video_output.c 29.1 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
Sam Hocevar's avatar
 
Sam Hocevar committed
8
 * $Id: video_output.c,v 1.170 2002/04/04 05:08:05 sam 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

Sam Hocevar's avatar
 
Sam Hocevar committed
53
static int      ReduceHeight      ( int );
Sam Hocevar's avatar
 
Sam Hocevar committed
54 55
static int      BinaryLog         ( u32 );
static void     MaskToShift       ( int *, int *, u32 );
Gildas Bazin's avatar
 
Gildas Bazin committed
56
static void     InitWindowSize    ( vout_thread_t *, int *, int * );
Michel Kaempf's avatar
Michel Kaempf committed
57

Sam Hocevar's avatar
 
Sam Hocevar committed
58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
/*****************************************************************************
 * 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
81
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
82 83 84 85

    vlc_mutex_destroy( &p_vout_bank->lock );
}

86
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
87
 * vout_CreateThread: creates a new video output thread
88
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
89 90 91
 * 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.
92
 * If not, it will be updated using one of the THREAD_* constants.
93
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
94 95
vout_thread_t * vout_CreateThread   ( int *pi_status,
                                      int i_width, int i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
96
                                      u32 i_chroma, int i_aspect )
Michel Kaempf's avatar
Michel Kaempf committed
97
{
98 99
    vout_thread_t * p_vout;                             /* thread descriptor */
    int             i_status;                               /* thread status */
Sam Hocevar's avatar
 
Sam Hocevar committed
100
    int             i_index;                                /* loop variable */
Sam Hocevar's avatar
 
Sam Hocevar committed
101
    char          * psz_plugin;
Michel Kaempf's avatar
Michel Kaempf committed
102

103
    /* Allocate descriptor */
Michel Kaempf's avatar
Michel Kaempf committed
104
    p_vout = (vout_thread_t *) malloc( sizeof(vout_thread_t) );
105
    if( p_vout == NULL )
Michel Kaempf's avatar
Michel Kaempf committed
106
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
107 108
        intf_ErrMsg( "vout error: vout thread creation returned %s",
                     strerror(ENOMEM) );
Michel Kaempf's avatar
Michel Kaempf committed
109 110
        return( NULL );
    }
111

Sam Hocevar's avatar
 
Sam Hocevar committed
112
    /* Choose the best module */
Gildas Bazin's avatar
 
Gildas Bazin committed
113
    if( !(psz_plugin = config_GetPszVariable( "filter" )) )
Sam Hocevar's avatar
 
Sam Hocevar committed
114
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
115
        psz_plugin = config_GetPszVariable( "vout" );
Sam Hocevar's avatar
 
Sam Hocevar committed
116 117
    }

118
    /* Initialize thread properties - thread id and locks will be initialized
119
     * later */
120
    p_vout->b_die               = 0;
121
    p_vout->b_error             = 0;
122 123
    p_vout->b_active            = 0;
    p_vout->pi_status           = (pi_status != NULL) ? pi_status : &i_status;
124
    *p_vout->pi_status          = THREAD_CREATE;
125

126
    /* Initialize pictures and subpictures - translation tables and functions
127
     * will be initialized later in InitThread */
Sam Hocevar's avatar
 
Sam Hocevar committed
128
    for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
129
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
130
        p_vout->p_picture[i_index].i_status = FREE_PICTURE;
Sam Hocevar's avatar
 
Sam Hocevar committed
131
        p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
132
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
133

134 135
    for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
136
        p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
Sam Hocevar's avatar
 
Sam Hocevar committed
137
        p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
138
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
139

Sam Hocevar's avatar
 
Sam Hocevar committed
140
    /* No images in the heap */
Sam Hocevar's avatar
 
Sam Hocevar committed
141 142
    p_vout->i_heap_size = 0;

Sam Hocevar's avatar
 
Sam Hocevar committed
143
    /* Initialize the rendering heap */
Sam Hocevar's avatar
 
Sam Hocevar committed
144 145 146 147 148
    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
149

