Steve Lhomme pushed to branch master at VideoLAN / VLC
Commits:
2e661498 by Thomas Guillem at 2024-04-08T13:32:19+00:00
modules: remove bandlimited "audio resampler"
cf. 9c74061333bd152a1467e49ed33b889c94410da9
Furthermore, it is probed as an "audio resampler" but won't load
if
`fmt_in.audio.i_rate == fmt_out.audio.i_rate` causing this module to be
never loaded.
"audio resampler" change the rate live.
"audio converter" convert the fixed samplerate.
This module should have been an "audio converter".
- - - - -
5 changed files:
- modules/audio_filter/Makefile.am
- modules/audio_filter/meson.build
- − modules/audio_filter/resampler/bandlimited.c
- − modules/audio_filter/resampler/bandlimited.h
- po/POTFILES.in
Changes:
=====================================
modules/audio_filter/Makefile.am
=====================================
@@ -114,9 +114,6 @@ audio_filter_LTLIBRARIES += \
libaudio_format_plugin.la
# Resamplers
-libbandlimited_resampler_plugin_la_SOURCES = \
- audio_filter/resampler/bandlimited.c \
- audio_filter/resampler/bandlimited.h
libugly_resampler_plugin_la_SOURCES = audio_filter/resampler/ugly.c
libsamplerate_plugin_la_SOURCES = audio_filter/resampler/src.c
libsamplerate_plugin_la_CPPFLAGS = $(AM_CPPFLAGS) $(SAMPLERATE_CFLAGS)
@@ -139,7 +136,6 @@ audio_filter_LTLIBRARIES += \
$(LTLIBebur128) \
libugly_resampler_plugin.la
EXTRA_LTLIBRARIES += \
- libbandlimited_resampler_plugin.la \
libsamplerate_plugin.la \
libsoxr_plugin.la \
libebur128_plugin.la
=====================================
modules/audio_filter/meson.build
=====================================
@@ -185,12 +185,6 @@ vlc_modules += {
## Resampler
-# TODO: Band-limited resampler module
-#vlc_modules += {
-# 'name' : 'bandlimited_resampler',
-# 'sources' : files('resampler/bandlimited.c')
-#}
-
# Ugly resampler module
vlc_modules += {
'name' : 'ugly_resampler',
=====================================
modules/audio_filter/resampler/bandlimited.c deleted
=====================================
@@ -1,548 +0,0 @@
-/*****************************************************************************
- * bandlimited.c : band-limited interpolation resampler
- *****************************************************************************
- * Copyright (C) 2002, 2006 VLC authors and VideoLAN
- *
- * Authors: Gildas Bazin <gba...@netcourrier.com>
- *
- * 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 Lesser General Public License for more details.
- *
- * 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.
- *****************************************************************************/
-
-/*****************************************************************************
- * Preamble:
- *
- * This implementation of the band-limited interpolationis based on the
- * following paper:
- * http://ccrma-www.stanford.edu/~jos/resample/resample.html
- *
- * It uses a Kaiser-windowed sinc-function low-pass filter and the width of the
- * filter is 13 samples.
