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POKEY: remove dithering 

we only use 16-bit output anyway
This commit is contained in:
tildearrow 2022-12-20 15:07:58 -05:00
parent b7302e0d98
commit 15dc663a15
2 changed files with 1 additions and 19 deletions
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19
src/engine/platform/sound/pokey/mzpokeysnd.c
View File

@ -1637,23 +1637,6 @@ void Update_pokey_sound_mz(PokeyState* ps, unsigned short addr, unsigned char va
#define MAX_SAMPLE 152
void mzpokeysnd_process_8(PokeyState* ps, void* sndbuffer, int sndn)
{
int i;
int nsam = sndn;
unsigned char *buffer = (unsigned char *) sndbuffer;
/* if there are two pokeys, then the signal is stereo
we assume even sndn */
while(nsam >= 1)
{
buffer[0] = (unsigned char)floor(generate_sample(ps)
* (255.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
buffer += 1;
nsam -= 1;
}
}
void mzpokeysnd_process_16(PokeyState* ps, void* sndbuffer, int sndn)
{
int i;
@ -1665,7 +1648,7 @@ void mzpokeysnd_process_16(PokeyState* ps, void* sndbuffer, int sndn)
while(nsam >= (int) 1)
{
buffer[0] = (short)floor(generate_sample(ps)
* (65535.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
* (65535.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95));
buffer += 1;
nsam -= 1;
}

1
src/engine/platform/sound/pokey/mzpokeysnd.h
View File

@ -149,7 +149,6 @@ typedef struct stPokeyState
int outvol_3;
} PokeyState;
void mzpokeysnd_process_8(PokeyState* ps, void* sndbuffer, int sndn);
void mzpokeysnd_process_16(PokeyState* ps, void* sndbuffer, int sndn);
void Update_pokey_sound_mz(PokeyState* ps, unsigned short addr, unsigned char val, unsigned char gain);