Mercurial > repos > blastem
annotate psg.h @ 1269:ff8e29eeb1ec
Render horizontal border in H32 mode as well. Both modes still need some minor work to deal with inactive/active transition
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 06 Mar 2017 09:54:44 -0800 |
parents | 8d032a368dd5 |
children | 4e5797b3935a |
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Added copyright notice to source files and added GPL license text in COPYING
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1 /* |
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2 Copyright 2013 Michael Pavone |
483
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Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
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3 This file is part of BlastEm. |
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
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5 */ |
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Initial PSG support. Mostly works, noise channel is borked though.
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6 #ifndef PSG_CONTEXT_H_ |
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7 #define PSG_CONTEXT_H_ |
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8 |
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9 #include <stdint.h> |
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10 |
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11 typedef struct { |
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12 int16_t *audio_buffer; |
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Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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13 int16_t *back_buffer; |
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Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
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14 uint64_t buffer_fraction; |
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Mike Pavone <pavone@retrodev.com>
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15 uint64_t buffer_inc; |
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16 uint32_t buffer_pos; |
380
1c8d74f2ab0b
Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
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17 uint32_t clock_inc; |
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18 uint32_t cycles; |
483
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
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467
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19 uint32_t sample_rate; |
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20 uint32_t samples_frame; |
964
e6dc30231b83
Fix PSG linear resampling and implement a low pass filter
Michael Pavone <pavone@retrodev.com>
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21 int32_t lowpass_alpha; |
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22 uint16_t lsfr; |
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23 uint16_t counter_load[4]; |
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24 uint16_t counters[4]; |
838
9a5dc22297f2
Somewhat better handling of high frequency PSG tones. Needs work to fully handle case where frequency > half our output sample rate
Michael Pavone <pavone@retrodev.com>
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25 int16_t accum; |
963
bd549b25c362
Not so successful attempt at improved PSG resampling
Michael Pavone <pavone@retrodev.com>
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26 int16_t last_sample; |
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27 uint8_t volume[4]; |
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28 uint8_t output_state[4]; |
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29 uint8_t noise_out; |
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Initial PSG support. Mostly works, noise channel is borked though.
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30 uint8_t noise_use_tone; |
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Initial PSG support. Mostly works, noise channel is borked though.
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31 uint8_t noise_type; |
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Initial PSG support. Mostly works, noise channel is borked though.
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32 uint8_t latch; |
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Initial PSG support. Mostly works, noise channel is borked though.
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33 } psg_context; |
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Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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34 |
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Initial PSG support. Mostly works, noise channel is borked though.
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35 |
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8d032a368dd5
Made low pass filter frequency configurable
Michael Pavone <pavone@retrodev.com>
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36 void psg_init(psg_context * context, uint32_t sample_rate, uint32_t master_clock, uint32_t clock_div, uint32_t samples_frame, uint32_t lowpass_cutoff); |
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252dfd29831d
Selecting a second game from the menu now works
Michael Pavone <pavone@retrodev.com>
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37 void psg_free(psg_context *context); |
483
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
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38 void psg_adjust_master_clock(psg_context * context, uint32_t master_clock); |
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39 void psg_write(psg_context * context, uint8_t value); |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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40 void psg_run(psg_context * context, uint32_t cycles); |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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41 |
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Initial PSG support. Mostly works, noise channel is borked though.
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42 #endif //PSG_CONTEXT_H_ |
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Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
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43 |