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vout_pictures.c
资源名称：vlc-0.8.1.tar.gz　[点击查看]
上传用户：riyaled888
上传日期：2009-03-27
资源大小：7338k
文件大小：32k
源码类别：

多媒体

开发平台：

MultiPlatform

vout_pictures.c：源码内容
  1. /*****************************************************************************
  2.  * vout_pictures.c : picture management functions
  3.  *****************************************************************************
  4.  * Copyright (C) 2000-2004 VideoLAN
  5.  * $Id: vout_pictures.c 9268 2004-11-10 13:01:48Z gbazin $
  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.  *****************************************************************************/
  25. /*****************************************************************************
  26.  * Preamble
  27.  *****************************************************************************/
  28. #include <stdlib.h>                                                /* free() */
  29. #include <stdio.h>                                              /* sprintf() */
  30. #include <string.h>                                            /* strerror() */
  32. #include <vlc/vlc.h>
  34. #include "vlc_video.h"
  35. #include "video_output.h"
  36. #include "vlc_spu.h"
  38. #include "vout_pictures.h"
  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.     }
  64.     vlc_mutex_unlock( &p_vout->picture_lock );
  65. }
  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.     }
  96.     vlc_mutex_unlock( &p_vout->picture_lock );
  97. }
  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 */
  117.     /* Get lock */
  118.     vlc_mutex_lock( &p_vout->picture_lock );
  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];
  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;
  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;
  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 );
  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;
  157.             default:
  158.                 break;
  159.         }
  160.     }
  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 );
  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;
  179.             p_freepic->i_refcount = 0;
  180.             p_freepic->b_force = 0;
  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;
  186.             p_freepic->i_matrix_coefficients = 1;
  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;
  196.             msg_Err( p_vout, "picture allocation failed" );
  197.         }
  199.         vlc_mutex_unlock( &p_vout->picture_lock );
  201.         return( p_freepic );
  202.     }
  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 );
  208.     return( NULL );
  209. }
  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 );
  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
  233.     p_pic->i_status = DESTROYED_PICTURE;
  234.     p_vout->i_heap_size--;
  236.     vlc_mutex_unlock( &p_vout->picture_lock );
  237. }
  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. }
  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--;
  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.     }
  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.     }
  276.     vlc_mutex_unlock( &p_vout->picture_lock );
  277. }
  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.     video_format_t fmt;
  290.     int i_scale_width, i_scale_height;
  292.     if( p_pic == NULL )
  293.     {
  294.         /* XXX: subtitles */
  296.         return NULL;
  297.     }
  299.     fmt.i_aspect = p_vout->output.i_aspect;
  300.     fmt.i_chroma = p_vout->output.i_chroma;
  301.     fmt.i_width = p_vout->output.i_width;
  302.     fmt.i_height = p_vout->output.i_height;
  303.     fmt.i_sar_num = p_vout->output.i_aspect * fmt.i_height / fmt.i_width;
  304.     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
  305.     i_scale_width = p_vout->output.i_width * 1000 / p_vout->render.i_width;
  306.     i_scale_height = p_vout->output.i_height * 1000 / p_vout->render.i_height;
  308.     if( p_pic->i_type == DIRECT_PICTURE )
  309.     {
  310.         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
  311.             p_pic->b_force )
  312.         {
  313.             /* Picture is in a direct buffer and is still in use,
  314.              * we need to copy it to another direct buffer before
  315.              * displaying it if there are subtitles. */
  316.             if( p_subpic != NULL )
  317.             {
  318.                 /* We have subtitles. First copy the picture to
  319.                  * the spare direct buffer, then render the
  320.                  * subtitles. */
