theoradec.c 42.3 KB
Newer Older
Benjamin Otte's avatar
Benjamin Otte committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
/* GStreamer
 * Copyright (C) 2004 Benjamin Otte <in7y118@public.uni-hamburg.de>
 *
 * 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.
 */

Wim Taymans's avatar
Wim Taymans committed
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
/**
 * SECTION:element-theoradec
 * @see_also: theoraenc, oggdemux
 *
 * <refsect2>
 * <para>
 * This element decodes theora streams into raw video
 * <ulink url="http://www.theora.org/">Theora</ulink> is a royalty-free
 * video codec maintained by the <ulink url="http://www.xiph.org/">Xiph.org
 * Foundation</ulink>, based on the VP3 codec.
 * </para>
 * <para>
 * </para>
 * <title>Example pipeline</title>
 * <programlisting>
 * gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! xvimagesink
 * </programlisting>
 * This example pipeline will decode an ogg stream and decodes the theora video. Refer to
 * the theoraenc example to create the ogg file.
 * </refsect2>
 *
 * Last reviewed on 2006-03-01 (0.10.4)
 */

Benjamin Otte's avatar
Benjamin Otte committed
44 45 46 47
#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

Wim Taymans's avatar
Wim Taymans committed
48
#include "gsttheoradec.h"
Benjamin Otte's avatar
Benjamin Otte committed
49 50
#include <gst/tag/tag.h>

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
51
#define GST_CAT_DEFAULT theoradec_debug
52
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
Benjamin Otte's avatar
Benjamin Otte committed
53

54 55 56 57 58 59 60 61 62
/* With libtheora-1.0beta1 the granulepos scheme was changed:
 * where earlier the granulepos refered to the index/beginning
 * of a frame, it now refers to the end, which matches the use
 * in vorbis/speex. There don't seem to be defines for the
 * theora version we're compiling against, so we'll just use
 * a run-time check for now. See theora_enc_get_ogg_packet_end_time().
 */
static gboolean use_old_granulepos;

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
63
#define THEORA_DEF_CROP         TRUE
64 65 66 67 68 69
enum
{
  ARG_0,
  ARG_CROP
};

Stefan Kost's avatar
Stefan Kost committed
70
static const GstElementDetails theora_dec_details =
j^'s avatar
j^ committed
71
GST_ELEMENT_DETAILS ("Theora video decoder",
72 73 74 75
    "Codec/Decoder/Video",
    "decode raw theora streams to raw YUV video",
    "Benjamin Otte <in7y118@public.uni-hamburg.de>, "
    "Wim Taymans <wim@fluendo.com>");
Benjamin Otte's avatar
Benjamin Otte committed
76 77

static GstStaticPadTemplate theora_dec_src_factory =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
78 79 80 81
GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/x-raw-yuv, "
82
        "format = (fourcc) I420, "
83
        "framerate = (fraction) [0/1, MAX], "
84
        "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
85
    );
Benjamin Otte's avatar
Benjamin Otte committed
86 87

static GstStaticPadTemplate theora_dec_sink_factory =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
88 89 90 91 92
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/x-theora")
    );
Benjamin Otte's avatar
Benjamin Otte committed
93 94

GST_BOILERPLATE (GstTheoraDec, gst_theora_dec, GstElement, GST_TYPE_ELEMENT);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
95

96 97 98 99 100
static void theora_dec_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);
static void theora_dec_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);

101 102
static gboolean theora_dec_sink_event (GstPad * pad, GstEvent * event);
static GstFlowReturn theora_dec_chain (GstPad * pad, GstBuffer * buffer);
103 104
static GstStateChangeReturn theora_dec_change_state (GstElement * element,
    GstStateChange transition);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
105
static gboolean theora_dec_src_event (GstPad * pad, GstEvent * event);
Wim Taymans's avatar
Wim Taymans committed
106
static gboolean theora_dec_src_query (GstPad * pad, GstQuery * query);
107 108 109 110 111 112
static gboolean theora_dec_src_convert (GstPad * pad,
    GstFormat src_format, gint64 src_value,
    GstFormat * dest_format, gint64 * dest_value);
static gboolean theora_dec_sink_convert (GstPad * pad,
    GstFormat src_format, gint64 src_value,
    GstFormat * dest_format, gint64 * dest_value);
Wim Taymans's avatar
Wim Taymans committed
113 114 115
static gboolean theora_dec_sink_query (GstPad * pad, GstQuery * query);

