equalizer.m

video linux conference

/*****************************************************************************
 * equalizer.m: MacOS X interface module
 *****************************************************************************
 * Copyright (C) 2004 VideoLAN
 * $Id: equalizer.m 10946 2005-05-09 18:59:11Z bigben $
 *
 * Authors: Jerome Decoodt <[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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <vlc/vlc.h>
#include <vlc/aout.h>
#include <aout_internal.h>

#include "intf.h"

#include <math.h>

#include "equalizer.h"
#include "../../audio_filter/equalizer_presets.h"

/*****************************************************************************
 * VLCEqualizer implementation 
 *****************************************************************************/
@implementation VLCEqualizer

static void ChangeFiltersString( intf_thread_t *p_intf,
                                 char *psz_name, vlc_bool_t b_add )
{
    char *psz_parser, *psz_string;
    int i;
    vlc_object_t *p_object = vlc_object_find( p_intf,
                                VLC_OBJECT_AOUT, FIND_ANYWHERE );
    aout_instance_t *p_aout = (aout_instance_t *)p_object;
    if( p_object == NULL )
        p_object = vlc_object_find( p_intf,
                                 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
    if( p_object == NULL )
        return;

    psz_string = var_GetString( p_object, "audio-filter" );

    if( !psz_string ) psz_string = strdup( "" );

    psz_parser = strstr( psz_string, psz_name );

    if( b_add )
    {
        if( !psz_parser )
        {
            psz_parser = psz_string;
            asprintf( &psz_string, ( *psz_string ) ? "%s,%s" : "%s%s",
                            psz_string, psz_name );
            free( psz_parser );
        }
        else
        {
            return;
        }
    }
    else
    {
        if( psz_parser )
        {
            memmove( psz_parser, psz_parser + strlen( psz_name ) +
                            ( *( psz_parser + strlen( psz_name ) ) == ',' ? 1 : 0 ),
                            strlen( psz_parser + strlen( psz_name ) ) + 1 );

            if( *( psz_string+strlen( psz_string ) - 1 ) == ',' )
            {
                *( psz_string+strlen( psz_string ) - 1 ) = '\0';
            }
         }
         else
         {
             free( psz_string );
             return;
         }
    }

    var_SetString( p_object, "audio-filter", psz_string );
    if( p_aout )
    {
        for( i = 0; i < p_aout->i_nb_inputs; i++ )
        {
            p_aout->pp_inputs[i]->b_restart = VLC_TRUE;
        }
    }
    free( psz_string );
    vlc_object_release( p_object );
}

static vlc_bool_t GetFiltersStatus( intf_thread_t *p_intf,
                                 char *psz_name )
{
    char *psz_parser, *psz_string;
    vlc_object_t *p_object = vlc_object_find( p_intf,
                                VLC_OBJECT_AOUT, FIND_ANYWHERE );
    if( p_object == NULL )
        p_object = vlc_object_find( p_intf,
                                 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
    if( p_object == NULL )
        return VLC_FALSE;

    psz_string = var_GetString( p_object, "audio-filter" );

    vlc_object_release( p_object );

    if( !psz_string ) return VLC_FALSE;

    psz_parser = strstr( psz_string, psz_name );

    free( psz_string );

    if ( psz_parser )
        return VLC_TRUE;
    else
        return VLC_FALSE;
}

- (void)initStrings
{
    int i;
    [o_btn_equalizer setToolTip: _NS("Equalizer")];
    [o_ckb_2pass setTitle: _NS("2 Pass")];
    [o_ckb_2pass setToolTip: _NS("If you enable this settting, the "
        "equalizer filter will be applied twice. The effect will be sharper.")];
    [o_ckb_enable setTitle: _NS("Enable")];
    [o_ckb_enable setToolTip: _NS("Enable the equalizer. You can either "
        "manually change the bands or use a preset.")];
    [o_fld_preamp setStringValue: _NS("Preamp")];

    [o_popup_presets removeAllItems];
    for( i = 0; i < 18 ; i++ )
    {
        [o_popup_presets insertItemWithTitle: _NS(preset_list_text[i]) atIndex: i];
    }
    [o_window setTitle: _NS("Equalizer")];

    [o_slider_band1 setFloatValue: 0];
    [o_slider_band2 setFloatValue: 0];
    [o_slider_band3 setFloatValue: 0];
    [o_slider_band4 setFloatValue: 0];
    [o_slider_band5 setFloatValue: 0];
    [o_slider_band6 setFloatValue: 0];
    [o_slider_band7 setFloatValue: 0];
    [o_slider_band8 setFloatValue: 0];
    [o_slider_band9 setFloatValue: 0];
    [o_slider_band10 setFloatValue: 0];

    [o_ckb_enable setState: NSOffState];
    [o_ckb_2pass setState: NSOffState];
}

- (void)equalizerUpdated
{
    intf_thread_t *p_intf = VLCIntf;
    float f_preamp, f_band[10];
    char *psz_bands, *psz_bands_init, *p_next;
    vlc_bool_t b_2p;
    int i;
    vlc_bool_t b_enabled = GetFiltersStatus( p_intf, "equalizer" );
    vlc_object_t *p_object = vlc_object_find( p_intf,
                                VLC_OBJECT_AOUT, FIND_ANYWHERE );

    if( p_object == NULL )
        p_object = vlc_object_find( p_intf,
                                 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
    if( p_object == NULL )
        return;

    var_Create( p_object, "equalizer-preamp", VLC_VAR_FLOAT |
                                                    VLC_VAR_DOINHERIT );
    var_Create( p_object, "equalizer-bands", VLC_VAR_STRING |
                                                    VLC_VAR_DOINHERIT );

    f_preamp = var_GetFloat( p_object, "equalizer-preamp" );
    psz_bands = var_GetString( p_object, "equalizer-bands" );

    if( !strcmp( psz_bands, "" ) )
        psz_bands = strdup( "0 0 0 0 0 0 0 0 0 0" );

    b_2p = var_GetBool( p_object, "equalizer-2pass" );

    vlc_object_release( p_object );

/* Set the preamp slider */
    [o_slider_preamp setFloatValue: f_preamp];

/* Set the bands slider */
    psz_bands_init = psz_bands;

    for( i = 0; i < 10; i++ )
    {
        /* Read dB -20/20 */
#ifdef HAVE_STRTOF
        f_band[i] = strtof( psz_bands, &p_next );
#else
        f_band[i] = (float)strtod( psz_bands, &p_next );
#endif
        if( !p_next || p_next == psz_bands ) break; /* strtof() failed */

        if( !*psz_bands ) break; /* end of line */
        psz_bands = p_next+1;
    }
    free( psz_bands_init );

    [o_slider_band1 setFloatValue: f_band[0]];
    [o_slider_band2 setFloatValue: f_band[1]];
    [o_slider_band3 setFloatValue: f_band[2]];
    [o_slider_band4 setFloatValue: f_band[3]];
    [o_slider_band5 setFloatValue: f_band[4]];
    [o_slider_band6 setFloatValue: f_band[5]];