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gst: keep track of node ports

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Keep a list of ports for the node. When the node goes away, clear the
port links to the node. Handle the case where the port no longer has a
node.

This avoids a crash when, for example, the node permission is removed
and the port points to the now freed node_data.

Fixes #3708
This commit is contained in:
Wim Taymans 2023-12-14 13:00:00 +01:00
parent 5eb1f35997
commit ecf4b071e5
1 changed files with 17 additions and 0 deletions
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17
src/gst/gstpipewiredeviceprovider.c
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@ -180,9 +180,11 @@ struct node_data {
struct pw_node_info *info;
GstCaps *caps;
GstDevice *dev;
struct spa_list ports;
};
struct port_data {
struct spa_list link;
struct node_data *node_data;
struct pw_port *proxy;
struct spa_hook proxy_listener;
@ -353,6 +355,9 @@ static void port_event_info(void *data, const struct pw_port_info *info)
pw_log_debug("%p", port_data);
if (node_data == NULL)
return;
if (info->change_mask & PW_PORT_CHANGE_MASK_PARAMS) {
for (i = 0; i < info->n_params; i++) {
uint32_t id = info->params[i].id;
@ -375,6 +380,9 @@ static void port_event_param(void *data, int seq, uint32_t id,
struct node_data *node_data = port_data->node_data;
GstCaps *c1;
if (node_data == NULL)
return;
c1 = gst_caps_from_format (param);
if (c1 && node_data->caps)
gst_caps_append (node_data->caps, c1);
@ -438,11 +446,17 @@ static void
destroy_node (void *data)
{
struct node_data *nd = data;
struct port_data *pd;
GstPipeWireDeviceProvider *self = nd->self;
GstDeviceProvider *provider = GST_DEVICE_PROVIDER (self);
pw_log_debug("destroy %p", nd);
spa_list_consume(pd, &nd->ports, link) {
spa_list_remove(&pd->link);
pd->node_data = NULL;
}
if (nd->dev != NULL) {
gst_device_provider_device_remove (provider, GST_DEVICE (nd->dev));
}
@ -472,6 +486,7 @@ destroy_port (void *data)
{
struct port_data *pd = data;
pw_log_debug("destroy %p", pd);
spa_list_remove(&pd->link);
}
static const struct pw_proxy_events proxy_port_events = {
@ -515,6 +530,7 @@ static void registry_event_global(void *data, uint32_t id, uint32_t permissions,
nd->id = id;
if (!props || !spa_atou64(spa_dict_lookup(props, PW_KEY_OBJECT_SERIAL), &nd->serial, 0))
nd->serial = SPA_ID_INVALID;
spa_list_init(&nd->ports);
spa_list_append(&self->nodes, &nd->link);
pw_node_add_listener(node, &nd->node_listener, &node_events, nd);
pw_proxy_add_listener((struct pw_proxy*)node, &nd->proxy_listener, &proxy_node_events, nd);
@ -541,6 +557,7 @@ static void registry_event_global(void *data, uint32_t id, uint32_t permissions,
pd->id = id;
if (!props || !spa_atou64(spa_dict_lookup(props, PW_KEY_OBJECT_SERIAL), &pd->serial, 0))
pd->serial = SPA_ID_INVALID;
spa_list_append(&nd->ports, &pd->link);
pw_port_add_listener(port, &pd->port_listener, &port_events, pd);
pw_proxy_add_listener((struct pw_proxy*)port, &pd->proxy_listener, &proxy_port_events, pd);
resync(self);