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put_ebml_void()

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Originally committed as revision 10311 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2007-09-05 00:23:09 +00:00
parent ab41602755
commit f57b85a569
1 changed files with 18 additions and 0 deletions
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18
libavformat/matroskaenc.c
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@ -90,6 +90,24 @@ static void put_ebml_string(ByteIOContext *pb, unsigned int elementid, const cha
put_ebml_binary(pb, elementid, str, strlen(str));
}
// this reserves exactly the amount of space specified by size, which must be at least 2
static void put_ebml_void(ByteIOContext *pb, uint64_t size)
{
offset_t currentpos = url_ftell(pb);
if (size < 2)
return;
put_ebml_id(pb, EBML_ID_VOID);
// we need to subtract the length needed to store the size from the size we need to reserve
// so 2 cases, we use 8 bytes to store the size if possible, 1 byte otherwise
if (size < 10)
put_ebml_size(pb, size-1, 0);
else
put_ebml_size(pb, size-9, 7);
url_fseek(pb, currentpos + size, SEEK_SET);
}
static offset_t start_ebml_master(ByteIOContext *pb, unsigned int elementid)
{
put_ebml_id(pb, elementid);