--- /dev/null
+/**
+ * @file xvideo.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/shm.h>
+#include <xcb/xv.h>
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_vout.h>
+#include <vlc_window.h>
+
+#include "xcb_vlc.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.")
+
+#define SHM_TEXT N_("Use shared memory")
+#define SHM_LONGTEXT N_( \
+ "Use shared memory to communicate between VLC and the X server.")
+
+static int Open (vlc_object_t *);
+static void Close (vlc_object_t *);
+
+/*
+ * Module descriptor
+ */
+vlc_module_begin ()
+ set_shortname (N_("XVideo"))
+ set_description (N_("(Experimental) XVideo 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)
+ add_bool ("x11-shm", true, NULL, SHM_TEXT, SHM_LONGTEXT, true)
+ add_shortcut ("xcb-xv")
+vlc_module_end ()
+
+struct vout_sys_t
+{
+ xcb_connection_t *conn;
+ xcb_xv_query_adaptors_reply_t *adaptors;
+ vout_window_t *embed;/* VLC window */
+
+ xcb_window_t window; /* drawable X window */
+ xcb_gcontext_t gc; /* context to put images */
+ xcb_xv_port_t port; /* XVideo port */
+ uint32_t id; /* XVideo format */
+ uint16_t width; /* display width */
+ uint16_t height; /* display height */
+ bool shm; /* whether to use MIT-SHM */
+};
+
+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 *);
+
+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;
+}
+
+/**
+ * Check that the X server supports the XVideo extension.
+ */
+static bool CheckXVideo (vout_thread_t *vout, xcb_connection_t *conn)
+{
+ xcb_xv_query_extension_reply_t *r;
+ xcb_xv_query_extension_cookie_t ck = xcb_xv_query_extension (conn);
+ bool ok = false;
+
+ r = xcb_xv_query_extension_reply (conn, ck, NULL);
+ if (r != NULL)
+ { /* We need XVideo 2.2 for PutImage */
+ if ((r->major > 2) || (r->major == 2 && r->minor >= 2))
+ {
+ msg_Dbg (vout, "using XVideo extension v%"PRIu8".%"PRIu8,
+ r->major, r->minor);
+ ok = true;
+ }
+ else
+ msg_Dbg (vout, "XVideo extension too old (v%"PRIu8".%"PRIu8,
+ r->major, r->minor);
+ free (r);
+ }
+ else
+ msg_Dbg (vout, "XVideo extension not available");
+ return ok;
+}
+
+/**
+ * Get a list of XVideo adaptors for a given window.
+ */
+static xcb_xv_query_adaptors_reply_t *GetAdaptors (vout_window_t *wnd,
+ xcb_connection_t *conn)
+{
+ xcb_xv_query_adaptors_cookie_t ck;
+
+ ck = xcb_xv_query_adaptors (conn, wnd->handle.xid);
+ return xcb_xv_query_adaptors_reply (conn, ck, NULL);
+}
+
+#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;
+
+ /* Connect to X */
+ p_sys->conn = Connect (obj);
+ if (p_sys->conn == NULL)
+ return VLC_EGENERIC;
+
+ if (!CheckXVideo (vout, p_sys->conn))
+ {
+ msg_Warn (vout, "Please enable XVideo 2.2 for faster video display");
+ xcb_disconnect (p_sys->conn);
+ return VLC_EGENERIC;
+ }
+
+ const xcb_screen_t *screen;
+ p_sys->embed = GetWindow (vout, p_sys->conn, &screen, &p_sys->shm);
+ if (p_sys->embed == NULL)
+ {
+ xcb_disconnect (p_sys->conn);
+ return VLC_EGENERIC;
+ }
+
+ /* Cache adaptors infos */
+ p_sys->adaptors = GetAdaptors (p_sys->embed, p_sys->conn);