#if 0
116
static const GstFormat *theora_get_formats (GstPad * pad);
Wim Taymans's avatar
Wim Taymans committed
117 118
#endif
#if 0
119
static const GstEventMask *theora_get_event_masks (GstPad * pad);
Wim Taymans's avatar
Wim Taymans committed
120
#endif
121
static const GstQueryType *theora_get_query_types (GstPad * pad);
Benjamin Otte's avatar
Benjamin Otte committed
122 123 124 125 126 127


static void
gst_theora_dec_base_init (gpointer g_class)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
128 129

  gst_element_class_add_pad_template (element_class,
Benjamin Otte's avatar
Benjamin Otte committed
130 131 132 133 134 135 136
      gst_static_pad_template_get (&theora_dec_src_factory));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&theora_dec_sink_factory));
  gst_element_class_set_details (element_class, &theora_dec_details);
}

static void
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
137
gst_theora_dec_class_init (GstTheoraDecClass * klass)
Benjamin Otte's avatar
Benjamin Otte committed
138
{
139
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
Benjamin Otte's avatar
Benjamin Otte committed
140 141
  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

142 143 144 145 146 147 148 149
  gobject_class->set_property = theora_dec_set_property;
  gobject_class->get_property = theora_dec_get_property;

  g_object_class_install_property (gobject_class, ARG_CROP,
      g_param_spec_boolean ("crop", "Crop",
          "Crop the image to the visible region", THEORA_DEF_CROP,
          (GParamFlags) G_PARAM_READWRITE));

Benjamin Otte's avatar
Benjamin Otte committed
150
  gstelement_class->change_state = theora_dec_change_state;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
151 152

  GST_DEBUG_CATEGORY_INIT (theoradec_debug, "theoradec", 0, "Theora decoder");
153 154

  use_old_granulepos = (theora_version_number () <= 0x00030200);
Benjamin Otte's avatar
Benjamin Otte committed
155 156 157
}

static void
158
gst_theora_dec_init (GstTheoraDec * dec, GstTheoraDecClass * g_class)
Benjamin Otte's avatar
Benjamin Otte committed
159
{
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
160
  dec->sinkpad =
161
      gst_pad_new_from_static_template (&theora_dec_sink_factory, "sink");
Wim Taymans's avatar
Wim Taymans committed
162
  gst_pad_set_query_function (dec->sinkpad, theora_dec_sink_query);
163
  gst_pad_set_event_function (dec->sinkpad, theora_dec_sink_event);
Benjamin Otte's avatar
Benjamin Otte committed
164 165 166
  gst_pad_set_chain_function (dec->sinkpad, theora_dec_chain);
  gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
167
  dec->srcpad =
168
      gst_pad_new_from_static_template (&theora_dec_src_factory, "src");
Benjamin Otte's avatar
Benjamin Otte committed
169
  gst_pad_set_event_function (dec->srcpad, theora_dec_src_event);
170
  gst_pad_set_query_type_function (dec->srcpad, theora_get_query_types);
171
  gst_pad_set_query_function (dec->srcpad, theora_dec_src_query);
172
  gst_pad_use_fixed_caps (dec->srcpad);
173

Benjamin Otte's avatar
Benjamin Otte committed
174 175
  gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);

176
  dec->crop = THEORA_DEF_CROP;
177 178
  dec->gather = NULL;
  dec->decode = NULL;
179
  dec->queued = NULL;
Benjamin Otte's avatar
Benjamin Otte committed
180
}
181

182 183 184 185
static void
gst_theora_dec_reset (GstTheoraDec * dec)
{
  dec->need_keyframe = TRUE;
186
  dec->sent_newsegment = FALSE;
187 188
  dec->last_timestamp = -1;
  dec->granulepos = -1;
189 190
  dec->discont = TRUE;
  dec->frame_nr = -1;
191 192 193 194 195 196
  gst_segment_init (&dec->segment, GST_FORMAT_TIME);

  GST_OBJECT_LOCK (dec);
  dec->proportion = 1.0;
  dec->earliest_time = -1;
  GST_OBJECT_UNLOCK (dec);
197

198
  g_list_foreach (dec->queued, (GFunc) gst_mini_object_unref, NULL);
199 200
  g_list_free (dec->queued);
  dec->queued = NULL;
201 202 203 204 205 206
  g_list_foreach (dec->gather, (GFunc) gst_mini_object_unref, NULL);
  g_list_free (dec->gather);
  dec->gather = NULL;
  g_list_foreach (dec->decode, (GFunc) gst_mini_object_unref, NULL);
  g_list_free (dec->decode);
  dec->decode = NULL;
207 208 209 210 211

  if (dec->tags) {
    gst_tag_list_free (dec->tags);
    dec->tags = NULL;
  }
212 213
}

