summaryrefslogtreecommitdiff
path: root/tools/gst-element-maker
blob: cefd64a6757629384249e43f3339b67432b9c767 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
#!/bin/sh


prefix=gst
basedir=`dirname $0`
templatedir=$basedir/element-templates

while [ "$1" ] ; do
  case $1 in
    --help)
      cat <<-EOF
Usage: element-maker [OPTIONS] ELEMENT_NAME BASE_CLASS
Create a GStreamer element that subclasses BASE_CLASS.
Options:
  --help             Print this information
  --prefix PREFIX    Use PREFIX instead of "gst"
Example: 'element-maker my_element basetransform' will create the files
  gstmyelement.c and gstmyelement.h that implement GstMyElement, a
  subclass of GstBaseTransform, as an element named myelement.
EOF
      exit 0
      ;;
    --prefix)
      shift
      prefix=$1
      ;;
    -*)
      echo Unknown option: $1
      exit 1
      ;;
    *)
      if [ "$name" = "" ]; then
        name=$1
      elif [ "$class" = "" ]; then
        class=$1
      else
        echo Ignored: $1
      fi
  esac
  shift
done

if [ "$name" = "" -o "$class" = "" ] ; then
  echo "Usage: element-maker [OPTIONS] ELEMENT_NAME BASE_CLASS"
  exit 1
fi

if [ ! -f "$templatedir/$class" ] ; then
  echo "Template file for $class not found."
  exit 1
fi


PREFIX=$(echo $prefix | sed -e 's/\(.*\)/\U\1/')
NAME=$(echo $name | sed -e 's/\(.*\)/\U\1/')
Prefix=$(echo $prefix | sed -e 's/_\(.\)/\U\1/g' -e 's/^\(.\)/\U\1/')
Name=$(echo $name | sed -e 's/_\(.\)/\U\1/g' -e 's/^\(.\)/\U\1/')
name=$(echo $name | sed -e 's/\(.*\)/\L\1/')

GST_IS_REPLACE=${PREFIX}_IS_${NAME}
GST_REPLACE=${PREFIX}_${NAME}
GST_TYPE_REPLACE=${PREFIX}_TYPE_${NAME}
GstReplace=${Prefix}${Name}
gst_replace=${prefix}_${name}
gstreplace=${prefix}$(echo $name | sed -e 's/_//g')
replace=$(echo $name | sed -e 's/_//g')
if [ "${prefix}" = gst ] ; then
  prefixreplace=$replace
else
  prefixreplace=$gstreplace
fi

if [ "$REAL_NAME" = "" ] ; then
  REAL_NAME=FIXME
fi
if [ "$EMAIL_ADDRESS" = "" ] ; then
  EMAIL_ADDRESS=fixme@example.com
fi


pkg=`grep -A 10000 '^% pkg-config' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
GST_TYPE_BASE_REPLACE=`grep -A 10000 '^% TYPE_CLASS_NAME' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
GstBaseReplace=`grep -A 10000 '^% ClassName' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
pads=`grep -A 10000 '^% pads' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`

generate ()
{

cat <<-EOF
/* GStreamer
 * Copyright (C) $(date +%Y) $REAL_NAME <$EMAIL_ADDRESS>
 *
 * 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 Street, Suite 500,
 * Boston, MA 02110-1335, USA.
 */
EOF

cat <<-EOF
/**
 * SECTION:element-$gstreplace
 *
 * The $replace element does FIXME stuff.
 *
 * <refsect2>
 * <title>Example launch line</title>
 * |[
 * gst-launch-1.0 -v fakesrc ! $replace ! FIXME ! fakesink
 * ]|
 * FIXME Describe what the pipeline does.
 * </refsect2>
 */
EOF


cat <<EOF

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

#include <gst/gst.h>
EOF

grep -A 10000 '^% includes' $templatedir/gobject | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% includes' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF
#include "gstreplace.h"

GST_DEBUG_CATEGORY_STATIC (gst_replace_debug_category);
#define GST_CAT_DEFAULT gst_replace_debug_category

/* prototypes */

EOF

grep -A 10000 '^% prototypes' $templatedir/gobject | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% prototypes' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
for each in $pads
do
  grep -A 10000 '^% prototypes' $templatedir/$each | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
done

cat <<EOF

enum
{
  PROP_0
};

/* pad templates */

EOF

for each in $pads
do
  grep -A 10000 '^% pad-template' $templatedir/$each | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
done

cat <<EOF

/* class initialization */

G_DEFINE_TYPE_WITH_CODE (GstReplace, gst_replace, GST_TYPE_BASE_REPLACE,
  GST_DEBUG_CATEGORY_INIT (gst_replace_debug_category, "prefixreplace", 0,
  "debug category for replace element"));

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

cat <<EOF

  /* Setting up pads and setting metadata should be moved to
     base_class_init if you intend to subclass this class. */
EOF
for each in $pads
do
  grep -A 10000 '^% base-init' $templatedir/$each | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
done
cat <<EOF

  gst_element_class_set_static_metadata (GST_ELEMENT_CLASS(klass),
      "FIXME Long name", "Generic", "FIXME Description",
      "$REAL_NAME <$EMAIL_ADDRESS>");

EOF

grep -A 10000 '^% set-methods' $templatedir/gobject | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% set-methods' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1

cat <<EOF

}

static void
gst_replace_init (GstReplace *replace)
{
EOF

for each in $pads
do
  grep -A 10000 '^% instance-init' $templatedir/$each | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
done


cat <<EOF
}
EOF


grep -A 10000 '^% methods' $templatedir/gobject | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% methods' $templatedir/$class | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
for each in $pads
do
  grep -A 10000 '^% methods' $templatedir/$each | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
done


cat <<EOF

static gboolean
plugin_init (GstPlugin * plugin)
{

  /* FIXME Remember to set the rank if it's an element that is meant
     to be autoplugged by decodebin. */
  return gst_element_register (plugin, "prefixreplace", GST_RANK_NONE,
      GST_TYPE_REPLACE);
}

/* FIXME: these are normally defined by the GStreamer build system.
   If you are creating an element to be included in gst-plugins-*,
   remove these, as they're always defined.  Otherwise, edit as
   appropriate for your external plugin package. */
#ifndef VERSION
#define VERSION "0.0.FIXME"
#endif
#ifndef PACKAGE
#define PACKAGE "FIXME_package"
#endif
#ifndef PACKAGE_NAME
#define PACKAGE_NAME "FIXME_package_name"
#endif
#ifndef GST_PACKAGE_ORIGIN
#define GST_PACKAGE_ORIGIN "http://FIXME.org/"
#endif

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    replace,
    "FIXME plugin description",
    plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)

EOF


}

generate_header ()
{

cat <<-EOF
/* GStreamer
 * Copyright (C) $(date +%Y) $REAL_NAME <$EMAIL_ADDRESS>
 *
 * 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.
 */

EOF

cat <<EOF
#ifndef _GST_REPLACE_H_
#define _GST_REPLACE_H_

EOF

grep -A 10000 '^% includes' $templatedir/gobject | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
grep -A 10000 '^% includes' $templatedir/$class | 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;

EOF

for each in $pads
do
  grep -A 10000 '^% instance-members' $templatedir/$each | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
done

cat <<EOF
};

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/$gstreplace/g" \
  -e "s/prefixreplace/$prefixreplace/g" \
  -e "s/replace/$replace/g" >$gstreplace.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/$gstreplace/g" \
  -e "s/prefixreplace/$prefixreplace/g" \
  -e "s/replace/$replace/g" >$gstreplace.h

gst-indent $gstreplace.c

echo pkg is $pkg

gcc -Wall -Werror -fPIC $CPPFLAGS $(pkg-config --cflags gstreamer-1.0 $pkg) -c -o $gstreplace.o $gstreplace.c
if test $? -ne 0; then
    exit 1
fi

gcc -shared -o $gstreplace.so $gstreplace.o $(pkg-config --libs gstreamer-1.0 $pkg)
if test $? -ne 0; then
    exit 1
fi

gst-inspect-1.0 ./$gstreplace.so