input.c 110 KB
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/*****************************************************************************
 * input.c: input thread
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 *****************************************************************************
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 * Copyright (C) 1998-2007 the VideoLAN team
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 * $Id$
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 *
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 * Authors: Christophe Massiot <massiot@via.ecp.fr>
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 *          Laurent Aimar <fenrir@via.ecp.fr>
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 *
 * 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.
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 *
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 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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 *****************************************************************************/
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/*****************************************************************************
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 * Preamble
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 *****************************************************************************/
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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

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#include <vlc_common.h>
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#include <limits.h>
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#include <assert.h>
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#include <errno.h>
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#include "input_internal.h"
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#include "event.h"
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#include "es_out.h"
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#include "es_out_timeshift.h"
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#include "access.h"
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#include "demux.h"
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#include "stream.h"
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#include "item.h"
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#include "resource.h"
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#include <vlc_sout.h>
#include "../stream_output/stream_output.h"
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#include <vlc_dialog.h>
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#include <vlc_url.h>
#include <vlc_charset.h>
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#include <vlc_fs.h>
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#include <vlc_strings.h>
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#ifdef HAVE_SYS_STAT_H
#   include <sys/stat.h>
#endif

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/*****************************************************************************
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 * Local prototypes
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 *****************************************************************************/
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static void Destructor( input_thread_t * p_input );

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static  void *Run            ( vlc_object_t *p_this );
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static input_thread_t * Create  ( vlc_object_t *, input_item_t *,
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                                  const char *, bool, input_resource_t * );
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static  int             Init    ( input_thread_t *p_input );
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static void             End     ( input_thread_t *p_input );
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static void             MainLoop( input_thread_t *p_input, bool b_interactive );
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static void ObjectKillChildrens( input_thread_t *, vlc_object_t * );

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static inline int ControlPop( input_thread_t *, int *, vlc_value_t *, mtime_t i_deadline, bool b_postpone_seek );
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static void       ControlRelease( int i_type, vlc_value_t val );
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static bool       ControlIsSeekRequest( int i_type );
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static bool       Control( input_thread_t *, int, vlc_value_t );
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static int  UpdateTitleSeekpointFromAccess( input_thread_t * );
static void UpdateGenericFromAccess( input_thread_t * );

static int  UpdateTitleSeekpointFromDemux( input_thread_t * );
static void UpdateGenericFromDemux( input_thread_t * );
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static void MRLSections( input_thread_t *, char *, int *, int *, int *, int *);
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static input_source_t *InputSourceNew( input_thread_t *);
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static int  InputSourceInit( input_thread_t *, input_source_t *,
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                             const char *, const char *psz_forced_demux );
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static void InputSourceClean( input_source_t * );
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static void InputSourceMeta( input_thread_t *, input_source_t *, vlc_meta_t * );

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/* TODO */
//static void InputGetAttachments( input_thread_t *, input_source_t * );
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static void SlaveDemux( input_thread_t *p_input, bool *pb_demux_polled );
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static void SlaveSeek( input_thread_t *p_input );
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static void InputMetaUser( input_thread_t *p_input, vlc_meta_t *p_meta );
static void InputUpdateMeta( input_thread_t *p_input, vlc_meta_t *p_meta );
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static void InputGetExtraFiles( input_thread_t *p_input,
                                int *pi_list, char ***pppsz_list,
                                const char *psz_access, const char *psz_path );
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static void AppendAttachment( int *pi_attachment, input_attachment_t ***ppp_attachment,
                              int i_new, input_attachment_t **pp_new );

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static void SubtitleAdd( input_thread_t *p_input, char *psz_subtitle, bool b_forced );

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static void input_ChangeState( input_thread_t *p_input, int i_state ); /* TODO fix name */

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/* Do not let a pts_delay from access/demux go beyong 60s */
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#define INPUT_PTS_DELAY_MAX INT64_C(60000000)
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#undef input_Create
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/**
 * Create a new input_thread_t.
 *
 * You need to call input_Start on it when you are done
 * adding callback on the variables/events you want to monitor.
 *
 * \param p_parent a vlc_object
 * \param p_item an input item
 * \param psz_log an optional prefix for this input logs
 * \param p_resource an optional input ressource
 * \return a pointer to the spawned input thread
 */
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input_thread_t *input_Create( vlc_object_t *p_parent,
                              input_item_t *p_item,
                              const char *psz_log, input_resource_t *p_resource )
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{
    return Create( p_parent, p_item, psz_log, false, p_resource );
}

