SDL_sysjoystick.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:8k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@devolution.com
- */
- /*
- * Joystick driver for the uhid(4) interface found in OpenBSD,
- * NetBSD and FreeBSD.
- *
- * Maintainer: <vedge at csoft.org>
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id $";
- #endif
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <fcntl.h>
- #include <string.h>
- #include <errno.h>
- #include <dev/usb/usb.h>
- #include <dev/usb/usbhid.h>
- #include <usbhid.h>
- #include "SDL_error.h"
- #include "SDL_joystick.h"
- #include "SDL_sysjoystick.h"
- #include "SDL_joystick_c.h"
- #define MAX_UHID_JOYS 4
- #define MAX_JOY_JOYS 2
- #define MAX_JOYS (MAX_UHID_JOYS + MAX_JOY_JOYS)
- struct report {
- struct usb_ctl_report *buf; /* Buffer */
- size_t size; /* Buffer size */
- int rid; /* Report ID */
- enum {
- SREPORT_UNINIT,
- SREPORT_CLEAN,
- SREPORT_DIRTY
- } status;
- };
- static struct {
- int uhid_report;
- enum hid_kind kind;
- const char *name;
- } const repinfo[] = {
- { UHID_INPUT_REPORT, hid_input, "input" },
- { UHID_OUTPUT_REPORT, hid_output, "output" },
- { UHID_FEATURE_REPORT, hid_feature, "feature" }
- };
- enum {
- REPORT_INPUT = 0,
- REPORT_OUTPUT = 1,
- REPORT_FEATURE = 2
- };
- enum {
- JOYAXE_X,
- JOYAXE_Y,
- JOYAXE_Z,
- JOYAXE_SLIDER,
- JOYAXE_WHEEL
- };
- struct joystick_hwdata {
- int fd;
- char *path;
- enum {
- BSDJOY_UHID, /* uhid(4) */
- BSDJOY_JOY /* joy(4) */
- } type;
- struct report_desc *repdesc;
- struct report inreport;
- #if 0
- int axismin[];
- int axismax[];
- #endif
- };
- static char *joynames[MAX_JOYS];
- static char *joydevnames[MAX_JOYS];
- static int report_alloc(struct report *, struct report_desc *, int);
- static void report_free(struct report *);
- int
- SDL_SYS_JoystickInit(void)
- {
- char s[10];
- int i, fd;
- SDL_numjoysticks = 0;
- memset(joynames, NULL, sizeof(joynames));
- memset(joydevnames, NULL, sizeof(joydevnames));
- for (i = 0; i < MAX_UHID_JOYS; i++) {
- sprintf(s, "/dev/uhid%d", i);
- fd = open(s, O_RDWR);
- if (fd > 0) {
- joynames[SDL_numjoysticks++] = strdup(s);
- close(fd);
- }
- }
- for (i = 0; i < MAX_JOY_JOYS; i++) {
- sprintf(s, "/dev/joy%d", i);
- fd = open(s, O_RDWR);
- if (fd > 0) {
- joynames[SDL_numjoysticks++] = strdup(s);
- close(fd);
- }
- }
- /* Read the default USB HID usage table. */
- hid_init(NULL);
- return (SDL_numjoysticks);
- }
- const char *
- SDL_SYS_JoystickName(int index)
- {
- if (joydevnames[index] != NULL) {
- return (joydevnames[index]);
- }
- return (joynames[index]);
- }
- int
- SDL_SYS_JoystickOpen(SDL_Joystick *joy)
- {
- char *path = joynames[joy->index];
- struct joystick_hwdata *hw;
- struct hid_item hitem;
- struct hid_data *hdata;
- struct report *rep;
- int fd;
- fd = open(path, O_RDWR);
- if (fd < 0) {
- SDL_SetError("%s: %s", path, strerror(errno));
- return (-1);
- }
- hw = (struct joystick_hwdata *)malloc(sizeof(struct joystick_hwdata));
- if (hw == NULL) {
- SDL_OutOfMemory();
- close(fd);
- return (-1);
- }
- joy->hwdata = hw;
- hw->fd = fd;
- hw->path = strdup(path);
- hw->type = BSDJOY_UHID;
- hw->repdesc = hid_get_report_desc(fd);
- if (hw->repdesc == NULL) {
- SDL_SetError("%s: USB_GET_REPORT_DESC: %s", hw->path,
- strerror(errno));
- goto usberr;
- }
- rep = &hw->inreport;
- if (report_alloc(rep, hw->repdesc, REPORT_INPUT) < 0) {
- goto usberr;
- }
- if (rep->size <= 0) {
- SDL_SetError("%s: Input report descriptor has invalid length",
- hw->path);
- goto usberr;
- }
- hdata = hid_start_parse(hw->repdesc, 1 << hid_input);
- if (hdata == NULL) {
- SDL_SetError("%s: Cannot start HID parser", hw->path);
- goto usberr;
- }
- joy->naxes = 0;
- joy->nbuttons = 0;
- joy->nhats = 0;
- joy->nballs = 0;
- while (hid_get_item(hdata, &hitem) > 0) {
- char *s, *sp;
- switch (hitem.kind) {
- case hid_collection:
- switch (HID_PAGE(hitem.usage)) {
- case HUP_GENERIC_DESKTOP:
- switch (HID_USAGE(hitem.usage)) {
- case HUG_JOYSTICK:
- case HUG_GAME_PAD:
- s = hid_usage_in_page(hitem.usage);
- sp = malloc(strlen(s) + 5);
- sprintf(sp, "%s (%d)", s,
- joy->index);
- joydevnames[joy->index] = sp;
- }
- }
- break;
- case hid_input:
- switch (HID_PAGE(hitem.usage)) {
- case HUP_UNDEFINED:
- break;
- case HUP_GENERIC_DESKTOP:
- switch (HID_USAGE(hitem.usage)) {
- case HUG_X:
- case HUG_Y:
- case HUG_Z:
- case HUG_SLIDER:
- case HUG_WHEEL:
- #if 0
- hw->axismin[joy->naxes] =
- hitem.logical_minimum;
- hw->axismax[joy->naxes] =
- hitem.logical_maximum;
- #endif
- joy->naxes++;
- break;
- }
- break;
- case HUP_BUTTON:
- joy->nbuttons++;
- break;
- }
- break;
- default:
- break;
- }
- }
- hid_end_parse(hdata);
- /* The poll blocks the event thread. */
- fcntl(fd, F_SETFL, O_NONBLOCK);
- return (0);
- usberr:
- close(hw->fd);
- free(hw->path);
- free(hw);
- return (-1);
- }
- void
- SDL_SYS_JoystickUpdate(SDL_Joystick *joy)
- {
- static struct hid_item hitem;
- static struct hid_data *hdata;
- static struct report *rep;
- int nbutton, naxe;
- Sint32 v;
- rep = &joy->hwdata->inreport;
- if (read(joy->hwdata->fd, rep->buf->data, rep->size) != rep->size) {
- return;
- }
- hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input);
- if (hdata == NULL) {
- fprintf(stderr, "%s: Cannot start HID parsern",
- joy->hwdata->path);
- return;
- }
- for (nbutton = 0; hid_get_item(hdata, &hitem) > 0;) {
- switch (hitem.kind) {
- case hid_input:
- switch (HID_PAGE(hitem.usage)) {
- case HUP_UNDEFINED:
- continue;
- case HUP_GENERIC_DESKTOP:
- switch (HID_USAGE(hitem.usage)) {
- case HUG_X:
- naxe = JOYAXE_X;
- goto scaleaxe;
- case HUG_Y:
- naxe = JOYAXE_Y;
- goto scaleaxe;
- case HUG_Z:
- naxe = JOYAXE_Z;
- goto scaleaxe;
- case HUG_SLIDER:
- naxe = JOYAXE_SLIDER;
- goto scaleaxe;
- case HUG_WHEEL:
- naxe = JOYAXE_WHEEL;
- goto scaleaxe;
- }
- scaleaxe:
- v = (Sint32)hid_get_data(rep->buf->data, &hitem);
- if (v != 127) {
- if (v < 127) {
- v = -(256 - v);
- v <<= 7;
- v++;
- } else {
- v++;
- v <<= 7;
- v--;
- }
- } else {
- v = 0;
- }
- if (v != joy->axes[naxe]) {
- SDL_PrivateJoystickAxis(joy, naxe, v);
- }
- break;
- case HUP_BUTTON:
- v = (Sint32)hid_get_data(rep->buf->data,
- &hitem);
- if (joy->buttons[nbutton] != v) {
- SDL_PrivateJoystickButton(joy,
- nbutton, v);
- }
- nbutton++;
- break;
- }
- break;
- default:
- break;
- }
- }
- hid_end_parse(hdata);
- return;
- }
- /* Function to close a joystick after use */
- void
- SDL_SYS_JoystickClose(SDL_Joystick *joy)
- {
- report_free(&joy->hwdata->inreport);
- hid_dispose_report_desc(joy->hwdata->repdesc);
- close(joy->hwdata->fd);
- free(joy->hwdata->path);
- free(joy->hwdata);
- return;
- }
- void
- SDL_SYS_JoystickQuit(void)
- {
- int i;
- for (i = 0; i < MAX_JOYS; i++) {
- if (joynames[i] != NULL)
- free(joynames[i]);
- if (joydevnames[i] != NULL)
- free(joydevnames[i]);
- }
- return;
- }
- static int
- report_alloc(struct report *r, struct report_desc *rd, int repind)
- {
- int len;
- len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
- if (len < 0) {
- SDL_SetError("Negative HID report size");
- return (-1);
- }
- r->size = len;
- if (r->size > 0) {
- r->buf = malloc(sizeof(*r->buf) - sizeof(r->buf->data) +
- r->size);
- if (r->buf == NULL) {
- SDL_OutOfMemory();
- return (-1);
- }
- } else {
- r->buf = NULL;
- }
- r->status = SREPORT_CLEAN;
- return (0);
- }
- static void
- report_free(struct report *r)
- {
- if (r->buf != NULL) {
- free(r->buf);
- }
- r->status = SREPORT_UNINIT;
- }