// license:BSD-3-Clause // copyright-holders:Juergen Buchmueller, Manuel Abadia /********************************************** Philips SAA1099 Sound driver **********************************************/ #ifndef MAME_SOUND_SAA1099_H #define MAME_SOUND_SAA1099_H #pragma once //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> 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_t clock); void control_w(u8 data); void data_w(u8 data); void write(offs_t offset, u8 data); protected: // device-level overrides virtual void device_start() override; virtual void device_clock_changed() 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: struct saa1099_channel { saa1099_channel() : amplitude{ 0, 0 }, envelope{ 0, 0 } { } int frequency = 0; /* frequency (0x00..0xff) */ int freq_enable = 0; /* frequency enable */ int noise_enable = 0; /* noise enable */ int octave = 0; /* 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 = 0.0; double freq = 0.0; int level = 0; }; struct saa1099_noise { saa1099_noise() { } /* vars to simulate the noise generator output */ double counter = 0.0; double freq = 0.0; uint32_t level = 0xFFFFFFFF; /* noise polynomial shifter */ }; void envelope_w(int ch); 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; int m_master_clock; }; DECLARE_DEVICE_TYPE(SAA1099, saa1099_device) #endif // MAME_SOUND_SAA1099_H