home *** CD-ROM | disk | FTP | other *** search
- /*****************************************************************************
- * vlc_vout_display.h: vout_display_t definitions
- *****************************************************************************
- * Copyright (C) 2009 Laurent Aimar
- * $Id: 6f5b35f2eb94223fd3685df862e1fc49ee4ee088 $
- *
- * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
- *
- * This program 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 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
- #ifndef VLC_VOUT_DISPLAY_H
- #define VLC_VOUT_DISPLAY_H 1
-
- /**
- * \file
- * This file defines vout display structures and functions in vlc
- */
-
- #include <vlc_es.h>
- #include <vlc_picture.h>
- #include <vlc_picture_pool.h>
- #include <vlc_subpicture.h>
- #include <vlc_keys.h>
- #include <vlc_mouse.h>
- #include <vlc_vout_window.h>
-
- /* XXX
- * Do NOT use video_format_t::i_aspect but i_sar_num/den everywhere. i_aspect
- * will be removed as soon as possible.
- *
- */
- typedef struct vout_display_t vout_display_t;
- typedef struct vout_display_sys_t vout_display_sys_t;
- typedef struct vout_display_owner_t vout_display_owner_t;
- typedef struct vout_display_owner_sys_t vout_display_owner_sys_t;
-
- /**
- * Possible alignments for vout_display.
- */
- typedef enum
- {
- VOUT_DISPLAY_ALIGN_CENTER,
- /* */
- VOUT_DISPLAY_ALIGN_LEFT,
- VOUT_DISPLAY_ALIGN_RIGHT,
- /* */
- VOUT_DISPLAY_ALIGN_TOP,
- VOUT_DISPLAY_ALIGN_BOTTOM,
- } vout_display_align_t;
-
- /**
- * Window management state.
- */
- enum {
- VOUT_WINDOW_STATE_NORMAL=0,
- VOUT_WINDOW_STATE_ABOVE=1,
- VOUT_WINDOW_STATE_BELOW=2,
- VOUT_WINDOW_STACK_MASK=3,
- };
-
- /**
- * Initial/Current configuration for a vout_display_t
- */
- typedef struct {
- bool is_fullscreen; /* Is the display fullscreen */
-
- /* Display properties */
- struct {
- /* Window title (may be NULL) */
- const char *title;
-
- /* Display size */
- unsigned width;
- unsigned height;
-
- /* Display SAR */
- struct {
- unsigned num;
- unsigned den;
- } sar;
- } display;
-
- /* Alignment of the picture inside the display */
- struct {
- int horizontal;
- int vertical;
- } align;
-
- /* Do we fill up the display with the video */
- bool is_display_filled;
-
- /* Zoom to use
- * It will be applied to the whole display if b_display_filled is set, otherwise
- * only on the video source */
- struct {
- int num;
- int den;
- } zoom;
-
- } vout_display_cfg_t;
-
- /**
- * Informations from a vout_display_t to configure
- * the core behaviour.
- *
- * By default they are all false.
- *
- */
- typedef struct {
- bool is_slow; /* The picture memory has slow read/write */
- bool has_double_click; /* Is double-click generated */
- bool has_hide_mouse; /* Is mouse automatically hidden */
- bool has_pictures_invalid;/* Will VOUT_DISPLAY_EVENT_PICTURES_INVALID be used */
- } vout_display_info_t;
-
- /**
- * Control query for vout_display_t
- */
- enum {
- /* Hide the mouse. It will be sent when
- * vout_display_t::info.b_hide_mouse is false */
- VOUT_DISPLAY_HIDE_MOUSE,
-
- /* Ask to reset the internal buffers after a VOUT_DISPLAY_EVENT_PICTURES_INVALID
- * request.
- */
- VOUT_DISPLAY_RESET_PICTURES,
-
- /* Ask the module to acknowledge/refuse the fullscreen state change after
- * being requested (externally or by VOUT_DISPLAY_EVENT_FULLSCREEN */
- VOUT_DISPLAY_CHANGE_FULLSCREEN, /* const vout_display_cfg_t *p_cfg */
-
- /* Ask the module to acknowledge/refuse the window management state change
- * after being requested externally or by VOUT_DISPLAY_WINDOW_STATE */
- VOUT_DISPLAY_CHANGE_WINDOW_STATE, /* unsigned state */
-
- /* Ask the module to acknowledge/refuse the display size change requested
- * (externally or by VOUT_DISPLAY_EVENT_DISPLAY_SIZE) */
- VOUT_DISPLAY_CHANGE_DISPLAY_SIZE, /* const vout_display_cfg_t *p_cfg, int is_forced */
-
- /* Ask the module to acknowledge/refuse fill display state change after
- * being requested externally */
- VOUT_DISPLAY_CHANGE_DISPLAY_FILLED, /* const vout_display_cfg_t *p_cfg */
-
- /* Ask the module to acknowledge/refuse zoom change after being requested
- * externally */
- VOUT_DISPLAY_CHANGE_ZOOM, /* const vout_display_cfg_t *p_cfg */
-
- /* Ask the module to acknowledge/refuse source aspect ratio after being
- * requested externally */
- VOUT_DISPLAY_CHANGE_SOURCE_ASPECT, /* const video_format_t *p_source */
-
- /* Ask the module to acknowledge/refuse source crop change after being
- * requested externally.
