b3be49e7a675b2eb0b30e3f1b09a2189cb48bed7
[vlc.git] / src / video_output / vout_pictures.c
1 /*****************************************************************************
2  * vout_pictures.c : picture management functions
3  *****************************************************************************
4  * Copyright (C) 2000-2004 VideoLAN
5  * $Id$
6  *
7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
8  *          Samuel Hocevar <sam@zoy.org>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
23  *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28 #include <stdlib.h>                                                /* free() */
29 #include <stdio.h>                                              /* sprintf() */
30 #include <string.h>                                            /* strerror() */
31
32 #include <vlc/vlc.h>
33
34 #include "vlc_video.h"
35 #include "video_output.h"
36 #include "vlc_spu.h"
37
38 #include "vout_pictures.h"
39
40 /**
41  * Display a picture
42  *
43  * Remove the reservation flag of a picture, which will cause it to be ready
44  * for display. The picture won't be displayed until vout_DatePicture has been
45  * called.
46  */
47 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
48 {
49     vlc_mutex_lock( &p_vout->picture_lock );
50     switch( p_pic->i_status )
51     {
52     case RESERVED_PICTURE:
53         p_pic->i_status = RESERVED_DISP_PICTURE;
54         break;
55     case RESERVED_DATED_PICTURE:
56         p_pic->i_status = READY_PICTURE;
57         break;
58     default:
59         msg_Err( p_vout, "picture to display %p has invalid status %d",
60                          p_pic, p_pic->i_status );
61         break;
62     }
63
64     vlc_mutex_unlock( &p_vout->picture_lock );
65 }
66
67 /**
68  * Date a picture
69  *
70  * Remove the reservation flag of a picture, which will cause it to be ready
71  * for display. The picture won't be displayed until vout_DisplayPicture has
72  * been called.
73  * \param p_vout The vout in question
74  * \param p_pic The picture to date
75  * \param date The date to display the picture
76  */
77 void vout_DatePicture( vout_thread_t *p_vout,
78                        picture_t *p_pic, mtime_t date )
79 {
80     vlc_mutex_lock( &p_vout->picture_lock );
81     p_pic->date = date;
82     switch( p_pic->i_status )
83     {
84     case RESERVED_PICTURE:
85         p_pic->i_status = RESERVED_DATED_PICTURE;
86         break;
87     case RESERVED_DISP_PICTURE:
88         p_pic->i_status = READY_PICTURE;
89         break;
90     default:
91         msg_Err( p_vout, "picture to date %p has invalid status %d",
92                          p_pic, p_pic->i_status );
93         break;
94     }
95
96     vlc_mutex_unlock( &p_vout->picture_lock );
97 }
98
99 /**
100  * Allocate a picture in the video output heap.
101  *
102  * This function creates a reserved image in the video output heap.
103  * A null pointer is returned if the function fails. This method provides an
104  * already allocated zone of memory in the picture data fields.
105  * It needs locking since several pictures can be created by several producers
106  * threads.
107  */
108 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
109                                vlc_bool_t b_progressive,
110                                vlc_bool_t b_top_field_first,
111                                unsigned int i_nb_fields )
112 {
113     int         i_pic;                                      /* picture index */
114     picture_t * p_pic;
115     picture_t * p_freepic = NULL;                      /* first free picture */
116
117     /* Get lock */
118     vlc_mutex_lock( &p_vout->picture_lock );
119
120     /*
121      * Look for an empty place in the picture heap.
