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yuy2_i420.c
资源名称：vlc-1.0.5.zip　[点击查看]
上传用户：kjfoods
上传日期：2020-07-06
资源大小：29949k
文件大小：14k
源码类别：

midi

开发平台：

Unix_Linux

yuy2_i420.c：源码内容
  1. /*****************************************************************************
  2.  * yuy2_i420.c : Packed YUV 4:2:2 to Planar YUV conversion module for vlc
  3.  *****************************************************************************
  4.  * Copyright (C) 2007 the VideoLAN team
  5.  * $Id: 3f3e8822cedfb54cc1ca7cc5e6a97ee21981089a $
  6.  *
  7.  * Authors: Antoine Cellerier <dionoea at videolan dot org>
  8.  *
  9.  * This program is free software; you can redistribute it and/or modify
  10.  * it under the terms of the GNU General Public License as published by
  11.  * the Free Software Foundation; either version 2 of the License, or
  12.  * (at your option) any later version.
  13.  *
  14.  * This program is distributed in the hope that it will be useful,
  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17.  * GNU General Public License for more details.
  18.  *
  19.  * You should have received a copy of the GNU General Public License
  20.  * along with this program; if not, write to the Free Software
  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22.  *****************************************************************************/
  24. /*****************************************************************************
  25.  * Preamble
  26.  *****************************************************************************/
  28. #ifdef HAVE_CONFIG_H
  29. # include "config.h"
  30. #endif
  32. #include <vlc_common.h>
  33. #include <vlc_plugin.h>
  34. #include <vlc_filter.h>
  35. #include <vlc_vout.h>
  37. #define SRC_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422,cyuv"
  38. #define DEST_FOURCC  "I420"
  40. /*****************************************************************************
  41.  * Local and extern prototypes.
  42.  *****************************************************************************/
  43. static int  Activate ( vlc_object_t * );
  45. static void YUY2_I420           ( filter_t *, picture_t *, picture_t * );
  46. static void YVYU_I420           ( filter_t *, picture_t *, picture_t * );
  47. static void UYVY_I420           ( filter_t *, picture_t *, picture_t * );
  48. static void cyuv_I420           ( filter_t *, picture_t *, picture_t * );
  50. static picture_t *YUY2_I420_Filter    ( filter_t *, picture_t * );
  51. static picture_t *YVYU_I420_Filter    ( filter_t *, picture_t * );
  52. static picture_t *UYVY_I420_Filter    ( filter_t *, picture_t * );
  53. static picture_t *cyuv_I420_Filter    ( filter_t *, picture_t * );
  55. /*****************************************************************************
  56.  * Module descriptor
  57.  *****************************************************************************/
  58. vlc_module_begin ()
  59.     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
  60.     set_capability( "video filter2", 80 )
  61.     set_callbacks( Activate, NULL )
  62. vlc_module_end ()
  64. /*****************************************************************************
  65.  * Activate: allocate a chroma function
  66.  *****************************************************************************
  67.  * This function allocates and initializes a chroma function
  68.  *****************************************************************************/
  69. static int Activate( vlc_object_t *p_this )
  70. {
  71.     filter_t *p_filter = (filter_t *)p_this;
  73.     if( p_filter->fmt_in.video.i_width & 1
  74.      || p_filter->fmt_in.video.i_height & 1 )
  75.     {
  76.         return -1;
  77.     }
  79.     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
  80.      || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
  81.         return -1;
  83.     switch( p_filter->fmt_out.video.i_chroma )
  84.     {
  85.         case VLC_FOURCC('I','4','2','0'):
  86.             switch( p_filter->fmt_in.video.i_chroma )
  87.             {
  88.                 case VLC_FOURCC('Y','U','Y','2'):
  89.                 case VLC_FOURCC('Y','U','N','V'):
  90.                     p_filter->pf_video_filter = YUY2_I420_Filter;
  91.                     break;
  93.                 case VLC_FOURCC('Y','V','Y','U'):
  94.                     p_filter->pf_video_filter = YVYU_I420_Filter;
  95.                     break;
  97.                 case VLC_FOURCC('U','Y','V','Y'):
  98.                 case VLC_FOURCC('U','Y','N','V'):
  99.                 case VLC_FOURCC('Y','4','2','2'):
  100.                     p_filter->pf_video_filter = UYVY_I420_Filter;
  101.                     break;
  103.                 case VLC_FOURCC('c','y','u','v'):
  104.                     p_filter->pf_video_filter = cyuv_I420_Filter;
  105.                     break;
  107.                 default:
  108.                     return -1;
  109.             }
  110.             break;
  112.         default:
  113.             return -1;
  114.     }
  115.     return 0;
  116. }
  118. /* Following functions are local */
  119. VIDEO_FILTER_WRAPPER( YUY2_I420 )
  120. VIDEO_FILTER_WRAPPER( YVYU_I420 )
  121. VIDEO_FILTER_WRAPPER( UYVY_I420 )
  122. VIDEO_FILTER_WRAPPER( cyuv_I420 )
  124. /*****************************************************************************
  125.  * YUY2_I420: packed YUY2 4:2:2 to planar YUV 4:2:0
  126.  *****************************************************************************/
  127. static void YUY2_I420( filter_t *p_filter, picture_t *p_source,
  128.                                            picture_t *p_dest )
  129. {
