repos/blastem: psg.c annotate

annotate psg.c @ 2521:8cf7cadc17ee

Initial SC-3000 support

author	Michael Pavone <pavone@retrodev.com>
date	Fri, 11 Oct 2024 00:46:53 -0700
parents	f6213de4224c
children	7e1215d17571

rev	line source
467 140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING Mike Pavone <pavone@retrodev.com> parents: 410 diff changeset	1 /*
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING Mike Pavone <pavone@retrodev.com> parents: 410 diff changeset	2 Copyright 2013 Michael Pavone
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 diff changeset	3 This file is part of BlastEm.
467 140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING Mike Pavone <pavone@retrodev.com> parents: 410 diff changeset	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.
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING Mike Pavone <pavone@retrodev.com> parents: 410 diff changeset	5 */
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	6 #include "psg.h"
505 b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment. Michael Pavone <pavone@retrodev.com> parents: 483 diff changeset	7 #include "blastem.h"
1946 c3c62dbf1ceb WIP netplay support Michael Pavone <pavone@retrodev.com> parents: 1911 diff changeset	8 #include "event_log.h"
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	9 #include <string.h>
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	10 #include <stdlib.h>
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> parents: 522 diff changeset	11 #include <stdio.h>
964 e6dc30231b83 Fix PSG linear resampling and implement a low pass filter Michael Pavone <pavone@retrodev.com> parents: 963 diff changeset	12 #include <math.h>
1555 6ce36c3f250b More audio refactoring in preparation for allowing proper sync to video with dynamic audio rate control Michael Pavone <pavone@retrodev.com> parents: 1551 diff changeset	13 void psg_init(psg_context * context, uint32_t master_clock, uint32_t clock_div)
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	14 {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	15 memset(context, 0, sizeof(*context));
2196 2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	16 context->audio = render_audio_source("PSG", master_clock, clock_div, 2);
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. Mike Pavone <pavone@retrodev.com> parents: 364 diff changeset	17 context->clock_inc = clock_div;
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	18 for (int i = 0; i < 4; i++) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	19 context->volume[i] = 0xF;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	20 }
2196 2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	21 context->pan = 0xFF;
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	22 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	23
2255 74112041b2c7 Proper calculation of sample rate for YM2612/PSG oscilloscope view Michael Pavone <pavone@retrodev.com> parents: 2246 diff changeset	24 void psg_enable_scope(psg_context context, oscilloscope scope, uint32_t master_clock)
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	25 {
2302 0343f0d5add0 Fix libretro build for real Michael Pavone <pavone@retrodev.com> parents: 2255 diff changeset	26 #ifndef IS_LIB
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	27 context->scope = scope;
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	28 static const char *names[] = {
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	29 "PSG #1",
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	30 "PSG #2",
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	31 "PSG #3",
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	32 "PSG Noise",
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	33 };
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	34 for (int i = 0; i < 4; i++)
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	35 {
2255 74112041b2c7 Proper calculation of sample rate for YM2612/PSG oscilloscope view Michael Pavone <pavone@retrodev.com> parents: 2246 diff changeset	36 context->scope_channel[i] = scope_add_channel(scope, names[i], master_clock / context->clock_inc);
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	37 }
2302 0343f0d5add0 Fix libretro build for real Michael Pavone <pavone@retrodev.com> parents: 2255 diff changeset	38 #endif
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	39 }
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	40
884 252dfd29831d Selecting a second game from the menu now works Michael Pavone <pavone@retrodev.com> parents: 843 diff changeset	41 void psg_free(psg_context *context)
252dfd29831d Selecting a second game from the menu now works Michael Pavone <pavone@retrodev.com> parents: 843 diff changeset	42 {
1551 ce1f93be0104 Small cleanup to audio interface between emulation code and renderer backend Michael Pavone <pavone@retrodev.com> parents: 1451 diff changeset	43 render_free_source(context->audio);
884 252dfd29831d Selecting a second game from the menu now works Michael Pavone <pavone@retrodev.com> parents: 843 diff changeset	44 free(context);
252dfd29831d Selecting a second game from the menu now works Michael Pavone <pavone@retrodev.com> parents: 843 diff changeset	45 }
252dfd29831d Selecting a second game from the menu now works Michael Pavone <pavone@retrodev.com> parents: 843 diff changeset	46
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 diff changeset	47 void psg_adjust_master_clock(psg_context * context, uint32_t master_clock)
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 diff changeset	48 {
1555 6ce36c3f250b More audio refactoring in preparation for allowing proper sync to video with dynamic audio rate control Michael Pavone <pavone@retrodev.com> parents: 1551 diff changeset	49 render_audio_adjust_clock(context->audio, master_clock, context->clock_inc);
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 diff changeset	50 }
