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
 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         case VLC_FOURCC('2','V','u','y'):
 111             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 112             break;
 113         case VLC_FOURCC('y','v','1','2'):
 114             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 115             break;
 116
 117         default:
 118             return VLC_EGENERIC;
 119     }
 120
 121     /* Allocate the memory needed to store the decoder's structure */
 122     if( ( p_dec->p_sys = p_sys =
 123           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 124     {
 125         msg_Err( p_dec, "out of memory" );
 126         return VLC_EGENERIC;
 127     }
 128     /* Misc init */
 129     p_dec->p_sys->b_packetizer = VLC_FALSE;
 130     p_sys->i_pts = 0;
 131     p_sys->b_invert = 0;
 132
 133     if( (int)p_dec->fmt_in.video.i_height < 0 )
 134     {
 135         /* Frames are coded from bottom to top */
 136         p_dec->fmt_in.video.i_height =
 137             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 138         p_sys->b_invert = VLC_TRUE;
 139     }
 140
 141     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 142     {
 143         msg_Err( p_dec, "invalid display size %dx%d",
 144                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 145         return VLC_EGENERIC;
 146     }
 147
 148     /* Find out p_vdec->i_raw_size */
 149     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 150                      p_dec->fmt_in.video.i_width,
 151                      p_dec->fmt_in.video.i_height,
 152                      p_dec->fmt_in.video.i_aspect );
 153     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 154         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 155
 156     /* Set output properties */
 157     p_dec->fmt_out.i_cat = VIDEO_ES;
 158     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 159     if( !p_dec->fmt_in.video.i_aspect )
 160     {
 161         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 162             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 163     }
 164     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 165
 166     if( p_dec->fmt_in.video.i_rmask )
 167         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 168     if( p_dec->fmt_in.video.i_gmask )
 169         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 170     if( p_dec->fmt_in.video.i_bmask )
 171         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 172
 173     /* Set callbacks */
 174     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 175         DecodeBlock;
 176     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 177         DecodeBlock;
 178
 179     return VLC_SUCCESS;
 180 }
 181
 182 static int OpenPacketizer( vlc_object_t *p_this )
 183 {
 184     decoder_t *p_dec = (decoder_t*)p_this;
 185
 186     int i_ret = OpenDecoder( p_this );
 187
 188     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 189
 190     return i_ret;
 191 }
 192
 193 /****************************************************************************
 194  * DecodeBlock: the whole thing
 195  ****************************************************************************
 196  * This function must be fed with complete frames.
 197  ****************************************************************************/
 198 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 199 {
 200     decoder_sys_t *p_sys = p_dec->p_sys;
 201     block_t *p_block;
 202     void *p_buf;
 203
 204     if( !pp_block || !*pp_block ) return NULL;
 205
 206     p_block = *pp_block;
 207
 208     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 209     {
 210         /* We've just started the stream, wait for the first PTS. */
 211         block_Release( p_block );
 212         return NULL;
 213     }
 214
 215     /* Date management */
 216     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 217     {
 218         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 219         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 220     }
 221
 222     if( p_block->i_buffer < p_sys->i_raw_size )
 223     {
 224         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 225                   p_block->i_buffer, p_sys->i_raw_size );
 226
 227         block_Release( p_block );
 228         return NULL;
 229     }
 230
 231     if( p_sys->b_packetizer )
 232     {
 233         p_buf = SendFrame( p_dec, p_block );
 234     }
 235     else
 236     {
 237         p_buf = DecodeFrame( p_dec, p_block );
 238     }
 239
 240     /* Date management: 1 frame per packet */
 241     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 242     *pp_block = NULL;
 243
 244     return p_buf;
 245 }
 246
 247 /*****************************************************************************
 248  * FillPicture:
 249  *****************************************************************************/
 250 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 251 {
 252     uint8_t *p_src, *p_dst;
 253     int i_src, i_plane, i_line, i_width;
 254     decoder_sys_t *p_sys = p_dec->p_sys;
 255
 256     p_src = p_block->p_buffer;
 257     i_src = p_block->i_buffer;
 258
 259     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 260     {
 261         p_dst = p_pic->p[i_plane].p_pixels;
 262         i_width = p_pic->p[i_plane].i_pitch;
 263
 264         if( p_sys->b_invert )
 265             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 266
 267         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 268         {
 269             p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
 270             p_src += p_sys->b_invert ? -i_width : i_width;
 271             p_dst += i_width;
 272         }
 273
 274         if( p_sys->b_invert )
 275             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 276     }
 277 }
 278
 279 /*****************************************************************************
 280  * DecodeFrame: decodes a video frame.
 281  *****************************************************************************/
 282 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 283 {
 284     decoder_sys_t *p_sys = p_dec->p_sys;
 285     picture_t *p_pic;
 286
 287     /* Get a new picture */
 288     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 289     if( !p_pic )
 290     {
 291         block_Release( p_block );
 292         return NULL;
 293     }
 294
 295     FillPicture( p_dec, p_block, p_pic );
 296
 297     p_pic->date = p_sys->i_pts;
 298
 299     block_Release( p_block );
 300     return p_pic;
 301 }
 302
 303 /*****************************************************************************
 304  * SendFrame: send a video frame to the stream output.
 305  *****************************************************************************/
 306 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 307 {
 308     decoder_sys_t *p_sys = p_dec->p_sys;
 309
 310     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 311
 312     if( p_sys->b_invert )
 313     {
 314         picture_t pic;
 315         uint8_t *p_tmp, *p_pixels;
 316         int i, j;
 317
 318         /* Fill in picture_t fields */
 319         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 320                           p_dec->fmt_out.video.i_width,
 321                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 322
 323         if( !pic.i_planes )
 324         {
 325             msg_Err( p_dec, "unsupported chroma" );
 326             return p_block;
 327         }
 328
 329         p_tmp = malloc( pic.p[0].i_pitch );
 330         p_pixels = p_block->p_buffer;
 331         for( i = 0; i < pic.i_planes; i++ )
 332         {
 333             int i_pitch = pic.p[i].i_pitch;
 334             uint8_t *p_top = p_pixels;
 335             uint8_t *p_bottom = p_pixels + i_pitch *
 336                 (pic.p[i].i_visible_lines - 1);
 337
 338             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 339             {
 340                 p_dec->p_libvlc->pf_memcpy( p_tmp, p_bottom,
 341                                          pic.p[i].i_visible_pitch  );
 342                 p_dec->p_libvlc->pf_memcpy( p_bottom, p_top,
 343                                          pic.p[i].i_visible_pitch  );
 344                 p_dec->p_libvlc->pf_memcpy( p_top, p_tmp,
 345                                          pic.p[i].i_visible_pitch  );
 346                 p_top += i_pitch;
 347                 p_bottom -= i_pitch;
 348             }
 349
 350             p_pixels += i_pitch * pic.p[i].i_lines;
 351         }
 352         free( p_tmp );
 353     }
 354
 355     return p_block;
 356 }
 357
 358 /*****************************************************************************
 359  * CloseDecoder: decoder destruction
 360  *****************************************************************************/
 361 static void CloseDecoder( vlc_object_t *p_this )
 362 {
 363     decoder_t *p_dec = (decoder_t*)p_this;
 364     free( p_dec->p_sys );
 365 }