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_codec.h>
  29 #include <vlc_vout.h>
  30 #include <vlc_filter.h>
  31
  32 /* ffmpeg headers */
  33 #ifdef HAVE_FFMPEG_AVCODEC_H
  34 #   include <ffmpeg/avcodec.h>
  35 #else
  36 #   include <avcodec.h>
  37 #endif
  38
  39 #ifdef HAVE_FFMPEG_SWSCALE_H
  40 #   include <ffmpeg/swscale.h>
  41 #elif defined(HAVE_LIBSWSCALE_TREE)
  42 #   include <swscale.h>
  43 #endif
  44
  45 #include "ffmpeg.h"
  46
  47 /* Version checking */
  48 #if ( (defined(HAVE_FFMPEG_SWSCALE_H) || defined(HAVE_LIBSWSCALE_TREE)) && LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) )
  49
  50 /*****************************************************************************
  51  * filter_sys_t : filter descriptor
  52  *****************************************************************************/
  53 struct filter_sys_t
  54 {
  55     struct SwsContext *ctx;
  56     SwsFilter *p_src_filter;
  57     SwsFilter *p_dst_filter;
  58     int i_cpu_mask, i_sws_flags;
  59
  60     es_format_t fmt_in;
  61     es_format_t fmt_out;
  62 };
  63
  64 /****************************************************************************
  65  * Local prototypes
  66  ****************************************************************************/
  67 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
  68 static picture_t *Filter( filter_t *, picture_t * );
  69 static int CheckInit( filter_t * );
  70
  71 static const char *ppsz_mode_descriptions[] =
  72 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
  73   N_("Experimental"), N_("Nearest neighbour (bad quality)"),
  74   N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
  75   N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
  76
  77 /*****************************************************************************
  78  * OpenScaler: probe the filter and return score
  79  *****************************************************************************/
  80 int E_(OpenScaler)( vlc_object_t *p_this )
  81 {
  82     filter_t *p_filter = (filter_t*)p_this;
  83     filter_sys_t *p_sys;
  84     vlc_value_t val;
  85
  86     unsigned int i_fmt_in, i_fmt_out;
  87     int i_sws_mode;
  88
  89     float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
  90     int sws_chr_vshift = 0, sws_chr_hshift = 0;
  91     float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
  92
  93     /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
  94      * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
  95     if( !(i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma)) )
  96     {
  97         return VLC_EGENERIC;
  98     }
  99
 100     /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
 101      * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
 102     if( !(i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma)) )
 103     {
 104         return VLC_EGENERIC;
 105     }
 106
 107     /* Allocate the memory needed to store the decoder's structure */
 108     if( ( p_filter->p_sys = p_sys =
 109           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
 110     {
 111         msg_Err( p_filter, "out of memory" );
 112         return VLC_EGENERIC;
 113     }
 114
 115     swscale_fast_memcpy = p_filter->p_libvlc->pf_memcpy;
 116
 117     /* Set CPU capabilities */
 118     unsigned i_cpu = vlc_CPU();
 119     p_sys->i_cpu_mask = 0;
 120     if( i_cpu & CPU_CAPABILITY_MMX )
 121     {
 122         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
 123     }
 124     if( i_cpu & CPU_CAPABILITY_MMXEXT )
 125     {
 126         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
 127     }
 128     if( i_cpu & CPU_CAPABILITY_3DNOW )
 129     {
 130         p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
 131     }
 132     if( i_cpu & CPU_CAPABILITY_ALTIVEC )
 133     {
 134         p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
 135     }
 136
 137     var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 138     var_Get( p_filter, "swscale-mode", &val );
 139     i_sws_mode = val.i_int;
 140
 141     switch( i_sws_mode )
 142     {
 143     case 0:  p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
 144     case 1:  p_sys->i_sws_flags = SWS_BILINEAR; break;
 145     case 2:  p_sys->i_sws_flags = SWS_BICUBIC; break;
 146     case 3:  p_sys->i_sws_flags = SWS_X; break;
 147     case 4:  p_sys->i_sws_flags = SWS_POINT; break;
 148     case 5:  p_sys->i_sws_flags = SWS_AREA; break;
 149     case 6:  p_sys->i_sws_flags = SWS_BICUBLIN; break;
 150     case 7:  p_sys->i_sws_flags = SWS_GAUSS; break;
 151     case 8:  p_sys->i_sws_flags = SWS_SINC; break;
 152     case 9:  p_sys->i_sws_flags = SWS_LANCZOS; break;
 153     case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
 154     default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
 155     }
 156
 157     p_sys->p_src_filter = 0; p_sys->p_dst_filter = 0;
 158     p_sys->p_src_filter =
 159         sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
 160                               sws_lum_sharpen, sws_chr_sharpen,
 161                               sws_chr_hshift, sws_chr_vshift, 0 );
 162
 163     /* Misc init */
 164     p_sys->ctx = NULL;
 165     p_filter->pf_video_filter = Filter;
 166     es_format_Init( &p_sys->fmt_in, 0, 0 );
 167     es_format_Init( &p_sys->fmt_out, 0, 0 );
 168
 169     if( CheckInit( p_filter ) != VLC_SUCCESS )
 170     {
 171         if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 172         free( p_sys );
 173         return VLC_EGENERIC;
