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alsa: report extra latency for FireWire drivers

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Based on testing, ALSA FireWire drivers introduce additional latency
determined by the buffer size.

Report that latency.

Pass device.bus to the node, so it can recognize firewire.
This commit is contained in:
Pauli Virtanen 2025-09-06 19:14:22 +03:00 • committed by Wim Taymans
parent 916896c1cc
commit bf783ab08f
3 changed files with 14 additions and 2 deletions
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6
spa/plugins/alsa/alsa-acp-device.c
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@ -160,7 +160,7 @@ static int emit_node(struct impl *this, struct acp_device *dev)
char codecs[512];
struct spa_device_object_info info;
struct acp_card *card = this->card;
const char *stream, *card_id;
const char *stream, *card_id, *bus;
info = SPA_DEVICE_OBJECT_INFO_INIT();
info.type = SPA_TYPE_INTERFACE_Node;
@ -175,7 +175,7 @@ static int emit_node(struct impl *this, struct acp_device *dev)
info.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
items = alloca((dev->props.n_items + 11) * sizeof(*items));
items = alloca((dev->props.n_items + 12) * sizeof(*items));
n_items = 0;
snprintf(card_index, sizeof(card_index), "%d", card->index);
@ -193,6 +193,8 @@ static int emit_node(struct impl *this, struct acp_device *dev)
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_STREAM, stream);
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_GROUP, stream);
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_ICON_NAME, "audio-card-analog");
bus = acp_dict_lookup(&card->props, SPA_KEY_DEVICE_BUS);
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_BUS, bus);
snprintf(channels, sizeof(channels), "%d", dev->format.channels);
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_AUDIO_CHANNELS, channels);