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#include "stdafx.h"
#include "NutFile.h"
CNutFile::CNutFile(IAsyncReader* pAsyncReader, HRESULT& hr)
: CBaseSplitterFile(pAsyncReader, hr)
{
if(FAILED(hr)) return;
hr = Init();
}
HRESULT CNutFile::Init()
{
Seek(0);
if(BitRead(64) != NUTM)
return E_FAIL;
m_streams.RemoveAll();
Seek(0);
while(GetRemaining())
{
frame_header fh;
fh.checksum_flag = 1;
UINT64 id = 0;
if(BitRead(1, true) == 0
|| (id = BitRead(64)) == NUTK)
break;
packet_header ph;
Read(ph);
if(id == NUTM)
{
Read(m_mh);
}
else if(id == NUTS)
{
CAutoPtr<stream_header> sh(DNew stream_header());
Read(*sh);
if(sh->stream_class == SC_VIDEO) Read(sh->vsh);
else if(sh->stream_class == SC_AUDIO) Read(sh->ash);
// else if(sh->stream_class == SC_SUBTITLE) ; // nothing to do
m_streams.AddTail(sh);
}
else if(id == NUTX)
{
index_header ih;
Read(ih);
}
else if(id == NUTI)
{
info_header ih;
Read(ih);
}
else if(id == 0) // frame
{
ASSERT(0);
break;
}
if(fh.checksum_flag)
{
Seek(ph.pos + ph.fptr - 4);
ph.checksum = (UINT32)BitRead(32);
}
Seek(ph.pos + ph.fptr);
}
Seek(0);
return m_streams.GetCount() ? S_OK : E_FAIL;
}
void CNutFile::Read(vint& vi)
{
vi = 0;
bool more;
do {more = !!BitRead(1); vi = (vi << 7) | BitRead(7);}
while(more);
}
void CNutFile::Read(svint& svi)
{
vint vi;
Read(vi);
vi++;
if(vi&1) svi = -((svint)vi>>1);
else svi = ((svint)vi>>1);
}
void CNutFile::Read(binary& b)
{
vint len;
Read(len);
b.SetCount((INT_PTR)len);
for(BYTE* buff = b.GetData(); len-- > 0; *buff++ = (BYTE)BitRead(8));
}
void CNutFile::Read(packet_header& ph)
{
ph.pos = GetPos();
Read(ph.fptr);
Read(ph.bptr);
}
void CNutFile::Read(main_header& mh)
{
Read(mh.version);
Read(mh.stream_count);
}
void CNutFile::Read(stream_header& sh)
{
Read(sh.stream_id);
Read(sh.stream_class);
Read(sh.fourcc);
Read(sh.average_bitrate);
Read(sh.language_code);
Read(sh.time_base_nom);
Read(sh.time_base_denom);
Read(sh.msb_timestamp_shift);
Read(sh.shuffle_type);
sh.fixed_fps = BitRead(1);
sh.index_flag = BitRead(1);
sh.reserved = BitRead(6);
while(1)
{
CAutoPtr<codec_specific> p(DNew codec_specific());
Read(p->type);
if(p->type == 0) break;
Read(p->data);
sh.cs.AddTail(p);
}
}
void CNutFile::Read(video_stream_header& vsh)
{
Read(vsh.width);
Read(vsh.height);
Read(vsh.sample_width);
Read(vsh.sample_height);
Read(vsh.colorspace_type);
}
void CNutFile::Read(audio_stream_header& ash)
{
Read(ash.samplerate_mul);
Read(ash.channel_count);
}
void CNutFile::Read(index_header& ih)
{
Read(ih.stream_id);
vint len;
Read(len);
ih.ie.SetCount((INT_PTR)len);
for(index_entry* p = ih.ie.GetData(); len-- > 0;)
{
Read(p->timestamp);
Read(p->position);
}
}
void CNutFile::Read(info_header& ih)
{
// TODO
/*
for(;;){
id v
if(id==0) break
name= info_table[id][0]
type= info_table[id][1]
if(type==NULL)
type b
if(name==NULL)
name b
if(type=="v")
value v
else if(type=="s")
value s
else
value b
}
*/
}
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