video_output.c 24.7 KB
Newer Older
1
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
2 3 4
 * video_output.c : video output thread
 * This module describes the programming interface for video output threads.
 * It includes functions allowing to open a new thread, send pictures to a
5 6
 * thread, and destroy a previously oppened video output thread.
 *****************************************************************************
7
 * Copyright (C) 2000-2001 VideoLAN
8
 * $Id: video_output.c,v 1.159 2002/02/18 19:02:41 stef Exp $
9
 *
Sam Hocevar's avatar
 
Sam Hocevar committed
10
 * Authors: Vincent Seguin <seguin@via.ecp.fr>
11 12 13 14 15
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
Sam Hocevar's avatar
Sam Hocevar committed
16
 *
17 18
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 20
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
21
 *
22 23 24
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
25
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
26

27
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
28
 * Preamble
29
 *****************************************************************************/
30 31 32 33
#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <stdio.h>                                              /* sprintf() */
#include <string.h>                                            /* strerror() */
Vincent Seguin's avatar
Vincent Seguin committed
34

Sam Hocevar's avatar
 
Sam Hocevar committed
35 36
#include <videolan/vlc.h>

37 38
#ifdef HAVE_SYS_TIMES_H
#   include <sys/times.h>
39
#endif
40

Michel Kaempf's avatar
Michel Kaempf committed
41 42
#include "video.h"
#include "video_output.h"
43

44
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
45
 * Local prototypes
46
 *****************************************************************************/
47 48 49 50 51
static int      InitThread        ( vout_thread_t *p_vout );
static void     RunThread         ( vout_thread_t *p_vout );
static void     ErrorThread       ( vout_thread_t *p_vout );
static void     EndThread         ( vout_thread_t *p_vout );
static void     DestroyThread     ( vout_thread_t *p_vout, int i_status );
Sam Hocevar's avatar
 
Sam Hocevar committed
52
static int      ReduceHeight      ( int );
Michel Kaempf's avatar
Michel Kaempf committed
53

Sam Hocevar's avatar
 
Sam Hocevar committed
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76
/*****************************************************************************
 * vout_InitBank: initialize the video output bank.
 *****************************************************************************/
void vout_InitBank ( void )
{
    p_vout_bank->i_count = 0;

    vlc_mutex_init( &p_vout_bank->lock );
}

/*****************************************************************************
 * vout_EndBank: empty the video output bank.
 *****************************************************************************
 * This function ends all unused video outputs and empties the bank in
 * case of success.
 *****************************************************************************/
void vout_EndBank ( void )
{
    /* Ask all remaining video outputs to die */
    while( p_vout_bank->i_count )
    {
        vout_DestroyThread(
                p_vout_bank->pp_vout[ --p_vout_bank->i_count ], NULL );
Sam Hocevar's avatar
 
Sam Hocevar committed
77
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
78 79 80 81

    vlc_mutex_destroy( &p_vout_bank->lock );
}

82
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
83
 * vout_CreateThread: creates a new video output thread
84
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
85 86 87
 * This function creates a new video output thread, and returns a pointer
 * to its description. On error, it returns NULL.
 * If pi_status is NULL, then the function will block until the thread is ready.
88
 * If not, it will be updated using one of the THREAD_* constants.
89
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
90 91
vout_thread_t * vout_CreateThread   ( int *pi_status,
                                      int i_width, int i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
92
                                      u32 i_chroma, int i_aspect )
Michel Kaempf's avatar
Michel Kaempf committed
93
{
94 95
    vout_thread_t * p_vout;                             /* thread descriptor */
    int             i_status;                               /* thread status */
Sam Hocevar's avatar
 
Sam Hocevar committed
96
    int             i_index;                                /* loop variable */
Sam Hocevar's avatar
 
Sam Hocevar committed
97
    char          * psz_plugin;
Michel Kaempf's avatar
Michel Kaempf committed
98

99
    /* Allocate descriptor */
Michel Kaempf's avatar
Michel Kaempf committed
100
    p_vout = (vout_thread_t *) malloc( sizeof(vout_thread_t) );
101
    if( p_vout == NULL )
Michel Kaempf's avatar
Michel Kaempf committed
102
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
103 104
        intf_ErrMsg( "vout error: vout thread creation returned %s",
                     strerror(ENOMEM) );
Michel Kaempf's avatar
Michel Kaempf committed
105 106
        return( NULL );
    }
107

