---

Flags for XVID_ENC_FRAME.motion
[Encoder related functions and structures.]

Defines
#define	PMV_ADVANCEDDIAMOND8   0x00004000
	Uses advanced diamonds for 8x8 blocks.
#define	PMV_ADVANCEDDIAMOND16   0x00008000
	Uses advanced diamonds for 16x16 blocks.
#define	PMV_HALFPELDIAMOND16   0x00010000
	Turns on halfpel precision for 16x16 blocks.
#define	PMV_HALFPELREFINE16   0x00020000
	Turns on halfpel refinement step.
#define	PMV_EXTSEARCH16   0x00040000
	Extends search for 16x16 blocks.
#define	PMV_EARLYSTOP16   0x00080000
	Dynamic ME thresholding.
#define	PMV_QUICKSTOP16   0x00100000
	Dynamic ME thresholding.
#define	PMV_UNRESTRICTED16   0x00200000
	Not implemented.
#define	PMV_OVERLAPPING16   0x00400000
	Not implemented.
#define	PMV_USESQUARES16   0x00800000
	Use square pattern.
#define	PMV_HALFPELDIAMOND8   0x01000000
	see 16x16 equivalent
#define	PMV_HALFPELREFINE8   0x02000000
	see 16x16 equivalent
#define	PMV_EXTSEARCH8   0x04000000
	see 16x16 equivalent
#define	PMV_EARLYSTOP8   0x08000000
	see 16x16 equivalent
#define	PMV_QUICKSTOP8   0x10000000
	see 16x16 equivalent
#define	PMV_UNRESTRICTED8   0x20000000
	see 16x16 equivalent
#define	PMV_OVERLAPPING8   0x40000000
	see 16x16 equivalent
#define	PMV_USESQUARES8   0x80000000
	see 16x16 equivalent

---

Define Documentation

#define PMV_ADVANCEDDIAMOND8   0x00004000

Uses advanced diamonds for 8x8 blocks. Same as its 16x16 companion option

#define PMV_EARLYSTOP16   0x00080000

Dynamic ME thresholding. PMVfast and EPZS stop search if current best is below some dynamic threshhold. No diamond search is done, only halfpel refinement (if active). Without EARLYSTOP diamond search is always done. That would be much slower, but not really lead to better quality.

#define PMV_EARLYSTOP8   0x08000000

see 16x16 equivalent Same as its 16x16 companion option

#define PMV_EXTSEARCH16   0x00040000

Extends search for 16x16 blocks. Normal PMVfast predicts one start vector and does diamond search around this position. EXTSEARCH means that 2 more start vectors are used: (0,0) and median predictor and diamond search is done for those, too. Makes search slightly slower, but quality sometimes gets better.

#define PMV_EXTSEARCH8   0x04000000

see 16x16 equivalent Same as its 16x16 companion option

#define PMV_HALFPELDIAMOND16   0x00010000

Turns on halfpel precision for 16x16 blocks. switches the search algorithm from 1 or 2 full pixels precision to 1 or 2 half pixel precision.

#define PMV_HALFPELDIAMOND8   0x01000000

see 16x16 equivalent Same as its 16x16 companion option

#define PMV_HALFPELREFINE16   0x00020000

Turns on halfpel refinement step. After normal diamond search, an extra halfpel refinement step is performed. Should always be used if XVID_HALFPEL is on, because it gives a rather big increase in quality.

#define PMV_HALFPELREFINE8   0x02000000

see 16x16 equivalent Same as its 16x16 companion option

#define PMV_OVERLAPPING16   0x00400000

Not implemented. Same as above

#define PMV_OVERLAPPING8   0x40000000

see 16x16 equivalent Same as its 16x16 companion option

#define PMV_QUICKSTOP16   0x00100000

Dynamic ME thresholding. like EARLYSTOP, but not even halfpel refinement is done. Normally worse quality, so it defaults to off. Might be removed, too.

#define PMV_QUICKSTOP8   0x10000000

see 16x16 equivalent Same as its 16x16 companion option

#define PMV_UNRESTRICTED16   0x00200000

Not implemented. "unrestricted ME" is a feature of MPEG4. It's not implemented, so this flag is ignored (not even checked).

#define PMV_UNRESTRICTED8   0x20000000

see 16x16 equivalent Same as its 16x16 companion option

#define PMV_USESQUARES16   0x00800000

Use square pattern. Replace the diamond search with a square search.

#define PMV_USESQUARES8   0x80000000

see 16x16 equivalent Same as its 16x16 companion option

Author : XviD team <xvid-devel@xvid.org>	Date : 2003-02-13