/*****************************************************************************
* 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.
*****************************************************************************/
/*****************************************************************************
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_aout.h>
+#include <vlc_filter.h>
/*****************************************************************************
* Module descriptor
static void Close( vlc_object_t * );
static void CalcPeakEQCoeffs( float, float, float, float, float * );
static void CalcShelfEQCoeffs( float, float, float, int, float, float * );
-static void ProcessEQ( float *, float *, float *, unsigned, unsigned, float *, unsigned );
-static void DoWork( aout_instance_t *, aout_filter_t *,
- aout_buffer_t *, aout_buffer_t * );
+static void ProcessEQ( const float *, float *, float *, unsigned, unsigned,
+ const float *, unsigned );
+static block_t *DoWork( filter_t *, block_t * );
vlc_module_begin ()
set_description( N_("Parametric Equalizer") )
set_category( CAT_AUDIO )
set_subcategory( SUBCAT_AUDIO_AFILTER )
- add_float( "param-eq-lowf", 100, NULL, N_("Low freq (Hz)"),"", false )
- add_float_with_range( "param-eq-lowgain", 0, -20.0, 20.0, NULL,
- N_("Low freq gain (dB)"), "",false )
- add_float( "param-eq-highf", 10000, NULL, N_("High freq (Hz)"),"", false )
- add_float_with_range( "param-eq-highgain", 0, -20.0, 20.0, NULL,
- N_("High freq gain (dB)"),"",false )
- add_float( "param-eq-f1", 300, NULL, N_("Freq 1 (Hz)"),"", false )
- add_float_with_range( "param-eq-gain1", 0, -20.0, 20.0, NULL,
- N_("Freq 1 gain (dB)"), "",false )
- add_float_with_range( "param-eq-q1", 3, 0.1, 100.0, NULL,
- N_("Freq 1 Q"), "",false )
- add_float( "param-eq-f2", 1000, NULL, N_("Freq 2 (Hz)"),"", false )
- add_float_with_range( "param-eq-gain2", 0, -20.0, 20.0, NULL,
- N_("Freq 2 gain (dB)"),"",false )
- add_float_with_range( "param-eq-q2", 3, 0.1, 100.0, NULL,
- N_("Freq 2 Q"),"",false )
- add_float( "param-eq-f3", 3000, NULL, N_("Freq 3 (Hz)"),"", false )
- add_float_with_range( "param-eq-gain3", 0, -20.0, 20.0, NULL,
- N_("Freq 3 gain (dB)"),"",false )
- add_float_with_range( "param-eq-q3", 3, 0.1, 100.0, NULL,
- N_("Freq 3 Q"),"",false )
+ 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, 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, 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,
+ N_("Freq 1 Q"), NULL,false )
+ 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,
+ N_("Freq 2 Q"),NULL,false )
+ 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,
+ N_("Freq 3 Q"),NULL,false )
set_callbacks( Open, Close )
vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
-struct aout_filter_sys_t
+struct filter_sys_t
{
/* Filter static config */
float f_lowf, f_lowgain;
float coeffs[5*5];
/* State */
float *p_state;
-
};
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
- aout_filter_t *p_filter = (aout_filter_t *)p_this;
- aout_filter_sys_t *p_sys;
- bool b_fit = true;
- int i_samplerate;
+ filter_t *p_filter = (filter_t *)p_this;
+ unsigned i_samplerate;
- if( p_filter->input.i_format != VLC_CODEC_FL32 ||
- p_filter->output.i_format != VLC_CODEC_FL32 )
- {
- b_fit = false;
- p_filter->input.i_format = VLC_CODEC_FL32;
- p_filter->output.i_format = VLC_CODEC_FL32;
- msg_Warn( p_filter, "bad input or output format" );
- }
- if ( !AOUT_FMTS_SIMILAR( &p_filter->input, &p_filter->output ) )
- {
- b_fit = false;
- memcpy( &p_filter->output, &p_filter->input,
- sizeof(audio_sample_format_t) );
- msg_Warn( p_filter, "input and output formats are not similar" );
- }
-
- if ( ! b_fit )
- {
+ /* Allocate structure */
+ filter_sys_t *p_sys = p_filter->p_sys = malloc( sizeof( *p_sys ) );
+ if( !p_sys )
return VLC_EGENERIC;
- }
- p_filter->pf_do_work = DoWork;
- p_filter->b_in_place = true;
-
- /* Allocate structure */
- p_sys = p_filter->p_sys = malloc( sizeof( aout_filter_sys_t ) );
