| 1 |
/* |
| 2 |
* mintv.cpp - 50/60Hz video display using v4l and XVideo |
| 3 |
* |
| 4 |
* Written in 2003 by Christian Bauer |
| 5 |
*/ |
| 6 |
|
| 7 |
#include <stdio.h> |
| 8 |
#include <stdlib.h> |
| 9 |
#include <getopt.h> |
| 10 |
#include <errno.h> |
| 11 |
|
| 12 |
#include <unistd.h> |
| 13 |
#include <fcntl.h> |
| 14 |
#include <sys/time.h> |
| 15 |
#include <sys/ioctl.h> |
| 16 |
#include <sys/mman.h> |
| 17 |
#include <sys/shm.h> |
| 18 |
#include <linux/videodev.h> |
| 19 |
|
| 20 |
#include <X11/Xlib.h> |
| 21 |
#include <X11/Xutil.h> |
| 22 |
#include <X11/StringDefs.h> |
| 23 |
#include <X11/Intrinsic.h> |
| 24 |
#include <X11/Shell.h> |
| 25 |
#include <X11/cursorfont.h> |
| 26 |
#include <X11/Xaw/Simple.h> |
| 27 |
#include <X11/extensions/XShm.h> |
| 28 |
#include <X11/extensions/Xv.h> |
| 29 |
#include <X11/extensions/Xvlib.h> |
| 30 |
|
| 31 |
static bool ntsc = false; |
| 32 |
|
| 33 |
const int PAL_WIDTH = 384; |
| 34 |
const int PAL_HEIGHT = 288; |
| 35 |
const int NTSC_WIDTH = 360; |
| 36 |
const int NTSC_HEIGHT = 240; |
| 37 |
|
| 38 |
static int grab_width = -1, grab_height; |
| 39 |
static int image_width, image_height; |
| 40 |
static int win_width, win_height; |
| 41 |
|
| 42 |
const double PAL_FPS = 50.0; |
| 43 |
const double NTSC_FPS = 59.94; |
| 44 |
|
| 45 |
static double fps; |
| 46 |
|
| 47 |
static int brightness = 50, contrast = 50, color = 50; |
| 48 |
|
| 49 |
static int channel = 1; |
| 50 |
|
| 51 |
#define XV_FORMAT 0x32595559 |
| 52 |
#define BYTES_PER_PIXEL 2 |
| 53 |
|
| 54 |
#define DOUBLE_FRAME 1 |
| 55 |
#define LOGGING 0 |
| 56 |
|
| 57 |
#if LOGGING |
| 58 |
static FILE *log; |
| 59 |
#endif |
| 60 |
|
| 61 |
static int port = -1; |
| 62 |
static Display *dpy; |
| 63 |
static GC gc; |
| 64 |
static Atom wm; |
| 65 |
static Widget app_shell, video; |
| 66 |
static XShmSegmentInfo shminfo; |
| 67 |
static XvImage *image[2]; |
| 68 |
static int fd = -1; |
| 69 |
|
| 70 |
static void quit(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 71 |
{ |
| 72 |
XShmDetach(dpy, &shminfo); |
| 73 |
shmdt(shminfo.shmaddr); |
| 74 |
|
| 75 |
if (fd >= 0) { |
| 76 |
video_audio au; |
| 77 |
au.audio = 1; |
| 78 |
ioctl(fd, VIDIOCGAUDIO, &au); |
| 79 |
au.flags |= VIDEO_AUDIO_MUTE; |
| 80 |
ioctl(fd, VIDIOCSAUDIO, &au); |
| 81 |
close(fd); |
| 82 |
} |
| 83 |
|
| 84 |
exit(0); |
| 85 |
} |
| 86 |
|
| 87 |
static void set_bcc(void) |
| 88 |
{ |
| 89 |
video_picture pict; |
| 90 |
if (ioctl(fd, VIDIOCGPICT, &pict) < 0) { |
| 91 |
fprintf(stderr, "ioctl VIDIOCGPICT: %s\n", strerror(errno)); |
| 92 |
exit(1); |
| 93 |
} |
| 94 |
pict.brightness = brightness * 65536 / 100; |
| 95 |
pict.contrast = contrast * 65536 / 100; |
| 96 |
pict.colour = color * 65536 / 100; |
| 97 |
if (ioctl(fd, VIDIOCSPICT, &pict) < 0) { |
| 98 |
fprintf(stderr, "ioctl VIDIOCSPICT: %s\n", strerror(errno)); |
| 99 |
exit(1); |
| 100 |
} |
| 101 |
} |
| 102 |
|
| 103 |
