gst/gaudieffects/gstchromium.c - imx-gst-plugins-bad - Git at Google

 /*
  * GStreamer
  * Copyright (C) <2010> Luis de Bethencourt <luis@debethencourt.com>
  *
  * Chromium - burning chrome 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., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */

 /**
  * SECTION:element-chromium
  * @title: chromium
  *
  * Chromium breaks the colors of a video stream in realtime.
  *
  * ## Example launch line
  * |[
  * gst-launch-1.0 -v videotestsrc ! chromium ! videoconvert ! autovideosink
  * ]| This pipeline shows the effect of chromium on a test stream
  *
  */

 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif

 #include <math.h>
 #include <gst/gst.h>

 #include "gstplugin.h"
 #include "gstchromium.h"

 #define gst_chromium_parent_class parent_class
 G_DEFINE_TYPE (GstChromium, gst_chromium, GST_TYPE_VIDEO_FILTER);

 GST_DEBUG_CATEGORY_STATIC (gst_chromium_debug);
 #define GST_CAT_DEFAULT gst_chromium_debug

 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
 #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{  BGRx, RGBx }")
 #else
 #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{  xBGR, xRGB }")
 #endif

 /* Filter signals and args. */
 enum
 {
   LAST_SIGNAL
 };

 enum
 {
   PROP_0 = 0,
   PROP_EDGE_A,
   PROP_EDGE_B,
 };

 /* Initializations */

 #define DEFAULT_EDGE_A 200
 #define DEFAULT_EDGE_B 1

 const float pi = 3.141582f;

 gint cosTablePi = 512;
 gint cosTableTwoPi = (2 * 512);
 gint cosTableOne = 512;
 gint cosTableMask = 1023;

 gint cosTable[2 * 512];

 void setup_cos_table (void);
 static gint cos_from_table (int angle);
 static inline int abs_int (int val);
 static void transform (guint32 * src, guint32 * dest, gint video_area,
     gint edge_a, gint edge_b);

 /* The capabilities of the inputs and outputs. */

 static GstStaticPadTemplate gst_chromium_sink_template =
 GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (CAPS_STR)
     );

 static GstStaticPadTemplate gst_chromium_src_template =
 GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (CAPS_STR)
     );

 static void gst_chromium_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_chromium_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);
 static void gst_chromium_finalize (GObject * object);

 static GstFlowReturn gst_chromium_transform_frame (GstVideoFilter * vfilter,
     GstVideoFrame * in_frame, GstVideoFrame * out_frame);

 /* GObject vmethod implementations */

 /* Initialize the chromium's class. */
 static void
 gst_chromium_class_init (GstChromiumClass * klass)
 {
   GObjectClass *gobject_class = (GObjectClass *) klass;
   GstElementClass *gstelement_class = (GstElementClass *) klass;
   GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;

   gst_element_class_set_static_metadata (gstelement_class, "Chromium",
       "Filter/Effect/Video",
       "Chromium breaks the colors of the video signal.",
       "Luis de Bethencourt <luis@debethencourt.com>");

   gst_element_class_add_static_pad_template (gstelement_class,
       &gst_chromium_sink_template);
   gst_element_class_add_static_pad_template (gstelement_class,
       &gst_chromium_src_template);

   gobject_class->set_property = gst_chromium_set_property;
   gobject_class->get_property = gst_chromium_get_property;
   gobject_class->finalize = gst_chromium_finalize;

   g_object_class_install_property (gobject_class, PROP_EDGE_A,
       g_param_spec_uint ("edge-a", "Edge A",
           "First edge parameter", 0, 256, DEFAULT_EDGE_A,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));

   g_object_class_install_property (gobject_class, PROP_EDGE_B,
       g_param_spec_uint ("edge-b", "Edge B",
           "Second edge parameter", 0, 256, DEFAULT_EDGE_B,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));

   vfilter_class->transform_frame =
       GST_DEBUG_FUNCPTR (gst_chromium_transform_frame);
 }

 /* Initialize the element,
  * instantiate pads and add them to element,
  * set pad calback functions, and
  * initialize instance structure.
  */
 static void
 gst_chromium_init (GstChromium * filter)
 {
   filter->edge_a = DEFAULT_EDGE_A;
   filter->edge_b = DEFAULT_EDGE_B;

   setup_cos_table ();
 }

 static void
 gst_chromium_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
   GstChromium *filter = GST_CHROMIUM (object);

   switch (prop_id) {
     case PROP_EDGE_A:
       filter->edge_a = g_value_get_uint (value);
       break;
     case PROP_EDGE_B:
       filter->edge_b = g_value_get_uint (value);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static void
 gst_chromium_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec)
 {
   GstChromium *filter = GST_CHROMIUM (object);

   GST_OBJECT_LOCK (filter);
   switch (prop_id) {
     case PROP_EDGE_A:
       g_value_set_uint (value, filter->edge_a);
       break;
     case PROP_EDGE_B:
       g_value_set_uint (value, filter->edge_b);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
   GST_OBJECT_UNLOCK (filter);
 }

 static void
 gst_chromium_finalize (GObject * object)
 {
   G_OBJECT_CLASS (parent_class)->finalize (object);
 }

 /* GstElement vmethod implementations */

 /* Actual processing. */
 static GstFlowReturn
 gst_chromium_transform_frame (GstVideoFilter * vfilter,
     GstVideoFrame * in_frame, GstVideoFrame * out_frame)
 {
   GstChromium *filter = GST_CHROMIUM (vfilter);
   gint video_size, edge_a, edge_b;
   guint32 *src, *dest;
   GstClockTime timestamp;
   gint64 stream_time;

   src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
   dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);

   /* GstController: update the properties */
   timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer);
   stream_time =
       gst_segment_to_stream_time (&GST_BASE_TRANSFORM (filter)->segment,
       GST_FORMAT_TIME, timestamp);

   GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
       GST_TIME_ARGS (timestamp));

   if (GST_CLOCK_TIME_IS_VALID (stream_time))
     gst_object_sync_values (GST_OBJECT (filter), stream_time);

   GST_OBJECT_LOCK (filter);
   edge_a = filter->edge_a;
   edge_b = filter->edge_b;
   GST_OBJECT_UNLOCK (filter);

   video_size = GST_VIDEO_FRAME_WIDTH (in_frame) *
       GST_VIDEO_FRAME_HEIGHT (in_frame);
   transform (src, dest, video_size, edge_a, edge_b);

   return GST_FLOW_OK;
 }

 /* Entry point to initialize the plug-in.
  * Register the element factories and other features. */
 gboolean
 gst_chromium_plugin_init (GstPlugin * chromium)
 {
   /* debug category for fltering log messages */
   GST_DEBUG_CATEGORY_INIT (gst_chromium_debug, "chromium", 0,
       "Template chromium");

   return gst_element_register (chromium, "chromium", GST_RANK_NONE,
       GST_TYPE_CHROMIUM);
 }

 /*** Now the image processing work.... ***/
 /* Set up the cosine table. */
 void
 setup_cos_table (void)
 {
   int angle;

   for (angle = 0; angle < cosTableTwoPi; ++angle) {
     float angleInRadians = ((float) (angle) / cosTablePi) * pi;
     cosTable[angle] = (int) (cos (angleInRadians) * cosTableOne);
   }
 }

 /* Keep the values absolute. */
 static inline int
 abs_int (int val)
 {
   if (val > 0) {
     return val;
   } else {
     return -val;
   }
 }

 /* Cosine from Table. */
 static gint
 cos_from_table (int angle)
 {
   angle &= cosTableMask;
   return cosTable[angle];
 }

 /* Transform processes each frame. */
 static void
 transform (guint32 * src, guint32 * dest, gint video_area,
     gint edge_a, gint edge_b)
 {
   guint32 in;
   gint x, red, green, blue;

   for (x = 0; x < video_area; x++) {
     in = *src++;

     red = (in >> 16) & 0xff;
     green = (in >> 8) & 0xff;
     blue = (in) & 0xff;

     red = abs_int (cos_from_table ((red + edge_a) + ((red * edge_b) / 2)));
     green = abs_int (cos_from_table (
             (green + edge_a) + ((green * edge_b) / 2)));
     blue = abs_int (cos_from_table ((blue + edge_a) + ((blue * edge_b) / 2)));

     red = CLAMP (red, 0, 255);
     green = CLAMP (green, 0, 255);
     blue = CLAMP (blue, 0, 255);

