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filter-chain: add max builtin plugin

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add max which takes two inputs and output the max value of them. it can
e.g. be used to create the same sidechain input to two mono limiters.
This commit is contained in:
Torkel Niklasson 2024-12-04 12:01:05 +01:00
parent a71cd05401
commit bfb5ae18d1
2 changed files with 51 additions and 0 deletions
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45
spa/plugins/filter-graph/builtin_plugin.c
View file

@ -2081,6 +2081,49 @@ static const struct spa_fga_descriptor param_eq_desc = {
.cleanup = free,
};
/** max */
static void max_run(void * Instance, unsigned long SampleCount)
{
struct builtin *impl = Instance;
float *out = impl->port[0], *in1 = impl->port[1], *in2 = impl->port[2];
if (out == NULL)
return;
unsigned long n;
for (n = 0; n < SampleCount; n++)
out[n] = SPA_MAX(in1[n], in2[n]);
}
static struct spa_fga_port max_ports[] = {
{ .index = 0,
.name = "Out",
.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
},
{ .index = 1,
.name = "In 1",
.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
},
{ .index = 2,
.name = "In 2",
.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
}
};
static const struct spa_fga_descriptor max_desc = {
.name = "max",
.flags = SPA_FGA_DESCRIPTOR_SUPPORTS_NULL_DATA,
.n_port = SPA_N_ELEMENTS(max_ports),
.ports = max_ports,
.instantiate = builtin_instantiate,
.connect_port = builtin_connect_port,
.run = max_run,
.cleanup = builtin_cleanup,
};
static const struct spa_fga_descriptor * builtin_descriptor(unsigned long Index)
{
switch(Index) {
@ -2128,6 +2171,8 @@ static const struct spa_fga_descriptor * builtin_descriptor(unsigned long Index)
return &sine_desc;
case 21:
return &param_eq_desc;
case 22:
return &max_desc;
}
return NULL;
}