1 /*****************************************************************************
2 * fb.c : framebuffer plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2009 the VideoLAN team
7 * Authors: Samuel Hocevar <sam@zoy.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <signal.h> /* SIGUSR1, SIGUSR2 */
34 #include <fcntl.h> /* open() */
35 #include <unistd.h> /* close() */
37 #include <termios.h> /* struct termios */
38 #include <sys/ioctl.h>
39 #include <sys/mman.h> /* mmap() */
42 #include <linux/vt.h> /* VT_* */
43 #include <linux/kd.h> /* KD* */
45 #include <vlc_common.h>
46 #include <vlc_plugin.h>
47 #include <vlc_vout_display.h>
48 #include <vlc_picture_pool.h>
51 /*****************************************************************************
53 *****************************************************************************/
54 #define FB_DEV_VAR "fbdev"
56 #define DEVICE_TEXT N_("Framebuffer device")
57 #define DEVICE_LONGTEXT N_(\
58 "Framebuffer device to use for rendering (usually /dev/fb0).")
60 #define TTY_TEXT N_("Run fb on current tty.")
61 #define TTY_LONGTEXT N_(\
62 "Run framebuffer on current TTY device (default enabled). " \
63 "(disable tty handling with caution)")
65 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
66 #define FB_MODE_LONGTEXT N_(\
67 "Select the resolution for the framebuffer. Currently it supports " \
68 "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)")
70 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration.")
71 #define HW_ACCEL_LONGTEXT N_(\
72 "If your framebuffer supports hardware acceleration or does double buffering " \
73 "in hardware then you must disable this option. It then does double buffering " \
76 #define CHROMA_TEXT N_("Image format (default RGB).")
77 #define CHROMA_LONGTEXT N_("Chroma fourcc used by the framebuffer. Default is RGB since the fb device has no way to report its chroma.")
79 static int Open (vlc_object_t *);
80 static void Close(vlc_object_t *);
83 set_shortname("Framebuffer")
84 set_category(CAT_VIDEO)
85 set_subcategory(SUBCAT_VIDEO_VOUT)
86 add_file(FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
88 add_bool("fb-tty", true, NULL, TTY_TEXT, TTY_LONGTEXT, true)
89 add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT, true )
90 add_obsolete_string("fb-aspect-ratio")
91 add_integer("fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
93 add_bool("fb-hw-accel", true, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
95 set_description(N_("GNU/Linux framebuffer video output"))
96 set_capability("vout display", 30)
97 set_callbacks(Open, Close)
100 /*****************************************************************************
102 *****************************************************************************/
103 static picture_pool_t *Pool (vout_display_t *, unsigned);
104 static void Display(vout_display_t *, picture_t *);
105 static int Control(vout_display_t *, int, va_list);
106 static void Manage (vout_display_t *);
109 static int OpenDisplay (vout_display_t *, bool force_resolution);
110 static void CloseDisplay (vout_display_t *);
111 static void SwitchDisplay(int i_signal);
112 static void TextMode (int tty);
113 static void GfxMode (int tty);
115 static int TtyInit(vout_display_t *);
116 static void TtyExit(vout_display_t *);
119 struct vout_display_sys_t {
120 /* System information */
121 int tty; /* tty device handle */
123 struct termios old_termios;
125 /* Original configuration information */
126 struct sigaction sig_usr1; /* USR1 previous handler */
127 struct sigaction sig_usr2; /* USR2 previous handler */
128 struct vt_mode vt_mode; /* previous VT mode */
130 /* Framebuffer information */
131 int fd; /* device handle */
132 struct fb_var_screeninfo old_info; /* original mode information */
133 struct fb_var_screeninfo var_info; /* current mode information */
134 bool has_pan; /* does device supports panning ? */
135 struct fb_cmap fb_cmap; /* original colormap */
136 uint16_t *palette; /* original palette */
137 bool is_hw_accel; /* has hardware support */
139 /* Video information */
142 uint32_t line_length;
147 uint8_t *video_ptr; /* base adress */
148 size_t video_size; /* page size */
151 picture_pool_t *pool;
155 static void ClearScreen(vout_display_sys_t *sys)
157 switch (sys->chroma) {
158 /* XXX: add other chromas */
159 case VLC_CODEC_UYVY: {
160 unsigned int j, size = sys->video_size / 4;
161 uint32_t *ptr = (uint32_t*)((uintptr_t)(sys->video_ptr + 3) & ~3);
162 for(j=0; j < size; j++)
163 ptr[j] = 0x10801080; /* U = V = 16, Y = 128 */
167 memset(sys->video_ptr, 0, sys->video_size);
172 * This function allocates and initializes a FB vout method.
