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authorGravatar Alessandro Ghedini <alessandro@ghedini.me>2014-10-16 11:48:18 +0200
committerGravatar Alessandro Ghedini <alessandro@ghedini.me>2014-10-17 20:46:31 +0200
commit13039414f5fd00a6b20d2bbad9fd497c6e579d34 (patch)
treefe47451fd6bf3391a5bd33284e157ba403c4a12e /input
parentc01151e0bf09bfd6db1faeaffcebd3674ac5baa2 (diff)
input: implement JSON-based IPC protocol
Diffstat (limited to 'input')
-rw-r--r--input/ipc.c723
1 files changed, 723 insertions, 0 deletions
diff --git a/input/ipc.c b/input/ipc.c
new file mode 100644
index 0000000000..7ce8aa3424
--- /dev/null
+++ b/input/ipc.c
@@ -0,0 +1,723 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with mpv. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <pthread.h>
+#include <assert.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <poll.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/un.h>
+
+#include "config.h"
+
+#include "osdep/io.h"
+
+#include "common/common.h"
+#include "common/msg.h"
+#include "input/input.h"
+#include "libmpv/client.h"
+#include "misc/bstr.h"
+#include "misc/json.h"
+#include "options/m_option.h"
+#include "options/path.h"
+#include "player/core.h"
+#include "player/client.h"
+
+struct thread_arg {
+ struct MPContext *mpctx;
+ const char *path;
+
+ pthread_t thread;
+ int death_pipe[2];
+};
+
+struct client_arg {
+ struct mp_log *log;
+ struct mpv_handle *client;
+
+ int client_fd;
+
+ char *(*encode_event)(mpv_event *event);
+ char *(*execute_command)(struct client_arg *arg, bstr msg);
+};
+
+static mpv_node *mpv_node_map_get(mpv_node *src, const char *key)
+{
+ if (src->format != MPV_FORMAT_NODE_MAP)
+ return NULL;
+
+ for (int i = 0; i < src->u.list->num; i++)
+ if (!strcmp(key, src->u.list->keys[i]))
+ return &src->u.list->values[i];
+
+ return NULL;
+}
+
+static mpv_node *mpv_node_array_get(mpv_node *src, int index)
+{
+ if (src->format != MPV_FORMAT_NODE_ARRAY)
+ return NULL;
+
+ if (src->u.list->num < (index + 1))
+ return NULL;
+
+ return &src->u.list->values[index];
+}
+
+static void mpv_node_array_add(void *ta_parent, mpv_node *src, mpv_node *val)
+{
+ if (src->format != MPV_FORMAT_NODE_ARRAY)
+ return;
+
+ if (!src->u.list)
+ src->u.list = talloc_zero(ta_parent, mpv_node_list);
+
+ MP_TARRAY_GROW(src->u.list, src->u.list->values, src->u.list->num);
+
+ static const struct m_option type = { .type = CONF_TYPE_NODE };
+ m_option_get_node(&type, ta_parent, &src->u.list->values[src->u.list->num], val);
+
+ src->u.list->num++;
+}
+
+static void mpv_node_array_add_string(void *ta_parent, mpv_node *src, const char *val)
+{
+ mpv_node val_node = {.format = MPV_FORMAT_STRING, .u.string = (char *)val};
+ mpv_node_array_add(ta_parent, src, &val_node);
+}
+
+static void mpv_node_map_add(void *ta_parent, mpv_node *src, const char *key, mpv_node *val)
+{
+ if (src->format != MPV_FORMAT_NODE_MAP)
+ return;
+
+ if (!src->u.list)
+ src->u.list = talloc_zero(ta_parent, mpv_node_list);
+
+ MP_TARRAY_GROW(src->u.list, src->u.list->keys, src->u.list->num);
+ MP_TARRAY_GROW(src->u.list, src->u.list->values, src->u.list->num);
+
+ src->u.list->keys[src->u.list->num] = talloc_strdup(ta_parent, key);
+
+ static const struct m_option type = { .type = CONF_TYPE_NODE };
+ m_option_get_node(&type, ta_parent, &src->u.list->values[src->u.list->num], val);
+
+ src->u.list->num++;
+}
+
+static void mpv_node_map_add_null(void *ta_parent, mpv_node *src, const char *key)
