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         case VLC_FOURCC('2','v','u','y'):
 112         case VLC_FOURCC('A','V','U','I'):
 113             p_dec->fmt_in.i_codec = VLC_FOURCC('U','Y','V','Y');
 114             break;
 115         case VLC_FOURCC('y','v','1','2'):
 116             p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
 117             break;
 118
 119         default:
 120             return VLC_EGENERIC;
 121     }
 122
 123     /* Allocate the memory needed to store the decoder's structure */
 124     if( ( p_dec->p_sys = p_sys =
 125           (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
 126     {
 127         msg_Err( p_dec, "out of memory" );
 128         return VLC_EGENERIC;
 129     }
 130     /* Misc init */
 131     p_dec->p_sys->b_packetizer = VLC_FALSE;
 132     p_sys->i_pts = 0;
 133     p_sys->b_invert = 0;
 134
 135     if( (int)p_dec->fmt_in.video.i_height < 0 )
 136     {
 137         /* Frames are coded from bottom to top */
 138         p_dec->fmt_in.video.i_height =
 139             (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
 140         p_sys->b_invert = VLC_TRUE;
 141     }
 142
 143     if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
 144     {
 145         msg_Err( p_dec, "invalid display size %dx%d",
 146                  p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
 147         return VLC_EGENERIC;
 148     }
 149
 150     /* Find out p_vdec->i_raw_size */
 151     vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
 152                      p_dec->fmt_in.video.i_width,
 153                      p_dec->fmt_in.video.i_height,
 154                      p_dec->fmt_in.video.i_aspect );
 155     p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
 156         p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
 157
 158     /* Set output properties */
 159     p_dec->fmt_out.i_cat = VIDEO_ES;
 160     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
 161     if( !p_dec->fmt_in.video.i_aspect )
 162     {
 163         p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
 164             p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
 165     }
 166     else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
 167
 168     if( p_dec->fmt_in.video.i_rmask )
 169         p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
 170     if( p_dec->fmt_in.video.i_gmask )
 171         p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
 172     if( p_dec->fmt_in.video.i_bmask )
 173         p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
 174
 175     /* Set callbacks */
 176     p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
 177         DecodeBlock;
 178     p_dec->pf_packetize    = (block_t *(*)(decoder_t *, block_t **))
 179         DecodeBlock;
 180
 181     return VLC_SUCCESS;
 182 }
 183
 184 static int OpenPacketizer( vlc_object_t *p_this )
 185 {
 186     decoder_t *p_dec = (decoder_t*)p_this;
 187
 188     int i_ret = OpenDecoder( p_this );
 189
 190     if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
 191
 192     return i_ret;
 193 }
 194
 195 /****************************************************************************
 196  * DecodeBlock: the whole thing
 197  ****************************************************************************
 198  * This function must be fed with complete frames.
 199  ****************************************************************************/
 200 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
 201 {
 202     decoder_sys_t *p_sys = p_dec->p_sys;
 203     block_t *p_block;
 204     void *p_buf;
 205
 206     if( !pp_block || !*pp_block ) return NULL;
 207
 208     p_block = *pp_block;
 209
 210     if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
 211     {
 212         /* We've just started the stream, wait for the first PTS. */
 213         block_Release( p_block );
 214         return NULL;
 215     }
 216
 217     /* Date management */
 218     if( p_block->i_pts > 0 || p_block->i_dts > 0 )
 219     {
 220         if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
 221         else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
 222     }
 223
 224     if( p_block->i_buffer < p_sys->i_raw_size )
 225     {
 226         msg_Warn( p_dec, "invalid frame size (%d < %d)",
 227                   p_block->i_buffer, p_sys->i_raw_size );
 228
 229         block_Release( p_block );
 230         return NULL;
 231     }
 232
 233     if( p_sys->b_packetizer )
 234     {
 235         p_buf = SendFrame( p_dec, p_block );
 236     }
 237     else
 238     {
 239         p_buf = DecodeFrame( p_dec, p_block );
 240     }
 241
 242     /* Date management: 1 frame per packet */
 243     p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
 244     *pp_block = NULL;
 245
 246     return p_buf;
 247 }
 248
 249 /*****************************************************************************
 250  * FillPicture:
 251  *****************************************************************************/
 252 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
 253 {
 254     uint8_t *p_src, *p_dst;
 255     int i_src, i_plane, i_line, i_width;
 256     decoder_sys_t *p_sys = p_dec->p_sys;
 257
 258     p_src = p_block->p_buffer;
 259     i_src = p_block->i_buffer;
 260
 261     for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
 262     {
 263         p_dst = p_pic->p[i_plane].p_pixels;
 264         i_width = p_pic->p[i_plane].i_pitch;
 265
 266         if( p_sys->b_invert )
 267             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
 268
 269         for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
 270         {
 271             p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
 272             p_src += p_sys->b_invert ? -i_width : i_width;
 273             p_dst += i_width;
 274         }
 275
 276         if( p_sys->b_invert )
 277             p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
 278     }
 279 }
 280
 281 /*****************************************************************************
 282  * DecodeFrame: decodes a video frame.
