Coverage Report

Created: 2024-08-17 06:42

/src/libjpeg-turbo.main/jdcoefct.h
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/*
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 * jdcoefct.h
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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) 1994-1997, Thomas G. Lane.
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 * libjpeg-turbo Modifications:
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 * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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 * Copyright (C) 2020, Google, Inc.
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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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#define JPEG_INTERNALS
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#include "jpeglib.h"
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/* Block smoothing is only applicable for progressive JPEG, so: */
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#ifndef D_PROGRESSIVE_SUPPORTED
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#undef BLOCK_SMOOTHING_SUPPORTED
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#endif
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/* Private buffer controller object */
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typedef struct {
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  struct jpeg_d_coef_controller pub; /* public fields */
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  /* These variables keep track of the current location of the input side. */
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  /* cinfo->input_iMCU_row is also used for this. */
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  JDIMENSION MCU_ctr;           /* counts MCUs processed in current row */
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  int MCU_vert_offset;          /* counts MCU rows within iMCU row */
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  int MCU_rows_per_iMCU_row;    /* number of such rows needed */
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  /* The output side's location is represented by cinfo->output_iMCU_row. */
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  /* In single-pass modes, it's sufficient to buffer just one MCU.
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   * We allocate a workspace of D_MAX_BLOCKS_IN_MCU coefficient blocks,
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   * and let the entropy decoder write into that workspace each time.
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   * In multi-pass modes, this array points to the current MCU's blocks
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   * within the virtual arrays; it is used only by the input side.
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   */
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  JBLOCKROW MCU_buffer[D_MAX_BLOCKS_IN_MCU];
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  /* Temporary workspace for one MCU */
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  JCOEF *workspace;
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#ifdef D_MULTISCAN_FILES_SUPPORTED
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  /* In multi-pass modes, we need a virtual block array for each component. */
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  jvirt_barray_ptr whole_image[MAX_COMPONENTS];
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#endif
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#ifdef BLOCK_SMOOTHING_SUPPORTED
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  /* When doing block smoothing, we latch coefficient Al values here */
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  int *coef_bits_latch;
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#define SAVED_COEFS  10         /* we save coef_bits[0..9] */
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#endif
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} my_coef_controller;
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typedef my_coef_controller *my_coef_ptr;
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LOCAL(void)
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start_iMCU_row(j_decompress_ptr cinfo)
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/* Reset within-iMCU-row counters for a new row (input side) */
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{
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  my_coef_ptr coef = (my_coef_ptr)cinfo->coef;
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  /* In an interleaved scan, an MCU row is the same as an iMCU row.
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   * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
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   * But at the bottom of the image, process only what's left.
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   */
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  if (cinfo->comps_in_scan > 1) {
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    coef->MCU_rows_per_iMCU_row = 1;
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  } else {
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    if (cinfo->input_iMCU_row < (cinfo->total_iMCU_rows - 1))
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2.86M
      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
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    else
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      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
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  }
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  coef->MCU_ctr = 0;
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  coef->MCU_vert_offset = 0;
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}
Unexecuted instantiation: jdapistd.c:start_iMCU_row
jdcoefct.c:start_iMCU_row
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3.75M
{
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3.75M
  my_coef_ptr coef = (my_coef_ptr)cinfo->coef;
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  /* In an interleaved scan, an MCU row is the same as an iMCU row.
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   * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
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   * But at the bottom of the image, process only what's left.
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   */
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3.75M
  if (cinfo->comps_in_scan > 1) {
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    coef->MCU_rows_per_iMCU_row = 1;
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3.09M
  } else {
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    if (cinfo->input_iMCU_row < (cinfo->total_iMCU_rows - 1))
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      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
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    else
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      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
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  }
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  coef->MCU_ctr = 0;
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  coef->MCU_vert_offset = 0;
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}