matroska-read-common.c 66.1 KB
Newer Older
1
/* GStreamer Matroska muxer/demuxer
2
3
4
 * (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
 * (c) 2006 Tim-Philipp Müller <tim centricular net>
 * (c) 2008 Sebastian Dröge <slomo@circular-chaos.org>
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 * (c) 2011 Debarshi Ray <rishi@gnu.org>
 *
 * matroska-read-common.c: shared by matroska file/stream demuxer and parser
 *
 * 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

29
#include <stdio.h>
30
31
32
33
34
35
36
37
38
39
#include <string.h>

#ifdef HAVE_ZLIB
#include <zlib.h>
#endif

#ifdef HAVE_BZ2
#include <bzlib.h>
#endif

40
41
42
#include <gst/tag/tag.h>
#include <gst/base/gsttypefindhelper.h>

43
44
#include "lzo.h"

45
46
47
#include "ebml-read.h"
#include "matroska-read-common.h"

48
GST_DEBUG_CATEGORY (matroskareadcommon_debug);
49
50
51
52
53
54
55
56
57
58
#define GST_CAT_DEFAULT matroskareadcommon_debug

#define DEBUG_ELEMENT_START(common, ebml, element) \
    GST_DEBUG_OBJECT (common, "Parsing " element " element at offset %" \
        G_GUINT64_FORMAT, gst_ebml_read_get_pos (ebml))

#define DEBUG_ELEMENT_STOP(common, ebml, element, ret) \
    GST_DEBUG_OBJECT (common, "Parsing " element " element " \
        " finished with '%s'", gst_flow_get_name (ret))

59
60
61
62
#define GST_MATROSKA_TOC_UID_CHAPTER "chapter"
#define GST_MATROSKA_TOC_UID_EDITION "edition"
#define GST_MATROSKA_TOC_UID_EMPTY "empty"

63
static gboolean
64
gst_matroska_decompress_data (GstMatroskaTrackEncoding * enc,
René Stadler's avatar
René Stadler committed
65
    gpointer * data_out, gsize * size_out,
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
    GstMatroskaTrackCompressionAlgorithm algo)
{
  guint8 *new_data = NULL;
  guint new_size = 0;
  guint8 *data = *data_out;
  guint size = *size_out;
  gboolean ret = TRUE;

  if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_ZLIB) {
#ifdef HAVE_ZLIB
    /* zlib encoded data */
    z_stream zstream;
    guint orig_size;
    int result;

    orig_size = size;
    zstream.zalloc = (alloc_func) 0;
    zstream.zfree = (free_func) 0;
    zstream.opaque = (voidpf) 0;
    if (inflateInit (&zstream) != Z_OK) {
      GST_WARNING ("zlib initialization failed.");
      ret = FALSE;
      goto out;
    }
    zstream.next_in = (Bytef *) data;
    zstream.avail_in = orig_size;
    new_size = orig_size;
    new_data = g_malloc (new_size);
    zstream.avail_out = new_size;
    zstream.next_out = (Bytef *) new_data;

    do {
      result = inflate (&zstream, Z_NO_FLUSH);
      if (result != Z_OK && result != Z_STREAM_END) {
        GST_WARNING ("zlib decompression failed.");
        g_free (new_data);
        inflateEnd (&zstream);
        break;
      }
      new_size += 4000;
      new_data = g_realloc (new_data, new_size);
      zstream.next_out = (Bytef *) (new_data + zstream.total_out);
      zstream.avail_out += 4000;
    } while (zstream.avail_in != 0 && result != Z_STREAM_END);

    if (result != Z_STREAM_END) {
      ret = FALSE;
      goto out;
    } else {
      new_size = zstream.total_out;
      inflateEnd (&zstream);
    }
#else
    GST_WARNING ("zlib encoded tracks not supported.");
    ret = FALSE;
    goto out;
#endif
  } else if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_BZLIB) {
#ifdef HAVE_BZ2
    /* bzip2 encoded data */
    bz_stream bzstream;
    guint orig_size;
    int result;

    bzstream.bzalloc = NULL;
    bzstream.bzfree = NULL;
    bzstream.opaque = NULL;
    orig_size = size;

    if (BZ2_bzDecompressInit (&bzstream, 0, 0) != BZ_OK) {
      GST_WARNING ("bzip2 initialization failed.");
      ret = FALSE;
      goto out;
    }

    bzstream.next_in = (char *) data;
    bzstream.avail_in = orig_size;
    new_size = orig_size;
    new_data = g_malloc (new_size);
    bzstream.avail_out = new_size;
    bzstream.next_out = (char *) new_data;

    do {
      result = BZ2_bzDecompress (&bzstream);
      if (result != BZ_OK && result != BZ_STREAM_END) {
        GST_WARNING ("bzip2 decompression failed.");
        g_free (new_data);
        BZ2_bzDecompressEnd (&bzstream);
        break;
      }
      new_size += 4000;
      new_data = g_realloc (new_data, new_size);
      bzstream.next_out = (char *) (new_data + bzstream.total_out_lo32);
      bzstream.avail_out += 4000;
    } while (bzstream.avail_in != 0 && result != BZ_STREAM_END);

    if (result != BZ_STREAM_END) {
      ret = FALSE;
      goto out;
    } else {
      new_size = bzstream.total_out_lo32;
      BZ2_bzDecompressEnd (&bzstream);
    }
#else
    GST_WARNING ("bzip2 encoded tracks not supported.");
    ret = FALSE;
    goto out;
#endif
  } else if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_LZO1X) {
    /* lzo encoded data */
    int result;
    int orig_size, out_size;

    orig_size = size;
    out_size = size;
    new_size = size;
    new_data = g_malloc (new_size);

    do {
      orig_size = size;
      out_size = new_size;

      result = lzo1x_decode (new_data, &out_size, data, &orig_size);

      if (orig_size > 0) {
        new_size += 4000;
        new_data = g_realloc (new_data, new_size);
      }
    } while (orig_size > 0 && result == LZO_OUTPUT_FULL);

    new_size -= out_size;

    if (result != LZO_OUTPUT_FULL) {
      GST_WARNING ("lzo decompression failed");
      g_free (new_data);

      ret = FALSE;
      goto out;
    }

  } else if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_HEADERSTRIP) {
    /* header stripped encoded data */
    if (enc->comp_settings_length > 0) {
      new_data = g_malloc (size + enc->comp_settings_length);
      new_size = size + enc->comp_settings_length;

      memcpy (new_data, enc->comp_settings, enc->comp_settings_length);
      memcpy (new_data + enc->comp_settings_length, data, size);
    }
  } else {
    GST_ERROR ("invalid compression algorithm %d", algo);
    ret = FALSE;
  }

out:

  if (!ret) {
    *data_out = NULL;
    *size_out = 0;
  } else {
    *data_out = new_data;
    *size_out = new_size;
  }

  return ret;
}

233
234
235
236
237
238
239
240
241
242
243
GstFlowReturn
gst_matroska_decode_content_encodings (GArray * encodings)
{
  gint i;

  if (encodings == NULL)
    return GST_FLOW_OK;

  for (i = 0; i < encodings->len; i++) {
    GstMatroskaTrackEncoding *enc =
        &g_array_index (encodings, GstMatroskaTrackEncoding, i);
René Stadler's avatar
René Stadler committed
244
245
    gpointer data = NULL;
    gsize size;
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

    if ((enc->scope & GST_MATROSKA_TRACK_ENCODING_SCOPE_NEXT_CONTENT_ENCODING)
        == 0)
      continue;

    /* Encryption not supported yet */
    if (enc->type != 0)
      return GST_FLOW_ERROR;

    if (i + 1 >= encodings->len)
      return GST_FLOW_ERROR;

    if (enc->comp_settings_length == 0)
      continue;

    data = enc->comp_settings;
    size = enc->comp_settings_length;

    if (!gst_matroska_decompress_data (enc, &data, &size, enc->comp_algo))
      return GST_FLOW_ERROR;

    g_free (enc->comp_settings);

    enc->comp_settings = data;
    enc->comp_settings_length = size;
  }

  return GST_FLOW_OK;
}

gboolean
René Stadler's avatar
René Stadler committed
277
278
gst_matroska_decode_data (GArray * encodings, gpointer * data_out,
    gsize * size_out, GstMatroskaTrackEncodingScope scope, gboolean free)
279
{
René Stadler's avatar
René Stadler committed
280
281
  gpointer data;
  gsize size;
282
283
284
285
286
287
288
289
290
291
292
293
294
  gboolean ret = TRUE;
  gint i;

  g_return_val_if_fail (encodings != NULL, FALSE);
  g_return_val_if_fail (data_out != NULL && *data_out != NULL, FALSE);
  g_return_val_if_fail (size_out != NULL, FALSE);

  data = *data_out;
  size = *size_out;

  for (i = 0; i < encodings->len; i++) {
    GstMatroskaTrackEncoding *enc =
        &g_array_index (encodings, GstMatroskaTrackEncoding, i);
René Stadler's avatar
René Stadler committed
295
296
    gpointer new_data = NULL;
    gsize new_size = 0;
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

    if ((enc->scope & scope) == 0)
      continue;

