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FrameCounter Class Reference

Adaptor class FrameCounter counts by-passing frames and should be installed close before or after decoding and displaying <short description="">. More...

#include <FrameCounter.hpp>

Inheritance diagram for FrameCounter:

Adaptor List of all members.

Public Member Functions

 FrameCounter (ESInfo *esi, Statistics *statistics)
list< Frame * > adapt (Frame *frm)
 Accepts as input a frame, and checks if it can adapt the frame, If the frame is modified, a new Frame object is created and inserted into the return list.
Adaptor * clone ()
 Create a shallow copy of the Adaptor.
void initialize ()
 Initialize internal data structures.
list< Frame * > close ()
 Close and destroy an Adaptor.
void setESInfo (ESInfo *esi)
 Sets a reference to an ESInfo object.
ESInfo * getESInfo ()
u32 getTranscodingCosts () const
 returns adaptation costs (CPU only)

Protected Attributes

ESInfo * es
Statistics * stats
u32 currentFrameNumber

Detailed Description

Adaptor class FrameCounter counts by-passing frames and should be installed close before or after decoding and displaying <short description="">.

Author:
Michael Kropfberger and Peter Schojer
Version:
Id
FrameCounter.hpp,v 1.6 2006/01/20 15:37:17 mkropfbe Exp

Definition at line 63 of file FrameCounter.hpp.

Member Function Documentation

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

Accepts as input a frame, and checks if it can adapt the frame, If the frame is modified, a new Frame object is created and inserted into the return list.

This new frame is returned only, if the size of the payload is larger than zero. If the frame was not modified, it is also inserted into the list. For more complex adaptors, it will happen, that the adaptor caches up one complete GOP and returns the full GOP in network order. A caching adaptor has to create deep-copies for each frames. Never directly modify the payload of the input frm, always create copies!!!

Parameters:
frm object to adapt. An Adaptor is never allowed to free the input frame. This has to be done in the caller.
Returns:
List of adapted Frame objects

Reimplemented from Adaptor.

Definition at line 67 of file FrameCounter.cpp.

References Frame::getAU(), ESInfo::getMediaTimeScale(), Statistics::getPlayoutSecFPS(), ESInfo::getVOPTimeIncrement(), and Statistics::incPlayoutSecFPS().

00067                                                 {
00068         list < Frame * >tmp;
00069         u32 thisCTS;
00070         int thisSec;
00071 
00072         thisCTS = frm->getAU()->cts;
00073         thisSec = (int)floor((double)thisCTS / es->getMediaTimeScale());
00074         dprintf_full("FrameCounter::adapt frame CTS %i, VOP increment %i, playoutSec: %i FPS: %i\n",
00075                                                          thisCTS, es->getVOPTimeIncrement(), thisSec, stats->getPlayoutSecFPS(thisSec) );
00076 
00077         //      if (frm->getType() != Frame::HEADER_VOP)
00078         stats->incPlayoutSecFPS(thisSec);
00079         currentFrameNumber++;
00080 
00081         //standard forwarding adaptor behaviour
00082         tmp.push_front(frm);
00083 
00084         return tmp;
00085 }

Adaptor* FrameCounter::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 74 of file FrameCounter.hpp.

00074 { return new FrameCounter(es,stats);    };

list< Frame * > FrameCounter::close (   )  [inline, 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 78 of file FrameCounter.hpp.

00078                                 {
00079                 list < Frame * >tmp;
00080                 return tmp;
00081         };

void FrameCounter::initialize (   )  [virtual]
 

Initialize internal data structures.

Implements Adaptor.

Definition at line 62 of file FrameCounter.cpp.

00062                               {
00063 }

void FrameCounter::setESInfo (  ESInfo *  esi  )  [inline, virtual]
 

Sets a reference to an ESInfo object.

Adaptors are allowed to change ESInfo objects. If you don't want that, pass an es->clone()

Reimplemented from Adaptor.

Definition at line 87 of file FrameCounter.hpp.

00087 {es=esi;};

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