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 */
38 #include <sys/types.h> /* typedef ushort */
41 /*****************************************************************************
43 *****************************************************************************/
44 static int Create ( vlc_object_t * );
45 static void Destroy ( vlc_object_t * );
47 static int Init ( vout_thread_t * );
48 static void End ( vout_thread_t * );
49 static void Display ( vout_thread_t *, picture_t * );
51 static int NewPicture ( vout_thread_t *, picture_t * );
53 /*****************************************************************************
55 *****************************************************************************/
57 set_description( _("Matrox Graphic Array video output") );
58 set_capability( "video output", 10 );
59 set_callbacks( Create, Destroy );
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
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
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')
84 # define MGA_VID_VERSION 0x0201
86 # define MGA_NUM_FRAMES 1
88 typedef struct mga_vid_config_t
101 uint8_t colkey_green;
111 mga_vid_config_t mga;
121 #define CEIL32(x) (((x)+31)&~31)
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 )
130 vout_thread_t *p_vout = (vout_thread_t *)p_this;
132 /* Allocate structure */
133 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
134 if( p_vout->p_sys == NULL )
136 msg_Err( p_vout, "out of memory" );
140 p_vout->p_sys->i_fd = open( "/dev/mga_vid", O_RDWR );
141 if( p_vout->p_sys->i_fd == -1 )
143 msg_Err( p_vout, "cannot open MGA driver /dev/mga_vid" );
144 free( p_vout->p_sys );
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;
157 /*****************************************************************************
158 * Init: initialize dummy video thread output method
159 *****************************************************************************/
160 static int Init( vout_thread_t *p_vout )
165 I_OUTPUTPICTURES = 0;
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;
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 );
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;
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;
192 if( ioctl(p_vout->p_sys->i_fd, MGA_VID_CONFIG, &p_vout->p_sys->mga) )
194 msg_Err( p_vout, "MGA config ioctl failed" );
198 if( p_vout->p_sys->mga.card_type == MGA_G200 )
200 msg_Dbg( p_vout, "detected MGA G200 (%d MB Ram)",
201 p_vout->p_sys->mga.ram_size );
205 msg_Dbg( p_vout, "detected MGA G400/G450 (%d MB Ram)",
206 p_vout->p_sys->mga.ram_size );
209 p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->mga.frame_size
211 PROT_WRITE, MAP_SHARED,
212 p_vout->p_sys->i_fd, 0 );
214 /* Try to initialize up to MGA_NUM_FRAMES direct buffers */
215 while( I_OUTPUTPICTURES < MGA_NUM_FRAMES )
219 /* Find an empty picture slot */
220 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
222 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
224 p_pic = p_vout->p_picture + i_index;
229 /* Allocate the picture */
230 if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
235 p_pic->i_status = DESTROYED_PICTURE;
236 p_pic->i_type = DIRECT_PICTURE;
238 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
243 /* Blank the windows */
244 for( i_index = 0; i_index < I_OUTPUTPICTURES; i_index++ )
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 );
254 /* Display the image */
255 ioctl( p_vout->p_sys->i_fd, MGA_VID_ON, 0 );
260 /*****************************************************************************
261 * End: terminate dummy video thread output method
262 *****************************************************************************/
263 static void End( vout_thread_t *p_vout )
267 ioctl( p_vout->p_sys->i_fd, MGA_VID_OFF, 0 );
269 /* Free the output buffers we allocated */
270 for( i_index = I_OUTPUTPICTURES ; i_index ; )
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 )
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 );
288 /*****************************************************************************
289 * Display: displays previously rendered output
290 *****************************************************************************/
291 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
293 ioctl( p_vout->p_sys->i_fd, MGA_VID_FSEL, &p_pic->p_sys->i_frame );
296 /* Following functions are local */
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 )
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;
310 p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
312 if( p_pic->p_sys == NULL )
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;
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;
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;
338 p_pic->p_sys->i_frame = I_OUTPUTPICTURES;