// license:BSD-3-Clause // copyright-holders:Valley Bell #ifndef MAME_SOUND_ROLAND_LP_H #define MAME_SOUND_ROLAND_LP_H #pragma once #include "dirom.h" class mb87419_mb87420_device : public device_t, public device_sound_interface, public device_rom_interface<22> { public: mb87419_mb87420_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); auto int_callback() { return m_int_callback.bind(); } u8 read(offs_t offset); void write(offs_t offset, u8 data); protected: // device_t implementation virtual void device_start() override ATTR_COLD; virtual void device_reset() override ATTR_COLD; // device_sound_interface implementation virtual void sound_stream_update(sound_stream &stream, std::vector const &inputs, std::vector &outputs) override; // device_rom_interface implementation virtual void rom_bank_pre_change() override; static int16_t decode_sample(int8_t data); static int16_t sample_interpolate(int16_t smp1, int16_t smp2, uint16_t frac); private: static constexpr unsigned NUM_CHANNELS = 32; struct pcm_channel { pcm_channel() { } // registers uint16_t mode = 0; uint16_t bank = 0; uint16_t step = 0; // 2.14 fixed point (0x4000 equals 32000 Hz) uint16_t volume = 0; uint32_t start = 0; // start address (18.14 fixed point) uint16_t end = 0; // end offset (high word) uint16_t loop = 0; // loop offset (high word) // work variables bool enable = false; int8_t play_dir = 0; // playing direction, -1 [backwards] / 0 [stopped] / +1 [forwards] uint32_t addr = 0; // current address int16_t smpl_cur = 0; // current sample int16_t smpl_nxt = 0; // next sample }; devcb_write_line m_int_callback; uint32_t m_clock; // clock uint32_t m_rate; // sample rate (usually 32000 Hz) sound_stream* m_stream; // stream handle pcm_channel m_chns[NUM_CHANNELS]; // channel memory uint8_t m_sel_chn; // selected channel }; DECLARE_DEVICE_TYPE(MB87419_MB87420, mb87419_mb87420_device) #endif // MAME_SOUND_ROLAND_LP_H