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

   1 /*****************************************************************************
   2  * rawvideo.c: Pseudo video decoder/packetizer for raw video data
   3  *****************************************************************************
   4  * Copyright (C) 2001, 2002 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   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
  31 /*****************************************************************************
  32  * decoder_sys_t : raw video decoder descriptor
  33  *****************************************************************************/
  34 struct decoder_sys_t
  35 {
  36     /* Module mode */
  37     vlc_bool_t b_packetizer;
  38
  39     /*
  40      * Input properties
  41      */
  42     int i_raw_size;
  43     vlc_bool_t b_invert;
  44
  45     /*
  46      * Common properties
  47      */
  48     mtime_t i_pts;
  49
  50 };
  51
  52 /****************************************************************************
  53  * Local prototypes
  54  ****************************************************************************/
  55 static int  OpenDecoder   ( vlc_object_t * );
  56 static int  OpenPacketizer( vlc_object_t * );
  57 static void CloseDecoder  ( vlc_object_t * );
  58
  59 static void *DecodeBlock  ( decoder_t *, block_t ** );
  60
  61 static picture_t *DecodeFrame( decoder_t *, block_t * );
  62 static block_t   *SendFrame  ( decoder_t *, block_t * );
  63
  64 /*****************************************************************************
  65  * Module descriptor
  66  *****************************************************************************/
  67 vlc_module_begin();
  68     set_description( _("Pseudo raw video decoder") );
  69     set_capability( "decoder", 50 );
  70     set_category( CAT_INPUT );
  71     set_subcategory( SUBCAT_INPUT_VCODEC );
  72     set_callbacks( OpenDecoder, CloseDecoder );
  73
  74     add_submodule();
  75     set_description( _("Pseudo raw video packetizer") );
  76     set_capability( "packetizer", 100 );
  77     set_callbacks( OpenPacketizer, CloseDecoder );
  78 vlc_module_end();
  79
  80 /*****************************************************************************
  81  * OpenDecoder: probe the decoder and return score
  82  *****************************************************************************/
  83 static int OpenDecoder( vlc_object_t *p_this )
  84 {
  85     decoder_t *p_dec = (decoder_t*)p_this;
  86     decoder_sys_t *p_sys;
  87
  88     switch( p_dec->fmt_in.i_codec )
  89     {
  90         /* Planar YUV */
  91         case VLC_FOURCC('I','4','4','4'):
  92         case VLC_FOURCC('I','4','2','2'):
  93         case VLC_FOURCC('I','4','2','0'):
  94         case VLC_FOURCC('Y','V','1','2'):
  95         case VLC_FOURCC('I','Y','U','V'):
  96         case VLC_FOURCC('I','4','1','1'):
  97         case VLC_FOURCC('I','4','1','0'):
  98         case VLC_FOURCC('Y','V','U','9'):
  99         case VLC_FOURCC('Y','4','2','B'):
 100         case VLC_FOURCC('Y','4','1','B'):
 101
 102         /* Packed YUV */
 103         case VLC_FOURCC('Y','U','Y','2'):
 104         case VLC_FOURCC('Y','8','0','0'):
 105         case VLC_FOURCC('U','Y','V','Y'):
 106         case VLC_FOURCC('H','D','Y','C'):
 107
 108         /* RGB */
 109         case VLC_FOURCC('R','V','3','2'):
 110         case VLC_FOURCC('R','V','2','4'):
 111         case VLC_FOURCC('R','V','1','6'):
 112         case VLC_FOURCC('R','V','1','5'):
 113             break;
 114         case VLC_FOURCC('2','V','u','y'):
 115         case VLC_FOURCC('2','v','u','y'):
 116         case VLC_FOURCC('A','V','U','I'):
 117             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 118             break;
 119         case VLC_FOURCC('y','v','1','2'):
 120             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 121             break;
 122
 123         default:
 124             return VLC_EGENERIC;
 125     }
 126
 127     /* Allocate the memory needed to store the decoder's structure */
 128     if( ( p_dec->p_sys = p_sys =
 129           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 130     {
 131         msg_Err( p_dec, "out of memory" );
 132         return VLC_EGENERIC;
 133     }
 134     /* Misc init */
 135     p_dec->p_sys->b_packetizer = VLC_FALSE;
 136     p_sys->i_pts = 0;
 137     p_sys->b_invert = 0;
 138
 139     if( (int)p_dec->fmt_in.video.i_height < 0 )
 140     {
 141         /* Frames are coded from bottom to top */
 142         p_dec->fmt_in.video.i_height =
 143             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 144         p_sys->b_invert = VLC_TRUE;
 145     }
 146
 147     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 148     {
 149         msg_Err( p_dec, "invalid display size %dx%d",
 150                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 151         return VLC_EGENERIC;
 152     }
 153
 154     /* Find out p_vdec->i_raw_size */
 155     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 156                      p_dec->fmt_in.video.i_width,
 157                      p_dec->fmt_in.video.i_height,
 158                      p_dec->fmt_in.video.i_aspect );
 159     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 160         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 161
 162     /* Set output properties */
 163     p_dec->fmt_out.i_cat = VIDEO_ES;
 164     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 165     if( !p_dec->fmt_in.video.i_aspect )
 166     {
 167         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 168             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 169     }
 170     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 171
 172     if( p_dec->fmt_in.video.i_rmask )
 173         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 174     if( p_dec->fmt_in.video.i_gmask )
 175         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 176     if( p_dec->fmt_in.video.i_bmask )
 177         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 178
 179     /* Set callbacks */
 180     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 181         DecodeBlock;
 182     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 183         DecodeBlock;
 184
 185     return VLC_SUCCESS;
 186 }
 187
 188 static int OpenPacketizer( vlc_object_t *p_this )
 189 {
 190     decoder_t *p_dec = (decoder_t*)p_this;
 191
 192     int i_ret = OpenDecoder( p_this );
 193
 194     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 195
 196     return i_ret;
 197 }
 198
 199 /****************************************************************************
 200  * DecodeBlock: the whole thing
 201  ****************************************************************************
 202  * This function must be fed with complete frames.
 203  ****************************************************************************/
 204 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 205 {
 206     decoder_sys_t *p_sys = p_dec->p_sys;
 207     block_t *p_block;
 208     void *p_buf;
 209
 210     if( !pp_block || !*pp_block ) return NULL;
 211
 212     p_block = *pp_block;
 213
 214     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 215     {
 216         /* We've just started the stream, wait for the first PTS. */
 217         block_Release( p_block );
 218         return NULL;
 219     }
 220
 221     /* Date management */
 222     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 223     {
 224         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 225         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 226     }
 227
 228     if( p_block->i_buffer < p_sys->i_raw_size )
 229     {
 230         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 231                   p_block->i_buffer, p_sys->i_raw_size );
 232
 233         block_Release( p_block );
 234         return NULL;
 235     }
 236
 237     if( p_sys->b_packetizer )
 238     {
 239         p_buf = SendFrame( p_dec, p_block );
 240     }
 241     else
 242     {
 243         p_buf = DecodeFrame( p_dec, p_block );
 244     }
 245
 246     /* Date management: 1 frame per packet */
 247     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 248     *pp_block = NULL;
 249
 250     return p_buf;
 251 }
 252
 253 /*****************************************************************************
 254  * FillPicture:
 255  *****************************************************************************/
 256 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 257 {
 258     uint8_t *p_src, *p_dst;
 259     int i_src, i_plane, i_line, i_width;
 260     decoder_sys_t *p_sys = p_dec->p_sys;
 261
 262     p_src = p_block->p_buffer;
 263     i_src = p_block->i_buffer;
 264
 265     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 266     {
 267         p_dst = p_pic->p[i_plane].p_pixels;
 268         i_width = p_pic->p[i_plane].i_pitch;
 269
 270         if( p_sys->b_invert )
 271             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 272
 273         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 274         {
 275             p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
 276             p_src += p_sys->b_invert ? -i_width : i_width;
 277             p_dst += i_width;
 278         }
 279
 280         if( p_sys->b_invert )
 281             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 282     }
 283 }
 284
 285 /*****************************************************************************
 286  * DecodeFrame: decodes a video frame.
 287  *****************************************************************************/
 288 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 289 {
 290     decoder_sys_t *p_sys = p_dec->p_sys;
 291     picture_t *p_pic;
 292
 293     /* Get a new picture */
 294     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 295     if( !p_pic )
 296     {
 297         block_Release( p_block );
 298         return NULL;
 299     }
 300
 301     FillPicture( p_dec, p_block, p_pic );
 302
 303     p_pic->date = p_sys->i_pts;
 304
 305     block_Release( p_block );
 306     return p_pic;
 307 }
 308
 309 /*****************************************************************************
 310  * SendFrame: send a video frame to the stream output.
 311  *****************************************************************************/
 312 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 313 {
 314     decoder_sys_t *p_sys = p_dec->p_sys;
 315
 316     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 317
 318     if( p_sys->b_invert )
 319     {
 320         picture_t pic;
 321         uint8_t *p_tmp, *p_pixels;
 322         int i, j;
 323
 324         /* Fill in picture_t fields */
 325         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 326                           p_dec->fmt_out.video.i_width,
 327                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 328
 329         if( !pic.i_planes )
 330         {
 331             msg_Err( p_dec, "unsupported chroma" );
 332             return p_block;
 333         }
 334
 335         p_tmp = malloc( pic.p[0].i_pitch );
 336         p_pixels = p_block->p_buffer;
 337         for( i = 0; i < pic.i_planes; i++ )
 338         {
 339             int i_pitch = pic.p[i].i_pitch;
 340             uint8_t *p_top = p_pixels;
 341             uint8_t *p_bottom = p_pixels + i_pitch *
 342                 (pic.p[i].i_visible_lines - 1);
 343
 344             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 345             {
 346                 p_dec->p_libvlc->pf_memcpy( p_tmp, p_bottom,
 347                                          pic.p[i].i_visible_pitch  );
 348                 p_dec->p_libvlc->pf_memcpy( p_bottom, p_top,
 349                                          pic.p[i].i_visible_pitch  );
 350                 p_dec->p_libvlc->pf_memcpy( p_top, p_tmp,
 351                                          pic.p[i].i_visible_pitch  );
 352                 p_top += i_pitch;
 353                 p_bottom -= i_pitch;
 354             }
 355
 356             p_pixels += i_pitch * pic.p[i].i_lines;
 357         }
 358         free( p_tmp );
 359     }
 360
 361     return p_block;
 362 }
 363
 364 /*****************************************************************************
 365  * CloseDecoder: decoder destruction
 366  *****************************************************************************/
 367 static void CloseDecoder( vlc_object_t *p_this )
 368 {
 369     decoder_t *p_dec = (decoder_t*)p_this;
 370     free( p_dec->p_sys );
 371 }