summaryrefslogtreecommitdiff
path: root/ext/xvid/gstxviddec.c
blob: 06afc14b10c35efc8a388eef8945a976cac7f167 (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
398
399
400
401
402
403
404
/* GStreamer xvid decoder plugin
 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
 *
 * 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 <string.h>
#include <xvid.h>

#include <gst/video/video.h>
#include "gstxviddec.h"

/* elementfactory information */
GstElementDetails gst_xviddec_details = {
  "Xvid decoder",
  "Codec/Video/Decoder",
  "Xvid decoder based on xvidcore",
  "Ronald Bultje <rbultje@ronald.bitfreak.net>",
};

static GstStaticPadTemplate sink_template =
GST_STATIC_PAD_TEMPLATE (
  "sink",
  GST_PAD_SINK,
  GST_PAD_ALWAYS,
  GST_STATIC_CAPS (
    "video/x-xvid, "
    "width = (int) [ 0, MAX ], "
    "height = (int) [ 0, MAX ], "
    "framerate = (double) [ 0, MAX ]"
  )
);

static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE (
  "src",
  GST_PAD_SRC,
  GST_PAD_ALWAYS,
  GST_STATIC_CAPS (
    GST_VIDEO_CAPS_YUV ("{ I420, YUY2, YV12, YVYU, UYVY }") "; "
    RGB_24_32_STATIC_CAPS (32, 0x00ff0000, 0x0000ff00, 0x000000ff) "; "
    RGB_24_32_STATIC_CAPS (32, 0xff000000, 0x00ff0000, 0x0000ff00) "; "
    RGB_24_32_STATIC_CAPS (32, 0x0000ff00, 0x00ff0000, 0xff000000) "; "
    RGB_24_32_STATIC_CAPS (32, 0x000000ff, 0x0000ff00, 0x00ff0000) "; "
    RGB_24_32_STATIC_CAPS (24, 0x0000ff, 0x00ff00, 0xff0000) "; "
    GST_VIDEO_CAPS_RGB_15 "; "
    GST_VIDEO_CAPS_RGB_16
  )
);


/* XvidDec signals and args */
enum {
  /* FILL ME */
  LAST_SIGNAL
};

enum {
  ARG_0
  /* FILL ME */
};

static void gst_xviddec_base_init    (gpointer g_class);
static void gst_xviddec_class_init   (GstXvidDecClass *klass);
static void gst_xviddec_init         (GstXvidDec      *xviddec);
static void gst_xviddec_chain        (GstPad          *pad,
                                      GstData         *data);
static GstPadLinkReturn
	    gst_xviddec_sink_link    (GstPad          *pad,
                                      const GstCaps   *vscapslist);
static GstPadLinkReturn
	    gst_xviddec_src_link     (GstPad          *pad,
                                      const GstCaps   *vscapslist);
static GstCaps *
            gst_xviddec_src_getcaps  (GstPad          *pad);
static GstElementStateReturn
	    gst_xviddec_change_state (GstElement      *element);


static GstElementClass *parent_class = NULL;
/* static guint gst_xviddec_signals[LAST_SIGNAL] = { 0 }; */


GType
gst_xviddec_get_type(void)
{
  static GType xviddec_type = 0;

  if (!xviddec_type)
  {
    static const GTypeInfo xviddec_info = {
      sizeof(GstXvidDecClass),
      gst_xviddec_base_init,
      NULL,
      (GClassInitFunc) gst_xviddec_class_init,
      NULL,
      NULL,
      sizeof(GstXvidDec),
      0,
      (GInstanceInitFunc) gst_xviddec_init,
    };
    xviddec_type = g_type_register_static(GST_TYPE_ELEMENT,
                                          "GstXvidDec",
                                          &xviddec_info, 0);
  }
  return xviddec_type;
}

static void
gst_xviddec_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 (&sink_template));
  gst_element_class_add_pad_template (element_class, 
		  gst_static_pad_template_get (&src_template));

  gst_element_class_set_details (element_class, &gst_xviddec_details);
}

static void
gst_xviddec_class_init (GstXvidDecClass *klass)
{
  GstElementClass *gstelement_class = (GstElementClass *) klass;

  parent_class = g_type_class_ref(GST_TYPE_ELEMENT);

  gstelement_class->change_state = gst_xviddec_change_state;
}


static void
gst_xviddec_init (GstXvidDec *xviddec)
{
  gst_xvid_init();

