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bluez5: emit props change events only if values actually changed

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This may avoid infinite loops if parameters are being set based on events
sent by parameter changes. It's also what alsa-acp devices do, so bluez5
should follow.
This commit is contained in:
Pauli Virtanen 2021-02-25 19:55:04 +02:00
parent 302282ef59
commit 4389e44903
5 changed files with 138 additions and 71 deletions
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45
spa/plugins/bluez5/a2dp-sink.c
View file

@ -308,7 +308,27 @@ static int impl_node_set_io(void *object, uint32_t id, void *data, size_t size)
return 0;
}
static void emit_node_props_changed(struct impl *this);
static void emit_node_info(struct impl *this, bool full);
static int apply_props(struct impl *this, const struct spa_pod *param)
{
struct props new_props = this->props;
int changed = 0;
if (param == NULL) {
reset_props(&new_props);
} else {
spa_pod_parse_object(param,
SPA_TYPE_OBJECT_Props, NULL,
SPA_PROP_minLatency, SPA_POD_OPT_Int(&new_props.min_latency),
SPA_PROP_maxLatency, SPA_POD_OPT_Int(&new_props.max_latency),
SPA_PROP_latencyOffsetNsec, SPA_POD_OPT_Long(&new_props.latency_offset));
}
changed = (memcmp(&new_props, &this->props, sizeof(struct props)) != 0);
this->props = new_props;
return changed;
}
static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
const struct spa_pod *param)
@ -320,19 +340,11 @@ static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
switch (id) {
case SPA_PARAM_Props:
{
struct props *p = &this->props;
if (param == NULL) {
reset_props(p);
emit_node_props_changed(this);
return 0;
if (apply_props(this, param) > 0) {
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
this->params[1].flags ^= SPA_PARAM_INFO_SERIAL;
emit_node_info(this, false);
}
if (spa_pod_parse_object(param,
SPA_TYPE_OBJECT_Props, NULL,
SPA_PROP_minLatency, SPA_POD_OPT_Int(&p->min_latency),
SPA_PROP_maxLatency, SPA_POD_OPT_Int(&p->max_latency),
SPA_PROP_latencyOffsetNsec, SPA_POD_OPT_Long(&p->latency_offset)) > 0)
emit_node_props_changed(this);
break;
}
default:
@ -869,13 +881,6 @@ static void emit_port_info(struct impl *this, struct port *port, bool full)
}
}
static void emit_node_props_changed(struct impl *this)
{
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
this->params[1].flags ^= SPA_PARAM_INFO_SERIAL;
emit_node_info(this, false);
}
static int
impl_node_add_listener(void *object,
struct spa_hook *listener,