Bluetooth: Audio: Add helpers for broadcast name

Added helper functions to set and get broadcast name
for codec capabilities and codec configs.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>

doc/releases/release-notes-4.0.rst

@@ -113,6 +113,14 @@ Bluetooth
     * :c:func:`bt_audio_codec_cap_meta_get_assisted_listening_stream`
     * :c:func:`bt_audio_codec_cap_meta_set_assisted_listening_stream`
 
+  * Added APIs for getting and setting the broadcast name in codec capabilities
+    and codec configuration:
+
+    * :c:func:`bt_audio_codec_cfg_meta_get_broadcast_name`
+    * :c:func:`bt_audio_codec_cfg_meta_set_broadcast_name`
+    * :c:func:`bt_audio_codec_cap_meta_get_broadcast_name`
+    * :c:func:`bt_audio_codec_cap_meta_set_broadcast_name`
+
 * Host
 
   * Added API :c:func:`bt_gatt_get_uatt_mtu` to get current Unenhanced ATT MTU of a given

include/zephyr/bluetooth/audio/audio.h

@@ -496,6 +496,9 @@ enum bt_audio_metadata_type {
 	 */
 	BT_AUDIO_METADATA_TYPE_ASSISTED_LISTENING_STREAM = 0x0A,
 
+	/** UTF-8 encoded Broadcast name */
+	BT_AUDIO_METADATA_TYPE_BROADCAST_NAME = 0x0B,
+
 	/** Extended metadata */
 	BT_AUDIO_METADATA_TYPE_EXTENDED = 0xFE,
 
@@ -1367,6 +1370,36 @@ int bt_audio_codec_cfg_meta_get_assisted_listening_stream(
 int bt_audio_codec_cfg_meta_set_assisted_listening_stream(
 	struct bt_audio_codec_cfg *codec_cfg, enum bt_audio_assisted_listening_stream val);
 
+/**
+ * @brief Extract broadcast name
+ *
+ * See @ref BT_AUDIO_METADATA_TYPE_BROADCAST_NAME for more information about this value.
+ *
+ * @param[in]  codec_cfg      The codec data to search in.
+ * @param[out] broadcast_name Pointer to the UTF-8 formatted broadcast name.
+ *
+ * @retval length The length of the @p broadcast_name (may be 0)
+ * @retval -EINVAL if arguments are invalid
+ * @retval -ENODATA if not found
+ */
+int bt_audio_codec_cfg_meta_get_broadcast_name(const struct bt_audio_codec_cfg *codec_cfg,
+					       const uint8_t **broadcast_name);
+
+/**
+ * @brief Set the broadcast name of a codec configuration metadata.
+ *
+ * @param codec_cfg          The codec configuration to set data for.
+ * @param broadcast_name     The broadcast name to set.
+ * @param broadcast_name_len The length of @p broadcast_name.
+ *
+ * @retval length The data_len of @p codec_cfg on success
+ * @retval -EINVAL if arguments are invalid
+ * @retval -ENOMEM if the new value could not set or added due to memory
+ */
+int bt_audio_codec_cfg_meta_set_broadcast_name(struct bt_audio_codec_cfg *codec_cfg,
+					       const uint8_t *broadcast_name,
+					       size_t broadcast_name_len);
+
 /**
  * @brief Extract extended metadata
  *
@@ -1938,6 +1971,35 @@ int bt_audio_codec_cap_meta_get_assisted_listening_stream(
 int bt_audio_codec_cap_meta_set_assisted_listening_stream(
 	struct bt_audio_codec_cap *codec_cap, enum bt_audio_assisted_listening_stream val);
 
