cebix/mintv/mintv.cpp

/*
 *  mintv.cpp - 50/60Hz video display using v4l and XVideo
 *
 *  Written in 2003 by Christian Bauer
 */

#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>

#include <unistd.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/shm.h>
#include <linux/videodev.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/StringDefs.h>
#include <X11/Intrinsic.h>
#include <X11/Shell.h>
#include <X11/cursorfont.h>
#include <X11/Xaw/Simple.h>
#include <X11/extensions/XShm.h>
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>

static bool ntsc = false;

const int PAL_WIDTH = 384;
const int PAL_HEIGHT = 288;
const int NTSC_WIDTH = 360;
const int NTSC_HEIGHT = 240;

static int grab_width = -1, grab_height;
static int image_width, image_height;
static int win_width, win_height;

const double PAL_FPS = 50.0;
const double NTSC_FPS = 59.94;

static double fps;

static int brightness = 50, contrast = 50, color = 50;

static int channel = 1;

#define XV_FORMAT 0x32595559
#define BYTES_PER_PIXEL 2

#define DOUBLE_FRAME 1
#define LOGGING 0

#if LOGGING
static FILE *log;
#endif

static int port = -1;
static Display *dpy;
static GC gc;
static Atom wm;
static Widget app_shell, video;
static XShmSegmentInfo shminfo;
static XvImage *image[2];
static int fd = -1;

static void quit(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        XShmDetach(dpy, &shminfo);
        shmdt(shminfo.shmaddr);

        if (fd >= 0) {
                video_audio au;
                au.audio = 1;
                ioctl(fd, VIDIOCGAUDIO, &au);
                au.flags |= VIDEO_AUDIO_MUTE;
                ioctl(fd, VIDIOCSAUDIO, &au);
                close(fd);
        }

        exit(0);
}

static void set_bcc(void)
{
        video_picture pict;
        if (ioctl(fd, VIDIOCGPICT, &pict) < 0) {
                fprintf(stderr, "ioctl VIDIOCGPICT: %s\n", strerror(errno));
                exit(1);
        }
        pict.brightness = brightness * 65536 / 100;
        pict.contrast = contrast * 65536 / 100;
        pict.colour = color * 65536 / 100;
        if (ioctl(fd, VIDIOCSPICT, &pict) < 0) {
                fprintf(stderr, "ioctl VIDIOCSPICT: %s\n", strerror(errno));
                exit(1);
        }
}

static void inc_brightness(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        if (brightness < 100)
                brightness++;
        set_bcc();
}

static void dec_brightness(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        if (brightness > 0)
                brightness--;
        set_bcc();
}

static void reset_brightness(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        brightness = 50;
        set_bcc();
}

static void inc_contrast(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        if (contrast < 100)
                contrast++;
        set_bcc();
}

static void dec_contrast(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        if (contrast > 0)
                contrast--;
        set_bcc();
}

static void reset_contrast(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        contrast = 50;
        set_bcc();
}

static void inc_color(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        if (color < 100)
                color++;
        set_bcc();
}

static void dec_color(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        if (color > 0)
                color--;
        set_bcc();
}

static void reset_color(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        color = 50;
        set_bcc();
}

static void set_channel(void)
{
        video_channel chan;
        chan.channel = channel;
        if (ioctl(fd, VIDIOCGCHAN, &chan) < 0) {
                fprintf(stderr, "ioctl VIDIOCGCHAN: %s\n", strerror(errno));
                exit(1);
        }
        if (ntsc)
                chan.norm = VIDEO_MODE_NTSC;
        else
                chan.norm = VIDEO_MODE_PAL;
        if (ioctl(fd, VIDIOCSCHAN, &chan) < 0) {
                fprintf(stderr, "ioctl VIDIOCSCHAN: %s\n", strerror(errno));
                exit(1);
        }
}

static void select_channel_1(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        channel = 1;
        set_channel();
}

static void select_channel_2(Widget widget, XEvent *event, String *params, Cardinal *num_params)
{
        channel = 2;
        set_channel();
}

