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

   1 /*****************************************************************************
   2  * filter.c: video scaling module using the swscale library
   3  *****************************************************************************
   4  * Copyright (C) 2003 VideoLAN
   5  * $Id$
   6  *
   7  * Author: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <vlc/vlc.h>
  28 #include <vlc/decoder.h>
  29 #include "vlc_filter.h"
  30
  31 #include "common.h"
  32 #include "swscale.h"
  33
  34 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
  35
  36 /*****************************************************************************
  37  * filter_sys_t : filter descriptor
  38  *****************************************************************************/
  39 struct filter_sys_t
  40 {
  41     struct SwsContext *ctx;
  42     SwsFilter *p_src_filter;
  43     SwsFilter *p_dst_filter;
  44     int i_cpu_mask, i_sws_flags;
  45
  46     es_format_t fmt_in;
  47     es_format_t fmt_out;
  48 };
  49
  50 /****************************************************************************
  51  * Local prototypes
  52  ****************************************************************************/
  53 static int  OpenFilter ( vlc_object_t * );
  54 static void CloseFilter( vlc_object_t * );
  55
  56 static picture_t *Filter( filter_t *, picture_t * );
  57 static int CheckInit( filter_t * );
  58 static int GetSwscaleChroma( vlc_fourcc_t );
  59
  60 /*****************************************************************************
  61  * Module descriptor
  62  *****************************************************************************/
  63 #define MODE_TEXT N_("Scaling mode")
  64 #define MODE_LONGTEXT N_("You can choose the default scaling mode.")
  65
  66 static int pi_mode_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
  67 static char *ppsz_mode_descriptions[] =
  68 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
  69   N_("Experimental"), N_("Nearest neighbour (bad quality)"),
  70   N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
  71   N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
  72
  73 vlc_module_begin();
  74     set_description( _("Video scaling filter") );
  75     set_capability( "video filter2", 1000 );
  76     set_callbacks( OpenFilter, CloseFilter );
  77
  78     add_integer( "swscale-mode", 0, NULL, MODE_TEXT, MODE_LONGTEXT, VLC_TRUE );
  79         change_integer_list( pi_mode_values, ppsz_mode_descriptions, 0 );
  80 vlc_module_end();
  81
  82 /*****************************************************************************
  83  * OpenFilter: probe the filter and return score
  84  *****************************************************************************/
  85 static int OpenFilter( vlc_object_t *p_this )
  86 {
  87     filter_t *p_filter = (filter_t*)p_this;
  88     filter_sys_t *p_sys;
  89     vlc_value_t val;
  90
  91     unsigned int i_fmt_in, i_fmt_out;
  92     int i_sws_mode;
  93
  94     float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
  95     int sws_chr_vshift = 0, sws_chr_hshift = 0;
  96     float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
  97
  98     /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
  99      * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
 100     if( !(i_fmt_in = GetSwscaleChroma(p_filter->fmt_in.video.i_chroma)) )
 101     {
 102         return VLC_EGENERIC;
 103     }
 104
 105     /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
 106      * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
 107     if( !(i_fmt_out = GetSwscaleChroma(p_filter->fmt_out.video.i_chroma)) )
 108     {
 109         return VLC_EGENERIC;
 110     }
 111
 112     /* Allocate the memory needed to store the decoder's structure */
 113     if( ( p_filter->p_sys = p_sys =
 114           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
 115     {
 116         msg_Err( p_filter, "out of memory" );
 117         return VLC_EGENERIC;
 118     }
 119
 120     swscale_fast_memcpy = p_filter->p_vlc->pf_memcpy;
 121
 122     /* Set CPU capabilities */
 123     p_sys->i_cpu_mask = 0;
 124     if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_MMX )
 125     {
 126         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
 127     }
 128     if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT )
 129     {
 130         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
 131     }
 132     if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_3DNOW )
 133     {
 134         p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
 135     }
 136     if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_ALTIVEC )
 137     {
 138         p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
 139     }
 140
