mirror of
https://code.videolan.org/videolan/vlc
synced 2024-07-25 09:41:30 +02:00
427 lines
14 KiB
C
427 lines
14 KiB
C
/*****************************************************************************
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* magnify.c : Magnify/Zoom interactive effect
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*****************************************************************************
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* Copyright (C) 2005-2009 the VideoLAN team
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* $Id$
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*
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* Authors: Antoine Cellerier <dionoea -at- videolan -dot- 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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <math.h>
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#include <assert.h>
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#include <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_image.h>
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#include <vlc_filter.h>
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#include "filter_picture.h"
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/*****************************************************************************
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* Module descriptor
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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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vlc_module_begin ()
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set_description( N_("Magnify/Zoom interactive video filter") )
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set_shortname( N_( "Magnify" ))
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set_capability( "video filter2", 0 )
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set_category( CAT_VIDEO )
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set_subcategory( SUBCAT_VIDEO_VFILTER )
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set_callbacks( Create, Destroy )
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vlc_module_end ()
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static picture_t *Filter( filter_t *, picture_t * );
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static int Mouse( filter_t *, vlc_mouse_t *, const vlc_mouse_t *, const vlc_mouse_t * );
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/* */
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static void DrawZoomStatus( uint8_t *, int i_pitch, int i_width, int i_height,
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int i_offset_x, int i_offset_y, bool b_visible );
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static void DrawRectangle( uint8_t *, int i_pitch, int i_width, int i_height,
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int x, int y, int i_w, int i_h );
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/* */
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struct filter_sys_t
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{
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image_handler_t *p_image;
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int64_t i_hide_timeout;
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int i_zoom; /* zoom level in percent */
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int i_x, i_y; /* top left corner coordinates in original image */
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bool b_visible; /* is "interface" visible ? */
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int64_t i_last_activity;
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};
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#define VIS_ZOOM 4
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#define ZOOM_FACTOR 8
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/*****************************************************************************
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* Create:
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*****************************************************************************/
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static int Create( vlc_object_t *p_this )
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{
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filter_t *p_filter = (filter_t *)p_this;
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filter_sys_t *p_sys;
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/* */
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switch( p_filter->fmt_in.i_codec )
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{
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CASE_PLANAR_YUV
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case VLC_CODEC_GREY:
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break;
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default:
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msg_Err( p_filter, "Unsupported chroma" );
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return VLC_EGENERIC;
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}
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if( !es_format_IsSimilar( &p_filter->fmt_in, &p_filter->fmt_out ) )
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{
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msg_Err( p_filter, "Input and output format does not match" );
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return VLC_EGENERIC;
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}
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/* Allocate structure */
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p_filter->p_sys = p_sys = malloc( sizeof( *p_sys ) );
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if( !p_filter->p_sys )
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return VLC_ENOMEM;
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p_sys->p_image = image_HandlerCreate( p_filter );
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if( !p_sys->p_image )
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{
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free( p_sys );
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return VLC_EGENERIC;
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}
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p_sys->i_x = 0;
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p_sys->i_y = 0;
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p_sys->i_zoom = 2*ZOOM_FACTOR;
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p_sys->b_visible = true;
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p_sys->i_last_activity = mdate();
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p_sys->i_hide_timeout = 1000 * var_CreateGetInteger( p_filter, "mouse-hide-timeout" ); /* FIXME */
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/* */
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p_filter->pf_video_filter = Filter;
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p_filter->pf_video_mouse = Mouse;
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Destroy:
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*****************************************************************************/
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static void Destroy( vlc_object_t *p_this )
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{
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filter_t *p_filter = (filter_t *)p_this;
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filter_sys_t *p_sys = p_filter->p_sys;
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image_HandlerDelete( p_sys->p_image );
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free( 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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static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
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{
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filter_sys_t *p_sys = p_filter->p_sys;
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picture_t *p_outpic;
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int v_w, v_h;
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picture_t *p_converted;
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plane_t *p_oyp;
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int i_plane;
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p_outpic = filter_NewPicture( p_filter );
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if( !p_outpic )
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{
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picture_Release( p_pic );
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return NULL;
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}
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/* */
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const bool b_visible = p_sys->b_visible;
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const int o_x = p_sys->i_x;
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const int o_y = p_sys->i_y;
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const int o_zoom = p_sys->i_zoom;
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/* background magnified image */
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if( o_zoom != ZOOM_FACTOR )
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{
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video_format_t fmt_in;
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video_format_t fmt_out;
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picture_t crop;
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crop = *p_pic;
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for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
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{
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const int o_yp = o_y * p_outpic->p[i_plane].i_lines / p_outpic->p[Y_PLANE].i_lines;
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const int o_xp = o_x * p_outpic->p[i_plane].i_pitch / p_outpic->p[Y_PLANE].i_pitch;
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crop.p[i_plane].p_pixels += o_yp * p_pic->p[i_plane].i_pitch + o_xp;
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}
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/* */
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fmt_in = p_filter->fmt_in.video;
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fmt_in.i_width = (fmt_in.i_width * ZOOM_FACTOR / o_zoom) & ~1;
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fmt_in.i_height = (fmt_in.i_height * ZOOM_FACTOR / o_zoom) & ~1;
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/* */
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fmt_out = p_filter->fmt_out.video;
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p_converted = image_Convert( p_sys->p_image, &crop, &fmt_in, &fmt_out );
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picture_CopyPixels( p_outpic, p_converted );
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picture_Release( p_converted );
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}
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else
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{
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picture_CopyPixels( p_outpic, p_pic );
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}
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/* */
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p_oyp = &p_outpic->p[Y_PLANE];
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if( b_visible )
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{
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video_format_t fmt_out;
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/* image visualization */
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fmt_out = p_filter->fmt_out.video;
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fmt_out.i_width = (fmt_out.i_width /VIS_ZOOM) & ~1;
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fmt_out.i_height = (fmt_out.i_height/VIS_ZOOM) & ~1;
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p_converted = image_Convert( p_sys->p_image, p_pic,
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&p_pic->format, &fmt_out );
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/* It will put only what can be copied at the top left */
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picture_CopyPixels( p_outpic, p_converted );
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picture_Release( p_converted );
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/* white rectangle on visualization */
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v_w = __MIN( fmt_out.i_width * ZOOM_FACTOR / o_zoom, fmt_out.i_width - 1 );
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v_h = __MIN( fmt_out.i_height * ZOOM_FACTOR / o_zoom, fmt_out.i_height - 1 );
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DrawRectangle( p_oyp->p_pixels, p_oyp->i_pitch,
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p_oyp->i_pitch, p_oyp->i_lines,
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o_x/VIS_ZOOM, o_y/VIS_ZOOM,
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v_w, v_h );
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/* */
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v_h = fmt_out.i_height + 1;
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}
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else
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{
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v_h = 1;
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}
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/* print a small "VLC ZOOM" */
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if( b_visible || p_sys->i_last_activity + p_sys->i_hide_timeout > mdate() )
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DrawZoomStatus( p_oyp->p_pixels, p_oyp->i_pitch, p_oyp->i_pitch, p_oyp->i_lines,
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1, v_h, b_visible );
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if( b_visible )
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{
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/* zoom gauge */
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memset( p_oyp->p_pixels + (v_h+9)*p_oyp->i_pitch, 0xff, 41 );
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for( int y = v_h + 10; y < v_h + 90; y++ )
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{
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int i_width = v_h + 90 - y;
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i_width = i_width * i_width / 160;
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if( (80 - y + v_h)*ZOOM_FACTOR/10 < o_zoom )
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{
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memset( p_oyp->p_pixels + y*p_oyp->i_pitch, 0xff, i_width );
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}
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else
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{
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p_oyp->p_pixels[y*p_oyp->i_pitch] = 0xff;
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p_oyp->p_pixels[y*p_oyp->i_pitch + i_width - 1] = 0xff;
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}
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}
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}
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return CopyInfoAndRelease( p_outpic, p_pic );
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}
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static void DrawZoomStatus( uint8_t *pb_dst, int i_pitch, int i_width, int i_height,
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int i_offset_x, int i_offset_y, bool b_visible )
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{
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static const char *p_hide =
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"X X X XXXX XXXXX XXX XXX XX XX X X XXXXX XXXX XXXXXL"
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"X X X X X X X X X X X X X X X X X X L"
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" X X X X X X X X X X X XXXXX X X X XXXX L"
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" X X X X X X X X X X X X X X X X X L"
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" X XXXXX XXXX XXXXX XXX XXX X X X X XXXXX XXXX XXXXXL";
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static const char *p_show =
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"X X X XXXX XXXXX XXX XXX XX XX XXXX X X XXX X XL"
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"X X X X X X X X X X X X X X X X X X XL"
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" X X X X X X X X X X X XXX XXXXX X X X X XL"
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" X X X X X X X X X X X X X X X X X X XL"
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" X XXXXX XXXX XXXXX XXX XXX X X XXXX X X XXX X X L";
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const char *p_draw = b_visible ? p_hide : p_show;
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int i, y, x;
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for( i = 0, x = i_offset_x, y = i_offset_y; p_draw[i] != '\0'; i++ )
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{
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if( p_draw[i] == 'X' )
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{
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if( x < i_width && y < i_height )
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pb_dst[y*i_pitch + x] = 0xff;
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x++;
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}
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else if( p_draw[i] == ' ' )
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{
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x++;
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}
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else if( p_draw[i] == 'L' )
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{
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x = i_offset_x;
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y++;
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}
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}
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}
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static void DrawRectangle( uint8_t *pb_dst, int i_pitch, int i_width, int i_height,
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int x, int y, int i_w, int i_h )
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{
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int dy;
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if( x + i_w > i_width || y + i_h > i_height )
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return;
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/* top line */
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vlc_memset( &pb_dst[y * i_pitch + x], 0xff, i_w );
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/* left and right */
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for( dy = 1; dy < i_h-1; dy++ )
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{
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pb_dst[(y+dy) * i_pitch + x + 0] = 0xff;
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pb_dst[(y+dy) * i_pitch + x + i_w-1] = 0xff;
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}
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/* bottom line */
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vlc_memset( &pb_dst[(y+i_h-1) * i_pitch + x], 0xff, i_w );
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}
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static int Mouse( filter_t *p_filter, vlc_mouse_t *p_mouse, const vlc_mouse_t *p_old, const vlc_mouse_t *p_new )
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{
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filter_sys_t *p_sys = p_filter->p_sys;
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const video_format_t *p_fmt = &p_filter->fmt_in.video;
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/* */
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const bool b_click = vlc_mouse_HasPressed( p_old, p_new, MOUSE_BUTTON_LEFT );
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const bool b_pressed = vlc_mouse_IsLeftPressed( p_new );
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bool b_grab = false;
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/* Find the mouse position */
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if( p_sys->b_visible )
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{
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const int i_visu_width = p_fmt->i_width / VIS_ZOOM;
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const int i_visu_height = p_fmt->i_height / VIS_ZOOM;
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if( p_new->i_x >= 0 && p_new->i_x < i_visu_width &&
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p_new->i_y >= 0 && p_new->i_y < i_visu_height )
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{
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/* Visualization */
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if( b_pressed )
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{
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const int v_w = p_fmt->i_width * ZOOM_FACTOR / p_sys->i_zoom;
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const int v_h = p_fmt->i_height * ZOOM_FACTOR / p_sys->i_zoom;
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p_sys->i_x = VLC_CLIP( p_new->i_x * VIS_ZOOM - v_w/2, 0,
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(int)p_fmt->i_width - v_w - 1);
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p_sys->i_y = VLC_CLIP( p_new->i_y * VIS_ZOOM - v_h/2, 0,
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(int)p_fmt->i_height - v_h - 1);
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b_grab = true;
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}
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}
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else if( p_new->i_x >= 0 && p_new->i_x < 80 &&
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p_new->i_y >= i_visu_height &&
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p_new->i_y < i_visu_height + 9 )
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{
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/* Hide text */
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if( b_click )
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{
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p_sys->b_visible = false;
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b_grab = true;
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}
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}
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else if( p_new->i_x >= 0 &&
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p_new->i_x <= ( i_visu_height + 90 - p_new->i_y ) *
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( i_visu_height + 90 - p_new->i_y ) / 160 &&
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p_new->i_y >= i_visu_height + 9 &&
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p_new->i_y <= i_visu_height + 90 )
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{
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/* Zoom gauge */
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if( b_pressed )
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{
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p_sys->i_zoom = __MAX( ZOOM_FACTOR,
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(80 + i_visu_height - p_new->i_y + 2) *
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ZOOM_FACTOR / 10 );
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const int v_w = p_fmt->i_width * ZOOM_FACTOR / p_sys->i_zoom;
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const int v_h = p_fmt->i_height * ZOOM_FACTOR / p_sys->i_zoom;
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p_sys->i_x = VLC_CLIP( p_sys->i_x, 0, (int)p_fmt->i_width - v_w - 1 );
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p_sys->i_y = VLC_CLIP( p_sys->i_y, 0, (int)p_fmt->i_height - v_h - 1 );
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b_grab = true;
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}
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}
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}
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else
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{
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if( p_new->i_x >= 0 && p_new->i_x < 80 &&
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p_new->i_y >= 0 && p_new->i_y <= 10 )
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{
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/* Show text */
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if( b_click )
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{
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p_sys->b_visible = true;
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b_grab = true;
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}
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}
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}
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if( vlc_mouse_HasMoved( p_old, p_new ) )
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p_sys->i_last_activity = mdate();
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if( b_grab )
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return VLC_EGENERIC;
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/* */
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*p_mouse = *p_new;
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p_mouse->i_x = p_sys->i_x + p_new->i_x * ZOOM_FACTOR / p_sys->i_zoom;
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p_mouse->i_y = p_sys->i_y + p_new->i_y * ZOOM_FACTOR / p_sys->i_zoom;
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return VLC_SUCCESS;
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}
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