| 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> |
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|
| 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/Xaw/Simple.h> |
| 26 |
#include <X11/extensions/XShm.h> |
| 27 |
#include <X11/extensions/Xv.h> |
| 28 |
#include <X11/extensions/Xvlib.h> |
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|
| 30 |
const int PAL_WIDTH = 384; |
| 31 |
const int PAL_HEIGHT = 288; |
| 32 |
const int NTSC_WIDTH = 320; |
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const int NTSC_HEIGHT = 240; |
| 34 |
|
| 35 |
static int grab_width, grab_height; |
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static int image_width, image_height; |
| 37 |
static int win_width, win_height; |
| 38 |
|
| 39 |
const int PAL_FPS = 50; |
| 40 |
const int NTSC_FPS = 60; |
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|
| 42 |
static int fps; |
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|
| 44 |
#define XV_FORMAT 0x32595559 |
| 45 |
#define BYTES_PER_PIXEL 2 |
| 46 |
|
| 47 |
#define DOUBLE_FRAME 1 |
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#define LOGGING 0 |
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|
| 50 |
#if LOGGING |
| 51 |
static FILE *log; |
| 52 |
#endif |
| 53 |
|
| 54 |
static int port = -1; |
| 55 |
static Display *dpy; |
| 56 |
static GC gc; |
| 57 |
static Atom wm; |
| 58 |
static Widget app_shell, video; |
| 59 |
static XShmSegmentInfo shminfo; |
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static XvImage *image[2]; |
| 61 |
static int fd = -1; |
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|
| 63 |
static void quit(Widget widget, XEvent *event, String *params, Cardinal *num_params) |
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{ |
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XShmDetach(dpy, &shminfo); |
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shmdt(shminfo.shmaddr); |
| 67 |
|
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if (fd >= 0) { |
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video_audio au; |
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au.audio = 1; |
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ioctl(fd, VIDIOCGAUDIO, &au); |
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au.flags |= VIDEO_AUDIO_MUTE; |
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ioctl(fd, VIDIOCSAUDIO, &au); |
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close(fd); |
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} |
| 76 |
|
| 77 |
exit(0); |
| 78 |
} |
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|
| 80 |
static XtActionsRec actionTable[] = { |
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{"quit", quit} |
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}; |
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|
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static void resize_event(Widget widget, XtPointer client_data, XEvent *event, Boolean *d) |
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{ |
| 86 |
if (event->type == ConfigureNotify) { |
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win_width = event->xconfigure.width; |
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win_height = event->xconfigure.height; |
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} |
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} |
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|
| 92 |
static video_mbuf mbuf; |
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static void *buf = NULL; |
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static video_mmap mm[2]; |
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static int bufnum = 0; |
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|
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typedef long long int64; |
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typedef unsigned long long uint64; |
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|
| 100 |
uint64 GetTicks_usec(void) |
| 101 |
{ |
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struct timeval t; |
| 103 |
gettimeofday(&t, NULL); |
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return (uint64)t.tv_sec * 1000000 + t.tv_usec; |
| 105 |
} |
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|
| 107 |
void Delay_usec(unsigned usec) |
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{ |
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int was_error; |
| 110 |
struct timeval tv; |
| 111 |
|
| 112 |
/* Set the timeout interval - Linux only needs to do this once */ |
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tv.tv_sec = 0; |
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tv.tv_usec = usec; |
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do { |
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errno = 0; |
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was_error = select(0, NULL, NULL, NULL, &tv); |
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} while (was_error && (errno == EINTR)); |
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} |
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|
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uint64 frame_time = 0; |
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|
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static Boolean work_proc(XtPointer client_data) |
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{ |
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ioctl(fd, VIDIOCMCAPTURE, &(mm[bufnum ^ 1])); |
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ioctl(fd, VIDIOCSYNC, &bufnum); |
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|
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uint64 now = GetTicks_usec(); |
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#if LOGGING |
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fprintf(log, "frame_time: %Ld\n", now - frame_time); |
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#endif |
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frame_time = now; |
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|
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#if DOUBLE_FRAME |
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char *src = (char *)buf + mbuf.offsets[bufnum]; |
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char *dst = image[0]->data; |
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for (unsigned y=0; y<grab_height; y+=2) { |
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memcpy(dst, src, grab_width * BYTES_PER_PIXEL); |
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src += grab_width * BYTES_PER_PIXEL * 2; |
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dst += grab_width * BYTES_PER_PIXEL; |
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} |
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|
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uint64 prev = GetTicks_usec(); |
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|
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XvShmPutImage( |
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dpy, port, XtWindow(video), gc, image[0], |
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0, 0, image_width, image_height, |
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0, 0, win_width, win_height, |
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False |
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); |
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|
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src = (char *)buf + mbuf.offsets[bufnum] + grab_width * BYTES_PER_PIXEL; |
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dst = image[1]->data; |
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for (unsigned y=0; y<grab_height; y+=2) { |
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memcpy(dst, src, grab_width * BYTES_PER_PIXEL); |
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src += grab_width * BYTES_PER_PIXEL * 2; |
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dst += grab_width * BYTES_PER_PIXEL; |
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} |
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|
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XSync(dpy, False); |
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|
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now = GetTicks_usec(); |
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uint64 elapsed = now - prev; |
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int64 delay = 1000000 / fps - (now - prev); |
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#if LOGGING |
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fprintf(log, "elapsed %Ld usec, delay %Ld usec\n", elapsed, delay); |
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#endif |
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if (delay > 0) |
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Delay_usec(delay); |
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|
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XvShmPutImage( |
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dpy, port, XtWindow(video), gc, image[1], |
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0, 0, image_width, image_height, |
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0, 0, win_width, win_height, |
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False |
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); |
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XSync(dpy, False); |
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#else |
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memcpy(image[0]->data, (char *)buf + mbuf.offsets[bufnum], image[0]->data_size); |
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|
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XvShmPutImage( |
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dpy, port, XtWindow(video), gc, image[0], |
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0, 0, image_width, image_height, |
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0, 0, win_width, win_height, |
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False |
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); |
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XSync(dpy, False); |
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#endif |
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|
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bufnum ^= 1; |
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|
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return False; |
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} |
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|
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int main(int argc, char **argv) |
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{ |
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static struct option long_opts[] = { |
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{"help", 0, 0, 'h'}, |
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{"ntsc", 0, 0, 'n'}, |
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{"port", 1, 0, 'p'}, |
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{NULL, 0, 0, 0} |
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}; |
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|
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#if LOGGING |
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log = fopen("log", "w"); |
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#endif |
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|
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// Init X11 |
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XtAppContext app_context; |
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app_shell = XtAppInitialize(&app_context, "mintv", NULL, 0, &argc, argv, NULL, NULL, 0); |
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dpy = XtDisplay(app_shell); |
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XtAppAddActions(app_context,actionTable, sizeof(actionTable) / sizeof(XtActionsRec)); |
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XtOverrideTranslations(app_shell, XtParseTranslationTable( |
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"<Message>WM_PROTOCOLS: quit()\n" |
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"<Key>q: quit()" |
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)); |
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XtAddEventHandler(app_shell, StructureNotifyMask, True, resize_event, NULL); |
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wm = XInternAtom(XtDisplay(app_shell), "WM_DELETE_WINDOW", False); |
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|
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// Parse options |
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bool ntsc = false; |
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for (;;) { |
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int c; |
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if ((c = getopt_long(argc, argv, "hnp:", long_opts,NULL)) == -1) |
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break; |
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|
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switch (c) { |
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case 0: /* Long option */ |
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break; |
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case 'n': |
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ntsc = true; |
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break; |
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case 'p': |
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port = atoi(optarg); |
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break; |
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case 'h': |
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default: |
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fprintf(stderr, |
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"This is an xvideo test application.\n" |
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"Options:\n" |
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" -h | --help this text\n" |
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" -n | --ntsc NTSC mode\n" |
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" -p | --port n Xv output port\n" |
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); |
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exit(1); |
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break; |
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} |
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} |
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|
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// Xvideo available? |
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unsigned ver, rel, req, ev, err, val; |
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if (XvQueryExtension(dpy, &ver, &rel, &req, &ev, &err) != Success) { |
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fprintf(stderr, "Server doesn't support Xvideo\n"); |
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exit(1); |
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} |
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|
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// Yes, query available adaptors |
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unsigned num_adaptors; |
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XvAdaptorInfo *ai; |
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if (XvQueryAdaptors(dpy, DefaultRootWindow(dpy), &num_adaptors, &ai) != Success) { |
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fprintf(stderr, "XvQueryAdaptors failed\n"); |
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exit(1); |
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} |
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|
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// Find usable port |
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if (port < 0) { |
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for (unsigned i=0; i<num_adaptors; i++) { |
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if (ai[i].type & XvImageMask) { |
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for (unsigned p=ai[i].base_id; p<ai[i].base_id+ai[i].num_ports; p++) { |
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int num_formats; |
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XvImageFormatValues *fo = XvListImageFormats(dpy, p, &num_formats); |
| 272 |
if (fo) { |
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for (unsigned j=0; j<num_formats; j++) { |
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if (fo[j].id == XV_FORMAT) { |
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port = p; |
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goto port_found; |
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} |
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} |
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XFree(fo); |
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} |
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} |
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} |
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} |
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port_found: |
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; |