 141     var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 142     var_Get( p_filter, "swscale-mode", &val );
 143     i_sws_mode = val.i_int;
 144
 145     switch( i_sws_mode )
 146     {
 147     case 0:  p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
 148     case 1:  p_sys->i_sws_flags = SWS_BILINEAR; break;
 149     case 2:  p_sys->i_sws_flags = SWS_BICUBIC; break;
 150     case 3:  p_sys->i_sws_flags = SWS_X; break;
 151     case 4:  p_sys->i_sws_flags = SWS_POINT; break;
 152     case 5:  p_sys->i_sws_flags = SWS_AREA; break;
 153     case 6:  p_sys->i_sws_flags = SWS_BICUBLIN; break;
 154     case 7:  p_sys->i_sws_flags = SWS_GAUSS; break;
 155     case 8:  p_sys->i_sws_flags = SWS_SINC; break;
 156     case 9:  p_sys->i_sws_flags = SWS_LANCZOS; break;
 157     case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
 158     default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
 159     }
 160
 161     p_sys->p_src_filter = 0; p_sys->p_dst_filter = 0;
 162     p_sys->p_src_filter =
 163         sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
 164                               sws_lum_sharpen, sws_chr_sharpen,
 165                               sws_chr_hshift, sws_chr_vshift, 0 );
 166
 167     /* Misc init */
 168     p_sys->ctx = NULL;
 169     p_filter->pf_video_filter = Filter;
 170     es_format_Init( &p_sys->fmt_in, 0, 0 );
 171     es_format_Init( &p_sys->fmt_out, 0, 0 );
 172
 173     if( CheckInit( p_filter ) != VLC_SUCCESS )
 174     {
 175         if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 176         free( p_sys );
 177         return VLC_EGENERIC;
 178     }
 179
 180     msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
 181              p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
 182              (char *)&p_filter->fmt_in.video.i_chroma,
 183              p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
 184              (char *)&p_filter->fmt_out.video.i_chroma );
 185
 186     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
 187         p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
 188     {
 189         msg_Dbg( p_filter, "scaling mode: %s",
 190                  ppsz_mode_descriptions[i_sws_mode] );
 191     }
 192
 193     return VLC_SUCCESS;
 194 }
 195
 196 /*****************************************************************************
 197  * CloseFilter: clean up the filter
 198  *****************************************************************************/
 199 static void CloseFilter( vlc_object_t *p_this )
 200 {
 201     filter_t *p_filter = (filter_t*)p_this;
 202     filter_sys_t *p_sys = p_filter->p_sys;
 203
 204     if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 205     if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 206     free( p_sys );
 207 }
 208
 209 /*****************************************************************************
 210  * CheckInit: Initialise filter when necessary
 211  *****************************************************************************/
 212 static int CheckInit( filter_t *p_filter )
 213 {
 214     filter_sys_t *p_sys = p_filter->p_sys;
 215
 216     if( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ||
 217         p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ||
 218         p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ||
 219         p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height )
 220     {
 221         unsigned int i_fmt_in, i_fmt_out;
 222
 223         if( !(i_fmt_in = GetSwscaleChroma(p_filter->fmt_in.video.i_chroma)) ||
 224             !(i_fmt_out = GetSwscaleChroma(p_filter->fmt_out.video.i_chroma)) )
 225         {
 226             msg_Err( p_filter, "format not supported" );
 227             return VLC_EGENERIC;
 228         }
 229
 230         if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 231
 232         p_sys->ctx =
 233             sws_getContext( p_filter->fmt_in.video.i_width,
 234                             p_filter->fmt_in.video.i_height, i_fmt_in,
 235                             p_filter->fmt_out.video.i_width,
 236                             p_filter->fmt_out.video.i_height, i_fmt_out,
 237                             p_sys->i_sws_flags | p_sys->i_cpu_mask,
 238                             p_sys->p_src_filter, p_sys->p_dst_filter );
 239         if( !p_sys->ctx )
 240         {
 241             msg_Err( p_filter, "could not init SwScaler" );
 242             return VLC_EGENERIC;
 243         }
 244
 245         p_sys->fmt_in = p_filter->fmt_in;
 246         p_sys->fmt_out = p_filter->fmt_out;
 247     }
 248
 249     return VLC_SUCCESS;
 250 }
 251
 252 /****************************************************************************
 253  * Filter: the whole thing
 254  ****************************************************************************
 255  * This function is called just after the thread is launched.