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
214 215 216 217 218 219
static int
_theora_ilog (unsigned int v)
{
  int ret = 0;

  while (v) {
220
    ret++;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
221
    v >>= 1;
222
  }
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
223
  return (ret);
224 225
}

226 227
/* Return the frame number (starting from zero) corresponding to this 
 * granulepos */
228 229
static gint64
_theora_granule_frame (GstTheoraDec * dec, gint64 granulepos)
230 231
{
  guint ilog;
232
  gint framenum;
233

234 235
  if (granulepos == -1)
    return -1;
236

237
  ilog = dec->granule_shift;
238

239 240
  /* granulepos is last ilog bits for counting pframes since last iframe and 
   * bits in front of that for the framenumber of the last iframe. */
241 242 243 244 245 246
  framenum = granulepos >> ilog;
  framenum += granulepos - (framenum << ilog);

  /* This is 1-based for current libtheora, 0 based for old. Fix up. */
  if (!use_old_granulepos)
    framenum -= 1;
247

248
  GST_DEBUG_OBJECT (dec, "framecount=%d, ilog=%u", framenum, ilog);
249

250
  return framenum;
251 252
}

253
/* Return the frame start time corresponding to this granulepos */
254
static GstClockTime
255
_theora_granule_start_time (GstTheoraDec * dec, gint64 granulepos)
256
{
257
  gint64 framecount;
258

259
  /* invalid granule results in invalid time */
260 261 262
  if (granulepos == -1)
    return -1;

263
  /* get framecount */
264
  framecount = _theora_granule_frame (dec, granulepos);
265 266 267 268 269 270 271 272 273 274 275 276

  return gst_util_uint64_scale_int (framecount * GST_SECOND,
      dec->info.fps_denominator, dec->info.fps_numerator);
}

static gint64
_inc_granulepos (GstTheoraDec * dec, gint64 granulepos)
{
  gint framecount;

  if (granulepos == -1)
    return -1;
277

278 279 280
  framecount = _theora_granule_frame (dec, granulepos);

  return (framecount + 1) << dec->granule_shift;
281 282
}

Wim Taymans's avatar
Wim Taymans committed
283
#if 0
284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300
static const GstFormat *
theora_get_formats (GstPad * pad)
{
  static GstFormat src_formats[] = {
    GST_FORMAT_DEFAULT,         /* frames in this case */
    GST_FORMAT_TIME,
    GST_FORMAT_BYTES,
    0
  };
  static GstFormat sink_formats[] = {
    GST_FORMAT_DEFAULT,
    GST_FORMAT_TIME,
    0
  };

  return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
}
Wim Taymans's avatar
Wim Taymans committed
301
#endif
302

Wim Taymans's avatar
Wim Taymans committed
303
#if 0
304 305 306 307 308 309 310 311 312 313
static const GstEventMask *
theora_get_event_masks (GstPad * pad)
{
  static const GstEventMask theora_src_event_masks[] = {
    {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
    {0,}
  };

  return theora_src_event_masks;
}
Wim Taymans's avatar
Wim Taymans committed
314
#endif
315 316 317 318 319 320

static const GstQueryType *
theora_get_query_types (GstPad * pad)
{
  static const GstQueryType theora_src_query_types[] = {
    GST_QUERY_POSITION,
321 322
    GST_QUERY_DURATION,
    GST_QUERY_CONVERT,
323 324 325 326 327 328 329
    0
  };

  return theora_src_query_types;
}


330
static gboolean
331 332 333
theora_dec_src_convert (GstPad * pad,
    GstFormat src_format, gint64 src_value,
    GstFormat * dest_format, gint64 * dest_value)
334
{
335 336 337 338
  gboolean res = TRUE;
  GstTheoraDec *dec;
  guint64 scale = 1;

Wim Taymans's avatar
Wim Taymans committed
339 340 341 342 343
  if (src_format == *dest_format) {
    *dest_value = src_value;
    return TRUE;
  }

344 345 346 347 348 349
  dec = GST_THEORA_DEC (gst_pad_get_parent (pad));

  /* we need the info part before we can done something */
  if (!dec->have_header)
    goto no_header;

