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node: make add_listener method

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Make struct spa_node_events for events emited from the main thread
and keep the spa_node_callbacks for the data thread callbacks.

The add_listener method installs the events and it's possible to
install multiple handles. Adding a listener first emits the info
and port_info events when installed, similar to how the PipeWire
proxy bind works.

This removes the need for the spa_pending_queue and makes it easier
to implement the _sync versions.

Add some helpers to make it easier for plugins to emit all the info
to new listeners.

Use the listeners for devices as well.
This commit is contained in:
Wim Taymans 2019-03-01 12:00:42 +01:00
parent 61ce4e77f6
commit 0390969228
53 changed files with 1774 additions and 1307 deletions
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50
spa/plugins/v4l2/v4l2-device.c
View file

@ -63,13 +63,12 @@ struct impl {
struct props props;
const struct spa_device_callbacks *callbacks;
void *callbacks_data;
struct spa_hook_list hooks;
struct spa_v4l2_device dev;
};
static int emit_info(struct impl *this)
static int emit_info(struct impl *this, bool full)
{
int res;
struct spa_dict_item items[6];
@ -96,22 +95,18 @@ static int emit_info(struct impl *this)
info.n_params = SPA_N_ELEMENTS(params);
info.params = params;
if (this->callbacks->info)
this->callbacks->info(this->callbacks_data, &info);
spa_device_emit_info(&this->hooks, &info);
if (this->callbacks->object_info) {
if (spa_v4l2_is_capture(&this->dev)) {
struct spa_device_object_info oinfo;
if (spa_v4l2_is_capture(&this->dev)) {
struct spa_device_object_info oinfo;
oinfo = SPA_DEVICE_OBJECT_INFO_INIT();
oinfo.type = SPA_TYPE_INTERFACE_Node;
oinfo.factory = &spa_v4l2_source_factory;
oinfo.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
oinfo.props = &SPA_DICT_INIT(items, 6);
oinfo = SPA_DEVICE_OBJECT_INFO_INIT();
oinfo.type = SPA_TYPE_INTERFACE_Node;
oinfo.factory = &spa_v4l2_source_factory;
oinfo.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
oinfo.props = &SPA_DICT_INIT(items, 6);
this->callbacks->object_info(this->callbacks_data, 0, &oinfo);
}
spa_device_emit_object_info(&this->hooks, 0, &oinfo);
}
spa_v4l2_close(&this->dev);
@ -119,23 +114,26 @@ static int emit_info(struct impl *this)
return 0;
}
static int impl_set_callbacks(struct spa_device *device,
const struct spa_device_callbacks *callbacks,
void *data)
static int impl_add_listener(struct spa_device *device,
struct spa_hook *listener,
const struct spa_device_events *events,
void *data)
{
struct impl *this;
struct spa_hook_list save;
int res = 0;
spa_return_val_if_fail(device != NULL, -EINVAL);
spa_return_val_if_fail(events != NULL, -EINVAL);
this = SPA_CONTAINER_OF(device, struct impl, device);
spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
this->callbacks = callbacks;
this->callbacks_data = data;
if (events->info || events->object_info)
res = emit_info(this, true);
spa_hook_list_join(&this->hooks, &save);
if (callbacks) {
res = emit_info(this);
}
return res;
}
@ -155,7 +153,7 @@ static int impl_set_param(struct spa_device *device,
static const struct spa_device impl_device = {
SPA_VERSION_DEVICE,
impl_set_callbacks,
impl_add_listener,
impl_enum_params,
impl_set_param,
};
@ -217,6 +215,8 @@ impl_init(const struct spa_handle_factory *factory,
return -EINVAL;
}
spa_hook_list_init(&this->hooks);
this->device = impl_device;
this->dev.log = this->log;
this->dev.fd = -1;