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Bluetooth: Audio: Add broadcast source metadata update function

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Add API to do the BAP Broadcast Source Metadata update procedure,
which updates the metadata of a broadcast source while
it is streaming.

This is also makes all checks for the "head stream" the same.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
This commit is contained in:
Emil Gydesen 2022-06-28 20:09:13 +02:00 • committed by Carles Cufí
commit 1424df424c
4 changed files with 128 additions and 1 deletions
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75
subsys/bluetooth/audio/broadcast_source.c
View file

@ -765,6 +765,81 @@ int bt_audio_broadcast_source_reconfig(struct bt_audio_broadcast_source *source,
return 0;
}
static void broadcast_source_store_metadata(struct bt_codec *codec,
const struct bt_codec_data meta[],
size_t meta_count)
{
size_t old_meta_count;
old_meta_count = codec->meta_count;
/* Update metadata */
codec->meta_count = meta_count;
(void)memcpy(codec->meta, meta, meta_count * sizeof(*meta));
if (old_meta_count > meta_count) {
size_t meta_count_diff = old_meta_count - meta_count;
/* If we previously had more metadata entries we reset the
* data that was not overwritten by the new metadata
*/
(void)memset(&codec->meta[meta_count],
0, meta_count_diff * sizeof(*meta));
}
}
int bt_audio_broadcast_source_update_metadata(struct bt_audio_broadcast_source *source,
const struct bt_codec_data meta[],
size_t meta_count)
{
struct bt_audio_broadcast_subgroup *subgroup;
enum bt_audio_state broadcast_state;
CHECKIF(source == NULL) {
LOG_DBG("source is NULL");
return -EINVAL;
}
CHECKIF((meta == NULL && meta_count != 0) ||
(meta != NULL && meta_count == 0)) {
LOG_DBG("Invalid metadata combination: %p %zu",
meta, meta_count);
return -EINVAL;
}
CHECKIF(meta_count > CONFIG_BT_CODEC_MAX_METADATA_COUNT) {
LOG_DBG("Invalid meta_count: %zu (max %d)",
meta_count, CONFIG_BT_CODEC_MAX_METADATA_COUNT);
return -EINVAL;
}
for (size_t i = 0; i < meta_count; i++) {
CHECKIF(meta[i].data.data_len > sizeof(meta[i].value)) {
LOG_DBG("Invalid meta[%zu] data_len %u",
i, meta[i].data.data_len);
return -EINVAL;
}
}
broadcast_state = broadcast_source_get_state(source);
if (broadcast_source_get_state(source) != BT_AUDIO_EP_STATE_STREAMING) {
LOG_DBG("Broadcast source invalid state: %u", broadcast_state);
return -EBADMSG;
}
/* TODO: We should probably find a way to update the metadata
* for each subgroup individually
*/
SYS_SLIST_FOR_EACH_CONTAINER(&source->subgroups, subgroup, _node) {
broadcast_source_store_metadata(subgroup->codec, meta, meta_count);
}
return 0;
}
int bt_audio_broadcast_source_start(struct bt_audio_broadcast_source *source,
struct bt_le_ext_adv *adv)
{