input.c

/*****************************************************************************
 * input.c: input thread
 * Read a stream, demultiplex and parse it before sending it to
 * decoders.
 *****************************************************************************
 * Copyright (C) 1998-2004 VideoLAN
 * $Id$
 *
 * Authors: Christophe Massiot <massiot@via.ecp.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>

#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/decoder.h>
#include <vlc/vout.h>

#ifdef HAVE_SYS_TIMES_H
#   include <sys/times.h>
#endif

#include "vlc_playlist.h"

#include "stream_output.h"

#include "vlc_interface.h"
#include "codecs.h"
#include "vlc_meta.h"
#include "../../modules/demux/util/sub.h"

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
struct input_thread_sys_t
{
    /* subtitles */
    int              i_sub;
    subtitle_demux_t **sub;

    int64_t          i_stop_time;
};

static  int RunThread       ( input_thread_t *p_input );
static  int InitThread      ( input_thread_t *p_input );
static void ErrorThread     ( input_thread_t *p_input );
static void EndThread       ( input_thread_t *p_input );

static void ParseOption     ( input_thread_t *p_input,
                              const char *psz_option );

/*****************************************************************************
 * Callbacks
 *****************************************************************************/
static int PositionCallback( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void *p_data );
static int TimeCallback    ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void *p_data );
static int StateCallback   ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void *p_data );
static int RateCallback    ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void *p_data );

/*****************************************************************************
 * input_CreateThread: creates a new input thread
 *****************************************************************************
 * This function creates a new input, and returns a pointer
 * to its description. On error, it returns NULL.
 *****************************************************************************/
input_thread_t *__input_CreateThread( vlc_object_t *p_parent, char *psz_uri,
                                      char **ppsz_options, int i_options )

{
    input_thread_t *    p_input;                        /* thread descriptor */
    vlc_value_t val;
    int i;

    /* Allocate descriptor */
    p_input = vlc_object_create( p_parent, VLC_OBJECT_INPUT );
    if( p_input == NULL )
    {
        msg_Err( p_parent, "out of memory" );
        return NULL;
    }

    /* Parse input options */
    for( i = 0; i < i_options; i++ )
    {
        msg_Dbg( p_input, "option: %s", ppsz_options[i] );
        ParseOption( p_input, ppsz_options[i] );
    }

    /* Create a few object variables we'll need later on */
    var_Create( p_input, "video", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_input, "audio", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_input, "audio-channel", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
    var_Create( p_input, "spu-channel", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
    var_Create( p_input, "sub-file", VLC_VAR_FILE | VLC_VAR_DOINHERIT );
    var_Create( p_input, "sub-autodetect-file", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_input, "sub-autodetect-fuzzy", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );

    var_Create( p_input, "sout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
    var_Create( p_input, "sout-all",   VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_input, "sout-audio", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_input, "sout-video", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_input, "sout-keep",  VLC_VAR_BOOL | VLC_VAR_DOINHERIT );

    /* repeat variable */
    var_Create( p_input, "input-repeat", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );

    /* start/stop time */
    var_Create( p_input, "start-time", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
    var_Create( p_input, "stop-time", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );

    /* decoders */
    var_Create( p_input, "minimize-threads", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );

    /* play status */

    /* position variable */
    var_Create( p_input, "position",  VLC_VAR_FLOAT );  /* position 0.0->1.0 */
    var_Create( p_input, "position-offset",  VLC_VAR_FLOAT );  /* relative */
    val.f_float = 0.0;
    var_Change( p_input, "position", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "position", PositionCallback, NULL );
    var_AddCallback( p_input, "position-offset", PositionCallback, NULL );

    /* time variable */
    var_Create( p_input, "time",  VLC_VAR_TIME );
    var_Create( p_input, "time-offset",  VLC_VAR_TIME );    /* relative */
    val.i_time = 0;
    var_Change( p_input, "time", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "time", TimeCallback, NULL );
    var_AddCallback( p_input, "time-offset", TimeCallback, NULL );

    /* length variable */
    var_Create( p_input, "length",  VLC_VAR_TIME );
    val.i_time = 0;
    var_Change( p_input, "length", VLC_VAR_SETVALUE, &val, NULL );

    /* rate variable */
    var_Create( p_input, "rate", VLC_VAR_INTEGER );
    var_Create( p_input, "rate-slower", VLC_VAR_VOID );
    var_Create( p_input, "rate-faster", VLC_VAR_VOID );
    val.i_int = DEFAULT_RATE;
    var_Change( p_input, "rate", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "rate", RateCallback, NULL );
    var_AddCallback( p_input, "rate-slower", RateCallback, NULL );
    var_AddCallback( p_input, "rate-faster", RateCallback, NULL );

    /* state variable */
    var_Create( p_input, "state", VLC_VAR_INTEGER );
    val.i_int = INIT_S;
    var_Change( p_input, "state", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "state", StateCallback, NULL );

    /* state variable */
    var_Create( p_input, "demuxed-id3", VLC_VAR_BOOL );
    val.b_bool = VLC_FALSE;
    var_Change( p_input, "demuxed-id3", VLC_VAR_SETVALUE, &val, NULL );

    /* Initialize thread properties */
    p_input->b_eof      = 0;
    p_input->p_sys      = NULL;

    /* Set target */
    p_input->psz_source = strdup( psz_uri );

    /* Stream */
    p_input->s = NULL;

    /* es out */
    p_input->p_es_out = NULL;

    /* Demux */
    p_input->p_demux   = NULL;
    p_input->pf_demux  = NULL;
    p_input->pf_rewind = NULL;
    p_input->pf_demux_control = NULL;
    p_input->i_cr_average = config_GetInt( p_input, "cr-average" );

    /* Access */
    p_input->p_access = NULL;

    p_input->i_bufsize = 0;
    p_input->i_mtu = 0;
    p_input->i_pts_delay = DEFAULT_PTS_DELAY;

    /* Initialize statistics */
    p_input->c_loops                    = 0;
    p_input->stream.c_packets_read      = 0;
    p_input->stream.c_packets_trashed   = 0;

    /* Set locks. */
    vlc_mutex_init( p_input, &p_input->stream.stream_lock );
    vlc_cond_init( p_input, &p_input->stream.stream_wait );
    vlc_mutex_init( p_input, &p_input->stream.control.control_lock );

    /* Initialize stream description */
    p_input->stream.b_changed = 0;
    p_input->stream.i_es_number = 0;
    p_input->stream.i_selected_es_number = 0;
    p_input->stream.i_pgrm_number = 0;
    p_input->stream.i_new_status = p_input->stream.i_new_rate = 0;
    p_input->stream.b_new_mute = MUTE_NO_CHANGE;
    p_input->stream.i_mux_rate = 0;
    p_input->stream.b_seekable = 0;
    p_input->stream.p_sout = NULL;

    /* no stream, no program, no area, no es */
    p_input->stream.p_new_program = NULL;

    p_input->stream.i_area_nb = 0;
    p_input->stream.pp_areas = NULL;
    p_input->stream.p_selected_area = NULL;
    p_input->stream.p_new_area = NULL;

    p_input->stream.pp_selected_es = NULL;
    p_input->stream.p_removed_es = NULL;
    p_input->stream.p_newly_selected_es = NULL;

    /* By default there is one area in a stream */
    input_AddArea( p_input, 0, 1 );
    p_input->stream.p_selected_area = p_input->stream.pp_areas[0];

    /* Initialize stream control properties. */
    p_input->stream.control.i_status = INIT_S;
    p_input->stream.control.i_rate = DEFAULT_RATE;
    p_input->stream.control.b_mute = 0;
    p_input->stream.control.b_grayscale = config_GetInt( p_input, "grayscale");

    msg_Info( p_input, "playlist item `%s'", p_input->psz_source );

    /* Initialize input info */
    p_input->stream.p_info = NULL;
    p_input->stream.p_info = input_InfoCategory( p_input, _("General") );
    input_AddInfo( p_input->stream.p_info, _("Playlist Item"),
                   p_input->psz_source );
    vlc_object_attach( p_input, p_parent );

