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