theoradec.c 29.6 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 20 21 22 23 24 25 26 27 28
/* 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.
 */

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

#include <gst/gst.h>
#include <theora/theora.h>
#include <string.h>
#include <gst/tag/tag.h>

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
29 30
GST_DEBUG_CATEGORY (theoradec_debug);
#define GST_CAT_DEFAULT theoradec_debug
Benjamin Otte's avatar
Benjamin Otte committed
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

#define GST_TYPE_THEORA_DEC \
  (gst_theora_dec_get_type())
#define GST_THEORA_DEC(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THEORA_DEC,GstTheoraDec))
#define GST_THEORA_DEC_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THEORA_DEC,GstTheoraDec))
#define GST_IS_THEORA_DEC(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THEORA_DEC))
#define GST_IS_THEORA_DEC_CLASS(obj) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THEORA_DEC))

typedef struct _GstTheoraDec GstTheoraDec;
typedef struct _GstTheoraDecClass GstTheoraDecClass;

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
46 47 48 49 50 51 52 53 54 55 56
struct _GstTheoraDec
{
  GstElement element;

  GstPad *sinkpad;
  GstPad *srcpad;

  theora_state state;
  theora_info info;
  theora_comment comment;

Wim Taymans's avatar
Wim Taymans committed
57
  gboolean have_header;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
58
  guint64 granulepos;
59

Wim Taymans's avatar
Wim Taymans committed
60 61
  GstClockTime last_timestamp;
  guint64 frame_nr;
62
  gboolean need_keyframe;
63 64
  gint width, height;
  gint offset_x, offset_y;
65 66

  gboolean crop;
67 68

  GList *queued;
69 70 71 72 73

  gdouble segment_rate;
  gint64 segment_start;
  gint64 segment_stop;
  gint64 segment_base;
Benjamin Otte's avatar
Benjamin Otte committed
74 75
};

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
76 77
struct _GstTheoraDecClass
{
Benjamin Otte's avatar
Benjamin Otte committed
78 79 80
  GstElementClass parent_class;
};

81 82 83 84 85 86 87
#define THEORA_DEF_CROP		TRUE
enum
{
  ARG_0,
  ARG_CROP
};

Benjamin Otte's avatar
Benjamin Otte committed
88 89
static GstElementDetails theora_dec_details = {
  "TheoraDec",
90
  "Codec/Decoder/Video",
Benjamin Otte's avatar
Benjamin Otte committed
91
  "decode raw theora streams to raw YUV video",
92 93
  "Benjamin Otte <in7y118@public.uni-hamburg.de>, "
      "Wim Taymans <wim@fluendo.com>",
Benjamin Otte's avatar
Benjamin Otte committed
94 95 96
};

static GstStaticPadTemplate theora_dec_src_factory =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
97 98 99 100
GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/x-raw-yuv, "
101 102 103
        "format = (fourcc) I420, "
        "framerate = (double) [0, MAX], "
        "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
104
    );
Benjamin Otte's avatar
Benjamin Otte committed
105 106

static GstStaticPadTemplate theora_dec_sink_factory =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
107 108 109 110 111
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/x-theora")
    );
Benjamin Otte's avatar
Benjamin Otte committed
112 113

GST_BOILERPLATE (GstTheoraDec, gst_theora_dec, GstElement, GST_TYPE_ELEMENT);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
114

115 116 117 118 119
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);

120 121
static gboolean theora_dec_sink_event (GstPad * pad, GstEvent * event);
static GstFlowReturn theora_dec_chain (GstPad * pad, GstBuffer * buffer);
122 123
static GstStateChangeReturn theora_dec_change_state (GstElement * element,
    GstStateChange transition);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
124
static gboolean theora_dec_src_event (GstPad * pad, GstEvent * event);
Wim Taymans's avatar
Wim Taymans committed
125
static gboolean theora_dec_src_query (GstPad * pad, GstQuery * query);
126 127 128 129 130 131
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
132
static gboolean theora_dec_sink_query (GstPad * pad, GstQuery * query);
133
static GstCaps *theora_dec_src_getcaps (GstPad * pad);
Wim Taymans's avatar
Wim Taymans committed
134 135

#if 0
136
static const GstFormat *theora_get_formats (GstPad * pad);
Wim Taymans's avatar
Wim Taymans committed
137 138
#endif
#if 0
139
static const GstEventMask *theora_get_event_masks (GstPad * pad);
Wim Taymans's avatar
Wim Taymans committed
140
#endif
141
static const GstQueryType *theora_get_query_types (GstPad * pad);
Benjamin Otte's avatar
Benjamin Otte committed
142 143 144 145 146 147


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
148 149

  gst_element_class_add_pad_template (element_class,
Benjamin Otte's avatar
Benjamin Otte committed
150 151 152 153 154 155 156
      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
157
gst_theora_dec_class_init (GstTheoraDecClass * klass)
Benjamin Otte's avatar
Benjamin Otte committed
158
{
159
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
Benjamin Otte's avatar
Benjamin Otte committed
160 161
  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

162 163 164 165 166 167 168 169
  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
170
  gstelement_class->change_state = theora_dec_change_state;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
171 172

  GST_DEBUG_CATEGORY_INIT (theoradec_debug, "theoradec", 0, "Theora decoder");
Benjamin Otte's avatar
Benjamin Otte committed
173 174 175
}

static void
176
gst_theora_dec_init (GstTheoraDec * dec, GstTheoraDecClass * g_class)
Benjamin Otte's avatar
Benjamin Otte committed
177
{
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
178 179 180
  dec->sinkpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&theora_dec_sink_factory), "sink");
Wim Taymans's avatar
Wim Taymans committed
181
  gst_pad_set_query_function (dec->sinkpad, theora_dec_sink_query);
182
  gst_pad_set_event_function (dec->sinkpad, theora_dec_sink_event);
Benjamin Otte's avatar
Benjamin Otte committed
183 184 185
  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
186 187 188
  dec->srcpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&theora_dec_src_factory), "src");
189
  gst_pad_set_getcaps_function (dec->srcpad, theora_dec_src_getcaps);
Benjamin Otte's avatar
Benjamin Otte committed
190
  gst_pad_set_event_function (dec->srcpad, theora_dec_src_event);
191
  gst_pad_set_query_type_function (dec->srcpad, theora_get_query_types);
192
  gst_pad_set_query_function (dec->srcpad, theora_dec_src_query);
193

Benjamin Otte's avatar
Benjamin Otte committed
194 195
  gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);

196
  dec->crop = THEORA_DEF_CROP;
197
  dec->queued = NULL;
Benjamin Otte's avatar
Benjamin Otte committed
198
}
199 200

/* FIXME: copy from libtheora, theora should somehow make this available for seeking */
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
201 202 203 204 205 206
static int
_theora_ilog (unsigned int v)
{
  int ret = 0;

  while (v) {
207
    ret++;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
208
    v >>= 1;
209
  }
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
210
  return (ret);
211 212
}

213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233
static void
_inc_granulepos (GstTheoraDec * dec)
{
  guint ilog;
  gint framecount;

  if (dec->granulepos == -1)
    return;

  ilog = _theora_ilog (dec->info.keyframe_frequency_force - 1);

  framecount = dec->granulepos >> ilog;
  framecount += dec->granulepos - (framecount << ilog);

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

  framecount++;

  dec->granulepos = (framecount << ilog);
}

Wim Taymans's avatar
Wim Taymans committed
234
#if 0
235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251
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
252
#endif
253

Wim Taymans's avatar
Wim Taymans committed
254
#if 0
255 256 257 258 259 260 261 262 263 264
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
265
#endif
266 267 268 269 270 271 272 273 274 275 276 277 278

static const GstQueryType *
theora_get_query_types (GstPad * pad)
{
  static const GstQueryType theora_src_query_types[] = {
    GST_QUERY_POSITION,
    0
  };

  return theora_src_query_types;
}


279
static gboolean
280 281 282
theora_dec_src_convert (GstPad * pad,
    GstFormat src_format, gint64 src_value,
    GstFormat * dest_format, gint64 * dest_value)
283
{
284 285 286 287
  gboolean res = TRUE;
  GstTheoraDec *dec;
  guint64 scale = 1;

288
  dec = GST_THEORA_DEC (GST_PAD_PARENT (pad));
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
289

290
  /* we need the info part before we can done something */
Wim Taymans's avatar
Wim Taymans committed
291
  if (!dec->have_header)
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
292 293
    return FALSE;

Wim Taymans's avatar
Wim Taymans committed
294 295 296 297 298
  if (src_format == *dest_format) {
    *dest_value = src_value;
    return TRUE;
  }

