diff options
Diffstat (limited to 'src/3rdparty/libjpeg/src/jdphuff.c')
| -rw-r--r-- | src/3rdparty/libjpeg/src/jdphuff.c | 48 |
1 files changed, 20 insertions, 28 deletions
diff --git a/src/3rdparty/libjpeg/src/jdphuff.c b/src/3rdparty/libjpeg/src/jdphuff.c index 9e82636bbd..c6d82ca14b 100644 --- a/src/3rdparty/libjpeg/src/jdphuff.c +++ b/src/3rdparty/libjpeg/src/jdphuff.c @@ -4,7 +4,7 @@ * This file was part of the Independent JPEG Group's software: * Copyright (C) 1995-1997, Thomas G. Lane. * libjpeg-turbo Modifications: - * Copyright (C) 2015-2016, 2018, D. R. Commander. + * Copyright (C) 2015-2016, 2018-2021, D. R. Commander. * For conditions of distribution and use, see the accompanying README.ijg * file. * @@ -41,25 +41,6 @@ typedef struct { int last_dc_val[MAX_COMPS_IN_SCAN]; /* last DC coef for each component */ } savable_state; -/* This macro is to work around compilers with missing or broken - * structure assignment. You'll need to fix this code if you have - * such a compiler and you change MAX_COMPS_IN_SCAN. - */ - -#ifndef NO_STRUCT_ASSIGN -#define ASSIGN_STATE(dest, src) ((dest) = (src)) -#else -#if MAX_COMPS_IN_SCAN == 4 -#define ASSIGN_STATE(dest, src) \ - ((dest).EOBRUN = (src).EOBRUN, \ - (dest).last_dc_val[0] = (src).last_dc_val[0], \ - (dest).last_dc_val[1] = (src).last_dc_val[1], \ - (dest).last_dc_val[2] = (src).last_dc_val[2], \ - (dest).last_dc_val[3] = (src).last_dc_val[3]) -#endif -#endif - - typedef struct { struct jpeg_entropy_decoder pub; /* public fields */ @@ -102,7 +83,7 @@ start_pass_phuff_decoder(j_decompress_ptr cinfo) boolean is_DC_band, bad; int ci, coefi, tbl; d_derived_tbl **pdtbl; - int *coef_bit_ptr; + int *coef_bit_ptr, *prev_coef_bit_ptr; jpeg_component_info *compptr; is_DC_band = (cinfo->Ss == 0); @@ -143,8 +124,15 @@ start_pass_phuff_decoder(j_decompress_ptr cinfo) for (ci = 0; ci < cinfo->comps_in_scan; ci++) { int cindex = cinfo->cur_comp_info[ci]->component_index; coef_bit_ptr = &cinfo->coef_bits[cindex][0]; + prev_coef_bit_ptr = &cinfo->coef_bits[cindex + cinfo->num_components][0]; if (!is_DC_band && coef_bit_ptr[0] < 0) /* AC without prior DC scan */ WARNMS2(cinfo, JWRN_BOGUS_PROGRESSION, cindex, 0); + for (coefi = MIN(cinfo->Ss, 1); coefi <= MAX(cinfo->Se, 9); coefi++) { + if (cinfo->input_scan_number > 1) + prev_coef_bit_ptr[coefi] = coef_bit_ptr[coefi]; + else + prev_coef_bit_ptr[coefi] = 0; + } for (coefi = cinfo->Ss; coefi <= cinfo->Se; coefi++) { int expected = (coef_bit_ptr[coefi] < 0) ? 0 : coef_bit_ptr[coefi]; if (cinfo->Ah != expected) @@ -323,7 +311,7 @@ decode_mcu_DC_first(j_decompress_ptr cinfo, JBLOCKROW *MCU_data) /* Load up working state */ BITREAD_LOAD_STATE(cinfo, entropy->bitstate); - ASSIGN_STATE(state, entropy->saved); + state = entropy->saved; /* Outer loop handles each block in the MCU */ @@ -356,11 +344,12 @@ decode_mcu_DC_first(j_decompress_ptr cinfo, JBLOCKROW *MCU_data) /* Completed MCU, so update state */ BITREAD_SAVE_STATE(cinfo, entropy->bitstate); - ASSIGN_STATE(entropy->saved, state); + entropy->saved = state; } /* Account for restart interval (no-op if not using restarts) */ - entropy->restarts_to_go--; + if (cinfo->restart_interval) + entropy->restarts_to_go--; return TRUE; } @@ -444,7 +433,8 @@ decode_mcu_AC_first(j_decompress_ptr cinfo, JBLOCKROW *MCU_data) } /* Account for restart interval (no-op if not using restarts) */ - entropy->restarts_to_go--; + if (cinfo->restart_interval) + entropy->restarts_to_go--; return TRUE; } @@ -495,7 +485,8 @@ decode_mcu_DC_refine(j_decompress_ptr cinfo, JBLOCKROW *MCU_data) BITREAD_SAVE_STATE(cinfo, entropy->bitstate); /* Account for restart interval (no-op if not using restarts) */ - entropy->restarts_to_go--; + if (cinfo->restart_interval) + entropy->restarts_to_go--; return TRUE; } @@ -638,7 +629,8 @@ decode_mcu_AC_refine(j_decompress_ptr cinfo, JBLOCKROW *MCU_data) } /* Account for restart interval (no-op if not using restarts) */ - entropy->restarts_to_go--; + if (cinfo->restart_interval) + entropy->restarts_to_go--; return TRUE; @@ -676,7 +668,7 @@ jinit_phuff_decoder(j_decompress_ptr cinfo) /* Create progression status table */ cinfo->coef_bits = (int (*)[DCTSIZE2]) (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE, - cinfo->num_components * DCTSIZE2 * + cinfo->num_components * 2 * DCTSIZE2 * sizeof(int)); coef_bit_ptr = &cinfo->coef_bits[0][0]; for (ci = 0; ci < cinfo->num_components; ci++) |