+{
+ mpv_node val_node = {.format = MPV_FORMAT_NONE};
+ mpv_node_map_add(ta_parent, src, key, &val_node);
+}
+
+static void mpv_node_map_add_flag(void *ta_parent, mpv_node *src, const char *key, bool val)
+{
+ mpv_node val_node = {.format = MPV_FORMAT_FLAG, .u.flag = val};
+
+ mpv_node_map_add(ta_parent, src, key, &val_node);
+}
+
+static void mpv_node_map_add_int64(void *ta_parent, mpv_node *src, const char *key, int64_t val)
+{
+ mpv_node val_node = {.format = MPV_FORMAT_INT64, .u.int64 = val};
+ mpv_node_map_add(ta_parent, src, key, &val_node);
+}
+
+static void mpv_node_map_add_double(void *ta_parent, mpv_node *src, const char *key, double val)
+{
+ mpv_node val_node = {.format = MPV_FORMAT_DOUBLE, .u.double_ = val};
+ mpv_node_map_add(ta_parent, src, key, &val_node);
+}
+
+static void mpv_node_map_add_string(void *ta_parent, mpv_node *src, const char *key, const char *val)
+{
+ mpv_node val_node = {.format = MPV_FORMAT_STRING, .u.string = (char*)val};
+ mpv_node_map_add(ta_parent, src, key, &val_node);
+}
+
+static void mpv_event_to_node(void *ta_parent, mpv_event *event, mpv_node *dst)
+{
+ mpv_node_map_add_string(ta_parent, dst, "event", mpv_event_name(event->event_id));
+
+ if (event->reply_userdata)
+ mpv_node_map_add_int64(ta_parent, dst, "id", event->reply_userdata);
+
+ if (event->error < 0)
+ mpv_node_map_add_string(ta_parent, dst, "error", mpv_error_string(event->error));
+
+ switch (event->event_id) {
+ case MPV_EVENT_LOG_MESSAGE: {
+ mpv_event_log_message *msg = event->data;
+
+ mpv_node_map_add_string(ta_parent, dst, "prefix", msg->prefix);
+ mpv_node_map_add_string(ta_parent, dst, "level", msg->level);
+ mpv_node_map_add_string(ta_parent, dst, "text", msg->text);
+
+ break;
+ }
+
+ case MPV_EVENT_SCRIPT_INPUT_DISPATCH: {
+ mpv_event_script_input_dispatch *msg = event->data;
+
+ mpv_node_map_add_int64(ta_parent, dst, "arg0", msg->arg0);
+ mpv_node_map_add_string(ta_parent, dst, "type", msg->type);
+
+ break;
+ }
+
+ case MPV_EVENT_CLIENT_MESSAGE: {
+ mpv_event_client_message *msg = event->data;
+
+ mpv_node args_node = {.format = MPV_FORMAT_NODE_ARRAY, .u.list = NULL};
+ for (int n = 0; n < msg->num_args; n++)
+ mpv_node_array_add_string(ta_parent, &args_node, msg->args[n]);
+ mpv_node_map_add(ta_parent, dst, "args", &args_node);
+ break;
+ }
+
+ case MPV_EVENT_PROPERTY_CHANGE: {
+ mpv_event_property *prop = event->data;
+
+ mpv_node_map_add_string(ta_parent, dst, "name", prop->name);
+
+ switch (prop->format) {
+ case MPV_FORMAT_NODE:
+ mpv_node_map_add(ta_parent, dst, "data", prop->data);
+ break;
+ case MPV_FORMAT_DOUBLE:
+ mpv_node_map_add_double(ta_parent, dst, "data", *(double *)prop->data);
+ break;
+ case MPV_FORMAT_FLAG:
+ mpv_node_map_add_flag(ta_parent, dst, "data", *(int *)prop->data);
+ break;
+ case MPV_FORMAT_STRING:
+ mpv_node_map_add_string(ta_parent, dst, "data", *(char **)prop->data);
+ break;
+ default:
+ mpv_node_map_add_null(ta_parent, dst, "data");
+ }
+ break;
+ }
+ }
+}
+
+static char *json_encode_event(mpv_event *event)
+{
+ void *ta_parent = talloc_new(NULL);
+ mpv_node event_node = {.format = MPV_FORMAT_NODE_MAP, .u.list = NULL};
+
+ mpv_event_to_node(ta_parent, event, &event_node);
+
+ char *output = talloc_strdup(NULL, "");
+ json_write(&output, &event_node);
+ output = ta_talloc_strdup_append(output, "\n");
+
+ talloc_free(ta_parent);
+
+ return output;
+}
+
+static char *json_execute_command(struct client_arg *arg, bstr msg)
+{
+ int rc;
+ const char *cmd = NULL;
+
+ mpv_node msg_node;
+ mpv_node reply_node = {.format = MPV_FORMAT_NODE_MAP, .u.list = NULL};
+
+ void *ta_parent = talloc_new(NULL);
+
+ char *src = bstrdup0(ta_parent, msg);
+ rc = json_parse(ta_parent, &msg_node, &src, 3);
+ if (rc < 0) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (msg_node.format != MPV_FORMAT_NODE_MAP) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ mpv_node *cmd_node = mpv_node_map_get(&msg_node, "command");
+ if (!cmd_node ||
+ (cmd_node->format != MPV_FORMAT_NODE_ARRAY) ||
+ !cmd_node->u.list->num)
+ {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ mpv_node *cmd_str_node = mpv_node_array_get(cmd_node, 0);
+ if (!cmd_str_node || (cmd_str_node->format != MPV_FORMAT_STRING)) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ cmd = cmd_str_node->u.string;
+
+ if (!strcmp("client_name", cmd)) {
+ const char *client_name = mpv_client_name(arg->client);
+ mpv_node_map_add_string(ta_parent, &reply_node, "data", client_name);
+ rc = MPV_ERROR_SUCCESS;
+ } else if (!strcmp("get_time_us", cmd)) {
+ int64_t time_us = mpv_get_time_us(arg->client);
+ mpv_node_map_add_int64(ta_parent, &reply_node, "data", time_us);
+ rc = MPV_ERROR_SUCCESS;
+ } else if (!strcmp("get_property", cmd)) {
+ mpv_node result_node;
+
+ if (cmd_node->u.list->num != 2) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ rc = mpv_get_property(arg->client, cmd_node->u.list->values[1].u.string,
+ MPV_FORMAT_NODE, &result_node);
+ if (rc >= 0) {
+ mpv_node_map_add(ta_parent, &reply_node, "data", &result_node);
+ mpv_free_node_contents(&result_node);
+ }
+ } else if (!strcmp("get_property_string", cmd)) {
+ if (cmd_node->u.list->num != 2) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ char *result = mpv_get_property_string(arg->client,
+ cmd_node->u.list->values[1].u.string);
+ if (!result) {
+ mpv_node_map_add_null(ta_parent, &reply_node, "data");
+ } else {
+ mpv_node_map_add_string(ta_parent, &reply_node, "data", result);
+ mpv_free(result);
+ }
+ } else if (!strcmp("set_property", cmd)) {
+ if (cmd_node->u.list->num != 3) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ rc = mpv_set_property(arg->client, cmd_node->u.list->values[1].u.string,
+ MPV_FORMAT_NODE, &cmd_node->u.list->values[2]);
+ } else if (!strcmp("set_property_string", cmd)) {
+ if (cmd_node->u.list->num != 3) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[2].format != MPV_FORMAT_STRING) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ rc = mpv_set_property_string(arg->client,
+ cmd_node->u.list->values[1].u.string,
+ cmd_node->u.list->values[2].u.string);
+ } else if (!strcmp("observe_property", cmd)) {
+ if (cmd_node->u.list->num != 3) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[1].format != MPV_FORMAT_INT64) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[2].format != MPV_FORMAT_STRING) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ rc = mpv_observe_property(arg->client,
+ cmd_node->u.list->values[1].u.int64,
+ cmd_node->u.list->values[2].u.string,
+ MPV_FORMAT_NODE);
+ } else if (!strcmp("observe_property_string", cmd)) {
+ if (cmd_node->u.list->num != 3) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[1].format != MPV_FORMAT_INT64) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[2].format != MPV_FORMAT_STRING) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ rc = mpv_observe_property(arg->client,
