mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 20:54:40 +00:00
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
// #include <strmif.h>
|
|
#include "EbmlBufferWriter.h"
|
|
#include "EbmlWriter.h"
|
|
// #include <cassert>
|
|
// #include <limits>
|
|
// #include <malloc.h> //_alloca
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include <string.h>
|
|
|
|
void
|
|
Ebml_Serialize(EbmlGlobal *glob, const void *buffer_in, int buffer_size, unsigned long len)
|
|
{
|
|
/* buffer_size:
|
|
* 1 - int8_t;
|
|
* 2 - int16_t;
|
|
* 4 - int32_t;
|
|
* 8 - int64_t;
|
|
*/
|
|
long i;
|
|
for(i = len-1; i >= 0; i--) {
|
|
unsigned char x;
|
|
if (buffer_size == 1) {
|
|
x = (char)(*(const int8_t *)buffer_in >> (i * 8));
|
|
} else if (buffer_size == 2) {
|
|
x = (char)(*(const int16_t *)buffer_in >> (i * 8));
|
|
} else if (buffer_size == 4) {
|
|
x = (char)(*(const int32_t *)buffer_in >> (i * 8));
|
|
} else if (buffer_size == 8) {
|
|
x = (char)(*(const int64_t *)buffer_in >> (i * 8));
|
|
}
|
|
Ebml_Write(glob, &x, 1);
|
|
}
|
|
}
|
|
|
|
void Ebml_Write(EbmlGlobal *glob, const void *buffer_in, unsigned long len) {
|
|
unsigned char *src = glob->buf;
|
|
src += glob->offset;
|
|
memcpy(src, buffer_in, len);
|
|
glob->offset += len;
|
|
}
|
|
|
|
static void _Serialize(EbmlGlobal *glob, const unsigned char *p, const unsigned char *q) {
|
|
while (q != p) {
|
|
--q;
|
|
|
|
memcpy(&(glob->buf[glob->offset]), q, 1);
|
|
glob->offset++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
void Ebml_Serialize(EbmlGlobal *glob, const void *buffer_in, unsigned long len) {
|
|
// assert(buf);
|
|
|
|
const unsigned char *const p = (const unsigned char *)(buffer_in);
|
|
const unsigned char *const q = p + len;
|
|
|
|
_Serialize(glob, p, q);
|
|
}
|
|
*/
|
|
|
|
void Ebml_StartSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc, unsigned long class_id) {
|
|
unsigned long long unknownLen = 0x01FFFFFFFFFFFFFFLL;
|
|
Ebml_WriteID(glob, class_id);
|
|
ebmlLoc->offset = glob->offset;
|
|
// todo this is always taking 8 bytes, this may need later optimization
|
|
Ebml_Serialize(glob, (void *)&unknownLen,sizeof(unknownLen), 8); // this is a key that says length unknown
|
|
}
|
|
|
|
void Ebml_EndSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc) {
|
|
unsigned long long size = glob->offset - ebmlLoc->offset - 8;
|
|
unsigned long long curOffset = glob->offset;
|
|
glob->offset = ebmlLoc->offset;
|
|
size |= 0x0100000000000000LL;
|
|
Ebml_Serialize(glob, &size,sizeof(size), 8);
|
|
glob->offset = curOffset;
|
|
}
|
|
|