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The Independent JPEG Group's JPEG software v5b

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This commit is contained in:
Thomas G. Lane
1995-03-15 00:00:00 +00:00
committed by DRC
parent 9ba2f5ed36
commit a8b67c4fbb
28 changed files with 628 additions and 411 deletions
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18
jdapi.c
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@@ -1,7 +1,7 @@
/*
* jdapi.c
*
* Copyright (C) 1994, Thomas G. Lane.
* Copyright (C) 1994-1995, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@@ -345,14 +345,14 @@ jpeg_read_scanlines (j_decompress_ptr cinfo, JSAMPARRAY scanlines,
/*
* Alternate entry point to read raw data.
* Processes exactly one MCU row per call.
* Processes exactly one iMCU row per call, unless suspended.
*/
GLOBAL JDIMENSION
jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
JDIMENSION max_lines)
{
JDIMENSION lines_per_MCU_row;
JDIMENSION lines_per_iMCU_row;
if (cinfo->global_state != DSTATE_RAW_OK)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
@@ -368,18 +368,18 @@ jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
}
/* Verify that at least one MCU row can be returned. */
lines_per_MCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size;
if (max_lines < lines_per_MCU_row)
/* Verify that at least one iMCU row can be returned. */
lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size;
if (max_lines < lines_per_iMCU_row)
ERREXIT(cinfo, JERR_BUFFER_SIZE);
/* Decompress directly into user's buffer. */
if (! (*cinfo->coef->decompress_data) (cinfo, data))
return 0; /* suspension forced, can do nothing more */
/* OK, we processed one MCU row. */
cinfo->output_scanline += lines_per_MCU_row;
return lines_per_MCU_row;
/* OK, we processed one iMCU row. */
cinfo->output_scanline += lines_per_iMCU_row;
return lines_per_iMCU_row;
}