299 300 301 302 303 304 305 306 307 308 309 310 311
  switch (src_format) {
    case GST_FORMAT_BYTES:
      switch (*dest_format) {
        case GST_FORMAT_DEFAULT:
          *dest_value =
              src_value * 2 / (dec->info.height * dec->info.width * 3);
          break;
        case GST_FORMAT_TIME:
          /* seems like a rather silly conversion, implement me if you like */
        default:
          res = FALSE;
      }
      break;
312
    case GST_FORMAT_TIME:
313 314
      switch (*dest_format) {
        case GST_FORMAT_BYTES:
315
          scale = 3 * (dec->info.width * dec->info.height) / 2;
316
        case GST_FORMAT_DEFAULT:
317 318 319
          *dest_value =
              scale * (((guint64) src_value * dec->info.fps_numerator) /
              (dec->info.fps_denominator * GST_SECOND));
320 321 322 323
          break;
        default:
          res = FALSE;
      }
324 325
      break;
    case GST_FORMAT_DEFAULT:
326 327 328 329 330 331 332 333 334 335 336 337
      switch (*dest_format) {
        case GST_FORMAT_TIME:
          *dest_value = src_value * (GST_SECOND * dec->info.fps_denominator /
              dec->info.fps_numerator);
          break;
        case GST_FORMAT_BYTES:
          *dest_value =
              src_value * 3 * (dec->info.width * dec->info.height) / 2;
          break;
        default:
          res = FALSE;
      }
338 339
      break;
    default:
340
      res = FALSE;
341
  }
342 343

  return res;
344 345
}

Benjamin Otte's avatar
Benjamin Otte committed
346
static gboolean
347 348 349
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
350
{
351 352
  gboolean res = TRUE;
  GstTheoraDec *dec;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
353

354
  dec = GST_THEORA_DEC (GST_PAD_PARENT (pad));
355 356

  /* we need the info part before we can done something */
Wim Taymans's avatar
Wim Taymans committed
357
  if (!dec->have_header)
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
358 359
    return FALSE;

Wim Taymans's avatar
Wim Taymans committed
360 361 362 363 364
  if (src_format == *dest_format) {
    *dest_value = src_value;
    return TRUE;
  }

365
  switch (src_format) {
Benjamin Otte's avatar
Benjamin Otte committed
366
    case GST_FORMAT_DEFAULT:
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385
    {
      guint64 framecount;
      guint ilog;

      ilog = _theora_ilog (dec->info.keyframe_frequency_force - 1);

      /* granulepos is last ilog bits for counting pframes since last iframe and 
       * bits in front of that for the framenumber of the last iframe. */
      framecount = src_value >> ilog;
      framecount += src_value - (framecount << ilog);

      switch (*dest_format) {
        case GST_FORMAT_TIME:
          *dest_value = framecount * (GST_SECOND * dec->info.fps_denominator /
              dec->info.fps_numerator);
          break;
        default:
          res = FALSE;
      }
386
      break;
387
    }
388 389 390 391 392 393
    case GST_FORMAT_TIME:
    {
      switch (*dest_format) {
        case GST_FORMAT_DEFAULT:
        {
          guint ilog = _theora_ilog (dec->info.keyframe_frequency_force - 1);
394
          guint rest;
395

396
          /* framecount */
397 398
          *dest_value = src_value * dec->info.fps_numerator /
              (GST_SECOND * dec->info.fps_denominator);
399 400 401 402

          /* funny way of calculating granulepos in theora */
          rest = *dest_value / dec->info.keyframe_frequency_force;
          *dest_value -= rest;
403
          *dest_value <<= ilog;
404
          *dest_value += rest;
405 406 407 408 409 410 411 412
          break;
        }
        default:
          res = FALSE;
          break;
      }
      break;
    }
Benjamin Otte's avatar
Benjamin Otte committed
413
    default:
414
      res = FALSE;
Benjamin Otte's avatar
Benjamin Otte committed
415
  }
416 417

  return res;
Benjamin Otte's avatar
Benjamin Otte committed
418
}
419 420

static gboolean
Wim Taymans's avatar
Wim Taymans committed
421
theora_dec_src_query (GstPad * pad, GstQuery * query)
422
{
423
  GstTheoraDec *dec = GST_THEORA_DEC (GST_PAD_PARENT (pad));
Wim Taymans's avatar
Wim Taymans committed
424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439
  gboolean res = FALSE;

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_POSITION:
    {
      gint64 granulepos, total, value;
      GstFormat my_format, format;
      gint64 time;

      /* forward to peer for total */
      if (!(res = gst_pad_query (GST_PAD_PEER (dec->sinkpad), query)))
        goto error;

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

440 441 442
      GST_LOG_OBJECT (dec,
          "query %p: we have current granule: %lld", query, granulepos);

Wim Taymans's avatar
Wim Taymans committed
443 444 445
      /* parse total time from peer and format */
      gst_query_parse_position (query, &format, NULL, &total);

446 447 448 449
      GST_LOG_OBJECT (dec,
          "query %p: peer returned total: %lld (format %u)",
          query, total, format);

Wim Taymans's avatar
Wim Taymans committed
450 451 452 453 454 455 456 457
      /* 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;

458 459
      time = (time - dec->segment_start) + dec->segment_base;

460 461 462
      GST_LOG_OBJECT (dec,
          "query %p: our time: %" GST_TIME_FORMAT, query, GST_TIME_ARGS (time));

Wim Taymans's avatar
Wim Taymans committed
463 464 465 466 467 468 469
      if (!(res =
              theora_dec_src_convert (pad, my_format, time, &format, &value)))
        goto error;

      gst_query_set_position (query, format, value, total);

      GST_LOG_OBJECT (dec,
470 471
          "query %p: we return %lld and %lld (format %u)",
          query, value, total, format);
Wim Taymans's avatar
Wim Taymans committed
472 473 474 475 476 477 478 479 480

      break;
    }
    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);
481
      if (!(res =
Wim Taymans's avatar
Wim Taymans committed
482 483
              theora_dec_src_convert (pad, src_fmt, src_val, &dest_fmt,
                  &dest_val)))
484 485 486
        goto error;

      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
Wim Taymans's avatar
Wim Taymans committed
487 488 489 490 491
      break;
    }
    default:
      res = FALSE;
      break;
492
  }
493
  return res;
494

Wim Taymans's avatar
Wim Taymans committed
495
error:
496
  GST_DEBUG ("query failed");
Wim Taymans's avatar
Wim Taymans committed
497 498 499 500 501 502 503 504 505 506 507 508 509
  return res;
}

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;
510

Wim Taymans's avatar
Wim Taymans committed
511 512 513 514 515 516 517 518 519 520 521 522 523
      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:
      res = FALSE;
      break;
  }
524

Wim Taymans's avatar
Wim Taymans committed
525 526
error:
  return res;
527 528
}

Benjamin Otte's avatar
Benjamin Otte committed
529
static gboolean
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
530
theora_dec_src_event (GstPad * pad, GstEvent * event)
Benjamin Otte's avatar
Benjamin Otte committed
531 532 533 534
{
  gboolean res = TRUE;
  GstTheoraDec *dec;

535
  dec = GST_THEORA_DEC (GST_PAD_PARENT (pad));
Benjamin Otte's avatar
Benjamin Otte committed
536 537

  switch (GST_EVENT_TYPE (event)) {
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
538
    case GST_EVENT_SEEK:{
539 540
      GstFormat format, tformat;
      gdouble rate;
Scott Wheeler Wheeler's avatar
Scott Wheeler Wheeler committed
541
      GstEvent *real_seek;
542 543 544 545 546 547 548
      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);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
549

550 551 552 553 554 555
      /* 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 
       */
556 557 558 559
      tformat = GST_FORMAT_TIME;
      if (!(res = theora_dec_src_convert (pad, format, cur, &tformat, &tcur)))
        goto error;
      if (!(res = theora_dec_src_convert (pad, format, stop, &tformat, &tstop)))
560
        goto error;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
561

562
      /* then seek with time on the peer */
563 564
      real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
          flags, cur_type, tcur, stop_type, tstop);
565

566
      res = gst_pad_push_event (dec->sinkpad, real_seek);
567

Benjamin Otte's avatar
Benjamin Otte committed
568 569 570 571 572 573 574 575 576
      gst_event_unref (event);
      break;
    }
    default:
      res = gst_pad_event_default (pad, event);
      break;
  }

  return res;
577 578 579 580

error:
  gst_event_unref (event);
  return res;
Benjamin Otte's avatar
Benjamin Otte committed
581 582
}

583 584 585 586 587 588
static GstCaps *
theora_dec_src_getcaps (GstPad * pad)
{
  GstCaps *caps;

  GST_LOCK (pad);
589 590 591
  if (!(caps = GST_PAD_CAPS (pad)))
    caps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
  caps = gst_caps_ref (caps);
592 593
  GST_UNLOCK (pad);

594
  return caps;
595 596
}

597 598
static gboolean
theora_dec_sink_event (GstPad * pad, GstEvent * event)
Benjamin Otte's avatar
Benjamin Otte committed
599
{
600
  gboolean ret = FALSE;
601 602
  GstTheoraDec *dec;

Wim Taymans's avatar
Wim Taymans committed
603
  dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
604

Benjamin Otte's avatar
Benjamin Otte committed
605 606
  GST_LOG_OBJECT (dec, "handling event");
  switch (GST_EVENT_TYPE (event)) {
Wim Taymans's avatar
Wim Taymans committed
607 608 609 610 611
    case GST_EVENT_EOS:
      GST_STREAM_LOCK (pad);
      ret = gst_pad_push_event (dec->srcpad, event);
      GST_STREAM_UNLOCK (pad);
      break;
612
    case GST_EVENT_NEWSEGMENT:
613 614 615 616 617
    {
      GstFormat format;
      gdouble rate;
      gint64 start, stop, base;

618
      GST_STREAM_LOCK (pad);
619 620
      gst_event_parse_newsegment (event, NULL, &rate, &format, &start, &stop,
          &base);
621 622 623 624 625 626 627 628 629 630 631 632 633 634

      /* we need TIME and a positive rate */
      if (format != GST_FORMAT_TIME)
        goto newseg_wrong_format;

      if (rate <= 0.0)
        goto newseg_wrong_rate;

      /* now copy over the values */
      dec->segment_rate = rate;
      dec->segment_start = start;
      dec->segment_stop = stop;
      dec->segment_base = base;

Wim Taymans's avatar
Wim Taymans committed
635 636 637 638
      dec->need_keyframe = TRUE;
      dec->granulepos = -1;
      dec->last_timestamp = -1;
      ret = gst_pad_push_event (dec->srcpad, event);
639
      GST_STREAM_UNLOCK (pad);
Benjamin Otte's avatar
Benjamin Otte committed
640
      break;
641
    }
Benjamin Otte's avatar
Benjamin Otte committed
642
    default:
Wim Taymans's avatar
Wim Taymans committed
643
      ret = gst_pad_push_event (dec->srcpad, event);
Benjamin Otte's avatar
Benjamin Otte committed
644 645
      break;
  }
646
done:
Wim Taymans's avatar
Wim Taymans committed
647 648
  gst_object_unref (dec);

649
  return ret;
650 651 652 653 654 655 656 657 658 659 660 661 662 663

  /* ERRORS */
newseg_wrong_format:
  {
    GST_STREAM_UNLOCK (pad);
    GST_DEBUG ("received non TIME newsegment");
    goto done;
  }
newseg_wrong_rate:
  {
    GST_STREAM_UNLOCK (pad);
    GST_DEBUG ("negative rates not supported yet");
    goto done;
  }
Benjamin Otte's avatar
Benjamin Otte committed
664 665
}

666 667 668 669
#define ROUND_UP_2(x) (((x) + 1) & ~1)
#define ROUND_UP_4(x) (((x) + 3) & ~3)
#define ROUND_UP_8(x) (((x) + 7) & ~7)

670
static GstFlowReturn
671
theora_handle_comment_packet (GstTheoraDec * dec, ogg_packet * packet)
Benjamin Otte's avatar
Benjamin Otte committed
672
{
673
  gchar *encoder = NULL;
Benjamin Otte's avatar
Benjamin Otte committed
674
  GstBuffer *buf;
675 676 677 678 679
  GstTagList *list;

  GST_DEBUG ("parsing comment packet");

  buf = gst_buffer_new_and_alloc (packet->bytes);
680
  memcpy (GST_BUFFER_DATA (buf), packet->packet, packet->bytes);
681

682 683
  list =
      gst_tag_list_from_vorbiscomment_buffer (buf, (guint8 *) "\201theora", 7,
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702
      &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_NOMINAL_BITRATE, dec->info.target_bitrate,
      GST_TAG_VIDEO_CODEC, "Theora", NULL);

  //gst_element_found_tags_for_pad (GST_ELEMENT (dec), dec->srcpad, 0, list);
703
  gst_tag_list_free (list);
704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768

  return GST_FLOW_OK;
}

static GstFlowReturn
theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
{
  GstCaps *caps;
  gint par_num, par_den;

  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);

  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. */
    dec->width = ROUND_UP_2 (dec->info.frame_width + (dec->info.offset_x & 1));
    dec->height =
        ROUND_UP_2 (dec->info.frame_height + (dec->info.offset_y & 1));
    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;
  }

  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'),
      "framerate", G_TYPE_DOUBLE,
      ((gdouble) dec->info.fps_numerator) / dec->info.fps_denominator,
      "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
769
  dec->have_header = TRUE;
770 771 772 773 774 775 776 777 778 779 780 781 782 783

  return GST_FLOW_OK;
}

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

  GST_DEBUG ("parsing header packet");

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

Wim Taymans's avatar
Wim Taymans committed
784 785
  switch (packet->packet[0]) {
    case 0x81:
786 787
      res = theora_handle_comment_packet (dec, packet);
      break;
Wim Taymans's avatar
Wim Taymans committed
788
    case 0x82:
789 790 791 792
      res = theora_handle_type_packet (dec, packet);
      break;
    default:
      /* ignore */
Wim Taymans's avatar
Wim Taymans committed
793 794 795
      g_warning ("unknown theora header packet found");
    case 0x80:
      /* nothing special, this is the identification header */
796 797 798 799 800 801 802 803 804 805 806 807 808 809
      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;
  }
}

810 811 812 813
static GstFlowReturn
theora_dec_push (GstTheoraDec * dec, GstBuffer * buf)
{
  GstFlowReturn result;
Wim Taymans's avatar
Wim Taymans committed
814
  GstClockTime outtime = GST_BUFFER_TIMESTAMP (buf);
815

Wim Taymans's avatar
Wim Taymans committed
816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846
  if (outtime == GST_CLOCK_TIME_NONE) {
    dec->queued = g_list_append (dec->queued, buf);
    GST_DEBUG_OBJECT (dec, "queued buffer");
    result = GST_FLOW_OK;
  } else {
    if (dec->queued) {
      gint64 size;
      GList *walk;

      GST_DEBUG_OBJECT (dec, "first buffer with time %" GST_TIME_FORMAT,
          GST_TIME_ARGS (outtime));

      size = g_list_length (dec->queued);
      for (walk = dec->queued; walk; walk = g_list_next (walk)) {
        GstBuffer *buffer = GST_BUFFER (walk->data);
        GstClockTime time;

        time = outtime - ((size * GST_SECOND * dec->info.fps_denominator)
            / dec->info.fps_numerator);

        GST_DEBUG_OBJECT (dec, "patch buffer %lld %lld", size, time);
        GST_BUFFER_TIMESTAMP (buffer) = time;
        /* ignore the result */
        gst_pad_push (dec->srcpad, buffer);
        size--;
      }
      g_list_free (dec->queued);
      dec->queued = NULL;
    }
    result = gst_pad_push (dec->srcpad, buf);
  }
847 848 849 850

  return result;
}

851 852 853 854 855 856 857 858 859 860 861 862 863 864 865
static GstFlowReturn
theora_handle_data_packet (GstTheoraDec * dec, ogg_packet * packet,
    GstClockTime outtime)
{
  /* normal data packet */
  yuv_buffer yuv;
  GstBuffer *out;
  guint i;
  gboolean keyframe;
  gint out_size;
  gint stride_y, stride_uv;
  gint width, height;
  gint cwidth, cheight;
  GstFlowReturn result;

Wim Taymans's avatar
Wim Taymans committed
866
  if (!dec->have_header)
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902
    goto not_initialized;

  /* the second most significant bit of the first data byte is cleared 
   * for keyframes */
  keyframe = (packet->packet[0] & 0x40) == 0;
  if (keyframe) {
    dec->need_keyframe = FALSE;
  } else if (dec->need_keyframe) {
    goto dropping;
  }

  if (theora_decode_packetin (&dec->state, packet))
    goto could_not_read;

  if (theora_decode_YUVout (&dec->state, &yuv) < 0)
    goto decode_error;

  if ((yuv.y_width != dec->info.width) || (yuv.y_height != dec->info.height))
    goto wrong_dimensions;


  width = dec->width;
  height = dec->height;
  cwidth = width / 2;
  cheight = height / 2;

  /* should get the stride from the caps, for now we round up to the nearest
   * multiple of 4 because some element needs it. chroma needs special 
   * treatment, see videotestsrc. */
  stride_y = ROUND_UP_4 (width);
  stride_uv = ROUND_UP_8 (width) / 2;

  out_size = stride_y * height + stride_uv * cheight * 2;