  /* create the sink pad */
  xviddec->sinkpad = gst_pad_new_from_template(
                       gst_static_pad_template_get (&sink_template),
                       "sink");
  gst_element_add_pad(GST_ELEMENT(xviddec), xviddec->sinkpad);

  gst_pad_set_chain_function(xviddec->sinkpad, gst_xviddec_chain);
  gst_pad_set_link_function(xviddec->sinkpad, gst_xviddec_sink_link);

  /* create the src pad */
  xviddec->srcpad = gst_pad_new_from_template(
                      gst_static_pad_template_get (&src_template),
                      "src");
  gst_element_add_pad(GST_ELEMENT(xviddec), xviddec->srcpad);

  gst_pad_set_getcaps_function (xviddec->srcpad, gst_xviddec_src_getcaps);
  gst_pad_set_link_function(xviddec->srcpad, gst_xviddec_src_link);

  /* size, etc. */
  xviddec->width = xviddec->height = xviddec->csp = -1;

  /* set xvid handle to NULL */
  xviddec->handle = NULL;
}


static void
gst_xviddec_unset (GstXvidDec *xviddec)
{
  /* unref this instance */
  xvid_decore(xviddec->handle, XVID_DEC_DESTROY, NULL, NULL);
  xviddec->handle = NULL;
}


static gboolean
gst_xviddec_setup (GstXvidDec *xviddec)
{
  xvid_dec_create_t xdec;
  int ret;

  /* initialise parameters, see xvid documentation */
  gst_xvid_init_struct (xdec);
  xdec.width = xviddec->width;
  xdec.height = xviddec->height;
  xdec.handle = NULL;

  if ((ret = xvid_decore(NULL, XVID_DEC_CREATE,
                         &xdec, NULL)) < 0) {
    GST_ELEMENT_ERROR (xviddec, LIBRARY, SETTINGS, NULL,
		      ("Setting parameters %dx%d@%d failed: %s (%d)",
	              xviddec->width, xviddec->height, xviddec->csp,
		      gst_xvid_error(ret), ret));
    return FALSE;
  }

  xviddec->handle = xdec.handle;

  return TRUE;
}


static void
gst_xviddec_chain (GstPad    *pad,
                   GstData *_data)
{
  GstBuffer *buf = GST_BUFFER (_data);
  GstXvidDec *xviddec = GST_XVIDDEC(GST_OBJECT_PARENT(pad));
  GstBuffer *outbuf;
  xvid_dec_frame_t xframe;
  int ret;

  g_return_if_fail(pad != NULL);
  g_return_if_fail(GST_IS_PAD(pad));

  if (!xviddec->handle) {
    GST_ELEMENT_ERROR (xviddec, CORE, NEGOTIATION, NULL,
         ("format wasn't negotiated before chain function"));
    gst_buffer_unref(buf);
    return;
  }

  outbuf = gst_buffer_new_and_alloc(xviddec->width *
                                    xviddec->height *
                                    xviddec->bpp / 8);
  GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
  GST_BUFFER_DURATION(outbuf)  = GST_BUFFER_DURATION(buf);
  GST_BUFFER_SIZE(outbuf) = xviddec->width *
                            xviddec->height *
                            xviddec->bpp / 8;

  /* decode and so ... */
  gst_xvid_init_struct (xframe);
  xframe.general = 0;
  xframe.bitstream = (void *) GST_BUFFER_DATA(buf);
  xframe.length = GST_BUFFER_SIZE(buf);
  xframe.output.csp = xviddec->csp;
  if (xviddec->width == xviddec->stride) {
    xframe.output.plane[0] = GST_BUFFER_DATA(outbuf);
    xframe.output.plane[1] = xframe.output.plane[0] + (xviddec->width * xviddec->height);
    xframe.output.plane[2] = xframe.output.plane[1] + (xviddec->width * xviddec->height / 4);
    xframe.output.stride[0] = xviddec->width;
    xframe.output.stride[1] = xviddec->width / 2;
    xframe.output.stride[2] = xviddec->width / 2;
  } else {
    xframe.output.plane[0] = GST_BUFFER_DATA(outbuf);
    xframe.output.stride[0] = xviddec->stride;
  }

  if ((ret = xvid_decore(xviddec->handle, XVID_DEC_DECODE,
                         &xframe, NULL)) < 0) {
    GST_ELEMENT_ERROR (xviddec, STREAM, DECODE, NULL,
                      ("Error decoding xvid frame: %s (%d)\n",
		      gst_xvid_error(ret), ret));
    gst_buffer_unref(buf);
    gst_buffer_unref(outbuf);
    return;
  }