Sam Hocevar's avatar
 
Sam Hocevar committed
150 151 152 153 154 155 156 157 158 159 160 161 162 163 164
    p_vout->render.i_rmask    = 0;
    p_vout->render.i_gmask    = 0;
    p_vout->render.i_bmask    = 0;

    /* Zero the output heap */
    I_OUTPUTPICTURES = 0;
    p_vout->output.i_width    = 0;
    p_vout->output.i_height   = 0;
    p_vout->output.i_chroma   = 0;
    p_vout->output.i_aspect   = 0;

    p_vout->output.i_rmask    = 0;
    p_vout->output.i_gmask    = 0;
    p_vout->output.i_bmask    = 0;

Sam Hocevar's avatar
 
Sam Hocevar committed
165
    /* Initialize misc stuff */
Sam Hocevar's avatar
 
Sam Hocevar committed
166 167 168 169 170 171
    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
172
    p_vout->b_fullscreen = 0;
Sam Hocevar's avatar
 
Sam Hocevar committed
173
    p_vout->render_time  = 10;
Gildas Bazin's avatar
 
Gildas Bazin committed
174
    p_vout->c_fps_samples= 0;
175

Gildas Bazin's avatar
 
Gildas Bazin committed
176
    /* user requested fullscreen? */
Gildas Bazin's avatar
 
Gildas Bazin committed
177
    if( config_GetIntVariable( "fullscreen" ) )
Gildas Bazin's avatar
 
Gildas Bazin committed
178 179
        p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;

Gildas Bazin's avatar
 
Gildas Bazin committed
180 181 182 183 184
    /* Initialize the dimensions of the video window */
    InitWindowSize( p_vout, &p_vout->i_window_width,
                    &p_vout->i_window_height );


Sam Hocevar's avatar
 
Sam Hocevar committed
185 186 187
    p_vout->p_module
        = module_Need( MODULE_CAPABILITY_VOUT, psz_plugin, (void *)p_vout );

Gildas Bazin's avatar
 
Gildas Bazin committed
188
    if( psz_plugin ) free( psz_plugin );
Sam Hocevar's avatar
 
Sam Hocevar committed
189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205
    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
206
    /* Create thread and set locks */
Vincent Seguin's avatar
Vincent Seguin committed
207
    vlc_mutex_init( &p_vout->picture_lock );
208 209
    vlc_mutex_init( &p_vout->subpicture_lock );
    vlc_mutex_init( &p_vout->change_lock );
210

211 212
    if( vlc_thread_create( &p_vout->thread_id, "video output",
                           (void *) RunThread, (void *) p_vout) )
Michel Kaempf's avatar
Michel Kaempf committed
213
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
214
        intf_ErrMsg("vout error: %s", strerror(ENOMEM));
Sam Hocevar's avatar
 
Sam Hocevar committed
215
        p_vout->pf_destroy( p_vout );
Gildas Bazin's avatar
 
Gildas Bazin committed
216
        module_Unneed( p_vout->p_module );
Michel Kaempf's avatar
Michel Kaempf committed
217 218
        free( p_vout );
        return( NULL );
219
    }
Michel Kaempf's avatar
Michel Kaempf committed
220 221 222 223 224

    /* If status is NULL, wait until the thread is created */
    if( pi_status == NULL )
    {
        do
225
        {
Michel Kaempf's avatar
Michel Kaempf committed
226
            msleep( THREAD_SLEEP );
227
        }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
Michel Kaempf's avatar
Michel Kaempf committed
228 229 230
                && (i_status != THREAD_FATAL) );
        if( i_status != THREAD_READY )
        {
231 232
            return( NULL );
        }
Michel Kaempf's avatar
Michel Kaempf committed
233
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
234

Michel Kaempf's avatar
Michel Kaempf committed
235 236 237
    return( p_vout );
}

238
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
239
 * vout_DestroyThread: destroys a previously created thread
240 241
 *****************************************************************************
 * Destroy a terminated thread.
Michel Kaempf's avatar
Michel Kaempf committed
242
 * The function will request a destruction of the specified thread. If pi_error
243
 * is NULL, it will return once the thread is destroyed. Else, it will be
Michel Kaempf's avatar
Michel Kaempf committed
244
 * update using one of the THREAD_* constants.
245
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
246
void vout_DestroyThread( vout_thread_t *p_vout, int *pi_status )
247 248
{
    int     i_status;                                       /* thread status */
Michel Kaempf's avatar
Michel Kaempf committed
249 250 251

