/* * GStreamer * Copyright (C) 2010 Luis de Bethencourt * * Dodge - saturation 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-dodge * * Dodge saturates the colors of a video stream in realtime. * * * Example launch line * |[ * gst-launch -v videotestsrc ! dodge ! ffmpegcolorspace ! autovideosink * ]| This pipeline shows the effect of dodge on a test stream * */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include "gstplugin.h" #include "gstdodge.h" #include GST_DEBUG_CATEGORY_STATIC (gst_dodge_debug); #define GST_CAT_DEFAULT gst_dodge_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 gint gate_int (gint value, gint min, gint max); static void transform (guint32 * src, guint32 * dest, gint video_area); /* 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 (GstDodge, gst_dodge, GstVideoFilter, GST_TYPE_VIDEO_FILTER); static void gst_dodge_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_dodge_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_dodge_set_caps (GstBaseTransform * btrans, GstCaps * incaps, GstCaps * outcaps); static GstFlowReturn gst_dodge_transform (GstBaseTransform * btrans, GstBuffer * in_buf, GstBuffer * out_buf); /* GObject vmethod implementations */ static void gst_dodge_base_init (gpointer gclass) { GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); gst_element_class_set_details_simple (element_class, "Dodge", "Filter/Effect/Video", "Dodge saturates the colors in the video signal.", "Luis de Bethencourt "); 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 dodge's class. */ static void gst_dodge_class_init (GstDodgeClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; gobject_class->set_property = gst_dodge_set_property; gobject_class->get_property = gst_dodge_get_property; g_object_class_install_property (gobject_class, PROP_SILENT, g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_dodge_set_caps); trans_class->transform = GST_DEBUG_FUNCPTR (gst_dodge_transform); } /* Initialize the element, * instantiate pads and add them to element, * set pad calback functions, and * initialize instance structure. */ static void gst_dodge_init (GstDodge * filter, GstDodgeClass * gclass) { filter->silent = FALSE; } static void gst_dodge_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstDodge *filter = GST_DODGE (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_dodge_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstDodge *filter = GST_DODGE (object); GST_OBJECT_LOCK (filter); 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; } GST_OBJECT_UNLOCK (filter); } /* GstElement vmethod implementations */ /* Handle the link with other elements. */ static gboolean gst_dodge_set_caps (GstBaseTransform * btrans, GstCaps * incaps, GstCaps * outcaps) { GstDodge *filter = GST_DODGE (btrans); GstStructure *structure; gboolean ret = TRUE; structure = gst_caps_get_structure (incaps, 0); GST_OBJECT_LOCK (filter); if (gst_structure_get_int (structure, "width", &filter->width) && gst_structure_get_int (structure, "height", &filter->height)) { ret = TRUE; } GST_OBJECT_UNLOCK (filter); return ret; } /* Actual processing. */ static GstFlowReturn gst_dodge_transform (GstBaseTransform * btrans, GstBuffer * in_buf, GstBuffer * out_buf) { GstDodge *filter = GST_DODGE (btrans); guint32 *src = (guint32 *) GST_BUFFER_DATA (in_buf); guint32 *dest = (guint32 *) GST_BUFFER_DATA (out_buf); gint video_size; video_size = filter->width * filter->height; transform (src, dest, video_size); return GST_FLOW_OK; } /* Entry point to initialize the plug-in. * Register the element factories and other features. */ gboolean gst_dodge_plugin_init (GstPlugin * dodge) { /* debug category for fltering log messages */ GST_DEBUG_CATEGORY_INIT (gst_dodge_debug, "dodge", 0, "Template dodge"); return gst_element_register (dodge, "dodge", GST_RANK_NONE, GST_TYPE_DODGE); } /*** Now the image processing work.... ***/ /* Keep the values inbounds. */ static gint gate_int (gint value, gint min, gint max) { if (value < min) { return min; } else if (value > max) { return max; } else { return value; } } /* Transform processes each frame. */ static void transform (guint32 * src, guint32 * dest, gint video_area) { guint32 in, red, green, blue; gint x; for (x = 0; x < video_area; x++) { in = *src++; red = (in >> 16) & 0xff; green = (in >> 8) & 0xff; blue = (in) & 0xff; red = (256 * red) / (256 - red); green = (256 * green) / (256 - green); blue = (256 * blue) / (256 - blue); red = gate_int (red, 0, 255); green = gate_int (green, 0, 255); blue = gate_int (blue, 0, 255); *dest++ = (red << 16) | (green << 8) | blue; } }