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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 716 | lvd | 1 | #pragma once |
| 2 | |||
| 3 | #ifndef __SAA1099_H__ |
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| 4 | #define __SAA1099_H__ |
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| 5 | |||
| 6 | #include "../sysdefs.h" |
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| 7 | #include "sndrender.h" |
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| 8 | |||
| 9 | /********************************************** |
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| 10 | Philips SAA1099 Sound driver |
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| 11 | **********************************************/ |
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| 12 | /* this structure defines a channel */ |
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| 13 | struct saa1099_channel |
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| 14 | { |
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| 15 | int frequency; /* frequency (0x00..0xff) */ |
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| 16 | int freq_enable; /* frequency enable */ |
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| 17 | int noise_enable; /* noise enable */ |
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| 18 | int octave; /* octave (0x00..0x07) */ |
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| 19 | int amplitude[2]; /* value from amplitude lookup table */ |
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| 20 | int amp[2]; /* amplitude (0x00..0x0f) */ |
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| 21 | int envelope[2]; /* envelope (0x00..0x0f or 0x10 == off) */ |
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| 22 | |||
| 23 | /* vars to simulate the square wave */ |
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| 24 | double counter; |
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| 25 | double freq; |
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| 26 | int level; |
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| 27 | }; |
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| 28 | |||
| 29 | /* this structure defines a noise channel */ |
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| 30 | struct saa1099_noise |
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| 31 | { |
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| 32 | /* vars to simulate the noise generator output */ |
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| 33 | double counter; |
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| 34 | double freq; |
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| 35 | int level; /* noise polynomal shifter */ |
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| 36 | }; |
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| 37 | |||
| 38 | /* this structure defines a SAA1099 chip */ |
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| 39 | struct saa1099_state |
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| 40 | { |
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| 41 | // running_device *device; |
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| 42 | // sound_stream * stream; /* our stream */ |
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| 43 | int noise_params[2]; /* noise generators parameters */ |
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| 44 | int env_enable[2]; /* envelope generators enable */ |
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| 45 | int env_reverse_right[2]; /* envelope reversed for right channel */ |
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| 46 | int env_reverse_right_buf[2]; /* envelope reversed for right channel buffered value */ |
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| 47 | int env_mode[2]; /* envelope generators mode */ |
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| 48 | int env_mode_buf[2]; /* envelope generators mode buffered value */ |
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| 49 | int env_bits[2]; /* non zero = 3 bits resolution */ |
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| 50 | int env_clock[2]; /* envelope clock mode (non-zero external) */ |
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| 51 | int env_clock_buf[2]; /* envelope clock mode (non-zero external) buffered value */ |
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| 52 | int env_step[2]; /* current envelope step */ |
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| 53 | bool env_upd[2]; // true if buffered data present |
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| 54 | int all_ch_enable; /* all channels enable */ |
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| 55 | int sync_state; /* sync all channels */ |
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| 56 | int selected_reg; /* selected register */ |
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| 57 | saa1099_channel channels[6]; /* channels */ |
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| 58 | saa1099_noise noise[2]; /* noise generators */ |
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| 59 | double sample_rate; |
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| 60 | }; |
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| 61 | |||
| 62 | // 8MHz in sam coupe |
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| 63 | class TSaa1099 : public saa1099_state, public SNDRENDER |
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| 64 | { |
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| 65 | private: |
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| 66 | unsigned chip_clock_rate; |
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| 67 | unsigned system_clock_rate; |
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| 68 | uint64_t passed_chip_ticks; |
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| 69 | uint64_t passed_clk_ticks; |
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| 70 | |||
| 71 | unsigned t; |
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| 72 | public: |
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| 73 | TSaa1099(); |
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| 74 | |||
| 75 | void set_timings(unsigned system_clock_rate, unsigned chip_clock_rate, unsigned sample_rate); |
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| 76 | void reset(unsigned TimeStamp = 0); |
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| 77 | |||
| 78 | // set of functions that fills buffer in emulation progress |
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| 79 | void start_frame() { SNDRENDER::start_frame(); } |
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| 80 | void start_frame(bufptr_t dst); |
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| 81 | unsigned end_frame(unsigned clk_ticks); |
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| 82 | void WrCtl(u8 Val); |
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| 83 | void WrData(unsigned TimeStamp, u8 Val); |
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| 84 | private: |
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| 85 | void update(unsigned TimeStamp); |
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| 86 | void flush(unsigned chiptick); |
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| 87 | }; |
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| 88 | |||
| 89 | extern TSaa1099 Saa1099; |
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| 90 | |||
| 91 | //void saa1099_control_w(ATTR_UNUSED device_t *device, ATTR_UNUSED offs_t offset, ATTR_UNUSED UINT8 data); |
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| 92 | //void saa1099_data_w(ATTR_UNUSED device_t *device, ATTR_UNUSED offs_t offset, ATTR_UNUSED UINT8 data); |
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| 93 | |||
| 94 | #endif /* __SAA1099_H__ */ |