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sound: fix faint sound buzzing (from https://github.com/atari800/atari800/commit/43fa9)

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cmitu
2020-03-19 06:39:22 +00:00
parent 84b69d2db0
commit da7893488b
1 changed files with 16 additions and 16 deletions
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atari800/src/mzpokeysnd.c
+16 -16
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@@ -2341,16 +2341,16 @@ static void mzpokeysnd_process_8(void* sndbuffer, int sndn)
#endif
#ifdef VOL_ONLY_SOUND
buffer[0] = (UBYTE)floor((generate_sample(pokey_states) + POKEYSND_sampout - MAX_SAMPLE / 2.0)
* (255.0 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
buffer[0] = (UBYTE)floor((generate_sample(pokey_states) + POKEYSND_sampout)
* (255.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
#else
buffer[0] = (UBYTE)floor((generate_sample(pokey_states) - MAX_SAMPLE / 2.0)
* (255.0 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
buffer[0] = (UBYTE)floor(generate_sample(pokey_states)
* (255.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
#endif
for(i=1; i<num_cur_pokeys; i++)
{
buffer[i] = (UBYTE)floor((generate_sample(pokey_states + i) - MAX_SAMPLE / 2.0)
* (255.0 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
buffer[i] = (UBYTE)floor(generate_sample(pokey_states + i)
* (255.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
}
buffer += num_cur_pokeys;
nsam -= num_cur_pokeys;
@@ -2389,16 +2389,16 @@ static void mzpokeysnd_process_16(void* sndbuffer, int sndn)
}
#endif
#ifdef VOL_ONLY_SOUND
buffer[0] = (SWORD)floor((generate_sample(pokey_states) + POKEYSND_sampout - MAX_SAMPLE / 2.0)
* (65535.0 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
buffer[0] = (SWORD)floor((generate_sample(pokey_states) + POKEYSND_sampout)
* (65535.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
#else
buffer[0] = (SWORD)floor((generate_sample(pokey_states) - MAX_SAMPLE / 2.0)
* (65535.0 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
buffer[0] = (SWORD)floor(generate_sample(pokey_states)
* (65535.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
#endif
for(i=1; i<num_cur_pokeys; i++)
{
buffer[i] = (SWORD)floor((generate_sample(pokey_states + i) - MAX_SAMPLE / 2.0)
* (65535.0 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
buffer[i] = (SWORD)floor(generate_sample(pokey_states + i)
* (65535.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
}
buffer += num_cur_pokeys;
nsam -= num_cur_pokeys;
@@ -2434,16 +2434,16 @@ static void generate_sync(unsigned int num_ticks)
advance_ticks(pokey_states + i, ticks);
if (POKEYSND_snd_flags & POKEYSND_BIT16) {
*((SWORD *)buffer) = (SWORD)floor(
(interp_read_resam_all(pokey_states + i, samp_pos) - MAX_SAMPLE / 2.0)
* (65535.0 / MAX_SAMPLE / 4 * M_PI * 0.95)
interp_read_resam_all(pokey_states + i, samp_pos)
* (volume.s16 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95)
+ 0.5 + 0.5 * rand() / RAND_MAX - 0.25
);
buffer += 2;
}
else
*buffer++ = (UBYTE)floor(
(interp_read_resam_all(pokey_states + i, samp_pos) - MAX_SAMPLE / 2.0)
* (255.0 / MAX_SAMPLE / 4 * M_PI * 0.95)
interp_read_resam_all(pokey_states + i, samp_pos)
* (volume.s8 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95)
+ 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25
);
}