/***************************************************************************** * i422_i420.c : Planar YUV 4:2:2 to Planar YUV 4:2:0 conversion module for vlc ***************************************************************************** * Copyright (C) 2000, 2001 - 2007 VLC authors and VideoLAN * $Id$ * * Authors: Samuel Hocevar * Damien Fouilleul * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #define SRC_FOURCC "I422,J422" #define DEST_FOURCC "I420,IYUV,J420,YV12,YUVA" /***************************************************************************** * Local and extern prototypes. *****************************************************************************/ static int Activate ( vlc_object_t * ); static void I422_I420( filter_t *, picture_t *, picture_t * ); static void I422_YV12( filter_t *, picture_t *, picture_t * ); static void I422_YUVA( filter_t *, picture_t *, picture_t * ); static picture_t *I422_I420_Filter( filter_t *, picture_t * ); static picture_t *I422_YV12_Filter( filter_t *, picture_t * ); static picture_t *I422_YUVA_Filter( filter_t *, picture_t * ); /***************************************************************************** * Module descriptor *****************************************************************************/ vlc_module_begin () set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) ) set_capability( "video converter", 60 ) set_callbacks( Activate, NULL ) vlc_module_end () /***************************************************************************** * Activate: allocate a chroma function ***************************************************************************** * This function allocates and initializes a chroma function *****************************************************************************/ static int Activate( vlc_object_t *p_this ) { filter_t *p_filter = (filter_t *)p_this; if( p_filter->fmt_in.video.i_width & 1 || p_filter->fmt_in.video.i_height & 1 ) { return -1; } if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height || p_filter->fmt_in.video.orientation != p_filter->fmt_out.video.orientation ) return -1; switch( p_filter->fmt_in.video.i_chroma ) { case VLC_CODEC_I422: case VLC_CODEC_J422: switch( p_filter->fmt_out.video.i_chroma ) { case VLC_CODEC_I420: case VLC_CODEC_J420: p_filter->pf_video_filter = I422_I420_Filter; break; case VLC_CODEC_YV12: p_filter->pf_video_filter = I422_YV12_Filter; break; case VLC_CODEC_YUV420A: p_filter->pf_video_filter = I422_YUVA_Filter; break; default: return -1; } break; default: return -1; } return 0; } /* Following functions are local */ VIDEO_FILTER_WRAPPER( I422_I420 ) VIDEO_FILTER_WRAPPER( I422_YV12 ) VIDEO_FILTER_WRAPPER( I422_YUVA ) /***************************************************************************** * I422_I420: planar YUV 4:2:2 to planar I420 4:2:0 Y:U:V *****************************************************************************/ static void I422_I420( filter_t *p_filter, picture_t *p_source, picture_t *p_dest ) { uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch; uint16_t i_spy = p_source->p[Y_PLANE].i_pitch; uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch; uint16_t i_spuv = p_source->p[U_PLANE].i_pitch; uint16_t i_width = p_filter->fmt_in.video.i_width; uint16_t i_y = p_filter->fmt_in.video.i_height; uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy; uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy; uint8_t *p_du = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv; uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv; uint8_t *p_dv = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv; uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv; i_y /= 2; for ( ; i_y--; ) { memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy; memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy; memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv; memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv; } } /***************************************************************************** * I422_YV12: planar YUV 4:2:2 to planar YV12 4:2:0 Y:V:U *****************************************************************************/ static void I422_YV12( filter_t *p_filter, picture_t *p_source, picture_t *p_dest ) { uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch; uint16_t i_spy = p_source->p[Y_PLANE].i_pitch; uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch; uint16_t i_spuv = p_source->p[U_PLANE].i_pitch; uint16_t i_width = p_filter->fmt_in.video.i_width; uint16_t i_y = p_filter->fmt_in.video.i_height; uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy; uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy; uint8_t *p_du = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */ uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv; uint8_t *p_dv = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */ uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv; i_y /= 2; for ( ; i_y--; ) { memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy; memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy; memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv; memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv; } } /***************************************************************************** * I422_YUVA: planar YUV 4:2:2 to planar YUVA 4:2:0:4 Y:U:V:A *****************************************************************************/ static void I422_YUVA( filter_t *p_filter, picture_t *p_source, picture_t *p_dest ) { I422_I420( p_filter, p_source, p_dest ); memset( p_dest->p[A_PLANE].p_pixels, 0xff, p_dest->p[A_PLANE].i_lines * p_dest->p[A_PLANE].i_pitch ); }