gstreamer/subprojects/gst-plugins-bad/sys/va/gstvadevice.c
Víctor Manuel Jáquez Leal 2e6cd5c2e4 va: Make libgudev dependency optional.
libgudev is a problematic dependency, particularly in sandboxed
environments, such as flatpak.

This patch implements a way to get the available VA devices using
brute-forced traverse of /dev/drm/renderD* directory. Thus usable in
those sandboxed environments.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1027>
2021-10-04 10:19:36 +00:00

132 lines
3.5 KiB
C

/* GStreamer
* Copyright (C) 2020 Igalia, S.L.
* Author: Víctor Jáquez <vjaquez@igalia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvadevice.h"
#if HAVE_GUDEV
#include <gudev/gudev.h>
#endif
#define GST_CAT_DEFAULT gstva_debug
GST_DEBUG_CATEGORY_EXTERN (gstva_debug);
GST_DEFINE_MINI_OBJECT_TYPE (GstVaDevice, gst_va_device);
static void
gst_va_device_free (GstVaDevice * device)
{
gst_clear_object (&device->display);
g_free (device->render_device_path);
g_free (device);
}
static GstVaDevice *
gst_va_device_new (GstVaDisplay * display, const gchar * render_device_path)
{
GstVaDevice *device = g_new0 (GstVaDevice, 1);
gst_mini_object_init (GST_MINI_OBJECT_CAST (device), 0, GST_TYPE_VA_DEVICE,
NULL, NULL, (GstMiniObjectFreeFunction) gst_va_device_free);
/* take ownership */
device->display = display;
device->render_device_path = g_strdup (render_device_path);
return device;
}
static gint
compare_device_path (gconstpointer a, gconstpointer b, gpointer user_data)
{
const GstVaDevice *pa = a, *pb = b;
return strcmp (pa->render_device_path, pb->render_device_path);
}
#if HAVE_GUDEV
GList *
gst_va_device_find_devices (void)
{
GUdevClient *client;
GList *udev_devices, *dev;
GQueue devices = G_QUEUE_INIT;
client = g_udev_client_new (NULL);
udev_devices = g_udev_client_query_by_subsystem (client, "drm");
for (dev = udev_devices; dev; dev = g_list_next (dev)) {
GstVaDisplay *dpy;
GUdevDevice *udev = (GUdevDevice *) dev->data;
const gchar *path = g_udev_device_get_device_file (udev);
const gchar *name = g_udev_device_get_name (udev);
if (!path || !g_str_has_prefix (name, "renderD")) {
GST_LOG ("Ignoring %s in %s", name, path);
continue;
}
if (!(dpy = gst_va_display_drm_new_from_path (path)))
continue;
GST_INFO ("Found VA-API device: %s", path);
g_queue_push_head (&devices, gst_va_device_new (dpy, path));
}
g_queue_sort (&devices, compare_device_path, NULL);
g_list_free_full (udev_devices, g_object_unref);
g_object_unref (client);
return devices.head;
}
#else
GList *
gst_va_device_find_devices (void)
{
GstVaDisplay *dpy;
GQueue devices = G_QUEUE_INIT;
gchar path[64];
guint i;
for (i = 0; i < 8; i++) {
g_snprintf (path, sizeof (path), "/dev/dri/renderD%d", 128 + i);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
continue;
if (!(dpy = gst_va_display_drm_new_from_path (path)))
continue;
GST_INFO ("Found VA-API device: %s", path);
g_queue_push_head (&devices, gst_va_device_new (dpy, path));
}
g_queue_sort (&devices, compare_device_path, NULL);
return devices.head;
}
#endif
void
gst_va_device_list_free (GList * devices)
{
g_list_free_full (devices, (GDestroyNotify) gst_mini_object_unref);
}