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('U','Y','V','Y'):
 105
 106         /* RGB */
 107         case VLC_FOURCC('R','V','3','2'):
 108         case VLC_FOURCC('R','V','2','4'):
 109         case VLC_FOURCC('R','V','1','6'):
 110         case VLC_FOURCC('R','V','1','5'):
 111             break;
 112         case VLC_FOURCC('2','V','u','y'):
 113         case VLC_FOURCC('2','v','u','y'):
 114         case VLC_FOURCC('A','V','U','I'):
 115             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 116             break;
 117         case VLC_FOURCC('y','v','1','2'):
 118             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 119             break;
 120
 121         default:
 122             return VLC_EGENERIC;
 123     }
 124
 125     /* Allocate the memory needed to store the decoder's structure */
 126     if( ( p_dec->p_sys = p_sys =
 127           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 128     {
 129         msg_Err( p_dec, "out of memory" );
 130         return VLC_EGENERIC;
 131     }
 132     /* Misc init */
 133     p_dec->p_sys->b_packetizer = VLC_FALSE;
 134     p_sys->i_pts = 0;
 135     p_sys->b_invert = 0;
 136
 137     if( (int)p_dec->fmt_in.video.i_height < 0 )
 138     {
 139         /* Frames are coded from bottom to top */
 140         p_dec->fmt_in.video.i_height =
 141             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 142         p_sys->b_invert = VLC_TRUE;
 143     }
 144
 145     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 146     {
 147         msg_Err( p_dec, "invalid display size %dx%d",
 148                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 149         return VLC_EGENERIC;
 150     }
 151
 152     /* Find out p_vdec->i_raw_size */
 153     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 154                      p_dec->fmt_in.video.i_width,
 155                      p_dec->fmt_in.video.i_height,
 156                      p_dec->fmt_in.video.i_aspect );
 157     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 158         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 159
 160     /* Set output properties */
 161     p_dec->fmt_out.i_cat = VIDEO_ES;
 162     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 163     if( !p_dec->fmt_in.video.i_aspect )
 164     {
 165         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 166             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 167     }
 168     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 169
 170     if( p_dec->fmt_in.video.i_rmask )
 171         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 172     if( p_dec->fmt_in.video.i_gmask )
 173         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 174     if( p_dec->fmt_in.video.i_bmask )
 175         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 176
 177     /* Set callbacks */
 178     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 179         DecodeBlock;
 180     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 181         DecodeBlock;
 182
 183     return VLC_SUCCESS;
 184 }
 185
 186 static int OpenPacketizer( vlc_object_t *p_this )
 187 {
 188     decoder_t *p_dec = (decoder_t*)p_this;
 189
 190     int i_ret = OpenDecoder( p_this );
 191
 192     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 193
 194     return i_ret;
 195 }
 196
 197 /****************************************************************************
 198  * DecodeBlock: the whole thing
 199  ****************************************************************************
 200  * This function must be fed with complete frames.