    /* Create thread and wait for its readiness. */
    if( vlc_thread_create( p_input, "input", RunThread,
                           VLC_THREAD_PRIORITY_INPUT, VLC_TRUE ) )
    {
        msg_Err( p_input, "cannot create input thread" );
        input_DelInfo( p_input );
        free( p_input );
        return NULL;
    }

    return p_input;
}

/*****************************************************************************
 * input_StopThread: mark an input thread as zombie
 *****************************************************************************
 * This function should not return until the thread is effectively cancelled.
 *****************************************************************************/
void input_StopThread( input_thread_t *p_input )
{
    /* Make the thread exit from a possible vlc_cond_wait() */
    vlc_mutex_lock( &p_input->stream.stream_lock );
    /* Request thread destruction */
    p_input->b_die = 1;

    vlc_cond_signal( &p_input->stream.stream_wait );
    vlc_mutex_unlock( &p_input->stream.stream_lock );
}

/*****************************************************************************
 * input_DestroyThread: mark an input thread as zombie
 *****************************************************************************
 * This function should not return until the thread is effectively cancelled.
 *****************************************************************************/
void input_DestroyThread( input_thread_t *p_input )
{
    /* Join the thread */
    vlc_thread_join( p_input );

    /* Destroy Mutex locks */
    vlc_mutex_destroy( &p_input->stream.control.control_lock );
    vlc_cond_destroy( &p_input->stream.stream_wait );
    vlc_mutex_destroy( &p_input->stream.stream_lock );
}

/*****************************************************************************
 * RunThread: main thread loop
 *****************************************************************************
 * Thread in charge of processing the network packets and demultiplexing.
 *****************************************************************************/
static int RunThread( input_thread_t *p_input )
{
    vlc_value_t  val;
    mtime_t      i_update_next = -1;

    /* Signal right now, otherwise we'll get stuck in a peek */
    vlc_thread_ready( p_input );

    if( InitThread( p_input ) )
    {
        /* If we failed, wait before we are killed, and exit */
        p_input->b_error = 1;

        ErrorThread( p_input );

        /* Tell we're dead */
        p_input->b_dead = 1;

        input_DelInfo( p_input );

        return 0;
    }

    /* initialization is complete */
    vlc_mutex_lock( &p_input->stream.stream_lock );
    p_input->stream.b_changed        = 1;
    p_input->stream.control.i_status = PLAYING_S;
    vlc_mutex_unlock( &p_input->stream.stream_lock );

    val.i_int = PLAYING_S;
    var_Change( p_input, "state", VLC_VAR_SETVALUE, &val, NULL );

    while( !p_input->b_die && !p_input->b_error && !p_input->b_eof )
    {
        unsigned int i, i_count;

        p_input->c_loops++;

        vlc_mutex_lock( &p_input->stream.stream_lock );

        if( p_input->stream.p_new_program )
        {
            if( p_input->pf_set_program != NULL )
            {

                /* Reinitialize buffer manager. */
                input_AccessReinit( p_input );

                p_input->pf_set_program( p_input,
                                         p_input->stream.p_new_program );

                /* Escape all decoders for the stream discontinuity they
                 * will encounter. */
                input_EscapeDiscontinuity( p_input );

                for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
                {
                    pgrm_descriptor_t * p_pgrm
                                            = p_input->stream.pp_programs[i];

                    /* Reinitialize synchro. */
                    p_pgrm->i_synchro_state = SYNCHRO_REINIT;
                }
            }
            p_input->stream.p_new_program = NULL;
        }

        if( p_input->stream.p_new_area )
        {
            if( p_input->stream.b_seekable && p_input->pf_set_area != NULL )
            {
                input_AccessReinit( p_input );

                p_input->pf_set_area( p_input, p_input->stream.p_new_area );

                /* Escape all decoders for the stream discontinuity they
                 * will encounter. */
                input_EscapeDiscontinuity( p_input );

                for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
                {
                    pgrm_descriptor_t * p_pgrm
                                            = p_input->stream.pp_programs[i];

