Add fakevideosink element

This is a wrapper around fakesink that will advertise GstVideoMeta
and other meta API in order to achieve zero-copy whenever possible.
his new element is useful when doing performance testing with
video stream and don't want the sink capability to change the
upstream behaviour.

https://bugzilla.gnome.org/show_bug.cgi?id=793624
This commit is contained in:
Nicolas Dufresne 2018-02-19 22:02:14 -05:00
parent ccb0837903
commit f0c676c0f9
5 changed files with 275 additions and 2 deletions

View file

@ -8,7 +8,8 @@ libgstdebugutilsbad_la_SOURCES = \
gstchopmydata.c \ gstchopmydata.c \
gstcompare.c \ gstcompare.c \
gstwatchdog.c \ gstwatchdog.c \
gsterrorignore.c gsterrorignore.c \
gstfakevideosink.c
libgstdebugutilsbad_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) libgstdebugutilsbad_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
libgstdebugutilsbad_la_LIBADD = $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) \ libgstdebugutilsbad_la_LIBADD = $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) \
@ -22,4 +23,5 @@ noinst_HEADERS = fpsdisplaysink.h \
gstcompare.h \ gstcompare.h \
gstdebugspy.h \ gstdebugspy.h \
gstwatchdog.h \ gstwatchdog.h \
gsterrorignore.h gsterrorignore.h \
gstfakevideosink.h

View file

@ -30,6 +30,7 @@ GType gst_compare_get_type (void);
GType gst_debug_spy_get_type (void); GType gst_debug_spy_get_type (void);
GType gst_error_ignore_get_type (void); GType gst_error_ignore_get_type (void);
GType gst_watchdog_get_type (void); GType gst_watchdog_get_type (void);
GType gst_fake_video_sink_get_type (void);
static gboolean static gboolean
plugin_init (GstPlugin * plugin) plugin_init (GstPlugin * plugin)
@ -48,6 +49,8 @@ plugin_init (GstPlugin * plugin)
gst_watchdog_get_type ()); gst_watchdog_get_type ());
gst_element_register (plugin, "errorignore", GST_RANK_NONE, gst_element_register (plugin, "errorignore", GST_RANK_NONE,
gst_error_ignore_get_type ()); gst_error_ignore_get_type ());
gst_element_register (plugin, "fakevideosink", GST_RANK_NONE,
gst_fake_video_sink_get_type ());
return TRUE; return TRUE;
} }

