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/*
* Copyright (C) 2005-2013 Team XBMC
* http://xbmc.org
*
* This Program 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 2, or (at your option)
* any later version.
*
* This Program 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 XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#if (defined HAVE_CONFIG_H) && (!defined TARGET_WINDOWS)
#include "config.h"
#endif
#include "DVDDemuxUtils.h"
#include "DVDClock.h"
#include "utils/log.h"
extern "C" {
#include "libavcodec/avcodec.h"
}
void CDVDDemuxUtils::FreeDemuxPacket(DemuxPacket* pPacket)
{
if (pPacket)
{
try {
if (pPacket->pData) _aligned_free(pPacket->pData);
delete pPacket;
}
catch(...) {
CLog::Log(LOGERROR, "%s - Exception thrown while freeing packet", __FUNCTION__);
}
}
}
DemuxPacket* CDVDDemuxUtils::AllocateDemuxPacket(int iDataSize)
{
DemuxPacket* pPacket = new DemuxPacket;
if (!pPacket) return NULL;
try
{
memset(pPacket, 0, sizeof(DemuxPacket));
if (iDataSize > 0)
{
// need to allocate a few bytes more.
// From avcodec.h (ffmpeg)
/**
* Required number of additionally allocated bytes at the end of the input bitstream for decoding.
* this is mainly needed because some optimized bitstream readers read
* 32 or 64 bit at once and could read over the end<br>
* Note, if the first 23 bits of the additional bytes are not 0 then damaged
* MPEG bitstreams could cause overread and segfault
*/
pPacket->pData =(uint8_t*)_aligned_malloc(iDataSize + FF_INPUT_BUFFER_PADDING_SIZE, 16);
if (!pPacket->pData)
{
FreeDemuxPacket(pPacket);
return NULL;
}
// reset the last 8 bytes to 0;
memset(pPacket->pData + iDataSize, 0, FF_INPUT_BUFFER_PADDING_SIZE);
}
// setup defaults
pPacket->dts = DVD_NOPTS_VALUE;
pPacket->pts = DVD_NOPTS_VALUE;
pPacket->iStreamId = -1;
}
catch(...)
{
CLog::Log(LOGERROR, "%s - Exception thrown", __FUNCTION__);
FreeDemuxPacket(pPacket);
pPacket = NULL;
}
return pPacket;
}
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