+ cmd_node->u.list->values[1].u.int64,
+ cmd_node->u.list->values[2].u.string,
+ MPV_FORMAT_STRING);
+ } else if (!strcmp("unobserve_property", cmd)) {
+ if (cmd_node->u.list->num != 2) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ if (cmd_node->u.list->values[1].format != MPV_FORMAT_INT64) {
+ rc = MPV_ERROR_INVALID_PARAMETER;
+ goto error;
+ }
+
+ rc = mpv_unobserve_property(arg->client,
+ cmd_node->u.list->values[1].u.int64);
+ } else if (!strcmp("suspend", cmd)) {
+ mpv_suspend(arg->client);
+ rc = MPV_ERROR_SUCCESS;
+ } else if (!strcmp("resume", cmd)) {
+ mpv_resume(arg->client);
+ rc = MPV_ERROR_SUCCESS;
+ } else {
+ mpv_node result_node;
+
+ rc = mpv_command_node(arg->client, cmd_node, &result_node);
+ if (rc >= 0)
+ mpv_node_map_add(ta_parent, &reply_node, "data", &result_node);
+ }
+
+error:
+ mpv_node_map_add_string(ta_parent, &reply_node, "error", mpv_error_string(rc));
+
+ char *output = talloc_strdup(NULL, "");
+ json_write(&output, &reply_node);
+ output = ta_talloc_strdup_append(output, "\n");
+
+ talloc_free(ta_parent);
+
+ return output;
+}
+
+static int ipc_write(int fd, const char *buf, size_t count)
+{
+ while (count > 0) {
+ ssize_t rc = write(fd, buf, count);
+ if (rc <= 0) {
+ if (rc == 0)
+ return ECONNRESET;
+
+ if (rc == EINTR)
+ continue;
+
+ if (rc == EAGAIN)
+ return 0;
+
+ return rc;
+ }
+
+ count -= rc;
+ buf += rc;
+ }
+
+ return 0;
+}
+
+static void *client_thread(void *p)
+{
+ pthread_detach(pthread_self());
+
+ int rc;
+
+ struct client_arg *arg = p;
+
+ int pipe_fd = mpv_get_wakeup_pipe(arg->client);
+ if (pipe_fd < 0) {
+ MP_ERR(arg, "Could not get wakeup pipe\n");
+ goto done;
+ }
+
+ MP_INFO(arg, "Client connected\n");
+
+ struct pollfd fds[2] = {
+ {.events = POLLIN, .fd = pipe_fd},
+ {.events = POLLIN, .fd = arg->client_fd},
+ };
+
+ fcntl(arg->client_fd, F_SETFL, fcntl(arg->client_fd, F_GETFL, 0) | O_NONBLOCK);
+
+ bstr client_msg = { talloc_strdup(NULL, ""), 0 };
+ while (1) {
+ rc = poll(fds, 2, -1);
+ if (rc < 0) {
+ MP_ERR(arg, "Poll error\n");
+ continue;
+ }
+
+ if (fds[0].revents & POLLIN) {
+ char discard[100];
+ read(pipe_fd, discard, sizeof(discard));
+
+ while (1) {
+ mpv_event *event = mpv_wait_event(arg->client, 0);
+
+ if (event->event_id == MPV_EVENT_NONE)
+ break;
+
+ if (event->event_id == MPV_EVENT_SHUTDOWN)
+ goto done;
+
+ if (!arg->encode_event)
+ continue;
+
+ char *event_msg = arg->encode_event(event);
+ if (!event_msg) {
+ MP_ERR(arg, "Encoding error\n");
+ goto done;
+ }
+
+ rc = ipc_write(arg->client_fd, event_msg, strlen(event_msg));
+ talloc_free(event_msg);
+ if (rc < 0) {
+ MP_ERR(arg, "Write error\n");
+ goto done;
+ }
+ }
+ }
+
+ if (fds[1].revents & POLLIN) {
+ while (1) {
+ char buf[128];
+ bstr append = { buf, 0 };
+
+ ssize_t bytes = read(arg->client_fd, buf, sizeof(buf));
+ if (bytes < 0) {
+ if (errno == EAGAIN)
+ break;
+
+ MP_ERR(arg, "Read error\n");
+ goto done;
+ }
+
+ if (bytes == 0) {
+ MP_INFO(arg, "Client disconnected\n");
+ goto done;
+ }
+
+ append.len = bytes;
+
+ bstr_xappend(NULL, &client_msg, append);
+
+ while (bstrchr(client_msg, '\n') != -1) {
+ bstr rest, tmp;
+ bstr line = bstr_getline(client_msg, &rest);
+
+ if (arg->execute_command) {
+ char *reply_msg = arg->execute_command(arg, line);
+ if (!reply_msg)
+ goto command_done;
+
+ rc = ipc_write(arg->client_fd, reply_msg,
+ strlen(reply_msg));
+ talloc_free(reply_msg);
+ if (rc < 0) {
+ MP_ERR(arg, "Write error\n");
+ talloc_free(client_msg.start);
