var.c

uclinux 下的vlc播放器源代码

/*****************************************************************************
 * var.c: object variables for input thread
 *****************************************************************************
 * Copyright (C) 2004 the VideoLAN team
 * $Id: var.c 13905 2006-01-12 23:10:04Z dionoea $
 *
 * Authors: Laurent Aimar <[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
 *****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/input.h>

#include "input_internal.h"

/*****************************************************************************
 * Exported prototypes
 *****************************************************************************/
void input_ControlVarInit ( input_thread_t * );
void input_ControlVarClean( input_thread_t * );
void input_ControlVarNavigation( input_thread_t * );
void input_ControlVarTitle( input_thread_t *p_input, int i_title );

void input_ConfigVarInit ( input_thread_t *p_input );

/*****************************************************************************
 * Callbacks
 *****************************************************************************/
static int StateCallback   ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int RateCallback    ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int PositionCallback( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int TimeCallback    ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int ProgramCallback ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int TitleCallback   ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int SeekpointCallback( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int NavigationCallback( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int ESCallback      ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );
static int EsDelayCallback ( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );

static int BookmarkCallback( vlc_object_t *p_this, char const *psz_cmd,
                             vlc_value_t oldval, vlc_value_t newval, void * );

/*****************************************************************************
 * input_ControlVarInit:
 *  Create all control object variables with their callbacks
 *****************************************************************************/
void input_ControlVarInit ( input_thread_t *p_input )
{
    vlc_value_t val, text;

    /* State */
    var_Create( p_input, "state", VLC_VAR_INTEGER );
    val.i_int = p_input->i_state;
    var_Change( p_input, "state", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "state", StateCallback, NULL );

    /* Rate */
    var_Create( p_input, "rate", VLC_VAR_INTEGER );
    val.i_int = p_input->i_rate;
    var_Change( p_input, "rate", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "rate", RateCallback, NULL );

    var_Create( p_input, "rate-slower", VLC_VAR_VOID );
    var_AddCallback( p_input, "rate-slower", RateCallback, NULL );

    var_Create( p_input, "rate-faster", VLC_VAR_VOID );
    var_AddCallback( p_input, "rate-faster", RateCallback, NULL );

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

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

    /* Bookmark */
    var_Create( p_input, "bookmark", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE |
                VLC_VAR_ISCOMMAND );
    val.psz_string = _("Bookmark");
    var_Change( p_input, "bookmark", VLC_VAR_SETTEXT, &val, NULL );
    var_AddCallback( p_input, "bookmark", BookmarkCallback, NULL );

    /* Program */
    var_Create( p_input, "program", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE |
                VLC_VAR_DOINHERIT );
    var_Get( p_input, "program", &val );
    if( val.i_int <= 0 )
        var_Change( p_input, "program", VLC_VAR_DELCHOICE, &val, NULL );
    text.psz_string = _("Program");
    var_Change( p_input, "program", VLC_VAR_SETTEXT, &text, NULL );
    var_AddCallback( p_input, "program", ProgramCallback, NULL );

    /* Programs */
    var_Create( p_input, "programs", VLC_VAR_LIST | VLC_VAR_DOINHERIT );
    text.psz_string = _("Programs");
    var_Change( p_input, "programs", VLC_VAR_SETTEXT, &text, NULL );

    /* Title */
    var_Create( p_input, "title", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
    text.psz_string = _("Title");
    var_Change( p_input, "title", VLC_VAR_SETTEXT, &text, NULL );
    var_AddCallback( p_input, "title", TitleCallback, NULL );

    /* Chapter */
    var_Create( p_input, "chapter", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
    text.psz_string = _("Chapter");
    var_Change( p_input, "chapter", VLC_VAR_SETTEXT, &text, NULL );
    var_AddCallback( p_input, "chapter", SeekpointCallback, NULL );

    /* Navigation The callback is added after */
    var_Create( p_input, "navigation", VLC_VAR_VARIABLE | VLC_VAR_HASCHOICE );
    text.psz_string = _("Navigation");
    var_Change( p_input, "navigation", VLC_VAR_SETTEXT, &text, NULL );