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@ -0,0 +1,207 @@
/*
* GStreamer
* Copyright (C) 2017 Collabora Inc.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.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.
*/
#include "gstfakevideosink.h"
#include <gst/video/video.h>
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY",
GST_VIDEO_FORMATS_ALL)));
G_DEFINE_TYPE (GstFakeVideoSink, gst_fake_video_sink, GST_TYPE_BIN);
static gboolean
gst_fake_video_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstCaps *caps;
GstVideoInfo info;
if (GST_QUERY_TYPE (query) != GST_QUERY_ALLOCATION)
return gst_pad_query_default (pad, parent, query);
gst_query_parse_allocation (query, &caps, NULL);
if (!gst_video_info_from_caps (&info, caps))
return FALSE;
gst_query_add_allocation_pool (query, NULL, info.size, 1, 0);
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
gst_query_add_allocation_meta (query, GST_VIDEO_CROP_META_API_TYPE, NULL);
gst_query_add_allocation_meta (query,
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, NULL);
/* add here any meta API that would help support zero-copy */
return TRUE;
}
/* TODO complete the types and make this an utility */
static void
gst_fake_video_sink_proxy_properties (GstFakeVideoSink * self,
GstElement * child)
{
static gsize initialized = 0;
if (g_once_init_enter (&initialized)) {
GObjectClass *object_class;
GParamSpec **properties;
guint n_properties, i;
object_class = G_OBJECT_CLASS (GST_FAKE_VIDEO_SINK_GET_CLASS (self));
properties = g_object_class_list_properties (G_OBJECT_GET_CLASS (child),
&n_properties);
for (i = 0; i < n_properties; i++) {
if (properties[i]->owner_type != G_OBJECT_TYPE (child) &&
properties[i]->owner_type != GST_TYPE_BASE_SINK)
continue;
if (G_IS_PARAM_SPEC_BOOLEAN (properties[i])) {
GParamSpecBoolean *prop = G_PARAM_SPEC_BOOLEAN (properties[i]);
g_object_class_install_property (object_class, i + 1,
g_param_spec_boolean (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
prop->default_value, properties[i]->flags));
} else if (G_IS_PARAM_SPEC_INT (properties[i])) {
GParamSpecInt *prop = G_PARAM_SPEC_INT (properties[i]);
g_object_class_install_property (object_class, i + 1,
g_param_spec_int (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
prop->minimum, prop->maximum, prop->default_value,
properties[i]->flags));
} else if (G_IS_PARAM_SPEC_UINT (properties[i])) {
GParamSpecUInt *prop = G_PARAM_SPEC_UINT (properties[i]);
g_object_class_install_property (object_class, i + 1,
g_param_spec_uint (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
prop->minimum, prop->maximum, prop->default_value,
properties[i]->flags));
} else if (G_IS_PARAM_SPEC_INT64 (properties[i])) {
GParamSpecInt64 *prop = G_PARAM_SPEC_INT64 (properties[i]);
g_object_class_install_property (object_class, i + 1,
g_param_spec_int64 (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
prop->minimum, prop->maximum, prop->default_value,
properties[i]->flags));
} else if (G_IS_PARAM_SPEC_UINT64 (properties[i])) {
GParamSpecUInt64 *prop = G_PARAM_SPEC_UINT64 (properties[i]);
g_object_class_install_property (object_class, i + 1,
g_param_spec_uint64 (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
prop->minimum, prop->maximum, prop->default_value,
properties[i]->flags));
} else if (G_IS_PARAM_SPEC_ENUM (properties[i])) {
GParamSpecEnum *prop = G_PARAM_SPEC_ENUM (properties[i]);
g_object_class_install_property (object_class, i + 1,
g_param_spec_enum (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
properties[i]->value_type, prop->default_value,
properties[i]->flags));
} else if (G_IS_PARAM_SPEC_STRING (properties[i])) {
GParamSpecString *prop = G_PARAM_SPEC_STRING (properties[i]);
g_object_class_install_property (object_class, i + 1,
g_param_spec_string (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
prop->default_value, properties[i]->flags));
} else if (G_IS_PARAM_SPEC_BOXED (properties[i])) {
g_object_class_install_property (object_class, i + 1,
g_param_spec_boxed (g_param_spec_get_name (properties[i]),
g_param_spec_get_nick (properties[i]),
g_param_spec_get_blurb (properties[i]),
properties[i]->value_type, properties[i]->flags));
}
}
g_free (properties);
g_once_init_leave (&initialized, 1);
}
}
static void
gst_fake_video_sink_init (GstFakeVideoSink * self)
{
GstElement *child;
child = gst_element_factory_make ("fakesink", "sink");
if (child) {
GstPad *sink_pad = gst_element_get_static_pad (child, "sink");
GstPad *ghost_pad;
/* mimic GstVideoSink base class */
g_object_set (child, "max-lateness", 20000000, "qos", TRUE, "sync", TRUE,
NULL);
gst_bin_add (GST_BIN (self), child);
ghost_pad = gst_ghost_pad_new ("sink", sink_pad);
gst_element_add_pad (GST_ELEMENT (self), ghost_pad);
gst_object_unref (sink_pad);
gst_pad_set_query_function (ghost_pad, gst_fake_video_sink_query);
self->child = child;
gst_fake_video_sink_proxy_properties (self, child);
} else {
g_warning ("Check your GStreamer installation, "
"core element 'fakesink' is missing.");
}
}
static void
gst_fake_video_sink_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstFakeVideoSink *self = GST_FAKE_VIDEO_SINK (object);
g_object_get_property (G_OBJECT (self->child), pspec->name, value);
}
static void
gst_fake_video_sink_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstFakeVideoSink *self = GST_FAKE_VIDEO_SINK (object);
g_object_set_property (G_OBJECT (self->child), pspec->name, value);
}
static void
gst_fake_video_sink_class_init (GstFakeVideoSinkClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->get_property = gst_fake_video_sink_get_property;
object_class->set_property = gst_fake_video_sink_set_property;
gst_element_class_add_static_pad_template (element_class, &sink_factory);
gst_element_class_set_static_metadata (element_class, "Fake Video Sink",
"Video/Sink", "Fake video display that allow zero-copy",
"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
}

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@ -0,0 +1,60 @@
/*
* GStreamer
* Copyright (C) 2017 Collabora Inc.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.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.
*/
#ifndef _GST_FAKE_VIDEO_SINK_H_
#define _GST_FAKE_VIDEO_SINK_H_
#include <gst/gst.h>
#define GST_TYPE_FAKE_VIDEO_SINK \
(gst_fake_video_sink_get_type())
#define GST_FAKE_VIDEO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_FAKE_VIDEO_SINK, GstFakeVideoSink))
#define GST_FAKE_VIDEO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_FAKE_VIDEO_SINK, GstFakeVideoSinkClass))
#define GST_FAKE_VIDEO_SINK_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj), GST_TYPE_FAKE_VIDEO_SINK, GstFakeVideoSinkClass))
#define GST_IS_FAKE_VIDEO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_FAKE_VIDEO_SINK))
#define GST_IS_FAKE_VIDEO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_FAKE_VIDEO_SINK))
G_BEGIN_DECLS
typedef struct _GstFakeVideoSink GstFakeVideoSink;
typedef struct _GstFakeVideoSinkClass GstFakeVideoSinkClass;
struct _GstFakeVideoSink
{
GstBin parent;
GstElement *child;
};
struct _GstFakeVideoSinkClass
{
GstBinClass parent;
};
GType gst_fake_video_sink_get_type (void);
G_END_DECLS
#endif

View file

@ -6,6 +6,7 @@ debugutilsbad_sources = [
'gstchecksumsink.c', 'gstchecksumsink.c',
'gstchopmydata.c', 'gstchopmydata.c',
'gstcompare.c', 'gstcompare.c',
'gstfakevideosink.c',
'gstwatchdog.c', 'gstwatchdog.c',
] ]