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1137 lines
38 KiB
C
1137 lines
38 KiB
C
/* Video compositor plugin
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* Copyright (C) 2004, 2008 Wim Taymans <wim@fluendo.com>
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* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* Copyright (C) 2014 Mathieu Duponchelle <mathieu.duponchelle@opencreed.com>
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* Copyright (C) 2014 Thibault Saunier <tsaunier@gnome.org>
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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-compositor
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* @title: compositor
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*
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* Compositor can accept AYUV, ARGB and BGRA video streams. For each of the requested
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* sink pads it will compare the incoming geometry and framerate to define the
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* output parameters. Indeed output video frames will have the geometry of the
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* biggest incoming video stream and the framerate of the fastest incoming one.
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*
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* Compositor will do colorspace conversion.
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*
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* Individual parameters for each input stream can be configured on the
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* #GstCompositorPad:
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*
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* * "xpos": The x-coordinate position of the top-left corner of the picture (#gint)
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* * "ypos": The y-coordinate position of the top-left corner of the picture (#gint)
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* * "width": The width of the picture; the input will be scaled if necessary (#gint)
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* * "height": The height of the picture; the input will be scaled if necessary (#gint)
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* * "alpha": The transparency of the picture; between 0.0 and 1.0. The blending
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* is a simple copy when fully-transparent (0.0) and fully-opaque (1.0). (#gdouble)
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* * "zorder": The z-order position of the picture in the composition (#guint)
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*
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* ## Sample pipelines
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* |[
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* gst-launch-1.0 \
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* videotestsrc pattern=1 ! \
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* video/x-raw,format=AYUV,framerate=\(fraction\)10/1,width=100,height=100 ! \
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* videobox border-alpha=0 top=-70 bottom=-70 right=-220 ! \
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* compositor name=comp sink_0::alpha=0.7 sink_1::alpha=0.5 ! \
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* videoconvert ! xvimagesink \
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* videotestsrc ! \
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* video/x-raw,format=AYUV,framerate=\(fraction\)5/1,width=320,height=240 ! comp.
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* ]| A pipeline to demonstrate compositor used together with videobox.
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* This should show a 320x240 pixels video test source with some transparency
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* showing the background checker pattern. Another video test source with just
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* the snow pattern of 100x100 pixels is overlaid on top of the first one on
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* the left vertically centered with a small transparency showing the first
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* video test source behind and the checker pattern under it. Note that the
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* framerate of the output video is 10 frames per second.
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* |[
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* gst-launch-1.0 videotestsrc pattern=1 ! \
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* video/x-raw, framerate=\(fraction\)10/1, width=100, height=100 ! \
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* compositor name=comp ! videoconvert ! ximagesink \
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* videotestsrc ! \
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* video/x-raw, framerate=\(fraction\)5/1, width=320, height=240 ! comp.
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* ]| A pipeline to demostrate bgra comping. (This does not demonstrate alpha blending).
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* |[
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* gst-launch-1.0 videotestsrc pattern=1 ! \
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* video/x-raw,format =I420, framerate=\(fraction\)10/1, width=100, height=100 ! \
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* compositor name=comp ! videoconvert ! ximagesink \
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* videotestsrc ! \
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* video/x-raw,format=I420, framerate=\(fraction\)5/1, width=320, height=240 ! comp.
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* ]| A pipeline to test I420
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* |[
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* gst-launch-1.0 compositor name=comp sink_1::alpha=0.5 sink_1::xpos=50 sink_1::ypos=50 ! \
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* videoconvert ! ximagesink \
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* videotestsrc pattern=snow timestamp-offset=3000000000 ! \
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* "video/x-raw,format=AYUV,width=640,height=480,framerate=(fraction)30/1" ! \
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* timeoverlay ! queue2 ! comp. \
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* videotestsrc pattern=smpte ! \
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* "video/x-raw,format=AYUV,width=800,height=600,framerate=(fraction)10/1" ! \
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* timeoverlay ! queue2 ! comp.