122      */
123     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
124     {
125         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
126                                  % I_RENDERPICTURES];
127
128         switch( p_pic->i_status )
129         {
130             case DESTROYED_PICTURE:
131                 /* Memory will not be reallocated, and function can end
132                  * immediately - this is the best possible case, since no
133                  * memory allocation needs to be done */
134                 p_pic->i_status   = RESERVED_PICTURE;
135                 p_pic->i_refcount = 0;
136                 p_pic->b_force    = 0;
137
138                 p_pic->b_progressive        = b_progressive;
139                 p_pic->i_nb_fields          = i_nb_fields;
140                 p_pic->b_top_field_first    = b_top_field_first;
141
142                 p_vout->i_heap_size++;
143                 p_vout->render.i_last_used_pic =
144                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
145                     % I_RENDERPICTURES;
146                 vlc_mutex_unlock( &p_vout->picture_lock );
147                 return( p_pic );
148
149             case FREE_PICTURE:
150                 /* Picture is empty and ready for allocation */
151                 p_vout->render.i_last_used_pic =
152                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
153                     % I_RENDERPICTURES;
154                 p_freepic = p_pic;
155                 break;
156
157             default:
158                 break;
159         }
160     }
161
162     /*
163      * Prepare picture
164      */
165     if( p_freepic != NULL )
166     {
167         vout_AllocatePicture( VLC_OBJECT(p_vout),
168                               p_freepic, p_vout->render.i_chroma,
169                               p_vout->render.i_width, p_vout->render.i_height,
170                               p_vout->render.i_aspect );
171
172         if( p_freepic->i_planes )
173         {
174             /* Copy picture information, set some default values */
175             p_freepic->i_status   = RESERVED_PICTURE;
176             p_freepic->i_type     = MEMORY_PICTURE;
177             p_freepic->b_slow     = 0;
178
179             p_freepic->i_refcount = 0;
180             p_freepic->b_force = 0;
181
182             p_freepic->b_progressive        = b_progressive;
183             p_freepic->i_nb_fields          = i_nb_fields;
184             p_freepic->b_top_field_first    = b_top_field_first;
185
186             p_freepic->i_matrix_coefficients = 1;
187
188             p_vout->i_heap_size++;
189         }
190         else
191         {
192             /* Memory allocation failed : set picture as empty */
193             p_freepic->i_status = FREE_PICTURE;
194             p_freepic = NULL;
195
196             msg_Err( p_vout, "picture allocation failed" );
197         }
198
199         vlc_mutex_unlock( &p_vout->picture_lock );
200
201         return( p_freepic );
202     }
203
204     /* No free or destroyed picture could be found, but the decoder
205      * will try again in a while. */
206     vlc_mutex_unlock( &p_vout->picture_lock );
207
208     return( NULL );
209 }
210
211 /**
212  * Remove a permanent or reserved picture from the heap
213  *
214  * This function frees a previously reserved picture or a permanent
215  * picture. It is meant to be used when the construction of a picture aborted.
216  * Note that the picture will be destroyed even if it is linked !
217  */
218 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
219 {
220     vlc_mutex_lock( &p_vout->picture_lock );
221
222 #ifdef DEBUG
223     /* Check if picture status is valid */
224     if( (p_pic->i_status != RESERVED_PICTURE) &&
225         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
226         (p_pic->i_status != RESERVED_DISP_PICTURE) )
227     {
228         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
229                          p_pic, p_pic->i_status );
230     }
231 #endif
232
233     p_pic->i_status = DESTROYED_PICTURE;
234     p_vout->i_heap_size--;
235
236     vlc_mutex_unlock( &p_vout->picture_lock );
237 }
238
239 /**
240  * Increment reference counter of a picture
241  *
242  * This function increments the reference counter of a picture in the video
243  * heap. It needs a lock since several producer threads can access the picture.
