diff options
Diffstat (limited to '3rdparty/libjpeg/jdhuff.c')
-rw-r--r-- | 3rdparty/libjpeg/jdhuff.c | 125 |
1 files changed, 65 insertions, 60 deletions
diff --git a/3rdparty/libjpeg/jdhuff.c b/3rdparty/libjpeg/jdhuff.c index 6920e207c8e..f175f0c3239 100644 --- a/3rdparty/libjpeg/jdhuff.c +++ b/3rdparty/libjpeg/jdhuff.c @@ -2,7 +2,7 @@ * jdhuff.c * * Copyright (C) 1991-1997, Thomas G. Lane. - * Modified 2006-2013 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 */ @@ -705,8 +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; @@ -730,7 +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 */ @@ -759,12 +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; } @@ -776,8 +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; @@ -799,10 +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. */ @@ -813,7 +809,10 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data) 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; @@ -843,15 +842,16 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data) } } - 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; } @@ -864,10 +864,11 @@ 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, JBLOCKARRAY MCU_data) +{ huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy; - int p1, blkn; + JCOEF p1; + int blkn; BITREAD_STATE_VARS; /* Process restart marker if needed; may have to suspend */ @@ -882,7 +883,7 @@ 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 */ @@ -897,10 +898,11 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data) } /* 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; } @@ -911,12 +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; @@ -938,11 +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 */ @@ -1044,12 +1047,13 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data) } /* 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; @@ -1068,7 +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; @@ -1092,7 +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 */ @@ -1179,12 +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; } @@ -1196,7 +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; @@ -1216,7 +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 */ @@ -1303,12 +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; } @@ -1344,11 +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, @@ -1452,7 +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; @@ -1495,7 +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; @@ -1523,9 +1529,8 @@ 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)); + 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; @@ -1533,9 +1538,9 @@ jinit_huff_decoder (j_decompress_ptr cinfo) 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++) @@ -1546,7 +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; } |