--- /dev/null
+/*****************************************************************************
+ * mirror.c : Mirror video plugin for vlc
+ *****************************************************************************
+ * Copyright (C) 2009 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Branko Kokanovic <branko.kokanovic@gmail.com>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+
+#include <assert.h>
+#include <vlc_filter.h>
+#include "filter_picture.h"
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Create ( vlc_object_t * );
+static void Destroy ( vlc_object_t * );
+
+static picture_t *Filter( filter_t *, picture_t * );
+static void VerticalMirror( picture_t *, picture_t *, int plane, bool );
+static void HorizontalMirror( picture_t *, picture_t *, int, bool );
+static void PlanarVerticalMirror( picture_t *, picture_t *, int plane, bool );
+static void YUV422VerticalMirror( picture_t *, picture_t *, int plane, bool, bool );
+static void RV24VerticalMirror( picture_t *, picture_t *, int plane, bool );
+static void RV32VerticalMirror( picture_t *, picture_t *, int plane, bool );
+
+static void YUV422Mirror2Pixels( uint8_t *, uint8_t *, bool );
+
+static const char *const ppsz_filter_options[] = {
+ "split", "direction", NULL
+};
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+#define ORIENTATION_TEXT N_("Mirror orientation")
+#define ORIENTATION_LONGTEXT N_("Defines orientation of the mirror splitting. \
+ Can be vertical or horizontal" )
+static const int pi_orientation_values[] = { 0, 1 };
+static const char *const ppsz_orientation_descriptions[] = {
+ N_("Vertical"), N_("Horizontal") };
+
+#define DIRECTION_TEXT N_("Direction")
+#define DIRECTION_LONGTEXT N_("Direction of the mirroring" )
+static const int pi_direction_values[] = { 0, 1 };
+static const char *const ppsz_direction_descriptions[] = {
+ N_("Left to right/Top to bottom"), N_("Right to left/Bottom to top") };
+
+#define CFG_PREFIX "mirror-"
+
+vlc_module_begin ()
+ set_description( N_("Mirror video filter") )
+ set_shortname( N_("Mirror video" ))
+ set_help( N_("Splits video in two same parts, like in the mirror") )
+ set_category( CAT_VIDEO )
+ set_subcategory( SUBCAT_VIDEO_VFILTER )
+ set_capability( "video filter2", 0 )
+ add_integer( CFG_PREFIX "split", 0, NULL, ORIENTATION_TEXT,
+ ORIENTATION_LONGTEXT, false )
+ change_integer_list( pi_orientation_values,
+ ppsz_orientation_descriptions, NULL )
+ add_integer( CFG_PREFIX "direction", 0, NULL, DIRECTION_TEXT,
+ DIRECTION_LONGTEXT, false )
+ change_integer_list( pi_direction_values, ppsz_direction_descriptions,
+ NULL )
+ set_callbacks( Create, Destroy )
+vlc_module_end ()
+
+/*****************************************************************************
+ * callback prototypes
+ *****************************************************************************/
+static int FilterCallback( vlc_object_t *, char const *,
+ vlc_value_t, vlc_value_t, void * );
+
+/*****************************************************************************
+ * filter_sys_t: adjust filter method descriptor
+ *****************************************************************************/
+struct filter_sys_t
+{
+ int i_split;
+ int i_direction;
+ vlc_mutex_t lock;
+};
+
+/*****************************************************************************
+ * Create: allocates Mirror video thread output method
+ *****************************************************************************
+ * This function allocates and initializes a Mirror vout method.
