1 /*****************************************************************************
2 * vlc_video.h: common video definitions
3 *****************************************************************************
4 * Copyright (C) 1999 - 2005 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 *****************************************************************************/
26 #if !defined( __LIBVLC__ )
27 #error You are not libvlc or one of its plugins. You cannot include this file
31 #define _VLC_VOUT_H_ 1
35 /** Description of a planar graphic field */
36 typedef struct plane_t
38 uint8_t *p_pixels; /**< Start of the plane's data */
40 /* Variables used for fast memcpy operations */
41 int i_lines; /**< Number of lines, including margins */
42 int i_pitch; /**< Number of bytes in a line, including margins */
44 /** Size of a macropixel, defaults to 1 */
47 /* Variables used for pictures with margins */
48 int i_visible_lines; /**< How many visible lines are there ? */
49 int i_visible_pitch; /**< How many visible pixels are there ? */
56 * Any picture destined to be displayed by a video output thread should be
57 * stored in this structure from it's creation to it's effective display.
58 * Picture type and flags should only be modified by the output thread. Note
59 * that an empty picture MUST have its flags set to 0.
64 * The properties of the picture
66 video_frame_format_t format;
68 /** Picture data - data can always be freely modified, but p_data may
69 * NEVER be modified. A direct buffer can be handled as the plugin
70 * wishes, it can even swap p_pixels buffers. */
72 void *p_data_orig; /**< pointer before memalign */
73 plane_t p[ VOUT_MAX_PLANES ]; /**< description of the planes */
74 int i_planes; /**< number of allocated planes */
76 /** \name Type and flags
77 * Should NOT be modified except by the vout thread
79 int i_status; /**< picture flags */
80 int i_type; /**< is picture a direct buffer ? */
81 vlc_bool_t b_slow; /**< is picture in slow memory ? */
82 int i_matrix_coefficients; /**< in YUV type, encoding type */
85 /** \name Picture management properties
86 * These properties can be modified using the video output thread API,
87 * but should never be written directly */
89 int i_refcount; /**< link reference counter */
90 mtime_t date; /**< display date */
94 /** \name Picture dynamic properties
95 * Those properties can be changed by the decoder
98 vlc_bool_t b_progressive; /**< is it a progressive frame ? */
99 unsigned int i_nb_fields; /**< # of displayed fields */
100 vlc_bool_t b_top_field_first; /**< which field is first */
103 /** The picture heap we are attached to */
104 picture_heap_t* p_heap;
106 /* Some vouts require the picture to be locked before it can be modified */
107 int (* pf_lock) ( vout_thread_t *, picture_t * );
108 int (* pf_unlock) ( vout_thread_t *, picture_t * );
110 /** Private data - the video output plugin might want to put stuff here to
111 * keep track of the picture */
112 picture_sys_t * p_sys;
114 /** This way the picture_Release can be overloaded */
115 void (*pf_release)( picture_t * );
117 /** Next picture in a FIFO a pictures */
118 struct picture_t *p_next;
122 * Video picture heap, either render (to store pictures used
123 * by the decoder) or output (to store pictures displayed by the vout plugin)
125 struct picture_heap_t
127 int i_pictures; /**< current heap size */
129 /* \name Picture static properties
130 * Those properties are fixed at initialization and should NOT be modified
133 unsigned int i_width; /**< picture width */
134 unsigned int i_height; /**< picture height */
135 vlc_fourcc_t i_chroma; /**< picture chroma */
136 unsigned int i_aspect; /**< aspect ratio */
140 picture_t* pp_picture[VOUT_MAX_PICTURES]; /**< pictures */
141 int i_last_used_pic; /**< last used pic in heap */
142 vlc_bool_t b_allow_modify_pics;
144 /* Stuff used for truecolor RGB planes */
145 uint32_t i_rmask; int i_rrshift, i_lrshift;
146 uint32_t i_gmask; int i_rgshift, i_lgshift;
147 uint32_t i_bmask; int i_rbshift, i_lbshift;
149 /** Stuff used for palettized RGB planes */
150 void (* pf_setpalette) ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
153 /*****************************************************************************
154 * Flags used to describe the status of a picture
155 *****************************************************************************/
158 #define EMPTY_PICTURE 0 /* empty buffer */
159 #define MEMORY_PICTURE 100 /* heap-allocated buffer */
160 #define DIRECT_PICTURE 200 /* direct buffer */
163 #define FREE_PICTURE 0 /* free and not allocated */
164 #define RESERVED_PICTURE 1 /* allocated and reserved */
165 #define RESERVED_DATED_PICTURE 2 /* waiting for DisplayPicture */
166 #define RESERVED_DISP_PICTURE 3 /* waiting for a DatePicture */