static XtActionsRec actionTable[] = {
        {"quit", quit},
        {"inc_brightness", inc_brightness},
        {"dec_brightness", dec_brightness},
        {"reset_brightness", reset_brightness},
        {"inc_contrast", inc_contrast},
        {"dec_contrast", dec_contrast},
        {"reset_contrast", reset_contrast},
        {"inc_color", inc_color},
        {"dec_color", dec_color},
        {"reset_color", reset_color},
        {"select_channel_1", select_channel_1},
        {"select_channel_2", select_channel_2}
};

static void resize_event(Widget widget, XtPointer client_data, XEvent *event, Boolean *d)
{
        if (event->type == ConfigureNotify) {
                win_width = event->xconfigure.width;
                win_height = event->xconfigure.height;
    }
}

static video_mbuf mbuf;
static void *buf = NULL;
static video_mmap mm[2];
static int bufnum = 0;

typedef long long int64;
typedef unsigned long long uint64;

uint64 GetTicks_usec(void)
{
        struct timeval t;
        gettimeofday(&t, NULL);
        return (uint64)t.tv_sec * 1000000 + t.tv_usec;
}

void Delay_usec(unsigned usec)
{
        int was_error;
        struct timeval tv;

        /* Set the timeout interval - Linux only needs to do this once */
        tv.tv_sec = 0;
        tv.tv_usec = usec;
        do {
                errno = 0;
                was_error = select(0, NULL, NULL, NULL, &tv);
        } while (was_error && (errno == EINTR));
}

uint64 frame_time = 0;

static Boolean work_proc(XtPointer client_data)
{
        ioctl(fd, VIDIOCMCAPTURE, &(mm[bufnum ^ 1]));
        ioctl(fd, VIDIOCSYNC, &bufnum);

        uint64 now = GetTicks_usec();
#if LOGGING
        fprintf(log, "frame_time: %Ld\n", now - frame_time);
#endif
        frame_time = now;

#if DOUBLE_FRAME
        char *src = (char *)buf + mbuf.offsets[bufnum];
        char *dst = image[0]->data;
        for (unsigned y=0; y<grab_height; y+=2) {
                memcpy(dst, src, grab_width * BYTES_PER_PIXEL);
                src += grab_width * BYTES_PER_PIXEL * 2;
                dst += grab_width * BYTES_PER_PIXEL;
        }

        uint64 prev = GetTicks_usec();

        XvShmPutImage(
                dpy, port, XtWindow(video), gc, image[0],
                0, 0, image_width, image_height,
                0, 0, win_width, win_height,
                False
        );

        src = (char *)buf + mbuf.offsets[bufnum] + grab_width * BYTES_PER_PIXEL;
        dst = image[1]->data;
        for (unsigned y=0; y<grab_height; y+=2) {
                memcpy(dst, src, grab_width * BYTES_PER_PIXEL);
                src += grab_width * BYTES_PER_PIXEL * 2;
                dst += grab_width * BYTES_PER_PIXEL;
        }

        XSync(dpy, False);

        now = GetTicks_usec();
        uint64 elapsed = now - prev;
        int64 delay = int64(1000000.0 / fps) - (now - prev);
#if LOGGING
        fprintf(log, "elapsed %Ld usec, delay %Ld usec\n", elapsed, delay);
#endif
        if (delay > 0)
                Delay_usec(delay);

        XvShmPutImage(
                dpy, port, XtWindow(video), gc, image[1],
                0, 0, image_width, image_height,
                0, 0, win_width, win_height,
                False
        );
        XSync(dpy, False);
#else
        memcpy(image[0]->data, (char *)buf + mbuf.offsets[bufnum], image[0]->data_size);

        XvShmPutImage(
                dpy, port, XtWindow(video), gc, image[0],
                0, 0, image_width, image_height,
                0, 0, win_width, win_height,
                False
        );
        XSync(dpy, False);
#endif

        bufnum ^= 1;

        return False;
}

int main(int argc, char **argv)
{
        static struct option long_opts[] = {
                {"help", 0, 0, 'h'},
                {"ntsc", 0, 0, 'n'},
                {"port", 1, 0, 'p'},
                {"width", 1, 0, 'w'},
                {NULL, 0, 0, 0}
        };

#if LOGGING
        log = fopen("log", "w");
#endif

        // Parse options
        for (;;) {
                int c;
                if ((c = getopt_long(argc, argv, "hnp:w:", long_opts,NULL)) == -1)
                        break;

                switch (c) {
                        case 0: /* Long option */
                                break;
                        case 'n':
                                ntsc = true;
                                break;
                        case 'p':
                                port = atoi(optarg);
                                break;
                        case 'w':
                                grab_width = atoi(optarg);
                                break;
                        case 'h':
                        default:
                                fprintf(stderr,
                                        "50/60Hz video display application\n\n"
                                        "Options:\n"
                                        "  -h | --help     this text\n"
                                        "  -n | --ntsc     NTSC mode\n"
                                        "  -p | --port n   Xv output port\n"
                                        "  -w | --width n  image width\n\n"
                                        "Keyboard commands:\n"
                                        "  q         quit\n"
                                        "  1/2       select channel\n"
                                        "  KP 7/4/1  adjust brightness\n"
                                        "  KP 8/5/2  adjust contrast\n"
                                        "  KP 9/6/3  adjust color\n"
                                );
                                exit(1);
                                break;
                }
        }

        // Init X11
        XtAppContext app_context;
        app_shell = XtAppInitialize(&app_context, "mintv", NULL, 0, &argc, argv, NULL,  NULL, 0);
        dpy = XtDisplay(app_shell);
        XtAppAddActions(app_context,actionTable, sizeof(actionTable) / sizeof(XtActionsRec));
        XtOverrideTranslations(app_shell, XtParseTranslationTable(
                "<Message>WM_PROTOCOLS: quit()\n"
                "<Key>q: quit()\n"
                "<Key>Escape: quit()\n"
                "<Key>1: select_channel_1()\n"
                "<Key>2: select_channel_2()\n"
                "<Key>KP_7: inc_brightness()\n"
                "<Key>KP_4: reset_brightness()\n"
                "<Key>KP_1: dec_brightness()\n"
                "<Key>KP_8: inc_contrast()\n"
                "<Key>KP_5: reset_contrast()\n"
                "<Key>KP_2: dec_contrast()\n"
                "<Key>KP_9: inc_color()\n"
                "<Key>KP_6: reset_color()\n"
                "<Key>KP_3: dec_color()"
        ));
        XtAddEventHandler(app_shell, StructureNotifyMask, True, resize_event, NULL);
        wm = XInternAtom(XtDisplay(app_shell), "WM_DELETE_WINDOW", False);

        // Xvideo available?
        unsigned ver, rel, req, ev, err, val;
        if (XvQueryExtension(dpy, &ver, &rel, &req, &ev, &err) != Success) {
                fprintf(stderr, "Server doesn't support Xvideo\n");
                exit(1);
        }

        // Yes, query available adaptors
        unsigned num_adaptors;
        XvAdaptorInfo *ai;
        if (XvQueryAdaptors(dpy, DefaultRootWindow(dpy), &num_adaptors, &ai) != Success) {
                fprintf(stderr, "XvQueryAdaptors failed\n");
                exit(1);
        }

        // Find usable port
        if (port < 0) {
                for (unsigned i=0; i<num_adaptors; i++) {
                        if (ai[i].type & XvImageMask) {
                                for (unsigned p=ai[i].base_id; p<ai[i].base_id+ai[i].num_ports; p++) {
                                        int num_formats;
                                        XvImageFormatValues *fo = XvListImageFormats(dpy, p, &num_formats);
                                        if (fo) {
                                                for (unsigned j=0; j<num_formats; j++) {
                                                        if (fo[j].id == XV_FORMAT) {
                                                                port = p;
                                                                goto port_found;
                                                        }
                                                }
                                                XFree(fo);
                                        }
                                }
                        }
                }
port_found:
                ;
        }
        if (port < 0) {
                fprintf(stderr, "No suitable XVideo port found\n");
                exit(1);
        } else
                printf("Using XVideo port %d\n", port);

        // Set grab and window dimensions
        if (ntsc) {
                if (grab_width == -1)
                        grab_width = NTSC_WIDTH;
                grab_height = NTSC_HEIGHT;
                fps = NTSC_FPS;
        } else {
                if (grab_width == -1)
                        grab_width = PAL_WIDTH;
                grab_height = PAL_HEIGHT;
                fps = PAL_FPS;
        }
        image_width = grab_width;
        image_height = grab_height;
        win_width = DisplayWidth(dpy, DefaultScreen(dpy));
        win_height = DisplayHeight(dpy, DefaultScreen(dpy));
#if DOUBLE_FRAME
        grab_height *= 2;
#endif

        // Open window
        video = XtVaCreateManagedWidget("video", simpleWidgetClass, app_shell,
                XtNwidth, win_width,
                XtNheight, win_height,
                NULL
        );
        XtRealizeWidget(app_shell);
        Cursor null_cursor = XCreateFontCursor(dpy, XC_left_ptr);
        XDefineCursor(dpy, XtWindow(app_shell), null_cursor);
        XtVaSetValues(app_shell,
                XtNtitle, "mintv",
                XtNinput, True,
                NULL
        );
        XSetWMProtocols(dpy, XtWindow(app_shell), &wm, 1);
        gc = XCreateGC(dpy, XtWindow(video), 0, NULL);

        // Set image format
        unsigned format = XV_FORMAT;

        // Create image
        image[0] = XvShmCreateImage(dpy, port, format, NULL, image_width, image_height, &shminfo);
        image[1] = XvShmCreateImage(dpy, port, format, NULL, image_width, image_height, &shminfo);
        shminfo.shmid = shmget(IPC_PRIVATE, image[0]->data_size * 2, IPC_CREAT | 0777);
        shminfo.shmaddr = (char *)shmat(shminfo.shmid, NULL, 0);
        shminfo.readOnly = False;
        image[0]->data = shminfo.shmaddr;
        image[1]->data = shminfo.shmaddr + image[0]->data_size;
        XShmAttach(dpy, &shminfo);
        XSync(dpy, False);
        shmctl(shminfo.shmid, IPC_RMID, 0);
        memset(image[0]->data, 0x80, image[0]->data_size * 2);

        // Open frame grabber device
        fd = open("/dev/video0", O_RDWR);
        if (fd < 0) {
                fprintf(stderr, "Can't open /dev/video0: %s\n", strerror(errno));
                exit(1);
        }

        // Set channel
        set_channel();

        video_audio au;
        au.audio = 1;
        if (ioctl(fd, VIDIOCGAUDIO, &au) < 0) {
                fprintf(stderr, "ioctl VIDIOCGAUDIO: %s\n", strerror(errno));
                exit(1);
        }
        au.flags &= ~VIDEO_AUDIO_MUTE;
        if (ioctl(fd, VIDIOCSAUDIO, &au) < 0) {
                fprintf(stderr, "ioctl VIDIOCSAUDIO: %s\n", strerror(errno));
                exit(1);
        }

        // Configure frame grabber
        set_bcc();

        if (ioctl(fd, VIDIOCGMBUF, &mbuf) < 0) {
                fprintf(stderr, "ioctl VIDIOCGMBUF: %s\n", strerror(errno));
                exit(1);
        }

        buf = mmap(NULL, mbuf.size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
        if (buf == NULL) {
                fprintf(stderr, "mmap failed: %s\n", strerror(errno));
                exit(1);
        }

        mm[0].frame = 0;
        mm[0].width = grab_width;
        mm[0].height = grab_height;
        mm[0].format = VIDEO_PALETTE_YUV422;
        mm[1].frame = 1;
        mm[1].width = grab_width;
        mm[1].height = grab_height;
        mm[1].format = VIDEO_PALETTE_YUV422;
        ioctl(fd, VIDIOCMCAPTURE, &(mm[bufnum]));

        // Disable screen saver
        XSetScreenSaver(dpy, 0, 0, DefaultBlanking, DefaultExposures);

