/*
- * The copyright in this software is being made available under the 2-clauses
- * BSD License, included below. This software may be subject to other third
+ * The copyright in this software is being made available under the 2-clauses
+ * BSD License, included below. This software may be subject to other third
* party and contributor rights, including patent rights, and no such rights
* are granted under this license.
*
* Copyright (c) 2002-2014, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
- * Copyright (c) 2003-2007, Francois-Olivier Devaux
+ * Copyright (c) 2003-2007, Francois-Olivier Devaux
* Copyright (c) 2003-2014, Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
#ifndef __MQC_INL_H
#define __MQC_INL_H
-/**
-FIXME DOC
-@param mqc MQC handle
-@return
-*/
-static INLINE OPJ_INT32 opj_mqc_mpsexchange(opj_mqc_t *const mqc) {
- OPJ_INT32 d;
- if (mqc->a < (*mqc->curctx)->qeval) {
- d = (OPJ_INT32)(1 - (*mqc->curctx)->mps);
- *mqc->curctx = (*mqc->curctx)->nlps;
- } else {
- d = (OPJ_INT32)(*mqc->curctx)->mps;
- *mqc->curctx = (*mqc->curctx)->nmps;
- }
-
- return d;
+
+/* For internal use of opj_mqc_decode_macro() */
+#define opj_mqc_mpsexchange_macro(d, curctx, a) \
+{ \
+ if (a < (*curctx)->qeval) { \
+ d = !((*curctx)->mps); \
+ *curctx = (*curctx)->nlps; \
+ } else { \
+ d = (*curctx)->mps; \
+ *curctx = (*curctx)->nmps; \
+ } \
+}
+
+/* For internal use of opj_mqc_decode_macro() */
+#define opj_mqc_lpsexchange_macro(d, curctx, a) \
+{ \
+ if (a < (*curctx)->qeval) { \
+ a = (*curctx)->qeval; \
+ d = (*curctx)->mps; \
+ *curctx = (*curctx)->nmps; \
+ } else { \
+ a = (*curctx)->qeval; \
+ d = !((*curctx)->mps); \
+ *curctx = (*curctx)->nlps; \
+ } \
}
+
/**
-FIXME DOC
+Decode a symbol using raw-decoder. Cfr p.506 TAUBMAN
@param mqc MQC handle
-@return
+@return Returns the decoded symbol (0 or 1)
*/
-static INLINE OPJ_INT32 opj_mqc_lpsexchange(opj_mqc_t *const mqc) {
- OPJ_INT32 d;
- if (mqc->a < (*mqc->curctx)->qeval) {
- mqc->a = (*mqc->curctx)->qeval;
- d = (OPJ_INT32)(*mqc->curctx)->mps;
- *mqc->curctx = (*mqc->curctx)->nmps;
- } else {
- mqc->a = (*mqc->curctx)->qeval;
- d = (OPJ_INT32)(1 - (*mqc->curctx)->mps);
- *mqc->curctx = (*mqc->curctx)->nlps;
- }
-
- return d;
+static INLINE OPJ_UINT32 opj_mqc_raw_decode(opj_mqc_t *mqc)
+{
+ OPJ_UINT32 d;
+ if (mqc->ct == 0) {
+ /* Given opj_mqc_raw_init_dec() we know that at some point we will */
+ /* have a 0xFF 0xFF artificial marker */
+ if (mqc->c == 0xff) {
+ if (*mqc->bp > 0x8f) {
+ mqc->c = 0xff;
+ mqc->ct = 8;
+ } else {
+ mqc->c = *mqc->bp;
+ mqc->bp ++;
+ mqc->ct = 7;
+ }
+ } else {
+ mqc->c = *mqc->bp;
+ mqc->bp ++;
+ mqc->ct = 8;
+ }
+ }
+ mqc->ct--;
+ d = ((OPJ_UINT32)mqc->c >> mqc->ct) & 0x01U;
+
+ return d;
+}
+
+
+#define opj_mqc_bytein_macro(mqc, c, ct) \
+{ \
+ OPJ_UINT32 l_c; \
+ /* Given opj_mqc_init_dec() we know that at some point we will */ \
+ /* have a 0xFF 0xFF artificial marker */ \
+ l_c = *(mqc->bp + 1); \
+ if (*mqc->bp == 0xff) { \
+ if (l_c > 0x8f) { \
+ c += 0xff00; \
+ ct = 8; \
+ mqc->end_of_byte_stream_counter ++; \
+ } else { \
+ mqc->bp++; \
+ c += l_c << 9; \
+ ct = 7; \
+ } \
+ } else { \
+ mqc->bp++; \
+ c += l_c << 8; \
+ ct = 8; \
+ } \
+}
+
+/* For internal use of opj_mqc_decode_macro() */