167 #define READY_PICTURE 4 /* ready for display */
168 #define DISPLAYED_PICTURE 5 /* been displayed but is linked */
169 #define DESTROYED_PICTURE 6 /* allocated but no more used */
171 /*****************************************************************************
172 * Shortcuts to access image components
173 *****************************************************************************/
182 #define Y_PIXELS p[Y_PLANE].p_pixels
183 #define Y_PITCH p[Y_PLANE].i_pitch
184 #define U_PIXELS p[U_PLANE].p_pixels
185 #define U_PITCH p[U_PLANE].i_pitch
186 #define V_PIXELS p[V_PLANE].p_pixels
187 #define V_PITCH p[V_PLANE].i_pitch
188 #define A_PIXELS p[A_PLANE].p_pixels
189 #define A_PITCH p[A_PLANE].i_pitch
192 * \defgroup subpicture Video Subpictures
193 * Subpictures are pictures that should be displayed on top of the video, like
195 * \ingroup video_output
200 * Video subtitle region
202 * A subtitle region is defined by a picture (graphic) and its rendering
204 * Subtitles contain a list of regions.
206 struct subpicture_region_t
208 video_format_t fmt; /**< format of the picture */
209 picture_t picture; /**< picture comprising this region */
211 int i_x; /**< position of region */
212 int i_y; /**< position of region */
213 int i_align; /**< alignment within a region */
215 char *psz_text; /**< text string comprising this region */
216 text_style_t *p_style; /* a description of the text style formatting */
218 subpicture_region_t *p_next; /**< next region in the list */
219 subpicture_region_t *p_cache; /**< modified version of this region */
225 * Any subtitle destined to be displayed by a video output thread should
226 * be stored in this structure from it's creation to it's effective display.
227 * Subtitle type and flags should only be modified by the output thread. Note
228 * that an empty subtitle MUST have its flags set to 0.
232 /** \name Channel ID */
234 int i_channel; /**< subpicture channel ID */
237 /** \name Type and flags
238 Should NOT be modified except by the vout thread */
240 int i_type; /**< type */
241 int i_status; /**< flags */
242 subpicture_t * p_next; /**< next subtitle to be displayed */
245 /** \name Date properties */
247 mtime_t i_start; /**< beginning of display date */
248 mtime_t i_stop; /**< end of display date */
249 vlc_bool_t b_ephemer; /**< If this flag is set to true the subtitle
250 will be displayed untill the next one appear */
251 vlc_bool_t b_fade; /**< enable fading */
252 vlc_bool_t b_pausable; /**< subpicture will be paused if
256 subpicture_region_t *p_region; /**< region list composing this subtitle */
258 /** \name Display properties
259 * These properties are only indicative and may be
260 * changed by the video output thread, or simply ignored depending of the
263 int i_x; /**< offset from alignment position */
264 int i_y; /**< offset from alignment position */
265 int i_width; /**< picture width */
266 int i_height; /**< picture height */
267 int i_alpha; /**< transparency */
268 int i_original_picture_width; /**< original width of the movie */
269 int i_original_picture_height;/**< original height of the movie */
270 vlc_bool_t b_absolute; /**< position is absolute */
271 int i_flags; /**< position flags */
274 /** Pointer to function that renders this subtitle in a picture */
275 void ( *pf_render ) ( vout_thread_t *, picture_t *, const subpicture_t * );
276 /** Pointer to function that cleans up the private data of this subtitle */
277 void ( *pf_destroy ) ( subpicture_t * );
279 /** Pointer to functions for region management */
280 subpicture_region_t * ( *pf_create_region ) ( vlc_object_t *,
282 subpicture_region_t * ( *pf_make_region ) ( vlc_object_t *,
283 video_format_t *, picture_t * );
284 void ( *pf_destroy_region ) ( vlc_object_t *, subpicture_region_t * );
286 /** Private data - the subtitle plugin might want to put stuff here to
287 * keep track of the subpicture */
288 subpicture_sys_t *p_sys; /* subpicture data */
291 /* Subpicture type */
292 #define EMPTY_SUBPICTURE 0 /* subtitle slot is empty and available */
293 #define MEMORY_SUBPICTURE 100 /* subpicture stored in memory */
295 /* Default subpicture channel ID */
296 #define DEFAULT_CHAN 1
298 /* Subpicture status */
299 #define FREE_SUBPICTURE 0 /* free and not allocated */
300 #define RESERVED_SUBPICTURE 1 /* allocated and reserved */
301 #define READY_SUBPICTURE 2 /* ready for display */
303 /* Subpicture position flags */
304 #define SUBPICTURE_ALIGN_LEFT 0x1
305 #define SUBPICTURE_ALIGN_RIGHT 0x2
306 #define SUBPICTURE_ALIGN_TOP 0x4
307 #define SUBPICTURE_ALIGN_BOTTOM 0x8
309 /*****************************************************************************
311 *****************************************************************************/
314 * Copy the source picture onto the destination picture.
315 * \param p_this a vlc object
316 * \param p_dst pointer to the destination picture.
317 * \param p_src pointer to the source picture.
319 #define vout_CopyPicture(a,b,c) __vout_CopyPicture(VLC_OBJECT(a),b,c)
320 VLC_EXPORT( void, __vout_CopyPicture, ( vlc_object_t *p_this, picture_t *p_dst, picture_t *p_src ) );
323 * Initialise different fields of a picture_t (but does not allocate memory).
324 * \param p_this a vlc object
325 * \param p_pic pointer to the picture structure.
326 * \param i_chroma the wanted chroma for the picture.
327 * \param i_width the wanted width for the picture.
328 * \param i_height the wanted height for the picture.
329 * \param i_aspect the wanted aspect ratio for the picture.
331 #define vout_InitPicture(a,b,c,d,e,f) \
332 __vout_InitPicture(VLC_OBJECT(a),b,c,d,e,f)
333 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 ) );
336 * Initialise different fields of a picture_t and allocates the picture buffer.
337 * \param p_this a vlc object
338 * \param p_pic pointer to the picture structure.
339 * \param i_chroma the wanted chroma for the picture.
340 * \param i_width the wanted width for the picture.
341 * \param i_height the wanted height for the picture.
342 * \param i_aspect the wanted aspect ratio for the picture.
344 #define vout_AllocatePicture(a,b,c,d,e,f) \
345 __vout_AllocatePicture(VLC_OBJECT(a),b,c,d,e,f)
346 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 ) );
350 * \defgroup video_output Video Output
351 * This module describes the programming interface for video output threads.
352 * It includes functions allowing to open a new thread, send pictures to a
353 * thread, and destroy a previously opened video output thread.
358 * Chroma conversion function
360 * This is the prototype common to all conversion functions.
361 * \param p_vout video output thread
362 * \param p_source source picture
363 * \param p_dest destination picture
364 * Picture width and source dimensions must be multiples of 16.
366 typedef void (vout_chroma_convert_t)( vout_thread_t *,
367 picture_t *, picture_t * );
369 typedef struct vout_chroma_t
371 /** conversion functions */
372 vout_chroma_convert_t *pf_convert;
374 /** Private module-dependant data */
375 chroma_sys_t * p_sys; /* private data */
377 /** Plugin used and shortcuts to access its capabilities */
382 /** Maximum numbers of video filters2 that can be attached to a vout */
383 #define MAX_VFILTERS 10
386 * Video output thread descriptor
388 * Any independant video output device, such as an X11 window or a GGI device,
389 * is represented by a video output thread, and described using the following
396 /** \name Thread properties and locks */
398 vlc_mutex_t picture_lock; /**< picture heap lock */
399 vlc_mutex_t subpicture_lock; /**< subpicture heap lock */
400 vlc_mutex_t change_lock; /**< thread change lock */
401 vout_sys_t * p_sys; /**< system output method */
404 /** \name Current display properties */
406 uint16_t i_changes; /**< changes made to the thread.
