Ported alpha, remove alphacolor as functionality is in ffmpegcolorspace.

Original commit message from CVS:
* configure.ac:
* gst/alpha/Makefile.am:
* gst/alpha/gstalpha.c: (gst_alpha_class_init), (gst_alpha_init),
(gst_alpha_sink_setcaps), (gst_alpha_chain):
Ported alpha,  remove alphacolor as functionality is in
ffmpegcolorspace.

4 files changed, 27 insertions, 567 deletions

diff --git a/gst/alpha/Makefile.am b/gst/alpha/Makefile.am
index e3c51b9e..9f8e835b 100644
--- a/gst/alpha/Makefile.am
+++ b/gst/alpha/Makefile.am
@@ -1,14 +1,9 @@
 
-plugin_LTLIBRARIES = libgstalpha.la libgstalphacolor.la
+plugin_LTLIBRARIES = libgstalpha.la
 
 libgstalpha_la_SOURCES = gstalpha.c
-libgstalpha_la_CFLAGS = $(GST_CFLAGS)
+libgstalpha_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_LIBS_CFLAGS)
 libgstalpha_la_LIBADD =
 libgstalpha_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 
-libgstalphacolor_la_SOURCES = gstalphacolor.c
-libgstalphacolor_la_CFLAGS = $(GST_CFLAGS)
-libgstalphacolor_la_LIBADD =
-libgstalphacolor_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
-
 noinst_HEADERS = 
diff --git a/gst/alpha/alphacolor.vcproj b/gst/alpha/alphacolor.vcproj
deleted file mode 100644
index 7231355d..00000000
--- a/gst/alpha/alphacolor.vcproj
+++ /dev/null
@@ -1,145 +0,0 @@
-<?xml version="1.0" encoding="Windows-1252"?>
-<VisualStudioProject
-	ProjectType="Visual C++"
-	Version="7.10"
-	Name="alphacolor"
-	ProjectGUID="{979C216F-0ACF-4956-AE00-055A42D678A2}"
-	Keyword="Win32Proj">
-	<Platforms>
-		<Platform
-			Name="Win32"/>
-	</Platforms>
-	<Configurations>
-		<Configuration
-			Name="Debug|Win32"
-			OutputDirectory="../../win32/Debug"
-			IntermediateDirectory="../../win32/Debug"
-			ConfigurationType="2"
-			CharacterSet="2">
-			<Tool
-				Name="VCCLCompilerTool"
-				Optimization="0"
-				AdditionalIncludeDirectories="../../../gstreamer/win32;../../../gstreamer;../../../gstreamer/libs;../../../glib;../../../glib/glib;../../../glib/gmodule;&quot;../../gst-libs&quot;;../../../popt/include;../../../libxml2/include/libxml2"
-				PreprocessorDefinitions="WIN32;_DEBUG;_WINDOWS;_USRDLL;alphacolor_EXPORTS;HAVE_CONFIG_H;_USE_MATH_DEFINES"
-				MinimalRebuild="TRUE"
-				BasicRuntimeChecks="3"
-				RuntimeLibrary="3"
-				UsePrecompiledHeader="0"
-				WarningLevel="3"
-				Detect64BitPortabilityProblems="TRUE"
-				DebugInformationFormat="4"/>
-			<Tool
-				Name="VCCustomBuildTool"/>
-			<Tool
-				Name="VCLinkerTool"
-				AdditionalDependencies="glib-2.0.lib gmodule-2.0.lib gthread-2.0.lib gobject-2.0.lib libgstreamer.lib gstbytestream.lib iconv.lib intl.lib"
-				OutputFile="$(OutDir)/gstalphacolor.dll"
-				LinkIncremental="2"
-				AdditionalLibraryDirectories="../../../gstreamer/win32/Debug;../../../glib/glib;../../../glib/gmodule;../../../glib/gthread;../../../glib/gobject;../../../gettext/lib;../../../libiconv/lib"
-				ModuleDefinitionFile=""
-				GenerateDebugInformation="TRUE"
-				ProgramDatabaseFile="$(OutDir)/alphacolor.pdb"
-				SubSystem="2"
-				OptimizeReferences="2"
-				ImportLibrary="$(OutDir)/gstalphacolor.lib"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"
-				CommandLine="copy /Y $(TargetPath) c:\gstreamer\plugins"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-		<Configuration
-			Name="Release|Win32"
-			OutputDirectory="../../win32/Release"
-			IntermediateDirectory="../../win32/Release"
-			ConfigurationType="2"
-			CharacterSet="2">
-			<Tool
-				Name="VCCLCompilerTool"
-				AdditionalIncludeDirectories="../../../gstreamer/win32;../../../gstreamer;../../../gstreamer/libs;../../../glib;../../../glib/glib;../../../glib/gmodule;&quot;../../gst-libs&quot;;../../../popt/include;../../../libxml2/include/libxml2"
-				PreprocessorDefinitions="WIN32;NDEBUG;GST_DISABLE_GST_DEBUG;_WINDOWS;_USRDLL;alphacolor_EXPORTS;HAVE_CONFIG_H;_USE_MATH_DEFINES"
-				RuntimeLibrary="2"
-				UsePrecompiledHeader="0"
-				WarningLevel="3"
-				Detect64BitPortabilityProblems="TRUE"
-				DebugInformationFormat="3"/>
-			<Tool
-				Name="VCCustomBuildTool"/>
-			<Tool
-				Name="VCLinkerTool"
-				AdditionalDependencies="glib-2.0.lib gmodule-2.0.lib gthread-2.0.lib gobject-2.0.lib libgstreamer.lib gstbytestream.lib iconv.lib intl.lib"
-				OutputFile="$(OutDir)/gstalphacolor.dll"
-				LinkIncremental="1"
-				AdditionalLibraryDirectories="../../../gstreamer/win32/Release;../../../glib/glib;../../../glib/gmodule;../../../glib/gthread;../../../glib/gobject;../../../gettext/lib;../../../libiconv/lib"
-				ModuleDefinitionFile=""
-				GenerateDebugInformation="TRUE"
-				SubSystem="2"
-				OptimizeReferences="2"
-				EnableCOMDATFolding="2"
-				ImportLibrary="$(OutDir)/gstalphacolor.lib"
-				TargetMachine="1"/>
-			<Tool
-				Name="VCMIDLTool"/>
-			<Tool
-				Name="VCPostBuildEventTool"
-				CommandLine="copy /Y $(TargetPath) c:\gstreamer\plugins"/>
-			<Tool
-				Name="VCPreBuildEventTool"/>
-			<Tool
-				Name="VCPreLinkEventTool"/>
-			<Tool
-				Name="VCResourceCompilerTool"/>
-			<Tool
-				Name="VCWebServiceProxyGeneratorTool"/>
-			<Tool
-				Name="VCXMLDataGeneratorTool"/>
-			<Tool
-				Name="VCWebDeploymentTool"/>
-			<Tool
-				Name="VCManagedWrapperGeneratorTool"/>
-			<Tool
-				Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
-		</Configuration>
-	</Configurations>
-	<References>
-	</References>
-	<Files>
-		<Filter
-			Name="Source Files"
-			Filter="cpp;c;cxx;def;odl;idl;hpj;bat;asm;asmx"
-			UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}">
-			<File
-				RelativePath=".\gstalphacolor.c">
-			</File>
-		</Filter>
-		<Filter
-			Name="Header Files"
-			Filter="h;hpp;hxx;hm;inl;inc;xsd"
-			UniqueIdentifier="{93995380-89BD-4b04-88EB-625FBE52EBFB}">
-		</Filter>
-		<Filter
-			Name="Resource Files"
-			Filter="rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx"
-			UniqueIdentifier="{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}">
-		</Filter>
-	</Files>
-	<Globals>
-	</Globals>
-</VisualStudioProject>
diff --git a/gst/alpha/gstalpha.c b/gst/alpha/gstalpha.c
index 36bc6cc1..b052d5b2 100644
--- a/gst/alpha/gstalpha.c
+++ b/gst/alpha/gstalpha.c
@@ -156,9 +156,8 @@ static void gst_alpha_set_property (GObject * object, guint prop_id,
 static void gst_alpha_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);
 
-static GstPadLinkReturn
-gst_alpha_sink_link (GstPad * pad, const GstCaps * caps);
-static void gst_alpha_chain (GstPad * pad, GstData * _data);
+static gboolean gst_alpha_sink_setcaps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn gst_alpha_chain (GstPad * pad, GstBuffer * buffer);
 
 static GstElementStateReturn gst_alpha_change_state (GstElement * element);
 
