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FrameTypeCounter Class Reference

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

#include <FrameTypeCounter.hpp>

Inheritance diagram for FrameTypeCounter:

Adaptor List of all members.

Public Member Functions

 FrameTypeCounter (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

Detailed Description

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

Author:
Ronald Sowa
Version:
Id
FrameTypeCounter.hpp,v 1.3 2006/01/20 15:37:17 mkropfbe Exp

Definition at line 63 of file FrameTypeCounter.hpp.

Member Function Documentation

list< Frame * > FrameTypeCounter::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 66 of file FrameTypeCounter.cpp.

References Frame::getAU(), ESInfo::getMediaTimeScale(), Statistics::getPlayoutSecFPS(), Frame::getType(), ESInfo::getVOPTimeIncrement(), Statistics::incPlayoutSecBFrame(), Statistics::incPlayoutSecIFrame(), and Statistics::incPlayoutSecPFrame().

00066                                                     {
00067         list < Frame * >tmp;
00068         u32 thisCTS;
00069         int thisSec;
00070 
00071         thisCTS = frm->getAU()->cts;
00072         thisSec = (int)floor((double)thisCTS / es->getMediaTimeScale());
00073         dprintf_full("FrameTypeCounter::adapt frame CTS %i, VOP increment %i, playoutSec: %i FPS: %i\n",
00074                                                          thisCTS, es->getVOPTimeIncrement(), thisSec, stats->getPlayoutSecFPS(thisSec) );
00075 
00076         //      if (frm->getType() != Frame::HEADER_VOP)
00077         if(frm->getType() == Frame::I_VOP)
00078                         stats->incPlayoutSecIFrame(thisSec);
00079         if(frm->getType() == Frame::P_VOP)
00080                         stats->incPlayoutSecPFrame(thisSec);
00081         if(frm->getType() == Frame::B_VOP)
00082                         stats->incPlayoutSecBFrame(thisSec);
00083 
00084         
00085 
00086         //standard forwarding adaptor behaviour
00087         tmp.push_front(frm);
00088         return tmp;
00089 
00090 }

Adaptor* FrameTypeCounter::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 FrameTypeCounter.hpp.

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

list< Frame * > FrameTypeCounter::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 FrameTypeCounter.hpp.

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

void FrameTypeCounter::initialize (   )  [virtual]
 

Initialize internal data structures.

Implements Adaptor.

Definition at line 61 of file FrameTypeCounter.cpp.

00061                                   {
00062 }

void FrameTypeCounter::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 FrameTypeCounter.hpp.

00087 {es=esi;};

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