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 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc_codec.h>
  33 #include <vlc_vout.h>
  34
  35 /*****************************************************************************
  36  * decoder_sys_t : raw video decoder descriptor
  37  *****************************************************************************/
  38 struct decoder_sys_t
  39 {
  40     /* Module mode */
  41     vlc_bool_t b_packetizer;
  42
  43     /*
  44      * Input properties
  45      */
  46     int i_raw_size;
  47     vlc_bool_t b_invert;
  48
  49     /*
  50      * Common properties
  51      */
  52     mtime_t i_pts;
  53
  54 };
  55
  56 /****************************************************************************
  57  * Local prototypes
  58  ****************************************************************************/
  59 static int  OpenDecoder   ( vlc_object_t * );
  60 static int  OpenPacketizer( vlc_object_t * );
  61 static void CloseDecoder  ( vlc_object_t * );
  62
  63 static void *DecodeBlock  ( decoder_t *, block_t ** );
  64
  65 static picture_t *DecodeFrame( decoder_t *, block_t * );
  66 static block_t   *SendFrame  ( decoder_t *, block_t * );
  67
  68 /*****************************************************************************
  69  * Module descriptor
  70  *****************************************************************************/
  71 vlc_module_begin();
  72     set_description( _("Pseudo raw video decoder") );
  73     set_capability( "decoder", 50 );
  74     set_category( CAT_INPUT );
  75     set_subcategory( SUBCAT_INPUT_VCODEC );
  76     set_callbacks( OpenDecoder, CloseDecoder );
  77
  78     add_submodule();
  79     set_description( _("Pseudo raw video packetizer") );
  80     set_capability( "packetizer", 100 );
  81     set_callbacks( OpenPacketizer, CloseDecoder );
  82 vlc_module_end();
  83
  84 /*****************************************************************************
  85  * OpenDecoder: probe the decoder and return score
  86  *****************************************************************************/
  87 static int OpenDecoder( vlc_object_t *p_this )
  88 {
  89     decoder_t *p_dec = (decoder_t*)p_this;
  90     decoder_sys_t *p_sys;
  91
  92     switch( p_dec->fmt_in.i_codec )
  93     {
  94         /* Planar YUV */
  95         case VLC_FOURCC('I','4','4','4'):
  96         case VLC_FOURCC('I','4','2','2'):
  97         case VLC_FOURCC('I','4','2','0'):
  98         case VLC_FOURCC('Y','V','1','2'):
  99         case VLC_FOURCC('I','Y','U','V'):
 100         case VLC_FOURCC('I','4','1','1'):
 101         case VLC_FOURCC('I','4','1','0'):
 102         case VLC_FOURCC('Y','V','U','9'):
 103         case VLC_FOURCC('Y','4','2','B'):
 104         case VLC_FOURCC('Y','4','1','B'):
 105
 106         /* Packed YUV */
 107         case VLC_FOURCC('Y','U','Y','2'):
 108         case VLC_FOURCC('Y','8','0','0'):
 109         case VLC_FOURCC('U','Y','V','Y'):
 110         case VLC_FOURCC('H','D','Y','C'):
 111
 112         /* RGB */
 113         case VLC_FOURCC('R','V','3','2'):
 114         case VLC_FOURCC('R','V','2','4'):
 115         case VLC_FOURCC('R','V','1','6'):
 116         case VLC_FOURCC('R','V','1','5'):
 117             break;
 118         case VLC_FOURCC('2','V','u','y'):
 119         case VLC_FOURCC('2','v','u','y'):
 120         case VLC_FOURCC('A','V','U','I'):
 121             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 122             break;
 123         case VLC_FOURCC('y','v','1','2'):
 124             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 125             break;
 126
 127         default:
 128             return VLC_EGENERIC;
 129     }
 130
 131     /* Allocate the memory needed to store the decoder's structure */
 132     if( ( p_dec->p_sys = p_sys =
 133           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 134     {
 135         msg_Err( p_dec, "out of memory" );
 136         return VLC_EGENERIC;
 137     }
 138     /* Misc init */
 139     p_dec->p_sys->b_packetizer = VLC_FALSE;
 140     p_sys->i_pts = 0;
 141     p_sys->b_invert = 0;
 142
 143     if( (int)p_dec->fmt_in.video.i_height < 0 )
 144     {
 145         /* Frames are coded from bottom to top */
 146         p_dec->fmt_in.video.i_height =
 147             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 148         p_sys->b_invert = VLC_TRUE;
 149     }
 150
 151     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 152     {
 153         msg_Err( p_dec, "invalid display size %dx%d",
 154                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 155         return VLC_EGENERIC;
 156     }
 157
 158     /* Find out p_vdec->i_raw_size */
 159     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 160                      p_dec->fmt_in.video.i_width,
 161                      p_dec->fmt_in.video.i_height,
 162                      p_dec->fmt_in.video.i_aspect );
 163     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 164         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 165
 166     /* Set output properties */
 167     p_dec->fmt_out.i_cat = VIDEO_ES;
 168     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 169     if( !p_dec->fmt_in.video.i_aspect )
 170     {
 171         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 172             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 173     }
 174     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 175
 176     if( p_dec->fmt_in.video.i_rmask )
 177         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 178     if( p_dec->fmt_in.video.i_gmask )
 179         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 180     if( p_dec->fmt_in.video.i_bmask )
 181         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 182
 183     /* Set callbacks */
 184     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 185         DecodeBlock;
 186     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 187         DecodeBlock;
 188
 189     return VLC_SUCCESS;
 190 }
 191
 192 static int OpenPacketizer( vlc_object_t *p_this )
 193 {
 194     decoder_t *p_dec = (decoder_t*)p_this;
 195
 196     int i_ret = OpenDecoder( p_this );
 197
 198     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 199
 200     return i_ret;
 201 }
 202
 203 /****************************************************************************
 204  * DecodeBlock: the whole thing
 205  ****************************************************************************
 206  * This function must be fed with complete frames.
 207  ****************************************************************************/
 208 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 209 {
 210     decoder_sys_t *p_sys = p_dec->p_sys;
 211     block_t *p_block;
 212     void *p_buf;
 213
 214     if( !pp_block || !*pp_block ) return NULL;
 215
 216     p_block = *pp_block;
 217
 218     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 219     {
 220         /* We've just started the stream, wait for the first PTS. */
 221         block_Release( p_block );
 222         return NULL;
 223     }
 224
 225     /* Date management */
 226     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 227     {
 228         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 229         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 230     }
 231
 232     if( p_block->i_buffer < p_sys->i_raw_size )
 233     {
 234         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 235                   p_block->i_buffer, p_sys->i_raw_size );
 236
 237         block_Release( p_block );
 238         return NULL;
 239     }
 240
 241     if( p_sys->b_packetizer )
 242     {
 243         p_buf = SendFrame( p_dec, p_block );
 244     }
 245     else
 246     {
 247         p_buf = DecodeFrame( p_dec, p_block );
 248     }
 249
 250     /* Date management: 1 frame per packet */
 251     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 252     *pp_block = NULL;
 253
 254     return p_buf;
 255 }
 256
 257 /*****************************************************************************
 258  * FillPicture:
 259  *****************************************************************************/
 260 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 261 {
 262     uint8_t *p_src, *p_dst;
 263     int i_src, i_plane, i_line, i_width;
 264     decoder_sys_t *p_sys = p_dec->p_sys;
 265
 266     p_src = p_block->p_buffer;
 267     i_src = p_block->i_buffer;
 268
 269     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 270     {
 271         p_dst = p_pic->p[i_plane].p_pixels;
 272         i_width = p_pic->p[i_plane].i_pitch;
 273
 274         if( p_sys->b_invert )
 275             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 276
 277         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 278         {
 279             p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
 280             p_src += p_sys->b_invert ? -i_width : i_width;
 281             p_dst += i_width;
 282         }
 283
 284         if( p_sys->b_invert )
 285             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 286     }
 287 }
 288
 289 /*****************************************************************************
 290  * DecodeFrame: decodes a video frame.
 291  *****************************************************************************/
 292 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 293 {
 294     decoder_sys_t *p_sys = p_dec->p_sys;
 295     picture_t *p_pic;
 296
 297     /* Get a new picture */
 298     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 299     if( !p_pic )
 300     {
 301         block_Release( p_block );
 302         return NULL;
 303     }
 304
 305     FillPicture( p_dec, p_block, p_pic );
 306
 307     p_pic->date = p_sys->i_pts;
 308
 309     block_Release( p_block );
 310     return p_pic;
 311 }
 312
 313 /*****************************************************************************
 314  * SendFrame: send a video frame to the stream output.
 315  *****************************************************************************/
 316 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 317 {
 318     decoder_sys_t *p_sys = p_dec->p_sys;
 319
 320     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 321
 322     if( p_sys->b_invert )
 323     {
 324         picture_t pic;
 325         uint8_t *p_tmp, *p_pixels;
 326         int i, j;
 327
 328         /* Fill in picture_t fields */
 329         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 330                           p_dec->fmt_out.video.i_width,
 331                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 332
 333         if( !pic.i_planes )
 334         {
 335             msg_Err( p_dec, "unsupported chroma" );
 336             return p_block;
 337         }
 338
 339         p_tmp = malloc( pic.p[0].i_pitch );
 340         p_pixels = p_block->p_buffer;
 341         for( i = 0; i < pic.i_planes; i++ )
 342         {
 343             int i_pitch = pic.p[i].i_pitch;
 344             uint8_t *p_top = p_pixels;
 345             uint8_t *p_bottom = p_pixels + i_pitch *
 346                 (pic.p[i].i_visible_lines - 1);
 347
 348             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 349             {
 350                 p_dec->p_libvlc->pf_memcpy( p_tmp, p_bottom,
 351                                          pic.p[i].i_visible_pitch  );
 352                 p_dec->p_libvlc->pf_memcpy( p_bottom, p_top,
 353                                          pic.p[i].i_visible_pitch  );
 354                 p_dec->p_libvlc->pf_memcpy( p_top, p_tmp,
 355                                          pic.p[i].i_visible_pitch  );
 356                 p_top += i_pitch;
 357                 p_bottom -= i_pitch;
 358             }
 359
 360             p_pixels += i_pitch * pic.p[i].i_lines;
 361         }
 362         free( p_tmp );
 363     }
 364
 365     return p_block;
 366 }
 367
 368 /*****************************************************************************
 369  * CloseDecoder: decoder destruction
 370  *****************************************************************************/
 371 static void CloseDecoder( vlc_object_t *p_this )
 372 {
 373     decoder_t *p_dec = (decoder_t*)p_this;
 374     free( p_dec->p_sys );
 375 }