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: Vincent Seguin <seguin@via.ecp.fr>
  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
  19  * GNU General Public License for more details.
  20  *
  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  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * vout_yuv_convert_t: YUV conversion function
  28  *****************************************************************************
  29  * This is the prototype common to all conversion functions. The type of p_pic
  30  * will change depending on the processed screen depth.
  31  * Parameters:
  32  *      p_vout                          video output thread
  33  *      p_pic                           picture address
  34  *      p_y, p_u, p_v                   Y,U,V samples addresses
  35  *      i_width, i_height               Y samples extension
  36  *      i_pic_width, i_pic_height       picture extension
  37  *      i_pic_line_width                picture total line width
  38  *      i_matrix_coefficients           matrix coefficients
  39  * Picture width and source dimensions must be multiples of 16.
  40  *****************************************************************************/
  41 typedef void (vout_yuv_convert_t)( p_vout_thread_t p_vout, void *p_pic,
  42                                    yuv_data_t *p_y, yuv_data_t *p_u, yuv_data_t *p_v,
  43                                    int i_width, int i_height,
  44                                    int i_pic_width, int i_pic_height, int i_pic_line_width,
  45                                    int i_matrix_coefficients );
  46
  47 /*****************************************************************************
  48  * vout_yuv_t: pre-calculated YUV conversion tables
  49  *****************************************************************************
  50  * These tables are used by conversion and scaling functions.
  51  *****************************************************************************/
  52 typedef int  (yuv_init_t)           ( p_vout_thread_t p_vout );
  53 typedef int  (yuv_reset_t)          ( p_vout_thread_t p_vout );
  54 typedef void (yuv_end_t)            ( p_vout_thread_t p_vout );
  55
  56 typedef struct vout_yuv_s
  57 {
  58     /* conversion functions */
  59     vout_yuv_convert_t *pf_yuv420;                    /* YUV 4:2:0 converter */
  60     vout_yuv_convert_t *pf_yuv422;                    /* YUV 4:2:2 converter */
  61     vout_yuv_convert_t *pf_yuv444;                    /* YUV 4:4:4 converter */
  62
  63     /* Pre-calculated conversion tables */
  64     void *              p_base;            /* base for all conversion tables */
  65     union
  66     {
  67         u8 *            p_gray8;                        /* gray 8 bits table */
  68         u16 *           p_gray16;                      /* gray 16 bits table */
  69         u32 *           p_gray32;                      /* gray 32 bits table */
  70         u8 *            p_rgb8;                          /* RGB 8 bits table */
  71         u16 *           p_rgb16;                        /* RGB 16 bits table */
  72         u32 *           p_rgb32;                        /* RGB 32 bits table */
  73     } yuv;
  74
  75     /* Temporary conversion buffer and offset array */
  76     void *              p_buffer;                       /* conversion buffer */
  77     int *               p_offset;                            /* offset array */
  78
  79     /* Plugin used and shortcuts to access its capabilities */
  80     struct module_s *   p_module;
  81     yuv_init_t *        pf_init;                    /* initialize YUV tables */
  82     yuv_reset_t *       pf_reset;                        /* reset YUV tables */
  83     yuv_end_t *         pf_end;                           /* free YUV tables */
  84
  85 } vout_yuv_t;
  86
  87 /*****************************************************************************
  88  * vout_buffer_t: rendering buffer
  89  *****************************************************************************
  90  * This structure stores information about a buffer. Buffers are not completely
  91  * cleared between displays, and modified areas need to be stored.
  92  *****************************************************************************/
  93 typedef struct vout_buffer_s
  94 {
  95     /* Picture area */
  96     int         i_pic_x, i_pic_y;                       /* picture position  */
  97     int         i_pic_width, i_pic_height;                   /* picture size */
  98
  99     /* Other areas - only vertical extensions of areas are stored */
 100     int         i_areas;                                  /* number of areas */
 101     int         pi_area_begin[VOUT_MAX_AREAS];          /* beginning of area */
 102     int         pi_area_end[VOUT_MAX_AREAS];                  /* end of area */
 103
 104     /* Picture data */
 105     byte_t *    p_data;                                    /* memory address */
 106 } vout_buffer_t;
 107
 108 /*****************************************************************************
 109  * vout_thread_t: video output thread descriptor
 110  *****************************************************************************
 111  * Any independant video output device, such as an X11 window or a GGI device,
 112  * is represented by a video output thread, and described using the following
 113  * structure.