244  */
245 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
246 {
247     vlc_mutex_lock( &p_vout->picture_lock );
248     p_pic->i_refcount++;
249     vlc_mutex_unlock( &p_vout->picture_lock );
250 }
251
252 /**
253  * Decrement reference counter of a picture
254  *
255  * This function decrement the reference counter of a picture in the video heap
256  */
257 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
258 {
259     vlc_mutex_lock( &p_vout->picture_lock );
260     p_pic->i_refcount--;
261
262     if( p_pic->i_refcount < 0 )
263     {
264         msg_Err( p_vout, "picture %p refcount is %i",
265                  p_pic, p_pic->i_refcount );
266         p_pic->i_refcount = 0;
267     }
268
269     if( ( p_pic->i_refcount == 0 ) &&
270         ( p_pic->i_status == DISPLAYED_PICTURE ) )
271     {
272         p_pic->i_status = DESTROYED_PICTURE;
273         p_vout->i_heap_size--;
274     }
275
276     vlc_mutex_unlock( &p_vout->picture_lock );
277 }
278
279 /**
280  * Render a picture
281  *
282  * This function chooses whether the current picture needs to be copied
283  * before rendering, does the subpicture magic, and tells the video output
284  * thread which direct buffer needs to be displayed.
285  */
286 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
287                                                        subpicture_t *p_subpic )
288 {
289     int i_scale_width, i_scale_height;
290
291     if( p_pic == NULL )
292     {
293         /* XXX: subtitles */
294         return NULL;
295     }
296
297     i_scale_width = p_vout->fmt_out.i_visible_width * 1000 /
298         p_vout->fmt_in.i_visible_width;
299     i_scale_height = p_vout->fmt_out.i_visible_height * 1000 /
300         p_vout->fmt_in.i_visible_height;
301
302     if( p_pic->i_type == DIRECT_PICTURE )
303     {
304         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
305             p_pic->b_force )
306         {
307             /* Picture is in a direct buffer and is still in use,
308              * we need to copy it to another direct buffer before
309              * displaying it if there are subtitles. */
310             if( p_subpic != NULL )
311             {
312                 /* We have subtitles. First copy the picture to
313                  * the spare direct buffer, then render the
314                  * subtitles. */
315                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
316
317                 spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
318                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
319                                        i_scale_width, i_scale_height );
320
321                 return PP_OUTPUTPICTURE[0];
322             }
323
324             /* No subtitles, picture is in a directbuffer so
325              * we can display it directly even if it is still
326              * in use. */
327             return p_pic;
328         }
329
330         /* Picture is in a direct buffer but isn't used by the
331          * decoder. We can safely render subtitles on it and
332          * display it. */
333         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_pic, p_pic,
334                                p_subpic, i_scale_width, i_scale_height );
335
336         return p_pic;
337     }
338
339     /* Not a direct buffer. We either need to copy it to a direct buffer,
340      * or render it if the chroma isn't the same. */
341     if( p_vout->b_direct )
342     {
343         /* Picture is not in a direct buffer, but is exactly the
344          * same size as the direct buffers. A memcpy() is enough,
345          * then render the subtitles. */
346
347         if( PP_OUTPUTPICTURE[0]->pf_lock )
348             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
349                 return NULL;
350
351         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
352         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
353                                PP_OUTPUTPICTURE[0], p_pic,
354                                p_subpic, i_scale_width, i_scale_height );
355
356         if( PP_OUTPUTPICTURE[0]->pf_unlock )
357             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
358
359         return PP_OUTPUTPICTURE[0];
360     }
361
362     /* Picture is not in a direct buffer, and needs to be converted to
363      * another size/chroma. Then the subtitles need to be rendered as
364      * well. This usually means software YUV, or hardware YUV with a
365      * different chroma. */
366
367     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
368     {
369         /* The picture buffer is in slow memory. We'll use
370          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
371          * one for subpictures rendering. */
372         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
373         if( p_tmp_pic->i_status == FREE_PICTURE )
374         {
375             vout_AllocatePicture( VLC_OBJECT(p_vout),
376                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
377                                   p_vout->fmt_out.i_width,
378                                   p_vout->fmt_out.i_height,
379                                   p_vout->fmt_out.i_aspect );
380             p_tmp_pic->i_type = MEMORY_PICTURE;
381             p_tmp_pic->i_status = RESERVED_PICTURE;
382         }
383
384         /* Convert image to the first direct buffer */
385         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
386
387         /* Render subpictures on the first direct buffer */
388         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_tmp_pic,
389                                p_tmp_pic, p_subpic,
390                                i_scale_width, i_scale_height );
391
392         if( p_vout->p_picture[0].pf_lock )
393             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
394                 return NULL;
395
396         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
397     }
398     else
399     {
400         if( p_vout->p_picture[0].pf_lock )
401             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
402                 return NULL;
403
404         /* Convert image to the first direct buffer */
405         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
406
407         /* Render subpictures on the first direct buffer */
408         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
409                                &p_vout->p_picture[0], &p_vout->p_picture[0],
410                                p_subpic, i_scale_width, i_scale_height );
411     }
412
413     if( p_vout->p_picture[0].pf_unlock )
414         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
415
416     return &p_vout->p_picture[0];
417 }
418
419 /**
420  * Calculate image window coordinates
421  *
422  * This function will be accessed by plugins. It calculates the relative
423  * position of the output window and the image window.