Sam Hocevar's avatar
 
Sam Hocevar committed
108
    /* Choose the best module */
Sam Hocevar's avatar
 
Sam Hocevar committed
109 110 111 112 113 114
    psz_plugin = main_GetPszVariable( VOUT_FILTER_VAR, "" );
    if( psz_plugin[0] == '\0' )
    {
        psz_plugin = main_GetPszVariable( VOUT_METHOD_VAR, "" );
    }

115
    /* Initialize thread properties - thread id and locks will be initialized
116
     * later */
117
    p_vout->b_die               = 0;
118
    p_vout->b_error             = 0;
119 120
    p_vout->b_active            = 0;
    p_vout->pi_status           = (pi_status != NULL) ? pi_status : &i_status;
121
    *p_vout->pi_status          = THREAD_CREATE;
122

123
    /* Initialize pictures and subpictures - translation tables and functions
124
     * will be initialized later in InitThread */
125 126
    for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++)
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
127
        p_vout->p_picture[i_index].i_status = FREE_PICTURE;
Sam Hocevar's avatar
 
Sam Hocevar committed
128
        p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
129
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
130

131 132
    for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
133
        p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
Sam Hocevar's avatar
 
Sam Hocevar committed
134
        p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
135
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
136

Sam Hocevar's avatar
 
Sam Hocevar committed
137 138 139 140 141 142 143 144
    /* Initialize the rendering heap */
    p_vout->i_heap_size = 0;

    I_RENDERPICTURES = 0;
    p_vout->render.i_width    = i_width;
    p_vout->render.i_height   = i_height;
    p_vout->render.i_chroma   = i_chroma;
    p_vout->render.i_aspect   = i_aspect;
Sam Hocevar's avatar
 
Sam Hocevar committed
145 146

    /* Initialize misc stuff */
Sam Hocevar's avatar
 
Sam Hocevar committed
147 148 149 150 151 152
    p_vout->i_changes    = 0;
    p_vout->f_gamma      = 0;
    p_vout->b_grayscale  = 0;
    p_vout->b_info       = 0;
    p_vout->b_interface  = 0;
    p_vout->b_scale      = 1;
Gildas Bazin's avatar
 
Gildas Bazin committed
153
    p_vout->b_fullscreen = 0;
Sam Hocevar's avatar
 
Sam Hocevar committed
154
    p_vout->render_time  = 10;
155

Gildas Bazin's avatar
 
Gildas Bazin committed
156 157 158 159
    /* user requested fullscreen? */
    if( main_GetIntVariable( VOUT_FULLSCREEN_VAR, VOUT_FULLSCREEN_DEFAULT ) )
        p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;

Sam Hocevar's avatar
 
Sam Hocevar committed
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
    p_vout->p_module
        = module_Need( MODULE_CAPABILITY_VOUT, psz_plugin, (void *)p_vout );

    if( p_vout->p_module == NULL )
    {
        intf_ErrMsg( "vout error: no suitable vout module" );
        free( p_vout );
        return( NULL );
    }

#define f p_vout->p_module->p_functions->vout.functions.vout
    p_vout->pf_create     = f.pf_create;
    p_vout->pf_init       = f.pf_init;
    p_vout->pf_end        = f.pf_end;
    p_vout->pf_destroy    = f.pf_destroy;
    p_vout->pf_manage     = f.pf_manage;
    p_vout->pf_render     = f.pf_render;
    p_vout->pf_display    = f.pf_display;
#undef f

Michel Kaempf's avatar
Michel Kaempf committed
180
    /* Create thread and set locks */
Vincent Seguin's avatar
Vincent Seguin committed
181
    vlc_mutex_init( &p_vout->picture_lock );
182 183
    vlc_mutex_init( &p_vout->subpicture_lock );
    vlc_mutex_init( &p_vout->change_lock );
184

185 186
    if( vlc_thread_create( &p_vout->thread_id, "video output",
                           (void *) RunThread, (void *) p_vout) )
Michel Kaempf's avatar
Michel Kaempf committed
187
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
188
        intf_ErrMsg("vout error: %s", strerror(ENOMEM));
Sam Hocevar's avatar
 
