265 lines
7.2 KiB
C
265 lines
7.2 KiB
C
/* PipeWire */
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/* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans <wim.taymans@gmail.com> */
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/* SPDX-License-Identifier: MIT */
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <getopt.h>
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#include <limits.h>
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#include <math.h>
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#include <locale.h>
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#include <spa/utils/result.h>
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#include <spa/pod/builder.h>
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#include <spa/param/audio/format-utils.h>
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#include <spa/param/audio/raw.h>
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#include <spa/utils/json.h>
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#include <pipewire/pipewire.h>
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#include <pipewire/impl.h>
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#define DEFAULT_RATE 48000
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#define DEFAULT_CHANNELS 2
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#define DEFAULT_CHANNEL_MAP "[ FL, FR ]"
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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_impl_module *module;
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struct spa_hook module_listener;
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const char *opt_node_name;
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const char *opt_group_name;
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const char *opt_channel_map;
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uint32_t channels;
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uint32_t latency;
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float delay;
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struct pw_properties *capture_props;
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struct pw_properties *playback_props;
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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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static void module_destroy(void *data)
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{
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struct data *d = data;
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spa_hook_remove(&d->module_listener);
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d->module = NULL;
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pw_main_loop_quit(d->loop);
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}
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static const struct pw_impl_module_events module_events = {
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PW_VERSION_IMPL_MODULE_EVENTS,
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.destroy = module_destroy
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};
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static void show_help(struct data *data, const char *name, bool error)
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{
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fprintf(error ? stderr : stdout, "%s [options]\n"
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" -h, --help Show this help\n"
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" --version Show version\n"
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" -r, --remote Remote daemon name\n"
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" -n, --name Node name (default '%s')\n"
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" -g, --group Node group (default '%s')\n"
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" -c, --channels Number of channels (default %d)\n"
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" -m, --channel-map Channel map (default '%s')\n"
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" -l, --latency Desired latency in ms\n"
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" -d, --delay Desired delay in float s\n"
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" -C --capture Capture source to connect to (name or serial)\n"
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" --capture-props Capture stream properties\n"
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" -P --playback Playback sink to connect to (name or serial)\n"
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" --playback-props Playback stream properties\n",
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name,
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data->opt_node_name,
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data->opt_group_name,
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data->channels,
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data->opt_channel_map);
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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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const char *opt_remote = NULL;
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char cname[256], value[256];
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char *args;
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size_t size;
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FILE *f;
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static const struct option long_options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, 'V' },
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{ "remote", required_argument, NULL, 'r' },
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{ "group", required_argument, NULL, 'g' },
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{ "name", required_argument, NULL, 'n' },
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{ "channels", required_argument, NULL, 'c' },
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{ "latency", required_argument, NULL, 'l' },
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{ "delay", required_argument, NULL, 'd' },
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{ "capture", required_argument, NULL, 'C' },
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{ "playback", required_argument, NULL, 'P' },
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{ "capture-props", required_argument, NULL, 'i' },
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{ "playback-props", required_argument, NULL, 'o' },
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{ NULL, 0, NULL, 0}
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};
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int c, res = -1;
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setlocale(LC_ALL, "");
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pw_init(&argc, &argv);
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data.channels = DEFAULT_CHANNELS;
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data.opt_channel_map = DEFAULT_CHANNEL_MAP;
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data.opt_group_name = pw_get_client_name();
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if (snprintf(cname, sizeof(cname), "%s-%zd", argv[0], (size_t) getpid()) > 0)
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data.opt_group_name = cname;
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data.opt_node_name = data.opt_group_name;
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data.capture_props = pw_properties_new(NULL, NULL);
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data.playback_props = pw_properties_new(NULL, NULL);
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if (data.capture_props == NULL || data.playback_props == NULL) {
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fprintf(stderr, "can't create properties: %m\n");
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goto exit;
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}
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while ((c = getopt_long(argc, argv, "hVr:n:g:c:m:l:d:C:P:i:o:", long_options, NULL)) != -1) {
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switch (c) {
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case 'h':
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show_help(&data, argv[0], false);
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return 0;
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case 'V':
