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 it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * 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 * Information from a vout_display_t to configure
117 * the core behaviour.
119 * By default they are all false or NULL.
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 bool has_event_thread; /* Will events (key at least) be emitted using an independent thread */
128 const vlc_fourcc_t *subpicture_chromas; /* List of supported chromas for subpicture rendering. */
129 } vout_display_info_t;
132 * Control query for vout_display_t
135 /* Hide the mouse. It will be sent when
136 * vout_display_t::info.b_hide_mouse is false */
137 VOUT_DISPLAY_HIDE_MOUSE,
139 /* Ask to reset the internal buffers after a VOUT_DISPLAY_EVENT_PICTURES_INVALID
142 VOUT_DISPLAY_RESET_PICTURES,
144 /* Ask the module to acknowledge/refuse the fullscreen state change after
145 * being requested (externally or by VOUT_DISPLAY_EVENT_FULLSCREEN */
146 VOUT_DISPLAY_CHANGE_FULLSCREEN, /* bool fs */
148 /* Ask the module to acknowledge/refuse the window management state change
149 * after being requested externally or by VOUT_DISPLAY_WINDOW_STATE */
150 VOUT_DISPLAY_CHANGE_WINDOW_STATE, /* unsigned state */
152 /* Ask the module to acknowledge/refuse the display size change requested
153 * (externally or by VOUT_DISPLAY_EVENT_DISPLAY_SIZE) */
154 VOUT_DISPLAY_CHANGE_DISPLAY_SIZE, /* const vout_display_cfg_t *p_cfg */
156 /* Ask the module to acknowledge/refuse fill display state change after
157 * being requested externally */
158 VOUT_DISPLAY_CHANGE_DISPLAY_FILLED, /* const vout_display_cfg_t *p_cfg */
160 /* Ask the module to acknowledge/refuse zoom change after being requested
162 VOUT_DISPLAY_CHANGE_ZOOM, /* const vout_display_cfg_t *p_cfg */
164 /* Ask the module to acknowledge/refuse source aspect ratio after being
165 * requested externally */
166 VOUT_DISPLAY_CHANGE_SOURCE_ASPECT, /* const video_format_t *p_source */
168 /* Ask the module to acknowledge/refuse source crop change after being
169 * requested externally.
170 * The cropping requested is stored by video_format_t::i_x/y_offset and
171 * video_format_t::i_visible_width/height */
172 VOUT_DISPLAY_CHANGE_SOURCE_CROP, /* const video_format_t *p_source */
176 * Event from vout_display_t
178 * Events modifiying the state may be sent multiple times.
179 * Only the transition will be retained and acted upon.
183 * ZOOM ? DISPLAY_FILLED ? ON_TOP ?
186 VOUT_DISPLAY_EVENT_PICTURES_INVALID, /* The buffer are now invalid and need to be changed */
188 VOUT_DISPLAY_EVENT_FULLSCREEN,
189 #if defined(_WIN32) || defined(__OS2__)
190 VOUT_DISPLAY_EVENT_WINDOW_STATE,
193 VOUT_DISPLAY_EVENT_DISPLAY_SIZE, /* The display size need to change : int i_width, int i_height */
196 VOUT_DISPLAY_EVENT_CLOSE,
197 VOUT_DISPLAY_EVENT_KEY,
200 * You can use it OR use the other mouse events. The core will do
203 VOUT_DISPLAY_EVENT_MOUSE_STATE,
206 VOUT_DISPLAY_EVENT_MOUSE_MOVED,
207 VOUT_DISPLAY_EVENT_MOUSE_PRESSED,
208 VOUT_DISPLAY_EVENT_MOUSE_RELEASED,
209 VOUT_DISPLAY_EVENT_MOUSE_DOUBLE_CLICK,
213 * Vout owner structures
215 struct vout_display_owner_t {
216 /* Private place holder for the vout_display_t creator
218 vout_display_owner_sys_t *sys;
220 /* Event coming from the module
222 * This function is set prior to the module instantiation and must not
223 * be overwritten nor used directly (use the vout_display_SendEvent*
226 * You can send it at any time i.e. from any vout_display_t functions or
227 * from another thread.
228 * Be careful, it does not ensure correct serialization if it is used
229 * from multiple threads.
231 void (*event)(vout_display_t *, int, va_list);
235 * These functions are set prior to the module instantiation and must not
236 * be overwritten nor used directly (use the vout_display_*Window
238 vout_window_t *(*window_new)(vout_display_t *, unsigned type);
239 void (*window_del)(vout_display_t *, vout_window_t *);
242 struct vout_display_t {
248 /* Initial and current configuration.
249 * You cannot modify it directly, you must use the appropriate events.
251 * It reflects the current values, i.e. after the event has been accepted
252 * and applied/configured if needed.
254 const vout_display_cfg_t *cfg;
256 /* video source format.
258 * Cropping is not requested while in the open function.
259 * You cannot change it.
261 video_format_t source;
265 * You can only change it inside the module open function to
266 * match what you want, and when a VOUT_DISPLAY_RESET_PICTURES control
267 * request is made and succeeds.
269 * By default, it is equal to ::source except for the aspect ratio
270 * which is undefined(0) and is ignored.
276 * You can only set them in the open function.
278 vout_display_info_t info;
280 /* Return a pointer over the current picture_pool_t* (mandatory).
282 * For performance reasons, it is best to provide at least count
283 * pictures but it is not mandatory.
