PipeWire  0.3.71
export-spa-device.c

doc} export-spa-device.c title
doc} export-spa-device.c doc

/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2019 Wim Taymans */
/* SPDX-License-Identifier: MIT */
/*
[title]
Exporting and loading a SPA device, using \ref api_pw_core.
[title]
*/
#include <stdio.h>
#include <sys/mman.h>
#include <signal.h>
#include <spa/param/video/format-utils.h>
#include <pipewire/impl.h>
struct data {
struct pw_main_loop *loop;
struct pw_context *context;
struct pw_core *core;
struct spa_hook core_listener;
struct pw_impl_device *device;
const char *library;
const char *factory;
const char *path;
};
static int make_device(struct data *data)
{
struct pw_impl_factory *factory;
struct pw_properties *props;
factory = pw_context_find_factory(data->context, "spa-device-factory");
if (factory == NULL)
return -1;
props = pw_properties_new(SPA_KEY_LIBRARY_NAME, data->library,
SPA_KEY_FACTORY_NAME, data->factory, NULL);
data->device = pw_impl_factory_create_object(factory,
NULL,
props, SPA_ID_INVALID);
return 0;
}
static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
{
struct data *d = data;
pw_log_error("error id:%u seq:%d res:%d (%s): %s",
id, seq, res, spa_strerror(res), message);
if (id == PW_ID_CORE)
}
static const struct pw_core_events core_events = {
.error = on_core_error,
};
static void do_quit(void *data, int signal_number)
{
struct data *d = data;
}
int main(int argc, char *argv[])
{
struct data data = { 0, };
struct pw_loop *l;
pw_init(&argc, &argv);
if (argc < 3) {
fprintf(stderr, "usage: %s <library> <factory>\n\n"
"\texample: %s v4l2/libspa-v4l2 api.v4l2.device\n\n",
argv[0], argv[0]);
return -1;
}
data.loop = pw_main_loop_new(NULL);
l = pw_main_loop_get_loop(data.loop);
pw_loop_add_signal(l, SIGINT, do_quit, &data);
pw_loop_add_signal(l, SIGTERM, do_quit, &data);
data.context = pw_context_new(l, NULL, 0);
data.library = argv[1];
data.factory = argv[2];
pw_context_load_module(data.context, "libpipewire-module-spa-device-factory", NULL, NULL);
data.core = pw_context_connect(data.context, NULL, 0);
if (data.core == NULL) {
pw_log_error("can't connect %m");
return -1;
}
pw_core_add_listener(data.core, &data.core_listener, &core_events, &data);
if (make_device(&data) < 0) {
pw_log_error("can't make device");
return -1;
}
pw_main_loop_run(data.loop);
pw_context_destroy(data.context);
return 0;
}