    /* Encryption not supported yet */
    if (enc->type != 0) {
      ret = FALSE;
      break;
    }

    new_data = data;
    new_size = size;

    ret =
        gst_matroska_decompress_data (enc, &new_data, &new_size,
        enc->comp_algo);

    if (!ret)
      break;

    if ((data == *data_out && free) || (data != *data_out))
      g_free (data);

    data = new_data;
    size = new_size;
  }

  if (!ret) {
    if ((data == *data_out && free) || (data != *data_out))
      g_free (data);

    *data_out = NULL;
    *size_out = 0;
  } else {
    *data_out = data;
    *size_out = size;
  }

  return ret;
}

338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
static gint
gst_matroska_index_compare (GstMatroskaIndex * i1, GstMatroskaIndex * i2)
{
  if (i1->time < i2->time)
    return -1;
  else if (i1->time > i2->time)
    return 1;
  else if (i1->block < i2->block)
    return -1;
  else if (i1->block > i2->block)
    return 1;
  else
    return 0;
}

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
gint
gst_matroska_index_seek_find (GstMatroskaIndex * i1, GstClockTime * time,
    gpointer user_data)
{
  if (i1->time < *time)
    return -1;
  else if (i1->time > *time)
    return 1;
  else
    return 0;
}

GstMatroskaIndex *
gst_matroska_read_common_do_index_seek (GstMatroskaReadCommon * common,
    GstMatroskaTrackContext * track, gint64 seek_pos, GArray ** _index,
    gint * _entry_index)
{
  GstMatroskaIndex *entry = NULL;
  GArray *index;

  if (!common->index || !common->index->len)
    return NULL;

  /* find entry just before or at the requested position */
  if (track && track->index_table)
    index = track->index_table;
  else
    index = common->index;

  entry =
      gst_util_array_binary_search (index->data, index->len,
      sizeof (GstMatroskaIndex),
      (GCompareDataFunc) gst_matroska_index_seek_find, GST_SEARCH_MODE_BEFORE,
      &seek_pos, NULL);

  if (entry == NULL)
    entry = &g_array_index (index, GstMatroskaIndex, 0);

  if (_index)
    *_index = index;
  if (_entry_index)
    *_entry_index = entry - (GstMatroskaIndex *) index->data;

  return entry;
}

399
400
401
402
403
404
405
406
407
408
409
410
static gint
gst_matroska_read_common_encoding_cmp (GstMatroskaTrackEncoding * a,
    GstMatroskaTrackEncoding * b)
{
  if (b->order > a->order)
    return 1;
  else if (b->order < a->order)
    return -1;
  else
    return 0;
}

411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
static gboolean
gst_matroska_read_common_encoding_order_unique (GArray * encodings, guint64
    order)
{
  gint i;

  if (encodings == NULL || encodings->len == 0)
    return TRUE;

  for (i = 0; i < encodings->len; i++)
    if (g_array_index (encodings, GstMatroskaTrackEncoding, i).order == order)
      return FALSE;

  return TRUE;
}

427
428
429
430
431
432
433
434
435
436
/* takes ownership of taglist */
void
gst_matroska_read_common_found_global_tag (GstMatroskaReadCommon * common,
    GstElement * el, GstTagList * taglist)
{
  if (common->global_tags) {
    /* nothing sent yet, add to cache */
    gst_tag_list_insert (common->global_tags, taglist, GST_TAG_MERGE_APPEND);
    gst_tag_list_free (taglist);
  } else {
René Stadler's avatar
René Stadler committed
437
438
439
    GstEvent *tag_event = gst_event_new_tag (taglist);
    gint i;

440
441
442
    /* hm, already sent, no need to cache and wait anymore */
    GST_DEBUG_OBJECT (common, "Sending late global tags %" GST_PTR_FORMAT,
        taglist);
René Stadler's avatar
René Stadler committed
443
444
445
446
447
448
449
450
451

    for (i = 0; i < common->src->len; i++) {
      GstMatroskaTrackContext *stream;

      stream = g_ptr_array_index (common->src, i);
      gst_pad_push_event (stream->pad, gst_event_ref (tag_event));
    }

    gst_event_unref (tag_event);
452
453
454
  }
}

455
456
457
458
459
gint64
gst_matroska_read_common_get_length (GstMatroskaReadCommon * common)
{
  gint64 end = -1;

René Stadler's avatar
René Stadler committed
460
461
  if (!gst_pad_peer_query_duration (common->sinkpad, GST_FORMAT_BYTES,
          &end) || end < 0)
462
463
464
465
466
    GST_DEBUG_OBJECT (common, "no upstream length");

  return end;
}

467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
/* determine track to seek in */
GstMatroskaTrackContext *
gst_matroska_read_common_get_seek_track (GstMatroskaReadCommon * common,
    GstMatroskaTrackContext * track)
{
  gint i;

  if (track && track->type == GST_MATROSKA_TRACK_TYPE_VIDEO)
    return track;

  for (i = 0; i < common->src->len; i++) {
    GstMatroskaTrackContext *stream;

    stream = g_ptr_array_index (common->src, i);
    if (stream->type == GST_MATROSKA_TRACK_TYPE_VIDEO && stream->index_table)
      track = stream;
  }

  return track;
}

488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
/* skip unknown or alike element */
GstFlowReturn
gst_matroska_read_common_parse_skip (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, const gchar * parent_name, guint id)
{
  if (id == GST_EBML_ID_VOID) {
    GST_DEBUG_OBJECT (common, "Skipping EBML Void element");
  } else if (id == GST_EBML_ID_CRC32) {
    GST_DEBUG_OBJECT (common, "Skipping EBML CRC32 element");
  } else {
    GST_WARNING_OBJECT (common,
        "Unknown %s subelement 0x%x - ignoring", parent_name, id);
  }

  return gst_ebml_read_skip (ebml);
}

505
static GstFlowReturn
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
gst_matroska_read_common_parse_attached_file (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, GstTagList * taglist)
{
  guint32 id;
  GstFlowReturn ret;
  gchar *description = NULL;
  gchar *filename = NULL;
  gchar *mimetype = NULL;
  guint8 *data = NULL;
  guint64 datalen = 0;

  DEBUG_ELEMENT_START (common, ebml, "AttachedFile");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "AttachedFile", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    /* read all sub-entries */

    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_FILEDESCRIPTION:
        if (description) {
          GST_WARNING_OBJECT (common, "FileDescription can only appear once");
          break;
        }

        ret = gst_ebml_read_utf8 (ebml, &id, &description);
        GST_DEBUG_OBJECT (common, "FileDescription: %s",
            GST_STR_NULL (description));
        break;
      case GST_MATROSKA_ID_FILENAME:
        if (filename) {
          GST_WARNING_OBJECT (common, "FileName can only appear once");
          break;
        }

        ret = gst_ebml_read_utf8 (ebml, &id, &filename);

        GST_DEBUG_OBJECT (common, "FileName: %s", GST_STR_NULL (filename));
        break;
      case GST_MATROSKA_ID_FILEMIMETYPE:
        if (mimetype) {
          GST_WARNING_OBJECT (common, "FileMimeType can only appear once");
          break;
        }

        ret = gst_ebml_read_ascii (ebml, &id, &mimetype);
        GST_DEBUG_OBJECT (common, "FileMimeType: %s", GST_STR_NULL (mimetype));
        break;
      case GST_MATROSKA_ID_FILEDATA:
        if (data) {
          GST_WARNING_OBJECT (common, "FileData can only appear once");
          break;
        }

        ret = gst_ebml_read_binary (ebml, &id, &data, &datalen);
        GST_DEBUG_OBJECT (common, "FileData of size %" G_GUINT64_FORMAT,
            datalen);
        break;

