gaudieffects: Adds new plugin 'gaudieffects'

Adds the new 'gaudieffects' plugin, originally found
here: http://github.com/luisbg/gaudi_effects

Contains the following video effect elements: burn, chromium, dilate,
dodge, exclusion and solarize.

Thanks to Jan Schmidt for the reviewing and refactoring

1 files changed, 290 insertions, 0 deletions

diff --git a/gst/gaudieffects/gstburn.c b/gst/gaudieffects/gstburn.c
new file mode 100644
index 000000000..691c1cc9a
--- /dev/null
+++ b/gst/gaudieffects/gstburn.c
@@ -0,0 +1,290 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Luis de Bethencourt <luis@debethencourt.com>
+ * 
+ * Burn - curve adjustment 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-burn
+ *
+ * Burn adjusts the colors of a video stream in realtime.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch -v videotestsrc ! burn ! ffmpegcolorspace ! autovideosink
+ * ]| This pipeline shows the effect of burn on a test stream
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <gst/gst.h>
+#include <math.h>
+
+#include "gstplugin.h"
+#include "gstburn.h"
+
+#include <gst/video/video.h>
+#include <gst/controller/gstcontroller.h>
+
+GST_DEBUG_CATEGORY_STATIC (gst_burn_debug);
+#define GST_CAT_DEFAULT gst_burn_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 (Gstburn, gst_burn, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
+
+static void gst_burn_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_burn_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static gboolean gst_burn_set_caps (GstBaseTransform * btrans,
+    GstCaps * incaps, GstCaps * outcaps);
+static GstFlowReturn gst_burn_transform (GstBaseTransform * btrans,
+    GstBuffer * in_buf, GstBuffer * out_buf);
+
+/* GObject vmethod implementations */
+
+static void
+gst_burn_base_init (gpointer gclass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+  gst_element_class_set_details_simple (element_class,
+      "Burn",
+      "Filter/Effect/Video",
+      "Burn adjusts 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 burn's class. */
+static void
+gst_burn_class_init (GstburnClass * klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+  GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
+
+  gobject_class->set_property = gst_burn_set_property;
+  gobject_class->get_property = gst_burn_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_burn_set_caps);
+  trans_class->transform = GST_DEBUG_FUNCPTR (gst_burn_transform);
+}
+
+/* Initialize the new element,
+ * instantiate pads and add them to element,
+ * set pad calback functions, and
+ * initialize instance structure.
+ */
+static void
+gst_burn_init (Gstburn * filter, GstburnClass * gclass)
+{
+  filter->silent = FALSE;
+}
+
+static void
+gst_burn_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  Gstburn *filter = GST_BURN (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_burn_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  Gstburn *filter = GST_BURN (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_burn_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
+    GstCaps * outcaps)
+{
+  Gstburn *filter = GST_BURN (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_burn_transform (GstBaseTransform * btrans,
+    GstBuffer * in_buf, GstBuffer * out_buf)
+{
+  Gstburn *filter = GST_BURN (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);
+
+  return GST_FLOW_OK;
+}
+
+/* Entry point to initialize the plug-in.
+ * Register the element factories and other features. */
+gboolean
+gst_burn_plugin_init (GstPlugin * burn)
+{
+  /* debug category for fltering log messages */
+  GST_DEBUG_CATEGORY_INIT (gst_burn_debug, "burn", 0, "Template burn");
+
+  return gst_element_register (burn, "burn", GST_RANK_NONE, GST_TYPE_BURN);
+}
+
+/*** 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;
+  gint adjustment = 175;
+
+  for (x = 0; x < video_area; x++) {
+    in = *src++;
+
+    red = (in >> 16) & 0xff;
+    green = (in >> 8) & 0xff;
+    blue = (in) & 0xff;
+
+    red = 256 - ((256 * (255 - red)) / (red + adjustment));
+    green = 256 - ((256 * (255 - green)) / (green + adjustment));
+    blue = 256 - ((256 * (255 - blue)) / (blue + adjustment));
+
+    red = gate_int (red, 0, 255);
+    green = gate_int (green, 0, 255);
+    blue = gate_int (blue, 0, 255);
+
+    *dest++ = (red << 16) | (green << 8) | blue;
+  }
+}