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 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_plugin.h>
  33 #include <vlc_codec.h>
  34 #include <vlc_vout.h>
  35
  36 /*****************************************************************************
  37  * decoder_sys_t : raw video decoder descriptor
  38  *****************************************************************************/
  39 struct decoder_sys_t
  40 {
  41     /* Module mode */
  42     bool b_packetizer;
  43
  44     /*
  45      * Input properties
  46      */
  47     size_t i_raw_size;
  48     bool b_invert;
  49
  50     /*
  51      * Common properties
  52      */
  53     date_t pts;
  54 };
  55
  56 /****************************************************************************
  57  * Local prototypes
  58  ****************************************************************************/
  59 static int  OpenDecoder   ( vlc_object_t * );
  60 static int  OpenPacketizer( vlc_object_t * );
  61 static void CloseDecoder  ( vlc_object_t * );
  62
  63 static void *DecodeBlock  ( decoder_t *, block_t ** );
  64
  65 static picture_t *DecodeFrame( decoder_t *, block_t * );
  66 static block_t   *SendFrame  ( decoder_t *, block_t * );
  67
  68 /*****************************************************************************
  69  * Module descriptor
  70  *****************************************************************************/
  71 vlc_module_begin ()
  72     set_description( N_("Pseudo raw video decoder") )
  73     set_capability( "decoder", 50 )
  74     set_category( CAT_INPUT )
  75     set_subcategory( SUBCAT_INPUT_VCODEC )
  76     set_callbacks( OpenDecoder, CloseDecoder )
  77
  78     add_submodule ()
  79     set_description( N_("Pseudo raw video packetizer") )
  80     set_capability( "packetizer", 100 )
  81     set_callbacks( OpenPacketizer, CloseDecoder )
  82 vlc_module_end ()
  83
  84 /*****************************************************************************
  85  * OpenDecoder: probe the decoder and return score
  86  *****************************************************************************/
  87 static int OpenDecoder( vlc_object_t *p_this )
  88 {
  89     decoder_t *p_dec = (decoder_t*)p_this;
  90     decoder_sys_t *p_sys;
  91
  92     switch( p_dec->fmt_in.i_codec )
  93     {
  94         /* Planar YUV */
  95         case VLC_FOURCC('I','4','4','4'):
  96         case VLC_FOURCC('I','4','2','2'):
  97         case VLC_FOURCC('I','4','2','0'):
  98         case VLC_FOURCC('Y','V','1','2'):
  99         case VLC_FOURCC('I','Y','U','V'):
 100         case VLC_FOURCC('I','4','1','1'):
 101         case VLC_FOURCC('I','4','1','0'):
 102         case VLC_FOURCC('Y','V','U','9'):
 103         case VLC_FOURCC('Y','4','2','B'):
 104         case VLC_FOURCC('Y','4','1','B'):
 105
 106         /* Packed YUV */
 107         case VLC_FOURCC('Y','U','Y','2'):
 108         case VLC_FOURCC('Y','8','0','0'):
 109         case VLC_FOURCC('U','Y','V','Y'):
 110         case VLC_FOURCC('H','D','Y','C'):
 111
 112         /* RGB */
 113         case VLC_FOURCC('R','V','3','2'):
 114         case VLC_FOURCC('R','V','2','4'):
 115         case VLC_FOURCC('R','V','1','6'):
 116         case VLC_FOURCC('R','V','1','5'):
 117             break;
 118         case VLC_FOURCC('2','V','u','y'):
 119         case VLC_FOURCC('2','v','u','y'):
 120         case VLC_FOURCC('A','V','U','I'):
 121             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 122             break;
 123         case VLC_FOURCC('y','v','1','2'):
 124             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 125             break;
 126
 127         default:
 128             return VLC_EGENERIC;
 129     }
 130
 131     /* Allocate the memory needed to store the decoder's structure */
 132     if( ( p_dec->p_sys = p_sys =
 133           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 134         return VLC_ENOMEM;
 135     /* Misc init */
 136     p_dec->p_sys->b_packetizer = false;
 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 = 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     es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
 155
 156     date_Init( &p_sys->pts, p_dec->fmt_out.video.i_frame_rate,
 157                p_dec->fmt_out.video.i_frame_rate_base );
 158     if( p_dec->fmt_out.video.i_frame_rate == 0 ||
 159         p_dec->fmt_out.video.i_frame_rate_base == 0)
 160     {
 161         msg_Warn( p_dec, "invalid frame rate %d/%d, using 25 fps instead",
 162                   p_dec->fmt_out.video.i_frame_rate,
 163                   p_dec->fmt_out.video.i_frame_rate_base);
 164         date_Init( &p_sys->pts, 25, 1 );
 165     }
 166
 167     /* Find out p_vdec->i_raw_size */
 168     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 169                      p_dec->fmt_in.video.i_width,
 170                      p_dec->fmt_in.video.i_height,
 171                      p_dec->fmt_in.video.i_aspect );
 172     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 173         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 174
 175     if( !p_dec->fmt_in.video.i_aspect )
 176     {
 177         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 178             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 179     }
 180
 181     /* Set callbacks */
 182     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 183         DecodeBlock;
 184     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 185         DecodeBlock;
 186
 187     return VLC_SUCCESS;
 188 }
 189
 190 static int OpenPacketizer( vlc_object_t *p_this )
 191 {
 192     decoder_t *p_dec = (decoder_t*)p_this;
 193
 194     int i_ret = OpenDecoder( p_this );
 195
 196     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = true;
 197
 198     return i_ret;
 199 }
 200
 201 /****************************************************************************
 202  * DecodeBlock: the whole thing
 203  ****************************************************************************
 204  * This function must be fed with complete frames.
