vlc_video.h
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- /*****************************************************************************
- * vlc_video.h: common video definitions
- * This header is required by all modules which have to handle pictures. It
- * includes all common video types and constants.
- *****************************************************************************
- * Copyright (C) 1999, 2000 VideoLAN
- * $Id: vlc_video.h 9274 2004-11-10 15:16:51Z gbazin $
- *
- * Authors: Vincent Seguin <seguin@via.ecp.fr>
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #ifndef _VLC_VIDEO_H
- #define _VLC_VIDEO_H 1
- #include "vlc_es.h"
- /**
- * Description of a planar graphic field
- */
- typedef struct plane_t
- {
- uint8_t *p_pixels; /**< Start of the plane's data */
- /* Variables used for fast memcpy operations */
- int i_lines; /**< Number of lines, including margins */
- int i_pitch; /**< Number of bytes in a line, including margins */
- /** Size of a macropixel, defaults to 1 */
- int i_pixel_pitch;
- /* Variables used for pictures with margins */
- int i_visible_lines; /**< How many visible lines are there ? */
- int i_visible_pitch; /**< How many visible pixels are there ? */
- } plane_t;
- /**
- * Video picture
- *
- * Any picture destined to be displayed by a video output thread should be
- * stored in this structure from it's creation to it's effective display.
- * Picture type and flags should only be modified by the output thread. Note
- * that an empty picture MUST have its flags set to 0.
- */
- struct picture_t
- {
- /**
- * The properties of the picture
- */
- video_frame_format_t format;
- /** Picture data - data can always be freely modified, but p_data may
- * NEVER be modified. A direct buffer can be handled as the plugin
- * wishes, it can even swap p_pixels buffers. */
- uint8_t *p_data;
- void *p_data_orig; /**< pointer before memalign */
- plane_t p[ VOUT_MAX_PLANES ]; /**< description of the planes */
- int i_planes; /**< number of allocated planes */
- /** name Type and flags
- * Should NOT be modified except by the vout thread
- * @{*/
- int i_status; /**< picture flags */
- int i_type; /**< is picture a direct buffer ? */
- vlc_bool_t b_slow; /**< is picture in slow memory ? */
- int i_matrix_coefficients; /**< in YUV type, encoding type */
- /**@}*/
- /** name Picture management properties
- * These properties can be modified using the video output thread API,
- * but should never be written directly */
- /**@{*/
- int i_refcount; /**< link reference counter */
- mtime_t date; /**< display date */
- vlc_bool_t b_force;
- /**@}*/
- /** name Picture dynamic properties
- * Those properties can be changed by the decoder
- * @{
- */
- vlc_bool_t b_progressive; /**< is it a progressive frame ? */
- unsigned int i_nb_fields; /**< # of displayed fields */
- vlc_bool_t b_top_field_first; /**< which field is first */
- /**@}*/
- /** The picture heap we are attached to */
- picture_heap_t* p_heap;
- /* Some vouts require the picture to be locked before it can be modified */
- int (* pf_lock) ( vout_thread_t *, picture_t * );
- int (* pf_unlock) ( vout_thread_t *, picture_t * );
- /** Private data - the video output plugin might want to put stuff here to
- * keep track of the picture */
- picture_sys_t * p_sys;
- /** This way the picture_Release can be overloaded */
- void (*pf_release)( picture_t * );
- };
- /**
- * Video picture heap, either render (to store pictures used
