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/vlc.h>
  39 #include <vlc_vout.h>
  40
  41 #ifdef SYS_BSD
  42 #include <sys/types.h>                                     /* typedef ushort */
  43 #endif
  44
  45 /*****************************************************************************
  46  * Local prototypes
  47  *****************************************************************************/
  48 static int  Create    ( vlc_object_t * );
  49 static void Destroy   ( vlc_object_t * );
  50
  51 static int  Init      ( vout_thread_t * );
  52 static void End       ( vout_thread_t * );
  53 static void Display   ( vout_thread_t *, picture_t * );
  54
  55 static int  NewPicture     ( vout_thread_t *, picture_t * );
  56
  57 /*****************************************************************************
  58  * Module descriptor
  59  *****************************************************************************/
  60 vlc_module_begin();
  61     set_description( _("Matrox Graphic Array video output") );
  62     set_capability( "video output", 10 );
  63     set_callbacks( Create, Destroy );
  64 vlc_module_end();
  65
  66 /*****************************************************************************
  67  * vout_sys_t: video output MGA method descriptor
  68  *****************************************************************************
  69  * This structure is part of the video output thread descriptor.
  70  * It describes the MGA specific properties of an output thread.
  71  *****************************************************************************/
  72 #ifndef __LINUX_MGAVID_H
  73 #   define __LINUX_MGAVID_H
  74
  75 #   define MGA_VID_CONFIG _IOR('J', 1, mga_vid_config_t)
  76 #   define MGA_VID_ON     _IO ('J', 2)
  77 #   define MGA_VID_OFF    _IO ('J', 3)
  78 #   define MGA_VID_FSEL   _IOR('J', 4, int)
  79 #   define MGA_G200 0x1234
  80 #   define MGA_G400 0x5678
  81
  82 #   define MGA_VID_FORMAT_YV12 0x32315659
  83 #   define MGA_VID_FORMAT_IYUV (('I'<<24)|('Y'<<16)|('U'<<8)|'V')
  84 #   define MGA_VID_FORMAT_I420 (('I'<<24)|('4'<<16)|('2'<<8)|'0')
  85 #   define MGA_VID_FORMAT_YUY2 (('Y'<<24)|('U'<<16)|('Y'<<8)|'2')
  86 #   define MGA_VID_FORMAT_UYVY (('U'<<24)|('Y'<<16)|('V'<<8)|'Y')
  87
  88 #   define MGA_VID_VERSION     0x0201
  89
  90 #   define MGA_NUM_FRAMES      1
  91
  92 typedef struct mga_vid_config_t
  93 {
  94     uint16_t version;
  95     uint16_t card_type;
  96     uint32_t ram_size;
  97     uint32_t src_width;
  98     uint32_t src_height;
  99     uint32_t dest_width;
 100     uint32_t dest_height;
 101     uint32_t x_org;
 102     uint32_t y_org;
 103     uint8_t  colkey_on;
 104     uint8_t  colkey_red;
 105     uint8_t  colkey_green;
 106     uint8_t  colkey_blue;
 107     uint32_t format;
 108     uint32_t frame_size;
 109     uint32_t num_frames;
 110 } mga_vid_config_t;
 111 #endif
 112
 113 struct vout_sys_t
 114 {
 115     mga_vid_config_t    mga;
 116     int                 i_fd;
 117     uint8_t *           p_video;
 118 };
 119
 120 struct picture_sys_t
 121 {
 122     int     i_frame;
 123 };
 124
 125 #define CEIL32(x) (((x)+31)&~31)
 126
 127 /*****************************************************************************
 128  * Create: allocates dummy video thread output method
 129  *****************************************************************************
 130  * This function allocates and initializes a dummy vout method.
 131  *****************************************************************************/
 132 static int Create( vlc_object_t *p_this )
 133 {
 134     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 135
 136     /* Allocate structure */
 137     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 138     if( p_vout->p_sys == NULL )
 139     {
 140         msg_Err( p_vout, "out of memory" );
 141         return( 1 );
 142     }
 143
 144     p_vout->p_sys->i_fd = open( "/dev/mga_vid", O_RDWR );
 145     if( p_vout->p_sys->i_fd == -1 )
 146     {
 147         msg_Err( p_vout, "cannot open MGA driver /dev/mga_vid" );
 148         free( p_vout->p_sys );
 149         return( 1 );
 150     }
 151
 152     p_vout->pf_init = Init;
 153     p_vout->pf_end = End;
 154     p_vout->pf_manage = NULL;
 155     p_vout->pf_render = NULL;
 156     p_vout->pf_display = Display;
 157
 158     return( 0 );
 159 }
 160
 161 /*****************************************************************************
 162  * Init: initialize dummy video thread output method
 163  *****************************************************************************/
 164 static int Init( vout_thread_t *p_vout )
 165 {
 166     int i_index;
 167     picture_t *p_pic;
 168
 169     I_OUTPUTPICTURES = 0;
 170
 171     /* create the MGA output */
 172     p_vout->output.i_width = p_vout->render.i_width;
 173     p_vout->output.i_height = p_vout->render.i_height;
 174     p_vout->output.i_aspect = p_vout->render.i_aspect;
 175
 176     /* Set coordinates and aspect ratio */
 177     p_vout->p_sys->mga.src_width = CEIL32(p_vout->output.i_width);
 178     p_vout->p_sys->mga.src_height = p_vout->output.i_height;
 179     vout_PlacePicture( p_vout, 1024, 768,
 180                        &p_vout->p_sys->mga.x_org, &p_vout->p_sys->mga.y_org,
 181                        &p_vout->p_sys->mga.dest_width,
 182                        &p_vout->p_sys->mga.dest_height );
 183
 184     /* Initialize a video buffer */
 185     p_vout->p_sys->mga.colkey_on = 0;
 186     p_vout->p_sys->mga.num_frames = MGA_NUM_FRAMES;
 187     p_vout->p_sys->mga.frame_size = CEIL32(p_vout->output.i_width)
 188                                      * p_vout->output.i_height * 2;
 189     p_vout->p_sys->mga.version = MGA_VID_VERSION;
 190
 191     /* Assume we only do YMGA for the moment. XXX: mga_vid calls this
 192      * YV12, but it's actually some strange format with packed UV. */
 193     p_vout->output.i_chroma = VLC_FOURCC('Y','M','G','A');
 194     p_vout->p_sys->mga.format = MGA_VID_FORMAT_YV12;
 195
 196     if( ioctl(p_vout->p_sys->i_fd, MGA_VID_CONFIG, &p_vout->p_sys->mga) )
 197     {
 198         msg_Err( p_vout, "MGA config ioctl failed" );
 199         return -1;
 200     }
 201
 202     if( p_vout->p_sys->mga.card_type == MGA_G200 )
 203     {
 204         msg_Dbg( p_vout, "detected MGA G200 (%d MB Ram)",
 205                          p_vout->p_sys->mga.ram_size );
 206     }
 207     else
 208     {
 209         msg_Dbg( p_vout, "detected MGA G400/G450 (%d MB Ram)",
 210                          p_vout->p_sys->mga.ram_size );
 211     }
 212
 213     p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->mga.frame_size
 214                                        * MGA_NUM_FRAMES,
 215                                    PROT_WRITE, MAP_SHARED,
 216                                    p_vout->p_sys->i_fd, 0 );
 217
 218     /* Try to initialize up to MGA_NUM_FRAMES direct buffers */
 219     while( I_OUTPUTPICTURES < MGA_NUM_FRAMES )
 220     {
 221         p_pic = NULL;
 222
 223         /* Find an empty picture slot */
 224         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 225         {
 226             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 227             {
 228                 p_pic = p_vout->p_picture + i_index;
 229                 break;
 230             }
 231         }
 232
 233         /* Allocate the picture */
 234         if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 235         {
 236             break;
 237         }
 238
 239         p_pic->i_status = DESTROYED_PICTURE;
 240         p_pic->i_type   = DIRECT_PICTURE;
 241
 242         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 243
 244         I_OUTPUTPICTURES++;
 245     }
 246
 247     /* Blank the windows */
 248     for( i_index = 0; i_index < I_OUTPUTPICTURES; i_index++ )
 249     {
 250         memset( p_vout->p_sys->p_video
 251                  + p_vout->p_sys->mga.frame_size * i_index,
 252                 0x00, p_vout->p_sys->mga.frame_size / 2 );
 253         memset( p_vout->p_sys->p_video
 254                  + p_vout->p_sys->mga.frame_size * ( 2*i_index + 1 ) / 2,
 255                 0x80, p_vout->p_sys->mga.frame_size / 2 );
 256     }
 257
 258     /* Display the image */
 259     ioctl( p_vout->p_sys->i_fd, MGA_VID_ON, 0 );
 260
 261     return( 0 );
 262 }
 263
 264 /*****************************************************************************
 265  * End: terminate dummy video thread output method
 266  *****************************************************************************/
 267 static void End( vout_thread_t *p_vout )
 268 {
 269     int i_index;
 270
 271     ioctl( p_vout->p_sys->i_fd, MGA_VID_OFF, 0 );
 272
 273     /* Free the output buffers we allocated */
 274     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 275     {
 276         i_index--;
 277     }
 278 }
 279
 280 /*****************************************************************************
 281  * Destroy: destroy dummy video thread output method
 282  *****************************************************************************
 283  * Terminate an output method created by DummyCreateOutputMethod
 284  *****************************************************************************/
 285 static void Destroy( vlc_object_t *p_this )
 286 {
 287     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 288     close( p_vout->p_sys->i_fd );
 289     free( p_vout->p_sys );
 290 }
 291
 292 /*****************************************************************************
 293  * Display: displays previously rendered output
 294  *****************************************************************************/
 295 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 296 {
 297     ioctl( p_vout->p_sys->i_fd, MGA_VID_FSEL, &p_pic->p_sys->i_frame );
 298 }
 299
 300 /* Following functions are local */
 301
 302 /*****************************************************************************
 303  * NewPicture: allocate a picture
 304  *****************************************************************************
 305  * Returns 0 on success, -1 otherwise
 306  *****************************************************************************/
 307 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 308 {
 309     /* We know the chroma, allocate a buffer which will be used
 310      * directly by the decoder */
 311     p_pic->p_data = p_vout->p_sys->p_video + I_OUTPUTPICTURES
 312                                               * p_vout->p_sys->mga.frame_size;
 313
 314     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 315
 316     if( p_pic->p_sys == NULL )
 317     {
 318         return -1;
 319     }
 320
 321     p_pic->Y_PIXELS = p_pic->p_data;
 322     p_pic->p[Y_PLANE].i_lines = p_vout->output.i_height;
 323     p_pic->p[Y_PLANE].i_visible_lines = p_vout->output.i_height;
 324     p_pic->p[Y_PLANE].i_pitch = CEIL32( p_vout->output.i_width );
 325     p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 326     p_pic->p[Y_PLANE].i_visible_pitch = p_vout->output.i_width;
 327
 328     p_pic->U_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 2/4;
 329     p_pic->p[U_PLANE].i_lines = p_vout->output.i_height / 2;
 330     p_pic->p[U_PLANE].i_visible_lines = p_vout->output.i_height / 2;
 331     p_pic->p[U_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;
 332     p_pic->p[U_PLANE].i_pixel_pitch = 1;
 333     p_pic->p[U_PLANE].i_visible_pitch = p_pic->p[U_PLANE].i_pitch;
 334
 335     p_pic->V_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 3/4;
 336     p_pic->p[V_PLANE].i_lines = p_vout->output.i_height / 2;
 337     p_pic->p[V_PLANE].i_visible_lines = p_vout->output.i_height / 2;
 338     p_pic->p[V_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;
 339     p_pic->p[V_PLANE].i_pixel_pitch = 1;
 340     p_pic->p[V_PLANE].i_visible_pitch = p_pic->p[V_PLANE].i_pitch;
 341
 342     p_pic->p_sys->i_frame = I_OUTPUTPICTURES;
 343
 344     p_pic->i_planes = 3;
 345
 346     return 0;
 347 }
 348