es_out.c 79.4 KB
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/*****************************************************************************
 * es_out.c: Es Out handler for input.
 *****************************************************************************
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 * Copyright (C) 2003-2004 the VideoLAN team
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 * $Id$
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
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 *          Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
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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.
 *
 * 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
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

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#include <stdio.h>
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#include <assert.h>
#include <vlc_common.h>
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#include <vlc_input.h>
#include <vlc_es_out.h>
#include <vlc_block.h>
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#include <vlc_aout.h>
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#include "input_internal.h"
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#include "clock.h"
#include "decoder.h"
#include "es_out.h"
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#include "event.h"
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#include "../stream_output/stream_output.h"

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#include <vlc_iso_lang.h>
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/* FIXME we should find a better way than including that */
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#include "../text/iso-639_def.h"
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/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
typedef struct
{
    /* Program ID */
    int i_id;

    /* Number of es for this pgrm */
    int i_es;

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    bool b_selected;
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    /* Clock for this program */
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    input_clock_t *p_clock;
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    char    *psz_name;
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    char    *psz_now_playing;
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    char    *psz_publisher;
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    vlc_epg_t *p_epg;
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} es_out_pgrm_t;

struct es_out_id_t
{
    /* ES ID */
    int       i_id;
    es_out_pgrm_t *p_pgrm;

    /* Channel in the track type */
    int         i_channel;
    es_format_t fmt;
    char        *psz_language;
    char        *psz_language_code;
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    decoder_t   *p_dec;
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    decoder_t   *p_dec_record;
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    /* Fields for Video with CC */
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    bool  pb_cc_present[4];
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    es_out_id_t  *pp_cc_es[4];

    /* Field for CC track from a master video */
    es_out_id_t *p_master;
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    /* ID for the meta data */
    int         i_meta_id;
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};

struct es_out_sys_t
{
    input_thread_t *p_input;

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    /* */
    vlc_mutex_t   lock;

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    /* all programs */
    int           i_pgrm;
    es_out_pgrm_t **pgrm;
    es_out_pgrm_t **pp_selected_pgrm; /* --programs */
    es_out_pgrm_t *p_pgrm;  /* Master program */

    /* all es */
    int         i_id;
    int         i_es;
    es_out_id_t **es;

    /* mode gestion */
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    bool  b_active;
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    int         i_mode;

    /* es count */
    int         i_audio;
    int         i_video;
    int         i_sub;

    /* es to select */
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    int         i_audio_last, i_audio_id;
    int         i_sub_last, i_sub_id;
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    int         i_default_sub_id;   /* As specified in container; if applicable */
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    char        **ppsz_audio_language;
    char        **ppsz_sub_language;

    /* current main es */
    es_out_id_t *p_es_audio;
    es_out_id_t *p_es_video;
    es_out_id_t *p_es_sub;

    /* delay */
    int64_t i_audio_delay;
    int64_t i_spu_delay;
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    /* Rate used for clock */
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    int         i_rate;
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    /* */
    bool        b_paused;
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    mtime_t     i_pause_date;
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    /* Current preroll */
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    mtime_t     i_preroll_end;
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    /* Used for buffering */
    bool        b_buffering;
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    mtime_t     i_buffering_extra_initial;
    mtime_t     i_buffering_extra_stream;
    mtime_t     i_buffering_extra_system;
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    /* Record */
    sout_instance_t *p_sout_record;
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};

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static es_out_id_t *EsOutAdd    ( es_out_t *, const es_format_t * );
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static int          EsOutSend   ( es_out_t *, es_out_id_t *, block_t * );
static void         EsOutDel    ( es_out_t *, es_out_id_t * );
static int          EsOutControl( es_out_t *, int i_query, va_list );
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static void         EsOutDelete ( es_out_t * );
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static void         EsOutSelect( es_out_t *, es_out_id_t *es, bool b_force );
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static void         EsOutUpdateInfo( es_out_t *, es_out_id_t *es, const es_format_t *, const vlc_meta_t * );
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static int          EsOutSetRecord(  es_out_t *, bool b_record );
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static bool EsIsSelected( es_out_id_t *es );
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static void EsSelect( es_out_t *out, es_out_id_t *es );
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static void EsUnselect( es_out_t *out, es_out_id_t *es, bool b_update );
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static void EsOutDecoderChangeDelay( es_out_t *out, es_out_id_t *p_es );
static void EsOutDecodersChangePause( es_out_t *out, bool b_paused, mtime_t i_date );
static void EsOutProgramChangePause( es_out_t *out, bool b_paused, mtime_t i_date );
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static void EsOutProgramsChangeRate( es_out_t *out );
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static void EsOutDecodersStopBuffering( es_out_t *out, bool b_forced );
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static char *LanguageGetName( const char *psz_code );
static char *LanguageGetCode( const char *psz_lang );
static char **LanguageSplit( const char *psz_langs );
static int LanguageArrayIndex( char **ppsz_langs, char *psz_lang );

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static char *EsOutProgramGetMetaName( es_out_pgrm_t *p_pgrm );

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static const vlc_fourcc_t EsOutFourccClosedCaptions[4] = {
    VLC_FOURCC('c', 'c', '1', ' '),
    VLC_FOURCC('c', 'c', '2', ' '),
    VLC_FOURCC('c', 'c', '3', ' '),
    VLC_FOURCC('c', 'c', '4', ' '),
};
static inline int EsOutGetClosedCaptionsChannel( vlc_fourcc_t fcc )
{
    int i;
    for( i = 0; i < 4; i++ )
    {
        if( fcc == EsOutFourccClosedCaptions[i] )
            return i;
    }
    return -1;
}


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/*****************************************************************************
 * input_EsOutNew:
 *****************************************************************************/
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es_out_t *input_EsOutNew( input_thread_t *p_input, int i_rate )
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{
    vlc_value_t  val;
    int i;

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    es_out_t     *out = malloc( sizeof( *out ) );
    if( !out )
        return NULL;
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    es_out_sys_t *p_sys = malloc( sizeof( *p_sys ) );
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    if( !p_sys )
    {
        free( out );
        return NULL;
    }

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    out->pf_add     = EsOutAdd;
    out->pf_send    = EsOutSend;
    out->pf_del     = EsOutDel;
    out->pf_control = EsOutControl;
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    out->pf_destroy = EsOutDelete;
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    out->p_sys      = p_sys;
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    out->b_sout     = p_input->p->p_sout != NULL;
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    vlc_mutex_init_recursive( &p_sys->lock );
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    p_sys->p_input = p_input;

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    p_sys->b_active = false;
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    p_sys->i_mode   = ES_OUT_MODE_AUTO;


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    TAB_INIT( p_sys->i_pgrm, p_sys->pgrm );
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    p_sys->p_pgrm   = NULL;

    p_sys->i_id    = 0;
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    TAB_INIT( p_sys->i_es, p_sys->es );
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    p_sys->i_audio = 0;
    p_sys->i_video = 0;
    p_sys->i_sub   = 0;

    /* */
    var_Get( p_input, "audio-track", &val );
    p_sys->i_audio_last = val.i_int;

    var_Get( p_input, "sub-track", &val );
    p_sys->i_sub_last = val.i_int;

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    p_sys->i_default_sub_id   = -1;

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    if( !p_input->b_preparsing )
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    {
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        var_Get( p_input, "audio-language", &val );
        p_sys->ppsz_audio_language = LanguageSplit(val.psz_string);
        if( p_sys->ppsz_audio_language )
        {
            for( i = 0; p_sys->ppsz_audio_language[i]; i++ )
                msg_Dbg( p_input, "selected audio language[%d] %s",
                         i, p_sys->ppsz_audio_language[i] );
        }
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        free( val.psz_string );
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        var_Get( p_input, "sub-language", &val );
        p_sys->ppsz_sub_language = LanguageSplit(val.psz_string);
        if( p_sys->ppsz_sub_language )
        {
            for( i = 0; p_sys->ppsz_sub_language[i]; i++ )
                msg_Dbg( p_input, "selected subtitle language[%d] %s",
                         i, p_sys->ppsz_sub_language[i] );
        }
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        free( val.psz_string );
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    }
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    else
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    {
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        p_sys->ppsz_sub_language = NULL;
        p_sys->ppsz_audio_language = NULL;
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    }

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    var_Get( p_input, "audio-track-id", &val );
    p_sys->i_audio_id = val.i_int;

    var_Get( p_input, "sub-track-id", &val );
    p_sys->i_sub_id = val.i_int;

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    p_sys->p_es_audio = NULL;
    p_sys->p_es_video = NULL;
    p_sys->p_es_sub   = NULL;

    p_sys->i_audio_delay= 0;
    p_sys->i_spu_delay  = 0;

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    p_sys->b_paused = false;
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    p_sys->i_pause_date = -1;
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    p_sys->i_rate = i_rate;

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    p_sys->b_buffering = true;
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    p_sys->i_buffering_extra_initial = 0;
    p_sys->i_buffering_extra_stream = 0;
    p_sys->i_buffering_extra_system = 0;
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    p_sys->i_preroll_end = -1;
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    p_sys->p_sout_record = NULL;

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    return out;
}

/*****************************************************************************
 *
 *****************************************************************************/
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static void EsOutDelete( es_out_t *out )
{
    es_out_sys_t *p_sys = out->p_sys;
    int i;

    if( p_sys->p_sout_record )
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        EsOutSetRecord( out, false );
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    for( i = 0; i < p_sys->i_es; i++ )
    {
        if( p_sys->es[i]->p_dec )
            input_DecoderDelete( p_sys->es[i]->p_dec );

        free( p_sys->es[i]->psz_language );
        free( p_sys->es[i]->psz_language_code );
        es_format_Clean( &p_sys->es[i]->fmt );

        free( p_sys->es[i] );
    }
    if( p_sys->ppsz_audio_language )
    {
        for( i = 0; p_sys->ppsz_audio_language[i]; i++ )
            free( p_sys->ppsz_audio_language[i] );
        free( p_sys->ppsz_audio_language );
    }
    if( p_sys->ppsz_sub_language )
    {
        for( i = 0; p_sys->ppsz_sub_language[i]; i++ )
            free( p_sys->ppsz_sub_language[i] );
        free( p_sys->ppsz_sub_language );
    }
    free( p_sys->es );

    /* FIXME duplicate work EsOutProgramDel (but we cannot use it) add a EsOutProgramClean ? */
    for( i = 0; i < p_sys->i_pgrm; i++ )
    {
        es_out_pgrm_t *p_pgrm = p_sys->pgrm[i];
        input_clock_Delete( p_pgrm->p_clock );
        free( p_pgrm->psz_now_playing );
        free( p_pgrm->psz_publisher );
        free( p_pgrm->psz_name );
        if( p_pgrm->p_epg )
            vlc_epg_Delete( p_pgrm->p_epg );

        free( p_pgrm );
    }
    TAB_CLEAN( p_sys->i_pgrm, p_sys->pgrm );
    vlc_mutex_destroy( &p_sys->lock );

    free( p_sys );
    free( out );
}

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static mtime_t EsOutGetWakeup( es_out_t *out )
{
    es_out_sys_t   *p_sys = out->p_sys;
    input_thread_t *p_input = p_sys->p_input;

    if( !p_sys->p_pgrm )
        return 0;

    /* We do not have a wake up date if the input cannot have its speed
     * controlled or sout is imposing its own or while buffering
     *
     * FIXME for !p_input->b_can_pace_control a wkeup time is still needed to avoid too strong buffering */
    if( !p_input->b_can_pace_control ||
        p_input->p->b_out_pace_control ||
        p_sys->b_buffering )
        return 0;

    return input_clock_GetWakeup( p_sys->p_pgrm->p_clock );
}

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static es_out_id_t *EsOutGetFromID( es_out_t *out, int i_id )
{
    int i;
    if( i_id < 0 )
    {
        /* Special HACK, -i_id is the cat of the stream */
        return (es_out_id_t*)((uint8_t*)NULL-i_id);
    }

    for( i = 0; i < out->p_sys->i_es; i++ )
    {
        if( out->p_sys->es[i]->i_id == i_id )
            return out->p_sys->es[i];
    }
    return NULL;
}
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static bool EsOutDecodersIsEmpty( es_out_t *out )
{
    es_out_sys_t      *p_sys = out->p_sys;
    int i;

    if( p_sys->b_buffering && p_sys->p_pgrm )
    {
        EsOutDecodersStopBuffering( out, true );
        if( p_sys->b_buffering )
            return true;
    }

    for( i = 0; i < p_sys->i_es; i++ )
    {
        es_out_id_t *es = p_sys->es[i];

        if( es->p_dec && !input_DecoderIsEmpty( es->p_dec ) )
            return false;
        if( es->p_dec_record && !input_DecoderIsEmpty( es->p_dec_record ) )
            return false;
    }
    return true;
}

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static void EsOutSetDelay( es_out_t *out, int i_cat, int64_t i_delay )
{
    es_out_sys_t *p_sys = out->p_sys;

    if( i_cat == AUDIO_ES )
        p_sys->i_audio_delay = i_delay;
    else if( i_cat == SPU_ES )
        p_sys->i_spu_delay = i_delay;

    for( int i = 0; i < p_sys->i_es; i++ )
        EsOutDecoderChangeDelay( out, p_sys->es[i] );
}

static int EsOutSetRecord(  es_out_t *out, bool b_record )
{
    es_out_sys_t   *p_sys = out->p_sys;
    input_thread_t *p_input = p_sys->p_input;

    assert( ( b_record && !p_sys->p_sout_record ) || ( !b_record && p_sys->p_sout_record ) );

    if( b_record )
    {
        char *psz_path = var_CreateGetString( p_input, "input-record-path" );
        if( !psz_path || *psz_path == '\0' )
        {
            free( psz_path );
            psz_path = strdup( config_GetHomeDir() );
        }

        char *psz_sout = NULL;  // TODO conf

        if( !psz_sout && psz_path )
        {
            char *psz_file = input_CreateFilename( VLC_OBJECT(p_input), psz_path, INPUT_RECORD_PREFIX, NULL );
            if( psz_file )
            {
                if( asprintf( &psz_sout, "#record{dst-prefix='%s'}", psz_file ) < 0 )
                    psz_sout = NULL;
                free( psz_file );
            }
        }
        free( psz_path );

        if( !psz_sout )
            return VLC_EGENERIC;

#ifdef ENABLE_SOUT
        p_sys->p_sout_record = sout_NewInstance( p_input, psz_sout );
#endif
        free( psz_sout );

        if( !p_sys->p_sout_record )
            return VLC_EGENERIC;

        for( int i = 0; i < p_sys->i_es; i++ )
        {
            es_out_id_t *p_es = p_sys->es[i];

            if( !p_es->p_dec || p_es->p_master )
                continue;

            p_es->p_dec_record = input_DecoderNew( p_input, &p_es->fmt, p_es->p_pgrm->p_clock, p_sys->p_sout_record );
            if( p_es->p_dec_record && p_sys->b_buffering )
                input_DecoderStartBuffering( p_es->p_dec_record );
        }
    }
    else
    {
        for( int i = 0; i < p_sys->i_es; i++ )
        {
            es_out_id_t *p_es = p_sys->es[i];

            if( !p_es->p_dec_record )
                continue;

            input_DecoderDelete( p_es->p_dec_record );
            p_es->p_dec_record = NULL;
        }
#ifdef ENABLE_SOUT
        sout_DeleteInstance( p_sys->p_sout_record );
#endif
        p_sys->p_sout_record = NULL;
    }

    return VLC_SUCCESS;
}
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static void EsOutChangePause( es_out_t *out, bool b_paused, mtime_t i_date )
{
    es_out_sys_t *p_sys = out->p_sys;

    /* XXX the order is important */
    if( b_paused )
    {
        EsOutDecodersChangePause( out, true, i_date );
        EsOutProgramChangePause( out, true, i_date );
    }
    else
    {
        if( p_sys->i_buffering_extra_initial > 0 )
        {
            mtime_t i_stream_start;
            mtime_t i_system_start;
            mtime_t i_stream_duration;
            mtime_t i_system_duration;
            int i_ret;
            i_ret = input_clock_GetState( p_sys->p_pgrm->p_clock,
                                          &i_stream_start, &i_system_start,
                                          &i_stream_duration, &i_system_duration );
            if( !i_ret )
            {
                /* FIXME pcr != exactly what wanted */
                const mtime_t i_used = /*(i_stream_duration - p_sys->p_input->i_pts_delay)*/ p_sys->i_buffering_extra_system - p_sys->i_buffering_extra_initial;
                i_date -= i_used;
            }
            p_sys->i_buffering_extra_initial = 0;
            p_sys->i_buffering_extra_stream = 0;
            p_sys->i_buffering_extra_system = 0;
        }
        EsOutProgramChangePause( out, false, i_date );
        EsOutDecodersChangePause( out, false, i_date );

        EsOutProgramsChangeRate( out );
    }
    p_sys->b_paused = b_paused;
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    p_sys->i_pause_date = i_date;
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}

static void EsOutChangeRate( es_out_t *out, int i_rate )
{
    es_out_sys_t      *p_sys = out->p_sys;

    p_sys->i_rate = i_rate;

    if( !p_sys->b_paused )
        EsOutProgramsChangeRate( out );
}

static void EsOutChangePosition( es_out_t *out )
{
    es_out_sys_t      *p_sys = out->p_sys;

