1 /*****************************************************************************
2 * mga.c : Matrox Graphic Array plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 the VideoLAN team
7 * Authors: Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
8 * Samuel Hocevar <sam@zoy.org>
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.
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.
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 *****************************************************************************/
25 /*****************************************************************************
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 */
42 #include <sys/types.h> /* typedef ushort */
45 /*****************************************************************************
47 *****************************************************************************/
48 static int Create ( vlc_object_t * );
49 static void Destroy ( vlc_object_t * );
51 static int Init ( vout_thread_t * );
52 static void End ( vout_thread_t * );
53 static void Display ( vout_thread_t *, picture_t * );
55 static int NewPicture ( vout_thread_t *, picture_t * );
57 /*****************************************************************************
59 *****************************************************************************/
61 set_description( _("Matrox Graphic Array video output") );
62 set_capability( "video output", 10 );
63 set_callbacks( Create, Destroy );
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
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
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')
88 # define MGA_VID_VERSION 0x0201
90 # define MGA_NUM_FRAMES 1
92 typedef struct mga_vid_config_t
100 uint32_t dest_height;
105 uint8_t colkey_green;
115 mga_vid_config_t mga;
125 #define CEIL32(x) (((x)+31)&~31)
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 )
134 vout_thread_t *p_vout = (vout_thread_t *)p_this;
136 /* Allocate structure */
137 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
138 if( p_vout->p_sys == NULL )
140 msg_Err( p_vout, "out of memory" );
144 p_vout->p_sys->i_fd = open( "/dev/mga_vid", O_RDWR );
145 if( p_vout->p_sys->i_fd == -1 )
147 msg_Err( p_vout, "cannot open MGA driver /dev/mga_vid" );
148 free( p_vout->p_sys );
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;
161 /*****************************************************************************
162 * Init: initialize dummy video thread output method
163 *****************************************************************************/
164 static int Init( vout_thread_t *p_vout )
169 I_OUTPUTPICTURES = 0;
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;
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 );
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;
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;
196 if( ioctl(p_vout->p_sys->i_fd, MGA_VID_CONFIG, &p_vout->p_sys->mga) )
198 msg_Err( p_vout, "MGA config ioctl failed" );
202 if( p_vout->p_sys->mga.card_type == MGA_G200 )
204 msg_Dbg( p_vout, "detected MGA G200 (%d MB Ram)",
205 p_vout->p_sys->mga.ram_size );
209 msg_Dbg( p_vout, "detected MGA G400/G450 (%d MB Ram)",
210 p_vout->p_sys->mga.ram_size );
213 p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->mga.frame_size
215 PROT_WRITE, MAP_SHARED,
216 p_vout->p_sys->i_fd, 0 );
218 /* Try to initialize up to MGA_NUM_FRAMES direct buffers */
219 while( I_OUTPUTPICTURES < MGA_NUM_FRAMES )
223 /* Find an empty picture slot */
224 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
226 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
228 p_pic = p_vout->p_picture + i_index;
233 /* Allocate the picture */
234 if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
239 p_pic->i_status = DESTROYED_PICTURE;
240 p_pic->i_type = DIRECT_PICTURE;
242 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
247 /* Blank the windows */
248 for( i_index = 0; i_index < I_OUTPUTPICTURES; i_index++ )
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 );
258 /* Display the image */
259 ioctl( p_vout->p_sys->i_fd, MGA_VID_ON, 0 );
264 /*****************************************************************************
265 * End: terminate dummy video thread output method
266 *****************************************************************************/
267 static void End( vout_thread_t *p_vout )
271 ioctl( p_vout->p_sys->i_fd, MGA_VID_OFF, 0 );
273 /* Free the output buffers we allocated */
274 for( i_index = I_OUTPUTPICTURES ; i_index ; )
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 )
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 );
292 /*****************************************************************************
293 * Display: displays previously rendered output
294 *****************************************************************************/
295 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
297 ioctl( p_vout->p_sys->i_fd, MGA_VID_FSEL, &p_pic->p_sys->i_frame );
300 /* Following functions are local */
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 )
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;
314 p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
316 if( p_pic->p_sys == NULL )
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;
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;
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;
342 p_pic->p_sys->i_frame = I_OUTPUTPICTURES;