1
/* Quicktime muxer plugin for GStreamer
2
* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
4
* This library is free software; you can redistribute it and/or
5
* modify it under the terms of the GNU Library General Public
6
* License as published by the Free Software Foundation; either
7
* version 2 of the License, or (at your option) any later version.
9
* This library is distributed in the hope that it will be useful,
10
* but WITHOUT ANY WARRANTY; without even the implied warranty of
11
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
* Library General Public License for more details.
14
* You should have received a copy of the GNU Library General Public
15
* License along with this library; if not, write to the
16
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17
* Boston, MA 02111-1307, USA.
20
* Unless otherwise indicated, Source Code is licensed under MIT license.
21
* See further explanation attached in License Statement (distributed in the file
24
* Permission is hereby granted, free of charge, to any person obtaining a copy of
25
* this software and associated documentation files (the "Software"), to deal in
26
* the Software without restriction, including without limitation the rights to
27
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
28
* of the Software, and to permit persons to whom the Software is furnished to do
29
* so, subject to the following conditions:
31
* The above copyright notice and this permission notice shall be included in all
32
* copies or substantial portions of the Software.
34
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
35
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
36
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
37
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
38
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
39
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
44
* This module contains functions for serializing partial information from
45
* a mux in progress (by qtmux elements). This enables reconstruction of the
46
* moov box if a crash happens and thus recovering the movie file.
49
* 1) pipeline: ...yourelements ! qtmux moov-recovery-file=path.mrf ! \
50
* filesink location=moovie.mov
54
* 3) gst-launch qtmoovrecover recovery-input=path.mrf broken-input=moovie.mov \
55
fixed-output=recovered.mov
57
* 4) (Hopefully) enjoy recovered.mov.
59
* --- Recovery file layout ---
60
* 1) Version (a guint16)
61
* 2) Prefix atom (if present)
63
* 4) MVHD atom (without timescale/duration set)
66
* 7) list of trak atoms (stbl data is ignored, except for the stsd atom)
67
* 8) Buffers metadata (metadata that is relevant to the container)
68
* Buffers metadata are stored in the order they are added to the mdat,
69
* each entre has a fixed size and is stored in BE. booleans are stored
70
* as a single byte where 0 means false, otherwise is true.
76
* - guint64 chunk_offset;
79
* - guint64 pts_offset; (always present, ignored if do_pts is false)
81
* The mdat file might contain ftyp and then mdat, in case this is the faststart
82
* temporary file there is no ftyp and no mdat header, only the buffers data.
84
* Notes about recovery file layout: We still don't store tags nor EDTS data.
86
* IMPORTANT: this is still at a experimental state.
89
#include "atomsrecovery.h"
91
#define ATOMS_RECOV_OUTPUT_WRITE_ERROR(err) \
92
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE, \
93
"Failed to write to output file: %s", g_strerror (errno))
96
atoms_recov_write_version (FILE * f)
99
GST_WRITE_UINT16_BE (data, ATOMS_RECOV_FILE_VERSION);
100
return fwrite (data, 2, 1, f) == 1;
104
atoms_recov_write_ftyp_info (FILE * f, AtomFTYP * ftyp, GstBuffer * prefix)
111
if (fwrite (GST_BUFFER_DATA (prefix), 1, GST_BUFFER_SIZE (prefix), f) !=
112
GST_BUFFER_SIZE (prefix)) {
116
if (!atom_ftyp_copy_data (ftyp, &data, &size, &offset)) {
119
if (fwrite (data, 1, offset, f) != offset) {
126
* Writes important info on the 'moov' atom (non-trak related)
127
* to be able to recover the moov structure after a crash.
129
* Currently, it writes the MVHD atom.
132
atoms_recov_write_moov_info (FILE * f, AtomMOOV * moov)
137
guint64 atom_size = 0;
142
data = g_malloc (size);
143
atom_size = atom_mvhd_copy_data (&moov->mvhd, &data, &size, &offset);
145
writen = fwrite (data, 1, atom_size, f);
147
return atom_size > 0 && writen == atom_size;
151
* Writes the number of traks to the file.
152
* This simply writes a guint32 in BE.
155
atoms_recov_write_traks_number (FILE * f, guint32 traks)
158
GST_WRITE_UINT32_BE (data, traks);
159
return fwrite (data, 4, 1, f) == 1;
163
* Writes the moov's timescale to the file
164
* This simply writes a guint32 in BE.
