bool UdpConnection::initTwoWay(const std::string &remoteIp, uint16_t remotePort,
uint16_t localPort,
uint32_t packetSize) {
if (hasInitialized) {
freeResources();
}
bool worked = true;
worked &= initSdlNet();
worked &= openPort(localPort);
worked &= setUpPort(remoteIp, remotePort);
worked &= allocPacket(packetSize);
hasInitialized = worked;
return worked;
}
OMXPacket* OMXReader::Read()
{
AVPacket pkt;
OMXPacket* omxPacket = NULL;
int result = -1;
if(!avFormatContext)
return NULL;
lock();
// assume we are not eof
if(avFormatContext->pb)
avFormatContext->pb->eof_reached = 0;
// keep track if ffmpeg doesn't always set these
pkt.size = 0;
pkt.data = NULL;
pkt.stream_index = MAX_OMX_STREAMS;
result = av_read_frame(avFormatContext, &pkt);
if (result < 0)
{
isEOF = true;
unlock();
return NULL;
}
else if (pkt.size < 0 || pkt.stream_index >= MAX_OMX_STREAMS)
{
// XXX, in some cases ffmpeg returns a negative packet size
if(avFormatContext->pb && !avFormatContext->pb->eof_reached)
{
ofLog(OF_LOG_ERROR, "OMXReader::Read no valid packet");
//FlushRead();
}
av_free_packet(&pkt);
isEOF = true;
unlock();
return NULL;
}
AVStream *pStream = avFormatContext->streams[pkt.stream_index];
/* only read packets for active streams */
/*
if(!isActive(pkt.stream_index))
{
av_free_packet(&pkt);
unlock();
return NULL;
}
*/
// lavf sometimes bugs out and gives 0 dts/pts instead of no dts/pts
// since this could only happens on initial frame under normal
// circomstances, let's assume it is wrong all the time
#if 0
if(pkt.dts == 0)
pkt.dts = AV_NOPTS_VALUE;
if(pkt.pts == 0)
pkt.pts = AV_NOPTS_VALUE;
#endif
if(isMatroska && pStream->codec && pStream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
{ // matroska can store different timestamps
// for different formats, for native stored
// stuff it is pts, but for ms compatibility
// tracks, it is really dts. sadly ffmpeg
// sets these two timestamps equal all the
// time, so we select it here instead
if(pStream->codec->codec_tag == 0)
pkt.dts = AV_NOPTS_VALUE;
else
pkt.pts = AV_NOPTS_VALUE;
}
// we need to get duration slightly different for matroska embedded text subtitels
if(isMatroska && pStream->codec->codec_id == AV_CODEC_ID_SUBRIP && pkt.convergence_duration != 0)
pkt.duration = pkt.convergence_duration;
if(isAVI && pStream->codec && pStream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
{
// AVI's always have borked pts, specially if avFormatContext->flags includes
// AVFMT_FLAG_GENPTS so always use dts
pkt.pts = AV_NOPTS_VALUE;
}
omxPacket = allocPacket(pkt.size);
/* oom error allocation av packet */
if(!omxPacket)
{
isEOF = true;
av_free_packet(&pkt);
unlock();
return NULL;
}
omxPacket->codec_type = pStream->codec->codec_type;
/* copy content into our own packet */
omxPacket->size = pkt.size;
if (pkt.data)
memcpy(omxPacket->data, pkt.data, omxPacket->size);
omxPacket->stream_index = pkt.stream_index;
getHints(pStream, &omxPacket->hints);
omxPacket->dts = ConvertTimestamp(pkt.dts, pStream->time_base.den, pStream->time_base.num);
omxPacket->pts = ConvertTimestamp(pkt.pts, pStream->time_base.den, pStream->time_base.num);
omxPacket->duration = DVD_SEC_TO_TIME((double)pkt.duration * pStream->time_base.num / pStream->time_base.den);
// used to guess streamlength
if (omxPacket->dts != DVD_NOPTS_VALUE && (omxPacket->dts > currentPTS || currentPTS == DVD_NOPTS_VALUE))
currentPTS = omxPacket->dts;
// check if stream has passed full duration, needed for live streams
if(pkt.dts != (int64_t)AV_NOPTS_VALUE)
{
int64_t duration;
duration = pkt.dts;
if(pStream->start_time != (int64_t)AV_NOPTS_VALUE)
duration -= pStream->start_time;
if(duration > pStream->duration)
{
pStream->duration = duration;
duration = av_rescale_rnd(pStream->duration, (int64_t)pStream->time_base.num * AV_TIME_BASE,
pStream->time_base.den, AV_ROUND_NEAR_INF);
if ((avFormatContext->duration == (int64_t)AV_NOPTS_VALUE)
|| (avFormatContext->duration != (int64_t)AV_NOPTS_VALUE && duration > avFormatContext->duration))
avFormatContext->duration = duration;
}
}
av_free_packet(&pkt);
unlock();
return omxPacket;
}