static void inc_brightness(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 104 |
{ |
| 105 |
if (brightness < 100) |
| 106 |
brightness++; |
| 107 |
set_bcc(); |
| 108 |
} |
| 109 |
|
| 110 |
static void dec_brightness(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 111 |
{ |
| 112 |
if (brightness > 0) |
| 113 |
brightness--; |
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set_bcc(); |
| 115 |
} |
| 116 |
|
| 117 |
static void reset_brightness(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 118 |
{ |
| 119 |
brightness = 50; |
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set_bcc(); |
| 121 |
} |
| 122 |
|
| 123 |
static void inc_contrast(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 124 |
{ |
| 125 |
if (contrast < 100) |
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contrast++; |
| 127 |
set_bcc(); |
| 128 |
} |
| 129 |
|
| 130 |
static void dec_contrast(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 131 |
{ |
| 132 |
if (contrast > 0) |
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contrast--; |
| 134 |
set_bcc(); |
| 135 |
} |
| 136 |
|
| 137 |
static void reset_contrast(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 138 |
{ |
| 139 |
contrast = 50; |
| 140 |
set_bcc(); |
| 141 |
} |
| 142 |
|
| 143 |
static void inc_color(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 144 |
{ |
| 145 |
if (color < 100) |
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color++; |
| 147 |
set_bcc(); |
| 148 |
} |
| 149 |
|
| 150 |
static void dec_color(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 151 |
{ |
| 152 |
if (color > 0) |
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color--; |
| 154 |
set_bcc(); |
| 155 |
} |
| 156 |
|
| 157 |
static void reset_color(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 158 |
{ |
| 159 |
color = 50; |
| 160 |
set_bcc(); |
| 161 |
} |
| 162 |
|
| 163 |
static void set_channel(void) |
| 164 |
{ |
| 165 |
video_channel chan; |
| 166 |
chan.channel = channel; |
| 167 |
if (ioctl(fd, VIDIOCGCHAN, &chan) < 0) { |
| 168 |
fprintf(stderr, "ioctl VIDIOCGCHAN: %s\n", strerror(errno)); |
| 169 |
exit(1); |
| 170 |
} |
| 171 |
if (ntsc) |
| 172 |
chan.norm = VIDEO_MODE_NTSC; |
| 173 |
else |
| 174 |
chan.norm = VIDEO_MODE_PAL; |
| 175 |
if (ioctl(fd, VIDIOCSCHAN, &chan) < 0) { |
| 176 |
fprintf(stderr, "ioctl VIDIOCSCHAN: %s\n", strerror(errno)); |
| 177 |
exit(1); |
| 178 |
} |
| 179 |
} |
| 180 |
|
| 181 |
static void select_channel_1(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 182 |
{ |
| 183 |
channel = 1; |
| 184 |
set_channel(); |
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} |
| 186 |
|
| 187 |
static void select_channel_2(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
| 188 |
{ |
| 189 |
channel = 2; |
| 190 |
set_channel(); |
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} |
| 192 |
|
| 193 |
static XtActionsRec actionTable[] = { |