167
atoms_recov_write_moov_timescale (FILE * f, guint32 timescale)
170
GST_WRITE_UINT32_BE (data, timescale);
171
return fwrite (data, 4, 1, f) == 1;
175
* Writes the trak atom to the file.
178
atoms_recov_write_trak_info (FILE * f, AtomTRAK * trak)
183
guint64 atom_size = 0;
186
/* buffer is realloced to a larger size if needed */
188
data = g_malloc (size);
189
atom_size = atom_trak_copy_data (trak, &data, &size, &offset);
191
writen = fwrite (data, atom_size, 1, f);
193
return atom_size > 0 && writen == atom_size;
197
atoms_recov_write_trak_samples (FILE * f, AtomTRAK * trak, guint32 nsamples,
198
guint32 delta, guint32 size, guint64 chunk_offset, gboolean sync,
199
gboolean do_pts, gint64 pts_offset)
201
guint8 data[TRAK_BUFFER_ENTRY_INFO_SIZE];
203
* We have to write a TrakBufferEntryInfo
205
GST_WRITE_UINT32_BE (data + 0, trak->tkhd.track_ID);
206
GST_WRITE_UINT32_BE (data + 4, nsamples);
207
GST_WRITE_UINT32_BE (data + 8, delta);
208
GST_WRITE_UINT32_BE (data + 12, size);
209
GST_WRITE_UINT64_BE (data + 16, chunk_offset);
211
GST_WRITE_UINT8 (data + 24, 1);
213
GST_WRITE_UINT8 (data + 24, 0);
215
GST_WRITE_UINT8 (data + 25, 1);
216
GST_WRITE_UINT64_BE (data + 26, pts_offset);
218
GST_WRITE_UINT8 (data + 25, 0);
219
GST_WRITE_UINT64_BE (data + 26, 0);
222
return fwrite (data, 1, TRAK_BUFFER_ENTRY_INFO_SIZE, f) ==
223
TRAK_BUFFER_ENTRY_INFO_SIZE;
227
atoms_recov_write_headers (FILE * f, AtomFTYP * ftyp, GstBuffer * prefix,
228
AtomMOOV * moov, guint32 timescale, guint32 traks_number)
230
if (!atoms_recov_write_version (f)) {
234
if (!atoms_recov_write_ftyp_info (f, ftyp, prefix)) {
238
if (!atoms_recov_write_moov_info (f, moov)) {
242
if (!atoms_recov_write_moov_timescale (f, timescale)) {
246
if (!atoms_recov_write_traks_number (f, traks_number)) {
254
read_atom_header (FILE * f, guint32 * fourcc, guint32 * size)
258
if (fread (aux, 1, 8, f) != 8)
260
*size = GST_READ_UINT32_BE (aux);
261
*fourcc = GST_READ_UINT32_LE (aux + 4);
266
moov_recov_file_parse_prefix (MoovRecovFile * moovrf)
270
guint32 total_size = 0;
271
if (fseek (moovrf->file, 2, SEEK_SET) != 0)
273
if (!read_atom_header (moovrf->file, &fourcc, &size)) {
277
if (fourcc != FOURCC_ftyp) {
278
/* we might have a prefix here */
279
if (fseek (moovrf->file, size - 8, SEEK_CUR) != 0)
284
/* now read the ftyp */
285
if (!read_atom_header (moovrf->file, &fourcc, &size))
289
/* this has to be the ftyp */
290
if (fourcc != FOURCC_ftyp)
293
moovrf->prefix_size = total_size;
294
return fseek (moovrf->file, size - 8, SEEK_CUR) == 0;
298
moov_recov_file_parse_mvhd (MoovRecovFile * moovrf)
302
if (!read_atom_header (moovrf->file, &fourcc, &size)) {
305
/* check for sanity */
306
if (fourcc != FOURCC_mvhd)
309
moovrf->mvhd_size = size;
310
moovrf->mvhd_pos = ftell (moovrf->file) - 8;
312
/* skip the remaining of the mvhd in the file */
313
return fseek (moovrf->file, size - 8, SEEK_CUR) == 0;
317
mdat_recov_file_parse_mdat_start (MdatRecovFile * mdatrf)
319
guint32 fourcc, size;
321
if (!read_atom_header (mdatrf->file, &fourcc, &size)) {
325
mdatrf->mdat_header_size = 16;
326
mdatrf->mdat_size = 16;
328
mdatrf->mdat_header_size = 8;
329
mdatrf->mdat_size = 8;
331
mdatrf->mdat_start = ftell (mdatrf->file) - 8;
333
return fourcc == FOURCC_mdat;
337
mdat_recov_file_create (FILE * file, gboolean datafile, GError ** err)
339
MdatRecovFile *mrf = g_new0 (MdatRecovFile, 1);
340
guint32 fourcc, size;
342