    /* Set status */
    p_vout->pi_status = (pi_status != NULL) ? pi_status : &i_status;
252 253
    *p_vout->pi_status = THREAD_DESTROY;

Michel Kaempf's avatar
Michel Kaempf committed
254 255 256 257
    /* Request thread destruction */
    p_vout->b_die = 1;

    /* If status is NULL, wait until thread has been destroyed */
258
    if( pi_status == NULL )
Michel Kaempf's avatar
Michel Kaempf committed
259 260 261 262
    {
        do
        {
            msleep( THREAD_SLEEP );
263 264
        } while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
                 && (i_status != THREAD_FATAL) );
Michel Kaempf's avatar
Michel Kaempf committed
265 266 267
    }
}

268
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
269
 * InitThread: initialize video output thread
270
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
271 272 273
 * 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.
274
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
275
static int InitThread( vout_thread_t *p_vout )
Vincent Seguin's avatar
Vincent Seguin committed
276
{
Sam Hocevar's avatar
 
Sam Hocevar committed
277
    int i, i_pgcd;
Sam Hocevar's avatar
 
Sam Hocevar committed
278

Sam Hocevar's avatar
 
Sam Hocevar committed
279 280 281 282 283 284 285
    /* 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
286 287
#endif

Sam Hocevar's avatar
 
Sam Hocevar committed
288
    /* Initialize output method, it allocates direct buffers for us */
Sam Hocevar's avatar
 
Sam Hocevar committed
289
    if( p_vout->pf_init( p_vout ) )
Vincent Seguin's avatar
Vincent Seguin committed
290
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
291 292 293 294
        vlc_mutex_unlock( &p_vout->change_lock );
        return( 1 );
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
295
    if( !I_OUTPUTPICTURES )
Sam Hocevar's avatar
 
Sam Hocevar committed
296 297 298
    {
        intf_ErrMsg( "vout error: plugin was unable to allocate at least "
                     "one direct buffer" );
Sam Hocevar's avatar
 
Sam Hocevar committed
299
        p_vout->pf_end( p_vout );
Sam Hocevar's avatar
 
Sam Hocevar committed
300 301
        vlc_mutex_unlock( &p_vout->change_lock );
        return( 1 );
302
    }
Vincent Seguin's avatar
Vincent Seguin committed
303

Sam Hocevar's avatar
 
Sam Hocevar committed
304 305 306
    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
307
    intf_WarnMsg( 1, "vout info: picture in %ix%i, chroma 0x%.8x (%4.4s), "
Sam Hocevar's avatar
 
Sam Hocevar committed
308 309
                     "aspect ratio %i:%i",
                  p_vout->render.i_width, p_vout->render.i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
310 311
                  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
312 313 314
                  VOUT_ASPECT_FACTOR / i_pgcd );

    i_pgcd = ReduceHeight( p_vout->output.i_aspect );
Sam Hocevar's avatar
 
Sam Hocevar committed
315
    intf_WarnMsg( 1, "vout info: picture out %ix%i, chroma 0x%.8x (%4.4s), "
Sam Hocevar's avatar
 
Sam Hocevar committed
316 317
                     "aspect ratio %i:%i",
                  p_vout->output.i_width, p_vout->output.i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
318 319
                  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
320 321
                  VOUT_ASPECT_FACTOR / i_pgcd );

Sam Hocevar's avatar
 
Sam Hocevar committed
322 323 324 325 326 327 328 329
    /* Calculate shifts from system-updated masks */
    MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
                 p_vout->output.i_rmask );
    MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
                 p_vout->output.i_gmask );
    MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
                 p_vout->output.i_bmask );

Sam Hocevar's avatar
 
Sam Hocevar committed
330 331 332 333
    /* 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
334
     && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) )
Sam Hocevar's avatar
 
