]> git.sesse.net Git - vlc/blob - plugins/sdl/vout_sdl.c
. Fixed a segfault
[vlc] / plugins / sdl / vout_sdl.c
1 /*****************************************************************************
2  * vout_sdl.c: SDL video output display method
3  *****************************************************************************
4  * Copyright (C) 1998, 1999, 2000 VideoLAN
5  *
6  * Authors:
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  * 
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
21  *****************************************************************************/
22
23 /*****************************************************************************
24  * Preamble
25  *****************************************************************************/
26 #include "defs.h"
27
28 #include <errno.h>                                                 /* ENOMEM */
29 #include <stdlib.h>                                                /* free() */
30 #include <string.h>                                            /* strerror() */
31
32 #include <SDL/SDL.h>
33
34 #include "config.h"
35 #include "common.h"
36 #include "threads.h"
37 #include "mtime.h"
38 #include "plugins.h"
39
40 #include "video.h"
41 #include "video_output.h"
42
43 #include "intf_msg.h"
44
45 /*****************************************************************************
46  * vout_sys_t: video output SDL method descriptor
47  *****************************************************************************
48  * This structure is part of the video output thread descriptor.
49  * It describes the SDL specific properties of an output thread.
50  *****************************************************************************/
51 typedef struct vout_sys_s
52 {
53     SDL_Surface *   p_display;                             /* display device */
54     Uint8   *   p_buffer[2];
55                                                      /* Buffers informations */
56     boolean_t   b_must_acquire;           /* must be acquired before writing */
57 }   vout_sys_t;
58
59 /*****************************************************************************
60  * Local prototypes
61  *****************************************************************************/
62 static int     SDLOpenDisplay   ( vout_thread_t *p_vout, 
63                                   char *psz_display, void *p_data );
64 static void    SDLCloseDisplay  ( vout_thread_t *p_vout );
65
66 /*****************************************************************************
67  * vout_SDLCreate: allocate SDL video thread output method
68  *****************************************************************************
69  * This function allocate and initialize a SDL vout method. It uses some of the
70  * vout properties to choose the correct mode, and change them according to the
71  * mode actually used.
72  *****************************************************************************/
73 int vout_SDLCreate( vout_thread_t *p_vout, char *psz_display,
74                     int i_root_window, void *p_data )
75 {
76     /* Allocate structure */
77     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
78     if( p_vout->p_sys == NULL )
79     {
80         intf_ErrMsg( "error: %s\n", strerror(ENOMEM) );
81         return( 1 );
82     }
83
84     /* Open and initialize device */
85     
86     if( SDLOpenDisplay( p_vout, psz_display, p_data ) )
87     {
88         intf_ErrMsg( "error: can't initialize SDL display\n" );
89         free( p_vout->p_sys );
90         return( 1 );
91     }
92     return( 0 );
93 }
94
95 /*****************************************************************************
96  * vout_SDLInit: initialize SDL video thread output method
97  *****************************************************************************
98  * This function initialize the SDL display device.
99  *****************************************************************************/
100 int vout_SDLInit( vout_thread_t *p_vout )
101 {
102     /* Acquire first buffer */
103     if( p_vout->p_sys->b_must_acquire )
104     {
105                 SDL_LockSurface(p_vout->p_sys->p_display);
106     }
107
108     return( 0 );
109 }
110
111 /*****************************************************************************
112  * vout_SDLEnd: terminate Sys video thread output method
113  *****************************************************************************
114  * Terminate an output method created by vout_SDLCreate
115  *****************************************************************************/
116 void vout_SDLEnd( vout_thread_t *p_vout )
117 {
118     /* Release buffer */
119     if( p_vout->p_sys->b_must_acquire )
120     {
121         SDL_UnlockSurface ( p_vout->p_sys->p_display );
122     }
123 }
124
125 /*****************************************************************************
126  * vout_SDLDestroy: destroy Sys video thread output method
127  *****************************************************************************
128  * Terminate an output method created by vout_SDLCreate
129  *****************************************************************************/
130 void vout_SDLDestroy( vout_thread_t *p_vout )
131 {
132     SDLCloseDisplay( p_vout );
133     free( p_vout->p_sys );
134 }
135
136 /*****************************************************************************
137  * vout_SDLManage: handle Sys events
138  *****************************************************************************
139  * This function should be called regularly by video output thread. It returns
140  * a non null value if an error occured.
141  *****************************************************************************/
142 int vout_SDLManage( vout_thread_t *p_vout )
143 {
144     /* FIXME: 8bpp: change palette ?? */
145     return( 0 );
146 }
147
148 /*****************************************************************************
149  * vout_SDLDisplay: displays previously rendered output
150  *****************************************************************************
151  * This function send the currently rendered image to the display, wait until
152  * it is displayed and switch the two rendering buffer, preparing next frame.
