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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "VideoDemuxerThread.h"
#include "../base/TimeSource.h"
using namespace std;
namespace avg {
VideoDemuxerThread::VideoDemuxerThread(CQueue& cmdQ, AVFormatContext* pFormatContext,
const map<int, VideoMsgQueuePtr>& packetQs)
: WorkerThread<VideoDemuxerThread>("VideoDemuxer", cmdQ),
m_PacketQs(packetQs),
m_bEOF(false),
m_pFormatContext(pFormatContext),
m_pDemuxer()
{
map<int, VideoMsgQueuePtr>::iterator it;
for (it = m_PacketQs.begin(); it != m_PacketQs.end(); it++) {
int streamIndex = it->first;
m_PacketQEOFMap[streamIndex] = false;
}
}
VideoDemuxerThread::~VideoDemuxerThread()
{
}
bool VideoDemuxerThread::init()
{
map<int, VideoMsgQueuePtr>::iterator it;
vector<int> streamIndexes;
for (it = m_PacketQs.begin(); it != m_PacketQs.end(); it++) {
streamIndexes.push_back(it->first);
}
m_pDemuxer = FFMpegDemuxerPtr(new FFMpegDemuxer(m_pFormatContext, streamIndexes));
return true;
}
bool VideoDemuxerThread::work()
{
if (m_bEOF) {
waitForCommand();
} else {
map<int, VideoMsgQueuePtr>::iterator it;
int shortestQ = -1;
int shortestLength = INT_MAX;
for (it = m_PacketQs.begin(); it != m_PacketQs.end(); it++) {
if (it->second->size() < shortestLength &&
it->second->size() < it->second->getMaxSize() &&
!m_PacketQEOFMap[it->first])
{
shortestLength = it->second->size();
shortestQ = it->first;
}
}
if (shortestQ < 0) {
// All queues are at their max capacity. Take a nap and try again later.
// Note that we can't wait on the queue. If decoding is paused, the queues can
// remain full indefinitely and commands from the application (seek() and
// close() must still be processed.
msleep(10);
return true;
}
AVPacket * pPacket = m_pDemuxer->getPacket(shortestQ);
VideoMsgPtr pMsg(new VideoMsg);
if (pPacket == 0) {
onStreamEOF(shortestQ);
pMsg->setEOF();
} else {
pMsg->setPacket(pPacket);
}
m_PacketQs[shortestQ]->push(pMsg);
msleep(0);
}
return true;
}
void VideoDemuxerThread::seek(int seqNum, float destTime)
{
map<int, VideoMsgQueuePtr>::iterator it;
m_pDemuxer->seek(destTime);
for (it = m_PacketQs.begin(); it != m_PacketQs.end(); it++) {
VideoMsgQueuePtr pPacketQ = it->second;
clearQueue(pPacketQ);
// send SEEK_DONE
VideoMsgPtr pMsg(new VideoMsg);
pMsg->setSeekDone(seqNum, destTime);
pPacketQ->push(pMsg);
m_PacketQEOFMap[it->first] = false;
}
m_bEOF = false;
}
void VideoDemuxerThread::close()
{
map<int, VideoMsgQueuePtr>::iterator it;
for (it = m_PacketQs.begin(); it != m_PacketQs.end(); it++) {
VideoMsgQueuePtr pPacketQ = it->second;
clearQueue(pPacketQ);
VideoMsgPtr pMsg(new VideoMsg);
pMsg->setClosed();
pPacketQ->push(pMsg);
m_PacketQEOFMap[it->first] = false;
}
stop();
}
void VideoDemuxerThread::onStreamEOF(int streamIndex)
{
m_PacketQEOFMap[streamIndex] = true;
m_bEOF = true;
map<int, bool>::iterator it;
for (it = m_PacketQEOFMap.begin(); it != m_PacketQEOFMap.end(); it++) {
if (!it->second) {
m_bEOF = false;
break;
}
}
}
void VideoDemuxerThread::clearQueue(VideoMsgQueuePtr pPacketQ)
{
VideoMsgPtr pMsg;
do {
pMsg = pPacketQ->pop(false);
if (pMsg) {
pMsg->freePacket();
}
} while (pMsg);
}
}
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