350 351 352 353
  switch (src_format) {
    case GST_FORMAT_BYTES:
      switch (*dest_format) {
        case GST_FORMAT_DEFAULT:
354 355
          *dest_value = gst_util_uint64_scale_int (src_value, 2,
              dec->info.height * dec->info.width * 3);
356 357 358 359 360 361 362
          break;
        case GST_FORMAT_TIME:
          /* seems like a rather silly conversion, implement me if you like */
        default:
          res = FALSE;
      }
      break;
363
    case GST_FORMAT_TIME:
364 365
      switch (*dest_format) {
        case GST_FORMAT_BYTES:
366
          scale = 3 * (dec->info.width * dec->info.height) / 2;
367
        case GST_FORMAT_DEFAULT:
368
          *dest_value = scale * gst_util_uint64_scale (src_value,
369
              dec->info.fps_numerator, dec->info.fps_denominator * GST_SECOND);
370 371 372 373
          break;
        default:
          res = FALSE;
      }
374 375
      break;
    case GST_FORMAT_DEFAULT:
376 377
      switch (*dest_format) {
        case GST_FORMAT_TIME:
378
          *dest_value = gst_util_uint64_scale (src_value,
379
              GST_SECOND * dec->info.fps_denominator, dec->info.fps_numerator);
380 381
          break;
        case GST_FORMAT_BYTES:
382 383
          *dest_value = gst_util_uint64_scale_int (src_value,
              3 * dec->info.width * dec->info.height, 2);
384 385 386 387
          break;
        default:
          res = FALSE;
      }
388 389
      break;
    default:
390
      res = FALSE;
391
  }
392 393
done:
  gst_object_unref (dec);
394
  return res;
395 396 397 398 399 400 401 402

  /* ERRORS */
no_header:
  {
    GST_DEBUG_OBJECT (dec, "no header yet, cannot convert");
    res = FALSE;
    goto done;
  }
403 404
}

Benjamin Otte's avatar
Benjamin Otte committed
405
static gboolean
406 407 408
theora_dec_sink_convert (GstPad * pad,
    GstFormat src_format, gint64 src_value,
    GstFormat * dest_format, gint64 * dest_value)
Benjamin Otte's avatar
Benjamin Otte committed
409
{
410 411
  gboolean res = TRUE;
  GstTheoraDec *dec;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
412

Wim Taymans's avatar
Wim Taymans committed
413 414 415 416 417
  if (src_format == *dest_format) {
    *dest_value = src_value;
    return TRUE;
  }

418 419 420 421 422 423
  dec = GST_THEORA_DEC (gst_pad_get_parent (pad));

  /* we need the info part before we can done something */
  if (!dec->have_header)
    goto no_header;

424
  switch (src_format) {
Benjamin Otte's avatar
Benjamin Otte committed
425
    case GST_FORMAT_DEFAULT:
426 427
      switch (*dest_format) {
        case GST_FORMAT_TIME:
428
          *dest_value = _theora_granule_start_time (dec, src_value);
429 430 431 432
          break;
        default:
          res = FALSE;
      }
433
      break;
434 435 436 437
    case GST_FORMAT_TIME:
      switch (*dest_format) {
        case GST_FORMAT_DEFAULT:
        {
438
          guint rest;
439

440
          /* framecount */
441
          *dest_value = gst_util_uint64_scale (src_value,
442
              dec->info.fps_numerator, GST_SECOND * dec->info.fps_denominator);
443 444 445 446

          /* funny way of calculating granulepos in theora */
          rest = *dest_value / dec->info.keyframe_frequency_force;
          *dest_value -= rest;
447
          *dest_value <<= dec->granule_shift;
448
          *dest_value += rest;
449 450 451 452 453 454 455
          break;
        }
        default:
          res = FALSE;
          break;
      }
      break;
Benjamin Otte's avatar
Benjamin Otte committed
456
    default:
457
      res = FALSE;
Benjamin Otte's avatar
Benjamin Otte committed
458
  }
459 460
done:
  gst_object_unref (dec);
461
  return res;
462 463 464 465 466 467 468 469

  /* ERRORS */
no_header:
  {
    GST_DEBUG_OBJECT (dec, "no header yet, cannot convert");
    res = FALSE;
    goto done;
  }
Benjamin Otte's avatar
Benjamin Otte committed
470
}
471 472

static gboolean
Wim Taymans's avatar
Wim Taymans committed
473
theora_dec_src_query (GstPad * pad, GstQuery * query)
474
{
475 476
  GstTheoraDec *dec;

Wim Taymans's avatar
Wim Taymans committed
477 478
  gboolean res = FALSE;

479 480
  dec = GST_THEORA_DEC (gst_pad_get_parent (pad));

Wim Taymans's avatar
Wim Taymans committed
481 482 483
  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_POSITION:
    {
Wim Taymans's avatar
Wim Taymans committed
484
      gint64 granulepos, value;
Wim Taymans's avatar
Wim Taymans committed
485 486 487 488 489 490
      GstFormat my_format, format;
      gint64 time;

      /* we can convert a granule position to everything */
      granulepos = dec->granulepos;

491 492 493
      GST_LOG_OBJECT (dec,
          "query %p: we have current granule: %lld", query, granulepos);

