1 /*****************************************************************************
2 * vlc_vout_display.h: vout_display_t definitions
3 *****************************************************************************
4 * Copyright (C) 2009 Laurent Aimar
7 * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 #ifndef VLC_VOUT_DISPLAY_H
25 #define VLC_VOUT_DISPLAY_H 1
29 * This file defines vout display structures and functions in vlc
33 #include <vlc_picture.h>
34 #include <vlc_picture_pool.h>
35 #include <vlc_subpicture.h>
37 #include <vlc_mouse.h>
38 #include <vlc_vout_window.h>
41 * Do NOT use video_format_t::i_aspect but i_sar_num/den everywhere. i_aspect
42 * will be removed as soon as possible.
45 typedef struct vout_display_t vout_display_t;
46 typedef struct vout_display_sys_t vout_display_sys_t;
47 typedef struct vout_display_owner_t vout_display_owner_t;
48 typedef struct vout_display_owner_sys_t vout_display_owner_sys_t;
51 * Possible alignments for vout_display.
55 VOUT_DISPLAY_ALIGN_CENTER,
57 VOUT_DISPLAY_ALIGN_LEFT,
58 VOUT_DISPLAY_ALIGN_RIGHT,
60 VOUT_DISPLAY_ALIGN_TOP,
61 VOUT_DISPLAY_ALIGN_BOTTOM,
62 } vout_display_align_t;
65 * Window management state.
68 VOUT_WINDOW_STATE_NORMAL=0,
69 VOUT_WINDOW_STATE_ABOVE=1,
70 VOUT_WINDOW_STATE_BELOW=2,
71 VOUT_WINDOW_STACK_MASK=3,
75 * Initial/Current configuration for a vout_display_t
78 bool is_fullscreen; /* Is the display fullscreen */
80 /* Display properties */
82 /* Window title (may be NULL) */
96 /* Alignment of the picture inside the display */
102 /* Do we fill up the display with the video */
103 bool is_display_filled;
106 * It will be applied to the whole display if b_display_filled is set, otherwise
107 * only on the video source */
113 } vout_display_cfg_t;
116 * Informations from a vout_display_t to configure
117 * the core behaviour.
119 * By default they are all false.
123 bool is_slow; /* The picture memory has slow read/write */
124 bool has_double_click; /* Is double-click generated */
125 bool has_hide_mouse; /* Is mouse automatically hidden */
126 bool has_pictures_invalid;/* Will VOUT_DISPLAY_EVENT_PICTURES_INVALID be used */
127 } vout_display_info_t;
130 * Control query for vout_display_t
133 /* Hide the mouse. It will be sent when
134 * vout_display_t::info.b_hide_mouse is false */
135 VOUT_DISPLAY_HIDE_MOUSE,
137 /* Ask to reset the internal buffers after a VOUT_DISPLAY_EVENT_PICTURES_INVALID
140 VOUT_DISPLAY_RESET_PICTURES,
142 /* Ask the module to acknowledge/refuse the fullscreen state change after
143 * being requested (externally or by VOUT_DISPLAY_EVENT_FULLSCREEN */
144 VOUT_DISPLAY_CHANGE_FULLSCREEN, /* const vout_display_cfg_t *p_cfg */
146 /* Ask the module to acknowledge/refuse the window management state change
147 * after being requested externally or by VOUT_DISPLAY_WINDOW_STATE */
148 VOUT_DISPLAY_CHANGE_WINDOW_STATE, /* unsigned state */
150 /* Ask the module to acknowledge/refuse the display size change requested
151 * (externally or by VOUT_DISPLAY_EVENT_DISPLAY_SIZE) */
152 VOUT_DISPLAY_CHANGE_DISPLAY_SIZE, /* const vout_display_cfg_t *p_cfg, int is_forced */
154 /* Ask the module to acknowledge/refuse fill display state change after
155 * being requested externally */
156 VOUT_DISPLAY_CHANGE_DISPLAY_FILLED, /* const vout_display_cfg_t *p_cfg */
158 /* Ask the module to acknowledge/refuse zoom change after being requested
160 VOUT_DISPLAY_CHANGE_ZOOM, /* const vout_display_cfg_t *p_cfg */
162 /* Ask the module to acknowledge/refuse source aspect ratio after being
163 * requested externally */
164 VOUT_DISPLAY_CHANGE_SOURCE_ASPECT, /* const video_format_t *p_source */
166 /* Ask the module to acknowledge/refuse source crop change after being
167 * requested externally.
