3 * @brief X C Bindings video output module for VLC media player
5 /*****************************************************************************
6 * Copyright © 2009 Rémi Denis-Courmont
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2.0
11 * of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 ****************************************************************************/
34 #include <vlc_common.h>
35 #include <vlc_plugin.h>
37 #include <vlc_window.h>
41 #define DISPLAY_TEXT N_("X11 display")
42 #define DISPLAY_LONGTEXT N_( \
43 "X11 hardware display to use. By default VLC will " \
44 "use the value of the DISPLAY environment variable.")
46 #define SHM_TEXT N_("Use shared memory")
47 #define SHM_LONGTEXT N_( \
48 "Use shared memory to communicate between VLC and the X server.")
50 static int Open (vlc_object_t *);
51 static void Close (vlc_object_t *);
57 set_shortname (N_("XVideo"))
58 set_description (N_("(Experimental) XVideo output"))
59 set_category (CAT_VIDEO)
60 set_subcategory (SUBCAT_VIDEO_VOUT)
61 set_capability ("video output", 0)
62 set_callbacks (Open, Close)
64 add_string ("x11-display", NULL, NULL,
65 DISPLAY_TEXT, DISPLAY_LONGTEXT, true)
66 add_bool ("x11-shm", true, NULL, SHM_TEXT, SHM_LONGTEXT, true)
67 add_shortcut ("xcb-xv")
72 xcb_connection_t *conn;
73 xcb_xv_query_adaptors_reply_t *adaptors;
74 vout_window_t *embed;/* VLC window */
76 xcb_window_t window; /* drawable X window */
77 xcb_gcontext_t gc; /* context to put images */
78 xcb_xv_port_t port; /* XVideo port */
79 uint32_t id; /* XVideo format */
80 uint16_t width; /* display width */
81 uint16_t height; /* display height */
82 bool shm; /* whether to use MIT-SHM */
85 static int Init (vout_thread_t *);
86 static void Deinit (vout_thread_t *);
87 static void Display (vout_thread_t *, picture_t *);
88 static int Manage (vout_thread_t *);
90 int CheckError (vout_thread_t *vout, const char *str, xcb_void_cookie_t ck)
92 xcb_generic_error_t *err;
94 err = xcb_request_check (vout->p_sys->conn, ck);
97 msg_Err (vout, "%s: X11 error %d", str, err->error_code);
104 * Check that the X server supports the XVideo extension.
106 static bool CheckXVideo (vout_thread_t *vout, xcb_connection_t *conn)
108 xcb_xv_query_extension_reply_t *r;
109 xcb_xv_query_extension_cookie_t ck = xcb_xv_query_extension (conn);
112 r = xcb_xv_query_extension_reply (conn, ck, NULL);
114 { /* We need XVideo 2.2 for PutImage */
115 if ((r->major > 2) || (r->major == 2 && r->minor >= 2))
117 msg_Dbg (vout, "using XVideo extension v%"PRIu8".%"PRIu8,
122 msg_Dbg (vout, "XVideo extension too old (v%"PRIu8".%"PRIu8,
127 msg_Dbg (vout, "XVideo extension not available");
132 * Get a list of XVideo adaptors for a given window.
134 static xcb_xv_query_adaptors_reply_t *GetAdaptors (vout_window_t *wnd,
135 xcb_connection_t *conn)
137 xcb_xv_query_adaptors_cookie_t ck;
139 ck = xcb_xv_query_adaptors (conn, wnd->handle.xid);
140 return xcb_xv_query_adaptors_reply (conn, ck, NULL);
146 * Probe the X server.
