git.sesse.net Git - vlc/blob - modules/video_filter/swscale.c

   1 /*****************************************************************************
   2  * swscale.c: scaling and chroma conversion using libswscale
   3  *****************************************************************************
   4  * Copyright (C) 1999-2008 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 #ifdef HAVE_LIBSWSCALE_SWSCALE_H
  38 #   include <libswscale/swscale.h>
  39 #elif defined(HAVE_FFMPEG_SWSCALE_H)
  40 #   include <ffmpeg/swscale.h>
  41 #endif
  42
  43 /* Gruikkkkkkkkkk!!!!! */
  44 #include "../codec/avcodec/chroma.h"
  45
  46 /****************************************************************************
  47  * Local prototypes
  48  ****************************************************************************/
  49 static int  OpenScaler( vlc_object_t * );
  50 static void CloseScaler( vlc_object_t * );
  51
  52 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
  53 static picture_t *Filter( filter_t *, picture_t * );
  54 static int CheckInit( filter_t * );
  55
  56 #define SCALEMODE_TEXT N_("Scaling mode")
  57 #define SCALEMODE_LONGTEXT N_("Scaling mode to use.")
  58
  59 static const int pi_mode_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
  60 const char *const ppsz_mode_descriptions[] =
  61 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
  62   N_("Experimental"), N_("Nearest neighbour (bad quality)"),
  63   N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
  64   N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
  65
  66
  67 /*****************************************************************************
  68  * Module descriptor
  69  *****************************************************************************/
  70 vlc_module_begin();
  71     set_description( N_("Video scaling filter") );
  72     set_capability( "video filter2", 1000 );
  73     set_category( CAT_VIDEO );
  74     set_subcategory( SUBCAT_VIDEO_VFILTER );
  75     set_callbacks( OpenScaler, CloseScaler );
  76     add_integer( "swscale-mode", 2, NULL, SCALEMODE_TEXT, SCALEMODE_LONGTEXT, true );
  77         change_integer_list( pi_mode_values, ppsz_mode_descriptions, 0 );
  78 vlc_module_end();
  79
  80 /* Version checking */
  81 #if LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)
  82 /*****************************************************************************
  83  * filter_sys_t : filter descriptor
  84  *****************************************************************************/
  85 struct filter_sys_t
  86 {
  87     struct SwsContext *ctx;
  88     SwsFilter *p_src_filter;
  89     SwsFilter *p_dst_filter;
  90     int i_cpu_mask, i_sws_flags;
  91
  92     es_format_t fmt_in;
  93     es_format_t fmt_out;
  94 };
  95
  96 /*****************************************************************************
  97  * OpenScaler: probe the filter and return score
  98  *****************************************************************************/
  99 static int OpenScaler( vlc_object_t *p_this )
 100 {
 101     filter_t *p_filter = (filter_t*)p_this;
 102     filter_sys_t *p_sys;
 103     vlc_value_t val;
 104
 105     int i_fmt_in, i_fmt_out;
 106     unsigned int i_cpu;
 107     int i_sws_mode;
 108
 109     float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
 110     int sws_chr_vshift = 0, sws_chr_hshift = 0;
 111     float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
 112
 113     /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
 114      * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
 115     i_fmt_in = GetFfmpegChroma(p_filter->fmt_in.video.i_chroma);
 116     /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
 117      * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
 118     i_fmt_out = GetFfmpegChroma(p_filter->fmt_out.video.i_chroma);
 119     if( ( i_fmt_in < 0 ) || ( i_fmt_out < 0 ) )
 120     {
 121         return VLC_EGENERIC;
 122     }
 123
 124     /* Allocate the memory needed to store the decoder's structure */
 125     if( ( p_filter->p_sys = p_sys =
 126           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
 127     {
 128         return VLC_ENOMEM;
 129     }
 130
 131     swscale_fast_memcpy = vlc_memcpy;
 132
 133     /* Set CPU capabilities */
 134     i_cpu = vlc_CPU();
 135     p_sys->i_cpu_mask = 0;
 136     if( i_cpu & CPU_CAPABILITY_MMX )
 137     {
 138         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
 139     }
 140 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0))
 141     if( i_cpu & CPU_CAPABILITY_MMXEXT )
 142     {
 143         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
 144     }
 145 #endif
 146     if( i_cpu & CPU_CAPABILITY_3DNOW )
 147     {
 148         p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
 149     }
 150     if( i_cpu & CPU_CAPABILITY_ALTIVEC )
 151     {
 152         p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
 153     }
 154
 155     var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 156     var_Get( p_filter, "swscale-mode", &val );
 157     i_sws_mode = val.i_int;
 158
 159     switch( i_sws_mode )
 160     {
 161     case 0:  p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
 162     case 1:  p_sys->i_sws_flags = SWS_BILINEAR; break;
 163     case 2:  p_sys->i_sws_flags = SWS_BICUBIC; break;
 164     case 3:  p_sys->i_sws_flags = SWS_X; break;
 165     case 4:  p_sys->i_sws_flags = SWS_POINT; break;
 166     case 5:  p_sys->i_sws_flags = SWS_AREA; break;
 167     case 6:  p_sys->i_sws_flags = SWS_BICUBLIN; break;
 168     case 7:  p_sys->i_sws_flags = SWS_GAUSS; break;
 169     case 8:  p_sys->i_sws_flags = SWS_SINC; break;
 170     case 9:  p_sys->i_sws_flags = SWS_LANCZOS; break;
 171     case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
 172     default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
 173     }
 174
 175     p_sys->p_src_filter = NULL;
 176     p_sys->p_dst_filter = NULL;
 177     p_sys->p_src_filter =
 178         sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
 179                               sws_lum_sharpen, sws_chr_sharpen,
