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 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, 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         default:
 112             return VLC_EGENERIC;
 113     }
 114
 115     /* Allocate the memory needed to store the decoder's structure */
 116     if( ( p_dec->p_sys = p_sys =
 117           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 118     {
 119         msg_Err( p_dec, "out of memory" );
 120         return VLC_EGENERIC;
 121     }
 122     /* Misc init */
 123     p_dec->p_sys->b_packetizer = VLC_FALSE;
 124     p_sys->i_pts = 0;
 125     p_sys->b_invert = 0;
 126
 127     if( (int)p_dec->fmt_in.video.i_height < 0 )
 128     {
 129         /* Frames are coded from bottom to top */
 130         p_dec->fmt_in.video.i_height =
 131             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 132         p_sys->b_invert = VLC_TRUE;
 133     }
 134
 135     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 136     {
 137         msg_Err( p_dec, "invalid display size %dx%d",
 138                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 139         return VLC_EGENERIC;
 140     }
 141
 142     /* Find out p_vdec->i_raw_size */
 143     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 144                      p_dec->fmt_in.video.i_width,
 145                      p_dec->fmt_in.video.i_height,
 146                      p_dec->fmt_in.video.i_aspect );
 147     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 148         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 149
 150     /* Set output properties */
 151     p_dec->fmt_out.i_cat = VIDEO_ES;
 152     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 153     if( !p_dec->fmt_in.video.i_aspect )
 154     {
 155         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 156             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 157     }
 158     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 159
 160     if( p_dec->fmt_in.video.i_rmask )
 161         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 162     if( p_dec->fmt_in.video.i_gmask )
 163         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 164     if( p_dec->fmt_in.video.i_bmask )
 165         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 166
 167     /* Set callbacks */
 168     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 169         DecodeBlock;
 170     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 171         DecodeBlock;
 172
 173     return VLC_SUCCESS;
 174 }
 175
 176 static int OpenPacketizer( vlc_object_t *p_this )
 177 {
 178     decoder_t *p_dec = (decoder_t*)p_this;
 179
 180     int i_ret = OpenDecoder( p_this );
 181
 182     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 183
 184     return i_ret;
 185 }
 186
 187 /****************************************************************************
 188  * DecodeBlock: the whole thing
 189  ****************************************************************************
 190  * This function must be fed with complete frames.
 191  ****************************************************************************/
 192 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 193 {
 194     decoder_sys_t *p_sys = p_dec->p_sys;
 195     block_t *p_block;
 196     void *p_buf;
 197
 198     if( !pp_block || !*pp_block ) return NULL;
 199
 200     p_block = *pp_block;
 201
 202     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 203     {
 204         /* We've just started the stream, wait for the first PTS. */
 205         block_Release( p_block );
 206         return NULL;
 207     }
 208
 209     /* Date management */
 210     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 211     {
 212         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 213         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 214     }
 215
 216     if( p_block->i_buffer < p_sys->i_raw_size )
 217     {
 218         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 219                   p_block->i_buffer, p_sys->i_raw_size );
 220
 221         block_Release( p_block );
 222         return NULL;
 223     }
 224
 225     if( p_sys->b_packetizer )
 226     {
 227         p_buf = SendFrame( p_dec, p_block );
 228     }
 229     else
 230     {
 231         p_buf = DecodeFrame( p_dec, p_block );
 232     }
 233
 234     /* Date management: 1 frame per packet */
 235     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 236     *pp_block = NULL;
 237
 238     return p_buf;
 239 }
 240
 241 /*****************************************************************************
 242  * FillPicture:
 243  *****************************************************************************/
 244 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 245 {
 246     uint8_t *p_src, *p_dst;
 247     int i_src, i_plane, i_line, i_width;
 248     decoder_sys_t *p_sys = p_dec->p_sys;
 249
 250     p_src = p_block->p_buffer;
 251     i_src = p_block->i_buffer;
 252
 253     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 254     {
 255         p_dst = p_pic->p[i_plane].p_pixels;
 256         i_width = p_pic->p[i_plane].i_visible_pitch;
 257
 258         if( p_sys->b_invert )
 259             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 260
 261         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 262         {
 263             p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_width );
 264             p_src += p_sys->b_invert ? -i_width : i_width;
 265             p_dst += p_pic->p[i_plane].i_pitch;
 266         }
 267
 268         if( p_sys->b_invert )
 269             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 270     }
 271 }
 272
 273 /*****************************************************************************
 274  * DecodeFrame: decodes a video frame.
 275  *****************************************************************************/
 276 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 277 {
 278     decoder_sys_t *p_sys = p_dec->p_sys;
 279     picture_t *p_pic;
 280
 281     /* Get a new picture */
 282     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 283     if( !p_pic )
 284     {
 285         block_Release( p_block );
 286         return NULL;
 287     }
 288
 289     FillPicture( p_dec, p_block, p_pic );
 290
 291     p_pic->date = p_sys->i_pts;
 292
 293     block_Release( p_block );
 294     return p_pic;
 295 }
 296
 297 /*****************************************************************************
 298  * SendFrame: send a video frame to the stream output.
 299  *****************************************************************************/
 300 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 301 {
 302     decoder_sys_t *p_sys = p_dec->p_sys;
 303
 304     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 305
 306     if( p_sys->b_invert )
 307     {
 308         picture_t pic;
 309         uint8_t *p_tmp, *p_pixels;
 310         int i, j;
 311
 312         /* Fill in picture_t fields */
 313         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 314                           p_dec->fmt_out.video.i_width,
 315                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 316
 317         if( !pic.i_planes )
 318         {
 319             msg_Err( p_dec, "unsupported chroma" );
 320             return p_block;
 321         }
 322
 323         p_tmp = malloc( pic.p[0].i_visible_pitch );
 324         p_pixels = p_block->p_buffer;
 325         for( i = 0; i < pic.i_planes; i++ )
 326         {
 327             int i_pitch = pic.p[i].i_visible_pitch;
 328             uint8_t *p_top = p_pixels;
 329             uint8_t *p_bottom = p_pixels + i_pitch *
 330                 (pic.p[i].i_visible_lines - 1);
 331
 332             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 333             {
 334                 p_dec->p_vlc->pf_memcpy( p_tmp, p_bottom,
 335                                          pic.p[i].i_visible_pitch  );
 336                 p_dec->p_vlc->pf_memcpy( p_bottom, p_top,
 337                                          pic.p[i].i_visible_pitch  );
 338                 p_dec->p_vlc->pf_memcpy( p_top, p_tmp,
 339                                          pic.p[i].i_visible_pitch  );
 340                 p_top += i_pitch;
 341                 p_bottom -= i_pitch;
 342             }
 343
 344             p_pixels += i_pitch * pic.p[i].i_lines;
 345         }
 346         free( p_tmp );
 347     }
 348
 349     return p_block;
 350 }
 351
 352 /*****************************************************************************
 353  * CloseDecoder: decoder destruction
 354  *****************************************************************************/
 355 static void CloseDecoder( vlc_object_t *p_this )
 356 {
 357     decoder_t *p_dec = (decoder_t*)p_this;
 358     free( p_dec->p_sys );
 359 }