bool COggFile::Read(OggPage& page, bool fFull, HANDLE hBreak)
{
memset(&page.m_hdr, 0, sizeof(page.m_hdr));
page.m_lens.RemoveAll();
page.SetCount(0);
if(!Read(page.m_hdr, hBreak))
return(false);
int pagelen = 0, packetlen = 0;
for(BYTE i = 0; i < page.m_hdr.number_page_segments; i++)
{
BYTE b;
if(S_OK != ByteRead(&b, 1)) return(false);
packetlen += b;
if(1/*b < 0xff*/) {page.m_lens.AddTail(packetlen); pagelen += packetlen; packetlen = 0;}
}
if(fFull)
{
page.SetCount(pagelen);
if(S_OK != ByteRead(page.GetData(), page.GetCount()))
return(false);
}
else
{
Seek(GetPos() + pagelen);
page.m_lens.RemoveAll();
}
return(true);
}
bool CDSMSplitterFile::Read(__int64 len, BYTE& id, CMediaType& mt)
{
id = (BYTE)BitRead(8);
ByteRead((BYTE*)&mt.majortype, sizeof(mt.majortype));
ByteRead((BYTE*)&mt.subtype, sizeof(mt.subtype));
mt.bFixedSizeSamples = (BOOL)BitRead(1);
mt.bTemporalCompression = (BOOL)BitRead(1);
mt.lSampleSize = (ULONG)BitRead(30);
ByteRead((BYTE*)&mt.formattype, sizeof(mt.formattype));
len -= 5 + sizeof(GUID)*3;
ASSERT(len >= 0);
if(len > 0) {mt.AllocFormatBuffer((LONG)len); ByteRead(mt.Format(), mt.FormatLength());}
else mt.ResetFormatBuffer();
return true;
}
bool CDSMSplitterFile::Read(__int64 len, Packet* p, bool fData)
{
if (!p) {
return false;
}
p->TrackNumber = (DWORD)BitRead(8);
p->bSyncPoint = (BOOL)BitRead(1);
bool fSign = !!BitRead(1);
int iTimeStamp = (int)BitRead(3);
int iDuration = (int)BitRead(3);
if (fSign && !iTimeStamp) {
ASSERT(!iDuration);
p->rtStart = Packet::INVALID_TIME;
p->rtStop = Packet::INVALID_TIME + 1;
} else {
p->rtStart = (REFERENCE_TIME)BitRead(iTimeStamp<<3) * (fSign ? -1 : 1);
p->rtStop = p->rtStart + BitRead(iDuration<<3);
}
if (fData) {
p->SetCount((INT_PTR)len - (2 + iTimeStamp + iDuration));
ByteRead(p->GetData(), p->GetCount());
}
return true;
}
bool CDSMSplitterFile::Read(__int64 len, CStreamInfoMap& im)
{
while (len >= 5) {
CStringA key;
ByteRead((BYTE*)key.GetBufferSetLength(4), 4);
len -= 4;
len -= Read(len, im[key]);
}
return len == 0;
}
bool CDSMSplitterFile::Read(__int64 len, IDSMResourceBagImpl& res)
{
BYTE compression = (BYTE)BitRead(2);
BYTE reserved = (BYTE)BitRead(6);
len--;
CDSMResource r;
len -= Read(len, r.name);
len -= Read(len, r.desc);
len -= Read(len, r.mime);
if(compression != 0) return false; // TODO
r.data.SetCount(len);
ByteRead(r.data.GetData(), r.data.GetCount());
res += r;
return true;
}
bool COggFile::Sync(HANDLE hBreak)
{
__int64 start = GetPos();
DWORD dw;
for(__int64 i = 0, j = hBreak ? GetLength() - start : 65536;
i < j && S_OK == ByteRead((BYTE*)&dw, sizeof(dw))
&& ((i&0xffff) || !hBreak || WaitForSingleObject(hBreak, 0) != WAIT_OBJECT_0);
i++, Seek(start + i))
{
if(dw == 'SggO')
{
Seek(start + i);
return(true);
}
}
Seek(start);
return(false);
}
bool COggFile::Read(OggPageHeader& hdr, HANDLE hBreak)
{
return Sync(hBreak) && S_OK == ByteRead((BYTE*)&hdr, sizeof(hdr)) && hdr.capture_pattern == 'SggO';
}