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some cleanup

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7519 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
arpi 2002-09-27 22:29:43 +00:00
parent 0bcbbd8705
commit 5bda061647
1 changed files with 32 additions and 83 deletions
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115
libmpcodecs/native/cyuv.c
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@ -35,101 +35,50 @@
*/
void decode_cyuv(unsigned char *buf, int size, unsigned char *frame, int width, int height, int format)
{
int i, xpos, ypos, cur_Y = 0, cur_U = 0, cur_V = 0;
char *delta_y_tbl, *delta_c_tbl, *ptr;
unsigned int i, xpos, ypos;
unsigned char *delta_y_tbl, *delta_c_tbl, *ptr;
delta_y_tbl = buf + 16;
delta_c_tbl = buf + 32;
ptr = buf + (16 * 3);
for(ypos = 0; ypos < height; ypos++)
for(xpos = 0; xpos < width; xpos += 4)
{
if(xpos == 0) /* first pixels in scanline */
{
for(xpos = 0; xpos < width; xpos += 2){
unsigned char cur_Y1,cur_Y2,cur_U,cur_V;
if(xpos&2){
i = *(ptr++);
cur_Y1 = (cur_Y2 + delta_y_tbl[i & 0x0f])/* & 0xff*/;
cur_Y2 = (cur_Y1 + delta_y_tbl[i >> 4])/* & 0xff*/;
} else {
if(xpos == 0) { /* first pixels in scanline */
cur_U = *(ptr++);
cur_Y = (cur_U & 0x0f) << 4;
cur_Y1= (cur_U & 0x0f) << 4;
cur_U = cur_U & 0xf0;
if (format == IMGFMT_YUY2)
{
*frame++ = cur_Y;
*frame++ = cur_U;
}
else
{
*frame++ = cur_U;
*frame++ = cur_Y;
}
cur_V = *(ptr++);
cur_Y = (cur_Y + delta_y_tbl[cur_V & 0x0f]) & 0xff;
cur_Y2= (cur_Y1 + delta_y_tbl[cur_V & 0x0f])/* & 0xff*/;
cur_V = cur_V & 0xf0;
if (format == IMGFMT_YUY2)
{
*frame++ = cur_Y;
*frame++ = cur_V;
}
else
{
*frame++ = cur_V;
*frame++ = cur_Y;
}
}
else /* subsequent pixels in scanline */
{
} else { /* subsequent pixels in scanline */
i = *(ptr++);
cur_U = (cur_U + delta_c_tbl[i >> 4]) & 0xff;
cur_Y = (cur_Y + delta_y_tbl[i & 0x0f]) & 0xff;
if (format == IMGFMT_YUY2)
{
*frame++ = cur_Y;
*frame++ = cur_U;
}
else
{
*frame++ = cur_U;
*frame++ = cur_Y;
}
cur_U = (cur_U + delta_c_tbl[i >> 4])/* & 0xff*/;
cur_Y1= (cur_Y2 + delta_y_tbl[i & 0x0f])/* & 0xff*/;
i = *(ptr++);
cur_V = (cur_V + delta_c_tbl[i >> 4]) & 0xff;
cur_Y = (cur_Y + delta_y_tbl[i & 0x0f]) & 0xff;
if (format == IMGFMT_YUY2)
{
*frame++ = cur_Y;
*frame++ = cur_V;
}
else
{
*frame++ = cur_V;
*frame++ = cur_Y;
}
}
i = *(ptr++);
cur_Y = (cur_Y + delta_y_tbl[i & 0x0f]) & 0xff;
if (format == IMGFMT_YUY2)
{
*frame++ = cur_Y;
*frame++ = cur_U;
}
else
{
*frame++ = cur_U;
*frame++ = cur_Y;
}
cur_Y = (cur_Y + delta_y_tbl[i >> 4]) & 0xff;
if (format == IMGFMT_YUY2)
{
*frame++ = cur_Y;
*frame++ = cur_V;
}
else
{
*frame++ = cur_V;
*frame++ = cur_Y;
}
cur_V = (cur_V + delta_c_tbl[i >> 4])/* & 0xff*/;
cur_Y2= (cur_Y1 + delta_y_tbl[i & 0x0f])/* & 0xff*/;
}
}
if (format == IMGFMT_YUY2) {
*frame++ = cur_Y1;
*frame++ = cur_U;
*frame++ = cur_Y2;
*frame++ = cur_V;
} else {
*frame++ = cur_U;
*frame++ = cur_Y1;
*frame++ = cur_V;
*frame++ = cur_Y2;
}
}
}