+ goto done;
+ }
+ }
+
+command_done:
+ tmp = bstrdup(NULL, rest);
+ talloc_free(client_msg.start);
+ client_msg = tmp;
+ }
+ }
+ }
+ }
+
+done:
+ close(arg->client_fd);
+ mpv_detach_destroy(arg->client);
+ talloc_free(arg);
+ return NULL;
+}
+
+static void ipc_start_client(struct MPContext *mpctx, int id, int fd)
+{
+ struct client_arg *client = talloc_ptrtype(NULL, client);
+ char *client_name = talloc_asprintf(client, "ipc-%d", id);
+ *client = (struct client_arg){
+ .client = mp_new_client(mpctx->clients, client_name),
+ .client_fd = fd,
+
+ .encode_event = json_encode_event,
+ .execute_command = json_execute_command,
+ };
+
+ client->log = mp_client_get_log(client->client);
+
+ pthread_t client_thr;
+ if (pthread_create(&client_thr, NULL, client_thread, client)) {
+ mpv_detach_destroy(client->client);
+ close(client->client_fd);
+ talloc_free(client);
+ }
+}
+
+static void *ipc_thread(void *p)
+{
+ int rc;
+
+ int ipc_fd;
+ struct sockaddr_un ipc_un;
+
+ struct thread_arg *arg = p;
+
+ MP_INFO(arg->mpctx, "Starting IPC master\n");
+
+ ipc_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (ipc_fd < 0) {
+ MP_ERR(arg->mpctx, "Could not create IPC socket\n");
+ goto done;
+ }
+
+ size_t path_len = strlen(arg->path);
+ if (path_len >= sizeof(ipc_un.sun_path) - 1) {
+ MP_ERR(arg->mpctx, "Could not create IPC socket\n");
+ goto done;
+ }
+
+ ipc_un.sun_family = AF_UNIX,
+ strncpy(ipc_un.sun_path, arg->path, sizeof(ipc_un.sun_path));
+
+ unlink(ipc_un.sun_path);
+
+ if (ipc_un.sun_path[0] == '@') {
+ ipc_un.sun_path[0] = '\0';
+ path_len--;
+ }
+
+ size_t addr_len = offsetof(struct sockaddr_un, sun_path) + 1 + path_len;
+ rc = bind(ipc_fd, (struct sockaddr *) &ipc_un, addr_len);
+ if (rc < 0) {
+ MP_ERR(arg->mpctx, "Could not bind IPC socket\n");
+ goto done;
+ }
+
+ rc = listen(ipc_fd, 10);
+ if (rc < 0) {
+ MP_ERR(arg->mpctx, "Could not listen on IPC socket\n");
+ goto done;
+ }
+
+ int client_num = 0;
+
+ struct pollfd fds[2] = {
+ {.events = POLLIN, .fd = arg->death_pipe[0]},
+ {.events = POLLIN, .fd = ipc_fd},
+ };
+
+ while (1) {
+ rc = poll(fds, 2, -1);
+ if (rc < 0) {
+ MP_ERR(arg->mpctx, "Poll error\n");
+ continue;
+ }
+
+ if (fds[0].revents & POLLIN)
+ goto done;
+
+ if (fds[1].revents & POLLIN) {
+ int client_fd = accept(ipc_fd, NULL, NULL);
+ if (client_fd < 0) {
+ MP_ERR(arg->mpctx, "Could not accept IPC client\n");
+ goto done;
+ }
+
+ ipc_start_client(arg->mpctx, client_num++, client_fd);
+ }
+ }
+
+done:
+ if (ipc_fd >= 0)
+ close(ipc_fd);
+
+ close(arg->death_pipe[0]);
+ arg->death_pipe[0] = -1;
+ close(arg->death_pipe[1]);
+ arg->death_pipe[1] = -1;
+ arg->mpctx->ipc_ctx = NULL;
+
+ talloc_free(arg);
+ return NULL;
+}
+
+void mp_init_ipc(struct MPContext *mpctx)
+{
+ if (!mpctx->opts->ipc_path || !*mpctx->opts->ipc_path)
+ return;
+
+ struct thread_arg *arg = talloc_ptrtype(NULL, arg);
+ *arg = (struct thread_arg){
+ .mpctx = mpctx,
+ .path = mp_get_user_path(arg, mpctx->global, mpctx->opts->ipc_path),
+ };
+
+ if (mp_make_wakeup_pipe(arg->death_pipe) < 0) {
+ talloc_free(arg);
+ return;
+ }
+
+ mpctx->ipc_ctx = arg;
+
+ if (pthread_create(&arg->thread, NULL, ipc_thread, arg))
+ talloc_free(arg);
+}
+
+void mp_uninit_ipc(struct MPContext *mpctx)
+{
+ struct thread_arg *arg = mpctx->ipc_ctx;
+
+ if (!arg)
+ return;
+
+ if (arg->death_pipe[1] != -1)
+ write(arg->death_pipe[1], &(char){0}, 1);
+ pthread_join(arg->thread, NULL);
+
+ mpctx->ipc_ctx = NULL;
+}