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/*****************************************************************************
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* filter.c: video scaling module using the swscale library
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*****************************************************************************
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* Copyright (C) 2003 the VideoLAN team
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* $Id: e3c50ecacc4fc2d77bc3f91dd67d06ff6aa9d06b $
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* Author: Gildas Bazin <gbazin@videolan.org>
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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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* 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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* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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*****************************************************************************/
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#include <vlc/decoder.h>
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#include "vlc_filter.h"
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void *( *swscale_fast_memcpy )( void *, const void *, size_t );
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/*****************************************************************************
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* filter_sys_t : filter descriptor
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*****************************************************************************/
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struct SwsContext *ctx;
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SwsFilter *p_src_filter;
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SwsFilter *p_dst_filter;
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int i_cpu_mask, i_sws_flags;
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/****************************************************************************
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****************************************************************************/
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static int OpenFilter ( vlc_object_t * );
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static void CloseFilter( vlc_object_t * );
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static picture_t *Filter( filter_t *, picture_t * );
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static int CheckInit( filter_t * );
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static int GetSwscaleChroma( vlc_fourcc_t );
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/*****************************************************************************
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*****************************************************************************/
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#define MODE_TEXT N_("Scaling mode")
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#define MODE_LONGTEXT N_("Scaling mode to use.")
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static int pi_mode_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
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static char *ppsz_mode_descriptions[] =
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{ N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
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N_("Experimental"), N_("Nearest neighbour (bad quality)"),
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N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
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N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
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set_description( _("Video scaling filter") );
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set_capability( "video filter2", 1000 );
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set_category( CAT_VIDEO );
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set_subcategory( SUBCAT_VIDEO_VFILTER );
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set_callbacks( OpenFilter, CloseFilter );
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add_integer( "swscale-mode", 0, NULL, MODE_TEXT, MODE_LONGTEXT, VLC_TRUE );
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change_integer_list( pi_mode_values, ppsz_mode_descriptions, 0 );
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/*****************************************************************************
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* OpenFilter: probe the filter and return score
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*****************************************************************************/
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static int OpenFilter( vlc_object_t *p_this )
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filter_t *p_filter = (filter_t*)p_this;
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unsigned int i_fmt_in, i_fmt_out;
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float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
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int sws_chr_vshift = 0, sws_chr_hshift = 0;
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float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
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/* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
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* BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
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if( !(i_fmt_in = GetSwscaleChroma(p_filter->fmt_in.video.i_chroma)) )
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/* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
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* {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
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if( !(i_fmt_out = GetSwscaleChroma(p_filter->fmt_out.video.i_chroma)) )
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/* Allocate the memory needed to store the decoder's structure */
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if( ( p_filter->p_sys = p_sys =
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(filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
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msg_Err( p_filter, "out of memory" );
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swscale_fast_memcpy = p_filter->p_vlc->pf_memcpy;
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/* Set CPU capabilities */
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p_sys->i_cpu_mask = 0;
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if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_MMX )
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p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
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if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT )
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p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
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if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_3DNOW )
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p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
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if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_ALTIVEC )
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p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
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var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
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var_Get( p_filter, "swscale-mode", &val );
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i_sws_mode = val.i_int;
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case 0: p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
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case 1: p_sys->i_sws_flags = SWS_BILINEAR; break;
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case 2: p_sys->i_sws_flags = SWS_BICUBIC; break;
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case 3: p_sys->i_sws_flags = SWS_X; break;
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case 4: p_sys->i_sws_flags = SWS_POINT; break;
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case 5: p_sys->i_sws_flags = SWS_AREA; break;
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case 6: p_sys->i_sws_flags = SWS_BICUBLIN; break;
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case 7: p_sys->i_sws_flags = SWS_GAUSS; break;
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case 8: p_sys->i_sws_flags = SWS_SINC; break;
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case 9: p_sys->i_sws_flags = SWS_LANCZOS; break;
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case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
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default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
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p_sys->p_src_filter = 0; p_sys->p_dst_filter = 0;
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p_sys->p_src_filter =
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sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
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sws_lum_sharpen, sws_chr_sharpen,
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sws_chr_hshift, sws_chr_vshift, 0 );
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p_filter->pf_video_filter = Filter;
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es_format_Init( &p_sys->fmt_in, 0, 0 );
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es_format_Init( &p_sys->fmt_out, 0, 0 );
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if( CheckInit( p_filter ) != VLC_SUCCESS )
