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

   1 /*****************************************************************************
   2  * chroma.c: chroma conversion using ffmpeg library
   3  *****************************************************************************
   4  * Copyright (C) 1999-2001 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: 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
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc_vout.h>
  34
  35 #if defined(HAVE_LIBSWSCALE_SWSCALE_H)  || defined(HAVE_FFMPEG_SWSCALE_H) || defined(HAVE_LIBSWSCALE_TREE)
  36 #include <vlc_filter.h>
  37 #endif
  38
  39 /* ffmpeg header */
  40 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
  41 #   include <libavcodec/avcodec.h>
  42 #elif defined(HAVE_FFMPEG_AVCODEC_H)
  43 #   include <ffmpeg/avcodec.h>
  44 #else
  45 #   include <avcodec.h>
  46 #endif
  47
  48 #include "ffmpeg.h"
  49
  50 #if !defined(HAVE_LIBSWSCALE_SWSCALE_H)  && !defined(HAVE_FFMPEG_SWSCALE_H) && !defined(HAVE_LIBSWSCALE_TREE)
  51 void InitLibavcodec ( vlc_object_t *p_object );
  52 static void ChromaConversion( vout_thread_t *, picture_t *, picture_t * );
  53
  54 /*****************************************************************************
  55  * chroma_sys_t: chroma method descriptor
  56  *****************************************************************************
  57  * This structure is part of the chroma transformation descriptor, it
  58  * describes the chroma plugin specific properties.
  59  *****************************************************************************/
  60 struct chroma_sys_t
  61 {
  62     int i_src_vlc_chroma;
  63     int i_src_ffmpeg_chroma;
  64     int i_dst_vlc_chroma;
  65     int i_dst_ffmpeg_chroma;
  66     AVPicture tmp_pic;
  67     ImgReSampleContext *p_rsc;
  68 };
  69
  70 /*****************************************************************************
  71  * OpenChroma: allocate a chroma function
  72  *****************************************************************************
  73  * This function allocates and initializes a chroma function
  74  *****************************************************************************/
  75 int OpenChroma( vlc_object_t *p_this )
  76 {
  77     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  78     int i_ffmpeg_chroma[2], i_vlc_chroma[2], i;
  79
  80     /*
  81      * Check the source chroma first, then the destination chroma
  82      */
  83     i_vlc_chroma[0] = p_vout->render.i_chroma;
  84     i_vlc_chroma[1] = p_vout->output.i_chroma;
  85     for( i = 0; i < 2; i++ )
  86     {
  87         i_ffmpeg_chroma[i] = GetFfmpegChroma( i_vlc_chroma[i] );
  88         if( i_ffmpeg_chroma[i] < 0 ) return VLC_EGENERIC;
  89     }
  90
  91     p_vout->chroma.pf_convert = ChromaConversion;
  92
  93     p_vout->chroma.p_sys = malloc( sizeof( chroma_sys_t ) );
  94     if( p_vout->chroma.p_sys == NULL )
  95     {
  96         return VLC_ENOMEM;
  97     }
  98
  99     p_vout->chroma.p_sys->i_src_vlc_chroma = p_vout->render.i_chroma;
 100     p_vout->chroma.p_sys->i_dst_vlc_chroma = p_vout->output.i_chroma;
 101     p_vout->chroma.p_sys->i_src_ffmpeg_chroma = i_ffmpeg_chroma[0];
 102     p_vout->chroma.p_sys->i_dst_ffmpeg_chroma = i_ffmpeg_chroma[1];
 103
 104     if( ( p_vout->render.i_height != p_vout->output.i_height ||
 105           p_vout->render.i_width != p_vout->output.i_width ) &&
 106         ( p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('I','4','2','0') ||
 107           p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ))
 108     {
 109         msg_Dbg( p_vout, "preparing to resample picture" );
 110         p_vout->chroma.p_sys->p_rsc =
 111             img_resample_init( p_vout->output.i_width, p_vout->output.i_height,
 112                                p_vout->render.i_width, p_vout->render.i_height );
 113         avpicture_alloc( &p_vout->chroma.p_sys->tmp_pic,
 114                          p_vout->chroma.p_sys->i_dst_ffmpeg_chroma,
 115                          p_vout->render.i_width, p_vout->render.i_height );
 116     }
 117     else
 118     {
 119         msg_Dbg( p_vout, "no resampling" );
 120         p_vout->chroma.p_sys->p_rsc = NULL;
 121     }
 122
 123     /* libavcodec needs to be initialized for some chroma conversions */
 124     InitLibavcodec(p_this);
 125
 126     return VLC_SUCCESS;
 127 }
 128
 129 /*****************************************************************************
 130  * ChromaConversion: actual chroma conversion function
 131  *****************************************************************************/
 132 static void ChromaConversion( vout_thread_t *p_vout,
 133                               picture_t *p_src, picture_t *p_dest )
 134 {
 135     AVPicture src_pic;
 136     AVPicture dest_pic;
 137     int i;
 138
 139     /* Prepare the AVPictures for converion */
 140     for( i = 0; i < p_src->i_planes; i++ )
 141     {
 142         src_pic.data[i] = p_src->p[i].p_pixels;
 143         src_pic.linesize[i] = p_src->p[i].i_pitch;
 144     }
 145     for( i = 0; i < p_dest->i_planes; i++ )
 146     {
 147         dest_pic.data[i] = p_dest->p[i].p_pixels;
 148         dest_pic.linesize[i] = p_dest->p[i].i_pitch;
 149     }
 150
 151     /* Special cases */
 152     if( p_vout->chroma.p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
 153         p_vout->chroma.p_sys->i_src_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
 154     {
 155         /* Invert U and V */
 156         src_pic.data[1] = p_src->p[2].p_pixels;
 157         src_pic.data[2] = p_src->p[1].p_pixels;
 158     }
 159     if( p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','1','2') ||
 160         p_vout->chroma.p_sys->i_dst_vlc_chroma == VLC_FOURCC('Y','V','U','9') )
 161     {
 162         /* Invert U and V */
 163         dest_pic.data[1] = p_dest->p[2].p_pixels;
 164         dest_pic.data[2] = p_dest->p[1].p_pixels;
 165     }
 166     if( p_vout->chroma.p_sys->i_src_ffmpeg_chroma == PIX_FMT_RGB24 )
 167         if( p_vout->render.i_bmask == 0x00ff0000 )
 168             p_vout->chroma.p_sys->i_src_ffmpeg_chroma = PIX_FMT_BGR24;
 169
 170     if( p_vout->chroma.p_sys->p_rsc )
 171     {
 172         img_convert( &p_vout->chroma.p_sys->tmp_pic,
 173                      p_vout->chroma.p_sys->i_dst_ffmpeg_chroma,
 174                      &src_pic, p_vout->chroma.p_sys->i_src_ffmpeg_chroma,
 175                      p_vout->render.i_width, p_vout->render.i_height );
 176         img_resample( p_vout->chroma.p_sys->p_rsc, &dest_pic,
 177                       &p_vout->chroma.p_sys->tmp_pic );
 178     }
 179     else
 180     {
 181         img_convert( &dest_pic, p_vout->chroma.p_sys->i_dst_ffmpeg_chroma,
 182                      &src_pic, p_vout->chroma.p_sys->i_src_ffmpeg_chroma,
 183                      p_vout->render.i_width, p_vout->render.i_height );
 184     }
 185 }
 186
 187 /*****************************************************************************
 188  * CloseChroma: free the chroma function
 189  *****************************************************************************
 190  * This function frees the previously allocated chroma function
 191  *****************************************************************************/
 192 void CloseChroma( vlc_object_t *p_this )
 193 {
 194     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 195     if( p_vout->chroma.p_sys->p_rsc )
 196     {
 197         img_resample_close( p_vout->chroma.p_sys->p_rsc );
 198         avpicture_free( &p_vout->chroma.p_sys->tmp_pic );
 199     }
 200     free( p_vout->chroma.p_sys );
 201 }
 202 #else
 203
 204 static void ChromaConversion( vout_thread_t *, picture_t *, picture_t * );
 205
 206 /*****************************************************************************
 207  * chroma_sys_t: chroma method descriptor
 208  *****************************************************************************
 209  * This structure is part of the chroma transformation descriptor, it
 210  * describes the chroma plugin specific properties.
 211  *****************************************************************************/
 212 struct chroma_sys_t
 213 {
 214     filter_t *p_swscaler;
 215 };
 216
 217 /*****************************************************************************
 218  * Video Filter2 functions
 219  *****************************************************************************/
 220 struct filter_owner_sys_t
 221 {
 222     vout_thread_t *p_vout;
 223 };
 224
 225 static void PictureRelease( picture_t *p_pic )
 226 {
 227     free( p_pic->p_data_orig );
 228 }
 229
 230 static picture_t *video_new_buffer_filter( filter_t *p_filter )
 231 {
 232     picture_t *p_picture = malloc( sizeof(picture_t) );
 233     if( !p_picture ) return NULL;
 234     if( vout_AllocatePicture( p_filter, p_picture,
 235                               p_filter->fmt_out.video.i_chroma,
 236                               p_filter->fmt_out.video.i_width,
 237                               p_filter->fmt_out.video.i_height,
 238                               p_filter->fmt_out.video.i_aspect )
 239         != VLC_SUCCESS )
 240     {
 241         free( p_picture );
 242         return NULL;
 243     }
 244
 245     p_picture->pf_release = PictureRelease;
 246
 247     return p_picture;
 248 }
 249
 250 static void video_del_buffer_filter( filter_t *p_filter, picture_t *p_pic )
 251 {
 252     VLC_UNUSED(p_filter);
 253     if( p_pic )
 254     {
 255         free( p_pic->p_data_orig );
 256         free( p_pic );