  gst_pad_push(xviddec->srcpad, GST_DATA (outbuf));
  gst_buffer_unref(buf);
}

static GstCaps *
gst_xviddec_src_getcaps (GstPad *pad)
{
  GstXvidDec *xviddec = GST_XVIDDEC (gst_pad_get_parent (pad));
  GstCaps *caps;
  gint csp[] = {
    XVID_CSP_I420,
    XVID_CSP_YV12,
    XVID_CSP_YUY2,
    XVID_CSP_UYVY,
    XVID_CSP_YVYU,
    XVID_CSP_BGRA,
    XVID_CSP_ABGR,
    XVID_CSP_RGBA,
#ifdef XVID_CSP_ARGB
    XVID_CSP_ARGB,
#endif
    XVID_CSP_BGR,
    XVID_CSP_RGB555,
    XVID_CSP_RGB565,
    0
  }, i;

  if (!GST_PAD_CAPS (xviddec->sinkpad)) {
    GstPadTemplate *templ = gst_static_pad_template_get (&src_template);
    return gst_caps_copy (gst_pad_template_get_caps (templ));
  }

  caps = gst_caps_new_empty ();
  for (i = 0; csp[i] != 0; i++) {
    GstCaps *one = gst_xvid_csp_to_caps (csp[i], xviddec->width,
					 xviddec->height, xviddec->fps);
    gst_caps_append (caps, one);
  }

  return caps;
}

static GstPadLinkReturn
gst_xviddec_src_link (GstPad        *pad,
                      const GstCaps *vscaps)
{
  GstXvidDec *xviddec = GST_XVIDDEC(gst_pad_get_parent (pad));
  GstStructure *structure = gst_caps_get_structure (vscaps, 0);

  if (!GST_PAD_CAPS (xviddec->sinkpad))
    return GST_PAD_LINK_DELAYED;

  /* if there's something old around, remove it */
  if (xviddec->handle) {
    gst_xviddec_unset(xviddec);
  }
g_print ("out: %s\n", gst_caps_to_string (vscaps));
  xviddec->csp = gst_xvid_structure_to_csp (structure, xviddec->width,
					    &xviddec->stride,
					    &xviddec->bpp);

  if (xviddec->csp < 0)
    return GST_PAD_LINK_REFUSED;

  if (!gst_xviddec_setup(xviddec))
    return GST_PAD_LINK_REFUSED;;

  return GST_PAD_LINK_OK;
}

static GstPadLinkReturn
gst_xviddec_sink_link (GstPad        *pad,
                       const GstCaps *vscaps)
{
  GstXvidDec *xviddec = GST_XVIDDEC(gst_pad_get_parent (pad));
  GstStructure *structure;

  /* if there's something old around, remove it */
  if (xviddec->handle) {
    gst_xviddec_unset(xviddec);
  }

  /* if we get here, we know the input is xvid. we
   * only need to bother with the output colorspace,
   * which the src_link function takes care of. */
  structure = gst_caps_get_structure (vscaps, 0);
  gst_structure_get_int(structure, "width", &xviddec->width);
  gst_structure_get_int(structure, "height", &xviddec->height);
  gst_structure_get_double(structure, "framerate", &xviddec->fps);
g_print ("in: %dx%d\n", xviddec->width, xviddec->height);
  /* re-nego? or just await src nego? */
  if (GST_PAD_CAPS(xviddec->srcpad)) {
    GstPadLinkReturn ret;
    GstCaps *vscaps = gst_pad_get_allowed_caps (xviddec->srcpad), *new;
    gint i, csp;

    for (i = 0; i < gst_caps_get_size (vscaps); i++) {
      csp = gst_xvid_structure_to_csp (gst_caps_get_structure (vscaps, i),
				       0, NULL, NULL);
      new = gst_xvid_csp_to_caps (csp, xviddec->width, xviddec->height, xviddec->fps);
      ret = gst_pad_try_set_caps(xviddec->srcpad, new);
      if (ret != GST_PAD_LINK_REFUSED)
        return ret;
    }

    return GST_PAD_LINK_REFUSED;
  }

  return GST_PAD_LINK_OK;
}

static GstElementStateReturn
gst_xviddec_change_state (GstElement *element)
{
  GstXvidDec *xviddec = GST_XVIDDEC (element);

  switch (GST_STATE_PENDING (element)) {
    case GST_STATE_PAUSED_TO_READY:
      if (xviddec->handle) {
        gst_xviddec_unset (xviddec);
      }
      break;
    default:
      break;
  }

  if (parent_class->change_state)
    return parent_class->change_state (element);

  return GST_STATE_SUCCESS;
}