1 /*****************************************************************************
2 * vout_sdl.c: SDL video output display method
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
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.
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.
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 *****************************************************************************/
23 /*****************************************************************************
25 *****************************************************************************/
28 #include <errno.h> /* ENOMEM */
29 #include <stdlib.h> /* free() */
30 #include <string.h> /* strerror() */
41 #include "video_output.h"
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
55 SDL_Surface * p_display; /* display device */
56 SDL_Overlay * p_overlay; /* overlay device */
57 boolean_t b_fullscreen;
58 boolean_t b_reopen_display;
60 /* Buffers informations */
61 boolean_t b_must_acquire; /* must be acquired before writing */
64 /*****************************************************************************
66 *****************************************************************************/
67 static int SDLOpenDisplay ( vout_thread_t *p_vout );
68 static void SDLCloseDisplay ( vout_thread_t *p_vout );
70 /*****************************************************************************
71 * vout_SDLCreate: allocate SDL video thread output method
72 *****************************************************************************
73 * This function allocate and initialize a SDL vout method. It uses some of the
74 * vout properties to choose the correct mode, and change them according to the
76 *****************************************************************************/
77 int vout_SDLCreate( vout_thread_t *p_vout, char *psz_display,
78 int i_root_window, void *p_data )
80 /* Allocate structure */
81 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
82 if( p_vout->p_sys == NULL )
84 intf_ErrMsg( "error: %s", strerror(ENOMEM) );
88 p_vout->p_sys->p_display = NULL;
89 p_vout->p_sys->p_overlay = NULL;
90 p_vout->p_sys->b_must_acquire = 0;
92 /* Initialize library */
93 if( SDL_Init(SDL_INIT_VIDEO) < 0 )
95 intf_ErrMsg( "error: can't initialize SDL library: %s",
97 free( p_vout->p_sys );
101 /* Force the software yuv even if it is not used */
102 /* If we don't do this, p_vout is not correctly initialized
103 and it's impossible to switch between soft/hard yuv */
104 p_vout->b_need_render = 1;
106 if(psz_display != NULL && strcmp(psz_display,"fullscreen")==0)
108 p_vout->p_sys->b_fullscreen = 1;
112 p_vout->p_sys->b_fullscreen = 0;
115 p_vout->p_sys->i_width = VOUT_WIDTH_DEFAULT;
116 p_vout->p_sys->i_height = VOUT_HEIGHT_DEFAULT;
118 p_vout->p_sys->b_reopen_display = 0;
120 if( SDLOpenDisplay(p_vout) )
122 intf_ErrMsg( "error: can't initialize SDL library: %s",
124 free( p_vout->p_sys );
131 /*****************************************************************************
132 * vout_SDLInit: initialize SDL video thread output method
133 *****************************************************************************
134 * This function initialize the SDL display device.
135 *****************************************************************************/
136 int vout_SDLInit( vout_thread_t *p_vout )
138 /* Acquire first buffer */
139 if( p_vout->p_sys->b_must_acquire )
141 SDL_LockSurface(p_vout->p_sys->p_display);
147 /*****************************************************************************
148 * vout_SDLEnd: terminate Sys video thread output method
149 *****************************************************************************
150 * Terminate an output method created by vout_SDLCreate
151 *****************************************************************************/
152 void vout_SDLEnd( vout_thread_t *p_vout )
155 if( p_vout->p_sys->b_must_acquire )
157 SDL_UnlockSurface ( p_vout->p_sys->p_display );
159 free( p_vout->p_sys );
162 /*****************************************************************************
163 * vout_SDLDestroy: destroy Sys video thread output method
164 *****************************************************************************
165 * Terminate an output method created by vout_SDLCreate
166 *****************************************************************************/
167 void vout_SDLDestroy( vout_thread_t *p_vout )
169 SDLCloseDisplay( p_vout );
170 free( p_vout->p_sys );
173 /*****************************************************************************
174 * vout_SDLManage: handle Sys events
175 *****************************************************************************
176 * This function should be called regularly by video output thread. It returns
177 * a non null value if an error occured.