168 * The cropping requested is stored by video_format_t::i_x/y_offset and
169 * video_format_t::i_visible_width/height */
170 VOUT_DISPLAY_CHANGE_SOURCE_CROP, /* const video_format_t *p_source */
172 /* Ask an opengl interface if available. */
173 VOUT_DISPLAY_GET_OPENGL, /* vout_opengl_t ** */
177 * Event from vout_display_t
179 * Events modifiying the state may be sent multiple times.
180 * Only the transition will be retained and acted upon.
184 * ZOOM ? DISPLAY_FILLED ? ON_TOP ?
187 VOUT_DISPLAY_EVENT_PICTURES_INVALID, /* The buffer are now invalid and need to be changed */
189 VOUT_DISPLAY_EVENT_FULLSCREEN,
190 VOUT_DISPLAY_EVENT_WINDOW_STATE,
192 VOUT_DISPLAY_EVENT_DISPLAY_SIZE, /* The display size need to change : int i_width, int i_height, bool is_fullscreen */
195 VOUT_DISPLAY_EVENT_CLOSE,
196 VOUT_DISPLAY_EVENT_KEY,
199 * You can use it OR use the other mouse events. The core will do
202 VOUT_DISPLAY_EVENT_MOUSE_STATE,
205 VOUT_DISPLAY_EVENT_MOUSE_MOVED,
206 VOUT_DISPLAY_EVENT_MOUSE_PRESSED,
207 VOUT_DISPLAY_EVENT_MOUSE_RELEASED,
208 VOUT_DISPLAY_EVENT_MOUSE_DOUBLE_CLICK,
212 * Vout owner structures
214 struct vout_display_owner_t {
215 /* Private place holder for the vout_display_t creator
217 vout_display_owner_sys_t *sys;
219 /* Event coming from the module
221 * This function is set prior to the module instantiation and must not
222 * be overwritten nor used directly (use the vout_display_SendEvent*
225 * You can send it at any time i.e. from any vout_display_t functions or
226 * from another thread.
227 * Becarefull, it does not ensure correct serialization if it is used
228 * from multiple threads.
230 void (*event)(vout_display_t *, int, va_list);
234 * These functions are set prior to the module instantiation and must not
235 * be overwritten nor used directly (use the vout_display_*Window
237 vout_window_t *(*window_new)(vout_display_t *, const vout_window_cfg_t *);
238 void (*window_del)(vout_display_t *, vout_window_t *);
241 struct vout_display_t {
247 /* Initial and current configuration.
248 * You cannot modify it directly, you must use the appropriate events.
250 * It reflects the current values, i.e. after the event has been accepted
251 * and applied/configured if needed.
253 const vout_display_cfg_t *cfg;
255 /* video source format.
257 * Cropping is not requested while in the open function.
258 * You cannot change it.
260 video_format_t source;
264 * You can only change it inside the module open function to
265 * match what you want, and when a VOUT_DISPLAY_RESET_PICTURES control
266 * request is made and succeeds.
268 * By default, it is equal to ::source except for the aspect ratio
269 * which is undefined(0) and is ignored.
275 * You can only set them in the open function.
277 vout_display_info_t info;
279 /* Return a pointer over the current picture_pool_t* (mandatory).
281 * For performance reasons, it is best to provide at least count
282 * pictures but it is not mandatory.
283 * You can return NULL when you cannot/do not want to allocate
285 * The vout display module keeps the ownership of the pool and can
286 * destroy it only when closing or on invalid pictures control.
288 picture_pool_t *(*pool)(vout_display_t *, unsigned count);
290 /* Prepare a picture for display (optional).
292 * It is called before the next pf_display call to provide as much
293 * time as possible to prepare the given picture for display.