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml,
            "AttachedFile", id);
        break;
      case GST_MATROSKA_ID_FILEUID:
        ret = gst_ebml_read_skip (ebml);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "AttachedFile", ret);

  if (filename && mimetype && data && datalen > 0) {
    GstTagImageType image_type = GST_TAG_IMAGE_TYPE_NONE;
    GstBuffer *tagbuffer = NULL;
Wim Taymans's avatar
Wim Taymans committed
586
587
588
    GstSample *tagsample = NULL;
    GstStructure *info = NULL;
    GstCaps *caps = NULL;
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
    gchar *filename_lc = g_utf8_strdown (filename, -1);

    GST_DEBUG_OBJECT (common, "Creating tag for attachment with "
        "filename '%s', mimetype '%s', description '%s', "
        "size %" G_GUINT64_FORMAT, filename, mimetype,
        GST_STR_NULL (description), datalen);

    /* TODO: better heuristics for different image types */
    if (strstr (filename_lc, "cover")) {
      if (strstr (filename_lc, "back"))
        image_type = GST_TAG_IMAGE_TYPE_BACK_COVER;
      else
        image_type = GST_TAG_IMAGE_TYPE_FRONT_COVER;
    } else if (g_str_has_prefix (mimetype, "image/") ||
        g_str_has_suffix (filename_lc, "png") ||
        g_str_has_suffix (filename_lc, "jpg") ||
        g_str_has_suffix (filename_lc, "jpeg") ||
        g_str_has_suffix (filename_lc, "gif") ||
        g_str_has_suffix (filename_lc, "bmp")) {
      image_type = GST_TAG_IMAGE_TYPE_UNDEFINED;
    }
    g_free (filename_lc);

    /* First try to create an image tag buffer from this */
    if (image_type != GST_TAG_IMAGE_TYPE_NONE) {
Wim Taymans's avatar
Wim Taymans committed
614
615
      tagsample =
          gst_tag_image_data_to_image_sample (data, datalen, image_type);
616

Wim Taymans's avatar
Wim Taymans committed
617
      if (!tagsample)
618
        image_type = GST_TAG_IMAGE_TYPE_NONE;
Wim Taymans's avatar
Wim Taymans committed
619
      else {
René Stadler's avatar
René Stadler committed
620
        data = NULL;
Wim Taymans's avatar
Wim Taymans committed
621
622
623
624
625
        tagbuffer = gst_buffer_ref (gst_sample_get_buffer (tagsample));
        caps = gst_caps_ref (gst_sample_get_caps (tagsample));
        info = gst_structure_copy (gst_sample_get_info (tagsample));
        gst_sample_unref (tagsample);
      }
626
627
628
629
    }

    /* if this failed create an attachment buffer */
    if (!tagbuffer) {
René Stadler's avatar
René Stadler committed
630
631
      tagbuffer = gst_buffer_new_wrapped (g_memdup (data, datalen), datalen);

Wim Taymans's avatar
Wim Taymans committed
632
633
634
      caps = gst_type_find_helper_for_buffer (NULL, tagbuffer, NULL);
      if (caps == NULL)
        caps = gst_caps_new_empty_simple (mimetype);
635
636
    }

Wim Taymans's avatar
Wim Taymans committed
637
638
639
640
641
642
643
644
645
    /* Set filename and description in the info */
    if (info == NULL)
      info = gst_structure_new_empty ("GstTagImageInfo");

    gst_structure_set (info, "filename", G_TYPE_STRING, filename, NULL);
    if (description)
      gst_structure_set (info, "description", G_TYPE_STRING, description, NULL);

    tagsample = gst_sample_new (tagbuffer, caps, NULL, info);
646

Wim Taymans's avatar
Wim Taymans committed
647
648
    GST_DEBUG_OBJECT (common,
        "Created attachment sample: %" GST_PTR_FORMAT, tagsample);
649
650
651

    /* and append to the tag list */
    if (image_type != GST_TAG_IMAGE_TYPE_NONE)
Wim Taymans's avatar
Wim Taymans committed
652
      gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, GST_TAG_IMAGE, tagsample,
653
654
655
          NULL);
    else
      gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, GST_TAG_ATTACHMENT,
Wim Taymans's avatar
Wim Taymans committed
656
          tagsample, NULL);
657

658
    /* the list adds it own ref */
659
    gst_sample_unref (tagsample);
660
661
662
663
664
665
666
667
668
669
  }

  g_free (filename);
  g_free (mimetype);
  g_free (data);
  g_free (description);

  return ret;
}

670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
GstFlowReturn
gst_matroska_read_common_parse_attachments (GstMatroskaReadCommon * common,
    GstElement * el, GstEbmlRead * ebml)
{
  guint32 id;
  GstFlowReturn ret = GST_FLOW_OK;
  GstTagList *taglist;

  DEBUG_ELEMENT_START (common, ebml, "Attachments");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "Attachments", ret);
    return ret;
  }

René Stadler's avatar
René Stadler committed
685
  taglist = gst_tag_list_new_empty ();
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_ATTACHEDFILE:
        ret = gst_matroska_read_common_parse_attached_file (common, ebml,
            taglist);
        break;

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml,
            "Attachments", id);
        break;
    }
  }
  DEBUG_ELEMENT_STOP (common, ebml, "Attachments", ret);

  if (gst_structure_n_fields (GST_STRUCTURE (taglist)) > 0) {
    GST_DEBUG_OBJECT (common, "Storing attachment tags");
    gst_matroska_read_common_found_global_tag (common, el, taglist);
  } else {
    GST_DEBUG_OBJECT (common, "No valid attachments found");
    gst_tag_list_free (taglist);
  }

  common->attachments_parsed = TRUE;

  return ret;
}

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
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
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
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
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
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
static void
gst_matroska_read_common_parse_toc_tag (GstTocEntry * entry,
    GArray * edition_targets, GArray * chapter_targtes, GstTagList * tags)
{
  gchar *uid;
  guint i;
  guint64 tgt;
  GArray *targets;
  GList *cur;

  targets =
      (entry->type ==
      GST_TOC_ENTRY_TYPE_EDITION) ? edition_targets : chapter_targtes;

  for (i = 0; i < targets->len; ++i) {
    tgt = g_array_index (targets, guint64, i);

    if (tgt == 0)
      gst_tag_list_insert (entry->tags, tags, GST_TAG_MERGE_APPEND);
    else {
      uid = g_strdup_printf ("%" G_GUINT64_FORMAT, tgt);
      if (g_strcmp0 (entry->uid, uid) == 0)
        gst_tag_list_insert (entry->tags, tags, GST_TAG_MERGE_APPEND);
      g_free (uid);
    }
  }

  cur = entry->subentries;
  while (cur != NULL) {
    gst_matroska_read_common_parse_toc_tag (cur->data, edition_targets,
        chapter_targtes, tags);
    cur = cur->next;
  }
}

static GstFlowReturn
gst_matroska_read_common_parse_metadata_targets (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, GArray * edition_targets, GArray * chapter_targets)
{
  GstFlowReturn ret = GST_FLOW_OK;
  guint32 id;
  guint64 uid;

  DEBUG_ELEMENT_START (common, ebml, "TagTargets");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "TagTargets", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_TARGETCHAPTERUID:
        if ((ret = gst_ebml_read_uint (ebml, &id, &uid)) == GST_FLOW_OK)
          g_array_append_val (chapter_targets, uid);
        break;

      case GST_MATROSKA_ID_TARGETEDITIONUID:
        if ((ret = gst_ebml_read_uint (ebml, &id, &uid)) == GST_FLOW_OK)
          g_array_append_val (edition_targets, uid);
        break;

      default:
        ret =
            gst_matroska_read_common_parse_skip (common, ebml, "TagTargets",
            id);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "TagTargets", ret);

  return ret;
}

static void
gst_matroska_read_common_postprocess_toc_entries (GList * toc_entries,
    guint64 max, const gchar * parent_uid)
{
  GstTocEntry *cur_info, *prev_info, *next_info;
  GList *cur_list, *prev_list, *next_list;
  gchar *iter_digit;
  gint i = 0;
  gint64 cur_start, prev_start, stop;

  cur_list = toc_entries;
  while (cur_list != NULL) {
    ++i;
    cur_info = cur_list->data;

    iter_digit = g_strdup_printf ("%d", i);

    switch (cur_info->type) {
      case GST_TOC_ENTRY_TYPE_EDITION:
        /* in Matroska terms edition has duration of full track */
        gst_toc_entry_set_start_stop (cur_info, 0, max);

        if (cur_info->uid == NULL)
          cur_info->uid =
              g_strconcat (parent_uid, "/", GST_MATROSKA_TOC_UID_EDITION,
              iter_digit, NULL);

        gst_matroska_read_common_postprocess_toc_entries (cur_info->subentries,
            max, cur_info->uid);
        break;

      case GST_TOC_ENTRY_TYPE_CHAPTER:
        prev_list = cur_list->prev;
        next_list = cur_list->next;

        if (prev_list != NULL)
          prev_info = prev_list->data;
        else
          prev_info = NULL;

        if (next_list != NULL)
          next_info = next_list->data;
        else
          next_info = NULL;

        if (cur_info->uid == NULL)
          cur_info->uid =
              g_strconcat (parent_uid, "/", GST_MATROSKA_TOC_UID_CHAPTER,
              iter_digit, NULL);

