1 /*****************************************************************************
2 * vlc_video.h: common video definitions
3 *****************************************************************************
4 * Copyright (C) 1999 - 2008 the VideoLAN team
7 * Authors: Vincent Seguin <seguin@via.ecp.fr>
8 * Samuel Hocevar <sam@via.ecp.fr>
9 * Olivier Aubert <oaubert 47 videolan d07 org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
31 * This file defines common video output structures and functions in vlc
35 #include <vlc_filter.h>
37 /** Description of a planar graphic field */
38 typedef struct plane_t
40 uint8_t *p_pixels; /**< Start of the plane's data */
42 /* Variables used for fast memcpy operations */
43 int i_lines; /**< Number of lines, including margins */
44 int i_pitch; /**< Number of bytes in a line, including margins */
46 /** Size of a macropixel, defaults to 1 */
49 /* Variables used for pictures with margins */
50 int i_visible_lines; /**< How many visible lines are there ? */
51 int i_visible_pitch; /**< How many visible pixels are there ? */
58 * Any picture destined to be displayed by a video output thread should be
59 * stored in this structure from it's creation to it's effective display.
60 * Picture type and flags should only be modified by the output thread. Note
61 * that an empty picture MUST have its flags set to 0.
66 * The properties of the picture
68 video_frame_format_t format;
70 /** Picture data - data can always be freely modified, but p_data may
71 * NEVER be modified. A direct buffer can be handled as the plugin
72 * wishes, it can even swap p_pixels buffers. */
74 void *p_data_orig; /**< pointer before memalign */
75 plane_t p[ VOUT_MAX_PLANES ]; /**< description of the planes */
76 int i_planes; /**< number of allocated planes */
78 /** \name Type and flags
79 * Should NOT be modified except by the vout thread
81 int i_status; /**< picture flags */
82 int i_type; /**< is picture a direct buffer ? */
83 bool b_slow; /**< is picture in slow memory ? */
86 /** \name Picture management properties
87 * These properties can be modified using the video output thread API,
88 * but should never be written directly */
90 unsigned i_refcount; /**< link reference counter */
91 mtime_t date; /**< display date */
95 /** \name Picture dynamic properties
96 * Those properties can be changed by the decoder
99 bool b_progressive; /**< is it a progressive frame ? */
100 unsigned int i_nb_fields; /**< # of displayed fields */
101 bool b_top_field_first; /**< which field is first */
102 uint8_t *p_q; /**< quantification table */
103 int i_qstride; /**< quantification stride */
104 int i_qtype; /**< quantification style */
107 /** The picture heap we are attached to */
108 picture_heap_t* p_heap;
110 /* Some vouts require the picture to be locked before it can be modified */
111 int (* pf_lock) ( vout_thread_t *, picture_t * );
112 int (* pf_unlock) ( vout_thread_t *, picture_t * );
114 /** Private data - the video output plugin might want to put stuff here to
115 * keep track of the picture */
116 picture_sys_t * p_sys;
118 /** This way the picture_Release can be overloaded */
119 void (*pf_release)( picture_t * );
121 /** Next picture in a FIFO a pictures */
122 struct picture_t *p_next;
126 * This function will create a new picture.
127 * The picture created will implement a default release management compatible
128 * with picture_Hold and picture_Release. This default management will release
129 * picture_sys_t *p_sys field if non NULL.
131 VLC_EXPORT( picture_t *, picture_New, ( vlc_fourcc_t i_chroma, int i_width, int i_height, int i_aspect ) );
134 * This function will force the destruction a picture.
135 * The value of the picture reference count should be 0 before entering this
137 * Unless used for reimplementing pf_release, you should not use this
138 * function but picture_Release.
140 VLC_EXPORT( void, picture_Delete, ( picture_t * ) );
143 * This function will increase the picture reference count.
144 * It will not have any effect on picture obtained from vout
146 static inline void picture_Hold( picture_t *p_picture )
148 if( p_picture->pf_release )
149 p_picture->i_refcount++;
152 * This function will release a picture.