                    /* Reinitialize synchro. */
                    p_pgrm->i_synchro_state = SYNCHRO_REINIT;
                }
            }
            p_input->stream.p_new_area = NULL;
        }

        if( p_input->stream.p_selected_area->i_seek != NO_SEEK )
        {
            if( p_input->stream.p_selected_area->i_size > 0 )
            {
                unsigned int i;
                mtime_t      i_time;
                double f = (double)p_input->stream.p_selected_area->i_seek /
                           (double)p_input->stream.p_selected_area->i_size;

                vlc_mutex_unlock( &p_input->stream.stream_lock );
                demux_Control( p_input, DEMUX_SET_POSITION, f );
                vlc_mutex_lock( &p_input->stream.stream_lock );

                /* Escape all decoders for the stream discontinuity they
                 * will encounter. */
                input_EscapeDiscontinuity( p_input );

                for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
                {
                    pgrm_descriptor_t * p_pgrm=p_input->stream.pp_programs[i];

                    /* Reinitialize synchro. */
                    p_pgrm->i_synchro_state = SYNCHRO_REINIT;
                }

                vlc_mutex_unlock( &p_input->stream.stream_lock );
                if( !demux_Control( p_input, DEMUX_GET_TIME, &i_time ) )
                {
                    int i;
                    vlc_value_t val;

                    /* Help in bar display */
                    val.i_time = i_time;
                    var_Change( p_input, "time", VLC_VAR_SETVALUE, &val, NULL );

                    /* Seek subs */
                    for( i = 0; i < p_input->p_sys->i_sub; i++ )
                    {
                        subtitle_Seek( p_input->p_sys->sub[i], i_time );
                    }
                }
                vlc_mutex_lock( &p_input->stream.stream_lock );
            }
            p_input->stream.p_selected_area->i_seek = NO_SEEK;
        }

        if( p_input->stream.p_removed_es )
        {
            input_UnselectES( p_input, p_input->stream.p_removed_es );
            p_input->stream.p_removed_es = NULL;
        }

        if( p_input->stream.p_newly_selected_es )
        {
            input_SelectES( p_input, p_input->stream.p_newly_selected_es );
            p_input->stream.p_newly_selected_es = NULL;
        }

        if( p_input->stream.b_new_mute != MUTE_NO_CHANGE )
        {
            if( p_input->stream.b_new_mute )
            {
                input_EscapeAudioDiscontinuity( p_input );
            }

            vlc_mutex_lock( &p_input->stream.control.control_lock );
            p_input->stream.control.b_mute = p_input->stream.b_new_mute;
            vlc_mutex_unlock( &p_input->stream.control.control_lock );

            p_input->stream.b_new_mute = MUTE_NO_CHANGE;
        }

        vlc_mutex_unlock( &p_input->stream.stream_lock );

        /* Read and demultiplex some data. */
        i_count = p_input->pf_demux( p_input );

        if( i_count == 0 )
        {
            vlc_value_t repeat;

            var_Get( p_input, "input-repeat", &repeat );
            if( repeat.i_int == 0 || p_input->stream.i_area_nb <= 0 )
            {
                /* End of file - we do not set b_die because only the
                 * playlist is allowed to do so. */
                msg_Info( p_input, "EOF reached" );
                p_input->b_eof = 1;
            }
            else
            {
                msg_Dbg( p_input, "repeating the same input (%d)", repeat.i_int );
                if( repeat.i_int > 0 )
                {
                    repeat.i_int--;
                    var_Set( p_input, "input-repeat", repeat );
                }

                p_input->stream.p_new_area = p_input->stream.pp_areas[0];
                p_input->stream.p_new_area->i_seek = 0;
            }
        }
        else if( i_count < 0 )
        {
            p_input->b_error = 1;
        }

        if( !p_input->b_error && !p_input->b_eof && i_update_next < mdate() )
        {
            int i;
            mtime_t i_time;
            mtime_t i_length;
            double  d_pos;

