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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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322 lines
11 KiB
C
322 lines
11 KiB
C
/*
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* GStreamer
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* Copyright (C) 2017 Collabora Inc.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.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:element-fakevideosink
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* @title: fakevideosink
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*
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* This element is the same as fakesink but will pretend to support various
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* allocation meta API like GstVideoMeta in order to prevent memory copies.
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* This is useful for throughput testing and testing zero-copy path while
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* creating a new pipeline.
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*
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* ## Example launch lines
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* |[
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* gst-launch-1.0 videotestsrc ! fakevideosink
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* gst-launch-1.0 videotestsrc ! fpsdisplaysink text-overlay=false video-sink=fakevideosink
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* ]|
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*
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* Since 1.14
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*/
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#include "gstfakevideosink.h"
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#include <gst/video/video.h>
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#define C_FLAGS(v) ((guint) v)
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GType
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gst_fake_video_sink_allocation_meta_flags_get_type (void)
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{
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static const GFlagsValue values[] = {
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{C_FLAGS (GST_ALLOCATION_FLAG_CROP_META),
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"Expose the crop meta as supported", "crop"},
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{C_FLAGS (GST_ALLOCATION_FLAG_OVERLAY_COMPOSITION_META),
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"Expose the overlay composition meta as supported",
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"overlay-composition"},
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{0, NULL, NULL}
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};
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static volatile GType id = 0;
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if (g_once_init_enter ((gsize *) & id)) {
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GType _id;
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_id =
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g_flags_register_static ("GstFakeVideoSinkAllocationMetaFlags", values);
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g_once_init_leave ((gsize *) & id, _id);
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}
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return id;
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}
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enum
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{
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PROP_0,
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PROP_ALLOCATION_META_FLAGS,
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PROP_LAST
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};
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#define ALLOCATION_META_DEFAULT_FLAGS GST_ALLOCATION_FLAG_CROP_META | GST_ALLOCATION_FLAG_OVERLAY_COMPOSITION_META
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY",
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GST_VIDEO_FORMATS_ALL)));
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G_DEFINE_TYPE (GstFakeVideoSink, gst_fake_video_sink, GST_TYPE_BIN);
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static gboolean
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gst_fake_video_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
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{
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GstFakeVideoSink *self = GST_FAKE_VIDEO_SINK (parent);
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GstCaps *caps;
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GstVideoInfo info;
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guint min_buffers = 1;
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if (GST_QUERY_TYPE (query) != GST_QUERY_ALLOCATION)
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return gst_pad_query_default (pad, parent, query);
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gst_query_parse_allocation (query, &caps, NULL);
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if (!gst_video_info_from_caps (&info, caps))
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return FALSE;
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/* Request an extra buffer if we are keeping a ref on the last rendered buffer */
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if (gst_base_sink_is_last_sample_enabled (GST_BASE_SINK (self->child)))
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min_buffers++;
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gst_query_add_allocation_pool (query, NULL, info.size, min_buffers, 0);
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gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
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GST_OBJECT_LOCK (self);
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if (self->allocation_meta_flags & GST_ALLOCATION_FLAG_CROP_META)
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gst_query_add_allocation_meta (query, GST_VIDEO_CROP_META_API_TYPE, NULL);
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if (self->allocation_meta_flags &
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GST_ALLOCATION_FLAG_OVERLAY_COMPOSITION_META)
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gst_query_add_allocation_meta (query,
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GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, NULL);
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GST_OBJECT_UNLOCK (self);
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/* add here any meta API that would help support zero-copy */
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return TRUE;
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}
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/* TODO complete the types and make this an utility */
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static void
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gst_fake_video_sink_proxy_properties (GstFakeVideoSink * self,
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GstElement * child)
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{
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static gsize initialized = 0;
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if (g_once_init_enter (&initialized)) {
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GObjectClass *object_class;
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GParamSpec **properties;
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guint n_properties, i;
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object_class = G_OBJECT_CLASS (GST_FAKE_VIDEO_SINK_GET_CLASS (self));
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properties = g_object_class_list_properties (G_OBJECT_GET_CLASS (child),
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&n_properties);
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/**
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* GstFakeVideoSink:allocation-meta-flags
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*
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* Control the behaviour of the sink allocation query handler.
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*
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* Since: 1.18
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*/
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g_object_class_install_property (object_class, PROP_ALLOCATION_META_FLAGS,
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g_param_spec_flags ("allocation-meta-flags", "Flags",
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"Flags to control behaviour",
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GST_TYPE_FAKE_VIDEO_SINK_ALLOCATION_META_FLAGS,
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ALLOCATION_META_DEFAULT_FLAGS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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for (i = 0; i < n_properties; i++) {
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guint property_id = i + PROP_LAST;
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if (properties[i]->owner_type != G_OBJECT_TYPE (child) &&
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properties[i]->owner_type != GST_TYPE_BASE_SINK)
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continue;
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if (G_IS_PARAM_SPEC_BOOLEAN (properties[i])) {
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GParamSpecBoolean *prop = G_PARAM_SPEC_BOOLEAN (properties[i]);
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g_object_class_install_property (object_class, property_id,
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g_param_spec_boolean (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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prop->default_value, properties[i]->flags));
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} else if (G_IS_PARAM_SPEC_INT (properties[i])) {
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GParamSpecInt *prop = G_PARAM_SPEC_INT (properties[i]);
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g_object_class_install_property (object_class, property_id,
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g_param_spec_int (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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prop->minimum, prop->maximum, prop->default_value,
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properties[i]->flags));
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} else if (G_IS_PARAM_SPEC_UINT (properties[i])) {
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GParamSpecUInt *prop = G_PARAM_SPEC_UINT (properties[i]);
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g_object_class_install_property (object_class, property_id,
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g_param_spec_uint (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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prop->minimum, prop->maximum, prop->default_value,
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properties[i]->flags));
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} else if (G_IS_PARAM_SPEC_INT64 (properties[i])) {
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GParamSpecInt64 *prop = G_PARAM_SPEC_INT64 (properties[i]);
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g_object_class_install_property (object_class, property_id,
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g_param_spec_int64 (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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prop->minimum, prop->maximum, prop->default_value,
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properties[i]->flags));
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} else if (G_IS_PARAM_SPEC_UINT64 (properties[i])) {
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GParamSpecUInt64 *prop = G_PARAM_SPEC_UINT64 (properties[i]);
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g_object_class_install_property (object_class, property_id,
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g_param_spec_uint64 (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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prop->minimum, prop->maximum, prop->default_value,
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properties[i]->flags));
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} else if (G_IS_PARAM_SPEC_ENUM (properties[i])) {
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GParamSpecEnum *prop = G_PARAM_SPEC_ENUM (properties[i]);
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g_object_class_install_property (object_class, property_id,
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g_param_spec_enum (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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properties[i]->value_type, prop->default_value,
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properties[i]->flags));
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} else if (G_IS_PARAM_SPEC_STRING (properties[i])) {
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GParamSpecString *prop = G_PARAM_SPEC_STRING (properties[i]);
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g_object_class_install_property (object_class, property_id,
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g_param_spec_string (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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prop->default_value, properties[i]->flags));
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} else if (G_IS_PARAM_SPEC_BOXED (properties[i])) {
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g_object_class_install_property (object_class, property_id,
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g_param_spec_boxed (g_param_spec_get_name (properties[i]),
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g_param_spec_get_nick (properties[i]),
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g_param_spec_get_blurb (properties[i]),
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properties[i]->value_type, properties[i]->flags));
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}
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}
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g_free (properties);
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g_once_init_leave (&initialized, 1);
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}
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}
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static void
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gst_fake_video_sink_init (GstFakeVideoSink * self)
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{
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GstElement *child;
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GstPadTemplate *template = gst_static_pad_template_get (&sink_factory);
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child = gst_element_factory_make ("fakesink", "sink");
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self->allocation_meta_flags = ALLOCATION_META_DEFAULT_FLAGS;
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if (child) {
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GstPad *sink_pad = gst_element_get_static_pad (child, "sink");
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GstPad *ghost_pad;
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/* mimic GstVideoSink base class */
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g_object_set (child, "max-lateness", 5 * GST_MSECOND,
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"processing-deadline", 15 * GST_MSECOND, "qos", TRUE, "sync", TRUE,
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NULL);
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gst_bin_add (GST_BIN (self), child);
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ghost_pad = gst_ghost_pad_new_from_template ("sink", sink_pad, template);
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gst_object_unref (template);
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gst_element_add_pad (GST_ELEMENT (self), ghost_pad);
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gst_object_unref (sink_pad);
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gst_pad_set_query_function (ghost_pad, gst_fake_video_sink_query);
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self->child = child;
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gst_fake_video_sink_proxy_properties (self, child);
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} else {
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g_warning ("Check your GStreamer installation, "
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"core element 'fakesink' is missing.");
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}
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}
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static void
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gst_fake_video_sink_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GstFakeVideoSink *self = GST_FAKE_VIDEO_SINK (object);
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switch (property_id) {
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case PROP_ALLOCATION_META_FLAGS:
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GST_OBJECT_LOCK (self);
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g_value_set_flags (value, self->allocation_meta_flags);
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GST_OBJECT_UNLOCK (self);
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break;
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default:
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g_object_get_property (G_OBJECT (self->child), pspec->name, value);
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break;
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}
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}
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static void
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gst_fake_video_sink_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstFakeVideoSink *self = GST_FAKE_VIDEO_SINK (object);
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switch (property_id) {
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case PROP_ALLOCATION_META_FLAGS:
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GST_OBJECT_LOCK (self);
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self->allocation_meta_flags = g_value_get_flags (value);
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GST_OBJECT_UNLOCK (self);
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break;
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default:
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g_object_set_property (G_OBJECT (self->child), pspec->name, value);
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break;
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}
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}
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static void
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gst_fake_video_sink_class_init (GstFakeVideoSinkClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->get_property = gst_fake_video_sink_get_property;
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object_class->set_property = gst_fake_video_sink_set_property;
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gst_element_class_add_static_pad_template (element_class, &sink_factory);
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gst_element_class_set_static_metadata (element_class, "Fake Video Sink",
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"Video/Sink", "Fake video display that allows zero-copy",
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"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
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gst_type_mark_as_plugin_api (GST_TYPE_FAKE_VIDEO_SINK_ALLOCATION_META_FLAGS,
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0);
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}
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