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
  35 /*****************************************************************************
  36  * decoder_sys_t : raw video decoder descriptor
  37  *****************************************************************************/
  38 struct decoder_sys_t
  39 {
  40     /* Module mode */
  41     bool b_packetizer;
  42
  43     /*
  44      * Input properties
  45      */
  46     size_t i_raw_size;
  47     bool b_invert;
  48
  49     /*
  50      * Common properties
  51      */
  52     date_t pts;
  53 };
  54
  55 /****************************************************************************
  56  * Local prototypes
  57  ****************************************************************************/
  58 static int  OpenDecoder   ( vlc_object_t * );
  59 static int  OpenPacketizer( vlc_object_t * );
  60 static void CloseDecoder  ( vlc_object_t * );
  61
  62 static void *DecodeBlock  ( decoder_t *, block_t ** );
  63
  64 static picture_t *DecodeFrame( decoder_t *, block_t * );
  65 static block_t   *SendFrame  ( decoder_t *, block_t * );
  66
  67 /*****************************************************************************
  68  * Module descriptor
  69  *****************************************************************************/
  70 vlc_module_begin ()
  71     set_description( N_("Pseudo raw video decoder") )
  72     set_capability( "decoder", 50 )
  73     set_category( CAT_INPUT )
  74     set_subcategory( SUBCAT_INPUT_VCODEC )
  75     set_callbacks( OpenDecoder, CloseDecoder )
  76
  77     add_submodule ()
  78     set_description( N_("Pseudo raw video packetizer") )
  79     set_capability( "packetizer", 100 )
  80     set_callbacks( OpenPacketizer, CloseDecoder )
  81 vlc_module_end ()
  82
  83 /*****************************************************************************
  84  * OpenDecoder: probe the decoder and return score
  85  *****************************************************************************/
  86 static int OpenDecoder( vlc_object_t *p_this )
  87 {
  88     decoder_t *p_dec = (decoder_t*)p_this;
  89     decoder_sys_t *p_sys;
  90
  91     switch( p_dec->fmt_in.i_codec )
  92     {
  93         /* Planar YUV */
  94         case VLC_CODEC_I444:
  95         case VLC_CODEC_J444:
  96         case VLC_CODEC_I422:
  97         case VLC_CODEC_J422:
  98         case VLC_CODEC_I420:
  99         case VLC_CODEC_J420:
 100         case VLC_CODEC_YV12:
 101         case VLC_CODEC_YV9:
 102         case VLC_CODEC_I411:
 103         case VLC_CODEC_I410:
 104         case VLC_CODEC_GREY:
 105         case VLC_CODEC_YUVP:
 106
 107         /* Packed YUV */
 108         case VLC_CODEC_YUYV:
 109         case VLC_CODEC_YVYU:
 110         case VLC_CODEC_UYVY:
 111         case VLC_CODEC_VYUY:
 112
 113         /* RGB */
 114         case VLC_CODEC_RGB32:
 115         case VLC_CODEC_RGB24:
 116         case VLC_CODEC_RGB16:
 117         case VLC_CODEC_RGB15:
 118         case VLC_CODEC_RGB8:
 119         case VLC_CODEC_RGBP:
 120             break;
 121
 122         default:
 123             return VLC_EGENERIC;
 124     }
 125
 126     /* Allocate the memory needed to store the decoder's structure */
 127     if( ( p_dec->p_sys = p_sys =
 128           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 129         return VLC_ENOMEM;
 130     /* Misc init */
 131     p_dec->p_sys->b_packetizer = false;
 132     p_sys->b_invert = 0;
 133
 134     if( (int)p_dec->fmt_in.video.i_height < 0 )
 135     {
 136         /* Frames are coded from bottom to top */
 137         p_dec->fmt_in.video.i_height =
 138             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 139         p_sys->b_invert = true;
 140     }
 141
 142     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 143     {
 144         msg_Err( p_dec, "invalid display size %dx%d",
 145                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 146         return VLC_EGENERIC;
 147     }
 148
 149     es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
 150
 151     date_Init( &p_sys->pts, p_dec->fmt_out.video.i_frame_rate,
 152                p_dec->fmt_out.video.i_frame_rate_base );
 153     if( p_dec->fmt_out.video.i_frame_rate == 0 ||
 154         p_dec->fmt_out.video.i_frame_rate_base == 0)
 155     {
 156         msg_Warn( p_dec, "invalid frame rate %d/%d, using 25 fps instead",
 157                   p_dec->fmt_out.video.i_frame_rate,
 158                   p_dec->fmt_out.video.i_frame_rate_base);
 159         date_Init( &p_sys->pts, 25, 1 );
 160     }
 161
 162     /* Find out p_vdec->i_raw_size */
 163     video_format_Setup( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 164                         p_dec->fmt_in.video.i_width,
 165                         p_dec->fmt_in.video.i_height,
 166                         p_dec->fmt_in.video.i_sar_num,
 167                         p_dec->fmt_in.video.i_sar_den );
 168     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 169         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 170
 171     if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
 172     {
 173         p_dec->fmt_out.video.i_sar_num = 1;
 174         p_dec->fmt_out.video.i_sar_den = 1;
 175     }
 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 = 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
 213     if( p_block->i_pts <= VLC_TS_INVALID && p_block->i_dts <= VLC_TS_INVALID &&
 214         !date_Get( &p_sys->pts ) )
 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: If there is a pts avaliable, use that. */
 222     if( p_block->i_pts > VLC_TS_INVALID )
 223     {
 224         date_Set( &p_sys->pts, p_block->i_pts );