        /* updated stop time in previous chapter and it's subchapters */
        if (prev_info != NULL) {
          gst_toc_entry_get_start_stop (prev_info, &prev_start, &stop);
          gst_toc_entry_get_start_stop (cur_info, &cur_start, &stop);

          stop = cur_start;
          gst_toc_entry_set_start_stop (prev_info, prev_start, stop);

          gst_matroska_read_common_postprocess_toc_entries
              (prev_info->subentries, cur_start, prev_info->uid);
        }

        /* updated stop time in current chapter and it's subchapters */
        if (next_info == NULL) {
          gst_toc_entry_get_start_stop (cur_info, &cur_start, &stop);

          if (stop == -1) {
            stop = max;
            gst_toc_entry_set_start_stop (cur_info, cur_start, stop);
          }

          gst_matroska_read_common_postprocess_toc_entries
              (cur_info->subentries, stop, cur_info->uid);
        }
        break;
    }
    cur_list = cur_list->next;
    g_free (iter_digit);
  }
}

static GstFlowReturn
gst_matroska_read_common_parse_chapter_titles (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, GstTagList * titles)
{
  guint32 id;
  gchar *title = NULL;
  GstFlowReturn ret = GST_FLOW_OK;

  DEBUG_ELEMENT_START (common, ebml, "ChaptersTitles");


  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "ChaptersTitles", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_CHAPSTRING:
        ret = gst_ebml_read_utf8 (ebml, &id, &title);
        break;

      default:
        ret =
            gst_matroska_read_common_parse_skip (common, ebml, "ChaptersTitles",
            id);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "ChaptersTitles", ret);

  if (title != NULL && ret == GST_FLOW_OK)
    gst_tag_list_add (titles, GST_TAG_MERGE_APPEND, GST_TAG_TITLE, title, NULL);

  g_free (title);
  return ret;
}

static GstFlowReturn
gst_matroska_read_common_parse_chapter_element (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, GstTocEntry * toc_entry)
{
  guint32 id;
  guint64 start_time = -1, stop_time = -1;
  guint64 is_hidden = 0, is_enabled = 1, uid = 0;
  GstFlowReturn ret = GST_FLOW_OK;
  GstTocEntry *chapter_info;
  GstTagList *titles;

  DEBUG_ELEMENT_START (common, ebml, "ChaptersElement");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "ChaptersElement", ret);
    return ret;
  }

Stefan Sauer's avatar
Stefan Sauer committed
937
  titles = gst_tag_list_new_empty ();
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
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
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
  chapter_info = gst_toc_entry_new (GST_TOC_ENTRY_TYPE_CHAPTER,
      GST_MATROSKA_TOC_UID_EMPTY);

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_CHAPTERUID:
        ret = gst_ebml_read_uint (ebml, &id, &uid);
        break;

      case GST_MATROSKA_ID_CHAPTERTIMESTART:
        ret = gst_ebml_read_uint (ebml, &id, &start_time);
        break;

      case GST_MATROSKA_ID_CHAPTERTIMESTOP:
        ret = gst_ebml_read_uint (ebml, &id, &stop_time);
        break;

      case GST_MATROSKA_ID_CHAPTERATOM:
        ret =
            gst_matroska_read_common_parse_chapter_element (common, ebml,
            chapter_info);
        break;

      case GST_MATROSKA_ID_CHAPTERDISPLAY:
        ret =
            gst_matroska_read_common_parse_chapter_titles (common, ebml,
            titles);
        break;

      case GST_MATROSKA_ID_CHAPTERFLAGHIDDEN:
        ret = gst_ebml_read_uint (ebml, &id, &is_hidden);
        break;

      case GST_MATROSKA_ID_CHAPTERFLAGENABLED:
        ret = gst_ebml_read_uint (ebml, &id, &is_enabled);
        break;

      default:
        ret =
            gst_matroska_read_common_parse_skip (common, ebml,
            "ChaptersElement", id);
        break;
    }
  }

  gst_toc_entry_set_start_stop (chapter_info, start_time, stop_time);

  DEBUG_ELEMENT_STOP (common, ebml, "ChaptersElement", ret);

  g_free (chapter_info->uid);

  if (uid != 0)
    chapter_info->uid = g_strdup_printf ("%" G_GUINT64_FORMAT, uid);
  else
    chapter_info->uid = NULL;

  /* start time is mandatory and has no default value,
   * so we should skip chapters without it */
  if (is_hidden == 0 && is_enabled > 0 &&
      start_time != -1 && ret == GST_FLOW_OK) {
    if (!gst_tag_list_is_empty (titles))
      gst_tag_list_insert (chapter_info->tags, titles, GST_TAG_MERGE_APPEND);

    toc_entry->subentries = g_list_append (toc_entry->subentries, chapter_info);
  } else
    gst_toc_entry_free (chapter_info);

  gst_tag_list_free (titles);
  return ret;
}

static GstFlowReturn
gst_matroska_read_common_parse_chapter_edition (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, GstToc * toc)
{
  guint32 id;
  guint64 is_hidden = 0, uid = 0;
  GstFlowReturn ret = GST_FLOW_OK;
  GstTocEntry *edition_info;

  DEBUG_ELEMENT_START (common, ebml, "ChaptersEdition");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "ChaptersEdition", ret);
    return ret;
  }

  edition_info = gst_toc_entry_new (GST_TOC_ENTRY_TYPE_EDITION,
      GST_MATROSKA_TOC_UID_EMPTY);

  gst_toc_entry_set_start_stop (edition_info, -1, -1);

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_EDITIONUID:
        ret = gst_ebml_read_uint (ebml, &id, &uid);
        break;

      case GST_MATROSKA_ID_CHAPTERATOM:
        ret =
            gst_matroska_read_common_parse_chapter_element (common, ebml,
            edition_info);
        break;

      case GST_MATROSKA_ID_EDITIONFLAGHIDDEN:
        ret = gst_ebml_read_uint (ebml, &id, &is_hidden);
        break;

      default:
        ret =
            gst_matroska_read_common_parse_skip (common, ebml,
            "ChaptersEdition", id);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "ChaptersEdition", ret);

  g_free (edition_info->uid);

  if (uid != 0)
    edition_info->uid = g_strdup_printf ("%" G_GUINT64_FORMAT, uid);
  else
    edition_info->uid = NULL;

  if (is_hidden == 0 && edition_info->subentries != NULL && ret == GST_FLOW_OK)
    toc->entries = g_list_prepend (toc->entries, edition_info);
  else {
    GST_DEBUG_OBJECT (common,
        "Skipping empty or hidden edition in the chapters TOC");
    gst_toc_entry_free (edition_info);
  }

  return ret;
}

1080
1081
1082
1083
1084
1085
GstFlowReturn
gst_matroska_read_common_parse_chapters (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml)
{
  guint32 id;
  GstFlowReturn ret = GST_FLOW_OK;
1086
  GstToc *toc;
1087
1088
1089
1090
1091
1092
1093
1094

  DEBUG_ELEMENT_START (common, ebml, "Chapters");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "Chapters", ret);
    return ret;
  }

1095
1096
  toc = gst_toc_new ();

1097
1098
1099
1100
1101
  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
1102
1103
1104
1105
1106
      case GST_MATROSKA_ID_EDITIONENTRY:
        ret =
            gst_matroska_read_common_parse_chapter_edition (common, ebml, toc);
        break;

1107
      default:
1108
1109
        ret =
            gst_matroska_read_common_parse_skip (common, ebml, "Chapters", id);
1110
1111
1112
1113
        break;
    }
  }