| 194 |
{"quit", quit}, |
| 195 |
{"inc_brightness", inc_brightness}, |
| 196 |
{"dec_brightness", dec_brightness}, |
| 197 |
{"reset_brightness", reset_brightness}, |
| 198 |
{"inc_contrast", inc_contrast}, |
| 199 |
{"dec_contrast", dec_contrast}, |
| 200 |
{"reset_contrast", reset_contrast}, |
| 201 |
{"inc_color", inc_color}, |
| 202 |
{"dec_color", dec_color}, |
| 203 |
{"reset_color", reset_color}, |
| 204 |
{"select_channel_1", select_channel_1}, |
| 205 |
{"select_channel_2", select_channel_2} |
| 206 |
}; |
| 207 |
|
| 208 |
static void resize_event(Widget widget, XtPointer client_data, XEvent *event, Boolean *d) |
| 209 |
{ |
| 210 |
if (event->type == ConfigureNotify) { |
| 211 |
win_width = event->xconfigure.width; |
| 212 |
win_height = event->xconfigure.height; |
| 213 |
} |
| 214 |
} |
| 215 |
|
| 216 |
static video_mbuf mbuf; |
| 217 |
static void *buf = NULL; |
| 218 |
static video_mmap mm[2]; |
| 219 |
static int bufnum = 0; |
| 220 |
|
| 221 |
typedef long long int64; |
| 222 |
typedef unsigned long long uint64; |
| 223 |
|
| 224 |
uint64 GetTicks_usec(void) |
| 225 |
{ |
| 226 |
struct timeval t; |
| 227 |
gettimeofday(&t, NULL); |
| 228 |
return (uint64)t.tv_sec * 1000000 + t.tv_usec; |
| 229 |
} |
| 230 |
|
| 231 |
void Delay_usec(unsigned usec) |
| 232 |
{ |
| 233 |
int was_error; |
| 234 |
struct timeval tv; |
| 235 |
|
| 236 |
/* Set the timeout interval - Linux only needs to do this once */ |
| 237 |
tv.tv_sec = 0; |
| 238 |
tv.tv_usec = usec; |
| 239 |
do { |
| 240 |
errno = 0; |
| 241 |
was_error = select(0, NULL, NULL, NULL, &tv); |
| 242 |
} while (was_error && (errno == EINTR)); |
| 243 |
} |
| 244 |
|
| 245 |
uint64 frame_time = 0; |
| 246 |
|
| 247 |
static Boolean work_proc(XtPointer client_data) |
| 248 |
{ |
| 249 |
ioctl(fd, VIDIOCMCAPTURE, &(mm[bufnum ^ 1])); |
| 250 |
ioctl(fd, VIDIOCSYNC, &bufnum); |
| 251 |
|
| 252 |
uint64 now = GetTicks_usec(); |
| 253 |
#if LOGGING |
| 254 |
fprintf(log, "frame_time: %Ld\n", now - frame_time); |
| 255 |
#endif |
| 256 |
frame_time = now; |
| 257 |
|
| 258 |
#if DOUBLE_FRAME |
| 259 |
char *src = (char *)buf + mbuf.offsets[bufnum]; |
| 260 |
char *dst = image[0]->data; |
| 261 |
for (unsigned y=0; y<grab_height; y+=2) { |
| 262 |
memcpy(dst, src, grab_width * BYTES_PER_PIXEL); |
| 263 |
src += grab_width * BYTES_PER_PIXEL * 2; |
| 264 |
dst += grab_width * BYTES_PER_PIXEL; |
| 265 |
} |
| 266 |
|
| 267 |
uint64 prev = GetTicks_usec(); |
| 268 |
|
| 269 |
XvShmPutImage( |
| 270 |
dpy, port, XtWindow(video), gc, image[0], |
| 271 |
0, 0, image_width, image_height, |
| 272 |
0, 0, win_width, win_height, |
| 273 |
False |
| 274 |
); |
| 275 |
|
| 276 |
src = (char *)buf + mbuf.offsets[bufnum] + grab_width * BYTES_PER_PIXEL; |
| 277 |
dst = image[1]->data; |
| 278 |
for (unsigned y=0; y<grab_height; y+=2) { |
| 279 |
memcpy(dst, src, grab_width * BYTES_PER_PIXEL); |
| 280 |
src += grab_width * BYTES_PER_PIXEL * 2; |