@@ -233,6 +232,9 @@ gst_alpha_class_init (GstAlphaClass * klass)
 
   parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
 
+  gobject_class->set_property = gst_alpha_set_property;
+  gobject_class->get_property = gst_alpha_get_property;
+
   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_METHOD,
       g_param_spec_enum ("method", "Method",
           "How the alpha channels should be created", GST_TYPE_ALPHA_METHOD,
@@ -256,9 +258,6 @@ gst_alpha_class_init (GstAlphaClass * klass)
       g_param_spec_float ("noise_level", "Noise Level", "Size of noise radius",
           0.0, 64.0, DEFAULT_NOISE_LEVEL, (GParamFlags) G_PARAM_READWRITE));
 
-  gobject_class->set_property = gst_alpha_set_property;
-  gobject_class->get_property = gst_alpha_get_property;
-
   gstelement_class->change_state = gst_alpha_change_state;
 }
 
@@ -271,7 +270,7 @@ gst_alpha_init (GstAlpha * alpha)
       (&gst_alpha_sink_template), "sink");
   gst_element_add_pad (GST_ELEMENT (alpha), alpha->sinkpad);
   gst_pad_set_chain_function (alpha->sinkpad, gst_alpha_chain);
-  gst_pad_set_link_function (alpha->sinkpad, gst_alpha_sink_link);
+  gst_pad_set_setcaps_function (alpha->sinkpad, gst_alpha_sink_setcaps);
 
   alpha->srcpad =
       gst_pad_new_from_template (gst_static_pad_template_get
@@ -285,8 +284,6 @@ gst_alpha_init (GstAlpha * alpha)
   alpha->target_b = DEFAULT_TARGET_B;
   alpha->angle = DEFAULT_ANGLE;
   alpha->noise_level = DEFAULT_NOISE_LEVEL;
-
-  GST_FLAG_SET (alpha, GST_ELEMENT_EVENT_AWARE);
 }
 
 /* do we need this function? */
@@ -387,15 +384,15 @@ gst_alpha_get_property (GObject * object, guint prop_id, GValue * value,
   }
 }
 
-static GstPadLinkReturn
-gst_alpha_sink_link (GstPad * pad, const GstCaps * caps)
+static gboolean
+gst_alpha_sink_setcaps (GstPad * pad, GstCaps * caps)
 {
   GstAlpha *alpha;
   GstStructure *structure;
   gboolean ret;
   guint32 fourcc;
 
-  alpha = GST_ALPHA (gst_pad_get_parent (pad));
+  alpha = GST_ALPHA (GST_PAD_PARENT (pad));
   structure = gst_caps_get_structure (caps, 0);
 
   if (gst_structure_get_fourcc (structure, "format", &fourcc)) {
@@ -407,16 +404,16 @@ gst_alpha_sink_link (GstPad * pad, const GstCaps * caps)
         alpha->ayuv = TRUE;
         break;
       default:
-        return GST_PAD_LINK_REFUSED;
+        return FALSE;
     }
   } else {
-    return GST_PAD_LINK_REFUSED;
+    return FALSE;
   }
 
   ret = gst_structure_get_int (structure, "width", &alpha->in_width);
   ret &= gst_structure_get_int (structure, "height", &alpha->in_height);
 
-  return GST_PAD_LINK_OK;
+  return TRUE;
 }
 
 static void
@@ -791,34 +788,23 @@ gst_alpha_init_params (GstAlpha * alpha)
   alpha->kg = MIN (kgl, 127);
 }
 
-static void
-gst_alpha_chain (GstPad * pad, GstData * _data)
+static GstFlowReturn
+gst_alpha_chain (GstPad * pad, GstBuffer * buffer)
 {
-  GstBuffer *buffer;
   GstAlpha *alpha;
   GstBuffer *outbuf;
   gint new_width, new_height;
+  GstFlowReturn ret;
 
-  alpha = GST_ALPHA (gst_pad_get_parent (pad));
+  alpha = GST_ALPHA (GST_PAD_PARENT (pad));
 
-  if (GST_IS_EVENT (_data)) {
-    GstEvent *event = GST_EVENT (_data);
-
-    switch (GST_EVENT_TYPE (event)) {
-      default:
-        gst_pad_event_default (pad, event);
-        break;
-    }
-    return;
-  }
-
-  buffer = GST_BUFFER (_data);
+  GST_STREAM_LOCK (pad);
 
   new_width = alpha->in_width;
   new_height = alpha->in_height;
 
   if (new_width != alpha->out_width ||
-      new_height != alpha->out_height || !GST_PAD_CAPS (alpha->srcpad)) {
+      new_height != alpha->out_height || !GST_RPAD_CAPS (alpha->srcpad)) {
     GstCaps *newcaps;
 
     newcaps = gst_caps_copy (gst_pad_get_negotiated_caps (alpha->sinkpad));
@@ -826,10 +812,7 @@ gst_alpha_chain (GstPad * pad, GstData * _data)
         "format", GST_TYPE_FOURCC, GST_STR_FOURCC ("AYUV"),
         "width", G_TYPE_INT, new_width, "height", G_TYPE_INT, new_height, NULL);
 