            /* update input status variables */
            if( !demux_Control( p_input, DEMUX_GET_POSITION, &d_pos ) )
            {
                val.f_float = (float)d_pos;
                var_Change( p_input, "position", VLC_VAR_SETVALUE, &val, NULL );
            }
            if( !demux_Control( p_input, DEMUX_GET_TIME, &i_time ) )
            {
                val.i_time = i_time;
                var_Change( p_input, "time", VLC_VAR_SETVALUE, &val, NULL );
            }
            if( !demux_Control( p_input, DEMUX_GET_LENGTH, &i_length ) )
            {
                val.i_time = i_length;
                var_Change( p_input, "length", VLC_VAR_SETVALUE, &val, NULL );
            }

            /* Check stop-time */
            if( p_input->p_sys->i_stop_time > 0 && p_input->p_sys->i_stop_time < i_time )
            {
                msg_Warn( p_input, "EOF reached because of stop-time" );
                p_input->b_eof = 1;
            }

            /* update subs */
            for( i = 0; i < p_input->p_sys->i_sub; i++ )
            {
                subtitle_Demux( p_input->p_sys->sub[i], i_time );
            }

            i_update_next = mdate() + I64C(150000);
        }
    }

    if( p_input->b_error || p_input->b_eof )
    {
        ErrorThread( p_input );
    }

    EndThread( p_input );

    return 0;
}

/*****************************************************************************
 * InitThread: init the input Thread
 *****************************************************************************/
static int InitThread( input_thread_t * p_input )
{
    vlc_meta_t *meta;
    float f_fps;
    playlist_t *p_playlist;
    mtime_t i_length;

    /* Parse source string. Syntax : [[<access>][/<demux>]:][<source>] */
    char * psz_parser = p_input->psz_dupsource = strdup(p_input->psz_source);
    vlc_value_t val;
    int64_t i_microsecondperframe;

    subtitle_demux_t *p_sub_toselect = NULL;
    char             *psz_sub_file = NULL;

    /* Skip the plug-in names */
    while( *psz_parser && *psz_parser != ':' )
    {
        psz_parser++;
    }
#if defined( WIN32 ) || defined( UNDER_CE )
    if( psz_parser - p_input->psz_dupsource == 1 )
    {
        msg_Warn( p_input, "drive letter %c: found in source string",
                           p_input->psz_dupsource[0] ) ;
        psz_parser = "";
    }
#endif

    if( !*psz_parser )
    {
        p_input->psz_access = p_input->psz_demux = "";
        p_input->psz_name = p_input->psz_source;
        free( p_input->psz_dupsource );
        p_input->psz_dupsource = NULL;
    }
    else
    {
        *psz_parser++ = '\0';

        /* let's skip '//' */
        if( psz_parser[0] == '/' && psz_parser[1] == '/' )
        {
            psz_parser += 2 ;
        }

        p_input->psz_name = psz_parser ;

        /* Come back to parse the access and demux plug-ins */
        psz_parser = p_input->psz_dupsource;

        if( !*psz_parser )
        {
            /* No access */
            p_input->psz_access = "";
        }
        else if( *psz_parser == '/' )
        {
            /* No access */
            p_input->psz_access = "";
            psz_parser++;
        }
        else
        {
            p_input->psz_access = psz_parser;

            while( *psz_parser && *psz_parser != '/' )
            {
                psz_parser++;
            }

            if( *psz_parser == '/' )
            {
                *psz_parser++ = '\0';
            }
        }

        if( !*psz_parser )
        {
            /* No demux */
            p_input->psz_demux = "";
        }
        else
        {
            p_input->psz_demux = psz_parser;
        }
    }

    msg_Dbg( p_input, "access `%s', demux `%s', name `%s'",
             p_input->psz_access, p_input->psz_demux, p_input->psz_name );

    if( input_AccessInit( p_input ) == -1 )
    {
        free( p_input->psz_source );
        if( p_input->psz_dupsource != NULL )
        {
            free( p_input->psz_dupsource );
        }

