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12 Feb 2007

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FrameRotate Class Reference

Implementation of Adaptor that 90degree rotates every incoming frame. More...

#include <FrameRotate.hpp>

Inheritance diagram for FrameRotate:

List of all members.

Public Member Functions
	FrameRotate (VideoESInfo *pESInfo, u32 degrees)
	Constructor.
list< Frame * >	adapt (Frame *frm)
	Frame frm in - list of Frame objects out.
virtual void	setESInfo (ESInfo *esi)
	Sets a reference to an ESInfo object.
virtual ESInfo *	getESInfo ()
Adaptor *	clone ()
	Not implemented.
void	initialize ()
	Initialize internal data structures.
u32	getTranscodingCosts () const
	returns adaptation costs (CPU only) rotating is expensive

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Detailed Description

Implementation of Adaptor that 90degree rotates every incoming frame.

Author:

Michael Kropfberger

Version:

Id

FrameRotate.hpp,v 1.3 2005/06/19 14:47:41 mkropfbe Exp

Definition at line 60 of file FrameRotate.hpp.

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Constructor & Destructor Documentation

FrameRotate::FrameRotate (  VideoESInfo *  pESInfo, u32  degrees )

Constructor. Takes input frame size from pESInfo, and 90degree rotates every incoming frame, after that, the pESInfo is set to the new size (x,y toggled) Parameters: pESInfo  Pointer to ESInfo object, containing valid size information about the input Frame objects. rotation works for all RGB and YUV formats! degrees:  is a number out of 90,180, 270 Definition at line 61 of file FrameRotate.cpp. Referenced by clone(). { es = pESInfo; strcpy(name,"FrameRotate"); initialized = false; this->degrees = degrees; switch (degrees) { case 90: case 270: muiTargetWidth = es->getHeight(); muiTargetHeight = es->getWidth(); break; case 180: //mirror case 360: //ignore and bypass muiTargetWidth = es->getWidth(); muiTargetHeight = es->getHeight(); break; default: dprintf_full("FrameRotate: rotating %i degrees is not supported!\n",degrees); ::exit(1); break; } // initialize(); }

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Member Function Documentation

