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/decoder.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
 100         /* Packed YUV */
 101         case VLC_FOURCC('Y','U','Y','2'):
 102         case VLC_FOURCC('U','Y','V','Y'):
 103
 104         /* RGB */
 105         case VLC_FOURCC('R','V','3','2'):
 106         case VLC_FOURCC('R','V','2','4'):
 107         case VLC_FOURCC('R','V','1','6'):
 108         case VLC_FOURCC('R','V','1','5'):
 109             break;
 110
 111         case VLC_FOURCC('y','v','1','2'):
 112             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 113             break;
 114
 115         default:
 116             return VLC_EGENERIC;
 117     }
 118
 119     /* Allocate the memory needed to store the decoder's structure */
 120     if( ( p_dec->p_sys = p_sys =
 121           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 122     {
 123         msg_Err( p_dec, "out of memory" );
 124         return VLC_EGENERIC;
 125     }
 126     /* Misc init */
 127     p_dec->p_sys->b_packetizer = VLC_FALSE;
 128     p_sys->i_pts = 0;
 129     p_sys->b_invert = 0;
 130
 131     if( (int)p_dec->fmt_in.video.i_height < 0 )
 132     {
 133         /* Frames are coded from bottom to top */
 134         p_dec->fmt_in.video.i_height =
 135             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 136         p_sys->b_invert = VLC_TRUE;
 137     }
 138
 139     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 140     {
 141         msg_Err( p_dec, "invalid display size %dx%d",
 142                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 143         return VLC_EGENERIC;
 144     }
 145
 146     /* Find out p_vdec->i_raw_size */
 147     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 148                      p_dec->fmt_in.video.i_width,
 149                      p_dec->fmt_in.video.i_height,
 150                      p_dec->fmt_in.video.i_aspect );
 151     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 152         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 153
 154     /* Set output properties */
 155     p_dec->fmt_out.i_cat = VIDEO_ES;
 156     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 157     if( !p_dec->fmt_in.video.i_aspect )
 158     {
 159         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 160             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 161     }
 162     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 163
 164     if( p_dec->fmt_in.video.i_rmask )
 165         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 166     if( p_dec->fmt_in.video.i_gmask )
 167         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 168     if( p_dec->fmt_in.video.i_bmask )
 169         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 170
 171     /* Set callbacks */
 172     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 173         DecodeBlock;
 174     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 175         DecodeBlock;
 176
 177     return VLC_SUCCESS;
 178 }
 179
 180 static int OpenPacketizer( vlc_object_t *p_this )
 181 {
 182     decoder_t *p_dec = (decoder_t*)p_this;
 183
 184     int i_ret = OpenDecoder( p_this );
 185
 186     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 187
 188     return i_ret;
 189 }
 190
 191 /****************************************************************************
 192  * DecodeBlock: the whole thing
 193  ****************************************************************************
 194  * This function must be fed with complete frames.
 195  ****************************************************************************/
 196 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 197 {
 198     decoder_sys_t *p_sys = p_dec->p_sys;
 199     block_t *p_block;
 200     void *p_buf;
 201
 202     if( !pp_block || !*pp_block ) return NULL;
 203
 204     p_block = *pp_block;
 205
 206     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 207     {
 208         /* We've just started the stream, wait for the first PTS. */
 209         block_Release( p_block );
 210         return NULL;
 211     }
 212
 213     /* Date management */
 214     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 215     {
 216         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 217         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 218     }
 219
 220     if( p_block->i_buffer < p_sys->i_raw_size )
 221     {
 222         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 223                   p_block->i_buffer, p_sys->i_raw_size );
 224
 225         block_Release( p_block );
 226         return NULL;
 227     }
 228
 229     if( p_sys->b_packetizer )
 230     {
 231         p_buf = SendFrame( p_dec, p_block );
 232     }
 233     else
 234     {
 235         p_buf = DecodeFrame( p_dec, p_block );
 236     }
 237
 238     /* Date management: 1 frame per packet */
 239     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 240     *pp_block = NULL;
 241
 242     return p_buf;
 243 }
 244
 245 /*****************************************************************************
 246  * FillPicture:
 247  *****************************************************************************/
 248 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 249 {
 250     uint8_t *p_src, *p_dst;
 251     int i_src, i_plane, i_line, i_width;
 252     decoder_sys_t *p_sys = p_dec->p_sys;
 253
 254     p_src = p_block->p_buffer;
 255     i_src = p_block->i_buffer;
 256
 257     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 258     {
 259         p_dst = p_pic->p[i_plane].p_pixels;
 260         i_width = p_pic->p[i_plane].i_visible_pitch;
 261
 262         if( p_sys->b_invert )
 263             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 264
 265         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 266         {
 267             p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
 268             p_src += p_sys->b_invert ? -i_width : i_width;
 269             p_dst += p_pic->p[i_plane].i_pitch;
 270         }
 271
 272         if( p_sys->b_invert )
 273             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 274     }
 275 }
 276
 277 /*****************************************************************************
 278  * DecodeFrame: decodes a video frame.
 279  *****************************************************************************/
 280 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 281 {
 282     decoder_sys_t *p_sys = p_dec->p_sys;
 283     picture_t *p_pic;
 284
 285     /* Get a new picture */
 286     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 287     if( !p_pic )
 288     {
 289         block_Release( p_block );
 290         return NULL;
 291     }
 292
 293     FillPicture( p_dec, p_block, p_pic );
 294
 295     p_pic->date = p_sys->i_pts;
 296
 297     block_Release( p_block );
 298     return p_pic;
 299 }
 300
 301 /*****************************************************************************
 302  * SendFrame: send a video frame to the stream output.
 303  *****************************************************************************/
 304 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 305 {
 306     decoder_sys_t *p_sys = p_dec->p_sys;
 307
 308     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 309
 310     if( p_sys->b_invert )
 311     {
 312         picture_t pic;
 313         uint8_t *p_tmp, *p_pixels;
 314         int i, j;
 315
 316         /* Fill in picture_t fields */
 317         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 318                           p_dec->fmt_out.video.i_width,
 319                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 320
 321         if( !pic.i_planes )
 322         {
 323             msg_Err( p_dec, "unsupported chroma" );
 324             return p_block;
 325         }
 326
 327         p_tmp = malloc( pic.p[0].i_visible_pitch );
 328         p_pixels = p_block->p_buffer;
 329         for( i = 0; i < pic.i_planes; i++ )
 330         {
 331             int i_pitch = pic.p[i].i_visible_pitch;
 332             uint8_t *p_top = p_pixels;
 333             uint8_t *p_bottom = p_pixels + i_pitch *
 334                 (pic.p[i].i_visible_lines - 1);
 335
 336             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 337             {
 338                 p_dec->p_libvlc->pf_memcpy( p_tmp, p_bottom,
 339                                          pic.p[i].i_visible_pitch  );
 340                 p_dec->p_libvlc->pf_memcpy( p_bottom, p_top,
 341                                          pic.p[i].i_visible_pitch  );
 342                 p_dec->p_libvlc->pf_memcpy( p_top, p_tmp,
 343                                          pic.p[i].i_visible_pitch  );
 344                 p_top += i_pitch;
 345                 p_bottom -= i_pitch;
 346             }
 347
 348             p_pixels += i_pitch * pic.p[i].i_lines;
 349         }
 350         free( p_tmp );
 351     }
 352
 353     return p_block;
 354 }
 355
 356 /*****************************************************************************
 357  * CloseDecoder: decoder destruction
 358  *****************************************************************************/
 359 static void CloseDecoder( vlc_object_t *p_this )
 360 {
 361     decoder_t *p_dec = (decoder_t*)p_this;
 362     free( p_dec->p_sys );
 363 }