Data Structures
struct	opj_mqc_state
	This struct defines the state of a context. More...

struct	opj_mqc
	MQ coder. More...

Macros
#define	MQC_NUMCTXS 19

Typedefs
typedef struct opj_mqc_state	opj_mqc_state_t
	This struct defines the state of a context. More...

typedef struct opj_mqc	opj_mqc_t
	MQ coder. More...

Local static functions
static void	opj_mqc_byteout (opj_mqc_t *mqc)
	Output a byte, doing bit-stuffing if necessary. More...

static void	opj_mqc_renorme (opj_mqc_t *mqc)
	Renormalize mqc->a and mqc->c while encoding, so that mqc->a stays between 0x8000 and 0x10000. More...

static void	opj_mqc_codemps (opj_mqc_t *mqc)
	Encode the most probable symbol. More...

static void	opj_mqc_codelps (opj_mqc_t *mqc)
	Encode the most least symbol. More...

static void	opj_mqc_setbits (opj_mqc_t *mqc)
	Fill mqc->c with 1's for flushing. More...

static INLINE OPJ_INT32	opj_mqc_mpsexchange (opj_mqc_t *const mqc)
	FIXME DOC. More...

static INLINE OPJ_INT32	opj_mqc_lpsexchange (opj_mqc_t *const mqc)
	FIXME DOC. More...

static INLINE void	opj_mqc_bytein (opj_mqc_t *const mqc)
	Input a byte. More...

static INLINE void	opj_mqc_renormd (opj_mqc_t *const mqc)
	Renormalize mqc->a and mqc->c while decoding. More...

Exported functions
opj_mqc_t *	opj_mqc_create (void)
	Create a new MQC handle. More...

void	opj_mqc_destroy (opj_mqc_t *mqc)
	Destroy a previously created MQC handle. More...

OPJ_UINT32	opj_mqc_numbytes (opj_mqc_t *mqc)
	Return the number of bytes written/read since initialisation. More...

void	opj_mqc_resetstates (opj_mqc_t *mqc)
	Reset the states of all the context of the coder/decoder (each context is set to a state where 0 and 1 are more or less equiprobable) More...

void	opj_mqc_setstate (opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb, OPJ_INT32 prob)
	Set the state of a particular context. More...

void	opj_mqc_init_enc (opj_mqc_t mqc, OPJ_BYTE bp)
	Initialize the encoder. More...

void	opj_mqc_encode (opj_mqc_t *mqc, OPJ_UINT32 d)
	Encode a symbol using the MQ-coder. More...

void	opj_mqc_flush (opj_mqc_t *mqc)
	Flush the encoder, so that all remaining data is written. More...

void	opj_mqc_bypass_init_enc (opj_mqc_t *mqc)
	BYPASS mode switch, initialization operation. More...

void	opj_mqc_bypass_enc (opj_mqc_t *mqc, OPJ_UINT32 d)
	BYPASS mode switch, coding operation. More...

OPJ_UINT32	opj_mqc_bypass_flush_enc (opj_mqc_t *mqc)
	BYPASS mode switch, flush operation. More...

void	opj_mqc_reset_enc (opj_mqc_t *mqc)
	RESET mode switch. More...

OPJ_UINT32	opj_mqc_restart_enc (opj_mqc_t *mqc)
	RESTART mode switch (TERMALL) More...

void	opj_mqc_restart_init_enc (opj_mqc_t *mqc)
	RESTART mode switch (TERMALL) reinitialisation. More...

void	opj_mqc_erterm_enc (opj_mqc_t *mqc)
	ERTERM mode switch (PTERM) More...

void	opj_mqc_segmark_enc (opj_mqc_t *mqc)
	SEGMARK mode switch (SEGSYM) More...

OPJ_BOOL	opj_mqc_init_dec (opj_mqc_t mqc, OPJ_BYTE bp, OPJ_UINT32 len)
	Initialize the decoder. More...

OPJ_INT32	opj_mqc_decode (opj_mqc_t *const mqc)
	Decode a symbol. More...

