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