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https://code.videolan.org/videolan/vlc
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326 lines
13 KiB
C
326 lines
13 KiB
C
/*****************************************************************************
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* yuy2_i420.c : Packed YUV 4:2:2 to Planar YUV conversion module for vlc
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*****************************************************************************
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* Copyright (C) 2007 VLC authors and VideoLAN
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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 it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* 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 <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_filter.h>
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#include <vlc_picture.h>
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#define SRC_FOURCC "YUY2,YUNV,YVYU,UYVY,UYNV,Y422"
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#define DEST_FOURCC "I420"
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/*****************************************************************************
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* Local and extern prototypes.
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*****************************************************************************/
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static int Activate ( vlc_object_t * );
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static void YUY2_I420 ( filter_t *, picture_t *, picture_t * );
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static void YVYU_I420 ( filter_t *, picture_t *, picture_t * );
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static void UYVY_I420 ( filter_t *, picture_t *, picture_t * );
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static picture_t *YUY2_I420_Filter ( filter_t *, picture_t * );
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static picture_t *YVYU_I420_Filter ( filter_t *, picture_t * );
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static picture_t *UYVY_I420_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( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
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set_capability( "video converter", 80 )
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set_callback( Activate )
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vlc_module_end ()
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/*****************************************************************************
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* Activate: allocate a chroma function
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*****************************************************************************
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* This function allocates and initializes a chroma function
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*****************************************************************************/
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static int Activate( 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->fmt_in.video.i_width & 1
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|| p_filter->fmt_in.video.i_height & 1 )
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{
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return -1;
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}
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if( p_filter->fmt_in.video.i_width != (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width)
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|| p_filter->fmt_in.video.i_height != (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height)
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|| p_filter->fmt_in.video.orientation != p_filter->fmt_out.video.orientation)
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return -1;
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switch( p_filter->fmt_out.video.i_chroma )
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{
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case VLC_CODEC_I420:
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switch( p_filter->fmt_in.video.i_chroma )
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{
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case VLC_CODEC_YUYV:
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p_filter->pf_video_filter = YUY2_I420_Filter;
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break;
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case VLC_CODEC_YVYU:
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p_filter->pf_video_filter = YVYU_I420_Filter;
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break;
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case VLC_CODEC_UYVY:
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p_filter->pf_video_filter = UYVY_I420_Filter;
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break;
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default:
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return -1;
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}
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break;
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default:
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return -1;
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}
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return 0;
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}
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/* Following functions are local */
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VIDEO_FILTER_WRAPPER( YUY2_I420 )
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VIDEO_FILTER_WRAPPER( YVYU_I420 )
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VIDEO_FILTER_WRAPPER( UYVY_I420 )
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/*****************************************************************************
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* YUY2_I420: packed YUY2 4:2:2 to planar YUV 4:2:0
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*****************************************************************************/
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static void YUY2_I420( filter_t *p_filter, picture_t *p_source,
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picture_t *p_dest )
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{
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uint8_t *p_line = p_source->p->p_pixels;
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uint8_t *p_y = p_dest->Y_PIXELS;
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uint8_t *p_u = p_dest->U_PIXELS;
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uint8_t *p_v = p_dest->V_PIXELS;
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int i_x, i_y;
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const int i_dest_margin = p_dest->p[0].i_pitch
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- p_dest->p[0].i_visible_pitch
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- p_filter->fmt_out.video.i_x_offset;
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const int i_dest_margin_c = p_dest->p[1].i_pitch
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- p_dest->p[1].i_visible_pitch
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- ( p_filter->fmt_out.video.i_x_offset / 2 );
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const int i_source_margin = p_source->p->i_pitch
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- p_source->p->i_visible_pitch
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- ( p_filter->fmt_in.video.i_x_offset * 2 );
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bool b_skip = false;
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for( i_y = (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height) ; i_y-- ; )
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{
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if( b_skip )
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{
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for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
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{
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#define C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v ) \
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*p_y++ = *p_line++; p_line++; \
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*p_y++ = *p_line++; p_line++
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C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
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C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
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C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
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C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
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}
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for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
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{
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C_YUYV_YUV422_skip( p_line, p_y, p_u, p_v );
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}
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}
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else
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{
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for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
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{
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#define C_YUYV_YUV422( p_line, p_y, p_u, p_v ) \
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*p_y++ = *p_line++; *p_u++ = *p_line++; \
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*p_y++ = *p_line++; *p_v++ = *p_line++
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C_YUYV_YUV422( p_line, p_y, p_u, p_v );
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C_YUYV_YUV422( p_line, p_y, p_u, p_v );
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C_YUYV_YUV422( p_line, p_y, p_u, p_v );
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C_YUYV_YUV422( p_line, p_y, p_u, p_v );
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}
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for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
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{
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C_YUYV_YUV422( p_line, p_y, p_u, p_v );
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}
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p_u += i_dest_margin_c;
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p_v += i_dest_margin_c;
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}
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p_line += i_source_margin;
