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127 lines
4.4 KiB
127 lines
4.4 KiB
/*****************************************************************************
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* rv32.c: conversion plugin to RV32 format.
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*****************************************************************************
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* Copyright (C) 2005 VLC authors and VideoLAN
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*
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* Author: Cyril Deguet <asmax@videolan.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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#include <vlc_chroma_probe.h>
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/****************************************************************************
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* Local prototypes
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****************************************************************************/
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static int OpenFilter ( filter_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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static void ProbeChroma(vlc_chroma_conv_vec *vec)
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{
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vlc_chroma_conv_add(vec, 1, VLC_CODEC_BGR24, VLC_CODEC_RGBA, false);
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}
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vlc_module_begin ()
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set_description( N_("RV32 conversion filter") )
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set_callback_video_converter( OpenFilter, 1 )
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add_submodule()
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set_callback_chroma_conv_probe(ProbeChroma)
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vlc_module_end ()
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static const struct vlc_filter_operations filter_ops = {
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.filter_video = Filter,
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};
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/*****************************************************************************
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* OpenFilter: probe the filter and return score
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*****************************************************************************/
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static int OpenFilter( filter_t *p_filter )
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{
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/* XXX Only support RV24 -> RV32 conversion */
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if( p_filter->fmt_in.video.i_chroma != VLC_CODEC_BGR24 ||
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p_filter->fmt_out.video.i_chroma != VLC_CODEC_RGBA )
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{
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return VLC_EGENERIC;
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}
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if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
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|| p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_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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p_filter->ops = &filter_ops;
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return VLC_SUCCESS;
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}
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/****************************************************************************
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* Filter: the whole thing
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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_pic_dst;
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int i_plane, i;
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unsigned int j;
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/* Request output picture */
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p_pic_dst = filter_NewPicture( p_filter );
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if( !p_pic_dst )
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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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/* Convert RV24 to RV32 */
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for( i_plane = 0; i_plane < p_pic_dst->i_planes; i_plane++ )
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{
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uint8_t *p_src = p_pic->p[i_plane].p_pixels;
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uint8_t *p_dst = p_pic_dst->p[i_plane].p_pixels;
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unsigned int i_width = p_filter->fmt_out.video.i_width;
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for( i = 0; i < p_pic_dst->p[i_plane].i_lines; i++ )
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{
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for( j = 0; j < i_width; j++ )
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{
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*(p_dst++) = p_src[2];
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*(p_dst++) = p_src[1];
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*(p_dst++) = p_src[0];
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*(p_dst++) = 0xff; /* Alpha */
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p_src += 3;
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}
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p_src += p_pic->p[i_plane].i_pitch - 3 * i_width;
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p_dst += p_pic_dst->p[i_plane].i_pitch - 4 * i_width;
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}
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}
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picture_CopyProperties( p_pic_dst, p_pic );
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picture_Release( p_pic );
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return p_pic_dst;
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}
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