fe0e3c7e88
* commit '10ba6ed3365615ed5c2995fe2d240cb2d5000173': (32 commits) Travis: Install MacPorts without using macports-ci Build: Set FLOATTEST more intelligently BUILDING.md: Use min. iOS v8 in iOS Armv8 example Fix build if WITH_12BIT==1 && WITH_JPEG(7|8)==1 Travis: Combine PPC/Arm tests with jpeg-7/8 tests Build: Fix test failures w/ Arm Neon SIMD exts Travis: Regression-test Armv8 and PPC SIMD exts Demote "fast" [I]DCT algorithms to legacy status jpegtran.c: "subarea" = "region" jpegtran.1: Minor formatting tweak transupp.c: Code formatting tweaks cdjpeg.h: Remove unused function stub Consistify formatting to simplify checkstyle README.ijg: Update URLs; remove Usenet info jversion.h: Update copyrights Build: Improve Arm 32-bit cross-comp./packaging "ARM"="Arm", "NEON"="Neon" Build: Fix permissions ChangeLog: Fix minor formatting issue ChangeLog.md: jpeg_crop_scanline(), not scanlines ...
83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/*
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* jcinit.c
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*
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* This file was part of the Independent JPEG Group's software:
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* Copyright (C) 1991-1997, Thomas G. Lane.
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* libjpeg-turbo Modifications:
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* Copyright (C) 2020, D. R. Commander.
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* mozjpeg Modifications:
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* Copyright (C) 2014, Mozilla Corporation.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains initialization logic for the JPEG compressor.
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* This routine is in charge of selecting the modules to be executed and
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* making an initialization call to each one.
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*
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* Logically, this code belongs in jcmaster.c. It's split out because
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* linking this routine implies linking the entire compression library.
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* For a transcoding-only application, we want to be able to use jcmaster.c
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* without linking in the whole library.
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*/
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#define JPEG_INTERNALS
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#include "jinclude.h"
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#include "jpeglib.h"
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#include "jpegcomp.h"
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/*
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* Master selection of compression modules.
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* This is done once at the start of processing an image. We determine
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* which modules will be used and give them appropriate initialization calls.
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*/
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GLOBAL(void)
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jinit_compress_master (j_compress_ptr cinfo)
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{
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/* Initialize master control (includes parameter checking/processing) */
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jinit_c_master_control(cinfo, FALSE /* full compression */);
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/* Preprocessing */
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if (! cinfo->raw_data_in) {
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jinit_color_converter(cinfo);
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jinit_downsampler(cinfo);
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jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
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}
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/* Forward DCT */
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jinit_forward_dct(cinfo);
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/* Entropy encoding: either Huffman or arithmetic coding. */
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if (cinfo->arith_code) {
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#ifdef C_ARITH_CODING_SUPPORTED
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jinit_arith_encoder(cinfo);
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#else
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ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
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#endif
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} else {
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if (cinfo->progressive_mode) {
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#ifdef C_PROGRESSIVE_SUPPORTED
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jinit_phuff_encoder(cinfo);
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#else
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ERREXIT(cinfo, JERR_NOT_COMPILED);
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#endif
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} else
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jinit_huff_encoder(cinfo);
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}
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/* Need a full-image coefficient buffer in any multi-pass mode. */
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jinit_c_coef_controller(cinfo,
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(boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding ||
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cinfo->master->optimize_scans || cinfo->master->trellis_quant));
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jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
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jinit_marker_writer(cinfo);
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/* We can now tell the memory manager to allocate virtual arrays. */
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(*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
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/* Write the datastream header (SOI) immediately.
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* Frame and scan headers are postponed till later.
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* This lets application insert special markers after the SOI.
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*/
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(*cinfo->marker->write_file_header) (cinfo);
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}
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