git.sesse.net Git - vlc/blob - modules/video_output/mga.c

   1 /*****************************************************************************
   2  * mga.c : Matrox Graphic Array plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
   8  *          Samuel Hocevar <sam@zoy.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <unistd.h>                                               /* close() */
  30 #include <fcntl.h>                                                 /* open() */
  31 #include <sys/ioctl.h>                                            /* ioctl() */
  32 #include <sys/mman.h>                                          /* PROT_WRITE */
  33
  34 #ifdef HAVE_CONFIG_H
  35 # include "config.h"
  36 #endif
  37
  38 #include <vlc_common.h>
  39 #include <vlc_plugin.h>
  40 #include <vlc_vout.h>
  41 #include <vlc_charset.h>
  42
  43 #ifdef SYS_BSD
  44 #include <sys/types.h>                                     /* typedef ushort */
  45 #endif
  46
  47 /*****************************************************************************
  48  * Local prototypes
  49  *****************************************************************************/
  50 static int  Create    ( vlc_object_t * );
  51 static void Destroy   ( vlc_object_t * );
  52
  53 static int  Init      ( vout_thread_t * );
  54 static void End       ( vout_thread_t * );
  55 static void Display   ( vout_thread_t *, picture_t * );
  56
  57 static int  NewPicture     ( vout_thread_t *, picture_t * );
  58
  59 /*****************************************************************************
  60  * Module descriptor
  61  *****************************************************************************/
  62 vlc_module_begin ()
  63     set_description( N_("Matrox Graphic Array video output") )
  64     set_capability( "video output", 10 )
  65     set_callbacks( Create, Destroy )
  66 vlc_module_end ()
  67
  68 /*****************************************************************************
  69  * vout_sys_t: video output MGA method descriptor
  70  *****************************************************************************
  71  * This structure is part of the video output thread descriptor.
  72  * It describes the MGA specific properties of an output thread.
  73  *****************************************************************************/
  74 #ifndef __LINUX_MGAVID_H
  75 #   define __LINUX_MGAVID_H
  76
  77 #   define MGA_VID_CONFIG _IOR('J', 1, mga_vid_config_t)
  78 #   define MGA_VID_ON     _IO ('J', 2)
  79 #   define MGA_VID_OFF    _IO ('J', 3)
  80 #   define MGA_VID_FSEL   _IOR('J', 4, int)
  81 #   define MGA_G200 0x1234
  82 #   define MGA_G400 0x5678
  83
  84 #   define MGA_VID_FORMAT_YV12 0x32315659
  85 #   define MGA_VID_FORMAT_IYUV (('I'<<24)|('Y'<<16)|('U'<<8)|'V')
  86 #   define MGA_VID_FORMAT_I420 (('I'<<24)|('4'<<16)|('2'<<8)|'0')
  87 #   define MGA_VID_FORMAT_YUY2 (('Y'<<24)|('U'<<16)|('Y'<<8)|'2')
  88 #   define MGA_VID_FORMAT_UYVY (('U'<<24)|('Y'<<16)|('V'<<8)|'Y')
  89
  90 #   define MGA_VID_VERSION     0x0201
  91
  92 #   define MGA_NUM_FRAMES      1
  93
  94 typedef struct mga_vid_config_t
  95 {
  96     uint16_t version;
  97     uint16_t card_type;
  98     uint32_t ram_size;
  99     uint32_t src_width;
 100     uint32_t src_height;
 101     uint32_t dest_width;
 102     uint32_t dest_height;
 103     uint32_t x_org;
 104     uint32_t y_org;
 105     uint8_t  colkey_on;
 106     uint8_t  colkey_red;
 107     uint8_t  colkey_green;
 108     uint8_t  colkey_blue;
 109     uint32_t format;
 110     uint32_t frame_size;
 111     uint32_t num_frames;
 112 } mga_vid_config_t;
 113 #endif
 114
 115 struct vout_sys_t
 116 {
 117     mga_vid_config_t    mga;
 118     int                 i_fd;
 119     uint8_t *           p_video;
 120 };
 121
 122 struct picture_sys_t
 123 {
 124     int     i_frame;
 125 };
 126
 127 #define CEIL32(x) (((x)+31)&~31)
 128
 129 /*****************************************************************************
 130  * Create: allocates dummy video thread output method
 131  *****************************************************************************
 132  * This function allocates and initializes a dummy vout method.
 133  *****************************************************************************/
 134 static int Create( vlc_object_t *p_this )
 135 {
 136     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 137
 138     /* Allocate structure */
 139     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 140     if( p_vout->p_sys == NULL )
 141         return( 1 );
 142
 143     p_vout->p_sys->i_fd = utf8_open( "/dev/mga_vid", O_RDWR );
 144     if( p_vout->p_sys->i_fd == -1 )
 145     {
 146         msg_Err( p_vout, "cannot open MGA driver /dev/mga_vid" );
 147         free( p_vout->p_sys );
 148         return( 1 );
 149     }
 150
 151     p_vout->pf_init = Init;
 152     p_vout->pf_end = End;
 153     p_vout->pf_manage = NULL;
 154     p_vout->pf_render = NULL;
 155     p_vout->pf_display = Display;
 156
 157     return( 0 );
 158 }
 159
 160 /*****************************************************************************
 161  * Init: initialize dummy video thread output method
 162  *****************************************************************************/
 163 static int Init( vout_thread_t *p_vout )
 164 {
 165     int i_index;
 166     picture_t *p_pic;
 167
 168     I_OUTPUTPICTURES = 0;
 169
 170     /* create the MGA output */
 171     p_vout->output.i_width = p_vout->render.i_width;
 172     p_vout->output.i_height = p_vout->render.i_height;
 173     p_vout->output.i_aspect = p_vout->render.i_aspect;
 174
 175     /* Set coordinates and aspect ratio */
 176     p_vout->p_sys->mga.src_width = CEIL32(p_vout->output.i_width);
 177     p_vout->p_sys->mga.src_height = p_vout->output.i_height;
 178     vout_PlacePicture( p_vout, 1024, 768,
 179                        &p_vout->p_sys->mga.x_org, &p_vout->p_sys->mga.y_org,
 180                        &p_vout->p_sys->mga.dest_width,
 181                        &p_vout->p_sys->mga.dest_height );
 182
 183     /* Initialize a video buffer */
 184     p_vout->p_sys->mga.colkey_on = 0;
 185     p_vout->p_sys->mga.num_frames = MGA_NUM_FRAMES;
 186     p_vout->p_sys->mga.frame_size = CEIL32(p_vout->output.i_width)
 187                                      * p_vout->output.i_height * 2;
 188     p_vout->p_sys->mga.version = MGA_VID_VERSION;
 189
 190     /* Assume we only do YMGA for the moment. XXX: mga_vid calls this
 191      * YV12, but it's actually some strange format with packed UV. */
 192     p_vout->output.i_chroma = VLC_CODEC_YMGA;
 193     p_vout->p_sys->mga.format = MGA_VID_FORMAT_YV12;
 194
 195     if( ioctl(p_vout->p_sys->i_fd, MGA_VID_CONFIG, &p_vout->p_sys->mga) )
 196     {
 197         msg_Err( p_vout, "MGA config ioctl failed" );
 198         return -1;
 199     }
 200
 201     if( p_vout->p_sys->mga.card_type == MGA_G200 )
 202     {
 203         msg_Dbg( p_vout, "detected MGA G200 (%d MB Ram)",
 204                          p_vout->p_sys->mga.ram_size );
 205     }
 206     else
 207     {
 208         msg_Dbg( p_vout, "detected MGA G400/G450 (%d MB Ram)",
 209                          p_vout->p_sys->mga.ram_size );
 210     }
 211
 212     p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->mga.frame_size
 213                                        * MGA_NUM_FRAMES,
 214                                    PROT_WRITE, MAP_SHARED,
 215                                    p_vout->p_sys->i_fd, 0 );
 216
 217     /* Try to initialize up to MGA_NUM_FRAMES direct buffers */
 218     while( I_OUTPUTPICTURES < MGA_NUM_FRAMES )
 219     {
 220         p_pic = NULL;
 221
 222         /* Find an empty picture slot */
 223         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 224         {
 225             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 226             {
 227                 p_pic = p_vout->p_picture + i_index;
 228                 break;
 229             }
 230         }
 231
 232         /* Allocate the picture */
 233         if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 234         {
 235             break;
 236         }
 237
 238         p_pic->i_status = DESTROYED_PICTURE;
 239         p_pic->i_type   = DIRECT_PICTURE;
 240
 241         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 242
 243         I_OUTPUTPICTURES++;
 244     }
 245
 246     /* Blank the windows */
 247     for( i_index = 0; i_index < I_OUTPUTPICTURES; i_index++ )
 248     {
 249         memset( p_vout->p_sys->p_video
 250                  + p_vout->p_sys->mga.frame_size * i_index,
 251                 0x00, p_vout->p_sys->mga.frame_size / 2 );
 252         memset( p_vout->p_sys->p_video
 253                  + p_vout->p_sys->mga.frame_size * ( 2*i_index + 1 ) / 2,
 254                 0x80, p_vout->p_sys->mga.frame_size / 2 );
 255     }
 256
 257     /* Display the image */
 258     ioctl( p_vout->p_sys->i_fd, MGA_VID_ON, 0 );
 259
 260     return( 0 );
 261 }
 262
 263 /*****************************************************************************
 264  * End: terminate dummy video thread output method
 265  *****************************************************************************/
 266 static void End( vout_thread_t *p_vout )
 267 {
 268     int i_index;
 269
 270     ioctl( p_vout->p_sys->i_fd, MGA_VID_OFF, 0 );
 271
 272     /* Free the output buffers we allocated */
 273     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 274     {
 275         i_index--;
 276     }
 277 }
 278
 279 /*****************************************************************************
 280  * Destroy: destroy dummy video thread output method
 281  *****************************************************************************
 282  * Terminate an output method created by DummyCreateOutputMethod
 283  *****************************************************************************/
 284 static void Destroy( vlc_object_t *p_this )
 285 {
 286     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 287     close( p_vout->p_sys->i_fd );
 288     free( p_vout->p_sys );
 289 }
 290
 291 /*****************************************************************************
 292  * Display: displays previously rendered output
 293  *****************************************************************************/
 294 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 295 {
 296     ioctl( p_vout->p_sys->i_fd, MGA_VID_FSEL, &p_pic->p_sys->i_frame );
 297 }
 298
 299 /* Following functions are local */
 300
 301 /*****************************************************************************
 302  * NewPicture: allocate a picture
 303  *****************************************************************************
 304  * Returns 0 on success, -1 otherwise
 305  *****************************************************************************/
 306 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 307 {
 308     /* We know the chroma, allocate a buffer which will be used
 309      * directly by the decoder */
 310     p_pic->p_data = p_vout->p_sys->p_video + I_OUTPUTPICTURES
 311                                               * p_vout->p_sys->mga.frame_size;
 312
 313     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 314
 315     if( p_pic->p_sys == NULL )
 316     {
 317         return -1;
 318     }
 319
 320     p_pic->Y_PIXELS = p_pic->p_data;
 321     p_pic->p[Y_PLANE].i_lines = p_vout->output.i_height;
 322     p_pic->p[Y_PLANE].i_visible_lines = p_vout->output.i_height;
 323     p_pic->p[Y_PLANE].i_pitch = CEIL32( p_vout->output.i_width );
 324     p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 325     p_pic->p[Y_PLANE].i_visible_pitch = p_vout->output.i_width;
 326
 327     p_pic->U_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 2/4;
 328     p_pic->p[U_PLANE].i_lines = p_vout->output.i_height / 2;
 329     p_pic->p[U_PLANE].i_visible_lines = p_vout->output.i_height / 2;
 330     p_pic->p[U_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;
 331     p_pic->p[U_PLANE].i_pixel_pitch = 1;
 332     p_pic->p[U_PLANE].i_visible_pitch = p_pic->p[U_PLANE].i_pitch;
 333
 334     p_pic->V_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 3/4;
 335     p_pic->p[V_PLANE].i_lines = p_vout->output.i_height / 2;
 336     p_pic->p[V_PLANE].i_visible_lines = p_vout->output.i_height / 2;
 337     p_pic->p[V_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;
 338     p_pic->p[V_PLANE].i_pixel_pitch = 1;
 339     p_pic->p[V_PLANE].i_visible_pitch = p_pic->p[V_PLANE].i_pitch;
 340
 341     p_pic->p_sys->i_frame = I_OUTPUTPICTURES;
 342
 343     p_pic->i_planes = 3;
 344
 345     return 0;
 346 }
 347