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_callbacks( OpenDecoder, CloseDecoder );
  71
  72     add_submodule();
  73     set_description( _("Pseudo raw video packetizer") );
  74     set_capability( "packetizer", 100 );
  75     set_callbacks( OpenPacketizer, CloseDecoder );
  76 vlc_module_end();
  77
  78 /*****************************************************************************
  79  * OpenDecoder: probe the decoder and return score
  80  *****************************************************************************/
  81 static int OpenDecoder( vlc_object_t *p_this )
  82 {
  83     decoder_t *p_dec = (decoder_t*)p_this;
  84     decoder_sys_t *p_sys;
  85
  86     switch( p_dec->fmt_in.i_codec )
  87     {
  88         /* Planar YUV */
  89         case VLC_FOURCC('I','4','4','4'):
  90         case VLC_FOURCC('I','4','2','2'):
  91         case VLC_FOURCC('I','4','2','0'):
  92         case VLC_FOURCC('Y','V','1','2'):
  93         case VLC_FOURCC('I','Y','U','V'):
  94         case VLC_FOURCC('I','4','1','1'):
  95         case VLC_FOURCC('I','4','1','0'):
  96         case VLC_FOURCC('Y','V','U','9'):
  97
  98         /* Packed YUV */
  99         case VLC_FOURCC('Y','U','Y','2'):
 100         case VLC_FOURCC('U','Y','V','Y'):
 101
 102         /* RGB */
 103         case VLC_FOURCC('R','V','3','2'):
 104         case VLC_FOURCC('R','V','2','4'):
 105         case VLC_FOURCC('R','V','1','6'):
 106         case VLC_FOURCC('R','V','1','5'):
 107             break;
 108
 109         default:
 110             return VLC_EGENERIC;
 111     }
 112
 113     /* Allocate the memory needed to store the decoder's structure */
 114     if( ( p_dec->p_sys = p_sys =
 115           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 116     {
 117         msg_Err( p_dec, "out of memory" );
 118         return VLC_EGENERIC;
 119     }
 120     /* Misc init */
 121     p_dec->p_sys->b_packetizer = VLC_FALSE;
 122     p_sys->i_pts = 0;
 123     p_sys->b_invert = 0;
 124
 125     if( (int)p_dec->fmt_in.video.i_height < 0 )
 126     {
 127         /* Frames are coded from bottom to top */
 128         p_dec->fmt_in.video.i_height =
 129             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 130         p_sys->b_invert = VLC_TRUE;
 131     }
 132
 133     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 134     {
 135         msg_Err( p_dec, "invalid display size %dx%d",
 136                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 137         return VLC_EGENERIC;
 138     }
 139
 140     /* Find out p_vdec->i_raw_size */
 141     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 142                      p_dec->fmt_in.video.i_width,
 143                      p_dec->fmt_in.video.i_height,
 144                      p_dec->fmt_in.video.i_aspect );
 145     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 146         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 147
 148     /* Set output properties */
 149     p_dec->fmt_out.i_cat = VIDEO_ES;
 150     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 151     if( !p_dec->fmt_in.video.i_aspect )
 152     {
 153         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 154             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 155     }
 156     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 157
 158     if( p_dec->fmt_in.video.i_rmask )
 159         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 160     if( p_dec->fmt_in.video.i_gmask )
 161         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 162     if( p_dec->fmt_in.video.i_bmask )
 163         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 164
 165     /* Set callbacks */
 166     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 167         DecodeBlock;
 168     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 169         DecodeBlock;
 170
 171     return VLC_SUCCESS;
 172 }
 173
 174 static int OpenPacketizer( vlc_object_t *p_this )
 175 {
 176     decoder_t *p_dec = (decoder_t*)p_this;
 177
 178     int i_ret = OpenDecoder( p_this );
 179
 180     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 181
 182     return i_ret;
 183 }
 184
 185 /****************************************************************************
 186  * DecodeBlock: the whole thing
 187  ****************************************************************************
 188  * This function must be fed with complete frames.