+/**
+ * @brief Extract broadcast name
+ *
+ * See @ref BT_AUDIO_METADATA_TYPE_BROADCAST_NAME for more information about this value.
+ *
+ * @param[in]  codec_cap      The codec data to search in.
+ * @param[out] broadcast_name Pointer to the UTF-8 formatted broadcast name.
+ *
+ * @retval length The length of the @p broadcast_name (may be 0)
+ * @retval -EINVAL if arguments are invalid
+ * @retval -ENODATA if not found
+ */
+int bt_audio_codec_cap_meta_get_broadcast_name(const struct bt_audio_codec_cap *codec_cap,
+					       const uint8_t **broadcast_name);
+
+/**
+ * @brief Set the broadcast name of a codec capability metadata.
+ *
+ * @param codec_cap          The codec capability to set data for.
+ * @param broadcast_name     The broadcast name to set.
+ * @param broadcast_name_len The length of @p broadcast_name.
+ *
+ * @retval length The data_len of @p codec_cap on success
+ * @retval -EINVAL if arguments are invalid
+ * @retval -ENOMEM if the new value could not set or added due to memory
+ */
+int bt_audio_codec_cap_meta_set_broadcast_name(struct bt_audio_codec_cap *codec_cap,
+					       const uint8_t *broadcast_name,
+					       size_t broadcast_name_len);
 /**
  * @brief Extract extended metadata
  *

subsys/bluetooth/audio/codec.c

@@ -1102,6 +1102,49 @@ static int codec_meta_set_assisted_listening_stream(uint8_t meta[], size_t meta_
 				  sizeof(val_u8));
 }
 
+static int codec_meta_get_broadcast_name(const uint8_t meta[], size_t meta_len,
+					 const uint8_t **broadcast_name)
+{
+	const uint8_t *data;
+	int ret;
+
+	CHECKIF(meta == NULL) {
+		LOG_DBG("meta is NULL");
+		return -EINVAL;
+	}
+
+	CHECKIF(broadcast_name == NULL) {
+		LOG_DBG("broadcast_name is NULL");
+		return -EINVAL;
+	}
+
+	ret = codec_meta_get_val(meta, meta_len, BT_AUDIO_METADATA_TYPE_BROADCAST_NAME, &data);
+	if (data == NULL) {
+		return -ENODATA;
+	}
+
+	*broadcast_name = data;
+
+	return ret;
+}
+
+static int codec_meta_set_broadcast_name(uint8_t meta[], size_t meta_len, size_t meta_size,
+					 const uint8_t *broadcast_name, size_t broadcast_name_len)
+{
+	CHECKIF(meta == NULL) {
+		LOG_DBG("meta is NULL");
+		return -EINVAL;
+	}
+
+	CHECKIF(broadcast_name == NULL) {
+		LOG_DBG("broadcast_name is NULL");
+		return -EINVAL;
+	}
+
+	return codec_meta_set_val(meta, meta_len, meta_size, BT_AUDIO_METADATA_TYPE_BROADCAST_NAME,
+				  broadcast_name, broadcast_name_len);
+}
+
 static int codec_meta_get_extended(const uint8_t meta[], size_t meta_len,
 				   const uint8_t **extended_meta)
 {
@@ -1547,6 +1590,33 @@ int bt_audio_codec_cfg_meta_set_vendor(struct bt_audio_codec_cfg *codec_cfg,
 
 	return ret;
 }
+
+int bt_audio_codec_cfg_meta_get_broadcast_name(const struct bt_audio_codec_cfg *codec_cfg,
+					       const uint8_t **broadcast_name)
+{
+	CHECKIF(codec_cfg == NULL) {
+		LOG_DBG("codec_cfg is NULL");
+		return -EINVAL;
+	}
+
+	return codec_meta_get_broadcast_name(codec_cfg->meta, codec_cfg->meta_len, broadcast_name);
+}
+
+int bt_audio_codec_cfg_meta_set_broadcast_name(struct bt_audio_codec_cfg *codec_cfg,
+					       const uint8_t *broadcast_name,
+					       size_t broadcast_name_len)
+{
+	int ret;
+
+	ret = codec_meta_set_broadcast_name(codec_cfg->meta, codec_cfg->meta_len,
+					    ARRAY_SIZE(codec_cfg->meta), broadcast_name,
+					    broadcast_name_len);
+	if (ret >= 0) {
+		codec_cfg->meta_len = ret;
+	}
+
+	return ret;
+}
 #endif /* CONFIG_BT_AUDIO_CODEC_CFG_MAX_METADATA_SIZE > 0 */
 