 283  *****************************************************************************/
 284 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
 285 {
 286     decoder_sys_t *p_sys = p_dec->p_sys;
 287     picture_t *p_pic;
 288
 289     /* Get a new picture */
 290     p_pic = p_dec->pf_vout_buffer_new( p_dec );
 291     if( !p_pic )
 292     {
 293         block_Release( p_block );
 294         return NULL;
 295     }
 296
 297     FillPicture( p_dec, p_block, p_pic );
 298
 299     p_pic->date = p_sys->i_pts;
 300
 301     block_Release( p_block );
 302     return p_pic;
 303 }
 304
 305 /*****************************************************************************
 306  * SendFrame: send a video frame to the stream output.
 307  *****************************************************************************/
 308 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
 309 {
 310     decoder_sys_t *p_sys = p_dec->p_sys;
 311
 312     p_block->i_dts = p_block->i_pts = p_sys->i_pts;
 313
 314     if( p_sys->b_invert )
 315     {
 316         picture_t pic;
 317         uint8_t *p_tmp, *p_pixels;
 318         int i, j;
 319
 320         /* Fill in picture_t fields */
 321         vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
 322                           p_dec->fmt_out.video.i_width,
 323                           p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
 324
 325         if( !pic.i_planes )
 326         {
 327             msg_Err( p_dec, "unsupported chroma" );
 328             return p_block;
 329         }
 330
 331         p_tmp = malloc( pic.p[0].i_pitch );
 332         p_pixels = p_block->p_buffer;
 333         for( i = 0; i < pic.i_planes; i++ )
 334         {
 335             int i_pitch = pic.p[i].i_pitch;
 336             uint8_t *p_top = p_pixels;
 337             uint8_t *p_bottom = p_pixels + i_pitch *
 338                 (pic.p[i].i_visible_lines - 1);
 339
 340             for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
 341             {
 342                 p_dec->p_libvlc->pf_memcpy( p_tmp, p_bottom,
 343                                          pic.p[i].i_visible_pitch  );
 344                 p_dec->p_libvlc->pf_memcpy( p_bottom, p_top,
 345                                          pic.p[i].i_visible_pitch  );
 346                 p_dec->p_libvlc->pf_memcpy( p_top, p_tmp,
 347                                          pic.p[i].i_visible_pitch  );
 348                 p_top += i_pitch;
 349                 p_bottom -= i_pitch;
 350             }
 351
 352             p_pixels += i_pitch * pic.p[i].i_lines;
 353         }
 354         free( p_tmp );
 355     }
 356
 357     return p_block;
 358 }
 359
 360 /*****************************************************************************
 361  * CloseDecoder: decoder destruction
 362  *****************************************************************************/
 363 static void CloseDecoder( vlc_object_t *p_this )
 364 {
 365     decoder_t *p_dec = (decoder_t*)p_this;
 366     free( p_dec->p_sys );
 367 }