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 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc_codec.h>
  33 #include <vlc_vout.h>
  34 #include <vlc_filter.h>
  35
  36 /* ffmpeg headers */
  37 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
  38 #   include <libavcodec/avcodec.h>
  39 #elif defined(HAVE_FFMPEG_AVCODEC_H)
  40 #   include <ffmpeg/avcodec.h>
  41 #else
  42 #   include <avcodec.h>
  43 #endif
  44
  45 #ifdef HAVE_LIBSWSCALE_SWSCALE_H
  46 #   include <libswscale/swscale.h>
  47 #elif defined(HAVE_FFMPEG_SWSCALE_H)
  48 #   include <ffmpeg/swscale.h>
  49 #elif defined(HAVE_LIBSWSCALE_TREE)
  50 #   include <swscale.h>
  51 #endif
  52
  53 #include "ffmpeg.h"
  54
  55 /* Version checking */
  56 #if ( (defined(HAVE_LIBSWSCALE_SWSCALE_H) || defined(HAVE_FFMPEG_SWSCALE_H) || defined(HAVE_LIBSWSCALE_TREE)) && (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)) )
  57
  58 /*****************************************************************************
  59  * filter_sys_t : filter descriptor
  60  *****************************************************************************/
  61 struct filter_sys_t
  62 {
  63     struct SwsContext *ctx;
  64     SwsFilter *p_src_filter;
  65     SwsFilter *p_dst_filter;
  66     int i_cpu_mask, i_sws_flags;
  67
  68     es_format_t fmt_in;
  69     es_format_t fmt_out;
  70 };
  71
  72 /****************************************************************************
  73  * Local prototypes
  74  ****************************************************************************/
  75 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
  76 static picture_t *Filter( filter_t *, picture_t * );
  77 static int CheckInit( filter_t * );
  78
  79 static const char *ppsz_mode_descriptions[] =
  80 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
  81   N_("Experimental"), N_("Nearest neighbour (bad quality)"),
  82   N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
  83   N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
  84
  85 /*****************************************************************************
  86  * OpenScaler: probe the filter and return score
  87  *****************************************************************************/
  88 int OpenScaler( vlc_object_t *p_this )
  89 {
  90     filter_t *p_filter = (filter_t*)p_this;
  91     filter_sys_t *p_sys;
  92     vlc_value_t val;
  93
  94     int i_fmt_in, i_fmt_out;
  95     unsigned int i_cpu;
  96     int i_sws_mode;
  97
  98     float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
  99     int sws_chr_vshift = 0, sws_chr_hshift = 0;
 100     float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
 101
 102     /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
 103      * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
 104     i_fmt_in = GetFfmpegChroma(p_filter->fmt_in.video.i_chroma);
 105     /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
 106      * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
 107     i_fmt_out = GetFfmpegChroma(p_filter->fmt_out.video.i_chroma);
 108     if( ( i_fmt_in < 0 ) || ( i_fmt_out < 0 ) )
 109     {
 110         return VLC_EGENERIC;
 111     }
 112
 113     /* Allocate the memory needed to store the decoder's structure */
 114     if( ( p_filter->p_sys = p_sys =
 115           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
 116     {
 117         msg_Err( p_filter, "out of memory" );
 118         return VLC_EGENERIC;
 119     }
 120
 121     swscale_fast_memcpy = vlc_memcpy;
 122
 123     /* Set CPU capabilities */
 124     i_cpu = vlc_CPU();
 125     p_sys->i_cpu_mask = 0;
 126     if( i_cpu & CPU_CAPABILITY_MMX )
 127     {
 128         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
 129     }
 130 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0))
 131     if( i_cpu & CPU_CAPABILITY_MMXEXT )
 132     {
 133         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
 134     }
 135 #endif
 136     if( i_cpu & CPU_CAPABILITY_3DNOW )
 137     {
 138         p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
 139     }
 140     if( i_cpu & CPU_CAPABILITY_ALTIVEC )
 141     {
 142         p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
 143     }
 144
 145     var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 146     var_Get( p_filter, "swscale-mode", &val );
 147     i_sws_mode = val.i_int;
 148
 149     switch( i_sws_mode )
 150     {
 151     case 0:  p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
 152     case 1:  p_sys->i_sws_flags = SWS_BILINEAR; break;
 153     case 2:  p_sys->i_sws_flags = SWS_BICUBIC; break;
 154     case 3:  p_sys->i_sws_flags = SWS_X; break;
 155     case 4:  p_sys->i_sws_flags = SWS_POINT; break;
 156     case 5:  p_sys->i_sws_flags = SWS_AREA; break;
 157     case 6:  p_sys->i_sws_flags = SWS_BICUBLIN; break;
 158     case 7:  p_sys->i_sws_flags = SWS_GAUSS; break;
 159     case 8:  p_sys->i_sws_flags = SWS_SINC; break;
 160     case 9:  p_sys->i_sws_flags = SWS_LANCZOS; break;
 161     case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
 162     default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
 163     }
 164
 165     p_sys->p_src_filter = NULL;
 166     p_sys->p_dst_filter = NULL;
 167     p_sys->p_src_filter =
 168         sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
 169                               sws_lum_sharpen, sws_chr_sharpen,
 170                               sws_chr_hshift, sws_chr_vshift, 0 );
 171
 172     /* Misc init */
 173     p_sys->ctx = NULL;
 174     p_filter->pf_video_filter = Filter;
 175     es_format_Init( &p_sys->fmt_in, 0, 0 );
 176     es_format_Init( &p_sys->fmt_out, 0, 0 );
 177
 178     if( CheckInit( p_filter ) != VLC_SUCCESS )
 179     {