 189  ****************************************************************************/
 190 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 191 {
 192     decoder_sys_t *p_sys = p_dec->p_sys;
 193     block_t *p_block;
 194     void *p_buf;
 195
 196     if( !pp_block || !*pp_block ) return NULL;
 197
 198     p_block = *pp_block;
 199
 200     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 201     {
 202         /* We've just started the stream, wait for the first PTS. */
 203         block_Release( p_block );
 204         return NULL;
 205     }
 206
 207     /* Date management */
 208     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 209     {
 210         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 211         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 212     }
 213
 214     if( p_block->i_buffer < p_sys->i_raw_size )
 215     {
 216         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 217                   p_block->i_buffer, p_sys->i_raw_size );
 218
 219         block_Release( p_block );
 220         return NULL;
 221     }
 222
 223     if( p_sys->b_packetizer )
 224     {
 225         p_buf = SendFrame( p_dec, p_block );
 226     }
 227     else
 228     {
 229         p_buf = DecodeFrame( p_dec, p_block );
 230     }
 231
 232     /* Date management: 1 frame per packet */
 233     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 234     *pp_block = NULL;
 235
 236     return p_buf;
 237 }
 238
 239 /*****************************************************************************
 240  * FillPicture:
 241  *****************************************************************************/
 242 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 243 {
 244     uint8_t *p_src, *p_dst;
 245     int i_src, i_plane, i_line, i_width;
 246     decoder_sys_t *p_sys = p_dec->p_sys;
 247
 248     p_src = p_block->p_buffer;
 249     i_src = p_block->i_buffer;
 250
 251     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 252     {
 253         p_dst = p_pic->p[i_plane].p_pixels;
 254         i_width = p_pic->p[i_plane].i_visible_pitch;
 255
 256         if( p_sys->b_invert )
 257             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 258
 259         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 260         {
 261             p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_width );
 262             p_src += p_sys->b_invert ? -i_width : i_width;
 263             p_dst += p_pic->p[i_plane].i_pitch;
 264         }
 265
 266         if( p_sys->b_invert )
 267             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 268     }
 269 }
 270
 271 /*****************************************************************************
 272  * DecodeFrame: decodes a video frame.
 273  *****************************************************************************/
 274 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 275 {
 276     decoder_sys_t *p_sys = p_dec->p_sys;
 277     picture_t *p_pic;
 278
 279     /* Get a new picture */
 280     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 281     if( !p_pic )
 282     {
 283         block_Release( p_block );
 284         return NULL;
 285     }
 286
 287     FillPicture( p_dec, p_block, p_pic );
 288
 289     p_pic->date = p_sys->i_pts;
 290
 291     block_Release( p_block );
 292     return p_pic;
 293 }
 294
 295 /*****************************************************************************
 296  * SendFrame: send a video frame to the stream output.
 297  *****************************************************************************/
 298 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 299 {
 300     decoder_sys_t *p_sys = p_dec->p_sys;
 301
 302     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 303
 304     if( p_sys->b_invert )
 305     {
 306         picture_t pic;
 307         uint8_t *p_tmp, *p_pixels;
 308         int i, j;
 309
 310         /* Fill in picture_t fields */
 311         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 312                           p_dec->fmt_out.video.i_width,
 313                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 314
 315         if( !pic.i_planes )
 316         {
 317             msg_Err( p_dec, "unsupported chroma" );
 318             return p_block;
 319         }
 320
 321         p_tmp = malloc( pic.p[0].i_visible_pitch );
 322         p_pixels = p_block->p_buffer;
 323         for( i = 0; i < pic.i_planes; i++ )
 324         {
 325             int i_pitch = pic.p[i].i_visible_pitch;
 326             uint8_t *p_top = p_pixels;
 327             uint8_t *p_bottom = p_pixels + i_pitch *
 328                 (pic.p[i].i_visible_lines - 1);
 329
 330             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 331             {
 332                 p_dec->p_vlc->pf_memcpy( p_tmp, p_bottom,
 333                                          pic.p[i].i_visible_pitch  );
 334                 p_dec->p_vlc->pf_memcpy( p_bottom, p_top,
 335                                          pic.p[i].i_visible_pitch  );
 336                 p_dec->p_vlc->pf_memcpy( p_top, p_tmp,
 337                                          pic.p[i].i_visible_pitch  );
 338                 p_top += i_pitch;
 339                 p_bottom -= i_pitch;
 340             }
 341
 342             p_pixels += i_pitch * pic.p[i].i_lines;
 343         }
 344         free( p_tmp );
 345     }
 346
 347     return p_block;
 348 }
 349
 350 /*****************************************************************************
 351  * CloseDecoder: decoder destruction
 352  *****************************************************************************/
 353 static void CloseDecoder( vlc_object_t *p_this )
 354 {
 355     decoder_t *p_dec = (decoder_t*)p_this;
 356     free( p_dec->p_sys );
 357 }