vlm.c

VLC Player Source Code

/*****************************************************************************
 * vlm.c: VLM interface plugin
 *****************************************************************************
 * Copyright (C) 2000-2005 the VideoLAN team
 * $Id: 4a92e60baa6b967ac9a94e2ca71fcda5db430226 $
 *
 * Authors: Simon Latapie <[e-mail]>
 *          Laurent Aimar <[e-mail]>
 *          Gildas Bazin <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

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

#include <vlc_common.h>

#include <stdio.h>
#include <ctype.h>                                              /* tolower() */
#include <assert.h>

#include <vlc_vlm.h>

#ifndef WIN32
#   include <sys/time.h>                                   /* gettimeofday() */
#endif

#ifdef HAVE_TIME_H
#   include <time.h>                                              /* ctime() */
#   include <sys/timeb.h>                                         /* ftime() */
#endif

#include <vlc_input.h>
#include "input_internal.h"
#include <vlc_stream.h>
#include "vlm_internal.h"
#include <vlc_vod.h>
#include <vlc_charset.h>
#include <vlc_sout.h>
#include "../stream_output/stream_output.h"
#include "../libvlc.h"

/*****************************************************************************
 * Local prototypes.
 *****************************************************************************/

static void vlm_Destructor( vlm_t *p_vlm );
static void* Manage( vlc_object_t * );
static int vlm_MediaVodControl( void *, vod_media_t *, const char *, int, va_list );

/*****************************************************************************
 * vlm_New:
 *****************************************************************************/
vlm_t *__vlm_New ( vlc_object_t *p_this )
{
    vlc_value_t lockval;
    vlm_t *p_vlm = NULL, **pp_vlm = &(libvlc_priv (p_this->p_libvlc)->p_vlm);
    char *psz_vlmconf;
    static const char vlm_object_name[] = "vlm daemon";

    /* Avoid multiple creation */
    if( var_Create( p_this->p_libvlc, "vlm_mutex", VLC_VAR_MUTEX ) ||
        var_Get( p_this->p_libvlc, "vlm_mutex", &lockval ) )
        return NULL;

    vlc_mutex_lock( lockval.p_address );

    p_vlm = *pp_vlm;
    if( p_vlm )
    {   /* VLM already exists */
        vlc_object_yield( p_vlm );
        vlc_mutex_unlock( lockval.p_address );
        return p_vlm;
    }

    msg_Dbg( p_this, "creating VLM" );

    p_vlm = vlc_custom_create( p_this, sizeof( *p_vlm ), VLC_OBJECT_GENERIC,
                               vlm_object_name );
    if( !p_vlm )
    {
        vlc_mutex_unlock( lockval.p_address );
        return NULL;
    }

    vlc_mutex_init( &p_vlm->lock );
    p_vlm->i_id = 1;
    TAB_INIT( p_vlm->i_media, p_vlm->media );
    TAB_INIT( p_vlm->i_schedule, p_vlm->schedule );
    p_vlm->i_vod = 0;
    p_vlm->p_vod = NULL;
    vlc_object_attach( p_vlm, p_this->p_libvlc );

    if( vlc_thread_create( p_vlm, "vlm thread",
                           Manage, VLC_THREAD_PRIORITY_LOW, false ) )
    {
        vlc_mutex_destroy( &p_vlm->lock );
        vlc_object_release( p_vlm );
        return NULL;
    }

    /* Load our configuration file */
    psz_vlmconf = var_CreateGetString( p_vlm, "vlm-conf" );
    if( psz_vlmconf && *psz_vlmconf )
    {
        vlm_message_t *p_message = NULL;
        char *psz_buffer = NULL;

        msg_Dbg( p_this, "loading VLM configuration" );
        if( asprintf(&psz_buffer, "load %s", psz_vlmconf ) != -1 )
        {
            msg_Dbg( p_this, "%s", psz_buffer );
            if( vlm_ExecuteCommand( p_vlm, psz_buffer, &p_message ) )
                msg_Warn( p_this, "error while loading the configuration file" );

            vlm_MessageDelete( p_message );
            free( psz_buffer );
        }
    }
    free( psz_vlmconf );

    vlc_object_set_destructor( p_vlm, (vlc_destructor_t)vlm_Destructor );
    *pp_vlm = p_vlm; /* for future reference */
    vlc_mutex_unlock( lockval.p_address );

    return p_vlm;
}

/*****************************************************************************
 * vlm_Delete:
 *****************************************************************************/
void vlm_Delete( vlm_t *p_vlm )
{
    vlc_value_t lockval;

    /* vlm_Delete() is serialized against itself, and against vlm_New().
     * This way, vlm_Destructor () (called from vlc_objet_release() above)
     * is serialized against setting libvlc_priv->p_vlm from vlm_New(). */
    var_Get( p_vlm->p_libvlc, "vlm_mutex", &lockval );
    vlc_mutex_lock( lockval.p_address );
    /* Parental advisory: terrific humongous horrible follows...
     * This is so that vlc_object_destroy() (from vlc_object_release()) will
     * NOT join our thread. See also vlm_Destructor().
     * -- Courmisch, 24/08/2008 */
    vlc_internals( p_vlm )->b_thread = false;
    vlc_object_release( p_vlm );
    vlc_mutex_unlock( lockval.p_address );
}

/*****************************************************************************
 * vlm_Destructor:
 *****************************************************************************/
static void vlm_Destructor( vlm_t *p_vlm )
{
    libvlc_priv (p_vlm->p_libvlc)->p_vlm = NULL;

    vlm_ControlInternal( p_vlm, VLM_CLEAR_MEDIAS );
    TAB_CLEAN( p_vlm->i_media, p_vlm->media );

    vlm_ControlInternal( p_vlm, VLM_CLEAR_SCHEDULES );
    TAB_CLEAN( p_vlm->schedule, p_vlm->schedule );

    vlc_object_kill( p_vlm );
    /* Continuation of the vlm_Delete() hack. -- Courmisch */
    vlc_internals( p_vlm )->b_thread = true;
    vlc_thread_join( p_vlm );
    vlc_mutex_destroy( &p_vlm->lock );
}

/*****************************************************************************
 * vlm_ExecuteCommand:
 *****************************************************************************/
int vlm_ExecuteCommand( vlm_t *p_vlm, const char *psz_command,
                        vlm_message_t **pp_message)
{
    int i_result;

    vlc_mutex_lock( &p_vlm->lock );
    i_result = ExecuteCommand( p_vlm, psz_command, pp_message );
    vlc_mutex_unlock( &p_vlm->lock );

    return i_result;
}


int64_t vlm_Date(void)
{
#ifdef WIN32
    struct timeb tm;
    ftime( &tm );
    return ((int64_t)tm.time) * 1000000 + ((int64_t)tm.millitm) * 1000;
#else
    struct timeval tv_date;

    /* gettimeofday() cannot fail given &tv_date is a valid address */
    (void)gettimeofday( &tv_date, NULL );
    return (mtime_t) tv_date.tv_sec * 1000000 + (mtime_t) tv_date.tv_usec;
#endif
}


/*****************************************************************************
 *
 *****************************************************************************/
static int vlm_MediaVodControl( void *p_private, vod_media_t *p_vod_media,
                                const char *psz_id, int i_query, va_list args )
{
    vlm_t *vlm = (vlm_t *)p_private;
    int i, i_ret;
    const char *psz;
    int64_t id;

    if( !p_private || !p_vod_media )
        return VLC_EGENERIC;

    vlc_mutex_lock( &vlm->lock );

    /* Find media id */
    for( i = 0, id = -1; i < vlm->i_media; i++ )
    {
        if( p_vod_media == vlm->media[i]->vod.p_media )
        {
            id = vlm->media[i]->cfg.id;
            break;
        }
    }
    if( id == -1 )
    {
        vlc_mutex_unlock( &vlm->lock );
        return VLC_EGENERIC;
    }

    switch( i_query )
    {
    case VOD_MEDIA_PLAY:
        psz = (const char *)va_arg( args, const char * );
        i_ret = vlm_ControlInternal( vlm, VLM_START_MEDIA_VOD_INSTANCE, id, psz_id, 0, psz );
        break;

    case VOD_MEDIA_PAUSE:
        i_ret = vlm_ControlInternal( vlm, VLM_PAUSE_MEDIA_INSTANCE, id, psz_id );
        break;

    case VOD_MEDIA_STOP:
        i_ret = vlm_ControlInternal( vlm, VLM_STOP_MEDIA_INSTANCE, id, psz_id );
        break;

    case VOD_MEDIA_SEEK:
    {
        double d_position = (double)va_arg( args, double );
        i_ret = vlm_ControlInternal( vlm, VLM_SET_MEDIA_INSTANCE_POSITION, id, psz_id, d_position/100.0 );
        break;
    }

    case VOD_MEDIA_REWIND:
    {
        double d_scale = (double)va_arg( args, double );
        double d_position;

        vlm_ControlInternal( vlm, VLM_GET_MEDIA_INSTANCE_POSITION, id, psz_id, &d_position );
        d_position -= (d_scale / 1000.0);
        if( d_position < 0.0 )
            d_position = 0.0;
        i_ret = vlm_ControlInternal( vlm, VLM_SET_MEDIA_INSTANCE_POSITION, id, psz_id, d_position );
        break;
    }

    case VOD_MEDIA_FORWARD:
    {
        double d_scale = (double)va_arg( args, double );
        double d_position;

        vlm_ControlInternal( vlm, VLM_GET_MEDIA_INSTANCE_POSITION, id, psz_id, &d_position );
        d_position += (d_scale / 1000.0);
        if( d_position > 1.0 )
            d_position = 1.0;
        i_ret = vlm_ControlInternal( vlm, VLM_SET_MEDIA_INSTANCE_POSITION, id, psz_id, d_position );
        break;
    }

    default:
        i_ret = VLC_EGENERIC;
        break;
    }

    vlc_mutex_unlock( &vlm->lock );

    return i_ret;
}


/*****************************************************************************
 * Manage:
 *****************************************************************************/
static void* Manage( vlc_object_t* p_object )
{
    vlm_t *vlm = (vlm_t*)p_object;
    int i, j;
    mtime_t i_lastcheck;
    mtime_t i_time;

    i_lastcheck = vlm_Date();

    while( !vlm->b_die )
    {
        char **ppsz_scheduled_commands = NULL;
        int    i_scheduled_commands = 0;

        vlc_mutex_lock( &vlm->lock );

        /* destroy the inputs that wants to die, and launch the next input */
        for( i = 0; i < vlm->i_media; i++ )
        {
            vlm_media_sys_t *p_media = vlm->media[i];

            for( j = 0; j < p_media->i_instance; )
            {
                vlm_media_instance_sys_t *p_instance = p_media->instance[j];

                if( p_instance->p_input && ( p_instance->p_input->b_eof || p_instance->p_input->b_error ) )
                {
                    int i_new_input_index;

                    /* */
                    i_new_input_index = p_instance->i_index + 1;
                    if( !p_media->cfg.b_vod && p_media->cfg.broadcast.b_loop && i_new_input_index >= p_media->cfg.i_input )
                        i_new_input_index = 0;

                    /* FIXME implement multiple input with VOD */
                    if( p_media->cfg.b_vod || i_new_input_index >= p_media->cfg.i_input )
                        vlm_ControlInternal( vlm, VLM_STOP_MEDIA_INSTANCE, p_media->cfg.id, p_instance->psz_name );
                    else
                        vlm_ControlInternal( vlm, VLM_START_MEDIA_BROADCAST_INSTANCE, p_media->cfg.id, p_instance->psz_name, i_new_input_index );

                    j = 0;
                }
                else
                {
                    j++;
                }
            }
        }

        /* scheduling */
        i_time = vlm_Date();

        for( i = 0; i < vlm->i_schedule; i++ )
        {
            mtime_t i_real_date = vlm->schedule[i]->i_date;

            if( vlm->schedule[i]->b_enabled == true )
            {
                if( vlm->schedule[i]->i_date == 0 ) // now !
                {
                    vlm->schedule[i]->i_date = (i_time / 1000000) * 1000000 ;
                    i_real_date = i_time;
                }
                else if( vlm->schedule[i]->i_period != 0 )
                {
                    int j = 0;
                    while( vlm->schedule[i]->i_date + j *
                           vlm->schedule[i]->i_period <= i_lastcheck &&
                           ( vlm->schedule[i]->i_repeat > j ||
                             vlm->schedule[i]->i_repeat == -1 ) )
                    {
                        j++;
                    }

                    i_real_date = vlm->schedule[i]->i_date + j *
                        vlm->schedule[i]->i_period;