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Upgrade libjpeg 8c -> 9e

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This commit is contained in:
Martin Natano
2022-05-30 23:57:33 +02:00
parent e2ee97e36d
commit 06154a0094
187 changed files with 71861 additions and 3686 deletions
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extern/libjpeg/jdhuff.c
Vendored
+103 -85
View File
@@ -2,7 +2,7 @@
* jdhuff.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2006-2009 by Guido Vollbeding.
* Modified 2006-2020 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@@ -341,13 +341,12 @@ jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, boolean isDC, int tblno,
htbl =
isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
if (htbl == NULL)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
htbl = jpeg_std_huff_table((j_common_ptr) cinfo, isDC, tblno);
/* Allocate a workspace if we haven't already done so. */
if (*pdtbl == NULL)
*pdtbl = (d_derived_tbl *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(d_derived_tbl));
*pdtbl = (d_derived_tbl *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(d_derived_tbl));
dtbl = *pdtbl;
dtbl->pub = htbl; /* fill in back link */
@@ -627,6 +626,22 @@ jpeg_huff_decode (bitread_working_state * state,
}
/*
* Finish up at the end of a Huffman-compressed scan.
*/
METHODDEF(void)
finish_pass_huff (j_decompress_ptr cinfo)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
/* Throw away any unused bits remaining in bit buffer; */
/* include any full bytes in next_marker's count of discarded bytes */
cinfo->marker->discarded_bytes += entropy->bitstate.bits_left / 8;
entropy->bitstate.bits_left = 0;
}
/*
* Check for a restart marker & resynchronize decoder.
* Returns FALSE if must suspend.
@@ -638,10 +653,7 @@ process_restart (j_decompress_ptr cinfo)
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int ci;
/* Throw away any unused bits remaining in bit buffer; */
/* include any full bytes in next_marker's count of discarded bytes */
cinfo->marker->discarded_bytes += entropy->bitstate.bits_left / 8;
entropy->bitstate.bits_left = 0;
finish_pass_huff(cinfo);
/* Advance past the RSTn marker */
if (! (*cinfo->marker->read_restart_marker) (cinfo))
@@ -692,8 +704,8 @@ 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, JBLOCKARRAY MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int Al = cinfo->Al;
register int s, r;
@@ -717,7 +729,7 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
if (! entropy->insufficient_data) {
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(state, entropy->saved);
/* Outer loop handles each block in the MCU */
@@ -746,12 +758,13 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(entropy->saved, state);
}
/* Account for restart interval (no-op if not using restarts) */
entropy->restarts_to_go--;
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
}
@@ -763,8 +776,8 @@ 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, JBLOCKARRAY MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
register int s, k, r;
unsigned int EOBRUN;
@@ -786,10 +799,6 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
if (! entropy->insufficient_data) {
Se = cinfo->Se;
Al = cinfo->Al;
natural_order = cinfo->natural_order;
/* Load up working state.
* We can avoid loading/saving bitread state if in an EOB run.
*/
@@ -797,10 +806,13 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
/* There is always only one block per MCU */
if (EOBRUN > 0) /* if it's a band of zeroes... */
if (EOBRUN) /* if it's a band of zeroes... */
EOBRUN--; /* ...process it now (we do nothing) */
else {
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
Se = cinfo->Se;
Al = cinfo->Al;
natural_order = cinfo->natural_order;
block = MCU_data[0];
tbl = entropy->ac_derived_tbl;
@@ -816,30 +828,30 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
/* Scale and output coefficient in natural (dezigzagged) order */
(*block)[natural_order[k]] = (JCOEF) (s << Al);
} else {
if (r == 15) { /* ZRL */
k += 15; /* skip 15 zeroes in band */
} else { /* EOBr, run length is 2^r + appended bits */
EOBRUN = 1 << r;
if (r != 15) { /* EOBr, run length is 2^r + appended bits */
if (r) { /* EOBr, r > 0 */
EOBRUN = 1 << r;
CHECK_BIT_BUFFER(br_state, r, return FALSE);
r = GET_BITS(r);
EOBRUN += r;
EOBRUN--; /* this band is processed at this moment */
}
EOBRUN--; /* this band is processed at this moment */
break; /* force end-of-band */
}
k += 15; /* ZRL: skip 15 zeroes in band */
}
}
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
}
/* Completed MCU, so update state */
entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we need */
}
/* Account for restart interval (no-op if not using restarts) */
entropy->restarts_to_go--;
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
}
@@ -847,17 +859,16 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
/*
* MCU decoding for DC successive approximation refinement scan.