-    if (!gst_pad_try_set_caps (alpha->srcpad, newcaps)) {
-      GST_ELEMENT_ERROR (alpha, CORE, NEGOTIATION, (NULL), (NULL));
-      return;
-    }
+    gst_pad_set_caps (alpha->srcpad, newcaps);
 
     alpha->out_width = new_width;
     alpha->out_height = new_height;
@@ -838,6 +821,7 @@ gst_alpha_chain (GstPad * pad, GstData * _data)
   outbuf =
       gst_buffer_new_and_alloc (ROUND_UP_2 (new_width) *
       ROUND_UP_2 (new_height) * 4);
+  gst_buffer_set_caps (outbuf, GST_RPAD_CAPS (alpha->srcpad));
   GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
   GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
 
@@ -868,7 +852,11 @@ gst_alpha_chain (GstPad * pad, GstData * _data)
 
   gst_buffer_unref (buffer);
 
-  gst_pad_push (alpha->srcpad, GST_DATA (outbuf));
+  ret = gst_pad_push (alpha->srcpad, outbuf);
+
+  GST_STREAM_UNLOCK (pad);
+
+  return ret;
 }
 
 static GstElementStateReturn
diff --git a/gst/alpha/gstalphacolor.c b/gst/alpha/gstalphacolor.c
deleted file mode 100644
index d9100bb2..00000000
--- a/gst/alpha/gstalphacolor.c
+++ /dev/null
@@ -1,378 +0,0 @@
-/* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- *
- * 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.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-#include <gst/gst.h>
-#include <gst/video/video.h>
-
-#include <string.h>
-
-#define GST_TYPE_ALPHA_COLOR \
-  (gst_alpha_color_get_type())
-#define GST_ALPHA_COLOR(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALPHA_COLOR,GstAlphaColor))
-#define GST_ALPHA_COLOR_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALPHA_COLOR,GstAlphaColorClass))
-#define GST_IS_ALPHA_COLOR(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALPHA_COLOR))
-#define GST_IS_ALPHA_COLOR_CLASS(obj) \
-  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALPHA_COLOR))
-
-typedef struct _GstAlphaColor GstAlphaColor;
-typedef struct _GstAlphaColorClass GstAlphaColorClass;
-
-struct _GstAlphaColor
-{
-  GstElement element;
-
-  /* pads */
-  GstPad *sinkpad;
-  GstPad *srcpad;
-
-  /* caps */
-  gint in_width, in_height;
-  gboolean in_rgba;
-  gint out_width, out_height;
-};
-
-struct _GstAlphaColorClass
-{
-  GstElementClass parent_class;
-};
-
-/* elementfactory information */
-static GstElementDetails gst_alpha_color_details =
-GST_ELEMENT_DETAILS ("alpha color filter",
-    "Filter/Effect/Video",
-    "converts rgb to yuv with alpha",
-    "Wim Taymans <wim@fluendo.com>");
-
-
-/* AlphaColor signals and args */
-enum
-{
-  /* FILL ME */
-  LAST_SIGNAL
-};
-
-enum
-{
-  ARG_0,
-  /* FILL ME */
-};
-
-static GstStaticPadTemplate gst_alpha_color_sink_template =
-    GST_STATIC_PAD_TEMPLATE ("sink",
-    GST_PAD_SINK,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA)
-    );
-
-static GstStaticPadTemplate gst_alpha_color_src_template =
-GST_STATIC_PAD_TEMPLATE ("src",
-    GST_PAD_SRC,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV"))
-    );
-
-
-static void gst_alpha_color_base_init (gpointer g_class);
-static void gst_alpha_color_class_init (GstAlphaColorClass * klass);
-static void gst_alpha_color_init (GstAlphaColor * alpha);
-
-static void gst_alpha_color_set_property (GObject * object, guint prop_id,
-    const GValue * value, GParamSpec * pspec);
-static void gst_alpha_color_get_property (GObject * object, guint prop_id,
-    GValue * value, GParamSpec * pspec);
-
-static GstPadLinkReturn
-gst_alpha_color_sink_link (GstPad * pad, const GstCaps * caps);
-static void gst_alpha_color_chain (GstPad * pad, GstData * _data);
-
-static GstElementStateReturn gst_alpha_color_change_state (GstElement *
-    element);
-
-
-static GstElementClass *parent_class = NULL;
-
-/* static guint gst_alpha_color_signals[LAST_SIGNAL] = { 0 }; */
-
-GType
-gst_alpha_color_get_type (void)
-{
-  static GType alpha_type = 0;
-
-  if (!alpha_type) {
-    static const GTypeInfo alpha_info = {
-      sizeof (GstAlphaColorClass),
-      gst_alpha_color_base_init,
-      NULL,
-      (GClassInitFunc) gst_alpha_color_class_init,
-      NULL,
-      NULL,
-      sizeof (GstAlphaColor),
-      0,
-      (GInstanceInitFunc) gst_alpha_color_init,
-    };
-
-    alpha_type =
-        g_type_register_static (GST_TYPE_ELEMENT, "GstAlphaColor", &alpha_info,
-        0);
-  }
-  return alpha_type;
-}
-
-static void
-gst_alpha_color_base_init (gpointer g_class)
-{
-  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
-
-  gst_element_class_set_details (element_class, &gst_alpha_color_details);
-
-  gst_element_class_add_pad_template (element_class,
-      gst_static_pad_template_get (&gst_alpha_color_sink_template));
-  gst_element_class_add_pad_template (element_class,
-      gst_static_pad_template_get (&gst_alpha_color_src_template));
-}
-static void
-gst_alpha_color_class_init (GstAlphaColorClass * klass)
-{
-  GObjectClass *gobject_class;
-  GstElementClass *gstelement_class;
-
-  gobject_class = (GObjectClass *) klass;
-  gstelement_class = (GstElementClass *) klass;
-
-  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
-
-  gobject_class->set_property = gst_alpha_color_set_property;
-  gobject_class->get_property = gst_alpha_color_get_property;
-
-  gstelement_class->change_state = gst_alpha_color_change_state;
-}
-
-static void
-gst_alpha_color_init (GstAlphaColor * alpha)
-{
-  /* create the sink and src pads */
-  alpha->sinkpad =
-      gst_pad_new_from_template (gst_static_pad_template_get
-      (&gst_alpha_color_sink_template), "sink");
-  gst_element_add_pad (GST_ELEMENT (alpha), alpha->sinkpad);
-  gst_pad_set_chain_function (alpha->sinkpad, gst_alpha_color_chain);
-  gst_pad_set_link_function (alpha->sinkpad, gst_alpha_color_sink_link);
-
-  alpha->srcpad =
-      gst_pad_new_from_template (gst_static_pad_template_get
-      (&gst_alpha_color_src_template), "src");
-  gst_element_add_pad (GST_ELEMENT (alpha), alpha->srcpad);
-
-  GST_FLAG_SET (alpha, GST_ELEMENT_EVENT_AWARE);
-}
-
-/* do we need this function? */
-static void
-gst_alpha_color_set_property (GObject * object, guint prop_id,
-    const GValue * value, GParamSpec * pspec)
-{
-  GstAlphaColor *alpha;
-
-  /* it's not null if we got it, but it might not be ours */
-  g_return_if_fail (GST_IS_ALPHA_COLOR (object));
-
-  alpha = GST_ALPHA_COLOR (object);
-
-  switch (prop_id) {
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-  }
-}
-static void
-gst_alpha_color_get_property (GObject * object, guint prop_id, GValue * value,
-    GParamSpec * pspec)
-{
-  GstAlphaColor *alpha;
-
-  /* it's not null if we got it, but it might not be ours */
-  g_return_if_fail (GST_IS_ALPHA_COLOR (object));
-
-  alpha = GST_ALPHA_COLOR (object);
-
-  switch (prop_id) {
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-  }
-}
-
-static GstPadLinkReturn
-gst_alpha_color_sink_link (GstPad * pad, const GstCaps * caps)
-{
-  GstAlphaColor *alpha;
-  GstStructure *structure;
-  gboolean ret;
-  gdouble fps;
-  gint red_mask;
-
-  alpha = GST_ALPHA_COLOR (gst_pad_get_parent (pad));
-  structure = gst_caps_get_structure (caps, 0);
-
-  ret = gst_structure_get_int (structure, "width", &alpha->in_width);
-  ret &= gst_structure_get_int (structure, "height", &alpha->in_height);
-  ret &= gst_structure_get_double (structure, "framerate", &fps);
-  ret &= gst_structure_get_int (structure, "red_mask", &red_mask);
-
-  if (!ret)
-    return GST_PAD_LINK_REFUSED;
-
-  alpha->in_rgba = TRUE;
-#if (G_BYTE_ORDER == G_BIG_ENDIAN)
-  if (red_mask != 0x000000ff)
-#else
-  if (red_mask != 0x00ff0000)
-#endif
-    alpha->in_rgba = FALSE;
-
-  caps = gst_caps_new_simple ("video/x-raw-yuv",
-      "format", GST_TYPE_FOURCC, GST_STR_FOURCC ("AYUV"),
-      "framerate", G_TYPE_DOUBLE, fps,
-      "width", G_TYPE_INT, alpha->in_width,
-      "height", G_TYPE_INT, alpha->in_height, NULL);
-
-  return gst_pad_try_set_caps (alpha->srcpad, caps);
-}
-
-static void
-transform_rgb (guint8 * data, gint size)
-{
-  guint8 y, u, v;
-
-  while (size > 0) {
-    y = data[0] * 0.299 + data[1] * 0.587 + data[2] * 0.114 + 0;
-    u = data[0] * -0.169 + data[1] * -0.332 + data[2] * 0.500 + 128;
-    v = data[0] * 0.500 + data[1] * -0.419 + data[2] * -0.0813 + 128;
-
-    data[0] = data[3];
-    data[1] = y;
-    data[2] = u;
-    data[3] = v;
-
-    data += 4;
-    size -= 4;
-  }
-}
-
-static void
-transform_bgr (guint8 * data, gint size)
-{
-  guint8 y, u, v;
-
-  while (size > 0) {
-    y = data[2] * 0.299 + data[1] * 0.587 + data[0] * 0.114 + 0;
-    u = data[2] * -0.169 + data[1] * -0.332 + data[0] * 0.500 + 128;
-    v = data[2] * 0.500 + data[1] * -0.419 + data[0] * -0.0813 + 128;
-
-    data[0] = data[3];
-    data[1] = y;
-    data[2] = u;
-    data[3] = v;
-
-    data += 4;
-    size -= 4;
-  }
-}
-
-static void
-gst_alpha_color_chain (GstPad * pad, GstData * _data)
-{
-  GstBuffer *buffer;
-  GstAlphaColor *alpha;
-  GstBuffer *outbuf;
-  gint width, height;
-
-  alpha = GST_ALPHA_COLOR (gst_pad_get_parent (pad));
-
-  if (GST_IS_EVENT (_data)) {
-    GstEvent *event = GST_EVENT (_data);
-
-    switch (GST_EVENT_TYPE (event)) {
-      default:
-        gst_pad_event_default (pad, event);
-        break;
-    }
-    return;
-  }
-
-  buffer = GST_BUFFER (_data);
-
-  width = alpha->in_width;
-  height = alpha->in_height;
-
-  outbuf = gst_buffer_copy_on_write (buffer);
-
-  if (alpha->in_rgba)
-    transform_rgb (GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
-  else
-    transform_bgr (GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
-
-  gst_pad_push (alpha->srcpad, GST_DATA (outbuf));
-}
-
-static GstElementStateReturn
-gst_alpha_color_change_state (GstElement * element)
-{
-  GstAlphaColor *alpha;
-
-  alpha = GST_ALPHA_COLOR (element);
-
-  switch (GST_STATE_TRANSITION (element)) {
-    case GST_STATE_NULL_TO_READY:
-      break;
-    case GST_STATE_READY_TO_PAUSED:
-      break;
-    case GST_STATE_PAUSED_TO_PLAYING:
-      break;
-    case GST_STATE_PLAYING_TO_PAUSED:
-      break;
-    case GST_STATE_PAUSED_TO_READY:
-      break;
-    case GST_STATE_READY_TO_NULL:
-      break;
-  }
-
-  parent_class->change_state (element);
-
-  return GST_STATE_SUCCESS;
-}
-
-static gboolean
-plugin_init (GstPlugin * plugin)
-{
-  return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
-      GST_TYPE_ALPHA_COLOR);
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
-    GST_VERSION_MINOR,
-    "alphacolor",
-    "colorspace conversion preserving the alpha channels",
-    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)