Sam Hocevar committed
189
        p_vout->pf_destroy( p_vout );
Gildas Bazin's avatar
 
Gildas Bazin committed
190
        module_Unneed( p_vout->p_module );
Michel Kaempf's avatar
Michel Kaempf committed
191 192
        free( p_vout );
        return( NULL );
193
    }
Michel Kaempf's avatar
Michel Kaempf committed
194 195 196 197 198

    /* If status is NULL, wait until the thread is created */
    if( pi_status == NULL )
    {
        do
199
        {
Michel Kaempf's avatar
Michel Kaempf committed
200
            msleep( THREAD_SLEEP );
201
        }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
Michel Kaempf's avatar
Michel Kaempf committed
202 203 204
                && (i_status != THREAD_FATAL) );
        if( i_status != THREAD_READY )
        {
205 206
            return( NULL );
        }
Michel Kaempf's avatar
Michel Kaempf committed
207
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
208

Michel Kaempf's avatar
Michel Kaempf committed
209 210 211
    return( p_vout );
}

212
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
213
 * vout_DestroyThread: destroys a previously created thread
214 215
 *****************************************************************************
 * Destroy a terminated thread.
Michel Kaempf's avatar
Michel Kaempf committed
216
 * The function will request a destruction of the specified thread. If pi_error
217
 * is NULL, it will return once the thread is destroyed. Else, it will be
Michel Kaempf's avatar
Michel Kaempf committed
218
 * update using one of the THREAD_* constants.
219
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
220
void vout_DestroyThread( vout_thread_t *p_vout, int *pi_status )
221 222
{
    int     i_status;                                       /* thread status */
Michel Kaempf's avatar
Michel Kaempf committed
223 224 225

    /* Set status */
    p_vout->pi_status = (pi_status != NULL) ? pi_status : &i_status;
226 227
    *p_vout->pi_status = THREAD_DESTROY;

Michel Kaempf's avatar
Michel Kaempf committed
228 229 230 231
    /* Request thread destruction */
    p_vout->b_die = 1;

    /* If status is NULL, wait until thread has been destroyed */
232
    if( pi_status == NULL )
Michel Kaempf's avatar
Michel Kaempf committed
233 234 235 236
    {
        do
        {
            msleep( THREAD_SLEEP );
237 238
        } while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
                 && (i_status != THREAD_FATAL) );
Michel Kaempf's avatar
Michel Kaempf committed
239 240 241
    }
}

242
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
243
 * InitThread: initialize video output thread
244
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
245 246 247
 * This function is called from RunThread and performs the second step of the
 * initialization. It returns 0 on success. Note that the thread's flag are not
 * modified inside this function.
248
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
249
static int InitThread( vout_thread_t *p_vout )
Vincent Seguin's avatar
Vincent Seguin committed
250
{
Sam Hocevar's avatar
 
Sam Hocevar committed
251
    int i, i_pgcd;
Sam Hocevar's avatar
 
Sam Hocevar committed
252

Sam Hocevar's avatar
 
Sam Hocevar committed
253 254 255 256 257 258 259
    /* Update status */
    *p_vout->pi_status = THREAD_START;

    vlc_mutex_lock( &p_vout->change_lock );

#ifdef STATS
    p_vout->c_loops = 0;
Vincent Seguin's avatar
Vincent Seguin committed
260 261
#endif

Sam Hocevar's avatar
 
Sam Hocevar committed
262 263
    /* Initialize output method, it issues its own error messages */
    if( p_vout->pf_init( p_vout ) )
Vincent Seguin's avatar
Vincent Seguin committed
264
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
265 266 267 268
        vlc_mutex_unlock( &p_vout->change_lock );
        return( 1 );
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
269
    if( !I_OUTPUTPICTURES )
Sam Hocevar's avatar
 
Sam Hocevar committed
270 271 272
    {
        intf_ErrMsg( "vout error: plugin was unable to allocate at least "
                     "one direct buffer" );
Sam Hocevar's avatar
 