+#define opj_mqc_renormd_macro(mqc, a, c, ct) \
+{ \
+ do { \
+ if (ct == 0) { \
+ opj_mqc_bytein_macro(mqc, c, ct); \
+ } \
+ a <<= 1; \
+ c <<= 1; \
+ ct--; \
+ } while (a < 0x8000); \
}
+#define opj_mqc_decode_macro(d, mqc, curctx, a, c, ct) \
+{ \
+ /* Implements ISO 15444-1 C.3.2 Decoding a decision (DECODE) */ \
+ /* Note: alternate "J.2 - Decoding an MPS or an LPS in the */ \
+ /* software-conventions decoder" has been tried, but does not bring any */ \
+ /* improvement. See https://github.com/uclouvain/openjpeg/issues/921 */ \
+ a -= (*curctx)->qeval; \
+ if ((c >> 16) < (*curctx)->qeval) { \
+ opj_mqc_lpsexchange_macro(d, curctx, a); \
+ opj_mqc_renormd_macro(mqc, a, c, ct); \
+ } else { \
+ c -= (*curctx)->qeval << 16; \
+ if ((a & 0x8000) == 0) { \
+ opj_mqc_mpsexchange_macro(d, curctx, a); \
+ opj_mqc_renormd_macro(mqc, a, c, ct); \
+ } else { \
+ d = (*curctx)->mps; \
+ } \
+ } \
+}
+
+#define DOWNLOAD_MQC_VARIABLES(mqc, curctx, c, a, ct) \
+ register opj_mqc_state_t **curctx = mqc->curctx; \
+ register OPJ_UINT32 c = mqc->c; \
+ register OPJ_UINT32 a = mqc->a; \
+ register OPJ_UINT32 ct = mqc->ct
+
+#define UPLOAD_MQC_VARIABLES(mqc, curctx, c, a, ct) \
+ mqc->curctx = curctx; \
+ mqc->c = c; \
+ mqc->a = a; \
+ mqc->ct = ct;
+
/**
Input a byte
@param mqc MQC handle
*/
-#ifdef MQC_PERF_OPT
-static INLINE void opj_mqc_bytein(opj_mqc_t *const mqc) {
- unsigned int i = *((unsigned int *) mqc->bp);
- mqc->c += i & 0xffff00;
- mqc->ct = i & 0x0f;
- mqc->bp += (i >> 2) & 0x04;
-}
-#else
-static INLINE void opj_mqc_bytein(opj_mqc_t *const mqc) {
- if (mqc->bp != mqc->end) {
- OPJ_UINT32 c;
- if (mqc->bp + 1 != mqc->end) {
- c = *(mqc->bp + 1);
- } else {
- c = 0xff;
- }
- if (*mqc->bp == 0xff) {
- if (c > 0x8f) {
- mqc->c += 0xff00;
- mqc->ct = 8;
- } else {
- mqc->bp++;
- mqc->c += c << 9;
- mqc->ct = 7;
- }
- } else {
- mqc->bp++;
- mqc->c += c << 8;
- mqc->ct = 8;
- }
- } else {
- mqc->c += 0xff00;
- mqc->ct = 8;
- }
+static INLINE void opj_mqc_bytein(opj_mqc_t *const mqc)
+{
+ opj_mqc_bytein_macro(mqc, mqc->c, mqc->ct);
}
-#endif
/**
Renormalize mqc->a and mqc->c while decoding
@param mqc MQC handle
*/
-static INLINE void opj_mqc_renormd(opj_mqc_t *const mqc) {
- do {
- if (mqc->ct == 0) {
- opj_mqc_bytein(mqc);
- }
- mqc->a <<= 1;
- mqc->c <<= 1;
- mqc->ct--;
- } while (mqc->a < 0x8000);
-}
+#define opj_mqc_renormd(mqc) \
+ opj_mqc_renormd_macro(mqc, mqc->a, mqc->c, mqc->ct)
/**
Decode a symbol
+@param d OPJ_UINT32 value where to store the decoded symbol
@param mqc MQC handle
-@return Returns the decoded symbol (0 or 1)
+@return Returns the decoded symbol (0 or 1) in d
*/
-static INLINE OPJ_INT32 opj_mqc_decode(opj_mqc_t *const mqc) {
- OPJ_INT32 d;
- mqc->a -= (*mqc->curctx)->qeval;
- if ((mqc->c >> 16) < (*mqc->curctx)->qeval) {
- d = opj_mqc_lpsexchange(mqc);
- opj_mqc_renormd(mqc);
- } else {
- mqc->c -= (*mqc->curctx)->qeval << 16;
- if ((mqc->a & 0x8000) == 0) {
- d = opj_mqc_mpsexchange(mqc);
- opj_mqc_renormd(mqc);
- } else {
- d = (OPJ_INT32)(*mqc->curctx)->mps;
- }
- }
-
- return d;
-}
+#define opj_mqc_decode(d, mqc) \
+ opj_mqc_decode_macro(d, mqc, mqc->curctx, mqc->a, mqc->c, mqc->ct)
#endif /* __MQC_INL_H */
projects / openjpeg.git / blobdiff