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* ]| A pipeline to demonstrate synchronized compositing (the second stream starts after 3 seconds)
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*
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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 <string.h>
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#include "compositor.h"
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#include "compositorpad.h"
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#ifdef DISABLE_ORC
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#define orc_memset memset
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#else
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#include <orc/orcfunctions.h>
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#endif
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GST_DEBUG_CATEGORY_STATIC (gst_compositor_debug);
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#define GST_CAT_DEFAULT gst_compositor_debug
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#define FORMATS " { AYUV, BGRA, ARGB, RGBA, ABGR, Y444, Y42B, YUY2, UYVY, "\
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" YVYU, I420, YV12, NV12, NV21, Y41B, RGB, BGR, xRGB, xBGR, "\
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" RGBx, BGRx } "
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS))
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);
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS))
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);
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#define DEFAULT_PAD_XPOS 0
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#define DEFAULT_PAD_YPOS 0
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#define DEFAULT_PAD_WIDTH 0
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#define DEFAULT_PAD_HEIGHT 0
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#define DEFAULT_PAD_ALPHA 1.0
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enum
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{
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PROP_PAD_0,
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PROP_PAD_XPOS,
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PROP_PAD_YPOS,
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PROP_PAD_WIDTH,
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PROP_PAD_HEIGHT,
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PROP_PAD_ALPHA
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};
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G_DEFINE_TYPE (GstCompositorPad, gst_compositor_pad,
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GST_TYPE_VIDEO_AGGREGATOR_PAD);
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static void
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gst_compositor_pad_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstCompositorPad *pad = GST_COMPOSITOR_PAD (object);
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switch (prop_id) {
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case PROP_PAD_XPOS:
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g_value_set_int (value, pad->xpos);
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break;
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case PROP_PAD_YPOS:
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g_value_set_int (value, pad->ypos);
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break;
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case PROP_PAD_WIDTH:
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g_value_set_int (value, pad->width);
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break;
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case PROP_PAD_HEIGHT:
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g_value_set_int (value, pad->height);
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break;
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case PROP_PAD_ALPHA:
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g_value_set_double (value, pad->alpha);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_compositor_pad_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstCompositorPad *pad = GST_COMPOSITOR_PAD (object);
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switch (prop_id) {
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case PROP_PAD_XPOS:
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pad->xpos = g_value_get_int (value);
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break;
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case PROP_PAD_YPOS:
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pad->ypos = g_value_get_int (value);
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break;
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case PROP_PAD_WIDTH:
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pad->width = g_value_get_int (value);
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break;
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case PROP_PAD_HEIGHT:
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pad->height = g_value_get_int (value);
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break;
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case PROP_PAD_ALPHA:
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pad->alpha = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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_mixer_pad_get_output_size (GstCompositor * comp,
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GstCompositorPad * comp_pad, gint out_par_n, gint out_par_d, gint * width,
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gint * height)
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{
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GstVideoAggregatorPad *vagg_pad = GST_VIDEO_AGGREGATOR_PAD (comp_pad);
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gint pad_width, pad_height;
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guint dar_n, dar_d;
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/* FIXME: Anything better we can do here? */
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if (!vagg_pad->info.finfo
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|| vagg_pad->info.finfo->format == GST_VIDEO_FORMAT_UNKNOWN) {
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GST_DEBUG_OBJECT (comp_pad, "Have no caps yet");
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*width = 0;
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*height = 0;
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return;
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}
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pad_width =
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comp_pad->width <=
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0 ? GST_VIDEO_INFO_WIDTH (&vagg_pad->info) : comp_pad->width;
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pad_height =
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comp_pad->height <=
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0 ? GST_VIDEO_INFO_HEIGHT (&vagg_pad->info) : comp_pad->height;
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if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, pad_width, pad_height,
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GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
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GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d)) {
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GST_WARNING_OBJECT (comp_pad, "Cannot calculate display aspect ratio");
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*width = *height = 0;
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return;
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}
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GST_LOG_OBJECT (comp_pad, "scaling %ux%u by %u/%u (%u/%u / %u/%u)", pad_width,
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pad_height, dar_n, dar_d, GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
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GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d);
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if (pad_height % dar_n == 0) {
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pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
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} else if (pad_width % dar_d == 0) {
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pad_height = gst_util_uint64_scale_int (pad_width, dar_d, dar_n);
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} else {
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pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
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}
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*width = pad_width;
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*height = pad_height;
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}
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static gboolean
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gst_compositor_pad_set_info (GstVideoAggregatorPad * pad,
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GstVideoAggregator * vagg G_GNUC_UNUSED,
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GstVideoInfo * current_info, GstVideoInfo * wanted_info)
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{
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GstCompositor *comp = GST_COMPOSITOR (vagg);
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GstCompositorPad *cpad = GST_COMPOSITOR_PAD (pad);
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gchar *colorimetry, *best_colorimetry;
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const gchar *chroma, *best_chroma;
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gint width, height;
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if (!current_info->finfo)
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return TRUE;
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if (GST_VIDEO_INFO_FORMAT (current_info) == GST_VIDEO_FORMAT_UNKNOWN)
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return TRUE;
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if (cpad->convert)
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gst_video_converter_free (cpad->convert);
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cpad->convert = NULL;
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if (GST_VIDEO_INFO_MULTIVIEW_MODE (current_info) !=
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GST_VIDEO_MULTIVIEW_MODE_NONE
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&& GST_VIDEO_INFO_MULTIVIEW_MODE (current_info) !=
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GST_VIDEO_MULTIVIEW_MODE_MONO) {
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GST_FIXME_OBJECT (pad, "Multiview support is not implemented yet");
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return FALSE;
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}
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colorimetry = gst_video_colorimetry_to_string (&(current_info->colorimetry));
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chroma = gst_video_chroma_to_string (current_info->chroma_site);
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best_colorimetry =
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gst_video_colorimetry_to_string (&(wanted_info->colorimetry));
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best_chroma = gst_video_chroma_to_string (wanted_info->chroma_site);
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_mixer_pad_get_output_size (comp, cpad, GST_VIDEO_INFO_PAR_N (&vagg->info),
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GST_VIDEO_INFO_PAR_D (&vagg->info), &width, &height);
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if (GST_VIDEO_INFO_FORMAT (wanted_info) !=
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GST_VIDEO_INFO_FORMAT (current_info)
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|| g_strcmp0 (colorimetry, best_colorimetry)
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|| g_strcmp0 (chroma, best_chroma)
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|| width != current_info->width || height != current_info->height) {
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GstVideoInfo tmp_info;
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/* Initialize with the wanted video format and our original width and
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* height as we don't want to rescale. Then copy over the wanted
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* colorimetry, and chroma-site and our current pixel-aspect-ratio
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* and other relevant fields.
