OpenJPEG  2.2.0
mqc.h
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1 /*
2  * The copyright in this software is being made available under the 2-clauses
3  * BSD License, included below. This software may be subject to other third
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7  * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
8  * Copyright (c) 2002-2014, Professor Benoit Macq
9  * Copyright (c) 2001-2003, David Janssens
10  * Copyright (c) 2002-2003, Yannick Verschueren
11  * Copyright (c) 2003-2007, Francois-Olivier Devaux
12  * Copyright (c) 2003-2014, Antonin Descampe
13  * Copyright (c) 2005, Herve Drolon, FreeImage Team
14  * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
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38 
39 #ifndef OPJ_MQC_H
40 #define OPJ_MQC_H
41 
42 #include "opj_common.h"
43 
54 
58 typedef struct opj_mqc_state {
68 
69 #define MQC_NUMCTXS 19
70 
74 typedef struct opj_mqc {
81  /* only used by decoder, to count the number of times a terminating 0xFF >0x8F marker is read */
93  /* lut_ctxno_zc shifted by (1 << 9) * bandno */
97 } opj_mqc_t;
98 
99 #include "mqc_inl.h"
100 
103 /* ----------------------------------------------------------------------- */
104 
116 void opj_mqc_resetstates(opj_mqc_t *mqc);
124 void opj_mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb,
125  OPJ_INT32 prob);
131 void opj_mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp);
137 #define opj_mqc_setcurctx(mqc, ctxno) (mqc)->curctx = &(mqc)->ctxs[(OPJ_UINT32)(ctxno)]
138 
143 void opj_mqc_encode(opj_mqc_t *mqc, OPJ_UINT32 d);
148 void opj_mqc_flush(opj_mqc_t *mqc);
155 
162 
175 void opj_mqc_bypass_flush_enc(opj_mqc_t *mqc, OPJ_BOOL erterm);
180 void opj_mqc_reset_enc(opj_mqc_t *mqc);
181 
182 #ifdef notdef
183 
188 OPJ_UINT32 opj_mqc_restart_enc(opj_mqc_t *mqc);
189 #endif
190 
200 void opj_mqc_erterm_enc(opj_mqc_t *mqc);
205 void opj_mqc_segmark_enc(opj_mqc_t *mqc);
206 
225 void opj_mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len,
226  OPJ_UINT32 extra_writable_bytes);
227 
247  OPJ_UINT32 extra_writable_bytes);
248 
249 
258 void opq_mqc_finish_dec(opj_mqc_t *mqc);
259 
265 /*static INLINE OPJ_UINT32 opj_mqc_decode(opj_mqc_t * const mqc);*/
266 /* ----------------------------------------------------------------------- */
270 
271 #endif /* OPJ_MQC_H */
OPJ_UINT32 opj_mqc_bypass_get_extra_bytes(opj_mqc_t *mqc, OPJ_BOOL erterm)
Return number of extra bytes to add to opj_mqc_numbytes() for theĀ² size of a non-terminating BYPASS p...
Definition: mqc.c:371
OPJ_UINT32 qeval
the probability of the Least Probable Symbol (0.75->0x8000, 1.5->0xffff)
Definition: mqc.h:60
OPJ_BYTE * start
pointer to the start of the buffer
Definition: mqc.h:86
opj_mqc_state_t ** curctx
Active context.
Definition: mqc.h:92
void opj_mqc_restart_init_enc(opj_mqc_t *mqc)
RESTART mode switch (TERMALL) reinitialisation.
Definition: mqc.c:442
int OPJ_BOOL
Definition: openjpeg.h:110
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 ...
Definition: mqc.c:546
#define MQC_NUMCTXS
Definition: mqc.h:69
OPJ_UINT32 ct
number of bits already read or free to write
Definition: mqc.h:80
void opj_mqc_bypass_enc(opj_mqc_t *mqc, OPJ_UINT32 d)
BYPASS mode switch, coding operation.
Definition: mqc.c:352
unsigned char OPJ_BYTE
Definition: openjpeg.h:117
int32_t OPJ_INT32
Definition: openjpeg.h:125
OPJ_UINT32 c
temporary buffer where bits are coded or decoded
Definition: mqc.h:76
opj_mqc_state_t * ctxs[MQC_NUMCTXS]
Array of contexts.
Definition: mqc.h:90
This struct defines the state of a context.
Definition: mqc.h:58
OPJ_BYTE * bp
pointer to the current position in the buffer
Definition: mqc.h:84
void opj_mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len, OPJ_UINT32 extra_writable_bytes)
Initialize the decoder for MQ decoding.
Definition: mqc.c:507
void opj_mqc_flush(opj_mqc_t *mqc)
Flush the encoder, so that all remaining data is written.
Definition: mqc.c:315
struct opj_mqc_state * nmps
next state if the next encoded symbol is the MPS
Definition: mqc.h:64
struct opj_mqc opj_mqc_t
MQ coder.
#define OPJ_COMMON_CBLK_DATA_EXTRA
Margin for a fake FFFF marker.
Definition: opj_common.h:39
void opq_mqc_finish_dec(opj_mqc_t *mqc)
Terminate RAW/MQC decoding.
Definition: mqc.c:540
OPJ_UINT32 end_of_byte_stream_counter
Definition: mqc.h:82
OPJ_BYTE backup[OPJ_COMMON_CBLK_DATA_EXTRA]
Original value of the 2 bytes at end[0] and end[1].
Definition: mqc.h:96
OPJ_UINT32 mps
the Most Probable Symbol (0 or 1)
Definition: mqc.h:62
void opj_mqc_bypass_init_enc(opj_mqc_t *mqc)
BYPASS mode switch, initialization operation.
Definition: mqc.c:334
struct opj_mqc_state opj_mqc_state_t
This struct defines the state of a context.
OPJ_UINT32 a
only used by MQ decoder
Definition: mqc.h:78
void opj_mqc_segmark_enc(opj_mqc_t *mqc)
SEGMARK mode switch (SEGSYM)
Definition: mqc.c:478
struct opj_mqc_state * nlps
next state if the next encoded symbol is the LPS
Definition: mqc.h:66
void opj_mqc_bypass_flush_enc(opj_mqc_t *mqc, OPJ_BOOL erterm)
BYPASS mode switch, flush operation.
Definition: mqc.c:377
uint32_t OPJ_UINT32
Definition: openjpeg.h:126
void opj_mqc_encode(opj_mqc_t *mqc, OPJ_UINT32 d)
Encode a symbol using the MQ-coder.
Definition: mqc.c:306
void opj_mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp)
Initialize the encoder.
Definition: mqc.c:283
OPJ_BYTE * end
pointer to the end of the buffer
Definition: mqc.h:88
void opj_mqc_reset_enc(opj_mqc_t *mqc)
RESET mode switch.
Definition: mqc.c:415
const OPJ_BYTE * lut_ctxno_zc_orient
Definition: mqc.h:94
void opj_mqc_erterm_enc(opj_mqc_t *mqc)
ERTERM mode switch (PTERM)
Definition: mqc.c:462
OPJ_UINT32 opj_mqc_numbytes(opj_mqc_t *mqc)
Return the number of bytes written/read since initialisation.
Definition: mqc.c:274
MQ coder.
Definition: mqc.h:74
void opj_mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb, OPJ_INT32 prob)
Set the state of a particular context.
Definition: mqc.c:554
void opj_mqc_raw_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len, OPJ_UINT32 extra_writable_bytes)
Initialize the decoder for RAW decoding.
Definition: mqc.c:531