 174     }
 175
 176     msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
 177              p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
 178              (char *)&p_filter->fmt_in.video.i_chroma,
 179              p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
 180              (char *)&p_filter->fmt_out.video.i_chroma );
 181
 182     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
 183         p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
 184     {
 185         msg_Dbg( p_filter, "scaling mode: %s",
 186                  ppsz_mode_descriptions[i_sws_mode] );
 187     }
 188
 189     return VLC_SUCCESS;
 190 }
 191
 192 /*****************************************************************************
 193  * CloseFilter: clean up the filter
 194  *****************************************************************************/
 195 void E_(CloseScaler)( vlc_object_t *p_this )
 196 {
 197     filter_t *p_filter = (filter_t*)p_this;
 198     filter_sys_t *p_sys = p_filter->p_sys;
 199
 200     if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 201     if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
 202     free( p_sys );
 203 }
 204
 205 /*****************************************************************************
 206  * CheckInit: Initialise filter when necessary
 207  *****************************************************************************/
 208 static int CheckInit( filter_t *p_filter )
 209 {
 210     filter_sys_t *p_sys = p_filter->p_sys;
 211
 212     if( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ||
 213         p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ||
 214         p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ||
 215         p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height )
 216     {
 217         unsigned int i_fmt_in, i_fmt_out;
 218
 219         if( !(i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma)) ||
 220             !(i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma)) )
 221         {
 222             msg_Err( p_filter, "format not supported" );
 223             return VLC_EGENERIC;
 224         }
 225
 226         if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
 227
 228         p_sys->ctx =
 229             sws_getContext( p_filter->fmt_in.video.i_width,
 230                             p_filter->fmt_in.video.i_height, i_fmt_in,
 231                             p_filter->fmt_out.video.i_width,
 232                             p_filter->fmt_out.video.i_height, i_fmt_out,
 233                             p_sys->i_sws_flags | p_sys->i_cpu_mask,
 234                             p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
 235         if( !p_sys->ctx )
 236         {
 237             msg_Err( p_filter, "could not init SwScaler" );
 238             return VLC_EGENERIC;
 239         }
 240
 241         p_sys->fmt_in = p_filter->fmt_in;
 242         p_sys->fmt_out = p_filter->fmt_out;
 243     }
 244
 245     return VLC_SUCCESS;
 246 }
 247
 248 /****************************************************************************
 249  * Filter: the whole thing
 250  ****************************************************************************
 251  * This function is called just after the thread is launched.
 252  ****************************************************************************/
 253 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 254 {
 255     filter_sys_t *p_sys = p_filter->p_sys;
 256     uint8_t *src[3]; int src_stride[3];
 257     uint8_t *dst[3]; int dst_stride[3];
 258     picture_t *p_pic_dst;
 259     int i_plane;
 260     int i_nb_planes = p_pic->i_planes;
 261
 262     /* Check if format properties changed */
 263     if( CheckInit( p_filter ) != VLC_SUCCESS ) return 0;
 264
 265     /* Request output picture */
 266     p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
 267     if( !p_pic_dst )
 268     {
 269         msg_Warn( p_filter, "can't get output picture" );
 270         return NULL;
 271     }
 272
 273     if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
 274     {
 275         i_nb_planes = 3;
 276         memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
 277                                                  * p_pic_dst->p[3].i_pitch );
 278     }
 279
 280     for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
 281     {
 282         src[i_plane] = p_pic->p[i_plane].p_pixels;
 283         src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
 284     }
 285     for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
 286     {
 287         dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
 288         dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
 289     }
 290
 291     sws_scale_ordered( p_sys->ctx, src, src_stride,
 292                        0, p_filter->fmt_in.video.i_height,
 293                        dst, dst_stride );
 294
 295     p_pic_dst->date = p_pic->date;
 296     p_pic_dst->b_force = p_pic->b_force;
 297     p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
 298     p_pic_dst->b_progressive = p_pic->b_progressive;
 299     p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
 300
 301     p_pic->pf_release( p_pic );
 302     return p_pic_dst;
 303 }
 304
 305 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
 306
 307 int E_(OpenScaler)( vlc_object_t *p_this )
 308 {
 309     return VLC_EGENERIC;
 310 }
 311
 312 void E_(CloseScaler)( vlc_object_t *p_this )
 313 {
 314 }
 315
 316 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
 317