  321.                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
  323.                 spu_RenderSubpictures( p_vout->p_spu, &fmt,
  324.                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
  325.                                        i_scale_width, i_scale_height );
  327.                 return PP_OUTPUTPICTURE[0];
  328.             }
  330.             /* No subtitles, picture is in a directbuffer so
  331.              * we can display it directly even if it is still
  332.              * in use. */
  333.             return p_pic;
  334.         }
  336.         /* Picture is in a direct buffer but isn't used by the
  337.          * decoder. We can safely render subtitles on it and
  338.          * display it. */
  339.         spu_RenderSubpictures( p_vout->p_spu, &fmt, p_pic, p_pic, p_subpic,
  340.                                i_scale_width, i_scale_height );
  342.         return p_pic;
  343.     }
  345.     /* Not a direct buffer. We either need to copy it to a direct buffer,
  346.      * or render it if the chroma isn't the same. */
  347.     if( p_vout->b_direct )
  348.     {
  349.         /* Picture is not in a direct buffer, but is exactly the
  350.          * same size as the direct buffers. A memcpy() is enough,
  351.          * then render the subtitles. */
  353.         if( PP_OUTPUTPICTURE[0]->pf_lock )
  354.             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
  355.                 return NULL;
  357.         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
  358.         spu_RenderSubpictures( p_vout->p_spu, &fmt, PP_OUTPUTPICTURE[0],
  359.                                p_pic, p_subpic, i_scale_width, i_scale_height);
  361.         if( PP_OUTPUTPICTURE[0]->pf_unlock )
  362.             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
  364.         return PP_OUTPUTPICTURE[0];
  365.     }
  367.     /* Picture is not in a direct buffer, and needs to be converted to
  368.      * another size/chroma. Then the subtitles need to be rendered as
  369.      * well. This usually means software YUV, or hardware YUV with a
  370.      * different chroma. */
  372.     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
  373.     {
  374.         /* The picture buffer is in slow memory. We'll use
  375.          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
  376.          * one for subpictures rendering. */
  377.         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
  378.         if( p_tmp_pic->i_status == FREE_PICTURE )
  379.         {
  380.             vout_AllocatePicture( VLC_OBJECT(p_vout),
  381.                                   p_tmp_pic, p_vout->output.i_chroma,
  382.                                   p_vout->output.i_width,
  383.                                   p_vout->output.i_height,
  384.                                   p_vout->output.i_aspect );
  385.             p_tmp_pic->i_type = MEMORY_PICTURE;
  386.             p_tmp_pic->i_status = RESERVED_PICTURE;
  387.         }
  389.         /* Convert image to the first direct buffer */
  390.         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
  392.         /* Render subpictures on the first direct buffer */
  393.         spu_RenderSubpictures( p_vout->p_spu, &fmt, p_tmp_pic,
  394.                                p_tmp_pic, p_subpic,
  395.                                i_scale_width, i_scale_height );
  397.         if( p_vout->p_picture[0].pf_lock )
  398.             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
  399.                 return NULL;
  401.         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
  402.     }
  403.     else
  404.     {
  405.         if( p_vout->p_picture[0].pf_lock )
  406.             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
  407.                 return NULL;
  409.         /* Convert image to the first direct buffer */
  410.         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
  412.         /* Render subpictures on the first direct buffer */
  413.         spu_RenderSubpictures( p_vout->p_spu, &fmt, &p_vout->p_picture[0],
  414.                                &p_vout->p_picture[0], p_subpic,
  415.                                i_scale_width, i_scale_height );
  416.     }
  418.     if( p_vout->p_picture[0].pf_unlock )
  419.         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
  421.     return &p_vout->p_picture[0];
  422. }
  424. /**
  425.  * Calculate image window coordinates
  426.  *
  427.  * This function will be accessed by plugins. It calculates the relative
  428.  * position of the output window and the image window.
  429.  */
  430. void vout_PlacePicture( vout_thread_t *p_vout,
  431.                         unsigned int i_width, unsigned int i_height,
  432.                         unsigned int *pi_x, unsigned int *pi_y,
  433.                         unsigned int *pi_width, unsigned int *pi_height )
  434. {
  435.     if( (i_width <= 0) || (i_height <=0) )
  436.     {
  437.         *pi_width = *pi_height = *pi_x = *pi_y = 0;
  439.         return;
  440.     }
  442.     if( p_vout->b_scale )
  443.     {
  444.         *pi_width = i_width;
  445.         *pi_height = i_height;
  446.     }
  447.     else
  448.     {
  449.         *pi_width = __MIN( i_width, p_vout->render.i_width );
  450.         *pi_height = __MIN( i_height, p_vout->render.i_height );
  451.     }
  453.     if( VOUT_ASPECT_FACTOR * *pi_width / *pi_height < p_vout->render.i_aspect )
  454.     {
  455.         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
  456.     }
  457.     else
  458.     {
  459.         *pi_height = *pi_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
  460.     }
  462.     if( *pi_width > i_width )
  463.     {
  464.         *pi_width = i_width;
  465.         *pi_height = VOUT_ASPECT_FACTOR * *pi_width / p_vout->render.i_aspect;
  466.     }
  468.     if( *pi_height > i_height )
  469.     {
  470.         *pi_height = i_height;
  471.         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
  472.     }
  474.     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
  475.     {
  476.     case VOUT_ALIGN_LEFT:
  477.         *pi_x = 0;
  478.         break;
  479.     case VOUT_ALIGN_RIGHT:
  480.         *pi_x = i_width - *pi_width;
  481.         break;
  482.     default:
  483.         *pi_x = ( i_width - *pi_width ) / 2;
  484.     }
  486.     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
  487.     {
  488.     case VOUT_ALIGN_TOP:
  489.         *pi_y = 0;
  490.         break;
  491.     case VOUT_ALIGN_BOTTOM:
  492.         *pi_y = i_height - *pi_height;
  493.         break;
  494.     default:
  495.         *pi_y = ( i_height - *pi_height ) / 2;
  496.     }
  497. }
  499. /**
  500.  * Allocate a new picture in the heap.
  501.  *
  502.  * This function allocates a fake direct buffer in memory, which can be
  503.  * used exactly like a video buffer. The video output thread then manages
  504.  * how it gets displayed.
  505.  */
  506. int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
  507.                             vlc_fourcc_t i_chroma,
  508.                             int i_width, int i_height, int i_aspect )
  509. {
  510.     int i_bytes, i_index, i_width_aligned, i_height_aligned;
  512.     /* Make sure the real dimensions are a multiple of 16 */
  513.     i_width_aligned = (i_width + 15) >> 4 << 4;
  514.     i_height_aligned = (i_height + 15) >> 4 << 4;
  516.     if( vout_InitPicture( p_this, p_pic, i_chroma,
  517.                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
  518.     {
  519.         p_pic->i_planes = 0;
  520.         return VLC_EGENERIC;
  521.     }
  523.     /* Calculate how big the new image should be */
  524.     i_bytes = p_pic->format.i_bits_per_pixel *
  525.         i_width_aligned * i_height_aligned / 8;
  527.     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
  529.     if( p_pic->p_data == NULL )
  530.     {
  531.         p_pic->i_planes = 0;
  532.         return VLC_EGENERIC;
  533.     }
  535.     /* Fill the p_pixels field for each plane */
  536.     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
  538.     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
  539.     {
  540.         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
  541.             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
  542.     }
  544.     return VLC_SUCCESS;
  545. }
  547. /**
  548.  * Initialise the video format fields given chroma/size.
  549.  *
  550.  * This function initializes all the video_frame_format_t fields given the
  551.  * static properties of a picture (chroma and size).