Wim Taymans's avatar
Wim Taymans committed
494 495
      /* parse format */
      gst_query_parse_position (query, &format, NULL);
496

Wim Taymans's avatar
Wim Taymans committed
497 498 499 500 501 502 503 504
      /* and convert to the final format in two steps with time as the 
       * intermediate step */
      my_format = GST_FORMAT_TIME;
      if (!(res =
              theora_dec_sink_convert (dec->sinkpad, GST_FORMAT_DEFAULT,
                  granulepos, &my_format, &time)))
        goto error;

505
      time = gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, time);
506

507 508 509
      GST_LOG_OBJECT (dec,
          "query %p: our time: %" GST_TIME_FORMAT, query, GST_TIME_ARGS (time));

Wim Taymans's avatar
Wim Taymans committed
510 511 512 513
      if (!(res =
              theora_dec_src_convert (pad, my_format, time, &format, &value)))
        goto error;

Wim Taymans's avatar
Wim Taymans committed
514
      gst_query_set_position (query, format, value);
Wim Taymans's avatar
Wim Taymans committed
515 516

      GST_LOG_OBJECT (dec,
Wim Taymans's avatar
Wim Taymans committed
517
          "query %p: we return %lld (format %u)", query, value, format);
Wim Taymans's avatar
Wim Taymans committed
518 519 520

      break;
    }
Wim Taymans's avatar
Wim Taymans committed
521
    case GST_QUERY_DURATION:
522 523 524 525 526 527
    {
      GstPad *peer;

      if (!(peer = gst_pad_get_peer (dec->sinkpad)))
        goto error;

Wim Taymans's avatar
Wim Taymans committed
528
      /* forward to peer for total */
529 530 531
      res = gst_pad_query (peer, query);
      gst_object_unref (peer);
      if (!res)
Wim Taymans's avatar
Wim Taymans committed
532
        goto error;
533

Wim Taymans's avatar
Wim Taymans committed
534
      break;
535
    }
Wim Taymans's avatar
Wim Taymans committed
536 537 538 539 540 541
    case GST_QUERY_CONVERT:
    {
      GstFormat src_fmt, dest_fmt;
      gint64 src_val, dest_val;

      gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
542
      if (!(res =
Wim Taymans's avatar
Wim Taymans committed
543 544
              theora_dec_src_convert (pad, src_fmt, src_val, &dest_fmt,
                  &dest_val)))
545 546 547
        goto error;

      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
Wim Taymans's avatar
Wim Taymans committed
548 549 550
      break;
    }
    default:
551
      res = gst_pad_query_default (pad, query);
Wim Taymans's avatar
Wim Taymans committed
552
      break;
553
  }
554 555 556
done:
  gst_object_unref (dec);

557
  return res;
558

559
  /* ERRORS */
Wim Taymans's avatar
Wim Taymans committed
560
error:
561 562 563 564
  {
    GST_DEBUG_OBJECT (dec, "query failed");
    goto done;
  }
Wim Taymans's avatar
Wim Taymans committed
565 566 567 568 569 570 571 572 573 574 575 576
}

static gboolean
theora_dec_sink_query (GstPad * pad, GstQuery * query)
{
  gboolean res = FALSE;

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_CONVERT:
    {
      GstFormat src_fmt, dest_fmt;
      gint64 src_val, dest_val;
577

Wim Taymans's avatar
Wim Taymans committed
578 579 580 581 582 583 584 585 586 587
      gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
      if (!(res =
              theora_dec_sink_convert (pad, src_fmt, src_val, &dest_fmt,
                  &dest_val)))
        goto error;

      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
      break;
    }
    default:
588
      res = gst_pad_query_default (pad, query);
Wim Taymans's avatar
Wim Taymans committed
589 590
      break;
  }
591

Wim Taymans's avatar
Wim Taymans committed
592 593
error:
  return res;
594 595
}

Benjamin Otte's avatar
Benjamin Otte committed
596
static gboolean
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
597
theora_dec_src_event (GstPad * pad, GstEvent * event)
Benjamin Otte's avatar
Benjamin Otte committed
598 599 600 601
{
  gboolean res = TRUE;
  GstTheoraDec *dec;

602
  dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
Benjamin Otte's avatar
Benjamin Otte committed
603 604

  switch (GST_EVENT_TYPE (event)) {
605 606
    case GST_EVENT_SEEK:
    {
607 608
      GstFormat format, tformat;
      gdouble rate;
Scott Wheeler Wheeler's avatar
Scott Wheeler Wheeler committed
609
      GstEvent *real_seek;
610 611 612 613 614 615 616
      GstSeekFlags flags;
      GstSeekType cur_type, stop_type;
      gint64 cur, stop;
      gint64 tcur, tstop;

      gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
          &stop_type, &stop);
617
      gst_event_unref (event);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
618