Sam Hocevar committed
335 336
     && ( p_vout->output.i_aspect == p_vout->render.i_aspect ) )
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
337 338 339 340
        /* 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
341 342
        p_vout->b_direct = 1;

Sam Hocevar's avatar
 
Sam Hocevar committed
343
        intf_WarnMsg( 2, "vout info: direct render, mapping "
Sam Hocevar's avatar
 
Sam Hocevar committed
344 345 346 347 348 349 350 351
                         "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
352 353 354
    }
    else
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
355 356 357
        /* 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
358 359
        p_vout->b_direct = 0;

Sam Hocevar's avatar
 
Sam Hocevar committed
360 361
        /* Choose the best module */
        p_vout->chroma.p_module
Sam Hocevar's avatar
 
Sam Hocevar committed
362
            = module_Need( MODULE_CAPABILITY_CHROMA, NULL, (void *)p_vout );
Sam Hocevar's avatar
 
Sam Hocevar committed
363

Sam Hocevar's avatar
 
Sam Hocevar committed
364 365
        if( p_vout->chroma.p_module == NULL )
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
366 367
            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
368 369 370 371
            p_vout->pf_end( p_vout );
            vlc_mutex_unlock( &p_vout->change_lock );
            return( 1 );
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
372

Sam Hocevar's avatar
 
Sam Hocevar committed
373 374 375 376
#define f p_vout->chroma.p_module->p_functions->chroma.functions.chroma
        p_vout->chroma.pf_end        = f.pf_end;
#undef f

Sam Hocevar's avatar
 
Sam Hocevar committed
377
        if( I_OUTPUTPICTURES < 2 * VOUT_MAX_PICTURES )
Sam Hocevar's avatar
 
Sam Hocevar committed
378 379 380
        {
            intf_WarnMsg( 2, "vout info: indirect render, mapping "
                             "render pictures %i-%i to system pictures %i-%i",
Sam Hocevar's avatar
 
Sam Hocevar committed
381 382
                             I_OUTPUTPICTURES - 1, 2 * VOUT_MAX_PICTURES - 2,
                             I_OUTPUTPICTURES, 2 * VOUT_MAX_PICTURES - 1 );
Sam Hocevar's avatar
 
Sam Hocevar committed
383 384 385
        }
        else
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
386
            /* FIXME: if this happens, we don't have any render picture left */
Sam Hocevar's avatar
 
Sam Hocevar committed
387 388 389
            intf_WarnMsg( 2, "vout info: indirect render, no system "
                             "pictures needed, we have %i directbuffers",
                             I_OUTPUTPICTURES );
Sam Hocevar's avatar
 
Sam Hocevar committed
390
            intf_ErrMsg( "vout: this is a bug!\n");
Sam Hocevar's avatar
 
Sam Hocevar committed
391
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
392 393

        /* Append render buffers after the direct buffers */
Sam Hocevar's avatar
 
Sam Hocevar committed
394
        for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
Sam Hocevar's avatar
 
Sam Hocevar committed
395 396 397 398 399
        {
            PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
            I_RENDERPICTURES++;
        }
    }
Vincent Seguin's avatar
Vincent Seguin committed
400

Sam Hocevar's avatar
 
Sam Hocevar committed
401 402 403 404 405 406 407 408 409 410 411
    /* Link pictures back to their heap */
    for( i = 0 ; i < I_RENDERPICTURES ; i++ )
    {
        PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
    }

    for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
    {
        PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
412
    /* Mark thread as running and return */
Sam Hocevar's avatar
 
Sam Hocevar committed
413 414
    p_vout->b_active = 1;
    *p_vout->pi_status = THREAD_READY;
Sam Hocevar's avatar
 
Sam Hocevar committed
415 416

    return( 0 );
Vincent Seguin's avatar
Vincent Seguin committed
417 418
}

419
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
420
 * RunThread: video output thread
421
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
422 423 424
 * 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.
425
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
426
static void RunThread( vout_thread_t *p_vout)
Vincent Seguin's avatar
Vincent Seguin committed
427
{
Sam Hocevar's avatar
 
Sam Hocevar committed
428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444
    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 );
445

