video_output.c 32.9 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
Christophe Massiot's avatar
Christophe Massiot committed
8
 * $Id: video_output.c,v 1.177 2002/05/19 23:51:37 massiot 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
    }
}

268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329
/*****************************************************************************
 * vout_ChromaCmp: compare two chroma values
 *****************************************************************************
 * This function returns 1 if the two fourcc values given as argument are
 * the same format (eg. UYVY / UYNV) or almost the same format (eg. I420/YV12)
 *****************************************************************************/
int vout_ChromaCmp( u32 i_chroma, u32 i_amorhc )
{
    /* If they are the same, they are the same ! */
    if( i_chroma == i_amorhc )
    {
        return 1;
    }

    /* Check for equivalence classes */
    switch( i_chroma )
    {
        case FOURCC_I420:
        case FOURCC_IYUV:
        case FOURCC_YV12:
            switch( i_amorhc )
            {
                case FOURCC_I420:
                case FOURCC_IYUV:
                case FOURCC_YV12:
                    return 1;

                default:
                    return 0;
            }

        case FOURCC_UYVY:
        case FOURCC_UYNV:
        case FOURCC_Y422:
            switch( i_amorhc )
            {
                case FOURCC_UYVY:
                case FOURCC_UYNV:
                case FOURCC_Y422:
                    return 1;

                default:
                    return 0;
            }

        case FOURCC_YUY2:
        case FOURCC_YUNV:
            switch( i_amorhc )
            {
                case FOURCC_YUY2:
                case FOURCC_YUNV:
                    return 1;

                default:
                    return 0;
            }

        default:
            return 0;
    }
}

330
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
331
 * InitThread: initialize video output thread
332
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
333 334 335
 * 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.
336
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
337
static int InitThread( vout_thread_t *p_vout )
Vincent Seguin's avatar
Vincent Seguin committed
338
{
Sam Hocevar's avatar
 
Sam Hocevar committed
339
    int i, i_pgcd;
Sam Hocevar's avatar
 
Sam Hocevar committed
340

Sam Hocevar's avatar
 
Sam Hocevar committed
341 342 343 344 345 346 347
    /* 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
348 349
#endif

Sam Hocevar's avatar
 
Sam Hocevar committed
350
    /* Initialize output method, it allocates direct buffers for us */
Sam Hocevar's avatar
 
Sam Hocevar committed
351
    if( p_vout->pf_init( p_vout ) )
Vincent Seguin's avatar
Vincent Seguin committed
352
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
353 354 355 356
        vlc_mutex_unlock( &p_vout->change_lock );
        return( 1 );
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
357
    if( !I_OUTPUTPICTURES )
Sam Hocevar's avatar
 
Sam Hocevar committed
358 359 360
    {
        intf_ErrMsg( "vout error: plugin was unable to allocate at least "
                     "one direct buffer" );
Sam Hocevar's avatar
 
Sam Hocevar committed
361
        p_vout->pf_end( p_vout );
Sam Hocevar's avatar
 
Sam Hocevar committed
362 363
        vlc_mutex_unlock( &p_vout->change_lock );
        return( 1 );
364
    }
Vincent Seguin's avatar
Vincent Seguin committed
365

Sam Hocevar's avatar
 
Sam Hocevar committed
366 367 368
    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
369
    intf_WarnMsg( 1, "vout info: picture in %ix%i, chroma 0x%.8x (%4.4s), "
Sam Hocevar's avatar
 
Sam Hocevar committed
370 371
                     "aspect ratio %i:%i",
                  p_vout->render.i_width, p_vout->render.i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
372 373
                  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
374 375 376
                  VOUT_ASPECT_FACTOR / i_pgcd );

    i_pgcd = ReduceHeight( p_vout->output.i_aspect );
Sam Hocevar's avatar
 
Sam Hocevar committed
377
    intf_WarnMsg( 1, "vout info: picture out %ix%i, chroma 0x%.8x (%4.4s), "
Sam Hocevar's avatar
 
