git.sesse.net Git - vlc/blob - src/input/demux.c

   1 /*****************************************************************************
   2  * demux.c
   3  *****************************************************************************
   4  * Copyright (C) 1999-2003 VideoLAN
   5  * $Id: demux.c,v 1.4 2003/10/08 21:01:07 gbazin Exp $
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 #include <stdlib.h>
  25 #include <vlc/vlc.h>
  26 #include <vlc/input.h>
  27
  28 #include "ninput.h"
  29
  30 int demux_vaControl( input_thread_t *p_input, int i_query, va_list args )
  31 {
  32     if( p_input->pf_demux_control )
  33     {
  34         return p_input->pf_demux_control( p_input, i_query, args );
  35     }
  36     return VLC_EGENERIC;
  37 }
  38
  39 int demux_Control( input_thread_t *p_input, int i_query, ...  )
  40 {
  41     va_list args;
  42     int     i_result;
  43
  44     va_start( args, i_query );
  45     i_result = demux_vaControl( p_input, i_query, args );
  46     va_end( args );
  47
  48     return i_result;
  49 }
  50
  51 static void SeekOffset( input_thread_t *p_input, int64_t i_pos );
  52
  53 int demux_vaControlDefault( input_thread_t *p_input, int i_query,
  54                             va_list args )
  55 {
  56     int     i_ret;
  57     double  f, *pf;
  58     int64_t i64, *pi64;
  59
  60     vlc_mutex_lock( &p_input->stream.stream_lock );
  61     switch( i_query )
  62     {
  63         case DEMUX_GET_POSITION:
  64             pf = (double*)va_arg( args, double * );
  65             if( p_input->stream.p_selected_area->i_size <= 0 )
  66             {
  67                 *pf = 0.0;
  68             }
  69             else
  70             {
  71                 *pf = (double)p_input->stream.p_selected_area->i_tell /
  72                       (double)p_input->stream.p_selected_area->i_size;
  73             }
  74             i_ret = VLC_SUCCESS;
  75             break;
  76
  77         case DEMUX_SET_POSITION:
  78             f = (double)va_arg( args, double );
  79             if( p_input->stream.b_seekable && p_input->pf_seek != NULL &&
  80                 f >= 0.0 && f <= 1.0 )
  81             {
  82                 SeekOffset( p_input, (int64_t)(f *
  83                             (double)p_input->stream.p_selected_area->i_size) );
  84                 i_ret = VLC_SUCCESS;
  85             }
  86             else
  87             {
  88                 i_ret = VLC_EGENERIC;
  89             }
  90             break;
  91
  92         case DEMUX_GET_TIME:
  93             pi64 = (int64_t*)va_arg( args, int64_t * );
  94             if( p_input->stream.i_mux_rate > 0 )
  95             {
  96                 *pi64 = (int64_t)1000000 *
  97                         ( p_input->stream.p_selected_area->i_tell / 50 ) /
  98                         p_input->stream.i_mux_rate;
  99                 i_ret = VLC_SUCCESS;
 100             }
 101             else
 102             {
 103                 *pi64 = 0;
 104                 i_ret = VLC_EGENERIC;
 105             }
 106             break;
 107
 108         case DEMUX_SET_TIME:
 109             i64 = (int64_t)va_arg( args, int64_t );
 110             if( p_input->stream.i_mux_rate > 0 &&
 111                 p_input->stream.b_seekable &&
 112                 p_input->pf_seek != NULL && i64 >= 0 )
 113             {
 114                 SeekOffset( p_input, i64 * 50 *
 115                                      (int64_t)p_input->stream.i_mux_rate /
 116                                      (int64_t)1000000 );
 117                 i_ret = VLC_SUCCESS;
 118             }
 119             else
 120             {
 121                 i_ret = VLC_EGENERIC;
 122             }
 123             break;
 124
 125         case DEMUX_GET_LENGTH:
 126             pi64 = (int64_t*)va_arg( args, int64_t * );
 127             if( p_input->stream.i_mux_rate > 0 )
 128             {
 129                 *pi64 = (int64_t)1000000 *
 130                         ( p_input->stream.p_selected_area->i_size / 50 ) /
 131                         p_input->stream.i_mux_rate;
 132                 i_ret = VLC_SUCCESS;
 133             }
 134             else
 135             {
 136                 *pi64 = 0;
 137                 i_ret = VLC_EGENERIC;
 138             }
 139             break;
 140         case DEMUX_GET_FPS:
 141             i_ret = VLC_EGENERIC;
 142             break;
 143
 144         default:
 145             msg_Err( p_input, "unknown query in demux_vaControlDefault !!!" );
 146             i_ret = VLC_EGENERIC;
 147             break;
 148     }
 149     vlc_mutex_unlock( &p_input->stream.stream_lock );
 150
 151     return i_ret;
 152 }
 153
 154 static void SeekOffset( input_thread_t *p_input, int64_t i_pos )
 155 {
 156     /* Reinitialize buffer manager. */
 157     input_AccessReinit( p_input );
 158
 159     vlc_mutex_unlock( &p_input->stream.stream_lock );
 160     p_input->pf_seek( p_input, i_pos );
 161     vlc_mutex_lock( &p_input->stream.stream_lock );
 162 }