+ if (p_sys->adaptors == NULL)
+ goto error;
+
+ /* Create window */
+ {
+ const uint32_t mask =
+ /* XCB_CW_EVENT_MASK */
+ XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
+ XCB_EVENT_MASK_POINTER_MOTION;
+ xcb_void_cookie_t c;
+ xcb_window_t window = xcb_generate_id (p_sys->conn);
+
+ c = xcb_create_window_checked (p_sys->conn, screen->root_depth, window,
+ p_sys->embed->handle.xid, 0, 0, 1, 1, 0,
+ XCB_WINDOW_CLASS_INPUT_OUTPUT,
+ screen->root_visual,
+ XCB_CW_EVENT_MASK, &mask);
+ if (CheckError (vout, "cannot create X11 window", c))
+ goto error;
+ p_sys->window = window;
+ msg_Dbg (vout, "using X11 window %08"PRIx32, p_sys->window);
+ xcb_map_window (p_sys->conn, window);
+ }
+
+ 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);
+
+ 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;
+
+ free (p_sys->adaptors);
+ vout_ReleaseWindow (p_sys->embed);
+ xcb_disconnect (p_sys->conn);
+ free (p_sys);
+}
+
+static int QueryBestSize (vout_thread_t *vout,
+ unsigned *restrict width, unsigned *restrict height)
+{
+ vout_sys_t *p_sys = vout->p_sys;
+ xcb_xv_query_best_size_reply_t *r;
+ xcb_xv_query_best_size_cookie_t ck;
+
+ ck = xcb_xv_query_best_size (p_sys->conn, p_sys->port,
+ vout->fmt_in.i_visible_width,
+ vout->fmt_in.i_visible_height,
+ *width, *height, false);
+ r = xcb_xv_query_best_size_reply (p_sys->conn, ck, NULL);
+ if (r == NULL)
+ return VLC_EGENERIC;
+
+ msg_Dbg (vout, "best size: %ux%u -> %ux%u", *width, *height,
+ r->actual_width, r->actual_height);
+ *width = r->actual_width;
+ *height = r->actual_height;
+ free (r);
+ return VLC_SUCCESS;
+}
+
+
+static vlc_fourcc_t ParseFormat (vout_thread_t *vout,
+ const xcb_xv_image_format_info_t *restrict f)
+{
+ if (f->byte_order != ORDER && f->bpp != 8)
+ return 0; /* Argh! */
+
+ switch (f->type)
+ {
+ case XCB_XV_IMAGE_FORMAT_INFO_TYPE_RGB:
+ switch (f->num_planes)
+ {
+ case 1:
+ switch (f->bpp)
+ {
+ case 32:
+ if (f->depth == 24)
+ return VLC_FOURCC ('R', 'V', '3', '2');
+ break;
+ case 24:
+ if (f->depth == 24)
+ return VLC_FOURCC ('R', 'V', '2', '4');
+ break;
+ case 16:
+ if (f->depth == 16)
+ return VLC_FOURCC ('R', 'V', '1', '6');
+ if (f->depth == 15)
+ return VLC_FOURCC ('R', 'V', '1', '5');
+ break;
+ case 8:
+ if (f->depth == 8)
+ return VLC_FOURCC ('R', 'G', 'B', '2');
+ break;
+ }
+ break;
+ }
+ msg_Err (vout, "unknown XVideo RGB format %"PRIx32" (%.4s)",
+ f->id, f->guid);
+ msg_Dbg (vout, " %"PRIu8" planes, %"PRIu8" bits/pixel, "
+ "depth %"PRIu8, f->num_planes, f->bpp, f->depth);
+ break;
+
+ case XCB_XV_IMAGE_FORMAT_INFO_TYPE_YUV:
+ if (f->u_sample_bits != f->v_sample_bits
+ || f->vhorz_u_period != f->vhorz_v_period
+ || f->vvert_u_period != f->vvert_v_period
+ || f->y_sample_bits != 8 || f->u_sample_bits != 8
+ || f->vhorz_y_period != 1 || f->vvert_y_period != 1)
+ goto bad;
+ switch (f->num_planes)
+ {
+ case 1:
+ switch (f->bpp)
+ {
+ /*untested: case 24:
+ if (f->vhorz_u_period == 1 && f->vvert_u_period == 1)
+ return VLC_FOURCC ('I', '4', '4', '4');
+ break;*/
+ case 16:
