kopia lustrzana https://github.com/Jean-MarcHarvengt/MCUME
37 wiersze
1.1 KiB
C
37 wiersze
1.1 KiB
C
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#ifndef _PSG_H_
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#define _PSG_H_
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/* Macro to access currently selected PSG channel */
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#define PSGCH psg.channel[psg.select]
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/* PSG structure */
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typedef struct {
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uint8 select; /* Selected channel (0-5) */
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uint8 globalbalance; /* Global sound balance */
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uint8 noisectrl; /* Noise enable and frequency */
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uint8 lfofreq; /* LFO frequency */
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uint8 lfoctrl; /* LFO control */
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struct {
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int counter; /* Waveform index counter */
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uint16 frequency; /* Channel frequency */
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uint8 control; /* Channel enable, DDA, volume */
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uint8 balance; /* Channel balance */
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uint8 waveform[32]; /* Waveform data */
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uint8 waveform_index; /* Waveform data index */
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} channel[8];
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}t_psg;
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/* Global variables */
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extern t_psg psg;
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/* Function prototypes */
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int psg_init(void);
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void psg_reset(void);
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void psg_shutdown(void);
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void psg_w(uint16 address, uint8 data);
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void psg_update(int16 *bufl, int16 *bufr, int length);
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#endif /* _PSG_H_ */
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