  /* now copy over the area contained in offset_x,offset_y,
   * frame_width, frame_height */
Wim Taymans's avatar
Wim Taymans committed
903 904 905
  result = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE, out_size,
      GST_PAD_CAPS (dec->srcpad), &out);
  if (result != GST_FLOW_OK)
906 907 908 909 910
    goto no_buffer;

  /* copy the visible region to the destination. This is actually pretty
   * complicated and gstreamer doesn't support all the needed caps to do this
   * correctly. For example, when we have an odd offset, we should only combine
911
   * 1 row/column of luma samples with one chroma sample in colorspace conversion. 
Wim Taymans's avatar
Wim Taymans committed
912
   * We compensate for this by adding a black border around the image when the
913
   * offset or size is odd (see above).
914 915
   */
  {
Andy Wingo Wingo's avatar
Andy Wingo Wingo committed
916 917 918
    guchar *dest_y, *src_y;
    guchar *dest_u, *src_u;
    guchar *dest_v, *src_v;
919

Andy Wingo Wingo's avatar
Andy Wingo Wingo committed
920
    dest_y = GST_BUFFER_DATA (out);
921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946
    dest_u = dest_y + stride_y * height;
    dest_v = dest_u + stride_uv * cheight;

    src_y = yuv.y + dec->offset_x + dec->offset_y * yuv.y_stride;

    for (i = 0; i < height; i++) {
      memcpy (dest_y, src_y, width);

      dest_y += stride_y;
      src_y += yuv.y_stride;
    }

    src_u = yuv.u + dec->offset_x / 2 + dec->offset_y / 2 * yuv.uv_stride;
    src_v = yuv.v + dec->offset_x / 2 + dec->offset_y / 2 * yuv.uv_stride;

    for (i = 0; i < cheight; i++) {
      memcpy (dest_u, src_u, cwidth);
      memcpy (dest_v, src_v, cwidth);

      dest_u += stride_uv;
      src_u += yuv.uv_stride;
      dest_v += stride_uv;
      src_v += yuv.uv_stride;
    }
  }

Wim Taymans's avatar
Wim Taymans committed
947 948 949
  GST_BUFFER_OFFSET (out) = dec->frame_nr;
  dec->frame_nr++;
  GST_BUFFER_OFFSET_END (out) = dec->frame_nr;
950 951 952 953 954
  GST_BUFFER_DURATION (out) =
      GST_SECOND * ((gdouble) dec->info.fps_denominator) /
      dec->info.fps_numerator;
  GST_BUFFER_TIMESTAMP (out) = outtime;

955
  result = theora_dec_push (dec, out);
956 957 958 959 960 961 962

  return result;

  /* ERRORS */
not_initialized:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
Wim Taymans's avatar
Wim Taymans committed
963
        (NULL), ("no header sent yet"));
964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990
    return GST_FLOW_ERROR;
  }
dropping:
  {
    GST_WARNING_OBJECT (dec, "dropping frame because we need a keyframe");
    return GST_FLOW_OK;
  }
could_not_read:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
        (NULL), ("theora decoder did not read data packet"));
    return GST_FLOW_ERROR;
  }
decode_error:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
        (NULL), ("couldn't read out YUV image"));
    return GST_FLOW_ERROR;
  }
wrong_dimensions:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
        (NULL), ("dimensions of image do not match header"));
    return GST_FLOW_ERROR;
  }
no_buffer:
  {
991
    return result;
992 993 994 995 996 997
  }
}

static GstFlowReturn
theora_dec_chain (GstPad * pad, GstBuffer * buf)
{
Benjamin Otte's avatar
Benjamin Otte committed
998 999
  GstTheoraDec *dec;
  ogg_packet packet;
1000
  GstFlowReturn result = GST_FLOW_OK;
Benjamin Otte's avatar
Benjamin Otte committed
1001

Wim Taymans's avatar
Wim Taymans committed
1002
  dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
1003

Benjamin Otte's avatar
Benjamin Otte committed
1004 1005 1006
  /* make ogg_packet out of the buffer */
  packet.packet = GST_BUFFER_DATA (buf);
  packet.bytes = GST_BUFFER_SIZE (buf);
Wim Taymans's avatar
Wim Taymans committed
1007 1008 1009
  packet.granulepos = GST_BUFFER_OFFSET_END (buf);
  packet.packetno = 0;          /* we don't really care */
  packet.b_o_s = dec->have_header ? 0 : 1;
1010
  packet.e_o_s = 0;
1011