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#undef input_CreateAndStart
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/**
 * Create a new input_thread_t and start it.
 *
 * Provided for convenience.
 *
 * \see input_Create
 */
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input_thread_t *input_CreateAndStart( vlc_object_t *p_parent,
                                      input_item_t *p_item, const char *psz_log )
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{
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    input_thread_t *p_input = input_Create( p_parent, p_item, psz_log, NULL );
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    if( input_Start( p_input ) )
    {
        vlc_object_release( p_input );
        return NULL;
    }
    return p_input;
}

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#undef input_Read
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/**
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 * Initialize an input thread and run it until it stops by itself.
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 *
 * \param p_parent a vlc_object
 * \param p_item an input item
 * \return an error code, VLC_SUCCESS on success
 */
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int input_Read( vlc_object_t *p_parent, input_item_t *p_item )
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{
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    input_thread_t *p_input = Create( p_parent, p_item, NULL, false, NULL );
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    if( !p_input )
        return VLC_EGENERIC;

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    if( !Init( p_input ) )
    {
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        MainLoop( p_input, false );
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        End( p_input );
    }

    vlc_object_release( p_input );
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    return VLC_SUCCESS;
}

/**
 * Initialize an input and initialize it to preparse the item
 * This function is blocking. It will only accept parsing regular files.
 *
 * \param p_parent a vlc_object_t
 * \param p_item an input item
 * \return VLC_SUCCESS or an error
 */
int input_Preparse( vlc_object_t *p_parent, input_item_t *p_item )
{
    input_thread_t *p_input;

    /* Allocate descriptor */
    p_input = Create( p_parent, p_item, NULL, true, NULL );
    if( !p_input )
        return VLC_EGENERIC;

    if( !Init( p_input ) )
        End( p_input );

    vlc_object_release( p_input );

    return VLC_SUCCESS;
}

/**
 * Start a input_thread_t created by input_Create.
 *
 * You must not start an already running input_thread_t.
 *
 * \param the input thread to start
 */
int input_Start( input_thread_t *p_input )
{
    /* Create thread and wait for its readiness. */
    if( vlc_thread_create( p_input, "input", Run,
                           VLC_THREAD_PRIORITY_INPUT ) )
    {
        input_ChangeState( p_input, ERROR_S );
        msg_Err( p_input, "cannot create input thread" );
        return VLC_EGENERIC;
    }
    return VLC_SUCCESS;
}

/**
 * Request a running input thread to stop and die
 *
 * b_abort must be true when a user stop is requested and not because you have
 * detected an error or an eof. It will be used to properly send the
 * INPUT_EVENT_ABORT event.
 *
 * \param p_input the input thread to stop
 * \param b_abort true if the input has been aborted by a user request
 */
void input_Stop( input_thread_t *p_input, bool b_abort )
{
    /* Set die for input and ALL of this childrens (even (grand-)grand-childrens)
     * It is needed here even if it is done in INPUT_CONTROL_SET_DIE handler to
     * unlock the control loop */
    ObjectKillChildrens( p_input, VLC_OBJECT(p_input) );

    vlc_mutex_lock( &p_input->p->lock_control );
    p_input->p->b_abort |= b_abort;
    vlc_mutex_unlock( &p_input->p->lock_control );

    input_ControlPush( p_input, INPUT_CONTROL_SET_DIE, NULL );
}

input_resource_t *input_DetachResource( input_thread_t *p_input )
{
    assert( p_input->b_dead );

    input_resource_SetInput( p_input->p->p_resource, NULL );

    input_resource_t *p_resource = input_resource_Detach( p_input->p->p_resource );
    p_input->p->p_sout = NULL;

    return p_resource;
}

/**
 * Get the item from an input thread
 * FIXME it does not increase ref count of the item.
 * if it is used after p_input is destroyed nothing prevent it from
 * being freed.
 */
input_item_t *input_GetItem( input_thread_t *p_input )
{
    assert( p_input && p_input->p );
    return p_input->p->p_item;
}

/*****************************************************************************
 * ObjectKillChildrens
 *****************************************************************************/
static void ObjectKillChildrens( input_thread_t *p_input, vlc_object_t *p_obj )
{
    vlc_list_t *p_list;
    int i;

