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Lossless: Fix innocuous UBSan warnings

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This commit is contained in:
DRC 2022-11-17 11:31:29 -06:00
parent 07129256e0
commit db9dd93da4
3 changed files with 8 additions and 4 deletions
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3
jclossls.c
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@ -256,8 +256,9 @@ METHODDEF(void)
simple_downscale(j_compress_ptr cinfo,
_JSAMPROW input_buf, _JSAMPROW output_buf, JDIMENSION width)
{
while (width--)
do {
*output_buf++ = (_JSAMPLE)RIGHT_SHIFT(*input_buf++, cinfo->Al);
} while (--width);
}

3
jddiffct.c
View File

@ -196,7 +196,8 @@ decompress_data(j_decompress_ptr cinfo, _JSAMPIMAGE output_buf)
}
/* Account for restart interval (no-op if not using restarts) */
diff->restart_rows_to_go--;
if (cinfo->restart_interval)
diff->restart_rows_to_go--;
/* Completed an MCU row, but perhaps not an iMCU row */
diff->MCU_ctr = 0;

6
jdlossls.c
View File

@ -216,16 +216,18 @@ METHODDEF(void)
simple_upscale(j_decompress_ptr cinfo,
JDIFFROW diff_buf, _JSAMPROW output_buf, JDIMENSION width)
{
while (width--)
do {
*output_buf++ = (_JSAMPLE)(*diff_buf++ << cinfo->Al);
} while (--width);
}
METHODDEF(void)
noscale(j_decompress_ptr cinfo,
JDIFFROW diff_buf, _JSAMPROW output_buf, JDIMENSION width)
{
while (width--)
do {
*output_buf++ = (_JSAMPLE)(*diff_buf++);
} while (--width);
}