mirror of
https://github.com/mpv-player/mpv
synced 2024-12-20 22:02:59 +00:00
8838b4afa6
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10398 b3059339-0415-0410-9bf9-f77b7e298cf2
165 lines
3.9 KiB
C
165 lines
3.9 KiB
C
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#include "../config.h"
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#ifdef HAVE_JOYSTICK
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#include "joystick.h"
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#include "input.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#ifndef JOY_AXIS_DELTA
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#define JOY_AXIS_DELTA 500
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#endif
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#ifndef JS_DEV
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#define JS_DEV "/dev/input/js0"
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#endif
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#ifdef TARGET_LINUX
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#include <linux/joystick.h>
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int axis[10];
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int btns = 0;
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int mp_input_joystick_init(char* dev) {
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int fd,l=0;
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int inited = 0;
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struct js_event ev;
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printf("Opening joystick device %s\n",dev ? dev : JS_DEV);
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fd = open( dev ? dev : JS_DEV , O_RDONLY | O_NONBLOCK );
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if(fd < 0) {
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printf("Can't open joystick device %s : %s\n",dev ? dev : JS_DEV,strerror(errno));
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return -1;
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}
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while(! inited) {
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l = 0;
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while((unsigned int)l < sizeof(struct js_event)) {
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int r = read(fd,((char*)&ev)+l,sizeof(struct js_event)-l);
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if(r < 0) {
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if(errno == EINTR)
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continue;
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else if(errno == EAGAIN) {
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inited = 1;
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break;
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}
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printf("Error while reading joystick device : %s\n",strerror(errno));
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close(fd);
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return -1;
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}
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l += r;
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}
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if((unsigned int)l < sizeof(struct js_event)) {
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if(l > 0)
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printf("Joystick : we loose %d bytes of data\n",l);
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break;
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}
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ev.type &= ~JS_EVENT_INIT;
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if(ev.type == JS_EVENT_BUTTON)
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btns |= (ev.value << ev.number);
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if(ev.type == JS_EVENT_AXIS)
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axis[ev.number] = ev.value;
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}
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return fd;
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}
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int mp_input_joystick_read(int fd) {
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struct js_event ev;
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int l=0;
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while((unsigned int)l < sizeof(struct js_event)) {
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int r = read(fd,&ev+l,sizeof(struct js_event)-l);
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if(r <= 0) {
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if(errno == EINTR)
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continue;
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else if(errno == EAGAIN)
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return MP_INPUT_NOTHING;
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if( r < 0)
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printf("Joystick error while reading joystick device : %s\n",strerror(errno));
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else
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printf("Joystick error while reading joystick device : EOF\n");
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return MP_INPUT_DEAD;
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}
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l += r;
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}
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if((unsigned int)l < sizeof(struct js_event)) {
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if(l > 0)
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printf("Joystick : we loose %d bytes of data\n",l);
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return MP_INPUT_NOTHING;
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}
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if(ev.type & JS_EVENT_INIT) {
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printf("Joystick : warning init event, we have lost sync with driver\n");
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ev.type &= ~JS_EVENT_INIT;
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if(ev.type == JS_EVENT_BUTTON) {
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int s = (btns >> ev.number) & 1;
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if(s == ev.value) // State is the same : ignore
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return MP_INPUT_NOTHING;
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}
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if(ev.type == JS_EVENT_AXIS) {
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if( ( axis[ev.number] == 1 && ev.value > JOY_AXIS_DELTA) ||
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(axis[ev.number] == -1 && ev.value < -JOY_AXIS_DELTA) ||
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(axis[ev.number] == 0 && ev.value >= -JOY_AXIS_DELTA && ev.value <= JOY_AXIS_DELTA)
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) // State is the same : ignore
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return MP_INPUT_NOTHING;
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}
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}
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if(ev.type & JS_EVENT_BUTTON) {
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btns &= ~(1 << ev.number);
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btns |= (ev.value << ev.number);
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if(ev.value == 1)
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return ((JOY_BTN0+ev.number) | MP_KEY_DOWN);
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else
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return (JOY_BTN0+ev.number);
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} else if(ev.type & JS_EVENT_AXIS) {
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if(ev.value < -JOY_AXIS_DELTA && axis[ev.number] != -1) {
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axis[ev.number] = -1;
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return (JOY_AXIS0_MINUS+(2*ev.number)) | MP_KEY_DOWN;
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} else if(ev.value > JOY_AXIS_DELTA && axis[ev.number] != 1) {
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axis[ev.number] = 1;
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return (JOY_AXIS0_PLUS+(2*ev.number)) | MP_KEY_DOWN;
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} else if(ev.value <= JOY_AXIS_DELTA && ev.value >= -JOY_AXIS_DELTA && axis[ev.number] != 0) {
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int r = axis[ev.number] == 1 ? JOY_AXIS0_PLUS+(2*ev.number) : JOY_AXIS0_MINUS+(2*ev.number);
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axis[ev.number] = 0;
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return r;
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} else
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return MP_INPUT_NOTHING;
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} else {
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printf("Joystick warning unknown event type %d\n",ev.type);
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return MP_INPUT_ERROR;
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}
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return MP_INPUT_NOTHING;
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}
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#else
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// dummy function
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int mp_input_joystick_init(char* dev) {
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return -1;
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}
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int mp_input_joystick_read(int fd) {
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return MP_INPUT_NOTHING;
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}
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#endif
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#endif
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