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*/
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gst_video_info_set_format (&tmp_info, GST_VIDEO_INFO_FORMAT (wanted_info),
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width, height);
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tmp_info.chroma_site = wanted_info->chroma_site;
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tmp_info.colorimetry = wanted_info->colorimetry;
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tmp_info.par_n = wanted_info->par_n;
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tmp_info.par_d = wanted_info->par_d;
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tmp_info.fps_n = current_info->fps_n;
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tmp_info.fps_d = current_info->fps_d;
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tmp_info.flags = current_info->flags;
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tmp_info.interlace_mode = current_info->interlace_mode;
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GST_DEBUG_OBJECT (pad, "This pad will be converted from %d to %d",
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GST_VIDEO_INFO_FORMAT (current_info),
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GST_VIDEO_INFO_FORMAT (&tmp_info));
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cpad->convert = gst_video_converter_new (current_info, &tmp_info, NULL);
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cpad->conversion_info = tmp_info;
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if (!cpad->convert) {
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g_free (colorimetry);
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g_free (best_colorimetry);
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GST_WARNING_OBJECT (pad, "No path found for conversion");
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return FALSE;
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}
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} else {
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cpad->conversion_info = *current_info;
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GST_DEBUG_OBJECT (pad, "This pad will not need conversion");
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}
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g_free (colorimetry);
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g_free (best_colorimetry);
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return TRUE;
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}
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/* Test whether rectangle2 contains rectangle 1 (geometrically) */
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static gboolean
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is_rectangle_contained (GstVideoRectangle rect1, GstVideoRectangle rect2)
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{
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if ((rect2.x <= rect1.x) && (rect2.y <= rect1.y) &&
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((rect2.x + rect2.w) >= (rect1.x + rect1.w)) &&
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((rect2.y + rect2.h) >= (rect1.y + rect1.h)))
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return TRUE;
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return FALSE;
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}
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static GstVideoRectangle
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clamp_rectangle (gint x, gint y, gint w, gint h, gint outer_width,
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gint outer_height)
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{
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gint x2 = x + w;
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gint y2 = y + h;
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GstVideoRectangle clamped;
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/* Clamp the x/y coordinates of this frame to the output boundaries to cover
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* the case where (say, with negative xpos/ypos or w/h greater than the output
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* size) the non-obscured portion of the frame could be outside the bounds of
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* the video itself and hence not visible at all */
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clamped.x = CLAMP (x, 0, outer_width);
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clamped.y = CLAMP (y, 0, outer_height);
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clamped.w = CLAMP (x2, 0, outer_width) - clamped.x;
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clamped.h = CLAMP (y2, 0, outer_height) - clamped.y;
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return clamped;
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}
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static gboolean
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gst_compositor_pad_prepare_frame (GstVideoAggregatorPad * pad,
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GstVideoAggregator * vagg)
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{
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GstCompositor *comp = GST_COMPOSITOR (vagg);