g_return_val_if_fail (file != NULL, NULL);
345
mrf->rawfile = datafile;
347
/* get the file/data length */
348
if (fseek (file, 0, SEEK_END) != 0)
349
goto file_length_error;
350
/* still needs to deduce the mdat header and ftyp size */
351
mrf->data_size = ftell (file);
352
if (mrf->data_size == -1L)
353
goto file_length_error;
355
if (fseek (file, 0, SEEK_SET) != 0)
356
goto file_seek_error;
359
/* this file contains no atoms, only raw data to be placed on the mdat
360
* this happens when faststart mode is used */
362
mrf->mdat_header_size = 16;
367
if (!read_atom_header (file, &fourcc, &size)) {
370
if (fourcc != FOURCC_ftyp) {
371
/* this could be a prefix atom, let's skip it and try again */
372
if (fseek (file, size - 8, SEEK_CUR) != 0) {
373
goto file_seek_error;
375
if (!read_atom_header (file, &fourcc, &size)) {
380
if (fourcc != FOURCC_ftyp) {
383
if (fseek (file, size - 8, SEEK_CUR) != 0)
384
goto file_seek_error;
386
/* we don't parse this if we have a tmpdatafile */
387
if (!mdat_recov_file_parse_mdat_start (mrf)) {
388
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_PARSING,
389
"Error while parsing mdat atom");
396
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE,
397
"Failed to parse atom");
401
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE,
402
"Failed to seek to start of the file");
406
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE,
407
"Failed to determine file size");
411
mdat_recov_file_free (mrf);
416
mdat_recov_file_free (MdatRecovFile * mrf)
423
moov_recov_parse_num_traks (MoovRecovFile * moovrf)
426
if (fread (traks, 1, 4, moovrf->file) != 4)
428
moovrf->num_traks = GST_READ_UINT32_BE (traks);
433
moov_recov_parse_moov_timescale (MoovRecovFile * moovrf)
436
if (fread (ts, 1, 4, moovrf->file) != 4)
438
moovrf->timescale = GST_READ_UINT32_BE (ts);
443
skip_atom (MoovRecovFile * moovrf, guint32 expected_fourcc)
448
if (!read_atom_header (moovrf->file, &fourcc, &size))
450
if (fourcc != expected_fourcc)
453
return (fseek (moovrf->file, size - 8, SEEK_CUR) == 0);
457
moov_recov_parse_tkhd (MoovRecovFile * moovrf, TrakRecovData * trakrd)
463
/* make sure we are on a tkhd atom */
464
if (!read_atom_header (moovrf->file, &fourcc, &size))
466
if (fourcc != FOURCC_tkhd)
469
trakrd->tkhd_file_offset = ftell (moovrf->file) - 8;
471
/* move 8 bytes forward to the trak_id pos */
472
if (fseek (moovrf->file, 12, SEEK_CUR) != 0)
474
if (fread (data, 1, 4, moovrf->file) != 4)
477
/* advance the rest of tkhd */
478
fseek (moovrf->file, 68, SEEK_CUR);
480
trakrd->trak_id = GST_READ_UINT32_BE (data);
485
moov_recov_parse_stbl (MoovRecovFile * moovrf, TrakRecovData * trakrd)
491
if (!read_atom_header (moovrf->file, &fourcc, &size))
493
if (fourcc != FOURCC_stbl)
496
trakrd->stbl_file_offset = ftell (moovrf->file) - 8;
497
trakrd->stbl_size = size;
500
if (!read_atom_header (moovrf->file, &fourcc, &auxsize))
502
if (fourcc != FOURCC_stsd)
504
if (fseek (moovrf->file, auxsize - 8, SEEK_CUR) != 0)
507
trakrd->stsd_size = auxsize;
508
trakrd->post_stsd_offset = ftell (moovrf->file);
510
/* as this is the last atom we parse, we don't skip forward */
516
moov_recov_parse_minf (MoovRecovFile * moovrf, TrakRecovData * trakrd)
522
if (!read_atom_header (moovrf->file, &fourcc, &size))
524
if (fourcc != FOURCC_minf)
527
trakrd->minf_file_offset = ftell (moovrf->file) - 8;
528
trakrd->minf_size = size;
530
/* skip either of vmhd, smhd, hmhd that might follow */
