164 lines
3.6 KiB
C
164 lines
3.6 KiB
C
/* PipeWire */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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/*
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[title]
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Exporting and loading a SPA node, using \ref api_pw_core.
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[title]
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*/
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#include <stdio.h>
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#include <sys/mman.h>
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#include <signal.h>
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#include <spa/utils/result.h>
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#include <spa/param/video/format-utils.h>
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#include <spa/param/props.h>
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#include <pipewire/impl.h>
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struct data {
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struct pw_main_loop *loop;
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struct pw_context *context;
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struct pw_core *core;
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struct spa_hook core_listener;
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struct spa_node *node;
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const char *library;
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const char *factory;
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const char *path;
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struct pw_proxy *proxy;
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struct spa_hook proxy_listener;
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uint32_t id;
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};
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static void proxy_event_bound_props(void *_data, uint32_t global_id, const struct spa_dict *props)
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{
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struct data *data = _data;
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if (data->id != global_id) {
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printf("node id: %u\n", global_id);
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data->id = global_id;
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}
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}
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static const struct pw_proxy_events proxy_events = {
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PW_VERSION_PROXY_EVENTS,
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.bound_props = proxy_event_bound_props,
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};
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static int make_node(struct data *data)
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{
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struct pw_properties *props;
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struct spa_handle *hndl;
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void *iface;
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int res;
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props = pw_properties_new(SPA_KEY_LIBRARY_NAME, data->library,
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SPA_KEY_FACTORY_NAME, data->factory,
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NULL);
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hndl = pw_context_load_spa_handle(data->context, data->factory, &props->dict);
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if (hndl == NULL)
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return -errno;
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if ((res = spa_handle_get_interface(hndl, SPA_TYPE_INTERFACE_Node, &iface)) < 0)
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return res;
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data->node = iface;
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if (data->path) {
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pw_properties_set(props, PW_KEY_NODE_AUTOCONNECT, "true");
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pw_properties_set(props, PW_KEY_TARGET_OBJECT, data->path);
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}
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data->proxy = pw_core_export(data->core,
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SPA_TYPE_INTERFACE_Node, &props->dict,
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data->node, 0);
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pw_properties_free(props);
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if (data->proxy == NULL)
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return -errno;
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pw_proxy_add_listener(data->proxy,
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&data->proxy_listener, &proxy_events, data);
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return 0;
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}
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static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
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{
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struct data *d = data;
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pw_log_error("error id:%u seq:%d res:%d (%s): %s",
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id, seq, res, spa_strerror(res), message);
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if (id == PW_ID_CORE)
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pw_main_loop_quit(d->loop);
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}
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static const struct pw_core_events core_events = {
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PW_VERSION_CORE_EVENTS,
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.error = on_core_error,
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};
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static void do_quit(void *data, int signal_number)
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{
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struct data *d = data;
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pw_main_loop_quit(d->loop);
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}
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int main(int argc, char *argv[])
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{
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struct data data = { 0, };
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struct pw_loop *l;
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pw_init(&argc, &argv);
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if (argc < 3) {
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fprintf(stderr, "usage: %s <library> <factory> [path]\n\n"
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"\texample: %s v4l2/libspa-v4l2 api.v4l2.source\n\n",
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argv[0], argv[0]);
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return -1;
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}
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data.loop = pw_main_loop_new(NULL);
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l = pw_main_loop_get_loop(data.loop);
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pw_loop_add_signal(l, SIGINT, do_quit, &data);
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pw_loop_add_signal(l, SIGTERM, do_quit, &data);
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data.context = pw_context_new(l, NULL, 0);
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data.library = argv[1];
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data.factory = argv[2];
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if (argc > 3)
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data.path = argv[3];
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pw_context_load_module(data.context, "libpipewire-module-spa-node-factory", NULL, NULL);
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data.core = pw_context_connect(data.context, NULL, 0);
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if (data.core == NULL) {
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printf("can't connect: %m\n");
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return -1;
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}
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pw_core_add_listener(data.core,
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&data.core_listener,
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&core_events, &data);
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if (make_node(&data) < 0) {
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pw_log_error("can't make node");
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return -1;
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}
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pw_main_loop_run(data.loop);
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pw_proxy_destroy(data.proxy);
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pw_core_disconnect(data.core);
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pw_context_destroy(data.context);
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pw_main_loop_destroy(data.loop);
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return 0;
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}
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