Sam Hocevar committed
273
        p_vout->pf_end( p_vout );
Sam Hocevar's avatar
 
Sam Hocevar committed
274 275
        vlc_mutex_unlock( &p_vout->change_lock );
        return( 1 );
276
    }
Vincent Seguin's avatar
Vincent Seguin committed
277

Sam Hocevar's avatar
 
Sam Hocevar committed
278 279 280
    intf_WarnMsg( 1, "vout info: got %i direct buffer(s)", I_OUTPUTPICTURES );

    i_pgcd = ReduceHeight( p_vout->render.i_aspect );
Sam Hocevar's avatar
 
Sam Hocevar committed
281
    intf_WarnMsg( 1, "vout info: picture in %ix%i, chroma 0x%.8x (%4.4s), "
Sam Hocevar's avatar
 
Sam Hocevar committed
282 283
                     "aspect ratio %i:%i",
                  p_vout->render.i_width, p_vout->render.i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
284 285
                  p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
                  p_vout->render.i_aspect / i_pgcd,
Sam Hocevar's avatar
 
Sam Hocevar committed
286 287 288
                  VOUT_ASPECT_FACTOR / i_pgcd );

    i_pgcd = ReduceHeight( p_vout->output.i_aspect );
Sam Hocevar's avatar
 
Sam Hocevar committed
289
    intf_WarnMsg( 1, "vout info: picture out %ix%i, chroma 0x%.8x (%4.4s), "
Sam Hocevar's avatar
 
Sam Hocevar committed
290 291
                     "aspect ratio %i:%i",
                  p_vout->output.i_width, p_vout->output.i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
292 293
                  p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
                  p_vout->output.i_aspect / i_pgcd,
Sam Hocevar's avatar
 
Sam Hocevar committed
294 295
                  VOUT_ASPECT_FACTOR / i_pgcd );

Sam Hocevar's avatar
 
Sam Hocevar committed
296 297 298 299
    /* Check whether we managed to create direct buffers similar to
     * the render buffers, ie same size, chroma and aspect ratio */
    if( ( p_vout->output.i_width == p_vout->render.i_width )
     && ( p_vout->output.i_height == p_vout->render.i_height )
Sam Hocevar's avatar
 
Sam Hocevar committed
300
     && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) )
Sam Hocevar's avatar
 
Sam Hocevar committed
301 302
     && ( p_vout->output.i_aspect == p_vout->render.i_aspect ) )
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
303 304 305 306
        /* Cool ! We have direct buffers, we can ask the decoder to
         * directly decode into them ! Map the first render buffers to
         * the first direct buffers, but keep the first direct buffer
         * for memcpy operations */
Sam Hocevar's avatar
 
Sam Hocevar committed
307 308
        p_vout->b_direct = 1;

Sam Hocevar's avatar
 
Sam Hocevar committed
309
        intf_WarnMsg( 2, "vout info: direct render, mapping "
Sam Hocevar's avatar
 
Sam Hocevar committed
310 311 312 313 314 315 316 317 318
                         "render pictures 0-%i to system pictures 1-%i",
                         VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );

        for( i = 1; i < VOUT_MAX_PICTURES; i++ )
        {
            PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
            I_RENDERPICTURES++;
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
319 320 321
    }
    else
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
322 323 324
        /* Rats... Something is wrong here, we could not find an output
         * plugin able to directly render what we decode. See if we can
         * find a chroma plugin to do the conversion */
Sam Hocevar's avatar
 
Sam Hocevar committed
325 326
        p_vout->b_direct = 0;

Sam Hocevar's avatar
 
Sam Hocevar committed
327 328
        /* Choose the best module */
        p_vout->chroma.p_module
Sam Hocevar's avatar
 
Sam Hocevar committed
329
            = module_Need( MODULE_CAPABILITY_CHROMA, NULL, (void *)p_vout );
Sam Hocevar's avatar
 
Sam Hocevar committed
330

Sam Hocevar's avatar
 
Sam Hocevar committed
331 332
        if( p_vout->chroma.p_module == NULL )
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
333 334
            intf_ErrMsg( "vout error: no chroma module for %4.4s to %4.4s",
                         &p_vout->render.i_chroma, &p_vout->output.i_chroma );
Sam Hocevar's avatar
 
Sam Hocevar committed
335 336 337 338
            p_vout->pf_end( p_vout );
            vlc_mutex_unlock( &p_vout->change_lock );
            return( 1 );
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
339

Sam Hocevar's avatar
 
Sam Hocevar committed
340 341 342 343 344 345 346 347 348 349 350 351 352 353
#define f p_vout->chroma.p_module->p_functions->chroma.functions.chroma
        p_vout->chroma.pf_init       = f.pf_init;
        p_vout->chroma.pf_end        = f.pf_end;
#undef f

        if( p_vout->chroma.pf_init( p_vout ) )
        {
            intf_ErrMsg( "vout error: could not initialize chroma module" );
            module_Unneed( p_vout->chroma.p_module );
            p_vout->pf_end( p_vout );
            vlc_mutex_unlock( &p_vout->change_lock );
            return( 1 );
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
354 355 356 357 358 359 360 361 362 363 364 365 366
        if( I_OUTPUTPICTURES < VOUT_MAX_PICTURES )
        {
            intf_WarnMsg( 2, "vout info: indirect render, mapping "
                             "render pictures %i-%i to system pictures %i-%i",
                             I_OUTPUTPICTURES - 1, VOUT_MAX_PICTURES - 2,
                             I_OUTPUTPICTURES, VOUT_MAX_PICTURES - 1 );
        }
        else
        {
            intf_WarnMsg( 2, "vout info: indirect render, no system "
                             "pictures needed, we have %i directbuffers",
                             I_OUTPUTPICTURES );
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
367 368 369 370 371 372 373 374

        /* Append render buffers after the direct buffers */
        for( i = I_OUTPUTPICTURES; i < VOUT_MAX_PICTURES; i++ )
        {
            PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
            I_RENDERPICTURES++;
        }
    }
Vincent Seguin's avatar
Vincent Seguin committed
375

Sam Hocevar's avatar
 
Sam Hocevar committed
376
    /* Mark thread as running and return */
Sam Hocevar's avatar
 
Sam Hocevar committed
377 378
    p_vout->b_active = 1;
    *p_vout->pi_status = THREAD_READY;
Sam Hocevar's avatar
 
Sam Hocevar committed
379 380 381

    intf_DbgMsg("thread ready");
    return( 0 );
Vincent Seguin's avatar
Vincent Seguin committed
382 383
}

384
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
385
 * RunThread: video output thread
386
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
387 388 389
 * Video output thread. This function does only returns when the thread is
 * terminated. It handles the pictures arriving in the video heap and the
 * display device events.
390
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
391
static void RunThread( vout_thread_t *p_vout)
Vincent Seguin's avatar
Vincent Seguin committed
392
{
Sam Hocevar's avatar
 
Sam Hocevar committed
393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409
    int             i_index;                                /* index in heap */
    mtime_t         current_date;                            /* current date */
    mtime_t         display_date;                            /* display date */

    picture_t *     p_picture;                            /* picture pointer */
    picture_t *     p_directbuffer;              /* direct buffer to display */

    subpicture_t *  p_subpic;                          /* subpicture pointer */

    /*
     * Initialize thread
     */
    p_vout->b_error = InitThread( p_vout );
    if( p_vout->b_error )
    {
        /* Destroy thread structures allocated by Create and InitThread */
        p_vout->pf_destroy( p_vout );
410

Sam Hocevar's avatar
 
Sam Hocevar committed
411 412 413
        DestroyThread( p_vout, THREAD_ERROR );
        return;
    }
414

415
    /*
Sam Hocevar's avatar
 
Sam Hocevar committed
416 417
     * Main loop - it is not executed if an error occured during
     * initialization
418
     */
Sam Hocevar's avatar
 
Sam Hocevar committed
419
    while( (!p_vout->b_die) && (!p_vout->b_error) )
420
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
421
        /* Initialize loop variables */
Sam Hocevar's avatar
 
Sam Hocevar committed
422 423
        display_date = 0;
        current_date = mdate();
Sam Hocevar's avatar
 
Sam Hocevar committed
424 425 426 427

#ifdef STATS
        p_vout->c_loops++;
        if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
428
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
429
            intf_Msg( "vout stats: picture heap: %d/%d",
Sam Hocevar's avatar
 
Sam Hocevar committed
430
                      I_RENDERPICTURES, p_vout->i_heap_size );
Sam Hocevar's avatar
 
