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L_JP2_INSTSET_BOX

Summary

The L_JP2_INSTSET_BOX structure provides information for Instruction Set box.

Syntax

typedef struct _tagL_JP2_INSTSET_BOX 
{ 
   L_UINT32         uStructSize; 
   L_UINT16         uItyp; 
   L_UINT16         uRept; 
   L_UINT32         uTick; 
   L_UINT32         uNumOfInst; 
   pL_JP2_INSTPARAM pInstParam; 
} L_JP2_INSTSET_BOX,   *pL_JP2_INSTSET_BOX;

Members

uStructSize

Size of this structure, in bytes. Use the sizeof operator to calculate this value.

uItyp

Instruction type. This field specifies the type of instruction, and thus which instruction parameters shall be found within this Composition Instruction box. The meaning of each bit in the flag is as follows:

Value	Meaning
0000 0000 0000 0000	No instructions are present, and thus no instructions are defined for the compositing layers in the file.
xxxx xxxx xxxx xxx1	Each instruction contains XO and YO parameters.
xxxx xxxx xxxx xx1x	Each instruction contains the WIDTH and HEIGHT parameters.
xxxx xxxx xxxx x1xx	Each instruction contains the LIFE, N and PERSIST animation parameters.
xxxx xxxx xx1x xxxx	Each instruction defines the crop parameters XC, YC, WC, and HC.

All other values reserved.

uRept

Repetition. This field specifies the number of times to repeat this particular set of instructions.

uTick

Duration of timer tick. This field specifies the duration of the timer tick (used by the LIFE instruction parameter) in milliseconds.

uNumOfInst

Number of Instruction parameters.

pInstParam

Array of Instruction parameters specifies a series of instruction parameters for a single instruction. The size of this array shall be uNumOfInst.

Comments

An Instruction Set box contains a set of rendering instructions, each represented through a series of composition parameters. This box is defined in JPX and above file formats.