+ *****************************************************************************/
+static int Create( vlc_object_t *p_this )
+{
+ filter_t *p_filter = (filter_t *)p_this;
+ filter_sys_t *p_sys;
+
+ switch( p_filter->fmt_in.video.i_chroma )
+ {
+ CASE_PLANAR_YUV_SQUARE
+ break;
+ CASE_PACKED_YUV_422
+ break;
+ case VLC_CODEC_RGB24:
+ case VLC_CODEC_RGB32:
+ break;
+
+ default:
+ msg_Err( p_filter, "Unsupported input chroma (%4.4s)",
+ (char*)&(p_filter->fmt_in.video.i_chroma) );
+ return VLC_EGENERIC;
+ }
+
+ if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
+ {
+ msg_Err( p_filter, "Input and output chromas don't match" );
+ return VLC_EGENERIC;
+ }
+
+ /* Allocate structure */
+ p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
+ if( p_filter->p_sys == NULL )
+ return VLC_ENOMEM;
+
+ config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
+ p_filter->p_cfg );
+ p_sys->i_split = var_CreateGetIntegerCommand( p_filter, CFG_PREFIX "split" );
+ p_sys->i_direction = var_CreateGetIntegerCommand( p_filter,
+ CFG_PREFIX "direction" );
+
+ vlc_mutex_init( &p_sys->lock );
+
+ var_AddCallback( p_filter, CFG_PREFIX "split", FilterCallback, NULL );
+ var_AddCallback( p_filter, CFG_PREFIX "direction", FilterCallback, NULL );
+
+ p_filter->pf_video_filter = Filter;
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Destroy: destroy Mirror video thread output method
+ *****************************************************************************
+ * Terminate an output method created by MirrorCreateOutputMethod
+ *****************************************************************************/
+static void Destroy( vlc_object_t *p_this )
+{
+ filter_t *p_filter = (filter_t *)p_this;
+
+ var_DelCallback( p_filter, CFG_PREFIX "split", FilterCallback, NULL );
+ var_DelCallback( p_filter, CFG_PREFIX "direction", FilterCallback, NULL );
+
+ vlc_mutex_destroy( &p_filter->p_sys->lock );
+ free( p_filter->p_sys );
+}
+
+/*****************************************************************************
+ * Render: displays previously rendered output
+ *****************************************************************************
+ * This function send the currently rendered image to Mirror image, waits
+ * until it is displayed and switch the two rendering buffers, preparing next
+ * frame.
+ *****************************************************************************/
+static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
+{
+ picture_t *p_outpic;
+ bool b_vertical_split, b_left_to_right;
+ int i_index;
+
+ if( !p_pic ) return NULL;
+
+ filter_sys_t *p_sys = p_filter->p_sys;
+ vlc_mutex_lock( &p_sys->lock );
+ b_vertical_split = p_sys->i_split == 0 ? true : false;
+ b_left_to_right = p_sys->i_direction == 0 ? true : false;
+ vlc_mutex_unlock( &p_sys->lock );
+
+ p_outpic = filter_NewPicture( p_filter );
+ if( !p_outpic )
+ {
+ msg_Warn( p_filter, "can't get output picture" );
+ picture_Release( p_pic );
+ return NULL;
+ }
+
+ for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
+ {
+ if ( b_vertical_split )
+ VerticalMirror( p_pic, p_outpic, i_index, b_left_to_right );
+ else
+ HorizontalMirror( p_pic, p_outpic, i_index, b_left_to_right );
+ }
+
+ return CopyInfoAndRelease( p_outpic, p_pic );
+}
+
+/*****************************************************************************
+ * VerticalMirror: Mirrors vertically image
+ *****************************************************************************
+ * This function is a simple delegate to concrete function for vertical
+ * mirroring depending on the input format.
+ *****************************************************************************/
+static void VerticalMirror( picture_t *p_pic, picture_t *p_outpic, int i_plane,
+ bool b_left_to_right )
+{
+ switch( p_pic->format.i_chroma )
+ {
+ CASE_PLANAR_YUV_SQUARE
+ PlanarVerticalMirror( p_pic, p_outpic, i_plane, b_left_to_right );
+ break;
+ case VLC_CODEC_YUYV:
+ case VLC_CODEC_YVYU:
+ YUV422VerticalMirror( p_pic, p_outpic, i_plane, b_left_to_right,
+ true );
+ break;
+ case VLC_CODEC_UYVY:
+ case VLC_CODEC_CYUV:
+ YUV422VerticalMirror( p_pic, p_outpic, i_plane, b_left_to_right,
+ false );
+ break;
+ case VLC_CODEC_RGB24:
+ RV24VerticalMirror( p_pic, p_outpic, i_plane, b_left_to_right );
+ break;
+ case VLC_CODEC_RGB32:
+ RV32VerticalMirror( p_pic, p_outpic, i_plane, b_left_to_right );
+ break;
+ default:
+ assert( false );
+ }
+}
+
+/*****************************************************************************
+ * PlanarVerticalMirror: Mirrors vertically image byte by byte
+ *****************************************************************************
+ * This function mirrors image vertically. It iterates for all lines in
+ * image and for every line, it mirrors byte for byte if needed.
+ * This function works for planar formats only.
