implementation of Auracast package

This is simplified wrapper for Broadcast, that allows to create Broadcast advertisements with sane defaults for advertising parameters. Application still needs to build BASE configuration to use it.
2026-08-15 06:27:55 +00:00 · 2023-12-04 09:27:13 +01:00
parent ca7aeaad9e
commit 043bf6ea5b
2 changed files with 158 additions and 0 deletions
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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.
+#
+
+pkg.name: nimble/host/services/auracast
+pkg.description: Implements Auracast service
+pkg.author: "Apache Mynewt <[email protected]>"
+pkg.homepage: "http://mynewt.apache.org/"
+pkg.keywords:
+  - ble
+  - bluetooth
+  - auracast
+  - nimble
+
+pkg.deps:
+  - nimble/host
@@ -0,0 +1,128 @@
+/*
+ * 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 "syscfg/syscfg.h"
+
+#include "host/ble_gap.h"
+#include "host/ble_hs.h"
+#include "host/ble_audio_broadcast.h"
+#include "services/auracast/ble_svc_auracast.h"
+
+int
+ble_svc_auracast_create(const struct ble_svc_auracast_create_params *params,
+                        uint8_t *auracast_instance,
+                        ble_audio_broadcast_destroy_fn *destroy_cb,
+                        void *args, ble_gap_event_fn *gap_cb)
+{
+    struct ble_broadcast_create_params create_params;
+    struct ble_gap_periodic_adv_params periodic_params = { 0 };
+    struct ble_gap_ext_adv_params extended_params = {
+        .scannable = 0,
+        .connectable = 0,
+        .primary_phy = BLE_HCI_LE_PHY_1M,
+    };
+    uint8_t adv_instance;
+    uint8_t auracast_svc_data[251] = { 0 };
+    uint8_t data_offset = 1;
+
+    uint8_t features = 0;
+
+    features |= params->big_params->encryption;
+
+    if ((params->frame_duration == 10000) &&
+        (((params->sampling_frequency == 16000) &&
+          (params->bitrate == 32000)) ||
+         ((params->sampling_frequency == 24000) &&
+          (params->bitrate == 48000)))) {
+        features |= 0x02;
+    }
+
+    if (params->sampling_frequency == 48000) {
+        features |= 0x04;
+    }
+
+
+    auracast_svc_data[data_offset] = BLE_HS_ADV_TYPE_SVC_DATA_UUID16;
+    data_offset++;
+    put_le16(&auracast_svc_data[data_offset], 0x1856);
+    data_offset += 2;
+    auracast_svc_data[data_offset] = features;
+    data_offset++;
+    /** Metadata */
+    if (params->program_info != NULL) {
+        auracast_svc_data[data_offset] = strlen(params->program_info) + 2;
+        data_offset++;
+        auracast_svc_data[data_offset] = strlen(params->program_info) + 1;
+        data_offset++;
+        auracast_svc_data[data_offset] = 3;
+        data_offset++;
+        memcpy(&auracast_svc_data[data_offset], params->program_info,
+               strlen(params->program_info));
+        data_offset += strlen(params->program_info);
+    }
+
+    auracast_svc_data[0] = data_offset - 1;
+
+    adv_instance = ble_gap_adv_get_free_instance();
+    if (adv_instance < 0) {
+        return BLE_HS_ENOENT;
+    }
+
+    if (params->secondary_phy == BLE_HCI_LE_PHY_2M &&
+        !MYNEWT_VAL(BLE_PHY_2M)) {
+        return BLE_HS_EINVAL;
+    }
+
+    extended_params.own_addr_type = params->own_addr_type;
+    extended_params.sid = params->sid;
+    extended_params.secondary_phy = params->secondary_phy;
+
+    create_params.base = params->base;
+    create_params.extended_params = &extended_params;
+    create_params.periodic_params = &periodic_params;
+    create_params.name = params->name;
+    create_params.adv_instance = adv_instance;
+    create_params.big_params = params->big_params;
+    create_params.svc_data = auracast_svc_data;
+    create_params.svc_data_len = data_offset;
+
+    *auracast_instance = adv_instance;
+
+    return ble_audio_broadcast_create(&create_params,
+                                      destroy_cb, args, gap_cb);
+}
+
+int
+ble_svc_auracast_terminate(uint8_t auracast_instance)
+{
+    return ble_audio_broadcast_destroy(auracast_instance);
+}
+
+int
+ble_svc_auracast_start(uint8_t auracast_instance, ble_iso_event_fn *cb, void *cb_arg)
+{
+
+    return ble_audio_broadcast_start(auracast_instance, cb, cb_arg);
+}
+
+int
+ble_svc_auracast_stop(uint8_t auracast_instance)
+{
+    return ble_audio_broadcast_stop(auracast_instance);
+}