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media-session: rework linking nodes

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Rework how nodes are linked. score each port pair and link the
highest score taking into account the type, direction, channels,
and number of linked ports.
This commit is contained in:
Wim Taymans 2020-07-22 15:05:45 +02:00
parent 5f9a8a82ab
commit 03c2185efe
2 changed files with 85 additions and 38 deletions
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81
src/examples/media-session/media-session.c
View file

@ -1496,6 +1496,52 @@ static const struct pw_proxy_events proxy_link_events = {
.destroy = proxy_link_destroy
};
static int score_ports(struct sm_port *out, struct sm_port *in)
{
int score = 0;
if (in->direction != PW_DIRECTION_INPUT || out->direction != PW_DIRECTION_OUTPUT)
return 0;
if (out->type != SM_PORT_TYPE_UNKNOWN && in->type != SM_PORT_TYPE_UNKNOWN &&
in->type != out->type)
return 0;
if (!in->visited)
score += 5;
if (out->channel == in->channel)
score += 100;
else if ((out->channel == SPA_AUDIO_CHANNEL_SL && in->channel == SPA_AUDIO_CHANNEL_RL) ||
(out->channel == SPA_AUDIO_CHANNEL_RL && in->channel == SPA_AUDIO_CHANNEL_SL) ||
(out->channel == SPA_AUDIO_CHANNEL_SR && in->channel == SPA_AUDIO_CHANNEL_RR) ||
(out->channel == SPA_AUDIO_CHANNEL_RR && in->channel == SPA_AUDIO_CHANNEL_SR))
score += 50;
else if ((out->channel == SPA_AUDIO_CHANNEL_FC && in->channel == SPA_AUDIO_CHANNEL_MONO) ||
(out->channel == SPA_AUDIO_CHANNEL_MONO && in->channel == SPA_AUDIO_CHANNEL_FC))
score += 40;
else if (in->channel == SPA_AUDIO_CHANNEL_UNKNOWN)
score += 30;
else if (in->channel == SPA_AUDIO_CHANNEL_MONO)
score += 20;
return score;
}
static struct sm_port *find_input_port(struct impl *impl, struct sm_node *outnode,
struct sm_port *outport, struct sm_node *innode)
{
struct sm_port *inport, *best_port = NULL;
int score, best_score = 0;
spa_list_for_each(inport, &innode->port_list, link) {
score = score_ports(outport, inport);
if (score > best_score) {
best_score = score;
best_port = inport;
}
}
return best_port;
}
static int link_nodes(struct impl *impl, struct endpoint_link *link,
struct sm_node *outnode, struct sm_node *innode)
{
@ -1508,20 +1554,28 @@ static int link_nodes(struct impl *impl, struct endpoint_link *link,
pw_properties_setf(props, PW_KEY_LINK_OUTPUT_NODE, "%d", outnode->obj.id);
pw_properties_setf(props, PW_KEY_LINK_INPUT_NODE, "%d", innode->obj.id);
for (outport = spa_list_first(&outnode->port_list, struct sm_port, link),
inport = spa_list_first(&innode->port_list, struct sm_port, link);
!spa_list_is_end(outport, &outnode->port_list, link) &&
!spa_list_is_end(inport, &innode->port_list, link);) {
spa_list_for_each(inport, &innode->port_list, link)
inport->visited = false;
spa_list_for_each(outport, &outnode->port_list, link) {
struct link *l;
struct pw_proxy *p;
if (outport->direction != PW_DIRECTION_OUTPUT)
continue;
inport = find_input_port(impl, outnode, outport, innode);
if (inport == NULL) {
pw_log_debug(NAME" %p: port %d:%d can't be linked", impl,
outport->direction, outport->obj.id);
continue;
}
inport->visited = true;
pw_log_debug(NAME" %p: port %d:%d -> %d:%d", impl,
outport->direction, outport->obj.id,
inport->direction, inport->obj.id);
if (outport->direction == PW_DIRECTION_OUTPUT &&
inport->direction == PW_DIRECTION_INPUT) {
struct link *l;
struct pw_proxy *p;
pw_properties_setf(props, PW_KEY_LINK_OUTPUT_PORT, "%d", outport->obj.id);
pw_properties_setf(props, PW_KEY_LINK_INPUT_PORT, "%d", inport->obj.id);
@ -1547,15 +1601,6 @@ static int link_nodes(struct impl *impl, struct endpoint_link *link,
} else {
spa_list_append(&impl->link_list, &l->link);
}
outport = spa_list_next(outport, link);
inport = spa_list_next(inport, link);
} else {
if (outport->direction != PW_DIRECTION_OUTPUT)
outport = spa_list_next(outport, link);
if (inport->direction != PW_DIRECTION_INPUT)
inport = spa_list_next(inport, link);
}
}
pw_properties_free(props);

2
src/examples/media-session/media-session.h
View file

@ -163,6 +163,8 @@ struct sm_port {
#define SM_PORT_CHANGE_MASK_INFO (SM_OBJECT_CHANGE_MASK_LAST<<0)
struct pw_port_info *info;
unsigned int visited:1;
};
struct sm_session {