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/*
* 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.
*/
/**
* SECTION:element-fakevideosink
* @title: fakevideosink
*
* This element is the same as fakesink but will pretend to support various
* allocation meta API like GstVideoMeta in order to prevent memory copies.
* This is useful for throughput testing and testing zero-copy path while
* creating a new pipeline.
*
* ## Example launch lines
* |[
* gst-launch-1.0 videotestsrc ! fakevideosink
* gst-launch-1.0 videotestsrc ! fpsdisplaysink text-overlay=false video-sink=fakevideosink
* ]|
*
* Since 1.14
*/
#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)
{
GstFakeVideoSink *self = GST_FAKE_VIDEO_SINK (parent);
GstCaps *caps;
GstVideoInfo info;
guint min_buffers = 1;
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;
/* Request an extra buffer if we are keeping a ref on the last rendered buffer */
if (gst_base_sink_is_last_sample_enabled (GST_BASE_SINK (self->child)))
min_buffers++;
gst_query_add_allocation_pool (query, NULL, info.size, min_buffers, 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;
GstPadTemplate *template = gst_static_pad_template_get (&sink_factory);
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", 5 * GST_MSECOND,
"processing-deadline", 15 * GST_MSECOND, "qos", TRUE, "sync", TRUE,
NULL);
gst_bin_add (GST_BIN (self), child);
ghost_pad = gst_ghost_pad_new_from_template ("sink", sink_pad, template);
gst_object_unref (template);
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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