1 /*****************************************************************************
2 * chroma.c: chroma conversion using ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: chroma.c,v 1.7 2004/02/27 14:02:05 fenrir Exp $
7 * Authors: Gildas Bazin <gbazin@netcourrier.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
31 #ifdef HAVE_FFMPEG_AVCODEC_H
32 # include <ffmpeg/avcodec.h>
39 void E_(InitLibavcodec) ( vlc_object_t *p_object );
40 static void ChromaConversion( vout_thread_t *, picture_t *, picture_t * );
42 /*****************************************************************************
43 * chroma_sys_t: chroma method descriptor
44 *****************************************************************************
45 * This structure is part of the chroma transformation descriptor, it
46 * describes the chroma plugin specific properties.
47 *****************************************************************************/
51 int i_src_ffmpeg_chroma;
53 int i_dst_ffmpeg_chroma;
56 /*****************************************************************************
57 * OpenChroma: allocate a chroma function
58 *****************************************************************************
59 * This function allocates and initializes a chroma function
60 *****************************************************************************/
61 int E_(OpenChroma)( vlc_object_t *p_this )
63 vout_thread_t *p_vout = (vout_thread_t *)p_this;
64 int i_ffmpeg_chroma[2], i_vlc_chroma[2], i;
67 * Check the source chroma first, then the destination chroma
69 i_vlc_chroma[0] = p_vout->render.i_chroma;
70 i_vlc_chroma[1] = p_vout->output.i_chroma;
71 for( i = 0; i < 2; i++ )
73 switch( i_vlc_chroma[i] )
76 /* Planar YUV formats */
77 case VLC_FOURCC('I','4','4','4'):
78 i_ffmpeg_chroma[i] = PIX_FMT_YUV444P;
81 case VLC_FOURCC('I','4','2','2'):
82 i_ffmpeg_chroma[i] = PIX_FMT_YUV422P;
85 case VLC_FOURCC('Y','V','1','2'):
86 case VLC_FOURCC('I','4','2','0'):
87 case VLC_FOURCC('I','Y','U','V'):
88 i_ffmpeg_chroma[i] = PIX_FMT_YUV420P;
91 case VLC_FOURCC('I','4','1','1'):
92 i_ffmpeg_chroma[i] = PIX_FMT_YUV411P;
95 case VLC_FOURCC('I','4','1','0'):
96 case VLC_FOURCC('Y','V','U','9'):
97 i_ffmpeg_chroma[i] = PIX_FMT_YUV410P;
100 /* Packed YUV formats */
102 case VLC_FOURCC('Y','U','Y','2'):
103 case VLC_FOURCC('U','Y','V','Y'):
104 i_ffmpeg_chroma[i] = PIX_FMT_YUV422;
107 /* Packed RGB formats */
109 case VLC_FOURCC('R','V','3','2'):
110 i_ffmpeg_chroma[i] = PIX_FMT_RGBA32;
113 case VLC_FOURCC('R','V','2','4'):
114 i_ffmpeg_chroma[i] = PIX_FMT_RGB24;
115 //i_ffmpeg_chroma[i] = PIX_FMT_BGR24;
118 case VLC_FOURCC('R','V','1','6'):
119 i_ffmpeg_chroma[i] = PIX_FMT_RGB565;
122 case VLC_FOURCC('R','V','1','5'):
123 i_ffmpeg_chroma[i] = PIX_FMT_RGB555;
126 case VLC_FOURCC('R','G','B','2'):
127 i_ffmpeg_chroma[i] = PIX_FMT_GRAY8;
136 p_vout->chroma.pf_convert = ChromaConversion;
138 p_vout->chroma.p_sys = malloc( sizeof( chroma_sys_t ) );
139 if( p_vout->chroma.p_sys == NULL )
144 p_vout->chroma.p_sys->i_src_vlc_chroma = p_vout->render.i_chroma;
145 p_vout->chroma.p_sys->i_dst_vlc_chroma = p_vout->output.i_chroma;
146 p_vout->chroma.p_sys->i_src_ffmpeg_chroma = i_ffmpeg_chroma[0];
147 p_vout->chroma.p_sys->i_dst_ffmpeg_chroma = i_ffmpeg_chroma[1];
149 /* libavcodec needs to be initialized for some chroma conversions */
150 E_(InitLibavcodec)(p_this);
155 /*****************************************************************************
156 * ChromaConversion: actual chroma conversion function
157 *****************************************************************************/
158 static void ChromaConversion( vout_thread_t *p_vout,
159 picture_t *p_src, picture_t *p_dest )
165 /* Prepare the AVPictures for converion */
166 for( i = 0; i < p_src->i_planes; i++ )
168 src_pic.data[i] = p_src->p[i].p_pixels;
169 src_pic.linesize[i] = p_src->p[i].i_pitch;
171 for( i = 0; i < p_dest->i_planes; i++ )
173 dest_pic.data[i] = p_dest->p[i].p_pixels;
174 dest_pic.linesize[i] = p_dest->p[i].i_pitch;
178 if( p_vout->chroma.p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
179 p_vout->chroma.p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
182 src_pic.data[1] = p_src->p[2].p_pixels;
183 src_pic.data[2] = p_src->p[1].p_pixels;
185 if( p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
186 p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
189 dest_pic.data[1] = p_dest->p[2].p_pixels;
190 dest_pic.data[2] = p_dest->p[1].p_pixels;
193 img_convert( &dest_pic, p_vout->chroma.p_sys->i_dst_ffmpeg_chroma,
194 &src_pic, p_vout->chroma.p_sys->i_src_ffmpeg_chroma,
195 p_vout->render.i_width, p_vout->render.i_height );
198 /*****************************************************************************
199 * CloseChroma: free the chroma function
200 *****************************************************************************
201 * This function frees the previously allocated chroma function
202 *****************************************************************************/
203 void E_(CloseChroma)( vlc_object_t *p_this )
205 vout_thread_t *p_vout = (vout_thread_t *)p_this;
207 free( p_vout->chroma.p_sys );