    /* FIXME ObjectKillChildrens seems a very bad idea in fact */
    i = vlc_internals( p_obj )->i_object_type;
    if( i == VLC_OBJECT_VOUT ||i == VLC_OBJECT_AOUT ||
        p_obj == VLC_OBJECT(p_input->p->p_sout) ||
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        i == VLC_OBJECT_DECODER )
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        return;

    vlc_object_kill( p_obj );

    p_list = vlc_list_children( p_obj );
    for( i = 0; i < p_list->i_count; i++ )
        ObjectKillChildrens( p_input, p_list->p_values[i].p_object );
    vlc_list_release( p_list );
}

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/*****************************************************************************
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 * This function creates a new input, and returns a pointer
 * to its description. On error, it returns NULL.
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 *
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 * XXX Do not forget to update vlc_input.h if you add new variables.
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 *****************************************************************************/
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static input_thread_t *Create( vlc_object_t *p_parent, input_item_t *p_item,
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                               const char *psz_header, bool b_quick,
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                               input_resource_t *p_resource )
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{
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    static const char input_name[] = "input";
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    input_thread_t *p_input = NULL;                 /* thread descriptor */
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    int i;
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    /* Allocate descriptor */
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    p_input = vlc_custom_create( p_parent, sizeof( *p_input ),
                                 VLC_OBJECT_INPUT, input_name );
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    if( p_input == NULL )
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        return NULL;
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    vlc_object_attach( p_input, p_parent );

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    /* Construct a nice name for the input timer */
    char psz_timer_name[255];
    char * psz_name = input_item_GetName( p_item );
    snprintf( psz_timer_name, sizeof(psz_timer_name),
              "input launching for '%s'", psz_name );
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    msg_Dbg( p_input, "Creating an input for '%s'", psz_name);

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    free( psz_name );

    /* Start a timer to mesure how long it takes
     * to launch an input */
    stats_TimerStart( p_input, psz_timer_name,
        STATS_TIMER_INPUT_LAUNCHING );

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    p_input->p = calloc( 1, sizeof( input_thread_private_t ) );
    if( !p_input->p )
        return NULL;
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    p_input->b_preparsing = b_quick;
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    p_input->psz_header = psz_header ? strdup( psz_header ) : NULL;
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    /* Init Common fields */
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    p_input->b_eof = false;
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    p_input->p->b_can_pace_control = true;
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    p_input->p->i_start = 0;
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    p_input->p->i_time  = 0;
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    p_input->p->i_stop  = 0;
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    p_input->p->i_run   = 0;
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    p_input->p->i_title = 0;
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    p_input->p->title = NULL;
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    p_input->p->i_title_offset = p_input->p->i_seekpoint_offset = 0;
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    p_input->p->i_state = INIT_S;
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    double f_rate = var_InheritFloat( p_input, "rate" );
    if( f_rate <= 0. )
    {
        msg_Warn( p_input, "Negative or zero rate values are forbidden" );
        f_rate = 1.;
    }
    p_input->p->i_rate = INPUT_RATE_DEFAULT / f_rate;
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    p_input->p->b_recording = false;
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    memset( &p_input->p->bookmark, 0, sizeof(p_input->p->bookmark) );
    TAB_INIT( p_input->p->i_bookmark, p_input->p->pp_bookmark );
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    TAB_INIT( p_input->p->i_attachment, p_input->p->attachment );
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    p_input->p->p_sout   = NULL;
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    p_input->p->b_out_pace_control = false;
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    vlc_gc_incref( p_item ); /* Released in Destructor() */
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    p_input->p->p_item = p_item;

