MEDIACODEC_API MediaPacket_t* ReadNextPacket(MediaFormatContext_t* ctx){
MediaPacket_t* pkt = NULL;
while(1){
pkt = AllocPacket();
if( pkt == NULL){
return NULL;
}
if( av_read_frame((AVFormatContext*)ctx->fc, (AVPacket*)pkt->pkt) <0 ){
FreePacket(pkt,0); //并没有释放内部的packet数据
//printf("read_fream error!\n");
return NULL;
}
int64_t pts;
pts = pkt->pkt->pts;
if( pts == 0){
pts = pkt->pkt->dts;
}
pts *= (ctx->video.tb_num/(ctx->video.tb_den*1.0));
//printf("elapsed time:%d, pts:%d,dts:%d\n",pts,pkt->pkt->pts,pkt->pkt->dts) ;
if( ctx->video.videostream == pkt->pkt->stream_index){
pkt->data = pkt->pkt->data;
pkt->size = pkt->pkt->size;
pkt->stream = pkt->pkt->stream_index;
pkt->duration = pts; //pkt->pkt->duration;
return pkt;
}
FreePacket(pkt,1);
}
return NULL;
}
void CLoginIscSocket::SendUserKick( char* accname )
{
CPacket* pakout = AllocPacket( );
Packet_Start( pakout, 0x06, 0x414 );
Packet_AddString( pakout, accname );
SendPacket( pakout );
};
void CLoginIscSocket::SendUserConfirmReply( char retcode, int lsid, int csid, unsigned int logintime, unsigned int right, unsigned int payflag, unsigned char chno, char* accname )
{
CPacket* pakout = AllocPacket( );
Packet_Start( pakout, 0x20, 0x411 );
Packet_SetByte( pakout, 0, retcode );
Packet_SetDword( pakout, 1, lsid );
Packet_SetDword( pakout, 5, csid );
Packet_SetDword( pakout, 13, logintime );
Packet_SetDword( pakout, 17, right );
Packet_SetDword( pakout, 21, payflag );
Packet_SetByte( pakout, 25, chno );
Packet_AddString( pakout, accname );
SendPacket( pakout );
};
OMXPacket *OMXReader::Read()
{
assert(!IsEof());
AVPacket pkt;
OMXPacket *m_omx_pkt = NULL;
int result = -1;
if(!m_pFormatContext)
return NULL;
Lock();
// assume we are not eof
if(m_pFormatContext->pb)
m_pFormatContext->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 = m_dllAvFormat.av_read_frame(m_pFormatContext, &pkt);
if (result < 0)
{
m_eof = true;
//FlushRead();
//m_dllAvCodec.av_free_packet(&pkt);
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(m_pFormatContext->pb && !m_pFormatContext->pb->eof_reached)
{
CLog::Log(LOGERROR, "OMXReader::Read no valid packet");
//FlushRead();
}
m_dllAvCodec.av_free_packet(&pkt);
m_eof = true;
UnLock();
return NULL;
}
AVStream *pStream = m_pFormatContext->streams[pkt.stream_index];
/* only read packets for active streams */
/*
if(!IsActive(pkt.stream_index))
{
m_dllAvCodec.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(pkt.dts == 0)
pkt.dts = AV_NOPTS_VALUE;
if(pkt.pts == 0)
pkt.pts = AV_NOPTS_VALUE;
if(m_bMatroska && 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(m_bMatroska && pStream->codec->codec_id == CODEC_ID_TEXT && pkt.convergence_duration != 0)
pkt.duration = pkt.convergence_duration;
if(m_bAVI && pStream->codec && pStream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
{
// AVI's always have borked pts, specially if m_pFormatContext->flags includes
// AVFMT_FLAG_GENPTS so always use dts
pkt.pts = AV_NOPTS_VALUE;
}
m_omx_pkt = AllocPacket(pkt.size);
/* oom error allocation av packet */
if(!m_omx_pkt)
{
m_eof = true;
m_dllAvCodec.av_free_packet(&pkt);
UnLock();
return NULL;
}
m_omx_pkt->codec_type = pStream->codec->codec_type;
/* copy content into our own packet */
m_omx_pkt->size = pkt.size;
if (pkt.data)
memcpy(m_omx_pkt->data, pkt.data, m_omx_pkt->size);
m_omx_pkt->stream_index = pkt.stream_index;
GetHints(pStream, &m_omx_pkt->hints);
//m_omx_pkt->dts = ConvertTimestamp(pkt.dts, pStream->time_base.den, pStream->time_base.num);
//m_omx_pkt->pts = ConvertTimestamp(pkt.pts, pStream->time_base.den, pStream->time_base.num);
m_omx_pkt->dts = ConvertTimestamp(pkt.dts, &pStream->time_base);
m_omx_pkt->pts = ConvertTimestamp(pkt.pts, &pStream->time_base);
m_omx_pkt->duration = DVD_SEC_TO_TIME((double)pkt.duration * pStream->time_base.num / pStream->time_base.den);
// used to guess streamlength
if (m_omx_pkt->dts != DVD_NOPTS_VALUE && (m_omx_pkt->dts > m_iCurrentPts || m_iCurrentPts == DVD_NOPTS_VALUE))
m_iCurrentPts = m_omx_pkt->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 = m_dllAvUtil.av_rescale_rnd(pStream->duration, (int64_t)pStream->time_base.num * AV_TIME_BASE,
pStream->time_base.den, AV_ROUND_NEAR_INF);
if ((m_pFormatContext->duration == (int64_t)AV_NOPTS_VALUE)
|| (m_pFormatContext->duration != (int64_t)AV_NOPTS_VALUE && duration > m_pFormatContext->duration))
m_pFormatContext->duration = duration;
}
}
m_dllAvCodec.av_free_packet(&pkt);
UnLock();
return m_omx_pkt;
}