174 static int Open(vlc_object_t *object)
176 vout_display_t *vd = (vout_display_t *)object;
177 vout_display_sys_t *sys;
179 /* Allocate instance and initialize some members */
180 vd->sys = sys = calloc(1, sizeof(*sys));
184 /* Does the framebuffer uses hw acceleration? */
185 sys->is_hw_accel = var_CreateGetBool(vd, "fb-hw-accel");
187 /* Set tty and fb devices */
188 sys->tty = 0; /* 0 == /dev/tty0 == current console */
189 sys->is_tty = var_CreateGetBool(vd, "fb-tty");
190 #if !defined(WIN32) && defined(HAVE_ISATTY)
191 /* Check that stdin is a TTY */
192 if (sys->is_tty && !isatty(0)) {
193 msg_Warn(vd, "fd 0 is not a TTY");
197 msg_Warn(vd, "disabling tty handling, use with caution because "
198 "there is no way to return to the tty.");
201 const int mode = var_CreateGetInteger(vd, "fb-mode");
202 bool force_resolution = true;
222 force_resolution = false;
226 char *chroma = var_CreateGetNonEmptyString(vd, "fb-chroma");
228 sys->chroma = vlc_fourcc_GetCodecFromString(VIDEO_ES, chroma);
231 msg_Dbg(vd, "forcing chroma '%s'", chroma);
233 msg_Warn(vd, "chroma %s invalid, using default", chroma);
240 if (sys->is_tty && TtyInit(vd)) {
246 sys->video_ptr = MAP_FAILED;
250 if (OpenDisplay(vd, force_resolution)) {
251 Close(VLC_OBJECT(vd));
256 video_format_t fmt = vd->fmt;
259 fmt.i_chroma = sys->chroma;
263 msg_Dbg(vd, "%d bppd", sys->var_info.bits_per_pixel);
264 switch (sys->var_info.bits_per_pixel) {
265 case 8: /* FIXME: set the palette */
266 fmt.i_chroma = VLC_CODEC_RGB8;
269 fmt.i_chroma = VLC_CODEC_RGB15;
272 fmt.i_chroma = VLC_CODEC_RGB16;
275 fmt.i_chroma = VLC_CODEC_RGB24;
278 fmt.i_chroma = VLC_CODEC_RGB32;
281 msg_Err(vd, "unknown screendepth %i", sys->var_info.bits_per_pixel);
282 Close(VLC_OBJECT(vd));
285 if (sys->var_info.bits_per_pixel != 8) {
286 fmt.i_rmask = ((1 << sys->var_info.red.length) - 1)
287 << sys->var_info.red.offset;
288 fmt.i_gmask = ((1 << sys->var_info.green.length) - 1)
289 << sys->var_info.green.offset;
290 fmt.i_bmask = ((1 << sys->var_info.blue.length) - 1)
291 << sys->var_info.blue.offset;
295 fmt.i_width = sys->width;
296 fmt.i_height = sys->height;
299 vout_display_info_t info = vd->info;
300 info.has_hide_mouse = true;
307 vd->display = Display;
308 vd->control = Control;
312 vout_display_SendEventFullscreen(vd, true);
313 vout_display_SendEventDisplaySize(vd, fmt.i_width, fmt.i_height, true);
318 * Terminate an output method created by Open
320 static void Close(vlc_object_t *object)
322 vout_display_t *vd = (vout_display_t *)object;
323 vout_display_sys_t *sys = vd->sys;
326 picture_pool_Delete(sys->pool);
327 if (!sys->is_hw_accel && sys->picture)
328 picture_Release(sys->picture);
339 static picture_pool_t *Pool(vout_display_t *vd, unsigned count)
341 vout_display_sys_t *sys = vd->sys;
345 picture_resource_t rsc;
347 memset(&rsc, 0, sizeof(rsc));
348 rsc.p[0].p_pixels = sys->video_ptr;
349 rsc.p[0].i_lines = sys->var_info.yres;
350 rsc.p[0].i_pitch = sys->line_length;
352 sys->picture = picture_NewFromResource(&vd->fmt, &rsc);
357 if (sys->is_hw_accel)
358 sys->pool = picture_pool_New(1, &sys->picture);
360 sys->pool = picture_pool_NewFromFormat(&vd->fmt, count);
364 static void Display(vout_display_t *vd, picture_t *picture)
366 vout_display_sys_t *sys = vd->sys;
368 /* swap the two Y offsets if the drivers supports panning */
370 sys->var_info.yoffset = 0;
371 /*vd->sys->var_info.yoffset = vd->sys->var_info.yres; */
373 /* the X offset should be 0, but who knows ...
374 * some other app might have played with the framebuffer */
375 sys->var_info.xoffset = 0;
377 /* FIXME 'static' is damn wrong and it's dead code ... */
378 static int panned = 0;
380 ioctl(sys->fd, FBIOPAN_DISPLAY, &sys->var_info);
385 if (!sys->is_hw_accel)
386 picture_Copy(sys->picture, picture);
388 picture_Release(picture);
390 static int Control(vout_display_t *vd, int query, va_list args)
392 vout_display_sys_t *sys = vd->sys;
395 case VOUT_DISPLAY_CHANGE_DISPLAY_SIZE: {
396 const vout_display_cfg_t *cfg = va_arg(args, const vout_display_cfg_t *);
397 if (cfg->display.width != sys->width ||
398 cfg->display.height != sys->height)
403 msg_Err(vd, "Unsupported query in vout display fb");
407 static void Manage (vout_display_t *vd)
414 if (vd->i_changes & VOUT_SIZE_CHANGE)
416 msg_Dbg(vd, "reinitializing framebuffer screen");
417 vd->i_changes &= ~VOUT_SIZE_CHANGE;
419 vout_display_SendEventDisplaySize();
421 ClearScreen(vd->sys);
426 /* following functions are local */
427 static int TtyInit(vout_display_t *vd)
429 vout_display_sys_t *sys = vd->sys;
431 struct termios new_termios;
435 /* Set keyboard settings */
436 if (tcgetattr(0, &sys->old_termios) == -1) {
437 msg_Err(vd, "tcgetattr failed");
440 if (tcgetattr(0, &new_termios) == -1) {
441 msg_Err(vd, "tcgetattr failed");
444 /* new_termios.c_lflag &= ~ (ICANON | ISIG);
445 new_termios.c_lflag |= (ECHO | ECHOCTL); */
446 new_termios.c_lflag &= ~ (ICANON);
447 new_termios.c_lflag &= ~(ECHO | ECHOCTL);
448 new_termios.c_iflag = 0;
449 new_termios.c_cc[VMIN] = 1;
450 new_termios.c_cc[VTIME] = 0;
452 if (tcsetattr(0, TCSAFLUSH, &new_termios) == -1) {
453 msg_Err(vd, "tcsetattr failed");
456 ioctl(sys->tty, VT_RELDISP, VT_ACKACQ);
458 /* Set-up tty signal handler to be aware of tty changes */
459 struct sigaction sig_tty;
460 memset(&sig_tty, 0, sizeof(sig_tty));
461 sig_tty.sa_handler = SwitchDisplay;
462 sigemptyset(&sig_tty.sa_mask);
463 if (sigaction(SIGUSR1, &sig_tty, &sys->sig_usr1) ||
464 sigaction(SIGUSR2, &sig_tty, &sys->sig_usr2)) {
465 msg_Err(vd, "cannot set signal handler (%m)");
466 /* FIXME SIGUSR1 could have succeed */
470 /* Set-up tty according to new signal handler */
471 if (-1 == ioctl(sys->tty, VT_GETMODE, &sys->vt_mode)) {
472 msg_Err(vd, "cannot get terminal mode (%m)");
475 struct vt_mode vt_mode = sys->vt_mode;
476 vt_mode.mode = VT_PROCESS;
478 vt_mode.relsig = SIGUSR1;
479 vt_mode.acqsig = SIGUSR2;
481 if (-1 == ioctl(sys->tty, VT_SETMODE, &vt_mode)) {
482 msg_Err(vd, "cannot set terminal mode (%m)");
488 sigaction(SIGUSR1, &sys->sig_usr1, NULL);
489 sigaction(SIGUSR2, &sys->sig_usr2, NULL);
491 tcsetattr(0, 0, &sys->old_termios);
495 static void TtyExit(vout_display_t *vd)
497 vout_display_sys_t *sys = vd->sys;
499 /* Reset the terminal */
500 ioctl(sys->tty, VT_SETMODE, &sys->vt_mode);
502 /* Remove signal handlers */
503 sigaction(SIGUSR1, &sys->sig_usr1, NULL);
504 sigaction(SIGUSR2, &sys->sig_usr2, NULL);
506 /* Reset the keyboard state */
507 tcsetattr(0, 0, &sys->old_termios);
509 /* Return to text mode */
513 /*****************************************************************************
