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TemporalAdaptor Class Reference

drops all bypassing B-frames <short description=""> More...

#include <TemporalAdaptor.hpp>

Inheritance diagram for TemporalAdaptor:

VideoAdaptor Adaptor List of all members.

Public Member Functions

 TemporalAdaptor (VideoESInfo *esi)
 Temporaladaptor updates.
list< Frame * > adapt (Frame *frm)
 accepts as input a frame, and directly modifies this frame.
Adaptor * clone ()
 Create a shallow copy of the Adaptor.
list< Frame * > close ()
 Close and destroy an Adaptor.
void initialize ()
 Initialize internal data structures.
u32 getTranscodingCosts () const
 returns adaptation costs (CPU only)

Protected Member Functions

bool doAdapt (Frame *&frm)

Protected Attributes

u32 inFrames
u32 outFrames
u32 lastDTS
u32 origVopTimeIncr

Detailed Description

drops all bypassing B-frames <short description="">

Author:
Michael Kropfberger and Peter Schojer
Version:
Id
TemporalAdaptor.hpp,v 1.7 2005/01/19 13:41:41 mkropfbe Exp

Definition at line 62 of file TemporalAdaptor.hpp.

Constructor & Destructor Documentation

TemporalAdaptor::TemporalAdaptor (  VideoESInfo *  esi  ) 
 

Temporaladaptor updates.

Parameters:
esi to reflect the change in the framerate
Definition at line 51 of file TemporalAdaptor.cpp.

Referenced by clone().

00051                                                   {
00052         es = esi;
00053         inFrames = 0;
00054         outFrames = 0;
00055         lastDTS = 0;
00056         initialized = false;
00057         strcpy(name,"TemporalAdaptor");
00058 };

Member Function Documentation

list< Frame * > TemporalAdaptor::adapt (  Frame *  frm  )  [virtual]
 

accepts as input a frame, and directly modifies this frame.

After adaptation the payload of the frame might be null

Reimplemented from Adaptor.

Definition at line 87 of file TemporalAdaptor.cpp.

References initialize().

00088 {
00089         // a temporaladaptor is not allowed to delete the input frame
00090         // because other DataSinks might need it as input
00091         if(!initialized)
00092                 initialize();
00093         inFrames++;
00094         list < Frame * >tmp;
00095         if (!doAdapt(frm)) {
00096                 tmp.push_front(frm);
00097                 outFrames++;
00098         }
00099 
00100         return tmp;
00101 };

Adaptor* TemporalAdaptor::clone (   )  [inline, virtual]
 

Create a shallow copy of the Adaptor.

Creates an Adaptor with the same setup (without copying the current status).

Returns:
An Adaptor object.

Implements Adaptor.

Definition at line 71 of file TemporalAdaptor.hpp.

References TemporalAdaptor().

00071                          {
00072                 return new TemporalAdaptor(es);
00073         };

list< Frame * > TemporalAdaptor::close (   )  [virtual]
 

Close and destroy an Adaptor.

Releases all internally buffered frame objects, and deallocate all allocated memory. The Adaptor must not be used after calling the close method!!!

Returns:
List of adapted Frame objects.

Reimplemented from Adaptor.

Definition at line 103 of file TemporalAdaptor.cpp.

00104 {
00105         list < Frame * >tmp;
00106 
00107         // set the fps
00108         // make sure it's a multiple of origVopTimeIncr
00109         if (es) {
00110                 origVopTimeIncr=es->getVOPTimeIncrement();
00111                 u32 vInc=es->getDuration()/this->outFrames;
00112                 u32 t=vInc%origVopTimeIncr;
00113                 vInc-=t;
00114                 es->setVOPTimeIncrement(vInc);
00115                 u64 fs=es->getCurrentDemuxedMediaSize();
00116                 fs*=8000;
00117                 fs/=es->getDurationInMs();
00118                 es->setAvgBandwidth((u32)fs);
00119         }
00120         // correct the bitfield, which now shows a too small complete status
00121         if(es && es->getFrameStatistic()) {
00122                 BitField* b=new BitField(es->getFrameStatistic()->getSize(),true);
00123                 es->setFrameStatistic(b);
00124         }
00125         return tmp;
00126 };

void TemporalAdaptor::initialize (   )  [virtual]
 

Initialize internal data structures.

Implements Adaptor.

Definition at line 68 of file TemporalAdaptor.cpp.

Referenced by adapt().

00069 {
00070         if(initialized)
00071                 return;
00072         initialized = true;
00073         if(es) {
00074                 u32 oldBW=es->getAvgBandwidth();
00075                 float bFrame=es->getAvgBFrameSize();            
00076                 u32 newBW=(u32)(oldBW*bFrame);
00077                 dprintf_full("TemporalAdaptor::initialize BW %u -%f-> %u\n",oldBW,bFrame,newBW);
00078                 es->setAvgBFrameSize(0.0);
00079                 es->setNum_B_frames(0);
00080                 es->setAvgBandwidth(newBW);
00081         }
00082 }

The documentation for this class was generated from the following files: