modules/misc/stats/decoder.c

   1 /*****************************************************************************
   2  * decoder.c: stats decoder plugin for vlc.
   3  *****************************************************************************
   4  * Copyright (C) 2002-2008 the VideoLAN team
   5  *
   6  * Authors: Samuel Hocevar <sam@zoy.org>
   7  *          Pierre d'Herbemont <pdherbemont@videolan.org>
   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_codec.h>
  33
  34 #include "stats.h"
  35
  36 /*****************************************************************************
  37  * Local prototypes
  38  *****************************************************************************/
  39 static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block );
  40
  41 /*****************************************************************************
  42  * OpenDecoder: Open the decoder
  43  *****************************************************************************/
  44 int OpenDecoder ( vlc_object_t *p_this )
  45 {
  46     decoder_t *p_dec = (decoder_t*)p_this;
  47
  48     msg_Dbg( p_this, "opening stats decoder" );
  49
  50     /* Set callbacks */
  51     p_dec->pf_decode_video = DecodeBlock;
  52     p_dec->pf_decode_audio = NULL;
  53     p_dec->pf_decode_sub = NULL;
  54
  55     /* */
  56     es_format_Init( &p_dec->fmt_out, VIDEO_ES, VLC_CODEC_I420 );
  57     p_dec->fmt_out.video.i_width = 100;
  58     p_dec->fmt_out.video.i_height = 100;
  59     p_dec->fmt_out.video.i_sar_num = 1;
  60     p_dec->fmt_out.video.i_sar_den = 1;
  61
  62     return VLC_SUCCESS;
  63 }
  64
  65 /****************************************************************************
  66  * RunDecoder: the whole thing
  67  ****************************************************************************/
  68 static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
  69 {
  70     block_t *p_block;
  71     picture_t * p_pic = NULL;
  72
  73     if( !pp_block || !*pp_block ) return NULL;
  74     p_block = *pp_block;
  75
  76     p_pic = decoder_NewPicture( p_dec );
  77
  78     if( p_block->i_buffer == kBufferSize )
  79     {
  80         msg_Dbg( p_dec, "got %"PRIu64" ms",
  81                  *(mtime_t *)p_block->p_buffer  / 1000 );
  82         msg_Dbg( p_dec, "got %"PRIu64" ms offset",
  83                  (mdate() - *(mtime_t *)p_block->p_buffer) / 1000 );
  84         *(mtime_t *)(p_pic->p->p_pixels) = *(mtime_t *)p_block->p_buffer;
  85     }
  86     else
  87     {
  88         msg_Dbg( p_dec, "got a packet not from stats demuxer" );
  89         *(mtime_t *)(p_pic->p->p_pixels) = mdate();
  90     }
  91
  92     p_pic->date = p_block->i_pts > VLC_TS_INVALID ?
  93             p_block->i_pts : p_block->i_dts;
  94     p_pic->b_force = true;
  95
  96     block_Release( p_block );
  97     *pp_block = NULL;
  98     return p_pic;
  99 }
 100
 101 /*****************************************************************************
 102  * CloseDecoder: decoder destruction
 103  *****************************************************************************/
 104 void CloseDecoder ( vlc_object_t *p_this )
 105 {
 106     msg_Dbg( p_this, "closing stats decoder" );
 107 }