        // Main loop
        XtAppAddWorkProc(app_context, work_proc, NULL);
        XtAppMainLoop(app_context);

        return 0;
}
Revision:	1.6
Committed:	2003-03-21T14:59:19Z (21 years, 7 months ago) by cebix
Branch:	MAIN
Changes since 1.5:	+4 -4 lines
Log Message:	NTSC frame rate is 59.94 Hz
#	User	Rev	Content
1	cebix	1.1	/*
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	cebix	1.5	#include <X11/cursorfont.h>
26	cebix	1.1	#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	cebix	1.2	static bool ntsc = false;
32
33	cebix	1.1	const int PAL_WIDTH = 384;
34			const int PAL_HEIGHT = 288;
35	cebix	1.4	const int NTSC_WIDTH = 360;
36	cebix	1.1	const int NTSC_HEIGHT = 240;
37
38	cebix	1.4	static int grab_width = -1, grab_height;
39	cebix	1.1	static int image_width, image_height;
40			static int win_width, win_height;
41
42	cebix	1.6	const double PAL_FPS = 50.0;
43			const double NTSC_FPS = 59.94;
44	cebix	1.1
45	cebix	1.6	static double fps;
46	cebix	1.1
47	cebix	1.2	static int brightness = 50, contrast = 50, color = 50;
48
49			static int channel = 1;
50
51	cebix	1.1	#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	cebix	1.2	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--;
114			set_bcc();
115			}
116
117			static void reset_brightness(Widget widget, XEvent event, String params, Cardinal *num_params)
118			{
119			brightness = 50;
120			set_bcc();
121			}
122
123			static void inc_contrast(Widget widget, XEvent event, String params, Cardinal *num_params)
124			{
125			if (contrast < 100)
126			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)
133			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)
146			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)
153			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();
185			}
186
187			static void select_channel_2(Widget widget, XEvent event, String params, Cardinal *num_params)
188			{
189			channel = 2;
190			set_channel();
191			}
192
193	cebix	1.1	static XtActionsRec actionTable[] = {
194	cebix	1.2	{"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	cebix	1.1	};
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	cebix	1.6	int64 delay = int64(1000000.0 / fps) - (now - prev);
289	cebix	1.1	#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	cebix	1.4	{"width", 1, 0, 'w'},
326	cebix	1.1	{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	cebix	1.4	if ((c = getopt_long(argc, argv, "hnp:w:", long_opts,NULL)) == -1)
337	cebix	1.1	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	cebix	1.4	case 'w':
349			grab_width = atoi(optarg);
350			break;
351	cebix	1.1	case 'h':
352			default:
353			fprintf(stderr,
354	cebix	1.3	"50/60Hz video display application\n\n"
355	cebix	1.1	"Options:\n"
356	cebix	1.4	" -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	cebix	1.2	"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	cebix	1.1	);
367			exit(1);
368			break;
369			}
370			}
371	cebix	1.3
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	cebix	1.4	"<Key>Escape: quit()\n"
381	cebix	1.3	"<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	cebix	1.1
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	cebix	1.4	if (grab_width == -1)
442			grab_width = NTSC_WIDTH;
443	cebix	1.1	grab_height = NTSC_HEIGHT;
444			fps = NTSC_FPS;
445			} else {
446	cebix	1.4	if (grab_width == -1)
447			grab_width = PAL_WIDTH;
448	cebix	1.1	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	cebix	1.5	Cursor null_cursor = XCreateFontCursor(dpy, XC_left_ptr);
467			XDefineCursor(dpy, XtWindow(app_shell), null_cursor);
468	cebix	1.1	XtVaSetValues(app_shell,
469			XtNtitle, "mintv",
470	cebix	1.5	XtNinput, True,
471	cebix	1.1	NULL
472			);
473	cebix	1.5	XSetWMProtocols(dpy, XtWindow(app_shell), &wm, 1);
474	cebix	1.1	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	cebix	1.2	set_channel();
501
502	cebix	1.1	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	cebix	1.2	set_bcc();
516	cebix	1.1
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			}