294 * You are guaranted that pf_display will always be called and using
295 * the exact same picture_t.
296 * You cannot change the pixel content of the picture_t.
298 void (*prepare)(vout_display_t *, picture_t *);
300 /* Display a picture (mandatory).
302 * The picture must be displayed as soon as possible.
303 * You cannot change the pixel content of the picture_t.
305 * This function gives away the ownership of the picture, so you must
306 * release it as soon as possible.
308 void (*display)(vout_display_t *, picture_t *);
310 /* Control on the module (mandatory) */
311 int (*control)(vout_display_t *, int, va_list);
313 /* Manage pending event (optional) */
314 void (*manage)(vout_display_t *);
316 /* Private place holder for the vout_display_t module (optional)
318 * A module is free to use it as it wishes.
320 vout_display_sys_t *sys;
322 /* Reserved for the vout_display_t owner.
324 * It must not be overwritten nor used directly by a module.
326 vout_display_owner_t owner;
329 static inline void vout_display_SendEvent(vout_display_t *vd, int query, ...)
332 va_start(args, query);
333 vd->owner.event(vd, query, args);
337 static inline void vout_display_SendEventDisplaySize(vout_display_t *vd, int width, int height, bool is_fullscreen)
339 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_DISPLAY_SIZE, width, height, is_fullscreen);
341 static inline void vout_display_SendEventPicturesInvalid(vout_display_t *vd)
343 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_PICTURES_INVALID);
345 static inline void vout_display_SendEventClose(vout_display_t *vd)
347 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_CLOSE);
349 static inline void vout_display_SendEventKey(vout_display_t *vd, int key)
351 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_KEY, key);
353 static inline void vout_display_SendEventFullscreen(vout_display_t *vd, bool is_fullscreen)
355 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_FULLSCREEN, is_fullscreen);
357 static inline void vout_display_SendWindowState(vout_display_t *vd, unsigned state)
359 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_WINDOW_STATE, state);
361 /* The mouse position (State and Moved event) must be expressed against vout_display_t::source unit */
362 static inline void vout_display_SendEventMouseState(vout_display_t *vd, int x, int y, int button_mask)
364 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_STATE, x, y, button_mask);
366 static inline void vout_display_SendEventMouseMoved(vout_display_t *vd, int x, int y)
368 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_MOVED, x, y);
370 static inline void vout_display_SendEventMousePressed(vout_display_t *vd, int button)
372 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_PRESSED, button);
374 static inline void vout_display_SendEventMouseReleased(vout_display_t *vd, int button)
376 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_RELEASED, button);
378 static inline void vout_display_SendEventMouseDoubleClick(vout_display_t *vd)
380 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_DOUBLE_CLICK);
384 * Asks for a new window with the given configuration as hint.
386 * b_standalone/i_x/i_y may be overwritten by the core
388 static inline vout_window_t *vout_display_NewWindow(vout_display_t *vd, const vout_window_cfg_t *cfg)
390 return vd->owner.window_new(vd, cfg);
392 static inline void vout_display_DeleteWindow(vout_display_t *vd,
393 vout_window_t *window)
395 vd->owner.window_del(vd, window);
399 * Computes the default display size given the source and
400 * the display configuration.
402 * This asssumes that the picture is already cropped.
404 VLC_EXPORT( void, vout_display_GetDefaultDisplaySize, (unsigned *width, unsigned *height, const video_format_t *source, const vout_display_cfg_t *) );
408 * Structure used to store the result of a vout_display_PlacePicture.
415 } vout_display_place_t;
418 * Computes how to place a picture inside the display to respect
419 * the given parameters.
420 * This assumes that cropping is done by an external mean.
422 * \param p_place Place inside the window (window pixel unit)
423 * \param p_source Video source format
424 * \param p_cfg Display configuration
425 * \param b_clip If true, prevent the video to go outside the display (break zoom).
427 VLC_EXPORT( void, vout_display_PlacePicture, (vout_display_place_t *place, const video_format_t *source, const vout_display_cfg_t *cfg, bool do_clipping) );
429 #endif /* VLC_VOUT_DISPLAY_H */