 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     boolean_t           b_need_render;  /* does the output method need a YUV
 137                                          * conversion ?                      */
 138
 139     /* Color masks and shifts in RGB mode - masks are set by system
 140      * initialization, shifts are calculated. A pixel color value can be
 141      * obtained using the formula ((value >> rshift) << lshift) */
 142     u32                 i_red_mask;                              /* red mask */
 143     u32                 i_green_mask;                          /* green mask */
 144     u32                 i_blue_mask;                            /* blue mask */
 145     int                 i_red_lshift, i_red_rshift;            /* red shifts */
 146     int                 i_green_lshift, i_green_rshift;      /* green shifts */
 147     int                 i_blue_lshift, i_blue_rshift;         /* blue shifts */
 148
 149     /* Useful pre-calculated pixel values - these are not supposed to be
 150      * accurate values, but rather values looking nice, given their usage. */
 151     u32                 i_white_pixel;                              /* white */
 152     u32                 i_black_pixel;                              /* black */
 153     u32                 i_gray_pixel;                                /* gray */
 154     u32                 i_blue_pixel;                                /* blue */
 155
 156     /* Plugin used and shortcuts to access its capabilities */
 157     struct module_s *   p_module;
 158     int              ( *pf_create )     ( struct vout_thread_s * );
 159     int              ( *pf_init )       ( struct vout_thread_s * );
 160     void             ( *pf_end )        ( struct vout_thread_s * );
 161     void             ( *pf_destroy )    ( struct vout_thread_s * );
 162     int              ( *pf_manage )     ( struct vout_thread_s * );
 163     void             ( *pf_display )    ( struct vout_thread_s * );
 164     void             ( *pf_setpalette ) ( struct vout_thread_s *, u16 *red,
 165                                           u16 *green, u16 *blue, u16 *transp );
 166
 167     /* Pictures and rendering properties */
 168     boolean_t           b_grayscale;           /* color or grayscale display */
 169     boolean_t           b_YCbr;            /* use YUV to YCbr instead of RGB */
 170     boolean_t           b_info;              /* print additional information */
 171     boolean_t           b_interface;                     /* render interface */
 172     boolean_t           b_scale;                    /* allow picture scaling */
 173     mtime_t             render_time;             /* last picture render time */
 174
 175
 176     /* Idle screens management */
 177     mtime_t             last_display_date;     /* last non idle display date */
 178     mtime_t             last_idle_date;            /* last idle display date */
 179     mtime_t             init_display_date;
 180
 181     /* Statistics - these numbers are not supposed to be accurate, but are a
 182      * good indication of the thread status */
 183     count_t             c_fps_samples;                     /* picture counts */
 184     mtime_t             p_fps_sample[VOUT_FPS_SAMPLES]; /* FPS samples dates */
 185
 186     /* Rendering buffers */
 187     int                 i_buffer_index;                      /* buffer index */
 188     vout_buffer_t       p_buffer[2];                   /* buffers properties */
 189
 190     /* Video heap and translation tables */
 191     picture_t           p_picture[VOUT_MAX_PICTURES];            /* pictures */
 192     subpicture_t        p_subpicture[VOUT_MAX_PICTURES];      /* subpictures */
 193     int                 i_pictures;                     /* current heap size */
 194     vout_yuv_t          yuv;                           /* translation tables */
 195     picture_t *         p_rendered_pic;  /* picture currently being rendered */
 196
 197     /* Bitmap fonts */
 198     p_vout_font_t       p_default_font;                      /* default font */
 199     p_vout_font_t       p_large_font;                          /* large font */
 200
 201 #ifdef STATS
 202     count_t             c_loops;
 203 #endif
 204 } vout_thread_t;
 205
 206 /* Flags for changes - these flags are set in the i_changes field when another
 207  * thread changed a variable */
 208 #define VOUT_INFO_CHANGE        0x0001                     /* b_info changed */
 209 #define VOUT_GRAYSCALE_CHANGE   0x0002                /* b_grayscale changed */
 210 #define VOUT_INTF_CHANGE        0x0004                /* b_interface changed */
 211 #define VOUT_SCALE_CHANGE       0x0008                    /* b_scale changed */
 212 #define VOUT_GAMMA_CHANGE       0x0010                      /* gamma changed */
 213 #define VOUT_CURSOR_CHANGE      0x0020                   /* b_cursor changed */
 214 #define VOUT_FULLSCREEN_CHANGE  0x0040               /* b_fullscreen changed */
 215 #define VOUT_SIZE_CHANGE        0x0200                       /* size changed */
 216 #define VOUT_DEPTH_CHANGE       0x0400                      /* depth changed */
 217 #define VOUT_YUV_CHANGE         0x0800                  /* change yuv tables */
 218
 219 /* Disabled for thread deadlocks issues --Meuuh */
 220 //#define VOUT_NODISPLAY_CHANGE   0xff00    /* changes which forbidden display */
 221
 222 /*****************************************************************************
 223  * Macros
 224  *****************************************************************************/
 225
 226 /* RGB2PIXEL: assemble RGB components to a pixel value, returns a u32 */
 227 #define RGB2PIXEL( p_vout, i_red, i_green, i_blue )                           \
 228     (((((u32)i_red)   >> p_vout->i_red_rshift)   << p_vout->i_red_lshift)   | \
 229      ((((u32)i_green) >> p_vout->i_green_rshift) << p_vout->i_green_lshift) | \
 230      ((((u32)i_blue)  >> p_vout->i_blue_rshift)  << p_vout->i_blue_lshift))
 231
 232
 233 /*****************************************************************************
 234  * Prototypes
 235  *****************************************************************************/
 236 vout_thread_t * vout_CreateThread   ( int *pi_status );
 237 void            vout_DestroyThread  ( vout_thread_t *p_vout, int *pi_status );
 238 picture_t *     vout_CreatePicture  ( vout_thread_t *p_vout, int i_type,
 239                                       int i_width, int i_height );
 240 void            vout_DestroyPicture ( vout_thread_t *p_vout, picture_t *p_pic );
 241 void            vout_DisplayPicture ( vout_thread_t *p_vout, picture_t *p_pic );
 242 void            vout_DatePicture    ( vout_thread_t *p_vout, picture_t *p_pic, mtime_t date );
 243 void            vout_LinkPicture    ( vout_thread_t *p_vout, picture_t *p_pic );
 244 void            vout_UnlinkPicture  ( vout_thread_t *p_vout, picture_t *p_pic );
 245
 246 subpicture_t *  vout_CreateSubPicture   ( vout_thread_t *p_vout, int i_type, int i_size );
 247 void            vout_DestroySubPicture  ( vout_thread_t *p_vout, subpicture_t *p_subpic );
 248 void            vout_DisplaySubPicture  ( vout_thread_t *p_vout, subpicture_t *p_subpic );
 249
 250 void            vout_SetBuffers         ( vout_thread_t *p_vout, void *p_buf1, void *p_buf2 );
 251