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Allow replacement of the sin() function used to populate the panning table

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Co-Authored-By: Evan Ramos <1585791+hendricks266@users.noreply.github.com>
This commit is contained in:
Jasmine Iwanek
2024-07-10 04:11:26 -04:00
parent 996e5cc784
commit e5aa36919b
1 changed files with 4 additions and 2 deletions
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6
src/sound/snd_opl_nuked.c
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@@ -56,11 +56,13 @@
#define OPL_ENABLE_STEREOEXT 0 #define OPL_ENABLE_STEREOEXT 0
#endif #endif
#if OPL_ENABLE_STEREOEXT #if OPL_ENABLE_STEREOEXT && !defined OPL_SIN
#ifndef _USE_MATH_DEFINES #ifndef _USE_MATH_DEFINES
#define _USE_MATH_DEFINES 1 #define _USE_MATH_DEFINES 1
#endif #endif
#include <math.h> #include <math.h>
// input: [0, 256), output: [0, 65536]
#define OPL_SIN(x) ((int32_t)(sin((x) * M_PI / 512.0) * 65536.0))
#endif #endif
/* Quirk: Some FM channels are output one sample later on the left side than the right. */ /* Quirk: Some FM channels are output one sample later on the left side than the right. */
@@ -1551,7 +1553,7 @@ nuked_init(nuked_t *dev, uint32_t samplerate)
#if OPL_ENABLE_STEREOEXT #if OPL_ENABLE_STEREOEXT
if (!panpot_lut_build) { if (!panpot_lut_build) {
for (int32_t i = 0; i < 256; i++) for (int32_t i = 0; i < 256; i++)
panpot_lut[i] = (int32_t)(sin(i * M_PI / 512.0) * 65536.0); panpot_lut[i] = OPL_SIN(i);
panpot_lut_build = 1; panpot_lut_build = 1;
} }
#endif #endif