531
if (!read_atom_header (moovrf->file, &fourcc, &auxsize))
533
if (fourcc != FOURCC_vmhd && fourcc != FOURCC_smhd && fourcc != FOURCC_hmhd &&
534
fourcc != FOURCC_gmhd)
536
if (fseek (moovrf->file, auxsize - 8, SEEK_CUR))
539
/* skip a possible hdlr and the following dinf */
540
if (!read_atom_header (moovrf->file, &fourcc, &auxsize))
542
if (fourcc == FOURCC_hdlr) {
543
if (fseek (moovrf->file, auxsize - 8, SEEK_CUR))
545
if (!read_atom_header (moovrf->file, &fourcc, &auxsize))
548
if (fourcc != FOURCC_dinf)
550
if (fseek (moovrf->file, auxsize - 8, SEEK_CUR))
553
/* now we are ready to read the stbl */
554
if (!moov_recov_parse_stbl (moovrf, trakrd))
561
moov_recov_parse_mdhd (MoovRecovFile * moovrf, TrakRecovData * trakrd)
567
/* make sure we are on a tkhd atom */
568
if (!read_atom_header (moovrf->file, &fourcc, &size))
570
if (fourcc != FOURCC_mdhd)
573
trakrd->mdhd_file_offset = ftell (moovrf->file) - 8;
575
/* get the timescale */
576
if (fseek (moovrf->file, 12, SEEK_CUR) != 0)
578
if (fread (data, 1, 4, moovrf->file) != 4)
580
trakrd->timescale = GST_READ_UINT32_BE (data);
581
if (fseek (moovrf->file, 8, SEEK_CUR) != 0)
587
moov_recov_parse_mdia (MoovRecovFile * moovrf, TrakRecovData * trakrd)
592
/* make sure we are on a tkhd atom */
593
if (!read_atom_header (moovrf->file, &fourcc, &size))
595
if (fourcc != FOURCC_mdia)
598
trakrd->mdia_file_offset = ftell (moovrf->file) - 8;
599
trakrd->mdia_size = size;
601
if (!moov_recov_parse_mdhd (moovrf, trakrd))
604
if (!skip_atom (moovrf, FOURCC_hdlr))
606
if (!moov_recov_parse_minf (moovrf, trakrd))
612
moov_recov_parse_trak (MoovRecovFile * moovrf, TrakRecovData * trakrd)
618
offset = ftell (moovrf->file);
623
/* make sure we are on a trak atom */
624
if (!read_atom_header (moovrf->file, &fourcc, &size)) {
627
if (fourcc != FOURCC_trak) {
630
trakrd->trak_size = size;
632
/* now we should have a trak header 'tkhd' */
633
if (!moov_recov_parse_tkhd (moovrf, trakrd))
636
/* FIXME add edts handling here and in qtmux, as this is only detected
637
* after buffers start flowing */
639
if (!moov_recov_parse_mdia (moovrf, trakrd))
642
trakrd->file_offset = offset;
643
/* position after the trak */
644
return fseek (moovrf->file, (long int) offset + size, SEEK_SET) == 0;
648
moov_recov_file_create (FILE * file, GError ** err)
651
MoovRecovFile *moovrf = g_new0 (MoovRecovFile, 1);
653
g_return_val_if_fail (file != NULL, NULL);
657
/* look for ftyp and prefix at the start */
658
if (!moov_recov_file_parse_prefix (moovrf)) {
659
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_PARSING,
660
"Error while parsing prefix atoms");
665
if (!moov_recov_file_parse_mvhd (moovrf)) {
666
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_PARSING,
667
"Error while parsing mvhd atom");
671
if (!moov_recov_parse_moov_timescale (moovrf)) {
672
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_PARSING,
673
"Error while parsing timescale");
676
if (!moov_recov_parse_num_traks (moovrf)) {
677
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_PARSING,
678
"Error while parsing parsing number of traks");
683
moovrf->traks_rd = g_new0 (TrakRecovData, moovrf->num_traks);
684
for (i = 0; i < moovrf->num_traks; i++) {
685
atom_stbl_init (&(moovrf->traks_rd[i].stbl));
687
for (i = 0; i < moovrf->num_traks; i++) {
688
if (!moov_recov_parse_trak (moovrf, &(moovrf->traks_rd[i]))) {
689