#define	opj_mqc_setcurctx(mqc, ctxno) (mqc)->curctx = &(mqc)->ctxs[(OPJ_UINT32)(ctxno)]
	Set the current context used for coding/decoding. More...

Detailed Description

Macro Definition Documentation

#define MQC_NUMCTXS 19

Referenced by opj_mqc_resetstates().

#define opj_mqc_setcurctx	(	mqc,
		ctxno
	)	(mqc)->curctx = &(mqc)->ctxs[(OPJ_UINT32)(ctxno)]

Set the current context used for coding/decoding.

Parameters

mqc	MQC handle
ctxno	Number that identifies the context

Referenced by opj_mqc_init_dec(), opj_mqc_init_enc(), opj_mqc_restart_init_enc(), opj_mqc_segmark_enc(), opj_t1_dec_clnpass(), opj_t1_dec_clnpass_step(), opj_t1_dec_clnpass_step_partial(), opj_t1_dec_clnpass_step_vsc(), opj_t1_dec_refpass_step_mqc(), opj_t1_dec_refpass_step_mqc_vsc(), opj_t1_dec_sigpass_step_mqc(), opj_t1_dec_sigpass_step_mqc_vsc(), opj_t1_enc_clnpass(), opj_t1_enc_clnpass_step(), opj_t1_enc_refpass_step(), and opj_t1_enc_sigpass_step().

Typedef Documentation

typedef struct opj_mqc_state opj_mqc_state_t

This struct defines the state of a context.

typedef struct opj_mqc opj_mqc_t

MQ coder.

Function Documentation

void opj_mqc_bypass_enc	(	opj_mqc_t *	mqc,
		OPJ_UINT32	d
	)

BYPASS mode switch, coding operation.

JPEG 2000 p 505.

Not fully implemented and tested !!

Parameters

mqc	MQC handle
d	The symbol to be encoded (0 or 1)

References opj_mqc::bp, opj_mqc::c, and opj_mqc::ct.

Referenced by opj_t1_enc_refpass_step(), and opj_t1_enc_sigpass_step().

OPJ_UINT32 opj_mqc_bypass_flush_enc ( opj_mqc_t * mqc )

BYPASS mode switch, flush operation.

Not fully implemented and tested !!

Parameters

mqc	MQC handle

Returns: Returns 1 (always)

References opj_mqc::bp, opj_mqc::c, and opj_mqc::ct.

void opj_mqc_bypass_init_enc ( opj_mqc_t * mqc )

BYPASS mode switch, initialization operation.

JPEG 2000 p 505.

Not fully implemented and tested !!

Parameters

mqc	MQC handle

References opj_mqc::c, and opj_mqc::ct.

Referenced by opj_t1_encode_cblk().

static void opj_mqc_bytein ( opj_mqc_t *const mqc )

static

Input a byte.

Parameters

mqc	MQC handle

References opj_mqc::bp, opj_mqc::c, opj_mqc::ct, and opj_mqc::end.

Referenced by opj_mqc_init_dec(), and opj_mqc_renormd().

static void opj_mqc_byteout ( opj_mqc_t * mqc )

static

Output a byte, doing bit-stuffing if necessary.

After a 0xff byte, the next byte must be smaller than 0x90.

Parameters

mqc	MQC handle

References opj_mqc::bp, opj_mqc::c, opj_mqc::ct, and opj_mqc::start.

Referenced by opj_mqc_erterm_enc(), opj_mqc_flush(), opj_mqc_renorme(), and opj_mqc_restart_enc().

static void opj_mqc_codelps ( opj_mqc_t * mqc )

static

Encode the most least symbol.

Parameters

mqc	MQC handle

References opj_mqc::a, opj_mqc::c, opj_mqc::curctx, and opj_mqc_renorme().

Referenced by opj_mqc_encode().

static void opj_mqc_codemps ( opj_mqc_t * mqc )

static

Encode the most probable symbol.

Parameters

mqc	MQC handle

References opj_mqc::a, opj_mqc::c, opj_mqc::curctx, and opj_mqc_renorme().

