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spa: alsa,v4l2: avoid double lookup on inotify events

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Split up `process_{device,card}()` to have a separate function that does
the lookup based on the udev device, and only use that when there is
no available reference to the actual device/card object.
This commit is contained in:
Barnabás Pőcze 2024-01-09 18:00:36 +01:00
parent 57a5417703
commit 69f9e75458
2 changed files with 61 additions and 59 deletions
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57
spa/plugins/v4l2/v4l2-udev.c
View file

@ -359,48 +359,51 @@ static bool check_access(struct impl *this, struct device *device)
return device->accessible;
}
static void process_device(struct impl *this, enum action action, struct udev_device *dev)
static void process_device(struct impl *this, enum action action, struct device *device)
{
uint32_t id;
struct device *device;
bool emitted;
if ((id = get_device_id(this, dev)) == SPA_ID_INVALID)
return;
device = find_device(this, id);
switch (action) {
case ACTION_ADD:
if (device == NULL)
device = add_device(this, id, dev);
if (device == NULL)
return;
if (!check_access(this, device))
return;
emit_object_info(this, device);
break;
case ACTION_REMOVE: {
bool emitted = device->emitted;
uint32_t id = device->id;
case ACTION_REMOVE:
if (device == NULL)
return;
emitted = device->emitted;
remove_device(this, device);
if (emitted)
spa_device_emit_object_info(&this->hooks, id, NULL);
break;
}
case ACTION_DISABLE:
if (device == NULL)
return;
if (device->emitted) {
device->emitted = false;
spa_device_emit_object_info(&this->hooks, id, NULL);
spa_device_emit_object_info(&this->hooks, device->id, NULL);
}
break;
}
}
static void process_udev_device(struct impl *this, enum action action, struct udev_device *udev_device)
{
struct device *device;
uint32_t id;
if ((id = get_device_id(this, udev_device)) == SPA_ID_INVALID)
return;
device = find_device(this, id);
if (action == ACTION_ADD && !device)
device = add_device(this, id, udev_device);
if (!device)
return;
process_device(this, action, device);
}
static int stop_inotify(struct impl *this)
{
if (this->notify.fd == -1)
@ -453,9 +456,9 @@ static void impl_on_notify_events(struct spa_source *source)
bool access = check_access(this, device);
if (access && !device->emitted)
process_device(this, ACTION_ADD, device->dev);
process_device(this, ACTION_ADD, device);
else if (!access && device->emitted)
process_device(this, ACTION_DISABLE, device->dev);
process_device(this, ACTION_DISABLE, device);
}
}
}
@ -504,9 +507,9 @@ static void impl_on_fd_events(struct spa_source *source)
if (spa_streq(action, "add") ||
spa_streq(action, "change")) {
process_device(this, ACTION_ADD, dev);
process_udev_device(this, ACTION_ADD, dev);
} else if (spa_streq(action, "remove")) {
process_device(this, ACTION_REMOVE, dev);
process_udev_device(this, ACTION_REMOVE, dev);
}
udev_device_unref(dev);
}
@ -576,7 +579,7 @@ static int enum_devices(struct impl *this)
if (dev == NULL)
continue;
process_device(this, ACTION_ADD, dev);
process_udev_device(this, ACTION_ADD, dev);
udev_device_unref(dev);
}