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/*
* $Id$
*
* (C) 2003-2006 Gabest
* (C) 2006-2012 see Authors.txt
*
* This file is part of MPC-HC.
*
* MPC-HC is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* MPC-HC is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "stdafx.h"
#include "OggFile.h"
COggFile::COggFile(IAsyncReader* pAsyncReader, HRESULT& hr)
: CBaseSplitterFile(pAsyncReader, hr, DEFAULT_CACHE_LENGTH, false)
{
if (FAILED(hr)) {
return;
}
hr = Init();
}
HRESULT COggFile::Init()
{
Seek(0);
if (!Sync()) {
return E_FAIL;
}
return S_OK;
}
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';
}
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;
}
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