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PC speaker: use evdev instead of KIOCSOUND

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still unsupported
This commit is contained in:
tildearrow 2022-03-06 03:33:56 -05:00
parent c34b8325c9
commit 86a71cc6a2
2 changed files with 36 additions and 8 deletions
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40
src/engine/platform/pcspkr.cpp
View file

@ -19,10 +19,13 @@
#include "pcspkr.h"
#include "../engine.h"
#include <linux/input.h>
#include <math.h>
#include <sys/select.h>
#ifdef __linux__
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/kd.h>
#endif
@ -112,14 +115,29 @@ void DivPlatformPCSpeaker::acquire_piezo(short* bufL, short* bufR, size_t start,
}
}
void DivPlatformPCSpeaker::acquire_real(short* bufL, short* bufR, size_t start, size_t len) {
void DivPlatformPCSpeaker::beepFreq(int freq) {
#ifdef __linux__
static struct input_event ie;
if (beepFD>=0) {
gettimeofday(&ie.time,NULL);
ie.type=EV_SND;
ie.code=SND_TONE;
ie.value=freq;
if (write(beepFD,&ie,sizeof(struct input_event))<0) {
perror("error while writing frequency!");
} else {
//printf("writing freq: %d\n",freq);
}
}
#endif
}
void DivPlatformPCSpeaker::acquire_real(short* bufL, short* bufR, size_t start, size_t len) {
if (lastOn!=on || lastFreq!=freq) {
lastOn=on;
lastFreq=freq;
ioctl(STDOUT_FILENO,KIOCSOUND,on?freq:0);
beepFreq((on && !isMuted[0])?freq:0);
}
#endif
for (size_t i=start; i<start+len; i++) {
bufL[i]=0;
}
@ -314,8 +332,14 @@ void DivPlatformPCSpeaker::reset() {
if (speakerType==3) {
#ifdef __linux__
ioctl(STDOUT_FILENO,KIOCSOUND,0);
if (beepFD==-1) {
beepFD=open("/dev/input/by-path/platform-pcspkr-event-spkr",O_WRONLY);
if (beepFD<0) {
perror("error while opening PC speaker");
}
}
#endif
beepFreq(0);
}
memset(regPool,0,2);
@ -349,6 +373,7 @@ int DivPlatformPCSpeaker::init(DivEngine* p, int channels, int sugRate, unsigned
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
beepFD=-1;
for (int i=0; i<1; i++) {
isMuted[i]=false;
}
@ -360,10 +385,11 @@ int DivPlatformPCSpeaker::init(DivEngine* p, int channels, int sugRate, unsigned
void DivPlatformPCSpeaker::quit() {
if (speakerType==3) {
#ifdef __linux__
ioctl(STDOUT_FILENO,KIOCSOUND,0);
#endif
beepFreq(0);
}
#ifdef __linux__
if (beepFD>=0) close(beepFD);
#endif
}
DivPlatformPCSpeaker::~DivPlatformPCSpeaker() {

4
src/engine/platform/pcspkr.h
View file

@ -53,7 +53,7 @@ class DivPlatformPCSpeaker: public DivDispatch {
Channel chan[1];
bool isMuted[1];
bool on, flip, lastOn;
int pos, speakerType;
int pos, speakerType, beepFD;
float low, band;
float low2, high2, band2;
float low3, band3;
@ -62,6 +62,8 @@ class DivPlatformPCSpeaker: public DivDispatch {
friend void putDispatchChan(void*,int,int);
void beepFreq(int freq);
void acquire_unfilt(short* bufL, short* bufR, size_t start, size_t len);
void acquire_cone(short* bufL, short* bufR, size_t start, size_t len);
void acquire_piezo(short* bufL, short* bufR, size_t start, size_t len);