--- /dev/null
+/**
+ * @file xcb.c
+ * @brief X C Bindings video output module for VLC media player
+ */
+/*****************************************************************************
+ * Copyright © 2009 Rémi Denis-Courmont
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2.0
+ * of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ ****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <assert.h>
+
+#include <xcb/xcb.h>
+#include <xcb/xcb_aux.h>
+#include <xcb/xcb_image.h>
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_vout.h>
+#include <vlc_window.h>
+
+#define DISPLAY_TEXT N_("X11 display")
+#define DISPLAY_LONGTEXT N_( \
+ "X11 hardware display to use. By default VLC will " \
+ "use the value of the DISPLAY environment variable.")
+
+static int Open (vlc_object_t *);
+static void Close (vlc_object_t *);
+
+/*
+ * Module descriptor
+ */
+vlc_module_begin ()
+ set_shortname (_("XCB"))
+ set_description (_("(Experimental) XCB video output"))
+ set_category (CAT_VIDEO)
+ set_subcategory (SUBCAT_VIDEO_VOUT)
+ set_capability ("video output", 0)
+ set_callbacks (Open, Close)
+
+ add_string ("x11-display", NULL, NULL,
+ DISPLAY_TEXT, DISPLAY_LONGTEXT, true)
+vlc_module_end ()
+
+struct vout_sys_t
+{
+ xcb_connection_t *conn;
+ xcb_screen_t *screen;
+ vout_window_t *embed; /* VLC window (when windowed) */
+
+ xcb_visualid_t vid;
+ xcb_window_t parent; /* parent X window */
+ xcb_window_t window; /* drawable X window */
+ xcb_gcontext_t gc; /* context to put images */
+};
+
+static int Init (vout_thread_t *);
+static void Deinit (vout_thread_t *);
+static void Display (vout_thread_t *, picture_t *);
+static int Manage (vout_thread_t *);
+
+static int CheckError (vout_thread_t *vout, const char *str,
+ xcb_void_cookie_t ck)
+{
+ xcb_generic_error_t *err;
+
+ err = xcb_request_check (vout->p_sys->conn, ck);
+ if (err)
+ {
+ msg_Err (vout, "%s: X11 error %d", str, err->error_code);
+ return VLC_EGENERIC;
+ }
+ return VLC_SUCCESS;
+}
+
+#define p_vout vout
+
+/**
+ * Probe the X server.
+ */
+static int Open (vlc_object_t *obj)
+{
+ vout_thread_t *vout = (vout_thread_t *)obj;
+ vout_sys_t *p_sys = malloc (sizeof (*p_sys));
+ if (p_sys == NULL)
+ return VLC_ENOMEM;
+
+ vout->p_sys = p_sys;
+ p_sys->conn = NULL;
+#ifndef NDEBUG
+ p_sys->embed = NULL;
+#endif
+
+ /* Connect to X */
+ char *display = var_CreateGetNonEmptyString (vout, "x11-display");
+ int snum;
+ p_sys->conn = xcb_connect (display, &snum);
+ if (xcb_connection_has_error (p_sys->conn) /*== NULL*/)
+ {
+ msg_Err (vout, "cannot connect to X server %s",
+ display ? display : "");
+ goto error;
+ }
+
+ /* Get the preferred screen */
+ xcb_screen_t *scr = xcb_aux_get_screen (p_sys->conn, snum);
+ p_sys->screen = scr;
+ assert (p_sys->screen);
+ msg_Dbg (vout, "using screen %d (depth %"PRIu8")", snum, scr->root_depth);
+
+ if (strchr ("\x08\x0f\x10\x18\x20", scr->root_depth) == NULL)
+ {
+ msg_Err (vout, "unsupported %"PRIu8"-bits color depth",
+ scr->root_depth);
+ goto error;
+ }
+
+ /* Determine the visual (color depth and palette) */
+ xcb_visualtype_t *vt = NULL;
+ if ((vt = xcb_aux_find_visual_by_attrs (scr, XCB_VISUAL_CLASS_TRUE_COLOR,
+ scr->root_depth)) != NULL)
+ msg_Dbg (vout, "using TrueColor visual ID %d", (int)vt->visual_id);
+ else
+ if ((vt = xcb_aux_find_visual_by_attrs (scr,XCB_VISUAL_CLASS_STATIC_COLOR,
+ scr->root_depth)) != NULL)
+ msg_Dbg (vout, "using static color visual ID %d", (int)vt->visual_id);
+ else
+ {
+ vt = xcb_aux_get_visualtype (p_sys->conn, snum, scr->root_visual);
+ assert (vt);
+ msg_Err (vout, "unsupported visual class %"PRIu8, vt->_class);
+ goto error;
+ }
+ p_sys->vid = vt->visual_id;
+
+ vout->pf_init = Init;
+ vout->pf_end = Deinit;
+ vout->pf_display = Display;
+ vout->pf_manage = Manage;
+ return VLC_SUCCESS;
+
+error:
+ Close (obj);
+ return VLC_EGENERIC;
+}
+
+
+/**
+ * Disconnect from the X server.
