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Be strict with the component sampling factors

This commit is contained in:
Philip Heron 2011-06-24 21:00:05 +01:00
parent be051b1ae2
commit ad3f14c3c0
1 changed files with 12 additions and 0 deletions
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12
ssdv.c
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@ -549,6 +549,18 @@ static char ssdv_have_marker_data(ssdv_t *s)
}
fprintf(stderr, "DQT table for component %i: %02X, Sampling factor: %ix%i\n", dq[0], dq[2], dq[1] & 0x0F, dq[1] >> 4);
/* The first component must have a factor of 2x2 and the rest 1x1 */
if(dq[0] == 1 && dq[1] != 0x22)
{
fprintf(stderr, "Error: Component 1 sampling factor must be 2x2\n");
return(SSDV_ERROR);
}
else if(dq[0] != 1 && dq[1] != 0x11)
{
fprintf(stderr, "Error: Component %i sampling factor must be 1x1\n", dq[0]);
return(SSDV_ERROR);
}
}
break;