407 \see \ref vout_changes */
408 float f_gamma; /**< gamma */
409 vlc_bool_t b_grayscale; /**< color or grayscale display */
410 vlc_bool_t b_info; /**< print additional information */
411 vlc_bool_t b_interface; /**< render interface */
412 vlc_bool_t b_scale; /**< allow picture scaling */
413 vlc_bool_t b_fullscreen; /**< toogle fullscreen display */
414 uint32_t render_time; /**< last picture render time */
415 unsigned int i_window_width; /**< video window width */
416 unsigned int i_window_height; /**< video window height */
417 unsigned int i_alignment; /**< video alignment in window */
418 unsigned int i_par_num; /**< monitor pixel aspect-ratio */
419 unsigned int i_par_den; /**< monitor pixel aspect-ratio */
421 intf_thread_t *p_parent_intf; /**< parent interface for embedded
425 /** \name Plugin used and shortcuts to access its capabilities */
428 int ( *pf_init ) ( vout_thread_t * );
429 void ( *pf_end ) ( vout_thread_t * );
430 int ( *pf_manage ) ( vout_thread_t * );
431 void ( *pf_render ) ( vout_thread_t *, picture_t * );
432 void ( *pf_display ) ( vout_thread_t *, picture_t * );
433 void ( *pf_swap ) ( vout_thread_t * ); /* OpenGL only */
434 int ( *pf_lock ) ( vout_thread_t * ); /* OpenGL only */
435 void ( *pf_unlock ) ( vout_thread_t * ); /* OpenGL only */
436 int ( *pf_control ) ( vout_thread_t *, int, va_list );
440 * These numbers are not supposed to be accurate, but are a
441 * good indication of the thread status */
443 count_t c_fps_samples; /**< picture counts */
444 mtime_t p_fps_sample[VOUT_FPS_SAMPLES]; /**< FPS samples dates */
447 /** \name Video heap and translation tables */
449 int i_heap_size; /**< heap size */
450 picture_heap_t render; /**< rendered pictures */
451 picture_heap_t output; /**< direct buffers */
452 vlc_bool_t b_direct; /**< rendered are like direct ? */
453 vout_chroma_t chroma; /**< translation tables */
455 video_format_t fmt_render; /* render format (from the decoder) */
456 video_format_t fmt_in; /* input (modified render) format */
457 video_format_t fmt_out; /* output format (for the video output) */
461 picture_t p_picture[2*VOUT_MAX_PICTURES+1]; /**< pictures */
463 /* Subpicture unit */
468 count_t c_pictures, c_late_pictures;
469 mtime_t display_jitter; /**< average deviation from the PTS */
470 count_t c_jitter_samples; /**< number of samples used
471 for the calculation of the
473 /** delay created by internal caching */
477 char *psz_filter_chain;
478 vlc_bool_t b_filter_change;
480 /* Video filter2 chain
481 * these are handled like in transcode.c
482 * XXX: we might need to merge the two chains (v1 and v2 filters) */
483 char *psz_vfilters[MAX_VFILTERS];
484 config_chain_t *p_vfilters_cfg[MAX_VFILTERS];
487 filter_t *pp_vfilters[MAX_VFILTERS];
490 vlc_bool_t b_vfilter_change;
493 vlc_bool_t b_snapshot; /**< take one snapshot on the next loop */
496 #define I_OUTPUTPICTURES p_vout->output.i_pictures
497 #define PP_OUTPUTPICTURE p_vout->output.pp_picture
498 #define I_RENDERPICTURES p_vout->render.i_pictures
499 #define PP_RENDERPICTURE p_vout->render.pp_picture
501 /** \defgroup vout_changes Flags for changes
502 * These flags are set in the vout_thread_t::i_changes field when another
503 * thread changed a variable
506 /** b_info changed */
507 #define VOUT_INFO_CHANGE 0x0001
508 /** b_grayscale changed */
509 #define VOUT_GRAYSCALE_CHANGE 0x0002
510 /** b_interface changed */
511 #define VOUT_INTF_CHANGE 0x0004
512 /** b_scale changed */
513 #define VOUT_SCALE_CHANGE 0x0008
515 #define VOUT_GAMMA_CHANGE 0x0010
516 /** b_cursor changed */
517 #define VOUT_CURSOR_CHANGE 0x0020
518 /** b_fullscreen changed */