- * The cropping requested is stored by video_format_t::i_x/y_offset and
- * video_format_t::i_visible_width/height */
- VOUT_DISPLAY_CHANGE_SOURCE_CROP, /* const video_format_t *p_source */
-
- /* Ask an opengl interface if available. */
- VOUT_DISPLAY_GET_OPENGL, /* vout_opengl_t ** */
- };
-
- /**
- * Event from vout_display_t
- *
- * Events modifiying the state may be sent multiple times.
- * Only the transition will be retained and acted upon.
- */
- enum {
- /* TODO:
- * ZOOM ? DISPLAY_FILLED ? ON_TOP ?
- */
- /* */
- VOUT_DISPLAY_EVENT_PICTURES_INVALID, /* The buffer are now invalid and need to be changed */
-
- VOUT_DISPLAY_EVENT_FULLSCREEN,
- VOUT_DISPLAY_EVENT_WINDOW_STATE,
-
- VOUT_DISPLAY_EVENT_DISPLAY_SIZE, /* The display size need to change : int i_width, int i_height, bool is_fullscreen */
-
- /* */
- VOUT_DISPLAY_EVENT_CLOSE,
- VOUT_DISPLAY_EVENT_KEY,
-
- /* Full mouse state.
- * You can use it OR use the other mouse events. The core will do
- * the conversion.
- */
- VOUT_DISPLAY_EVENT_MOUSE_STATE,
-
- /* Mouse event */
- VOUT_DISPLAY_EVENT_MOUSE_MOVED,
- VOUT_DISPLAY_EVENT_MOUSE_PRESSED,
- VOUT_DISPLAY_EVENT_MOUSE_RELEASED,
- VOUT_DISPLAY_EVENT_MOUSE_DOUBLE_CLICK,
- };
-
- /**
- * Vout owner structures
- */
- struct vout_display_owner_t {
- /* Private place holder for the vout_display_t creator
- */
- vout_display_owner_sys_t *sys;
-
- /* Event coming from the module
- *
- * This function is set prior to the module instantiation and must not
- * be overwritten nor used directly (use the vout_display_SendEvent*
- * wrapper.
- *
- * You can send it at any time i.e. from any vout_display_t functions or
- * from another thread.
- * Be careful, it does not ensure correct serialization if it is used
- * from multiple threads.
- */
- void (*event)(vout_display_t *, int, va_list);
-
- /* Window management
- *
- * These functions are set prior to the module instantiation and must not
- * be overwritten nor used directly (use the vout_display_*Window
- * wrapper */
- vout_window_t *(*window_new)(vout_display_t *, const vout_window_cfg_t *);
- void (*window_del)(vout_display_t *, vout_window_t *);
- };
-
- struct vout_display_t {
- VLC_COMMON_MEMBERS
-
- /* Module */
- module_t *module;
-
- /* Initial and current configuration.
- * You cannot modify it directly, you must use the appropriate events.
- *
- * It reflects the current values, i.e. after the event has been accepted
- * and applied/configured if needed.
- */
- const vout_display_cfg_t *cfg;
-
- /* video source format.
- *
- * Cropping is not requested while in the open function.
- * You cannot change it.
- */
- video_format_t source;
-
- /* picture_t format.
- *
- * You can only change it inside the module open function to
- * match what you want, and when a VOUT_DISPLAY_RESET_PICTURES control
- * request is made and succeeds.
- *
- * By default, it is equal to ::source except for the aspect ratio
- * which is undefined(0) and is ignored.
- */
- video_format_t fmt;
-
- /* Informations
- *
- * You can only set them in the open function.
- */
- vout_display_info_t info;
-
- /* Return a pointer over the current picture_pool_t* (mandatory).
- *
- * For performance reasons, it is best to provide at least count
- * pictures but it is not mandatory.
- * You can return NULL when you cannot/do not want to allocate
- * pictures.