1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
  if (toc->entries != NULL) {
    toc->entries = g_list_reverse (toc->entries);
    gst_matroska_read_common_postprocess_toc_entries (toc->entries,
        common->segment.duration, "");

    common->toc = toc;
  } else
    gst_toc_free (toc);

  common->chapters_parsed = TRUE;

1125
1126
1127
1128
  DEBUG_ELEMENT_STOP (common, ebml, "Chapters", ret);
  return ret;
}

1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
GstFlowReturn
gst_matroska_read_common_parse_header (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml)
{
  GstFlowReturn ret;
  gchar *doctype;
  guint version;
  guint32 id;

  /* this function is the first to be called */

  /* default init */
  doctype = NULL;
  version = 1;

  ret = gst_ebml_peek_id (ebml, &id);
  if (ret != GST_FLOW_OK)
    return ret;

  GST_DEBUG_OBJECT (common, "id: %08x", id);

  if (id != GST_EBML_ID_HEADER) {
    GST_ERROR_OBJECT (common, "Failed to read header");
    goto exit;
  }

  ret = gst_ebml_read_master (ebml, &id);
  if (ret != GST_FLOW_OK)
    return ret;

  while (gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    ret = gst_ebml_peek_id (ebml, &id);
    if (ret != GST_FLOW_OK)
      return ret;

    switch (id) {
        /* is our read version uptodate? */
      case GST_EBML_ID_EBMLREADVERSION:{
        guint64 num;

        ret = gst_ebml_read_uint (ebml, &id, &num);
        if (ret != GST_FLOW_OK)
          return ret;
        if (num != GST_EBML_VERSION) {
          GST_ERROR_OBJECT (ebml, "Unsupported EBML version %" G_GUINT64_FORMAT,
              num);
          return GST_FLOW_ERROR;
        }

        GST_DEBUG_OBJECT (ebml, "EbmlReadVersion: %" G_GUINT64_FORMAT, num);
        break;
      }

        /* we only handle 8 byte lengths at max */
      case GST_EBML_ID_EBMLMAXSIZELENGTH:{
        guint64 num;

        ret = gst_ebml_read_uint (ebml, &id, &num);
        if (ret != GST_FLOW_OK)
          return ret;
        if (num > sizeof (guint64)) {
          GST_ERROR_OBJECT (ebml,
              "Unsupported EBML maximum size %" G_GUINT64_FORMAT, num);
          return GST_FLOW_ERROR;
        }
        GST_DEBUG_OBJECT (ebml, "EbmlMaxSizeLength: %" G_GUINT64_FORMAT, num);
        break;
      }

        /* we handle 4 byte IDs at max */
      case GST_EBML_ID_EBMLMAXIDLENGTH:{
        guint64 num;

        ret = gst_ebml_read_uint (ebml, &id, &num);
        if (ret != GST_FLOW_OK)
          return ret;
        if (num > sizeof (guint32)) {
          GST_ERROR_OBJECT (ebml,
              "Unsupported EBML maximum ID %" G_GUINT64_FORMAT, num);
          return GST_FLOW_ERROR;
        }
        GST_DEBUG_OBJECT (ebml, "EbmlMaxIdLength: %" G_GUINT64_FORMAT, num);
        break;
      }

      case GST_EBML_ID_DOCTYPE:{
        gchar *text;

        ret = gst_ebml_read_ascii (ebml, &id, &text);
        if (ret != GST_FLOW_OK)
          return ret;

        GST_DEBUG_OBJECT (ebml, "EbmlDocType: %s", GST_STR_NULL (text));

        if (doctype)
          g_free (doctype);
        doctype = text;
        break;
      }

      case GST_EBML_ID_DOCTYPEREADVERSION:{
        guint64 num;

        ret = gst_ebml_read_uint (ebml, &id, &num);
        if (ret != GST_FLOW_OK)
          return ret;
        version = num;
        GST_DEBUG_OBJECT (ebml, "EbmlReadVersion: %" G_GUINT64_FORMAT, num);
        break;
      }

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml,
            "EBML header", id);
        if (ret != GST_FLOW_OK)
          return ret;
        break;

        /* we ignore these two, as they don't tell us anything we care about */
      case GST_EBML_ID_EBMLVERSION:
      case GST_EBML_ID_DOCTYPEVERSION:
        ret = gst_ebml_read_skip (ebml);
        if (ret != GST_FLOW_OK)
          return ret;
        break;
    }
  }

exit:

  if ((doctype != NULL && !strcmp (doctype, GST_MATROSKA_DOCTYPE_MATROSKA)) ||
      (doctype != NULL && !strcmp (doctype, GST_MATROSKA_DOCTYPE_WEBM)) ||
      (doctype == NULL)) {
    if (version <= 2) {
      if (doctype) {
        GST_INFO_OBJECT (common, "Input is %s version %d", doctype, version);
      } else {
        GST_WARNING_OBJECT (common, "Input is EBML without doctype, assuming "
            "matroska (version %d)", version);
      }
      ret = GST_FLOW_OK;
    } else {
      GST_ELEMENT_ERROR (common, STREAM, DEMUX, (NULL),
          ("Demuxer version (2) is too old to read %s version %d",
              GST_STR_NULL (doctype), version));
      ret = GST_FLOW_ERROR;
    }
    g_free (doctype);
  } else {
    GST_ELEMENT_ERROR (common, STREAM, WRONG_TYPE, (NULL),
        ("Input is not a matroska stream (doctype=%s)", doctype));
    ret = GST_FLOW_ERROR;
    g_free (doctype);
  }

  return ret;
}

1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
static GstFlowReturn
gst_matroska_read_common_parse_index_cuetrack (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, guint * nentries)
{
  guint32 id;
  GstFlowReturn ret;
  GstMatroskaIndex idx;

  idx.pos = (guint64) - 1;
  idx.track = 0;
  idx.time = GST_CLOCK_TIME_NONE;
  idx.block = 1;

  DEBUG_ELEMENT_START (common, ebml, "CueTrackPositions");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "CueTrackPositions", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
        /* track number */
      case GST_MATROSKA_ID_CUETRACK:
      {
        guint64 num;

        if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
          break;

        if (num == 0) {
          idx.track = 0;
          GST_WARNING_OBJECT (common, "Invalid CueTrack 0");
          break;
        }

        GST_DEBUG_OBJECT (common, "CueTrack: %" G_GUINT64_FORMAT, num);
        idx.track = num;
        break;
      }

        /* position in file */
      case GST_MATROSKA_ID_CUECLUSTERPOSITION:
      {
        guint64 num;

        if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
          break;

        if (num > G_MAXINT64) {
          GST_WARNING_OBJECT (common, "CueClusterPosition %" G_GUINT64_FORMAT
              " too large", num);
          break;
        }

        idx.pos = num;
        break;
      }

        /* number of block in the cluster */
      case GST_MATROSKA_ID_CUEBLOCKNUMBER:
      {
        guint64 num;

        if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
          break;

        if (num == 0) {
          GST_WARNING_OBJECT (common, "Invalid CueBlockNumber 0");
          break;
        }

        GST_DEBUG_OBJECT (common, "CueBlockNumber: %" G_GUINT64_FORMAT, num);
        idx.block = num;

        /* mild sanity check, disregard strange cases ... */
        if (idx.block > G_MAXUINT16) {
          GST_DEBUG_OBJECT (common, "... looks suspicious, ignoring");
          idx.block = 1;
        }
        break;
      }

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml,
            "CueTrackPositions", id);
        break;

      case GST_MATROSKA_ID_CUECODECSTATE:
      case GST_MATROSKA_ID_CUEREFERENCE:
        ret = gst_ebml_read_skip (ebml);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "CueTrackPositions", ret);

1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
  /* (e.g.) lavf typically creates entries without a block number,
   * which is bogus and leads to contradictory information */
  if (common->index->len) {
    GstMatroskaIndex *last_idx;

    last_idx = &g_array_index (common->index, GstMatroskaIndex,
        common->index->len - 1);
    if (last_idx->block == idx.block && last_idx->pos == idx.pos &&
        last_idx->track == idx.track && idx.time > last_idx->time) {
      GST_DEBUG_OBJECT (common, "Cue entry refers to same location, "
          "but has different time than previous entry; discarding");
      idx.track = 0;
    }
  }

