git.sesse.net Git - vlc/blob - modules/codec/ffmpeg/scale.c

   1 /*****************************************************************************
   2  * filter.c: video scaling module using the swscale library
   3  *****************************************************************************
   4  * Copyright (C) 2003 the VideoLAN team
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <vlc/vlc.h>
  28 #include <vlc/decoder.h>
  29 #include "vlc_filter.h"
  30
  31 /* ffmpeg headers */
  32 #ifdef HAVE_FFMPEG_AVCODEC_H
  33 #   include <ffmpeg/avcodec.h>
  34 #else
  35 #   include <avcodec.h>
  36 #endif
  37
  38 #ifdef HAVE_FFMPEG_SWSCALE_H
  39 #   include <ffmpeg/swscale.h>
  40 #elif defined(HAVE_LIBSWSCALE_TREE)
  41 #   include <swscale.h>
  42 #endif
  43
  44 #include "ffmpeg.h"
  45
  46 /* Version checking */
  47 #if ( (defined(HAVE_FFMPEG_SWSCALE_H) || defined(HAVE_LIBSWSCALE_TREE)) && LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) )
  48
  49 /*****************************************************************************
  50  * filter_sys_t : filter descriptor
  51  *****************************************************************************/
  52 struct filter_sys_t
  53 {
  54     struct SwsContext *ctx;
  55     SwsFilter *p_src_filter;
  56     SwsFilter *p_dst_filter;
  57     int i_cpu_mask, i_sws_flags;
  58
  59     es_format_t fmt_in;
  60     es_format_t fmt_out;
  61 };
  62
  63 /****************************************************************************
  64  * Local prototypes
  65  ****************************************************************************/
  66 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
  67 static picture_t *Filter( filter_t *, picture_t * );
  68 static int CheckInit( filter_t * );
  69
  70 static char *ppsz_mode_descriptions[] =
  71 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
  72   N_("Experimental"), N_("Nearest neighbour (bad quality)"),
  73   N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
  74   N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
  75
  76 /*****************************************************************************
  77  * OpenScaler: probe the filter and return score
  78  *****************************************************************************/
  79 int E_(OpenScaler)( vlc_object_t *p_this )
  80 {
  81     filter_t *p_filter = (filter_t*)p_this;
  82     filter_sys_t *p_sys;
  83     vlc_value_t val;
  84
  85     unsigned int i_fmt_in, i_fmt_out;
  86     int i_sws_mode;
  87
  88     float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
  89     int sws_chr_vshift = 0, sws_chr_hshift = 0;
  90     float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
  91
  92     /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
  93      * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
  94     if( !(i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma)) )
  95     {
  96         return VLC_EGENERIC;
  97     }
  98
  99     /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
 100      * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
 101     if( !(i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma)) )
 102     {
 103         return VLC_EGENERIC;
 104     }
 105
 106     /* Allocate the memory needed to store the decoder's structure */
 107     if( ( p_filter->p_sys = p_sys =
 108           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
 109     {
 110         msg_Err( p_filter, "out of memory" );
 111         return VLC_EGENERIC;
 112     }
 113
 114     swscale_fast_memcpy = p_filter->p_libvlc->pf_memcpy;
 115
 116     /* Set CPU capabilities */
 117     p_sys->i_cpu_mask = 0;
 118     if( p_filter->p_libvlc_global->i_cpu & CPU_CAPABILITY_MMX )
 119     {
 120         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
 121     }
 122     if( p_filter->p_libvlc_global->i_cpu & CPU_CAPABILITY_MMXEXT )
 123     {
 124         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
 125     }
 126     if( p_filter->p_libvlc_global->i_cpu & CPU_CAPABILITY_3DNOW )
 127     {
 128         p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
 129     }
 130     if( p_filter->p_libvlc_global->i_cpu & CPU_CAPABILITY_ALTIVEC )
 131     {
 132         p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
 133     }
 134
 135     var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 136     var_Get( p_filter, "swscale-mode", &val );
 137     i_sws_mode = val.i_int;
 138
 139     switch( i_sws_mode )
 140     {
 141     case 0:  p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
 142     case 1:  p_sys->i_sws_flags = SWS_BILINEAR; break;
 143     case 2:  p_sys->i_sws_flags = SWS_BICUBIC; break;
 144     case 3:  p_sys->i_sws_flags = SWS_X; break;
 145     case 4:  p_sys->i_sws_flags = SWS_POINT; break;
 146     case 5:  p_sys->i_sws_flags = SWS_AREA; break;
 147     case 6:  p_sys->i_sws_flags = SWS_BICUBLIN; break;
 148     case 7:  p_sys->i_sws_flags = SWS_GAUSS; break;
 149     case 8:  p_sys->i_sws_flags = SWS_SINC; break;
 150     case 9:  p_sys->i_sws_flags = SWS_LANCZOS; break;
 151     case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
 152     default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
 153     }
 154
 155     p_sys->p_src_filter = 0; p_sys->p_dst_filter = 0;
 156     p_sys->p_src_filter =
 157         sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
 158                               sws_lum_sharpen, sws_chr_sharpen,
 159                               sws_chr_hshift, sws_chr_vshift, 0 );
 160
 161     /* Misc init */
 162     p_sys->ctx = NULL;
 163     p_filter->pf_video_filter = Filter;
 164     es_format_Init( &p_sys->fmt_in, 0, 0 );
 165     es_format_Init( &p_sys->fmt_out, 0, 0 );