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} |
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if (port < 0) { |
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fprintf(stderr, "No suitable XVideo port found\n"); |
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exit(1); |
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} else |
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printf("Using XVideo port %d\n", port); |
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|
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// Set grab and window dimensions |
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if (ntsc) { |
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grab_width = NTSC_WIDTH; |
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grab_height = NTSC_HEIGHT; |
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fps = NTSC_FPS; |
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} else { |
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grab_width = PAL_WIDTH; |
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grab_height = PAL_HEIGHT; |
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fps = PAL_FPS; |
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} |
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image_width = grab_width; |
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image_height = grab_height; |
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win_width = DisplayWidth(dpy, DefaultScreen(dpy)); |
| 306 |
win_height = DisplayHeight(dpy, DefaultScreen(dpy)); |
| 307 |
#if DOUBLE_FRAME |
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grab_height *= 2; |
| 309 |
#endif |
| 310 |
|
| 311 |
// Open window |
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video = XtVaCreateManagedWidget("video", simpleWidgetClass, app_shell, |
| 313 |
XtNwidth, win_width, |
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XtNheight, win_height, |
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NULL |
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); |
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XtRealizeWidget(app_shell); |
| 318 |
XtVaSetValues(app_shell, |
| 319 |
XtNtitle, "mintv", |
| 320 |
NULL |
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); |
| 322 |
XSetWMProtocols(XtDisplay(app_shell), XtWindow(app_shell), &wm, 1); |
| 323 |
gc = XCreateGC(dpy, XtWindow(video), 0, NULL); |
| 324 |
|
| 325 |
// Set image format |
| 326 |
unsigned format = XV_FORMAT; |
| 327 |
|
| 328 |
// Create image |
| 329 |
image[0] = XvShmCreateImage(dpy, port, format, NULL, image_width, image_height, &shminfo); |
| 330 |
image[1] = XvShmCreateImage(dpy, port, format, NULL, image_width, image_height, &shminfo); |
| 331 |
shminfo.shmid = shmget(IPC_PRIVATE, image[0]->data_size * 2, IPC_CREAT | 0777); |
| 332 |
shminfo.shmaddr = (char *)shmat(shminfo.shmid, NULL, 0); |
| 333 |
shminfo.readOnly = False; |
| 334 |
image[0]->data = shminfo.shmaddr; |
| 335 |
image[1]->data = shminfo.shmaddr + image[0]->data_size; |
| 336 |
XShmAttach(dpy, &shminfo); |
| 337 |
XSync(dpy, False); |
| 338 |
shmctl(shminfo.shmid, IPC_RMID, 0); |
| 339 |
memset(image[0]->data, 0x80, image[0]->data_size * 2); |
| 340 |
|
| 341 |
// Open frame grabber device |
| 342 |
fd = open("/dev/video0", O_RDWR); |
| 343 |
if (fd < 0) { |
| 344 |
fprintf(stderr, "Can't open /dev/video0: %s\n", strerror(errno)); |
| 345 |
exit(1); |
| 346 |
} |
| 347 |
|
| 348 |
// Set channel |
| 349 |
video_channel chan; |
| 350 |
chan.channel = 1; |
| 351 |
if (ioctl(fd, VIDIOCGCHAN, &chan) < 0) { |
| 352 |
fprintf(stderr, "ioctl VIDIOCGCHAN: %s\n", strerror(errno)); |
| 353 |
exit(1); |
| 354 |
} |
| 355 |
if (ntsc) |
| 356 |
chan.norm = VIDEO_MODE_NTSC; |
| 357 |
else |
| 358 |
chan.norm = VIDEO_MODE_PAL; |
| 359 |
if (ioctl(fd, VIDIOCSCHAN, &chan) < 0) { |
| 360 |
fprintf(stderr, "ioctl VIDIOCSCHAN: %s\n", strerror(errno)); |
| 361 |
exit(1); |
| 362 |
} |
| 363 |
video_audio au; |
| 364 |
au.audio = 1; |
| 365 |
if (ioctl(fd, VIDIOCGAUDIO, &au) < 0) { |
| 366 |
fprintf(stderr, "ioctl VIDIOCGAUDIO: %s\n", strerror(errno)); |
| 367 |
exit(1); |
| 368 |
} |
| 369 |
au.flags &= ~VIDEO_AUDIO_MUTE; |
| 370 |
if (ioctl(fd, VIDIOCSAUDIO, &au) < 0) { |
| 371 |
fprintf(stderr, "ioctl VIDIOCSAUDIO: %s\n", strerror(errno)); |
| 372 |
exit(1); |
| 373 |
} |
| 374 |
|
| 375 |
// Configure frame grabber |
| 376 |
video_picture pict; |
| 377 |
if (ioctl(fd, VIDIOCGPICT, &pict) < 0) { |
| 378 |
fprintf(stderr, "ioctl VIDIOCGPICT: %s\n", strerror(errno)); |
| 379 |
exit(1); |
| 380 |
} |
| 381 |
pict.brightness = 45 * 65536 / 100; |
| 382 |
pict.contrast = 55 * 65536 / 100; |
| 383 |
pict.colour = 60 * 65536 / 100; |
| 384 |
if (ioctl(fd, VIDIOCSPICT, &pict) < 0) { |
| 385 |
fprintf(stderr, "ioctl VIDIOCSPICT: %s\n", strerror(errno)); |
| 386 |
exit(1); |
| 387 |
} |
| 388 |
|
| 389 |
if (ioctl(fd, VIDIOCGMBUF, &mbuf) < 0) { |
| 390 |
fprintf(stderr, "ioctl VIDIOCGMBUF: %s\n", strerror(errno)); |
| 391 |
exit(1); |
| 392 |
} |
| 393 |
|
| 394 |
buf = mmap(NULL, mbuf.size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
| 395 |
if (buf == NULL) { |
| 396 |
fprintf(stderr, "mmap failed: %s\n", strerror(errno)); |
| 397 |
exit(1); |
| 398 |
} |
| 399 |
|
| 400 |
mm[0].frame = 0; |
| 401 |
mm[0].width = grab_width; |
| 402 |
mm[0].height = grab_height; |
| 403 |
mm[0].format = VIDEO_PALETTE_YUV422; |
| 404 |
mm[1].frame = 1; |
| 405 |
mm[1].width = grab_width; |
| 406 |
mm[1].height = grab_height; |
| 407 |
mm[1].format = VIDEO_PALETTE_YUV422; |
| 408 |
ioctl(fd, VIDIOCMCAPTURE, &(mm[bufnum])); |
| 409 |
|
| 410 |
// Disable screen saver |
| 411 |
XSetScreenSaver(dpy, 0, 0, DefaultBlanking, DefaultExposures); |
| 412 |
|
| 413 |
// Main loop |
| 414 |
XtAppAddWorkProc(app_context, work_proc, NULL); |
| 415 |
XtAppMainLoop(app_context); |
| 416 |
|
| 417 |
return 0; |
| 418 |
} |
