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266 lines
7.3 KiB
C
266 lines
7.3 KiB
C
/* GStreamer
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* Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* EffecTV - Realtime Digital Video Effector
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* Copyright (C) 2001-2006 FUKUCHI Kentaro
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*
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* StreakTV - afterimage effector.
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* Copyright (C) 2001-2002 FUKUCHI Kentaro
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*
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* This combines the StreakTV and BaltanTV effects, which are
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* very similar. BaltanTV is used if the feedback property is set
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* to TRUE, otherwise StreakTV is used.
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*
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* EffecTV is free software. This library is free software;
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* 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-streaktv
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*
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* StreakTV makes after images of moving objects.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch-1.0 -v videotestsrc ! streaktv ! videoconvert ! autovideosink
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* ]| This pipeline shows the effect of streaktv on a test stream.
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* </refsect2>
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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 <math.h>
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#include <string.h>
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#include "gststreak.h"
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#include "gsteffectv.h"
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#define DEFAULT_FEEDBACK FALSE
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enum
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{
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PROP_0,
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PROP_FEEDBACK
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};
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#define gst_streaktv_parent_class parent_class
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G_DEFINE_TYPE (GstStreakTV, gst_streaktv, GST_TYPE_VIDEO_FILTER);
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static GstStaticPadTemplate gst_streaktv_src_template =
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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 ("{ BGRx, RGBx, xBGR, xRGB }"))
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);
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static GstStaticPadTemplate gst_streaktv_sink_template =
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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 ("{ BGRx, RGBx, xBGR, xRGB }"))
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);
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static GstFlowReturn
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gst_streaktv_transform_frame (GstVideoFilter * vfilter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame)
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{
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GstStreakTV *filter = GST_STREAKTV (vfilter);
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guint32 *src, *dest;
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gint i, cf;
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gint video_area, width, height;
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guint32 **planetable = filter->planetable;
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gint plane = filter->plane;
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guint stride_mask, stride_shift, stride;
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src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
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dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
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width = GST_VIDEO_FRAME_WIDTH (in_frame);
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height = GST_VIDEO_FRAME_HEIGHT (in_frame);
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video_area = width * height;
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GST_OBJECT_LOCK (filter);
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if (filter->feedback) {
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stride_mask = 0xfcfcfcfc;
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stride = 8;
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stride_shift = 2;
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} else {
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stride_mask = 0xf8f8f8f8;
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stride = 4;
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stride_shift = 3;
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}
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for (i = 0; i < video_area; i++) {
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planetable[plane][i] = (src[i] & stride_mask) >> stride_shift;
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}
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cf = plane & (stride - 1);
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if (filter->feedback) {
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for (i = 0; i < video_area; i++) {
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dest[i] = planetable[cf][i]
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+ planetable[cf + stride][i]
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+ planetable[cf + stride * 2][i]
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+ planetable[cf + stride * 3][i];
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planetable[plane][i] = (dest[i] & stride_mask) >> stride_shift;
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}
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} else {
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for (i = 0; i < video_area; i++) {
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dest[i] = planetable[cf][i]
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+ planetable[cf + stride][i]
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+ planetable[cf + stride * 2][i]
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+ planetable[cf + stride * 3][i]
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+ planetable[cf + stride * 4][i]
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+ planetable[cf + stride * 5][i]
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+ planetable[cf + stride * 6][i]
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+ planetable[cf + stride * 7][i];
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}
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}
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plane++;
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filter->plane = plane & (PLANES - 1);
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GST_OBJECT_UNLOCK (filter);
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return GST_FLOW_OK;
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}
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static gboolean
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gst_streaktv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
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GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
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{
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GstStreakTV *filter = GST_STREAKTV (vfilter);
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gint i, width, height;
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width = GST_VIDEO_INFO_WIDTH (in_info);
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height = GST_VIDEO_INFO_HEIGHT (in_info);
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if (filter->planebuffer)
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g_free (filter->planebuffer);
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filter->planebuffer = g_new0 (guint32, width * height * 4 * PLANES);
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for (i = 0; i < PLANES; i++)
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filter->planetable[i] = &filter->planebuffer[width * height * i];
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return TRUE;
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}
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static gboolean
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gst_streaktv_start (GstBaseTransform * trans)
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{
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GstStreakTV *filter = GST_STREAKTV (trans);
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filter->plane = 0;
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return TRUE;
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}
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static void
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gst_streaktv_finalize (GObject * object)
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{
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GstStreakTV *filter = GST_STREAKTV (object);
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if (filter->planebuffer) {
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g_free (filter->planebuffer);
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filter->planebuffer = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_streaktv_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstStreakTV *filter = GST_STREAKTV (object);
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switch (prop_id) {
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case PROP_FEEDBACK:
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if (G_UNLIKELY (GST_STATE (filter) >= GST_STATE_PAUSED)) {
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g_warning ("Changing the \"feedback\" property only allowed "
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"in state < PLAYING");
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return;
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}
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filter->feedback = g_value_get_boolean (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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gst_streaktv_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstStreakTV *filter = GST_STREAKTV (object);
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switch (prop_id) {
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case PROP_FEEDBACK:
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g_value_set_boolean (value, filter->feedback);
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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_streaktv_class_init (GstStreakTVClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
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GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
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gobject_class->set_property = gst_streaktv_set_property;
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gobject_class->get_property = gst_streaktv_get_property;
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gobject_class->finalize = gst_streaktv_finalize;
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g_object_class_install_property (gobject_class, PROP_FEEDBACK,
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g_param_spec_boolean ("feedback", "Feedback",
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"Feedback", DEFAULT_FEEDBACK,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_set_static_metadata (gstelement_class, "StreakTV effect",
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"Filter/Effect/Video",
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"StreakTV makes after images of moving objects",
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"FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>, "
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"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_streaktv_sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_streaktv_src_template));
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trans_class->start = GST_DEBUG_FUNCPTR (gst_streaktv_start);
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vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_streaktv_set_info);
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vfilter_class->transform_frame =
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GST_DEBUG_FUNCPTR (gst_streaktv_transform_frame);
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}
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static void
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gst_streaktv_init (GstStreakTV * filter)
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{
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filter->feedback = DEFAULT_FEEDBACK;
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}
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