  130.     uint8_t *p_line = p_source->p->p_pixels;
  132.     uint8_t *p_y = p_dest->Y_PIXELS;
  133.     uint8_t *p_u = p_dest->U_PIXELS;
  134.     uint8_t *p_v = p_dest->V_PIXELS;
  136.     int i_x, i_y;
  138.     const int i_dest_margin = p_dest->p[0].i_pitch
  139.                                  - p_dest->p[0].i_visible_pitch;
  140.     const int i_dest_margin_c = p_dest->p[1].i_pitch
  141.                                  - p_dest->p[1].i_visible_pitch;
  142.     const int i_source_margin = p_source->p->i_pitch
  143.                                - p_source->p->i_visible_pitch;
  145.     bool b_skip = false;
  147.     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
  148.     {
  149.         if( b_skip )
  150.         {
  151.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  152.             {
  153.     #define C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v )      
  154.                 *p_y++ = *p_line++; p_line++; 
  155.                 *p_y++ = *p_line++; p_line++
  156.                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
  157.                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
  158.                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
  159.                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
  160.             }
  161.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  162.             {
  163.                 C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
  164.             }
  165.         }
  166.         else
  167.         {
  168.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  169.             {
  170.     #define C_YUYV_YUV422( p_line, p_y, p_u, p_v )      
  171.                 *p_y++ = *p_line++; *p_u++ = *p_line++; 
  172.                 *p_y++ = *p_line++; *p_v++ = *p_line++
  173.                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
  174.                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
  175.                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
  176.                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
  177.             }
  178.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  179.             {
  180.                 C_YUYV_YUV422( p_line, p_y, p_u, p_v );
  181.             }
  182.         }
  183.         p_line += i_source_margin;
  184.         p_y += i_dest_margin;
  185.         p_u += i_dest_margin_c;
  186.         p_v += i_dest_margin_c;
  188.         b_skip = !b_skip;
  189.     }
  190. }
  192. /*****************************************************************************
  193.  * YVYU_I420: packed YVYU 4:2:2 to planar YUV 4:2:0
  194.  *****************************************************************************/
  195. static void YVYU_I420( filter_t *p_filter, picture_t *p_source,
  196.                                            picture_t *p_dest )
  197. {
  198.     uint8_t *p_line = p_source->p->p_pixels;
  200.     uint8_t *p_y = p_dest->Y_PIXELS;
  201.     uint8_t *p_u = p_dest->U_PIXELS;
  202.     uint8_t *p_v = p_dest->V_PIXELS;
  204.     int i_x, i_y;
  206.     const int i_dest_margin = p_dest->p[0].i_pitch
  207.                                  - p_dest->p[0].i_visible_pitch;
  208.     const int i_dest_margin_c = p_dest->p[1].i_pitch
  209.                                  - p_dest->p[1].i_visible_pitch;
  210.     const int i_source_margin = p_source->p->i_pitch
  211.                                - p_source->p->i_visible_pitch;
  213.     bool b_skip = false;
  215.     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
  216.     {
  217.         if( b_skip )
  218.         {
  219.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  220.             {
  221.     #define C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v )      
  222.                 *p_y++ = *p_line++; p_line++; 
  223.                 *p_y++ = *p_line++; p_line++
  224.                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
  225.                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
  226.                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
  227.                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
  228.             }
  229.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  230.             {
  231.                 C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
  232.             }
  233.         }
  234.         else
  235.         {
  236.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  237.             {
  238.     #define C_YVYU_YUV422( p_line, p_y, p_u, p_v )      
  239.                 *p_y++ = *p_line++; *p_v++ = *p_line++; 
  240.                 *p_y++ = *p_line++; *p_u++ = *p_line++
  241.                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
  242.                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
  243.                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
  244.                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
  245.             }
  246.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  247.             {
  248.                 C_YVYU_YUV422( p_line, p_y, p_u, p_v );
  249.             }
  250.         }
  251.         p_line += i_source_margin;
  252.         p_y += i_dest_margin;
  253.         p_u += i_dest_margin_c;
  254.         p_v += i_dest_margin_c;
  256.         b_skip = !b_skip;
  257.     }
  258. }
  260. /*****************************************************************************
  261.  * UYVY_I420: packed UYVY 4:2:2 to planar YUV 4:2:0
  262.  *****************************************************************************/
