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/*****************************************************************************
MB87078 6-bit,4-channel electronic volume controller emulator
*****************************************************************************/
#ifndef __MB87078_H__
#define __MB87078_H__
#include "devlegcy.h"
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
typedef void (*mb87078_gain_changed_cb)(running_machine &machine, int channel, int percent /*, float decibels*/);
typedef struct _mb87078_interface mb87078_interface;
struct _mb87078_interface
{
mb87078_gain_changed_cb gain_changed_cb;
};
class mb87078_device : public device_t
{
public:
mb87078_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~mb87078_device() { global_free(m_token); }
// access to legacy token
void *token() const { assert(m_token != NULL); return m_token; }
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
private:
// internal state
void *m_token;
};
extern const device_type MB87078;
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_MB87078_ADD(_tag, _interface) \
MCFG_DEVICE_ADD(_tag, MB87078, 0) \
MCFG_DEVICE_CONFIG(_interface)
/***************************************************************************
DEVICE I/O FUNCTIONS
***************************************************************************/
void mb87078_data_w(device_t *device, int data, int dsel);
void mb87078_reset_comp_w(device_t *device, int level);
/* mb87078_gain_decibel_r will return 'channel' gain on the device.
Returned value represents channel gain expressed in decibels,
Range from 0 to -32.0 (or -256.0 for -infinity) */
float mb87078_gain_decibel_r(device_t *device, int channel);
/* mb87078_gain_percent_r will return 'channel' gain on the device.
Returned value represents channel gain expressed in percents of maximum volume.
Range from 100 to 0. (100 = 0dB; 50 = -6dB; 0 = -infinity)
This function is designed for use with MAME mixer_xxx() functions. */
int mb87078_gain_percent_r(device_t *device, int channel);
#endif /* __MB87078_H__ */
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