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filter-graph: add NULL data support per port

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It would be good to define NULL support per port in e.g. LV2
plugins where sidechains are usually defined optional.
This commit is contained in:
Niklas Carlsson 2025-08-06 11:52:47 +02:00
parent 97a1609b29
commit 2ac708d916
2 changed files with 14 additions and 6 deletions
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10
spa/plugins/filter-graph/audio-plugin.h
View file

@ -27,10 +27,11 @@ struct spa_fga_plugin_methods {
struct spa_fga_port {
uint32_t index;
const char *name;
#define SPA_FGA_PORT_INPUT (1ULL << 0)
#define SPA_FGA_PORT_OUTPUT (1ULL << 1)
#define SPA_FGA_PORT_CONTROL (1ULL << 2)
#define SPA_FGA_PORT_AUDIO (1ULL << 3)
#define SPA_FGA_PORT_INPUT (1ULL << 0)
#define SPA_FGA_PORT_OUTPUT (1ULL << 1)
#define SPA_FGA_PORT_CONTROL (1ULL << 2)
#define SPA_FGA_PORT_AUDIO (1ULL << 3)
#define SPA_FGA_PORT_SUPPORTS_NULL_DATA (1ULL << 4)
uint64_t flags;
#define SPA_FGA_HINT_BOOLEAN (1ULL << 0)
@ -47,6 +48,7 @@ struct spa_fga_port {
#define SPA_FGA_IS_PORT_OUTPUT(x) ((x) & SPA_FGA_PORT_OUTPUT)
#define SPA_FGA_IS_PORT_CONTROL(x) ((x) & SPA_FGA_PORT_CONTROL)
#define SPA_FGA_IS_PORT_AUDIO(x) ((x) & SPA_FGA_PORT_AUDIO)
#define SPA_FGA_SUPPORTS_NULL_DATA(x) ((x) & SPA_FGA_PORT_SUPPORTS_NULL_DATA)
struct spa_fga_descriptor {
const char *name;

10
spa/plugins/filter-graph/filter-graph.c
View file

@ -1619,6 +1619,8 @@ static int impl_activate(void *object, const struct spa_dict *props)
if ((res = port_ensure_data(link->output, i, max_samples)) < 0)
goto error;
data = link->output->audio_data[i];
} else if (SPA_FGA_SUPPORTS_NULL_DATA(d->ports[port->p].flags)) {
data = NULL;
} else {
data = sd;
}
@ -1629,9 +1631,13 @@ static int impl_activate(void *object, const struct spa_dict *props)
for (j = 0; j < desc->n_output; j++) {
port = &node->output_port[j];
if (port->audio_data[i] == NULL) {
if (SPA_FGA_SUPPORTS_NULL_DATA(d->ports[port->p].flags))
data = NULL;
else
data = dd;
spa_log_info(impl->log, "connect output port %s[%d]:%s %p",
node->name, i, d->ports[port->p].name, dd);
d->connect_port(node->hndl[i], port->p, dd);
node->name, i, d->ports[port->p].name, data);
d->connect_port(node->hndl[i], port->p, data);
}
}
for (j = 0; j < desc->n_control; j++) {