Coverage Report

Created: 2023-06-07 06:03

/src/libjpeg-turbo.main/jcinit.c
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/*
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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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 * Lossless JPEG Modifications:
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 * Copyright (C) 1999, Ken Murchison.
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 * libjpeg-turbo Modifications:
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 * Copyright (C) 2020, 2022, D. R. Commander.
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 * For conditions of distribution and use, see the accompanying README.ijg
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 * 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 "jpegapicomp.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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0
    if (cinfo->data_precision == 16) {
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0
#ifdef C_LOSSLESS_SUPPORTED
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0
      j16init_color_converter(cinfo);
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      j16init_downsampler(cinfo);
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      j16init_c_prep_controller(cinfo,
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                                FALSE /* never need full buffer here */);
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#else
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      ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
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#endif
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0
    } else if (cinfo->data_precision == 12) {
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0
      j12init_color_converter(cinfo);
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      j12init_downsampler(cinfo);
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      j12init_c_prep_controller(cinfo,
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0
                                FALSE /* never need full buffer here */);
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0
    } else {
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0
      jinit_color_converter(cinfo);
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      jinit_downsampler(cinfo);
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0
      jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
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0
    }
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  }
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  if (cinfo->master->lossless) {
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0
#ifdef C_LOSSLESS_SUPPORTED
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    /* Prediction, sample differencing, and point transform */
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    if (cinfo->data_precision == 16)
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      j16init_lossless_compressor(cinfo);
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0
    else if (cinfo->data_precision == 12)
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      j12init_lossless_compressor(cinfo);
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0
    else
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      jinit_lossless_compressor(cinfo);
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    /* Entropy encoding: either Huffman or arithmetic coding. */
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0
    if (cinfo->arith_code) {
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0
      ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
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0
    } else {
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      jinit_lhuff_encoder(cinfo);
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    }
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    /* Need a full-image difference buffer in any multi-pass mode. */
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0
    if (cinfo->data_precision == 16)
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0
      j16init_c_diff_controller(cinfo, (boolean)(cinfo->num_scans > 1 ||
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0
                                                 cinfo->optimize_coding));
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0
    else if (cinfo->data_precision == 12)
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      j12init_c_diff_controller(cinfo, (boolean)(cinfo->num_scans > 1 ||
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0
                                                 cinfo->optimize_coding));
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0
    else
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      jinit_c_diff_controller(cinfo, (boolean)(cinfo->num_scans > 1 ||
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0
                                               cinfo->optimize_coding));
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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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    if (cinfo->data_precision == 16)
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0
      ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
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    /* Forward DCT */
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    if (cinfo->data_precision == 12)
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      j12init_forward_dct(cinfo);
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    else
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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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    if (cinfo->data_precision == 12)
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0
      j12init_c_coef_controller(cinfo, (boolean)(cinfo->num_scans > 1 ||
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0
                                                 cinfo->optimize_coding));
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    else
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      jinit_c_coef_controller(cinfo, (boolean)(cinfo->num_scans > 1 ||
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                                               cinfo->optimize_coding));
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  }
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  if (cinfo->data_precision == 16)
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0
#ifdef C_LOSSLESS_SUPPORTED
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0
    j16init_c_main_controller(cinfo, FALSE /* never need full buffer here */);
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#else
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    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
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#endif
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  else if (cinfo->data_precision == 12)
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    j12init_c_main_controller(cinfo, FALSE /* never need full buffer here */);
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  else
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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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}