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

Frame frm in - list of Frame objects out. Output list will contain one Frame object only. If the incoming frm has already the correct size, no scaling is done Parameters: frm  Pointer to uncompressed Frame object Returns: List of Frame objects Reimplemented from Adaptor. Definition at line 112 of file FrameRotate.cpp. References Frame::getAU(), UncompressedVideoFrame::getColorSpace(), VideoFrame::getHeight(), VideoFrame::getWidth(), initialize(), and UncompressedVideoFrame::mapColorSpaceToBitDepth(). { list < Frame * >retFrameList; UncompressedVideoFrame* ufrm = (UncompressedVideoFrame*)frm; dprintf_full("FrameRotate::adapt frame %ix%i\n",(u32)ufrm->getWidth(),(u32)ufrm->getHeight() ); if ( !initialized || ((u32)ufrm->getWidth() != muiWidth) || ((u32)ufrm->getHeight() != muiHeight) ) { //resolution has changed because of stream switching initialize(); } //to be save on switching, always set ES dimensions es->setWidth(muiTargetWidth); es->setHeight(muiTargetHeight); dprintf_full("FrameRotate::adapt %ix%i --> %ix%i rotate %i degrees\n", muiWidth,muiHeight,muiTargetWidth,muiTargetHeight,degrees); if ( degrees == 360 ) { retFrameList.push_back(frm); //same size, so leave untouched return retFrameList; } register u8 *origFrame = frm->getAU()->payload; register u8 *retFrame = new u8[frm->getAU()->size]; register int w = ufrm->getWidth(); register int h = ufrm->getHeight(); register int w2 = muiTargetWidth; register int h2 = muiTargetHeight; register int x=0,y=0; register u8 *p = retFrame; register u8 bpp = UncompressedVideoFrame::mapColorSpaceToBitDepth(ufrm->getColorSpace())/8; register u32 value; register u32 pitch = w*bpp; register u32 pitch2 = w2*bpp; // memset(retFrame,0,frm->getAU()->size); // assert(ufrm->getAU()->size == w * h * bpp); switch (degrees) { case 90: // 90 degrees //////////////////////////////////////////// for (x=0; x < w; x++) { for (y=h-1; y >= 0; y--) { value = *(u32*)((u8*)(origFrame)+y*pitch + x*bpp); switch (ufrm->getColorSpace()) { case UncompressedVideoFrame::ColorSpaceGRAY8: //1 byte *(u8*)p = value; break; case UncompressedVideoFrame::ColorSpaceRGB565: //2 byte //assume little endian p[0] = value & 0xff; p[1] = (value >> 8) & 0xff; break; case UncompressedVideoFrame::ColorSpaceRGB24: //3 byte //assume little endian p[0] = value & 0xff; p[1] = (value >> 8) & 0xff; p[2] = (value >> 16) & 0xff; break; case UncompressedVideoFrame::ColorSpaceRGB32: //4 byte *(u32*)p = value; break; case UncompressedVideoFrame::ColorSpaceYV12: case UncompressedVideoFrame::ColorSpaceI420: *(u8*)p = value; // Y component break; default: dprintf_err("FrameRotate::adapt: invalid color space: %d\n", ufrm->getColorSpace()); ::exit(1); } p++; } } //for YUV, write U and V component if ( (ufrm->getColorSpace() == UncompressedVideoFrame::ColorSpaceYV12) || (ufrm->getColorSpace() == UncompressedVideoFrame::ColorSpaceI420) ) { u8 *ofrm = origFrame; u8 *rfrm = retFrame; ofrm += pitch*h; rfrm += pitch2*h2; p = rfrm; pitch /= 2; pitch2 /= 2; for (int i=0; i<2; i++) { // U or V component for (x=0; x < w/2; x++) { for (y=(h/2)-1; y >= 0; y--) { value = *(u32*)((u8*)(ofrm)+y*pitch + x); *(u8*)p++ = value; } } ofrm += (pitch*h)/2; rfrm += (pitch2*h2)/2; } } break; case 180: // 180 degrees //////////////////////////////////////////// case 270: // 270 degrees //////////////////////////////////////////// // case 360: //catched above! default: dprintf_err("Sorry, rotating by %i degrees not (yet) supported....\n",degrees); ::exit(1); break; } frm->getAU()->payload = retFrame; frm->getAU()->size = frm->getAU()->size; retFrameList.push_back(frm); delete origFrame; // not needed any more return retFrameList; }

Adaptor * FrameRotate::clone (   )  [virtual]

Not implemented. Returns: Defaults to NULL. Implements Adaptor. Definition at line 233 of file FrameRotate.cpp. References FrameRotate(). { return new FrameRotate(es, degrees); }

void FrameRotate::initialize (   )  [virtual]

Initialize internal data structures. Implements Adaptor. Definition at line 90 of file FrameRotate.cpp. Referenced by adapt(). { muiWidth = es->getWidth(); muiHeight = es->getHeight(); es->setWidth(muiTargetWidth); es->setHeight(muiTargetHeight); initialized = true; dprintf_full("FrameRotate::initialize %ix%i --> %ix%i rotate %i degrees\n", muiWidth, muiHeight, muiTargetWidth, muiTargetHeight, degrees); }

void FrameRotate::setESInfo (  ESInfo *  esi  )  [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(). NEVER delete this es in the destructor of your Adaptor! Reimplemented from Adaptor. Definition at line 47 of file FrameRotate.cpp. { es = (VideoESInfo*)esi; // FIXME??? // initialized=false; }

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

• FrameRotate.hpp
• FrameRotate.cpp

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