514 * OpenDisplay: initialize framebuffer
515 *****************************************************************************/
516 static int OpenDisplay(vout_display_t *vd, bool force_resolution)
518 vout_display_sys_t *sys = vd->sys;
519 char *psz_device; /* framebuffer device path */
521 /* Open framebuffer device */
522 if (!(psz_device = var_InheritString(vd, FB_DEV_VAR))) {
523 msg_Err(vd, "don't know which fb device to open");
527 sys->fd = utf8_open(psz_device, O_RDWR);
529 msg_Err(vd, "cannot open %s (%m)", psz_device);
535 /* Get framebuffer device information */
536 if (ioctl(sys->fd, FBIOGET_VSCREENINFO, &sys->var_info)) {
537 msg_Err(vd, "cannot get fb info (%m)");
541 sys->old_info = sys->var_info;
543 /* Get some info on the framebuffer itself */
544 if (force_resolution) {
545 sys->var_info.xres = sys->var_info.xres_virtual = sys->width;
546 sys->var_info.yres = sys->var_info.yres_virtual = sys->height;
549 /* Set some attributes */
550 sys->var_info.activate = sys->is_tty ? FB_ACTIVATE_NXTOPEN :
552 sys->var_info.xoffset = 0;
553 sys->var_info.yoffset = 0;
555 if (ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->var_info)) {
556 msg_Err(vd, "cannot set fb info (%m)");
561 struct fb_fix_screeninfo fix_info;
562 /* Get some information again, in the definitive configuration */
563 if (ioctl(sys->fd, FBIOGET_FSCREENINFO, &fix_info) ||
564 ioctl(sys->fd, FBIOGET_VSCREENINFO, &sys->var_info)) {
565 msg_Err(vd, "cannot get additional fb info (%m)");
567 /* Restore fb config */
568 ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
574 /* If the fb has limitations on mode change,
575 * then keep the resolution of the fb */
576 if ((sys->height != sys->var_info.yres) ||
577 (sys->width != sys->var_info.xres)) {
579 "using framebuffer native resolution instead of requested (%ix%i)",
580 sys->width, sys->height);
582 sys->height = sys->var_info.yres;
583 sys->width = sys->var_info.xres_virtual ? sys->var_info.xres_virtual :
585 sys->line_length = fix_info.line_length;
587 /* FIXME: if the image is full-size, it gets cropped on the left
588 * because of the xres / xres_virtual slight difference */
589 msg_Dbg(vd, "%ix%i (virtual %ix%i) (request %ix%i)",
590 sys->var_info.xres, sys->var_info.yres,
591 sys->var_info.xres_virtual,
592 sys->var_info.yres_virtual,
593 sys->width, sys->height);
596 sys->has_pan = (fix_info.ypanstep || fix_info.ywrapstep);
598 switch (sys->var_info.bits_per_pixel) {
600 sys->palette = malloc(8 * 256 * sizeof(uint16_t));
602 /* Restore fb config */
603 ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
608 sys->fb_cmap.start = 0;
609 sys->fb_cmap.len = 256;
610 sys->fb_cmap.red = sys->palette;
611 sys->fb_cmap.green = sys->palette + 256 * sizeof(uint16_t);
612 sys->fb_cmap.blue = sys->palette + 2 * 256 * sizeof(uint16_t);
613 sys->fb_cmap.transp = sys->palette + 3 * 256 * sizeof(uint16_t);
615 /* Save the colormap */
616 ioctl(sys->fd, FBIOGETCMAP, &sys->fb_cmap);
618 sys->bytes_per_pixel = 1;
623 sys->bytes_per_pixel = 2;
627 sys->bytes_per_pixel = 3;
631 sys->bytes_per_pixel = 4;
635 msg_Err(vd, "screen depth %d is not supported",
636 sys->var_info.bits_per_pixel);
638 /* Restore fb config */
639 ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
645 sys->video_size = sys->line_length * sys->var_info.yres_virtual;
647 /* Map a framebuffer at the beginning */
648 sys->video_ptr = mmap(NULL, sys->video_size,
649 PROT_READ | PROT_WRITE, MAP_SHARED, sys->fd, 0);
651 if (sys->video_ptr == MAP_FAILED) {
652 msg_Err(vd, "cannot map video memory (%m)");
654 if (sys->var_info.bits_per_pixel == 8) {
659 /* Restore fb config */
660 ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
669 "framebuffer type=%d, visual=%d, ypanstep=%d, ywrap=%d, accel=%d",
670 fix_info.type, fix_info.visual,
671 fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel);
675 /*****************************************************************************
676 * CloseDisplay: terminate FB video thread output method
677 *****************************************************************************/
678 static void CloseDisplay(vout_display_t *vd)
680 vout_display_sys_t *sys = vd->sys;
682 if (sys->video_ptr != MAP_FAILED) {
684 munmap(sys->video_ptr, sys->video_size);
688 /* Restore palette */
689 if (sys->var_info.bits_per_pixel == 8) {
690 ioctl(sys->fd, FBIOPUTCMAP, &sys->fb_cmap);
695 /* Restore fb config */
696 ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
703 /*****************************************************************************
704 * SwitchDisplay: VT change signal handler
705 *****************************************************************************
706 * This function activates or deactivates the output of the thread. It is
707 * called by the VT driver, on terminal change.
708 *****************************************************************************/
709 static void SwitchDisplay(int i_signal)
711 VLC_UNUSED(i_signal);
715 vlc_mutex_lock(&p_vout_bank->lock);
717 /* XXX: only test the first video output */
718 if (p_vout_bank->i_count)
720 vd = p_vout_bank->pp_vout[0];
724 case SIGUSR1: /* vt has been released */
726 ioctl(sys->tty, VT_RELDISP, 1);
728 case SIGUSR2: /* vt has been acquired */
730 ioctl(sys->tty, VT_RELDISP, VT_ACTIVATE);
731 /* handle blanking */
732 vlc_mutex_lock(&vd->change_lock);
733 vd->i_changes |= VOUT_SIZE_CHANGE;
734 vlc_mutex_unlock(&vd->change_lock);
739 vlc_mutex_unlock(&p_vout_bank->lock);
743 /*****************************************************************************
744 * TextMode and GfxMode : switch tty to text/graphic mode
745 *****************************************************************************
746 * These functions toggle the tty mode.
747 *****************************************************************************/
748 static void TextMode(int tty)
750 /* return to text mode */
751 if (-1 == ioctl(tty, KDSETMODE, KD_TEXT)) {
752 /*msg_Err(vd, "failed ioctl KDSETMODE KD_TEXT");*/
756 static void GfxMode(int tty)
758 /* switch to graphic mode */
759 if (-1 == ioctl(tty, KDSETMODE, KD_GRAPHICS)) {
760 /*msg_Err(vd, "failed ioctl KDSETMODE KD_GRAPHICS");*/