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vlc/modules/video_chroma/yuy2_i420.c
Steve Lhomme 5363279805 remove the $Id$ in the source code
2019-01-17 12:21:18 +01:00

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/*****************************************************************************
* yuy2_i420.c : Packed YUV 4:2:2 to Planar YUV conversion module for vlc
*****************************************************************************
* Copyright (C) 2007 VLC authors and VideoLAN
*
* Authors: Antoine Cellerier <dionoea at videolan dot org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 <vlc_filter.h>
#include <vlc_picture.h>
#define SRC_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422"
#define DEST_FOURCC "I420"
/*****************************************************************************
* Local and extern prototypes.
*****************************************************************************/
static int Activate ( vlc_object_t * );
static void YUY2_I420 ( filter_t *, picture_t *, picture_t * );
static void YVYU_I420 ( filter_t *, picture_t *, picture_t * );
static void UYVY_I420 ( filter_t *, picture_t *, picture_t * );
static picture_t *YUY2_I420_Filter ( filter_t *, picture_t * );
static picture_t *YVYU_I420_Filter ( filter_t *, picture_t * );
static picture_t *UYVY_I420_Filter ( filter_t *, picture_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin ()
set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
set_capability( "video converter", 80 )
set_callbacks( Activate, NULL )
vlc_module_end ()
/*****************************************************************************
* Activate: allocate a chroma function
*****************************************************************************
* This function allocates and initializes a chroma function
*****************************************************************************/
static int Activate( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
if( p_filter->fmt_in.video.i_width & 1
|| p_filter->fmt_in.video.i_height & 1 )
{
return -1;
}
if( p_filter->fmt_in.video.i_width != (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width)
|| p_filter->fmt_in.video.i_height != (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height)
|| p_filter->fmt_in.video.orientation != p_filter->fmt_out.video.orientation)
return -1;
switch( p_filter->fmt_out.video.i_chroma )
{
case VLC_CODEC_I420:
switch( p_filter->fmt_in.video.i_chroma )
{
case VLC_CODEC_YUYV:
p_filter->pf_video_filter = YUY2_I420_Filter;
break;
case VLC_CODEC_YVYU:
p_filter->pf_video_filter = YVYU_I420_Filter;
break;
case VLC_CODEC_UYVY:
p_filter->pf_video_filter = UYVY_I420_Filter;
break;
default:
return -1;
}
break;
default:
return -1;
}
return 0;
}
/* Following functions are local */
VIDEO_FILTER_WRAPPER( YUY2_I420 )
VIDEO_FILTER_WRAPPER( YVYU_I420 )
VIDEO_FILTER_WRAPPER( UYVY_I420 )
/*****************************************************************************
* YUY2_I420: packed YUY2 4:2:2 to planar YUV 4:2:0
*****************************************************************************/
static void YUY2_I420( filter_t *p_filter, picture_t *p_source,
picture_t *p_dest )
{
uint8_t *p_line = p_source->p->p_pixels;
uint8_t *p_y = p_dest->Y_PIXELS;
uint8_t *p_u = p_dest->U_PIXELS;
uint8_t *p_v = p_dest->V_PIXELS;
int i_x, i_y;
const int i_dest_margin = p_dest->p[0].i_pitch
- p_dest->p[0].i_visible_pitch
- p_filter->fmt_out.video.i_x_offset;
const int i_dest_margin_c = p_dest->p[1].i_pitch
- p_dest->p[1].i_visible_pitch
- ( p_filter->fmt_out.video.i_x_offset / 2 );
const int i_source_margin = p_source->p->i_pitch
- p_source->p->i_visible_pitch
- ( p_filter->fmt_in.video.i_x_offset * 2 );
bool b_skip = false;
for( i_y = (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height) ; i_y-- ; )
{
if( b_skip )
{
for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
{
#define C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v ) \
*p_y++ = *p_line++; p_line++; \
*p_y++ = *p_line++; p_line++
C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
}
for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
{
C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
}
}
else
{
for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
{
#define C_YUYV_YUV422( p_line, p_y, p_u, p_v ) \
*p_y++ = *p_line++; *p_u++ = *p_line++; \
*p_y++ = *p_line++; *p_v++ = *p_line++
C_YUYV_YUV422( p_line, p_y, p_u, p_v );
C_YUYV_YUV422( p_line, p_y, p_u, p_v );
C_YUYV_YUV422( p_line, p_y, p_u, p_v );
C_YUYV_YUV422( p_line, p_y, p_u, p_v );
}
for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
{
C_YUYV_YUV422( p_line, p_y, p_u, p_v );
}
p_u += i_dest_margin_c;
p_v += i_dest_margin_c;
}
p_line += i_source_margin;
p_y += i_dest_margin;
b_skip = !b_skip;
}
}
/*****************************************************************************
* YVYU_I420: packed YVYU 4:2:2 to planar YUV 4:2:0
*****************************************************************************/
static void YVYU_I420( filter_t *p_filter, picture_t *p_source,
picture_t *p_dest )
{
uint8_t *p_line = p_source->p->p_pixels;
uint8_t *p_y = p_dest->Y_PIXELS;
uint8_t *p_u = p_dest->U_PIXELS;
uint8_t *p_v = p_dest->V_PIXELS;
int i_x, i_y;
const int i_dest_margin = p_dest->p[0].i_pitch
- p_dest->p[0].i_visible_pitch
- p_filter->fmt_out.video.i_x_offset;
const int i_dest_margin_c = p_dest->p[1].i_pitch
- p_dest->p[1].i_visible_pitch
- ( p_filter->fmt_out.video.i_x_offset / 2 );
const int i_source_margin = p_source->p->i_pitch
- p_source->p->i_visible_pitch
- ( p_filter->fmt_in.video.i_x_offset * 2 );
bool b_skip = false;
for( i_y = (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height) ; i_y-- ; )
{
if( b_skip )
{
for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
{
#define C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v ) \
*p_y++ = *p_line++; p_line++; \
*p_y++ = *p_line++; p_line++
C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
}
for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
{
C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
}
}
else
{
for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
{
#define C_YVYU_YUV422( p_line, p_y, p_u, p_v ) \
*p_y++ = *p_line++; *p_v++ = *p_line++; \
*p_y++ = *p_line++; *p_u++ = *p_line++
C_YVYU_YUV422( p_line, p_y, p_u, p_v );
C_YVYU_YUV422( p_line, p_y, p_u, p_v );
C_YVYU_YUV422( p_line, p_y, p_u, p_v );
C_YVYU_YUV422( p_line, p_y, p_u, p_v );
}
for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
{
C_YVYU_YUV422( p_line, p_y, p_u, p_v );
}
p_u += i_dest_margin_c;
p_v += i_dest_margin_c;
}
p_line += i_source_margin;
p_y += i_dest_margin;
b_skip = !b_skip;
}
}
/*****************************************************************************
* UYVY_I420: packed UYVY 4:2:2 to planar YUV 4:2:0
*****************************************************************************/
static void UYVY_I420( filter_t *p_filter, picture_t *p_source,
picture_t *p_dest )
{
uint8_t *p_line = p_source->p->p_pixels;
uint8_t *p_y = p_dest->Y_PIXELS;
uint8_t *p_u = p_dest->U_PIXELS;
uint8_t *p_v = p_dest->V_PIXELS;
int i_x, i_y;
const int i_dest_margin = p_dest->p[0].i_pitch
- p_dest->p[0].i_visible_pitch
- p_filter->fmt_out.video.i_x_offset;
const int i_dest_margin_c = p_dest->p[1].i_pitch
- p_dest->p[1].i_visible_pitch
- ( p_filter->fmt_out.video.i_x_offset / 2 );
const int i_source_margin = p_source->p->i_pitch
- p_source->p->i_visible_pitch
- ( p_filter->fmt_in.video.i_x_offset * 2 );
bool b_skip = false;
for( i_y = (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height) ; i_y-- ; )
{
if( b_skip )
{
for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
{
#define C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v ) \
*p_u++ = *p_line++; p_line++; \
*p_v++ = *p_line++; p_line++
C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
}
for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
{
C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
}
}
else
{
for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
{
#define C_UYVY_YUV422( p_line, p_y, p_u, p_v ) \
*p_u++ = *p_line++; *p_y++ = *p_line++; \
*p_v++ = *p_line++; *p_y++ = *p_line++
C_UYVY_YUV422( p_line, p_y, p_u, p_v );
C_UYVY_YUV422( p_line, p_y, p_u, p_v );
C_UYVY_YUV422( p_line, p_y, p_u, p_v );
C_UYVY_YUV422( p_line, p_y, p_u, p_v );
}
for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
{
C_UYVY_YUV422( p_line, p_y, p_u, p_v );
}
p_y += i_dest_margin;
}
p_line += i_source_margin;
p_u += i_dest_margin_c;
p_v += i_dest_margin_c;
b_skip = !b_skip;
}
}
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