+ *****************************************************************************/
+static void PlanarVerticalMirror( picture_t *p_pic, picture_t *p_outpic,
+ int i_plane, bool b_left_to_right )
+{
+ uint8_t *p_in, *p_in_end, *p_line_start, *p_line_end, *p_out;
+
+ p_in = p_pic->p[i_plane].p_pixels;
+ p_in_end = p_in + p_pic->p[i_plane].i_visible_lines
+ * p_pic->p[i_plane].i_pitch;
+ p_out = p_outpic->p[i_plane].p_pixels;
+
+ while( p_in < p_in_end ) {
+ p_line_start = p_in;
+ p_line_end = p_in + p_pic->p[i_plane].i_visible_pitch;
+ while( p_in < p_line_end )
+ {
+ /* are we in the left part of the line */
+ if ( p_in < p_line_start + ( p_line_end - p_line_start ) / 2 )
+ {
+ if ( b_left_to_right )
+ *p_out = *p_in;
+ else
+ *p_out = *( p_line_end - ( p_in - p_line_start ) );
+ }
+ else
+ {
+ if ( b_left_to_right )
+ *p_out = *( p_line_start + ( p_line_end - p_in ) );
+ else
+ *p_out = *p_in;
+ }
+ p_in++;
+ p_out++;
+ }
+ p_in += p_pic->p[i_plane].i_pitch - p_pic->p[i_plane].i_visible_pitch;
+ p_out += p_outpic->p[i_plane].i_pitch
+ - p_outpic->p[i_plane].i_visible_pitch;
+ }
+}
+
+/*****************************************************************************
+ * YUV422VerticalMirror: Mirrors vertically image byte by byte for YUV422 format
+ *****************************************************************************
+ * This function mirrors image vertically. It iterates for all lines in
+ * image and for every line, it iterates for 4-byte chucks, properly mirroring
+ * them vertically (swapping Y components and keeping Cb and Cr components).
+ * This function works only for YUV422 packed formats.
+ *****************************************************************************/
+static void YUV422VerticalMirror( picture_t *p_pic, picture_t *p_outpic,
+ int i_plane, bool b_left_to_right,
+ bool b_y_is_odd )
+{
+ uint8_t *p_in, *p_in_end, *p_line_start, *p_line_end, *p_out;
+
+ p_in = p_pic->p[i_plane].p_pixels;
+ p_in_end = p_in + p_pic->p[i_plane].i_visible_lines
+ * p_pic->p[i_plane].i_pitch;
+ p_out = p_outpic->p[i_plane].p_pixels;
+
+ while( p_in < p_in_end )
+ {
+ p_line_start = p_in;
+ p_line_end = p_in + p_pic->p[i_plane].i_visible_pitch;
+ while( p_in < p_line_end )
+ {
+ /* are we in the left part of the line */
+ if ( p_in < p_line_start + ( p_line_end - p_line_start ) / 2 )
+ {
+ if ( b_left_to_right )
+ {
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ }
+ else
+ {
+ uint8_t *p_start = p_line_end - ( p_in - p_line_start );
+ YUV422Mirror2Pixels( p_out, p_start, b_y_is_odd );
+ p_in += 4;
+ p_out += 4;
+ }
+ }
+ else
+ {
+ if ( b_left_to_right )
+ {
+ uint8_t *p_start = p_line_end - ( p_in - p_line_start );
+ YUV422Mirror2Pixels( p_out, p_start, b_y_is_odd );
+ p_in += 4;
+ p_out += 4;
+ }
+ else
+ {
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ }
+ }
+ }
+ p_in += p_pic->p[i_plane].i_pitch - p_pic->p[i_plane].i_visible_pitch;
+ p_out += p_outpic->p[i_plane].i_pitch
+ - p_outpic->p[i_plane].i_visible_pitch;
+ }
+}
+
+/*****************************************************************************
+ * YUV422Mirror2Pixels: Mirrors 2 consecutive pixels
+ *****************************************************************************
+ * This function mirrors two consecutive pixels of 4 byte size. Depending of
+ * position of Y components (b_y_is_odd is true if Y components are first and
+ * third (like in YUYV or YVYU), they are properly swapped, and Cb and Cr
+ * component positions are preserved.
+ *****************************************************************************/
+static void YUV422Mirror2Pixels( uint8_t* p_dst, uint8_t *p_src,
+ bool b_y_is_odd )
+{
+ if ( b_y_is_odd )
+ {
+ /* swap Y components */
+ *p_dst = *( p_src + 2 );
+ *( p_dst + 2 ) = *p_src;
+ /* copy Cb and Cr components */
+ *( p_dst + 1 ) = *( p_src + 1 );
+ *( p_dst + 3 ) = *( p_src + 3 );
+ }
+ else{
+ /* swap Y components */
+ *( p_dst + 1 )= *( p_src + 3 );
+ *( p_dst + 3 ) = *( p_src + 1);
+ /* copy Cb and Cr components */
+ *p_dst = *( p_src + 2 );
+ *( p_dst + 2 ) = *p_src;
+ }
+}
+
+/*****************************************************************************
+ * RV24VerticalMirror: Mirrors vertically image byte by byte for RV24 format
+ *****************************************************************************
+ * This function mirrors image vertically. It iterates for all lines in
+ * image and for every line, it iterates for 3-byte chunks.
+ * This function works only for RV24 formats.
+ *****************************************************************************/
+static void RV24VerticalMirror( picture_t *p_pic, picture_t *p_outpic,
+ int i_plane, bool b_left_to_right )
+{
+ uint8_t *p_in, *p_in_end, *p_line_start, *p_line_end, *p_out;
+
+ p_in = p_pic->p[i_plane].p_pixels;
+ p_in_end = p_in + p_pic->p[i_plane].i_visible_lines
+ * p_pic->p[i_plane].i_pitch;
+ p_out = p_outpic->p[i_plane].p_pixels;
+
+ while( p_in < p_in_end )
+ {
+ p_line_start = p_in;
+ p_line_end = p_in + p_pic->p[i_plane].i_visible_pitch;
+ while( p_in < p_line_end )
+ {
+ /* are we in the left part of the line */
+ if ( p_in < p_line_start + ( p_line_end - p_line_start ) / 2 )
+ {
+ if ( b_left_to_right )
+ {
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ }
+ else
+ {
+ uint8_t *p_pixel = p_line_end - ( p_in - p_line_start );
+ p_in += 3;
+ *p_out++ = *p_pixel++;
+ *p_out++ = *p_pixel++;
+ *p_out++ = *p_pixel++;
+ }
+ }
+ else
+ {
+ if ( b_left_to_right )
+ {
+ uint8_t *p_pixel = p_line_end - ( p_in - p_line_start );
+ p_in += 3;
+ *p_out++ = *p_pixel++;
+ *p_out++ = *p_pixel++;
+ *p_out++ = *p_pixel++;
+ }
+ else
+ {
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ *p_out++ = *p_in++;
+ }
+ }
+ }
+ p_in += p_pic->p[i_plane].i_pitch - p_pic->p[i_plane].i_visible_pitch;
+ p_out += p_outpic->p[i_plane].i_pitch
+ - p_outpic->p[i_plane].i_visible_pitch;
+ }
+}
+
+/*****************************************************************************
+ * RV32VerticalMirror: Mirrors vertically image byte by byte for RV32 format
+ *****************************************************************************
+ * This function mirrors image vertically. It iterates for all lines in
+ * image and for every line, it iterates for 4-byte chunks as 32-bit pointers.
+ * This function works only for RV32 formats.
+ *****************************************************************************/
+static void RV32VerticalMirror( picture_t *p_pic, picture_t *p_outpic,
+ int i_plane, bool b_left_to_right )
+{
+ uint8_t *p_in, *p_in_end, *p_out;
+
+ p_in = p_pic->p[i_plane].p_pixels;
+ p_in_end = p_in + p_pic->p[i_plane].i_visible_lines
+ * p_pic->p[i_plane].i_pitch;
+ p_out = p_outpic->p[i_plane].p_pixels;
+
+ while( p_in < p_in_end )
+ {
+ uint32_t *p_in32, *p_out32, *p_line_start32, *p_line_end32;
+ p_in32 = (uint32_t*) p_in;
+ p_out32 = (uint32_t*) p_out;
+ p_line_start32 = p_in32;
+ p_line_end32 = (uint32_t*) ( p_in + p_pic->p[i_plane].i_visible_pitch) ;
+
+ while( p_in32 < p_line_end32 )
+ {
+ /* are we in the left part of the line */
+ if ( p_in32 < p_line_start32 + ( p_line_end32 - p_line_start32 ) / 2 )
+ {
+ if ( b_left_to_right )
+ {
+ *p_out32++ = *p_in32++;
+ }
+ else
+ {
+ uint32_t *p_pixel32 = p_line_end32 - ( p_in32 - p_line_start32 );
+ p_in32++;
+ *p_out++ = *p_pixel32;
+ }
+ }
+ else
+ {
+ if ( b_left_to_right )
+ {
+ uint32_t *p_pixel32 = p_line_end32 - ( p_in32 - p_line_start32 );
+ p_in32++;
+ *p_out++ = *p_pixel32;
+ }
+ else
+ {
+ *p_out32++ = *p_in32++;
+ }
+ }
+ }
+ p_in = (uint8_t*) p_in32;
+ p_out = (uint8_t*) p_out32;
+ p_in += p_pic->p[i_plane].i_pitch - p_pic->p[i_plane].i_visible_pitch;
+ p_out += p_outpic->p[i_plane].i_pitch
+ - p_outpic->p[i_plane].i_visible_pitch;
+ }
+}
+
+/*****************************************************************************
+ * HorizontalMirror: Mirrors horizontally image byte by byte
+ *****************************************************************************
+ * This function mirrors image horizontally. It iterates for all lines in
+ * image and for every line, determines if it should be copied, and if it does,
+ * finds opposite line in picture and copies current byte from opposite line.
+ * This function works both for planar, packed and RV24 formats.
+ *****************************************************************************/
+static void HorizontalMirror( picture_t *p_pic, picture_t *p_outpic, int i_plane,
+ bool b_top_to_bottom )
+{
+ uint8_t *p_in, *p_in_end, *p_line_start, *p_line_end, *p_out;
+
+ int i_curr_line = 0;
+ int i_max_lines = p_pic->p[i_plane].i_visible_lines;
+
+ p_in = p_pic->p[i_plane].p_pixels;
+ p_in_end = p_in + p_pic->p[i_plane].i_visible_lines
+ * p_pic->p[i_plane].i_pitch;
+ p_out = p_outpic->p[i_plane].p_pixels;
+
+ while( p_in < p_in_end )
+ {
+ p_line_start = p_in;
+ p_line_end = p_in + p_pic->p[i_plane].i_visible_pitch;
+ while( p_in < p_line_end )
+ {
+ uint8_t *p_inverse_line;
+ /* are we in the upper part of the picture */
+ if ( i_curr_line < i_max_lines/2 )
+ {
+ if ( b_top_to_bottom )
+ {
+ *p_out = *p_in;
+ }
+ else
+ {
+ /* determines line inverse to current line */
+ p_inverse_line = p_pic->p[i_plane].p_pixels +
+ ( i_max_lines - i_curr_line - 1 ) * p_pic->p[i_plane].i_pitch;
+ *p_out = *( p_inverse_line + ( p_in - p_line_start ) );
+ }
+ }
+ else
+ {
+ if ( b_top_to_bottom )
+ {
+ /* determines line inverse to current line */
+ p_inverse_line = p_pic->p[i_plane].p_pixels +
+ ( i_max_lines - i_curr_line - 1 ) * p_pic->p[i_plane].i_pitch;
+ *p_out = *( p_inverse_line + ( p_in - p_line_start ) );
+ }
+ else
+ {
+ *p_out = *p_in;
+ }
+ }
+ p_in++;
+ p_out++;
+ }
+ i_curr_line++;
+ p_in += p_pic->p[i_plane].i_pitch - p_pic->p[i_plane].i_visible_pitch;
+ p_out += p_outpic->p[i_plane].i_pitch
+ - p_outpic->p[i_plane].i_visible_pitch;
+ }
+}
+
+static int FilterCallback ( vlc_object_t *p_this, char const *psz_var,
+ vlc_value_t oldval, vlc_value_t newval, void *p_data )
+{
+ (void)oldval; (void)p_data;
+ filter_t *p_filter = (filter_t*)p_this;
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ if( !strcmp( psz_var, CFG_PREFIX "split" ) )
+ {
+ vlc_mutex_lock( &p_sys->lock );
+ p_sys->i_split = newval.i_int;
+ vlc_mutex_unlock( &p_sys->lock );
+ }
+ else /* CFG_PREFIX "direction" */
+ {
+ vlc_mutex_lock( &p_sys->lock );
+ p_sys->i_direction = newval.i_int;
+ vlc_mutex_unlock( &p_sys->lock );
+ }
+
+ return VLC_SUCCESS;
+}
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