 257     }
 258 }
 259
 260 /*****************************************************************************
 261  * OpenChroma: allocate a chroma function
 262  *****************************************************************************
 263  * This function allocates and initializes a chroma function
 264  *****************************************************************************/
 265 int OpenChroma( vlc_object_t *p_this )
 266 {
 267     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 268     chroma_sys_t  *p_sys = p_vout->chroma.p_sys;
 269
 270     p_vout->chroma.p_sys = p_sys = malloc( sizeof( chroma_sys_t ) );
 271     if( p_vout->chroma.p_sys == NULL )
 272     {
 273         return VLC_ENOMEM;
 274     }
 275     p_vout->chroma.pf_convert = ChromaConversion;
 276
 277     p_sys->p_swscaler = vlc_object_create( p_vout, VLC_OBJECT_FILTER );
 278     vlc_object_attach( p_sys->p_swscaler, p_vout );
 279
 280     p_sys->p_swscaler->pf_vout_buffer_new = video_new_buffer_filter;
 281     p_sys->p_swscaler->pf_vout_buffer_del = video_del_buffer_filter;
 282
 283     p_sys->p_swscaler->fmt_out.video.i_x_offset =
 284         p_sys->p_swscaler->fmt_out.video.i_y_offset = 0;
 285     p_sys->p_swscaler->fmt_in.video = p_vout->fmt_in;
 286     p_sys->p_swscaler->fmt_out.video = p_vout->fmt_out;
 287     p_sys->p_swscaler->fmt_out.video.i_aspect = p_vout->render.i_aspect;
 288     p_sys->p_swscaler->fmt_in.video.i_chroma = p_vout->render.i_chroma;
 289     p_sys->p_swscaler->fmt_out.video.i_chroma = p_vout->output.i_chroma;
 290
 291     p_sys->p_swscaler->p_module = module_Need( p_sys->p_swscaler,
 292                            "video filter2", 0, 0 );
 293
 294     if( p_sys->p_swscaler->p_module )
 295     {
 296         p_sys->p_swscaler->p_owner =
 297             malloc( sizeof( filter_owner_sys_t ) );
 298         if( p_sys->p_swscaler->p_owner )
 299             p_sys->p_swscaler->p_owner->p_vout = p_vout;
 300     }
 301
 302     if( !p_sys->p_swscaler->p_module || !p_sys->p_swscaler->p_owner )
 303     {
 304         vlc_object_detach( p_sys->p_swscaler );
 305         vlc_object_release( p_sys->p_swscaler );
 306         free( p_vout->chroma.p_sys );
 307         return VLC_EGENERIC;
 308     }
 309
 310     return VLC_SUCCESS;
 311 }
 312
 313 /*****************************************************************************
 314  * ChromaConversion: actual chroma conversion function
 315  *****************************************************************************/
 316 static void ChromaConversion( vout_thread_t *p_vout,
 317                               picture_t *p_src, picture_t *p_dest )
 318 {
 319     chroma_sys_t *p_sys = (chroma_sys_t *) p_vout->chroma.p_sys;
 320
 321     if( p_sys && p_src && p_dest &&
 322         p_sys->p_swscaler && p_sys->p_swscaler->p_module )
 323     {
 324         picture_t *p_pic;
 325
 326         p_sys->p_swscaler->fmt_in.video = p_vout->fmt_in;
 327         p_sys->p_swscaler->fmt_out.video = p_vout->fmt_out;
 328
 329 #if 0
 330         msg_Dbg( p_vout, "chroma %4.4s (%d) to %4.4s (%d)",
 331                  (char *)&p_vout->fmt_in.i_chroma, p_src->i_planes,
 332                  (char *)&p_vout->fmt_out.i_chroma, p_dest->i_planes  );
 333 #endif
 334         p_pic = p_sys->p_swscaler->pf_vout_buffer_new( p_sys->p_swscaler );
 335         if( p_pic )
 336         {
 337             picture_t *p_dst_pic;
 338             vout_CopyPicture( p_vout, p_pic, p_src );
 339             p_dst_pic = p_sys->p_swscaler->pf_video_filter( p_sys->p_swscaler, p_pic );
 340             vout_CopyPicture( p_vout, p_dest, p_dst_pic );
 341             p_dst_pic->pf_release( p_dst_pic );
 342         }
 343     }
 344 }
 345
 346 /*****************************************************************************
 347  * CloseChroma: free the chroma function
 348  *****************************************************************************
 349  * This function frees the previously allocated chroma function
 350  *****************************************************************************/
 351 void CloseChroma( vlc_object_t *p_this )
 352 {
 353     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 354     chroma_sys_t  *p_sys  = (chroma_sys_t *)p_vout->chroma.p_sys;
 355     if( p_sys->p_swscaler && p_sys->p_swscaler->p_module )
 356     {
 357         free( p_sys->p_swscaler->p_owner );
 358         module_Unneed( p_sys->p_swscaler, p_sys->p_swscaler->p_module );
 359         vlc_object_detach( p_sys->p_swscaler );
 360         vlc_object_release( p_sys->p_swscaler );
 361         p_sys->p_swscaler= NULL;
 362     }
 363     free( p_vout->chroma.p_sys );
 364 }
 365
 366 #endif /* !defined(HAVE_LIBSWSCALE_SWSCALE_H)  && !defined(HAVE_FFMPEG_SWSCALE_H) && !defined(HAVE_LIBSWSCALE_TREE) */