sinamas/gambatte
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

common: drop use of WORDS_BIGENDIAN

Browse Source
This commit is contained in:
sinamas 2013-03-23 14:11:57 +01:00
parent f7537ad442
commit 471d942549
1 changed files with 35 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
common/videolink/rgb32conv.cpp
View File

@ -24,6 +24,15 @@
namespace {
static bool isBigEndian() {
union {
gambatte::uint_least32_t ul32;
unsigned char uc[sizeof(gambatte::uint_least32_t)];
} u;
u.ul32 = -0x10000;
return u.uc[0];
}
class Rgb32ToUyvy {
struct CacheUnit {
gambatte::uint_least32_t rgb32;
@ -42,12 +51,13 @@ public:
};
Rgb32ToUyvy::Rgb32ToUyvy() {
#ifdef WORDS_BIGENDIAN
const CacheUnit c = { 0, 128ul << 24 | 16ul << 16 | 128 << 8 | 16 };
#else
const CacheUnit c = { 0, 16ul << 24 | 128ul << 16 | 16 << 8 | 128 };
#endif
if (isBigEndian()) {
CacheUnit c = { 0, 128ul << 24 | 16ul << 16 | 128 << 8 | 16 };
std::fill(cache, cache + cache_size, c);
} else {
CacheUnit c = { 0, 16ul << 24 | 128ul << 16 | 16 << 8 | 128 };
std::fill(cache, cache + cache_size, c);
}
}
void Rgb32ToUyvy::operator()(const gambatte::uint_least32_t *s, gambatte::uint_least32_t *d,
@ -69,19 +79,25 @@ void Rgb32ToUyvy::operator()(const gambatte::uint_least32_t *s, gambatte::uint_l
const unsigned long u = b * 112 - r * 38 - g * 74 + (128 * 256 + 128) * 0x00010001ul;
const unsigned long v = r * 112 - g * 94 - b * 18 + (128 * 256 + 128) * 0x00010001ul;
#ifdef WORDS_BIGENDIAN
cache[s[0] & cache_mask].uyvy = (u << 16 & 0xFF000000) | (y << 8 & 0x00FF0000)
| (v & 0x0000FF00) | (y >> 8 & 0x000000FF);
cache[s[1] & cache_mask].uyvy = (u & 0xFF000000) | (y >> 8 & 0x00FF0000)
| (v >> 16 & 0x0000FF00) | y >> 24 ;
#else
cache[s[0] & cache_mask].uyvy = (y << 16 & 0xFF000000) | (v << 8 & 0x00FF0000)
| (y & 0x0000FF00) | (u >> 8 & 0x000000FF);
cache[s[1] & cache_mask].uyvy = (y & 0xFF000000) | (v >> 8 & 0x00FF0000)
| (y >> 16 & 0x0000FF00) | u >> 24 ;
#endif
if (isBigEndian()) {
cache[s[0] & cache_mask].uyvy = (u << 16 & 0xFF000000)
| (y << 8 & 0x00FF0000)
| (v & 0x0000FF00)
| (y >> 8 & 0x000000FF);
cache[s[1] & cache_mask].uyvy = (u & 0xFF000000)
| (y >> 8 & 0x00FF0000)
| (v >> 16 & 0x0000FF00)
| y >> 24 ;
} else {
cache[s[0] & cache_mask].uyvy = (y << 16 & 0xFF000000)
| (v << 8 & 0x00FF0000)
| (y & 0x0000FF00)
| (u >> 8 & 0x000000FF);
cache[s[1] & cache_mask].uyvy = (y & 0xFF000000)
| (v >> 8 & 0x00FF0000)
| (y >> 16 & 0x0000FF00)
| u >> 24 ;
}
}
d[0] = cache[s[0] & cache_mask].uyvy;