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Diffstat (limited to 'gst/gaudieffects/gstdilate.c')
| -rw-r--r-- | gst/gaudieffects/gstdilate.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/gst/gaudieffects/gstdilate.c b/gst/gaudieffects/gstdilate.c new file mode 100644 index 000000000..7a68ccf59 --- /dev/null +++ b/gst/gaudieffects/gstdilate.c @@ -0,0 +1,342 @@ +/* + * GStreamer + * Copyright (C) 2010 Luis de Bethencourt <luis@debethencourt.com> + * + * Dilate - dilated eye video effect. + * Based on Pete Warden's FreeFrame plugin with the same name. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Alternatively, the contents of this file may be used under the + * GNU Lesser General Public License Version 2.1 (the "LGPL"), in + * which case the following provisions apply instead of the ones + * mentioned above: + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/** + * SECTION:element-dilate + * + * Dilate adjusts the colors of a video stream in realtime. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v videotestsrc ! dilate ! ffmpegcolorspace ! autovideosink + * ]| This pipeline shows the effect of dilate on a test stream + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <gst/gst.h> +#include <math.h> + +#include "gstplugin.h" +#include "gstdilate.h" + +#include <gst/video/video.h> +#include <gst/controller/gstcontroller.h> + +GST_DEBUG_CATEGORY_STATIC (gst_dilate_debug); +#define GST_CAT_DEFAULT gst_dilate_debug + +#if G_BYTE_ORDER == G_LITTLE_ENDIAN +#define CAPS_STR GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_RGBx +#else +#define CAPS_STR GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR +#endif + +/* Filter signals and args. */ +enum +{ + LAST_SIGNAL +}; + +enum +{ + PROP_0, + PROP_SILENT +}; + +/* Initializations */ + +static void transform (guint32 * src, guint32 * dest, gint video_area, + gint width, gint height); +inline guint32 get_luminance (guint32 in); + +/* The capabilities of the inputs and outputs. */ + +static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS (CAPS_STR) + ); + +static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS (CAPS_STR) + ); + +GST_BOILERPLATE (Gstdilate, gst_dilate, GstVideoFilter, GST_TYPE_VIDEO_FILTER); + +static void gst_dilate_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_dilate_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +static gboolean gst_dilate_set_caps (GstBaseTransform * btrans, + GstCaps * incaps, GstCaps * outcaps); +static GstFlowReturn gst_dilate_transform (GstBaseTransform * btrans, + GstBuffer * in_buf, GstBuffer * out_buf); + +/* GObject vmethod implementations */ + +static void +gst_dilate_base_init (gpointer gclass) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); + + gst_element_class_set_details_simple (element_class, + "Dilate", + "Filter/Effect/Video", + "Dilate copies the brightest pixel around.", + "Luis de Bethencourt <luis@debethencourt.com>"); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&src_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&sink_factory)); +} + +/* Initialize the dilate's class. */ +static void +gst_dilate_class_init (GstdilateClass * klass) +{ + GObjectClass *gobject_class = (GObjectClass *) klass; + GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; + + gobject_class->set_property = gst_dilate_set_property; + gobject_class->get_property = gst_dilate_get_property; + + g_object_class_install_property (gobject_class, PROP_SILENT, + g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?", + FALSE, G_PARAM_READWRITE)); + + trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_dilate_set_caps); + trans_class->transform = GST_DEBUG_FUNCPTR (gst_dilate_transform); +} + +/* Initialize the new element, + * instantiate pads and add them to element, + * set pad calback functions, and + * initialize instance structure. + */ +static void +gst_dilate_init (Gstdilate * filter, GstdilateClass * gclass) +{ + filter->silent = FALSE; +} + +static void +gst_dilate_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + Gstdilate *filter = GST_DILATE (object); + + switch (prop_id) { + case PROP_SILENT: + filter->silent = g_value_get_boolean (value); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_dilate_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + Gstdilate *filter = GST_DILATE (object); + + switch (prop_id) { + case PROP_SILENT: + g_value_set_boolean (value, filter->silent); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +/* GstElement vmethod implementations */ + +/* Handle the link with other elements. */ +static gboolean +gst_dilate_set_caps (GstBaseTransform * btrans, GstCaps * incaps, + GstCaps * outcaps) +{ + Gstdilate *filter = GST_DILATE (btrans); + GstStructure *structure; + gboolean ret = TRUE; + + structure = gst_caps_get_structure (incaps, 0); + ret &= gst_structure_get_int (structure, "width", &filter->width); + ret &= gst_structure_get_int (structure, "height", &filter->height); + + return ret; +} + +/* Actual processing. */ +static GstFlowReturn +gst_dilate_transform (GstBaseTransform * btrans, + GstBuffer * in_buf, GstBuffer * out_buf) +{ + Gstdilate *filter = GST_DILATE (btrans); + gint video_size; + + guint32 *src = (guint32 *) GST_BUFFER_DATA (in_buf); + guint32 *dest = (guint32 *) GST_BUFFER_DATA (out_buf); + + video_size = filter->width * filter->height; + + transform (src, dest, video_size, filter->width, filter->height); + + return GST_FLOW_OK; +} + +/* Entry point to initialize the plug-in. + * Register the element factories and other features. */ +gboolean +gst_dilate_plugin_init (GstPlugin * dilate) +{ + /* debug category for fltering log messages */ + GST_DEBUG_CATEGORY_INIT (gst_dilate_debug, "dilate", 0, "Template dilate"); + + return gst_element_register (dilate, "dilate", GST_RANK_NONE, + GST_TYPE_DILATE); +} + +/*** Now the image processing work.... ***/ + +/* Return luminance of the color */ +inline guint32 +get_luminance (guint32 in) +{ + guint32 red, green, blue, luminance; + + red = (in >> 16) & 0xff; + green = (in >> 8) & 0xff; + blue = (in) & 0xff; + + luminance = ((90 * red) + (115 * green) + (51 * blue)); + + return luminance; +} + +/* Transform processes each frame. */ +static void +transform (guint32 * src, guint32 * dest, gint video_area, gint width, + gint height) +{ + guint32 out_luminance, down_luminance, right_luminance; + guint32 up_luminance, left_luminance; + + guint32 *src_end = src + video_area; + + while (src != src_end) { + guint32 *src_line_start = src; + guint32 *src_line_end = src + width; + guint32 *up; + guint32 *left; + guint32 *down; + guint32 *right; + + while (src != src_line_end) { + + up = src - width; + if (up < src) { + up = src; + } + + left = src - 1; + if (left < src_line_start) { + left = src; + } + + down = src + width; + if (down >= src_end) { + down = src; + } + + right = src + 1; + if (right >= src_line_end) { + right = src; + } + + *dest = *src; + out_luminance = get_luminance (*src); + + down_luminance = get_luminance (*down); + if (down_luminance > out_luminance) { + *dest = *down; + out_luminance = down_luminance; + } + + right_luminance = get_luminance (*right); + if (right_luminance > out_luminance) { + *dest = *right; + out_luminance = right_luminance; + } + + up_luminance = get_luminance (*up); + if (up_luminance > out_luminance) { + *dest = *up; + out_luminance = up_luminance; + } + + left_luminance = get_luminance (*left); + if (left_luminance > out_luminance) { + *dest = *left; + out_luminance = left_luminance; + } + + src += 1; + dest += 1; + } + } +} |