  263. static void UYVY_I420( filter_t *p_filter, picture_t *p_source,
  264.                                            picture_t *p_dest )
  265. {
  266.     uint8_t *p_line = p_source->p->p_pixels;
  268.     uint8_t *p_y = p_dest->Y_PIXELS;
  269.     uint8_t *p_u = p_dest->U_PIXELS;
  270.     uint8_t *p_v = p_dest->V_PIXELS;
  272.     int i_x, i_y;
  274.     const int i_dest_margin = p_dest->p[0].i_pitch
  275.                                  - p_dest->p[0].i_visible_pitch;
  276.     const int i_dest_margin_c = p_dest->p[1].i_pitch
  277.                                  - p_dest->p[1].i_visible_pitch;
  278.     const int i_source_margin = p_source->p->i_pitch
  279.                                - p_source->p->i_visible_pitch;
  281.     bool b_skip = false;
  283.     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
  284.     {
  285.         if( b_skip )
  286.         {
  287.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  288.             {
  289.     #define C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v )      
  290.                 *p_u++ = *p_line++; p_line++; 
  291.                 *p_v++ = *p_line++; p_line++
  292.                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
  293.                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
  294.                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
  295.                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
  296.             }
  297.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  298.             {
  299.                 C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
  300.             }
  301.         }
  302.         else
  303.         {
  304.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  305.             {
  306.     #define C_UYVY_YUV422( p_line, p_y, p_u, p_v )      
  307.                 *p_u++ = *p_line++; *p_y++ = *p_line++; 
  308.                 *p_v++ = *p_line++; *p_y++ = *p_line++
  309.                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
  310.                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
  311.                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
  312.                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
  313.             }
  314.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  315.             {
  316.                 C_UYVY_YUV422( p_line, p_y, p_u, p_v );
  317.             }
  318.         }
  319.         p_line += i_source_margin;
  320.         p_y += i_dest_margin;
  321.         p_u += i_dest_margin_c;
  322.         p_v += i_dest_margin_c;
  324.         b_skip = !b_skip;
  325.     }
  326. }
  328. /*****************************************************************************
  329.  * cyuv_I420: upside-down packed UYVY 4:2:2 to planar YUV 4:2:0
  330.  * FIXME
  331.  *****************************************************************************/
  332. static void cyuv_I420( filter_t *p_filter, picture_t *p_source,
  333.                                            picture_t *p_dest )
  334. {
  335.     uint8_t *p_line = p_source->p->p_pixels;
  337.     uint8_t *p_y = p_dest->Y_PIXELS;
  338.     uint8_t *p_u = p_dest->U_PIXELS;
  339.     uint8_t *p_v = p_dest->V_PIXELS;
  341.     int i_x, i_y;
  343.     const int i_dest_margin = p_dest->p[0].i_pitch
  344.                                  - p_dest->p[0].i_visible_pitch;
  345.     const int i_dest_margin_c = p_dest->p[1].i_pitch
  346.                                  - p_dest->p[1].i_visible_pitch;
  347.     const int i_source_margin = p_source->p->i_pitch
  348.                                - p_source->p->i_visible_pitch;
  350.     bool b_skip = false;
  352.     for( i_y = p_filter->fmt_out.video.i_height ; i_y-- ; )
  353.     {
  354.         if( b_skip )
  355.         {
  356.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  357.             {
  358.     #define C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v )      
  359.                 *p_y++ = *p_line++; p_line++; 
  360.                 *p_y++ = *p_line++; p_line++
  361.                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
  362.                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
  363.                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
  364.                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
  365.             }
  366.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  367.             {
  368.                 C_cyuv_YUV422_skip( p_line, p_y, p_u, p_v );
  369.             }
  370.         }
  371.         else
  372.         {
  373.             for( i_x = p_filter->fmt_out.video.i_width / 8 ; i_x-- ; )
  374.             {
  375.     #define C_cyuv_YUV422( p_line, p_y, p_u, p_v )      
  376.                 *p_y++ = *p_line++; *p_v++ = *p_line++; 
  377.                 *p_y++ = *p_line++; *p_u++ = *p_line++
  378.                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
  379.                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
  380.                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
  381.                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
  382.             }
  383.             for( i_x = ( p_filter->fmt_out.video.i_width % 8 ) / 2; i_x-- ; )
  384.             {
  385.                 C_cyuv_YUV422( p_line, p_y, p_u, p_v );
  386.             }
  387.         }
  388.         p_line += i_source_margin;
  389.         p_y += i_dest_margin;
  390.         p_u += i_dest_margin_c;
  391.         p_v += i_dest_margin_c;
  393.         b_skip = !b_skip;
  394.     }
  395. }