    /* Init Input fields */
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    p_input->p->input.p_access = NULL;
    p_input->p->input.p_stream = NULL;
    p_input->p->input.p_demux  = NULL;
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    p_input->p->input.b_title_demux = false;
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    p_input->p->input.i_title  = 0;
    p_input->p->input.title    = NULL;
    p_input->p->input.i_title_offset = p_input->p->input.i_seekpoint_offset = 0;
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    p_input->p->input.b_can_pace_control = true;
    p_input->p->input.b_can_rate_control = true;
    p_input->p->input.b_rescale_ts = true;
    p_input->p->input.b_eof = false;
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    vlc_mutex_lock( &p_item->lock );
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    if( !p_item->p_stats )
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        p_item->p_stats = stats_NewInputStats( p_input );
    vlc_mutex_unlock( &p_item->lock );
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    /* No slave */
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    p_input->p->i_slave = 0;
    p_input->p->slave   = NULL;
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    /* */
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    if( p_resource )
        p_input->p->p_resource = p_resource;
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    else
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        p_input->p->p_resource = input_resource_New();
    input_resource_SetInput( p_input->p->p_resource, p_input );
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    /* Init control buffer */
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    vlc_mutex_init( &p_input->p->lock_control );
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    vlc_cond_init( &p_input->p->wait_control );
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    p_input->p->i_control = 0;
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    p_input->p->b_abort = false;
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    /* Parse input options */
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    vlc_mutex_lock( &p_item->lock );
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    assert( (int)p_item->optflagc == p_item->i_options );
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    for( i = 0; i < p_item->i_options; i++ )
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        var_OptionParse( VLC_OBJECT(p_input), p_item->ppsz_options[i],
                         !!(p_item->optflagv[i] & VLC_INPUT_OPTION_TRUSTED) );
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    vlc_mutex_unlock( &p_item->lock );
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    /* Create Object Variables for private use only */
    input_ConfigVarInit( p_input );
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    /* Create Objects variables for public Get and Set */
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    input_ControlVarInit( p_input );
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    /* */
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    if( !p_input->b_preparsing )
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    {
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        char *psz_bookmarks = var_GetNonEmptyString( p_input, "bookmarks" );
        if( psz_bookmarks )
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        {
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            /* FIXME: have a common cfg parsing routine used by sout and others */
            char *psz_parser, *psz_start, *psz_end;
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            psz_parser = psz_bookmarks;
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            while( (psz_start = strchr( psz_parser, '{' ) ) )
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            {
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                 seekpoint_t *p_seekpoint;
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                 char backup;
                 psz_start++;
                 psz_end = strchr( psz_start, '}' );
                 if( !psz_end ) break;
                 psz_parser = psz_end + 1;
                 backup = *psz_parser;
                 *psz_parser = 0;
                 *psz_end = ',';
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                 p_seekpoint = vlc_seekpoint_New();
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                 while( (psz_end = strchr( psz_start, ',' ) ) )
                 {
                     *psz_end = 0;
                     if( !strncmp( psz_start, "name=", 5 ) )
                     {
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                         p_seekpoint->psz_name = strdup(psz_start + 5);
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                     }
                     else if( !strncmp( psz_start, "bytes=", 6 ) )
                     {
                         p_seekpoint->i_byte_offset = atoll(psz_start + 6);
                     }
                     else if( !strncmp( psz_start, "time=", 5 ) )
                     {
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                         p_seekpoint->i_time_offset = atoll(psz_start + 5) *
                                                        1000000;
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                     }
                     psz_start = psz_end + 1;
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                }
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                msg_Dbg( p_input, "adding bookmark: %s, bytes=%"PRId64", time=%"PRId64,
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                                  p_seekpoint->psz_name, p_seekpoint->i_byte_offset,
                                  p_seekpoint->i_time_offset );
                input_Control( p_input, INPUT_ADD_BOOKMARK, p_seekpoint );
                vlc_seekpoint_Delete( p_seekpoint );
                *psz_parser = backup;
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            }
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            free( psz_bookmarks );
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        }
    }

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    /* Remove 'Now playing' info as it is probably outdated */
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    input_item_SetNowPlaying( p_item, NULL );
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    input_SendEventMeta( p_input );
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    /* */
    if( p_input->b_preparsing )
        p_input->i_flags |= OBJECT_FLAGS_QUIET | OBJECT_FLAGS_NOINTERACT;

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    /* Make sure the interaction option is honored */
    if( !var_InheritBool( p_input, "interact" ) )
        p_input->i_flags |= OBJECT_FLAGS_NOINTERACT;

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    /* */
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    memset( &p_input->p->counters, 0, sizeof( p_input->p->counters ) );
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    vlc_mutex_init( &p_input->p->counters.counters_lock );
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    p_input->p->p_es_out_display = input_EsOutNew( p_input, p_input->p->i_rate );
    p_input->p->p_es_out = NULL;

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    /* Set the destructor when we are sure we are initialized */
    vlc_object_set_destructor( p_input, (vlc_destructor_t)Destructor );

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    return p_input;
}

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/**
 * Input destructor (called when the object's refcount reaches 0).
 */
static void Destructor( input_thread_t * p_input )
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{
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#ifndef NDEBUG
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    char * psz_name = input_item_GetName( p_input->p->p_item );
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    msg_Dbg( p_input, "Destroying the input for '%s'", psz_name);
    free( psz_name );
#endif

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    stats_TimerDump( p_input, STATS_TIMER_INPUT_LAUNCHING );
    stats_TimerClean( p_input, STATS_TIMER_INPUT_LAUNCHING );
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    if( p_input->p->p_es_out_display )
        es_out_Delete( p_input->p->p_es_out_display );

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    if( p_input->p->p_resource )
        input_resource_Delete( p_input->p->p_resource );
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    vlc_gc_decref( p_input->p->p_item );
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    vlc_mutex_destroy( &p_input->p->counters.counters_lock );

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    for( int i = 0; i < p_input->p->i_control; i++ )
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    {
        input_control_t *p_ctrl = &p_input->p->control[i];
        ControlRelease( p_ctrl->i_type, p_ctrl->val );
    }
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    vlc_cond_destroy( &p_input->p->wait_control );
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    vlc_mutex_destroy( &p_input->p->lock_control );
    free( p_input->p );
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}
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/*****************************************************************************
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 * Run: main thread loop
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 * This is the "normal" thread that spawns the input processing chain,
 * reads the stream, cleans up and waits
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 *****************************************************************************/
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static void *Run( vlc_object_t *p_this )
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{
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    input_thread_t *p_input = (input_thread_t *)p_this;
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    const int canc = vlc_savecancel();
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    if( Init( p_input ) )
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        goto exit;
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    MainLoop( p_input, true ); /* FIXME it can be wrong (like with VLM) */
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    /* Clean up */
    End( p_input );
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exit:
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    /* Tell we're dead */
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    vlc_mutex_lock( &p_input->p->lock_control );
    const bool b_abort = p_input->p->b_abort;
    vlc_mutex_unlock( &p_input->p->lock_control );

    if( b_abort )
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        input_SendEventAbort( p_input );
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    input_SendEventDead( p_input );
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    vlc_restorecancel( canc );
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    return NULL;
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}

/*****************************************************************************
 * Main loop: Fill buffers from access, and demux
 *****************************************************************************/
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/**
 * MainLoopDemux
 * It asks the demuxer to demux some data
 */
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static void MainLoopDemux( input_thread_t *p_input, bool *pb_changed, bool *pb_demux_polled, mtime_t i_start_mdate )
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{
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    int i_ret;
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    *pb_changed = false;
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    *pb_demux_polled = p_input->p->input.p_demux->pf_demux != NULL;
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    if( ( p_input->p->i_stop > 0 && p_input->p->i_time >= p_input->p->i_stop ) ||
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        ( p_input->p->i_run > 0 && i_start_mdate+p_input->p->i_run < mdate() ) )
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        i_ret = 0; /* EOF */
    else
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        i_ret = demux_Demux( p_input->p->input.p_demux );
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    if( i_ret > 0 )
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    {
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        if( p_input->p->input.p_demux->info.i_update )
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        {
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            if( p_input->p->input.b_title_demux )
            {
                i_ret = UpdateTitleSeekpointFromDemux( p_input );
                *pb_changed = true;
            }
            UpdateGenericFromDemux( p_input );
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        }
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        else if( p_input->p->input.p_access &&
                 p_input->p->input.p_access->info.i_update )
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        {
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            if( !p_input->p->input.b_title_demux )
            {
                i_ret = UpdateTitleSeekpointFromAccess( p_input );
                *pb_changed = true;
            }
            UpdateGenericFromAccess( p_input );
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        }
    }
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    if( i_ret == 0 )    /* EOF */
    {
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        msg_Dbg( p_input, "EOF reached" );
        p_input->p->input.b_eof = true;
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    }
    else if( i_ret < 0 )
    {
        input_ChangeState( p_input, ERROR_S );
    }

    if( i_ret > 0 && p_input->p->i_slave > 0 )
    {
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        bool b_demux_polled;
        SlaveDemux( p_input, &b_demux_polled );

        *pb_demux_polled |= b_demux_polled;
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    }
}

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static int MainLoopTryRepeat( input_thread_t *p_input, mtime_t *pi_start_mdate )
{
    int i_repeat = var_GetInteger( p_input, "input-repeat" );
    if( i_repeat == 0 )
        return VLC_EGENERIC;

    vlc_value_t val;

    msg_Dbg( p_input, "repeating the same input (%d)", i_repeat );
    if( i_repeat > 0 )
    {
        i_repeat--;
        var_SetInteger( p_input, "input-repeat", i_repeat );
    }

    /* Seek to start title/seekpoint */
    val.i_int = p_input->p->input.i_title_start -
        p_input->p->input.i_title_offset;
    if( val.i_int < 0 || val.i_int >= p_input->p->input.i_title )
        val.i_int = 0;
    input_ControlPush( p_input,
                       INPUT_CONTROL_SET_TITLE, &val );

    val.i_int = p_input->p->input.i_seekpoint_start -
        p_input->p->input.i_seekpoint_offset;
    if( val.i_int > 0 /* TODO: check upper boundary */ )
        input_ControlPush( p_input,
                           INPUT_CONTROL_SET_SEEKPOINT, &val );

    /* Seek to start position */
    if( p_input->p->i_start > 0 )
    {
        val.i_time = p_input->p->i_start;
        input_ControlPush( p_input, INPUT_CONTROL_SET_TIME, &val );
    }
    else
    {
        val.f_float = 0.0;
        input_ControlPush( p_input, INPUT_CONTROL_SET_POSITION, &val );
    }

    /* */
    *pi_start_mdate = mdate();
    return VLC_SUCCESS;
}

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/**
 * MainLoopInterface
 * It update the variables used by the interfaces
 */
static void MainLoopInterface( input_thread_t *p_input )
{
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    double f_position = 0.0;
    mtime_t i_time = 0;
    mtime_t i_length = 0;
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    /* update input status variables */
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    if( demux_Control( p_input->p->input.p_demux,
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                       DEMUX_GET_POSITION, &f_position ) )
        f_position = 0.0;
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    if( demux_Control( p_input->p->input.p_demux,
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                       DEMUX_GET_TIME, &i_time ) )
        i_time = 0;
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    p_input->p->i_time = i_time;
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    if( demux_Control( p_input->p->input.p_demux,
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                       DEMUX_GET_LENGTH, &i_length ) )
        i_length = 0;
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    es_out_SetTimes( p_input->p->p_es_out, f_position, i_time, i_length );
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    /* update current bookmark */
    vlc_mutex_lock( &p_input->p->p_item->lock );
    p_input->p->bookmark.i_time_offset = i_time;
    if( p_input->p->input.p_stream )
        p_input->p->bookmark.i_byte_offset = stream_Tell( p_input->p->input.p_stream );
    vlc_mutex_unlock( &p_input->p->p_item->lock );
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}

/**
 * MainLoopStatistic
 * It updates the globals statics
 */
static void MainLoopStatistic( input_thread_t *p_input )
{
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    stats_ComputeInputStats( p_input, p_input->p->p_item->p_stats );
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    input_SendEventStatistics( p_input );
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}

/**
 * MainLoop
 * The main input loop.
 */
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static void MainLoop( input_thread_t *p_input, bool b_interactive )
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{
    mtime_t i_start_mdate = mdate();
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    mtime_t i_intf_update = 0;
    mtime_t i_statistic_update = 0;
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    mtime_t i_last_seek_mdate = 0;
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    bool b_pause_after_eof = b_interactive &&
                             var_CreateGetBool( p_input, "play-and-pause" );
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    /* Start the timer */
    stats_TimerStop( p_input, STATS_TIMER_INPUT_LAUNCHING );

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    while( vlc_object_alive( p_input ) && !p_input->b_error )
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    {
        bool b_force_update;
        vlc_value_t val;
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        mtime_t i_current;
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        mtime_t i_wakeup;
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        bool b_paused;
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        bool b_demux_polled;
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        /* Demux data */
        b_force_update = false;
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        i_wakeup = 0;
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        /* FIXME if p_input->p->i_state == PAUSE_S the access/access_demux
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         * is paused -> this may cause problem with some of them
         * The same problem can be seen when seeking while paused */
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        b_paused = p_input->p->i_state == PAUSE_S &&
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                   ( !es_out_GetBuffering( p_input->p->p_es_out ) || p_input->p->input.b_eof );
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        b_demux_polled = true;
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        if( !b_paused )
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        {
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            if( !p_input->p->input.b_eof )
            {
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                MainLoopDemux( p_input, &b_force_update, &b_demux_polled, i_start_mdate );
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                i_wakeup = es_out_GetWakeup( p_input->p->p_es_out );
            }
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            else if( !es_out_GetEmpty( p_input->p->p_es_out ) )
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            {
                msg_Dbg( p_input, "waiting decoder fifos to empty" );
                i_wakeup = mdate() + INPUT_IDLE_SLEEP;
            }
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            /* Pause after eof only if the input is pausable.
             * This way we won't trigger timeshifting for nothing */
            else if( b_pause_after_eof && p_input->p->b_can_pause )
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            {
                msg_Dbg( p_input, "pausing at EOF (pause after each)");
                val.i_int = PAUSE_S;
                Control( p_input, INPUT_CONTROL_SET_STATE, val );