    /* Delay */
    var_Create( p_input, "audio-delay", VLC_VAR_TIME );
    val.i_time = 0;
    var_Change( p_input, "audio-delay", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "audio-delay", EsDelayCallback, NULL );
    var_Create( p_input, "spu-delay", VLC_VAR_TIME );
    val.i_time = 0;
    var_Change( p_input, "spu-delay", VLC_VAR_SETVALUE, &val, NULL );
    var_AddCallback( p_input, "spu-delay", EsDelayCallback, NULL );

    /* Video ES */
    var_Create( p_input, "video-es", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
    text.psz_string = _("Video Track");
    var_Change( p_input, "video-es", VLC_VAR_SETTEXT, &text, NULL );
    var_AddCallback( p_input, "video-es", ESCallback, NULL );

    /* Audio ES */
    var_Create( p_input, "audio-es", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
    text.psz_string = _("Audio Track");
    var_Change( p_input, "audio-es", VLC_VAR_SETTEXT, &text, NULL );
    var_AddCallback( p_input, "audio-es", ESCallback, NULL );

    /* Spu ES */
    var_Create( p_input, "spu-es", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
    text.psz_string = _("Subtitles Track");
    var_Change( p_input, "spu-es", VLC_VAR_SETTEXT, &text, NULL );
    var_AddCallback( p_input, "spu-es", ESCallback, NULL );

    /* Special read only objects variables for intf */
    var_Create( p_input, "bookmarks", VLC_VAR_STRING | VLC_VAR_DOINHERIT );

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

    /* Special "intf-change" variable, it allows intf to set up a callback
     * to be notified of some changes.
     * TODO list all changes warn by this callbacks */
    var_Create( p_input, "intf-change", VLC_VAR_BOOL );
    var_SetBool( p_input, "intf-change", VLC_TRUE );

   /* item-change variable */
    var_Create( p_input, "item-change", VLC_VAR_INTEGER );
}

/*****************************************************************************
 * input_ControlVarClean:
 *****************************************************************************/
void input_ControlVarClean( input_thread_t *p_input )
{
    var_Destroy( p_input, "state" );
    var_Destroy( p_input, "rate" );
    var_Destroy( p_input, "rate-slower" );
    var_Destroy( p_input, "rate-faster" );
    var_Destroy( p_input, "position" );
    var_Destroy( p_input, "position-offset" );
    var_Destroy( p_input, "time" );
    var_Destroy( p_input, "time-offset" );

    var_Destroy( p_input, "audio-delay" );
    var_Destroy( p_input, "spu-delay" );

    var_Destroy( p_input, "bookmark" );

    var_Destroy( p_input, "program" );
    if( p_input->i_title > 1 )
    {
        /* TODO Destroy sub navigation var ? */

        var_Destroy( p_input, "next-title" );
        var_Destroy( p_input, "prev-title" );
    }
    if( p_input->i_title > 0 )
    {
        /* FIXME title > 0 doesn't mean current title has more than 1 seekpoint */
        var_Destroy( p_input, "next-chapter" );
        var_Destroy( p_input, "prev-chapter" );
    }
    var_Destroy( p_input, "title" );
    var_Destroy( p_input, "chapter" );
    var_Destroy( p_input, "navigation" );

    var_Destroy( p_input, "video-es" );
    var_Destroy( p_input, "audio-es" );
    var_Destroy( p_input, "spu-es" );

    var_Destroy( p_input, "bookmarks" );
    var_Destroy( p_input, "length" );

    var_Destroy( p_input, "intf-change" );
 }

/*****************************************************************************
 * input_ControlVarNavigation:
 *  Create all remaining control object variables
 *****************************************************************************/
void input_ControlVarNavigation( input_thread_t *p_input )
{
    vlc_value_t val, text;
    int  i;

    /* Create more command variables */
    if( p_input->i_title > 1 )
    {
        var_Create( p_input, "next-title", VLC_VAR_VOID );
        text.psz_string = _("Next title");
        var_Change( p_input, "next-title", VLC_VAR_SETTEXT, &text, NULL );
        var_AddCallback( p_input, "next-title", TitleCallback, NULL );

        var_Create( p_input, "prev-title", VLC_VAR_VOID );
        text.psz_string = _("Previous title");
        var_Change( p_input, "prev-title", VLC_VAR_SETTEXT, &text, NULL );
        var_AddCallback( p_input, "prev-title", TitleCallback, NULL );
    }

    /* Create title and navigation */
    val.psz_string = malloc( sizeof("title ") + 5 );
    for( i = 0; i < p_input->i_title; i++ )
    {
        vlc_value_t val2, text, text2;
        int j;

        /* Add Navigation entries */
        sprintf( val.psz_string,  "title %2i", i );
        var_Destroy( p_input, val.psz_string );
        var_Create( p_input, val.psz_string,
                    VLC_VAR_INTEGER|VLC_VAR_HASCHOICE|VLC_VAR_ISCOMMAND );
        var_AddCallback( p_input, val.psz_string,
                         NavigationCallback, (void *)i );

        if( p_input->title[i]->psz_name == NULL ||
            *p_input->title[i]->psz_name == '\0' )
        {
            asprintf( &text.psz_string, _("Title %i"),
                      i + p_input->i_title_offset );
        }
        else
        {
            text.psz_string = strdup( p_input->title[i]->psz_name );
        }
        var_Change( p_input, "navigation", VLC_VAR_ADDCHOICE, &val, &text );

        /* Add title choice */
        val2.i_int = i;
        var_Change( p_input, "title", VLC_VAR_ADDCHOICE, &val2, &text );

        free( text.psz_string );

        for( j = 0; j < p_input->title[i]->i_seekpoint; j++ )
        {
            val2.i_int = j;

            if( p_input->title[i]->seekpoint[j]->psz_name == NULL ||
                *p_input->title[i]->seekpoint[j]->psz_name == '\0' )
            {
                /* Default value */
                asprintf( &text2.psz_string, _("Chapter %i"),
                          j + p_input->i_seekpoint_offset );
            }
            else
            {
                text2.psz_string =
                    strdup( p_input->title[i]->seekpoint[j]->psz_name );
            }

            var_Change( p_input, val.psz_string, VLC_VAR_ADDCHOICE,
                        &val2, &text2 );
            if( text2.psz_string ) free( text2.psz_string );
        }

    }
    free( val.psz_string );
}

/*****************************************************************************
 * input_ControlVarTitle:
 *  Create all variables for a title
 *****************************************************************************/
void input_ControlVarTitle( input_thread_t *p_input, int i_title )
{
    input_title_t *t = p_input->title[i_title];
    vlc_value_t val;
    int  i;

    /* Create/Destroy command variables */
    if( t->i_seekpoint <= 1 )
    {
        var_Destroy( p_input, "next-chapter" );
        var_Destroy( p_input, "prev-chapter" );
    }
    else if( var_Get( p_input, "next-chapter", &val ) != VLC_SUCCESS )
    {
        vlc_value_t text;

        var_Create( p_input, "next-chapter", VLC_VAR_VOID );
        text.psz_string = _("Next chapter");
        var_Change( p_input, "next-chapter", VLC_VAR_SETTEXT, &text, NULL );
        var_AddCallback( p_input, "next-chapter", SeekpointCallback, NULL );

        var_Create( p_input, "prev-chapter", VLC_VAR_VOID );
        text.psz_string = _("Previous chapter");
        var_Change( p_input, "prev-chapter", VLC_VAR_SETTEXT, &text, NULL );
        var_AddCallback( p_input, "prev-chapter", SeekpointCallback, NULL );
    }

    /* Build chapter list */
    var_Change( p_input, "chapter", VLC_VAR_CLEARCHOICES, NULL, NULL );