 180                               sws_chr_hshift, sws_chr_vshift, 0 );
 181
 182     /* Misc init */
 183     p_sys->ctx = NULL;
 184     p_filter->pf_video_filter = Filter;
 185     es_format_Init( &p_sys->fmt_in, 0, 0 );
 186     es_format_Init( &p_sys->fmt_out, 0, 0 );
 187
 188     if( CheckInit( p_filter ) != VLC_SUCCESS )
 189     {
 190         if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 191         free( p_sys );
 192         return VLC_EGENERIC;
 193     }
 194     if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 195     p_sys->ctx = NULL;
 196
 197     msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
 198              p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
 199              (char *)&p_filter->fmt_in.video.i_chroma,
 200              p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
 201              (char *)&p_filter->fmt_out.video.i_chroma );
 202
 203     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
 204         p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
 205     {
 206         msg_Dbg( p_filter, "scaling mode: %s",
 207                  ppsz_mode_descriptions[i_sws_mode] );
 208     }
 209
 210     return VLC_SUCCESS;
 211 }
 212
 213 /*****************************************************************************
 214  * CloseFilter: clean up the filter
 215  *****************************************************************************/
 216 static void CloseScaler( vlc_object_t *p_this )
 217 {
 218     filter_t *p_filter = (filter_t*)p_this;
 219     filter_sys_t *p_sys = p_filter->p_sys;
 220
 221     if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 222     if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 223     free( p_sys );
 224 }
 225
 226 /*****************************************************************************
 227  * CheckInit: Initialise filter when necessary
 228  *****************************************************************************/
 229 static int CheckInit( filter_t *p_filter )
 230 {
 231     filter_sys_t *p_sys = p_filter->p_sys;
 232
 233     if( ( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ) ||
 234         ( p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ) ||
 235         ( p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ) ||
 236         ( p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height ) ||
 237         !p_sys->ctx )
 238     {
 239         int i_fmt_in, i_fmt_out;
 240
 241         i_fmt_in = GetFfmpegChroma(p_filter->fmt_in.video.i_chroma);
 242         i_fmt_out = GetFfmpegChroma(p_filter->fmt_out.video.i_chroma);
 243         if( (i_fmt_in < 0) || (i_fmt_out < 0) )
 244         {
 245             msg_Err( p_filter, "format not supported" );
 246             return VLC_EGENERIC;
 247         }
 248
 249         if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 250
 251         p_sys->ctx =
 252             sws_getContext( p_filter->fmt_in.video.i_width,
 253                             p_filter->fmt_in.video.i_height, i_fmt_in,
 254                             p_filter->fmt_out.video.i_width,
 255                             p_filter->fmt_out.video.i_height, i_fmt_out,
 256                             p_sys->i_sws_flags | p_sys->i_cpu_mask,
 257                             p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
 258         if( !p_sys->ctx )
 259         {
 260             msg_Err( p_filter, "could not init SwScaler" );
 261             return VLC_EGENERIC;
 262         }
 263
 264         p_sys->fmt_in = p_filter->fmt_in;
 265         p_sys->fmt_out = p_filter->fmt_out;
 266     }
 267
 268     return VLC_SUCCESS;
 269 }
 270
 271 /****************************************************************************
 272  * Filter: the whole thing
 273  ****************************************************************************
 274  * This function is called just after the thread is launched.
 275  ****************************************************************************/
 276 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 277 {
 278     filter_sys_t *p_sys = p_filter->p_sys;
 279     uint8_t *src[3]; int src_stride[3];
 280     uint8_t *dst[3]; int dst_stride[3];
 281     picture_t *p_pic_dst;
 282     int i_plane;
 283     int i_nb_planes = p_pic->i_planes;
 284
 285     /* Check if format properties changed */
 286     if( CheckInit( p_filter ) != VLC_SUCCESS )
 287     {
 288         picture_Release( p_pic );
 289         return NULL;
 290     }
 291
 292     /* Request output picture */
 293     p_pic_dst = filter_NewPicture( p_filter );
 294     if( !p_pic_dst )
 295     {
 296         picture_Release( p_pic );
 297         return NULL;
 298     }
 299
 300     if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
 301     {
 302         i_nb_planes = 3;
 303         memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
 304                                                  * p_pic_dst->p[3].i_pitch );
 305     }
 306
 307     for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
 308     {
 309         src[i_plane] = p_pic->p[i_plane].p_pixels;
 310         src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
 311     }
 312     for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
 313     {
 314         dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
 315         dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
 316     }
 317
 318 #if LIBSWSCALE_VERSION_INT  >= ((0<<16)+(5<<8)+0)
 319     sws_scale( p_sys->ctx, src, src_stride,
 320                0, p_filter->fmt_in.video.i_height,
 321                dst, dst_stride );
 322 #else
 323     sws_scale_ordered( p_sys->ctx, src, src_stride,
 324                0, p_filter->fmt_in.video.i_height,
 325                dst, dst_stride );
 326 #endif
 327
 328     picture_CopyProperties( p_pic_dst, p_pic );
 329     picture_Release( p_pic );
 330     return p_pic_dst;
 331 }
 332
 333 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
 334
 335 int OpenScaler( vlc_object_t *p_this )
 336 {
 337     return VLC_EGENERIC;
 338 }
 339
 340 void CloseScaler( vlc_object_t *p_this )
 341 {
 342 }
 343
 344 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */