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208 lines
7.0 KiB
208 lines
7.0 KiB
/*****************************************************************************
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* chroma.c: chroma conversion using ffmpeg library
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*****************************************************************************
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* Copyright (C) 1999-2001 VideoLAN
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* $Id: chroma.c,v 1.7 2004/02/27 14:02:05 fenrir Exp $
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*
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* Authors: Gildas Bazin <gbazin@netcourrier.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <vlc/vlc.h>
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#include <vlc/vout.h>
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/* ffmpeg header */
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#ifdef HAVE_FFMPEG_AVCODEC_H
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# include <ffmpeg/avcodec.h>
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#else
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# include <avcodec.h>
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#endif
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#include "ffmpeg.h"
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void E_(InitLibavcodec) ( vlc_object_t *p_object );
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static void ChromaConversion( vout_thread_t *, picture_t *, picture_t * );
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/*****************************************************************************
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* chroma_sys_t: chroma method descriptor
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*****************************************************************************
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* This structure is part of the chroma transformation descriptor, it
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* describes the chroma plugin specific properties.
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*****************************************************************************/
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struct chroma_sys_t
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{
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int i_src_vlc_chroma;
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int i_src_ffmpeg_chroma;
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int i_dst_vlc_chroma;
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int i_dst_ffmpeg_chroma;
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};
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/*****************************************************************************
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* OpenChroma: allocate a chroma function
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*****************************************************************************
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* This function allocates and initializes a chroma function
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*****************************************************************************/
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int E_(OpenChroma)( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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int i_ffmpeg_chroma[2], i_vlc_chroma[2], i;
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/*
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* Check the source chroma first, then the destination chroma
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*/
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i_vlc_chroma[0] = p_vout->render.i_chroma;
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i_vlc_chroma[1] = p_vout->output.i_chroma;
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for( i = 0; i < 2; i++ )
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{
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switch( i_vlc_chroma[i] )
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{
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/* Planar YUV formats */
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case VLC_FOURCC('I','4','4','4'):
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i_ffmpeg_chroma[i] = PIX_FMT_YUV444P;
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break;
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case VLC_FOURCC('I','4','2','2'):
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i_ffmpeg_chroma[i] = PIX_FMT_YUV422P;
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break;
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case VLC_FOURCC('Y','V','1','2'):
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case VLC_FOURCC('I','4','2','0'):
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case VLC_FOURCC('I','Y','U','V'):
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i_ffmpeg_chroma[i] = PIX_FMT_YUV420P;
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break;
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case VLC_FOURCC('I','4','1','1'):
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i_ffmpeg_chroma[i] = PIX_FMT_YUV411P;
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break;
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case VLC_FOURCC('I','4','1','0'):
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case VLC_FOURCC('Y','V','U','9'):
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i_ffmpeg_chroma[i] = PIX_FMT_YUV410P;
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break;
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/* Packed YUV formats */
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case VLC_FOURCC('Y','U','Y','2'):
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case VLC_FOURCC('U','Y','V','Y'):
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i_ffmpeg_chroma[i] = PIX_FMT_YUV422;
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break;
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/* Packed RGB formats */
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case VLC_FOURCC('R','V','3','2'):
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i_ffmpeg_chroma[i] = PIX_FMT_RGBA32;
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break;
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case VLC_FOURCC('R','V','2','4'):
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i_ffmpeg_chroma[i] = PIX_FMT_RGB24;
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//i_ffmpeg_chroma[i] = PIX_FMT_BGR24;
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break;
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case VLC_FOURCC('R','V','1','6'):
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i_ffmpeg_chroma[i] = PIX_FMT_RGB565;
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break;
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case VLC_FOURCC('R','V','1','5'):
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i_ffmpeg_chroma[i] = PIX_FMT_RGB555;
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break;
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case VLC_FOURCC('R','G','B','2'):
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i_ffmpeg_chroma[i] = PIX_FMT_GRAY8;
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break;
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default:
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return VLC_EGENERIC;
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break;
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}
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}
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p_vout->chroma.pf_convert = ChromaConversion;
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p_vout->chroma.p_sys = malloc( sizeof( chroma_sys_t ) );
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if( p_vout->chroma.p_sys == NULL )
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{
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return VLC_EGENERIC;
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}
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p_vout->chroma.p_sys->i_src_vlc_chroma = p_vout->render.i_chroma;
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p_vout->chroma.p_sys->i_dst_vlc_chroma = p_vout->output.i_chroma;
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p_vout->chroma.p_sys->i_src_ffmpeg_chroma = i_ffmpeg_chroma[0];
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p_vout->chroma.p_sys->i_dst_ffmpeg_chroma = i_ffmpeg_chroma[1];
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/* libavcodec needs to be initialized for some chroma conversions */
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E_(InitLibavcodec)(p_this);
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* ChromaConversion: actual chroma conversion function
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*****************************************************************************/
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static void ChromaConversion( vout_thread_t *p_vout,
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picture_t *p_src, picture_t *p_dest )
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{
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AVPicture src_pic;
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AVPicture dest_pic;
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int i;
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/* Prepare the AVPictures for converion */
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for( i = 0; i < p_src->i_planes; i++ )
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{
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src_pic.data[i] = p_src->p[i].p_pixels;
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src_pic.linesize[i] = p_src->p[i].i_pitch;
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}
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for( i = 0; i < p_dest->i_planes; i++ )
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{
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dest_pic.data[i] = p_dest->p[i].p_pixels;
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dest_pic.linesize[i] = p_dest->p[i].i_pitch;
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}
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/* Special cases */
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if( p_vout->chroma.p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
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p_vout->chroma.p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
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{
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/* Invert U and V */
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src_pic.data[1] = p_src->p[2].p_pixels;
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src_pic.data[2] = p_src->p[1].p_pixels;
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}
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if( p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
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p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
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{
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/* Invert U and V */
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dest_pic.data[1] = p_dest->p[2].p_pixels;
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dest_pic.data[2] = p_dest->p[1].p_pixels;
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}
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img_convert( &dest_pic, p_vout->chroma.p_sys->i_dst_ffmpeg_chroma,
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&src_pic, p_vout->chroma.p_sys->i_src_ffmpeg_chroma,
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p_vout->render.i_width, p_vout->render.i_height );
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}
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/*****************************************************************************
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* CloseChroma: free the chroma function
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*****************************************************************************
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* This function frees the previously allocated chroma function
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*****************************************************************************/
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void E_(CloseChroma)( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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free( p_vout->chroma.p_sys );
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}
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