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  * Module descriptor
  48  *****************************************************************************/
  49 static int  OpenScaler( vlc_object_t * );
  50 static void CloseScaler( vlc_object_t * );
  51
  52 #define SCALEMODE_TEXT N_("Scaling mode")
  53 #define SCALEMODE_LONGTEXT N_("Scaling mode to use.")
  54
  55 static const int pi_mode_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
  56 const char *const ppsz_mode_descriptions[] =
  57 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
  58   N_("Experimental"), N_("Nearest neighbour (bad quality)"),
  59   N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
  60   N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
  61
  62 vlc_module_begin();
  63     set_description( N_("Video scaling filter") );
  64     set_capability( "video filter2", 1000 );
  65     set_category( CAT_VIDEO );
  66     set_subcategory( SUBCAT_VIDEO_VFILTER );
  67     set_callbacks( OpenScaler, CloseScaler );
  68     add_integer( "swscale-mode", 2, NULL, SCALEMODE_TEXT, SCALEMODE_LONGTEXT, true );
  69         change_integer_list( pi_mode_values, ppsz_mode_descriptions, 0 );
  70 vlc_module_end();
  71
  72 /* Version checking */
  73 #if LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)
  74 /****************************************************************************
  75  * Local prototypes
  76  ****************************************************************************/
  77
  78 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
  79 static picture_t *Filter( filter_t *, picture_t * );
  80 static int CheckInit( filter_t * );
  81
  82 static int GetParameters( int *pi_fmti, int *pi_fmto,
  83                           const video_format_t *p_fmti,
  84                           const video_format_t *p_fmto  );
  85
  86 /*****************************************************************************
  87  * filter_sys_t : filter descriptor
  88  *****************************************************************************/
  89 struct filter_sys_t
  90 {
  91     struct SwsContext *ctx;
  92     SwsFilter *p_src_filter;
  93     SwsFilter *p_dst_filter;
  94     int i_cpu_mask, i_sws_flags;
  95
  96     es_format_t fmt_in;
  97     es_format_t fmt_out;
  98 };
  99
 100
 101 /*****************************************************************************
 102  * OpenScaler: probe the filter and return score
 103  *****************************************************************************/
 104 static int OpenScaler( vlc_object_t *p_this )
 105 {
 106     filter_t *p_filter = (filter_t*)p_this;
 107     filter_sys_t *p_sys;
 108
 109     unsigned int i_cpu;
 110     int i_sws_mode;
 111
 112     float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
 113     int sws_chr_vshift = 0, sws_chr_hshift = 0;
 114     float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
 115
 116     if( GetParameters( NULL, NULL,
 117                        &p_filter->fmt_in.video,
 118                        &p_filter->fmt_out.video ) )
 119     {
 120         return VLC_EGENERIC;
 121     }
 122
 123     /* Allocate the memory needed to store the decoder's structure */
 124     if( ( p_filter->p_sys = p_sys = malloc(sizeof(filter_sys_t)) ) == NULL )
 125     {
 126         return VLC_ENOMEM;
 127     }
 128
 129     swscale_fast_memcpy = vlc_memcpy;   /* FIXME pointer assignment may not be atomic */
 130
 131     /* Set CPU capabilities */
 132     i_cpu = vlc_CPU();
 133     p_sys->i_cpu_mask = 0;
 134     if( i_cpu & CPU_CAPABILITY_MMX )
 135     {
 136         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
 137     }
 138 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0))
 139     if( i_cpu & CPU_CAPABILITY_MMXEXT )
 140     {
 141         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
 142     }
 143 #endif
 144     if( i_cpu & CPU_CAPABILITY_3DNOW )
 145     {