| 281 |
dst += grab_width * BYTES_PER_PIXEL; |
| 282 |
} |
| 283 |
|
| 284 |
XSync(dpy, False); |
| 285 |
|
| 286 |
now = GetTicks_usec(); |
| 287 |
uint64 elapsed = now - prev; |
| 288 |
int64 delay = int64(1000000.0 / fps) - (now - prev); |
| 289 |
#if LOGGING |
| 290 |
fprintf(log, "elapsed %Ld usec, delay %Ld usec\n", elapsed, delay); |
| 291 |
#endif |
| 292 |
if (delay > 0) |
| 293 |
Delay_usec(delay); |
| 294 |
|
| 295 |
XvShmPutImage( |
| 296 |
dpy, port, XtWindow(video), gc, image[1], |
| 297 |
0, 0, image_width, image_height, |
| 298 |
0, 0, win_width, win_height, |
| 299 |
False |
| 300 |
); |
| 301 |
XSync(dpy, False); |
| 302 |
#else |
| 303 |
memcpy(image[0]->data, (char *)buf + mbuf.offsets[bufnum], image[0]->data_size); |
| 304 |
|
| 305 |
XvShmPutImage( |
| 306 |
dpy, port, XtWindow(video), gc, image[0], |
| 307 |
0, 0, image_width, image_height, |
| 308 |
0, 0, win_width, win_height, |
| 309 |
False |
| 310 |
); |
| 311 |
XSync(dpy, False); |
| 312 |
#endif |
| 313 |
|
| 314 |
bufnum ^= 1; |
| 315 |
|
| 316 |
return False; |
| 317 |
} |
| 318 |
|
| 319 |
int main(int argc, char **argv) |
| 320 |
{ |
| 321 |
static struct option long_opts[] = { |
| 322 |
{"help", 0, 0, 'h'}, |
| 323 |
{"ntsc", 0, 0, 'n'}, |
| 324 |
{"port", 1, 0, 'p'}, |
| 325 |
{"width", 1, 0, 'w'}, |
| 326 |
{NULL, 0, 0, 0} |
| 327 |
}; |
| 328 |
|
| 329 |
#if LOGGING |
| 330 |
log = fopen("log", "w"); |
| 331 |
#endif |
| 332 |
|
| 333 |
// Parse options |
| 334 |
for (;;) { |
| 335 |
int c; |
| 336 |
if ((c = getopt_long(argc, argv, "hnp:w:", long_opts,NULL)) == -1) |
| 337 |
break; |
| 338 |
|
| 339 |
switch (c) { |
| 340 |
case 0: /* Long option */ |
| 341 |
break; |
| 342 |
case 'n': |
| 343 |
ntsc = true; |
| 344 |
break; |
| 345 |
case 'p': |
| 346 |
port = atoi(optarg); |
| 347 |
break; |
| 348 |
case 'w': |
| 349 |
grab_width = atoi(optarg); |
| 350 |
break; |
| 351 |
case 'h': |
| 352 |
default: |
| 353 |
fprintf(stderr, |
| 354 |
"50/60Hz video display application\n\n" |
| 355 |
"Options:\n" |
| 356 |
" -h | --help this text\n" |
| 357 |
" -n | --ntsc NTSC mode\n" |
| 358 |
" -p | --port n Xv output port\n" |
| 359 |
" -w | --width n image width\n\n" |
| 360 |
"Keyboard commands:\n" |
| 361 |
" q quit\n" |
| 362 |
" 1/2 select channel\n" |
| 363 |
" KP 7/4/1 adjust brightness\n" |
| 364 |
" KP 8/5/2 adjust contrast\n" |
| 365 |
" KP 9/6/3 adjust color\n" |
| 366 |
); |
| 367 |
exit(1); |
| 368 |
break; |
| 369 |
} |
| 370 |
} |
| 371 |
|
| 372 |
// Init X11 |
| 373 |
XtAppContext app_context; |
| 374 |
app_shell = XtAppInitialize(&app_context, "mintv", NULL, 0, &argc, argv, NULL, NULL, 0); |
| 375 |
dpy = XtDisplay(app_shell); |
| 376 |
XtAppAddActions(app_context,actionTable, sizeof(actionTable) / sizeof(XtActionsRec)); |
| 377 |
XtOverrideTranslations(app_shell, XtParseTranslationTable( |
| 378 |
"<Message>WM_PROTOCOLS: quit()\n" |
| 379 |
"<Key>q: quit()\n" |
| 380 |
"<Key>Escape: quit()\n" |
| 381 |
"<Key>1: select_channel_1()\n" |
| 382 |
"<Key>2: select_channel_2()\n" |
| 383 |
"<Key>KP_7: inc_brightness()\n" |
| 384 |
"<Key>KP_4: reset_brightness()\n" |
| 385 |
"<Key>KP_1: dec_brightness()\n" |
| 386 |
"<Key>KP_8: inc_contrast()\n" |
| 387 |
"<Key>KP_5: reset_contrast()\n" |
| 388 |
"<Key>KP_2: dec_contrast()\n" |
| 389 |
"<Key>KP_9: inc_color()\n" |
| 390 |
"<Key>KP_6: reset_color()\n" |
| 391 |
"<Key>KP_3: dec_color()" |
| 392 |
)); |
| 393 |
XtAddEventHandler(app_shell, StructureNotifyMask, True, resize_event, NULL); |
| 394 |
wm = XInternAtom(XtDisplay(app_shell), "WM_DELETE_WINDOW", False); |
| 395 |
|
| 396 |
// Xvideo available? |
| 397 |
unsigned ver, rel, req, ev, err, val; |
| 398 |
if (XvQueryExtension(dpy, &ver, &rel, &req, &ev, &err) != Success) { |
| 399 |
fprintf(stderr, "Server doesn't support Xvideo\n"); |
| 400 |
exit(1); |
| 401 |
} |
| 402 |
|
| 403 |
// Yes, query available adaptors |
| 404 |
unsigned num_adaptors; |
| 405 |
XvAdaptorInfo *ai; |
| 406 |
if (XvQueryAdaptors(dpy, DefaultRootWindow(dpy), &num_adaptors, &ai) != Success) { |
| 407 |
fprintf(stderr, "XvQueryAdaptors failed\n"); |
| 408 |
exit(1); |
| 409 |
} |
| 410 |
|
| 411 |
// Find usable port |
| 412 |
if (port < 0) { |
| 413 |
for (unsigned i=0; i<num_adaptors; i++) { |
| 414 |
if (ai[i].type & XvImageMask) { |
| 415 |
for (unsigned p=ai[i].base_id; p<ai[i].base_id+ai[i].num_ports; p++) { |
| 416 |
int num_formats; |
| 417 |
XvImageFormatValues *fo = XvListImageFormats(dpy, p, &num_formats); |
| 418 |
if (fo) { |
| 419 |
for (unsigned j=0; j<num_formats; j++) { |
| 420 |
if (fo[j].id == XV_FORMAT) { |
| 421 |
port = p; |
| 422 |
goto port_found; |
| 423 |
} |
| 424 |
} |
| 425 |
XFree(fo); |
| 426 |
} |
| 427 |
} |
| 428 |
} |
| 429 |
} |
| 430 |
port_found: |
| 431 |
; |
| 432 |
} |
| 433 |
if (port < 0) { |
| 434 |
fprintf(stderr, "No suitable XVideo port found\n"); |
| 435 |
exit(1); |
| 436 |
} else |
| 437 |
printf("Using XVideo port %d\n", port); |
| 438 |
|
| 439 |
// Set grab and window dimensions |
| 440 |
if (ntsc) { |
| 441 |
if (grab_width == -1) |
| 442 |
grab_width = NTSC_WIDTH; |
| 443 |
grab_height = NTSC_HEIGHT; |
| 444 |
fps = NTSC_FPS; |
| 445 |
} else { |
| 446 |
if (grab_width == -1) |
| 447 |
grab_width = PAL_WIDTH; |
| 448 |
grab_height = PAL_HEIGHT; |
| 449 |
fps = PAL_FPS; |
| 450 |
} |
| 451 |
image_width = grab_width; |
| 452 |
image_height = grab_height; |
| 453 |
win_width = DisplayWidth(dpy, DefaultScreen(dpy)); |
| 454 |
win_height = DisplayHeight(dpy, DefaultScreen(dpy)); |
| 455 |
#if DOUBLE_FRAME |
| 456 |
grab_height *= 2; |
| 457 |
#endif |
| 458 |
|
| 459 |
// Open window |
| 460 |
video = XtVaCreateManagedWidget("video", simpleWidgetClass, app_shell, |
| 461 |
XtNwidth, win_width, |
| 462 |
XtNheight, win_height, |
| 463 |
NULL |
| 464 |
); |
| 465 |
XtRealizeWidget(app_shell); |
| 466 |
Cursor null_cursor = XCreateFontCursor(dpy, XC_left_ptr); |
| 467 |
XDefineCursor(dpy, XtWindow(app_shell), null_cursor); |
| 468 |
XtVaSetValues(app_shell, |
| 469 |
XtNtitle, "mintv", |
| 470 |
XtNinput, True, |
| 471 |
NULL |
| 472 |
); |
| 473 |
XSetWMProtocols(dpy, XtWindow(app_shell), &wm, 1); |
| 474 |
gc = XCreateGC(dpy, XtWindow(video), 0, NULL); |
| 475 |
|
| 476 |
// Set image format |
| 477 |
unsigned format = XV_FORMAT; |
| 478 |
|
| 479 |
// Create image |
| 480 |
image[0] = XvShmCreateImage(dpy, port, format, NULL, image_width, image_height, &shminfo); |
| 481 |
image[1] = XvShmCreateImage(dpy, port, format, NULL, image_width, image_height, &shminfo); |
| 482 |
shminfo.shmid = shmget(IPC_PRIVATE, image[0]->data_size * 2, IPC_CREAT | 0777); |
| 483 |
shminfo.shmaddr = (char *)shmat(shminfo.shmid, NULL, 0); |
| 484 |
shminfo.readOnly = False; |
| 485 |
image[0]->data = shminfo.shmaddr; |
| 486 |
image[1]->data = shminfo.shmaddr + image[0]->data_size; |
| 487 |
XShmAttach(dpy, &shminfo); |
| 488 |
XSync(dpy, False); |
| 489 |
shmctl(shminfo.shmid, IPC_RMID, 0); |
| 490 |
memset(image[0]->data, 0x80, image[0]->data_size * 2); |
| 491 |
|
| 492 |
// Open frame grabber device |
| 493 |
fd = open("/dev/video0", O_RDWR); |
| 494 |
if (fd < 0) { |
| 495 |
fprintf(stderr, "Can't open /dev/video0: %s\n", strerror(errno)); |
| 496 |
exit(1); |
| 497 |
} |
| 498 |
|
| 499 |
// Set channel |
| 500 |
set_channel(); |
| 501 |
|
| 502 |
video_audio au; |
| 503 |
au.audio = 1; |
| 504 |
if (ioctl(fd, VIDIOCGAUDIO, &au) < 0) { |
| 505 |
fprintf(stderr, "ioctl VIDIOCGAUDIO: %s\n", strerror(errno)); |
| 506 |
exit(1); |
| 507 |
} |
| 508 |
au.flags &= ~VIDEO_AUDIO_MUTE; |
| 509 |
if (ioctl(fd, VIDIOCSAUDIO, &au) < 0) { |
| 510 |
fprintf(stderr, "ioctl VIDIOCSAUDIO: %s\n", strerror(errno)); |
| 511 |
exit(1); |
| 512 |
} |
| 513 |
|
| 514 |
// Configure frame grabber |
| 515 |
set_bcc(); |
| 516 |
|
| 517 |
if (ioctl(fd, VIDIOCGMBUF, &mbuf) < 0) { |
| 518 |
fprintf(stderr, "ioctl VIDIOCGMBUF: %s\n", strerror(errno)); |
| 519 |
exit(1); |
| 520 |
} |
| 521 |
|
| 522 |
buf = mmap(NULL, mbuf.size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
| 523 |
if (buf == NULL) { |
| 524 |
fprintf(stderr, "mmap failed: %s\n", strerror(errno)); |
| 525 |
exit(1); |
| 526 |
} |
| 527 |
|
| 528 |
mm[0].frame = 0; |
| 529 |
mm[0].width = grab_width; |
| 530 |
mm[0].height = grab_height; |
| 531 |
mm[0].format = VIDEO_PALETTE_YUV422; |
| 532 |
mm[1].frame = 1; |
| 533 |
mm[1].width = grab_width; |
| 534 |
mm[1].height = grab_height; |
| 535 |
mm[1].format = VIDEO_PALETTE_YUV422; |
| 536 |
ioctl(fd, VIDIOCMCAPTURE, &(mm[bufnum])); |
| 537 |
|
| 538 |
// Disable screen saver |
| 539 |
XSetScreenSaver(dpy, 0, 0, DefaultBlanking, DefaultExposures); |
| 540 |
|
| 541 |
// Main loop |
| 542 |
XtAppAddWorkProc(app_context, work_proc, NULL); |
| 543 |
XtAppMainLoop(app_context); |
| 544 |
|
| 545 |
return 0; |
| 546 |
} |