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p_y += i_dest_margin;
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b_skip = !b_skip;
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}
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}
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/*****************************************************************************
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* YVYU_I420: packed YVYU 4:2:2 to planar YUV 4:2:0
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*****************************************************************************/
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static void YVYU_I420( filter_t *p_filter, picture_t *p_source,
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picture_t *p_dest )
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{
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uint8_t *p_line = p_source->p->p_pixels;
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uint8_t *p_y = p_dest->Y_PIXELS;
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uint8_t *p_u = p_dest->U_PIXELS;
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uint8_t *p_v = p_dest->V_PIXELS;
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int i_x, i_y;
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const int i_dest_margin = p_dest->p[0].i_pitch
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- p_dest->p[0].i_visible_pitch
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- p_filter->fmt_out.video.i_x_offset;
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const int i_dest_margin_c = p_dest->p[1].i_pitch
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- p_dest->p[1].i_visible_pitch
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- ( p_filter->fmt_out.video.i_x_offset / 2 );
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const int i_source_margin = p_source->p->i_pitch
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- p_source->p->i_visible_pitch
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- ( p_filter->fmt_in.video.i_x_offset * 2 );
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bool b_skip = false;
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for( i_y = (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height) ; i_y-- ; )
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{
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if( b_skip )
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{
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for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
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{
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#define C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v ) \
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*p_y++ = *p_line++; p_line++; \
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*p_y++ = *p_line++; p_line++
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C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
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C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
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C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
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C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
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}
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for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
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{
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C_YVYU_YUV422_skip( p_line, p_y, p_u, p_v );
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}
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}
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else
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{
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for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
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{
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#define C_YVYU_YUV422( p_line, p_y, p_u, p_v ) \
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*p_y++ = *p_line++; *p_v++ = *p_line++; \
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*p_y++ = *p_line++; *p_u++ = *p_line++
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C_YVYU_YUV422( p_line, p_y, p_u, p_v );
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C_YVYU_YUV422( p_line, p_y, p_u, p_v );
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C_YVYU_YUV422( p_line, p_y, p_u, p_v );
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C_YVYU_YUV422( p_line, p_y, p_u, p_v );
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}
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for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
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{
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C_YVYU_YUV422( p_line, p_y, p_u, p_v );
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}
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p_u += i_dest_margin_c;
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p_v += i_dest_margin_c;
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}
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p_line += i_source_margin;
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p_y += i_dest_margin;
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b_skip = !b_skip;
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}
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}
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/*****************************************************************************
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* UYVY_I420: packed UYVY 4:2:2 to planar YUV 4:2:0
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*****************************************************************************/
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static void UYVY_I420( filter_t *p_filter, picture_t *p_source,
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picture_t *p_dest )
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{
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uint8_t *p_line = p_source->p->p_pixels;
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uint8_t *p_y = p_dest->Y_PIXELS;
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uint8_t *p_u = p_dest->U_PIXELS;
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uint8_t *p_v = p_dest->V_PIXELS;
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int i_x, i_y;
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const int i_dest_margin = p_dest->p[0].i_pitch
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- p_dest->p[0].i_visible_pitch
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- p_filter->fmt_out.video.i_x_offset;
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const int i_dest_margin_c = p_dest->p[1].i_pitch
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- p_dest->p[1].i_visible_pitch
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- ( p_filter->fmt_out.video.i_x_offset / 2 );
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const int i_source_margin = p_source->p->i_pitch
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- p_source->p->i_visible_pitch
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- ( p_filter->fmt_in.video.i_x_offset * 2 );
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bool b_skip = false;
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for( i_y = (p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height) ; i_y-- ; )
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{
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if( b_skip )
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{
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for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
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{
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#define C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v ) \
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*p_u++ = *p_line++; p_line++; \
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*p_v++ = *p_line++; p_line++
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C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
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C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
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C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
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C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
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}
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for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
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{
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C_UYVY_YUV422_skip( p_line, p_y, p_u, p_v );
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}
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}
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else
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{
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for( i_x = (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) / 8 ; i_x-- ; )
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{
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#define C_UYVY_YUV422( p_line, p_y, p_u, p_v ) \
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*p_u++ = *p_line++; *p_y++ = *p_line++; \
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*p_v++ = *p_line++; *p_y++ = *p_line++
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C_UYVY_YUV422( p_line, p_y, p_u, p_v );
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C_UYVY_YUV422( p_line, p_y, p_u, p_v );
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C_UYVY_YUV422( p_line, p_y, p_u, p_v );
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C_UYVY_YUV422( p_line, p_y, p_u, p_v );
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}
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for( i_x = ( (p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width) % 8 ) / 2; i_x-- ; )
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{
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C_UYVY_YUV422( p_line, p_y, p_u, p_v );
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}
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p_y += i_dest_margin;
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}
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p_line += i_source_margin;
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p_u += i_dest_margin_c;
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p_v += i_dest_margin_c;
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b_skip = !b_skip;
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}
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}
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