git.sesse.net Git - vlc/blob - include/vlc_filter.h

   1 /*****************************************************************************
   2  * vlc_filter.h: filter related structures
   3  *****************************************************************************
   4  * Copyright (C) 1999-2003 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.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  *****************************************************************************/
  23
  24 #if !defined( __LIBVLC__ )
  25   #error You are not libvlc or one of its plugins. You cannot include this file
  26 #endif
  27
  28 #ifndef _VLC_FILTER_H
  29 #define _VLC_FILTER_H 1
  30
  31 #include <vlc_es.h>
  32
  33 /**
  34  * \file
  35  * This file defines the structure and types used by video and audio filters
  36  */
  37
  38 typedef struct filter_owner_sys_t filter_owner_sys_t;
  39
  40 /** Structure describing a filter
  41  * @warning BIG FAT WARNING : the code relies in the first 4 members of
  42  * filter_t and decoder_t to be the same, so if you have anything to add,
  43  * do it at the end of the structure.
  44  */
  45 struct filter_t
  46 {
  47     VLC_COMMON_MEMBERS
  48
  49     /* Module properties */
  50     module_t *          p_module;
  51     filter_sys_t *      p_sys;
  52
  53     /* Input format */
  54     es_format_t         fmt_in;
  55
  56     /* Output format of filter */
  57     es_format_t         fmt_out;
  58
  59     /* Filter configuration */
  60     config_chain_t *    p_cfg;
  61
  62     picture_t *         ( * pf_video_filter ) ( filter_t *, picture_t * );
  63     block_t *           ( * pf_audio_filter ) ( filter_t *, block_t * );
  64     void                ( * pf_video_blend )  ( filter_t *, picture_t *,
  65                                                 picture_t *, picture_t *,
  66                                                 int, int, int );
  67
  68     subpicture_t *      ( *pf_sub_filter ) ( filter_t *, mtime_t );
  69     int                 ( *pf_render_text ) ( filter_t *, subpicture_region_t *,
  70                                               subpicture_region_t * );
  71     int                 ( *pf_render_html ) ( filter_t *, subpicture_region_t *,
  72                                               subpicture_region_t * );
  73
  74     /*
  75      * Buffers allocation
  76      */
  77
  78     /* Audio output callbacks */
  79     block_t *       ( * pf_audio_buffer_new) ( filter_t *, int );
  80
  81     /* Video output callbacks */
  82     picture_t     * ( * pf_vout_buffer_new) ( filter_t * );
  83     void            ( * pf_vout_buffer_del) ( filter_t *, picture_t * );
  84     void            ( * pf_picture_link)    ( picture_t * );
  85     void            ( * pf_picture_unlink)  ( picture_t * );
  86
  87     /* SPU output callbacks */
  88     subpicture_t *  ( * pf_sub_buffer_new) ( filter_t * );
  89     void            ( * pf_sub_buffer_del) ( filter_t *, subpicture_t * );
  90
  91     /* Private structure for the owner of the decoder */
  92     filter_owner_sys_t *p_owner;
  93 };
  94
  95
  96 /**
  97  * Create a picture_t *(*)( filter_t *, picture_t * ) compatible wrapper
  98  * using a void (*)( filter_t *, picture_t *, picture_t * ) function
  99  *
 100  * Currently used by the chroma video filters
 101  */
 102 #define VIDEO_FILTER_WRAPPER( name )                                    \
 103     static picture_t *name ## _Filter ( filter_t *p_filter,             \
 104                                         picture_t *p_pic )              \
 105     {                                                                   \
 106         picture_t *p_outpic = p_filter->pf_vout_buffer_new( p_filter ); \
 107         if( !p_outpic )                                                 \
 108         {                                                               \
 109             msg_Warn( p_filter, "can't get output picture" );           \
 110             if( p_pic->pf_release )                                     \
 111                 p_pic->pf_release( p_pic );                             \
 112             return NULL;                                                \
 113         }                                                               \
 114                                                                         \
 115         name( p_filter, p_pic, p_outpic );                              \
 116                                                                         \
 117         p_outpic->date = p_pic->date;                                   \
 118         p_outpic->b_force = p_pic->b_force;                             \
 119         p_outpic->i_nb_fields = p_pic->i_nb_fields;                     \
 120         p_outpic->b_progressive = p_pic->b_progressive;                 \
 121         p_outpic->b_top_field_first = p_pic->b_top_field_first;         \
 122                                                                         \
 123         if( p_pic->pf_release )                                         \
 124             p_pic->pf_release( p_pic );                                 \
 125         return p_outpic;                                                \
 126     }
 127
 128 #endif /* _VLC_FILTER_H */