Sam Hocevar committed
431
        }
432
#endif
Sam Hocevar's avatar
 
Sam Hocevar committed
433 434 435 436 437

        /*
         * Find the picture to display - this operation does not need lock,
         * since only READY_PICTUREs are handled
         */
Sam Hocevar's avatar
 
Sam Hocevar committed
438 439 440 441 442
        p_picture = NULL;

        for( i_index = 0;
             i_index < I_RENDERPICTURES;
             i_index++ )
Sam Hocevar's avatar
 
Sam Hocevar committed
443
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
444 445 446
            if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
                && ( (p_picture == NULL) ||
                     (PP_RENDERPICTURE[i_index]->date < display_date) ) )
447
            {
Sam Hocevar's avatar
 
Sam Hocevar committed
448
                p_picture = PP_RENDERPICTURE[i_index];
Sam Hocevar's avatar
 
Sam Hocevar committed
449
                display_date = p_picture->date;
450 451
            }
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
452 453

        if( p_picture != NULL )
454
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473
            /* Compute FPS rate */
            p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
                = display_date;

            if( display_date < current_date + p_vout->render_time )
            {
                /* Picture is late: it will be destroyed and the thread
                 * will directly choose the next picture */
                vlc_mutex_lock( &p_vout->picture_lock );
                if( p_picture->i_refcount )
                {
                    /* Pretend we displayed the picture, but don't destroy
                     * it since the decoder might still need it. */
                    p_picture->i_status = DISPLAYED_PICTURE;
                }
                else
                {
                    /* Destroy the picture without displaying it */
                    p_picture->i_status = DESTROYED_PICTURE;
Sam Hocevar's avatar
 
Sam Hocevar committed
474
                    p_vout->i_heap_size--;
Sam Hocevar's avatar
 
Sam Hocevar committed
475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490
                }
                intf_WarnMsg( 1, "vout warning: late picture skipped (%p)",
                              p_picture );
                vlc_mutex_unlock( &p_vout->picture_lock );

                continue;
            }
            else if( display_date > current_date + VOUT_DISPLAY_DELAY )
            {
                /* A picture is ready to be rendered, but its rendering date
                 * is far from the current one so the thread will perform an
                 * empty loop as if no picture were found. The picture state
                 * is unchanged */
                p_picture    = NULL;
                display_date = 0;
            }
491 492
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
493 494 495 496
        /*
         * Check for subpictures to display
         */
        p_subpic = vout_SortSubPictures( p_vout, display_date );
497

Sam Hocevar's avatar
 
Sam Hocevar committed
498 499 500 501 502
        /*
         * Perform rendering
         */
        p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );

Sam Hocevar's avatar
 
Sam Hocevar committed
503 504 505 506 507 508 509 510 511
        /*
         * Call the plugin-specific rendering method
         */
        if( p_picture != NULL )
        {
            /* Render the direct buffer returned by vout_RenderPicture */
            p_vout->pf_render( p_vout, p_directbuffer );
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
512 513 514 515
        /*
         * Sleep, wake up
         */
        if( display_date != 0 )
516
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
517 518 519
            /* Store render time using Bresenham algorithm */
            p_vout->render_time += mdate() - current_date;
            p_vout->render_time >>= 1;
520 521
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
522 523 524 525 526
        /* Give back change lock */
        vlc_mutex_unlock( &p_vout->change_lock );

        /* Sleep a while or until a given date */
        if( display_date != 0 )
Sam Hocevar's avatar
Sam Hocevar committed
527
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
528
            mwait( display_date - VOUT_MWAIT_TOLERANCE );
529 530 531
        }
        else
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
532
            msleep( VOUT_IDLE_SLEEP );
533
        }
534

Sam Hocevar's avatar
 
Sam Hocevar committed
535 536 537 538
        /* On awakening, take back lock and send immediately picture
         * to display. */
        vlc_mutex_lock( &p_vout->change_lock );

539
#ifdef TRACE_VOUT
Sam Hocevar's avatar
 
Sam Hocevar committed
540
        intf_DbgMsg( "picture %p, subpicture %p", p_picture, p_subpic );
541
#endif
Vincent Seguin's avatar
Vincent Seguin committed
542