519 #define VOUT_FULLSCREEN_CHANGE 0x0040
521 #define VOUT_SIZE_CHANGE 0x0200
523 #define VOUT_DEPTH_CHANGE 0x0400
524 /** change chroma tables */
525 #define VOUT_CHROMA_CHANGE 0x0800
526 /** cropping parameters changed */
527 #define VOUT_CROP_CHANGE 0x1000
528 /** aspect ratio changed */
529 #define VOUT_ASPECT_CHANGE 0x2000
530 /** change/recreate picture buffers */
531 #define VOUT_PICTURE_BUFFERS_CHANGE 0x4000
534 /* Alignment flags */
535 #define VOUT_ALIGN_LEFT 0x0001
536 #define VOUT_ALIGN_RIGHT 0x0002
537 #define VOUT_ALIGN_HMASK 0x0003
538 #define VOUT_ALIGN_TOP 0x0004
539 #define VOUT_ALIGN_BOTTOM 0x0008
540 #define VOUT_ALIGN_VMASK 0x000C
542 #define MAX_JITTER_SAMPLES 20
544 /*****************************************************************************
546 *****************************************************************************/
547 #define vout_Request(a,b,c) __vout_Request(VLC_OBJECT(a),b,c)
548 VLC_EXPORT( vout_thread_t *, __vout_Request, ( vlc_object_t *, vout_thread_t *, video_format_t * ) );
549 #define vout_Create(a,b) __vout_Create(VLC_OBJECT(a),b)
550 VLC_EXPORT( vout_thread_t *, __vout_Create, ( vlc_object_t *, video_format_t * ) );
551 VLC_EXPORT( void, vout_Destroy, ( vout_thread_t * ) );
552 VLC_EXPORT( int, vout_VarCallback, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );
554 VLC_EXPORT( int, vout_ChromaCmp, ( uint32_t, uint32_t ) );
556 VLC_EXPORT( picture_t *, vout_CreatePicture, ( vout_thread_t *, vlc_bool_t, vlc_bool_t, unsigned int ) );
557 VLC_EXPORT( void, vout_InitFormat, ( video_frame_format_t *, uint32_t, int, int, int ) );
558 VLC_EXPORT( void, vout_DestroyPicture, ( vout_thread_t *, picture_t * ) );
559 VLC_EXPORT( void, vout_DisplayPicture, ( vout_thread_t *, picture_t * ) );
560 VLC_EXPORT( void, vout_DatePicture, ( vout_thread_t *, picture_t *, mtime_t ) );
561 VLC_EXPORT( void, vout_LinkPicture, ( vout_thread_t *, picture_t * ) );
562 VLC_EXPORT( void, vout_UnlinkPicture, ( vout_thread_t *, picture_t * ) );
563 VLC_EXPORT( void, vout_PlacePicture, ( vout_thread_t *, unsigned int, unsigned int, unsigned int *, unsigned int *, unsigned int *, unsigned int * ) );
564 picture_t * vout_RenderPicture ( vout_thread_t *, picture_t *,
567 VLC_EXPORT( int, vout_vaControlDefault, ( vout_thread_t *, int, va_list ) );
568 VLC_EXPORT( void *, vout_RequestWindow, ( vout_thread_t *, int *, int *, unsigned int *, unsigned int * ) );
569 VLC_EXPORT( void, vout_ReleaseWindow, ( vout_thread_t *, void * ) );
570 VLC_EXPORT( int, vout_ControlWindow, ( vout_thread_t *, void *, int, va_list ) );
571 void vout_IntfInit( vout_thread_t * );
572 VLC_EXPORT( int, vout_Snapshot, ( vout_thread_t *p_vout, picture_t *p_pic ) );
573 VLC_EXPORT( void, vout_EnableFilter, ( vout_thread_t *, char *,vlc_bool_t , vlc_bool_t ) );
576 static inline int vout_vaControl( vout_thread_t *p_vout, int i_query,
579 if( p_vout->pf_control )
580 return p_vout->pf_control( p_vout, i_query, args );
585 static inline int vout_Control( vout_thread_t *p_vout, int i_query, ... )
590 va_start( args, i_query );
591 i_result = vout_vaControl( p_vout, i_query, args );
598 VOUT_GET_SIZE, /* arg1= unsigned int*, arg2= unsigned int*, res= */
599 VOUT_SET_SIZE, /* arg1= unsigned int, arg2= unsigned int, res= */
600 VOUT_SET_STAY_ON_TOP, /* arg1= vlc_bool_t res= */
604 VOUT_SET_FOCUS, /* arg1= vlc_bool_t res= */
605 VOUT_SET_VIEWPORT /* arg1= view rect, arg2=clip rect, res= */
608 typedef struct snapshot_t {
609 char *p_data; /* Data area */
611 int i_width; /* In pixels */
612 int i_height; /* In pixels */
613 int i_datasize; /* In bytes */
614 mtime_t date; /* Presentation time */
619 #endif /* _VLC_VIDEO_H */