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if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
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msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
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p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
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(char *)&p_filter->fmt_in.video.i_chroma,
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p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
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(char *)&p_filter->fmt_out.video.i_chroma );
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if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
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p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
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msg_Dbg( p_filter, "scaling mode: %s",
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ppsz_mode_descriptions[i_sws_mode] );
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/*****************************************************************************
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* CloseFilter: clean up the filter
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*****************************************************************************/
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static void CloseFilter( vlc_object_t *p_this )
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filter_t *p_filter = (filter_t*)p_this;
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filter_sys_t *p_sys = p_filter->p_sys;
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if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
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if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
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/*****************************************************************************
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* CheckInit: Initialise filter when necessary
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*****************************************************************************/
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static int CheckInit( filter_t *p_filter )
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filter_sys_t *p_sys = p_filter->p_sys;
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if( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ||
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p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ||
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p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ||
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p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height )
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unsigned int i_fmt_in, i_fmt_out;
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if( !(i_fmt_in = GetSwscaleChroma(p_filter->fmt_in.video.i_chroma)) ||
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!(i_fmt_out = GetSwscaleChroma(p_filter->fmt_out.video.i_chroma)) )
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msg_Err( p_filter, "format not supported" );
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if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
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sws_getContext( p_filter->fmt_in.video.i_width,
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p_filter->fmt_in.video.i_height, i_fmt_in,
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p_filter->fmt_out.video.i_width,
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p_filter->fmt_out.video.i_height, i_fmt_out,
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p_sys->i_sws_flags | p_sys->i_cpu_mask,
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p_sys->p_src_filter, p_sys->p_dst_filter );
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msg_Err( p_filter, "could not init SwScaler" );
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p_sys->fmt_in = p_filter->fmt_in;
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p_sys->fmt_out = p_filter->fmt_out;
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/****************************************************************************
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* Filter: the whole thing
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****************************************************************************
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* This function is called just after the thread is launched.
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****************************************************************************/
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static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
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filter_sys_t *p_sys = p_filter->p_sys;
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uint8_t *src[3]; int src_stride[3];
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uint8_t *dst[3]; int dst_stride[3];
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picture_t *p_pic_dst;
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int i_nb_planes = p_pic->i_planes;
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/* Check if format properties changed */
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if( CheckInit( p_filter ) != VLC_SUCCESS ) return 0;
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/* Request output picture */
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p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
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msg_Warn( p_filter, "can't get output picture" );
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if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
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memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
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* p_pic_dst->p[3].i_pitch );
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for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
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src[i_plane] = p_pic->p[i_plane].p_pixels;
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src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
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for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
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dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
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dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
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sws_scale_ordered( p_sys->ctx, src, src_stride,
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0, p_filter->fmt_in.video.i_height,
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p_pic_dst->date = p_pic->date;
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p_pic_dst->b_force = p_pic->b_force;
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p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
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p_pic_dst->b_progressive = p_pic->b_progressive;
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p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
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if( p_pic->pf_release )
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p_pic->pf_release( p_pic );
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/*****************************************************************************
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* Chroma fourcc -> ffmpeg_id mapping
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*****************************************************************************/
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vlc_fourcc_t i_chroma;
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unsigned int i_swscale_chroma;
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/* Planar YUV formats */
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{ VLC_FOURCC('Y','V','1','2'), IMGFMT_YV12 },
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{ VLC_FOURCC('I','4','2','0'), IMGFMT_I420 },
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{ VLC_FOURCC('I','Y','U','V'), IMGFMT_IYUV },
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{ VLC_FOURCC('I','4','4','4'), IMGFMT_444P },
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{ VLC_FOURCC('Y','U','V','A'), IMGFMT_444P },
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{ VLC_FOURCC('I','4','2','2'), IMGFMT_422P },
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{ VLC_FOURCC('I','4','1','1'), IMGFMT_411P },
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{ VLC_FOURCC('Y','U','V','P'), IMGFMT_Y800 },
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/* Packed YUV formats */
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{ VLC_FOURCC('U','Y','V','Y'), IMGFMT_UYVY },
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{ VLC_FOURCC('Y','U','Y','2'), IMGFMT_YUY2 },
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/* Packed RGB formats */
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{ VLC_FOURCC('R','V','1','5'), IMGFMT_RGB15 },
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{ VLC_FOURCC('R','V','1','6'), IMGFMT_RGB16 },
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{ VLC_FOURCC('R','V','2','4'), IMGFMT_RGB24 },
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{ VLC_FOURCC('R','V','3','2'), IMGFMT_RGB32 },
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{ VLC_FOURCC('G','R','E','Y'), IMGFMT_RGB8 },
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static int GetSwscaleChroma( vlc_fourcc_t i_chroma )
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for( i = 0; chroma_table[i].i_chroma != 0; i++ )
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if( chroma_table[i].i_chroma == i_chroma )
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return chroma_table[i].i_swscale_chroma;