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simple_idct: remove code for DCTELEM != int16

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DCTELEM can never be changed to anything else, too much code
depends on it.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2011-07-18 15:23:22 +01:00
parent 3f5dcde7e6
commit dbb5ee8ea7
1 changed files with 15 additions and 30 deletions
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45
libavcodec/simple_idct.c
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@ -59,39 +59,24 @@ static inline void idctRowCondDC (DCTELEM * row)
#else
#define ROW0_MASK 0xffffLL
#endif
if(sizeof(DCTELEM)==2){
if ( ((((uint64_t *)row)[0] & ~ROW0_MASK) |
((uint64_t *)row)[1]) == 0) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
temp += temp << 32;
((uint64_t *)row)[0] = temp;
((uint64_t *)row)[1] = temp;
return;
}
}else{
if (!(row[1]|row[2]|row[3]|row[4]|row[5]|row[6]|row[7])) {
row[0]=row[1]=row[2]=row[3]=row[4]=row[5]=row[6]=row[7]= row[0] << 3;
return;
}
if (((((uint64_t *)row)[0] & ~ROW0_MASK) | ((uint64_t *)row)[1]) == 0) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
temp += temp << 32;
((uint64_t *)row)[0] = temp;
((uint64_t *)row)[1] = temp;
return;
}
#else
if(sizeof(DCTELEM)==2){
if (!(((uint32_t*)row)[1] |
((uint32_t*)row)[2] |
((uint32_t*)row)[3] |
row[1])) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
((uint32_t*)row)[0]=((uint32_t*)row)[1] =
if (!(((uint32_t*)row)[1] |
((uint32_t*)row)[2] |
((uint32_t*)row)[3] |
row[1])) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
((uint32_t*)row)[0]=((uint32_t*)row)[1] =
((uint32_t*)row)[2]=((uint32_t*)row)[3] = temp;
return;
}
}else{
if (!(row[1]|row[2]|row[3]|row[4]|row[5]|row[6]|row[7])) {
row[0]=row[1]=row[2]=row[3]=row[4]=row[5]=row[6]=row[7]= row[0] << 3;
return;
}
return;
}
#endif