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_PARSING,
690
"Error while parsing trak atom");
698
moov_recov_file_free (moovrf);
703
moov_recov_file_free (MoovRecovFile * moovrf)
706
fclose (moovrf->file);
707
if (moovrf->traks_rd) {
708
for (i = 0; i < moovrf->num_traks; i++) {
709
atom_stbl_clear (&(moovrf->traks_rd[i].stbl));
711
g_free (moovrf->traks_rd);
717
moov_recov_parse_buffer_entry (MoovRecovFile * moovrf, TrakBufferEntryInfo * b)
719
guint8 data[TRAK_BUFFER_ENTRY_INFO_SIZE];
722
read = fread (data, 1, TRAK_BUFFER_ENTRY_INFO_SIZE, moovrf->file);
723
if (read != TRAK_BUFFER_ENTRY_INFO_SIZE)
726
b->track_id = GST_READ_UINT32_BE (data);
727
b->nsamples = GST_READ_UINT32_BE (data + 4);
728
b->delta = GST_READ_UINT32_BE (data + 8);
729
b->size = GST_READ_UINT32_BE (data + 12);
730
b->chunk_offset = GST_READ_UINT64_BE (data + 16);
731
b->sync = data[24] != 0;
732
b->do_pts = data[25] != 0;
733
b->pts_offset = GST_READ_UINT64_BE (data + 26);
738
mdat_recov_add_sample (MdatRecovFile * mdatrf, guint32 size)
740
/* test if this data exists */
741
if (mdatrf->mdat_size - mdatrf->mdat_header_size + size > mdatrf->data_size)
744
mdatrf->mdat_size += size;
748
static TrakRecovData *
749
moov_recov_get_trak (MoovRecovFile * moovrf, guint32 id)
752
for (i = 0; i < moovrf->num_traks; i++) {
753
if (moovrf->traks_rd[i].trak_id == id)
754
return &(moovrf->traks_rd[i]);
760
trak_recov_data_add_sample (TrakRecovData * trak, TrakBufferEntryInfo * b)
762
trak->duration += b->nsamples * b->delta;
763
atom_stbl_add_samples (&trak->stbl, b->nsamples, b->delta, b->size,
764
b->chunk_offset, b->sync, b->pts_offset);
768
* Parses the buffer entries in the MoovRecovFile and matches the inputs
769
* with the data in the MdatRecovFile. Whenever a buffer entry of that
770
* represents 'x' bytes of data, the same amount of data is 'validated' in
771
* the MdatRecovFile and will be inluded in the generated moovie file.
774
moov_recov_parse_buffers (MoovRecovFile * moovrf, MdatRecovFile * mdatrf,
777
TrakBufferEntryInfo entry;
780
/* we assume both moovrf and mdatrf are at the starting points of their
782
while (moov_recov_parse_buffer_entry (moovrf, &entry)) {
783
/* be sure we still have this data in mdat */
784
trak = moov_recov_get_trak (moovrf, entry.track_id);
786
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_PARSING,
787
"Invalid trak id found in buffer entry");
790
if (!mdat_recov_add_sample (mdatrf, entry.size))
792
trak_recov_data_add_sample (trak, &entry);
798
trak_recov_data_get_trak_atom_size (TrakRecovData * trak)
800
AtomSTBL *stbl = &trak->stbl;
803
/* write out our stbl child atoms */
806
if (!atom_stts_copy_data (&stbl->stts, NULL, NULL, &offset)) {
809
if (atom_array_get_len (&stbl->stss.entries) > 0) {
810
if (!atom_stss_copy_data (&stbl->stss, NULL, NULL, &offset)) {
814
if (!atom_stsc_copy_data (&stbl->stsc, NULL, NULL, &offset)) {
817
if (!atom_stsz_copy_data (&stbl->stsz, NULL, NULL, &offset)) {
821
if (!atom_ctts_copy_data (stbl->ctts, NULL, NULL, &offset)) {
825
if (!atom_stco64_copy_data (&stbl->stco64, NULL, NULL, &offset)) {
829
return trak->trak_size + ((trak->stsd_size + offset + 8) - trak->stbl_size);
836
moov_recov_get_stbl_children_data (MoovRecovFile * moovrf, TrakRecovData * trak,
839
AtomSTBL *stbl = &trak->stbl;
844
/* write out our stbl child atoms
846
* Use 1MB as a starting size, *_copy_data functions
847
* will grow the buffer if needed.