424  */
425 void vout_PlacePicture( vout_thread_t *p_vout,
426                         unsigned int i_width, unsigned int i_height,
427                         unsigned int *pi_x, unsigned int *pi_y,
428                         unsigned int *pi_width, unsigned int *pi_height )
429 {
430     if( (i_width <= 0) || (i_height <=0) )
431     {
432         *pi_width = *pi_height = *pi_x = *pi_y = 0;
433         return;
434     }
435
436     if( p_vout->b_scale )
437     {
438         *pi_width = i_width;
439         *pi_height = i_height;
440     }
441     else
442     {
443         *pi_width = __MIN( i_width, p_vout->render.i_width );
444         *pi_height = __MIN( i_height, p_vout->render.i_height );
445     }
446
447     if( VOUT_ASPECT_FACTOR * *pi_width / *pi_height < p_vout->render.i_aspect )
448     {
449         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
450     }
451     else
452     {
453         *pi_height = *pi_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
454     }
455
456     if( *pi_width > i_width )
457     {
458         *pi_width = i_width;
459         *pi_height = VOUT_ASPECT_FACTOR * *pi_width / p_vout->render.i_aspect;
460     }
461
462     if( *pi_height > i_height )
463     {
464         *pi_height = i_height;
465         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
466     }
467
468     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
469     {
470     case VOUT_ALIGN_LEFT:
471         *pi_x = 0;
472         break;
473     case VOUT_ALIGN_RIGHT:
474         *pi_x = i_width - *pi_width;
475         break;
476     default:
477         *pi_x = ( i_width - *pi_width ) / 2;
478     }
479
480     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
481     {
482     case VOUT_ALIGN_TOP:
483         *pi_y = 0;
484         break;
485     case VOUT_ALIGN_BOTTOM:
486         *pi_y = i_height - *pi_height;
487         break;
488     default:
489         *pi_y = ( i_height - *pi_height ) / 2;
490     }
491 }
492
493 /**
494  * Allocate a new picture in the heap.
495  *
496  * This function allocates a fake direct buffer in memory, which can be
497  * used exactly like a video buffer. The video output thread then manages
498  * how it gets displayed.
499  */
500 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
501                             vlc_fourcc_t i_chroma,
502                             int i_width, int i_height, int i_aspect )
503 {
504     int i_bytes, i_index, i_width_aligned, i_height_aligned;
505
506     /* Make sure the real dimensions are a multiple of 16 */
507     i_width_aligned = (i_width + 15) >> 4 << 4;
508     i_height_aligned = (i_height + 15) >> 4 << 4;
509
510     if( vout_InitPicture( p_this, p_pic, i_chroma,
511                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
512     {
513         p_pic->i_planes = 0;
514         return VLC_EGENERIC;
515     }
516
517     /* Calculate how big the new image should be */
518     i_bytes = p_pic->format.i_bits_per_pixel *
519         i_width_aligned * i_height_aligned / 8;
520
521     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
522
523     if( p_pic->p_data == NULL )
524     {
525         p_pic->i_planes = 0;
526         return VLC_EGENERIC;
527     }
528
529     /* Fill the p_pixels field for each plane */
530     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
531
532     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
533     {
534         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
535             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
536     }
537
538     return VLC_SUCCESS;
539 }
540
541 /**
542  * Initialise the video format fields given chroma/size.