 #if CONFIG_BT_AUDIO_CODEC_CAP_MAX_METADATA_SIZE > 0
@@ -1900,6 +1970,33 @@ int bt_audio_codec_cap_meta_set_vendor(struct bt_audio_codec_cap *codec_cap,
 
 	return ret;
 }
+
+int bt_audio_codec_cap_meta_get_broadcast_name(const struct bt_audio_codec_cap *codec_cap,
+					       const uint8_t **broadcast_name)
+{
+	CHECKIF(codec_cap == NULL) {
+		LOG_DBG("codec_cap is NULL");
+		return -EINVAL;
+	}
+
+	return codec_meta_get_broadcast_name(codec_cap->meta, codec_cap->meta_len, broadcast_name);
+}
+
+int bt_audio_codec_cap_meta_set_broadcast_name(struct bt_audio_codec_cap *codec_cap,
+					       const uint8_t *broadcast_name,
+					       size_t broadcast_name_len)
+{
+	int ret;
+
+	ret = codec_meta_set_broadcast_name(codec_cap->meta, codec_cap->meta_len,
+					    ARRAY_SIZE(codec_cap->meta), broadcast_name,
+					    broadcast_name_len);
+	if (ret >= 0) {
+		codec_cap->meta_len = ret;
+	}
+
+	return ret;
+}
 #endif /* CONFIG_BT_AUDIO_CODEC_CAP_MAX_METADATA_SIZE > 0 */
 #endif /* CONFIG_BT_AUDIO_CODEC_CFG_MAX_METADATA_SIZE > 0 ||                                       \
 	* CONFIG_BT_AUDIO_CODEC_CAP_MAX_METADATA_SIZE > 0                                          \

tests/bluetooth/audio/codec/src/main.c

@@ -959,6 +959,45 @@ ZTEST(audio_codec_test_suite, test_bt_audio_codec_cfg_meta_set_assisted_listenin
 	zassert_equal(ret, 0x00, "Unexpected return value %d", ret);
 }
 
+ZTEST(audio_codec_test_suite, test_bt_audio_codec_cfg_meta_get_broadcast_name)
+{
+	const uint8_t expected_data[] = {'m', 'y', ' ', 'b', 'c', 'a', 's', 't'};
+	const struct bt_audio_codec_cfg codec_cfg =
+		BT_AUDIO_CODEC_CFG(BT_HCI_CODING_FORMAT_LC3, 0x0000, 0x0000, {},
+				   {BT_AUDIO_CODEC_DATA(BT_AUDIO_METADATA_TYPE_BROADCAST_NAME, 'm',
+							'y', ' ', 'b', 'c', 'a', 's', 't')});
+	const uint8_t *broadcast_name;
+	int ret;
+
+	ret = bt_audio_codec_cfg_meta_get_broadcast_name(&codec_cfg, &broadcast_name);
+	zassert_equal(ret, ARRAY_SIZE(expected_data), "Unexpected return value %d", ret);
+	zassert_mem_equal(expected_data, broadcast_name, ARRAY_SIZE(expected_data));
+}
+
+ZTEST(audio_codec_test_suite, test_bt_audio_codec_cfg_meta_set_broadcast_name)
+{
+	const uint8_t expected_data[] = {'m', 'y', ' ', 'b', 'c', 'a', 's', 't'};
+	const uint8_t new_expected_data[] = {'n', 'e', 'w', ' ', 'b', 'c', 'a', 's', 't'};
+	struct bt_audio_codec_cfg codec_cfg =
+		BT_AUDIO_CODEC_CFG(BT_HCI_CODING_FORMAT_LC3, 0x0000, 0x0000, {},
+				   {BT_AUDIO_CODEC_DATA(BT_AUDIO_METADATA_TYPE_BROADCAST_NAME, 'm',
+							'y', ' ', 'b', 'c', 'a', 's', 't')});
+	const uint8_t *broadcast_name;
+	int ret;
+
+	ret = bt_audio_codec_cfg_meta_get_broadcast_name(&codec_cfg, &broadcast_name);
+	zassert_equal(ret, ARRAY_SIZE(expected_data), "Unexpected return value %d", ret);
+	zassert_mem_equal(expected_data, broadcast_name, ARRAY_SIZE(expected_data));
+
+	ret = bt_audio_codec_cfg_meta_set_broadcast_name(&codec_cfg, new_expected_data,
+							 ARRAY_SIZE(new_expected_data));
+	zassert_true(ret > 0, "Unexpected return value %d", ret);
+
+	ret = bt_audio_codec_cfg_meta_get_broadcast_name(&codec_cfg, &broadcast_name);
+	zassert_equal(ret, ARRAY_SIZE(new_expected_data), "Unexpected return value %d", ret);
+	zassert_mem_equal(new_expected_data, broadcast_name, ARRAY_SIZE(new_expected_data));
+}
+
 ZTEST(audio_codec_test_suite, test_bt_audio_codec_cfg_meta_get_extended)
 {
 	const uint8_t expected_data[] = {0x00, 0x01, 0x02, 0x03};
@@ -1873,6 +1912,45 @@ ZTEST(audio_codec_test_suite, test_bt_audio_codec_cap_meta_set_assisted_listenin
 	zassert_equal(ret, 0x00, "Unexpected return value %d", ret);
 }
 