1402
  if ((ret == GST_FLOW_OK || ret == GST_FLOW_EOS)
1403
1404
1405
      && idx.pos != (guint64) - 1 && idx.track > 0) {
    g_array_append_val (common->index, idx);
    (*nentries)++;
1406
  } else if (ret == GST_FLOW_OK || ret == GST_FLOW_EOS) {
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
    GST_DEBUG_OBJECT (common, "CueTrackPositions without valid content");
  }

  return ret;
}

static GstFlowReturn
gst_matroska_read_common_parse_index_pointentry (GstMatroskaReadCommon *
    common, GstEbmlRead * ebml)
{
  guint32 id;
  GstFlowReturn ret;
  GstClockTime time = GST_CLOCK_TIME_NONE;
  guint nentries = 0;

  DEBUG_ELEMENT_START (common, ebml, "CuePoint");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "CuePoint", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
        /* one single index entry ('point') */
      case GST_MATROSKA_ID_CUETIME:
      {
        if ((ret = gst_ebml_read_uint (ebml, &id, &time)) != GST_FLOW_OK)
          break;

        GST_DEBUG_OBJECT (common, "CueTime: %" G_GUINT64_FORMAT, time);
        time = time * common->time_scale;
        break;
      }

        /* position in the file + track to which it belongs */
      case GST_MATROSKA_ID_CUETRACKPOSITIONS:
      {
        if ((ret =
                gst_matroska_read_common_parse_index_cuetrack (common, ebml,
                    &nentries)) != GST_FLOW_OK)
          break;
        break;
      }

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml, "CuePoint",
            id);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "CuePoint", ret);

  if (nentries > 0) {
    if (time == GST_CLOCK_TIME_NONE) {
      GST_WARNING_OBJECT (common, "CuePoint without valid time");
      g_array_remove_range (common->index, common->index->len - nentries,
          nentries);
    } else {
      gint i;

      for (i = common->index->len - nentries; i < common->index->len; i++) {
        GstMatroskaIndex *idx =
            &g_array_index (common->index, GstMatroskaIndex, i);

        idx->time = time;
        GST_DEBUG_OBJECT (common, "Index entry: pos=%" G_GUINT64_FORMAT
            ", time=%" GST_TIME_FORMAT ", track=%u, block=%u", idx->pos,
            GST_TIME_ARGS (idx->time), (guint) idx->track, (guint) idx->block);
      }
    }
  } else {
    GST_DEBUG_OBJECT (common, "Empty CuePoint");
  }

  return ret;
}

gint
gst_matroska_read_common_stream_from_num (GstMatroskaReadCommon * common,
    guint track_num)
{
  guint n;

  g_assert (common->src->len == common->num_streams);
  for (n = 0; n < common->src->len; n++) {
    GstMatroskaTrackContext *context = g_ptr_array_index (common->src, n);

    if (context->num == track_num) {
      return n;
    }
  }

  if (n == common->num_streams)
    GST_WARNING_OBJECT (common,
        "Failed to find corresponding pad for tracknum %d", track_num);

  return -1;
}

GstFlowReturn
gst_matroska_read_common_parse_index (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml)
{
  guint32 id;
  GstFlowReturn ret = GST_FLOW_OK;
  guint i;

  if (common->index)
    g_array_free (common->index, TRUE);
  common->index =
      g_array_sized_new (FALSE, FALSE, sizeof (GstMatroskaIndex), 128);

  DEBUG_ELEMENT_START (common, ebml, "Cues");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "Cues", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
        /* one single index entry ('point') */
      case GST_MATROSKA_ID_POINTENTRY:
        ret = gst_matroska_read_common_parse_index_pointentry (common, ebml);
        break;

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml, "Cues", id);
        break;
    }
  }
  DEBUG_ELEMENT_STOP (common, ebml, "Cues", ret);

  /* Sort index by time, smallest time first, for easier searching */
  g_array_sort (common->index, (GCompareFunc) gst_matroska_index_compare);

  /* Now sort the track specific index entries into their own arrays */
  for (i = 0; i < common->index->len; i++) {
    GstMatroskaIndex *idx = &g_array_index (common->index, GstMatroskaIndex,
        i);
    gint track_num;
    GstMatroskaTrackContext *ctx;

1558
#if 0
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
    if (common->element_index) {
      gint writer_id;

      if (idx->track != 0 &&
          (track_num =
              gst_matroska_read_common_stream_from_num (common,
                  idx->track)) != -1) {
        ctx = g_ptr_array_index (common->src, track_num);

        if (ctx->index_writer_id == -1)
          gst_index_get_writer_id (common->element_index,
              GST_OBJECT (ctx->pad), &ctx->index_writer_id);
        writer_id = ctx->index_writer_id;
      } else {
        if (common->element_index_writer_id == -1)
          gst_index_get_writer_id (common->element_index, GST_OBJECT (common),
              &common->element_index_writer_id);
        writer_id = common->element_index_writer_id;
      }

      GST_LOG_OBJECT (common, "adding association %" GST_TIME_FORMAT "-> %"
          G_GUINT64_FORMAT " for writer id %d", GST_TIME_ARGS (idx->time),
          idx->pos, writer_id);
      gst_index_add_association (common->element_index, writer_id,
          GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, idx->time,
          GST_FORMAT_BYTES, idx->pos + common->ebml_segment_start, NULL);
    }
1586
#endif
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613

    if (idx->track == 0)
      continue;

    track_num = gst_matroska_read_common_stream_from_num (common, idx->track);
    if (track_num == -1)
      continue;

    ctx = g_ptr_array_index (common->src, track_num);

    if (ctx->index_table == NULL)
      ctx->index_table =
          g_array_sized_new (FALSE, FALSE, sizeof (GstMatroskaIndex), 128);

    g_array_append_vals (ctx->index_table, idx, 1);
  }

  common->index_parsed = TRUE;

  /* sanity check; empty index normalizes to no index */
  if (common->index->len == 0) {
    g_array_free (common->index, TRUE);
    common->index = NULL;
  }

  return ret;
}
1614

1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
GstFlowReturn
gst_matroska_read_common_parse_info (GstMatroskaReadCommon * common,
    GstElement * el, GstEbmlRead * ebml)
{
  GstFlowReturn ret = GST_FLOW_OK;
  gdouble dur_f = -1.0;
  guint32 id;

  DEBUG_ELEMENT_START (common, ebml, "SegmentInfo");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "SegmentInfo", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
        /* cluster timecode */
      case GST_MATROSKA_ID_TIMECODESCALE:{
        guint64 num;

        if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
          break;


        GST_DEBUG_OBJECT (common, "TimeCodeScale: %" G_GUINT64_FORMAT, num);
        common->time_scale = num;
        break;
      }

      case GST_MATROSKA_ID_DURATION:{
        if ((ret = gst_ebml_read_float (ebml, &id, &dur_f)) != GST_FLOW_OK)
          break;

        if (dur_f <= 0.0) {
          GST_WARNING_OBJECT (common, "Invalid duration %lf", dur_f);
          break;
        }

        GST_DEBUG_OBJECT (common, "Duration: %lf", dur_f);
        break;
      }

      case GST_MATROSKA_ID_WRITINGAPP:{
        gchar *text;

        if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK)
          break;

        GST_DEBUG_OBJECT (common, "WritingApp: %s", GST_STR_NULL (text));
        common->writing_app = text;
        break;
      }

      case GST_MATROSKA_ID_MUXINGAPP:{
        gchar *text;

        if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK)
          break;

        GST_DEBUG_OBJECT (common, "MuxingApp: %s", GST_STR_NULL (text));
        common->muxing_app = text;
        break;
      }

      case GST_MATROSKA_ID_DATEUTC:{
        gint64 time;

        if ((ret = gst_ebml_read_date (ebml, &id, &time)) != GST_FLOW_OK)
          break;

        GST_DEBUG_OBJECT (common, "DateUTC: %" G_GINT64_FORMAT, time);
        common->created = time;
        break;
      }

      case GST_MATROSKA_ID_TITLE:{
        gchar *text;
        GstTagList *taglist;

        if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK)
          break;

        GST_DEBUG_OBJECT (common, "Title: %s", GST_STR_NULL (text));
René Stadler's avatar
René Stadler committed
1702
        taglist = gst_tag_list_new (GST_TAG_TITLE, text, NULL);
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
        gst_matroska_read_common_found_global_tag (common, el, taglist);
        g_free (text);
        break;
      }

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml,
            "SegmentInfo", id);
        break;