+ */
+static void Close (vlc_object_t *obj)
+{
+ vout_thread_t *vout = (vout_thread_t *)obj;
+ vout_sys_t *p_sys = vout->p_sys;
+
+ assert (p_sys->embed == NULL);
+ if (p_sys->conn)
+ xcb_disconnect (p_sys->conn);
+ free (p_sys);
+}
+
+static void PictureRelease (picture_t *pic)
+{
+ xcb_image_t *img = (xcb_image_t *)pic->p_sys;
+ xcb_image_destroy (img);
+}
+
+/**
+ * Allocate drawable window and picture buffers.
+ */
+static int Init (vout_thread_t *vout)
+{
+ vout_sys_t *p_sys = vout->p_sys;
+ const xcb_screen_t *screen = p_sys->screen;
+ unsigned x, y, width, height;
+
+ /* Determine parent window */
+ if (vout->b_fullscreen)
+ {
+ p_sys->embed = NULL;
+ p_sys->parent = screen->root;
+ width = screen->width_in_pixels;
+ height = screen->height_in_pixels;
+ }
+ else
+ {
+ p_sys->embed = vout_RequestWindow (vout, &(int){ 0 }, &(int){ 0 },
+ &width, &height);
+ if (p_sys->embed == NULL)
+ {
+ msg_Err (vout, "cannot get window");
+ return VLC_EGENERIC;
+ }
+ p_sys->parent = (intptr_t)p_sys->embed->handle;
+ }
+
+ /* Determine our input format */
+ uint8_t depth = screen->root_depth, bpp = depth;
+ switch (depth)
+ {
+ case 24:
+ bpp = 32;
+ case 32: /* FIXME: untested */
+ vout->output.i_chroma = VLC_FOURCC ('R', 'V', '3', '2');
+ break;
+
+ case 16:
+ vout->output.i_chroma = VLC_FOURCC ('R', 'V', '1', '6');
+ break;
+
+ case 15:
+ bpp = 16;
+ vout->output.i_chroma = VLC_FOURCC ('R', 'V', '1', '5');
+ break;
+
+ case 8: /* FIXME: VLC cannot convert */
+ vout->output.i_chroma = VLC_FOURCC ('R', 'G', 'B', '2');
+ break;
+
+ default:
+ assert (0);
+ }
+
+ vout_PlacePicture (vout, width, height, &x, &y, &width, &height);
+ vout->output.i_width = width;
+ vout->output.i_height = height;
+ assert (height > 0);
+ vout->output.i_aspect = width * VOUT_ASPECT_FACTOR / height;
+ /* FIXME: I don't get the subtlety between output and fmt_out here */
+
+ /* Create window */
+ xcb_void_cookie_t c;
+ xcb_window_t window = xcb_generate_id (p_sys->conn);
+
+ p_sys->window = window;
+ c = xcb_create_window_checked (p_sys->conn, screen->root_depth, window,
+ p_sys->parent, x, y, width, height, 0,
+ XCB_WINDOW_CLASS_INPUT_OUTPUT,
+ screen->root_visual, 0, NULL);
+ if (CheckError (vout, "cannot create X11 window", c))
+ goto error;
+ msg_Dbg (vout, "using X11 window %08"PRIx32, p_sys->window);
+ xcb_map_window (p_sys->conn, window);
+
+ /* Create graphic context (I wonder why the heck do we need this) */
+ p_sys->gc = xcb_generate_id (p_sys->conn);
+ xcb_create_gc (p_sys->conn, p_sys->gc, p_sys->window, 0, NULL);
+ msg_Dbg (vout, "using X11 graphic context %08"PRIx32, p_sys->gc);
+ xcb_flush (p_sys->conn);
+
+ /* Allocate picture buffers */
+ do
+ {
+ picture_t *pic = vout->p_picture + I_OUTPUTPICTURES;
+
+ assert (pic->i_status == FREE_PICTURE);
+ vout_InitPicture (vout, pic, vout->output.i_chroma,
+ vout->output.i_width, vout->output.i_height,
+ vout->output.i_aspect);
+
+ xcb_image_t *img;
+ const unsigned real_width = pic->p->i_pitch / (bpp >> 3);
+ /* FIXME: anyway to getthing more intuitive than that?? */
+
+ /* NOTE: 32-bits scanline_pad assumed, FIXME? (see xdpyinfo) */
+ img = xcb_image_create (real_width, height, XCB_IMAGE_FORMAT_Z_PIXMAP,
+ 32, depth, bpp, bpp,
+#ifdef WORDS_BIGENDIAN
+ XCB_IMAGE_ORDER_MSB_FIRST,
+#else
+ XCB_IMAGE_ORDER_LSB_FIRST,
+#endif
+ XCB_IMAGE_ORDER_MSB_FIRST,
+ NULL, 0, NULL);
+ if (!img)
+ goto error;
+
+ pic->p_sys = (picture_sys_t *)img;
+ pic->pf_release = PictureRelease;
+ pic->p->p_pixels = img->data;
+
+ pic->i_status = DESTROYED_PICTURE;
+ pic->i_type = DIRECT_PICTURE;
+ PP_OUTPUTPICTURE[I_OUTPUTPICTURES++] = pic;
+ }
+ while (I_OUTPUTPICTURES < 2);
+
+ return VLC_SUCCESS;
+
+error:
+ Deinit (vout);
+ return VLC_EGENERIC;
+}
+
+/**
+ * Free picture buffers.
+ */
+static void Deinit (vout_thread_t *vout)
+{
+ vout_sys_t *p_sys = vout->p_sys;
+
+ while (I_OUTPUTPICTURES > 0)
+ picture_Release (PP_OUTPUTPICTURE[--I_OUTPUTPICTURES]);
+
+ xcb_unmap_window (p_sys->conn, p_sys->window);
+ xcb_destroy_window (p_sys->conn, p_sys->window);
+ vout_ReleaseWindow (p_sys->embed);
+ p_sys->embed = NULL;
+}
+
+/**
+ * Sends an image to the X server.
+ */
+static void Display (vout_thread_t *vout, picture_t *pic)
+{
+ vout_sys_t *p_sys = vout->p_sys;
+ xcb_image_t *img = (xcb_image_t *)pic->p_sys;
+ xcb_image_t *native = xcb_image_native (p_sys->conn, img, 1);
+
+ if (native == NULL)
+ {
+ msg_Err (vout, "image conversion failure");
+ return;
+ }
+
+ xcb_image_put (p_sys->conn, p_sys->window, p_sys->gc, native, 0, 0, 0);
+ xcb_flush (p_sys->conn);
+
+ if (native != img)
+ {
+ /*msg_Warn (vout, "image not in native X11 pixmap format");*/
+ xcb_image_destroy (native);
+ }
+}
+
+/**
+ * Process incoming X events.
+ */
+static int Manage (vout_thread_t *vout)
+{
+ vout_sys_t *p_sys = vout->p_sys;
+ xcb_generic_event_t *ev;
+
+ while ((ev = xcb_poll_for_event (p_sys->conn)) != NULL)
+ {
+ switch (ev->response_type & ~0x80)
+ {
+ default:
+ msg_Dbg (vout, "unhandled event %02x", (unsigned)ev->response_type);
+ }
+ free (ev);
+ }
+
+ if (xcb_connection_has_error (p_sys->conn))
+ {
+ msg_Err (vout, "X server failure");
+ return VLC_EGENERIC;
+ }
+ return VLC_SUCCESS;
+}
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