                b_pause_after_eof = false;
                b_paused = true;
            }
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            else
            {
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                if( MainLoopTryRepeat( p_input, &i_start_mdate ) )
                    break;
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                b_pause_after_eof = var_GetBool( p_input, "play-and-pause" );
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            }
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        }
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        /* */
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        do {
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            mtime_t i_deadline = i_wakeup;
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            if( b_paused || !b_demux_polled )
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                i_deadline = __MIN( i_intf_update, i_statistic_update );

            /* Handle control */
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            for( ;; )
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            {
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                mtime_t i_limit = i_deadline;

                /* We will postpone the execution of a seek until we have
                 * finished the ES bufferisation (postpone is limited to
                 * 125ms) */
                bool b_buffering = es_out_GetBuffering( p_input->p->p_es_out ) &&
                                   !p_input->p->input.b_eof;
                if( b_buffering )
                {
                    /* When postpone is in order, check the ES level every 20ms */
                    mtime_t i_current = mdate();
                    if( i_last_seek_mdate + INT64_C(125000) >= i_current )
                        i_limit = __MIN( i_deadline, i_current + INT64_C(20000) );
                }

                int i_type;
                if( ControlPop( p_input, &i_type, &val, i_limit, b_buffering ) )
                {
                    if( b_buffering && i_limit < i_deadline )
                        continue;
                    break;
                }
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                msg_Dbg( p_input, "control type=%d", i_type );
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                if( Control( p_input, i_type, val ) )
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                {
                    if( ControlIsSeekRequest( i_type ) )
                        i_last_seek_mdate = mdate();
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                    b_force_update = true;
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                }
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            }
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            /* Update interface and statistics */
            i_current = mdate();
            if( i_intf_update < i_current || b_force_update )
            {
                MainLoopInterface( p_input );
                i_intf_update = i_current + INT64_C(250000);
                b_force_update = false;
            }
            if( i_statistic_update < i_current )
            {
                MainLoopStatistic( p_input );
                i_statistic_update = i_current + INT64_C(1000000);
            }
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            /* Update the wakeup time */
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            if( i_wakeup != 0 )
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                i_wakeup = es_out_GetWakeup( p_input->p->p_es_out );
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        } while( i_current < i_wakeup );
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    }
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    if( !p_input->b_error )
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        input_ChangeState( p_input, END_S );
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}