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    input_SendEventCache( p_sys->p_input, 0.0 );

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    for( int i = 0; i < p_sys->i_es; i++ )
    {
        es_out_id_t *p_es = p_sys->es[i];

        if( !p_es->p_dec )
            continue;

        input_DecoderStartBuffering( p_es->p_dec );

        if( p_es->p_dec_record )
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            input_DecoderStartBuffering( p_es->p_dec_record );
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    }

    for( int i = 0; i < p_sys->i_pgrm; i++ )
        input_clock_Reset( p_sys->pgrm[i]->p_clock );

    p_sys->b_buffering = true;
    p_sys->i_buffering_extra_initial = 0;
    p_sys->i_buffering_extra_stream = 0;
    p_sys->i_buffering_extra_system = 0;
    p_sys->i_preroll_end = -1;
}

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static void EsOutDecodersStopBuffering( es_out_t *out, bool b_forced )
{
    es_out_sys_t *p_sys = out->p_sys;
    int i_ret;

    mtime_t i_stream_start;
    mtime_t i_system_start;
    mtime_t i_stream_duration;
    mtime_t i_system_duration;
    i_ret = input_clock_GetState( p_sys->p_pgrm->p_clock,
                                  &i_stream_start, &i_system_start,
                                  &i_stream_duration, &i_system_duration );
    assert( !i_ret || b_forced );
    if( i_ret )
        return;

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    mtime_t i_preroll_duration = 0;
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    if( p_sys->i_preroll_end >= 0 )
        i_preroll_duration = __MAX( p_sys->i_preroll_end - i_stream_start, 0 );
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    const mtime_t i_buffering_duration = p_sys->p_input->i_pts_delay +
                                         i_preroll_duration +
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                                         p_sys->i_buffering_extra_stream - p_sys->i_buffering_extra_initial;
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    if( i_stream_duration <= i_buffering_duration && !b_forced )
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    {
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        const double f_level = (double)i_stream_duration / i_buffering_duration;
        input_SendEventCache( p_sys->p_input, f_level );

        msg_Dbg( p_sys->p_input, "Buffering %d%%", (int)(100 * f_level) );
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        return;
    }
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    input_SendEventCache( p_sys->p_input, 1.0 );
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    msg_Dbg( p_sys->p_input, "Stream buffering done (%d ms in %d ms)",
              (int)(i_stream_duration/1000), (int)(i_system_duration/1000) );
    p_sys->b_buffering = false;
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    p_sys->i_preroll_end = -1;
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    if( p_sys->i_buffering_extra_initial > 0 )
    {
        /* FIXME wrong ? */
        return;
    }

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    const mtime_t i_decoder_buffering_start = mdate();
    for( int i = 0; i < p_sys->i_es; i++ )
    {
        es_out_id_t *p_es = p_sys->es[i];

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        if( !p_es->p_dec || p_es->fmt.i_cat == SPU_ES )
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            continue;
        input_DecoderWaitBuffering( p_es->p_dec );
        if( p_es->p_dec_record )
            input_DecoderWaitBuffering( p_es->p_dec_record );
    }

    msg_Dbg( p_sys->p_input, "Decoder buffering done in %d ms",
              (int)(mdate() - i_decoder_buffering_start)/1000 );

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    /* Here is a good place to destroy unused vout with every demuxer */
    input_ressource_TerminateVout( p_sys->p_input->p->p_ressource );

    /* */
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    const mtime_t i_wakeup_delay = 10*1000; /* FIXME CLEANUP thread wake up time*/
    const mtime_t i_current_date = p_sys->b_paused ? p_sys->i_pause_date : mdate();

    input_clock_ChangeSystemOrigin( p_sys->p_pgrm->p_clock, i_current_date + i_wakeup_delay - i_buffering_duration );
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    for( int i = 0; i < p_sys->i_es; i++ )
    {
        es_out_id_t *p_es = p_sys->es[i];

        if( !p_es->p_dec )
            continue;

        input_DecoderStopBuffering( p_es->p_dec );
        if( p_es->p_dec_record )
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            input_DecoderStopBuffering( p_es->p_dec_record );
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    }
}
static void EsOutDecodersChangePause( es_out_t *out, bool b_paused, mtime_t i_date )
{
    es_out_sys_t *p_sys = out->p_sys;

    /* Pause decoders first */
    for( int i = 0; i < p_sys->i_es; i++ )
    {
        es_out_id_t *es = p_sys->es[i];

        if( es->p_dec )
        {
            input_DecoderChangePause( es->p_dec, b_paused, i_date );
            if( es->p_dec_record )
                input_DecoderChangePause( es->p_dec_record, b_paused, i_date );
        }
    }
}
static void EsOutProgramChangePause( es_out_t *out, bool b_paused, mtime_t i_date )
{
    es_out_sys_t *p_sys = out->p_sys;

    for( int i = 0; i < p_sys->i_pgrm; i++ )
        input_clock_ChangePause( p_sys->pgrm[i]->p_clock, b_paused, i_date );
}

static void EsOutDecoderChangeDelay( es_out_t *out, es_out_id_t *p_es )
{
    es_out_sys_t *p_sys = out->p_sys;

    mtime_t i_delay = 0;
    if( p_es->fmt.i_cat == AUDIO_ES )
        i_delay = p_sys->i_audio_delay;
    else if( p_es->fmt.i_cat == SPU_ES )
        i_delay = p_sys->i_spu_delay;