619 620 621 622 623 624
      /* we have to ask our peer to seek to time here as we know
       * nothing about how to generate a granulepos from the src
       * formats or anything.
       * 
       * First bring the requested format to time 
       */
625 626
      tformat = GST_FORMAT_TIME;
      if (!(res = theora_dec_src_convert (pad, format, cur, &tformat, &tcur)))
627
        goto convert_error;
628
      if (!(res = theora_dec_src_convert (pad, format, stop, &tformat, &tstop)))
629
        goto convert_error;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
630

631
      /* then seek with time on the peer */
632 633
      real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
          flags, cur_type, tcur, stop_type, tstop);
634

635
      res = gst_pad_push_event (dec->sinkpad, real_seek);
Benjamin Otte's avatar
Benjamin Otte committed
636 637
      break;
    }
638 639 640 641 642 643 644 645 646 647
    case GST_EVENT_QOS:
    {
      gdouble proportion;
      GstClockTimeDiff diff;
      GstClockTime timestamp;

      gst_event_parse_qos (event, &proportion, &diff, &timestamp);

      /* we cannot randomly skip frame decoding since we don't have
       * B frames. we can however use the timestamp and diff to not
648 649
       * push late frames. This would at least save us the time to
       * crop/memcpy the data. */
650 651 652 653 654
      GST_OBJECT_LOCK (dec);
      dec->proportion = proportion;
      dec->earliest_time = timestamp + diff;
      GST_OBJECT_UNLOCK (dec);

655 656 657
      GST_DEBUG_OBJECT (dec, "got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT,
          GST_TIME_ARGS (timestamp), diff);

658
      res = gst_pad_push_event (dec->sinkpad, event);
659 660
      break;
    }
Benjamin Otte's avatar
Benjamin Otte committed
661
    default:
662
      res = gst_pad_push_event (dec->sinkpad, event);
Benjamin Otte's avatar
Benjamin Otte committed
663 664
      break;
  }
665 666
done:
  gst_object_unref (dec);
Benjamin Otte's avatar
Benjamin Otte committed
667 668

  return res;
669

670 671 672 673 674 675
  /* ERRORS */
convert_error:
  {
    GST_DEBUG_OBJECT (dec, "could not convert format");
    goto done;
  }
676 677
}

678 679
static gboolean
theora_dec_sink_event (GstPad * pad, GstEvent * event)
Benjamin Otte's avatar
Benjamin Otte committed
680
{
681
  gboolean ret = FALSE;
682 683
  GstTheoraDec *dec;

Wim Taymans's avatar
Wim Taymans committed
684
  dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
685

Benjamin Otte's avatar
Benjamin Otte committed
686 687
  GST_LOG_OBJECT (dec, "handling event");
  switch (GST_EVENT_TYPE (event)) {
688 689 690 691 692 693 694
    case GST_EVENT_FLUSH_START:
      ret = gst_pad_push_event (dec->srcpad, event);
      break;
    case GST_EVENT_FLUSH_STOP:
      gst_theora_dec_reset (dec);
      ret = gst_pad_push_event (dec->srcpad, event);
      break;
Wim Taymans's avatar
Wim Taymans committed
695 696 697
    case GST_EVENT_EOS:
      ret = gst_pad_push_event (dec->srcpad, event);
      break;
698
    case GST_EVENT_NEWSEGMENT:
699
    {
700
      gboolean update;
701
      GstFormat format;
702
      gdouble rate, arate;
Wim Taymans's avatar
Wim Taymans committed
703
      gint64 start, stop, time;
704

705 706
      gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
          &start, &stop, &time);
707

708
      /* we need TIME format */
709 710 711
      if (format != GST_FORMAT_TIME)
        goto newseg_wrong_format;

712
      /* now configure the values */
713 714
      gst_segment_set_newsegment_full (&dec->segment, update,
          rate, arate, format, start, stop, time);
715

Wim Taymans's avatar
Wim Taymans committed
716
      /* We don't forward this unless/until the decoder is initialised */
717 718 719 720 721 722 723
      if (dec->have_header) {
        ret = gst_pad_push_event (dec->srcpad, event);
        dec->sent_newsegment = TRUE;
      } else {
        gst_event_unref (event);
        ret = TRUE;
      }
Benjamin Otte's avatar
Benjamin Otte committed
724
      break;
725
    }
Benjamin Otte's avatar
Benjamin Otte committed
726
    default:
Wim Taymans's avatar
Wim Taymans committed
727
      ret = gst_pad_push_event (dec->srcpad, event);
Benjamin Otte's avatar
Benjamin Otte committed
728 729
      break;
  }
730
done:
Wim Taymans's avatar
Wim Taymans committed
731 732
  gst_object_unref (dec);