* Note: we assume such scans can be multi-component, although the spec
* is not very clear on the point.
* Note: we assume such scans can be multi-component,
* although the spec is not very clear on the point.
*/
METHODDEF(boolean)
decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKARRAY MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int p1 = 1 << cinfo->Al; /* 1 in the bit position being coded */
JCOEF p1;
int blkn;
JBLOCKROW block;
BITREAD_STATE_VARS;
/* Process restart marker if needed; may have to suspend */
@@ -872,25 +883,26 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
p1 = 1 << cinfo->Al; /* 1 in the bit position being coded */
/* Outer loop handles each block in the MCU */
for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
block = MCU_data[blkn];
/* Encoded data is simply the next bit of the two's-complement DC value */
CHECK_BIT_BUFFER(br_state, 1, return FALSE);
if (GET_BITS(1))
(*block)[0] |= p1;
MCU_data[blkn][0][0] |= p1;
/* Note: since we use |=, repeating the assignment later is safe */
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
/* Account for restart interval (no-op if not using restarts) */
entropy->restarts_to_go--;
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
}
@@ -901,12 +913,13 @@ 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, JBLOCKARRAY MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
register int s, k, r;
unsigned int EOBRUN;
int Se, p1, m1;
int Se;
JCOEF p1, m1;
const int * natural_order;
JBLOCKROW block;
JCOEFPTR thiscoef;
@@ -928,11 +941,11 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
Se = cinfo->Se;
p1 = 1 << cinfo->Al; /* 1 in the bit position being coded */
m1 = (-1) << cinfo->Al; /* -1 in the bit position being coded */
m1 = -p1; /* -1 in the bit position being coded */
natural_order = cinfo->natural_order;
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we need */
/* There is always only one block per MCU */
@@ -951,7 +964,7 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
k = cinfo->Ss;
if (EOBRUN == 0) {
for (; k <= Se; k++) {
do {
HUFF_DECODE(s, br_state, tbl, goto undoit, label3);
r = s >> 4;
s &= 15;
@@ -981,7 +994,7 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
do {
thiscoef = *block + natural_order[k];
if (*thiscoef != 0) {
if (*thiscoef) {
CHECK_BIT_BUFFER(br_state, 1, goto undoit);
if (GET_BITS(1)) {
if ((*thiscoef & p1) == 0) { /* do nothing if already set it */
@@ -1004,18 +1017,19 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
/* Remember its position in case we have to suspend */
newnz_pos[num_newnz++] = pos;
}
}
k++;
} while (k <= Se);
}
if (EOBRUN > 0) {
if (EOBRUN) {
/* Scan any remaining coefficient positions after the end-of-band
* (the last newly nonzero coefficient, if any). Append a correction
* bit to each already-nonzero coefficient. A correction bit is 1
* if the absolute value of the coefficient must be increased.
*/
for (; k <= Se; k++) {
do {
thiscoef = *block + natural_order[k];
if (*thiscoef != 0) {
if (*thiscoef) {
CHECK_BIT_BUFFER(br_state, 1, goto undoit);
if (GET_BITS(1)) {
if ((*thiscoef & p1) == 0) { /* do nothing if already changed it */
@@ -1026,24 +1040,26 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
}
}
}
k++;
} while (k <= Se);
/* Count one block completed in EOB run */
EOBRUN--;
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we need */
}
/* Account for restart interval (no-op if not using restarts) */
entropy->restarts_to_go--;
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
undoit:
/* Re-zero any output coefficients that we made newly nonzero */
while (num_newnz > 0)
while (num_newnz)
(*block)[newnz_pos[--num_newnz]] = 0;
return FALSE;
@@ -1056,7 +1072,7 @@ undoit:
*/
METHODDEF(boolean)
decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKARRAY MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
const int * natural_order;
@@ -1080,7 +1096,7 @@ decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
Se = cinfo->lim_Se;
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(state, entropy->saved);
/* Outer loop handles each block in the MCU */
@@ -1167,12 +1183,13 @@ decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(entropy->saved, state);
}
/* Account for restart interval (no-op if not using restarts) */
entropy->restarts_to_go--;
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
}
@@ -1184,7 +1201,7 @@ decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
METHODDEF(boolean)
decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
decode_mcu (j_decompress_ptr cinfo, JBLOCKARRAY MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int blkn;
@@ -1204,7 +1221,7 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
if (! entropy->insufficient_data) {
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(state, entropy->saved);
/* Outer loop handles each block in the MCU */
@@ -1291,12 +1308,13 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(entropy->saved, state);
}
/* Account for restart interval (no-op if not using restarts) */
entropy->restarts_to_go--;
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
}
@@ -1332,11 +1350,11 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
goto bad;
}
if (cinfo->Al > 13) { /* need not check for < 0 */
/* Arguably the maximum Al value should be less than 13 for 8-bit precision,
* but the spec doesn't say so, and we try to be liberal about what we
* accept. Note: large Al values could result in out-of-range DC
* coefficients during early scans, leading to bizarre displays due to
* overflows in the IDCT math. But we won't crash.
/* Arguably the maximum Al value should be less than 13 for 8-bit
* precision, but the spec doesn't say so, and we try to be liberal
* about what we accept. Note: large Al values could result in
* out-of-range DC coefficients during early scans, leading to bizarre
* displays due to overflows in the IDCT math. But we won't crash.
*/
bad:
ERREXIT4(cinfo, JERR_BAD_PROGRESSION,
@@ -1440,7 +1458,8 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
compptr = cinfo->cur_comp_info[ci];
/* Precalculate which table to use for each block */
entropy->dc_cur_tbls[blkn] = entropy->dc_derived_tbls[compptr->dc_tbl_no];
entropy->ac_cur_tbls[blkn] = entropy->ac_derived_tbls[compptr->ac_tbl_no];
entropy->ac_cur_tbls[blkn] = /* AC needs no table when not present */
cinfo->lim_Se ? entropy->ac_derived_tbls[compptr->ac_tbl_no] : NULL;
/* Decide whether we really care about the coefficient values */
if (compptr->component_needed) {
ci = compptr->DCT_v_scaled_size;
@@ -1483,7 +1502,6 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
if (ci <= 0 || ci > 8) ci = 8;
if (i <= 0 || i > 8) i = 8;
entropy->coef_limit[blkn] = 1 + jpeg_zigzag_order[ci - 1][i - 1];
break;
}
} else {
entropy->coef_limit[blkn] = 0;
@@ -1511,18 +1529,18 @@ jinit_huff_decoder (j_decompress_ptr cinfo)
huff_entropy_ptr entropy;
int i;
entropy = (huff_entropy_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(huff_entropy_decoder));
cinfo->entropy = (struct jpeg_entropy_decoder *) entropy;
entropy = (huff_entropy_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(huff_entropy_decoder));
cinfo->entropy = &entropy->pub;
entropy->pub.start_pass = start_pass_huff_decoder;
entropy->pub.finish_pass = finish_pass_huff;
if (cinfo->progressive_mode) {
/* 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));
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];
for (ci = 0; ci < cinfo->num_components; ci++)
for (i = 0; i < DCTSIZE2; i++)
@@ -1533,7 +1551,7 @@ jinit_huff_decoder (j_decompress_ptr cinfo)
entropy->derived_tbls[i] = NULL;
}
} else {
/* Mark tables unallocated */
/* Mark derived tables unallocated */
for (i = 0; i < NUM_HUFF_TBLS; i++) {
entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL;
}