gst/smooth/gstsmooth.c - imx-gst-plugins-bad - Git at Google

 /* GStreamer
  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
  *               <2001> Wim Taymans <wim.taymans@chello.be>
  *               <2011> Stefan Sauer <ensonic@user.sf.net>
  *
  * 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., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 #include <string.h>
 #include "gstsmooth.h"
 #include <gst/video/video.h>

 /* Smooth args */

 enum
 {
   PROP_0,
   PROP_ACTIVE,
   PROP_TOLERANCE,
   PROP_FILTER_SIZE,
   PROP_LUMA_ONLY
 };

 static GstStaticPadTemplate gst_smooth_src_template =
 GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
     )
     );

 static GstStaticPadTemplate gst_smooth_sink_template =
 GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
     )
     );

 static gboolean gst_smooth_set_info (GstVideoFilter * filter, GstCaps * incaps,
     GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info);
 static GstFlowReturn gst_smooth_transform_frame (GstVideoFilter * vfilter,
     GstVideoFrame * in_frame, GstVideoFrame * out_frame);

 static void gst_smooth_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_smooth_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);

 G_DEFINE_TYPE (GstSmooth, gst_smooth, GST_TYPE_VIDEO_FILTER);

 static void
 gst_smooth_class_init (GstSmoothClass * klass)
 {
   GObjectClass *gobject_class = (GObjectClass *) klass;
   GstElementClass *gstelement_class = (GstElementClass *) klass;
   GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;

   gobject_class->set_property = gst_smooth_set_property;
   gobject_class->get_property = gst_smooth_get_property;

   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ACTIVE,
       g_param_spec_boolean ("active", "active", "process video", TRUE,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOLERANCE,
       g_param_spec_int ("tolerance",
           "tolerance", "contrast tolerance for smoothing", G_MININT,
           G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_SIZE,
       g_param_spec_int ("filter-size", "filter-size", "size of media filter",
           G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LUMA_ONLY,
       g_param_spec_boolean ("luma-only", "luma-only", "only filter luma part",
           TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   gst_element_class_add_static_pad_template (gstelement_class,
       &gst_smooth_sink_template);
   gst_element_class_add_static_pad_template (gstelement_class,
       &gst_smooth_src_template);
   gst_element_class_set_static_metadata (gstelement_class, "Smooth effect",
       "Filter/Effect/Video", "Apply a smooth filter to an image",
       "Wim Taymans <wim.taymans@chello.be>");

   vfilter_class->transform_frame =
       GST_DEBUG_FUNCPTR (gst_smooth_transform_frame);
   vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_smooth_set_info);
 }

 static gboolean
 gst_smooth_set_info (GstVideoFilter * filter, GstCaps * incaps,
     GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
 {
   GstSmooth *smooth;

   smooth = GST_SMOOTH (filter);

   smooth->width = GST_VIDEO_INFO_WIDTH (in_info);
   smooth->height = GST_VIDEO_INFO_HEIGHT (in_info);

   return TRUE;
 }

 static void
 gst_smooth_init (GstSmooth * smooth)
 {
   smooth->active = TRUE;
   smooth->tolerance = 8;
   smooth->filtersize = 3;
   smooth->luma_only = TRUE;
 }

 static void
 smooth_filter (guchar * dest, guchar * src, gint width, gint height,
     gint stride, gint dstride, gint tolerance, gint filtersize)
 {
   gint refval, aktval, upperval, lowerval, numvalues, sum;
   gint x, y, fx, fy, fy1, fy2, fx1, fx2;
   guchar *srcp = src, *destp = dest;

   fy1 = 0;
   fy2 = MIN (filtersize + 1, height) * stride;

   for (y = 0; y < height; y++) {
     if (y > (filtersize + 1))
       fy1 += stride;
     if (y < height - (filtersize + 1))
       fy2 += stride;

     for (x = 0; x < width; x++) {
       refval = *src;
       upperval = refval + tolerance;
       lowerval = refval - tolerance;

       numvalues = 1;
       sum = refval;

       fx1 = MAX (x - filtersize, 0) + fy1;
       fx2 = MIN (x + filtersize + 1, width) + fy1;

       for (fy = fy1; fy < fy2; fy += stride) {
         for (fx = fx1; fx < fx2; fx++) {
           aktval = srcp[fx];
           if ((lowerval - aktval) * (upperval - aktval) < 0) {
             numvalues++;
             sum += aktval;
           }
         }                       /*for fx */
         fx1 += stride;
         fx2 += stride;
       }                         /*for fy */

       src++;
       *dest++ = sum / numvalues;
     }

     src = srcp + stride * y;
     dest = destp + dstride * y;
   }
 }

 static GstFlowReturn
 gst_smooth_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame,
     GstVideoFrame * out_frame)
 {
   GstSmooth *smooth;

   smooth = GST_SMOOTH (vfilter);

   if (!smooth->active) {
     gst_video_frame_copy (out_frame, in_frame);
     return GST_FLOW_OK;
   }

   smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 0),
       GST_VIDEO_FRAME_COMP_DATA (in_frame, 0),
       GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 0),
       GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 0),
       GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 0),
       GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 0),
       smooth->tolerance, smooth->filtersize);
   if (!smooth->luma_only) {
     smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 1),
         GST_VIDEO_FRAME_COMP_DATA (in_frame, 1),
         GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 1),
         GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 1),
         GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 1),
         GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 1),
         smooth->tolerance, smooth->filtersize);
     smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 2),
         GST_VIDEO_FRAME_COMP_DATA (in_frame, 2),
         GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 2),
         GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 2),
         GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 2),
         GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 2),
         smooth->tolerance, smooth->filtersize);
   } else {
     gst_video_frame_copy_plane (out_frame, in_frame, 1);
     gst_video_frame_copy_plane (out_frame, in_frame, 2);
   }

   return GST_FLOW_OK;
 }

 static void
 gst_smooth_set_property (GObject * object, guint prop_id, const GValue * value,
     GParamSpec * pspec)
 {
   GstSmooth *smooth;

   g_return_if_fail (GST_IS_SMOOTH (object));
   smooth = GST_SMOOTH (object);

   switch (prop_id) {
     case PROP_ACTIVE:
       smooth->active = g_value_get_boolean (value);
       break;
     case PROP_TOLERANCE:
       smooth->tolerance = g_value_get_int (value);
       break;
     case PROP_FILTER_SIZE:
       smooth->filtersize = g_value_get_int (value);
       break;
     case PROP_LUMA_ONLY:
       smooth->luma_only = g_value_get_boolean (value);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static void
 gst_smooth_get_property (GObject * object, guint prop_id, GValue * value,
     GParamSpec * pspec)
 {
   GstSmooth *smooth;

   g_return_if_fail (GST_IS_SMOOTH (object));
   smooth = GST_SMOOTH (object);

   switch (prop_id) {
     case PROP_ACTIVE:
       g_value_set_boolean (value, smooth->active);
       break;
     case PROP_TOLERANCE:
       g_value_set_int (value, smooth->tolerance);
       break;
     case PROP_FILTER_SIZE:
       g_value_set_int (value, smooth->filtersize);
       break;
     case PROP_LUMA_ONLY:
       g_value_set_boolean (value, smooth->luma_only);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }


 static gboolean
 plugin_init (GstPlugin * plugin)
 {
   return gst_element_register (plugin, "smooth",
       GST_RANK_NONE, GST_TYPE_SMOOTH);
 }

 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
     smooth,
     "Apply a smooth filter to an image",
     plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
	/* GStreamer
	* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
	* <2001> Wim Taymans <wim.taymans@chello.be>
	* <2011> Stefan Sauer <ensonic@user.sf.net>
	*
	* 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., 51 Franklin St, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif
	#include <string.h>
	#include "gstsmooth.h"
	#include <gst/video/video.h>

	/* Smooth args */

	enum
	{
	PROP_0,
	PROP_ACTIVE,
	PROP_TOLERANCE,
	PROP_FILTER_SIZE,
	PROP_LUMA_ONLY
	};

	static GstStaticPadTemplate gst_smooth_src_template =
	GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
	)
	);

	static GstStaticPadTemplate gst_smooth_sink_template =
	GST_STATIC_PAD_TEMPLATE ("sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
	)
	);

	static gboolean gst_smooth_set_info (GstVideoFilter * filter, GstCaps * incaps,
	GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info);
	static GstFlowReturn gst_smooth_transform_frame (GstVideoFilter * vfilter,
	GstVideoFrame * in_frame, GstVideoFrame * out_frame);

	static void gst_smooth_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec);
	static void gst_smooth_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec);

	G_DEFINE_TYPE (GstSmooth, gst_smooth, GST_TYPE_VIDEO_FILTER);

	static void
	gst_smooth_class_init (GstSmoothClass * klass)
	{
	GObjectClass gobject_class = (GObjectClass ) klass;
	GstElementClass gstelement_class = (GstElementClass ) klass;
	GstVideoFilterClass vfilter_class = (GstVideoFilterClass ) klass;

	gobject_class->set_property = gst_smooth_set_property;
	gobject_class->get_property = gst_smooth_get_property;

	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ACTIVE,
	g_param_spec_boolean ("active", "active", "process video", TRUE,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOLERANCE,
	g_param_spec_int ("tolerance",
	"tolerance", "contrast tolerance for smoothing", G_MININT,
	G_MAXINT, 0, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_SIZE,
	g_param_spec_int ("filter-size", "filter-size", "size of media filter",
	G_MININT, G_MAXINT, 0, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LUMA_ONLY,
	g_param_spec_boolean ("luma-only", "luma-only", "only filter luma part",
	TRUE, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	gst_element_class_add_static_pad_template (gstelement_class,
	&gst_smooth_sink_template);
	gst_element_class_add_static_pad_template (gstelement_class,
	&gst_smooth_src_template);
	gst_element_class_set_static_metadata (gstelement_class, "Smooth effect",
	"Filter/Effect/Video", "Apply a smooth filter to an image",
	"Wim Taymans <wim.taymans@chello.be>");