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 diff changeset	51
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	52 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> parents: diff changeset	53 {
1909 508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	54 if (context->vgm) {
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	55 vgm_sn76489_write(context->vgm, context->cycles, value);
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	56 }
1946 c3c62dbf1ceb WIP netplay support Michael Pavone <pavone@retrodev.com> parents: 1911 diff changeset	57 event_log(EVENT_PSG_REG, context->cycles, sizeof(value), &value);
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	58 if (value & 0x80) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	59 context->latch = value & 0x70;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	60 uint8_t channel = value >> 5 & 0x3;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	61 if (value & 0x10) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	62 context->volume[channel] = value & 0xF;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	63 } else {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	64 if (channel == 3) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	65 switch(value & 0x3)
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	66 {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	67 case 0:
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	68 case 1:
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	69 case 2:
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	70 context->counter_load[3] = 0x10 << (value & 0x3);
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	71 context->noise_use_tone = 0;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	72 break;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	73 default:
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	74 context->counter_load[3] = context->counter_load[2];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	75 context->noise_use_tone = 1;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	76 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	77 context->noise_type = value & 0x4;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	78 context->lsfr = 0x8000;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	79 } else {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	80 context->counter_load[channel] = (context->counter_load[channel] & 0x3F0) \| (value & 0xF);
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	81 if (channel == 2 && context->noise_use_tone) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	82 context->counter_load[3] = context->counter_load[2];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	83 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	84 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	85 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	86 } else {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	87 if (!(context->latch & 0x10)) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	88 uint8_t channel = context->latch >> 5 & 0x3;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	89 if (channel != 3) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	90 context->counter_load[channel] = (value << 4 & 0x3F0) \| (context->counter_load[channel] & 0xF);
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	91 if (channel == 2 && context->noise_use_tone) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	92 context->counter_load[3] = context->counter_load[2];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	93 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	94 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	95 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	96 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	97 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	98
522 6a14c5a95648 Adjust PSG and YM-2612 volume to be closer to the real console Michael Pavone <pavone@retrodev.com> parents: 505 diff changeset	99 #define PSG_VOL_DIV 14
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	100
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	101 //table shamelessly swiped from PSG doc from smspower.org
1102 c15896605bf2 Clean up symbol visiblity and delete a ltitle bit of dead code Michael Pavone <pavone@retrodev.com> parents: 1002 diff changeset	102 static int16_t volume_table[16] = {
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	103 32767/PSG_VOL_DIV, 26028/PSG_VOL_DIV, 20675/PSG_VOL_DIV, 16422/PSG_VOL_DIV, 13045/PSG_VOL_DIV, 10362/PSG_VOL_DIV,
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 diff changeset	104 8231/PSG_VOL_DIV, 6568/PSG_VOL_DIV, 5193/PSG_VOL_DIV, 4125/PSG_VOL_DIV, 3277/PSG_VOL_DIV, 2603/PSG_VOL_DIV,
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	105 2067/PSG_VOL_DIV, 1642/PSG_VOL_DIV, 1304/PSG_VOL_DIV, 0
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	106 };
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	107
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	108 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> parents: diff changeset	109 {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	110 while (context->cycles < cycles) {
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	111 uint8_t trigger[4] = {0,0,0,0};
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	112 for (int i = 0; i < 4; i++) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	113 if (context->counters[i]) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	114 context->counters[i] -= 1;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	115 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	116 if (!context->counters[i]) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	117 context->counters[i] = context->counter_load[i];