153 * It will not have any effect on picture obtained from vout
155 static inline void picture_Release( picture_t *p_picture )
157 /* FIXME why do we let pf_release handle the i_refcount ? */
158 if( p_picture->pf_release )
159 p_picture->pf_release( p_picture );
163 * Cleanup quantization matrix data and set to 0
165 static inline void picture_CleanupQuant( picture_t *p_pic )
169 p_pic->i_qstride = 0;
174 * This function will copy all picture dynamic properties.
176 static inline void picture_CopyProperties( picture_t *p_dst, const picture_t *p_src )
178 p_dst->date = p_src->date;
179 p_dst->b_force = p_src->b_force;
181 p_dst->b_progressive = p_src->b_progressive;
182 p_dst->i_nb_fields = p_src->i_nb_fields;
183 p_dst->b_top_field_first = p_src->b_top_field_first;
185 /* FIXME: copy ->p_q and ->p_qstride */
189 * This function will copy the picture pixels.
190 * You can safely copy between pictures that do not have the same size,
191 * only the compatible(smaller) part will be copied.
193 VLC_EXPORT( void, picture_CopyPixels, ( picture_t *p_dst, const picture_t *p_src ) );
194 VLC_EXPORT( void, plane_CopyPixels, ( plane_t *p_dst, const plane_t *p_src ) );
197 * This function will copy both picture dynamic properties and pixels.
198 * You have to notice that sometime a simple picture_Hold may do what
199 * you want without the copy overhead.
200 * Provided for convenience.
202 * \param p_dst pointer to the destination picture.
203 * \param p_src pointer to the source picture.
205 static inline void picture_Copy( picture_t *p_dst, const picture_t *p_src )
207 picture_CopyPixels( p_dst, p_src );
208 picture_CopyProperties( p_dst, p_src );
212 * Video picture heap, either render (to store pictures used
213 * by the decoder) or output (to store pictures displayed by the vout plugin)
215 struct picture_heap_t
217 int i_pictures; /**< current heap size */
219 /* \name Picture static properties
220 * Those properties are fixed at initialization and should NOT be modified
223 unsigned int i_width; /**< picture width */
224 unsigned int i_height; /**< picture height */
225 vlc_fourcc_t i_chroma; /**< picture chroma */
226 unsigned int i_aspect; /**< aspect ratio */
230 picture_t* pp_picture[VOUT_MAX_PICTURES]; /**< pictures */
231 int i_last_used_pic; /**< last used pic in heap */
232 bool b_allow_modify_pics;
234 /* Stuff used for truecolor RGB planes */
235 uint32_t i_rmask; int i_rrshift, i_lrshift;
236 uint32_t i_gmask; int i_rgshift, i_lgshift;
237 uint32_t i_bmask; int i_rbshift, i_lbshift;
239 /** Stuff used for palettized RGB planes */
240 void (* pf_setpalette) ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
243 /*****************************************************************************
244 * Flags used to describe the status of a picture
245 *****************************************************************************/
248 * FIXME are the values meaningfull ? */
251 EMPTY_PICTURE = 0, /* empty buffer */
252 MEMORY_PICTURE = 100, /* heap-allocated buffer */
253 DIRECT_PICTURE = 200, /* direct buffer */
259 FREE_PICTURE, /* free and not allocated */
260 RESERVED_PICTURE, /* allocated and reserved */
261 READY_PICTURE, /* ready for display */
262 DISPLAYED_PICTURE, /* been displayed but is linked */
263 DESTROYED_PICTURE, /* allocated but no more used */
266 /* Quantification type */
276 /*****************************************************************************
277 * Shortcuts to access image components
278 *****************************************************************************/
290 #define Y_PIXELS p[Y_PLANE].p_pixels
291 #define Y_PITCH p[Y_PLANE].i_pitch
292 #define U_PIXELS p[U_PLANE].p_pixels
293 #define U_PITCH p[U_PLANE].i_pitch
294 #define V_PIXELS p[V_PLANE].p_pixels
295 #define V_PITCH p[V_PLANE].i_pitch
296 #define A_PIXELS p[A_PLANE].p_pixels
297 #define A_PITCH p[A_PLANE].i_pitch
300 * \defgroup subpicture Video Subpictures
301 * Subpictures are pictures that should be displayed on top of the video, like
303 * \ingroup video_output
308 * Video subtitle region spu core private
310 typedef struct subpicture_region_private_t subpicture_region_private_t;
313 * Video subtitle region
315 * A subtitle region is defined by a picture (graphic) and its rendering
317 * Subtitles contain a list of regions.
319 struct subpicture_region_t
321 video_format_t fmt; /**< format of the picture */
322 picture_t *p_picture; /**< picture comprising this region */
324 int i_x; /**< position of region */
325 int i_y; /**< position of region */
326 int i_align; /**< alignment within a region */
327 int i_alpha; /**< transparency */
329 char *psz_text; /**< text string comprising this region */
330 char *psz_html; /**< HTML version of subtitle (NULL = use psz_text) */
331 text_style_t *p_style; /**< a description of the text style formatting */
333 subpicture_region_t *p_next; /**< next region in the list */
334 subpicture_region_private_t *p_private; /**< Private data for spu_t *only* */
337 /* Subpicture region position flags */
338 #define SUBPICTURE_ALIGN_LEFT 0x1
339 #define SUBPICTURE_ALIGN_RIGHT 0x2
340 #define SUBPICTURE_ALIGN_TOP 0x4
341 #define SUBPICTURE_ALIGN_BOTTOM 0x8
342 #define SUBPICTURE_ALIGN_MASK ( SUBPICTURE_ALIGN_LEFT|SUBPICTURE_ALIGN_RIGHT| \
343 SUBPICTURE_ALIGN_TOP |SUBPICTURE_ALIGN_BOTTOM )
346 * This function will create a new subpicture region.
348 * You must use subpicture_region_Delete to destroy it.
350 VLC_EXPORT( subpicture_region_t *, subpicture_region_New, ( const video_format_t *p_fmt ) );
353 * This function will destroy a subpicture region allocated by
354 * subpicture_region_New.
356 * You may give it NULL.
358 VLC_EXPORT( void, subpicture_region_Delete, ( subpicture_region_t *p_region ) );
361 * This function will destroy a list of subpicture regions allocated by
362 * subpicture_region_New.
364 * Provided for convenience.
366 VLC_EXPORT( void, subpicture_region_ChainDelete, ( subpicture_region_t *p_head ) );
371 * Any subtitle destined to be displayed by a video output thread should
372 * be stored in this structure from it's creation to it's effective display.
373 * Subtitle type and flags should only be modified by the output thread. Note
374 * that an empty subtitle MUST have its flags set to 0.
378 /** \name Channel ID */
380 int i_channel; /**< subpicture channel ID */
383 /** \name Type and flags
384 Should NOT be modified except by the vout thread */
386 int64_t i_order; /** an increasing unique number */
387 subpicture_t * p_next; /**< next subtitle to be displayed */
390 /** \name Date properties */
392 mtime_t i_start; /**< beginning of display date */
393 mtime_t i_stop; /**< end of display date */
394 bool b_ephemer; /**< If this flag is set to true the subtitle
395 will be displayed untill the next one appear */
396 bool b_fade; /**< enable fading */
399 subpicture_region_t *p_region; /**< region list composing this subtitle */
401 /** \name Display properties
402 * These properties are only indicative and may be
403 * changed by the video output thread, or simply ignored depending of the
406 int i_original_picture_width; /**< original width of the movie */
407 int i_original_picture_height;/**< original height of the movie */
408 bool b_subtitle; /**< the picture is a movie subtitle */
409 bool b_absolute; /**< position is absolute */
410 int i_alpha; /**< transparency */
413 /** Pointer to function that renders this subtitle in a picture */
414 void ( *pf_render ) ( vout_thread_t *, picture_t *, const subpicture_t * );
415 /** Pointer to function that cleans up the private data of this subtitle */
416 void ( *pf_destroy ) ( subpicture_t * );
418 /** Pointer to functions for region management */
419 void (*pf_pre_render) ( spu_t *, subpicture_t *, const video_format_t * );
420 void (*pf_update_regions)( spu_t *,
421 subpicture_t *, const video_format_t *, mtime_t );
423 /** Private data - the subtitle plugin might want to put stuff here to
424 * keep track of the subpicture */
425 subpicture_sys_t *p_sys; /* subpicture data */
430 * This function create a new empty subpicture.
432 * You must use subpicture_Delete to destroy it.
434 VLC_EXPORT( subpicture_t *, subpicture_New, ( void ) );
437 * This function delete a subpicture created by subpicture_New.
438 * You may give it NULL.
440 VLC_EXPORT( void, subpicture_Delete, ( subpicture_t *p_subpic ) );
442 /* Default subpicture channel ID */
443 #define DEFAULT_CHAN 1
445 /*****************************************************************************
447 *****************************************************************************/
450 * Initialise different fields of a picture_t (but does not allocate memory).
451 * \param p_this a vlc object
452 * \param p_pic pointer to the picture structure.
453 * \param i_chroma the wanted chroma for the picture.
454 * \param i_width the wanted width for the picture.
455 * \param i_height the wanted height for the picture.
456 * \param i_aspect the wanted aspect ratio for the picture.
458 #define vout_InitPicture(a,b,c,d,e,f) \
459 __vout_InitPicture(VLC_OBJECT(a),b,c,d,e,f)
460 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 ) );
463 * Initialise different fields of a picture_t and allocates the picture buffer.
464 * \param p_this a vlc object
465 * \param p_pic pointer to the picture structure.
466 * \param i_chroma the wanted chroma for the picture.
467 * \param i_width the wanted width for the picture.
468 * \param i_height the wanted height for the picture.
469 * \param i_aspect the wanted aspect ratio for the picture.
471 #define vout_AllocatePicture(a,b,c,d,e,f) \
472 __vout_AllocatePicture(VLC_OBJECT(a),b,c,d,e,f)
473 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 ) );
477 * \defgroup video_output Video Output
478 * This module describes the programming interface for video output threads.
479 * It includes functions allowing to open a new thread, send pictures to a
480 * thread, and destroy a previously opened video output thread.
485 * Video ouput thread private structure
487 typedef struct vout_thread_sys_t vout_thread_sys_t;
490 * Video output thread descriptor
492 * Any independent video output device, such as an X11 window or a GGI device,
493 * is represented by a video output thread, and described using the following
500 /** \name Thread properties and locks */
502 vlc_mutex_t picture_lock; /**< picture heap lock */
503 vlc_mutex_t change_lock; /**< thread change lock */
504 vout_sys_t * p_sys; /**< system output method */
507 /** \name Current display properties */
509 uint16_t i_changes; /**< changes made to the thread.
