git.sesse.net Git - vlc/blob - include/video_output.h

   1 /*****************************************************************************
   2  * video_output.h : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppenned video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 1999, 2000 VideoLAN
   8  *
   9  * Authors:
  10  *
  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.
  15  *
  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 GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public
  22  * License along with this program; if not, write to the
  23  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24  * Boston, MA 02111-1307, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * vout_yuv_convert_t: YUV convertion function
  29  *****************************************************************************
  30  * This is the prototype common to all convertion functions. The type of p_pic
  31  * will change depending of the screen depth treated.
  32  * Parameters:
  33  *      p_vout                          video output thread
  34  *      p_pic                           picture address
  35  *      p_y, p_u, p_v                   Y,U,V samples addresses
  36  *      i_width, i_height               Y samples extension
  37  *      i_pic_width, i_pic_height       picture extension
  38  *      i_pic_line_width                picture total line width
  39  *      i_matrix_coefficients           matrix coefficients
  40  * Picture width and source dimensions must be multiples of 16.
  41  *****************************************************************************/
  42 typedef void (vout_yuv_convert_t)( p_vout_thread_t p_vout, void *p_pic,
  43                                    yuv_data_t *p_y, yuv_data_t *p_u, yuv_data_t *p_v,
  44                                    int i_width, int i_height,
  45                                    int i_pic_width, int i_pic_height, int i_pic_line_width,
  46                                    int i_matrix_coefficients );
  47
  48 /*****************************************************************************
  49  * vout_yuv_t: pre-calculated YUV convertion tables
  50  *****************************************************************************
  51  * These tables are used by convertion and scaling functions.
  52  *****************************************************************************/
  53 typedef struct vout_yuv_s
  54 {
  55     /* Convertion functions */
  56     vout_yuv_convert_t *        p_Convert420;         /* YUV 4:2:0 converter */
  57     vout_yuv_convert_t *        p_Convert422;         /* YUV 4:2:2 converter */
  58     vout_yuv_convert_t *        p_Convert444;         /* YUV 4:4:4 converter */
  59
  60     /* Pre-calculated convertion tables */
  61     void *              p_base;            /* base for all conversion tables */
  62     union
  63     {
  64         u8 *            p_gray8;                        /* gray 8 bits table */
  65         u16 *           p_gray16;                      /* gray 16 bits table */
  66         u32 *           p_gray32;                      /* gray 32 bits table */
  67         u8 *            p_rgb8;                          /* RGB 8 bits table */
  68         u16 *           p_rgb16;                        /* RGB 16 bits table */
  69         u32 *           p_rgb32;                        /* RGB 32 bits table */
  70     } yuv;
  71
  72     /* Temporary convertion buffer and offset array */
  73     void *              p_buffer;                       /* convertion buffer */
  74     int *               p_offset;                            /* offset array */
  75 } vout_yuv_t;
  76
  77 /*****************************************************************************
  78  * vout_buffer_t: rendering buffer
  79  *****************************************************************************
  80  * This structure store informations about a buffer. Buffers are not completely
  81  * cleared between displays, and modified areas need to be stored.
  82  *****************************************************************************/
  83 typedef struct vout_buffer_s
  84 {
  85     /* Picture area */
  86     int         i_pic_x, i_pic_y;                       /* picture position  */
  87     int         i_pic_width, i_pic_height;              /* picture extension */
  88
  89     /* Other areas - only vertical extensions of areas are stored */
  90     int         i_areas;                                  /* number of areas */
  91     int         pi_area_begin[VOUT_MAX_AREAS];          /* beginning of area */
  92     int         pi_area_end[VOUT_MAX_AREAS];                  /* end of area */
  93
  94     /* Picture data */
  95     byte_t *    p_data;                                    /* memory address */
  96 } vout_buffer_t;
  97
  98 /*****************************************************************************
  99  * vout_thread_t: video output thread descriptor
 100  *****************************************************************************
 101  * Any independant video output device, such as an X11 window or a GGI device,
 102  * is represented by a video output thread, and described using the following
 103  * structure.