178 *****************************************************************************/
179 int vout_SDLManage( vout_thread_t *p_vout )
181 /* If the display has to be reopened we do so */
182 if( p_vout->p_sys->b_reopen_display )
184 p_vout->p_sys->b_must_acquire = 0;
185 if( p_vout->p_sys->p_display )
187 if( p_vout->p_sys->p_overlay )
189 SDL_FreeYUVOverlay(p_vout->p_sys->p_overlay);
190 p_vout->p_sys->p_overlay = NULL;
192 SDL_FreeSurface( p_vout->p_sys->p_display );
193 p_vout->p_sys->p_display = NULL;
196 if( SDLOpenDisplay(p_vout) )
198 intf_ErrMsg( "error: can't open DISPLAY default display" );
201 p_vout->p_sys->b_reopen_display = 0;
206 /*****************************************************************************
207 * vout_SDLDisplay: displays previously rendered output
208 *****************************************************************************
209 * This function send the currently rendered image to the display, wait until
210 * it is displayed and switch the two rendering buffer, preparing next frame.
211 *****************************************************************************/
212 void vout_SDLDisplay( vout_thread_t *p_vout )
215 if(p_vout->b_need_render)
217 /* Change display frame */
218 if( p_vout->p_sys->b_must_acquire )
221 SDL_Flip( p_vout->p_sys->p_display );
223 /* Swap buffers and change write frame */
224 SDL_LockSurface ( p_vout->p_sys->p_display );
231 * p_vout->p_rendered_pic->p_y/u/v contains the YUV buffers to render
233 if( p_vout->p_sys->b_must_acquire )
235 /* TODO: support for streams other than 4:2:0 */
236 /* create the overlay if necessary */
237 if( p_vout->p_sys->p_overlay == NULL )
239 p_vout->p_sys->p_overlay = SDL_CreateYUVOverlay(
240 p_vout->p_rendered_pic->i_width,
241 p_vout->p_rendered_pic->i_height,
243 p_vout->p_sys->p_display
245 intf_Msg("[YUV acceleration] : %d,",
246 p_vout->p_sys->p_overlay->hw_overlay);
249 SDL_LockYUVOverlay(p_vout->p_sys->p_overlay);
250 /* copy the data into video buffers */
252 memcpy(p_vout->p_sys->p_overlay->pixels[0],
253 p_vout->p_rendered_pic->p_y,
254 p_vout->p_sys->p_overlay->h *
255 p_vout->p_sys->p_overlay->pitches[0]);
257 memcpy(p_vout->p_sys->p_overlay->pixels[1],
258 p_vout->p_rendered_pic->p_v,
259 p_vout->p_sys->p_overlay->h *
260 p_vout->p_sys->p_overlay->pitches[1] / 2);
262 memcpy(p_vout->p_sys->p_overlay->pixels[2],
263 p_vout->p_rendered_pic->p_u,
264 p_vout->p_sys->p_overlay->h *
265 p_vout->p_sys->p_overlay->pitches[2] / 2);
267 disp.w = (&p_vout->p_buffer[p_vout->i_buffer_index])->i_pic_width;
268 disp.h = (&p_vout->p_buffer[p_vout->i_buffer_index])->i_pic_height;
269 disp.x = (p_vout->i_width - disp.w)/2;
270 disp.y = (p_vout->i_height - disp.h)/2;
272 SDL_DisplayYUVOverlay( p_vout->p_sys->p_overlay , &disp );
273 SDL_UnlockYUVOverlay(p_vout->p_sys->p_overlay);
278 /* following functions are local */
280 /*****************************************************************************
281 * SDLOpenDisplay: open and initialize SDL device
282 *****************************************************************************
283 * Open and initialize display according to preferences specified in the vout
285 *****************************************************************************/
286 static int SDLOpenDisplay( vout_thread_t *p_vout )
288 SDL_Rect clipping_rect;
292 * TODO: Check that we can request for a DOUBLEBUF HWSURFACE display
