Fix compilation of modules/video_filter/imgresample.c
[vlc.git] / modules / video_filter / imgresample.c
1 /*****************************************************************************
2  * imageresample.c: scaling and chroma conversion using the old libavcodec API
3  *****************************************************************************
4  * Copyright (C) 1999-2001 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8  *          Gildas Bazin <gbazin@videolan.org>
9  *
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.
14  *
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.
19  *
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  *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_vout.h>
35 #include <vlc_filter.h>
36
37 /* ffmpeg header */
38 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
39 #   include <libavcodec/avcodec.h>
40 #elif defined(HAVE_FFMPEG_AVCODEC_H)
41 #   include <ffmpeg/avcodec.h>
42 #else
43 #   include <avcodec.h>
44 #endif
45
46 #include "../codec/avcodec/avcodec.h"
47
48 /*****************************************************************************
49  * Local prototypes
50  *****************************************************************************/
51 static int  OpenFilter( vlc_object_t * );
52 static void CloseFilter( vlc_object_t * );
53
54 static void Conversion( filter_t *, picture_t *, picture_t * );
55 static picture_t *Conversion_Filter( filter_t *, picture_t * );
56
57 /*****************************************************************************
58  * Module descriptor
59  *****************************************************************************/
60 vlc_module_begin();
61     set_capability( "video filter2", 50 );
62     set_callbacks( OpenFilter, CloseFilter );
63     set_description( N_("FFmpeg video filter") );
64 vlc_module_end();
65
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  *****************************************************************************/
72 struct filter_sys_t
73 {
74     int i_src_vlc_chroma;
75     int i_src_ffmpeg_chroma;
76     int i_dst_vlc_chroma;
77     int i_dst_ffmpeg_chroma;
78     AVPicture tmp_pic;
79     ImgReSampleContext *p_rsc;
80 };
81
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 )
88 {
89     filter_t *p_filter = (filter_t *)p_this;
90     int i_ffmpeg_chroma[2];
91
92     /*
93      * Check the source chroma first, then the destination chroma
94      */
95     if( GetFfmpegChroma( &i_ffmpeg_chroma[0], p_filter->fmt_in.video ) == VLC_EGENERIC )
96         return VLC_EGENERIC;
97     if( GetFfmpegChroma( &i_ffmpeg_chroma[1], p_filter->fmt_out.video ) == VLC_EGENERIC )
98         return VLC_EGENERIC;
99
100     p_filter->pf_video_filter = Conversion_Filter;
101
102     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
103     if( p_filter->p_sys == NULL )
104     {
105         return VLC_ENOMEM;
106     }
107
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];
112
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') ))
117     {
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 );
128     }
129     else
130     {
131         msg_Dbg( p_filter, "no resampling" );
132         p_filter->p_sys->p_rsc = NULL;
133     }
134
135     return VLC_SUCCESS;
136 }
137
138 VIDEO_FILTER_WRAPPER( Conversion )
139
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 )
145 {
146     AVPicture src_pic;
147     AVPicture dest_pic;
148     int i;
149
150     /* Prepare the AVPictures for converion */
151     for( i = 0; i < p_src->i_planes; i++ )
152     {
153         src_pic.data[i] = p_src->p[i].p_pixels;
154         src_pic.linesize[i] = p_src->p[i].i_pitch;
155     }
156     for( i = 0; i < p_dest->i_planes; i++ )
157     {
158         dest_pic.data[i] = p_dest->p[i].p_pixels;
159         dest_pic.linesize[i] = p_dest->p[i].i_pitch;
160     }
161
162     /* Special cases */
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') )
165     {
166         /* Invert U and V */
167         src_pic.data[1] = p_src->p[2].p_pixels;
168         src_pic.data[2] = p_src->p[1].p_pixels;
169     }
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') )
172     {
173         /* Invert U and V */
174         dest_pic.data[1] = p_dest->p[2].p_pixels;
175         dest_pic.data[2] = p_dest->p[1].p_pixels;
176     }
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;
180
181     if( p_filter->p_sys->p_rsc )
182     {
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 );
190     }
191     else
192     {
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 );
197     }
198 }
199
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 )
206 {
207     filter_t *p_filter = (filter_t *)p_this;
208     if( p_filter->p_sys->p_rsc )
209     {
210         img_resample_close( p_filter->p_sys->p_rsc );
211         avpicture_free( &p_filter->p_sys->tmp_pic );
212     }
213     free( p_filter->p_sys );
214 }