mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2026-02-21 01:40:34 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Port: Add tag param

Browse source 
The tag param has a list of arbitrary key/value pairs. Like the Latency
param, it travels up and downstream. Mixers will append the info
dictionaries or do some more fancy merging.

The purpose is to transport arbirary metadata, out-of-band, through the
graph and it's used for stream metadata and other stream properties.
This commit is contained in:
Wim Taymans 2023-08-24 16:41:21 +02:00
parent 6bf42e9bcd
commit 41dcac0ecd
20 changed files with 566 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/examples/video-src.c
View file

@ -14,6 +14,8 @@
#include <math.h>
#include <spa/param/video/format-utils.h>
#include <spa/param/tag-utils.h>
#include <spa/debug/pod.h>
#include <pipewire/pipewire.h>
@ -212,6 +214,10 @@ on_stream_param_changed(void *_data, uint32_t id, const struct spa_pod *param)
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(params_buffer, sizeof(params_buffer));
const struct spa_pod *params[5];
if (param != NULL && id == SPA_PARAM_Tag) {
spa_debug_pod(0, NULL, param);
return;
}
if (param == NULL || id != SPA_PARAM_Format)
return;
@ -276,7 +282,7 @@ static void do_quit(void *userdata, int signal_number)
int main(int argc, char *argv[])
{
struct data data = { 0, };
const struct spa_pod *params[1];
const struct spa_pod *params[2];
uint8_t buffer[1024];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
@ -314,6 +320,16 @@ int main(int argc, char *argv[])
&SPA_RECTANGLE(4096, 4096)),
SPA_FORMAT_VIDEO_framerate, SPA_POD_Fraction(&SPA_FRACTION(25, 1)));
{
struct spa_pod_frame f;
struct spa_dict_item items[1];
/* send a tag, output tags travel downstream */
spa_tag_build_start(&b, &f, SPA_PARAM_Tag, SPA_DIRECTION_OUTPUT);
items[0] = SPA_DICT_ITEM_INIT("my-tag-key", "my-special-tag-value");
spa_tag_build_add_dict(&b, &SPA_DICT_INIT(items, 1));
params[1] = spa_tag_build_end(&b, &f);
}
pw_stream_add_listener(data.stream,
&data.stream_listener,
&stream_events,
@ -324,7 +340,7 @@ int main(int argc, char *argv[])
PW_ID_ANY,
PW_STREAM_FLAG_DRIVER |
PW_STREAM_FLAG_MAP_BUFFERS,
params, 1);
params, 2);
pw_main_loop_run(data.loop);