733
  return ret;
734 735 736 737

  /* ERRORS */
newseg_wrong_format:
  {
738
    GST_DEBUG_OBJECT (dec, "received non TIME newsegment");
739
    gst_event_unref (event);
740 741
    goto done;
  }
Benjamin Otte's avatar
Benjamin Otte committed
742 743
}

744
static GstFlowReturn
745
theora_handle_comment_packet (GstTheoraDec * dec, ogg_packet * packet)
Benjamin Otte's avatar
Benjamin Otte committed
746
{
747
  gchar *encoder = NULL;
Benjamin Otte's avatar
Benjamin Otte committed
748
  GstBuffer *buf;
749 750
  GstTagList *list;

751
  GST_DEBUG_OBJECT (dec, "parsing comment packet");
752 753

  buf = gst_buffer_new_and_alloc (packet->bytes);
754
  memcpy (GST_BUFFER_DATA (buf), packet->packet, packet->bytes);
755

756 757
  list =
      gst_tag_list_from_vorbiscomment_buffer (buf, (guint8 *) "\201theora", 7,
758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774
      &encoder);

  gst_buffer_unref (buf);

  if (!list) {
    GST_ERROR_OBJECT (dec, "couldn't decode comments");
    list = gst_tag_list_new ();
  }
  if (encoder) {
    gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
        GST_TAG_ENCODER, encoder, NULL);
    g_free (encoder);
  }
  gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
      GST_TAG_ENCODER_VERSION, dec->info.version_major,
      GST_TAG_VIDEO_CODEC, "Theora", NULL);

775 776 777 778 779 780
  if (dec->info.target_bitrate > 0) {
    gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
        GST_TAG_BITRATE, dec->info.target_bitrate,
        GST_TAG_NOMINAL_BITRATE, dec->info.target_bitrate, NULL);
  }

781
  dec->tags = list;
782 783 784 785 786 787 788 789 790

  return GST_FLOW_OK;
}

static GstFlowReturn
theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
{
  GstCaps *caps;
  gint par_num, par_den;
791
  GstFlowReturn ret = GST_FLOW_OK;
792
  gboolean eret;
793
  GstEvent *event;
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817

  GST_DEBUG_OBJECT (dec, "fps %d/%d, PAR %d/%d",
      dec->info.fps_numerator, dec->info.fps_denominator,
      dec->info.aspect_numerator, dec->info.aspect_denominator);

  /* calculate par
   * the info.aspect_* values reflect PAR;
   * 0:0 is allowed and can be interpreted as 1:1, so correct for it */
  par_num = dec->info.aspect_numerator;
  par_den = dec->info.aspect_denominator;
  if (par_num == 0 && par_den == 0) {
    par_num = par_den = 1;
  }
  /* theora has:
   *
   *  width/height : dimension of the encoded frame 
   *  frame_width/frame_height : dimension of the visible part
   *  offset_x/offset_y : offset in encoded frame where visible part starts
   */
  GST_DEBUG_OBJECT (dec, "dimension %dx%d, PAR %d/%d", dec->info.width,
      dec->info.height, par_num, par_den);
  GST_DEBUG_OBJECT (dec, "frame dimension %dx%d, offset %d:%d",
      dec->info.frame_width, dec->info.frame_height,
      dec->info.offset_x, dec->info.offset_y);
818 819 820 821 822 823
  if (dec->info.pixelformat != OC_PF_420) {
    GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
        (NULL), ("pixel formats other than 4:2:0 not yet supported"));

    return GST_FLOW_ERROR;
  }
824 825 826 827

  if (dec->crop) {
    /* add black borders to make width/height/offsets even. we need this because
     * we cannot express an offset to the peer plugin. */
828 829
    dec->width =
        GST_ROUND_UP_2 (dec->info.frame_width + (dec->info.offset_x & 1));
830
    dec->height =
831
        GST_ROUND_UP_2 (dec->info.frame_height + (dec->info.offset_y & 1));
832 833 834 835 836 837 838 839 840 841
    dec->offset_x = dec->info.offset_x & ~1;
    dec->offset_y = dec->info.offset_y & ~1;
  } else {
    /* no cropping, use the encoded dimensions */
    dec->width = dec->info.width;
    dec->height = dec->info.height;
    dec->offset_x = 0;
    dec->offset_y = 0;
  }

