1 /*****************************************************************************
2 * imageresample.c: scaling and chroma conversion using the old libavcodec API
3 *****************************************************************************
4 * Copyright (C) 1999-2001 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
35 #include <vlc_filter.h>
38 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
39 # include <libavcodec/avcodec.h>
40 #elif defined(HAVE_FFMPEG_AVCODEC_H)
41 # include <ffmpeg/avcodec.h>
46 #include "../codec/avcodec/avcodec.h"
48 /*****************************************************************************
50 *****************************************************************************/
51 static int OpenFilter( vlc_object_t * );
52 static void CloseFilter( vlc_object_t * );
54 static void Conversion( filter_t *, picture_t *, picture_t * );
55 static picture_t *Conversion_Filter( filter_t *, picture_t * );
57 /*****************************************************************************
59 *****************************************************************************/
61 set_capability( "video filter2", 50 )
62 set_callbacks( OpenFilter, CloseFilter )
63 set_description( N_("FFmpeg video filter") )
66 /*****************************************************************************
67 * chroma_sys_t: chroma method descriptor
68 *****************************************************************************
69 * This structure is part of the chroma transformation descriptor, it
70 * describes the chroma plugin specific properties.
71 *****************************************************************************/
75 int i_src_ffmpeg_chroma;
77 int i_dst_ffmpeg_chroma;
79 ImgReSampleContext *p_rsc;
82 /*****************************************************************************
83 * OpenFilter: allocate a chroma function
84 *****************************************************************************
85 * This function allocates and initializes a chroma function
86 *****************************************************************************/
87 int OpenFilter( vlc_object_t *p_this )
89 filter_t *p_filter = (filter_t *)p_this;
90 int i_ffmpeg_chroma[2];
93 * Check the source chroma first, then the destination chroma
95 if( GetFfmpegChroma( &i_ffmpeg_chroma[0], p_filter->fmt_in.video ) == VLC_EGENERIC )
97 if( GetFfmpegChroma( &i_ffmpeg_chroma[1], p_filter->fmt_out.video ) == VLC_EGENERIC )
100 p_filter->pf_video_filter = Conversion_Filter;
102 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
103 if( p_filter->p_sys == NULL )
108 p_filter->p_sys->i_src_vlc_chroma = p_filter->fmt_in.video.i_chroma;
109 p_filter->p_sys->i_dst_vlc_chroma = p_filter->fmt_out.video.i_chroma;
110 p_filter->p_sys->i_src_ffmpeg_chroma = i_ffmpeg_chroma[0];
111 p_filter->p_sys->i_dst_ffmpeg_chroma = i_ffmpeg_chroma[1];
113 if( ( p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height ||
114 p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ) &&
115 ( p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('I','4','2','0') ||
116 p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ))
118 msg_Dbg( p_filter, "preparing to resample picture" );
119 p_filter->p_sys->p_rsc =
120 img_resample_init( p_filter->fmt_out.video.i_width,
121 p_filter->fmt_out.video.i_height,
122 p_filter->fmt_in.video.i_width,
123 p_filter->fmt_in.video.i_height );
124 avpicture_alloc( &p_filter->p_sys->tmp_pic,
125 p_filter->p_sys->i_dst_ffmpeg_chroma,
126 p_filter->fmt_in.video.i_width,
127 p_filter->fmt_in.video.i_height );
131 msg_Dbg( p_filter, "no resampling" );
132 p_filter->p_sys->p_rsc = NULL;
138 VIDEO_FILTER_WRAPPER( Conversion )
140 /*****************************************************************************
141 * ChromaConversion: actual chroma conversion function
142 *****************************************************************************/
143 static void Conversion( filter_t *p_filter,
144 picture_t *p_src, picture_t *p_dest )
150 /* Prepare the AVPictures for converion */
151 for( i = 0; i < p_src->i_planes; i++ )
153 src_pic.data[i] = p_src->p[i].p_pixels;
154 src_pic.linesize[i] = p_src->p[i].i_pitch;
156 for( i = 0; i < p_dest->i_planes; i++ )
158 dest_pic.data[i] = p_dest->p[i].p_pixels;
159 dest_pic.linesize[i] = p_dest->p[i].i_pitch;
163 if( p_filter->p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
164 p_filter->p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
167 src_pic.data[1] = p_src->p[2].p_pixels;
168 src_pic.data[2] = p_src->p[1].p_pixels;
170 if( p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
171 p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
174 dest_pic.data[1] = p_dest->p[2].p_pixels;
175 dest_pic.data[2] = p_dest->p[1].p_pixels;
177 if( p_filter->p_sys->i_src_ffmpeg_chroma == PIX_FMT_RGB24 )
178 if( p_filter->fmt_in.video.i_bmask == 0x00ff0000 )
179 p_filter->p_sys->i_src_ffmpeg_chroma = PIX_FMT_BGR24;
181 if( p_filter->p_sys->p_rsc )
183 img_convert( &p_filter->p_sys->tmp_pic,
184 p_filter->p_sys->i_dst_ffmpeg_chroma,
185 &src_pic, p_filter->p_sys->i_src_ffmpeg_chroma,
186 p_filter->fmt_in.video.i_width,
187 p_filter->fmt_in.video.i_height );
188 img_resample( p_filter->p_sys->p_rsc, &dest_pic,
189 &p_filter->p_sys->tmp_pic );
193 img_convert( &dest_pic, p_filter->p_sys->i_dst_ffmpeg_chroma,
194 &src_pic, p_filter->p_sys->i_src_ffmpeg_chroma,
195 p_filter->fmt_in.video.i_width,
196 p_filter->fmt_in.video.i_height );
200 /*****************************************************************************
201 * CloseFilter: free the chroma function
202 *****************************************************************************
203 * This function frees the previously allocated chroma function
204 *****************************************************************************/
205 void CloseFilter( vlc_object_t *p_this )
207 filter_t *p_filter = (filter_t *)p_this;
208 if( p_filter->p_sys->p_rsc )
210 img_resample_close( p_filter->p_sys->p_rsc );
211 avpicture_free( &p_filter->p_sys->tmp_pic );
213 free( p_filter->p_sys );