+ZTEST(audio_codec_test_suite, test_bt_audio_codec_cap_meta_get_broadcast_name)
+{
+	const uint8_t expected_data[] = {'m', 'y', ' ', 'b', 'c', 'a', 's', 't'};
+	const struct bt_audio_codec_cap codec_cap =
+		BT_AUDIO_CODEC_CAP(BT_HCI_CODING_FORMAT_LC3, 0x0000, 0x0000, {},
+				   {BT_AUDIO_CODEC_DATA(BT_AUDIO_METADATA_TYPE_BROADCAST_NAME, 'm',
+							'y', ' ', 'b', 'c', 'a', 's', 't')});
+	const uint8_t *broadcast_name;
+	int ret;
+
+	ret = bt_audio_codec_cap_meta_get_broadcast_name(&codec_cap, &broadcast_name);
+	zassert_equal(ret, ARRAY_SIZE(expected_data), "Unexpected return value %d", ret);
+	zassert_mem_equal(expected_data, broadcast_name, ARRAY_SIZE(expected_data));
+}
+
+ZTEST(audio_codec_test_suite, test_bt_audio_codec_cap_meta_set_broadcast_name)
+{
+	const uint8_t expected_data[] = {'m', 'y', ' ', 'b', 'c', 'a', 's', 't'};
+	const uint8_t new_expected_data[] = {'n', 'e', 'w', ' ', 'b', 'c', 'a', 's', 't'};
+	struct bt_audio_codec_cap codec_cap =
+		BT_AUDIO_CODEC_CAP(BT_HCI_CODING_FORMAT_LC3, 0x0000, 0x0000, {},
+				   {BT_AUDIO_CODEC_DATA(BT_AUDIO_METADATA_TYPE_BROADCAST_NAME, 'm',
+							'y', ' ', 'b', 'c', 'a', 's', 't')});
+	const uint8_t *broadcast_name;
+	int ret;
+
+	ret = bt_audio_codec_cap_meta_get_broadcast_name(&codec_cap, &broadcast_name);
+	zassert_equal(ret, ARRAY_SIZE(expected_data), "Unexpected return value %d", ret);
+	zassert_mem_equal(expected_data, broadcast_name, ARRAY_SIZE(expected_data));
+
+	ret = bt_audio_codec_cap_meta_set_broadcast_name(&codec_cap, new_expected_data,
+							 ARRAY_SIZE(new_expected_data));
+	zassert_true(ret > 0, "Unexpected return value %d", ret);
+
+	ret = bt_audio_codec_cap_meta_get_broadcast_name(&codec_cap, &broadcast_name);
+	zassert_equal(ret, ARRAY_SIZE(new_expected_data), "Unexpected return value %d", ret);
+	zassert_mem_equal(new_expected_data, broadcast_name, ARRAY_SIZE(new_expected_data));
+}
+
 ZTEST(audio_codec_test_suite, test_bt_audio_codec_cap_meta_get_extended)
 {
 	const uint8_t expected_data[] = {0x00, 0x01, 0x02, 0x03};