 180         if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 181         free( p_sys );
 182         return VLC_EGENERIC;
 183     }
 184
 185     msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
 186              p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
 187              (char *)&p_filter->fmt_in.video.i_chroma,
 188              p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
 189              (char *)&p_filter->fmt_out.video.i_chroma );
 190
 191     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
 192         p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
 193     {
 194         msg_Dbg( p_filter, "scaling mode: %s",
 195                  ppsz_mode_descriptions[i_sws_mode] );
 196     }
 197
 198     return VLC_SUCCESS;
 199 }
 200
 201 /*****************************************************************************
 202  * CloseFilter: clean up the filter
 203  *****************************************************************************/
 204 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 ) sws_freeContext( p_sys->ctx );
 210     if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 211     free( p_sys );
 212 }
 213
 214 /*****************************************************************************
 215  * CheckInit: Initialise filter when necessary
 216  *****************************************************************************/
 217 static int CheckInit( filter_t *p_filter )
 218 {
 219     filter_sys_t *p_sys = p_filter->p_sys;
 220
 221     if( ( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ) ||
 222         ( p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ) ||
 223         ( p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ) ||
 224         ( p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height ) )
 225     {
 226         int i_fmt_in, i_fmt_out;
 227
 228         i_fmt_in = GetFfmpegChroma(p_filter->fmt_in.video.i_chroma);
 229         i_fmt_out = GetFfmpegChroma(p_filter->fmt_out.video.i_chroma);
 230         if( (i_fmt_in < 0) || (i_fmt_out < 0) )
 231         {
 232             msg_Err( p_filter, "format not supported" );
 233             return VLC_EGENERIC;
 234         }
 235
 236         if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 237
 238         p_sys->ctx =
 239             sws_getContext( p_filter->fmt_in.video.i_width,
 240                             p_filter->fmt_in.video.i_height, i_fmt_in,
 241                             p_filter->fmt_out.video.i_width,
 242                             p_filter->fmt_out.video.i_height, i_fmt_out,
 243                             p_sys->i_sws_flags | p_sys->i_cpu_mask,
 244                             p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
 245         if( !p_sys->ctx )
 246         {
 247             msg_Err( p_filter, "could not init SwScaler" );
 248             return VLC_EGENERIC;
 249         }
 250
 251         p_sys->fmt_in = p_filter->fmt_in;
 252         p_sys->fmt_out = p_filter->fmt_out;
 253     }
 254
 255     return VLC_SUCCESS;
 256 }
 257
 258 /****************************************************************************
 259  * Filter: the whole thing
 260  ****************************************************************************
 261  * This function is called just after the thread is launched.
 262  ****************************************************************************/
 263 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 264 {
 265     filter_sys_t *p_sys = p_filter->p_sys;
 266     uint8_t *src[3]; int src_stride[3];
 267     uint8_t *dst[3]; int dst_stride[3];
 268     picture_t *p_pic_dst;
 269     int i_plane;
 270     int i_nb_planes = p_pic->i_planes;
 271
 272     /* Check if format properties changed */
 273     if( CheckInit( p_filter ) != VLC_SUCCESS ) return NULL;
 274
 275     /* Request output picture */
 276     p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
 277     if( !p_pic_dst )
 278     {
 279         msg_Warn( p_filter, "can't get output picture" );
 280         return NULL;
 281     }
 282
 283     if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
 284     {
 285         i_nb_planes = 3;
 286         memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
 287                                                  * p_pic_dst->p[3].i_pitch );
 288     }
 289
 290     for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
 291     {
 292         src[i_plane] = p_pic->p[i_plane].p_pixels;
 293         src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
 294     }
 295     for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
 296     {
 297         dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
 298         dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
 299     }
 300
 301 #if LIBSWSCALE_VERSION_INT  >= ((0<<16)+(5<<8)+0)
 302     sws_scale( p_sys->ctx, src, src_stride,
 303                0, p_filter->fmt_in.video.i_height,
 304                dst, dst_stride );
 305 #else
 306     sws_scale_ordered( p_sys->ctx, src, src_stride,
 307                0, p_filter->fmt_in.video.i_height,
 308                dst, dst_stride );
 309 #endif
 310
 311     p_pic_dst->date = p_pic->date;
 312     p_pic_dst->b_force = p_pic->b_force;
 313     p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
 314     p_pic_dst->b_progressive = p_pic->b_progressive;
 315     p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
 316
 317     p_pic->pf_release( p_pic );
 318     return p_pic_dst;
 319 }
 320
 321 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
 322
 323 int OpenScaler( vlc_object_t *p_this )
 324 {
 325     return VLC_EGENERIC;
 326 }
 327
 328 void CloseScaler( vlc_object_t *p_this )
 329 {
 330 }
 331
 332 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */