gstreamer/subprojects/gst-plugins-bad/gst/autoconvert/gstautovideoflip.c

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/* GStreamer
* Copyright 2023 Igalia S.L.
* @author: Thibault Saunier <tsaunier@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.
*/
/**
* SECTION:element-autovideoflip
* @title: autovideoflip
*
* The #autovideoflip element is used to flip the video plugging the right
* element depending on caps and underlying buffer memory.
*
* Since: 1.24
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/video/video.h>
#include "gstautovideo.h"
#include "gstautovideoflip.h"
GST_DEBUG_CATEGORY (autovideoflip_debug);
#define GST_CAT_DEFAULT (autovideoflip_debug)
#define PROP_DIRECTION_DEFAULT GST_VIDEO_ORIENTATION_IDENTITY
/* GstVideoFlip properties */
enum
{
PROP_0,
PROP_VIDEO_DIRECTION
};
struct _GstAutoVideoFlip
{
GstBaseAutoConvert parent;
GstVideoOrientationMethod direction;
GList *bindings;
};
G_DEFINE_TYPE (GstAutoVideoFlip, gst_auto_video_flip,
GST_TYPE_BASE_AUTO_CONVERT);
GST_ELEMENT_REGISTER_DEFINE (autovideoflip, "autovideoflip",
GST_RANK_NONE, gst_auto_video_flip_get_type ());
static void
gst_auto_video_flip_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAutoVideoFlip *self = GST_AUTO_VIDEO_FLIP (object);
switch (prop_id) {
case PROP_VIDEO_DIRECTION:
self->direction = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_auto_video_flip_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAutoVideoFlip *self = GST_AUTO_VIDEO_FLIP (object);
switch (prop_id) {
case PROP_VIDEO_DIRECTION:
g_value_set_enum (value, self->direction);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
#if !GLIB_CHECK_VERSION(2, 68, 0)
static GObject *
g_binding_dup_target (GBinding * binding)
{
return g_object_ref (g_binding_get_target (binding));
}
#endif
static gboolean
element_is_handled_video_flip (GstElement * element)
{
GstElementFactory *factory = gst_element_get_factory (element);
return !g_strcmp0 (GST_OBJECT_NAME (factory), "glvideoflip") ||
!g_strcmp0 (GST_OBJECT_NAME (factory), "videoflip");
}
static gboolean
gst_auto_video_flip_transform_to (GBinding * binding, const GValue * from,
GValue * to_value, gpointer _udata)
{
g_value_set_enum (to_value, g_value_get_enum (from));
return TRUE;
}
static void
gst_auto_video_flip_deep_element_added (GstBin * bin, GstBin * sub_bin,
GstElement * element)
{
GstAutoVideoFlip *self = GST_AUTO_VIDEO_FLIP (bin);
GList *new_bindings = NULL;
if (!element_is_handled_video_flip (element))
goto done;
GST_OBJECT_LOCK (bin);
for (GList * tmp = self->bindings; tmp; tmp = tmp->next) {
GBinding *binding = tmp->data;
GObject *target = g_binding_dup_target (binding);
if (GST_ELEMENT (target) == element) {
GST_INFO_OBJECT (self, "Newly added element %s already bound",
GST_OBJECT_NAME (gst_element_get_factory (element)));
GST_OBJECT_UNLOCK (bin);
gst_object_unref (target);
goto done;
}
gst_object_unref (target);
}
GST_OBJECT_UNLOCK (bin);
new_bindings = g_list_prepend (new_bindings,
g_object_bind_property_full (bin, "video-direction",
element, "video-direction",
G_BINDING_SYNC_CREATE | G_BINDING_DEFAULT,
gst_auto_video_flip_transform_to, NULL, NULL, NULL)
);
GST_OBJECT_LOCK (bin);
self->bindings = g_list_concat (self->bindings, new_bindings);
GST_OBJECT_UNLOCK (bin);
done:
GST_BIN_CLASS (gst_auto_video_flip_parent_class)->deep_element_added (bin,
sub_bin, element);
}
static void
gst_auto_video_flip_deep_element_removed (GstBin * bin, GstBin * sub_bin,
GstElement * element)
{
GList *bindings = NULL;
GstAutoVideoFlip *self = GST_AUTO_VIDEO_FLIP (bin);
if (!element_is_handled_video_flip (element))
goto done;
GST_OBJECT_LOCK (bin);
for (GList * tmp = self->bindings; tmp; tmp = tmp->next) {
GBinding *binding = tmp->data;
GObject *target = g_binding_dup_target (binding);
if (GST_ELEMENT (target) == element) {
GList *node = tmp;
bindings = g_list_prepend (bindings, binding);
tmp = tmp->prev;
self->bindings = g_list_delete_link (self->bindings, node);
if (!tmp)
break;
}
gst_object_unref (target);
}
GST_OBJECT_UNLOCK (bin);
done:
GST_BIN_CLASS (gst_auto_video_flip_parent_class)->deep_element_removed (bin,