 256  ****************************************************************************/
 257 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 258 {
 259     filter_sys_t *p_sys = p_filter->p_sys;
 260     uint8_t *src[3]; int src_stride[3];
 261     uint8_t *dst[3]; int dst_stride[3];
 262     picture_t *p_pic_dst;
 263     int i_plane;
 264
 265     /* Check if format properties changed */
 266     if( CheckInit( p_filter ) != VLC_SUCCESS ) return 0;
 267
 268     /* Request output picture */
 269     p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
 270     if( !p_pic_dst )
 271     {
 272         msg_Warn( p_filter, "can't get output picture" );
 273         return NULL;
 274     }
 275
 276     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 277     {
 278         src[i_plane] = p_pic->p[i_plane].p_pixels;
 279         src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
 280     }
 281     for( i_plane = 0; i_plane < p_pic_dst->i_planes; i_plane++ )
 282     {
 283         dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
 284         dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
 285     }
 286
 287     sws_scale_ordered( p_sys->ctx, src, src_stride,
 288                        0, p_filter->fmt_in.video.i_height,
 289                        dst, dst_stride );
 290
 291     p_pic_dst->date = p_pic->date;
 292     p_pic_dst->b_force = p_pic->b_force;
 293     p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
 294     p_pic_dst->b_progressive = p_pic->b_progressive;
 295     p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
 296
 297     p_pic->pf_release( p_pic );
 298     return p_pic_dst;
 299 }
 300
 301 /*****************************************************************************
 302  * Chroma fourcc -> ffmpeg_id mapping
 303  *****************************************************************************/
 304 static struct
 305 {
 306     vlc_fourcc_t  i_chroma;
 307     unsigned int  i_swscale_chroma;
 308
 309 } chroma_table[] =
 310 {
 311     /* Planar YUV formats */
 312     { VLC_FOURCC('Y','V','1','2'), IMGFMT_YV12 },
 313     { VLC_FOURCC('I','4','2','0'), IMGFMT_I420 },
 314     { VLC_FOURCC('I','Y','U','V'), IMGFMT_IYUV },
 315     { VLC_FOURCC('I','4','4','4'), IMGFMT_444P },
 316     { VLC_FOURCC('I','4','2','2'), IMGFMT_422P },
 317     { VLC_FOURCC('I','4','1','1'), IMGFMT_411P },
 318 #if 0
 319     { VLC_FOURCC('Y','U','V','P'), IMGFMT_Y800 },
 320 #endif
 321
 322     /* Packed YUV formats */
 323     { VLC_FOURCC('U','Y','V','Y'), IMGFMT_UYVY },
 324     { VLC_FOURCC('Y','U','Y','2'), IMGFMT_YUY2 },
 325
 326     /* Packed RGB formats */
 327     { VLC_FOURCC('R','V','1','5'), IMGFMT_RGB15 },
 328     { VLC_FOURCC('R','V','1','6'), IMGFMT_RGB16 },
 329     { VLC_FOURCC('R','V','2','4'), IMGFMT_RGB24 },
 330     { VLC_FOURCC('R','V','3','2'), IMGFMT_RGB32 },
 331     { VLC_FOURCC('G','R','E','Y'), IMGFMT_RGB8 },
 332
 333     {0}
 334 };
 335
 336 static int GetSwscaleChroma( vlc_fourcc_t i_chroma )
 337 {
 338     int i;
 339
 340     for( i = 0; chroma_table[i].i_chroma != 0; i++ )
 341     {
 342         if( chroma_table[i].i_chroma == i_chroma )
 343             return chroma_table[i].i_swscale_chroma;
 344     }
 345     return 0;
 346 }