equalizer.m

VLC Player Source Code

/*****************************************************************************
 * equalizer.m: MacOS X interface module
 *****************************************************************************
 * Copyright (C) 2004-2008 the VideoLAN team
 * $Id: 78adadd89f881f6ebf56e8b2f5a47a3ab889a5f7 $
 *
 * Authors: Jérôme Decoodt <[e-mail]>
 *          Felix Paul Kühne <fkuehne -at- videolan -dot- org>
 *
 * 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 <vlc_aout.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, bool 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 )
    {
        p_object = (vlc_object_t *)pl_Yield( p_intf );
    }

    psz_string = var_GetNonEmptyString( 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
        {
            vlc_object_release( p_object );
            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 );
            vlc_object_release( p_object );
            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 = true;
        }
    }
    
    if( (BOOL)config_GetInt( p_object, "macosx-eq-keep" ) == YES )
    {
        /* save changed to config */
        config_PutPsz( p_object, "audio-filter", psz_string );

        /* save to vlcrc */
        config_SaveConfigFile( p_object, "main" );
    }
    
    free( psz_string );
    vlc_object_release( p_object );
}

static bool 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_t *)pl_Yield( p_intf );

    if( (BOOL)config_GetInt( p_intf, "macosx-eq-keep" ) == YES )
        psz_string = config_GetPsz( p_intf, "audio-filter" );

    if(! psz_string )
        psz_string = var_GetNonEmptyString( p_object, "audio-filter" );

    vlc_object_release( p_object );

    if( !psz_string ) return false;

    psz_parser = strstr( psz_string, psz_name );

    free( psz_string );

    if ( psz_parser )
        return true;
    else
        return false;
}

- (void)initStrings
{
    int i;
    [o_btn_equalizer setToolTip: _NS("Equalizer")];
    [o_ckb_2pass setTitle: _NS("2 Pass")];
    [o_ckb_2pass setToolTip: _NS("Apply the "
        "equalizer filter twice. The effect will be sharper.")];
    [o_ckb_enable setTitle: _NS("Enable")];
    [o_ckb_enable setToolTip: _NS("Enable the equalizer. Bands can be set "
        "manually or using 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")];

    [self initBandSliders];
}

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

    if( p_object == NULL )
        p_object = (vlc_object_t *)pl_Yield( p_intf );

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

    psz_bands = var_GetNonEmptyString( p_object, "equalizer-bands" );

    if( psz_bands == NULL )
        psz_bands = strdup( "0 0 0 0 0 0 0 0 0 0" );

    if( (BOOL)config_GetInt( p_intf, "macosx-eq-keep" ) == YES )
    {
        b_2p = (BOOL)config_GetInt( p_object, "equalizer-2pass" );
        f_preamp = config_GetFloat( p_object, "equalizer-preamp" );
    }
    else
    {
        b_2p = var_GetBool( p_object, "equalizer-2pass" );
        f_preamp = var_GetFloat( p_object, "equalizer-preamp" );
    }

    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 );
    [self setBandSlidersValues:f_band];

    /* Set the the checkboxes */
    [o_ckb_enable setState: b_enabled];

    [o_ckb_2pass setState: b_2p];        
}

- (IBAction)bandSliderUpdated:(id)sender
{
    intf_thread_t *p_intf = VLCIntf;
    vlc_object_t *p_object = vlc_object_find( p_intf,
                                              VLC_OBJECT_AOUT, FIND_ANYWHERE );

    if( p_object == NULL )
        p_object = (vlc_object_t *)pl_Yield( p_intf );

    char psz_values[102];
    memset( psz_values, 0, 102 );

    /* Write the new bands values */
    /* TODO: write a generic code instead of ten times the same thing */

    sprintf( psz_values, "%s %.1f", psz_values, [o_slider_band1 floatValue] );