543  *
544  * This function initializes all the video_frame_format_t fields given the
545  * static properties of a picture (chroma and size).
546  * \param p_format Pointer to the format structure to initialize
547  * \param i_chroma Chroma to set
548  * \param i_width Width to set
549  * \param i_height Height to set
550  * \param i_aspect Aspect ratio
551  */
552 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
553                       int i_width, int i_height, int i_aspect )
554 {
555     p_format->i_chroma   = i_chroma;
556     p_format->i_width    = p_format->i_visible_width  = i_width;
557     p_format->i_height   = p_format->i_visible_height = i_height;
558     p_format->i_x_offset = p_format->i_y_offset = 0;
559     p_format->i_aspect   = i_aspect;
560
561 #if 0
562     /* Assume we have square pixels */
563     if( i_width && i_height )
564         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
565     else
566         p_format->i_aspect = 0;
567 #endif
568
569     switch( i_chroma )
570     {
571         case FOURCC_YUVA:
572             p_format->i_bits_per_pixel = 32;
573             break;
574         case FOURCC_I444:
575             p_format->i_bits_per_pixel = 24;
576             break;
577         case FOURCC_I422:
578         case FOURCC_YUY2:
579         case FOURCC_UYVY:
580             p_format->i_bits_per_pixel = 16;
581             p_format->i_bits_per_pixel = 16;
582             break;
583         case FOURCC_I411:
584         case FOURCC_YV12:
585         case FOURCC_I420:
586         case FOURCC_IYUV:
587             p_format->i_bits_per_pixel = 12;
588             break;
589         case FOURCC_I410:
590         case FOURCC_YVU9:
591             p_format->i_bits_per_pixel = 9;
592             break;
593         case FOURCC_Y211:
594             p_format->i_bits_per_pixel = 8;
595             break;
596         case FOURCC_YUVP:
597             p_format->i_bits_per_pixel = 8;
598             break;
599
600         case FOURCC_RV32:
601             p_format->i_bits_per_pixel = 32;
602             break;
603         case FOURCC_RV24:
604             p_format->i_bits_per_pixel = 24;
605             break;
606         case FOURCC_RV15:
607         case FOURCC_RV16:
608             p_format->i_bits_per_pixel = 16;
609             break;
610         case FOURCC_RGB2:
611             p_format->i_bits_per_pixel = 8;
612             break;
613         default:
614             p_format->i_bits_per_pixel = 0;
615             break;
616     }
617 }
618
619 /**
620  * Initialise the picture_t fields given chroma/size.
621  *
622  * This function initializes most of the picture_t fields given a chroma and
623  * size. It makes the assumption that stride == width.