     *dest++ = (red << 16) | (green << 8) | blue;
   }
 }
	/*
	* GStreamer
	* Copyright (C) <2010> Luis de Bethencourt <luis@debethencourt.com>
	*
	* Chromium - burning chrome 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., 51 Franklin St, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	/**
	* SECTION:element-chromium
	* @title: chromium
	*
	* Chromium breaks the colors of a video stream in realtime.
	*
	* ## Example launch line
	* \|[
	* gst-launch-1.0 -v videotestsrc ! chromium ! videoconvert ! autovideosink
	* ]\| This pipeline shows the effect of chromium on a test stream
	*
	*/

	#ifdef HAVE_CONFIG_H
	# include <config.h>
	#endif

	#include <math.h>
	#include <gst/gst.h>

	#include "gstplugin.h"
	#include "gstchromium.h"

	#define gst_chromium_parent_class parent_class
	G_DEFINE_TYPE (GstChromium, gst_chromium, GST_TYPE_VIDEO_FILTER);

	GST_DEBUG_CATEGORY_STATIC (gst_chromium_debug);
	#define GST_CAT_DEFAULT gst_chromium_debug

	#if G_BYTE_ORDER == G_LITTLE_ENDIAN
	#define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx }")
	#else
	#define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ xBGR, xRGB }")
	#endif

	/* Filter signals and args. */
	enum
	{
	LAST_SIGNAL
	};

	enum
	{
	PROP_0 = 0,
	PROP_EDGE_A,
	PROP_EDGE_B,
	};

	/* Initializations */

	#define DEFAULT_EDGE_A 200
	#define DEFAULT_EDGE_B 1

	const float pi = 3.141582f;

	gint cosTablePi = 512;
	gint cosTableTwoPi = (2 * 512);
	gint cosTableOne = 512;
	gint cosTableMask = 1023;

	gint cosTable[2 * 512];

	void setup_cos_table (void);
	static gint cos_from_table (int angle);
	static inline int abs_int (int val);
	static void transform (guint32 * src, guint32 * dest, gint video_area,
	gint edge_a, gint edge_b);

	/* The capabilities of the inputs and outputs. */

	static GstStaticPadTemplate gst_chromium_sink_template =
	GST_STATIC_PAD_TEMPLATE ("sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (CAPS_STR)
	);

	static GstStaticPadTemplate gst_chromium_src_template =
	GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (CAPS_STR)
	);

	static void gst_chromium_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec);
	static void gst_chromium_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec);
	static void gst_chromium_finalize (GObject * object);

	static GstFlowReturn gst_chromium_transform_frame (GstVideoFilter * vfilter,
	GstVideoFrame * in_frame, GstVideoFrame * out_frame);

	/* GObject vmethod implementations */

	/* Initialize the chromium's class. */
	static void
	gst_chromium_class_init (GstChromiumClass * klass)
	{
	GObjectClass gobject_class = (GObjectClass ) klass;
	GstElementClass gstelement_class = (GstElementClass ) klass;
	GstVideoFilterClass vfilter_class = (GstVideoFilterClass ) klass;

	gst_element_class_set_static_metadata (gstelement_class, "Chromium",
	"Filter/Effect/Video",
	"Chromium breaks the colors of the video signal.",
	"Luis de Bethencourt <luis@debethencourt.com>");

	gst_element_class_add_static_pad_template (gstelement_class,
	&gst_chromium_sink_template);
	gst_element_class_add_static_pad_template (gstelement_class,
	&gst_chromium_src_template);

	gobject_class->set_property = gst_chromium_set_property;
	gobject_class->get_property = gst_chromium_get_property;
	gobject_class->finalize = gst_chromium_finalize;

	g_object_class_install_property (gobject_class, PROP_EDGE_A,
	g_param_spec_uint ("edge-a", "Edge A",
	"First edge parameter", 0, 256, DEFAULT_EDGE_A,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS \| GST_PARAM_CONTROLLABLE));

	g_object_class_install_property (gobject_class, PROP_EDGE_B,
	g_param_spec_uint ("edge-b", "Edge B",
	"Second edge parameter", 0, 256, DEFAULT_EDGE_B,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS \| GST_PARAM_CONTROLLABLE));

	vfilter_class->transform_frame =
	GST_DEBUG_FUNCPTR (gst_chromium_transform_frame);
	}