Sam Hocevar committed
378 379
                     "aspect ratio %i:%i",
                  p_vout->output.i_width, p_vout->output.i_height,
Sam Hocevar's avatar
 
Sam Hocevar committed
380 381
                  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
382 383
                  VOUT_ASPECT_FACTOR / i_pgcd );

Sam Hocevar's avatar
 
Sam Hocevar committed
384 385 386 387 388 389 390 391
    /* 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
392 393 394 395
    /* 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
396
     && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) )
Sam Hocevar's avatar
 
Sam Hocevar committed
397 398
     && ( p_vout->output.i_aspect == p_vout->render.i_aspect ) )
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
399 400 401 402
        /* 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
403 404
        p_vout->b_direct = 1;

Sam Hocevar's avatar
 
Sam Hocevar committed
405
        intf_WarnMsg( 2, "vout info: direct render, mapping "
Sam Hocevar's avatar
 
Sam Hocevar committed
406 407 408 409 410 411 412 413
                         "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
414 415 416
    }
    else
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
417 418 419
        /* 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
420 421
        p_vout->b_direct = 0;

Sam Hocevar's avatar
 
Sam Hocevar committed
422 423
        /* Choose the best module */
        p_vout->chroma.p_module
Sam Hocevar's avatar
 
Sam Hocevar committed
424
            = module_Need( MODULE_CAPABILITY_CHROMA, NULL, (void *)p_vout );
Sam Hocevar's avatar
 
Sam Hocevar committed
425

Sam Hocevar's avatar
 
Sam Hocevar committed
426 427
        if( p_vout->chroma.p_module == NULL )
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
428 429
            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
430 431 432 433
            p_vout->pf_end( p_vout );
            vlc_mutex_unlock( &p_vout->change_lock );
            return( 1 );
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
434

Sam Hocevar's avatar
 
Sam Hocevar committed
435
#define f p_vout->chroma.p_module->p_functions->chroma.functions.chroma
Gildas Bazin's avatar
 
Gildas Bazin committed
436
        p_vout->chroma.pf_init       = f.pf_init;
Sam Hocevar's avatar
 
Sam Hocevar committed
437 438 439
        p_vout->chroma.pf_end        = f.pf_end;
#undef f

Sam Hocevar's avatar
 
Sam Hocevar committed
440
        if( I_OUTPUTPICTURES < 2 * VOUT_MAX_PICTURES )
Sam Hocevar's avatar
 
Sam Hocevar committed
441 442 443
        {
            intf_WarnMsg( 2, "vout info: indirect render, mapping "
                             "render pictures %i-%i to system pictures %i-%i",
Sam Hocevar's avatar
 
Sam Hocevar committed
444 445
                             I_OUTPUTPICTURES - 1, 2 * VOUT_MAX_PICTURES - 2,
                             I_OUTPUTPICTURES, 2 * VOUT_MAX_PICTURES - 1 );
Sam Hocevar's avatar
 
Sam Hocevar committed
446 447 448
        }
        else
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
449
            /* FIXME: if this happens, we don't have any render picture left */
Sam Hocevar's avatar
 
Sam Hocevar committed
450 451 452
            intf_WarnMsg( 2, "vout info: indirect render, no system "
                             "pictures needed, we have %i directbuffers",
                             I_OUTPUTPICTURES );
Sam Hocevar's avatar
 
Sam Hocevar committed
453
            intf_ErrMsg( "vout: this is a bug!\n");
Sam Hocevar's avatar
 
Sam Hocevar committed
454
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
455 456

        /* Append render buffers after the direct buffers */
Sam Hocevar's avatar
 
Sam Hocevar committed
457
        for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
Sam Hocevar's avatar
 
Sam Hocevar committed
458 459 460 461 462
        {
            PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
            I_RENDERPICTURES++;
        }
    }
Vincent Seguin's avatar
Vincent Seguin committed
463

Sam Hocevar's avatar
 
Sam Hocevar committed
464 465 466 467 468 469 470 471 472 473 474
    /* 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
475
    /* Mark thread as running and return */
Sam Hocevar's avatar
 
Sam Hocevar committed
476 477
    p_vout->b_active = 1;
    *p_vout->pi_status = THREAD_READY;
Sam Hocevar's avatar
 
Sam Hocevar committed
478 479

    return( 0 );
Vincent Seguin's avatar
Vincent Seguin committed
480 481
}

482
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
483
 * RunThread: video output thread
484
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
485 486 487
 * 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.
488
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
489
static void RunThread( vout_thread_t *p_vout)
Vincent Seguin's avatar
Vincent Seguin committed
490
{
Sam Hocevar's avatar
 
Sam Hocevar committed
491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507
    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 );
508

Sam Hocevar's avatar
 
Sam Hocevar committed
509 510 511
        DestroyThread( p_vout, THREAD_ERROR );
        return;
    }
512

513
    /*
Sam Hocevar's avatar
 
Sam Hocevar committed
514 515
     * Main loop - it is not executed if an error occured during
     * initialization
516
     */
Sam Hocevar's avatar
 
Sam Hocevar committed
517
    while( (!p_vout->b_die) && (!p_vout->b_error) )
518
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
519
        /* Initialize loop variables */
Sam Hocevar's avatar
 
Sam Hocevar committed
520 521
        display_date = 0;
        current_date = mdate();
Sam Hocevar's avatar
 
Sam Hocevar committed
522 523 524 525

#ifdef STATS
        p_vout->c_loops++;
        if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
526
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
527
            intf_Msg( "vout stats: picture heap: %d/%d",
Sam Hocevar's avatar
 
Sam Hocevar committed
528
                      I_RENDERPICTURES, p_vout->i_heap_size );
Sam Hocevar's avatar
 
Sam Hocevar committed
529
        }
530
#endif
Sam Hocevar's avatar
 
Sam Hocevar committed
531 532 533 534 535

        /*
         * Find the picture to display - this operation does not need lock,
         * since only READY_PICTUREs are handled
         */
Sam Hocevar's avatar
 
Sam Hocevar committed
536 537 538 539 540
        p_picture = NULL;

        for( i_index = 0;
             i_index < I_RENDERPICTURES;
             i_index++ )
Sam Hocevar's avatar
 
Sam Hocevar committed
541
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
542 543 544
            if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
                && ( (p_picture == NULL) ||
                     (PP_RENDERPICTURE[i_index]->date < display_date) ) )
545
            {
Sam Hocevar's avatar
 
Sam Hocevar committed
546
                p_picture = PP_RENDERPICTURE[i_index];
Sam Hocevar's avatar
 
Sam Hocevar committed
547
                display_date = p_picture->date;
548 549
            }
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
550 551

        if( p_picture != NULL )
552
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571
            /* 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
572
                    p_vout->i_heap_size--;
Sam Hocevar's avatar
 
Sam Hocevar committed
573
                }
574 575 576 577 578 579
                intf_WarnMsg( 1, "vout warning: late picture skipped (%lld)",
                              current_date - display_date );
                vlc_mutex_unlock( &p_vout->picture_lock );

                continue;
            }
Christophe Massiot's avatar
Christophe Massiot committed
580 581
#if 0
            /* Removed because it causes problems for some people --Meuuh */
582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599
            else if( display_date > current_date + VOUT_BOGUS_DELAY )
            {
                /* Picture is waaay too early: it will be destroyed */
                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;
                    p_vout->i_heap_size--;
                }
                intf_WarnMsg( 1, "vout warning: early picture skipped (%lld)",
                              display_date - current_date );
Sam Hocevar's avatar
 
Sam Hocevar committed
600 601 602 603
                vlc_mutex_unlock( &p_vout->picture_lock );

                continue;
            }
Christophe Massiot's avatar
Christophe Massiot committed
604
#endif
Sam Hocevar's avatar
 
Sam Hocevar committed
605 606 607 608 609 610 611 612 613
            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;
            }
614 615
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
616 617 618 619
        /*
         * Check for subpictures to display
         */
        p_subpic = vout_SortSubPictures( p_vout, display_date );
620

Sam Hocevar's avatar
 
Sam Hocevar committed
621 622 623 624 625
        /*
         * Perform rendering
         */
        p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );

Sam Hocevar's avatar
 
Sam Hocevar committed
626 627 628 629 630 631 632 633 634
        /*
         * 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
635 636 637 638
        /*
         * Sleep, wake up
         */
        if( display_date != 0 )
639
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
640 641 642
            /* Store render time using Bresenham algorithm */
            p_vout->render_time += mdate() - current_date;
            p_vout->render_time >>= 1;
643 644
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
645 646 647 648 649
        /* 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
650
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
651
            mwait( display_date - VOUT_MWAIT_TOLERANCE );
652 653 654
        }
        else
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
655
            msleep( VOUT_IDLE_SLEEP );
656
        }
657

Sam Hocevar's avatar
 
Sam Hocevar committed
658 659 660 661 662 663 664 665 666 667 668
        /* 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
669

Sam Hocevar's avatar
 
Sam Hocevar committed
670 671 672 673 674 675 676 677 678
            /* 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
679
                p_vout->i_heap_size--;
Sam Hocevar's avatar
 
Sam Hocevar committed
680 681 682
            }
            vlc_mutex_unlock( &p_vout->picture_lock );
        }
Vincent Seguin's avatar
Vincent Seguin committed
683

Sam Hocevar's avatar
 
Sam Hocevar committed
684 685 686 687 688
        /*
         * Check events and manage thread
         */
        if( p_vout->pf_manage( p_vout ) )
        {
Gildas Bazin's avatar
 
Gildas Bazin committed
689 690 691
            /* 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. */
Sam Hocevar's avatar
 
Sam Hocevar committed
692 693
            p_vout->b_error = 1;
        }
Gildas Bazin's avatar
 
Gildas Bazin committed
694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721

        if( p_vout->i_changes & VOUT_SIZE_CHANGE )
        {
            /* this must only happen when the vout plugin is incapable of
             * rescaling the picture itself. In this case we need to destroy
             * the current picture buffers and recreate new ones with the right
             * dimensions */
            int i;

            p_vout->i_changes &= ~VOUT_SIZE_CHANGE;

            p_vout->pf_end( p_vout );
            for( i = 0; i < I_OUTPUTPICTURES; i++ )
                 p_vout->p_picture[ i ].i_status = FREE_PICTURE;

            I_OUTPUTPICTURES = 0;
            if( p_vout->pf_init( p_vout ) )
            {
                intf_ErrMsg( "vout error: cannot resize display" );
                /* FixMe: p_vout->pf_end will be called again in EndThread() */
                p_vout->b_error = 1;
            }

            /* Need to reinitialise the chroma plugin */
            p_vout->chroma.pf_end( p_vout );
            p_vout->chroma.pf_init( p_vout );
        }

Sam Hocevar's avatar
 
Sam Hocevar committed
722
    }
Vincent Seguin's avatar
Vincent Seguin committed
723

Sam Hocevar's avatar
 
Sam Hocevar committed
724 725 726 727
    /*
     * Error loop - wait until the thread destruction is requested
     */
    if( p_vout->b_error )
728
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
729
        ErrorThread( p_vout );
730
    }
Michel Kaempf's avatar
Michel Kaempf committed
731

Sam Hocevar's avatar
 
Sam Hocevar committed
732 733 734 735 736 737 738 739
    /* 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
740 741
}

742
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
743
 * ErrorThread: RunThread() error loop
744
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
745 746 747
 * 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.
748
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
749
static void ErrorThread( vout_thread_t *p_vout )
750
{
Sam Hocevar's avatar
 
Sam Hocevar committed
751 752
    /* Wait until a `die' order */
    while( !p_vout->b_die )
753
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
754 755
        /* Sleep a while */
        msleep( VOUT_IDLE_SLEEP );
756
    }
757 758
}

759
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
760
 * EndThread: thread destruction
761
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
762 763
 * This function is called when the thread ends after a sucessful
 * initialization. It frees all ressources allocated by InitThread.
764
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
765
static void EndThread( vout_thread_t *p_vout )
Michel Kaempf's avatar
Michel Kaempf committed
766
{
Sam Hocevar's avatar
 
Sam Hocevar committed
767
    int     i_index;                                        /* index in heap */
Michel Kaempf's avatar
Michel Kaempf committed
768

Sam Hocevar's avatar
 
Sam Hocevar committed
769 770
    /* Store status */
    *p_vout->pi_status = THREAD_END;
Michel Kaempf's avatar
Michel Kaempf committed
771

Sam Hocevar's avatar
 
Sam Hocevar committed
772
#ifdef STATS
Vincent Seguin's avatar
Vincent Seguin committed
773
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
774 775
        struct tms cpu_usage;
        times( &cpu_usage );
Michel Kaempf's avatar
Michel Kaempf committed
776

Sam Hocevar's avatar
 
Sam Hocevar committed
777 778
        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
779
    }
Sam Hocevar's avatar
 
Sam Hocevar committed
780
#endif
Michel Kaempf's avatar
Michel Kaempf committed
781

Sam Hocevar's avatar
 
Sam Hocevar committed
782 783 784 785 786 787
    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
788
    /* Destroy all remaining pictures */
Sam Hocevar's avatar
 
Sam Hocevar committed
789
    for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
Vincent Seguin's avatar
Vincent Seguin committed
790
    {
Sam Hocevar's avatar
 
Sam Hocevar committed
791
        if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
Michel Kaempf's avatar
Michel Kaempf committed
792
        {
Gildas Bazin's avatar
 
Gildas Bazin committed
793
            free( p_vout->p_picture[i_index].p_data_orig );
Michel Kaempf's avatar
Michel Kaempf committed
794
        }
Sam Hocevar's avatar
 
Sam Hocevar committed
795
    }
Michel Kaempf's avatar
Michel Kaempf committed
796

Sam Hocevar's avatar
 
Sam Hocevar committed
797 798 799 800
    /* 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
801
        {
Sam Hocevar's avatar
 
Sam Hocevar committed
802
            free( p_vout->p_subpicture[i_index].p_sys );
Vincent Seguin's avatar
Vincent Seguin committed
803
        }
Michel Kaempf's avatar
Michel Kaempf committed
804
    }
805

Sam Hocevar's avatar
 
Sam Hocevar committed
806 807 808 809 810
    /* 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
811 812
}

813
/*****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
814
 * DestroyThread: thread destruction
815
 *****************************************************************************
Sam Hocevar's avatar
 
Sam Hocevar committed
816 817
 * This function is called when the thread ends. It frees all ressources
 * allocated by CreateThread. Status is available at this stage.
818
 *****************************************************************************/
Sam Hocevar's avatar
 
Sam Hocevar committed
819
static void DestroyThread( vout_thread_t *p_vout, int i_status )
Michel Kaempf's avatar
Michel Kaempf committed
820
{
Sam Hocevar's avatar
 
Sam Hocevar committed
821
    int *pi_status;                                         /* status adress */
822

Sam Hocevar's avatar
 
Sam Hocevar committed
823 824
    /* Store status adress */
    pi_status = p_vout->pi_status;
825

Sam Hocevar's avatar
 
Sam Hocevar committed
826 827 828 829
    /* Destroy the locks */
    vlc_mutex_destroy( &p_vout->picture_lock );
    vlc_mutex_destroy( &p_vout->subpicture_lock );
    vlc_mutex_destroy( &p_vout->change_lock );
830

Sam Hocevar's avatar
 
Sam Hocevar committed
831 832
    /* Release the module */
    module_Unneed( p_vout->p_module );
833

Sam Hocevar's avatar
 
Sam Hocevar committed
834 835 836
    /* Free structure */
    free( p_vout );
    *pi_status = i_status;
837 838
}

Sam Hocevar's avatar
 
Sam Hocevar committed
839 840
/* following functions are local */

Sam Hocevar's avatar
 
Sam Hocevar committed
841 842 843 844 845
static int ReduceHeight( int i_ratio )
{
    int i_dummy = VOUT_ASPECT_FACTOR;
    int i_pgcd  = 1;
 
Sam Hocevar's avatar
 
Sam Hocevar committed
846 847 848 849 850
    if( !i_ratio )
    {
        return i_pgcd;
    }

Sam Hocevar's avatar
 
Sam Hocevar committed
851 852 853 854 855 856 857 858
    /* 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;
    }

859
    while( !(i_ratio % 3) && !(i_dummy % 3) )
Sam Hocevar's avatar
 
Sam Hocevar committed
860 861 862 863 864 865
    {
        i_ratio /= 3;
        i_dummy /= 3;
        i_pgcd  *= 3;
    }

866
    while( !(i_ratio % 5) && !(i_dummy % 5) )
Sam Hocevar's avatar
 
Sam Hocevar committed
867 868 869 870 871 872 873 874 875
    {
        i_ratio /= 5;
        i_dummy /= 5;
        i_pgcd  *= 5;
    }

    return i_pgcd;
}

Sam Hocevar's avatar
 
Sam Hocevar committed
876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927
/*****************************************************************************
 * 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
928 929 930
/*****************************************************************************
 * InitWindowSize: find the initial dimensions the video window should have.
 *****************************************************************************
Gildas Bazin's avatar
 
Gildas Bazin committed
931
 * This function will check the "width", "height" and "zoom" config options and
Gildas Bazin's avatar
 
Gildas Bazin committed
932 933 934 935 936 937
 * 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;
Gildas Bazin's avatar
 
Gildas Bazin committed
938
    double f_zoom;
Gildas Bazin's avatar
 
Gildas Bazin committed
939 940 941

    i_width = config_GetIntVariable( "width" );
    i_height = config_GetIntVariable( "height" );
Gildas Bazin's avatar
 
Gildas Bazin committed
942
    f_zoom = config_GetFloatVariable( "zoom" );
Gildas Bazin's avatar
 
Gildas Bazin committed
943 944 945

    if( (i_width >= 0) && (i_height >= 0))
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
946 947
        *pi_width = i_width * f_zoom;
        *pi_height = i_height * f_zoom;
Gildas Bazin's avatar
 
Gildas Bazin committed
948 949 950 951
        return;
    }
    else if( i_width >= 0 )
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
952 953 954
        *pi_width = i_width * f_zoom;
        *pi_height = i_width * f_zoom * VOUT_ASPECT_FACTOR /
                        p_vout->render.i_aspect;
Gildas Bazin's avatar
 
Gildas Bazin committed
955 956 957 958
        return;
    }
    else if( i_height >= 0 )
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
959 960 961
        *pi_height = i_height * f_zoom;
        *pi_width = i_height * f_zoom * p_vout->render.i_aspect /
                       VOUT_ASPECT_FACTOR;
Gildas Bazin's avatar
 
Gildas Bazin committed
962 963 964 965 966 967
        return;
    }

    if( p_vout->render.i_height * p_vout->render.i_aspect
        >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
968
        *pi_width = p_vout->render.i_height * f_zoom
Gildas Bazin's avatar
 
Gildas Bazin committed
969
          * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
Gildas Bazin's avatar
 
Gildas Bazin committed
970
        *pi_height = p_vout->render.i_height * f_zoom;
Gildas Bazin's avatar
 
Gildas Bazin committed
971 972 973
    }
    else
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
974 975
        *pi_width = p_vout->render.i_width * f_zoom;
        *pi_height = p_vout->render.i_width * f_zoom
Gildas Bazin's avatar
 
Gildas Bazin committed
976 977 978
          * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
    }
}