        return VLC_EGENERIC;
    }

    /* Initialize optional stream output. (before demuxer)*/
    var_Get( p_input, "sout", &val );
    if( val.psz_string != NULL )
    {
        if ( *val.psz_string && (p_input->stream.p_sout =
             sout_NewInstance( p_input, val.psz_string )) == NULL )
        {
            msg_Err( p_input, "cannot start stream output instance, aborting" );
            free( val.psz_string );

            input_AccessEnd( p_input );
            free( p_input->psz_source );
            if( p_input->psz_dupsource != NULL )
            {
                free( p_input->psz_dupsource );
            }
            return VLC_EGENERIC;
        }
        free( val.psz_string );
    }

    p_input->p_es_out = input_EsOutNew( p_input );
    es_out_Control( p_input->p_es_out, ES_OUT_SET_ACTIVE, VLC_FALSE );
    es_out_Control( p_input->p_es_out, ES_OUT_SET_MODE, ES_OUT_MODE_NONE );

    /* Find and open appropriate access module */
    p_input->p_access = module_Need( p_input, "access",
                                     p_input->psz_access, VLC_TRUE );

#ifndef WIN32      /* Remove this gross hack from the win32 build as colons
                    * are forbidden in filenames on Win32. */

    /* Maybe we got something like: /Volumes/toto:titi/gabu.mpg */
    if ( p_input->p_access == NULL
          && (*p_input->psz_demux || *p_input->psz_access) )
    {
        p_input->psz_access = p_input->psz_demux = "";
        p_input->psz_name = p_input->psz_source;
        free( p_input->psz_dupsource);
        p_input->psz_dupsource = NULL;

        p_input->p_access = module_Need( p_input, "access",
                                         p_input->psz_access, VLC_TRUE );
    }
#endif

    if( p_input->p_access == NULL )
    {
        msg_Err( p_input, "no suitable access module for `%s/%s://%s'",
                 p_input->psz_access, p_input->psz_demux, p_input->psz_name );
        if ( p_input->stream.p_sout != NULL )
        {
            sout_DeleteInstance( p_input->stream.p_sout );
        }

        input_AccessEnd( p_input );
        free( p_input->psz_source );
        if( p_input->psz_dupsource != NULL )
        {
            free( p_input->psz_dupsource );
        }
        input_EsOutDelete( p_input->p_es_out );
        return VLC_EGENERIC;
    }

    /* Waiting for stream. */
    if( p_input->i_mtu )
    {
        p_input->i_bufsize = p_input->i_mtu;
    }
    else
    {
        p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
    }

    /* If the desynchronisation requested by the user is < 0, we need to
     * cache more data. */
    var_Create( p_input, "audio-desync", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_input, "audio-desync", &val );
    if( val.i_int < 0 )
        p_input->i_pts_delay -= (val.i_int * 1000);

    if( p_input->p_current_data == NULL && p_input->pf_read != NULL )
    {
        while( !input_FillBuffer( p_input ) )
        {
            if( p_input->b_die || p_input->b_error || p_input->b_eof )
            {
                module_Unneed( p_input, p_input->p_access );
                if ( p_input->stream.p_sout != NULL )
                {
                    sout_DeleteInstance( p_input->stream.p_sout );
                }
                input_AccessEnd( p_input );
                free( p_input->psz_source );
                if( p_input->psz_dupsource != NULL )
                {
                    free( p_input->psz_dupsource );
                }
                input_EsOutDelete( p_input->p_es_out );
                return VLC_EGENERIC;
            }
        }
    }

    /* Create the stream_t facilities */
    p_input->s = input_StreamNew( p_input );
    if( p_input->s == NULL )
    {
        /* should never occur yet */

        msg_Err( p_input, "cannot create stream_t" );

        module_Unneed( p_input, p_input->p_access );
        if ( p_input->stream.p_sout != NULL )
        {
            sout_DeleteInstance( p_input->stream.p_sout );
        }
        input_AccessEnd( p_input );
        free( p_input->psz_source );
        if( p_input->psz_dupsource != NULL )
        {
            free( p_input->psz_dupsource );
        }
        input_EsOutDelete( p_input->p_es_out );
        return VLC_EGENERIC;
    }