        /* fall through */
      case GST_MATROSKA_ID_SEGMENTUID:
      case GST_MATROSKA_ID_SEGMENTFILENAME:
      case GST_MATROSKA_ID_PREVUID:
      case GST_MATROSKA_ID_PREVFILENAME:
      case GST_MATROSKA_ID_NEXTUID:
      case GST_MATROSKA_ID_NEXTFILENAME:
      case GST_MATROSKA_ID_SEGMENTFAMILY:
      case GST_MATROSKA_ID_CHAPTERTRANSLATE:
        ret = gst_ebml_read_skip (ebml);
        break;
    }
  }

  if (dur_f > 0.0) {
    GstClockTime dur_u;

    dur_u = gst_gdouble_to_guint64 (dur_f *
        gst_guint64_to_gdouble (common->time_scale));
    if (GST_CLOCK_TIME_IS_VALID (dur_u) && dur_u <= G_MAXINT64)
René Stadler's avatar
René Stadler committed
1733
      common->segment.duration = dur_u;
1734
1735
1736
1737
1738
1739
1740
1741
1742
  }

  DEBUG_ELEMENT_STOP (common, ebml, "SegmentInfo", ret);

  common->segmentinfo_parsed = TRUE;

  return ret;
}

1743
static GstFlowReturn
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
gst_matroska_read_common_parse_metadata_id_simple_tag (GstMatroskaReadCommon *
    common, GstEbmlRead * ebml, GstTagList ** p_taglist)
{
  /* FIXME: check if there are more useful mappings */
  static const struct
  {
    const gchar *matroska_tagname;
    const gchar *gstreamer_tagname;
  }
  tag_conv[] = {
    {
    GST_MATROSKA_TAG_ID_TITLE, GST_TAG_TITLE}, {
    GST_MATROSKA_TAG_ID_ARTIST, GST_TAG_ARTIST}, {
    GST_MATROSKA_TAG_ID_AUTHOR, GST_TAG_ARTIST}, {
    GST_MATROSKA_TAG_ID_ALBUM, GST_TAG_ALBUM}, {
    GST_MATROSKA_TAG_ID_COMMENTS, GST_TAG_COMMENT}, {
    GST_MATROSKA_TAG_ID_BITSPS, GST_TAG_BITRATE}, {
    GST_MATROSKA_TAG_ID_BPS, GST_TAG_BITRATE}, {
    GST_MATROSKA_TAG_ID_ENCODER, GST_TAG_ENCODER}, {
    GST_MATROSKA_TAG_ID_DATE, GST_TAG_DATE}, {
    GST_MATROSKA_TAG_ID_ISRC, GST_TAG_ISRC}, {
    GST_MATROSKA_TAG_ID_COPYRIGHT, GST_TAG_COPYRIGHT}, {
    GST_MATROSKA_TAG_ID_BPM, GST_TAG_BEATS_PER_MINUTE}, {
    GST_MATROSKA_TAG_ID_TERMS_OF_USE, GST_TAG_LICENSE}, {
    GST_MATROSKA_TAG_ID_COMPOSER, GST_TAG_COMPOSER}, {
    GST_MATROSKA_TAG_ID_LEAD_PERFORMER, GST_TAG_PERFORMER}, {
    GST_MATROSKA_TAG_ID_GENRE, GST_TAG_GENRE}
  };
  GstFlowReturn ret;
  guint32 id;
  gchar *value = NULL;
  gchar *tag = NULL;

  DEBUG_ELEMENT_START (common, ebml, "SimpleTag");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "SimpleTag", ret);
    return ret;
  }

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    /* read all sub-entries */

    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_TAGNAME:
        g_free (tag);
        tag = NULL;
        ret = gst_ebml_read_ascii (ebml, &id, &tag);
        GST_DEBUG_OBJECT (common, "TagName: %s", GST_STR_NULL (tag));
        break;

      case GST_MATROSKA_ID_TAGSTRING:
        g_free (value);
        value = NULL;
        ret = gst_ebml_read_utf8 (ebml, &id, &value);
        GST_DEBUG_OBJECT (common, "TagString: %s", GST_STR_NULL (value));
        break;

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml, "SimpleTag",
            id);
        break;
        /* fall-through */

      case GST_MATROSKA_ID_TAGLANGUAGE:
      case GST_MATROSKA_ID_TAGDEFAULT:
      case GST_MATROSKA_ID_TAGBINARY:
        ret = gst_ebml_read_skip (ebml);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "SimpleTag", ret);

  if (tag && value) {
    guint i;

    for (i = 0; i < G_N_ELEMENTS (tag_conv); i++) {
      const gchar *tagname_gst = tag_conv[i].gstreamer_tagname;

      const gchar *tagname_mkv = tag_conv[i].matroska_tagname;

      if (strcmp (tagname_mkv, tag) == 0) {
        GValue dest = { 0, };
        GType dest_type = gst_tag_get_type (tagname_gst);

        /* Ensure that any date string is complete */
1834
        if (dest_type == G_TYPE_DATE) {
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
          guint year = 1901, month = 1, day = 1;

          /* Dates can be yyyy-MM-dd, yyyy-MM or yyyy, but we need
           * the first type */
          if (sscanf (value, "%04u-%02u-%02u", &year, &month, &day) != 0) {
            g_free (value);
            value = g_strdup_printf ("%04u-%02u-%02u", year, month, day);
          }
        }

        g_value_init (&dest, dest_type);
        if (gst_value_deserialize (&dest, value)) {
          gst_tag_list_add_values (*p_taglist, GST_TAG_MERGE_APPEND,
              tagname_gst, &dest, NULL);
        } else {
          GST_WARNING_OBJECT (common, "Can't transform tag '%s' with "
              "value '%s' to target type '%s'", tag, value,
              g_type_name (dest_type));
        }
        g_value_unset (&dest);
        break;
      }
    }
  }

  g_free (tag);
  g_free (value);

  return ret;
}

1866
static GstFlowReturn
1867
1868
1869
1870
1871
gst_matroska_read_common_parse_metadata_id_tag (GstMatroskaReadCommon * common,
    GstEbmlRead * ebml, GstTagList ** p_taglist)
{
  guint32 id;
  GstFlowReturn ret;
1872
1873
1874
  GArray *chapter_targets, *edition_targets;
  GstTagList *taglist;
  GList *cur;
1875
1876
1877
1878
1879
1880
1881
1882

  DEBUG_ELEMENT_START (common, ebml, "Tag");

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "Tag", ret);
    return ret;
  }

1883
1884
  edition_targets = g_array_new (FALSE, FALSE, sizeof (guint64));
  chapter_targets = g_array_new (FALSE, FALSE, sizeof (guint64));
Stefan Sauer's avatar
Stefan Sauer committed
1885
  taglist = gst_tag_list_new_empty ();
1886

1887
1888
1889
1890
1891
1892
1893
1894
1895
  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    /* read all sub-entries */

    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_SIMPLETAG:
        ret = gst_matroska_read_common_parse_metadata_id_simple_tag (common,
1896
1897
1898
1899
1900
1901
1902
            ebml, &taglist);
        break;

      case GST_MATROSKA_ID_TARGETS:
        ret =
            gst_matroska_read_common_parse_metadata_targets (common, ebml,
            edition_targets, chapter_targets);
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
        break;

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml, "Tag", id);
        break;
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "Tag", ret);

1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
  /* if tag is chapter/edition specific - try to find that entry */
  if (G_UNLIKELY (chapter_targets->len > 0 || edition_targets->len > 0)) {
    if (common->toc == NULL)
      GST_WARNING_OBJECT (common,
          "Found chapter/edition specific tag, but TOC doesn't present");
    else {
      cur = common->toc->entries;
      while (cur != NULL) {
        gst_matroska_read_common_parse_toc_tag (cur->data, edition_targets,
            chapter_targets, taglist);
        cur = cur->next;
      }
      common->toc_updated = TRUE;
    }
  } else
    gst_tag_list_insert (*p_taglist, taglist, GST_TAG_MERGE_APPEND);

  gst_tag_list_free (taglist);
  g_array_unref (chapter_targets);
  g_array_unref (edition_targets);

1934
1935
1936
  return ret;
}

1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
GstFlowReturn
gst_matroska_read_common_parse_metadata (GstMatroskaReadCommon * common,
    GstElement * el, GstEbmlRead * ebml)
{
  GstTagList *taglist;
  GstFlowReturn ret = GST_FLOW_OK;
  guint32 id;
  GList *l;
  guint64 curpos;

  curpos = gst_ebml_read_get_pos (ebml);

