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-rw-r--r--src/3rdparty/libjpeg/src/jdarith.c122
1 files changed, 63 insertions, 59 deletions
diff --git a/src/3rdparty/libjpeg/src/jdarith.c b/src/3rdparty/libjpeg/src/jdarith.c
index ce0f920954..6002481e24 100644
--- a/src/3rdparty/libjpeg/src/jdarith.c
+++ b/src/3rdparty/libjpeg/src/jdarith.c
@@ -4,16 +4,19 @@
* This file was part of the Independent JPEG Group's software:
* Developed 1997-2015 by Guido Vollbeding.
* libjpeg-turbo Modifications:
- * Copyright (C) 2015-2016, D. R. Commander.
+ * Copyright (C) 2015-2018, D. R. Commander.
* For conditions of distribution and use, see the accompanying README.ijg
* file.
*
- * This file contains portable arithmetic entropy decoding routines for JPEG
- * (implementing the ISO/IEC IS 10918-1 and CCITT Recommendation ITU-T T.81).
+ * This file contains portable arithmetic entropy encoding routines for JPEG
+ * (implementing Recommendation ITU-T T.81 | ISO/IEC 10918-1).
*
* Both sequential and progressive modes are supported in this single module.
*
* Suspension is not currently supported in this module.
+ *
+ * NOTE: All referenced figures are from
+ * Recommendation ITU-T T.81 (1992) | ISO/IEC 10918-1:1994.
*/
#define JPEG_INTERNALS
@@ -21,7 +24,7 @@
#include "jpeglib.h"
-#define NEG_1 ((unsigned int)-1)
+#define NEG_1 ((unsigned int)-1)
/* Expanded entropy decoder object for arithmetic decoding. */
@@ -63,18 +66,18 @@ typedef arith_entropy_decoder *arith_entropy_ptr;
* in the lower bits (mask 0x7F).
*/
-#define DC_STAT_BINS 64
-#define AC_STAT_BINS 256
+#define DC_STAT_BINS 64
+#define AC_STAT_BINS 256
LOCAL(int)
-get_byte (j_decompress_ptr cinfo)
+get_byte(j_decompress_ptr cinfo)
/* Read next input byte; we do not support suspension in this module. */
{
struct jpeg_source_mgr *src = cinfo->src;
if (src->bytes_in_buffer == 0)
- if (! (*src->fill_input_buffer) (cinfo))
+ if (!(*src->fill_input_buffer) (cinfo))
ERREXIT(cinfo, JERR_CANT_SUSPEND);
src->bytes_in_buffer--;
return GETJOCTET(*src->next_input_byte++);
@@ -109,9 +112,9 @@ get_byte (j_decompress_ptr cinfo)
*/
LOCAL(int)
-arith_decode (j_decompress_ptr cinfo, unsigned char *st)
+arith_decode(j_decompress_ptr cinfo, unsigned char *st)
{
- register arith_entropy_ptr e = (arith_entropy_ptr) cinfo->entropy;
+ register arith_entropy_ptr e = (arith_entropy_ptr)cinfo->entropy;
register unsigned char nl, nm;
register JLONG qe, temp;
register int sv, data;
@@ -156,8 +159,8 @@ arith_decode (j_decompress_ptr cinfo, unsigned char *st)
*/
sv = *st;
qe = jpeg_aritab[sv & 0x7F]; /* => Qe_Value */
- nl = qe & 0xFF; qe >>= 8; /* Next_Index_LPS + Switch_MPS */
- nm = qe & 0xFF; qe >>= 8; /* Next_Index_MPS */
+ nl = qe & 0xFF; qe >>= 8; /* Next_Index_LPS + Switch_MPS */
+ nm = qe & 0xFF; qe >>= 8; /* Next_Index_MPS */
/* Decode & estimation procedures per sections D.2.4 & D.2.5 */
temp = e->a - qe;
@@ -193,14 +196,14 @@ arith_decode (j_decompress_ptr cinfo, unsigned char *st)
*/
LOCAL(void)
-process_restart (j_decompress_ptr cinfo)
+process_restart(j_decompress_ptr cinfo)
{
- arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
+ arith_entropy_ptr entropy = (arith_entropy_ptr)cinfo->entropy;
int ci;
jpeg_component_info *compptr;
/* Advance past the RSTn marker */
- if (! (*cinfo->marker->read_restart_marker) (cinfo))