153  *****************************************************************************/
154 void vout_SDLDisplay( vout_thread_t *p_vout )
155 {
156     SDL_Overlay * screen;
157     SDL_Rect    disp;
158     if(1)
159     {
160         /* Change display frame */
161         if( p_vout->p_sys->b_must_acquire )
162         {
163             
164             SDL_Flip( p_vout->p_sys->p_display );
165             
166             /* Swap buffers and change write frame */
167             SDL_LockSurface ( p_vout->p_sys->p_display );
168         }
169     } 
170     else 
171     {
172         /*
173          * p_vout->yuv.p_buffer contains the YUV buffer to render 
174          */
175         
176         screen = SDL_CreateYUVOverlay( p_vout->i_width, p_vout->i_height , SDL_IYUV_OVERLAY, p_vout->p_sys->p_display );
177         screen->pixels = p_vout->yuv.p_buffer;
178         disp.x = 0;
179         disp.y = 0;
180         disp.w = p_vout->i_width;
181         disp.h = p_vout->i_height;
182         SDL_DisplayYUVOverlay( screen , &disp );
183     }        
184 }
185
186 /* following functions are local */
187
188 /*****************************************************************************
189  * SDLOpenDisplay: open and initialize SDL device
190  *****************************************************************************
191  * Open and initialize display according to preferences specified in the vout
192  * thread fields.
193  *****************************************************************************/
194 static int SDLOpenDisplay( vout_thread_t *p_vout, char *psz_display, void *p_data )
195 {
196     
197     /* Initialize library */
198     if( SDL_Init(SDL_INIT_VIDEO) < 0 )
199     {
200         intf_ErrMsg( "error: can't initialize SDL library: %s\n",
201                      SDL_GetError() );
202         return( 1 );
203     }
204
205     /* Open display 
206      * TODO: Check that we can request for a DOUBLEBUF HWSURFACE display
207      */
208     if(psz_display != NULL && strcmp(psz_display,"fullscreen")==0)
209     {
210         p_vout->p_sys->p_display = SDL_SetVideoMode(p_vout->i_width, 
211             p_vout->i_height, 
212             0, 
213             SDL_ANYFORMAT | SDL_HWSURFACE | SDL_DOUBLEBUF | SDL_FULLSCREEN );
214         SDL_ShowCursor( 0 );
215     } else {
216         p_vout->p_sys->p_display = SDL_SetVideoMode(p_vout->i_width, 
217             p_vout->i_height, 
218             0, 
219             SDL_ANYFORMAT | SDL_HWSURFACE | SDL_DOUBLEBUF  );
220         SDL_ShowCursor( 1 );
221     }
222         
223     if( p_vout->p_sys->p_display == NULL )
224     {
225         intf_ErrMsg( "error: can't open DISPLAY default display\n" );
226         return( 1 );
227     }
228     SDL_WM_SetCaption( VOUT_TITLE , VOUT_TITLE );
229     SDL_EventState(SDL_KEYUP , SDL_IGNORE);     /* ignore keys up */
230
231     /* Check buffers properties */      
232     p_vout->p_sys->b_must_acquire = 1;          /* always acquire */
233         p_vout->p_sys->p_buffer[ 0 ] =
234              p_vout->p_sys->p_display->pixels;
235         
236         SDL_Flip(p_vout->p_sys->p_display);
237         p_vout->p_sys->p_buffer[ 1 ] =
238              p_vout->p_sys->p_display->pixels;
239         SDL_Flip(p_vout->p_sys->p_display);
240
241     /* Set graphic context colors */
242
243 /*
244         col_fg.r = col_fg.g = col_fg.b = -1;
245     col_bg.r = col_bg.g = col_bg.b = 0;
246     if( ggiSetGCForeground(p_vout->p_sys->p_display,
247                            ggiMapColor(p_vout->p_sys->p_display,&col_fg)) ||
248         ggiSetGCBackground(p_vout->p_sys->p_display,
249                            ggiMapColor(p_vout->p_sys->p_display,&col_bg)) )
250     {
251         intf_ErrMsg("error: can't set colors\n");
252         ggiClose( p_vout->p_sys->p_display );
253         ggiExit();
254         return( 1 );
255     }
256 */
257                 
258     /* Set clipping for text */
259     SDL_SetClipping(p_vout->p_sys->p_display, 0, 0, 
260                     p_vout->p_sys->p_display->w,
261                     p_vout->p_sys->p_display->h);
262
263
264         
265     /* Set thread information */
266     p_vout->i_width =           p_vout->p_sys->p_display->w;
267     p_vout->i_height =          p_vout->p_sys->p_display->h;
268
269     p_vout->i_bytes_per_line = p_vout->p_sys->p_display->format->BytesPerPixel *
270                                 p_vout->p_sys->p_display->w ;
271                 
272     p_vout->i_screen_depth =    p_vout->p_sys->p_display->format->BitsPerPixel;
273     p_vout->i_bytes_per_pixel = p_vout->p_sys->p_display->format->BytesPerPixel;
274     p_vout->i_red_mask =        p_vout->p_sys->p_display->format->Rmask;
275     p_vout->i_green_mask =      p_vout->p_sys->p_display->format->Gmask;
276     p_vout->i_blue_mask =       p_vout->p_sys->p_display->format->Bmask;
277
278     /* FIXME: palette in 8bpp ?? */
279     /* Set and initialize buffers */
280     vout_SetBuffers( p_vout, p_vout->p_sys->p_buffer[ 0 ],
281                              p_vout->p_sys->p_buffer[ 1 ] );
282
283     return( 0 );
284 }
285
286 /*****************************************************************************
287  * SDLCloseDisplay: close and reset SDL device
288  *****************************************************************************
289  * This function returns all resources allocated by SDLOpenDisplay and restore
290  * the original state of the device.
291  *****************************************************************************/
292 static void SDLCloseDisplay( vout_thread_t *p_vout )
293 {
294     SDL_FreeSurface( p_vout->p_sys->p_display );
295     SDL_Quit();
296 }
297