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fixed color bug

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cool 2012-01-01 16:03:27 -11:00
parent 2a9d9c681d
commit ca79a7dcb2
1 changed files with 13 additions and 25 deletions
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38
libfreerdp-codec/nsc.c
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@ -149,7 +149,8 @@ void nsc_chroma_supersample(NSC_CONTEXT* context)
void nsc_ycocg_rgb(NSC_CONTEXT* context)
{
uint8* sbitstream[2];
uint8 bitoff, sign[2], ycocg[3], rgb[3], i;
uint8 bitoff, sign[2], i, val;
sint16 rgb[3], ycocg[3];
uint32 bytno, size;
size = context->OrgByteCount[0];
@ -166,33 +167,20 @@ void nsc_ycocg_rgb(NSC_CONTEXT* context)
bytno = context->OrgByteCount[i] - size;
bitoff = bytno % 8;
sign[i-1] = (*(sbitstream[i-1] + (bytno >> 3)) >> (7 - bitoff)) & 0x1;
if(sign[i-1])
ycocg[i] = ~(ycocg[i]) + 0x1;
ycocg[i] = (((sint16)(0 - sign[i-1])) << 8) | ycocg[i];
}
if (sign[0] && sign[1])
rgb[0] = ycocg[0] + (ycocg[1] >> 1) - (ycocg[2] >> 1);
rgb[1] = ycocg[0] + (ycocg[2] >> 1);
rgb[2] = ycocg[0] - (ycocg[1] >> 1) - (ycocg[2] >> 1);
for(i = 0; i < 3; i++)
{
rgb[0] = ycocg[0] - (ycocg[1] >> 1) + (ycocg[2] >> 1);
rgb[1] = ycocg[0] - (ycocg[2] >> 1);
rgb[2] = ycocg[0] + (ycocg[1] >> 1) + (ycocg[2] >> 1);
}
else if (sign[0])
{
rgb[0] = ycocg[0] - (ycocg[1] >> 1) - (ycocg[2] >> 1);
rgb[1] = ycocg[0] + (ycocg[2] >> 1);
rgb[2] = ycocg[0] + (ycocg[1] >> 1) - (ycocg[2] >> 1);
}
else if (sign[1])
{
rgb[0] = ycocg[0] + (ycocg[1] >> 1) + (ycocg[2] >> 1);
rgb[1] = ycocg[0] - (ycocg[2] >> 1);
rgb[2] = ycocg[0] - (ycocg[1] >> 1) + (ycocg[2] >> 1);
}
else
{
rgb[0] = ycocg[0] + (ycocg[1] >> 1) - (ycocg[2] >> 1);
rgb[1] = ycocg[0] + (ycocg[2] >> 1);
rgb[2] = ycocg[0] - (ycocg[1] >> 1) - (ycocg[2] >> 1);
if(((rgb[i] >> 8) & 0x1) == 0x1)
val = ~((uint8)rgb[i]) + 0x1;
else
val = rgb[i];
stream_write_uint8(context->org_buf[i], val);
}
for(i = 0; i < 3; i++)