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CuttingAdaptor Class Reference

Adaptor class CuttingAdaptor only bypasses frames, that lie within the given time range of seconds, but starting with the first I-frame! <short description="">. More...

#include <CuttingAdaptor.hpp>

Inheritance diagram for CuttingAdaptor:

Adaptor List of all members.

Public Member Functions

 CuttingAdaptor (ESInfo *esi, double startSec, double endSec)
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
u32 startTS
u32 endTS
double startSec
double endSec
bool IVOPseen

Detailed Description

Adaptor class CuttingAdaptor only bypasses frames, that lie within the given time range of seconds, but starting with the first I-frame! <short description="">.

Author:
Michael Kropfberger and Peter Schojer
Version:
Id
CuttingAdaptor.hpp,v 1.3 2006/01/20 15:37:17 mkropfbe Exp

Definition at line 63 of file CuttingAdaptor.hpp.

Member Function Documentation

list< Frame * > CuttingAdaptor::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 68 of file CuttingAdaptor.cpp.

References Frame::getAU(), ESInfo::getMediaTimeScale(), Frame::getType(), ESInfo::getVOPTimeIncrement(), ESInfo::isAudioStream(), and ESInfo::isVisualStream().

00068                                                   {
00069         list < Frame * >tmp;
00070         u32 thisCTS;
00071         int thisSec;
00072 
00073         thisCTS = frm->getAU()->cts;
00074         thisSec = (int)floor((double)thisCTS / es->getMediaTimeScale());
00075         dprintf_full("CuttingAdaptor::adapt frame CTS %i, VOP increment %i, playoutSec: %i\n",
00076                                                          thisCTS, es->getVOPTimeIncrement(), thisSec );
00077 
00078         if ( (thisCTS >= startTS) && (thisCTS <= endTS) ) { //in range, so keep frame!
00079                 if (!IVOPseen) {//search for first I-frame
00080                         if ( ((es->isVisualStream() &&  (frm->getType() == Frame::I_VOP))) ||
00081                                          es->isAudioStream() ||
00082                                          (frm->getType() == Frame::UNKNOWN_VOP) ) 
00083                                 IVOPseen=true;
00084                 }
00085                 //standard forwarding adaptor behaviour
00086                 if (IVOPseen)
00087                         tmp.push_front(frm);
00088         }
00089 
00090         return tmp;
00091 }

Adaptor* CuttingAdaptor::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 CuttingAdaptor.hpp.

00074 { return new CuttingAdaptor(es, startSec, endSec);      };

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

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

void CuttingAdaptor::initialize (   )  [virtual]
 

Initialize internal data structures.

Implements Adaptor.

Definition at line 63 of file CuttingAdaptor.cpp.

00063                                 {
00064 }

void CuttingAdaptor::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 CuttingAdaptor.hpp.

00087 {es=esi;};

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