+ if (f->vhorz_u_period == 2 && f->vvert_u_period == 1)
+ {
+ if (!strcmp ((const char *)f->vcomp_order, "YUYV"))
+ return VLC_FOURCC ('Y', 'U', 'Y', '2');
+ if (!strcmp ((const char *)f->vcomp_order, "UYVY"))
+ return VLC_FOURCC ('U', 'Y', 'V', 'Y');
+ }
+ break;
+ }
+ break;
+ case 3:
+ switch (f->bpp)
+ {
+ case 12:
+ if (f->vhorz_u_period == 2 && f->vvert_u_period == 2)
+ {
+ if (!strcmp ((const char *)f->vcomp_order, "YVU"))
+ return VLC_FOURCC ('Y', 'V', '1', '2');
+ if (!strcmp ((const char *)f->vcomp_order, "YUV"))
+ return VLC_FOURCC ('I', '4', '2', '0');
+ }
+ }
+ break;
+ }
+ bad:
+ msg_Err (vout, "unknown XVideo YUV format %"PRIx32" (%.4s)", f->id,
+ f->guid);
+ msg_Dbg (vout, " %"PRIu8" planes, %"PRIu32" bits/pixel, "
+ "%"PRIu32"/%"PRIu32"/%"PRIu32" bits/sample", f->num_planes,
+ f->bpp, f->y_sample_bits, f->u_sample_bits, f->v_sample_bits);
+ msg_Dbg (vout, " period: %"PRIu32"/%"PRIu32"/%"PRIu32"x"
+ "%"PRIu32"/%"PRIu32"/%"PRIu32,
+ f->vhorz_y_period, f->vhorz_u_period, f->vhorz_v_period,
+ f->vvert_y_period, f->vvert_u_period, f->vvert_v_period);
+ msg_Warn (vout, " order: %.32s", f->vcomp_order);
+ break;
+ }
+ return 0;
+}
+
+
+/**
+ * Allocate drawable window and picture buffers.
+ */
+static int Init (vout_thread_t *vout)
+{
+ vout_sys_t *p_sys = vout->p_sys;
+ unsigned x, y, width, height;
+
+ /* FIXME: check max image size */
+ xcb_xv_adaptor_info_iterator_t it;
+ for (it = xcb_xv_query_adaptors_info_iterator (p_sys->adaptors);
+ it.rem > 0;
+ xcb_xv_adaptor_info_next (&it))
+ {
+ const xcb_xv_adaptor_info_t *a = it.data;
+
+ /* FIXME: Open() should fail if none of the ports are usable to VLC */
+ if (!(a->type & XCB_XV_TYPE_IMAGE_MASK))
+ continue;
+
+ xcb_xv_list_image_formats_reply_t *r;
+ r = xcb_xv_list_image_formats_reply (p_sys->conn,
+ xcb_xv_list_image_formats (p_sys->conn, a->base_id), NULL);
+ if (r == NULL)
+ continue;
+
+ const xcb_xv_image_format_info_t *f, *end;
+ f = xcb_xv_list_image_formats_format (r);
+ end = f + xcb_xv_list_image_formats_format_length (r);
+ for (; f < end; f++)
+ {
+ vlc_fourcc_t chroma = ParseFormat (vout, f);
+ if (!chroma)
+ continue;
+
+ if (chroma == vout->fmt_in.i_chroma)
+ {
+ vout->output.i_chroma = chroma;
+ p_sys->id = f->id;
+ break;
+ }
+ /* TODO: RGB masks */
+ }
+
+ free (r);
+ /* TODO: grab port */
+
+ msg_Dbg (vout, "using image format 0x%"PRIx32, p_sys->id);
+ p_sys->port = a->base_id;
+ msg_Dbg (vout, "using port %"PRIu32, p_sys->port);
+ break;
+ }
+
+ /* TODO: fallback to RV24 or I420 */
+ if (!vout->output.i_chroma)
+ return VLC_EGENERIC; /* no usable adaptor */
+
+ if (GetWindowSize (p_sys->embed, p_sys->conn, &width, &height))
+ return VLC_EGENERIC;
+ vout_PlacePicture (vout, width, height, &x, &y, &width, &height);
+ if (QueryBestSize (vout, &width, &height))
+ return VLC_EGENERIC;
+
+ const uint32_t values[] = { x, y, width, height, };
+ xcb_configure_window (p_sys->conn, p_sys->window,
+ XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
+ XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
+ values);
+ p_sys->height = height;
+ p_sys->width = width;
+
+ vout->fmt_out.i_chroma = vout->output.i_chroma;
+ vout->fmt_out.i_visible_width = vout->fmt_in.i_visible_width;
+ vout->fmt_out.i_visible_height = vout->fmt_in.i_visible_height;
+ vout->fmt_out.i_sar_num = vout->fmt_out.i_sar_den = 1;
+
+ vout->output.i_width = vout->fmt_out.i_width = vout->fmt_in.i_width;
+ vout->output.i_height = vout->fmt_out.i_height = vout->fmt_in.i_height;
+ vout->fmt_out.i_x_offset = vout->fmt_in.i_x_offset;
+ p_vout->fmt_out.i_y_offset = vout->fmt_in.i_y_offset;
+
+ assert (height > 0);
+ vout->output.i_aspect = vout->fmt_out.i_aspect =
+ width * VOUT_ASPECT_FACTOR / height;
+
+ /* Allocate picture buffers */
+ I_OUTPUTPICTURES = 0;
+ for (size_t index = 0; I_OUTPUTPICTURES < 2; index++)
+ {
+ picture_t *pic = vout->p_picture + index;
+
+ if (index > sizeof (vout->p_picture) / sizeof (pic))
+ break;
+ if (pic->i_status != FREE_PICTURE)
+ continue;
+ if (PictureInit (vout, pic, p_sys->shm ? p_sys->conn : NULL))
+ break;
+ PP_OUTPUTPICTURE[I_OUTPUTPICTURES++] = pic;
+ }
+ xcb_flush (p_sys->conn);
+ return VLC_SUCCESS;
+}
+
+/**
+ * Free picture buffers.
+ */
+static void Deinit (vout_thread_t *vout)
+{
+ vout_sys_t *p_sys = vout->p_sys;
+
+ for (int i = 0; i < I_OUTPUTPICTURES; i++)
+ PictureDeinit (PP_OUTPUTPICTURE[i], p_sys->conn);
+}
+
+/**
+ * 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_shm_seg_t segment = (uintptr_t)pic->p_sys;
+
+ if (segment)
+ xcb_xv_shm_put_image (p_sys->conn, p_sys->port, p_sys->window,
+ p_sys->gc, segment, p_sys->id, 0,
+ /* Src: */ 0, 0,
+ pic->p->i_visible_pitch / pic->p->i_pixel_pitch,
+ pic->p->i_visible_lines,
+ /* Dst: */ 0, 0, p_sys->width, p_sys->height,
+ /* Memory: */
+ pic->p->i_pitch / pic->p->i_pixel_pitch,
+ pic->p->i_lines, false);
+ else
+ xcb_xv_put_image (p_sys->conn, p_sys->port, p_sys->window,
+ p_sys->gc, p_sys->id,
+ 0, 0,
+ pic->p->i_visible_pitch / pic->p->i_pixel_pitch,
+ pic->p->i_visible_lines,
+ 0, 0, p_sys->width, p_sys->height,
+ pic->p->i_pitch / pic->p->i_pixel_pitch,
+ pic->p->i_lines,
+ pic->p->i_pitch * pic->p->i_lines, pic->p->p_pixels);
+ xcb_flush (p_sys->conn);
+}
+
+/**
+ * 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)
+ ProcessEvent (vout, p_sys->conn, p_sys->window, ev);
+
+ if (xcb_connection_has_error (p_sys->conn))
+ {
+ msg_Err (vout, "X server failure");
+ return VLC_EGENERIC;
+ }
+ return VLC_SUCCESS;
+}
+
+void
+HandleParentStructure (vout_thread_t *vout, xcb_connection_t *conn,
+ xcb_window_t xid, xcb_configure_notify_event_t *ev)
+{
+ unsigned width, height, x, y;
+
+ vout_PlacePicture (vout, ev->width, ev->height, &x, &y, &width, &height);
+
+ /* Move the picture within the window */
+ const uint32_t values[] = { x, y, width, height, };
+ xcb_configure_window (conn, xid,
+ XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y
+ | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
+ values);
+ vout->p_sys->width = width;
+ vout->p_sys->height = height;
+}
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