+ if (!(*cinfo->marker->read_restart_marker) (cinfo))
ERREXIT(cinfo, JERR_CANT_SUSPEND);
/* Re-initialize statistics areas */
@@ -244,9 +247,9 @@ process_restart (j_decompress_ptr cinfo)
*/
METHODDEF(boolean)
-decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+decode_mcu_DC_first(j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
- arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
+ arith_entropy_ptr entropy = (arith_entropy_ptr)cinfo->entropy;
JBLOCKROW block;
unsigned char *st;
int blkn, ci, tbl, sign;
@@ -280,7 +283,7 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
/* Figure F.21: Decoding nonzero value v */
/* Figure F.22: Decoding the sign of v */
sign = arith_decode(cinfo, st + 1);
- st += 2; st += sign;
+ st += 2; st += sign;
/* Figure F.23: Decoding the magnitude category of v */
if ((m = arith_decode(cinfo, st)) != 0) {
st = entropy->dc_stats[tbl] + 20; /* Table F.4: X1 = 20 */
@@ -294,9 +297,9 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
}
/* Section F.1.4.4.1.2: Establish dc_context conditioning category */
- if (m < (int) ((1L << cinfo->arith_dc_L[tbl]) >> 1))
+ if (m < (int)((1L << cinfo->arith_dc_L[tbl]) >> 1))
entropy->dc_context[ci] = 0; /* zero diff category */
- else if (m > (int) ((1L << cinfo->arith_dc_U[tbl]) >> 1))
+ else if (m > (int)((1L << cinfo->arith_dc_U[tbl]) >> 1))
entropy->dc_context[ci] = 12 + (sign * 4); /* large diff category */
else
entropy->dc_context[ci] = 4 + (sign * 4); /* small diff category */
@@ -305,12 +308,12 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st += 14;
while (m >>= 1)
if (arith_decode(cinfo, st)) v |= m;
- v += 1; if (sign) v = -v;
- entropy->last_dc_val[ci] += v;
+ v += 1; if (sign) v = -v;
+ entropy->last_dc_val[ci] = (entropy->last_dc_val[ci] + v) & 0xffff;
}
/* Scale and output the DC coefficient (assumes jpeg_natural_order[0]=0) */
- (*block)[0] = (JCOEF) LEFT_SHIFT(entropy->last_dc_val[ci], cinfo->Al);
+ (*block)[0] = (JCOEF)LEFT_SHIFT(entropy->last_dc_val[ci], cinfo->Al);
}
return TRUE;
@@ -323,9 +326,9 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
METHODDEF(boolean)
-decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+decode_mcu_AC_first(j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
- arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
+ arith_entropy_ptr entropy = (arith_entropy_ptr)cinfo->entropy;
JBLOCKROW block;
unsigned char *st;
int tbl, sign, k;
@@ -351,7 +354,7 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st = entropy->ac_stats[tbl] + 3 * (k - 1);
if (arith_decode(cinfo, st)) break; /* EOB flag */
while (arith_decode(cinfo, st + 1) == 0) {
- st += 3; k++;
+ st += 3; k++;
if (k > cinfo->Se) {
WARNMS(cinfo, JWRN_ARITH_BAD_CODE);
entropy->ct = -1; /* spectral overflow */
@@ -383,9 +386,9 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st += 14;
while (m >>= 1)
if (arith_decode(cinfo, st)) v |= m;
- v += 1; if (sign) v = -v;
+ v += 1; if (sign) v = -v;
/* Scale and output coefficient in natural (dezigzagged) order */
- (*block)[jpeg_natural_order[k]] = (JCOEF) ((unsigned)v << cinfo->Al);
+ (*block)[jpeg_natural_order[k]] = (JCOEF)((unsigned)v << cinfo->Al);
}
return TRUE;
@@ -397,9 +400,9 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
METHODDEF(boolean)
-decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+decode_mcu_DC_refine(j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
- arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
+ arith_entropy_ptr entropy = (arith_entropy_ptr)cinfo->entropy;
unsigned char *st;
int p1, blkn;
@@ -430,9 +433,9 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
METHODDEF(boolean)
-decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+decode_mcu_AC_refine(j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
- arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
+ arith_entropy_ptr entropy = (arith_entropy_ptr)cinfo->entropy;
JBLOCKROW block;
JCOEFPTR thiscoef;
unsigned char *st;
@@ -481,7 +484,7 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*thiscoef = p1;
break;
}
- st += 3; k++;
+ st += 3; k++;
if (k > cinfo->Se) {
WARNMS(cinfo, JWRN_ARITH_BAD_CODE);
entropy->ct = -1; /* spectral overflow */
@@ -499,9 +502,9 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
METHODDEF(boolean)
-decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+decode_mcu(j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
- arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
+ arith_entropy_ptr entropy = (arith_entropy_ptr)cinfo->entropy;
jpeg_component_info *compptr;
JBLOCKROW block;
unsigned char *st;
@@ -538,7 +541,7 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
/* Figure F.21: Decoding nonzero value v */
/* Figure F.22: Decoding the sign of v */
sign = arith_decode(cinfo, st + 1);
- st += 2; st += sign;
+ st += 2; st += sign;
/* Figure F.23: Decoding the magnitude category of v */
if ((m = arith_decode(cinfo, st)) != 0) {
st = entropy->dc_stats[tbl] + 20; /* Table F.4: X1 = 20 */
@@ -552,9 +555,9 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
}
/* Section F.1.4.4.1.2: Establish dc_context conditioning category */
- if (m < (int) ((1L << cinfo->arith_dc_L[tbl]) >> 1))
+ if (m < (int)((1L << cinfo->arith_dc_L[tbl]) >> 1))
entropy->dc_context[ci] = 0; /* zero diff category */
- else if (m > (int) ((1L << cinfo->arith_dc_U[tbl]) >> 1))
+ else if (m > (int)((1L << cinfo->arith_dc_U[tbl]) >> 1))
entropy->dc_context[ci] = 12 + (sign * 4); /* large diff category */
else
entropy->dc_context[ci] = 4 + (sign * 4); /* small diff category */
@@ -563,12 +566,12 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st += 14;
while (m >>= 1)
if (arith_decode(cinfo, st)) v |= m;
- v += 1; if (sign) v = -v;
- entropy->last_dc_val[ci] += v;
+ v += 1; if (sign) v = -v;
+ entropy->last_dc_val[ci] = (entropy->last_dc_val[ci] + v) & 0xffff;
}
if (block)
- (*block)[0] = (JCOEF) entropy->last_dc_val[ci];
+ (*block)[0] = (JCOEF)entropy->last_dc_val[ci];
/* Sections F.2.4.2 & F.1.4.4.2: Decoding of AC coefficients */
@@ -579,7 +582,7 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st = entropy->ac_stats[tbl] + 3 * (k - 1);
if (arith_decode(cinfo, st)) break; /* EOB flag */
while (arith_decode(cinfo, st + 1) == 0) {
- st += 3; k++;
+ st += 3; k++;
if (k > DCTSIZE2 - 1) {
WARNMS(cinfo, JWRN_ARITH_BAD_CODE);
entropy->ct = -1; /* spectral overflow */
@@ -611,9 +614,9 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st += 14;
while (m >>= 1)
if (arith_decode(cinfo, st)) v |= m;
- v += 1; if (sign) v = -v;
+ v += 1; if (sign) v = -v;
if (block)
- (*block)[jpeg_natural_order[k]] = (JCOEF) v;
+ (*block)[jpeg_natural_order[k]] = (JCOEF)v;