295 /* init flags and cursor */
296 flags = SDL_ANYFORMAT;
298 if( p_vout->p_sys->b_fullscreen )
299 flags |= SDL_FULLSCREEN;
301 flags |= SDL_RESIZABLE;
303 if( p_vout->b_need_render )
304 flags |= SDL_HWSURFACE | SDL_DOUBLEBUF;
306 flags |= SDL_SWSURFACE; /* save video memory */
308 bpp = SDL_VideoModeOK(p_vout->p_sys->i_width,
309 p_vout->p_sys->i_height,
310 p_vout->i_screen_depth, flags);
314 intf_ErrMsg( "error: can't open DISPLAY default display" );
318 p_vout->p_sys->p_display = SDL_SetVideoMode(p_vout->p_sys->i_width,
319 p_vout->p_sys->i_height,
322 if( p_vout->p_sys->p_display == NULL )
324 intf_ErrMsg( "error: can't open DISPLAY default display" );
328 if( p_vout->p_sys->b_fullscreen )
333 SDL_WM_SetCaption( VOUT_TITLE , VOUT_TITLE );
334 SDL_EventState(SDL_KEYUP , SDL_IGNORE); /* ignore keys up */
336 if( p_vout->b_need_render )
338 p_vout->p_sys->p_buffer[ 0 ] = p_vout->p_sys->p_display->pixels;
339 SDL_Flip(p_vout->p_sys->p_display);
340 p_vout->p_sys->p_buffer[ 1 ] = p_vout->p_sys->p_display->pixels;
341 SDL_Flip(p_vout->p_sys->p_display);
343 /* Set clipping for text */
346 clipping_rect.w = p_vout->p_sys->p_display->w;
347 clipping_rect.h = p_vout->p_sys->p_display->h;
348 SDL_SetClipRect(p_vout->p_sys->p_display, &clipping_rect);
350 /* Set thread information */
351 p_vout->i_width = p_vout->p_sys->p_display->w;
352 p_vout->i_height = p_vout->p_sys->p_display->h;
353 p_vout->i_bytes_per_line = p_vout->p_sys->p_display->pitch;
355 p_vout->i_screen_depth =
356 p_vout->p_sys->p_display->format->BitsPerPixel;
357 p_vout->i_bytes_per_pixel =
358 p_vout->p_sys->p_display->format->BytesPerPixel;
360 p_vout->i_red_mask = p_vout->p_sys->p_display->format->Rmask;
361 p_vout->i_green_mask = p_vout->p_sys->p_display->format->Gmask;
362 p_vout->i_blue_mask = p_vout->p_sys->p_display->format->Bmask;
364 /* FIXME: palette in 8bpp ?? */
365 /* Set and initialize buffers */
366 vout_SetBuffers( p_vout, p_vout->p_sys->p_buffer[ 0 ],
367 p_vout->p_sys->p_buffer[ 1 ] );
371 p_vout->p_sys->p_buffer[ 0 ] = p_vout->p_sys->p_display->pixels;
372 p_vout->p_sys->p_buffer[ 1 ] = p_vout->p_sys->p_display->pixels;
374 /* Set thread information */
375 p_vout->i_width = p_vout->p_sys->p_display->w;
376 p_vout->i_height = p_vout->p_sys->p_display->h;
377 p_vout->i_bytes_per_line = p_vout->p_sys->p_display->pitch;
379 vout_SetBuffers( p_vout, p_vout->p_sys->p_buffer[ 0 ],
380 p_vout->p_sys->p_buffer[ 1 ] );
383 p_vout->i_changes |= VOUT_YUV_CHANGE;
385 /* Check buffers properties */
386 p_vout->p_sys->b_must_acquire = 1; /* always acquire */
391 /*****************************************************************************
392 * SDLCloseDisplay: close and reset SDL device
393 *****************************************************************************
394 * This function returns all resources allocated by SDLOpenDisplay and restore
395 * the original state of the device.
396 *****************************************************************************/
397 static void SDLCloseDisplay( vout_thread_t *p_vout )
399 if( p_vout->p_sys->p_display )
401 p_vout->p_sys->b_must_acquire = 0;
402 if( p_vout->p_sys->p_overlay )
404 SDL_FreeYUVOverlay(p_vout->p_sys->p_overlay);
405 p_vout->p_sys->p_overlay = NULL;
407 SDL_UnlockSurface(p_vout->p_sys->p_display);
408 SDL_FreeSurface( p_vout->p_sys->p_display );
409 p_vout->p_sys->p_display = NULL;