624  * \param p_this The calling object
625  * \param p_pic Pointer to the picture to initialize
626  * \param i_chroma The chroma fourcc to set
627  * \param i_width The width of the picture
628  * \param i_height The height of the picture
629  * \param i_aspect The aspect ratio of the picture
630  */
631 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
632                         vlc_fourcc_t i_chroma,
633                         int i_width, int i_height, int i_aspect )
634 {
635     int i_index, i_width_aligned, i_height_aligned;
636
637     /* Store default values */
638     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
639     {
640         p_pic->p[i_index].p_pixels = NULL;
641         p_pic->p[i_index].i_pixel_pitch = 1;
642     }
643
644     p_pic->pf_release = 0;
645     p_pic->pf_lock = 0;
646     p_pic->pf_unlock = 0;
647     p_pic->i_refcount = 0;
648
649     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
650
651     /* Make sure the real dimensions are a multiple of 16 */
652     i_width_aligned = (i_width + 15) >> 4 << 4;
653     i_height_aligned = (i_height + 15) >> 4 << 4;
654
655     /* Calculate coordinates */
656     switch( i_chroma )
657     {
658         case FOURCC_I411:
659             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
660             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
661             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
662             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
663             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
664             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
665             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
666             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
667             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
668             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
669             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
670             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
671             p_pic->i_planes = 3;
672             break;
673
674         case FOURCC_I410:
675         case FOURCC_YVU9:
676             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
677             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
678             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
679             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
680             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
681             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
682             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
683             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
684             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
685             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
686             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
687             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
688             p_pic->i_planes = 3;
689             break;
690
691         case FOURCC_YV12:
692         case FOURCC_I420:
693         case FOURCC_IYUV:
694             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
695             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
696             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
697             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
698             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
699             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
700             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
701             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
702             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
703             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
704             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
705             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
706             p_pic->i_planes = 3;
707             break;
708
709         case FOURCC_I422:
710             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
711             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
712             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
713             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
714             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
715             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
716             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
717             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
718             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
719             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
720             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
721             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
722             p_pic->i_planes = 3;
723             break;
724
725         case FOURCC_I444:
726             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
727             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
728             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
729             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
730             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
731             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
732             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
733             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
734             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
735             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
736             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
737             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
738             p_pic->i_planes = 3;
739             break;
740
741         case FOURCC_YUVA:
742             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
743             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
744             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
745             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
746             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
747             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
748             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
749             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
750             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
751             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
752             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
753             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
754             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
755             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
756             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
757             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
758             p_pic->i_planes = 4;
759             break;
760
761         case FOURCC_YUVP:
762             p_pic->p->i_lines = i_height_aligned;
763             p_pic->p->i_visible_lines = i_height;
764             p_pic->p->i_pitch = i_width_aligned;
765             p_pic->p->i_visible_pitch = i_width;
766             p_pic->p->i_pixel_pitch = 8;
767             p_pic->i_planes = 1;
768             break;
769
770         case FOURCC_Y211:
771             p_pic->p->i_lines = i_height_aligned;
772             p_pic->p->i_visible_lines = i_height;
773             p_pic->p->i_pitch = i_width_aligned;
774             p_pic->p->i_visible_pitch = i_width;
775             p_pic->p->i_pixel_pitch = 4;
776             p_pic->i_planes = 1;
777             break;
778
779         case FOURCC_UYVY:
780         case FOURCC_YUY2:
781             p_pic->p->i_lines = i_height_aligned;
782             p_pic->p->i_visible_lines = i_height;
783             p_pic->p->i_pitch = i_width_aligned * 2;
784             p_pic->p->i_visible_pitch = i_width * 2;
785             p_pic->p->i_pixel_pitch = 4;
786             p_pic->i_planes = 1;
787             break;
788
789         case FOURCC_RGB2:
790             p_pic->p->i_lines = i_height_aligned;
791             p_pic->p->i_visible_lines = i_height;
792             p_pic->p->i_pitch = i_width_aligned;
793             p_pic->p->i_visible_pitch = i_width;
794             p_pic->p->i_pixel_pitch = 1;
795             p_pic->i_planes = 1;
796             break;
797
798         case FOURCC_RV15:
799             p_pic->p->i_lines = i_height_aligned;
800             p_pic->p->i_visible_lines = i_height;
801             p_pic->p->i_pitch = i_width_aligned * 2;
802             p_pic->p->i_visible_pitch = i_width * 2;
803             p_pic->p->i_pixel_pitch = 2;
804             p_pic->i_planes = 1;
805             break;
806
807         case FOURCC_RV16:
808             p_pic->p->i_lines = i_height_aligned;
809             p_pic->p->i_visible_lines = i_height;
810             p_pic->p->i_pitch = i_width_aligned * 2;
811             p_pic->p->i_visible_pitch = i_width * 2;
812             p_pic->p->i_pixel_pitch = 2;
813             p_pic->i_planes = 1;
814             break;
815
816         case FOURCC_RV24:
817             p_pic->p->i_lines = i_height_aligned;
818             p_pic->p->i_visible_lines = i_height;
819             p_pic->p->i_pitch = i_width_aligned * 3;
820             p_pic->p->i_visible_pitch = i_width * 3;
821             p_pic->p->i_pixel_pitch = 3;
822             p_pic->i_planes = 1;
823             break;
824
825         case FOURCC_RV32:
826             p_pic->p->i_lines = i_height_aligned;
827             p_pic->p->i_visible_lines = i_height;
828             p_pic->p->i_pitch = i_width_aligned * 4;
829             p_pic->p->i_visible_pitch = i_width * 4;
830             p_pic->p->i_pixel_pitch = 4;
831             p_pic->i_planes = 1;
832             break;
833
834         default:
835             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
836                              i_chroma, (char*)&i_chroma );
837             p_pic->i_planes = 0;
838             return VLC_EGENERIC;
839     }
840
841     return VLC_SUCCESS;
842 }
843
844 /**
845  * Compare two chroma values
846  *
847  * This function returns 1 if the two fourcc values given as argument are
848  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
849  */
850 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
851 {
852     /* If they are the same, they are the same ! */
853     if( i_chroma == i_amorhc )
854     {
855         return 1;
856     }
857
858     /* Check for equivalence classes */
859     switch( i_chroma )
860     {
861         case FOURCC_I420:
862         case FOURCC_IYUV:
863         case FOURCC_YV12:
864             switch( i_amorhc )
865             {
866                 case FOURCC_I420:
867                 case FOURCC_IYUV:
868                 case FOURCC_YV12:
869                     return 1;
870
871                 default:
872                     return 0;
873             }
874
875         case FOURCC_UYVY:
876         case FOURCC_UYNV:
877         case FOURCC_Y422:
878             switch( i_amorhc )
879             {
880                 case FOURCC_UYVY:
881                 case FOURCC_UYNV:
882                 case FOURCC_Y422:
883                     return 1;
884
885                 default:
886                     return 0;
887             }
888
889         case FOURCC_YUY2:
890         case FOURCC_YUNV:
891             switch( i_amorhc )
892             {
893                 case FOURCC_YUY2:
894                 case FOURCC_YUNV:
895                     return 1;
896
897                 default:
898                     return 0;
899             }
900
901         default:
902             return 0;
903     }
904 }
905
906 /*****************************************************************************
907  * vout_CopyPicture: copy a picture to another one
908  *****************************************************************************
909  * This function takes advantage of the image format, and reduces the
910  * number of calls to memcpy() to the minimum. Source and destination
911  * images must have same width (hence i_visible_pitch), height, and chroma.
912  *****************************************************************************/
913 void __vout_CopyPicture( vlc_object_t *p_this,
914                          picture_t *p_dest, picture_t *p_src )
915 {
916     int i;
917
918     for( i = 0; i < p_src->i_planes ; i++ )
919     {
920         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
921         {
922             /* There are margins, but with the same width : perfect ! */
923             p_this->p_vlc->pf_memcpy(
924                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
925                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
926         }
927         else
928         {
929             /* We need to proceed line by line */
930             uint8_t *p_in = p_src->p[i].p_pixels;
931             uint8_t *p_out = p_dest->p[i].p_pixels;
932             int i_line;
933
934             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
935             {
936                 p_this->p_vlc->pf_memcpy( p_out, p_in,
937                                           p_src->p[i].i_visible_pitch );
938                 p_in += p_src->p[i].i_pitch;
939                 p_out += p_dest->p[i].i_pitch;
940             }
941         }
942     }
943
944     p_dest->date = p_src->date;
945     p_dest->b_force = p_src->b_force;
946     p_dest->i_nb_fields = p_src->i_nb_fields;
947     p_dest->b_progressive = p_src->b_progressive;
948     p_dest->b_top_field_first = p_src->b_top_field_first;
949 }