// license:BSD-3-Clause // copyright-holders:Olivier Galibert, R. Belmont, hap, superctr /* ZOOM ZSG-2 custom wavetable synthesizer */ #ifndef MAME_SOUND_ZSG2_H #define MAME_SOUND_ZSG2_H #pragma once // ======================> zsg2_device class zsg2_device : public device_t, public device_sound_interface { public: zsg2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); // configuration helpers auto ext_read() { return m_ext_read_handler.bind(); } DECLARE_READ16_MEMBER(read); DECLARE_WRITE16_MEMBER(write); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; // sound stream update overrides virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override; private: const uint16_t STATUS_ACTIVE = 0x8000; // 16 registers per channel, 48 channels struct zchan { uint16_t v[16]; uint16_t status; uint32_t cur_pos; uint32_t step_ptr; uint32_t step; uint32_t start_pos; uint32_t end_pos; uint32_t loop_pos; uint32_t page; uint16_t vol; uint16_t vol_initial; uint16_t vol_target; int16_t vol_delta; uint16_t output_cutoff; uint16_t output_cutoff_initial; uint16_t output_cutoff_target; int16_t output_cutoff_delta; int32_t emphasis_filter_state; int32_t output_filter_state; // Attenuation for output channels uint8_t output_gain[4]; int16_t samples[5]; // +1 history }; uint16_t m_gain_tab[256]; uint16_t m_reg[32]; zchan m_chan[48]; uint32_t m_sample_count; required_region_ptr m_mem_base; uint32_t m_read_address; std::unique_ptr m_mem_copy; uint32_t m_mem_blocks; std::unique_ptr m_full_samples; sound_stream *m_stream; devcb_read32 m_ext_read_handler; uint32_t read_memory(uint32_t offset); void chan_w(int ch, int reg, uint16_t data); uint16_t chan_r(int ch, int reg); void control_w(int reg, uint16_t data); uint16_t control_r(int reg); int16_t *prepare_samples(uint32_t offset); void filter_samples(zchan *ch); int16_t get_ramp(uint8_t val); inline uint16_t ramp(uint16_t current, uint16_t target, int16_t delta); }; DECLARE_DEVICE_TYPE(ZSG2, zsg2_device) #endif // MAME_SOUND_ZSG2_H