1 /*****************************************************************************
2 * vlc_video.h: common video definitions
3 * This header is required by all modules which have to handle pictures. It
4 * includes all common video types and constants.
5 *****************************************************************************
6 * Copyright (C) 1999, 2000 VideoLAN
7 * $Id: vlc_video.h,v 1.3 2003/10/04 15:51:22 sigmunau Exp $
9 * Authors: Vincent Seguin <seguin@via.ecp.fr>
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
27 * Description of a planar graphic field
29 typedef struct plane_t
31 uint8_t *p_pixels; /**< Start of the plane's data */
33 /* Variables used for fast memcpy operations */
34 int i_lines; /**< Number of lines */
35 int i_pitch; /**< Number of bytes in a line, including margins */
37 /** Size of a macropixel, defaults to 1 */
40 /* Variables used for pictures with margins */
41 int i_visible_pitch; /**< How many visible pixels are there ? */
48 * Any picture destined to be displayed by a video output thread should be
49 * stored in this structure from it's creation to it's effective display.
50 * Picture type and flags should only be modified by the output thread. Note
51 * that an empty picture MUST have its flags set to 0.
55 /** Picture data - data can always be freely modified, but p_data may
56 * NEVER be modified. A direct buffer can be handled as the plugin
57 * wishes, it can even swap p_pixels buffers. */
59 void *p_data_orig; /**< pointer before memalign */
60 plane_t p[ VOUT_MAX_PLANES ]; /**< description of the planes */
61 int i_planes; /**< number of allocated planes */
63 /** \name Type and flags
64 * Should NOT be modified except by the vout thread
66 int i_status; /**< picture flags */
67 int i_type; /**< is picture a direct buffer ? */
68 int i_matrix_coefficients; /**< in YUV type, encoding type */
71 /** \name Picture management properties
72 * These properties can be modified using the video output thread API,
73 * but should never be written directly */
75 int i_refcount; /**< link reference counter */
76 mtime_t date; /**< display date */
80 /** \name Picture dynamic properties
81 * Those properties can be changed by the decoder
84 vlc_bool_t b_progressive; /**< is it a progressive frame ? */
85 unsigned int i_nb_fields; /**< # of displayed fields */
86 vlc_bool_t b_top_field_first; /**< which field is first */
89 /** The picture heap we are attached to */
90 picture_heap_t* p_heap;
92 /* Some vouts require the picture to be locked before it can be modified */
93 int (* pf_lock) ( vout_thread_t *, picture_t * );
94 int (* pf_unlock) ( vout_thread_t *, picture_t * );
96 /** Private data - the video output plugin might want to put stuff here to
97 * keep track of the picture */
98 picture_sys_t * p_sys;
102 * Video picture heap, either render (to store pictures used
103 * by the decoder) or output (to store pictures displayed by the vout plugin)
105 struct picture_heap_t
107 int i_pictures; /**< current heap size */
109 /* \name Picture static properties
110 * Those properties are fixed at initialization and should NOT be modified
113 unsigned int i_width; /**< picture width */
114 unsigned int i_height; /**< picture height */
115 vlc_fourcc_t i_chroma; /**< picture chroma */
116 unsigned int i_aspect; /**< aspect ratio */
120 picture_t* pp_picture[VOUT_MAX_PICTURES]; /**< pictures */
121 int i_last_used_pic; /**< last used pic in heap */
122 vlc_bool_t b_allow_modify_pics;
124 /* Stuff used for truecolor RGB planes */
125 int i_rmask, i_rrshift, i_lrshift;
126 int i_gmask, i_rgshift, i_lgshift;
127 int i_bmask, i_rbshift, i_lbshift;
129 /** Stuff used for palettized RGB planes */
130 void (* pf_setpalette) ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
133 /*****************************************************************************
134 * Flags used to describe the status of a picture
135 *****************************************************************************/
138 #define EMPTY_PICTURE 0 /* empty buffer */
139 #define MEMORY_PICTURE 100 /* heap-allocated buffer */
140 #define DIRECT_PICTURE 200 /* direct buffer */
143 #define FREE_PICTURE 0 /* free and not allocated */
144 #define RESERVED_PICTURE 1 /* allocated and reserved */
145 #define RESERVED_DATED_PICTURE 2 /* waiting for DisplayPicture */
146 #define RESERVED_DISP_PICTURE 3 /* waiting for a DatePicture */
147 #define READY_PICTURE 4 /* ready for display */
148 #define DISPLAYED_PICTURE 5 /* been displayed but is linked */
149 #define DESTROYED_PICTURE 6 /* allocated but no more used */
151 /*****************************************************************************
152 * Shortcuts to access image components
153 *****************************************************************************/
161 #define Y_PIXELS p[Y_PLANE].p_pixels
162 #define Y_PITCH p[Y_PLANE].i_pitch
163 #define U_PIXELS p[U_PLANE].p_pixels
164 #define U_PITCH p[U_PLANE].i_pitch
165 #define V_PIXELS p[V_PLANE].p_pixels
166 #define V_PITCH p[V_PLANE].i_pitch
169 * \defgroup subpicture Video Subpictures
170 * Subpictures are pictures that should be displayed on top of the video, like
172 * \ingroup video_output
179 * Any subtitle destined to be displayed by a video output thread should
180 * be stored in this structure from it's creation to it's effective display.
181 * Subtitle type and flags should only be modified by the output thread. Note
182 * that an empty subtitle MUST have its flags set to 0.
186 /** \name Type and flags
187 Should NOT be modified except by the vout thread */
189 int i_type; /**< type */
190 int i_status; /**< flags */
191 subpicture_t * p_next; /**< next subtitle to be displayed */
194 /** \name Date properties */
196 mtime_t i_start; /**< beginning of display date */
197 mtime_t i_stop; /**< end of display date */
198 vlc_bool_t b_ephemer; /**< If this flag is set to true
199 the subtitle will be displayed
200 untill the next one appear */
203 /** \name Display properties
204 * These properties are only indicative and may be
205 * changed by the video output thread, or simply ignored depending of the
208 int i_x; /**< offset from alignment position */
209 int i_y; /**< offset from alignment position */
210 int i_width; /**< picture width */
211 int i_height; /**< picture height */
214 /* Additionnal properties depending of the subpicture type */
217 /* Text subpictures properties - text is stored in data area, in ASCIIZ
221 vout_font_t * p_font; /* font, NULL for default */
222 int i_style; /* text style */
223 uint32_t i_char_color; /* character color */
224 uint32_t i_border_color; /* border color */
225 uint32_t i_bg_color; /* background color */
230 /** Pointer to function that renders this subtitle in a picture */
231 void ( *pf_render ) ( vout_thread_t *, picture_t *, const subpicture_t * );
232 /** Pointer to function that cleans up the private data of this subtitle */
233 void ( *pf_destroy ) ( subpicture_t * );
235 /** Private data - the subtitle plugin might want to put stuff here to
236 * keep track of the subpicture */
237 subpicture_sys_t *p_sys; /* subpicture data */
240 /* Subpicture type */
241 #define EMPTY_SUBPICTURE 0 /* subtitle slot is empty and available */
242 #define MEMORY_SUBPICTURE 100 /* subpicture stored in memory */
244 /* Subpicture status */
245 #define FREE_SUBPICTURE 0 /* free and not allocated */
246 #define RESERVED_SUBPICTURE 1 /* allocated and reserved */
247 #define READY_SUBPICTURE 2 /* ready for display */