- * by the decoder) or output (to store pictures displayed by the vout plugin)
- */
- struct picture_heap_t
- {
- int i_pictures; /**< current heap size */
- /* name Picture static properties
- * Those properties are fixed at initialization and should NOT be modified
- * @{
- */
- unsigned int i_width; /**< picture width */
- unsigned int i_height; /**< picture height */
- vlc_fourcc_t i_chroma; /**< picture chroma */
- unsigned int i_aspect; /**< aspect ratio */
- /**@}*/
- /* Real pictures */
- picture_t* pp_picture[VOUT_MAX_PICTURES]; /**< pictures */
- int i_last_used_pic; /**< last used pic in heap */
- vlc_bool_t b_allow_modify_pics;
- /* Stuff used for truecolor RGB planes */
- int i_rmask, i_rrshift, i_lrshift;
- int i_gmask, i_rgshift, i_lgshift;
- int i_bmask, i_rbshift, i_lbshift;
- /** Stuff used for palettized RGB planes */
- void (* pf_setpalette) ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
- };
- /*****************************************************************************
- * Flags used to describe the status of a picture
- *****************************************************************************/
- /* Picture type */
- #define EMPTY_PICTURE 0 /* empty buffer */
- #define MEMORY_PICTURE 100 /* heap-allocated buffer */
- #define DIRECT_PICTURE 200 /* direct buffer */
- /* Picture status */
- #define FREE_PICTURE 0 /* free and not allocated */
- #define RESERVED_PICTURE 1 /* allocated and reserved */
- #define RESERVED_DATED_PICTURE 2 /* waiting for DisplayPicture */
- #define RESERVED_DISP_PICTURE 3 /* waiting for a DatePicture */
- #define READY_PICTURE 4 /* ready for display */
- #define DISPLAYED_PICTURE 5 /* been displayed but is linked */
- #define DESTROYED_PICTURE 6 /* allocated but no more used */
- /*****************************************************************************
- * Shortcuts to access image components
- *****************************************************************************/
- /* Plane indices */
- #define Y_PLANE 0
- #define U_PLANE 1
- #define V_PLANE 2
- #define A_PLANE 3
- /* Shortcuts */
- #define Y_PIXELS p[Y_PLANE].p_pixels
- #define Y_PITCH p[Y_PLANE].i_pitch
- #define U_PIXELS p[U_PLANE].p_pixels
- #define U_PITCH p[U_PLANE].i_pitch
- #define V_PIXELS p[V_PLANE].p_pixels
- #define V_PITCH p[V_PLANE].i_pitch
- #define A_PIXELS p[A_PLANE].p_pixels
- #define A_PITCH p[A_PLANE].i_pitch
- /**
- * defgroup subpicture Video Subpictures
- * Subpictures are pictures that should be displayed on top of the video, like
- * subtitles and OSD
- * ingroup video_output
- * @{
- */
- /**
- * Video subtitle region
- *
- * A subtitle region is defined by a picture (graphic) and its rendering
- * coordinates.
- * Subtitles contain a list of regions.
- */
- struct subpicture_region_t
- {
- /** name Region properties */
- /**@{*/
- video_format_t fmt; /**< format of the picture */
- picture_t picture; /**< picture comprising this region */
- char *psz_text; /**< text string comprising this region */
- int i_x; /**< position of region */
- int i_y; /**< position of region */
- subpicture_region_t *p_next; /**< next region in the list */
- subpicture_region_t *p_cache; /**< modified version of this region */
- /**@}*/
- };
- /**
- * Video subtitle
- *
- * Any subtitle destined to be displayed by a video output thread should
- * be stored in this structure from it's creation to it's effective display.
- * Subtitle type and flags should only be modified by the output thread. Note
- * that an empty subtitle MUST have its flags set to 0.