    if( i_delay != 0 )
    {
        if( p_es->p_dec )
            input_DecoderChangeDelay( p_es->p_dec, i_delay );
        if( p_es->p_dec_record )
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            input_DecoderChangeDelay( p_es->p_dec_record, i_delay );
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    }
}
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static void EsOutProgramsChangeRate( es_out_t *out )
{
    es_out_sys_t      *p_sys = out->p_sys;
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    for( int i = 0; i < p_sys->i_pgrm; i++ )
        input_clock_ChangeRate( p_sys->pgrm[i]->p_clock, p_sys->i_rate );
}
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static void EsOutFrameNext( es_out_t *out )
{
    es_out_sys_t *p_sys = out->p_sys;
    es_out_id_t *p_es_video = NULL;

    if( p_sys->b_buffering )
    {
        msg_Warn( p_sys->p_input, "buffering, ignoring 'frame next'" );
        return;
    }

    assert( p_sys->b_paused );

    for( int i = 0; i < p_sys->i_es; i++ )
    {
        es_out_id_t *p_es = p_sys->es[i];

        if( p_es->fmt.i_cat == VIDEO_ES && p_es->p_dec )
        {
            p_es_video = p_es;
            break;
        }
    }

    if( !p_es_video )
    {
        msg_Warn( p_sys->p_input, "No video track selected, ignoring 'frame next'" );
        return;
    }

    mtime_t i_duration;
    input_DecoderFrameNext( p_es_video->p_dec, &i_duration );

    msg_Dbg( out->p_sys->p_input, "EsOutFrameNext consummed %d ms", (int)(i_duration/1000) );

    if( i_duration <= 0 )
        i_duration = 40*1000;

    /* FIXME it is not a clean way ? */
    if( p_sys->i_buffering_extra_initial <= 0 )
    {
        mtime_t i_stream_start;
        mtime_t i_system_start;
        mtime_t i_stream_duration;
        mtime_t i_system_duration;
        int i_ret;

        i_ret = input_clock_GetState( p_sys->p_pgrm->p_clock,
                                      &i_stream_start, &i_system_start,
                                      &i_stream_duration, &i_system_duration );
        if( i_ret )
            return;

        p_sys->i_buffering_extra_initial = 1 + i_stream_duration - p_sys->p_input->i_pts_delay; /* FIXME < 0 ? */
        p_sys->i_buffering_extra_system =
        p_sys->i_buffering_extra_stream = p_sys->i_buffering_extra_initial;
    }

    const int i_rate = input_clock_GetRate( p_sys->p_pgrm->p_clock );

    p_sys->b_buffering = true;
    p_sys->i_buffering_extra_system += i_duration;
    p_sys->i_buffering_extra_stream = p_sys->i_buffering_extra_initial +
                                      ( p_sys->i_buffering_extra_system - p_sys->i_buffering_extra_initial ) *
                                                INPUT_RATE_DEFAULT / i_rate;

    p_sys->i_preroll_end = -1;
}
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static mtime_t EsOutGetBuffering( es_out_t *out )
{
    es_out_sys_t *p_sys = out->p_sys;

    if( !p_sys->p_pgrm )
        return 0;

    int i_ret;
    mtime_t i_stream_start;
    mtime_t i_system_start;
    mtime_t i_stream_duration;
    mtime_t i_system_duration;
    i_ret = input_clock_GetState( p_sys->p_pgrm->p_clock,
                                  &i_stream_start, &i_system_start,
                                  &i_stream_duration, &i_system_duration );

    if( i_ret )
        return 0;
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    mtime_t i_delay;
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    if( p_sys->b_buffering && p_sys->i_buffering_extra_initial <= 0 )
    {
        i_delay = i_stream_duration;
    }
    else
    {
        mtime_t i_system_duration;
        if( p_sys->b_paused )
        {
            i_system_duration = p_sys->i_pause_date  - i_system_start;
            if( p_sys->i_buffering_extra_initial > 0 )
                i_system_duration += p_sys->i_buffering_extra_system - p_sys->i_buffering_extra_initial;
        }
        else
        {
            i_system_duration = mdate() - i_system_start;
        }

        const mtime_t i_consumed = i_system_duration * INPUT_RATE_DEFAULT / p_sys->i_rate - i_stream_duration;
        i_delay = p_sys->p_input->i_pts_delay - i_consumed;
    }
    if( i_delay < 0 )
        return 0;
    return i_delay;
}
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static void EsOutESVarUpdateGeneric( es_out_t *out, int i_id, es_format_t *fmt, const char *psz_language,
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                                     bool b_delete )
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{
    es_out_sys_t      *p_sys = out->p_sys;
    input_thread_t    *p_input = p_sys->p_input;
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    const  bool b_teletext = fmt->i_cat == SPU_ES && fmt->i_codec == VLC_FOURCC( 't', 'e', 'l', 'x' );
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    vlc_value_t       val, text;

    if( b_delete )
    {
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        /* TODO it should probably be a list */
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        if( b_teletext )
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            input_SendEventTeletext( p_sys->p_input, -1 );
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        input_SendEventEsDel( p_input, SPU_ES, i_id );
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        return;
    }

    /* Get the number of ES already added */
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    const char *psz_var;
    if( fmt->i_cat == AUDIO_ES )
        psz_var = "audio-es";
    else if( fmt->i_cat == VIDEO_ES )
        psz_var = "video-es";
    else
        psz_var = "spu-es";

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    var_Change( p_input, psz_var, VLC_VAR_CHOICESCOUNT, &val, NULL );
    if( val.i_int == 0 )
    {
        vlc_value_t val2;

        /* First one, we need to add the "Disable" choice */
        val2.i_int = -1; text.psz_string = _("Disable");
        var_Change( p_input, psz_var, VLC_VAR_ADDCHOICE, &val2, &text );
        val.i_int++;
    }