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GstCompositorPad *cpad = GST_COMPOSITOR_PAD (pad);
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guint outsize;
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GstVideoFrame *converted_frame;
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GstBuffer *converted_buf = NULL;
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GstVideoFrame *frame;
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static GstAllocationParams params = { 0, 15, 0, 0, };
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gint width, height;
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gboolean frame_obscured = FALSE;
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GList *l;
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/* The rectangle representing this frame, clamped to the video's boundaries.
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* Due to the clamping, this is different from the frame width/height above. */
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GstVideoRectangle frame_rect;
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if (!pad->buffer)
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return TRUE;
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/* There's three types of width/height here:
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* 1. GST_VIDEO_FRAME_WIDTH/HEIGHT:
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* The frame width/height (same as pad->buffer_vinfo.height/width;
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* see gst_video_frame_map())
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* 2. cpad->width/height:
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* The optional pad property for scaling the frame (if zero, the video is
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* left unscaled)
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* 3. conversion_info.width/height:
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* Equal to cpad->width/height if it's set, otherwise it's the pad
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* width/height. See ->set_info()
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* */
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_mixer_pad_get_output_size (comp, cpad, GST_VIDEO_INFO_PAR_N (&vagg->info),
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GST_VIDEO_INFO_PAR_D (&vagg->info), &width, &height);
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/* The only thing that can change here is the width
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* and height, otherwise set_info would've been called */
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if (GST_VIDEO_INFO_WIDTH (&cpad->conversion_info) != width ||
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GST_VIDEO_INFO_HEIGHT (&cpad->conversion_info) != height) {
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gchar *colorimetry, *wanted_colorimetry;
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const gchar *chroma, *wanted_chroma;
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/* We might end up with no converter afterwards if
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* the only reason for conversion was a different
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* width or height
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*/
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if (cpad->convert)
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gst_video_converter_free (cpad->convert);
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cpad->convert = NULL;
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colorimetry =
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gst_video_colorimetry_to_string (&pad->buffer_vinfo.colorimetry);
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chroma = gst_video_chroma_to_string (pad->buffer_vinfo.chroma_site);
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wanted_colorimetry =
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gst_video_colorimetry_to_string (&cpad->conversion_info.colorimetry);
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wanted_chroma =
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gst_video_chroma_to_string (cpad->conversion_info.chroma_site);
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if (GST_VIDEO_INFO_FORMAT (&pad->buffer_vinfo) !=
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GST_VIDEO_INFO_FORMAT (&cpad->conversion_info)
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|| g_strcmp0 (colorimetry, wanted_colorimetry)
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|| g_strcmp0 (chroma, wanted_chroma)
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|| width != GST_VIDEO_INFO_WIDTH (&pad->buffer_vinfo)
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|| height != GST_VIDEO_INFO_HEIGHT (&pad->buffer_vinfo)) {
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GstVideoInfo tmp_info;
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gst_video_info_set_format (&tmp_info, cpad->conversion_info.finfo->format,
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width, height);
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tmp_info.chroma_site = cpad->conversion_info.chroma_site;
|
|
tmp_info.colorimetry = cpad->conversion_info.colorimetry;
|
|
tmp_info.par_n = vagg->info.par_n;