Sam Hocevar's avatar
 
Sam Hocevar committed
543 544 545 546 547 548 549
        /*
         * Display the previously rendered picture
         */
        if( p_picture != NULL )
        {
            /* Display the direct buffer returned by vout_RenderPicture */
            p_vout->pf_display( p_vout, p_directbuffer );
Vincent Seguin's avatar
Vincent Seguin committed
550

Sam Hocevar's avatar
 
Sam Hocevar committed
551 552 553 554 555 556 557 558 559
            /* Remove picture from heap */
            vlc_mutex_lock( &p_vout->picture_lock );
            if( p_picture->i_refcount )
            {
                p_picture->i_status = DISPLAYED_PICTURE;
            }
            else
            {
                p_picture->i_status = DESTROYED_PICTURE;
Sam Hocevar's avatar
 
Sam Hocevar committed
560
                p_vout->i_heap_size--;
Sam Hocevar's avatar
 
Sam Hocevar committed
561 562 563
            }
            vlc_mutex_unlock( &p_vout->picture_lock );
        }
Vincent Seguin's avatar
Vincent Seguin committed
564

Sam Hocevar's avatar
 
Sam Hocevar committed
565 566 567 568 569 570 571 572 573 574 575
        /*
         * Check events and manage thread
         */
        if( p_vout->pf_manage( p_vout ) )
        {
            /* A fatal error occured, and the thread must terminate immediately,
             * without displaying anything - setting b_error to 1 causes the
             * immediate end of the main while() loop. */
            p_vout->b_error = 1;
        }
    }
Vincent Seguin's avatar
Vincent Seguin committed
576

Sam Hocevar's avatar
 
Sam Hocevar committed
577 578 579 580
    /*
     * Error loop - wait until the thread destruction is requested
     */
    if( p_vout->b_error )
581
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
582
        ErrorThread( p_vout );
583
    }
Michel Kaempf's avatar
Michel Kaempf committed
584

Sam Hocevar's avatar
 
Sam Hocevar committed
585 586 587 588 589 590 591 592 593
    /* End of thread */
    EndThread( p_vout );

    /* Destroy method-dependant resources */
    p_vout->pf_destroy( p_vout );

    /* Destroy thread structures allocated by CreateThread */
    DestroyThread( p_vout, THREAD_OVER );
    intf_DbgMsg( "thread end" );
Michel Kaempf's avatar
Michel Kaempf committed
594 595
}

596
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
597
 * ErrorThread: RunThread() error loop
598
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
599 600 601
 * This function is called when an error occured during thread main's loop. The
 * thread can still receive feed, but must be ready to terminate as soon as
 * possible.
602
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
603
static void ErrorThread( vout_thread_t *p_vout )
604
{
Sam Hocevar's avatar
 
Sam Hocevar committed
605 606
    /* Wait until a `die' order */
    while( !p_vout->b_die )
607
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
608 609
        /* Sleep a while */
        msleep( VOUT_IDLE_SLEEP );
610
    }
611 612
}

613
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
614
 * EndThread: thread destruction
615
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
616 617
 * This function is called when the thread ends after a sucessful
 * initialization. It frees all ressources allocated by InitThread.
618
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
619
static void EndThread( vout_thread_t *p_vout )
Michel Kaempf's avatar
Michel Kaempf committed
620
{
Sam Hocevar's avatar
 
Sam Hocevar committed
621
    int     i_index;                                        /* index in heap */
Michel Kaempf's avatar
Michel Kaempf committed
622

Sam Hocevar's avatar
 
Sam Hocevar committed
623 624
    /* Store status */
    *p_vout->pi_status = THREAD_END;
Michel Kaempf's avatar
Michel Kaempf committed
625

Sam Hocevar's avatar
 
Sam Hocevar committed
626
#ifdef STATS
Vincent Seguin's avatar
Vincent Seguin committed
627
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
628 629
        struct tms cpu_usage;
        times( &cpu_usage );
Michel Kaempf's avatar
Michel Kaempf committed
630