  552.  * param p_format Pointer to the format structure to initialize
  553.  * param i_chroma Chroma to set
  554.  * param i_width Width to set
  555.  * param i_height Height to set
  556.  * param i_aspect Aspect ratio
  557.  */
  558. void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
  559.                       int i_width, int i_height, int i_aspect )
  560. {
  561.     p_format->i_chroma   = i_chroma;
  562.     p_format->i_width    = p_format->i_visible_width  = i_width;
  563.     p_format->i_height   = p_format->i_visible_height = i_height;
  564.     p_format->i_x_offset = p_format->i_y_offset = 0;
  565.     p_format->i_aspect   = i_aspect;
  567. #if 0
  568.     /* Assume we have square pixels */
  569.     if( i_width && i_height )
  570.         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
  571.     else
  572.         p_format->i_aspect = 0;
  573. #endif
  575.     switch( i_chroma )
  576.     {
  577.         case FOURCC_YUVA:
  578.             p_format->i_bits_per_pixel = 32;
  579.             break;
  580.         case FOURCC_I444:
  581.             p_format->i_bits_per_pixel = 24;
  582.             break;
  583.         case FOURCC_I422:
  584.         case FOURCC_YUY2:
  585.         case FOURCC_UYVY:
  586.             p_format->i_bits_per_pixel = 16;
  587.             p_format->i_bits_per_pixel = 16;
  588.             break;
  589.         case FOURCC_I411:
  590.         case FOURCC_YV12:
  591.         case FOURCC_I420:
  592.         case FOURCC_IYUV:
  593.             p_format->i_bits_per_pixel = 12;
  594.             break;
  595.         case FOURCC_I410:
  596.         case FOURCC_YVU9:
  597.             p_format->i_bits_per_pixel = 9;
  598.             break;
  599.         case FOURCC_Y211:
  600.             p_format->i_bits_per_pixel = 8;
  601.             break;
  602.         case FOURCC_YUVP:
  603.             p_format->i_bits_per_pixel = 8;
  604.             break;
  606.         case FOURCC_RV32:
  607.             p_format->i_bits_per_pixel = 32;
  608.             break;
  609.         case FOURCC_RV24:
  610.             p_format->i_bits_per_pixel = 24;
  611.             break;
  612.         case FOURCC_RV15:
  613.         case FOURCC_RV16:
  614.             p_format->i_bits_per_pixel = 16;
  615.             break;
  616.         case FOURCC_RGB2:
  617.             p_format->i_bits_per_pixel = 8;
  618.             break;
  619.         default:
  620.             p_format->i_bits_per_pixel = 0;
  621.             break;
  622.     }
  623. }
  625. /**
  626.  * Initialise the picture_t fields given chroma/size.
  627.  *
  628.  * This function initializes most of the picture_t fields given a chroma and
  629.  * size. It makes the assumption that stride == width.
  630.  * param p_this The calling object
  631.  * param p_pic Pointer to the picture to initialize
  632.  * param i_chroma The chroma fourcc to set
  633.  * param i_width The width of the picture
  634.  * param i_height The height of the picture
  635.  * param i_aspect The aspect ratio of the picture
  636.  */
  637. int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
  638.                         vlc_fourcc_t i_chroma,
  639.                         int i_width, int i_height, int i_aspect )
  640. {
  641.     int i_index, i_width_aligned, i_height_aligned;
  643.     /* Store default values */
  644.     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
  645.     {
  646.         p_pic->p[i_index].p_pixels = NULL;
  647.         p_pic->p[i_index].i_pixel_pitch = 1;
  648.     }
  650.     p_pic->pf_release = 0;
  651.     p_pic->pf_lock = 0;
  652.     p_pic->pf_unlock = 0;
  653.     p_pic->i_refcount = 0;
  655.     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
  657.     /* Make sure the real dimensions are a multiple of 16 */
  658.     i_width_aligned = (i_width + 15) >> 4 << 4;
  659.     i_height_aligned = (i_height + 15) >> 4 << 4;
  661.     /* Calculate coordinates */
  662.     switch( i_chroma )
  663.     {
  664.         case FOURCC_I411:
  665.             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
  666.             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
  667.             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
  668.             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
  669.             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
  670.             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
  671.             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
  672.             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
  673.             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
  674.             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
  675.             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
  676.             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
  677.             p_pic->i_planes = 3;
  678.             break;
  680.         case FOURCC_I410:
  681.         case FOURCC_YVU9:
  682.             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
  683.             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
  684.             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
  685.             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
  686.             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
  687.             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
  688.             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
  689.             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
  690.             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
  691.             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
