1 /*****************************************************************************
2 * mga.c : Matrox Graphic Array plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 VideoLAN
5 * $Id: mga.c,v 1.17 2002/04/19 13:56:11 sam Exp $
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <errno.h> /* ENOMEM */
29 #include <unistd.h> /* close() */
30 #include <stdlib.h> /* free() */
31 #include <string.h> /* strerror() */
32 #include <fcntl.h> /* open() */
33 #include <sys/ioctl.h> /* ioctl() */
34 #include <sys/mman.h> /* PROT_WRITE */
36 #include <videolan/vlc.h>
39 #include <sys/types.h> /* typedef ushort */
43 #include "video_output.h"
45 /*****************************************************************************
46 * Capabilities defined in the other files.
47 *****************************************************************************/
48 static void vout_getfunctions( function_list_t * p_function_list );
50 static int vout_Create ( vout_thread_t * );
51 static int vout_Init ( vout_thread_t * );
52 static void vout_End ( vout_thread_t * );
53 static void vout_Destroy ( vout_thread_t * );
54 static int vout_Manage ( vout_thread_t * );
55 static void vout_Render ( vout_thread_t *, picture_t * );
56 static void vout_Display ( vout_thread_t *, picture_t * );
58 static int NewPicture ( vout_thread_t *, picture_t * );
60 /*****************************************************************************
61 * Building configuration tree
62 *****************************************************************************/
67 SET_DESCRIPTION( _("Matrox Graphic Array video module") )
68 ADD_CAPABILITY( VOUT, 10 )
73 vout_getfunctions( &p_module->p_functions->vout );
76 MODULE_DEACTIVATE_START
77 MODULE_DEACTIVATE_STOP
79 /*****************************************************************************
80 * vout_sys_t: video output MGA method descriptor
81 *****************************************************************************
82 * This structure is part of the video output thread descriptor.
83 * It describes the MGA specific properties of an output thread.
84 *****************************************************************************/
85 #ifndef __LINUX_MGAVID_H
86 # define __LINUX_MGAVID_H
88 # define MGA_VID_CONFIG _IOR('J', 1, mga_vid_config_t)
89 # define MGA_VID_ON _IO ('J', 2)
90 # define MGA_VID_OFF _IO ('J', 3)
91 # define MGA_VID_FSEL _IOR('J', 4, int)
92 # define MGA_G200 0x1234
93 # define MGA_G400 0x5678
95 # define MGA_VID_FORMAT_YV12 0x32315659
96 # define MGA_VID_FORMAT_IYUV (('I'<<24)|('Y'<<16)|('U'<<8)|'V')
97 # define MGA_VID_FORMAT_I420 (('I'<<24)|('4'<<16)|('2'<<8)|'0')
98 # define MGA_VID_FORMAT_YUY2 (('Y'<<24)|('U'<<16)|('Y'<<8)|'2')
99 # define MGA_VID_FORMAT_UYVY (('U'<<24)|('Y'<<16)|('V'<<8)|'Y')
101 # define MGA_VID_VERSION 0x0201
103 # define MGA_NUM_FRAMES 1
105 typedef struct mga_vid_config_s
126 typedef struct vout_sys_s
128 mga_vid_config_t mga;
134 typedef struct picture_sys_s
140 #define CEIL32(x) (((x)+31)&~31)
142 /*****************************************************************************
143 * Functions exported as capabilities. They are declared as static so that
144 * we don't pollute the namespace too much.
145 *****************************************************************************/
146 static void vout_getfunctions( function_list_t * p_function_list )
148 p_function_list->functions.vout.pf_create = vout_Create;
149 p_function_list->functions.vout.pf_init = vout_Init;
150 p_function_list->functions.vout.pf_end = vout_End;
151 p_function_list->functions.vout.pf_destroy = vout_Destroy;
152 p_function_list->functions.vout.pf_manage = vout_Manage;
153 p_function_list->functions.vout.pf_render = vout_Render;
154 p_function_list->functions.vout.pf_display = vout_Display;
157 /*****************************************************************************
158 * vout_Create: allocates dummy video thread output method
159 *****************************************************************************
160 * This function allocates and initializes a dummy vout method.