850
buffer = g_malloc0 (size);
853
if (!atom_stts_copy_data (&stbl->stts, &buffer, &size, &offset)) {
856
if (atom_array_get_len (&stbl->stss.entries) > 0) {
857
if (!atom_stss_copy_data (&stbl->stss, &buffer, &size, &offset)) {
861
if (!atom_stsc_copy_data (&stbl->stsc, &buffer, &size, &offset)) {
864
if (!atom_stsz_copy_data (&stbl->stsz, &buffer, &size, &offset)) {
868
if (!atom_ctts_copy_data (stbl->ctts, &buffer, &size, &offset)) {
872
if (!atom_stco64_copy_data (&stbl->stco64, &buffer, &size, &offset)) {
884
moov_recov_write_file (MoovRecovFile * moovrf, MdatRecovFile * mdatrf,
885
FILE * outf, GError ** err)
889
guint8 *prefix_data = NULL;
890
guint8 *mvhd_data = NULL;
891
guint8 *trak_data = NULL;
892
guint32 moov_size = 0;
894
guint64 stbl_children_size = 0;
895
guint8 *stbl_children = NULL;
896
guint32 longest_duration = 0;
899
/* check the version */
900
if (fseek (moovrf->file, 0, SEEK_SET) != 0) {
901
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE,
902
"Failed to seek to the start of the moov recovery file");
905
if (fread (auxdata, 1, 2, moovrf->file) != 2) {
906
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE,
907
"Failed to read version from file");
910
version = GST_READ_UINT16_BE (auxdata);
911
if (version != ATOMS_RECOV_FILE_VERSION) {
912
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_VERSION,
913
"Input file version (%u) is not supported in this version (%u)",
914
version, ATOMS_RECOV_FILE_VERSION);
919
prefix_data = g_malloc (moovrf->prefix_size);
920
if (fread (prefix_data, 1, moovrf->prefix_size,
921
moovrf->file) != moovrf->prefix_size) {
922
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE,
923
"Failed to read the ftyp atom from file");
926
if (fwrite (prefix_data, 1, moovrf->prefix_size, outf) != moovrf->prefix_size) {
927
ATOMS_RECOV_OUTPUT_WRITE_ERROR (err);
930
g_free (prefix_data);
933
/* need to calculate the moov size beforehand to add the offset to
934
* chunk offset entries */
935
moov_size += moovrf->mvhd_size + 8; /* mvhd + moov size + fourcc */
936
for (i = 0; i < moovrf->num_traks; i++) {
937
TrakRecovData *trak = &(moovrf->traks_rd[i]);
938
guint32 duration; /* in moov's timescale */
941
/* convert trak duration to moov's duration */
942
duration = gst_util_uint64_scale_round (trak->duration, moovrf->timescale,
945
if (duration > longest_duration)
946
longest_duration = duration;
947
trak_size = trak_recov_data_get_trak_atom_size (trak);
948
if (trak_size == 0) {
949
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_GENERIC,
950
"Failed to estimate trak atom size");
953
moov_size += trak_size;
956
/* add chunks offsets */
957
for (i = 0; i < moovrf->num_traks; i++) {
958
TrakRecovData *trak = &(moovrf->traks_rd[i]);
959
/* 16 for the mdat header */
960
gint64 offset = moov_size + ftell (outf) + 16;
961
atom_stco64_chunks_add_offset (&trak->stbl.stco64, offset);
965
GST_WRITE_UINT32_BE (auxdata, moov_size);
966
GST_WRITE_UINT32_LE (auxdata + 4, FOURCC_moov);
967
if (fwrite (auxdata, 1, 8, outf) != 8) {
968
ATOMS_RECOV_OUTPUT_WRITE_ERROR (err);
973
mvhd_data = g_malloc (moovrf->mvhd_size);
974
if (fseek (moovrf->file, moovrf->mvhd_pos, SEEK_SET) != 0)
976
if (fread (mvhd_data, 1, moovrf->mvhd_size,
977
moovrf->file) != moovrf->mvhd_size)
979
GST_WRITE_UINT32_BE (mvhd_data + 20, moovrf->timescale);
980
