/********************************************** Philips SAA1099 Sound driver **********************************************/ #pragma once #ifndef __SAA1099_H__ #define __SAA1099_H__ //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_SAA1099_ADD(_tag, _clock) \ MCFG_DEVICE_ADD(_tag, SAA1099, _clock) #define MCFG_SAA1099_REPLACE(_tag, _clock) \ MCFG_DEVICE_REPLACE(_tag, SAA1099, _clock) //************************************************************************** // TYPE DEFINITIONS //************************************************************************** struct saa1099_channel { saa1099_channel() : frequency(0), freq_enable(0), noise_enable(0), octave(0), counter(0.0), freq(0.0), level(0) { memset(amplitude, 0, sizeof(int)*2); memset(envelope, 0, sizeof(int)*2); } int frequency; /* frequency (0x00..0xff) */ int freq_enable; /* frequency enable */ int noise_enable; /* noise enable */ int octave; /* octave (0x00..0x07) */ int amplitude[2]; /* amplitude (0x00..0x0f) */ int envelope[2]; /* envelope (0x00..0x0f or 0x10 == off) */ /* vars to simulate the square wave */ double counter; double freq; int level; }; struct saa1099_noise { saa1099_noise() : counter(0.0), freq(0.0), level(0) {} /* vars to simulate the noise generator output */ double counter; double freq; int level; /* noise polynomal shifter */ }; // ======================> saa1099_device class saa1099_device : public device_t, public device_sound_interface { public: saa1099_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); ~saa1099_device() { } protected: // device-level overrides virtual void device_start(); // sound stream update overrides virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples); public: DECLARE_WRITE8_MEMBER( saa1099_control_w ); DECLARE_WRITE8_MEMBER( saa1099_data_w ); private: void saa1099_envelope(int ch); private: sound_stream *m_stream; /* our stream */ int m_noise_params[2]; /* noise generators parameters */ int m_env_enable[2]; /* envelope generators enable */ int m_env_reverse_right[2]; /* envelope reversed for right channel */ int m_env_mode[2]; /* envelope generators mode */ int m_env_bits[2]; /* non zero = 3 bits resolution */ int m_env_clock[2]; /* envelope clock mode (non-zero external) */ int m_env_step[2]; /* current envelope step */ int m_all_ch_enable; /* all channels enable */ int m_sync_state; /* sync all channels */ int m_selected_reg; /* selected register */ saa1099_channel m_channels[6]; /* channels */ saa1099_noise m_noise[2]; /* noise generators */ double m_sample_rate; }; extern const device_type SAA1099; #endif /* __SAA1099_H__ */