Referenced by opj_mqc_encode().

opj_mqc_t* opj_mqc_create ( void )

Create a new MQC handle.

Returns: Returns a new MQC handle if successful, returns NULL otherwise

References opj_malloc().

Referenced by opj_t1_create().

OPJ_INT32 opj_mqc_decode ( opj_mqc_t *const mqc )

Decode a symbol.

Parameters

mqc	MQC handle

Returns: Returns the decoded symbol (0 or 1)

References opj_mqc::a, opj_mqc::c, opj_mqc::curctx, opj_mqc_lpsexchange(), opj_mqc_mpsexchange(), and opj_mqc_renormd().

Referenced by opj_t1_dec_clnpass(), opj_t1_dec_clnpass_step(), opj_t1_dec_clnpass_step_partial(), opj_t1_dec_clnpass_step_vsc(), opj_t1_dec_refpass_step_mqc(), opj_t1_dec_refpass_step_mqc_vsc(), opj_t1_dec_sigpass_step_mqc(), and opj_t1_dec_sigpass_step_mqc_vsc().

void opj_mqc_destroy ( opj_mqc_t * mqc )

Destroy a previously created MQC handle.

Parameters

mqc	MQC handle to destroy

References opj_free().

Referenced by opj_t1_destroy().

void opj_mqc_encode	(	opj_mqc_t *	mqc,
		OPJ_UINT32	d
	)

Encode a symbol using the MQ-coder.

Parameters

mqc	MQC handle
d	The symbol to be encoded (0 or 1)

References opj_mqc::curctx, opj_mqc_codelps(), and opj_mqc_codemps().

Referenced by opj_mqc_segmark_enc(), opj_t1_enc_clnpass(), opj_t1_enc_clnpass_step(), opj_t1_enc_refpass_step(), and opj_t1_enc_sigpass_step().

void opj_mqc_erterm_enc ( opj_mqc_t * mqc )

ERTERM mode switch (PTERM)

Parameters

mqc	MQC handle

References opj_mqc::bp, opj_mqc::c, opj_mqc::ct, and opj_mqc_byteout().

Referenced by opj_t1_encode_cblk().

void opj_mqc_flush ( opj_mqc_t * mqc )

Flush the encoder, so that all remaining data is written.

Parameters

mqc	MQC handle

References opj_mqc::bp, opj_mqc::c, opj_mqc::ct, opj_mqc_byteout(), and opj_mqc_setbits().

Referenced by opj_t1_encode_cblk().

OPJ_BOOL opj_mqc_init_dec	(	opj_mqc_t *	mqc,
		OPJ_BYTE *	bp,
		OPJ_UINT32	len
	)

Initialize the decoder.

Parameters

mqc	MQC handle
bp	Pointer to the start of the buffer from which the bytes will be read
len	Length of the input buffer

References opj_mqc::a, opj_mqc::bp, opj_mqc::c, opj_mqc::ct, opj_mqc::end, OPJ_FALSE, opj_free(), opj_mqc_bytein(), opj_mqc_setcurctx, opj_realloc(), OPJ_TRUE, and opj_mqc::start.

Referenced by opj_t1_decode_cblk().

void opj_mqc_init_enc	(	opj_mqc_t *	mqc,
		OPJ_BYTE *	bp
	)

Initialize the encoder.

Parameters

mqc	MQC handle
bp	Pointer to the start of the buffer where the bytes will be written

References opj_mqc::a, opj_mqc::bp, opj_mqc::c, opj_mqc::ct, opj_mqc_setcurctx, and opj_mqc::start.

Referenced by opj_t1_encode_cblk().

static INLINE OPJ_INT32 opj_mqc_lpsexchange ( opj_mqc_t *const mqc )

static

FIXME DOC.

Parameters

mqc	MQC handle

Returns

References opj_mqc::a, and opj_mqc::curctx.

Referenced by opj_mqc_decode().

static INLINE OPJ_INT32 opj_mqc_mpsexchange ( opj_mqc_t *const mqc )

static

FIXME DOC.

Parameters

mqc	MQC handle

Returns

References opj_mqc::a, opj_mqc::curctx, and opj_mqc_state::mps.

Referenced by opj_mqc_decode().

OPJ_UINT32 opj_mqc_numbytes ( opj_mqc_t * mqc )

Return the number of bytes written/read since initialisation.

Parameters

mqc	MQC handle

Returns: Returns the number of bytes already encoded

References opj_mqc::bp, and opj_mqc::start.

Referenced by opj_t1_encode_cblk().

static INLINE void opj_mqc_renormd ( opj_mqc_t *const mqc )

static

Renormalize mqc->a and mqc->c while decoding.

Parameters

mqc	MQC handle

References opj_mqc::a, opj_mqc::c, opj_mqc::ct, and opj_mqc_bytein().

Referenced by opj_mqc_decode().

static void opj_mqc_renorme ( opj_mqc_t * mqc )

static

Renormalize mqc->a and mqc->c while encoding, so that mqc->a stays between 0x8000 and 0x10000.

Parameters

mqc	MQC handle

References opj_mqc::a, opj_mqc::c, opj_mqc::ct, and opj_mqc_byteout().

Referenced by opj_mqc_codelps(), and opj_mqc_codemps().

void opj_mqc_reset_enc ( opj_mqc_t * mqc )

RESET mode switch.

Parameters

mqc	MQC handle

References opj_mqc_resetstates(), opj_mqc_setstate(), T1_CTXNO_AGG, T1_CTXNO_UNI, and T1_CTXNO_ZC.

Referenced by opj_t1_encode_cblk().

void opj_mqc_resetstates ( opj_mqc_t * mqc )

Reset the states of all the context of the coder/decoder (each context is set to a state where 0 and 1 are more or less equiprobable)

Parameters

mqc	MQC handle

References opj_mqc::ctxs, MQC_NUMCTXS, and mqc_states.

Referenced by opj_mqc_reset_enc(), opj_t1_decode_cblk(), and opj_t1_encode_cblk().

OPJ_UINT32 opj_mqc_restart_enc ( opj_mqc_t * mqc )

RESTART mode switch (TERMALL)

Parameters

mqc	MQC handle

Returns: Returns 1 (always)

References opj_mqc::c, opj_mqc::ct, and opj_mqc_byteout().

void opj_mqc_restart_init_enc ( opj_mqc_t * mqc )

RESTART mode switch (TERMALL) reinitialisation.

Parameters

mqc	MQC handle

References opj_mqc::a, opj_mqc::bp, opj_mqc::c, opj_mqc::ct, and opj_mqc_setcurctx.

Referenced by opj_t1_encode_cblk().

void opj_mqc_segmark_enc ( opj_mqc_t * mqc )

SEGMARK mode switch (SEGSYM)

Parameters

mqc	MQC handle

References opj_mqc_encode(), and opj_mqc_setcurctx.

Referenced by opj_t1_encode_cblk().

static void opj_mqc_setbits ( opj_mqc_t * mqc )

static

Fill mqc->c with 1's for flushing.

Parameters

mqc	MQC handle

References opj_mqc::a, and opj_mqc::c.

Referenced by opj_mqc_flush().

void opj_mqc_setstate	(	opj_mqc_t *	mqc,
		OPJ_UINT32	ctxno,
		OPJ_UINT32	msb,
		OPJ_INT32	prob
	)

Set the state of a particular context.

Parameters

mqc	MQC handle
ctxno	Number that identifies the context
msb	The MSB of the new state of the context
prob	Number that identifies the probability of the symbols for the new state of the context

References opj_mqc::ctxs.

Referenced by opj_mqc_reset_enc(), opj_t1_decode_cblk(), and opj_t1_encode_cblk().

Data Structures

Macros

Typedefs

Local static functions

Exported functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Function Documentation

Not fully implemented and tested !!

Not fully implemented and tested !!

Not fully implemented and tested !!