510 \see \ref vout_changes */
511 unsigned b_fullscreen:1; /**< toogle fullscreen display */
512 unsigned b_autoscale:1; /**< auto scaling picture or not */
513 unsigned b_on_top:1; /**< stay always on top of other windows */
514 int i_zoom; /**< scaling factor if no auto */
515 unsigned int i_window_width; /**< video window width */
516 unsigned int i_window_height; /**< video window height */
517 unsigned int i_alignment; /**< video alignment in window */
521 /** \name Plugin used and shortcuts to access its capabilities */
524 int ( *pf_init ) ( vout_thread_t * );
525 void ( *pf_end ) ( vout_thread_t * );
526 int ( *pf_manage ) ( vout_thread_t * );
527 void ( *pf_render ) ( vout_thread_t *, picture_t * );
528 void ( *pf_display ) ( vout_thread_t *, picture_t * );
529 void ( *pf_swap ) ( vout_thread_t * ); /* OpenGL only */
530 int ( *pf_lock ) ( vout_thread_t * ); /* OpenGL only */
531 void ( *pf_unlock ) ( vout_thread_t * ); /* OpenGL only */
532 int ( *pf_control ) ( vout_thread_t *, int, va_list );
535 /** \name Video heap and translation tables */
537 int i_heap_size; /**< heap size */
538 picture_heap_t render; /**< rendered pictures */
539 picture_heap_t output; /**< direct buffers */
541 video_format_t fmt_render; /* render format (from the decoder) */
542 video_format_t fmt_in; /* input (modified render) format */
543 video_format_t fmt_out; /* output format (for the video output) */
547 picture_t p_picture[2*VOUT_MAX_PICTURES+1]; /**< pictures */
549 /* Subpicture unit */
552 /* Video output configuration */
553 config_chain_t *p_cfg;
555 /* Private vout_thread data */
556 vout_thread_sys_t *p;
559 #define I_OUTPUTPICTURES p_vout->output.i_pictures
560 #define PP_OUTPUTPICTURE p_vout->output.pp_picture
561 #define I_RENDERPICTURES p_vout->render.i_pictures
562 #define PP_RENDERPICTURE p_vout->render.pp_picture
564 /** \defgroup vout_changes Flags for changes
565 * These flags are set in the vout_thread_t::i_changes field when another
566 * thread changed a variable
569 /** b_info changed */
570 #define VOUT_INFO_CHANGE 0x0001
571 /** b_interface changed */
572 #define VOUT_INTF_CHANGE 0x0004
573 /** b_autoscale changed */
574 #define VOUT_SCALE_CHANGE 0x0008
575 /** b_on_top changed */
576 #define VOUT_ON_TOP_CHANGE 0x0010
577 /** b_cursor changed */
578 #define VOUT_CURSOR_CHANGE 0x0020
579 /** b_fullscreen changed */
580 #define VOUT_FULLSCREEN_CHANGE 0x0040
581 /** i_zoom changed */
582 #define VOUT_ZOOM_CHANGE 0x0080
584 #define VOUT_SIZE_CHANGE 0x0200
586 #define VOUT_DEPTH_CHANGE 0x0400
587 /** change chroma tables */
588 #define VOUT_CHROMA_CHANGE 0x0800
589 /** cropping parameters changed */
590 #define VOUT_CROP_CHANGE 0x1000
591 /** aspect ratio changed */
592 #define VOUT_ASPECT_CHANGE 0x2000
593 /** change/recreate picture buffers */
594 #define VOUT_PICTURE_BUFFERS_CHANGE 0x4000
597 /* Alignment flags */
598 #define VOUT_ALIGN_LEFT 0x0001
599 #define VOUT_ALIGN_RIGHT 0x0002
600 #define VOUT_ALIGN_HMASK 0x0003
601 #define VOUT_ALIGN_TOP 0x0004
602 #define VOUT_ALIGN_BOTTOM 0x0008
603 #define VOUT_ALIGN_VMASK 0x000C
605 #define MAX_JITTER_SAMPLES 20
607 /* scaling factor (applied to i_zoom in vout_thread_t) */
608 #define ZOOM_FP_FACTOR 1000
610 /*****************************************************************************
612 *****************************************************************************/
616 * - returns a suitable vout (if requested by a non NULL p_fmt)
617 * - recycles an old vout (if given) by either destroying it or by saving it
620 * The purpose of this function is to avoid unnecessary creation/destruction of
621 * vout (and to allow optional vout reusing).
623 * You can call vout_Request on a vout created by vout_Create or by a previous
624 * call to vout_Request.