GST_WRITE_UINT32_BE (mvhd_data + 24, longest_duration);
981
if (fwrite (mvhd_data, 1, moovrf->mvhd_size, outf) != moovrf->mvhd_size) {
982
ATOMS_RECOV_OUTPUT_WRITE_ERROR (err);
988
/* write the traks, this is the tough part because we need to update:
990
* - sizes of atoms from stbl to trak
993
for (i = 0; i < moovrf->num_traks; i++) {
994
TrakRecovData *trak = &(moovrf->traks_rd[i]);
995
guint trak_data_size;
996
guint32 stbl_new_size;
997
guint32 minf_new_size;
998
guint32 mdia_new_size;
999
guint32 trak_new_size;
1001
guint32 duration; /* in moov's timescale */
1003
/* convert trak duration to moov's duration */
1004
duration = gst_util_uint64_scale_round (trak->duration, moovrf->timescale,
1007
stbl_children = moov_recov_get_stbl_children_data (moovrf, trak,
1008
&stbl_children_size);
1009
if (stbl_children == NULL)
1012
/* calc the new size of the atoms from stbl to trak in the atoms tree */
1013
stbl_new_size = trak->stsd_size + stbl_children_size + 8;
1014
size_diff = stbl_new_size - trak->stbl_size;
1015
minf_new_size = trak->minf_size + size_diff;
1016
mdia_new_size = trak->mdia_size + size_diff;
1017
trak_new_size = trak->trak_size + size_diff;
1019
if (fseek (moovrf->file, trak->file_offset, SEEK_SET) != 0)
1021
trak_data_size = trak->post_stsd_offset - trak->file_offset;
1022
trak_data = g_malloc (trak_data_size);
1023
if (fread (trak_data, 1, trak_data_size, moovrf->file) != trak_data_size) {
1026
/* update the size values in those read atoms before writing */
1027
GST_WRITE_UINT32_BE (trak_data, trak_new_size);
1028
GST_WRITE_UINT32_BE (trak_data + (trak->mdia_file_offset -
1029
trak->file_offset), mdia_new_size);
1030
GST_WRITE_UINT32_BE (trak_data + (trak->minf_file_offset -
1031
trak->file_offset), minf_new_size);
1032
GST_WRITE_UINT32_BE (trak_data + (trak->stbl_file_offset -
1033
trak->file_offset), stbl_new_size);
1035
/* update duration values in tkhd and mdhd */
1036
GST_WRITE_UINT32_BE (trak_data + (trak->tkhd_file_offset -
1037
trak->file_offset) + 28, duration);
1038
GST_WRITE_UINT32_BE (trak_data + (trak->mdhd_file_offset -
1039
trak->file_offset) + 24, trak->duration);
1041
if (fwrite (trak_data, 1, trak_data_size, outf) != trak_data_size) {
1042
ATOMS_RECOV_OUTPUT_WRITE_ERROR (err);
1045
if (fwrite (stbl_children, 1, stbl_children_size, outf) !=
1046
stbl_children_size) {
1047
ATOMS_RECOV_OUTPUT_WRITE_ERROR (err);
1052
g_free (stbl_children);
1053
stbl_children = NULL;
1056
/* write the mdat */
1057
/* write the header first */
1058
GST_WRITE_UINT32_BE (auxdata, 1);
1059
GST_WRITE_UINT32_LE (auxdata + 4, FOURCC_mdat);
1060
GST_WRITE_UINT64_BE (auxdata + 8, mdatrf->mdat_size);
1061
if (fwrite (auxdata, 1, 16, outf) != 16) {
1062
ATOMS_RECOV_OUTPUT_WRITE_ERROR (err);
1066
/* now read the mdat data and output to the file */
1067
if (fseek (mdatrf->file, mdatrf->mdat_start +
1068
(mdatrf->rawfile ? 0 : mdatrf->mdat_header_size), SEEK_SET) != 0)
1071
data = g_malloc (4096);
1072
while (!feof (mdatrf->file)) {
1075
read = fread (data, 1, 4096, mdatrf->file);
1076
write = fwrite (data, 1, read, outf);
1078
if (write != read) {
1079
g_set_error (err, ATOMS_RECOV_QUARK, ATOMS_RECOV_ERR_FILE,
1080
"Failed to copy data to output file: %s", g_strerror (errno));
1089
g_free (stbl_children);
1091
g_free (prefix_data);
added
removed
gst/qtmux/atomsrecovery.c