161 *****************************************************************************/
162 static int vout_Create( vout_thread_t *p_vout )
164 /* Allocate structure */
165 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
166 if( p_vout->p_sys == NULL )
168 intf_ErrMsg("vout error: %s", strerror(ENOMEM) );
172 p_vout->p_sys->i_fd = open( "/dev/mga_vid", O_RDWR );
173 if( p_vout->p_sys->i_fd == -1 )
175 intf_ErrMsg( "vout error: can't open MGA driver /dev/mga_vid" );
176 free( p_vout->p_sys );
183 /*****************************************************************************
184 * vout_Init: initialize dummy video thread output method
185 *****************************************************************************/
186 static int vout_Init( vout_thread_t *p_vout )
191 I_OUTPUTPICTURES = 0;
193 /* create the MGA output */
194 p_vout->output.i_width = p_vout->render.i_width;
195 p_vout->output.i_height = p_vout->render.i_height;
196 p_vout->output.i_aspect = p_vout->render.i_aspect;
198 /* Set coordinates and aspect ratio */
199 p_vout->p_sys->mga.src_width = CEIL32(p_vout->output.i_width);
200 p_vout->p_sys->mga.src_height = p_vout->output.i_height;
201 vout_PlacePicture( p_vout, 1024, 768,
202 &p_vout->p_sys->mga.x_org, &p_vout->p_sys->mga.y_org,
203 &p_vout->p_sys->mga.dest_width,
204 &p_vout->p_sys->mga.dest_height );
206 /* Initialize a video buffer */
207 p_vout->p_sys->mga.colkey_on = 0;
208 p_vout->p_sys->mga.num_frames = MGA_NUM_FRAMES;
209 p_vout->p_sys->mga.frame_size = CEIL32(p_vout->output.i_width)
210 * p_vout->output.i_height * 2;
211 p_vout->p_sys->mga.version = MGA_VID_VERSION;
213 /* Assume we only do YMGA for the moment. XXX: mga_vid calls this
214 * YV12, but it's actually some strange format with packed UV. */
215 p_vout->output.i_chroma = FOURCC_YMGA;
216 p_vout->p_sys->mga.format = MGA_VID_FORMAT_YV12;
218 if( ioctl(p_vout->p_sys->i_fd, MGA_VID_CONFIG, &p_vout->p_sys->mga) )
220 intf_ErrMsg( "vout error: MGA config ioctl failed" );
224 if( p_vout->p_sys->mga.card_type == MGA_G200 )
226 intf_WarnMsg( 3, "vout info: detected MGA G200 (%d MB Ram)",
227 p_vout->p_sys->mga.ram_size );
231 intf_WarnMsg( 3, "vout info: detected MGA G400/G450 (%d MB Ram)",
232 p_vout->p_sys->mga.ram_size );
235 p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->mga.frame_size
237 PROT_WRITE, MAP_SHARED,
238 p_vout->p_sys->i_fd, 0 );
240 /* Try to initialize up to MGA_NUM_FRAMES direct buffers */
241 while( I_OUTPUTPICTURES < MGA_NUM_FRAMES )
245 /* Find an empty picture slot */
246 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
248 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
250 p_pic = p_vout->p_picture + i_index;
255 /* Allocate the picture */
256 if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
261 p_pic->i_status = DESTROYED_PICTURE;
262 p_pic->i_type = DIRECT_PICTURE;
264 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
269 /* Blank the windows */
270 for( i_index = 0; i_index < I_OUTPUTPICTURES; i_index++ )
272 memset( p_vout->p_sys->p_video
273 + p_vout->p_sys->mga.frame_size * i_index,
274 0x00, p_vout->p_sys->mga.frame_size / 2 );
275 memset( p_vout->p_sys->p_video
276 + p_vout->p_sys->mga.frame_size * ( 2*i_index + 1 ) / 2,
277 0x80, p_vout->p_sys->mga.frame_size / 2 );
280 /* Display the image */
281 ioctl( p_vout->p_sys->i_fd, MGA_VID_ON, 0 );
286 /*****************************************************************************
287 * vout_End: terminate dummy video thread output method
288 *****************************************************************************/
289 static void vout_End( vout_thread_t *p_vout )
293 ioctl( p_vout->p_sys->i_fd, MGA_VID_OFF, 0 );
295 /* Free the output buffers we allocated */
296 for( i_index = I_OUTPUTPICTURES ; i_index ; )
302 /*****************************************************************************
303 * vout_Destroy: destroy dummy video thread output method
304 *****************************************************************************
305 * Terminate an output method created by DummyCreateOutputMethod
306 *****************************************************************************/
307 static void vout_Destroy( vout_thread_t *p_vout )
309 close( p_vout->p_sys->i_fd );
311 free( p_vout->p_sys );
314 /*****************************************************************************
315 * vout_Manage: handle dummy events
316 *****************************************************************************
317 * This function should be called regularly by video output thread. It manages
318 * console events. It returns a non null value on error.
319 *****************************************************************************/
320 static int vout_Manage( vout_thread_t *p_vout )
325 /*****************************************************************************
326 * vout_Render: displays previously calculated output
327 *****************************************************************************/
328 static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
330 /* Grmbl, if we have a G200 which mistakenly assumes 4:2:0 planar
331 * has *packed* chroma information, we'll need to do some
332 * vonversion... but vlc does this for us. */
335 /*****************************************************************************
336 * vout_Display: displays previously rendered output
337 *****************************************************************************/
338 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
340 ioctl( p_vout->p_sys->i_fd, MGA_VID_FSEL, &p_pic->p_sys->i_frame );
343 /* Following functions are local */
345 /*****************************************************************************
346 * NewPicture: allocate a picture
347 *****************************************************************************
348 * Returns 0 on success, -1 otherwise
349 *****************************************************************************/
350 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
352 /* We know the chroma, allocate a buffer which will be used
353 * directly by the decoder */
354 p_pic->p_data = p_vout->p_sys->p_video + I_OUTPUTPICTURES
355 * p_vout->p_sys->mga.frame_size;
357 p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
359 if( p_pic->p_sys == NULL )
364 p_pic->Y_PIXELS = p_pic->p_data;
365 p_pic->p[Y_PLANE].i_lines = p_vout->output.i_height;
366 p_pic->p[Y_PLANE].i_pitch = CEIL32( p_vout->output.i_width );
367 p_pic->p[Y_PLANE].i_pixel_bytes = 1;
369 if( p_pic->p[Y_PLANE].i_pitch == p_vout->output.i_width )
371 p_pic->p[Y_PLANE].b_margin = 0;
375 /* FIXME: do something here */
376 p_pic->p[Y_PLANE].b_margin = 0;
379 p_pic->U_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 2/4;
380 p_pic->p[U_PLANE].i_lines = p_vout->output.i_height / 2;
381 p_pic->p[U_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;
382 p_pic->p[U_PLANE].i_pixel_bytes = 1;
383 p_pic->p[U_PLANE].b_margin = 0;
385 p_pic->V_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 3/4;
386 p_pic->p[V_PLANE].i_lines = p_vout->output.i_height / 2;
387 p_pic->p[V_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;
388 p_pic->p[V_PLANE].i_pixel_bytes = 1;
389 p_pic->p[V_PLANE].b_margin = 0;
391 p_pic->p_sys->i_frame = I_OUTPUTPICTURES;