|
|
tmp_info.par_d = vagg->info.par_d;
|
|
tmp_info.fps_n = cpad->conversion_info.fps_n;
|
|
tmp_info.fps_d = cpad->conversion_info.fps_d;
|
|
tmp_info.flags = cpad->conversion_info.flags;
|
|
tmp_info.interlace_mode = cpad->conversion_info.interlace_mode;
|
|
|
|
GST_DEBUG_OBJECT (pad, "This pad will be converted from %d to %d",
|
|
GST_VIDEO_INFO_FORMAT (&pad->buffer_vinfo),
|
|
GST_VIDEO_INFO_FORMAT (&tmp_info));
|
|
|
|
cpad->convert =
|
|
gst_video_converter_new (&pad->buffer_vinfo, &tmp_info, NULL);
|
|
cpad->conversion_info = tmp_info;
|
|
|
|
if (!cpad->convert) {
|
|
GST_WARNING_OBJECT (pad, "No path found for conversion");
|
|
g_free (colorimetry);
|
|
g_free (wanted_colorimetry);
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
GST_VIDEO_INFO_WIDTH (&cpad->conversion_info) = width;
|
|
GST_VIDEO_INFO_HEIGHT (&cpad->conversion_info) = height;
|
|
}
|
|
|
|
g_free (colorimetry);
|
|
g_free (wanted_colorimetry);
|
|
}
|
|
|
|
if (cpad->alpha == 0.0) {
|
|
GST_DEBUG_OBJECT (vagg, "Pad has alpha 0.0, not converting frame");
|
|
converted_frame = NULL;
|
|
goto done;
|
|
}
|
|
|
|
frame_rect = clamp_rectangle (cpad->xpos, cpad->ypos, width, height,
|
|
GST_VIDEO_INFO_WIDTH (&vagg->info), GST_VIDEO_INFO_HEIGHT (&vagg->info));
|
|
|
|
if (frame_rect.w == 0 || frame_rect.h == 0) {
|
|
GST_DEBUG_OBJECT (vagg, "Resulting frame is zero-width or zero-height "
|
|
"(w: %i, h: %i), skipping", frame_rect.w, frame_rect.h);
|
|
converted_frame = NULL;
|
|
goto done;
|
|
}
|
|
|
|
GST_OBJECT_LOCK (vagg);
|
|
/* Check if this frame is obscured by a higher-zorder frame
|
|
* TODO: Also skip a frame if it's obscured by a combination of
|
|
* higher-zorder frames */
|
|
for (l = g_list_find (GST_ELEMENT (vagg)->sinkpads, pad)->next; l;
|
|
l = l->next) {
|
|
GstVideoRectangle frame2_rect;
|
|
GstVideoAggregatorPad *pad2 = l->data;
|
|
GstCompositorPad *cpad2 = GST_COMPOSITOR_PAD (pad2);
|
|
gint pad2_width, pad2_height;
|
|
|
|
_mixer_pad_get_output_size (comp, cpad2, GST_VIDEO_INFO_PAR_N (&vagg->info),
|
|
GST_VIDEO_INFO_PAR_D (&vagg->info), &pad2_width, &pad2_height);
|
|
|
|
/* We don't need to clamp the coords of the second rectangle */
|
|
frame2_rect.x = cpad2->xpos;
|
|
frame2_rect.y = cpad2->ypos;
|
|
/* This is effectively what set_info and the above conversion
|
|
* code do to calculate the desired width/height */
|
|
frame2_rect.w = pad2_width;
|
|
frame2_rect.h = pad2_height;
|
|
|
|
/* Check if there's a buffer to be aggregated, ensure it can't have an alpha
|
|
* channel, then check opacity and frame boundaries */
|
|
if (pad2->buffer && cpad2->alpha == 1.0 &&
|
|
!GST_VIDEO_INFO_HAS_ALPHA (&pad2->info) &&
|
|
is_rectangle_contained (frame_rect, frame2_rect)) {
|
|
frame_obscured = TRUE;
|
|
GST_DEBUG_OBJECT (pad, "%ix%i@(%i,%i) obscured by %s %ix%i@(%i,%i) "
|
|
"in output of size %ix%i; skipping frame", frame_rect.w, frame_rect.h,
|
|
frame_rect.x, frame_rect.y, GST_PAD_NAME (pad2), frame2_rect.w,
|
|
frame2_rect.h, frame2_rect.x, frame2_rect.y,
|
|
GST_VIDEO_INFO_WIDTH (&vagg->info),
|
|
GST_VIDEO_INFO_HEIGHT (&vagg->info));
|
|
break;
|
|
}
|
|
}
|
|
GST_OBJECT_UNLOCK (vagg);
|
|
|
|
if (frame_obscured) {
|
|
converted_frame = NULL;
|
|
goto done;
|
|
}
|
|
|
|
frame = g_slice_new0 (GstVideoFrame);
|
|
|
|
if (!gst_video_frame_map (frame, &pad->buffer_vinfo, pad->buffer,
|
|
GST_MAP_READ)) {
|
|
GST_WARNING_OBJECT (vagg, "Could not map input buffer");
|
|
return FALSE;
|
|
}
|
|
|
|
if (cpad->convert) {
|
|
gint converted_size;
|
|
|
|
converted_frame = g_slice_new0 (GstVideoFrame);
|
|
|
|
/* We wait until here to set the conversion infos, in case vagg->info changed */
|
|
converted_size = GST_VIDEO_INFO_SIZE (&cpad->conversion_info);
|
|
outsize = GST_VIDEO_INFO_SIZE (&vagg->info);
|
|
converted_size = converted_size > outsize ? converted_size : outsize;
|
|
converted_buf = gst_buffer_new_allocate (NULL, converted_size, ¶ms);
|
|
|
|
if (!gst_video_frame_map (converted_frame, &(cpad->conversion_info),
|
|
converted_buf, GST_MAP_READWRITE)) {
|
|
GST_WARNING_OBJECT (vagg, "Could not map converted frame");
|
|
|
|
g_slice_free (GstVideoFrame, converted_frame);
|
|
gst_video_frame_unmap (frame);
|
|
g_slice_free (GstVideoFrame, frame);
|
|
return FALSE;
|
|
}
|
|
|
|
gst_video_converter_frame (cpad->convert, frame, converted_frame);
|
|
cpad->converted_buffer = converted_buf;
|
|
gst_video_frame_unmap (frame);
|
|
g_slice_free (GstVideoFrame, frame);
|
|
} else {
|
|
converted_frame = frame;
|
|
}
|
|
|
|
done:
|
|
pad->aggregated_frame = converted_frame;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_compositor_pad_clean_frame (GstVideoAggregatorPad * pad,
|
|
GstVideoAggregator * vagg)
|
|
{
|
|
GstCompositorPad *cpad = GST_COMPOSITOR_PAD (pad);
|
|
|
|
if (pad->aggregated_frame) {
|
|
gst_video_frame_unmap (pad->aggregated_frame);
|
|
g_slice_free (GstVideoFrame, pad->aggregated_frame);
|
|
pad->aggregated_frame = NULL;
|
|
}
|
|
|
|
if (cpad->converted_buffer) {
|
|
gst_buffer_unref (cpad->converted_buffer);
|
|
cpad->converted_buffer = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_compositor_pad_finalize (GObject * object)
|
|
{
|
|
GstCompositorPad *pad = GST_COMPOSITOR_PAD (object);
|
|
|
|
if (pad->convert)
|
|
gst_video_converter_free (pad->convert);
|
|
pad->convert = NULL;
|
|
|
|
G_OBJECT_CLASS (gst_compositor_pad_parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_compositor_pad_class_init (GstCompositorPadClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = (GObjectClass *) klass;
