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+/***************************************************************************
+
+ okim9810.h
+
+ OKI MSM9810 ADCPM(2) sound chip.
+
+ Notes:
+ The master clock frequency for this chip can range from 3.5MHz to 4.5Mhz.
+ The typical oscillator is a 4.096Mhz crystal.
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __OKIM9810_H__
+#define __OKIM9810_H__
+
+#include "okiadpcm.h"
+
+
+//**************************************************************************
+// CONSTANTS
+//**************************************************************************
+
+enum
+{
+ OKIM9810_ADPCM_PLAYBACK = 0,
+ OKIM9810_ADPCM2_PLAYBACK = 1,
+ OKIM9810_STRAIGHT8_PLAYBACK = 2,
+ OKIM9810_NONLINEAR8_PLAYBACK = 3
+};
+
+enum
+{
+ OKIM9810_SECONDARY_FILTER = 0,
+ OKIM9810_PRIMARY_FILTER = 1,
+ OKIM9810_NO_FILTER = 2,
+ OKIM9810_NO_FILTER2 = 3
+};
+
+enum
+{
+ OKIM9810_OUTPUT_TO_DIRECT_DAC = 0,
+ OKIM9810_OUTPUT_TO_VOLTAGE_FOLLOWER = 1
+};
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_OKIM9810_ADD(_tag, _clock) \
+ MCFG_DEVICE_ADD(_tag, OKIM9810, _clock)
+
+#define MCFG_OKIM9810_REPLACE(_tag, _clock) \
+ MCFG_DEVICE_REPLACE(_tag, OKIM9810, _clock)
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+
+// ======================> okim9810_device
+
+class okim9810_device : public device_t,
+ public device_sound_interface,
+ public device_memory_interface
+{
+public:
+ // construction/destruction
+ okim9810_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ UINT8 read_status();
+ void write_TMP_register(UINT8 command);
+ void write_command(UINT8 command);
+
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+ DECLARE_WRITE8_MEMBER( write_TMP_register );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_post_load();
+ virtual void device_clock_changed();
+
+ // device_memory_interface overrides
+ virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const;
+
+ // device_sound_interface overrides
+ virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+
+ // a single voice
+ class okim_voice
+ {
+ public:
+ okim_voice();
+ void generate_audio(direct_read_data &direct,
+ stream_sample_t **buffers,
+ int samples,
+ const UINT8 global_volume,
+ const UINT32 clock,
+ const UINT8 filter_type);
+
+ // computes volume scale from 3 volume numbers
+ UINT8 volume_scale(const UINT8 global_volume,
+ const UINT8 channel_volume,
+ const UINT8 pan_volume) const;
+
+ oki_adpcm_state m_adpcm; // current ADPCM state
+ oki_adpcm2_state m_adpcm2; // current ADPCM2 state
+ UINT8 m_playbackAlgo; // current playback method
+ bool m_looping;
+ UINT8 m_startFlags;
+ UINT8 m_endFlags;
+ offs_t m_base_offset; // pointer to the base memory location
+ UINT32 m_count; // total samples to play
+ UINT32 m_samplingFreq; // voice sampling frequency
+
+ bool m_playing; // playback state
+ UINT32 m_sample; // current sample number
+
+ UINT8 m_channel_volume; // volume index set with the CVOL command
+ UINT8 m_pan_volume_left; // volume index set with the PAN command
+ UINT8 m_pan_volume_right; // volume index set with the PAN command
+
+ INT32 m_startSample; // interpolation state - sample to interpolate from
+ INT32 m_endSample; // interpolation state - sample to interpolate to
+ UINT32 m_interpSampleNum; // interpolation state - fraction between start & end
+
+ static const UINT8 s_volume_table[16];
+ };
+
+
+ // internal state
+ const address_space_config m_space_config;
+
+ sound_stream* m_stream;
+ direct_read_data* m_direct;
+
+ UINT8 m_TMP_register;
+
+ UINT8 m_global_volume; // volume index set with the OPT command
+ UINT8 m_filter_type; // interpolation filter type set with the OPT command
+ UINT8 m_output_level; // flag stating if a voltage follower is connected
+
+ static const int OKIM9810_VOICES = 8;
+ okim_voice m_voice[OKIM9810_VOICES];
+
+ static const UINT32 s_sampling_freq_table[16];
+};
+
+
+// device type definition
+extern const device_type OKIM9810;
+
+
+
+#endif // __OKIM9810_H__