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