODIC_REPORT: | ||
| uuid_find_status.uuid_to_find.u16.u.type = | ||
| BLE_HS_ADV_TYPE_SVC_DATA_UUID16; | ||
| uuid_find_status.uuid_to_find.u16.value = | ||
| BLE_BROADCAST_AUDIO_ANNOUNCEMENT_SVC_UUID; | ||
| ble_hs_adv_parse(event->periodic_report.data, | ||
| event->periodic_report.data_length, | ||
| find_uuid_func, &uuid_find_status); | ||
|
|
||
| ev.type = BLE_BROADCAST_EVENT_BASE_READ; | ||
| data_offset += 2; | ||
| ev.base_read.base.presentation_delay = | ||
| get_le24(uuid_find_status.svc_data + data_offset); | ||
| data_offset += 3; | ||
| ev.base_read.base.num_subgroups = uuid_find_status.svc_data[data_offset]; | ||
| data_offset++; | ||
| for (i = 0; i < ev.base_read.base.num_subgroups; i++) { | ||
| subgroup_num_bis = uuid_find_status.svc_data[data_offset]; | ||
| data_offset++; | ||
| ev.base_read.base.subgroup[i].num_bis = subgroup_num_bis; | ||
| bis_cnt += subgroup_num_bis; | ||
|
|
||
| if (bis_cnt > MYNEWT_VAL(BLE_MAX_BIS)) { | ||
| return BLE_HS_ENOMEM; | ||
| } | ||
|
|
||
| memcpy(&ev.base_read.base.subgroup[i].codec_id, | ||
| &uuid_find_status.svc_data[data_offset], 5); | ||
| data_offset += 5; | ||
| ev.base_read.base.subgroup[i].codec_specific_conf_len = | ||
| uuid_find_status.svc_data[data_offset]; | ||
| data_offset++; | ||
|
|
||
| if (ev.base_read.base.subgroup[i].codec_specific_conf_len > | ||
| BLE_AUDIO_BROADCAST_CODEC_SPEC_CONF_MAX_SZ) { | ||
| return BLE_HS_EINVAL; | ||
| } | ||
|
|
||
| memcpy(ev.base_read.base.subgroup[i].codec_specific_conf, | ||
| &uuid_find_status.svc_data[data_offset], | ||
| ev.base_read.base.subgroup[i].codec_specific_conf_len); | ||
| data_offset += | ||
| ev.base_read.base.subgroup[i].codec_specific_conf_len; | ||
|
|
||
| ev.base_read.base.subgroup[i].metadata_len = | ||
| uuid_find_status.svc_data[data_offset]; | ||
| data_offset++; | ||
|
|
||
| if (ev.base_read.base.subgroup[i].metadata_len > | ||
| MYNEWT_VAL(BLE_AUDIO_BROADCAST_PBA_METADATA_MAX_SZ)) { | ||
| return BLE_HS_EINVAL; | ||
| } | ||
|
|
||
| memcpy(ev.base_read.base.subgroup[i].metadata, | ||
| &uuid_find_status.svc_data[data_offset], | ||
| ev.base_read.base.subgroup[i].metadata_len); | ||
| data_offset += ev.base_read.base.subgroup[i].metadata_len; | ||
|
|
||
| for (j = 0; j < subgroup_num_bis; j++) { | ||
| ev.base_read.base.subgroup[i].bis[j].subgroup = i; | ||
| ev.base_read.base.subgroup[i].bis[j].bis_idx = | ||
| uuid_find_status.svc_data[data_offset]; | ||
| data_offset++; | ||
| ev.base_read.base.subgroup[i].bis[j].codec_specific_conf_len = | ||
| min(uuid_find_status.svc_data[data_offset], | ||
| BLE_AUDIO_BROADCAST_CODEC_SPEC_CONF_MAX_SZ); | ||
| data_offset++; | ||
| memcpy(&ev.base_read.base.subgroup[i].bis[j].codec_specific_conf, | ||
| &uuid_find_status.svc_data[data_offset], | ||
| min(ev.base_read.base.subgroup[i].bis[j].codec_specific_conf_len, | ||
| BLE_AUDIO_BROADCAST_CODEC_SPEC_CONF_MAX_SZ)); | ||
| data_offset += 5; | ||
| } | ||
| } | ||
| default: | ||
| return 0; | ||
| } | ||
| broadcast_sink_event_handler.cb(&ev, broadcast_sink_event_handler.cb_arg); | ||
| return 0; | ||
| } | ||
|
|
||
| int | ||
| ble_audio_broadcast_baa_disc(uint8_t own_addr_type, uint16_t duration, | ||
| uint8_t filter_policy, | ||
| const struct ble_gap_ext_disc_params *uncoded_params, | ||
| const struct ble_gap_ext_disc_params *coded_params, | ||
| const ble_uuid_t *uuid, | ||
| uint32_t broadcast_id, | ||
| ble_audio_broadcast_fn *cb, void *cb_arg) | ||
| { | ||
| if (filter_policy == BLE_BROADCAST_FILT_USE_UUID && !uuid) { | ||
| return BLE_HS_EINVAL; | ||
| } | ||
|
|
||
| broadcast_sink_event_handler.cb = cb; | ||
| broadcast_sink_event_handler.cb_arg = cb_arg; | ||
| broadcast_sink_event_handler.filter_policy = filter_policy; | ||
|
|
||
| if (uuid) { | ||
| ble_uuid_copy(&broadcast_sink_event_handler.uuid, uuid); | ||
| } | ||
|
|
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| broadcast_sink_event_handler.broadcast_id = broadcast_id; | ||
|
|
||
| return ble_gap_ext_disc(own_addr_type, duration, 0, 1, | ||
| BLE_HCI_CONN_FILT_NO_WL, 0, uncoded_params, | ||
| coded_params, ble_audio_broadcast_sink_gap_event, | ||
| NULL); | ||
| } | ||
|
|
||
| #endif |