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Fix undefined bytebeat

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This commit is contained in:
Miloslav Číž 2020-09-13 10:53:04 +02:00
parent 1223bc89fa
commit c8cc373310
2 changed files with 20 additions and 12 deletions
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2
main_sdl.c
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@ -328,7 +328,7 @@ int main(int argc, char *argv[])
for (int i = 0; i < SFG_SFX_SAMPLE_COUNT; ++i)
audioBuff[i] = 127;
// SDL_PauseAudio(0);
SDL_PauseAudio(0);
running = 1;

30
sounds.h
View File

@ -63,10 +63,13 @@ uint8_t SFG_getNextMusicSample()
uint32_t result;
#define S SFG_MusicState.t
#define S SFG_MusicState.t // can't use "T" because of a C++ template
#define S2 SFG_MusicState.t2
#define N11S SFG_MusicState.n11t
/* CAREFUL! Bit shifts in any direction by amount greater than data type
width (32) are undefined behavior. Use % 32. */
switch (SFG_MusicState.track) // individual music tracks
{
case 0:
@ -81,14 +84,17 @@ uint8_t SFG_getNextMusicSample()
case 1:
{
result = (S & (3 << (((S >> 10) ^ ((S >> 10) << (S >> 6))))));
uint32_t a = (S >> 10);
result = S & (3 << (((a ^ (a << ((S >> 6) % 32)))) % 32));
break;
}
case 2:
{
result = ~((((S >> (S >> 2)) | (S >> (S >> 5))) & 0x12) << 1) | (S >> 11);
result =
~((((S >> ((S >> 2) % 32)) | (S >> ((S >> 5) % 32))) & 0x12) << 1)
| (S >> 11);
break;
}
@ -96,8 +102,8 @@ uint8_t SFG_getNextMusicSample()
case 3:
{
result =
((((S >> (S >> 2)) + (S >> (S >> 7)))) & 0x3f | (S >> 5) | (S >> 11))
& (S & (32768 | 8192) ? 0xf0 : 0x30);
((((S >> ((S >> 2) % 32)) + (S >> ((S >> 7) % 32)))) & 0x3f | (S >> 5)
| (S >> 11)) & (S & (32768 | 8192) ? 0xf0 : 0x30);
break;
}
@ -105,8 +111,9 @@ uint8_t SFG_getNextMusicSample()
case 4:
{
result =
((0x47 >> (S >> 9)) & (S >> S)) | (0x57 >> (S >> 7)) |
(0x06 >> (S >> (((N11S) >> 14) & 0x0e)));
((0x47 >> ((S >> 9) % 32)) & (S >> (S % 32))) |
(0x57 >> ((S >> 7) % 32)) |
(0x06 >> ((S >> ((((N11S) >> 14) & 0x0e) % 32)) % 32));
SFG_MusicState.n11t += 11;
@ -115,10 +122,11 @@ uint8_t SFG_getNextMusicSample()
case 5:
{
uint32_t a = S >> (S >> 6);
uint32_t b = 0x011121 >> ((a + S) >> 11);
result =
(((S >> 9) + (S ^ (S << 1))) & (0x7f >> ((S >> 15) & 0x03))) & (b + a);
uint32_t a = S >> ((S >> 6) % 32);
uint32_t b = 0x011121 >> (((a + S) >> 11) % 32);
result =
(((S >> 9) + (S ^ (S << 1))) & (0x7f >> (((S >> 15) & 0x03) % 32)))
& (b + a);
break;
}