 104  *****************************************************************************/
 105 typedef int  (vout_sys_create_t)    ( p_vout_thread_t p_vout,
 106                                       char *psz_display, int i_root_window );
 107 typedef int  (vout_sys_init_t)      ( p_vout_thread_t p_vout );
 108 typedef void (vout_sys_end_t)       ( p_vout_thread_t p_vout );
 109 typedef void (vout_sys_destroy_t)   ( p_vout_thread_t p_vout );
 110 typedef int  (vout_sys_manage_t)    ( p_vout_thread_t p_vout );
 111 typedef void (vout_sys_display_t)   ( p_vout_thread_t p_vout );
 112 typedef void (vout_set_palette_t)   ( p_vout_thread_t p_vout, u16 *red,
 113                                       u16 *green, u16 *blue, u16 *transp );
 114
 115 typedef struct vout_thread_s
 116 {
 117     /* Thread properties and lock */
 118     boolean_t           b_die;                                 /* `die' flag */
 119     boolean_t           b_error;                             /* `error' flag */
 120     boolean_t           b_active;                           /* `active' flag */
 121     vlc_thread_t        thread_id;               /* id for pthread functions */
 122     vlc_mutex_t         picture_lock;                   /* picture heap lock */
 123     vlc_mutex_t         subpicture_lock;             /* subpicture heap lock */
 124     vlc_mutex_t         change_lock;                   /* thread change lock */
 125     int *               pi_status;                  /* temporary status flag */
 126     p_vout_sys_t        p_sys;                       /* system output method */
 127
 128     /* Current display properties */
 129     u16                 i_changes;             /* changes made to the thread */
 130     int                 i_width;              /* current output method width */
 131     int                 i_height;            /* current output method height */
 132     int                 i_bytes_per_line;  /* bytes per line (incl. virtual) */
 133     int                 i_screen_depth;  /* significant bpp: 8, 15, 16 or 24 */
 134     int                 i_bytes_per_pixel;/* real screen depth: 1, 2, 3 or 4 */
 135     float               f_gamma;                                    /* gamma */
 136
 137     /* Color masks and shifts in RGB mode - masks are set by system
 138      * initialization, shifts are calculated. A pixel color value can be
 139      * obtained using the formula ((value >> rshift) << lshift) */
 140     u32                 i_red_mask;                              /* red mask */
 141     u32                 i_green_mask;                          /* green mask */
 142     u32                 i_blue_mask;                            /* blue mask */
 143     int                 i_red_lshift, i_red_rshift;            /* red shifts */
 144     int                 i_green_lshift, i_green_rshift;      /* green shifts */
 145     int                 i_blue_lshift, i_blue_rshift;         /* blue shifts */
 146
 147     /* Useful pre-calculated pixel values - these are not supposed to be
 148      * accurate values, but rather values looking nice, given their usage. */
 149     u32                 i_white_pixel;                              /* white */
 150     u32                 i_black_pixel;                              /* black */
 151     u32                 i_gray_pixel;                                /* gray */
 152     u32                 i_blue_pixel;                                /* blue */
 153
 154     /* Plugins */
 155     void *                  p_vout_plugin;            /* video output plugin */
 156     vout_sys_create_t *     p_sys_create;          /* allocate output method */
 157     vout_sys_init_t *       p_sys_init;          /* initialize output method */
 158     vout_sys_end_t *        p_sys_end;            /* terminate output method */
 159     vout_sys_destroy_t *    p_sys_destroy;          /* destroy output method */
 160     vout_sys_manage_t *     p_sys_manage;                   /* handle events */
 161     vout_sys_display_t *    p_sys_display;         /* display rendered image */
 162     vout_set_palette_t *    p_set_palette;              /* sets 8bpp palette */
 163
 164     /* Pictures and rendering properties */
 165     boolean_t           b_grayscale;           /* color or grayscale display */
 166     boolean_t           b_info;            /* print additionnal informations */
 167     boolean_t           b_interface;                     /* render interface */
 168     boolean_t           b_scale;                    /* allow picture scaling */
 169
 170     /* Idle screens management */