sub_bin, element);
}
static void
gst_auto_video_flip_class_init (GstAutoVideoFlipClass * klass)
{
GstElementClass *gstelement_class = (GstElementClass *) klass;
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBinClass *gstbin_class = (GstBinClass *) klass;
GST_DEBUG_CATEGORY_INIT (autovideoflip_debug, "autovideoflip", 0,
"Auto video flipper");
gobject_class->set_property = gst_auto_video_flip_set_property;
gobject_class->get_property = gst_auto_video_flip_get_property;
g_object_class_install_property (gobject_class, PROP_VIDEO_DIRECTION,
g_param_spec_enum ("video-direction", "video-direction",
"Video direction: rotation and flipping",
GST_TYPE_VIDEO_ORIENTATION_METHOD, PROP_DIRECTION_DEFAULT,
GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (gstelement_class,
"Flip the video plugging the right element depending on caps",
"Bin/Filter/Effect/Video",
"Selects the right video flip element based on the caps",
"Thibault Saunier <tsaunier@igalia.com>");
gstbin_class->deep_element_added = gst_auto_video_flip_deep_element_added;
gstbin_class->deep_element_removed = gst_auto_video_flip_deep_element_removed;
}
static void
gst_auto_video_flip_init (GstAutoVideoFlip * self)
{
self->direction = PROP_DIRECTION_DEFAULT;
/* *INDENT-OFF* */
static const GstAutoVideoFilterGenerator gen[] = {
{
.first_elements = { "bayer2rgb", NULL},
.colorspace_converters = { "videoconvertscale", NULL },
.last_elements = { NULL } ,
.filters = { "videoflip", NULL },
.rank = GST_RANK_MARGINAL,
},
{
.first_elements = { NULL, },
.colorspace_converters = { "videoconvertscale", NULL },
.last_elements = { NULL },
.filters = { "videoflip" },
.rank = GST_RANK_SECONDARY,
},
{
.first_elements = { NULL, },
.colorspace_converters = { "videoconvertscale", NULL },
.last_elements = { "rgb2bayer", NULL },
.filters = { "videoflip" },
.rank = GST_RANK_MARGINAL,
},
{
.first_elements = { "glupload" },
.colorspace_converters = { "glcolorconvert", NULL },
.last_elements = { NULL, },
.filters = { "glvideoflip" },
.rank = GST_RANK_PRIMARY,
},
{
.first_elements = { NULL },
.colorspace_converters = { "glcolorconvert", NULL },
.last_elements = { NULL, },
.filters = { "glvideoflip" },
.rank = GST_RANK_PRIMARY,
},
{
.first_elements = { "videoconvertscale", "glupload", NULL },
.colorspace_converters = { NULL },
.last_elements = { NULL },
.filters = { "glvideoflip", NULL },
.rank = GST_RANK_MARGINAL + 1,
},
{
.first_elements = { NULL },
.colorspace_converters = { NULL },
.last_elements = { "gldownload", NULL },
.filters = { "glvideoflip", NULL },
.rank = GST_RANK_MARGINAL + 1,
},
{ /* CUDA -> GL */
.first_elements = { "capsfilter caps=video/x-raw(memory:CUDAMemory)", "cudadownload", NULL },
.colorspace_converters = { "glcolorconvert", "glcolorscale", "glcolorconvert", NULL },
.last_elements = { NULL },
.filters = { "glvideoflip", NULL },
.rank = GST_RANK_PRIMARY - 1,
},
{ /* CUDA -> CUDA */
.first_elements = { "capsfilter caps=video/x-raw(memory:CUDAMemory)", "cudadownload", NULL },
.colorspace_converters = { "glcolorconvert", "glcolorscale", "glcolorconvert", NULL },
.last_elements = { "cudaupload", "capsfilter caps=video/x-raw(memory:CUDAMemory)", NULL },
.filters = { "glvideoflip", NULL },
.rank = GST_RANK_SECONDARY - 1,
},
{ /* Software -> CUDA (uploading as soon as possible) */
.first_elements = { "glupload", NULL },
.colorspace_converters = { "glcoloconvert", NULL },
.last_elements = { "cudaupload", "capsfilter caps=video/x-raw(memory:CUDAMemory)", NULL },
.filters = { "glvideoflip", NULL },
.rank = GST_RANK_MARGINAL,
},
{ /* CUDA -> Software */
.first_elements = { "capsfilter caps=video/x-raw(memory:CUDAMemory)", "cudadownload", NULL },
.colorspace_converters = { "glcolorconvert", "glcolorscale", "glcolorconvert", NULL },
.last_elements = { "gldownload", NULL },
.filters = { "glvideoflip", NULL },
.rank = GST_RANK_MARGINAL,
},
{ /* Worst case we upload/download as required */
.first_elements = { NULL},
.colorspace_converters = { NULL },
.last_elements = { NULL },
.filters = { NULL },
.rank = 0,
},
};
/* *INDENT-ON* */
gst_auto_video_register_well_known_bins (GST_BASE_AUTO_CONVERT (self), gen);
}