deinterlace.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:5k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * video filter: video filter doing chroma conversion and resizing
- * using the ffmpeg library
- *****************************************************************************
- * Copyright (C) 1999-2001 the VideoLAN team
- * $Id: 4b97455b15fb98b4642b0293860e377b00956e88 $
- *
- * Authors: Gildas Bazin <gbazin@videolan.org>
- *
- * 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_codec.h>
- #include <vlc_vout.h>
- #include <vlc_filter.h>
- /* ffmpeg header */
- #ifdef HAVE_LIBAVCODEC_AVCODEC_H
- # include <libavcodec/avcodec.h>
- #elif defined(HAVE_FFMPEG_AVCODEC_H)
- # include <ffmpeg/avcodec.h>
- #else
- # include <avcodec.h>
- #endif
- #include "avcodec.h"
- static picture_t *Deinterlace( filter_t *p_filter, picture_t *p_pic );
- /*****************************************************************************
- * filter_sys_t : filter descriptor
- *****************************************************************************/
- struct filter_sys_t
- {
- bool b_resize;
- bool b_convert;
- bool b_resize_first;
- bool b_enable_croppadd;
- es_format_t fmt_in;
- int i_src_ffmpeg_chroma;
- es_format_t fmt_out;
- int i_dst_ffmpeg_chroma;
- AVPicture tmp_pic;
- };
- /*****************************************************************************
- * OpenDeinterlace: probe the filter and return score
- *****************************************************************************/
- int OpenDeinterlace( vlc_object_t *p_this )
- {
- filter_t *p_filter = (filter_t*)p_this;
- filter_sys_t *p_sys;
- /* Check if we can handle that formats */
- if( TestFfmpegChroma( -1, p_filter->fmt_in.i_codec ) != VLC_SUCCESS )
- {
- msg_Err( p_filter, "Failed to match chroma type" );
- return VLC_EGENERIC;
- }
- /* Allocate the memory needed to store the decoder's structure */
- if( ( p_filter->p_sys = p_sys =
- (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
- {
- return VLC_EGENERIC;
- }
- /* Misc init */
- p_filter->fmt_in.video.i_chroma = p_filter->fmt_in.i_codec;
- if( GetFfmpegChroma( &p_sys->i_src_ffmpeg_chroma, p_filter->fmt_in.video ) != VLC_SUCCESS )
- {
- msg_Err( p_filter, "Failed to match chroma type" );
- return VLC_EGENERIC;
- }
- p_filter->pf_video_filter = Deinterlace;
- msg_Dbg( p_filter, "deinterlacing" );
- /* libavcodec needs to be initialized for some chroma conversions */
- InitLibavcodec(p_this);
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * CloseDeinterlace: clean up the filter
- *****************************************************************************/
- void CloseDeinterlace( vlc_object_t *p_this )
- {
- filter_t *p_filter = (filter_t*)p_this;
- filter_sys_t *p_sys = p_filter->p_sys;
- free( p_sys );
- }
- /*****************************************************************************
- * Do the processing here
- *****************************************************************************/
- static picture_t *Deinterlace( filter_t *p_filter, picture_t *p_pic )
- {
- filter_sys_t *p_sys = p_filter->p_sys;
- AVPicture src_pic, dest_pic;
- picture_t *p_pic_dst;
- int i, i_res = -1;
- /* Request output picture */
- p_pic_dst = filter_NewPicture( p_filter );
- if( !p_pic_dst )
- {
- picture_Release( p_pic );
- return NULL;
- }
- /* Prepare the AVPictures for the conversion */
- for( i = 0; i < p_pic->i_planes; i++ )
- {
- src_pic.data[i] = p_pic->p[i].p_pixels;
- src_pic.linesize[i] = p_pic->p[i].i_pitch;
- }
- for( i = 0; i < p_pic_dst->i_planes; i++ )
- {
- dest_pic.data[i] = p_pic_dst->p[i].p_pixels;
- dest_pic.linesize[i] = p_pic_dst->p[i].i_pitch;
- }
- i_res = avpicture_deinterlace( &dest_pic, &src_pic, p_sys->i_src_ffmpeg_chroma,
- p_filter->fmt_in.video.i_width,
- p_filter->fmt_in.video.i_height );
- if( i_res == -1 )
- {
- msg_Err( p_filter, "deinterlacing picture failed" );
- filter_DeletePicture( p_filter, p_pic_dst );
- picture_Release( p_pic );
- return NULL;
- }
- picture_CopyProperties( p_pic_dst, p_pic );
- p_pic_dst->b_progressive = true;
- picture_Release( p_pic );
- return p_pic_dst;
- }