/*****************************************************************************
* param_eq.c:
*****************************************************************************
- * Copyright © 2006 the VideoLAN team
+ * Copyright © 2006 VLC authors and VideoLAN
* $Id$
*
* Authors: Antti Huovilainen
* Sigmund A. Helberg <dnumgis@videolan.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
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 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.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser 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.
+ * You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
/*****************************************************************************
set_category( CAT_AUDIO )
set_subcategory( SUBCAT_AUDIO_AFILTER )
- add_float( "param-eq-lowf", 100, NULL, N_("Low freq (Hz)"),NULL, false )
- add_float_with_range( "param-eq-lowgain", 0, -20.0, 20.0, NULL,
+ add_float( "param-eq-lowf", 100, N_("Low freq (Hz)"),NULL, false )
+ add_float_with_range( "param-eq-lowgain", 0, -20.0, 20.0,
N_("Low freq gain (dB)"), NULL,false )
- add_float( "param-eq-highf", 10000, NULL, N_("High freq (Hz)"),NULL, false )
- add_float_with_range( "param-eq-highgain", 0, -20.0, 20.0, NULL,
+ add_float( "param-eq-highf", 10000, N_("High freq (Hz)"),NULL, false )
+ add_float_with_range( "param-eq-highgain", 0, -20.0, 20.0,
N_("High freq gain (dB)"),NULL,false )
- add_float( "param-eq-f1", 300, NULL, N_("Freq 1 (Hz)"),NULL, false )
- add_float_with_range( "param-eq-gain1", 0, -20.0, 20.0, NULL,
+ add_float( "param-eq-f1", 300, N_("Freq 1 (Hz)"),NULL, false )
+ add_float_with_range( "param-eq-gain1", 0, -20.0, 20.0,
N_("Freq 1 gain (dB)"), NULL,false )
- add_float_with_range( "param-eq-q1", 3, 0.1, 100.0, NULL,
+ add_float_with_range( "param-eq-q1", 3, 0.1, 100.0,
N_("Freq 1 Q"), NULL,false )
- add_float( "param-eq-f2", 1000, NULL, N_("Freq 2 (Hz)"),NULL, false )
- add_float_with_range( "param-eq-gain2", 0, -20.0, 20.0, NULL,
+ add_float( "param-eq-f2", 1000, N_("Freq 2 (Hz)"),NULL, false )
+ add_float_with_range( "param-eq-gain2", 0, -20.0, 20.0,
N_("Freq 2 gain (dB)"),NULL,false )
- add_float_with_range( "param-eq-q2", 3, 0.1, 100.0, NULL,
+ add_float_with_range( "param-eq-q2", 3, 0.1, 100.0,
N_("Freq 2 Q"),NULL,false )
- add_float( "param-eq-f3", 3000, NULL, N_("Freq 3 (Hz)"),NULL, false )
- add_float_with_range( "param-eq-gain3", 0, -20.0, 20.0, NULL,
+ add_float( "param-eq-f3", 3000, N_("Freq 3 (Hz)"),NULL, false )
+ add_float_with_range( "param-eq-gain3", 0, -20.0, 20.0,
N_("Freq 3 gain (dB)"),NULL,false )
- add_float_with_range( "param-eq-q3", 3, 0.1, 100.0, NULL,
+ add_float_with_range( "param-eq-q3", 3, 0.1, 100.0,
N_("Freq 3 Q"),NULL,false )
set_callbacks( Open, Close )
static int Open( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
- filter_sys_t *p_sys;
- bool b_fit = true;
unsigned i_samplerate;