- */
- struct subpicture_t
- {
- /** name Channel ID */
- /**@{*/
- int i_channel; /**< subpicture channel ID */
- /**@}*/
- /** name Type and flags
- Should NOT be modified except by the vout thread */
- /**@{*/
- int i_type; /**< type */
- int i_status; /**< flags */
- subpicture_t * p_next; /**< next subtitle to be displayed */
- /**@}*/
- /** name Date properties */
- /**@{*/
- mtime_t i_start; /**< beginning of display date */
- mtime_t i_stop; /**< end of display date */
- vlc_bool_t b_ephemer; /**< If this flag is set to true
- the subtitle will be displayed
- untill the next one appear */
- vlc_bool_t b_fade; /**< enable fading */
- /**@}*/
- subpicture_region_t *p_region; /**< region list composing this subtitle */
- /** name Display properties
- * These properties are only indicative and may be
- * changed by the video output thread, or simply ignored depending of the
- * subtitle type. */
- /**@{*/
- int i_x; /**< offset from alignment position */
- int i_y; /**< offset from alignment position */
- int i_width; /**< picture width */
- int i_height; /**< picture height */
- int i_original_picture_width; /**< original width of the movie */
- int i_original_picture_height;/**< original height of the movie */
- int b_absolute; /**< position is absolute */
- int i_flags; /**< position flags */
- /**@}*/
- /** Pointer to function that renders this subtitle in a picture */
- void ( *pf_render ) ( vout_thread_t *, picture_t *, const subpicture_t * );
- /** Pointer to function that cleans up the private data of this subtitle */
- void ( *pf_destroy ) ( subpicture_t * );
- /** Pointer to functions for region management */
- subpicture_region_t * ( *pf_create_region ) ( vlc_object_t *,
- video_format_t * );
- void ( *pf_destroy_region ) ( vlc_object_t *, subpicture_region_t * );
- /** Private data - the subtitle plugin might want to put stuff here to
- * keep track of the subpicture */
- subpicture_sys_t *p_sys; /* subpicture data */
- };
- /* Subpicture type */
- #define EMPTY_SUBPICTURE 0 /* subtitle slot is empty and available */
- #define MEMORY_SUBPICTURE 100 /* subpicture stored in memory */
- /* Default subpicture channel ID */
- #define DEFAULT_CHAN 1
- /* Subpicture status */
- #define FREE_SUBPICTURE 0 /* free and not allocated */
- #define RESERVED_SUBPICTURE 1 /* allocated and reserved */
- #define READY_SUBPICTURE 2 /* ready for display */
- /* Subpicture position flags */
- #define SUBPICTURE_ALIGN_LEFT 0x1
- #define SUBPICTURE_ALIGN_RIGHT 0x2
- #define SUBPICTURE_ALIGN_TOP 0x4
- #define SUBPICTURE_ALIGN_BOTTOM 0x8
- /*****************************************************************************
- * Prototypes
- *****************************************************************************/
- /**
- * vout_CopyPicture
- *
- * Copy the source picture onto the destination picture.
- * param p_this a vlc object
- * param p_dst pointer to the destination picture.
- * param p_src pointer to the source picture.
- */
- #define vout_CopyPicture(a,b,c) __vout_CopyPicture(VLC_OBJECT(a),b,c)
- VLC_EXPORT( void, __vout_CopyPicture, ( vlc_object_t *p_this, picture_t *p_dst, picture_t *p_src ) );
- /**
- * vout_InitPicture
- *
- * Initialise different fields of a picture_t (but does not allocate memory).
- * param p_this a vlc object
- * param p_pic pointer to the picture structure.
- * param i_chroma the wanted chroma for the picture.
- * param i_width the wanted width for the picture.
- * param i_height the wanted height for the picture.
- * param i_aspect the wanted aspect ratio for the picture.
- */
- #define vout_InitPicture(a,b,c,d,e,f)
- __vout_InitPicture(VLC_OBJECT(a),b,c,d,e,f)
- VLC_EXPORT( int, __vout_InitPicture, ( vlc_object_t *p_this, picture_t *p_pic, uint32_t i_chroma, int i_width, int i_height, int i_aspect ) );
- /**
- * vout_AllocatePicture
- *
- * Initialise different fields of a picture_t and allocates the picture buffer.
- * param p_this a vlc object
- * param p_pic pointer to the picture structure.
- * param i_chroma the wanted chroma for the picture.
- * param i_width the wanted width for the picture.
- * param i_height the wanted height for the picture.
- * param i_aspect the wanted aspect ratio for the picture.
- */
- #define vout_AllocatePicture(a,b,c,d,e,f)
- __vout_AllocatePicture(VLC_OBJECT(a),b,c,d,e,f)
- VLC_EXPORT( int, __vout_AllocatePicture,( vlc_object_t *p_this, picture_t *p_pic, uint32_t i_chroma, int i_width, int i_height, int i_aspect ) );
- /**@}*/
- #endif /* _VLC_VIDEO_H */