|
|
GstVideoAggregatorPadClass *vaggpadclass =
|
|
(GstVideoAggregatorPadClass *) klass;
|
|
|
|
gobject_class->set_property = gst_compositor_pad_set_property;
|
|
gobject_class->get_property = gst_compositor_pad_get_property;
|
|
gobject_class->finalize = gst_compositor_pad_finalize;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_PAD_XPOS,
|
|
g_param_spec_int ("xpos", "X Position", "X Position of the picture",
|
|
G_MININT, G_MAXINT, DEFAULT_PAD_XPOS,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_PAD_YPOS,
|
|
g_param_spec_int ("ypos", "Y Position", "Y Position of the picture",
|
|
G_MININT, G_MAXINT, DEFAULT_PAD_YPOS,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_PAD_WIDTH,
|
|
g_param_spec_int ("width", "Width", "Width of the picture",
|
|
G_MININT, G_MAXINT, DEFAULT_PAD_WIDTH,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_PAD_HEIGHT,
|
|
g_param_spec_int ("height", "Height", "Height of the picture",
|
|
G_MININT, G_MAXINT, DEFAULT_PAD_HEIGHT,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_PAD_ALPHA,
|
|
g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0,
|
|
DEFAULT_PAD_ALPHA,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
|
|
vaggpadclass->set_info = GST_DEBUG_FUNCPTR (gst_compositor_pad_set_info);
|
|
vaggpadclass->prepare_frame =
|
|
GST_DEBUG_FUNCPTR (gst_compositor_pad_prepare_frame);
|
|
vaggpadclass->clean_frame =
|
|
GST_DEBUG_FUNCPTR (gst_compositor_pad_clean_frame);
|
|
}
|
|
|
|
static void
|
|
gst_compositor_pad_init (GstCompositorPad * compo_pad)
|
|
{
|
|
compo_pad->xpos = DEFAULT_PAD_XPOS;
|
|
compo_pad->ypos = DEFAULT_PAD_YPOS;
|
|
compo_pad->alpha = DEFAULT_PAD_ALPHA;
|
|
}
|
|
|
|
|
|
/* GstCompositor */
|
|
#define DEFAULT_BACKGROUND COMPOSITOR_BACKGROUND_CHECKER
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_BACKGROUND
|
|
};
|
|
|
|
#define GST_TYPE_COMPOSITOR_BACKGROUND (gst_compositor_background_get_type())
|
|
static GType
|
|
gst_compositor_background_get_type (void)
|
|
{
|
|
static GType compositor_background_type = 0;
|
|
|
|
static const GEnumValue compositor_background[] = {
|
|
{COMPOSITOR_BACKGROUND_CHECKER, "Checker pattern", "checker"},
|
|
{COMPOSITOR_BACKGROUND_BLACK, "Black", "black"},
|
|
{COMPOSITOR_BACKGROUND_WHITE, "White", "white"},
|
|
{COMPOSITOR_BACKGROUND_TRANSPARENT,
|
|
"Transparent Background to enable further compositing", "transparent"},
|
|
{0, NULL, NULL},
|
|
};
|
|
|
|
if (!compositor_background_type) {
|
|
compositor_background_type =
|
|
g_enum_register_static ("GstCompositorBackground",
|
|
compositor_background);
|
|
}
|
|
return compositor_background_type;
|
|
}
|
|
|
|
static void
|
|
gst_compositor_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstCompositor *self = GST_COMPOSITOR (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BACKGROUND:
|
|
g_value_set_enum (value, self->background);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_compositor_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstCompositor *self = GST_COMPOSITOR (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BACKGROUND:
|
|
self->background = g_value_get_enum (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define gst_compositor_parent_class parent_class
|
|
G_DEFINE_TYPE (GstCompositor, gst_compositor, GST_TYPE_VIDEO_AGGREGATOR);
|
|
|
|
static gboolean
|
|
set_functions (GstCompositor * self, GstVideoInfo * info)
|
|
{
|
|
gboolean ret = FALSE;
|
|
|
|
self->blend = NULL;
|
|
self->overlay = NULL;
|
|
self->fill_checker = NULL;
|
|
self->fill_color = NULL;
|
|
|
|
switch (GST_VIDEO_INFO_FORMAT (info)) {
|
|
case GST_VIDEO_FORMAT_AYUV:
|
|
self->blend = gst_compositor_blend_ayuv;
|
|
self->overlay = gst_compositor_overlay_ayuv;
|
|
self->fill_checker = gst_compositor_fill_checker_ayuv;
|
|
self->fill_color = gst_compositor_fill_color_ayuv;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_ARGB:
|
|
self->blend = gst_compositor_blend_argb;
|
|
self->overlay = gst_compositor_overlay_argb;
|
|
self->fill_checker = gst_compositor_fill_checker_argb;
|
|
self->fill_color = gst_compositor_fill_color_argb;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
self->blend = gst_compositor_blend_bgra;
|
|
self->overlay = gst_compositor_overlay_bgra;
|
|
self->fill_checker = gst_compositor_fill_checker_bgra;
|
|
self->fill_color = gst_compositor_fill_color_bgra;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_ABGR:
|
|
self->blend = gst_compositor_blend_abgr;
|
|
self->overlay = gst_compositor_overlay_abgr;
|
|
self->fill_checker = gst_compositor_fill_checker_abgr;
|
|
self->fill_color = gst_compositor_fill_color_abgr;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
self->blend = gst_compositor_blend_rgba;
|
|
self->overlay = gst_compositor_overlay_rgba;
|
|
self->fill_checker = gst_compositor_fill_checker_rgba;
|
|
self->fill_color = gst_compositor_fill_color_rgba;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_Y444:
|
|
self->blend = gst_compositor_blend_y444;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_y444;
|
|
self->fill_color = gst_compositor_fill_color_y444;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_Y42B:
|
|
self->blend = gst_compositor_blend_y42b;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_y42b;
|
|
self->fill_color = gst_compositor_fill_color_y42b;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YUY2:
