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

libgambatte/sound: drop use of WORDS_BIGENDIAN define

Browse Source
This commit is contained in:
sinamas 2013-03-23 13:26:42 +01:00
parent b068adcd3b
commit 6af3c132fe
1 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
libgambatte/src/sound.cpp
View File

@ -156,21 +156,25 @@ unsigned PSG::fillBuffer() {
return bufferPos;
}
#ifdef WORDS_BIGENDIAN
static const unsigned long so1Mul = 0x00000001;
static const unsigned long so2Mul = 0x00010000;
#else
static const unsigned long so1Mul = 0x00010000;
static const unsigned long so2Mul = 0x00000001;
#endif
static bool isBigEndianSampleOrder() {
union {
uint_least32_t ul32;
unsigned char uc[sizeof(uint_least32_t)];
} u;
u.ul32 = -0x10000;
return u.uc[0];
}
static unsigned long so1Mul() { return isBigEndianSampleOrder() ? 0x00000001 : 0x00010000; }
static unsigned long so2Mul() { return isBigEndianSampleOrder() ? 0x00010000 : 0x00000001; }
void PSG::set_so_volume(const unsigned nr50) {
soVol = ((nr50 & 0x7) + 1) * so1Mul * 64
+ ((nr50 >> 4 & 0x7) + 1) * so2Mul * 64;
soVol = ((nr50 & 0x7) + 1) * so1Mul() * 64
+ ((nr50 >> 4 & 0x7) + 1) * so2Mul() * 64;
}
void PSG::map_so(const unsigned nr51) {
const unsigned long tmp = nr51 * so1Mul + (nr51 >> 4) * so2Mul;
const unsigned long tmp = nr51 * so1Mul() + (nr51 >> 4) * so2Mul();
ch1.setSo((tmp & 0x00010001) * 0xFFFF);
ch2.setSo((tmp >> 1 & 0x00010001) * 0xFFFF);