 171     mtime_t             last_display_date;     /* last non idle display date */
 172     mtime_t             last_idle_date;            /* last idle display date */
 173
 174 #ifdef STATS
 175     /* Statistics - these numbers are not supposed to be accurate, but are a
 176      * good indication of the thread status */
 177     mtime_t             render_time;             /* last picture render time */
 178     count_t             c_fps_samples;                     /* picture counts */
 179     mtime_t             p_fps_sample[VOUT_FPS_SAMPLES]; /* FPS samples dates */
 180 #endif
 181
 182     /* Rendering buffers */
 183     int                 i_buffer_index;                      /* buffer index */
 184     vout_buffer_t       p_buffer[2];                   /* buffers properties */
 185
 186     /* Videos heap and translation tables */
 187     picture_t           p_picture[VOUT_MAX_PICTURES];            /* pictures */
 188     subpicture_t        p_subpicture[VOUT_MAX_PICTURES];      /* subpictures */
 189     int                 i_pictures;                     /* current heap size */
 190     vout_yuv_t          yuv;                           /* translation tables */
 191
 192     /* Bitmap fonts */
 193     p_vout_font_t       p_default_font;                      /* default font */
 194     p_vout_font_t       p_large_font;                          /* large font */
 195
 196     /* Synchronisation informations - synchro level is updated by the vout
 197      * thread and read by decoder threads */
 198     int                 i_synchro_level;                   /* trashing level */
 199 } vout_thread_t;
 200
 201 /* Flags for changes - these flags are set in the i_changes field when another
 202  * thread changed a variable */
 203 #define VOUT_INFO_CHANGE        0x0001                     /* b_info changed */
 204 #define VOUT_GRAYSCALE_CHANGE   0x0002                /* b_grayscale changed */
 205 #define VOUT_INTF_CHANGE        0x0004                /* b_interface changed */
 206 #define VOUT_SCALE_CHANGE       0x0008                    /* b_scale changed */
 207 #define VOUT_SIZE_CHANGE        0x0200                       /* size changed */
 208 #define VOUT_DEPTH_CHANGE       0x0400                      /* depth changed */
 209 #define VOUT_GAMMA_CHANGE       0x0010                      /* gamma changed */
 210 #define VOUT_YUV_CHANGE         0x0800                  /* change yuv tables */
 211 #define VOUT_NODISPLAY_CHANGE   0xff00    /* changes which forbidden display */
 212
 213 /*****************************************************************************
 214  * Macros
 215  *****************************************************************************/
 216
 217 /* RGB2PIXEL: assemble RGB components to a pixel value, returns a u32 */
 218 #define RGB2PIXEL( p_vout, i_red, i_green, i_blue )                           \
 219     (((((u32)i_red)   >> p_vout->i_red_rshift)   << p_vout->i_red_lshift)   | \
 220      ((((u32)i_green) >> p_vout->i_green_rshift) << p_vout->i_green_lshift) | \
 221      ((((u32)i_blue)  >> p_vout->i_blue_rshift)  << p_vout->i_blue_lshift))
 222
 223
 224 /*****************************************************************************
 225  * Prototypes
 226  *****************************************************************************/
 227 vout_thread_t * vout_CreateThread       ( char *psz_display, int i_root_window,
 228                                           int i_width, int i_height, int *pi_status, int i_method );
 229 void            vout_DestroyThread      ( vout_thread_t *p_vout, int *pi_status );
 230 picture_t *     vout_CreatePicture      ( vout_thread_t *p_vout, int i_type,
 231                                           int i_width, int i_height );
 232 void            vout_DestroyPicture     ( vout_thread_t *p_vout, picture_t *p_pic );
 233 void            vout_DisplayPicture     ( vout_thread_t *p_vout, picture_t *p_pic );
 234 void            vout_DatePicture        ( vout_thread_t *p_vout, picture_t *p_pic, mtime_t date );
 235 void            vout_LinkPicture        ( vout_thread_t *p_vout, picture_t *p_pic );
 236 void            vout_UnlinkPicture      ( vout_thread_t *p_vout, picture_t *p_pic );
 237 subpicture_t *  vout_CreateSubPicture   ( vout_thread_t *p_vout, int i_type, int i_size );
 238 void            vout_DestroySubPicture  ( vout_thread_t *p_vout, subpicture_t *p_subpic );
 239 void            vout_DisplaySubPicture  ( vout_thread_t *p_vout, subpicture_t *p_subpic );
 240
 241 void            vout_SetBuffers         ( vout_thread_t *p_vout, void *p_buf1, void *p_buf2 );
 242