 201  ****************************************************************************/
 202 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 203 {
 204     decoder_sys_t *p_sys = p_dec->p_sys;
 205     block_t *p_block;
 206     void *p_buf;
 207
 208     if( !pp_block || !*pp_block ) return NULL;
 209
 210     p_block = *pp_block;
 211
 212     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 213     {
 214         /* We've just started the stream, wait for the first PTS. */
 215         block_Release( p_block );
 216         return NULL;
 217     }
 218
 219     /* Date management */
 220     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 221     {
 222         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 223         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 224     }
 225
 226     if( p_block->i_buffer < p_sys->i_raw_size )
 227     {
 228         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 229                   p_block->i_buffer, p_sys->i_raw_size );
 230
 231         block_Release( p_block );
 232         return NULL;
 233     }
 234
 235     if( p_sys->b_packetizer )
 236     {
 237         p_buf = SendFrame( p_dec, p_block );
 238     }
 239     else
 240     {
 241         p_buf = DecodeFrame( p_dec, p_block );
 242     }
 243
 244     /* Date management: 1 frame per packet */
 245     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 246     *pp_block = NULL;
 247
 248     return p_buf;
 249 }
 250
 251 /*****************************************************************************
 252  * FillPicture:
 253  *****************************************************************************/
 254 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 255 {
 256     uint8_t *p_src, *p_dst;
 257     int i_src, i_plane, i_line, i_width;
 258     decoder_sys_t *p_sys = p_dec->p_sys;
 259
 260     p_src = p_block->p_buffer;
 261     i_src = p_block->i_buffer;
 262
 263     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 264     {
 265         p_dst = p_pic->p[i_plane].p_pixels;
 266         i_width = p_pic->p[i_plane].i_pitch;
 267
 268         if( p_sys->b_invert )
 269             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 270
 271         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 272         {
 273             p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
 274             p_src += p_sys->b_invert ? -i_width : i_width;
 275             p_dst += i_width;
 276         }
 277
 278         if( p_sys->b_invert )
 279             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 280     }
 281 }
 282
 283 /*****************************************************************************
 284  * DecodeFrame: decodes a video frame.
 285  *****************************************************************************/
 286 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 287 {
 288     decoder_sys_t *p_sys = p_dec->p_sys;
 289     picture_t *p_pic;
 290
 291     /* Get a new picture */
 292     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 293     if( !p_pic )
 294     {
 295         block_Release( p_block );
 296         return NULL;
 297     }
 298
 299     FillPicture( p_dec, p_block, p_pic );
 300
 301     p_pic->date = p_sys->i_pts;
 302
 303     block_Release( p_block );
 304     return p_pic;
 305 }
 306
 307 /*****************************************************************************
 308  * SendFrame: send a video frame to the stream output.
 309  *****************************************************************************/
 310 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 311 {
 312     decoder_sys_t *p_sys = p_dec->p_sys;
 313
 314     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 315
 316     if( p_sys->b_invert )
 317     {
 318         picture_t pic;
 319         uint8_t *p_tmp, *p_pixels;
 320         int i, j;
 321
 322         /* Fill in picture_t fields */
 323         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 324                           p_dec->fmt_out.video.i_width,
 325                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 326
 327         if( !pic.i_planes )
 328         {
 329             msg_Err( p_dec, "unsupported chroma" );
 330             return p_block;
 331         }
 332
 333         p_tmp = malloc( pic.p[0].i_pitch );
 334         p_pixels = p_block->p_buffer;
 335         for( i = 0; i < pic.i_planes; i++ )
 336         {
 337             int i_pitch = pic.p[i].i_pitch;
 338             uint8_t *p_top = p_pixels;
 339             uint8_t *p_bottom = p_pixels + i_pitch *
 340                 (pic.p[i].i_visible_lines - 1);
 341
 342             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 343             {
 344                 p_dec->p_libvlc->pf_memcpy( p_tmp, p_bottom,
 345                                          pic.p[i].i_visible_pitch  );
 346                 p_dec->p_libvlc->pf_memcpy( p_bottom, p_top,
 347                                          pic.p[i].i_visible_pitch  );
 348                 p_dec->p_libvlc->pf_memcpy( p_top, p_tmp,
 349                                          pic.p[i].i_visible_pitch  );
 350                 p_top += i_pitch;
 351                 p_bottom -= i_pitch;
 352             }
 353
 354             p_pixels += i_pitch * pic.p[i].i_lines;
 355         }
 356         free( p_tmp );
 357     }
 358
 359     return p_block;
 360 }
 361
 362 /*****************************************************************************
 363  * CloseDecoder: decoder destruction
 364  *****************************************************************************/
 365 static void CloseDecoder( vlc_object_t *p_this )
 366 {
 367     decoder_t *p_dec = (decoder_t*)p_this;
 368     free( p_dec->p_sys );
 369 }