284 * You can return NULL when you cannot/do not want to allocate
286 * The vout display module keeps the ownership of the pool and can
287 * destroy it only when closing or on invalid pictures control.
289 picture_pool_t *(*pool)(vout_display_t *, unsigned count);
291 /* Prepare a picture and an optional subpicture for display (optional).
293 * It is called before the next pf_display call to provide as much
294 * time as possible to prepare the given picture and the subpicture
296 * You are guaranted that pf_display will always be called and using
297 * the exact same picture_t and subpicture_t.
298 * You cannot change the pixel content of the picture_t or of the
301 void (*prepare)(vout_display_t *, picture_t *, subpicture_t *);
303 /* Display a picture and an optional subpicture (mandatory).
305 * The picture and the optional subpicture must be displayed as soon as
307 * You cannot change the pixel content of the picture_t or of the
310 * This function gives away the ownership of the picture and of the
311 * subpicture, so you must release them as soon as possible.
313 void (*display)(vout_display_t *, picture_t *, subpicture_t *);
315 /* Control on the module (mandatory) */
316 int (*control)(vout_display_t *, int, va_list);
318 /* Manage pending event (optional) */
319 void (*manage)(vout_display_t *);
321 /* Private place holder for the vout_display_t module (optional)
323 * A module is free to use it as it wishes.
325 vout_display_sys_t *sys;
327 /* Reserved for the vout_display_t owner.
329 * It must not be overwritten nor used directly by a module.
331 vout_display_owner_t owner;
334 static inline void vout_display_SendEvent(vout_display_t *vd, int query, ...)
337 va_start(args, query);
338 vd->owner.event(vd, query, args);
342 static inline void vout_display_SendEventDisplaySize(vout_display_t *vd, int width, int height)
344 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_DISPLAY_SIZE, width, height);
346 static inline void vout_display_SendEventPicturesInvalid(vout_display_t *vd)
348 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_PICTURES_INVALID);
350 static inline void vout_display_SendEventClose(vout_display_t *vd)
352 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_CLOSE);
354 static inline void vout_display_SendEventKey(vout_display_t *vd, int key)
356 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_KEY, key);
358 static inline void vout_display_SendEventFullscreen(vout_display_t *vd, bool is_fullscreen)
360 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_FULLSCREEN, is_fullscreen);
363 static inline void vout_display_SendWindowState(vout_display_t *vd, unsigned state)
365 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_WINDOW_STATE, state);
368 /* The mouse position (State and Moved event) must be expressed against vout_display_t::source unit */
369 static inline void vout_display_SendEventMouseState(vout_display_t *vd, int x, int y, int button_mask)
371 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_STATE, x, y, button_mask);
373 static inline void vout_display_SendEventMouseMoved(vout_display_t *vd, int x, int y)
375 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_MOVED, x, y);
377 static inline void vout_display_SendEventMousePressed(vout_display_t *vd, int button)
379 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_PRESSED, button);
381 static inline void vout_display_SendEventMouseReleased(vout_display_t *vd, int button)
383 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_RELEASED, button);
385 static inline void vout_display_SendEventMouseDoubleClick(vout_display_t *vd)
387 vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_DOUBLE_CLICK);
391 * Asks for a new window of a given type.
393 static inline vout_window_t *vout_display_NewWindow(vout_display_t *vd, unsigned type)
395 return vd->owner.window_new(vd, type);
398 * Deletes a window created by vout_display_NewWindow if window is non NULL
399 * or any unused windows otherwise.
401 static inline void vout_display_DeleteWindow(vout_display_t *vd,
402 vout_window_t *window)
404 vd->owner.window_del(vd, window);
407 static inline bool vout_display_IsWindowed(vout_display_t *vd)
409 vout_window_t *window = vout_display_NewWindow(vd, VOUT_WINDOW_TYPE_INVALID);
411 vout_display_DeleteWindow(vd, window);
412 return window != NULL;
416 * Computes the default display size given the source and
417 * the display configuration.
419 * This asssumes that the picture is already cropped.
421 VLC_API void vout_display_GetDefaultDisplaySize(unsigned *width, unsigned *height, const video_format_t *source, const vout_display_cfg_t *);
425 * Structure used to store the result of a vout_display_PlacePicture.
432 } vout_display_place_t;
435 * Computes how to place a picture inside the display to respect
436 * the given parameters.
437 * This assumes that cropping is done by an external mean.
439 * \param p_place Place inside the window (window pixel unit)
440 * \param p_source Video source format
441 * \param p_cfg Display configuration
442 * \param b_clip If true, prevent the video to go outside the display (break zoom).
444 VLC_API void vout_display_PlacePicture(vout_display_place_t *place, const video_format_t *source, const vout_display_cfg_t *cfg, bool do_clipping);
448 * Helper function that applies the necessary transforms to the mouse position
449 * and then calls vout_display_SendEventMouseMoved.
451 * \param vd vout_display_t.
452 * \param orient_display The orientation of the picture as seen on screen (probably ORIENT_NORMAL).
453 * \param m_x Mouse x position (relative to place, origin is top left).
454 * \param m_y Mouse y position (relative to place, origin is top left).
455 * \param place Place of the picture.
457 VLC_API void vout_display_SendMouseMovedDisplayCoordinates(vout_display_t *vd, video_orientation_t orient_display, int m_x, int m_y,
458 vout_display_place_t *place);
459 #endif /* VLC_VOUT_DISPLAY_H */