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+// license:GPL-2.0+
+// copyright-holders:Matthew Conte
+/*****************************************************************************
+
+ MAME/MESS NES APU CORE
+
+ Based on the Nofrendo/Nosefart NES RP2A03 sound emulation core written by
+ Matthew Conte (matt@conte.com) and redesigned for use in MAME/MESS by
+ Who Wants to Know? (wwtk@mail.com)
+
+ This core is written with the advise and consent of Matthew Conte and is
+ released under the GNU Public License.
+
+ *****************************************************************************
+
+ mmc5.h
+
+ MMC5 sound emulation core.
+
+ *****************************************************************************/
+
+#ifndef MAME_SOUND_MMC5_H
+#define MAME_SOUND_MMC5_H
+
+#pragma once
+
+
+#include "nes_defs.h"
+
+class mmc5_sound_device : public device_t,
+ public device_sound_interface
+{
+public:
+ mmc5_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+ // configuration helpers
+ auto irq() { return m_irq_handler.bind(); }
+
+ u8 read(offs_t offset);
+ void write(offs_t offset, u8 data);
+ void pcm_w(u8 data);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+ virtual void device_clock_changed() override;
+
+ // sound stream update overrides
+ virtual void sound_stream_update(sound_stream &stream) override;
+
+private:
+ /* GLOBAL CONSTANTS */
+ static constexpr unsigned SYNCS_MAX1 = 0x20;
+
+ // internal state
+ mmc5_sound_t m_core; /* Sound core */
+ u32 m_samps_per_sync; /* Number of samples per vsync */
+ u32 m_vbl_times[SYNCS_MAX1]; /* VBL durations in samples */
+ u32 m_sync_times1[SYNCS_MAX1]; /* Samples per sync table */
+ sound_stream::sample_t m_square_lut[31]; // Non-linear Square wave output LUT
+
+ sound_stream *m_stream;
+ devcb_write_line m_irq_handler;
+
+ u16 m_frame_clocks;
+
+ void calculate_rates();
+ void tick_square(mmc5_sound_t::square_t &chan);
+};
+
+
+DECLARE_DEVICE_TYPE(MMC5_SOUND, mmc5_sound_device)
+
+#endif // MAME_SOUND_MMC5_H