/*
+ * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
+ * Copyright (c) 2002-2007, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
- * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
- * Copyright (c) 2005, Herv� Drolon, FreeImage Team
- * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
+ * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
+ * Copyright (c) 2005, Herve Drolon, FreeImage Team
+ * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
The functions in MQC.C have for goal to realize the MQ-coder operations. The functions
in MQC.C are used by some function in T1.C.
*/
-
+#include "openjpeg.h"
/** @defgroup MQC MQC - Implementation of an MQ-Coder */
/*@{*/
This struct defines the state of a context.
*/
typedef struct opj_mqc_state {
- /** the probability of the Least Probable Symbol (0.75->0x8000, 1.5->0xffff) */
- unsigned int qeval;
- /** the Most Probable Symbol (0 or 1) */
- int mps;
- /** next state if the next encoded symbol is the MPS */
- struct opj_mqc_state *nmps;
- /** next state if the next encoded symbol is the LPS */
- struct opj_mqc_state *nlps;
+ /** the probability of the Least Probable Symbol (0.75->0x8000, 1.5->0xffff) */
+ OPJ_UINT32 qeval;
+ /** the Most Probable Symbol (0 or 1) */
+ OPJ_INT32 mps;
+ /** next state if the next encoded symbol is the MPS */
+ struct opj_mqc_state *nmps;
+ /** next state if the next encoded symbol is the LPS */
+ struct opj_mqc_state *nlps;
} opj_mqc_state_t;
#define MQC_NUMCTXS 32
MQ coder
*/
typedef struct opj_mqc {
- unsigned int c;
- unsigned int a;
- unsigned int ct;
- unsigned char *bp;
- unsigned char *start;
- unsigned char *end;
- opj_mqc_state_t *ctxs[MQC_NUMCTXS];
- opj_mqc_state_t **curctx;
+ OPJ_UINT32 c;
+ OPJ_UINT32 a;
+ OPJ_UINT32 ct;
+ OPJ_BYTE *bp;
+ OPJ_BYTE *start;
+ OPJ_BYTE *end;
+ opj_mqc_state_t *ctxs[MQC_NUMCTXS];
+ opj_mqc_state_t **curctx;
} opj_mqc_t;
-/** @name Local static functions */
-/*@{*/
-/* ----------------------------------------------------------------------- */
-/**
-Output a byte, doing bit-stuffing if necessary.
-After a 0xff byte, the next byte must be smaller than 0x90.
-@param mqc MQC handle
-*/
-static void mqc_byteout(opj_mqc_t *mqc);
-/**
-Renormalize mqc->a and mqc->c while encoding, so that mqc->a stays between 0x8000 and 0x10000
-@param mqc MQC handle
-*/
-static void mqc_renorme(opj_mqc_t *mqc);
-/**
-Encode the most probable symbol
-@param mqc MQC handle
-*/
-static void mqc_codemps(opj_mqc_t *mqc);
-/**
-Encode the most least symbol
-@param mqc MQC handle
-*/
-static void mqc_codelps(opj_mqc_t *mqc);
-/**
-Fill mqc->c with 1's for flushing
-@param mqc MQC handle
-*/
-static void mqc_setbits(opj_mqc_t *mqc);
-/**
-FIXME: documentation ???
-@param mqc MQC handle
-@return
-*/
-static int mqc_mpsexchange(opj_mqc_t *mqc);
-/**
-FIXME: documentation ???
-@param mqc MQC handle
-@return
-*/
-static int mqc_lpsexchange(opj_mqc_t *mqc);
-/**
-Input a byte
-@param mqc MQC handle
-*/
-static void mqc_bytein(opj_mqc_t *mqc);
-/**
-Renormalize mqc->a and mqc->c while decoding
-@param mqc MQC handle
-*/
-static void mqc_renormd(opj_mqc_t *mqc);
-/* ----------------------------------------------------------------------- */
-/*@}*/
-
/** @name Exported functions */
/*@{*/
/* ----------------------------------------------------------------------- */
Create a new MQC handle
@return Returns a new MQC handle if successful, returns NULL otherwise
*/
-opj_mqc_t* mqc_create();
+opj_mqc_t* mqc_create(void);
/**
Destroy a previously created MQC handle
@param mqc MQC handle to destroy
@param mqc MQC handle
@return Returns the number of bytes already encoded
*/
-int mqc_numbytes(opj_mqc_t *mqc);
+OPJ_UINT32 mqc_numbytes(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)
@param msb The MSB of the new state of the context
@param prob Number that identifies the probability of the symbols for the new state of the context
*/
-void mqc_setstate(opj_mqc_t *mqc, int ctxno, int msb, int prob);
+void mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb, OPJ_INT32 prob);
/**
Initialize the encoder
@param mqc MQC handle
@param bp Pointer to the start of the buffer where the bytes will be written
*/
-void mqc_init_enc(opj_mqc_t *mqc, unsigned char *bp);
+void mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp);
/**
Set the current context used for coding/decoding
@param mqc MQC handle
@param ctxno Number that identifies the context
*/
-void mqc_setcurctx(opj_mqc_t *mqc, int ctxno);
+#define mqc_setcurctx(mqc, ctxno) (mqc)->curctx = &(mqc)->ctxs[(OPJ_UINT32)(ctxno)]
/**
Encode a symbol using the MQ-coder
@param mqc MQC handle
@param d The symbol to be encoded (0 or 1)
*/
-void mqc_encode(opj_mqc_t *mqc, int d);
+void mqc_encode(opj_mqc_t *mqc, OPJ_UINT32 d);
/**
Flush the encoder, so that all remaining data is written
@param mqc MQC handle
@param mqc MQC handle
@param d The symbol to be encoded (0 or 1)
*/
-void mqc_bypass_enc(opj_mqc_t *mqc, int d);
+void mqc_bypass_enc(opj_mqc_t *mqc, OPJ_UINT32 d);
/**
BYPASS mode switch, flush operation
<h2>Not fully implemented and tested !!</h2>
@param mqc MQC handle
@return Returns 1 (always)
*/
-int mqc_bypass_flush_enc(opj_mqc_t *mqc);
+OPJ_UINT32 mqc_bypass_flush_enc(opj_mqc_t *mqc);
/**
RESET mode switch
@param mqc MQC handle
@param mqc MQC handle
@return Returns 1 (always)
*/
-int mqc_restart_enc(opj_mqc_t *mqc);
+OPJ_UINT32 mqc_restart_enc(opj_mqc_t *mqc);
/**
RESTART mode switch (TERMALL) reinitialisation
@param mqc MQC handle
@param bp Pointer to the start of the buffer from which the bytes will be read
@param len Length of the input buffer
*/
-void mqc_init_dec(opj_mqc_t *mqc, unsigned char *bp, int len);
+void mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len);
/**
Decode a symbol
@param mqc MQC handle
@return Returns the decoded symbol (0 or 1)
*/
-int mqc_decode(opj_mqc_t *mqc);
+OPJ_UINT32 mqc_decode(opj_mqc_t *mqc);
/* ----------------------------------------------------------------------- */
/*@}*/
projects / openjpeg.git / blobdiff