Sam Hocevar's avatar
 
Sam Hocevar committed
631 632
        intf_Msg( "vout stats: cpu usage (user: %d, system: %d)",
                  cpu_usage.tms_utime, cpu_usage.tms_stime );
Michel Kaempf's avatar
Michel Kaempf committed
633
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
634
#endif
Michel Kaempf's avatar
Michel Kaempf committed
635

Sam Hocevar's avatar
 
Sam Hocevar committed
636 637 638 639 640 641
    if( !p_vout->b_direct )
    {
        p_vout->chroma.pf_end( p_vout );
        module_Unneed( p_vout->chroma.p_module );
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
642
    /* Destroy all remaining pictures */
Sam Hocevar's avatar
 
Sam Hocevar committed
643
    for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++ )
Vincent Seguin's avatar
Vincent Seguin committed
644
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
645
        if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
Michel Kaempf's avatar
Michel Kaempf committed
646
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
647
            free( p_vout->p_picture[i_index].p_data );
Michel Kaempf's avatar
Michel Kaempf committed
648
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
649
    }
Michel Kaempf's avatar
Michel Kaempf committed
650

Sam Hocevar's avatar
 
Sam Hocevar committed
651 652 653 654
    /* Destroy all remaining subpictures */
    for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
    {
        if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
Vincent Seguin's avatar
Vincent Seguin committed
655
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
656
            free( p_vout->p_subpicture[i_index].p_data );
Vincent Seguin's avatar
Vincent Seguin committed
657
        }
Michel Kaempf's avatar
Michel Kaempf committed
658
    }
659

Sam Hocevar's avatar
 
Sam Hocevar committed
660 661 662 663 664
    /* Destroy translation tables */
    p_vout->pf_end( p_vout );

    /* Release the change lock */
    vlc_mutex_unlock( &p_vout->change_lock );
Michel Kaempf's avatar
Michel Kaempf committed
665 666
}

667
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
668
 * DestroyThread: thread destruction
669
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
670 671
 * This function is called when the thread ends. It frees all ressources
 * allocated by CreateThread. Status is available at this stage.
672
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
673
static void DestroyThread( vout_thread_t *p_vout, int i_status )
Michel Kaempf's avatar
Michel Kaempf committed
674
{
Sam Hocevar's avatar
 
Sam Hocevar committed
675
    int *pi_status;                                         /* status adress */
676

Sam Hocevar's avatar
 
Sam Hocevar committed
677 678
    /* Store status adress */
    pi_status = p_vout->pi_status;
679

Sam Hocevar's avatar
 
Sam Hocevar committed
680 681 682 683
    /* Destroy the locks */
    vlc_mutex_destroy( &p_vout->picture_lock );
    vlc_mutex_destroy( &p_vout->subpicture_lock );
    vlc_mutex_destroy( &p_vout->change_lock );
684

Sam Hocevar's avatar
 
Sam Hocevar committed
685 686
    /* Release the module */
    module_Unneed( p_vout->p_module );
687

Sam Hocevar's avatar
 
Sam Hocevar committed
688 689 690
    /* Free structure */
    free( p_vout );
    *pi_status = i_status;
691 692
}

Sam Hocevar's avatar
 
Sam Hocevar committed
693 694 695 696 697
static int ReduceHeight( int i_ratio )
{
    int i_dummy = VOUT_ASPECT_FACTOR;
    int i_pgcd  = 1;
 
Sam Hocevar's avatar
 
Sam Hocevar committed
698 699 700 701 702
    if( !i_ratio )
    {
        return i_pgcd;
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
703 704 705 706 707 708 709 710
    /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
    while( !(i_ratio & 1) && !(i_dummy & 1) )
    {
        i_ratio >>= 1;
        i_dummy >>= 1;
        i_pgcd  <<= 1;
    }

711
    while( !(i_ratio % 3) && !(i_dummy % 3) )
Sam Hocevar's avatar
 
Sam Hocevar committed
712 713 714 715 716 717
    {
        i_ratio /= 3;
        i_dummy /= 3;
        i_pgcd  *= 3;
    }

718
    while( !(i_ratio % 5) && !(i_dummy % 5) )
Sam Hocevar's avatar
 
Sam Hocevar committed
719 720 721 722 723 724 725 726 727
    {
        i_ratio /= 5;
        i_dummy /= 5;
        i_pgcd  *= 5;
    }

    return i_pgcd;
}