}
}
@@ -626,9 +629,9 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
METHODDEF(void)
-start_pass (j_decompress_ptr cinfo)
+start_pass(j_decompress_ptr cinfo)
{
- arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
+ arith_entropy_ptr entropy = (arith_entropy_ptr)cinfo->entropy;
int ci, tbl;
jpeg_component_info *compptr;
@@ -647,11 +650,11 @@ start_pass (j_decompress_ptr cinfo)
}
if (cinfo->Ah != 0) {
/* Successive approximation refinement scan: must have Al = Ah-1. */
- if (cinfo->Ah-1 != cinfo->Al)
+ if (cinfo->Ah - 1 != cinfo->Al)
goto bad;
}
if (cinfo->Al > 13) { /* need not check for < 0 */
- bad:
+bad:
ERREXIT4(cinfo, JERR_BAD_PROGRESSION,
cinfo->Ss, cinfo->Se, cinfo->Ah, cinfo->Al);
}
@@ -661,7 +664,7 @@ start_pass (j_decompress_ptr cinfo)
*/
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
int coefi, cindex = cinfo->cur_comp_info[ci]->component_index;
- int *coef_bit_ptr = & cinfo->coef_bits[cindex][0];
+ int *coef_bit_ptr = &cinfo->coef_bits[cindex][0];
if (cinfo->Ss && coef_bit_ptr[0] < 0) /* AC without prior DC scan */
WARNMS2(cinfo, JWRN_BOGUS_PROGRESSION, cindex, 0);
for (coefi = cinfo->Ss; coefi <= cinfo->Se; coefi++) {
@@ -702,8 +705,8 @@ start_pass (j_decompress_ptr cinfo)
if (tbl < 0 || tbl >= NUM_ARITH_TBLS)
ERREXIT1(cinfo, JERR_NO_ARITH_TABLE, tbl);
if (entropy->dc_stats[tbl] == NULL)
- entropy->dc_stats[tbl] = (unsigned char *) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, DC_STAT_BINS);
+ entropy->dc_stats[tbl] = (unsigned char *)(*cinfo->mem->alloc_small)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE, DC_STAT_BINS);
MEMZERO(entropy->dc_stats[tbl], DC_STAT_BINS);
/* Initialize DC predictions to 0 */
entropy->last_dc_val[ci] = 0;
@@ -714,8 +717,8 @@ start_pass (j_decompress_ptr cinfo)
if (tbl < 0 || tbl >= NUM_ARITH_TBLS)
ERREXIT1(cinfo, JERR_NO_ARITH_TABLE, tbl);
if (entropy->ac_stats[tbl] == NULL)
- entropy->ac_stats[tbl] = (unsigned char *) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, AC_STAT_BINS);
+ entropy->ac_stats[tbl] = (unsigned char *)(*cinfo->mem->alloc_small)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE, AC_STAT_BINS);
MEMZERO(entropy->ac_stats[tbl], AC_STAT_BINS);
}
}
@@ -735,15 +738,15 @@ start_pass (j_decompress_ptr cinfo)
*/
GLOBAL(void)
-jinit_arith_decoder (j_decompress_ptr cinfo)
+jinit_arith_decoder(j_decompress_ptr cinfo)
{
arith_entropy_ptr entropy;
int i;
entropy = (arith_entropy_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
sizeof(arith_entropy_decoder));
- cinfo->entropy = (struct jpeg_entropy_decoder *) entropy;
+ cinfo->entropy = (struct jpeg_entropy_decoder *)entropy;
entropy->pub.start_pass = start_pass;
/* Mark tables unallocated */
@@ -759,9 +762,10 @@ jinit_arith_decoder (j_decompress_ptr cinfo)
/* Create progression status table */
int *coef_bit_ptr, ci;
cinfo->coef_bits = (int (*)[DCTSIZE2])
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- cinfo->num_components*DCTSIZE2*sizeof(int));
- coef_bit_ptr = & cinfo->coef_bits[0][0];
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ cinfo->num_components * DCTSIZE2 *
+ sizeof(int));
+ coef_bit_ptr = &cinfo->coef_bits[0][0];
for (ci = 0; ci < cinfo->num_components; ci++)
for (i = 0; i < DCTSIZE2; i++)
*coef_bit_ptr++ = -1;
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-01 09:35:53 +0000