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static void InitStatistics( input_thread_t * p_input )
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{
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    if( p_input->b_preparsing ) return;
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    /* Prepare statistics */
#define INIT_COUNTER( c, type, compute ) p_input->p->counters.p_##c = \
 stats_CounterCreate( p_input, VLC_VAR_##type, STATS_##compute);
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    if( libvlc_stats( p_input ) )
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    {
        INIT_COUNTER( read_bytes, INTEGER, COUNTER );
        INIT_COUNTER( read_packets, INTEGER, COUNTER );
        INIT_COUNTER( demux_read, INTEGER, COUNTER );
        INIT_COUNTER( input_bitrate, FLOAT, DERIVATIVE );
        INIT_COUNTER( demux_bitrate, FLOAT, DERIVATIVE );
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        INIT_COUNTER( demux_corrupted, INTEGER, COUNTER );
        INIT_COUNTER( demux_discontinuity, INTEGER, COUNTER );
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        INIT_COUNTER( played_abuffers, INTEGER, COUNTER );
        INIT_COUNTER( lost_abuffers, INTEGER, COUNTER );
        INIT_COUNTER( displayed_pictures, INTEGER, COUNTER );
        INIT_COUNTER( lost_pictures, INTEGER, COUNTER );
        INIT_COUNTER( decoded_audio, INTEGER, COUNTER );
        INIT_COUNTER( decoded_video, INTEGER, COUNTER );
        INIT_COUNTER( decoded_sub, INTEGER, COUNTER );
        p_input->p->counters.p_sout_send_bitrate = NULL;
        p_input->p->counters.p_sout_sent_packets = NULL;
        p_input->p->counters.p_sout_sent_bytes = NULL;
        if( p_input->p->counters.p_demux_bitrate )
            p_input->p->counters.p_demux_bitrate->update_interval = 1000000;
        if( p_input->p->counters.p_input_bitrate )
            p_input->p->counters.p_input_bitrate->update_interval = 1000000;
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    }
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}
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#ifdef ENABLE_SOUT
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static int InitSout( input_thread_t * p_input )
{
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    if( p_input->b_preparsing )
        return VLC_SUCCESS;
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    /* Find a usable sout and attach it to p_input */
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    char *psz = var_GetNonEmptyString( p_input, "sout" );
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    if( psz && strncasecmp( p_input->p->p_item->psz_uri, "vlc:", 4 ) )
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    {
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        p_input->p->p_sout  = input_resource_RequestSout( p_input->p->p_resource, NULL, psz );
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        if( !p_input->p->p_sout )
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        {
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            input_ChangeState( p_input, ERROR_S );
            msg_Err( p_input, "cannot start stream output instance, " \
                              "aborting" );
            free( psz );
            return VLC_EGENERIC;
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        }
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        if( libvlc_stats( p_input ) )
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        {
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            INIT_COUNTER( sout_sent_packets, INTEGER, COUNTER );
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            INIT_COUNTER( sout_sent_bytes, INTEGER, COUNTER );
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            INIT_COUNTER( sout_send_bitrate, FLOAT, DERIVATIVE );
            if( p_input->p->counters.p_sout_send_bitrate )
                 p_input->p->counters.p_sout_send_bitrate->update_interval =
                         1000000;
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        }
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    }
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    else
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    {
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        input_resource_RequestSout( p_input->p->p_resource, NULL, NULL );
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    }
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    free( psz );
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    return VLC_SUCCESS;
}
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#endif
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static void InitTitle( input_thread_t * p_input )
{
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    input_source_t *p_master = &p_input->p->input;
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    if( p_input->b_preparsing )
        return;
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    /* Create global title (from master) */
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    p_input->p->i_title = p_master->i_title;
    p_input->p->title   = p_master->title;
    p_input->p->i_title_offset = p_master->i_title_offset;
    p_input->p->i_seekpoint_offset = p_master->i_seekpoint_offset;
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    if( p_input->p->i_title > 0 )
    {
        /* Setup variables */
        input_ControlVarNavigation( p_input );
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        input_SendEventTitle( p_input, 0 );
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    }

    /* Global flag */
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    p_input->p->b_can_pace_control    = p_master->b_can_pace_control;
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    p_input->p->b_can_pause        = p_master->b_can_pause;
    p_input->p->b_can_rate_control = p_master->b_can_rate_control;
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}
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static void StartTitle( input_thread_t * p_input )
{
    vlc_value_t val;
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    /* Start title/chapter */
    val.i_int = p_input->p->input.i_title_start -
                p_input->p->input.i_title_offset;
    if( val.i_int > 0 && val.i_int < p_input->p->input.i_title )
        input_ControlPush( p_input, INPUT_CONTROL_SET_TITLE, &val );
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    val.i_int = p_input->p->input.i_seekpoint_start -
                p_input->p->input.i_seekpoint_offset;
    if( val.i_int > 0 /* TODO: check upper boundary */ )
        input_ControlPush( p_input, INPUT_CONTROL_SET_SEEKPOINT, &val );

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    /* Start/stop/run time */
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    p_input->p->i_start = (int64_t)(1000000.0
                                     * var_GetFloat( p_input, "start-time" ));
    p_input->p->i_stop  = (int64_t)(1000000.0
                                     * var_GetFloat( p_input, "stop-time" ));
    p_input->p->i_run   = (int64_t)(1000000.0
                                     * var_GetFloat( p_input, "run-time" ));
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    if( p_input->p->i_run < 0 )
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    {
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        msg_Warn( p_input, "invalid run-time ignored" );
        p_input->p->i_run = 0;
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    }
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    if( p_input->p->i_start > 0 )
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    {
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        vlc_value_t s;
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        msg_Dbg( p_input, "starting at time: %ds",
                 (int)( p_input->p->i_start / INT64_C(1000000) ) );
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        s.i_time = p_input->p->i_start;
        input_ControlPush( p_input, INPUT_CONTROL_SET_TIME, &s );
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    }
    if( p_input->p->i_stop > 0 && p_input->p->i_stop <= p_input->p->i_start )
    {
        msg_Warn( p_input, "invalid stop-time ignored" );
        p_input->p->i_stop = 0;
    }
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    p_input->p->b_fast_seek = var_GetBool( p_input, "input-fast-seek" );
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}