 146         p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
 147     }
 148     if( i_cpu & CPU_CAPABILITY_ALTIVEC )
 149     {
 150         p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
 151     }
 152
 153     i_sws_mode = var_CreateGetInteger( p_filter, "swscale-mode" );
 154
 155     switch( i_sws_mode )
 156     {
 157     case 0:  p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
 158     case 1:  p_sys->i_sws_flags = SWS_BILINEAR; break;
 159     case 2:  p_sys->i_sws_flags = SWS_BICUBIC; break;
 160     case 3:  p_sys->i_sws_flags = SWS_X; break;
 161     case 4:  p_sys->i_sws_flags = SWS_POINT; break;
 162     case 5:  p_sys->i_sws_flags = SWS_AREA; break;
 163     case 6:  p_sys->i_sws_flags = SWS_BICUBLIN; break;
 164     case 7:  p_sys->i_sws_flags = SWS_GAUSS; break;
 165     case 8:  p_sys->i_sws_flags = SWS_SINC; break;
 166     case 9:  p_sys->i_sws_flags = SWS_LANCZOS; break;
 167     case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
 168     default: p_sys->i_sws_flags = SWS_BICUBIC; i_sws_mode = 2; break;
 169     }
 170
 171     p_sys->p_src_filter =
 172         sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
 173                               sws_lum_sharpen, sws_chr_sharpen,
 174                               sws_chr_hshift, sws_chr_vshift, 0 );
 175     p_sys->p_dst_filter = NULL;
 176
 177     /* Misc init */
 178     p_sys->ctx = NULL;
 179     p_filter->pf_video_filter = Filter;
 180     es_format_Init( &p_sys->fmt_in, 0, 0 );
 181     es_format_Init( &p_sys->fmt_out, 0, 0 );
 182
 183     if( CheckInit( p_filter ) )
 184     {
 185         if( p_sys->p_src_filter )
 186             sws_freeFilter( p_sys->p_src_filter );
 187         free( p_sys );
 188         return VLC_EGENERIC;
 189     }
 190
 191     msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s with scaling using %s",
 192              p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
 193              (char *)&p_filter->fmt_in.video.i_chroma,
 194              p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
 195              (char *)&p_filter->fmt_out.video.i_chroma,
 196              ppsz_mode_descriptions[i_sws_mode] );
 197
 198     return VLC_SUCCESS;
 199 }
 200
 201 /*****************************************************************************
 202  * CloseFilter: clean up the filter
 203  *****************************************************************************/
 204 static void CloseScaler( vlc_object_t *p_this )
 205 {
 206     filter_t *p_filter = (filter_t*)p_this;
 207     filter_sys_t *p_sys = p_filter->p_sys;
 208
 209     if( p_sys->ctx )
 210         sws_freeContext( p_sys->ctx );
 211     if( p_sys->p_src_filter )
 212         sws_freeFilter( p_sys->p_src_filter );
 213     free( p_sys );
 214 }
 215
 216 /*****************************************************************************
 217  * CheckInit: Initialise filter when necessary
 218  *****************************************************************************/
 219 static bool IsFmtSimilar( const video_format_t *p_fmt1, const video_format_t *p_fmt2 )
 220 {
 221     return p_fmt1->i_width == p_fmt2->i_width &&
 222            p_fmt1->i_height == p_fmt2->i_height;
 223 }
 224
 225 static int GetParameters( int *pi_fmti, int *pi_fmto,
 226                           const video_format_t *p_fmti,
 227                           const video_format_t *p_fmto  )
 228 {
 229     /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
 230      * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
 231     const int i_fmti = GetFfmpegChroma( p_fmti->i_chroma );
 232
 233     /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
 234      * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
 235     const int i_fmto = GetFfmpegChroma( p_fmto->i_chroma );
 236
 237     if( pi_fmti )
 238         *pi_fmti = i_fmti;
 239     if( pi_fmto )
 240         *pi_fmto = i_fmto;
 241
