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Diffstat (limited to 'gst/gaudieffects/gstdodge.c')
| -rw-r--r-- | gst/gaudieffects/gstdodge.c | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/gst/gaudieffects/gstdodge.c b/gst/gaudieffects/gstdodge.c new file mode 100644 index 000000000..db74dec88 --- /dev/null +++ b/gst/gaudieffects/gstdodge.c @@ -0,0 +1,290 @@ +/* + * GStreamer + * Copyright (C) 2010 Luis de Bethencourt <luis@debethencourt.com> + * + * 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. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v videotestsrc ! dodge ! ffmpegcolorspace ! autovideosink + * ]| This pipeline shows the effect of dodge on a test stream + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <gst/gst.h> +#include <math.h> + +#include "gstplugin.h" +#include "gstdodge.h" + +#include <gst/video/video.h> +#include <gst/controller/gstcontroller.h> + +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 <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 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)); + + trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_dodge_set_caps); + trans_class->transform = GST_DEBUG_FUNCPTR (gst_dodge_transform); +} + +/* Initialize the new 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); + + 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_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); + 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_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; + } +} |