  692.             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
  693.             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
  694.             p_pic->i_planes = 3;
  695.             break;
  697.         case FOURCC_YV12:
  698.         case FOURCC_I420:
  699.         case FOURCC_IYUV:
  700.             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
  701.             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
  702.             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
  703.             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
  704.             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
  705.             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
  706.             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
  707.             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
  708.             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
  709.             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
  710.             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
  711.             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
  712.             p_pic->i_planes = 3;
  713.             break;
  715.         case FOURCC_I422:
  716.             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
  717.             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
  718.             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
  719.             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
  720.             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
  721.             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
  722.             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
  723.             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
  724.             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
  725.             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
  726.             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
  727.             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
  728.             p_pic->i_planes = 3;
  729.             break;
  731.         case FOURCC_I444:
  732.             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
  733.             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
  734.             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
  735.             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
  736.             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
  737.             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
  738.             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
  739.             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
  740.             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
  741.             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
  742.             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
  743.             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
  744.             p_pic->i_planes = 3;
  745.             break;
  747.         case FOURCC_YUVA:
  748.             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
  749.             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
  750.             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
  751.             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
  752.             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
  753.             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
  754.             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
  755.             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
  756.             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
  757.             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
  758.             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
  759.             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
  760.             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
  761.             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
  762.             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
  763.             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
  764.             p_pic->i_planes = 4;
  765.             break;
  767.         case FOURCC_YUVP:
  768.             p_pic->p->i_lines = i_height_aligned;
  769.             p_pic->p->i_visible_lines = i_height;
  770.             p_pic->p->i_pitch = i_width_aligned;
  771.             p_pic->p->i_visible_pitch = i_width;
  772.             p_pic->p->i_pixel_pitch = 8;
  773.             p_pic->i_planes = 1;
  774.             break;
  776.         case FOURCC_Y211:
  777.             p_pic->p->i_lines = i_height_aligned;
  778.             p_pic->p->i_visible_lines = i_height;
  779.             p_pic->p->i_pitch = i_width_aligned;
  780.             p_pic->p->i_visible_pitch = i_width;
  781.             p_pic->p->i_pixel_pitch = 4;
  782.             p_pic->i_planes = 1;
  783.             break;
  785.         case FOURCC_UYVY:
  786.         case FOURCC_YUY2:
  787.             p_pic->p->i_lines = i_height_aligned;
  788.             p_pic->p->i_visible_lines = i_height;
  789.             p_pic->p->i_pitch = i_width_aligned * 2;
  790.             p_pic->p->i_visible_pitch = i_width * 2;
  791.             p_pic->p->i_pixel_pitch = 4;
  792.             p_pic->i_planes = 1;
  793.             break;
  795.         case FOURCC_RGB2:
  796.             p_pic->p->i_lines = i_height_aligned;
  797.             p_pic->p->i_visible_lines = i_height;
  798.             p_pic->p->i_pitch = i_width_aligned;
  799.             p_pic->p->i_visible_pitch = i_width;
  800.             p_pic->p->i_pixel_pitch = 1;
  801.             p_pic->i_planes = 1;
  802.             break;
  804.         case FOURCC_RV15:
  805.             p_pic->p->i_lines = i_height_aligned;
  806.             p_pic->p->i_visible_lines = i_height;
  807.             p_pic->p->i_pitch = i_width_aligned * 2;
  808.             p_pic->p->i_visible_pitch = i_width * 2;
  809.             p_pic->p->i_pixel_pitch = 2;
  810.             p_pic->i_planes = 1;
  811.             break;
  813.         case FOURCC_RV16:
  814.             p_pic->p->i_lines = i_height_aligned;
  815.             p_pic->p->i_visible_lines = i_height;
  816.             p_pic->p->i_pitch = i_width_aligned * 2;
  817.             p_pic->p->i_visible_pitch = i_width * 2;
  818.             p_pic->p->i_pixel_pitch = 2;
  819.             p_pic->i_planes = 1;
  820.             break;
  822.         case FOURCC_RV24:
  823.             p_pic->p->i_lines = i_height_aligned;
  824.             p_pic->p->i_visible_lines = i_height;
  825.             p_pic->p->i_pitch = i_width_aligned * 3;
  826.             p_pic->p->i_visible_pitch = i_width * 3;
  827.             p_pic->p->i_pixel_pitch = 3;
  828.             p_pic->i_planes = 1;
  829.             break;
  831.         case FOURCC_RV32:
  832.             p_pic->p->i_lines = i_height_aligned;
  833.             p_pic->p->i_visible_lines = i_height;
  834.             p_pic->p->i_pitch = i_width_aligned * 4;
  835.             p_pic->p->i_visible_pitch = i_width * 4;
  836.             p_pic->p->i_pixel_pitch = 4;
  837.             p_pic->i_planes = 1;
  838.             break;
  840.         default:
  841.             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
  842.                              i_chroma, (char*)&i_chroma );
  843.             p_pic->i_planes = 0;
  844.             return VLC_EGENERIC;
  845.     }
  847.     return VLC_SUCCESS;
  848. }
  850. /**
  851.  * Compare two chroma values
  852.  *
  853.  * This function returns 1 if the two fourcc values given as argument are
  854.  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
  855.  */
  856. int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
  857. {
  858.     /* If they are the same, they are the same ! */
  859.     if( i_chroma == i_amorhc )
  860.     {
  861.         return 1;
  862.     }
  864.     /* Check for equivalence classes */
  865.     switch( i_chroma )
  866.     {
  867.         case FOURCC_I420:
  868.         case FOURCC_IYUV:
  869.         case FOURCC_YV12:
  870.             switch( i_amorhc )
  871.             {
  872.                 case FOURCC_I420:
  873.                 case FOURCC_IYUV:
  874.                 case FOURCC_YV12:
  875.                     return 1;
  877.                 default:
  878.                     return 0;
  879.             }
  881.         case FOURCC_UYVY:
  882.         case FOURCC_UYNV:
  883.         case FOURCC_Y422:
  884.             switch( i_amorhc )
  885.             {
  886.                 case FOURCC_UYVY:
  887.                 case FOURCC_UYNV:
  888.                 case FOURCC_Y422:
  889.                     return 1;
  891.                 default:
  892.                     return 0;
  893.             }
  895.         case FOURCC_YUY2:
  896.         case FOURCC_YUNV:
  897.             switch( i_amorhc )
  898.             {
  899.                 case FOURCC_YUY2:
  900.                 case FOURCC_YUNV:
  901.                     return 1;
  903.                 default:
  904.                     return 0;
  905.             }
  907.         default:
  908.             return 0;
  909.     }
  910. }
  912. /*****************************************************************************
  913.  * vout_CopyPicture: copy a picture to another one
  914.  *****************************************************************************
  915.  * This function takes advantage of the image format, and reduces the
  916.  * number of calls to memcpy() to the minimum. Source and destination
  917.  * images must have same width (hence i_visible_pitch), height, and chroma.
  918.  *****************************************************************************/
  919. void __vout_CopyPicture( vlc_object_t *p_this,
  920.                          picture_t *p_dest, picture_t *p_src )
  921. {
  922.     int i;
  924.     for( i = 0; i < p_src->i_planes ; i++ )
  925.     {
  926.         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
  927.         {
  928.             /* There are margins, but with the same width : perfect ! */
  929.             p_this->p_vlc->pf_memcpy(
  930.                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
  931.                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
  932.         }
  933.         else
  934.         {
  935.             /* We need to proceed line by line */
  936.             uint8_t *p_in = p_src->p[i].p_pixels;
  937.             uint8_t *p_out = p_dest->p[i].p_pixels;
  938.             int i_line;
  940.             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
  941.             {
  942.                 p_this->p_vlc->pf_memcpy( p_out, p_in,
  943.                                           p_src->p[i].i_visible_pitch );
  944.                 p_in += p_src->p[i].i_pitch;
  945.                 p_out += p_dest->p[i].i_pitch;
  946.             }
  947.         }
  948.     }
  950.     p_dest->date = p_src->date;
  951.     p_dest->b_force = p_src->b_force;
  952.     p_dest->i_nb_fields = p_src->i_nb_fields;
  953.     p_dest->b_progressive = p_src->b_progressive;
  954.     p_dest->b_top_field_first = p_src->b_top_field_first;
  955. }