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node: use intermediate pending state

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Use an intermediate pending state that contains the state currently
in progress and use this to decide if we need to issue start/stop
commands.

Otherwise we might be in the running state, issue a Stop command,
issue a Start command (ignored because already running), then the
Stop completes and the node is stopped.
This commit is contained in:
Wim Taymans 2020-07-15 14:11:01 +02:00
parent 6dcb19bbdf
commit 77274b3ab0
1 changed files with 10 additions and 3 deletions
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13
src/pipewire/impl-node.c
View file

@ -45,6 +45,8 @@
struct impl {
struct pw_impl_node this;
enum pw_node_state pending;
struct pw_work_queue *work;
int last_error;
@ -162,7 +164,7 @@ static int pause_node(struct pw_impl_node *this)
pw_log_debug(NAME" %p: pause node state:%s pause-on-idle:%d", this,
pw_node_state_as_string(this->info.state), impl->pause_on_idle);
if (this->info.state <= PW_NODE_STATE_IDLE)
if (impl->pending <= PW_NODE_STATE_IDLE)
return 0;
node_deactivate(this);
@ -179,9 +181,10 @@ static int pause_node(struct pw_impl_node *this)
static int start_node(struct pw_impl_node *this)
{
struct impl *impl = SPA_CONTAINER_OF(this, struct impl, this);
int res = 0;
if (this->info.state >= PW_NODE_STATE_RUNNING)
if (impl->pending >= PW_NODE_STATE_RUNNING)
return 0;
pw_log_debug(NAME" %p: start node", this);
@ -285,11 +288,13 @@ do_node_add(struct spa_loop *loop,
static void node_update_state(struct pw_impl_node *node, enum pw_node_state state, char *error)
{
struct impl *impl = SPA_CONTAINER_OF(node, struct impl, this);
enum pw_node_state old = node->info.state;
free((char*)node->info.error);
node->info.error = error;
node->info.state = state;
impl->pending = state;
if (old == state)
return;
@ -1862,7 +1867,7 @@ int pw_impl_node_set_state(struct pw_impl_node *node, enum pw_node_state state)
{
int res = 0;
struct impl *impl = SPA_CONTAINER_OF(node, struct impl, this);
enum pw_node_state old = node->info.state;
enum pw_node_state old = impl->pending;
pw_log_debug(NAME" %p: set state %s -> %s, active %d", node,
pw_node_state_as_string(old),
@ -1901,6 +1906,8 @@ int pw_impl_node_set_state(struct pw_impl_node *node, enum pw_node_state state)
if (SPA_RESULT_IS_ASYNC(res)) {
res = spa_node_sync(node->node, res);
}
impl->pending = state;
if (old != state)
pw_work_queue_add(impl->work,
node, res, on_state_complete, SPA_INT_TO_PTR(state));