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310 lines
8.6 KiB
310 lines
8.6 KiB
/*****************************************************************************
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* equalizer.c
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*****************************************************************************
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* Copyright (C) 2011 VideoLAN and VLC authors
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*
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* Authors: Akash Mehrotra < mehrotra <dot> akash <at> gmail <dot> com >
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* 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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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include <vlc_aout.h>
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#include <vlc_charset.h>
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#include <vlc_playlist.h>
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#include <vlc_player.h>
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#include "input.h"
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#include "../libs.h"
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#include "../vlc.h"
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#include "../../audio_filter/equalizer_presets.h"
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#if !defined _WIN32
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# include <locale.h>
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#else
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# include <windows.h>
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#endif
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#ifdef __APPLE__
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# include <string.h>
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# include <xlocale.h>
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#endif
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/*****************************************************************************
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* Get the preamp level
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*****************************************************************************/
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static int vlclua_preamp_get( lua_State *L )
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{
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audio_output_t *p_aout = vlclua_get_aout_internal(L);
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if( p_aout == NULL )
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return 0;
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char *psz_af = var_GetNonEmptyString( p_aout, "audio-filter" );
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if( !psz_af || strstr ( psz_af, "equalizer" ) == NULL )
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{
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free( psz_af );
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aout_Release(p_aout);
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return 0;
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}
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free( psz_af );
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lua_pushnumber( L, var_GetFloat( p_aout, "equalizer-preamp") );
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aout_Release(p_aout);
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return 1;
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}
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/*****************************************************************************
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* Set the preamp level
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*****************************************************************************/
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static int vlclua_preamp_set( lua_State *L )
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{
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audio_output_t *p_aout = vlclua_get_aout_internal(L);
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if( p_aout == NULL )
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return 0;
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char *psz_af = var_GetNonEmptyString( p_aout, "audio-filter" );
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if( !psz_af || strstr ( psz_af, "equalizer" ) == NULL )
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{
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free( psz_af );
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aout_Release(p_aout);
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return 0;
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}
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free( psz_af );
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var_SetFloat( p_aout, "equalizer-preamp", luaL_checknumber( L, 1 ) );
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aout_Release(p_aout);
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return 1;
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}
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/*****************************************************************************
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Bands:
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Band 0: 60 Hz
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Band 1: 170 Hz
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Band 2: 310 Hz
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Band 3: 600 Hz
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Band 4: 1 kHz
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Band 5: 3 kHz
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Band 6: 6 kHz
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Band 7: 12 kHz
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Band 8: 14 kHz
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Band 9: 16 kHz
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*****************************************************************************/
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/*****************************************************************************
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* Return EQ level for all bands as a Table
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*****************************************************************************/
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static int vlclua_equalizer_get( lua_State *L )
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{
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const unsigned bands = 10;
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audio_output_t *p_aout = vlclua_get_aout_internal(L);
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if( p_aout == NULL )
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return 0;
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char *psz_af = var_GetNonEmptyString( p_aout, "audio-filter" );
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if( !psz_af || strstr ( psz_af, "equalizer" ) == NULL )
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{
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free( psz_af );
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aout_Release(p_aout);
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return 0;
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}
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free( psz_af );
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char *psz_bands_origin, *psz_bands;
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psz_bands_origin = psz_bands = var_GetNonEmptyString( p_aout, "equalizer-bands" );
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if( !psz_bands )
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{
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aout_Release(p_aout);
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return 0;
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}
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bool error = false;
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locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
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locale_t oldloc = uselocale (loc);
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lua_newtable( L );
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for( unsigned i = 0; i < bands; i++ )
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{
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float level = strtof( psz_bands, &psz_bands );
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char *str;
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if( asprintf( &str , "%f" , level ) == -1 )
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{
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error = true;
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break;
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}
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lua_pushstring( L, str );
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free(str);
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if( asprintf( &str , "band id=\"%u\"", i ) == -1 )
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{
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error = true;
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break;
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}
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lua_setfield( L , -2 , str );
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free( str );
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}
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free( psz_bands_origin );
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if( loc != (locale_t)0 )
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{
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uselocale (oldloc);
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freelocale (loc);
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}
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aout_Release(p_aout);
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return error ? 0 : 1;
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}
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/*****************************************************************************
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* Set the equalizer level for the specified band
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*****************************************************************************/
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static int vlclua_equalizer_set( lua_State *L )
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{
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int bandid = luaL_checknumber( L, 1 );
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if( bandid < 0 || bandid > 9)
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return 0;
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audio_output_t *p_aout = vlclua_get_aout_internal(L);
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if( p_aout == NULL )
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return 0;
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char *psz_af = var_GetNonEmptyString( p_aout, "audio-filter" );
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if( !psz_af || strstr ( psz_af, "equalizer" ) == NULL )
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{
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free( psz_af );
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aout_Release(p_aout);
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return 0;
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}
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free( psz_af );
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float level = luaL_checknumber( L, 2 );
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char *bands = var_GetString( p_aout, "equalizer-bands" );
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locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
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locale_t oldloc = uselocale (loc);
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char *b = bands;
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while( bandid > 0 )
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{
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float dummy = strtof( b, &b );
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(void)dummy;
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bandid--;
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}
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if( *b != '\0' )
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*b++ = '\0';
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float dummy = strtof( b, &b );
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(void)dummy;
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char *newstr;
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if( asprintf( &newstr, "%s %.1f%s", bands, level, b ) != -1 )
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{
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var_SetString( p_aout, "equalizer-bands", newstr );
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free( newstr );
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}
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if( loc != (locale_t)0 )
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{
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uselocale (oldloc);
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freelocale (loc);
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}
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free( bands );
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aout_Release(p_aout);
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return 0;
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}
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/*****************************************************************************
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* Set the preset specified by preset id
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*****************************************************************************/
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static int vlclua_equalizer_setpreset( lua_State *L )
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{
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int presetid = luaL_checknumber( L, 1 );
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if( presetid >= NB_PRESETS || presetid < 0 )
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return 0;
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audio_output_t *p_aout = vlclua_get_aout_internal(L);
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if( p_aout == NULL )
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return 0;
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int ret = 0;
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char *psz_af = var_InheritString( p_aout, "audio-filter" );
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if( psz_af != NULL && strstr ( psz_af, "equalizer" ) != NULL )
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{
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var_SetString( p_aout , "equalizer-preset" , preset_list[presetid] );
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ret = 1;
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}
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free( psz_af );
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aout_Release(p_aout);
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return ret;
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}
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/****************************************************************************
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* Enable/disable Equalizer
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*****************************************************************************/
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static int vlclua_equalizer_enable(lua_State *L)
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{
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bool state = luaL_checkboolean(L , 1);
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audio_output_t *aout = vlclua_get_aout_internal(L);
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if (aout)
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{
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aout_EnableFilter(aout, "equalizer", state);
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aout_Release (aout);
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}
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return 0;
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}
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/*****************************************************************************
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* Get preset names
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*****************************************************************************/
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static int vlclua_equalizer_get_presets( lua_State *L )
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{
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lua_newtable( L );
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char *str;
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for( int i = 0 ; i < NB_PRESETS ; i++ )
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{
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lua_pushstring( L, preset_list_text[i] );
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if( asprintf( &str , "preset id=\"%d\"",i ) == -1 )
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return 0;
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lua_setfield( L , -2 , str );
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free(str);
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}
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return 1;
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}
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static const luaL_Reg vlclua_equalizer_reg[] = {
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{ "preampget", vlclua_preamp_get },
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{ "preampset", vlclua_preamp_set },
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{ "equalizerget", vlclua_equalizer_get },
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{ "equalizerset", vlclua_equalizer_set },
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{ "enable", vlclua_equalizer_enable },
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{ "presets",vlclua_equalizer_get_presets },
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{ "setpreset", vlclua_equalizer_setpreset },
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{ NULL, NULL }
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};
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void luaopen_equalizer( lua_State *L )
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{
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lua_newtable( L );
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luaL_register( L, NULL, vlclua_equalizer_reg );
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lua_setfield( L, -2, "equalizer" );
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}
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