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