 205  ****************************************************************************/
 206 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 207 {
 208     decoder_sys_t *p_sys = p_dec->p_sys;
 209     block_t *p_block;
 210     void *p_buf;
 211
 212     if( !pp_block || !*pp_block ) return NULL;
 213
 214     p_block = *pp_block;
 215
 216
 217     if( !p_block->i_pts && !p_block->i_dts && !date_Get( &p_sys->pts ) )
 218     {
 219         /* We've just started the stream, wait for the first PTS. */
 220         block_Release( p_block );
 221         return NULL;
 222     }
 223
 224     /* Date management: If there is a pts avaliable, use that. */
 225     if( p_block->i_pts )
 226     {
 227         date_Set( &p_sys->pts, p_block->i_pts );
 228     }
 229     else if( p_block->i_dts )
 230     {
 231         /* NB, davidf doesn't quite agree with this in general, it is ok
 232          * for rawvideo since it is in order (ie pts=dts), however, it
 233          * may not be ok for an out-of-order codec, so don't copy this
 234          * without thinking */
 235         date_Set( &p_sys->pts, p_block->i_dts );
 236     }
 237
 238     if( p_block->i_buffer < p_sys->i_raw_size )
 239     {
 240         msg_Warn( p_dec, "invalid frame size (%zu < %zu)",
 241                   p_block->i_buffer, p_sys->i_raw_size );
 242
 243         block_Release( p_block );
 244         return NULL;
 245     }
 246
 247     if( p_sys->b_packetizer )
 248     {
 249         p_buf = SendFrame( p_dec, p_block );
 250     }
 251     else
 252     {
 253         p_buf = DecodeFrame( p_dec, p_block );
 254     }
 255
 256     /* Date management: 1 frame per packet */
 257     date_Increment( &p_sys->pts, 1 );
 258     *pp_block = NULL;
 259
 260     return p_buf;
 261 }
 262
 263 /*****************************************************************************
 264  * FillPicture:
 265  *****************************************************************************/
 266 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 267 {
 268     int i_plane;
 269     decoder_sys_t *p_sys = p_dec->p_sys;
 270     uint8_t *p_src = p_block->p_buffer;
 271
 272     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 273     {
 274         int i_pitch = p_pic->p[i_plane].i_pitch;
 275         int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
 276         int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
 277         uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
 278         uint8_t *p_dst_end = p_dst+i_pitch*i_visible_lines;
 279
 280         if( p_sys->b_invert )
 281             for( p_dst_end -= i_pitch; p_dst <= p_dst_end;
 282                  p_dst_end -= i_pitch, p_src += i_visible_pitch )
 283                 vlc_memcpy( p_dst_end, p_src, i_visible_pitch );
 284         else
 285             for( ; p_dst < p_dst_end;
 286                  p_dst += i_pitch, p_src += i_visible_pitch )
 287                 vlc_memcpy( p_dst, p_src, i_visible_pitch );
 288     }
 289 }
 290
 291 /*****************************************************************************
 292  * DecodeFrame: decodes a video frame.
 293  *****************************************************************************/
 294 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 295 {
 296     decoder_sys_t *p_sys = p_dec->p_sys;
 297     picture_t *p_pic;
 298
 299     /* Get a new picture */
 300     p_pic = decoder_NewPicture( p_dec );
 301     if( !p_pic )
 302     {
 303         block_Release( p_block );
 304         return NULL;
 305     }
 306
 307     FillPicture( p_dec, p_block, p_pic );
 308
 309     p_pic->date = date_Get( &p_sys->pts );
 310     p_pic->b_progressive = true;
 311
 312     block_Release( p_block );
 313     return p_pic;
 314 }
 315
 316 /*****************************************************************************
 317  * SendFrame: send a video frame to the stream output.
 318  *****************************************************************************/
 319 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 320 {
 321     decoder_sys_t *p_sys = p_dec->p_sys;
 322
 323     p_block->i_dts = p_block->i_pts = date_Get( &p_sys->pts );
 324
 325     if( p_sys->b_invert )
 326     {
 327         picture_t pic;
 328         uint8_t *p_tmp, *p_pixels;
 329         int i, j;
 330
 331         /* Fill in picture_t fields */
 332         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 333                           p_dec->fmt_out.video.i_width,
 334                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 335
 336         if( !pic.i_planes )
 337         {
 338             msg_Err( p_dec, "unsupported chroma" );
 339             return p_block;
 340         }
 341
 342         p_tmp = malloc( pic.p[0].i_pitch );
 343         if( !p_tmp )
 344             return p_block;
 345         p_pixels = p_block->p_buffer;
 346         for( i = 0; i < pic.i_planes; i++ )
 347         {
 348             int i_pitch = pic.p[i].i_pitch;
 349             uint8_t *p_top = p_pixels;
 350             uint8_t *p_bottom = p_pixels + i_pitch *
 351                 (pic.p[i].i_visible_lines - 1);
 352
 353             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 354             {
 355                 vlc_memcpy( p_tmp, p_bottom, pic.p[i].i_visible_pitch  );
 356                 vlc_memcpy( p_bottom, p_top, pic.p[i].i_visible_pitch  );
 357                 vlc_memcpy( p_top, p_tmp, pic.p[i].i_visible_pitch  );
 358                 p_top += i_pitch;
 359                 p_bottom -= i_pitch;
 360             }
 361
 362             p_pixels += i_pitch * pic.p[i].i_lines;
 363         }
 364         free( p_tmp );
 365     }
 366
 367     return p_block;
 368 }
 369
 370 /*****************************************************************************
 371  * CloseDecoder: decoder destruction
 372  *****************************************************************************/
 373 static void CloseDecoder( vlc_object_t *p_this )
 374 {
 375     decoder_t *p_dec = (decoder_t*)p_this;
 376     free( p_dec->p_sys );
 377 }