- if( p_filter->fmt_in.audio.i_format != VLC_CODEC_FL32 ||
- p_filter->fmt_out.audio.i_format != VLC_CODEC_FL32 )
- {
- b_fit = false;
- p_filter->fmt_in.audio.i_format = VLC_CODEC_FL32;
- p_filter->fmt_out.audio.i_format = VLC_CODEC_FL32;
- msg_Warn( p_filter, "bad input or output format" );
- }
- if ( !AOUT_FMTS_SIMILAR( &p_filter->fmt_in.audio, &p_filter->fmt_out.audio ) )
- {
- b_fit = false;
- memcpy( &p_filter->fmt_out.audio, &p_filter->fmt_in.audio,
- sizeof(audio_sample_format_t) );
- msg_Warn( p_filter, "input and output formats are not similar" );
- }
-
- if ( ! b_fit )
- {
- return VLC_EGENERIC;
- }
-
/* Allocate structure */
- p_sys = p_filter->p_sys = malloc( sizeof( *p_sys ) );
+ filter_sys_t *p_sys = p_filter->p_sys = malloc( sizeof( *p_sys ) );
if( !p_sys )
return VLC_EGENERIC;
+ p_filter->fmt_in.audio.i_format = VLC_CODEC_FL32;
+ p_filter->fmt_out.audio = p_filter->fmt_in.audio;
p_filter->pf_audio_filter = DoWork;
p_sys->f_lowf = var_InheritFloat( p_this, "param-eq-lowf");
if (gainDB < -40) gainDB = -40;
if (gainDB > 40) gainDB = 40;
- A = pow(10, gainDB/40);
- w0 = 2*3.141593f*f0/Fs;
- alpha = sin(w0)/(2*Q);
+ A = powf(10, gainDB/40);
+ w0 = 2*((float)M_PI)*f0/Fs;
+ alpha = sinf(w0)/(2*Q);
b0 = 1 + alpha*A;
- b1 = -2*cos(w0);
+ b1 = -2*cosf(w0);
b2 = 1 - alpha*A;
a0 = 1 + alpha/A;
- a1 = -2*cos(w0);
+ a1 = -2*cosf(w0);
a2 = 1 - alpha/A;
// Store values to coeffs and normalize by 1/a0
if (gainDB < -40) gainDB = -40;
if (gainDB > 40) gainDB = 40;
- A = pow(10, gainDB/40);
+ A = powf(10, gainDB/40);
w0 = 2*3.141593f*f0/Fs;
- alpha = sin(w0)/2 * sqrt( (A + 1/A)*(1/slope - 1) + 2 );
+ alpha = sinf(w0)/2 * sqrtf( (A + 1/A)*(1/slope - 1) + 2 );
if (high)
{
- b0 = A*( (A+1) + (A-1)*cos(w0) + 2*sqrt(A)*alpha );
- b1 = -2*A*( (A-1) + (A+1)*cos(w0) );
- b2 = A*( (A+1) + (A-1)*cos(w0) - 2*sqrt(A)*alpha );
- a0 = (A+1) - (A-1)*cos(w0) + 2*sqrt(A)*alpha;
- a1 = 2*( (A-1) - (A+1)*cos(w0) );
- a2 = (A+1) - (A-1)*cos(w0) - 2*sqrt(A)*alpha;
+ b0 = A*( (A+1) + (A-1)*cosf(w0) + 2*sqrtf(A)*alpha );
+ b1 = -2*A*( (A-1) + (A+1)*cosf(w0) );
+ b2 = A*( (A+1) + (A-1)*cosf(w0) - 2*sqrtf(A)*alpha );
+ a0 = (A+1) - (A-1)*cosf(w0) + 2*sqrtf(A)*alpha;
+ a1 = 2*( (A-1) - (A+1)*cosf(w0) );
+ a2 = (A+1) - (A-1)*cosf(w0) - 2*sqrtf(A)*alpha;
}
else
{
- b0 = A*( (A+1) - (A-1)*cos(w0) + 2*sqrt(A)*alpha );
- b1 = 2*A*( (A-1) - (A+1)*cos(w0));
- b2 = A*( (A+1) - (A-1)*cos(w0) - 2*sqrt(A)*alpha );
- a0 = (A+1) + (A-1)*cos(w0) + 2*sqrt(A)*alpha;
- a1 = -2*( (A-1) + (A+1)*cos(w0));
- a2 = (A+1) + (A-1)*cos(w0) - 2*sqrt(A)*alpha;
+ b0 = A*( (A+1) - (A-1)*cosf(w0) + 2*sqrtf(A)*alpha );
+ b1 = 2*A*( (A-1) - (A+1)*cosf(w0));
+ b2 = A*( (A+1) - (A-1)*cosf(w0) - 2*sqrtf(A)*alpha );
+ a0 = (A+1) + (A-1)*cosf(w0) + 2*sqrtf(A)*alpha;
+ a1 = -2*( (A-1) + (A+1)*cosf(w0));
+ a2 = (A+1) + (A-1)*cosf(w0) - 2*sqrtf(A)*alpha;
}
// Store values to coeffs and normalize by 1/a0
coeffs[0] = b0/a0;
projects / vlc / blobdiff