mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
253 lines
9.1 KiB
C
253 lines
9.1 KiB
C
/*****************************************************************************
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* Psychedelic.c : Psychedelic video effect plugin for vlc
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*****************************************************************************
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* Copyright (C) 2000-2006 the VideoLAN team
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* $Id$
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*
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* Authors: Samuel Hocevar <sam@zoy.org>
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* 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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#include <stdlib.h> /* malloc(), free() */
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#include <string.h>
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#include <math.h> /* sin(), cos() */
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#include <vlc/vlc.h>
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#include <vlc/decoder.h>
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#include "vlc_filter.h"
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#include "vlc_image.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 picture_t *Filter( filter_t *, picture_t * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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vlc_module_begin();
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set_description( _("Psychedelic video filter") );
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set_shortname( N_( "Psychedelic" ));
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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_VFILTER2 );
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add_shortcut( "psychedelic" );
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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: Distort 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 Distort specific properties of an output thread.
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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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unsigned int x, y, scale;
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int xinc, yinc, scaleinc;
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uint8_t u,v;
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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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filter_t *p_filter = (filter_t *)p_this;
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/* Allocate structure */
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p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
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if( p_filter->p_sys == NULL )
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{
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msg_Err( p_filter, "out of memory" );
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return VLC_ENOMEM;
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}
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p_filter->pf_video_filter = Filter;
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p_filter->p_sys->x = 10;
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p_filter->p_sys->y = 10;
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p_filter->p_sys->scale = 1;
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p_filter->p_sys->xinc = 1;
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p_filter->p_sys->yinc = 1;
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p_filter->p_sys->scaleinc = 1;
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p_filter->p_sys->u = 0;
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p_filter->p_sys->v = 0;
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p_filter->p_sys->p_image = NULL;
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Destroy: destroy Distort 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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filter_t *p_filter = (filter_t *)p_this;
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if( p_filter->p_sys->p_image )
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image_HandlerDelete( p_filter->p_sys->p_image );
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free( p_filter->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 picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
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{
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picture_t *p_outpic;
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unsigned int w, h;
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int x,y;
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uint8_t u,v;
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video_format_t fmt_out = {0};
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picture_t *p_converted;
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if( !p_pic ) return NULL;
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p_outpic = p_filter->pf_vout_buffer_new( p_filter );
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if( !p_outpic )
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{
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msg_Warn( p_filter, "can't get output picture" );
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if( p_pic->pf_release )
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p_pic->pf_release( p_pic );
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return NULL;
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}
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if( !p_filter->p_sys->p_image )
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p_filter->p_sys->p_image = image_HandlerCreate( p_filter );
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/* chrominance */
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u = p_filter->p_sys->u;
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v = p_filter->p_sys->v;
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for( y = 0; y<p_outpic->p[U_PLANE].i_lines; y++)
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{
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memset( p_outpic->p[U_PLANE].p_pixels+y*p_outpic->p[U_PLANE].i_pitch,
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u, p_outpic->p[U_PLANE].i_pitch );
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memset( p_outpic->p[V_PLANE].p_pixels+y*p_outpic->p[V_PLANE].i_pitch,
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v, p_outpic->p[V_PLANE].i_pitch );
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if( v == 0 && u != 0 )
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u --;
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else if( u == 0xff )
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v --;
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else if( v == 0xff )
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u ++;
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else if( u == 0 )
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v ++;
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}
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/* luminance */
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p_filter->p_vlc->pf_memcpy(
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p_outpic->p[Y_PLANE].p_pixels, p_pic->p[Y_PLANE].p_pixels,
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p_outpic->p[Y_PLANE].i_lines * p_outpic->p[Y_PLANE].i_pitch );
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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 = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
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fmt_out.i_height = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
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p_converted = image_Convert( p_filter->p_sys->p_image, p_pic,
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&(p_pic->format), &fmt_out );
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#define copyimage( plane, b ) \
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for( y=0; y<p_converted->p[plane].i_visible_lines; y++) { \
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for( x=0; x<p_converted->p[plane].i_visible_pitch; x++) { \
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int nx, ny; \
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if( p_filter->p_sys->yinc == 1 ) \
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ny= y; \
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else \
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ny = p_converted->p[plane].i_visible_lines-y; \
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if( p_filter->p_sys->xinc == 1 ) \
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nx = x; \
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else \
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nx = p_converted->p[plane].i_visible_pitch-x; \
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p_outpic->p[plane].p_pixels[(p_filter->p_sys->x*b+nx)+(ny+p_filter->p_sys->y*b)*p_outpic->p[plane].i_pitch ] = p_converted->p[plane].p_pixels[y*p_converted->p[plane].i_pitch+x]; \
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} }
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copyimage( Y_PLANE, 2 );
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copyimage( U_PLANE, 1 );
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copyimage( V_PLANE, 1 );
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#undef copyimage
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p_converted->pf_release( p_converted );
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p_filter->p_sys->x += p_filter->p_sys->xinc;
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p_filter->p_sys->y += p_filter->p_sys->yinc;
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p_filter->p_sys->scale += p_filter->p_sys->scaleinc;
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if( p_filter->p_sys->scale >= 50 ) p_filter->p_sys->scaleinc = -1;
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if( p_filter->p_sys->scale <= 1 ) p_filter->p_sys->scaleinc = 1;
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w = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
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h = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
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if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
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p_filter->p_sys->xinc = -1;
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if( p_filter->p_sys->x <= 0 )
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p_filter->p_sys->xinc = 1;
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if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
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p_filter->p_sys->x = (p_filter->fmt_out.video.i_width-w)/2;
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if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
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p_filter->p_sys->y = (p_filter->fmt_out.video.i_height-h)/2;
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if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
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p_filter->p_sys->yinc = -1;
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if( p_filter->p_sys->y <= 0 )
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p_filter->p_sys->yinc = 1;
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for( y = 0; y< 16; y++ )
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{
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if( p_filter->p_sys->v == 0 && p_filter->p_sys->u != 0 )
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p_filter->p_sys->u -= 1;
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else if( p_filter->p_sys->u == 0xff )
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p_filter->p_sys->v -= 1;
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else if( p_filter->p_sys->v == 0xff )
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p_filter->p_sys->u += 1;
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else if( p_filter->p_sys->u == 0 )
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p_filter->p_sys->v += 1;
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}
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p_outpic->date = p_pic->date;
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p_outpic->b_force = p_pic->b_force;
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p_outpic->i_nb_fields = p_pic->i_nb_fields;
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p_outpic->b_progressive = p_pic->b_progressive;
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p_outpic->b_top_field_first = p_pic->b_top_field_first;
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p_pic->pf_release( p_pic );
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return p_outpic;
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}
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