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/chroma.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], i_vlc_chroma[2], i;
93 * Check the source chroma first, then the destination chroma
95 i_vlc_chroma[0] = p_filter->fmt_in.video.i_chroma;
96 i_vlc_chroma[1] = p_filter->fmt_out.video.i_chroma;
97 for( i = 0; i < 2; i++ )
99 i_ffmpeg_chroma[i] = GetFfmpegChroma( i_vlc_chroma[i] );
100 if( i_ffmpeg_chroma[i] < 0 ) return VLC_EGENERIC;
103 p_filter->pf_video_filter = Conversion_Filter;
105 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
106 if( p_filter->p_sys == NULL )
111 p_filter->p_sys->i_src_vlc_chroma = p_filter->fmt_in.video.i_chroma;
112 p_filter->p_sys->i_dst_vlc_chroma = p_filter->fmt_out.video.i_chroma;
113 p_filter->p_sys->i_src_ffmpeg_chroma = i_ffmpeg_chroma[0];
114 p_filter->p_sys->i_dst_ffmpeg_chroma = i_ffmpeg_chroma[1];
116 if( ( p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height ||
117 p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ) &&
118 ( p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('I','4','2','0') ||
119 p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ))
121 msg_Dbg( p_filter, "preparing to resample picture" );
122 p_filter->p_sys->p_rsc =
123 img_resample_init( p_filter->fmt_out.video.i_width,
124 p_filter->fmt_out.video.i_height,
125 p_filter->fmt_in.video.i_width,
126 p_filter->fmt_in.video.i_height );
127 avpicture_alloc( &p_filter->p_sys->tmp_pic,
128 p_filter->p_sys->i_dst_ffmpeg_chroma,
129 p_filter->fmt_in.video.i_width,
130 p_filter->fmt_in.video.i_height );
134 msg_Dbg( p_filter, "no resampling" );
135 p_filter->p_sys->p_rsc = NULL;
141 VIDEO_FILTER_WRAPPER( Conversion )
143 /*****************************************************************************
144 * ChromaConversion: actual chroma conversion function
145 *****************************************************************************/
146 static void Conversion( filter_t *p_filter,
147 picture_t *p_src, picture_t *p_dest )
153 /* Prepare the AVPictures for converion */
154 for( i = 0; i < p_src->i_planes; i++ )
156 src_pic.data[i] = p_src->p[i].p_pixels;
157 src_pic.linesize[i] = p_src->p[i].i_pitch;
159 for( i = 0; i < p_dest->i_planes; i++ )
161 dest_pic.data[i] = p_dest->p[i].p_pixels;
162 dest_pic.linesize[i] = p_dest->p[i].i_pitch;
166 if( p_filter->p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
167 p_filter->p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
170 src_pic.data[1] = p_src->p[2].p_pixels;
171 src_pic.data[2] = p_src->p[1].p_pixels;
173 if( p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
174 p_filter->p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
177 dest_pic.data[1] = p_dest->p[2].p_pixels;
178 dest_pic.data[2] = p_dest->p[1].p_pixels;
180 if( p_filter->p_sys->i_src_ffmpeg_chroma == PIX_FMT_RGB24 )
181 if( p_filter->fmt_in.video.i_bmask == 0x00ff0000 )
182 p_filter->p_sys->i_src_ffmpeg_chroma = PIX_FMT_BGR24;
184 if( p_filter->p_sys->p_rsc )
186 img_convert( &p_filter->p_sys->tmp_pic,
187 p_filter->p_sys->i_dst_ffmpeg_chroma,
188 &src_pic, p_filter->p_sys->i_src_ffmpeg_chroma,
189 p_filter->fmt_in.video.i_width,
190 p_filter->fmt_in.video.i_height );
191 img_resample( p_filter->p_sys->p_rsc, &dest_pic,
192 &p_filter->p_sys->tmp_pic );
196 img_convert( &dest_pic, p_filter->p_sys->i_dst_ffmpeg_chroma,
197 &src_pic, p_filter->p_sys->i_src_ffmpeg_chroma,
198 p_filter->fmt_in.video.i_width,
199 p_filter->fmt_in.video.i_height );
203 /*****************************************************************************
204 * CloseFilter: free the chroma function
205 *****************************************************************************
206 * This function frees the previously allocated chroma function
207 *****************************************************************************/
208 void CloseFilter( vlc_object_t *p_this )
210 filter_t *p_filter = (filter_t *)p_this;
211 if( p_filter->p_sys->p_rsc )
213 img_resample_close( p_filter->p_sys->p_rsc );
214 avpicture_free( &p_filter->p_sys->tmp_pic );
216 free( p_filter->p_sys );