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 1.3 2003/09/13 17:42:16 fenrir 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, va_list args )
  54 {
  55     int     i_ret;
  56     double  f, *pf;
  57     int64_t i64, *pi64;
  58
  59     vlc_mutex_lock( &p_input->stream.stream_lock );
  60     switch( i_query )
  61     {
  62         case DEMUX_GET_POSITION:
  63             pf = (double*)va_arg( args, double * );
  64             if( p_input->stream.p_selected_area->i_size <= 0 )
  65             {
  66                 *pf = 0.0;
  67             }
  68             else
  69             {
  70                 *pf = (double)p_input->stream.p_selected_area->i_tell /
  71                       (double)p_input->stream.p_selected_area->i_size;
  72             }
  73             i_ret = VLC_SUCCESS;
  74             break;
  75
  76         case DEMUX_SET_POSITION:
  77             f = (double)va_arg( args, double );
  78             if( p_input->stream.b_seekable && p_input->pf_seek != NULL && f >= 0.0 && f <= 1.0 )
  79             {
  80                 SeekOffset( p_input, (int64_t)(f * (double)p_input->stream.p_selected_area->i_size) );
  81                 i_ret = VLC_SUCCESS;
  82             }
  83             else
  84             {
  85                 i_ret = VLC_EGENERIC;
  86             }
  87             break;
  88
  89         case DEMUX_GET_TIME:
  90             pi64 = (int64_t*)va_arg( args, int64_t * );
  91             if( p_input->stream.i_mux_rate > 0 )
  92             {
  93                 *pi64 = (int64_t)1000000 *
  94                         ( p_input->stream.p_selected_area->i_tell / 50 ) /
  95                         p_input->stream.i_mux_rate;
  96                 i_ret = VLC_SUCCESS;
  97             }
  98             else
  99             {
 100                 *pi64 = 0;
 101                 i_ret = VLC_EGENERIC;
 102             }
 103             break;
 104
 105         case DEMUX_SET_TIME:
 106             i64 = (int64_t)va_arg( args, int64_t );
 107             if( p_input->stream.i_mux_rate > 0 &&
 108                 p_input->stream.b_seekable && p_input->pf_seek != NULL && i64 >= 0 )
 109             {
 110                 SeekOffset( p_input, i64 * 50 *
 111                                      (int64_t)p_input->stream.i_mux_rate /
 112                                      (int64_t)1000000 );
 113                 i_ret = VLC_SUCCESS;
 114             }
 115             else
 116             {
 117                 i_ret = VLC_EGENERIC;
 118             }
 119             break;
 120
 121         case DEMUX_GET_LENGTH:
 122             pi64 = (int64_t*)va_arg( args, int64_t * );
 123             if( p_input->stream.i_mux_rate > 0 )
 124             {
 125                 *pi64 = (int64_t)1000000 *
 126                         ( p_input->stream.p_selected_area->i_size / 50 ) /
 127                         p_input->stream.i_mux_rate;
 128                 i_ret = VLC_SUCCESS;
 129             }
 130             else
 131             {
 132                 *pi64 = 0;
 133                 i_ret = VLC_EGENERIC;
 134             }
 135             break;
 136         case DEMUX_GET_FPS:
 137             i_ret = VLC_EGENERIC;
 138             break;
 139
 140         default:
 141             msg_Err( p_input, "unknown query in demux_vaControlDefault !!!" );
 142             i_ret = VLC_EGENERIC;
 143             break;
 144     }
 145     vlc_mutex_unlock( &p_input->stream.stream_lock );
 146
 147     return i_ret;
 148 }
 149
 150
 151 static void SeekOffset( input_thread_t *p_input, int64_t i_pos )
 152 {
 153     /* Reinitialize buffer manager. */
 154     input_AccessReinit( p_input );
 155
 156     vlc_mutex_unlock( &p_input->stream.stream_lock );
 157     p_input->pf_seek( p_input, i_pos );
 158     vlc_mutex_lock( &p_input->stream.stream_lock );
 159 }