458 lines
11 KiB
C++
458 lines
11 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2022 tildearrow and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "pcspkr.h"
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#include "../engine.h"
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#include <math.h>
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#ifdef __linux__
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#include <sys/ioctl.h>
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#include <sys/select.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <linux/input.h>
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#include <linux/kd.h>
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#endif
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#define PCSPKR_DIVIDER 4
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#define CHIP_DIVIDER 1
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const char* regCheatSheetPCSpeaker[]={
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"Period", "0",
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NULL
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};
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const char** DivPlatformPCSpeaker::getRegisterSheet() {
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return regCheatSheetPCSpeaker;
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}
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const char* DivPlatformPCSpeaker::getEffectName(unsigned char effect) {
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return NULL;
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}
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const float cut=0.05;
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const float reso=0.06;
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void DivPlatformPCSpeaker::acquire_unfilt(short* bufL, short* bufR, size_t start, size_t len) {
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int out=0;
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for (size_t i=start; i<start+len; i++) {
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if (on) {
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pos-=PCSPKR_DIVIDER;
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if (pos>freq) pos=freq;
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while (pos<0) {
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if (freq<1) {
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pos=1;
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} else {
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pos+=freq;
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}
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}
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out=(pos>(freq>>1) && !isMuted[0])?32767:0;
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bufL[i]=out;
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oscBuf->data[oscBuf->needle++]=out;
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} else {
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bufL[i]=0;
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oscBuf->data[oscBuf->needle++]=0;
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}
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}
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}
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void DivPlatformPCSpeaker::acquire_cone(short* bufL, short* bufR, size_t start, size_t len) {
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for (size_t i=start; i<start+len; i++) {
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if (on) {
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pos-=PCSPKR_DIVIDER;
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if (pos>freq) pos=freq;
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while (pos<0) {
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if (freq<1) {
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pos=1;
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} else {
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pos+=freq;
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}
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}
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float next=(pos>((freq+16)>>1) && !isMuted[0])?1:0;
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low+=0.04*band;
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band+=0.04*(next-low-band);
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float out=(low+band)*0.75;
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if (out>1.0) out=1.0;
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if (out<-1.0) out=-1.0;
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bufL[i]=out*32767;
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oscBuf->data[oscBuf->needle++]=out*32767;
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} else {
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bufL[i]=0;
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oscBuf->data[oscBuf->needle++]=0;
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}
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}
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}
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void DivPlatformPCSpeaker::acquire_piezo(short* bufL, short* bufR, size_t start, size_t len) {
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for (size_t i=start; i<start+len; i++) {
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if (on) {
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pos-=PCSPKR_DIVIDER;
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if (pos>freq) pos=freq;
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while (pos<0) {
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if (freq<1) {
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pos=1;
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} else {
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pos+=freq;
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}
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}
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float next=(pos>((freq+64)>>1) && !isMuted[0])?1:0;
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low+=cut*band;
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band+=cut*(next-low-(reso*band));
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float out=band*0.15-(next-low)*0.06;
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if (out>1.0) out=1.0;
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if (out<-1.0) out=-1.0;
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bufL[i]=out*32767;
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oscBuf->data[oscBuf->needle++]=out*32767;
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} else {
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bufL[i]=0;
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oscBuf->data[oscBuf->needle++]=0;
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}
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}
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}
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void DivPlatformPCSpeaker::beepFreq(int freq) {
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#ifdef __linux__
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static struct input_event ie;
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if (beepFD>=0) {
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gettimeofday(&ie.time,NULL);
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ie.type=EV_SND;
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ie.code=SND_TONE;
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if (freq>0) {
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ie.value=chipClock/freq;
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} else {
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ie.value=0;
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}
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if (write(beepFD,&ie,sizeof(struct input_event))<0) {
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perror("error while writing frequency!");
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} else {
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//printf("writing freq: %d\n",freq);
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}
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}
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#endif
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}
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void DivPlatformPCSpeaker::acquire_real(short* bufL, short* bufR, size_t start, size_t len) {
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int out=0;
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if (lastOn!=on || lastFreq!=freq) {
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lastOn=on;
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lastFreq=freq;
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beepFreq((on && !isMuted[0])?freq:0);
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}
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for (size_t i=start; i<start+len; i++) {
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if (on) {
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pos-=PCSPKR_DIVIDER;
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if (pos>freq) pos=freq;
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while (pos<0) {
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if (freq<1) {
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pos=1;
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} else {
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pos+=freq;
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}
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}
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out=(pos>(freq>>1) && !isMuted[0])?32767:0;
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oscBuf->data[oscBuf->needle++]=out;
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} else {
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oscBuf->data[oscBuf->needle++]=0;
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}
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bufL[i]=0;
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}
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}
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void DivPlatformPCSpeaker::acquire(short* bufL, short* bufR, size_t start, size_t len) {
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switch (speakerType) {
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case 0:
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acquire_unfilt(bufL,bufR,start,len);
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break;
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case 1:
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acquire_cone(bufL,bufR,start,len);
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break;
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case 2:
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acquire_piezo(bufL,bufR,start,len);
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break;
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case 3:
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acquire_real(bufL,bufR,start,len);
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break;
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}
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}
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void DivPlatformPCSpeaker::tick(bool sysTick) {
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for (int i=0; i<1; i++) {
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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chan[i].outVol=(chan[i].vol && chan[i].std.vol.val);
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on=chan[i].outVol;
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}
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if (chan[i].std.arp.had) {
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if (!chan[i].inPorta) {
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if (chan[i].std.arp.mode) {
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chan[i].baseFreq=NOTE_PERIODIC(chan[i].std.arp.val);
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} else {
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chan[i].baseFreq=NOTE_PERIODIC(chan[i].note+chan[i].std.arp.val);
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}
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}
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chan[i].freqChanged=true;
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} else {
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if (chan[i].std.arp.mode && chan[i].std.arp.finished) {
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chan[i].baseFreq=NOTE_PERIODIC(chan[i].note);
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chan[i].freqChanged=true;
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}
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}
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if (chan[i].std.pitch.had) {
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if (chan[i].std.pitch.mode) {
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chan[i].pitch2+=chan[i].std.pitch.val;
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CLAMP_VAR(chan[i].pitch2,-32768,32767);
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} else {
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chan[i].pitch2=chan[i].std.pitch.val;
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER)-1;
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if (chan[i].freq<0) chan[i].freq=0;
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if (chan[i].freq>65535) chan[i].freq=65535;
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if (chan[i].keyOn) {
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on=true;
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}
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if (chan[i].keyOff) {
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on=false;
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}
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freq=chan[i].freq;
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if (chan[i].keyOn) chan[i].keyOn=false;
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if (chan[i].keyOff) chan[i].keyOff=false;
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chan[i].freqChanged=false;
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}
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}
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}
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int DivPlatformPCSpeaker::dispatch(DivCommand c) {
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switch (c.cmd) {
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case DIV_CMD_NOTE_ON:
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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}
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_BEEPER));
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break;
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case DIV_CMD_NOTE_OFF:
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chan[c.chan].active=false;
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chan[c.chan].keyOff=true;
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chan[c.chan].macroInit(NULL);
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break;
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case DIV_CMD_NOTE_OFF_ENV:
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case DIV_CMD_ENV_RELEASE:
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chan[c.chan].std.release();
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break;
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case DIV_CMD_INSTRUMENT:
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if (chan[c.chan].ins!=c.value || c.value2==1) {
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chan[c.chan].ins=c.value;
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}
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break;
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case DIV_CMD_VOLUME:
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if (chan[c.chan].vol!=c.value) {
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chan[c.chan].vol=c.value;
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if (!chan[c.chan].std.vol.has) {
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chan[c.chan].outVol=c.value;
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}
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if (chan[c.chan].active) {
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on=chan[c.chan].vol;
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}
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}
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break;
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case DIV_CMD_GET_VOLUME:
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return chan[c.chan].vol;
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break;
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case DIV_CMD_PITCH:
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chan[c.chan].pitch=c.value;
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chan[c.chan].freqChanged=true;
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break;
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=NOTE_PERIODIC(c.value2);
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bool return2=false;
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if (destFreq>chan[c.chan].baseFreq) {
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chan[c.chan].baseFreq+=c.value;
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if (chan[c.chan].baseFreq>=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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} else {
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chan[c.chan].baseFreq-=c.value;
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if (chan[c.chan].baseFreq<=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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}
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chan[c.chan].freqChanged=true;
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if (return2) {
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chan[c.chan].inPorta=false;
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return 2;
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}
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break;
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}
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case DIV_CMD_LEGATO:
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if (c.chan==3) break;
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+((chan[c.chan].std.arp.will && !chan[c.chan].std.arp.mode)?(chan[c.chan].std.arp.val):(0)));
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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break;
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case DIV_CMD_PRE_PORTA:
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if (chan[c.chan].active && c.value2) {
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if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_BEEPER));
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}
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chan[c.chan].inPorta=c.value;
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break;
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case DIV_CMD_GET_VOLMAX:
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return 1;
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break;
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case DIV_ALWAYS_SET_VOLUME:
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return 1;
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break;
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default:
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break;
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}
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return 1;
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}
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void DivPlatformPCSpeaker::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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}
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void DivPlatformPCSpeaker::forceIns() {
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for (int i=0; i<1; i++) {
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chan[i].insChanged=true;
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}
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}
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void* DivPlatformPCSpeaker::getChanState(int ch) {
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return &chan[ch];
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}
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DivDispatchOscBuffer* DivPlatformPCSpeaker::getOscBuffer(int ch) {
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return oscBuf;
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}
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unsigned char* DivPlatformPCSpeaker::getRegisterPool() {
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if (on) {
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regPool[0]=freq;
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regPool[1]=freq>>8;
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} else {
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regPool[0]=0;
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regPool[1]=0;
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}
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return regPool;
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}
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int DivPlatformPCSpeaker::getRegisterPoolSize() {
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return 2;
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}
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void DivPlatformPCSpeaker::reset() {
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for (int i=0; i<1; i++) {
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chan[i]=DivPlatformPCSpeaker::Channel();
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chan[i].std.setEngine(parent);
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}
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if (dumpWrites) {
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addWrite(0xffffffff,0);
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}
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on=false;
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lastOn=false;
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freq=0;
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lastFreq=0;
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pos=0;
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flip=false;
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low=0;
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band=0;
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if (speakerType==3) {
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#ifdef __linux__
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if (beepFD==-1) {
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beepFD=open("/dev/input/by-path/platform-pcspkr-event-spkr",O_WRONLY);
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if (beepFD<0) {
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perror("error while opening PC speaker");
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}
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}
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#endif
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beepFreq(0);
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} else {
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beepFreq(0);
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}
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memset(regPool,0,2);
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}
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bool DivPlatformPCSpeaker::keyOffAffectsArp(int ch) {
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return true;
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}
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void DivPlatformPCSpeaker::setFlags(unsigned int flags) {
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chipClock=COLOR_NTSC/3.0;
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rate=chipClock/PCSPKR_DIVIDER;
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speakerType=flags&3;
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oscBuf->rate=rate;
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}
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void DivPlatformPCSpeaker::notifyInsDeletion(void* ins) {
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for (int i=0; i<1; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformPCSpeaker::notifyPlaybackStop() {
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beepFreq(0);
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}
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void DivPlatformPCSpeaker::poke(unsigned int addr, unsigned short val) {
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// ???
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}
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void DivPlatformPCSpeaker::poke(std::vector<DivRegWrite>& wlist) {
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// ???
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}
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int DivPlatformPCSpeaker::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
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parent=p;
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dumpWrites=false;
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skipRegisterWrites=false;
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beepFD=-1;
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for (int i=0; i<1; i++) {
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isMuted[i]=false;
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}
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oscBuf=new DivDispatchOscBuffer;
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setFlags(flags);
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reset();
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return 5;
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}
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void DivPlatformPCSpeaker::quit() {
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if (speakerType==3) {
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beepFreq(0);
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}
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#ifdef __linux__
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if (beepFD>=0) close(beepFD);
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#endif
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delete oscBuf;
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}
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DivPlatformPCSpeaker::~DivPlatformPCSpeaker() {
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}
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