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filter-graph: add a debug node

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Add a node that logs audio or control data to the log.
This commit is contained in:
Wim Taymans 2025-05-07 10:44:57 +02:00
parent 958ae36717
commit 5bf3a0c454
2 changed files with 66 additions and 1 deletions
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55
spa/plugins/filter-graph/builtin_plugin.c
View file

@ -17,6 +17,7 @@
#include <spa/support/cpu.h>
#include <spa/support/log.h>
#include <spa/plugins/audioconvert/resample.h>
#include <spa/debug/log.h>
#include "audio-plugin.h"
@ -2453,6 +2454,58 @@ static const struct spa_fga_descriptor sqrt_desc = {
.cleanup = builtin_cleanup,
};
/* debug */
static void debug_run(void * Instance, unsigned long SampleCount)
{
struct builtin *impl = Instance;
float *in = impl->port[0], *out = impl->port[1];
float *control = impl->port[2], *notify = impl->port[3];
if (in != NULL) {
spa_debug_log_mem(impl->log, SPA_LOG_LEVEL_INFO, 0, in, SampleCount * sizeof(float));
if (out != NULL)
memcpy(out, in, SampleCount * sizeof(float));
}
if (control != NULL) {
spa_log_info(impl->log, "control: %f", control[0]);
if (notify != NULL)
notify[0] = control[0];
}
}
static struct spa_fga_port debug_ports[] = {
{ .index = 0,
.name = "In",
.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
},
{ .index = 1,
.name = "Out",
.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
},
{ .index = 2,
.name = "Control",
.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_CONTROL,
},
{ .index = 3,
.name = "Notify",
.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
},
};
static const struct spa_fga_descriptor debug_desc = {
.name = "debug",
.flags = SPA_FGA_DESCRIPTOR_SUPPORTS_NULL_DATA,
.n_ports = SPA_N_ELEMENTS(debug_ports),
.ports = debug_ports,
.instantiate = builtin_instantiate,
.connect_port = builtin_connect_port,
.run = debug_run,
.cleanup = builtin_cleanup,
};
static const struct spa_fga_descriptor * builtin_descriptor(unsigned long Index)
{
switch(Index) {
@ -2510,6 +2563,8 @@ static const struct spa_fga_descriptor * builtin_descriptor(unsigned long Index)
return &abs_desc;
case 26:
return &sqrt_desc;
case 27:
return &debug_desc;
}
return NULL;
}

12
src/modules/module-filter-chain.c
View file

@ -580,7 +580,7 @@ extern struct spa_handle_factory spa_filter_graph_factory;
* and that can be used to control the processing of the audio. Some of these ports
* contain values in LUFS, or "Loudness Units relative to Full Scale". These are
* negative values, closer to 0 is louder. You can use the lufs2gain plugin to
* convert this value to again to adjust a volume (See below).
* convert this value to a gain to adjust a volume (See below).
*
* "Momentary LUFS" contains the momentary loudness measurement with a 400ms window
* and 75% overlap. It works mostly like an R.M.S. meter.
@ -638,6 +638,16 @@ extern struct spa_handle_factory spa_filter_graph_factory;
* control value "Gain". This gain can be used as input for the builtin `linear`
* node, for example, to adust the gain.
*
* ### debug
*
* The debug plugin can be used to debug the audio and control data of other plugins.
*
* It has an "In" input port and an "Out" output data ports. The data from "In" will
* be copied to "Out" and the data will be dumped into the INFO log.
*
* There is also a "Control" input port and an "Notify" output control ports. The
* control from "Control" will be copied to "Notify" and the control value will be
* dumped into the INFO log.
*
* ## General options
*