	/* Initialize the element,
	* instantiate pads and add them to element,
	* set pad calback functions, and
	* initialize instance structure.
	*/
	static void
	gst_chromium_init (GstChromium * filter)
	{
	filter->edge_a = DEFAULT_EDGE_A;
	filter->edge_b = DEFAULT_EDGE_B;

	setup_cos_table ();
	}

	static void
	gst_chromium_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec)
	{
	GstChromium *filter = GST_CHROMIUM (object);

	switch (prop_id) {
	case PROP_EDGE_A:
	filter->edge_a = g_value_get_uint (value);
	break;
	case PROP_EDGE_B:
	filter->edge_b = g_value_get_uint (value);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static void
	gst_chromium_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec)
	{
	GstChromium *filter = GST_CHROMIUM (object);

	GST_OBJECT_LOCK (filter);
	switch (prop_id) {
	case PROP_EDGE_A:
	g_value_set_uint (value, filter->edge_a);
	break;
	case PROP_EDGE_B:
	g_value_set_uint (value, filter->edge_b);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	GST_OBJECT_UNLOCK (filter);
	}

	static void
	gst_chromium_finalize (GObject * object)
	{
	G_OBJECT_CLASS (parent_class)->finalize (object);
	}

	/* GstElement vmethod implementations */

	/* Actual processing. */
	static GstFlowReturn
	gst_chromium_transform_frame (GstVideoFilter * vfilter,
	GstVideoFrame * in_frame, GstVideoFrame * out_frame)
	{
	GstChromium *filter = GST_CHROMIUM (vfilter);
	gint video_size, edge_a, edge_b;
	guint32 src, dest;
	GstClockTime timestamp;
	gint64 stream_time;

	src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
	dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);

	/* GstController: update the properties */
	timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer);
	stream_time =
	gst_segment_to_stream_time (&GST_BASE_TRANSFORM (filter)->segment,
	GST_FORMAT_TIME, timestamp);

	GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
	GST_TIME_ARGS (timestamp));

	if (GST_CLOCK_TIME_IS_VALID (stream_time))
	gst_object_sync_values (GST_OBJECT (filter), stream_time);

	GST_OBJECT_LOCK (filter);
	edge_a = filter->edge_a;
	edge_b = filter->edge_b;
	GST_OBJECT_UNLOCK (filter);

	video_size = GST_VIDEO_FRAME_WIDTH (in_frame) *
	GST_VIDEO_FRAME_HEIGHT (in_frame);
	transform (src, dest, video_size, edge_a, edge_b);

	return GST_FLOW_OK;
	}

	/* Entry point to initialize the plug-in.
	* Register the element factories and other features. */
	gboolean
	gst_chromium_plugin_init (GstPlugin * chromium)
	{
	/* debug category for fltering log messages */
	GST_DEBUG_CATEGORY_INIT (gst_chromium_debug, "chromium", 0,
	"Template chromium");

	return gst_element_register (chromium, "chromium", GST_RANK_NONE,
	GST_TYPE_CHROMIUM);
	}

	/* Now the image processing work.... */
	/* Set up the cosine table. */
	void
	setup_cos_table (void)
	{
	int angle;

	for (angle = 0; angle < cosTableTwoPi; ++angle) {
	float angleInRadians = ((float) (angle) / cosTablePi) * pi;
	cosTable[angle] = (int) (cos (angleInRadians) * cosTableOne);
	}
	}

	/* Keep the values absolute. */
	static inline int
	abs_int (int val)
	{
	if (val > 0) {
	return val;
	} else {
	return -val;
	}
	}

	/* Cosine from Table. */
	static gint
	cos_from_table (int angle)
	{
	angle &= cosTableMask;
	return cosTable[angle];
	}

	/* Transform processes each frame. */
	static void
	transform (guint32 * src, guint32 * dest, gint video_area,
	gint edge_a, gint edge_b)
	{
	guint32 in;
	gint x, red, green, blue;

	for (x = 0; x < video_area; x++) {
	in = *src++;

	red = (in >> 16) & 0xff;
	green = (in >> 8) & 0xff;
	blue = (in) & 0xff;

	red = abs_int (cos_from_table ((red + edge_a) + ((red * edge_b) / 2)));
	green = abs_int (cos_from_table (
	(green + edge_a) + ((green * edge_b) / 2)));
	blue = abs_int (cos_from_table ((blue + edge_a) + ((blue * edge_b) / 2)));

	red = CLAMP (red, 0, 255);
	green = CLAMP (green, 0, 255);
	blue = CLAMP (blue, 0, 255);

	*dest++ = (red << 16) \| (green << 8) \| blue;
	}
	}