annotate psg.h @ 1019:e34334e6c682

Fix GST savestate loading to deal with SAT cache to fix sprite corruption on savestate load. Clear out Z80 native_pc so the Z80 state does not get hosed when loading a savestate while the emulator is already running
author Michael Pavone <pavone@retrodev.com>
date Mon, 02 May 2016 23:08:20 -0700
parents 8d032a368dd5
children 4e5797b3935a
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1 /*
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2 Copyright 2013 Michael Pavone
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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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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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13 int16_t *back_buffer;
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14 uint64_t buffer_fraction;
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15 uint64_t buffer_inc;
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16 uint32_t buffer_pos;
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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;
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19 uint32_t sample_rate;
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20 uint32_t samples_frame;
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e6dc30231b83 Fix PSG linear resampling and implement a low pass filter
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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];
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25 int16_t accum;
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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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30 uint8_t noise_use_tone;
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31 uint8_t noise_type;
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32 uint8_t latch;
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33 } psg_context;
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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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37 void psg_free(psg_context *context);
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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);
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40 void psg_run(psg_context * context, uint32_t cycles);
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41
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42 #endif //PSG_CONTEXT_H_
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43