forked from duiniuluantanqin/mp4
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mdat.c
64 lines (51 loc) · 1.53 KB
/
mdat.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
#include "quicktime.h"
#include "funcprotos.h"
int quicktime_mdat_init(quicktime_mdat_t *mdat)
{
mdat->size = 8;
mdat->start = 0;
return 0;
}
int quicktime_mdat_delete(quicktime_mdat_t *mdat)
{
return 0;
}
int quicktime_read_mdat(quicktime_t *file, quicktime_mdat_t *mdat, quicktime_atom_t *parent_atom)
{
mdat->size = parent_atom->size;
mdat->start = parent_atom->start;
quicktime_atom_skip(file, parent_atom);
return 0;
}
int quicktime_write_mdat(quicktime_t *file, quicktime_mdat_t *mdat)
{
long size = 0, new_size = 0;
int i, j;
for(i = 0; i < file->total_atracks; i++)
{
new_size = quicktime_track_end(file->atracks[i].track);
if(new_size > size)
size = new_size;
for(j = 0; j < file->atracks[i].totalHintTracks; j++) {
new_size = quicktime_track_end(file->atracks[i].hintTracks[j]);
if(new_size > size)
size = new_size;
}
}
for(i = 0; i < file->total_vtracks; i++)
{
new_size = quicktime_track_end(file->vtracks[i].track);
if(new_size > size)
size = new_size;
for(j = 0; j < file->vtracks[i].totalHintTracks; j++) {
new_size = quicktime_track_end(file->vtracks[i].hintTracks[j]);
if(new_size > size)
size = new_size;
}
}
mdat->size = size;
quicktime_set_position(file, mdat->start);
quicktime_write_int32(file, mdat->size);
quicktime_set_position(file, mdat->start + mdat->size);
return 0;
}