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Removed unnecessary fseeks from T.42, and change tried a test with different 

default T.42 illuminant, to see if the colours suit screens better.
This commit is contained in:
Steve Underwood 2013-08-17 03:42:04 +08:00
parent d4d2d988a3
commit 6daf132081
1 changed files with 2 additions and 14 deletions
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16
libs/spandsp/src/t42.c
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@ -949,6 +949,7 @@ SPAN_DECLARE(int) t42_encode_restart(t42_encode_state_t *s, uint32_t image_width
/* ITULAB */ /* ITULAB */
/* Illuminant D50 */ /* Illuminant D50 */
set_lab_illuminant(&s->lab, 96.422f, 100.000f, 82.521f); set_lab_illuminant(&s->lab, 96.422f, 100.000f, 82.521f);
set_lab_illuminant(&s->lab, 95.047f, 100.000f, 108.883f);
set_lab_gamut(&s->lab, 0, 100, -85, 85, -75, 125, false); set_lab_gamut(&s->lab, 0, 100, -85, 85, -75, 125, false);
} }
s->compressed_image_size = 0; s->compressed_image_size = 0;
@ -965,12 +966,6 @@ SPAN_DECLARE(int) t42_encode_restart(t42_encode_state_t *s, uint32_t image_width
span_log(&s->logging, SPAN_LOG_FLOW, "Failed to open_memstream().\n"); span_log(&s->logging, SPAN_LOG_FLOW, "Failed to open_memstream().\n");
return -1; return -1;
} }
if (fseek(s->out, 0, SEEK_SET) != 0)
{
fclose(s->out);
s->out = NULL;
return -1;
}
#else #else
if ((s->out = tmpfile()) == NULL) if ((s->out = tmpfile()) == NULL)
{ {
@ -1114,14 +1109,6 @@ static int t42_itulab_jpeg_to_srgb(t42_decode_state_t *s)
for (i = 0; i < 16; i++) for (i = 0; i < 16; i++)
jpeg_save_markers(&s->decompressor, JPEG_APP0 + i, 0xFFFF); jpeg_save_markers(&s->decompressor, JPEG_APP0 + i, 0xFFFF);
/* Rewind the file */
if (fseek(s->in, 0, SEEK_SET) != 0)
{
fclose(s->in);
s->in = NULL;
return -1;
}
/* Take the header */ /* Take the header */
jpeg_read_header(&s->decompressor, false); jpeg_read_header(&s->decompressor, false);
/* Sanity check and parameter check */ /* Sanity check and parameter check */
@ -1328,6 +1315,7 @@ SPAN_DECLARE(int) t42_decode_restart(t42_decode_state_t *s)
/* ITULAB */ /* ITULAB */
/* Illuminant D50 */ /* Illuminant D50 */
set_lab_illuminant(&s->lab, 96.422f, 100.000f, 82.521f); set_lab_illuminant(&s->lab, 96.422f, 100.000f, 82.521f);
set_lab_illuminant(&s->lab, 95.047f, 100.000f, 108.883f);
set_lab_gamut(&s->lab, 0, 100, -85, 85, -75, 125, false); set_lab_gamut(&s->lab, 0, 100, -85, 85, -75, 125, false);
} }