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// license:BSD-3-Clause
// copyright-holders:Mirko Buffoni,Aaron Giles,cam900
/***************************************************************************
tt5665.h
Tontek TT5665 ADCPM sound chip.
***************************************************************************/
#ifndef MAME_SOUND_TT5665_H
#define MAME_SOUND_TT5665_H
#pragma once
#include "sound/okiadpcm.h"
#include "dirom.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> tt5665_device
class tt5665_device : public device_t,
public device_sound_interface,
public device_rom_interface<24>
{
public:
enum ss_state
{
SS_LOW = 0,
SS_HIGH = 1
};
// construction/destruction
tt5665_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock, ss_state ss, u8 s0_s1)
: tt5665_device(mconfig, tag, owner, clock)
{
config_ss(ss);
config_s0_s1(s0_s1);
}
tt5665_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
// inline configuration helpers
void config_ss(ss_state ss) { assert(!started()); m_ss_state = ss; }
void config_s0_s1(u8 s0_s1) { assert(!started()); m_s0_s1_state = s0_s1 & 3; }
// runtime configuration
void set_ss(bool ss);
void set_s0_s1(int s0_s1);
u8 read(offs_t offset);
void write(offs_t offset, u8 data);
// CPU interface with CSL, CSR pin
u8 csl_r() { return read(0); }
u8 csr_r() { return read(1); }
void csl_w(u8 data) { write(0, data); }
void csr_w(u8 data) { write(1, data); }
protected:
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const override;
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_post_load() override;
virtual void device_clock_changed() override;
// device_sound_interface overrides
virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
// device_rom_interface overrides
virtual void rom_bank_pre_change() override;
private:
// a single voice
class tt5665_voice
{
public:
tt5665_voice();
void generate_adpcm(device_rom_interface &rom, s32 *buffer);
oki_adpcm_state m_adpcm; // current ADPCM state
bool m_playing;
offs_t m_base_offset; // pointer to the base memory location
u32 m_sample; // current sample number
u32 m_count; // total samples to play
stream_buffer::sample_t m_volume; // output volume
};
// configuration state
u8 m_ss_state;
u8 m_s0_s1_state;
// internal state
static constexpr int TT5665_VOICES = 4;
tt5665_voice m_voice[TT5665_VOICES * 2]; // separated voice for left and right output
s32 m_command[2]; // separated command for left and right output
sound_stream* m_stream;
s32 m_daol_output;
int m_daol_timing;
inline int freq_divider() const { return m_ss_state ? 136 : 170; }
static const stream_buffer::sample_t s_volume_table[16];
};
// device type definition
DECLARE_DEVICE_TYPE(TT5665, tt5665_device)
#endif // MAME_SOUND_TT5665_H
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