mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
451 lines
16 KiB
C
451 lines
16 KiB
C
/*****************************************************************************
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* motiondetect.c : Motion detect video effect plugin for vlc
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*****************************************************************************
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* Copyright (C) 2005 the VideoLAN team
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* $Id$
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*
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* Authors: Jérôme Decoodt <djc@videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <stdlib.h> /* malloc(), free() */
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#include <string.h>
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#include <vlc/vlc.h>
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#include <vlc/vout.h>
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#include <vlc/intf.h>
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#include "filter_common.h"
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#include "charset.h"
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Create ( vlc_object_t * );
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static void Destroy ( vlc_object_t * );
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static int Init ( vout_thread_t * );
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static void End ( vout_thread_t * );
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static void Render ( vout_thread_t *, picture_t * );
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static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
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picture_t *p_outpic );
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static int SendEvents ( vlc_object_t *, char const *,
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vlc_value_t, vlc_value_t, void * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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#define DESC_TEXT N_("Description file")
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#define DESC_LONGTEXT N_("A file containing a simple playlist")
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#define HISTORY_TEXT N_("History parameter")
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/// \bug [String] typo
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#define HISTORY_LONGTEXT N_("The umber of frames used for detection.")
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vlc_module_begin();
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set_description( _("Motion detect video filter") );
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set_shortname( N_( "Motion detect" ));
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set_category( CAT_VIDEO );
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set_subcategory( SUBCAT_VIDEO_VFILTER );
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set_capability( "video filter", 0 );
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add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
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HISTORY_LONGTEXT, VLC_FALSE );
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add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
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DESC_LONGTEXT, VLC_FALSE );
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set_callbacks( Create, Destroy );
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vlc_module_end();
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/*****************************************************************************
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* vout_sys_t: Motion detect video output method descriptor
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*****************************************************************************
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* This structure is part of the video output thread descriptor.
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* It describes the Motion detect specific properties of an output thread.
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*****************************************************************************/
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typedef struct area_t
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{
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int i_x1, i_y1;
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int i_x2, i_y2;
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int i_matches;
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int i_level;
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int i_downspeed, i_upspeed;
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char *psz_mrl;
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} area_t;
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struct vout_sys_t
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{
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vout_thread_t *p_vout;
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playlist_t *p_playlist;
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uint8_t *p_bufferY;
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int i_stack;
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area_t** pp_areas;
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int i_areas;
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int i_history;
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};
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/*****************************************************************************
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* Control: control facility for the vout (forwards to child vout)
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*****************************************************************************/
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static int Control( vout_thread_t *p_vout, int i_query, va_list args )
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{
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return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
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}
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/*****************************************************************************
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* Create: allocates Distort video thread output method
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*****************************************************************************
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* This function allocates and initializes a Distort vout method.
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*****************************************************************************/
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static int Create( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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char *psz_descfilename;
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char buffer[256];
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int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
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area_t *p_area;
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FILE * p_file;
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/* Allocate structure */
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p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
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if( p_vout->p_sys == NULL )
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{
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msg_Err( p_vout, "out of memory" );
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return VLC_ENOMEM;
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}
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p_vout->pf_init = Init;
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p_vout->pf_end = End;
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p_vout->pf_manage = NULL;
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p_vout->pf_render = Render;
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p_vout->pf_display = NULL;
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p_vout->pf_control = Control;
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memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
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p_vout->p_sys->i_history = config_GetInt( p_vout,
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"motiondetect-history" );
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if( !(psz_descfilename = config_GetPsz( p_vout,
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"motiondetect-description" ) ) )
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{
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free( p_vout->p_sys );
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return VLC_EGENERIC;
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}
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p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
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FIND_ANYWHERE );
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if( !p_vout->p_sys->p_playlist )
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{
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msg_Err( p_vout, "playlist not found" );
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free( p_vout->p_sys );
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return VLC_EGENERIC;
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}
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/* Parse description file and allocate areas */
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p_file = utf8_fopen( psz_descfilename, "r" );
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if( !p_file )
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{
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msg_Err( p_this, "Failed to open description file %s",
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psz_descfilename );
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free( psz_descfilename );
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free( p_vout->p_sys );
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return VLC_EGENERIC;
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}
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p_vout->p_sys->i_areas = 0;
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while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
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&x1, &y1, &x2, &y2, &i_level,
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&i_downspeed, &i_upspeed ) == 7 )
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{
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for( i = 0 ; i < 255 ; i++ )
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{
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fread( buffer + i, 1, 1, p_file );
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if( *( buffer + i ) == '\n' )
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break;
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}
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*( buffer + i ) = 0;
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p_vout->p_sys->i_areas++;
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p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
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p_vout->p_sys->i_areas *
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sizeof( area_t ) );
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if( !p_vout->p_sys->pp_areas )
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/*FIXME: clean this... */
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return VLC_ENOMEM;
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p_area = malloc( sizeof( area_t ) );
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if( !p_area )
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break;
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p_area->i_x1 = x1;
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p_area->i_x2 = x2;
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p_area->i_y1 = y1;
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p_area->i_y2 = y2;
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p_area->i_matches = 0;
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p_area->i_level = i_level;
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p_area->i_downspeed = i_downspeed;
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p_area->i_upspeed = i_upspeed;
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p_area->psz_mrl = strdup(buffer);
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p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
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}
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fclose( p_file );
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Init: initialize Motion detect video thread output method
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*****************************************************************************/
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static int Init( vout_thread_t *p_vout )
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{
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int i_index;
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picture_t *p_pic;
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video_format_t fmt = {0};
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I_OUTPUTPICTURES = 0;
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/* Initialize the output structure */
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p_vout->output.i_chroma = p_vout->render.i_chroma;
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p_vout->output.i_width = p_vout->render.i_width;
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p_vout->output.i_height = p_vout->render.i_height;
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p_vout->output.i_aspect = p_vout->render.i_aspect;
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p_vout->fmt_out = p_vout->fmt_in;
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fmt = p_vout->fmt_out;
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/* Try to open the real video output */
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msg_Dbg( p_vout, "spawning the real video output" );
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p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
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/* Everything failed */
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if( p_vout->p_sys->p_vout == NULL )
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{
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msg_Err( p_vout, "cannot open vout, aborting" );
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return VLC_EGENERIC;
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}
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ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
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ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
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ADD_PARENT_CALLBACKS( SendEventsToChild );
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* End: terminate Motion detect video thread output method
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*****************************************************************************/
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static void End( vout_thread_t *p_vout )
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{
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int i_index;
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/* Free the fake output buffers we allocated */
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for( i_index = I_OUTPUTPICTURES ; i_index ; )
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{
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i_index--;
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free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
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}
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}
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/*****************************************************************************
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* Destroy: destroy Motion detect video thread output method
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*****************************************************************************
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* Terminate an output method created by DistortCreateOutputMethod
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*****************************************************************************/
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static void Destroy( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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int i;
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if( p_vout->p_sys->p_vout )
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{
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DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
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vlc_object_detach( p_vout->p_sys->p_vout );
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vout_Destroy( p_vout->p_sys->p_vout );
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}
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DEL_PARENT_CALLBACKS( SendEventsToChild );
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for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
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{
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free( p_vout->p_sys->pp_areas[i]->psz_mrl );
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free( p_vout->p_sys->pp_areas[i] );
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}
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free( p_vout->p_sys->pp_areas );
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free( p_vout->p_sys );
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}
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/*****************************************************************************
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* Render: displays previously rendered output
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*****************************************************************************
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* This function send the currently rendered image to Distort image, waits
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* until it is displayed and switch the two rendering buffers, preparing next
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* frame.
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*****************************************************************************/
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static void Render( vout_thread_t *p_vout, picture_t *p_pic )
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{
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picture_t *p_outpic;
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/* This is a new frame. Get a structure from the video_output. */
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while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
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== NULL )
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{
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if( p_vout->b_die || p_vout->b_error )
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{
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return;
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}
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msleep( VOUT_OUTMEM_SLEEP );
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}
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vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
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MotionDetect( p_vout, p_pic, p_outpic );
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vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
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}
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/*****************************************************************************
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* MotionDetect: calculates new matches
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*****************************************************************************/
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static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
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picture_t *p_outpic )
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{
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#define pp_curent_area p_vout->p_sys->pp_areas[i_area]
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int i_index, i_index_col, i_area;
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for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
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{
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int i_line, i_num_lines, i_offset, i_size, i_diff;
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uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
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p_in = p_inpic->p[i_index].p_pixels;
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p_out = p_outpic->p[i_index].p_pixels;
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i_num_lines = p_inpic->p[i_index].i_visible_lines;
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i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
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p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
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switch( i_index )
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{
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case Y_PLANE:
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p_buffer = p_vout->p_sys->p_bufferY;
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if( p_buffer == NULL)
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{
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p_buffer = malloc( p_vout->p_sys->i_history * i_size);
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memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
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p_vout->p_sys->p_bufferY = p_buffer;
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p_vout->p_sys->i_stack = 0;
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}
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i_offset = i_size * p_vout->p_sys->i_stack;
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p_last_in = p_buffer + i_offset;
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for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
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{
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int i_tmp = 0, i_nb_pixels;
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p_last_in = p_buffer + i_offset;
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p_in = p_inpic->p[i_index].p_pixels;
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p_out = p_outpic->p[i_index].p_pixels;
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if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
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( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
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continue;
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if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
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pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
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if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
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pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
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for( i_line = pp_curent_area->i_y1 ;
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i_line < pp_curent_area->i_y2 ; i_line++ )
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{
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for( i_index_col = pp_curent_area->i_x1 ;
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i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
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{
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i_diff = (*(p_last_in + i_index_col +
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i_line * p_inpic->p[i_index].i_pitch)
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- *(p_in + i_index_col +
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i_line * p_inpic->p[i_index].i_pitch));
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if( i_diff < 0)
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i_diff = -i_diff;
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if( i_diff > pp_curent_area->i_level )
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i_tmp += pp_curent_area->i_upspeed;
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*( p_out + i_index_col + i_line *
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p_inpic->p[i_index].i_pitch ) =
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pp_curent_area->i_matches;
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}
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}
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i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
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( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
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pp_curent_area->i_matches += i_tmp / i_nb_pixels -
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pp_curent_area->i_downspeed;
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if( pp_curent_area->i_matches < 0)
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pp_curent_area->i_matches = 0;
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if( pp_curent_area->i_matches > 255)
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{
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playlist_item_t *p_item = playlist_ItemNew( p_vout,
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(const char*)pp_curent_area->psz_mrl,
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pp_curent_area->psz_mrl );
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msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
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pp_curent_area->psz_mrl );
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playlist_Control( p_vout->p_sys->p_playlist,
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PLAYLIST_VIEWPLAY, NULL, p_item );
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pp_curent_area->i_matches = 0;
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}
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}
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p_last_in = p_buffer + i_offset;
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p_in = p_inpic->p[i_index].p_pixels;
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p_out = p_outpic->p[i_index].p_pixels;
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p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
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break;
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default:
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break;
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}
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}
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p_vout->p_sys->i_stack++;
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if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
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p_vout->p_sys->i_stack = 0;
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#undef pp_curent_area
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}
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/*****************************************************************************
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* SendEvents: forward mouse and keyboard events to the parent p_vout
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*****************************************************************************/
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static int SendEvents( vlc_object_t *p_this, char const *psz_var,
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vlc_value_t oldval, vlc_value_t newval, void *p_data )
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{
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var_Set( (vlc_object_t *)p_data, psz_var, newval );
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* SendEventsToChild: forward events to the child/children vout
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*****************************************************************************/
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static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
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vlc_value_t oldval, vlc_value_t newval, void *p_data )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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var_Set( p_vout->p_sys->p_vout, psz_var, newval );
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return VLC_SUCCESS;
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}
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