|
|
self->blend = gst_compositor_blend_yuy2;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_yuy2;
|
|
self->fill_color = gst_compositor_fill_color_yuy2;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
self->blend = gst_compositor_blend_uyvy;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_uyvy;
|
|
self->fill_color = gst_compositor_fill_color_uyvy;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YVYU:
|
|
self->blend = gst_compositor_blend_yvyu;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_yvyu;
|
|
self->fill_color = gst_compositor_fill_color_yvyu;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_I420:
|
|
self->blend = gst_compositor_blend_i420;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_i420;
|
|
self->fill_color = gst_compositor_fill_color_i420;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YV12:
|
|
self->blend = gst_compositor_blend_yv12;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_yv12;
|
|
self->fill_color = gst_compositor_fill_color_yv12;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_NV12:
|
|
self->blend = gst_compositor_blend_nv12;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_nv12;
|
|
self->fill_color = gst_compositor_fill_color_nv12;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_NV21:
|
|
self->blend = gst_compositor_blend_nv21;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_nv21;
|
|
self->fill_color = gst_compositor_fill_color_nv21;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_Y41B:
|
|
self->blend = gst_compositor_blend_y41b;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_y41b;
|
|
self->fill_color = gst_compositor_fill_color_y41b;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGB:
|
|
self->blend = gst_compositor_blend_rgb;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_rgb;
|
|
self->fill_color = gst_compositor_fill_color_rgb;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGR:
|
|
self->blend = gst_compositor_blend_bgr;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_bgr;
|
|
self->fill_color = gst_compositor_fill_color_bgr;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_xRGB:
|
|
self->blend = gst_compositor_blend_xrgb;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_xrgb;
|
|
self->fill_color = gst_compositor_fill_color_xrgb;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_xBGR:
|
|
self->blend = gst_compositor_blend_xbgr;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_xbgr;
|
|
self->fill_color = gst_compositor_fill_color_xbgr;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBx:
|
|
self->blend = gst_compositor_blend_rgbx;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_rgbx;
|
|
self->fill_color = gst_compositor_fill_color_rgbx;
|
|
ret = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRx:
|
|
self->blend = gst_compositor_blend_bgrx;
|
|
self->overlay = self->blend;
|
|
self->fill_checker = gst_compositor_fill_checker_bgrx;
|
|
self->fill_color = gst_compositor_fill_color_bgrx;
|
|
ret = TRUE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstCaps *
|
|
_fixate_caps (GstVideoAggregator * vagg, GstCaps * caps)
|
|
{
|
|
GList *l;
|
|
gint best_width = -1, best_height = -1;
|
|
gint best_fps_n = -1, best_fps_d = -1;
|
|
gint par_n, par_d;
|
|
gdouble best_fps = 0.;
|
|
GstCaps *ret = NULL;
|
|
GstStructure *s;
|
|
|
|
ret = gst_caps_make_writable (caps);
|
|
|
|
/* we need this to calculate how large to make the output frame */
|
|
s = gst_caps_get_structure (ret, 0);
|
|
if (gst_structure_has_field (s, "pixel-aspect-ratio")) {
|
|
gst_structure_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1, 1);
|
|
gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d);
|
|
} else {
|
|
par_n = par_d = 1;
|
|
}
|
|
|
|
GST_OBJECT_LOCK (vagg);
|
|
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
|
|
GstVideoAggregatorPad *vaggpad = l->data;
|
|
GstCompositorPad *compositor_pad = GST_COMPOSITOR_PAD (vaggpad);
|
|
gint this_width, this_height;
|
|
gint width, height;
|
|
gint fps_n, fps_d;
|
|
gdouble cur_fps;
|
|
|
|
fps_n = GST_VIDEO_INFO_FPS_N (&vaggpad->info);
|
|
fps_d = GST_VIDEO_INFO_FPS_D (&vaggpad->info);
|
|
_mixer_pad_get_output_size (GST_COMPOSITOR (vagg), compositor_pad, par_n,
|
|
par_d, &width, &height);
|
|
|
|
if (width == 0 || height == 0)
|
|
continue;
|
|
|
|
this_width = width + MAX (compositor_pad->xpos, 0);
|
|
this_height = height + MAX (compositor_pad->ypos, 0);
|
|
|
|
if (best_width < this_width)
|
|
best_width = this_width;
|
|
if (best_height < this_height)
|
|
best_height = this_height;
|
|
|
|
if (fps_d == 0)
|
|
cur_fps = 0.0;
|
|
else
|
|
gst_util_fraction_to_double (fps_n, fps_d, &cur_fps);
|
|
|
|
if (best_fps < cur_fps) {
|
|
best_fps = cur_fps;
|
|
best_fps_n = fps_n;
|
|
best_fps_d = fps_d;
|
|
}
|
|
}
|
|
GST_OBJECT_UNLOCK (vagg);
|
|
|
|
if (best_fps_n <= 0 || best_fps_d <= 0 || best_fps == 0.0) {
|
|
best_fps_n = 25;
|
|
best_fps_d = 1;
|
|
best_fps = 25.0;
|
|
}
|
|
|
|
gst_structure_fixate_field_nearest_int (s, "width", best_width);
|
|
gst_structure_fixate_field_nearest_int (s, "height", best_height);
|
|
gst_structure_fixate_field_nearest_fraction (s, "framerate", best_fps_n,
|
|
best_fps_d);
|
|
ret = gst_caps_fixate (ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
_negotiated_caps (GstVideoAggregator * vagg, GstCaps * caps)
|
|
{
|
|
GstVideoInfo v_info;
|
|
|
|
GST_DEBUG_OBJECT (vagg, "Negotiated caps %" GST_PTR_FORMAT, caps);