+ 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 = config_GetFloat( p_this, "param-eq-lowf");
- p_sys->f_lowgain = config_GetFloat( p_this, "param-eq-lowgain");
- p_sys->f_highf = config_GetFloat( p_this, "param-eq-highf");
- p_sys->f_highgain = config_GetFloat( p_this, "param-eq-highgain");
+ p_sys->f_lowf = var_InheritFloat( p_this, "param-eq-lowf");
+ p_sys->f_lowgain = var_InheritFloat( p_this, "param-eq-lowgain");
+ p_sys->f_highf = var_InheritFloat( p_this, "param-eq-highf");
+ p_sys->f_highgain = var_InheritFloat( p_this, "param-eq-highgain");
- p_sys->f_f1 = config_GetFloat( p_this, "param-eq-f1");
- p_sys->f_Q1 = config_GetFloat( p_this, "param-eq-q1");
- p_sys->f_gain1 = config_GetFloat( p_this, "param-eq-gain1");
+ p_sys->f_f1 = var_InheritFloat( p_this, "param-eq-f1");
+ p_sys->f_Q1 = var_InheritFloat( p_this, "param-eq-q1");
+ p_sys->f_gain1 = var_InheritFloat( p_this, "param-eq-gain1");
- p_sys->f_f2 = config_GetFloat( p_this, "param-eq-f2");
- p_sys->f_Q2 = config_GetFloat( p_this, "param-eq-q2");
- p_sys->f_gain2 = config_GetFloat( p_this, "param-eq-gain2");
+ p_sys->f_f2 = var_InheritFloat( p_this, "param-eq-f2");
+ p_sys->f_Q2 = var_InheritFloat( p_this, "param-eq-q2");
+ p_sys->f_gain2 = var_InheritFloat( p_this, "param-eq-gain2");
- p_sys->f_f3 = config_GetFloat( p_this, "param-eq-f3");
- p_sys->f_Q3 = config_GetFloat( p_this, "param-eq-q3");
- p_sys->f_gain3 = config_GetFloat( p_this, "param-eq-gain3");
+ p_sys->f_f3 = var_InheritFloat( p_this, "param-eq-f3");
+ p_sys->f_Q3 = var_InheritFloat( p_this, "param-eq-q3");
+ p_sys->f_gain3 = var_InheritFloat( p_this, "param-eq-gain3");
- i_samplerate = p_filter->input.i_rate;
+ i_samplerate = p_filter->fmt_in.audio.i_rate;
CalcPeakEQCoeffs(p_sys->f_f1, p_sys->f_Q1, p_sys->f_gain1,
i_samplerate, p_sys->coeffs+0*5);
CalcPeakEQCoeffs(p_sys->f_f2, p_sys->f_Q2, p_sys->f_gain2,
i_samplerate, p_sys->coeffs+3*5);
CalcShelfEQCoeffs(p_sys->f_highf, 1, p_sys->f_highgain, 0,
i_samplerate, p_sys->coeffs+4*5);
- p_sys->p_state = (float*)calloc( p_filter->input.i_channels*5*4,
+ p_sys->p_state = (float*)calloc( p_filter->fmt_in.audio.i_channels*5*4,
sizeof(float) );
return VLC_SUCCESS;
static void Close( vlc_object_t *p_this )
{
- aout_filter_t *p_filter = (aout_filter_t *)p_this;
+ filter_t *p_filter = (filter_t *)p_this;
free( p_filter->p_sys->p_state );
free( p_filter->p_sys );
}
*****************************************************************************
*
*****************************************************************************/
-static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
- aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
+static block_t *DoWork( filter_t * p_filter, block_t * p_in_buf )
{
- VLC_UNUSED(p_aout);
- p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
- p_out_buf->i_nb_bytes = p_in_buf->i_nb_bytes;
-
- ProcessEQ( (float*)p_in_buf->p_buffer, (float*)p_out_buf->p_buffer,
+ ProcessEQ( (float*)p_in_buf->p_buffer, (float*)p_in_buf->p_buffer,
p_filter->p_sys->p_state,
- p_filter->input.i_channels, p_in_buf->i_nb_samples,
+ p_filter->fmt_in.audio.i_channels, p_in_buf->i_nb_samples,
p_filter->p_sys->coeffs, 5 );
+ return p_in_buf;
}
/*
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;
samples is not premultiplied by channels
size of coeffs is 5*eqCount
*/
-void ProcessEQ( float *src, float *dest, float *state,
- unsigned channels, unsigned samples, float *coeffs,
+void ProcessEQ( const float *src, float *dest, float *state,
+ unsigned channels, unsigned samples, const float *coeffs,
unsigned eqCount )
{
unsigned i, chn, eq;
float b0, b1, b2, a1, a2;
float x, y = 0;
- float *src1, *dest1;
- float *coeffs1, *state1;
- src1 = src;
- dest1 = dest;
+ const float *src1 = src;
+ float *dest1 = dest;
+
for (i = 0; i < samples; i++)
{
- state1 = state;
+ float *state1 = state;
for (chn = 0; chn < channels; chn++)
{
- coeffs1 = coeffs;
+ const float *coeffs1 = coeffs;
x = *src1++;
/* Direct form 1 IIRs */
for (eq = 0; eq < eqCount; eq++)
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