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_common.h>
  32 #include <vlc_plugin.h>
  33 #include <vlc_codec.h>
  34 #include <vlc_vout.h>
  35
  36 /*****************************************************************************
  37  * decoder_sys_t : raw video decoder descriptor
  38  *****************************************************************************/
  39 struct decoder_sys_t
  40 {
  41     /* Module mode */
  42     bool b_packetizer;
  43
  44     /*
  45      * Input properties
  46      */
  47     size_t i_raw_size;
  48     bool b_invert;
  49
  50     /*
  51      * Common properties
  52      */
  53     mtime_t i_pts;
  54
  55 };
  56
  57 /****************************************************************************
  58  * Local prototypes
  59  ****************************************************************************/
  60 static int  OpenDecoder   ( vlc_object_t * );
  61 static int  OpenPacketizer( vlc_object_t * );
  62 static void CloseDecoder  ( vlc_object_t * );
  63
  64 static void *DecodeBlock  ( decoder_t *, block_t ** );
  65
  66 static picture_t *DecodeFrame( decoder_t *, block_t * );
  67 static block_t   *SendFrame  ( decoder_t *, block_t * );
  68
  69 /*****************************************************************************
  70  * Module descriptor
  71  *****************************************************************************/
  72 vlc_module_begin ()
  73     set_description( N_("Pseudo raw video decoder") )
  74     set_capability( "decoder", 50 )
  75     set_category( CAT_INPUT )
  76     set_subcategory( SUBCAT_INPUT_VCODEC )
  77     set_callbacks( OpenDecoder, CloseDecoder )
  78
  79     add_submodule ()
  80     set_description( N_("Pseudo raw video packetizer") )
  81     set_capability( "packetizer", 100 )
  82     set_callbacks( OpenPacketizer, CloseDecoder )
  83 vlc_module_end ()
  84
  85 /*****************************************************************************
  86  * OpenDecoder: probe the decoder and return score
  87  *****************************************************************************/
  88 static int OpenDecoder( vlc_object_t *p_this )
  89 {
  90     decoder_t *p_dec = (decoder_t*)p_this;
  91     decoder_sys_t *p_sys;
  92
  93     switch( p_dec->fmt_in.i_codec )
  94     {
  95         /* Planar YUV */
  96         case VLC_FOURCC('I','4','4','4'):
  97         case VLC_FOURCC('I','4','2','2'):
  98         case VLC_FOURCC('I','4','2','0'):
  99         case VLC_FOURCC('Y','V','1','2'):
 100         case VLC_FOURCC('I','Y','U','V'):
 101         case VLC_FOURCC('I','4','1','1'):
 102         case VLC_FOURCC('I','4','1','0'):
 103         case VLC_FOURCC('Y','V','U','9'):
 104         case VLC_FOURCC('Y','4','2','B'):
 105         case VLC_FOURCC('Y','4','1','B'):
 106
 107         /* Packed YUV */
 108         case VLC_FOURCC('Y','U','Y','2'):
 109         case VLC_FOURCC('Y','8','0','0'):
 110         case VLC_FOURCC('U','Y','V','Y'):
 111         case VLC_FOURCC('H','D','Y','C'):
 112
 113         /* RGB */
 114         case VLC_FOURCC('R','V','3','2'):
 115         case VLC_FOURCC('R','V','2','4'):
 116         case VLC_FOURCC('R','V','1','6'):
 117         case VLC_FOURCC('R','V','1','5'):
 118             break;
 119         case VLC_FOURCC('2','V','u','y'):
 120         case VLC_FOURCC('2','v','u','y'):
 121         case VLC_FOURCC('A','V','U','I'):
 122             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 123             break;
 124         case VLC_FOURCC('y','v','1','2'):
 125             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 126             break;
 127
 128         default:
 129             return VLC_EGENERIC;
 130     }
 131
 132     /* Allocate the memory needed to store the decoder's structure */
 133     if( ( p_dec->p_sys = p_sys =
 134           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 135         return VLC_ENOMEM;
 136     /* Misc init */
 137     p_dec->p_sys->b_packetizer = false;
 138     p_sys->i_pts = 0;
 139     p_sys->b_invert = 0;
 140
 141     if( (int)p_dec->fmt_in.video.i_height < 0 )
 142     {
 143         /* Frames are coded from bottom to top */
 144         p_dec->fmt_in.video.i_height =
 145             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 146         p_sys->b_invert = true;
 147     }
 148
 149     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 150     {
 151         msg_Err( p_dec, "invalid display size %dx%d",
 152                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 153         return VLC_EGENERIC;
 154     }
 155
 156     /* Find out p_vdec->i_raw_size */
 157     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 158                      p_dec->fmt_in.video.i_width,
 159                      p_dec->fmt_in.video.i_height,
 160                      p_dec->fmt_in.video.i_aspect );
 161     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 162         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 163
 164     /* Set output properties */
 165     p_dec->fmt_out.i_cat = VIDEO_ES;
 166     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 167     if( !p_dec->fmt_in.video.i_aspect )
 168     {
 169         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 170             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 171     }
 172     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 173
 174     if( p_dec->fmt_in.video.i_rmask )
 175         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 176     if( p_dec->fmt_in.video.i_gmask )
 177         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 178     if( p_dec->fmt_in.video.i_bmask )
 179         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 180
 181     /* Set callbacks */
 182     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 183         DecodeBlock;
 184     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 185         DecodeBlock;
 186
 187     return VLC_SUCCESS;
 188 }
 189
 190 static int OpenPacketizer( vlc_object_t *p_this )
 191 {
 192     decoder_t *p_dec = (decoder_t*)p_this;
 193
 194     int i_ret = OpenDecoder( p_this );
 195
 196     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = true;
 197
 198     return i_ret;
 199 }
 200
 201 /****************************************************************************
 202  * DecodeBlock: the whole thing
 203  ****************************************************************************
 204  * This function must be fed with complete frames.
 205  ****************************************************************************/
 206 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 207 {
 208     decoder_sys_t *p_sys = p_dec->p_sys;
 209     block_t *p_block;
 210     void *p_buf;
 211
 212     if( !pp_block || !*pp_block ) return NULL;
 213
 214     p_block = *pp_block;
 215
 216     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 217     {
 218         /* We've just started the stream, wait for the first PTS. */
 219         block_Release( p_block );
 220         return NULL;
 221     }
 222
 223     /* Date management */
 224     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 225     {
 226         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 227         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 228     }
 229
 230     if( p_block->i_buffer < p_sys->i_raw_size )
 231     {
 232         msg_Warn( p_dec, "invalid frame size (%zu < %zu)",
 233                   p_block->i_buffer, p_sys->i_raw_size );
 234
 235         block_Release( p_block );
 236         return NULL;
 237     }
 238
 239     if( p_sys->b_packetizer )
 240     {
 241         p_buf = SendFrame( p_dec, p_block );
 242     }
 243     else
 244     {
 245         p_buf = DecodeFrame( p_dec, p_block );
 246     }
 247
 248     /* Date management: 1 frame per packet */
 249     p_sys->i_pts += ( INT64_C(1000000) * 1.0 / 25 /*FIXME*/ );
 250     *pp_block = NULL;
 251
 252     return p_buf;
 253 }
 254
 255 /*****************************************************************************
 256  * FillPicture:
 257  *****************************************************************************/
 258 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 259 {
 260     int i_plane;
 261     decoder_sys_t *p_sys = p_dec->p_sys;
 262     uint8_t *p_src = p_block->p_buffer;
 263
 264     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 265     {
 266         int i_pitch = p_pic->p[i_plane].i_pitch;
 267         int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
 268         int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
 269         uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
 270         uint8_t *p_dst_end = p_dst+i_pitch*i_visible_lines;
 271
 272         if( p_sys->b_invert )
 273             for( p_dst_end -= i_pitch; p_dst <= p_dst_end;
 274                  p_dst_end -= i_pitch, p_src += i_visible_pitch )
 275                 vlc_memcpy( p_dst_end, p_src, i_visible_pitch );
 276         else
 277             for( ; p_dst < p_dst_end;
 278                  p_dst += i_pitch, p_src += i_visible_pitch )
 279                 vlc_memcpy( p_dst, p_src, i_visible_pitch );
 280     }
 281 }
 282
 283 /*****************************************************************************
 284  * DecodeFrame: decodes a video frame.
 285  *****************************************************************************/
 286 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 287 {
 288     decoder_sys_t *p_sys = p_dec->p_sys;
 289     picture_t *p_pic;
 290
 291     /* Get a new picture */
 292     p_pic = decoder_NewPicture( p_dec );
 293     if( !p_pic )
 294     {
 295         block_Release( p_block );
 296         return NULL;
 297     }
 298
 299     FillPicture( p_dec, p_block, p_pic );
 300
 301     p_pic->date = p_sys->i_pts;
 302
 303     block_Release( p_block );
 304     return p_pic;
 305 }
 306
 307 /*****************************************************************************
 308  * SendFrame: send a video frame to the stream output.
 309  *****************************************************************************/
 310 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 311 {
 312     decoder_sys_t *p_sys = p_dec->p_sys;
 313
 314     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 315
 316     if( p_sys->b_invert )
 317     {
 318         picture_t pic;
 319         uint8_t *p_tmp, *p_pixels;
 320         int i, j;
 321
 322         /* Fill in picture_t fields */
 323         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 324                           p_dec->fmt_out.video.i_width,
 325                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 326
 327         if( !pic.i_planes )
 328         {
 329             msg_Err( p_dec, "unsupported chroma" );
 330             return p_block;
 331         }
 332
 333         p_tmp = malloc( pic.p[0].i_pitch );
 334         if( !p_tmp )
 335             return p_block;
 336         p_pixels = p_block->p_buffer;
 337         for( i = 0; i < pic.i_planes; i++ )
 338         {
 339             int i_pitch = pic.p[i].i_pitch;
 340             uint8_t *p_top = p_pixels;
 341             uint8_t *p_bottom = p_pixels + i_pitch *
 342                 (pic.p[i].i_visible_lines - 1);
 343
 344             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 345             {
 346                 vlc_memcpy( p_tmp, p_bottom, pic.p[i].i_visible_pitch  );
 347                 vlc_memcpy( p_bottom, p_top, pic.p[i].i_visible_pitch  );
 348                 vlc_memcpy( p_top, p_tmp, pic.p[i].i_visible_pitch  );
 349                 p_top += i_pitch;
 350                 p_bottom -= i_pitch;
 351             }
 352
 353             p_pixels += i_pitch * pic.p[i].i_lines;
 354         }
 355         free( p_tmp );
 356     }
 357
 358     return p_block;
 359 }
 360
 361 /*****************************************************************************
 362  * CloseDecoder: decoder destruction
 363  *****************************************************************************/
 364 static void CloseDecoder( vlc_object_t *p_this )
 365 {
 366     decoder_t *p_dec = (decoder_t*)p_this;
 367     free( p_dec->p_sys );
 368 }