148 static int Open (vlc_object_t *obj)
150 vout_thread_t *vout = (vout_thread_t *)obj;
151 vout_sys_t *p_sys = malloc (sizeof (*p_sys));
158 p_sys->conn = Connect (obj);
159 if (p_sys->conn == NULL)
162 if (!CheckXVideo (vout, p_sys->conn))
164 msg_Warn (vout, "Please enable XVideo 2.2 for faster video display");
165 xcb_disconnect (p_sys->conn);
169 const xcb_screen_t *screen;
170 p_sys->embed = GetWindow (vout, p_sys->conn, &screen, &p_sys->shm);
171 if (p_sys->embed == NULL)
173 xcb_disconnect (p_sys->conn);
177 /* Cache adaptors infos */
178 p_sys->adaptors = GetAdaptors (p_sys->embed, p_sys->conn);
179 if (p_sys->adaptors == NULL)
184 const uint32_t mask =
185 /* XCB_CW_EVENT_MASK */
186 XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
187 XCB_EVENT_MASK_POINTER_MOTION;
189 xcb_window_t window = xcb_generate_id (p_sys->conn);
191 c = xcb_create_window_checked (p_sys->conn, screen->root_depth, window,
192 p_sys->embed->handle.xid, 0, 0, 1, 1, 0,
193 XCB_WINDOW_CLASS_INPUT_OUTPUT,
195 XCB_CW_EVENT_MASK, &mask);
196 if (CheckError (vout, "cannot create X11 window", c))
198 p_sys->window = window;
199 msg_Dbg (vout, "using X11 window %08"PRIx32, p_sys->window);
200 xcb_map_window (p_sys->conn, window);
203 p_sys->gc = xcb_generate_id (p_sys->conn);
204 xcb_create_gc (p_sys->conn, p_sys->gc, p_sys->window, 0, NULL);
205 msg_Dbg (vout, "using X11 graphic context %08"PRIx32, p_sys->gc);
207 vout->pf_init = Init;
208 vout->pf_end = Deinit;
209 vout->pf_display = Display;
210 vout->pf_manage = Manage;
220 * Disconnect from the X server.
222 static void Close (vlc_object_t *obj)
224 vout_thread_t *vout = (vout_thread_t *)obj;
225 vout_sys_t *p_sys = vout->p_sys;
227 free (p_sys->adaptors);
228 vout_ReleaseWindow (p_sys->embed);
229 xcb_disconnect (p_sys->conn);
233 static vlc_fourcc_t ParseFormat (vout_thread_t *vout,
234 const xcb_xv_image_format_info_t *restrict f)
236 if (f->byte_order != ORDER && f->bpp != 8)
237 return 0; /* Argh! */
241 case XCB_XV_IMAGE_FORMAT_INFO_TYPE_RGB:
242 switch (f->num_planes)
249 return VLC_FOURCC ('R', 'V', '3', '2');
253 return VLC_FOURCC ('R', 'V', '2', '4');
257 return VLC_FOURCC ('R', 'V', '1', '6');
259 return VLC_FOURCC ('R', 'V', '1', '5');
263 return VLC_FOURCC ('R', 'G', 'B', '2');
268 msg_Err (vout, "unknown XVideo RGB format %"PRIx32" (%.4s)",
270 msg_Dbg (vout, " %"PRIu8" planes, %"PRIu8" bits/pixel, "
271 "depth %"PRIu8, f->num_planes, f->bpp, f->depth);
274 case XCB_XV_IMAGE_FORMAT_INFO_TYPE_YUV:
275 if (f->u_sample_bits != f->v_sample_bits
276 || f->vhorz_u_period != f->vhorz_v_period
277 || f->vvert_u_period != f->vvert_v_period
278 || f->y_sample_bits != 8 || f->u_sample_bits != 8
279 || f->vhorz_y_period != 1 || f->vvert_y_period != 1)
281 switch (f->num_planes)
287 if (f->vhorz_u_period == 1 && f->vvert_u_period == 1)
288 return VLC_FOURCC ('I', '4', '4', '4');
291 if (f->vhorz_u_period == 2 && f->vvert_u_period == 1)
293 if (!strcmp ((const char *)f->vcomp_order, "YUYV"))
294 return VLC_FOURCC ('Y', 'U', 'Y', '2');
295 if (!strcmp ((const char *)f->vcomp_order, "UYVY"))
296 return VLC_FOURCC ('U', 'Y', 'V', 'Y');
305 if (f->vhorz_u_period == 2 && f->vvert_u_period == 2)
307 if (!strcmp ((const char *)f->vcomp_order, "YVU"))
308 return VLC_FOURCC ('Y', 'V', '1', '2');
309 if (!strcmp ((const char *)f->vcomp_order, "YUV"))
310 return VLC_FOURCC ('I', '4', '2', '0');
316 msg_Err (vout, "unknown XVideo YUV format %"PRIx32" (%.4s)", f->id,
318 msg_Dbg (vout, " %"PRIu8" planes, %"PRIu32" bits/pixel, "
319 "%"PRIu32"/%"PRIu32"/%"PRIu32" bits/sample", f->num_planes,
320 f->bpp, f->y_sample_bits, f->u_sample_bits, f->v_sample_bits);
321 msg_Dbg (vout, " period: %"PRIu32"/%"PRIu32"/%"PRIu32"x"
322 "%"PRIu32"/%"PRIu32"/%"PRIu32,
323 f->vhorz_y_period, f->vhorz_u_period, f->vhorz_v_period,
324 f->vvert_y_period, f->vvert_u_period, f->vvert_v_period);
325 msg_Warn (vout, " order: %.32s", f->vcomp_order);
332 static const xcb_xv_image_format_info_t *
333 FindFormat (vout_thread_t *vout, vlc_fourcc_t chroma, xcb_xv_port_t port,
334 const xcb_xv_list_image_formats_reply_t *list,
335 xcb_xv_query_image_attributes_reply_t **restrict pa)
337 xcb_connection_t *conn = vout->p_sys->conn;
338 const xcb_xv_image_format_info_t *f, *end;
340 f = xcb_xv_list_image_formats_format (list);
341 end = f + xcb_xv_list_image_formats_format_length (list);
344 if (chroma != ParseFormat (vout, f))
347 xcb_xv_query_image_attributes_reply_t *i;
348 i = xcb_xv_query_image_attributes_reply (conn,
349 xcb_xv_query_image_attributes (conn, port, f->id,
350 vout->fmt_in.i_width, vout->fmt_in.i_height), NULL);
354 if (i->width != vout->fmt_in.i_width
355 || i->height != vout->fmt_in.i_height)
357 msg_Warn (vout, "incompatible size %ux%u -> %"PRIu32"x%"PRIu32,
358 vout->fmt_in.i_width, vout->fmt_in.i_height,
359 i->width, i->height);
370 * Allocate drawable window and picture buffers.
372 static int Init (vout_thread_t *vout)
374 vout_sys_t *p_sys = vout->p_sys;
375 xcb_xv_query_image_attributes_reply_t *att = NULL;
376 bool swap_planes = false; /* whether X wants V before U */
378 /* FIXME: check max image size */
379 xcb_xv_adaptor_info_iterator_t it;
380 for (it = xcb_xv_query_adaptors_info_iterator (p_sys->adaptors);
382 xcb_xv_adaptor_info_next (&it))
384 const xcb_xv_adaptor_info_t *a = it.data;
386 /* FIXME: Open() should fail if none of the ports are usable to VLC */
387 if (!(a->type & XCB_XV_TYPE_IMAGE_MASK))
390 xcb_xv_list_image_formats_reply_t *r;
391 r = xcb_xv_list_image_formats_reply (p_sys->conn,
392 xcb_xv_list_image_formats (p_sys->conn, a->base_id), NULL);
396 const xcb_xv_image_format_info_t *fmt;
398 /* Video chroma in preference order */
399 const vlc_fourcc_t chromas[] = {
400 vout->fmt_in.i_chroma,
401 VLC_FOURCC ('Y', 'U', 'Y', '2'),
402 VLC_FOURCC ('R', 'V', '2', '4'),
403 VLC_FOURCC ('R', 'V', '1', '5'),
405 for (size_t i = 0; i < sizeof (chromas) / sizeof (chromas[0]); i++)
407 vlc_fourcc_t chroma = chromas[i];
408 fmt = FindFormat (vout, chroma, a->base_id, r, &att);
411 vout->output.i_chroma = chroma;
419 /* TODO: grab port */
420 p_sys->port = a->base_id;
421 msg_Dbg (vout, "using port %"PRIu32, p_sys->port);
424 msg_Dbg (vout, "using image format 0x%"PRIx32, p_sys->id);
425 if (fmt->type == XCB_XV_IMAGE_FORMAT_INFO_TYPE_RGB)
427 vout->fmt_out.i_rmask = vout->output.i_rmask = fmt->red_mask;
428 vout->fmt_out.i_gmask = vout->output.i_gmask = fmt->green_mask;
429 vout->fmt_out.i_bmask = vout->output.i_bmask = fmt->blue_mask;
432 if (fmt->num_planes == 3)
433 swap_planes = !strcmp ((const char *)fmt->vcomp_order, "YVU");
437 msg_Err (vout, "no available XVideo adaptor");
438 return VLC_EGENERIC; /* no usable adaptor */
440 /* Allocate picture buffers */
441 const uint32_t *offsets;
443 offsets = xcb_xv_query_image_attributes_offsets (att);
445 I_OUTPUTPICTURES = 0;
446 for (size_t index = 0; I_OUTPUTPICTURES < 2; index++)
448 picture_t *pic = vout->p_picture + index;
450 if (index > sizeof (vout->p_picture) / sizeof (pic))
452 if (pic->i_status != FREE_PICTURE)