Sam Hocevar's avatar
 
Sam Hocevar committed
446 447 448
        DestroyThread( p_vout, THREAD_ERROR );
        return;
    }
449

450
    /*
Sam Hocevar's avatar
 
Sam Hocevar committed
451 452
     * Main loop - it is not executed if an error occured during
     * initialization
453
     */
Sam Hocevar's avatar
 
Sam Hocevar committed
454
    while( (!p_vout->b_die) && (!p_vout->b_error) )
455
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
456
        /* Initialize loop variables */
Sam Hocevar's avatar
 
Sam Hocevar committed
457 458
        display_date = 0;
        current_date = mdate();
Sam Hocevar's avatar
 
Sam Hocevar committed
459 460 461 462

#ifdef STATS
        p_vout->c_loops++;
        if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
463
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
464
            intf_Msg( "vout stats: picture heap: %d/%d",
Sam Hocevar's avatar
 
Sam Hocevar committed
465
                      I_RENDERPICTURES, p_vout->i_heap_size );
Sam Hocevar's avatar
 
Sam Hocevar committed
466
        }
467
#endif
Sam Hocevar's avatar
 
Sam Hocevar committed
468 469 470 471 472

        /*
         * Find the picture to display - this operation does not need lock,
         * since only READY_PICTUREs are handled
         */
Sam Hocevar's avatar
 
Sam Hocevar committed
473 474 475 476 477
        p_picture = NULL;

        for( i_index = 0;
             i_index < I_RENDERPICTURES;
             i_index++ )
Sam Hocevar's avatar
 
Sam Hocevar committed
478
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
479 480 481
            if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
                && ( (p_picture == NULL) ||
                     (PP_RENDERPICTURE[i_index]->date < display_date) ) )
482
            {
Sam Hocevar's avatar
 
Sam Hocevar committed
483
                p_picture = PP_RENDERPICTURE[i_index];
Sam Hocevar's avatar
 
Sam Hocevar committed
484
                display_date = p_picture->date;
485 486
            }
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
487 488

        if( p_picture != NULL )
489
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508
            /* 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
509
                    p_vout->i_heap_size--;
Sam Hocevar's avatar
 
Sam Hocevar committed
510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
                }
                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;
            }
526 527
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
528 529 530 531
        /*
         * Check for subpictures to display
         */
        p_subpic = vout_SortSubPictures( p_vout, display_date );
532

Sam Hocevar's avatar
 
Sam Hocevar committed
533 534 535 536 537
        /*
         * Perform rendering
         */
        p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );

Sam Hocevar's avatar
 
Sam Hocevar committed
538 539 540 541 542 543 544 545 546
        /*
         * 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
547 548 549 550
        /*
         * Sleep, wake up
         */
        if( display_date != 0 )
551
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
552 553 554
            /* Store render time using Bresenham algorithm */
            p_vout->render_time += mdate() - current_date;
            p_vout->render_time >>= 1;
555 556
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
557 558 559 560 561
        /* 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
562
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
563
            mwait( display_date - VOUT_MWAIT_TOLERANCE );
564 565 566
        }
        else
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
567
            msleep( VOUT_IDLE_SLEEP );
568
        }
569

Sam Hocevar's avatar
 
Sam Hocevar committed
570 571 572 573 574 575 576 577 578 579 580
        /* On awakening, take back lock and send immediately picture
         * to display. */
        vlc_mutex_lock( &p_vout->change_lock );

        /*
         * 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
581

Sam Hocevar's avatar
 
Sam Hocevar committed
582 583 584 585 586 587 588 589 590
            /* 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
591
                p_vout->i_heap_size--;
Sam Hocevar's avatar
 
Sam Hocevar committed
592 593 594
            }
            vlc_mutex_unlock( &p_vout->picture_lock );
        }
Vincent Seguin's avatar
Vincent Seguin committed
595

Sam Hocevar's avatar
 
Sam Hocevar committed
596 597 598 599 600 601 602 603 604 605 606
        /*
         * 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
607

Sam Hocevar's avatar
 
Sam Hocevar committed
608 609 610 611
    /*
     * Error loop - wait until the thread destruction is requested
     */
    if( p_vout->b_error )
612
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
613
        ErrorThread( p_vout );
614
    }
Michel Kaempf's avatar
Michel Kaempf committed
615

Sam Hocevar's avatar
 
Sam Hocevar committed
616 617 618 619 620 621 622 623
    /* 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 );
Michel Kaempf's avatar
Michel Kaempf committed
624 625
}

626
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
627
 * ErrorThread: RunThread() error loop
628
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
629 630 631
 * 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.
632
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
633
static void ErrorThread( vout_thread_t *p_vout )
634
{
Sam Hocevar's avatar
 
Sam Hocevar committed
635 636
    /* Wait until a `die' order */
    while( !p_vout->b_die )
637
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
638 639
        /* Sleep a while */
        msleep( VOUT_IDLE_SLEEP );
640
    }
641 642
}

643
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
644
 * EndThread: thread destruction
645
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
646 647
 * This function is called when the thread ends after a sucessful
 * initialization. It frees all ressources allocated by InitThread.
648
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
649
static void EndThread( vout_thread_t *p_vout )
Michel Kaempf's avatar
Michel Kaempf committed
650
{
Sam Hocevar's avatar
 
Sam Hocevar committed
651
    int     i_index;                                        /* index in heap */
Michel Kaempf's avatar
Michel Kaempf committed
652

Sam Hocevar's avatar
 
Sam Hocevar committed
653 654
    /* Store status */
    *p_vout->pi_status = THREAD_END;
Michel Kaempf's avatar
Michel Kaempf committed
655

Sam Hocevar's avatar
 
Sam Hocevar committed
656
#ifdef STATS
Vincent Seguin's avatar
Vincent Seguin committed
657
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
658 659
        struct tms cpu_usage;
        times( &cpu_usage );
Michel Kaempf's avatar
Michel Kaempf committed
660

Sam Hocevar's avatar
 
Sam Hocevar committed
661 662
        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
663
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
664
#endif
Michel Kaempf's avatar
Michel Kaempf committed
665

Sam Hocevar's avatar
 
Sam Hocevar committed
666 667 668 669 670 671
    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
672
    /* Destroy all remaining pictures */
Sam Hocevar's avatar
 
Sam Hocevar committed
673
    for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
Vincent Seguin's avatar
Vincent Seguin committed
674
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
675
        if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
Michel Kaempf's avatar
Michel Kaempf committed
676
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
677
            free( p_vout->p_picture[i_index].p_data );
Michel Kaempf's avatar
Michel Kaempf committed
678
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
679
    }
Michel Kaempf's avatar
Michel Kaempf committed
680

Sam Hocevar's avatar
 
Sam Hocevar committed
681 682 683 684
    /* 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
685
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
686
            free( p_vout->p_subpicture[i_index].p_sys );
Vincent Seguin's avatar
Vincent Seguin committed
687
        }
Michel Kaempf's avatar
Michel Kaempf committed
688
    }
689

Sam Hocevar's avatar
 
Sam Hocevar committed
690 691 692 693 694
    /* 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
695 696
}

697
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
698
 * DestroyThread: thread destruction
699
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
700 701
 * This function is called when the thread ends. It frees all ressources
 * allocated by CreateThread. Status is available at this stage.
702
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
703
static void DestroyThread( vout_thread_t *p_vout, int i_status )
Michel Kaempf's avatar
Michel Kaempf committed
704
{
Sam Hocevar's avatar
 
Sam Hocevar committed
705
    int *pi_status;                                         /* status adress */
706

Sam Hocevar's avatar
 
Sam Hocevar committed
707 708
    /* Store status adress */
    pi_status = p_vout->pi_status;
709

Sam Hocevar's avatar
 
Sam Hocevar committed
710 711 712 713
    /* Destroy the locks */
    vlc_mutex_destroy( &p_vout->picture_lock );
    vlc_mutex_destroy( &p_vout->subpicture_lock );
    vlc_mutex_destroy( &p_vout->change_lock );
714

Sam Hocevar's avatar
 
Sam Hocevar committed
715 716
    /* Release the module */
    module_Unneed( p_vout->p_module );
717