Wim Taymans's avatar
Wim Taymans committed
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
  if (dec->have_header) {
    if (packet.granulepos != -1) {
      dec->granulepos = packet.granulepos;
      dec->last_timestamp =
          GST_SECOND * theora_granule_time (&dec->state, packet.granulepos);
    } else if (dec->last_timestamp != -1) {
      dec->last_timestamp +=
          (GST_SECOND * dec->info.fps_denominator) / dec->info.fps_numerator;
    }
  } else {
    dec->last_timestamp = -1;
  }

1025
  GST_DEBUG_OBJECT (dec, "header=%d packetno=%lld, outtime=%" GST_TIME_FORMAT,
Wim Taymans's avatar
Wim Taymans committed
1026
      packet.packet[0], packet.packetno, GST_TIME_ARGS (dec->last_timestamp));
1027

Benjamin Otte's avatar
Benjamin Otte committed
1028 1029
  /* switch depending on packet type */
  if (packet.packet[0] & 0x80) {
Wim Taymans's avatar
Wim Taymans committed
1030
    if (dec->have_header) {
1031
      GST_WARNING_OBJECT (GST_OBJECT (dec), "Ignoring header");
1032
      goto done;
1033
    }
1034
    result = theora_handle_header_packet (dec, &packet);
Benjamin Otte's avatar
Benjamin Otte committed
1035
  } else {
Wim Taymans's avatar
Wim Taymans committed
1036
    result = theora_handle_data_packet (dec, &packet, dec->last_timestamp);
Benjamin Otte's avatar
Benjamin Otte committed
1037
  }
1038

1039
done:
1040
  _inc_granulepos (dec);
1041

Wim Taymans's avatar
Wim Taymans committed
1042 1043
  gst_object_unref (dec);

1044
  gst_buffer_unref (buf);
1045 1046

  return result;
Benjamin Otte's avatar
Benjamin Otte committed
1047 1048
}

1049 1050
static GstStateChangeReturn
theora_dec_change_state (GstElement * element, GstStateChange transition)
Benjamin Otte's avatar
Benjamin Otte committed
1051 1052
{
  GstTheoraDec *dec = GST_THEORA_DEC (element);
1053
  GstStateChangeReturn ret;
Benjamin Otte's avatar
Benjamin Otte committed
1054

1055 1056

  switch (transition) {
1057
    case GST_STATE_CHANGE_NULL_TO_READY:
Benjamin Otte's avatar
Benjamin Otte committed
1058
      break;
1059
    case GST_STATE_CHANGE_READY_TO_PAUSED:
Benjamin Otte's avatar
Benjamin Otte committed
1060 1061
      theora_info_init (&dec->info);
      theora_comment_init (&dec->comment);
Wim Taymans's avatar
Wim Taymans committed
1062
      dec->have_header = FALSE;
1063
      dec->need_keyframe = TRUE;
Wim Taymans's avatar
Wim Taymans committed
1064
      dec->last_timestamp = -1;
1065
      dec->granulepos = -1;
Benjamin Otte's avatar
Benjamin Otte committed
1066
      break;
1067
    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
Benjamin Otte's avatar
Benjamin Otte committed
1068
      break;
1069 1070 1071 1072
    default:
      break;
  }

1073
  ret = parent_class->change_state (element, transition);
1074 1075

  switch (transition) {
1076
    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
Benjamin Otte's avatar
Benjamin Otte committed
1077
      break;
1078
    case GST_STATE_CHANGE_PAUSED_TO_READY:
Benjamin Otte's avatar
Benjamin Otte committed
1079 1080 1081
      theora_clear (&dec->state);
      theora_comment_clear (&dec->comment);
      theora_info_clear (&dec->info);
Wim Taymans's avatar
Wim Taymans committed
1082
      dec->have_header = FALSE;
1083
      dec->granulepos = -1;
Benjamin Otte's avatar
Benjamin Otte committed
1084
      break;
1085
    case GST_STATE_CHANGE_READY_TO_NULL:
Benjamin Otte's avatar
Benjamin Otte committed
1086 1087 1088 1089 1090
      break;
    default:
      break;
  }

1091
  return ret;
Benjamin Otte's avatar
Benjamin Otte committed
1092
}
Wim Taymans's avatar