    /* Take care of the ES description */
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    if( fmt->psz_description && *fmt->psz_description )
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    {
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        if( psz_language && *psz_language )
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        {
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            text.psz_string = malloc( strlen( fmt->psz_description) +
                                      strlen( psz_language ) + 10 );
            sprintf( text.psz_string, "%s - [%s]", fmt->psz_description,
                                                   psz_language );
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        }
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        else text.psz_string = strdup( fmt->psz_description );
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    }
    else
    {
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        if( psz_language && *psz_language )
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        {
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            if( asprintf( &text.psz_string, "%s %i - [%s]", _( "Track" ), val.i_int, psz_language ) == -1 )
                text.psz_string = NULL;
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        }
        else
        {
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            if( asprintf( &text.psz_string, "%s %i", _( "Track" ), val.i_int ) == -1 )
                text.psz_string = NULL;
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        }
    }

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    input_SendEventEsAdd( p_input, fmt->i_cat, i_id, text.psz_string );
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    free( text.psz_string );

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    if( b_teletext )
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    {
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        /* TODO it should probably be a list */
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        if( var_GetInteger( p_sys->p_input, "teletext-es" ) < 0 )
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            input_SendEventTeletext( p_sys->p_input, i_id );
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    }
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}

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static void EsOutESVarUpdate( es_out_t *out, es_out_id_t *es,
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{
    EsOutESVarUpdateGeneric( out, es->i_id, &es->fmt, es->psz_language, b_delete );
}

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/* EsOutProgramSelect:
 *  Select a program and update the object variable
 */
static void EsOutProgramSelect( es_out_t *out, es_out_pgrm_t *p_pgrm )
{
    es_out_sys_t      *p_sys = out->p_sys;
    input_thread_t    *p_input = p_sys->p_input;
    int               i;

    if( p_sys->p_pgrm == p_pgrm )
        return; /* Nothing to do */

    if( p_sys->p_pgrm )
    {
        es_out_pgrm_t *old = p_sys->p_pgrm;
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        msg_Dbg( p_input, "unselecting program id=%d", old->i_id );
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        for( i = 0; i < p_sys->i_es; i++ )
        {
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            if( p_sys->es[i]->p_pgrm == old && EsIsSelected( p_sys->es[i] ) &&
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                p_sys->i_mode != ES_OUT_MODE_ALL )
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                EsUnselect( out, p_sys->es[i], true );
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        }

        p_sys->p_es_audio = NULL;
        p_sys->p_es_sub = NULL;
        p_sys->p_es_video = NULL;
    }

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    msg_Dbg( p_input, "selecting program id=%d", p_pgrm->i_id );
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    /* Mark it selected */
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    p_pgrm->b_selected = true;
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    /* Switch master stream */
    p_sys->p_pgrm = p_pgrm;

    /* Update "program" */
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    input_SendEventProgramSelect( p_input, p_pgrm->i_id );
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    /* Update "es-*" */
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    input_SendEventEsDel( p_input, AUDIO_ES, -1 );
    input_SendEventEsDel( p_input, VIDEO_ES, -1 );
    input_SendEventEsDel( p_input, SPU_ES, -1 );

    /* TODO event */
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    var_SetInteger( p_input, "teletext-es", -1 );
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    for( i = 0; i < p_sys->i_es; i++ )
    {
        if( p_sys->es[i]->p_pgrm == p_sys->p_pgrm )
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            EsOutESVarUpdate( out, p_sys->es[i], false );
        EsOutSelect( out, p_sys->es[i], false );
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    }

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    /* Update now playing */
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    input_item_SetNowPlaying( p_input->p->p_item, p_pgrm->psz_now_playing );
    input_item_SetPublisher( p_input->p->p_item, p_pgrm->psz_publisher );
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    input_SendEventMeta( p_input );
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}

/* EsOutAddProgram:
 *  Add a program
 */
static es_out_pgrm_t *EsOutProgramAdd( es_out_t *out, int i_group )
{
    es_out_sys_t      *p_sys = out->p_sys;
    input_thread_t    *p_input = p_sys->p_input;

    es_out_pgrm_t *p_pgrm = malloc( sizeof( es_out_pgrm_t ) );
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    if( !p_pgrm )
        return NULL;
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    /* Init */
    p_pgrm->i_id = i_group;
    p_pgrm->i_es = 0;
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    p_pgrm->b_selected = false;
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    p_pgrm->psz_name = NULL;
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    p_pgrm->psz_now_playing = NULL;
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    p_pgrm->psz_publisher = NULL;
    p_pgrm->p_epg = NULL;
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    p_pgrm->p_clock = input_clock_New( p_input->p->i_cr_average, p_sys->i_rate );
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    if( !p_pgrm->p_clock )
    {
        free( p_pgrm );
        return NULL;
    }
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    /* Append it */
    TAB_APPEND( p_sys->i_pgrm, p_sys->pgrm, p_pgrm );

    /* Update "program" variable */
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    input_SendEventProgramAdd( p_input, i_group, NULL );
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    if( i_group == var_GetInteger( p_input, "program" ) )
        EsOutProgramSelect( out, p_pgrm );
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    return p_pgrm;
}

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/* EsOutDelProgram:
 *  Delete a program
 */
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static int EsOutProgramDel( es_out_t *out, int i_group )
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{
    es_out_sys_t      *p_sys = out->p_sys;
    input_thread_t    *p_input = p_sys->p_input;
    es_out_pgrm_t     *p_pgrm = NULL;
    int               i;

    for( i = 0; i < p_sys->i_pgrm; i++ )
    {
        if( p_sys->pgrm[i]->i_id == i_group )
        {
            p_pgrm = p_sys->pgrm[i];
            break;
        }
    }

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    if( p_pgrm == NULL )
        return VLC_EGENERIC;
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    if( p_pgrm->i_es )
    {
        msg_Dbg( p_input, "can't delete program %d which still has %i ES",
                 i_group, p_pgrm->i_es );
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        return VLC_EGENERIC;
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    }

    TAB_REMOVE( p_sys->i_pgrm, p_sys->pgrm, p_pgrm );

    /* If program is selected we need to unselect it */
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    if( p_sys->p_pgrm == p_pgrm )
        p_sys->p_pgrm = NULL;

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    input_clock_Delete( p_pgrm->p_clock );
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    free( p_pgrm->psz_name );
    free( p_pgrm->psz_now_playing );
    free( p_pgrm->psz_publisher );
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    if( p_pgrm->p_epg )
        vlc_epg_Delete( p_pgrm->p_epg );
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    free( p_pgrm );

    /* Update "program" variable */
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    input_SendEventProgramDel( p_input, i_group );
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    return VLC_SUCCESS;
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}

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/* EsOutProgramMeta:
 */
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static char *EsOutProgramGetMetaName( es_out_pgrm_t *p_pgrm )
{
    char *psz = NULL;
    if( p_pgrm->psz_name )
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    {
        if( asprintf( &psz, _("%s [%s %d]"), p_pgrm->psz_name, _("Program"), p_pgrm->i_id ) == -1 )
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            return NULL;
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    }
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    else
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    {
        if( asprintf( &psz, "%s %d", _("Program"), p_pgrm->i_id ) == -1 )
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            return NULL;
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    }
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    return psz;
}

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static void EsOutProgramMeta( es_out_t *out, int i_group, vlc_meta_t *p_meta )
{
    es_out_sys_t      *p_sys = out->p_sys;
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    es_out_pgrm_t     *p_pgrm = NULL;
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    input_thread_t    *p_input = p_sys->p_input;
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    char              *psz_cat;
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    const char        *psz_title = NULL;
    const char        *psz_provider = NULL;
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    int i;

    msg_Dbg( p_input, "EsOutProgramMeta: number=%d", i_group );
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    /* Check against empty meta data (empty for what we handle) */
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    if( !vlc_meta_Get( p_meta, vlc_meta_Title) &&
        !vlc_meta_Get( p_meta, vlc_meta_NowPlaying) &&
        !vlc_meta_Get( p_meta, vlc_meta_Publisher) &&
        vlc_dictionary_keys_count( &p_meta->extra_tags ) <= 0 )
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    {
        return;
    }
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    /* Find program */
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    for( i = 0; i < p_sys->i_pgrm; i++ )
    {
        if( p_sys->pgrm[i]->i_id == i_group )
        {
            p_pgrm = p_sys->pgrm[i];
            break;
        }
    }
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    if( p_pgrm == NULL )
        p_pgrm = EsOutProgramAdd( out, i_group );   /* Create it */
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    /* */
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    psz_title = vlc_meta_Get( p_meta, vlc_meta_Title);
    psz_provider = vlc_meta_Get( p_meta, vlc_meta_Publisher);
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    /* Update the description text of the program */
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    if( psz_title && *psz_title )
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    {
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        if( !p_pgrm->psz_name || strcmp( p_pgrm->psz_name, psz_title ) )
        {
            char *psz_cat = EsOutProgramGetMetaName( p_pgrm );

            /* Remove old entries */
            input_Control( p_input, INPUT_DEL_INFO, psz_cat, NULL );
            /* TODO update epg name */
            free( psz_cat );
        }
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        free( p_pgrm->psz_name );
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        p_pgrm->psz_name = strdup( psz_title );

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        char *psz_text;
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        if( psz_provider && *psz_provider )
        {
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            if( asprintf( &psz_text, "%s [%s]", psz_title, psz_provider ) < 0 )
                psz_text = NULL;
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        }
        else
        {
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            psz_text = strdup( psz_title );
        }

        /* ugly but it works */
        if( psz_text )
        {
            input_SendEventProgramDel( p_input, i_group );
            input_SendEventProgramAdd( p_input, i_group, psz_text );

            free( psz_text );
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        }
    }

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    psz_cat = EsOutProgramGetMetaName( p_pgrm );
    if( psz_provider )
    {
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        if( p_sys->p_pgrm == p_pgrm )
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        {
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            input_item_SetPublisher( p_input->p->p_item, psz_provider );
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            input_SendEventMeta( p_input );
        }
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        input_Control( p_input, INPUT_ADD_INFO, psz_cat, input_MetaTypeToLocalizedString(vlc_meta_Publisher), psz_provider );
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    }
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    char ** ppsz_all_keys = vlc_dictionary_all_keys( &p_meta->extra_tags );
    for( i = 0; ppsz_all_keys[i]; i++ )
    {
        input_Control( p_input, INPUT_ADD_INFO, psz_cat, _(ppsz_all_keys[i]),
                       vlc_dictionary_value_for_key( &p_meta->extra_tags, ppsz_all_keys[i] ) );
        free( ppsz_all_keys[i] );
    }
    free( ppsz_all_keys );
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    free( psz_cat );
}

static void vlc_epg_Merge( vlc_epg_t *p_dst, const vlc_epg_t *p_src )
{
    int i;

    /* Add new event */
    for( i = 0; i < p_src->i_event; i++ )
    {
        vlc_epg_event_t *p_evt = p_src->pp_event[i];
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        bool b_add = true;
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        int j;

        for( j = 0; j < p_dst->i_event; j++ )
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        {
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            if( p_dst->pp_event[j]->i_start == p_evt->i_start && p_dst->pp_event[j]->i_duration == p_evt->i_duration )
            {
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                b_add = false;
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                break;
            }
            if( p_dst->pp_event[j]->i_start > p_evt->i_start )
                break;
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        }
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        if( b_add )
        {
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            vlc_epg_event_t *p_copy = calloc( 1, sizeof(vlc_epg_event_t) );
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            if( !p_copy )
                break;
            p_copy->i_start = p_evt->i_start;
            p_copy->i_duration = p_evt->i_duration;
            p_copy->psz_name = p_evt->psz_name ? strdup( p_evt->psz_name ) : NULL;
            p_copy->psz_short_description = p_evt->psz_short_description ? strdup( p_evt->psz_short_description ) : NULL;
            p_copy->psz_description = p_evt->psz_description ? strdup( p_evt->psz_description ) : NULL;
            TAB_INSERT( p_dst->i_event, p_dst->pp_event, p_copy, j );
        }
    }
    /* Update current */
    vlc_epg_SetCurrent( p_dst, p_src->p_current ? p_src->p_current->i_start : -1 );

    /* Keep only 1 old event  */
    if( p_dst->p_current )
    {
        while( p_dst->i_event > 1 && p_dst->pp_event[0] != p_dst->p_current && p_dst->pp_event[1] != p_dst->p_current )
            TAB_REMOVE( p_dst->i_event, p_dst->pp_event, p_dst->pp_event[0] );
    }
}

static void EsOutProgramEpg( es_out_t *out, int i_group, vlc_epg_t *p_epg )
{
    es_out_sys_t      *p_sys = out->p_sys;
    input_thread_t    *p_input = p_sys->p_input;
    es_out_pgrm_t     *p_pgrm = NULL;
    char *psz_cat;
    int i;

    /* Find program */
    for( i = 0; i < p_sys->i_pgrm; i++ )
    {
        if( p_sys->pgrm[i]->i_id == i_group )
        {
            p_pgrm = p_sys->pgrm[i];
            break;
        }
    }
    if( p_pgrm == NULL )
        p_pgrm = EsOutProgramAdd( out, i_group );   /* Create it */

    /* Merge EPG */
    if( !p_pgrm->p_epg )
        p_pgrm->p_epg = vlc_epg_New( p_pgrm->psz_name );
    vlc_epg_Merge( p_pgrm->p_epg, p_epg );

    /* Update info */
    psz_cat = EsOutProgramGetMetaName( p_pgrm );
#ifdef HAVE_LOCALTIME_R
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    char *psz_epg;
    if( asprintf( &psz_epg, "EPG %s", psz_cat ) == -1 )
        psz_epg = NULL;
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    input_Control( p_input, INPUT_DEL_INFO, psz_epg, NULL );
    msg_Dbg( p_input, "EsOutProgramEpg: number=%d name=%s", i_group, p_pgrm->p_epg->psz_name );
    for( i = 0; i < p_pgrm->p_epg->i_event; i++ )
    {
        const vlc_epg_event_t *p_evt = p_pgrm->p_epg->pp_event[i];
        time_t t_start = (time_t)p_evt->i_start;
        struct tm tm_start;
        char psz_start[128];

        localtime_r( &t_start, &tm_start );

        snprintf( psz_start, sizeof(psz_start), "%2.2d:%2.2d:%2.2d", tm_start.tm_hour, tm_start.tm_min, tm_start.tm_sec );
        if( p_evt->psz_short_description || p_evt->psz_description )
            input_Control( p_input, INPUT_ADD_INFO, psz_epg, psz_start, "%s (%2.2d:%2.2d) - %s",
                           p_evt->psz_name,
                           p_evt->i_duration/60/60, (p_evt->i_duration/60)%60,
                           p_evt->psz_short_description ? p_evt->psz_short_description : p_evt->psz_description );
        else
            input_Control( p_input, INPUT_ADD_INFO, psz_epg, psz_start, "%s (%2.2d:%2.2d)",
                           p_evt->psz_name,
                           p_evt->i_duration/60/60, (p_evt->i_duration/60)%60 );
    }
    free( psz_epg );
#endif
    /* Update now playing */
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    free( p_pgrm->psz_now_playing );
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    p_pgrm->psz_now_playing = NULL;
    if( p_epg->p_current && p_epg->p_current->psz_name && *p_epg->p_current->psz_name )
        p_pgrm->psz_now_playing = strdup( p_epg->p_current->psz_name );
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    if( p_pgrm == p_sys->p_pgrm )
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    {
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        input_item_SetNowPlaying( p_input->p->p_item, p_pgrm->psz_now_playing );
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        input_SendEventMeta( p_input );
    }
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    if( p_pgrm->psz_now_playing )
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    {
        input_Control( p_input, INPUT_ADD_INFO, psz_cat,
            input_MetaTypeToLocalizedString(vlc_meta_NowPlaying),
            p_pgrm->psz_now_playing );
    }
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    else
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    {
        input_Control( p_input, INPUT_DEL_INFO, psz_cat,
            input_MetaTypeToLocalizedString(vlc_meta_NowPlaying) );
    }
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    free( psz_cat );
}

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/* EsOutAdd:
 *  Add an es_out
 */
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static es_out_id_t *EsOutAdd( es_out_t *out, const es_format_t *fmt )
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{
    es_out_sys_t      *p_sys = out->p_sys;
    input_thread_t    *p_input = p_sys->p_input;

    if( fmt->i_group < 0 )
    {
        msg_Err( p_input, "invalid group number" );
        return NULL;
    }

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    es_out_id_t       *es = malloc( sizeof( *es ) );
    es_out_pgrm_t     *p_pgrm = NULL;
    int i;

    if( !es )
        return NULL;

    vlc_mutex_lock( &p_sys->lock );

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    /* Search the program */
    for( i = 0; i < p_sys->i_pgrm; i++ )
    {
        if( fmt->i_group == p_sys->pgrm[i]->i_id )
        {
            p_pgrm = p_sys->pgrm[i];
            break;
        }
    }
    if( p_pgrm == NULL )
    {
        /* Create a new one */
        p_pgrm = EsOutProgramAdd( out, fmt->i_group );
    }

    /* Increase ref count for program */
    p_pgrm->i_es++;

    /* Set up ES */
    es->p_pgrm = p_pgrm;
    es_format_Copy( &es->fmt, fmt );