/**
* Probes and initializes.
*/
static int Open (vlc_object_t *obj)
{
demux_t *demux = (demux_t *)obj;
demux_sys_t *p_sys = malloc (sizeof (*p_sys));
if (p_sys == NULL)
return VLC_ENOMEM;
demux->p_sys = p_sys;
/* Connect to X server */
char *display = var_InheritString (obj, "x11-display");
int snum;
xcb_connection_t *conn = xcb_connect (display, &snum);
free (display);
if (xcb_connection_has_error (conn))
{
free (p_sys);
return VLC_EGENERIC;
}
p_sys->conn = conn;
/* Find configured screen */
if (!strcmp (demux->psz_access, "screen"))
{
const xcb_setup_t *setup = xcb_get_setup (conn);
const xcb_screen_t *scr = NULL;
for (xcb_screen_iterator_t i = xcb_setup_roots_iterator (setup);
i.rem > 0; xcb_screen_next (&i))
{
if (snum == 0)
{
scr = i.data;
break;
}
snum--;
}
if (scr == NULL)
{
msg_Err (obj, "bad X11 screen number");
goto error;
}
p_sys->window = scr->root;
}
else
/* Determine capture window */
if (!strcmp (demux->psz_access, "window"))
{
char *end;
unsigned long ul = strtoul (demux->psz_location, &end, 0);
if (*end || ul > 0xffffffff)
{
msg_Err (obj, "bad X11 drawable %s", demux->psz_location);
goto error;
}
p_sys->window = ul;
xcb_composite_query_version_reply_t *r =
xcb_composite_query_version_reply (conn,
xcb_composite_query_version (conn, 0, 4), NULL);
if (r == NULL || r->minor_version < 2)
{
msg_Err (obj, "X Composite extension not available");
free (r);
goto error;
}
msg_Dbg (obj, "using Composite extension v%"PRIu32".%"PRIu32,
r->major_version, r->minor_version);
free (r);
xcb_composite_redirect_window (conn, p_sys->window,
XCB_COMPOSITE_REDIRECT_AUTOMATIC);
}
else
goto error;
/* Window properties */
p_sys->pixmap = xcb_generate_id (conn);
p_sys->segment = xcb_generate_id (conn);
p_sys->shm = CheckSHM (conn);
p_sys->w = var_InheritInteger (obj, "screen-width");
p_sys->h = var_InheritInteger (obj, "screen-height");
if (p_sys->w != 0 || p_sys->h != 0)
p_sys->follow_mouse = var_InheritBool (obj, "screen-follow-mouse");
else /* Following mouse is meaningless if width&height are dynamic. */
p_sys->follow_mouse = false;
if (!p_sys->follow_mouse) /* X and Y are meaningless if following mouse */
{
p_sys->x = var_InheritInteger (obj, "screen-left");
p_sys->y = var_InheritInteger (obj, "screen-top");
}
/* Initializes format */
p_sys->rate = var_InheritFloat (obj, "screen-fps");
if (!p_sys->rate)
goto error;
mtime_t interval = (float)CLOCK_FREQ / p_sys->rate;
if (!interval)
goto error;
p_sys->cur_w = 0;
p_sys->cur_h = 0;
p_sys->bpp = 0;
p_sys->es = NULL;
if (vlc_timer_create (&p_sys->timer, Demux, demux))
goto error;
vlc_timer_schedule (p_sys->timer, false, 1, interval);
/* Initializes demux */
demux->pf_demux = NULL;
demux->pf_control = Control;
return VLC_SUCCESS;
error:
xcb_disconnect (p_sys->conn);
free (p_sys);
return VLC_EGENERIC;
}
/**
* Probe the X server.
*/
static int Open (vlc_object_t *obj)
{
vout_display_t *vd = (vout_display_t *)obj;
vout_display_sys_t *p_sys = malloc (sizeof (*p_sys));
if (p_sys == NULL)
return VLC_ENOMEM;
vd->sys = p_sys;
p_sys->pool = NULL;
/* Get window, connect to X server */
const xcb_screen_t *scr;
p_sys->embed = GetWindow (vd, &p_sys->conn, &scr, &(uint8_t){ 0 });
if (p_sys->embed == NULL)
{
free (p_sys);
return VLC_EGENERIC;
}
const xcb_setup_t *setup = xcb_get_setup (p_sys->conn);
p_sys->byte_order = setup->image_byte_order;
/* Determine our pixel format */
xcb_visualid_t vid = 0;
p_sys->depth = 0;
for (const xcb_format_t *fmt = xcb_setup_pixmap_formats (setup),
*end = fmt + xcb_setup_pixmap_formats_length (setup);
fmt < end;
fmt++)
{
if (fmt->depth <= p_sys->depth)
continue; /* no better than earlier format */
video_format_t fmt_pic = vd->fmt;
/* Check that the pixmap format is supported by VLC. */
switch (fmt->depth)
{
case 32:
if (fmt->bits_per_pixel != 32)
continue;
#ifdef FIXED_VLC_RGBA_MASK
fmt_pic.i_chroma = VLC_CODEC_RGBA;
break;
#else
msg_Dbg (vd, "X11 visual with alpha-channel not supported");
continue;
#endif
case 24:
if (fmt->bits_per_pixel == 32)
fmt_pic.i_chroma = VLC_CODEC_RGB32;
else if (fmt->bits_per_pixel == 24)