|
|
|
|
if (!gst_video_info_from_caps (&v_info, caps))
|
|
return FALSE;
|
|
|
|
if (!set_functions (GST_COMPOSITOR (vagg), &v_info)) {
|
|
GST_ERROR_OBJECT (vagg, "Failed to setup vfuncs");
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_compositor_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
|
|
{
|
|
GList *l;
|
|
GstCompositor *self = GST_COMPOSITOR (vagg);
|
|
BlendFunction composite;
|
|
GstVideoFrame out_frame, *outframe;
|
|
|
|
if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf, GST_MAP_WRITE)) {
|
|
GST_WARNING_OBJECT (vagg, "Could not map output buffer");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
outframe = &out_frame;
|
|
/* default to blending */
|
|
composite = self->blend;
|
|
/* TODO: If the frames to be composited completely obscure the background,
|
|
* don't bother drawing the background at all. */
|
|
switch (self->background) {
|
|
case COMPOSITOR_BACKGROUND_CHECKER:
|
|
self->fill_checker (outframe);
|
|
break;
|
|
case COMPOSITOR_BACKGROUND_BLACK:
|
|
self->fill_color (outframe, 16, 128, 128);
|
|
break;
|
|
case COMPOSITOR_BACKGROUND_WHITE:
|
|
self->fill_color (outframe, 240, 128, 128);
|
|
break;
|
|
case COMPOSITOR_BACKGROUND_TRANSPARENT:
|
|
{
|
|
guint i, plane, num_planes, height;
|
|
|
|
num_planes = GST_VIDEO_FRAME_N_PLANES (outframe);
|
|
for (plane = 0; plane < num_planes; ++plane) {
|
|
guint8 *pdata;
|
|
gsize rowsize, plane_stride;
|
|
|
|
pdata = GST_VIDEO_FRAME_PLANE_DATA (outframe, plane);
|
|
plane_stride = GST_VIDEO_FRAME_PLANE_STRIDE (outframe, plane);
|
|
rowsize = GST_VIDEO_FRAME_COMP_WIDTH (outframe, plane)
|
|
* GST_VIDEO_FRAME_COMP_PSTRIDE (outframe, plane);
|
|
height = GST_VIDEO_FRAME_COMP_HEIGHT (outframe, plane);
|
|
for (i = 0; i < height; ++i) {
|
|
memset (pdata, 0, rowsize);
|
|
pdata += plane_stride;
|
|
}
|
|
}
|
|
|
|
/* use overlay to keep background transparent */
|
|
composite = self->overlay;
|
|
break;
|
|
}
|
|
}
|
|
|
|
GST_OBJECT_LOCK (vagg);
|
|
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
|
|
GstVideoAggregatorPad *pad = l->data;
|
|
GstCompositorPad *compo_pad = GST_COMPOSITOR_PAD (pad);
|
|
|
|
if (pad->aggregated_frame != NULL) {
|
|
composite (pad->aggregated_frame, compo_pad->xpos, compo_pad->ypos,
|
|
compo_pad->alpha, outframe);
|
|
}
|
|
}
|
|
GST_OBJECT_UNLOCK (vagg);
|
|
|
|
gst_video_frame_unmap (outframe);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gboolean
|
|
_sink_query (GstAggregator * agg, GstAggregatorPad * bpad, GstQuery * query)
|
|
{
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_ALLOCATION:{
|
|
GstCaps *caps;
|
|
GstVideoInfo info;
|
|
GstBufferPool *pool;
|
|
guint size;
|
|
GstStructure *structure;
|
|
|
|
gst_query_parse_allocation (query, &caps, NULL);
|
|
|
|
if (caps == NULL)
|
|
return FALSE;
|
|
|
|
if (!gst_video_info_from_caps (&info, caps))
|
|
return FALSE;
|
|
|
|
size = GST_VIDEO_INFO_SIZE (&info);
|
|
|
|
pool = gst_video_buffer_pool_new ();
|
|
|
|
structure = gst_buffer_pool_get_config (pool);
|
|
gst_buffer_pool_config_set_params (structure, caps, size, 0, 0);
|
|
|
|
if (!gst_buffer_pool_set_config (pool, structure)) {
|
|
gst_object_unref (pool);
|
|
return FALSE;
|
|
}
|
|
|
|
gst_query_add_allocation_pool (query, pool, size, 0, 0);
|
|
gst_object_unref (pool);
|
|
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
|
|
|
|
return TRUE;
|
|
}
|
|
default:
|
|
return GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
|
|
}
|
|
}
|
|
|
|
/* GObject boilerplate */
|
|
static void
|
|
gst_compositor_class_init (GstCompositorClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = (GObjectClass *) klass;
|
|
GstElementClass *gstelement_class = (GstElementClass *) klass;
|
|
GstVideoAggregatorClass *videoaggregator_class =
|
|
(GstVideoAggregatorClass *) klass;
|
|
GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
|
|
|
|
gobject_class->get_property = gst_compositor_get_property;
|
|
gobject_class->set_property = gst_compositor_set_property;
|
|
|
|
agg_class->sinkpads_type = GST_TYPE_COMPOSITOR_PAD;
|
|
agg_class->sink_query = _sink_query;
|
|
videoaggregator_class->fixate_caps = _fixate_caps;
|
|
videoaggregator_class->negotiated_caps = _negotiated_caps;
|
|
videoaggregator_class->aggregate_frames = gst_compositor_aggregate_frames;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_BACKGROUND,
|
|
g_param_spec_enum ("background", "Background", "Background type",
|
|
GST_TYPE_COMPOSITOR_BACKGROUND,
|
|
DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
|
|
gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
|
|
|
|
gst_element_class_set_static_metadata (gstelement_class, "Compositor",
|
|
"Filter/Editor/Video/Compositor",
|
|
"Composite multiple video streams", "Wim Taymans <wim@fluendo.com>, "
|
|
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
|
|
}
|
|
|
|
static void
|
|
gst_compositor_init (GstCompositor * self)
|
|
{
|
|
self->background = DEFAULT_BACKGROUND;
|
|
/* initialize variables */
|
|
}
|
|
|
|
/* Element registration */
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_compositor_debug, "compositor", 0, "compositor");
|
|
|
|
gst_compositor_init_blend ();
|
|
|
|
return gst_element_register (plugin, "compositor", GST_RANK_PRIMARY + 1,
|
|
GST_TYPE_COMPOSITOR);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
compositor,
|
|
"Compositor", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
|
|
GST_PACKAGE_ORIGIN)
|