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annotate psg.h @ 355:fcd31d19dddd

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Fix clipping in PSG core
author Mike Pavone <pavone@retrodev.com>
date Thu, 23 May 2013 23:51:49 -0700
parents 15dd6418fe67
children 62177cc39049
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
354
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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1 #ifndef PSG_CONTEXT_H_
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2 #define PSG_CONTEXT_H_
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3
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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4 #include <stdint.h>
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5
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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6 typedef struct {
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7 int16_t *audio_buffer;
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Mike Pavone <pavone@retrodev.com>
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8 int16_t *back_buffer;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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9 double buffer_fraction;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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10 double buffer_inc;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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11 uint32_t buffer_pos;
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Mike Pavone <pavone@retrodev.com>
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12 uint32_t back_pos;
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Mike Pavone <pavone@retrodev.com>
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13 uint32_t cycles;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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14 uint32_t samples_frame;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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15 uint16_t lsfr;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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16 uint16_t counter_load[4];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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17 uint16_t counters[4];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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18 uint8_t volume[4];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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19 uint8_t output_state[4];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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20 uint8_t noise_out;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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21 uint8_t noise_use_tone;
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22 uint8_t noise_type;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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23 uint8_t latch;
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24 } psg_context;
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25
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26
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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27 void psg_init(psg_context * context, uint32_t sample_rate, uint32_t clock_rate, uint32_t samples_frame);
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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28 void psg_write(psg_context * context, uint8_t value);
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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29 void psg_run(psg_context * context, uint32_t cycles);
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30
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though.
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31 #endif //PSG_CONTEXT_H_
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32