fmt_pic.i_chroma = VLC_CODEC_RGB24;
else
continue;
break;
case 16:
if (fmt->bits_per_pixel != 16)
continue;
fmt_pic.i_chroma = VLC_CODEC_RGB16;
break;
case 15:
if (fmt->bits_per_pixel != 16)
continue;
fmt_pic.i_chroma = VLC_CODEC_RGB15;
break;
case 8:
if (fmt->bits_per_pixel != 8)
continue;
fmt_pic.i_chroma = VLC_CODEC_RGB8;
break;
default:
continue;
}
/* VLC pads lines to 16 pixels internally */
if ((fmt->bits_per_pixel << 4) % fmt->scanline_pad)
continue;
/* Byte sex is a non-issue for 8-bits. It can be worked around with
* RGB masks for 24-bits. Too bad for 15-bits and 16-bits. */
if (fmt->bits_per_pixel == 16 && setup->image_byte_order != ORDER)
continue;
/* Check that the selected screen supports this depth */
const xcb_depth_t *d = FindDepth (scr, fmt->depth);
if (d == NULL)
continue;
/* Find a visual type for the selected depth */
const xcb_visualtype_t *vt = xcb_depth_visuals (d);
/* First try True Color class */
for (int i = xcb_depth_visuals_length (d); i > 0; i--)
{
if (vt->_class == XCB_VISUAL_CLASS_TRUE_COLOR)
{
fmt_pic.i_rmask = vt->red_mask;
fmt_pic.i_gmask = vt->green_mask;
fmt_pic.i_bmask = vt->blue_mask;
goto found_visual;
}
vt++;
}
/* Then try Static Gray class */
if (fmt->depth == 8)
for (int i = xcb_depth_visuals_length (d); i > 0 && !vid; i--)
{
if (vt->_class == XCB_VISUAL_CLASS_STATIC_GRAY)
goto found_grey;
vt++;
}
continue; /* Fail: unusable pixel format */
found_grey:
fmt_pic.i_chroma = VLC_CODEC_GREY;
found_visual:
p_sys->bpp = fmt->bits_per_pixel;
p_sys->pad = fmt->scanline_pad;
p_sys->depth = fmt->depth;
vd->fmt = fmt_pic;
vid = vt->visual_id;
}
if (!vid)
{
msg_Err (obj, "no supported pixel format & visual");
goto error;
}
msg_Dbg (vd, "using X11 visual ID 0x%"PRIx32, vid);
msg_Dbg (vd, " %"PRIu8" bits depth", p_sys->depth);
msg_Dbg (vd, " %"PRIu8" bits per pixel", p_sys->bpp);
msg_Dbg (vd, " %"PRIu8" bits line pad", p_sys->pad);
/* Create colormap (needed to select non-default visual) */
xcb_colormap_t cmap;
if (vid != scr->root_visual)
{
cmap = xcb_generate_id (p_sys->conn);
xcb_create_colormap (p_sys->conn, XCB_COLORMAP_ALLOC_NONE,
cmap, scr->root, vid);
}
else
cmap = scr->default_colormap;
/* Create window */
unsigned width, height;
if (GetWindowSize (p_sys->embed, p_sys->conn, &width, &height))
goto error;
p_sys->window = xcb_generate_id (p_sys->conn);
p_sys->gc = xcb_generate_id (p_sys->conn);
xcb_pixmap_t pixmap = xcb_generate_id (p_sys->conn);
{
const uint32_t mask =
XCB_CW_BACK_PIXMAP |
XCB_CW_BACK_PIXEL |
XCB_CW_BORDER_PIXMAP |
XCB_CW_BORDER_PIXEL |
XCB_CW_EVENT_MASK |
XCB_CW_COLORMAP;
const uint32_t values[] = {
/* XCB_CW_BACK_PIXMAP */
pixmap,
/* XCB_CW_BACK_PIXEL */
scr->black_pixel,
/* XCB_CW_BORDER_PIXMAP */
pixmap,
/* XCB_CW_BORDER_PIXEL */
scr->black_pixel,
/* XCB_CW_EVENT_MASK */
XCB_EVENT_MASK_VISIBILITY_CHANGE,
/* XCB_CW_COLORMAP */
cmap,
};
xcb_void_cookie_t c;
xcb_create_pixmap (p_sys->conn, p_sys->depth, pixmap, scr->root, 1, 1);
c = xcb_create_window_checked (p_sys->conn, p_sys->depth,
p_sys->window,
p_sys->embed->handle.xid, 0, 0,
width, height, 0,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
vid, mask, values);
xcb_map_window (p_sys->conn, p_sys->window);
/* Create graphic context (I wonder why the heck do we need this) */
xcb_create_gc (p_sys->conn, p_sys->gc, p_sys->window, 0, NULL);
if (CheckError (vd, p_sys->conn, "cannot create X11 window", c))
goto error;
}
msg_Dbg (vd, "using X11 window %08"PRIx32, p_sys->window);
msg_Dbg (vd, "using X11 graphic context %08"PRIx32, p_sys->gc);
p_sys->cursor = CreateBlankCursor (p_sys->conn, scr);
p_sys->visible = false;
CheckSHM (obj, p_sys->conn, &p_sys->shm);
/* */
vout_display_info_t info = vd->info;
info.has_pictures_invalid = true;
/* Setup vout_display_t once everything is fine */
vd->info = info;
vd->pool = Pool;
vd->prepare = NULL;
vd->display = Display;
vd->control = Control;
vd->manage = Manage;
/* */
vout_display_SendEventFullscreen (vd, false);
vout_display_SendEventDisplaySize (vd, width, height, false);
return VLC_SUCCESS;
error:
Close (obj);
return VLC_EGENERIC;
}