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	118 context->output_state[i] = !context->output_state[i];
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	119 trigger[i] = context->output_state[i];
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	120 if (i == 3 && context->output_state[i]) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	121 context->noise_out = context->lsfr & 1;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	122 context->lsfr = (context->lsfr >> 1) \| (context->lsfr << 15);
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	123 if (context->noise_type) {
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	124 //white noise
2212 71b0cb7c34a6 Fix PSG white noise LSFR tap Michael Pavone <pavone@retrodev.com> parents: 2196 diff changeset	125 if (context->lsfr & 0x4) {
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	126 context->lsfr ^= 0x8000;
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	127 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	128 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	129 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	130 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	131 }
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> parents: 522 diff changeset	132
2196 2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	133 int16_t left_accum = 0, right_accum = 0;
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	134 uint8_t pan_left = 0x10, pan_right = 0x1;
2081 cfd53c94fffb Initial stab at RF5C164 emulation Michael Pavone <pavone@retrodev.com> parents: 1946 diff changeset	135
2246 0e927fce8941 Fix bug in PSG oscilloscope output Michael Pavone <pavone@retrodev.com> parents: 2243 diff changeset	136 int16_t value;
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> parents: 522 diff changeset	137 for (int i = 0; i < 3; i++) {
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> parents: 522 diff changeset	138 if (context->output_state[i]) {
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	139 value = volume_table[context->volume[i]];
2196 2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	140 if (context->pan & pan_left) {
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	141 left_accum += value;
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	142 }
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	143 if (context->pan & pan_right) {
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	144 right_accum += value;
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	145 }
2246 0e927fce8941 Fix bug in PSG oscilloscope output Michael Pavone <pavone@retrodev.com> parents: 2243 diff changeset	146 } else {
0e927fce8941 Fix bug in PSG oscilloscope output Michael Pavone <pavone@retrodev.com> parents: 2243 diff changeset	147 value = 0;
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> parents: 522 diff changeset	148 }
2373 f6213de4224c Fix psg panning implementation Michael Pavone <pavone@retrodev.com> parents: 2302 diff changeset	149 pan_left <<= 1;
f6213de4224c Fix psg panning implementation Michael Pavone <pavone@retrodev.com> parents: 2302 diff changeset	150 pan_right <<= 1;
2302 0343f0d5add0 Fix libretro build for real Michael Pavone <pavone@retrodev.com> parents: 2255 diff changeset	151 #ifndef IS_LIB
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	152 if (context->scope) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	153 scope_add_sample(context->scope, context->scope_channel[i], value, trigger[i]);
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	154 }
2302 0343f0d5add0 Fix libretro build for real Michael Pavone <pavone@retrodev.com> parents: 2255 diff changeset	155 #endif
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> parents: 522 diff changeset	156 }
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	157 value = 0;
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> parents: 522 diff changeset	158 if (context->noise_out) {
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	159 value = volume_table[context->volume[3]];
2196 2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	160 if (context->pan & pan_left) {
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	161 left_accum += value;
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	162 }
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	163 if (context->pan & pan_right) {
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	164 right_accum += value;
2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	165 }
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> parents: 522 diff changeset	166 }
2302 0343f0d5add0 Fix libretro build for real Michael Pavone <pavone@retrodev.com> parents: 2255 diff changeset	167 #ifndef IS_LIB
2243 0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	168 if (context->scope) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	169 scope_add_sample(context->scope, context->scope_channel[3], value, trigger[3]);
0d1d5dccdd28 Initial implementation of oscilloscope debug view Michael Pavone <pavone@retrodev.com> parents: 2212 diff changeset	170 }
2302 0343f0d5add0 Fix libretro build for real Michael Pavone <pavone@retrodev.com> parents: 2255 diff changeset	171 #endif
2081 cfd53c94fffb Initial stab at RF5C164 emulation Michael Pavone <pavone@retrodev.com> parents: 1946 diff changeset	172
2196 2648081f3100 Implement Game Gear PSG panning Michael Pavone <pavone@retrodev.com> parents: 2081 diff changeset	173 render_put_stereo_sample(context->audio, left_accum, right_accum);
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> parents: 522 diff changeset	174
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. Mike Pavone <pavone@retrodev.com> parents: 364 diff changeset	175 context->cycles += context->clock_inc;
354 15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	176 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	177 }
15dd6418fe67 Initial PSG support. Mostly works, noise channel is borked though. Mike Pavone <pavone@retrodev.com> parents: diff changeset	178
1909 508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	179 void psg_vgm_log(psg_context context, uint32_t master_clock, vgm_writer vgm)
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	180 {
1911 f2ed8df7a002 Fix PSG frequency written to VGM header when logging Michael Pavone <pavone@retrodev.com> parents: 1909 diff changeset	181 vgm_sn76489_init(vgm, 16 * master_clock / context->clock_inc, 9, 16, 0);
1909 508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	182 context->vgm = vgm;
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	183 for (int chan = 0; chan < 4; chan++)
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	184 {
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	185 uint8_t base = chan << 5 \| 0x80;
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	186 vgm_sn76489_write(context->vgm, context->cycles, context->volume[chan] \| base \| 0x10);
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	187 if (chan == 3) {
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	188 if (context->noise_use_tone) {
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	189 vgm_sn76489_write(context->vgm, context->cycles, 3 \| base);
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	190 } else {
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	191 //0x10 = 0
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	192 //0x20 = 1
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	193 //0x40 = 2
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	194 vgm_sn76489_write(context->vgm, context->cycles, context->counter_load[chan] >> 5 \| base);
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	195 }
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	196 } else {
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	197 vgm_sn76489_write(context->vgm, context->cycles, (context->counter_load[chan] & 0xF) \| base);
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	198 vgm_sn76489_write(context->vgm, context->cycles, context->counter_load[chan] >> 4 & 0x3F);
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	199 }
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	200 }
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	201 }
508522f08e4d Initial stab at VGM logging support Michael Pavone <pavone@retrodev.com> parents: 1865 diff changeset	202
1427 4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	203 void psg_serialize(psg_context context, serialize_buffer buf)
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	204 {
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	205 save_int16(buf, context->lsfr);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	206 save_buffer16(buf, context->counter_load, 4);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	207 save_buffer16(buf, context->counters, 4);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	208 save_buffer8(buf, context->volume, 4);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	209 uint8_t output_state = context->output_state[0] << 3 \| context->output_state[1] << 2
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	210 \| context->output_state[2] << 1 \| context->output_state[3]
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	211 \| context->noise_use_tone << 4;
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	212 save_int8(buf, output_state);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	213 save_int8(buf, context->noise_type);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	214 save_int8(buf, context->latch);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	215 save_int32(buf, context->cycles);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	216 }
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	217
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	218 void psg_deserialize(deserialize_buffer buf, void vcontext)
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	219 {
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	220 psg_context *context = vcontext;
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	221 context->lsfr = load_int16(buf);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	222 load_buffer16(buf, context->counter_load, 4);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	223 load_buffer16(buf, context->counters, 4);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	224 load_buffer8(buf, context->volume, 4);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	225 uint8_t output_state = load_int8(buf);
1451 9c65819afec3 Fix operator precedence in psg serialize/deserialize Michael Pavone <pavone@retrodev.com> parents: 1427 diff changeset	226 context->output_state[0] = output_state >> 3 & 1;
9c65819afec3 Fix operator precedence in psg serialize/deserialize Michael Pavone <pavone@retrodev.com> parents: 1427 diff changeset	227 context->output_state[1] = output_state >> 2 & 1;
9c65819afec3 Fix operator precedence in psg serialize/deserialize Michael Pavone <pavone@retrodev.com> parents: 1427 diff changeset	228 context->output_state[2] = output_state >> 1 & 1;
1427 4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	229 context->output_state[3] = output_state & 1;
1451 9c65819afec3 Fix operator precedence in psg serialize/deserialize Michael Pavone <pavone@retrodev.com> parents: 1427 diff changeset	230 context->noise_use_tone = output_state >> 4 & 1;
1427 4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	231 context->noise_type = load_int8(buf);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	232 context->latch = load_int8(buf);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	233 context->cycles = load_int32(buf);
4e5797b3935a WIP - New savestate format Michael Pavone <pavone@retrodev.com> parents: 1356 diff changeset	234 }

Mercurial > repos > blastem

annotate psg.c @ 2521:8cf7cadc17ee