  /* Make sure we don't parse a tags element twice and
   * post it's tags twice */
  curpos = gst_ebml_read_get_pos (ebml);
  for (l = common->tags_parsed; l; l = l->next) {
    guint64 *pos = l->data;

    if (*pos == curpos) {
      GST_DEBUG_OBJECT (common, "Skipping already parsed Tags at offset %"
          G_GUINT64_FORMAT, curpos);
      return GST_FLOW_OK;
    }
  }

  common->tags_parsed =
      g_list_prepend (common->tags_parsed, g_slice_new (guint64));
  *((guint64 *) common->tags_parsed->data) = curpos;
  /* fall-through */

  if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
    DEBUG_ELEMENT_STOP (common, ebml, "Tags", ret);
    return ret;
  }

René Stadler's avatar
René Stadler committed
1972
  taglist = gst_tag_list_new_empty ();
1973
  common->toc_updated = FALSE;
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993

  while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
    if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
      break;

    switch (id) {
      case GST_MATROSKA_ID_TAG:
        ret = gst_matroska_read_common_parse_metadata_id_tag (common, ebml,
            &taglist);
        break;

      default:
        ret = gst_matroska_read_common_parse_skip (common, ebml, "Tags", id);
        break;
        /* FIXME: Use to limit the tags to specific pads */
    }
  }

  DEBUG_ELEMENT_STOP (common, ebml, "Tags", ret);

1994
1995
1996
1997
  if (G_LIKELY (!gst_tag_list_is_empty (taglist)))
    gst_matroska_read_common_found_global_tag (common, el, taglist);
  else
    gst_tag_list_free (taglist);
1998
1999
2000
2001

  return ret;
}

Edward Hervey's avatar
Edward Hervey committed
2002
static GstFlowReturn
2003
gst_matroska_read_common_peek_adapter (GstMatroskaReadCommon * common, guint
Edward Hervey's avatar
Edward Hervey committed
2004
    peek, const guint8 ** data)
2005
{
René Stadler's avatar
René Stadler committed
2006
2007
  /* Caller needs to gst_adapter_unmap. */
  *data = gst_adapter_map (common->adapter, peek);
Edward Hervey's avatar
Edward Hervey committed
2008
  if (*data == NULL)
2009
    return GST_FLOW_EOS;
Edward Hervey's avatar
Edward Hervey committed
2010
2011

  return GST_FLOW_OK;
2012
2013
}

2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
/*
 * Calls pull_range for (offset,size) without advancing our offset
 */
GstFlowReturn
gst_matroska_read_common_peek_bytes (GstMatroskaReadCommon * common, guint64
    offset, guint size, GstBuffer ** p_buf, guint8 ** bytes)
{
  GstFlowReturn ret;

  /* Caching here actually makes much less difference than one would expect.
   * We do it mainly to avoid pulling buffers of 1 byte all the time */
  if (common->cached_buffer) {
    guint64 cache_offset = GST_BUFFER_OFFSET (common->cached_buffer);
René Stadler's avatar
René Stadler committed
2027
    gsize cache_size = gst_buffer_get_size (common->cached_buffer);
2028
2029
2030
2031

    if (cache_offset <= common->offset &&
        (common->offset + size) <= (cache_offset + cache_size)) {
      if (p_buf)
René Stadler's avatar
René Stadler committed
2032
2033
2034
        *p_buf = gst_buffer_copy_region (common->cached_buffer,
            GST_BUFFER_COPY_ALL, common->offset - cache_offset, size);
      if (bytes) {
Wim Taymans's avatar
Wim Taymans committed
2035
2036
2037
2038
2039
        if (!common->cached_data) {
          gst_buffer_map (common->cached_buffer, &common->cached_map,
              GST_MAP_READ);
          common->cached_data = common->cached_map.data;
        }
René Stadler's avatar
René Stadler committed
2040
2041
        *bytes = common->cached_data + common->offset - cache_offset;
      }
2042
2043
2044
      return GST_FLOW_OK;
    }
    /* not enough data in the cache, free cache and get a new one */
René Stadler's avatar
René Stadler committed
2045
    if (common->cached_data) {
Wim Taymans's avatar
Wim Taymans committed
2046
      gst_buffer_unmap (common->cached_buffer, &common->cached_map);
René Stadler's avatar
René Stadler committed
2047
2048
      common->cached_data = NULL;
    }
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
    gst_buffer_unref (common->cached_buffer);
    common->cached_buffer = NULL;
  }

  /* refill the cache */
  ret = gst_pad_pull_range (common->sinkpad, common->offset,
      MAX (size, 64 * 1024), &common->cached_buffer);
  if (ret != GST_FLOW_OK) {
    common->cached_buffer = NULL;
    return ret;
  }

René Stadler's avatar
René Stadler committed
2061
  if (gst_buffer_get_size (common->cached_buffer) >= size) {
2062
    if (p_buf)
René Stadler's avatar
René Stadler committed
2063
2064
2065
      *p_buf = gst_buffer_copy_region (common->cached_buffer,
          GST_BUFFER_COPY_ALL, 0, size);
    if (bytes) {
Wim Taymans's avatar
Wim Taymans committed
2066
2067
      gst_buffer_map (common->cached_buffer, &common->cached_map, GST_MAP_READ);
      common->cached_data = common->cached_map.data;
René Stadler's avatar
René Stadler committed
2068
2069
      *bytes = common->cached_data;
    }
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
    return GST_FLOW_OK;
  }

  /* Not possible to get enough data, try a last time with
   * requesting exactly the size we need */
  gst_buffer_unref (common->cached_buffer);
  common->cached_buffer = NULL;

  ret =
      gst_pad_pull_range (common->sinkpad, common->offset, size,
      &common->cached_buffer);
  if (ret != GST_FLOW_OK) {
    GST_DEBUG_OBJECT (common, "pull_range returned %d", ret);
    if (p_buf)
      *p_buf = NULL;
    if (bytes)
      *bytes = NULL;
    return ret;
  }

René Stadler's avatar
René Stadler committed
2090
  if (gst_buffer_get_size (common->cached_buffer) < size) {
2091
    GST_WARNING_OBJECT (common, "Dropping short buffer at offset %"
2092
2093
        G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
        common->offset, size, gst_buffer_get_size (common->cached_buffer));
2094
2095
2096
2097
2098
2099
2100

    gst_buffer_unref (common->cached_buffer);
    common->cached_buffer = NULL;
    if (p_buf)
      *p_buf = NULL;
    if (bytes)
      *bytes = NULL;
2101
    return GST_FLOW_EOS;
2102
2103
2104
  }

  if (p_buf)
René Stadler's avatar
René Stadler committed
2105
2106
2107
    *p_buf = gst_buffer_copy_region (common->cached_buffer,
        GST_BUFFER_COPY_ALL, 0, size);
  if (bytes) {
Wim Taymans's avatar
Wim Taymans committed
2108
2109
    gst_buffer_map (common->cached_buffer, &common->cached_map, GST_MAP_READ);
    common->cached_data = common->cached_map.data;
René Stadler's avatar
René Stadler committed
2110
2111
    *bytes = common->cached_data;
  }
2112
2113
2114
2115

  return GST_FLOW_OK;
}

2116
2117
2118
static GstFlowReturn
gst_matroska_read_common_peek_pull (GstMatroskaReadCommon * common, guint peek,
    guint8 ** data)
2119
{
2120
2121
  return gst_matroska_read_common_peek_bytes (common, common->offset, peek,
      NULL, data);
2122
2123
}

2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
GstFlowReturn
gst_matroska_read_common_peek_id_length_pull (GstMatroskaReadCommon * common,
    GstElement * el, guint32 * _id, guint64 * _length, guint * _needed)
{
  return gst_ebml_peek_id_length (_id, _length, _needed,
      (GstPeekData) gst_matroska_read_common_peek_pull, (gpointer) common, el,
      common->offset);
}

GstFlowReturn
gst_matroska_read_common_peek_id_length_push (GstMatroskaReadCommon * common,
    GstElement * el, guint32 * _id, guint64 * _length, guint * _needed)
{
René Stadler's avatar
René Stadler committed
2137
2138
2139
  GstFlowReturn ret;

  ret = gst_ebml_peek_id_length (_id, _length, _needed,
2140
2141
      (GstPeekData) gst_matroska_read_common_peek_adapter, (gpointer) common,
      el, common->offset);
René Stadler's avatar
René Stadler committed
2142
2143
2144
2145

  gst_adapter_unmap (common->adapter);

  return ret;
2146
2147
}

2148
static GstFlowReturn
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199