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printf("%s\n"
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"Compiled with libpipewire %s\n"
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"Linked with libpipewire %s\n",
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argv[0],
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pw_get_headers_version(),
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pw_get_library_version());
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return 0;
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case 'r':
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opt_remote = optarg;
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break;
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case 'n':
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data.opt_node_name = optarg;
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break;
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case 'g':
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data.opt_group_name = optarg;
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break;
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case 'c':
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data.channels = atoi(optarg);
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break;
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case 'm':
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data.opt_channel_map = optarg;
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break;
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case 'l':
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data.latency = atoi(optarg) * DEFAULT_RATE / SPA_MSEC_PER_SEC;
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break;
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case 'd':
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data.delay = atof(optarg);
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break;
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case 'C':
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pw_properties_set(data.capture_props, PW_KEY_TARGET_OBJECT, optarg);
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break;
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case 'P':
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pw_properties_set(data.playback_props, PW_KEY_TARGET_OBJECT, optarg);
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break;
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case 'i':
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pw_properties_update_string(data.capture_props, optarg, strlen(optarg));
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break;
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case 'o':
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pw_properties_update_string(data.playback_props, optarg, strlen(optarg));
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break;
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default:
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show_help(&data, argv[0], true);
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return -1;
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}
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}
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data.loop = pw_main_loop_new(NULL);
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if (data.loop == NULL) {
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fprintf(stderr, "can't create main loop: %m\n");
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goto exit;
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}
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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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if (data.context == NULL) {
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fprintf(stderr, "can't create context: %m\n");
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goto exit;
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}
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if ((f = open_memstream(&args, &size)) == NULL) {
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fprintf(stderr, "can't open memstream: %m\n");
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goto exit;
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}
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fprintf(f, "{");
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if (opt_remote != NULL)
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fprintf(f, " remote.name = \"%s\"", opt_remote);
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if (data.latency != 0)
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fprintf(f, " node.latency = %u/%u", data.latency, DEFAULT_RATE);
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if (data.delay != 0.0f)
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fprintf(f, " target.delay.sec = %s",
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spa_json_format_float(value, sizeof(value), data.delay));
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if (data.channels != 0)
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fprintf(f, " audio.channels = %u", data.channels);
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if (data.opt_channel_map != NULL)
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fprintf(f, " audio.position = %s", data.opt_channel_map);
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if (data.opt_node_name != NULL)
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fprintf(f, " node.name = %s", data.opt_node_name);
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if (data.opt_group_name != NULL) {
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pw_properties_set(data.capture_props, PW_KEY_NODE_GROUP, data.opt_group_name);
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pw_properties_set(data.playback_props, PW_KEY_NODE_GROUP, data.opt_group_name);
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}
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fprintf(f, " capture.props = {");
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pw_properties_serialize_dict(f, &data.capture_props->dict, 0);
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fprintf(f, " } playback.props = {");
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pw_properties_serialize_dict(f, &data.playback_props->dict, 0);
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fprintf(f, " } }");
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fclose(f);
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pw_log_info("loading module with %s", args);
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data.module = pw_context_load_module(data.context,
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"libpipewire-module-loopback", args,
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NULL);
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free(args);
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if (data.module == NULL) {
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fprintf(stderr, "can't load module: %m\n");
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goto exit;
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}
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pw_impl_module_add_listener(data.module,
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&data.module_listener, &module_events, &data);
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pw_main_loop_run(data.loop);
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res = 0;
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exit:
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if (data.module)
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pw_impl_module_destroy(data.module);
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if (data.context)
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pw_context_destroy(data.context);
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if (data.loop)
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pw_main_loop_destroy(data.loop);
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pw_properties_free(data.capture_props);
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pw_properties_free(data.playback_props);
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pw_deinit();
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return res;
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}
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