842 843
  dec->granule_shift = _theora_ilog (dec->info.keyframe_frequency_force - 1);

844 845 846 847 848 849 850 851
  GST_DEBUG_OBJECT (dec, "after fixup frame dimension %dx%d, offset %d:%d",
      dec->width, dec->height, dec->offset_x, dec->offset_y);

  /* done */
  theora_decode_init (&dec->state, &dec->info);

  caps = gst_caps_new_simple ("video/x-raw-yuv",
      "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'),
852 853
      "framerate", GST_TYPE_FRACTION,
      dec->info.fps_numerator, dec->info.fps_denominator,
854 855 856 857 858
      "pixel-aspect-ratio", GST_TYPE_FRACTION, par_num, par_den,
      "width", G_TYPE_INT, dec->width, "height", G_TYPE_INT, dec->height, NULL);
  gst_pad_set_caps (dec->srcpad, caps);
  gst_caps_unref (caps);

Wim Taymans's avatar
Wim Taymans committed
859
  dec->have_header = TRUE;
860 861 862 863 864 865 866
  if (!dec->sent_newsegment) {
    GST_DEBUG_OBJECT (dec, "Sending newsegment event");

    event = gst_event_new_new_segment_full (FALSE,
        dec->segment.rate, dec->segment.applied_rate,
        dec->segment.format, dec->segment.start, dec->segment.stop,
        dec->segment.time);
867 868 869
    eret = gst_pad_push_event (dec->srcpad, event);
    if (!eret)
      ret = GST_FLOW_ERROR;
870 871
    dec->sent_newsegment = TRUE;
  }
872

873 874 875 876 877 878 879
  if (dec->tags) {
    gst_element_found_tags_for_pad (GST_ELEMENT_CAST (dec), dec->srcpad,
        dec->tags);
    dec->tags = NULL;
  }

  return ret;
880 881 882 883 884 885 886
}

static GstFlowReturn
theora_handle_header_packet (GstTheoraDec * dec, ogg_packet * packet)
{
  GstFlowReturn res;

887
  GST_DEBUG_OBJECT (dec, "parsing header packet");
888 889 890 891

  if (theora_decode_header (&dec->info, &dec->comment, packet))
    goto header_read_error;

Wim Taymans's avatar
Wim Taymans committed
892 893
  switch (packet->packet[0]) {
    case 0x81:
894 895
      res = theora_handle_comment_packet (dec, packet);
      break;
Wim Taymans's avatar
Wim Taymans committed
896
    case 0x82:
897 898 899 900
      res = theora_handle_type_packet (dec, packet);
      break;
    default:
      /* ignore */
Wim Taymans's avatar
Wim Taymans committed
901 902 903
      g_warning ("unknown theora header packet found");
    case 0x80:
      /* nothing special, this is the identification header */
904 905 906 907 908 909 910 911 912 913 914 915 916 917
      res = GST_FLOW_OK;
      break;
  }
  return res;

  /* ERRORS */
header_read_error:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
        (NULL), ("couldn't read header packet"));
    return GST_FLOW_ERROR;
  }
}

918 919 920 921 922
/* returns TRUE if buffer is within segment, else FALSE.
 * if Buffer is on segment border, it's timestamp and duration will be clipped */
static gboolean
clip_buffer (GstTheoraDec * dec, GstBuffer * buf)
{
923 924
  gboolean res = TRUE;
  GstClockTime in_ts, in_dur, stop;
925 926
  gint64 cstart, cstop;

927 928 929
  in_ts = GST_BUFFER_TIMESTAMP (buf);
  in_dur = GST_BUFFER_DURATION (buf);

930 931
  GST_LOG_OBJECT (dec,
      "timestamp:%" GST_TIME_FORMAT " , duration:%" GST_TIME_FORMAT,
932
      GST_TIME_ARGS (in_ts), GST_TIME_ARGS (in_dur));
933

934 935
  /* can't clip without TIME segment */
  if (dec->segment.format != GST_FORMAT_TIME)
936 937
    goto beach;

938 939 940 941 942 943 944 945 946 947 948
  /* we need a start time */
  if (!GST_CLOCK_TIME_IS_VALID (in_ts))
    goto beach;

  /* generate valid stop, if duration unknown, we have unknown stop */
  stop =
      GST_CLOCK_TIME_IS_VALID (in_dur) ? (in_ts + in_dur) : GST_CLOCK_TIME_NONE;

  /* now clip */
  if (!(res = gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
              in_ts, stop, &cstart, &cstop)))
949 950
    goto beach;

951 952
  /* update timestamp and possibly duration if the clipped stop time is
   * valid */
953
  GST_BUFFER_TIMESTAMP (buf) = cstart;