625 * You can release the returned value either by vout_Request or vout_Close()
626 * followed by a vlc_object_release() or shorter vout_CloseAndRelease()
628 * \param p_this a vlc object
629 * \param p_vout a vout candidate
630 * \param p_fmt the video format requested or NULL
631 * \return a vout if p_fmt is non NULL and the request is successfull, NULL
634 #define vout_Request(a,b,c) __vout_Request(VLC_OBJECT(a),b,c)
635 VLC_EXPORT( vout_thread_t *, __vout_Request, ( vlc_object_t *p_this, vout_thread_t *p_vout, video_format_t *p_fmt ) );
638 * This function will create a suitable vout for a given p_fmt. It will never
639 * reuse an already existing unused vout.
641 * You have to call either vout_Close or vout_Request on the returned value
642 * \param p_this a vlc object to which the returned vout will be attached
643 * \param p_fmt the video format requested
644 * \return a vout if the request is successfull, NULL otherwise
646 #define vout_Create(a,b) __vout_Create(VLC_OBJECT(a),b)
647 VLC_EXPORT( vout_thread_t *, __vout_Create, ( vlc_object_t *p_this, video_format_t *p_fmt ) );
650 * This function will close a vout created by vout_Create or vout_Request.
651 * The associated vout module is closed.
652 * Note: It is not released yet, you'll have to call vlc_object_release()
653 * or use the convenient vout_CloseAndRelease().
655 * \param p_vout the vout to close
657 VLC_EXPORT( void, vout_Close, ( vout_thread_t *p_vout ) );
660 * This function will close a vout created by vout_Create
661 * and then release it.
663 * \param p_vout the vout to close and release
665 static inline void vout_CloseAndRelease( vout_thread_t *p_vout )
667 vout_Close( p_vout );
668 vlc_object_release( p_vout );
672 VLC_EXPORT( int, vout_ChromaCmp, ( uint32_t, uint32_t ) );
674 VLC_EXPORT( picture_t *, vout_CreatePicture, ( vout_thread_t *, bool, bool, unsigned int ) );
675 VLC_EXPORT( void, vout_InitFormat, ( video_frame_format_t *, uint32_t, int, int, int ) );
676 VLC_EXPORT( void, vout_DestroyPicture, ( vout_thread_t *, picture_t * ) );
677 VLC_EXPORT( void, vout_DisplayPicture, ( vout_thread_t *, picture_t * ) );
678 VLC_EXPORT( void, vout_LinkPicture, ( vout_thread_t *, picture_t * ) );
679 VLC_EXPORT( void, vout_UnlinkPicture, ( vout_thread_t *, picture_t * ) );
680 VLC_EXPORT( void, vout_PlacePicture, ( const vout_thread_t *, unsigned int, unsigned int, unsigned int *, unsigned int *, unsigned int *, unsigned int * ) );
682 void vout_IntfInit( vout_thread_t * );
683 VLC_EXPORT( void, vout_EnableFilter, ( vout_thread_t *, char *,bool , bool ) );
686 static inline int vout_vaControl( vout_thread_t *p_vout, int i_query,
689 if( p_vout->pf_control )
690 return p_vout->pf_control( p_vout, i_query, args );
695 static inline int vout_Control( vout_thread_t *p_vout, int i_query, ... )
700 va_start( args, i_query );
701 i_result = vout_vaControl( p_vout, i_query, args );
708 VOUT_SET_SIZE, /* arg1= unsigned int, arg2= unsigned int, res= */
709 VOUT_SET_STAY_ON_TOP, /* arg1= bool res= */
710 VOUT_SET_VIEWPORT, /* arg1= view rect, arg2=clip rect, res= */
711 VOUT_REDRAW_RECT, /* arg1= area rect, res= */
714 typedef struct snapshot_t {
715 char *p_data; /* Data area */
717 int i_width; /* In pixels */
718 int i_height; /* In pixels */
719 int i_datasize; /* In bytes */
720 mtime_t date; /* Presentation time */
721 vlc_cond_t p_condvar;
727 #endif /* _VLC_VIDEO_H */