 166
 167     if( CheckInit( p_filter ) != VLC_SUCCESS )
 168     {
 169         if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 170         free( p_sys );
 171         return VLC_EGENERIC;
 172     }
 173
 174     msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
 175              p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
 176              (char *)&p_filter->fmt_in.video.i_chroma,
 177              p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
 178              (char *)&p_filter->fmt_out.video.i_chroma );
 179
 180     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
 181         p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
 182     {
 183         msg_Dbg( p_filter, "scaling mode: %s",
 184                  ppsz_mode_descriptions[i_sws_mode] );
 185     }
 186
 187     return VLC_SUCCESS;
 188 }
 189
 190 /*****************************************************************************
 191  * CloseFilter: clean up the filter
 192  *****************************************************************************/
 193 void E_(CloseScaler)( vlc_object_t *p_this )
 194 {
 195     filter_t *p_filter = (filter_t*)p_this;
 196     filter_sys_t *p_sys = p_filter->p_sys;
 197
 198     if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 199     if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 200     free( p_sys );
 201 }
 202
 203 /*****************************************************************************
 204  * CheckInit: Initialise filter when necessary
 205  *****************************************************************************/
 206 static int CheckInit( filter_t *p_filter )
 207 {
 208     filter_sys_t *p_sys = p_filter->p_sys;
 209
 210     if( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ||
 211         p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ||
 212         p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ||
 213         p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height )
 214     {
 215         unsigned int i_fmt_in, i_fmt_out;
 216
 217         if( !(i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma)) ||
 218             !(i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma)) )
 219         {
 220             msg_Err( p_filter, "format not supported" );
 221             return VLC_EGENERIC;
 222         }
 223
 224         if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 225
 226         p_sys->ctx =
 227             sws_getContext( p_filter->fmt_in.video.i_width,
 228                             p_filter->fmt_in.video.i_height, i_fmt_in,
 229                             p_filter->fmt_out.video.i_width,
 230                             p_filter->fmt_out.video.i_height, i_fmt_out,
 231                             p_sys->i_sws_flags | p_sys->i_cpu_mask,
 232                             p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
 233         if( !p_sys->ctx )
 234         {
 235             msg_Err( p_filter, "could not init SwScaler" );
 236             return VLC_EGENERIC;
 237         }
 238
 239         p_sys->fmt_in = p_filter->fmt_in;
 240         p_sys->fmt_out = p_filter->fmt_out;
 241     }
 242
 243     return VLC_SUCCESS;
 244 }
 245
 246 /****************************************************************************
 247  * Filter: the whole thing
 248  ****************************************************************************
 249  * This function is called just after the thread is launched.
 250  ****************************************************************************/
 251 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 252 {
 253     filter_sys_t *p_sys = p_filter->p_sys;
 254     uint8_t *src[3]; int src_stride[3];
 255     uint8_t *dst[3]; int dst_stride[3];
 256     picture_t *p_pic_dst;
 257     int i_plane;
 258     int i_nb_planes = p_pic->i_planes;
 259
 260     /* Check if format properties changed */
 261     if( CheckInit( p_filter ) != VLC_SUCCESS ) return 0;
 262
 263     /* Request output picture */
 264     p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
 265     if( !p_pic_dst )
 266     {
 267         msg_Warn( p_filter, "can't get output picture" );
 268         return NULL;
 269     }
 270
 271     if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
 272     {
 273         i_nb_planes = 3;
 274         memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
 275                                                  * p_pic_dst->p[3].i_pitch );
 276     }
 277
 278     for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
 279     {
 280         src[i_plane] = p_pic->p[i_plane].p_pixels;
 281         src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
 282     }
 283     for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
 284     {
 285         dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
 286         dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
 287     }
 288
 289     sws_scale_ordered( p_sys->ctx, src, src_stride,
 290                        0, p_filter->fmt_in.video.i_height,
 291                        dst, dst_stride );
 292
 293     p_pic_dst->date = p_pic->date;
 294     p_pic_dst->b_force = p_pic->b_force;
 295     p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
 296     p_pic_dst->b_progressive = p_pic->b_progressive;
 297     p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
 298
 299     p_pic->pf_release( p_pic );
 300     return p_pic_dst;
 301 }
 302
 303 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
 304
 305 int E_(OpenScaler)( vlc_object_t *p_this )
 306 {
 307     return VLC_EGENERIC;
 308 }
 309
 310 void E_(CloseScaler)( vlc_object_t *p_this )
 311 {
 312 }
 313
 314 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
 315