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Use const qualifier for mqc_states 

This allows more compiler optimizations.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
This commit is contained in:
Stefan Weil 2017-08-14 14:36:06 +02:00
parent 10e6ce2c2c
commit bc59410f25
3 changed files with 6 additions and 6 deletions
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2
src/lib/openjp2/mqc.c
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@ -79,7 +79,7 @@ static void opj_mqc_setbits(opj_mqc_t *mqc);
/* <summary> */ /* <summary> */
/* This array defines all the possible states for a context. */ /* This array defines all the possible states for a context. */
/* </summary> */ /* </summary> */
static opj_mqc_state_t mqc_states[47 * 2] = { static const opj_mqc_state_t mqc_states[47 * 2] = {
{0x5601, 0, &mqc_states[2], &mqc_states[3]}, {0x5601, 0, &mqc_states[2], &mqc_states[3]},
{0x5601, 1, &mqc_states[3], &mqc_states[2]}, {0x5601, 1, &mqc_states[3], &mqc_states[2]},
{0x3401, 0, &mqc_states[4], &mqc_states[12]}, {0x3401, 0, &mqc_states[4], &mqc_states[12]},

8
src/lib/openjp2/mqc.h
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@ -61,9 +61,9 @@ typedef struct opj_mqc_state {
/** the Most Probable Symbol (0 or 1) */ /** the Most Probable Symbol (0 or 1) */
OPJ_UINT32 mps; OPJ_UINT32 mps;
/** next state if the next encoded symbol is the MPS */ /** next state if the next encoded symbol is the MPS */
struct opj_mqc_state *nmps; const struct opj_mqc_state *nmps;
/** next state if the next encoded symbol is the LPS */ /** next state if the next encoded symbol is the LPS */
struct opj_mqc_state *nlps; const struct opj_mqc_state *nlps;
} opj_mqc_state_t; } opj_mqc_state_t;
#define MQC_NUMCTXS 19 #define MQC_NUMCTXS 19
@ -87,9 +87,9 @@ typedef struct opj_mqc {
/** pointer to the end of the buffer */ /** pointer to the end of the buffer */
OPJ_BYTE *end; OPJ_BYTE *end;
/** Array of contexts */ /** Array of contexts */
opj_mqc_state_t *ctxs[MQC_NUMCTXS]; const opj_mqc_state_t *ctxs[MQC_NUMCTXS];
/** Active context */ /** Active context */
opj_mqc_state_t **curctx; const opj_mqc_state_t **curctx;
/* lut_ctxno_zc shifted by (1 << 9) * bandno */ /* lut_ctxno_zc shifted by (1 << 9) * bandno */
const OPJ_BYTE* lut_ctxno_zc_orient; const OPJ_BYTE* lut_ctxno_zc_orient;
/** Original value of the 2 bytes at end[0] and end[1] */ /** Original value of the 2 bytes at end[0] and end[1] */

2
src/lib/openjp2/mqc_inl.h
View File

@ -157,7 +157,7 @@ static INLINE OPJ_UINT32 opj_mqc_raw_decode(opj_mqc_t *mqc)
} }
#define DOWNLOAD_MQC_VARIABLES(mqc, curctx, c, a, ct) \ #define DOWNLOAD_MQC_VARIABLES(mqc, curctx, c, a, ct) \
register opj_mqc_state_t **curctx = mqc->curctx; \ register const opj_mqc_state_t **curctx = mqc->curctx; \
register OPJ_UINT32 c = mqc->c; \ register OPJ_UINT32 c = mqc->c; \
register OPJ_UINT32 a = mqc->a; \ register OPJ_UINT32 a = mqc->a; \
register OPJ_UINT32 ct = mqc->ct register OPJ_UINT32 ct = mqc->ct