455 vout_InitPicture (vout, pic, vout->output.i_chroma,
456 att->width, att->height,
457 vout->fmt_in.i_aspect);
458 if (PictureAlloc (vout, pic, att->data_size,
459 p_sys->shm ? p_sys->conn : NULL))
461 /* Allocate further planes as specified by XVideo */
462 /* We assume that offsets[0] is zero */
463 for (int i = 1; i < pic->i_planes; i++)
465 pic->p->p_pixels + offsets[swap_planes ? (3 - i) : i];
466 PP_OUTPUTPICTURE[I_OUTPUTPICTURES++] = pic;
470 unsigned x, y, width, height;
472 if (GetWindowSize (p_sys->embed, p_sys->conn, &width, &height))
474 vout_PlacePicture (vout, width, height, &x, &y, &width, &height);
476 const uint32_t values[] = { x, y, width, height, };
477 xcb_configure_window (p_sys->conn, p_sys->window,
478 XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
479 XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
481 xcb_flush (p_sys->conn);
482 p_sys->height = height;
483 p_sys->width = width;
485 vout->fmt_out.i_chroma = vout->output.i_chroma;
486 vout->fmt_out.i_visible_width = vout->fmt_in.i_visible_width;
487 vout->fmt_out.i_visible_height = vout->fmt_in.i_visible_height;
488 vout->fmt_out.i_sar_num = vout->fmt_out.i_sar_den = 1;
490 vout->output.i_width = vout->fmt_out.i_width = vout->fmt_in.i_width;
491 vout->output.i_height = vout->fmt_out.i_height = vout->fmt_in.i_height;
492 vout->fmt_out.i_x_offset = vout->fmt_in.i_x_offset;
493 p_vout->fmt_out.i_y_offset = vout->fmt_in.i_y_offset;
496 vout->output.i_aspect = vout->fmt_out.i_aspect =
497 width * VOUT_ASPECT_FACTOR / height;
503 * Free picture buffers.
505 static void Deinit (vout_thread_t *vout)
507 vout_sys_t *p_sys = vout->p_sys;
509 for (int i = 0; i < I_OUTPUTPICTURES; i++)
510 PictureFree (PP_OUTPUTPICTURE[i], p_sys->conn);
514 * Sends an image to the X server.
516 static void Display (vout_thread_t *vout, picture_t *pic)
518 vout_sys_t *p_sys = vout->p_sys;
519 xcb_shm_seg_t segment = (uintptr_t)pic->p_sys;
522 xcb_xv_shm_put_image (p_sys->conn, p_sys->port, p_sys->window,
523 p_sys->gc, segment, p_sys->id, 0,
525 pic->p->i_visible_pitch / pic->p->i_pixel_pitch,
526 pic->p->i_visible_lines,
527 /* Dst: */ 0, 0, p_sys->width, p_sys->height,
529 pic->p->i_pitch / pic->p->i_pixel_pitch,
530 pic->p->i_lines, false);
532 xcb_xv_put_image (p_sys->conn, p_sys->port, p_sys->window,
533 p_sys->gc, p_sys->id,
535 pic->p->i_visible_pitch / pic->p->i_pixel_pitch,
536 pic->p->i_visible_lines,
537 0, 0, p_sys->width, p_sys->height,
538 pic->p->i_pitch / pic->p->i_pixel_pitch,
540 pic->p->i_pitch * pic->p->i_lines, pic->p->p_pixels);
541 xcb_flush (p_sys->conn);
545 * Process incoming X events.
547 static int Manage (vout_thread_t *vout)
549 vout_sys_t *p_sys = vout->p_sys;
550 xcb_generic_event_t *ev;
552 while ((ev = xcb_poll_for_event (p_sys->conn)) != NULL)
553 ProcessEvent (vout, p_sys->conn, p_sys->window, ev);
555 if (xcb_connection_has_error (p_sys->conn))
557 msg_Err (vout, "X server failure");
564 HandleParentStructure (vout_thread_t *vout, xcb_connection_t *conn,
565 xcb_window_t xid, xcb_configure_notify_event_t *ev)
567 unsigned width, height, x, y;
569 vout_PlacePicture (vout, ev->width, ev->height, &x, &y, &width, &height);
571 /* Move the picture within the window */
572 const uint32_t values[] = { x, y, width, height, };
573 xcb_configure_window (conn, xid,
574 XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y
575 | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
577 vout->p_sys->width = width;
578 vout->p_sys->height = height;