2 #include "EbmlBufferWriter.h"
3 #include "EbmlWriter.h"
6 // #include <malloc.h> //_alloca
11 void Ebml_Write(EbmlGlobal *glob, const void *buffer_in, unsigned long len) {
12 unsigned char *src = glob->buf;
14 memcpy(src, buffer_in, len);
18 static void _Serialize(EbmlGlobal *glob, const unsigned char *p, const unsigned char *q) {
21 memcpy(&(glob->buf[glob->offset]), q, 1);
26 void Ebml_Serialize(EbmlGlobal *glob, const void *buffer_in, unsigned long len) {
29 const unsigned char *const p = (const unsigned char *)(buffer_in);
30 const unsigned char *const q = p + len;
32 _Serialize(glob, p, q);
36 void Ebml_StartSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc, unsigned long class_id) {
37 Ebml_WriteID(glob, class_id);
38 ebmlLoc->offset = glob->offset;
39 // todo this is always taking 8 bytes, this may need later optimization
40 unsigned long long unknownLen = 0x01FFFFFFFFFFFFFFLLU;
41 Ebml_Serialize(glob, (void *)&unknownLen, 8); // this is a key that says lenght unknown
44 void Ebml_EndSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc) {
45 unsigned long long size = glob->offset - ebmlLoc->offset - 8;
46 unsigned long long curOffset = glob->offset;
47 glob->offset = ebmlLoc->offset;
48 size |= 0x0100000000000000LLU;
49 Ebml_Serialize(glob, &size, 8);
50 glob->offset = curOffset;