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Implement the XDP Camera portal

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This helps the Pipewire camera driver to access cameras
in a sandboxed environment without host Pipewire socket access.
Unlike other platforms, no event is sent when the user rejects
camera access. This is because there is no mechanism to query
cameras through the portal, and we only obtain access to the
Pipewire fd if the user accepts the request. The Pipewire driver
will attempt to open the host socket instead.
This commit is contained in:
kemal
2024-08-29 10:18:28 +03:00
committed by Sam Lantinga
parent c3b415641a
commit 16f12c0d55
3 changed files with 213 additions and 1 deletions
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26
src/camera/pipewire/SDL_camera_pipewire.c
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@@ -25,6 +25,10 @@
#include "../SDL_syscamera.h"
#ifdef HAVE_DBUS_DBUS_H
#include "../../core/linux/SDL_dbus.h"
#endif
#include <spa/utils/type.h>
#include <spa/pod/builder.h>
#include <spa/pod/iter.h>
@@ -78,6 +82,9 @@ static int (*PIPEWIRE_pw_thread_loop_start)(struct pw_thread_loop *);
static struct pw_context *(*PIPEWIRE_pw_context_new)(struct pw_loop *, struct pw_properties *, size_t);
static void (*PIPEWIRE_pw_context_destroy)(struct pw_context *);
static struct pw_core *(*PIPEWIRE_pw_context_connect)(struct pw_context *, struct pw_properties *, size_t);
#ifdef SDL_USE_LIBDBUS
static struct pw_core *(*PIPEWIRE_pw_context_connect_fd)(struct pw_context *, int, struct pw_properties *, size_t);
#endif
static void (*PIPEWIRE_pw_proxy_add_object_listener)(struct pw_proxy *, struct spa_hook *, const void *, void *);
static void (*PIPEWIRE_pw_proxy_add_listener)(struct pw_proxy *, struct spa_hook *, const struct pw_proxy_events *, void *);
static void *(*PIPEWIRE_pw_proxy_get_user_data)(struct pw_proxy *);
@@ -171,6 +178,9 @@ static bool load_pipewire_syms(void)
SDL_PIPEWIRE_SYM(pw_context_new);
SDL_PIPEWIRE_SYM(pw_context_destroy);
SDL_PIPEWIRE_SYM(pw_context_connect);
#ifdef SDL_USE_LIBDBUS
SDL_PIPEWIRE_SYM(pw_context_connect_fd);
#endif
SDL_PIPEWIRE_SYM(pw_proxy_add_listener);
SDL_PIPEWIRE_SYM(pw_proxy_add_object_listener);
SDL_PIPEWIRE_SYM(pw_proxy_get_user_data);
@@ -1021,6 +1031,13 @@ static bool pipewire_server_version_at_least(int major, int minor, int patch)
static bool hotplug_loop_init(void)
{
int res;
#ifdef SDL_USE_LIBDBUS
int fd;
fd = SDL_DBus_CameraPortalRequestAccess();
if (fd == -1)
return false;
#endif
spa_list_init(&hotplug.global_list);
@@ -1035,8 +1052,15 @@ static bool hotplug_loop_init(void)
if (!hotplug.context) {
return SDL_SetError("Pipewire: Failed to create hotplug detection context (%i)", errno);
}
#ifdef SDL_USE_LIBDBUS
if (fd >= 0) {
hotplug.core = PIPEWIRE_pw_context_connect_fd(hotplug.context, fd, NULL, 0);
} else {
hotplug.core = PIPEWIRE_pw_context_connect(hotplug.context, NULL, 0);
}
#else
hotplug.core = PIPEWIRE_pw_context_connect(hotplug.context, NULL, 0);
#endif
if (!hotplug.core) {
return SDL_SetError("Pipewire: Failed to connect hotplug detection context (%i)", errno);
}