gstreamer/sys/va/gstvadevice.c
He Junyan e0915ce982 libs: va: Move the VA common logic as a lib.
The VA acceleration now has more usages in linux-like platforms,
such as the MSDK. The different plugins based on the VA acceleration
need to share some common logic and types. We now move the display
related functions and types into a common va lib.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2196>
2021-05-18 12:15:30 +02:00

104 lines
2.9 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"
#include <gudev/gudev.h>
#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);
}
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;
}
void
gst_va_device_list_free (GList * devices)
{
g_list_free_full (devices, (GDestroyNotify) gst_mini_object_unref);
}