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218 lines
5.2 KiB
C
218 lines
5.2 KiB
C
/* GStreamer
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* Copyright (C) 2020 Igalia, S.L.
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* Author: Víctor Jáquez <vjaquez@igalia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstvadisplaydrm
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* @title: GstVaDisplayDrm
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* @short_description: VADisplay from a DRM device
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* @sources:
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* - gstvadisplay_drm.h
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*
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* This is a #GstVaDisplay subclass to instantiate with DRM devices.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstvadisplay_drm.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <va/va_drm.h>
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#if HAVE_LIBDRM
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#include <xf86drm.h>
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#endif
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/**
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* GstVaDisplayDrm:
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* @parent: parent #GstVaDisplay
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*
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* Since: 1.20
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*/
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struct _GstVaDisplayDrm
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{
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GstVaDisplay parent;
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/* <private> */
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gchar *path;
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gint fd;
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};
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/**
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* GstVaDisplayDrmClass:
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* @parent_class: parent #GstVaDisplayClass
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*
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* Since: 1.20
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*/
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struct _GstVaDisplayDrmClass
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{
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GstVaDisplayClass parent_class;
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};
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GST_DEBUG_CATEGORY_EXTERN (gst_va_display_debug);
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#define GST_CAT_DEFAULT gst_va_display_debug
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#define gst_va_display_drm_parent_class parent_class
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G_DEFINE_TYPE (GstVaDisplayDrm, gst_va_display_drm, GST_TYPE_VA_DISPLAY);
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enum
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{
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PROP_PATH = 1,
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N_PROPERTIES
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};
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static GParamSpec *g_properties[N_PROPERTIES];
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#define MAX_DEVICES 8
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static void
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gst_va_display_drm_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstVaDisplayDrm *self = GST_VA_DISPLAY_DRM (object);
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switch (prop_id) {
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case PROP_PATH:
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self->path = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_va_display_drm_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstVaDisplayDrm *self = GST_VA_DISPLAY_DRM (object);
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switch (prop_id) {
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case PROP_PATH:
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g_value_set_string (value, self->path);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_va_display_drm_finalize (GObject * object)
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{
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GstVaDisplayDrm *self = GST_VA_DISPLAY_DRM (object);
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g_free (self->path);
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if (self->fd > -1)
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close (self->fd);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gpointer
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gst_va_display_drm_create_va_display (GstVaDisplay * display)
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{
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int fd, saved_errno = 0;
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GstVaDisplayDrm *self = GST_VA_DISPLAY_DRM (display);
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fd = open (self->path, O_RDWR);
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saved_errno = errno;
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if (fd < 0) {
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GST_WARNING_OBJECT (self, "Failed to open %s: %s", self->path,
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g_strerror (saved_errno));
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close (fd);
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return 0;
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}
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#if HAVE_LIBDRM
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{
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drmVersion *version;
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version = drmGetVersion (fd);
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if (!version) {
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GST_ERROR_OBJECT (self, "Device %s is not a DRM render node", self->path);
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return 0;
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}
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GST_INFO_OBJECT (self, "DRM render node with kernel driver %s",
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version->name);
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drmFreeVersion (version);
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}
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#endif
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self->fd = fd;
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return vaGetDisplayDRM (self->fd);
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}
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static void
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gst_va_display_drm_class_init (GstVaDisplayDrmClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstVaDisplayClass *vadisplay_class = GST_VA_DISPLAY_CLASS (klass);
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gobject_class->set_property = gst_va_display_drm_set_property;
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gobject_class->get_property = gst_va_display_drm_get_property;
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gobject_class->finalize = gst_va_display_drm_finalize;
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vadisplay_class->create_va_display = gst_va_display_drm_create_va_display;
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g_properties[PROP_PATH] =
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g_param_spec_string ("path", "render-path", "The path of DRM device",
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"/dev/dri/renderD128",
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT_ONLY);
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g_object_class_install_properties (gobject_class, N_PROPERTIES, g_properties);
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}
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static void
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gst_va_display_drm_init (GstVaDisplayDrm * self)
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{
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self->fd = -1;
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}
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/**
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* gst_va_display_drm_new_from_path:
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* @path: the path to the DRM device
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*
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* Creates a new #GstVaDisplay from a DRM device . It will try to open
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* and operate the device in @path.
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*
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* Returns: (transfer full): a newly allocated #GstVaDisplay if the
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* specified DRM render device could be opened and initialized;
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* otherwise %NULL is returned.
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*
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* Since: 1.20
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**/
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GstVaDisplay *
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gst_va_display_drm_new_from_path (const gchar * path)
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{
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GstVaDisplay *dpy;
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g_return_val_if_fail (path, NULL);
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dpy = g_object_new (GST_TYPE_VA_DISPLAY_DRM, "path", path, NULL);
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if (!gst_va_display_initialize (dpy)) {
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gst_object_unref (dpy);
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return NULL;
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}
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return gst_object_ref_sink (dpy);
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}
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