AY8910 PSG implementation. More...

Macros
#define	AY8910_TRACE 0
	Enable AY8910 tracing.

#define	tracef(fmt, ...) ({ })
	Trace function for AY8910 debugging.

#define	V(f) ((f) * AY8910_VOLUME_ATTENUATE)
	Volume conversion function.

#define	SAMPLE_CONV(f) ((f) * 65535.0f - 32768.0f)
	Sample conversion function.

#define	OUTS(s)
	Output sample in stereo mode.

#define	OUT(s_)
	Output mono sample.

Functions
int	ay8910_gen (AY8910 ay, int16_t out, int nsamples)
	Generate audio for the specified number of samples.

void	ay8910_reset (AY8910 *ay)
	Reset the AY8910 emulator.

void	ay8910_set_ports (AY8910 ay, uint8_t(PortRead)(int), void(*PortWrite)(int, uint8_t))
	Configure the I/O port callbacks.

bool	ay8910_is_mute (AY8910 *ay)
	Return true if ay8910 is currently muted (all channels disabled)

void	ay8910_write_addr (AY8910 *ay, uint8_t addr)
	Write to the AY8910 address line.

uint8_t	ay8910_read_data (AY8910 *ay)
	Read from the AY8910 data line.

void	ay8910_write_data (AY8910 *ay, uint8_t val)
	Write to the AY8910 data line.

Detailed Description

AY8910 PSG implementation.

Author: Giovanni Bajo giova.nosp@m.nnib.nosp@m.ajo@g.nosp@m.mail.nosp@m..com

Macro Definition Documentation

#define OUTS ( s )

Value:

    ({ \
    *out++ = (int16_t)SAMPLE_CONV(s); \
    if (AY8910_OUTPUT_STEREO) *out++ = (int16_t)SAMPLE_CONV(s); \
})

Output sample in stereo mode.

#define OUT ( s_ )

Value:

        ({ \
        int16_t s = (int16_t)(s_); \
        *out++ = (int16_t)(s); \
    })

Output mono sample.

Generate audio for the specified number of samples.

"nsamples" is the number of samples after decimation (so the exact number of samples written in the output buffer).