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         case VLC_FOURCC('H','D','Y','C'):
 106
 107         /* RGB */
 108         case VLC_FOURCC('R','V','3','2'):
 109         case VLC_FOURCC('R','V','2','4'):
 110         case VLC_FOURCC('R','V','1','6'):
 111         case VLC_FOURCC('R','V','1','5'):
 112             break;
 113         case VLC_FOURCC('2','V','u','y'):
 114         case VLC_FOURCC('2','v','u','y'):
 115         case VLC_FOURCC('A','V','U','I'):
 116             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 117             break;
 118         case VLC_FOURCC('y','v','1','2'):
 119             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 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     {
 130         msg_Err( p_dec, "out of memory" );
 131         return VLC_EGENERIC;
 132     }
 133     /* Misc init */
 134     p_dec->p_sys->b_packetizer = VLC_FALSE;
 135     p_sys->i_pts = 0;
 136     p_sys->b_invert = 0;
 137
 138     if( (int)p_dec->fmt_in.video.i_height < 0 )
 139     {
 140         /* Frames are coded from bottom to top */
 141         p_dec->fmt_in.video.i_height =
 142             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 143         p_sys->b_invert = VLC_TRUE;
 144     }
 145
 146     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 147     {
 148         msg_Err( p_dec, "invalid display size %dx%d",
 149                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 150         return VLC_EGENERIC;
 151     }
 152
 153     /* Find out p_vdec->i_raw_size */
 154     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 155                      p_dec->fmt_in.video.i_width,
 156                      p_dec->fmt_in.video.i_height,
 157                      p_dec->fmt_in.video.i_aspect );
 158     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 159         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 160
 161     /* Set output properties */
 162     p_dec->fmt_out.i_cat = VIDEO_ES;
 163     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 164     if( !p_dec->fmt_in.video.i_aspect )
 165     {
 166         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 167             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 168     }
 169     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 170
 171     if( p_dec->fmt_in.video.i_rmask )
 172         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 173     if( p_dec->fmt_in.video.i_gmask )
 174         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 175     if( p_dec->fmt_in.video.i_bmask )
 176         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 177
 178     /* Set callbacks */
 179     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 180         DecodeBlock;
 181     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 182         DecodeBlock;
 183
 184     return VLC_SUCCESS;
 185 }
 186
 187 static int OpenPacketizer( vlc_object_t *p_this )
 188 {
 189     decoder_t *p_dec = (decoder_t*)p_this;
 190
 191     int i_ret = OpenDecoder( p_this );
 192
 193     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 194
 195     return i_ret;
 196 }
 197
 198 /****************************************************************************
 199  * DecodeBlock: the whole thing
 200  ****************************************************************************
 201  * This function must be fed with complete frames.
 202  ****************************************************************************/
 203 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 204 {
 205     decoder_sys_t *p_sys = p_dec->p_sys;
 206     block_t *p_block;
 207     void *p_buf;
 208
 209     if( !pp_block || !*pp_block ) return NULL;
 210
 211     p_block = *pp_block;
 212
 213     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 214     {
 215         /* We've just started the stream, wait for the first PTS. */
 216         block_Release( p_block );
 217         return NULL;
 218     }
 219
 220     /* Date management */
 221     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 222     {
 223         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 224         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 225     }
 226
 227     if( p_block->i_buffer < p_sys->i_raw_size )
 228     {
 229         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 230                   p_block->i_buffer, p_sys->i_raw_size );
 231
 232         block_Release( p_block );
 233         return NULL;
 234     }
 235
 236     if( p_sys->b_packetizer )
 237     {
 238         p_buf = SendFrame( p_dec, p_block );
 239     }
 240     else
 241     {
 242         p_buf = DecodeFrame( p_dec, p_block );
 243     }
 244
 245     /* Date management: 1 frame per packet */
 246     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 247     *pp_block = NULL;
 248
 249     return p_buf;
 250 }
 251
 252 /*****************************************************************************
 253  * FillPicture:
 254  *****************************************************************************/
 255 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 256 {
 257     uint8_t *p_src, *p_dst;
 258     int i_src, i_plane, i_line, i_width;
 259     decoder_sys_t *p_sys = p_dec->p_sys;
 260
 261     p_src = p_block->p_buffer;
 262     i_src = p_block->i_buffer;
 263
 264     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 265     {
 266         p_dst = p_pic->p[i_plane].p_pixels;
 267         i_width = p_pic->p[i_plane].i_pitch;
 268
 269         if( p_sys->b_invert )
 270             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 271
 272         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 273         {
 274             p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
 275             p_src += p_sys->b_invert ? -i_width : i_width;
 276             p_dst += i_width;
 277         }
 278
 279         if( p_sys->b_invert )
 280             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 281     }
 282 }
 283
 284 /*****************************************************************************
 285  * DecodeFrame: decodes a video frame.
 286  *****************************************************************************/
 287 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 288 {
 289     decoder_sys_t *p_sys = p_dec->p_sys;
 290     picture_t *p_pic;
 291
 292     /* Get a new picture */
 293     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 294     if( !p_pic )
 295     {
 296         block_Release( p_block );
 297         return NULL;
 298     }
 299
 300     FillPicture( p_dec, p_block, p_pic );
 301
 302     p_pic->date = p_sys->i_pts;
 303
 304     block_Release( p_block );
 305     return p_pic;
 306 }
 307
 308 /*****************************************************************************
 309  * SendFrame: send a video frame to the stream output.
 310  *****************************************************************************/
 311 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 312 {
 313     decoder_sys_t *p_sys = p_dec->p_sys;
 314
 315     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 316
 317     if( p_sys->b_invert )
 318     {
 319         picture_t pic;
 320         uint8_t *p_tmp, *p_pixels;
 321         int i, j;
 322
 323         /* Fill in picture_t fields */
 324         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 325                           p_dec->fmt_out.video.i_width,
 326                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 327
 328         if( !pic.i_planes )
 329         {
 330             msg_Err( p_dec, "unsupported chroma" );
 331             return p_block;
 332         }
 333
 334         p_tmp = malloc( pic.p[0].i_pitch );
 335         p_pixels = p_block->p_buffer;
 336         for( i = 0; i < pic.i_planes; i++ )
 337         {
 338             int i_pitch = pic.p[i].i_pitch;
 339             uint8_t *p_top = p_pixels;
 340             uint8_t *p_bottom = p_pixels + i_pitch *
 341                 (pic.p[i].i_visible_lines - 1);
 342
 343             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 344             {
 345                 p_dec->p_libvlc->pf_memcpy( p_tmp, p_bottom,
 346                                          pic.p[i].i_visible_pitch  );
 347                 p_dec->p_libvlc->pf_memcpy( p_bottom, p_top,
 348                                          pic.p[i].i_visible_pitch  );
 349                 p_dec->p_libvlc->pf_memcpy( p_top, p_tmp,
 350                                          pic.p[i].i_visible_pitch  );
 351                 p_top += i_pitch;
 352                 p_bottom -= i_pitch;
 353             }
 354
 355             p_pixels += i_pitch * pic.p[i].i_lines;
 356         }
 357         free( p_tmp );
 358     }
 359
 360     return p_block;
 361 }
 362
 363 /*****************************************************************************
 364  * CloseDecoder: decoder destruction
 365  *****************************************************************************/
 366 static void CloseDecoder( vlc_object_t *p_this )
 367 {
 368     decoder_t *p_dec = (decoder_t*)p_this;
 369     free( p_dec->p_sys );
 370 }