    /* Find and open appropriate demux module */
    p_input->p_demux =
        module_Need( p_input, "demux",
                     (p_input->psz_demux && *p_input->psz_demux) ?
                     p_input->psz_demux : "$demux",
                     (p_input->psz_demux && *p_input->psz_demux) ?
                     VLC_TRUE : VLC_FALSE );

    if( p_input->p_demux == NULL )
    {
        msg_Err( p_input, "no suitable demux module for `%s/%s://%s'",
                 p_input->psz_access, p_input->psz_demux, p_input->psz_name );

        input_StreamDelete( p_input->s );
        module_Unneed( p_input, p_input->p_access );
        if ( p_input->stream.p_sout != NULL )
        {
            sout_DeleteInstance( p_input->stream.p_sout );
        }
        input_AccessEnd( p_input );
        free( p_input->psz_source );
        if( p_input->psz_dupsource != NULL )
        {
            free( p_input->psz_dupsource );
        }
        input_EsOutDelete( p_input->p_es_out );
        return VLC_EGENERIC;
    }

    /* Init input_thread_sys_t */
    p_input->p_sys = malloc( sizeof( input_thread_sys_t ) );
    p_input->p_sys->i_sub = 0;
    p_input->p_sys->sub   = NULL;

    p_input->p_sys->i_stop_time = 0;

    /* get meta informations */
    if( !demux_Control( p_input, DEMUX_GET_META, &meta ) )
    {
        playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_input,
                                         VLC_OBJECT_PLAYLIST,  FIND_PARENT);
        playlist_item_t *p_item = NULL;
        input_info_category_t *p_cat;
        int i;

        if( p_playlist )
        {
            vlc_mutex_lock( &p_playlist->object_lock );
            p_item = playlist_ItemGetByPos( p_playlist, -1 );
            if( p_item )
            {
                vlc_mutex_lock( &p_item->lock );
            }
            vlc_mutex_unlock( &p_playlist->object_lock );
        }

        msg_Dbg( p_input, "meta informations:" );
        if( meta->i_meta > 0 )
        {
            p_cat = input_InfoCategory( p_input, _("File") );
            for( i = 0; i < meta->i_meta; i++ )
            {
                msg_Dbg( p_input, "  - '%s' = '%s'", _(meta->name[i]), meta->value[i] );
                if( !strcmp( meta->name[i], VLC_META_TITLE ) )
                {
                    playlist_ItemSetName( p_item, meta->value[i] );
                }
                if( !strcmp( meta->name[i], VLC_META_AUTHOR ) )
                {
                    playlist_ItemAddInfo( p_item, _("General"), _("Author"),
                                            meta->value[i] );
                }
                input_AddInfo( p_cat, _(meta->name[i]), "%s", meta->value[i] );
                if( p_item )
                {
                    playlist_ItemAddInfo( p_item, _("File"),
                                          _(meta->name[i]), "%s", meta->value[i] );
                }
            }
        }
        for( i = 0; i < meta->i_track; i++ )
        {
            vlc_meta_t *tk = meta->track[i];
            int j;

            msg_Dbg( p_input, "  - track[%d]:", i );
            if( tk->i_meta > 0 )
            {
                char *psz_cat = malloc( strlen(_("Stream")) + 10 );
                sprintf( psz_cat, "%s %d", _("Stream"), i );
                p_cat = input_InfoCategory( p_input, psz_cat );

                for( j = 0; j < tk->i_meta; j++ )
                {
                    msg_Dbg( p_input, "     - '%s' = '%s'", _(tk->name[j]), tk->value[j] );
                    input_AddInfo( p_cat, _(tk->name[j]), "%s", tk->value[j] );
                    if( p_item )
                    {
                        playlist_ItemAddInfo( p_item, psz_cat,
                                              _(tk->name[j]), "%s", tk->value[j] );
                    }
                }
            }
        }