- * The vout display module keeps the ownership of the pool and can
- * destroy it only when closing or on invalid pictures control.
- */
- picture_pool_t *(*pool)(vout_display_t *, unsigned count);
-
- /* Prepare a picture for display (optional).
- *
- * It is called before the next pf_display call to provide as much
- * time as possible to prepare the given picture for display.
- * You are guaranted that pf_display will always be called and using
- * the exact same picture_t.
- * You cannot change the pixel content of the picture_t.
- */
- void (*prepare)(vout_display_t *, picture_t *);
-
- /* Display a picture (mandatory).
- *
- * The picture must be displayed as soon as possible.
- * You cannot change the pixel content of the picture_t.
- *
- * This function gives away the ownership of the picture, so you must
- * release it as soon as possible.
- */
- void (*display)(vout_display_t *, picture_t *);
-
- /* Control on the module (mandatory) */
- int (*control)(vout_display_t *, int, va_list);
-
- /* Manage pending event (optional) */
- void (*manage)(vout_display_t *);
-
- /* Private place holder for the vout_display_t module (optional)
- *
- * A module is free to use it as it wishes.
- */
- vout_display_sys_t *sys;
-
- /* Reserved for the vout_display_t owner.
- *
- * It must not be overwritten nor used directly by a module.
- */
- vout_display_owner_t owner;
- };
-
- static inline void vout_display_SendEvent(vout_display_t *vd, int query, ...)
- {
- va_list args;
- va_start(args, query);
- vd->owner.event(vd, query, args);
- va_end(args);
- }
-
- static inline void vout_display_SendEventDisplaySize(vout_display_t *vd, int width, int height, bool is_fullscreen)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_DISPLAY_SIZE, width, height, is_fullscreen);
- }
- static inline void vout_display_SendEventPicturesInvalid(vout_display_t *vd)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_PICTURES_INVALID);
- }
- static inline void vout_display_SendEventClose(vout_display_t *vd)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_CLOSE);
- }
- static inline void vout_display_SendEventKey(vout_display_t *vd, int key)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_KEY, key);
- }
- static inline void vout_display_SendEventFullscreen(vout_display_t *vd, bool is_fullscreen)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_FULLSCREEN, is_fullscreen);
- }
- static inline void vout_display_SendWindowState(vout_display_t *vd, unsigned state)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_WINDOW_STATE, state);
- }
- /* The mouse position (State and Moved event) must be expressed against vout_display_t::source unit */
- static inline void vout_display_SendEventMouseState(vout_display_t *vd, int x, int y, int button_mask)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_STATE, x, y, button_mask);
- }
- static inline void vout_display_SendEventMouseMoved(vout_display_t *vd, int x, int y)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_MOVED, x, y);
- }
- static inline void vout_display_SendEventMousePressed(vout_display_t *vd, int button)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_PRESSED, button);
- }
- static inline void vout_display_SendEventMouseReleased(vout_display_t *vd, int button)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_RELEASED, button);
- }
- static inline void vout_display_SendEventMouseDoubleClick(vout_display_t *vd)
- {
- vout_display_SendEvent(vd, VOUT_DISPLAY_EVENT_MOUSE_DOUBLE_CLICK);
- }
-
- /**
- * Asks for a new window with the given configuration as hint.
- *
- * b_standalone/i_x/i_y may be overwritten by the core
- */
- static inline vout_window_t *vout_display_NewWindow(vout_display_t *vd, const vout_window_cfg_t *cfg)
- {
- return vd->owner.window_new(vd, cfg);
- }
- static inline void vout_display_DeleteWindow(vout_display_t *vd,
- vout_window_t *window)
- {
- vd->owner.window_del(vd, window);
- }
-
- /**
- * Computes the default display size given the source and
- * the display configuration.
- *
- * This asssumes that the picture is already cropped.
- */
- VLC_EXPORT( void, vout_display_GetDefaultDisplaySize, (unsigned *width, unsigned *height, const video_format_t *source, const vout_display_cfg_t *) );
-
-
- /**
- * Structure used to store the result of a vout_display_PlacePicture.
- */
- typedef struct {
- int x;
- int y;
- unsigned width;
- unsigned height;
- } vout_display_place_t;
-
- /**
- * Computes how to place a picture inside the display to respect
- * the given parameters.
- * This assumes that cropping is done by an external mean.
- *
- * \param p_place Place inside the window (window pixel unit)
- * \param p_source Video source format
- * \param p_cfg Display configuration
- * \param b_clip If true, prevent the video to go outside the display (break zoom).
- */
- 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) );
-
- #endif /* VLC_VOUT_DISPLAY_H */
-
-