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HxImageSeqMDC Class Reference

Read mpg files using MPEG Developing Classes (MDC) library. More...

#include <HxImageSeqMDC.h>

Inheritance diagram for HxImageSeqMDC::

HxImageSeqData HxRcObject List of all members.

Public Methods

 HxImageSeqMDC (HxString fileName, int bufSize)
 Constructor. More...

virtual ~HxImageSeqMDC ()
 Destructor. More...

virtual int valid ()
 Is this a valid object? More...

virtual int frameWidth ()
 The frame width. More...

virtual int frameHeight ()
 The frame height. More...

virtual int frameDepth ()
 The frame depth. More...

virtual int nrFrames ()
 The number of frames. More...

virtual void getRgb2d (int fn, int *pixels, HxString displayMode)
 Display the specified frame in the given buffer in ARGB format using the given displayMode. More...

virtual void getRgbPixels2d (int fn, int *pixels, HxString displayMode, int resWidth, int resHeight, HxGeoIntType gi)
 Display the specified frame in the given buffer in ARGB format using the given displayMode. More...

virtual HxImageRep frame2HxImageRep (int)
 "construct" an HxImageRep for the specified frame. More...

Detailed Description

Read mpg files using MPEG Developing Classes (MDC) library.

Constructor & Destructor Documentation

HxImageSeqMDC::HxImageSeqMDC (  HxString    fileName,
int    bufSize
) 
 

Constructor. 

00019     : HxImageSeqData(bufSize)
00020 {
00021     long lResult = _mpvDecoder.Initialize(fileName.c_str());
00022     if (lResult == MDC_SUCCESS) {
00023         if (_mpvDecoder.InitializeGenDisplayBuffer() <= 0) {
00024             _valid = 0;
00025         } else {
00026             _mpvDecoder.SetSpeed(0);
00027             _mpvDecoder.PrepareRandomAccess();
00028             _mpvDecoder.JumpToEndingPicture();
00029             if (_mpvDecoder.GetCurFrameNum(&lResult) == MDC_SUCCESS)
00030                 _nrFrames = lResult;
00031             else
00032                 _nrFrames = 0;
00033             WORD width = _mpvDecoder.FrameWidth();
00034             WORD height = _mpvDecoder.FrameHeight();
00035             _sizes = HxSizes(width, height, 1);
00036             _pnOutBuf = new BYTE [width*height*3];
00037             _valid = 1;
00038         }
00039     } else {
00040         _valid = 0;
00041     }
00042     if (! _valid) {
00043         HxEnvironment::instance()->errorStream() <<
00044             "HxImageSeqMDC : unable to load file " << fileName << STD_ENDL;
00045         HxEnvironment::instance()->flush();
00046     }
00047 }

HxImageSeqMDC::~HxImageSeqMDC (    )  [virtual]
 

Destructor. 

00056 {
00057     if (_valid) {
00058         _mpvDecoder.DeleteGenDisplayBuffer();
00059         _valid = false;
00060     }
00061 }

Member Function Documentation

int HxImageSeqMDC::valid (    )  [virtual]
 

Is this a valid object?

Reimplemented from HxImageSeqData. 

00051 {
00052     return _valid;
00053 }

int HxImageSeqMDC::frameWidth (    )  [virtual]
 

The frame width.

Reimplemented from HxImageSeqData. 

00065 {
00066     return (_valid) ? _sizes.x() : -1;
00067 }

int HxImageSeqMDC::frameHeight (    )  [virtual]
 

The frame height.

Reimplemented from HxImageSeqData. 

00071 {
00072     return (_valid) ? _sizes.y() : -1;
00073 }

int HxImageSeqMDC::frameDepth (    )  [virtual]
 

The frame depth.

Reimplemented from HxImageSeqData. 

00077 {
00078     return 1;
00079 }

int HxImageSeqMDC::nrFrames (    )  [virtual]
 

The number of frames.

Reimplemented from HxImageSeqData. 

00083 {
00084     return _nrFrames;
00085 }

void HxImageSeqMDC::getRgb2d (  int    fn,
int *    pixels,
HxString    displayMode
)  [virtual]
 

Display the specified frame in the given buffer in ARGB format using the given displayMode.

Optimized version : does not require HxImageRep.

Reimplemented from HxImageSeqData. 

00102 {
00103     if(!_valid) return;
00104 
00105     if(displayMode == "Direct") getRgbPixels2d(fn, pixels);
00106     else
00107         HxImageSeqData::getRgb2d(fn, pixels, displayMode);
00108 }

void HxImageSeqMDC::getRgbPixels2d (  int    fn,
int *    pixels,
HxString    displayMode,
int    resWidth,
int    resHeight,
HxGeoIntType    gi
)  [virtual]
 

Display the specified frame in the given buffer in ARGB format using the given displayMode.

Optimized version : does not require HxImageRep.

Reimplemented from HxImageSeqData. 

00090 {
00091     if(!_valid) return;
00092 
00093     if((displayMode == "Direct") && (resWidth == -1) && (resHeight == -1))  
00094         getRgbPixels2d(fn, pixels);
00095     else
00096         HxImageSeqData::getRgbPixels2d(fn, pixels, displayMode, 
00097             resWidth, resHeight, gi);
00098 }

HxImageRep HxImageSeqMDC::frame2HxImageRep (  int    fn )  [virtual]
 

"construct" an HxImageRep for the specified frame.

Reimplemented from HxImageSeqData. 

00136 {
00137     HxImageSignature sig(2, 3, INT_VALUE, 8);
00138     //unsigned char* data = HxDXGetFrame(_handle, fn);
00139     WORD OutPicWidth, OutPicHeight;
00140     long lItemNum = _mpvDecoder.GetBufferedFrame(_pnOutBuf, &OutPicWidth,
00141                                                  &OutPicHeight, PPM, fn);
00142     if (lItemNum > 0) {
00143         //HxTagList tags;
00144         //HxAddTag(tags, "dataPtr", data);
00145         //return HxImageFactory::instance().fromImport(sig, _sizes, 
00146         //  "importBgr", tags);
00147 
00148         HxImageRep im = HxMakeFromByteData(3, 2, _sizes, _pnOutBuf);
00149         return im;
00150     }
00151     HxImageRep im2 = HxMakeFromSignature(sig, _sizes);
00152     return im2;
00153 }

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