 242     if( i_fmti < 0 || i_fmto < 0 )
 243         return VLC_EGENERIC;
 244
 245     return VLC_SUCCESS;
 246 }
 247
 248 static int CheckInit( filter_t *p_filter )
 249 {
 250     filter_sys_t *p_sys = p_filter->p_sys;
 251
 252     if( IsFmtSimilar( &p_filter->fmt_in.video,  &p_sys->fmt_in.video ) &&
 253         IsFmtSimilar( &p_filter->fmt_out.video, &p_sys->fmt_out.video ) &&
 254         p_sys->ctx )
 255     {
 256         return VLC_SUCCESS;
 257     }
 258
 259     /* */
 260     int i_fmt_in, i_fmt_out;
 261     if( GetParameters( &i_fmt_in, &i_fmt_out, &p_filter->fmt_in.video, &p_filter->fmt_out.video ) )
 262     {
 263         msg_Err( p_filter, "format not supported" );
 264         return VLC_EGENERIC;
 265     }
 266
 267     if( p_sys->ctx )
 268         sws_freeContext( p_sys->ctx );
 269
 270     p_sys->ctx =
 271         sws_getContext( p_filter->fmt_in.video.i_width,
 272                         p_filter->fmt_in.video.i_height, i_fmt_in,
 273                         p_filter->fmt_out.video.i_width,
 274                         p_filter->fmt_out.video.i_height, i_fmt_out,
 275                         p_sys->i_sws_flags | p_sys->i_cpu_mask,
 276                         p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
 277     if( !p_sys->ctx )
 278     {
 279         msg_Err( p_filter, "could not init SwScaler" );
 280         return VLC_EGENERIC;
 281     }
 282
 283     p_sys->fmt_in = p_filter->fmt_in;
 284     p_sys->fmt_out = p_filter->fmt_out;
 285
 286     return VLC_SUCCESS;
 287 }
 288
 289 static void GetPixels( uint8_t *pp_pixel[3], int pi_pitch[3], picture_t *p_picture )
 290 {
 291     int n;
 292     for( n = 0; n < __MIN(3 , p_picture->i_planes ); n++ )
 293     {
 294         pp_pixel[n] = p_picture->p[n].p_pixels;
 295         pi_pitch[n] = p_picture->p[n].i_pitch;
 296     }
 297 }
 298
 299 /****************************************************************************
 300  * Filter: the whole thing
 301  ****************************************************************************
 302  * This function is called just after the thread is launched.
 303  ****************************************************************************/
 304 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 305 {
 306     filter_sys_t *p_sys = p_filter->p_sys;
 307     uint8_t *src[3]; int src_stride[3];
 308     uint8_t *dst[3]; int dst_stride[3];
 309     picture_t *p_pic_dst;
 310
 311     /* Check if format properties changed */
 312     if( CheckInit( p_filter ) != VLC_SUCCESS )
 313     {
 314         picture_Release( p_pic );
 315         return NULL;
 316     }
 317
 318     /* Request output picture */
 319     p_pic_dst = filter_NewPicture( p_filter );
 320     if( !p_pic_dst )
 321     {
 322         picture_Release( p_pic );
 323         return NULL;
 324     }
 325
 326     if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
 327     {
 328         memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
 329                                                  * p_pic_dst->p[3].i_pitch );
 330     }
 331
 332     GetPixels( src, src_stride, p_pic );
 333     GetPixels( dst, dst_stride, p_pic_dst );
 334
 335 #if LIBSWSCALE_VERSION_INT  >= ((0<<16)+(5<<8)+0)
 336     sws_scale( p_sys->ctx, src, src_stride,
 337                0, p_filter->fmt_in.video.i_height,
 338                dst, dst_stride );
 339 #else
 340     sws_scale_ordered( p_sys->ctx, src, src_stride,
 341                0, p_filter->fmt_in.video.i_height,
 342                dst, dst_stride );
 343 #endif
 344
 345     picture_CopyProperties( p_pic_dst, p_pic );
 346     picture_Release( p_pic );
 347     return p_pic_dst;
 348 }
 349
 350 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
 351
 352 int OpenScaler( vlc_object_t *p_this )
 353 {
 354     return VLC_EGENERIC;
 355 }
 356
 357 void CloseScaler( vlc_object_t *p_this )
 358 {
 359 }
 360
 361 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */