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223 lines
7.8 KiB
C
223 lines
7.8 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* 2009 Nokia Corporation
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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:gesvideosource
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* @title: GESVideoSource
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* @short_description: Base Class for video sources
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*
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* ## Children Properties:
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*
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* You can use the following children properties through the
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* #ges_track_element_set_child_property and alike set of methods:
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*
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* - #gdouble `alpha`: The desired alpha for the stream.
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* - #gint `posx`: The desired x position for the stream.
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* - #gint `posy`: The desired y position for the stream
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* - #gint `width`: The desired width for that source.
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* Set to 0 if size is not mandatory, will be set to width of the current track.
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* - #gint `height`: The desired height for that source.
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* Set to 0 if size is not mandatory, will be set to height of the current track.
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* - #GstDeinterlaceModes `deinterlace-mode`: Deinterlace Mode
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* - #GstDeinterlaceFields `deinterlace-fields`: Fields to use for deinterlacing
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* - #GstDeinterlaceFieldLayout `deinterlace-tff`: Deinterlace top field first
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* - #GstVideoOrientationMethod `video-direction`: The desired video rotation and flipping.
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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 <gst/pbutils/missing-plugins.h>
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#include <gst/video/video.h>
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#include "ges-internal.h"
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#include "ges/ges-meta-container.h"
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#include "ges-track-element.h"
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#include "ges-video-source.h"
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#include "ges-layer.h"
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#include "gstframepositioner.h"
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#define parent_class ges_video_source_parent_class
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struct _GESVideoSourcePrivate
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{
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GstFramePositioner *positioner;
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GstElement *capsfilter;
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};
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G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GESVideoSource, ges_video_source,
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GES_TYPE_SOURCE);
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/* TrackElement VMethods */
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static gboolean
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_set_priority (GESTimelineElement * element, guint32 priority)
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{
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gboolean res;
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GESVideoSource *self = GES_VIDEO_SOURCE (element);
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res = GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_priority (element,
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priority);
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if (res && self->priv->positioner)
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g_object_set (self->priv->positioner, "zorder", G_MAXUINT - priority, NULL);
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return res;
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}
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static void
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post_missing_element_message (GstElement * element, const gchar * name)
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{
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GstMessage *msg;
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msg = gst_missing_element_message_new (element, name);
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gst_element_post_message (element, msg);
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}
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static GstElement *
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ges_video_source_create_element (GESTrackElement * trksrc)
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{
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GstElement *topbin;
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GstElement *sub_element;
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GstElement *queue = gst_element_factory_make ("queue", NULL);
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GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_GET_CLASS (trksrc);
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GESVideoSource *self;
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GstElement *positioner, *videoflip, *videoscale, *videorate, *capsfilter,
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*videoconvert, *deinterlace;
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const gchar *positioner_props[] =
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{ "alpha", "posx", "posy", "width", "height", NULL };
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const gchar *deinterlace_props[] = { "mode", "fields", "tff", NULL };
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const gchar *videoflip_props[] = { "video-direction", NULL };
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if (!source_class->create_source)
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return NULL;
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sub_element = source_class->create_source (trksrc);
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self = (GESVideoSource *) trksrc;
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/* That positioner will add metadata to buffers according to its
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properties, acting like a proxy for our smart-mixer dynamic pads. */
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positioner = gst_element_factory_make ("framepositioner", "frame_tagger");
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g_object_set (positioner, "zorder",
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G_MAXUINT - GES_TIMELINE_ELEMENT_PRIORITY (self), NULL);
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/* If there's image-orientation tag, make sure the image is correctly oriented
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* before we scale it. */
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videoflip = gst_element_factory_make ("videoflip", "track-element-videoflip");
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g_object_set (videoflip, "video-direction", GST_VIDEO_ORIENTATION_AUTO, NULL);
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videoscale =
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gst_element_factory_make ("videoscale", "track-element-videoscale");
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videoconvert =
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gst_element_factory_make ("videoconvert", "track-element-videoconvert");
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videorate = gst_element_factory_make ("videorate", "track-element-videorate");
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deinterlace = gst_element_factory_make ("deinterlace", "deinterlace");
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capsfilter =
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gst_element_factory_make ("capsfilter", "track-element-capsfilter");
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ges_frame_positioner_set_source_and_filter (GST_FRAME_POSITIONNER
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(positioner), trksrc, capsfilter);
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ges_track_element_add_children_props (trksrc, positioner, NULL, NULL,
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positioner_props);
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ges_track_element_add_children_props (trksrc, videoflip, NULL, NULL,
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videoflip_props);
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if (deinterlace == NULL) {
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post_missing_element_message (sub_element, "deinterlace");
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GST_ELEMENT_WARNING (sub_element, CORE, MISSING_PLUGIN,
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("Missing element '%s' - check your GStreamer installation.",
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"deinterlace"), ("deinterlacing won't work"));
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topbin =
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ges_source_create_topbin ("videosrcbin", sub_element, queue,
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videoconvert, positioner, videoflip, videoscale, videorate, capsfilter,
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NULL);
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} else {
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ges_track_element_add_children_props (trksrc, deinterlace, NULL, NULL,
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deinterlace_props);
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topbin =
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ges_source_create_topbin ("videosrcbin", sub_element, queue,
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videoconvert, deinterlace, positioner, videoflip, videoscale, videorate,
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capsfilter, NULL);
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}
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self->priv->positioner = GST_FRAME_POSITIONNER (positioner);
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self->priv->positioner->scale_in_compositor =
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!GES_VIDEO_SOURCE_GET_CLASS (self)->ABI.abi.disable_scale_in_compositor;
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self->priv->capsfilter = capsfilter;
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return topbin;
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}
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static gboolean
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_lookup_child (GESTimelineElement * object,
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const gchar * prop_name, GObject ** element, GParamSpec ** pspec)
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{
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gboolean res;
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gchar *clean_name;
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if (!g_strcmp0 (prop_name, "deinterlace-fields"))
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clean_name = g_strdup ("GstDeinterlace::fields");
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else if (!g_strcmp0 (prop_name, "deinterlace-mode"))
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clean_name = g_strdup ("GstDeinterlace::mode");
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else if (!g_strcmp0 (prop_name, "deinterlace-tff"))
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clean_name = g_strdup ("GstDeinterlace::tff");
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else if (!g_strcmp0 (prop_name, "tff") ||
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!g_strcmp0 (prop_name, "fields") || !g_strcmp0 (prop_name, "mode")) {
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GST_DEBUG_OBJECT (object, "Not allowed to use GstDeinterlace %s"
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" property without prefixing its name", prop_name);
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return FALSE;
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} else
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clean_name = g_strdup (prop_name);
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res =
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GES_TIMELINE_ELEMENT_CLASS (ges_video_source_parent_class)->lookup_child
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(object, clean_name, element, pspec);
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g_free (clean_name);
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return res;
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}
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static void
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ges_video_source_class_init (GESVideoSourceClass * klass)
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{
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GESTrackElementClass *track_element_class = GES_TRACK_ELEMENT_CLASS (klass);
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GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
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GESVideoSourceClass *video_source_class = GES_VIDEO_SOURCE_CLASS (klass);
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element_class->set_priority = _set_priority;
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element_class->lookup_child = _lookup_child;
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track_element_class->nleobject_factorytype = "nlesource";
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track_element_class->create_element = ges_video_source_create_element;
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video_source_class->create_source = NULL;
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}
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static void
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ges_video_source_init (GESVideoSource * self)
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{
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self->priv = ges_video_source_get_instance_private (self);
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self->priv->positioner = NULL;
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self->priv->capsfilter = NULL;
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}
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