        if( p_item )
        {
            vlc_mutex_unlock( &p_item->lock );
        }
        if( p_playlist ) vlc_object_release( p_playlist );

        vlc_meta_Delete( meta );
    }

    /* get length */
    if( !demux_Control( p_input, DEMUX_GET_LENGTH, &i_length ) && i_length > 0 )
    {
        input_info_category_t *p_cat = input_InfoCategory( p_input, _("File") );
        p_playlist = (playlist_t*)vlc_object_find( p_input,
                                                   VLC_OBJECT_PLAYLIST,
                                                   FIND_PARENT );
        if( p_playlist )
        {
            playlist_SetDuration( p_playlist, -1 , i_length );
            val.b_bool = p_playlist->i_index;
            var_Set( p_playlist, "item-change", val );
            vlc_object_release( p_playlist );
        }
        if( p_cat )
        {
            char psz_buffer[MSTRTIME_MAX_SIZE];
            input_AddInfo( p_cat, _("Duration"),
                           msecstotimestr( psz_buffer, i_length / 1000 ) );
        }

        /* Set start time */
        var_Get( p_input, "start-time", &val );
        if(  val.i_int > 0 )
        {
            double f_pos = (double)( (int64_t)val.i_int * I64C(1000000) ) / (double)i_length;

            if( f_pos >= 1.0 )
            {
                msg_Warn( p_input, "invalid start-time, ignored (start-time >= media length)" );
            }
            else
            {
                p_input->stream.p_selected_area->i_seek =
                    (int64_t)( f_pos * (double)p_input->stream.p_selected_area->i_size );

                msg_Dbg( p_input, "start-time %ds (%2.2f)", val.i_int, f_pos );
            }
        }
    }
    /* Set stop-time and check validity */
    var_Get( p_input, "stop-time", &val );
    if( val.i_int > 0 )
    {
        vlc_value_t start;

        var_Get( p_input, "start-time", &start );
        if( start.i_int >= val.i_int )
        {
            msg_Warn( p_input, "invalid stop-time, ignored (stop-time < start-time)" );
        }
        else
        {
            p_input->p_sys->i_stop_time = (int64_t)val.i_int * I64C(1000000);
            msg_Dbg( p_input, "stop-time %ds", val.i_int );
        }
    }

    /* get fps */
    if( demux_Control( p_input, DEMUX_GET_FPS, &f_fps ) || f_fps < 0.1 )
    {
        i_microsecondperframe = 0;
    }
    else
    {
        i_microsecondperframe = (int64_t)( (double)1000000.0 / (double)f_fps );
    }

    /* Look for and add subtitle files */
    var_Get( p_input, "sub-file", &val );
    if( val.psz_string && *val.psz_string )
    {
        subtitle_demux_t *p_sub;

        msg_Dbg( p_input, "force subtitle: %s", val.psz_string );
        if( ( p_sub = subtitle_New( p_input, strdup(val.psz_string),
                                    i_microsecondperframe ) ) )
        {
            p_sub_toselect = p_sub;
            TAB_APPEND( p_input->p_sys->i_sub, p_input->p_sys->sub, p_sub );
        }
    }
    psz_sub_file = val.psz_string;

    var_Get( p_input, "sub-autodetect-file", &val );
    if( val.b_bool )
    {
        subtitle_demux_t *p_sub;
        int i;
        char **tmp = subtitles_Detect( p_input, "", p_input->psz_name );
        char **tmp2 = tmp;
        for( i = 0; *tmp2 != NULL; i++ )
        {
            if( psz_sub_file == NULL || strcmp( psz_sub_file, *tmp2 ) )
            {
                if( ( p_sub = subtitle_New( p_input, *tmp2,
                                            i_microsecondperframe ) ) )
                {
                    TAB_APPEND( p_input->p_sys->i_sub, p_input->p_sys->sub, p_sub );
                }
            }
            free( *tmp2++ );
        }
        free( tmp );
    }
    if( psz_sub_file ) free( psz_sub_file );