#!/bin/sh

class=basetransform

GST_IS_REPLACE=MY_IS_EXAMPLE
GST_REPLACE=MY_EXAMPLE
GST_TYPE_REPLACE=MY_TYPE_EXAMPLE
GstReplace=MyExample
gst_replace=my_example
gstreplace=myexample
replace=example

source=gst$class.c
pkg=`grep -A 10000 '^% pkg-config' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
GST_TYPE_BASE_REPLACE=`grep -A 10000 '^% TYPE_CLASS_NAME' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
GstBaseReplace=`grep -A 10000 '^% ClassName' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`

generate ()
{

grep -A 10000 '^% copyright' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

EOF

grep -A 10000 '^% includes' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% includes' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% includes' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF
#include "gstreplace.h"

/* prototypes */

EOF

grep -A 10000 '^% prototypes' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% prototypes' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% prototypes' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF

enum
{
  PROP_0
};

/* pad templates */

static GstStaticPadTemplate gst_replace_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("application/unknown")
    );

static GstStaticPadTemplate gst_replace_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("application/unknown")
    );

/* class initialization */

GST_BOILERPLATE (GstReplace, gst_replace, GstBaseReplace,
    GST_TYPE_BASE_REPLACE);

static void
gst_replace_base_init (gpointer g_class)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gst_replace_src_template));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gst_replace_sink_template));

  gst_element_class_set_details_simple (element_class, "FIXME",
      "Generic", "FIXME", "FIXME <fixme@example.com>");
}

static void
gst_replace_class_init (GstReplaceClass * klass)
{
EOF
grep -A 10000 '^% declare-class' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% declare-class' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% declare-class' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

echo

grep -A 10000 '^% set-methods' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% set-methods' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% set-methods' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF

}

static void
gst_replace_init (GstReplace * replace, GstReplaceClass * replace_class)
{

}
EOF


grep -A 10000 '^% methods' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% methods' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% methods' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1


cat <<EOF

static gboolean
plugin_init (GstPlugin * plugin)
{

  gst_element_register (plugin, "replace", GST_RANK_NONE,
      gst_replace_get_type ());

  return TRUE;
}

#define VERSION "0.0.FIXME"
#define PACKAGE "FIXME_package"
#define PACKAGE_NAME "FIXME_package_name"
#define PACKAGE_ORIGIN "http://FIXME.org/"

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    "replace",
    "FIXME",
    plugin_init, VERSION, "LGPL", PACKAGE_NAME, PACKAGE_ORIGIN)

EOF


}

generate_header ()
{

grep -A 10000 '^% copyright' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF
#ifndef _GST_REPLACE_H_
#define _GST_REPLACE_H_

EOF

grep -A 10000 '^% includes' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% includes' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% includes' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF

G_BEGIN_DECLS

#define GST_TYPE_REPLACE \
  (gst_replace_get_type())
#define GST_REPLACE(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_REPLACE,GstReplace))
#define GST_REPLACE_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_REPLACE,GstReplaceClass))
#define GST_IS_REPLACE(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_REPLACE))
#define GST_IS_REPLACE_CLASS(obj) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_REPLACE))

typedef struct _GstReplace GstReplace;
typedef struct _GstReplaceClass GstReplaceClass;

struct _GstReplace
{
  GstBaseReplace base_replace;

};

struct _GstReplaceClass
{
  GstBaseReplaceClass base_replace_class;
};

GType gst_replace_get_type (void);

G_END_DECLS

#endif
EOF


}


generate | sed \
  -e "s/GST_BASE_REPLACE/$GST_BASE_REPLACE/g" \
  -e "s/GST_TYPE_BASE_REPLACE/$GST_TYPE_BASE_REPLACE/g" \
  -e "s/GstBaseReplace/$GstBaseReplace/g" \
  -e "s/GST_IS_REPLACE/$GST_IS_REPLACE/g" \
  -e "s/GST_REPLACE/$GST_REPLACE/g" \
  -e "s/GST_TYPE_REPLACE/$GST_TYPE_REPLACE/g" \
  -e "s/GstReplace/$GstReplace/g" \
  -e "s/gst_replace/$gst_replace/g" \
  -e "s/gstreplace/$gstreplace/g" \
  -e "s/replace/$replace/g" >myexample.c

generate_header | sed \
  -e "s/GST_BASE_REPLACE/$GST_BASE_REPLACE/g" \
  -e "s/GST_TYPE_BASE_REPLACE/$GST_TYPE_BASE_REPLACE/g" \
  -e "s/GstBaseReplace/$GstBaseReplace/g" \
  -e "s/GST_IS_REPLACE/$GST_IS_REPLACE/g" \
  -e "s/GST_REPLACE/$GST_REPLACE/g" \
  -e "s/GST_TYPE_REPLACE/$GST_TYPE_REPLACE/g" \
  -e "s/GstReplace/$GstReplace/g" \
  -e "s/gst_replace/$gst_replace/g" \
  -e "s/gstreplace/$gstreplace/g" \
  -e "s/replace/$replace/g" >myexample.h

gst-indent myexample.c

echo pkg is $pkg

gcc -Wall $(pkg-config --cflags gstreamer-0.10 $pkg) -c -o myexample.o myexample.c
gcc -shared -o myexample.so myexample.o $(pkg-config --libs gstreamer-0.10 $pkg)