 225     }
 226     else if( p_block->i_dts > VLC_TS_INVALID )
 227     {
 228         /* NB, davidf doesn't quite agree with this in general, it is ok
 229          * for rawvideo since it is in order (ie pts=dts), however, it
 230          * may not be ok for an out-of-order codec, so don't copy this
 231          * without thinking */
 232         date_Set( &p_sys->pts, p_block->i_dts );
 233     }
 234
 235     if( p_block->i_buffer < p_sys->i_raw_size )
 236     {
 237         msg_Warn( p_dec, "invalid frame size (%zu < %zu)",
 238                   p_block->i_buffer, p_sys->i_raw_size );
 239
 240         block_Release( p_block );
 241         return NULL;
 242     }
 243
 244     if( p_sys->b_packetizer )
 245     {
 246         p_buf = SendFrame( p_dec, p_block );
 247     }
 248     else
 249     {
 250         p_buf = DecodeFrame( p_dec, p_block );
 251     }
 252
 253     /* Date management: 1 frame per packet */
 254     date_Increment( &p_sys->pts, 1 );
 255     *pp_block = NULL;
 256
 257     return p_buf;
 258 }
 259
 260 /*****************************************************************************
 261  * FillPicture:
 262  *****************************************************************************/
 263 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 264 {
 265     int i_plane;
 266     decoder_sys_t *p_sys = p_dec->p_sys;
 267     uint8_t *p_src = p_block->p_buffer;
 268
 269     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 270     {
 271         int i_pitch = p_pic->p[i_plane].i_pitch;
 272         int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
 273         int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
 274         uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
 275         uint8_t *p_dst_end = p_dst+i_pitch*i_visible_lines;
 276
 277         if( p_sys->b_invert )
 278             for( p_dst_end -= i_pitch; p_dst <= p_dst_end;
 279                  p_dst_end -= i_pitch, p_src += i_visible_pitch )
 280                 vlc_memcpy( p_dst_end, p_src, i_visible_pitch );
 281         else
 282             for( ; p_dst < p_dst_end;
 283                  p_dst += i_pitch, p_src += i_visible_pitch )
 284                 vlc_memcpy( p_dst, p_src, i_visible_pitch );
 285     }
 286 }
 287
 288 /*****************************************************************************
 289  * DecodeFrame: decodes a video frame.
 290  *****************************************************************************/
 291 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 292 {
 293     decoder_sys_t *p_sys = p_dec->p_sys;
 294     picture_t *p_pic;
 295
 296     /* Get a new picture */
 297     p_pic = decoder_NewPicture( p_dec );
 298     if( !p_pic )
 299     {
 300         block_Release( p_block );
 301         return NULL;
 302     }
 303
 304     FillPicture( p_dec, p_block, p_pic );
 305
 306     p_pic->date = date_Get( &p_sys->pts );
 307     if( p_block->i_flags & BLOCK_FLAG_INTERLACED_MASK )
 308     {
 309         p_pic->b_progressive = false;
 310         p_pic->i_nb_fields = 2;
 311         if( p_block->i_flags & BLOCK_FLAG_TOP_FIELD_FIRST )
 312             p_pic->b_top_field_first = true;
 313         else
 314             p_pic->b_top_field_first = false;
 315     }
 316     else
 317         p_pic->b_progressive = true;
 318
 319     block_Release( p_block );
 320     return p_pic;
 321 }
 322
 323 /*****************************************************************************
 324  * SendFrame: send a video frame to the stream output.
 325  *****************************************************************************/
 326 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 327 {
 328     decoder_sys_t *p_sys = p_dec->p_sys;
 329
 330     p_block->i_dts = p_block->i_pts = date_Get( &p_sys->pts );
 331
 332     if( p_sys->b_invert )
 333     {
 334         picture_t pic;
 335         uint8_t *p_tmp, *p_pixels;
 336         int i, j;
 337
 338         /* Fill in picture_t fields */
 339         picture_Setup( &pic, p_dec->fmt_out.i_codec,
 340                        p_dec->fmt_out.video.i_width,
 341                        p_dec->fmt_out.video.i_height, 0, 1 );
 342
 343         if( !pic.i_planes )
 344         {
 345             msg_Err( p_dec, "unsupported chroma" );
 346             return p_block;
 347         }
 348
 349         p_tmp = malloc( pic.p[0].i_pitch );
 350         if( !p_tmp )
 351             return p_block;
 352         p_pixels = p_block->p_buffer;
 353         for( i = 0; i < pic.i_planes; i++ )
 354         {
 355             int i_pitch = pic.p[i].i_pitch;
 356             uint8_t *p_top = p_pixels;
 357             uint8_t *p_bottom = p_pixels + i_pitch *
 358                 (pic.p[i].i_visible_lines - 1);
 359
 360             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 361             {
 362                 vlc_memcpy( p_tmp, p_bottom, pic.p[i].i_visible_pitch  );
 363                 vlc_memcpy( p_bottom, p_top, pic.p[i].i_visible_pitch  );
 364                 vlc_memcpy( p_top, p_tmp, pic.p[i].i_visible_pitch  );
 365                 p_top += i_pitch;
 366                 p_bottom -= i_pitch;
 367             }
 368
 369             p_pixels += i_pitch * pic.p[i].i_lines;
 370         }
 371         free( p_tmp );
 372     }
 373
 374     return p_block;
 375 }
 376
 377 /*****************************************************************************
 378  * CloseDecoder: decoder destruction
 379  *****************************************************************************/
 380 static void CloseDecoder( vlc_object_t *p_this )
 381 {
 382     decoder_t *p_dec = (decoder_t*)p_this;
 383     free( p_dec->p_sys );
 384 }