--- /dev/null
+/*****************************************************************************
+ * motiondetect.c : Motion detect video effect plugin for vlc
+ *****************************************************************************
+ * Copyright (C) 2005 VideoLAN
+ * $Id: $
+ *
+ * Authors: Jérôme Decoodt <djc@videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+#include <string.h>
+
+#include <vlc/vlc.h>
+#include <vlc/vout.h>
+#include <vlc/intf.h>
+
+#include "filter_common.h"
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Create ( vlc_object_t * );
+static void Destroy ( vlc_object_t * );
+
+static int Init ( vout_thread_t * );
+static void End ( vout_thread_t * );
+static void Render ( vout_thread_t *, picture_t * );
+static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
+ picture_t *p_outpic );
+
+static int SendEvents ( vlc_object_t *, char const *,
+ vlc_value_t, vlc_value_t, void * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+#define DESC_TEXT N_("Description file")
+#define DESC_LONGTEXT N_("Description file, file containing simple playlist")
+#define HISTORY_TEXT N_("History parameter")
+#define HISTORY_LONGTEXT N_("History parameter, number of frames used for detection")
+
+vlc_module_begin();
+ set_description( _("Motion detect video filter") );
+ set_shortname( N_( "Motion detect" ));
+ set_capability( "video filter", 0 );
+ set_category( CAT_VIDEO );
+ set_subcategory( SUBCAT_VIDEO_VFILTER );
+
+ add_integer( "motiondetect-history", 1, NULL, HISTORY_TEXT,
+ HISTORY_LONGTEXT, VLC_FALSE );
+ add_string( "motiondetect-description", "motiondetect", NULL, DESC_TEXT,
+ DESC_LONGTEXT, VLC_FALSE );
+
+ set_callbacks( Create, Destroy );
+vlc_module_end();
+
+/*****************************************************************************
+ * vout_sys_t: Motion detect video output method descriptor
+ *****************************************************************************
+ * This structure is part of the video output thread descriptor.
+ * It describes the Motion detect specific properties of an output thread.
+ *****************************************************************************/
+typedef struct area_t
+{
+ int i_x1, i_y1;
+ int i_x2, i_y2;
+ int i_matches;
+ int i_level;
+ int i_downspeed, i_upspeed;
+ char *psz_mrl;
+} area_t;
+
+struct vout_sys_t
+{
+ vout_thread_t *p_vout;
+ playlist_t *p_playlist;
+
+ uint8_t *p_bufferY;
+ int i_stack;
+ area_t** pp_areas;
+ int i_areas;
+ int i_history;
+};
+
+/*****************************************************************************
+ * Control: control facility for the vout (forwards to child vout)
+ *****************************************************************************/
+static int Control( vout_thread_t *p_vout, int i_query, va_list args )
+{
+ return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
+}
+
+/*****************************************************************************
+ * Create: allocates Distort video thread output method
+ *****************************************************************************
+ * This function allocates and initializes a Distort vout method.
+ *****************************************************************************/
+static int Create( vlc_object_t *p_this )
+{
+ vout_thread_t *p_vout = (vout_thread_t *)p_this;
+ char *psz_descfilename;
+
+ /* Allocate structure */
+ p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
+ if( p_vout->p_sys == NULL )
+ {
+ msg_Err( p_vout, "out of memory" );
+ return VLC_ENOMEM;
+ }
+
+ p_vout->pf_init = Init;
+ p_vout->pf_end = End;
+ p_vout->pf_manage = NULL;
+ p_vout->pf_render = Render;
+ p_vout->pf_display = NULL;
+ p_vout->pf_control = Control;
+
+ memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
+
+ p_vout->p_sys->i_history = config_GetInt( p_vout,
+ "motiondetect-history" );
+
+ if( !(psz_descfilename = config_GetPsz( p_vout,
+ "motiondetect-description" ) ) )
+ {
+ free( p_vout->p_sys );
+ return VLC_EGENERIC;
+ }
+
+ p_vout->p_sys->p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
+ FIND_ANYWHERE );
+ if( !p_vout->p_sys->p_playlist )
+ {
+ msg_Err( p_vout, "playlist not found" );
+ free( p_vout->p_sys );
+ return VLC_EGENERIC;
+ }
+
+ /* Parse description file and allocate areas */
+ char buffer[256];
+ int x1, x2, y1, y2, i_level, i_downspeed, i_upspeed, i;
+ area_t *p_area;
+ FILE * p_file = fopen( psz_descfilename, "r" );
+ if( !p_file )
+ {
+ msg_Err( p_this, "Failed to open descritpion file %s",
+ psz_descfilename );
+ free( psz_descfilename );
+ free( p_vout->p_sys );
+ return VLC_EGENERIC;
+ }
+ p_vout->p_sys->i_areas = 0;
+ while( fscanf( p_file, "%d,%d,%d,%d,%d,%d,%d,",
+ &x1, &y1, &x2, &y2, &i_level,
+ &i_downspeed, &i_upspeed ) == 7 )
+ {
+ for( i = 0 ; i < 255 ; i++ )
+ {
+ fread( buffer + i, 1, 1, p_file );
+ if( *( buffer + i ) == '\n' )
+ break;
+ }
+ *( buffer + i ) = 0;
+ p_vout->p_sys->i_areas++;
+ p_vout->p_sys->pp_areas = realloc( p_vout->p_sys->pp_areas,
+ p_vout->p_sys->i_areas *
+ sizeof( area_t ) );
+ if( !p_vout->p_sys->pp_areas )
+ /*FIXME: clean this... */
+ return VLC_ENOMEM;
+ p_area = malloc( sizeof( area_t ) );
+ if( !p_area )
+ break;
+
+ p_area->i_x1 = x1;
+ p_area->i_x2 = x2;
+ p_area->i_y1 = y1;
+ p_area->i_y2 = y2;
+ p_area->i_matches = 0;
+ p_area->i_level = i_level;
+ p_area->i_downspeed = i_downspeed;
+ p_area->i_upspeed = i_upspeed;
+
+ p_area->psz_mrl = strdup(buffer);
+ p_vout->p_sys->pp_areas[p_vout->p_sys->i_areas-1] = p_area;
+ }
+ fclose( p_file );
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Init: initialize Motion detect video thread output method
+ *****************************************************************************/
+static int Init( vout_thread_t *p_vout )
+{
+ int i_index;
+ picture_t *p_pic;
+
+ I_OUTPUTPICTURES = 0;
+
+ /* Initialize the output structure */
+ p_vout->output.i_chroma = p_vout->render.i_chroma;
+ p_vout->output.i_width = p_vout->render.i_width;
+ p_vout->output.i_height = p_vout->render.i_height;
+ p_vout->output.i_aspect = p_vout->render.i_aspect;
+
+ /* Try to open the real video output */
+ msg_Dbg( p_vout, "spawning the real video output" );
+
+ p_vout->p_sys->p_vout = vout_Create( p_vout,
+ p_vout->render.i_width, p_vout->render.i_height,
+ p_vout->render.i_chroma, p_vout->render.i_aspect );
+
+ /* Everything failed */
+ if( p_vout->p_sys->p_vout == NULL )
+ {
+ msg_Err( p_vout, "cannot open vout, aborting" );
+ return VLC_EGENERIC;
+ }
+
+ ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
+
+ ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
+
+ ADD_PARENT_CALLBACKS( SendEventsToChild );
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * End: terminate Motion detect video thread output method
+ *****************************************************************************/
+static void End( vout_thread_t *p_vout )
+{
+ int i_index;
+
+ /* Free the fake output buffers we allocated */
+ for( i_index = I_OUTPUTPICTURES ; i_index ; )
+ {
+ i_index--;
+ free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
+ }
+}
+
+/*****************************************************************************
+ * Destroy: destroy Motion detect video thread output method
+ *****************************************************************************
+ * Terminate an output method created by DistortCreateOutputMethod
+ *****************************************************************************/
+static void Destroy( vlc_object_t *p_this )
+{
+ vout_thread_t *p_vout = (vout_thread_t *)p_this;
+ int i;
+
+ if( p_vout->p_sys->p_vout )
+ {
+ DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
+ vlc_object_detach( p_vout->p_sys->p_vout );
+ vout_Destroy( p_vout->p_sys->p_vout );
+ }
+
+ DEL_PARENT_CALLBACKS( SendEventsToChild );
+
+ for( i = 0 ; i < p_vout->p_sys->i_areas ; i++ )
+ {
+ free( p_vout->p_sys->pp_areas[i]->psz_mrl );
+ free( p_vout->p_sys->pp_areas[i] );
+ }
+
+ free( p_vout->p_sys->pp_areas );
+ free( p_vout->p_sys );
+}
+
+/*****************************************************************************
+ * Render: displays previously rendered output
+ *****************************************************************************
+ * This function send the currently rendered image to Distort image, waits
+ * until it is displayed and switch the two rendering buffers, preparing next
+ * frame.
+ *****************************************************************************/
+static void Render( vout_thread_t *p_vout, picture_t *p_pic )
+{
+ picture_t *p_outpic;
+
+ /* This is a new frame. Get a structure from the video_output. */
+ while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
+ == NULL )
+ {
+ if( p_vout->b_die || p_vout->b_error )
+ {
+ return;
+ }
+ msleep( VOUT_OUTMEM_SLEEP );
+ }
+
+ vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
+
+ MotionDetect( p_vout, p_pic, p_outpic );
+
+ vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
+}
+
+/*****************************************************************************
+ * MotionDetect: calculates new matches
+ *****************************************************************************/
+static void MotionDetect( vout_thread_t *p_vout, picture_t *p_inpic,
+ picture_t *p_outpic )
+{
+#define pp_curent_area p_vout->p_sys->pp_areas[i_area]
+
+ int i_index, i_index_col, i_area;
+ for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
+ {
+ int i_line, i_num_lines, i_offset, i_size, i_diff;
+ uint8_t *p_in, *p_out, *p_last_in, *p_buffer;
+
+ p_in = p_inpic->p[i_index].p_pixels;
+ p_out = p_outpic->p[i_index].p_pixels;
+
+ i_num_lines = p_inpic->p[i_index].i_visible_lines;
+ i_size = p_inpic->p[i_index].i_lines * p_inpic->p[i_index].i_pitch;
+
+ p_vout->p_vlc->pf_memcpy( p_out, p_in, i_size );
+ switch( i_index )
+ {
+ case Y_PLANE:
+ p_buffer = p_vout->p_sys->p_bufferY;
+
+ if( p_buffer == NULL)
+ {
+ p_buffer = malloc( p_vout->p_sys->i_history * i_size);
+ memset( p_buffer, 0, p_vout->p_sys->i_history * i_size );
+
+ p_vout->p_sys->p_bufferY = p_buffer;
+ p_vout->p_sys->i_stack = 0;
+ }
+
+ i_offset = i_size * p_vout->p_sys->i_stack;
+ p_last_in = p_buffer + i_offset;
+ for( i_area = 0 ; i_area < p_vout->p_sys->i_areas ; i_area++)
+ {
+ int i_tmp = 0, i_nb_pixels;
+ p_last_in = p_buffer + i_offset;
+ p_in = p_inpic->p[i_index].p_pixels;
+ p_out = p_outpic->p[i_index].p_pixels;
+ if( ( pp_curent_area->i_y1 > p_inpic->p[i_index].i_lines ) ||
+ ( pp_curent_area->i_x1 > p_inpic->p[i_index].i_pitch ) )
+ continue;
+ if( ( pp_curent_area->i_y2 > p_inpic->p[i_index].i_lines ) )
+ pp_curent_area->i_y2 = p_inpic->p[i_index].i_lines;
+ if( ( pp_curent_area->i_x2 > p_inpic->p[i_index].i_pitch ) )
+ pp_curent_area->i_x2 = p_inpic->p[i_index].i_pitch;
+
+ for( i_line = pp_curent_area->i_y1 ;
+ i_line < pp_curent_area->i_y2 ; i_line++ )
+ {
+ for( i_index_col = pp_curent_area->i_x1 ;
+ i_index_col < pp_curent_area->i_x2 ; i_index_col++ )
+ {
+ i_diff = (*(p_last_in + i_index_col +
+ i_line * p_inpic->p[i_index].i_pitch)
+ - *(p_in + i_index_col +
+ i_line * p_inpic->p[i_index].i_pitch));
+ if( i_diff < 0)
+ i_diff = -i_diff;
+
+ if( i_diff > pp_curent_area->i_level )
+ i_tmp += pp_curent_area->i_upspeed;
+
+ *( p_out + i_index_col + i_line *
+ p_inpic->p[i_index].i_pitch ) =
+ pp_curent_area->i_matches;
+ }
+ }
+ i_nb_pixels = ( pp_curent_area->i_y2 - pp_curent_area->i_y1 ) *
+ ( pp_curent_area->i_x2 - pp_curent_area->i_x1 );
+ pp_curent_area->i_matches += i_tmp / i_nb_pixels -
+ pp_curent_area->i_downspeed;
+ if( pp_curent_area->i_matches < 0)
+ pp_curent_area->i_matches = 0;
+ if( pp_curent_area->i_matches > 255)
+ {
+ playlist_item_t *p_item = playlist_ItemNew( p_vout,
+ (const char*)pp_curent_area->psz_mrl,
+ pp_curent_area->psz_mrl );
+ msg_Dbg( p_vout, "Area(%d) matched, going to %s\n", i_area,
+ pp_curent_area->psz_mrl );
+ playlist_Control( p_vout->p_sys->p_playlist,
+ PLAYLIST_ITEMPLAY, p_item );
+ pp_curent_area->i_matches = 0;
+ }
+ }
+ p_last_in = p_buffer + i_offset;
+ p_in = p_inpic->p[i_index].p_pixels;
+ p_out = p_outpic->p[i_index].p_pixels;
+
+ p_vout->p_vlc->pf_memcpy( p_last_in, p_in, i_size );
+ break;
+ default:
+ break;
+ }
+ }
+ p_vout->p_sys->i_stack++;
+ if( p_vout->p_sys->i_stack >= p_vout->p_sys->i_history )
+ p_vout->p_sys->i_stack = 0;
+#undef pp_curent_area
+}
+
+/*****************************************************************************
+ * SendEvents: forward mouse and keyboard events to the parent p_vout
+ *****************************************************************************/
+static int SendEvents( vlc_object_t *p_this, char const *psz_var,
+ vlc_value_t oldval, vlc_value_t newval, void *p_data )
+{
+ var_Set( (vlc_object_t *)p_data, psz_var, newval );
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * SendEventsToChild: forward events to the child/children vout
+ *****************************************************************************/
+static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
+ vlc_value_t oldval, vlc_value_t newval, void *p_data )
+{
+ vout_thread_t *p_vout = (vout_thread_t *)p_this;
+ var_Set( p_vout->p_sys->p_vout, psz_var, newval );
+ return VLC_SUCCESS;
+}
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