Sam Hocevar's avatar
 
Sam Hocevar committed
718 719 720
    /* Free structure */
    free( p_vout );
    *pi_status = i_status;
721 722
}

Sam Hocevar's avatar
 
Sam Hocevar committed
723 724
/* following functions are local */

Sam Hocevar's avatar
 
Sam Hocevar committed
725 726 727 728 729
static int ReduceHeight( int i_ratio )
{
    int i_dummy = VOUT_ASPECT_FACTOR;
    int i_pgcd  = 1;
 
Sam Hocevar's avatar
 
Sam Hocevar committed
730 731 732 733 734
    if( !i_ratio )
    {
        return i_pgcd;
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
735 736 737 738 739 740 741 742
    /* 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;
    }

743
    while( !(i_ratio % 3) && !(i_dummy % 3) )
Sam Hocevar's avatar
 
Sam Hocevar committed
744 745 746 747 748 749
    {
        i_ratio /= 3;
        i_dummy /= 3;
        i_pgcd  *= 3;
    }

750
    while( !(i_ratio % 5) && !(i_dummy % 5) )
Sam Hocevar's avatar
 
Sam Hocevar committed
751 752 753 754 755 756 757 758 759
    {
        i_ratio /= 5;
        i_dummy /= 5;
        i_pgcd  *= 5;
    }

    return i_pgcd;
}

Sam Hocevar's avatar
 
Sam Hocevar committed
760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811
/*****************************************************************************
 * BinaryLog: computes the base 2 log of a binary value
 *****************************************************************************
 * This functions is used by MaskToShift, to get a bit index from a binary
 * value.
 *****************************************************************************/
static int BinaryLog(u32 i)
{
    int i_log = 0;

    if(i & 0xffff0000) i_log += 16;
    if(i & 0xff00ff00) i_log += 8;
    if(i & 0xf0f0f0f0) i_log += 4;
    if(i & 0xcccccccc) i_log += 2;
    if(i & 0xaaaaaaaa) i_log += 1;

    if (i != ((u32)1 << i_log))
    {
        intf_ErrMsg( "vout error: binary log overflow for %i", i );
    }

    return( i_log );
}

/*****************************************************************************
 * MaskToShift: transform a color mask into right and left shifts
 *****************************************************************************
 * This function is used for obtaining color shifts from masks.
 *****************************************************************************/
static void MaskToShift( int *pi_left, int *pi_right, u32 i_mask )
{
    u32 i_low, i_high;                 /* lower hand higher bits of the mask */

    if( !i_mask )
    {
        *pi_left = *pi_right = 0;
        return;
    }

    /* Get bits */
    i_low =  i_mask & (- i_mask);                   /* lower bit of the mask */
    i_high = i_mask + i_low;                       /* higher bit of the mask */

    /* Transform bits into an index */
    i_low =  BinaryLog (i_low);
    i_high = BinaryLog (i_high);

    /* Update pointers and return */
    *pi_left =   i_low;
    *pi_right = (8 - i_high + i_low);
}

Gildas Bazin's avatar
 
Gildas Bazin committed
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
/*****************************************************************************
 * InitWindowSize: find the initial dimensions the video window should have.
 *****************************************************************************
 * This function will check the "width" and "height" config options and
 * will calculate the size that the video window should have.
 *****************************************************************************/
static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
                            int *pi_height )
{
    int i_width, i_height;

    i_width = config_GetIntVariable( "width" );
    i_height = config_GetIntVariable( "height" );

    if( (i_width >= 0) && (i_height >= 0))
    {
        *pi_width = i_width;
        *pi_height = i_height;
        return;
    }
    else if( i_width >= 0 )
    {
        *pi_width = i_width;
        *pi_height = i_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
        return;
    }
    else if( i_height >= 0 )
    {
        *pi_height = i_height;
        *pi_width = i_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
        return;
    }

    if( p_vout->render.i_height * p_vout->render.i_aspect
        >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
    {
        *pi_width = p_vout->render.i_height
          * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
        *pi_height = p_vout->render.i_height;
    }
    else
    {
        *pi_width = p_vout->render.i_width;
        *pi_height = p_vout->render.i_width
          * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
    }
}