mirror of
https://gitlab.freedesktop.org/pipewire/pipewire
synced 2024-09-20 00:11:31 +00:00
7697ed0757
This change is only done in source files for now, header files will be done separately.
230 lines
5.6 KiB
C
230 lines
5.6 KiB
C
/* Simple Plugin API
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <poll.h>
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#include <spa/utils/string.h>
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#include <spa/support/log-impl.h>
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#include <spa/support/loop.h>
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#include <spa/support/plugin.h>
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#include <spa/monitor/device.h>
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#include <spa/debug/dict.h>
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#include <spa/debug/pod.h>
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static SPA_LOG_IMPL(default_log);
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struct data {
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struct spa_log *log;
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struct spa_loop main_loop;
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struct spa_support support[3];
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uint32_t n_support;
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unsigned int n_sources;
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struct spa_source sources[16];
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bool rebuild_fds;
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struct pollfd fds[16];
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unsigned int n_fds;
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};
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static void inspect_info(struct data *data, const struct spa_device_object_info *info)
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{
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spa_debug_dict(0, info->props);
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}
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static void on_device_info(void *_data, const struct spa_device_info *info)
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{
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spa_debug_dict(0, info->props);
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}
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static void on_device_object_info(void *_data, uint32_t id, const struct spa_device_object_info *info)
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{
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struct data *data = _data;
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if (info == NULL) {
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fprintf(stderr, "removed: %u\n", id);
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}
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else {
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fprintf(stderr, "added/changed: %u\n", id);
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inspect_info(data, info);
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}
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}
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static int do_add_source(void *object, struct spa_source *source)
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{
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struct data *data = object;
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data->sources[data->n_sources] = *source;
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data->n_sources++;
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data->rebuild_fds = true;
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return 0;
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}
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static const struct spa_loop_methods impl_loop = {
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SPA_VERSION_LOOP_METHODS,
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.add_source = do_add_source,
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};
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static const struct spa_device_events impl_device_events = {
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SPA_VERSION_DEVICE_EVENTS,
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.info = on_device_info,
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.object_info = on_device_object_info,
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};
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static void handle_device(struct data *data, struct spa_device *device)
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{
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struct spa_hook listener;
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spa_zero(listener);
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spa_device_add_listener(device, &listener, &impl_device_events, data);
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while (true) {
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int r;
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uint32_t i;
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/* rebuild */
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if (data->rebuild_fds) {
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for (i = 0; i < data->n_sources; i++) {
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struct spa_source *p = &data->sources[i];
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data->fds[i].fd = p->fd;
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data->fds[i].events = p->mask;
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}
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data->n_fds = data->n_sources;
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data->rebuild_fds = false;
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}
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r = poll((struct pollfd *) data->fds, data->n_fds, -1);
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if (r < 0) {
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if (errno == EINTR)
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continue;
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break;
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}
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if (r == 0) {
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fprintf(stderr, "device %p: select timeout", device);
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break;
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}
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/* after */
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for (i = 0; i < data->n_sources; i++) {
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struct spa_source *p = &data->sources[i];
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p->func(p);
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}
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}
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spa_hook_remove(&listener);
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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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int res;
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void *handle;
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spa_handle_factory_enum_func_t enum_func;
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uint32_t fidx;
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data.log = &default_log.log;
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data.main_loop.iface = SPA_INTERFACE_INIT(
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SPA_TYPE_INTERFACE_Loop,
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SPA_VERSION_LOOP,
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&impl_loop, &data);
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data.support[0] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Log, data.log);
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data.support[1] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Loop, &data.main_loop);
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data.n_support = 2;
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if (argc < 2) {
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printf("usage: %s <plugin.so>\n", argv[0]);
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return -1;
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}
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if ((handle = dlopen(argv[1], RTLD_NOW)) == NULL) {
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printf("can't load %s\n", argv[1]);
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return -1;
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}
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if ((enum_func = dlsym(handle, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
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printf("can't find function\n");
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return -1;
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}
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for (fidx = 0;;) {
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const struct spa_handle_factory *factory;
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uint32_t iidx;
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if ((res = enum_func(&factory, &fidx)) <= 0) {
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if (res != 0)
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printf("can't enumerate factories: %d\n", res);
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break;
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}
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if (factory->version < 1) {
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printf("factories version %d < %d not supported\n",
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factory->version, 1);
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continue;
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}
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for (iidx = 0;;) {
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const struct spa_interface_info *info;
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if ((res =
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spa_handle_factory_enum_interface_info(factory, &info, &iidx)) <= 0) {
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if (res != 0)
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printf("can't enumerate interfaces: %d\n", res);
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break;
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}
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if (spa_streq(info->type, SPA_TYPE_INTERFACE_Device)) {
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struct spa_handle *handle;
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void *interface;
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handle = calloc(1, spa_handle_factory_get_size(factory, NULL));
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if ((res =
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spa_handle_factory_init(factory, handle, NULL, data.support,
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data.n_support)) < 0) {
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printf("can't make factory instance: %s\n", strerror(res));
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continue;
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}
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if ((res =
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spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Device,
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&interface)) < 0) {
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printf("can't get interface: %s\n", strerror(res));
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continue;
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}
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handle_device(&data, interface);
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}
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}
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}
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return 0;
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}
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