	vfilter_class->transform_frame =
	GST_DEBUG_FUNCPTR (gst_smooth_transform_frame);
	vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_smooth_set_info);
	}

	static gboolean
	gst_smooth_set_info (GstVideoFilter * filter, GstCaps * incaps,
	GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
	{
	GstSmooth *smooth;

	smooth = GST_SMOOTH (filter);

	smooth->width = GST_VIDEO_INFO_WIDTH (in_info);
	smooth->height = GST_VIDEO_INFO_HEIGHT (in_info);

	return TRUE;
	}

	static void
	gst_smooth_init (GstSmooth * smooth)
	{
	smooth->active = TRUE;
	smooth->tolerance = 8;
	smooth->filtersize = 3;
	smooth->luma_only = TRUE;
	}

	static void
	smooth_filter (guchar * dest, guchar * src, gint width, gint height,
	gint stride, gint dstride, gint tolerance, gint filtersize)
	{
	gint refval, aktval, upperval, lowerval, numvalues, sum;
	gint x, y, fx, fy, fy1, fy2, fx1, fx2;
	guchar srcp = src, destp = dest;

	fy1 = 0;
	fy2 = MIN (filtersize + 1, height) * stride;

	for (y = 0; y < height; y++) {
	if (y > (filtersize + 1))
	fy1 += stride;
	if (y < height - (filtersize + 1))
	fy2 += stride;

	for (x = 0; x < width; x++) {
	refval = *src;
	upperval = refval + tolerance;
	lowerval = refval - tolerance;

	numvalues = 1;
	sum = refval;

	fx1 = MAX (x - filtersize, 0) + fy1;
	fx2 = MIN (x + filtersize + 1, width) + fy1;

	for (fy = fy1; fy < fy2; fy += stride) {
	for (fx = fx1; fx < fx2; fx++) {
	aktval = srcp[fx];
	if ((lowerval - aktval) * (upperval - aktval) < 0) {
	numvalues++;
	sum += aktval;
	}
	} /for fx /
	fx1 += stride;
	fx2 += stride;
	} /for fy /

	src++;
	*dest++ = sum / numvalues;
	}

	src = srcp + stride * y;
	dest = destp + dstride * y;
	}
	}

	static GstFlowReturn
	gst_smooth_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame,
	GstVideoFrame * out_frame)
	{
	GstSmooth *smooth;

	smooth = GST_SMOOTH (vfilter);

	if (!smooth->active) {
	gst_video_frame_copy (out_frame, in_frame);
	return GST_FLOW_OK;
	}

	smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 0),
	GST_VIDEO_FRAME_COMP_DATA (in_frame, 0),
	GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 0),
	GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 0),
	GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 0),
	GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 0),
	smooth->tolerance, smooth->filtersize);
	if (!smooth->luma_only) {
	smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 1),
	GST_VIDEO_FRAME_COMP_DATA (in_frame, 1),
	GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 1),
	GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 1),
	GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 1),
	GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 1),
	smooth->tolerance, smooth->filtersize);
	smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 2),
	GST_VIDEO_FRAME_COMP_DATA (in_frame, 2),
	GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 2),
	GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 2),
	GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 2),
	GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 2),
	smooth->tolerance, smooth->filtersize);
	} else {
	gst_video_frame_copy_plane (out_frame, in_frame, 1);
	gst_video_frame_copy_plane (out_frame, in_frame, 2);
	}

	return GST_FLOW_OK;
	}

	static void
	gst_smooth_set_property (GObject * object, guint prop_id, const GValue * value,
	GParamSpec * pspec)
	{
	GstSmooth *smooth;

	g_return_if_fail (GST_IS_SMOOTH (object));
	smooth = GST_SMOOTH (object);

	switch (prop_id) {
	case PROP_ACTIVE:
	smooth->active = g_value_get_boolean (value);
	break;
	case PROP_TOLERANCE:
	smooth->tolerance = g_value_get_int (value);
	break;
	case PROP_FILTER_SIZE:
	smooth->filtersize = g_value_get_int (value);
	break;
	case PROP_LUMA_ONLY:
	smooth->luma_only = g_value_get_boolean (value);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static void
	gst_smooth_get_property (GObject * object, guint prop_id, GValue * value,
	GParamSpec * pspec)
	{
	GstSmooth *smooth;

	g_return_if_fail (GST_IS_SMOOTH (object));
	smooth = GST_SMOOTH (object);

	switch (prop_id) {
	case PROP_ACTIVE:
	g_value_set_boolean (value, smooth->active);
	break;
	case PROP_TOLERANCE:
	g_value_set_int (value, smooth->tolerance);
	break;
	case PROP_FILTER_SIZE:
	g_value_set_int (value, smooth->filtersize);
	break;
	case PROP_LUMA_ONLY:
	g_value_set_boolean (value, smooth->luma_only);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}


	static gboolean
	plugin_init (GstPlugin * plugin)
	{
	return gst_element_register (plugin, "smooth",
	GST_RANK_NONE, GST_TYPE_SMOOTH);
	}

	GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
	GST_VERSION_MINOR,
	smooth,
	"Apply a smooth filter to an image",
	plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)