- *
- *****************************************************************************/
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <vlc_common.h>
-#include <vlc_plugin.h>
-#include <vlc_aout.h>
-#include <vlc_filter.h>
-#include <vlc_block.h>
-
-#include <assert.h>
-
-#include "bandlimited.h"
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-
-/* audio filter */
-static int OpenFilter ( vlc_object_t * );
-static void CloseFilter( filter_t * );
-static block_t *Resample( filter_t *, block_t * );
-
-static void ResampleFloat( filter_t *p_filter,
- block_t **pp_out_buf, size_t *pi_out,
- float **pp_in,
- int i_in, int i_in_end,
- double d_factor, bool b_factor_old,
- int i_nb_channels, int i_bytes_per_frame );
-
-/*****************************************************************************
- * Local structures
- *****************************************************************************/
-typedef struct
-{
- int32_t *p_buf; /* this filter introduces a delay */
- size_t i_buf_size;
-
- double d_old_factor;
- size_t i_old_wing;
-
- unsigned int i_remainder; /* remainder of previous sample */
- bool b_first;
-
- date_t end_date;
-} filter_sys_t;
-
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-vlc_module_begin ()
- set_subcategory( SUBCAT_AUDIO_RESAMPLER )
- set_description( N_("Audio filter for band-limited interpolation
resampling") )
- set_capability( "audio converter", 20 )
- set_callback( OpenFilter )
-
- add_submodule()
- set_capability( "audio resampler", 20 )
- set_callback( OpenFilter )
-vlc_module_end ()
-
-/*****************************************************************************
- * Resample: convert a buffer
- *****************************************************************************/
-static block_t *Resample( filter_t * p_filter, block_t * p_in_buf )
-{
- if( !p_in_buf || !p_in_buf->i_nb_samples )
- {
- if( p_in_buf )
- block_Release( p_in_buf );
- return NULL;
- }
-
- filter_sys_t *p_sys = p_filter->p_sys;
- unsigned int i_out_rate = p_filter->fmt_out.audio.i_rate;
- int i_nb_channels = p_filter->fmt_in.audio.i_channels;
-
- /* Check if we really need to run the resampler */
- if( i_out_rate == p_filter->fmt_in.audio.i_rate )
- {
- if( !(p_in_buf->i_flags & BLOCK_FLAG_DISCONTINUITY) &&
- p_sys->i_old_wing )
- {
- /* output the whole thing with the samples from last time */
- p_in_buf = block_Realloc( p_in_buf,
- p_sys->i_old_wing * p_filter->fmt_in.audio.i_bytes_per_frame,
- p_in_buf->i_buffer );
- if( !p_in_buf )
- return NULL;
- memcpy( p_in_buf->p_buffer, p_sys->p_buf +
- i_nb_channels * p_sys->i_old_wing,
- p_sys->i_old_wing *
- p_filter->fmt_in.audio.i_bytes_per_frame );
-
- p_in_buf->i_nb_samples += p_sys->i_old_wing;
-
- p_in_buf->i_pts = date_Get( &p_sys->end_date );
- p_in_buf->i_length =
- date_Increment( &p_sys->end_date,
- p_in_buf->i_nb_samples ) - p_in_buf->i_pts;
- }
- p_sys->i_old_wing = 0;
- p_sys->b_first = true;
- return p_in_buf;
- }
-
- unsigned i_bytes_per_frame = p_filter->fmt_out.audio.i_channels *
- p_filter->fmt_out.audio.i_bitspersample / 8;
- size_t i_out_size = i_bytes_per_frame * ( 1 + ( p_in_buf->i_nb_samples *
- p_filter->fmt_out.audio.i_rate / p_filter->fmt_in.audio.i_rate) )
- + p_sys->i_buf_size;
- block_t *p_out_buf = block_Alloc( i_out_size );
- if( !p_out_buf )
- {
- block_Release( p_in_buf );
- return NULL;
- }
-
- if( (p_in_buf->i_flags & BLOCK_FLAG_DISCONTINUITY) || p_sys->b_first )
- {
- /* Continuity in sound samples has been broken, we'd better reset
- * everything. */
- p_out_buf->i_flags |= BLOCK_FLAG_DISCONTINUITY;
- p_sys->i_remainder = 0;
- date_Init( &p_sys->end_date, i_out_rate, 1 );
- date_Set( &p_sys->end_date, p_in_buf->i_pts );
- p_sys->d_old_factor = 1;
- p_sys->i_old_wing = 0;
- p_sys->b_first = false;
- }
-
- size_t i_in_nb = p_in_buf->i_nb_samples;
- size_t i_in, i_out = 0;
- double d_factor, d_scale_factor, d_old_scale_factor;
- size_t i_filter_wing;
-
-#if 0
- msg_Err( p_filter, "old rate: %i, old factor: %f, old wing: %i, i_in: %i",
- p_sys->i_old_rate, p_sys->d_old_factor,
- p_sys->i_old_wing, i_in_nb );
-#endif
-
- /* Same format in and out... */
- assert( p_filter->fmt_in.audio.i_bytes_per_frame == i_bytes_per_frame );
-
- /* Prepare the source buffer */
- if( p_sys->i_old_wing )
- { /* Copy all our samples in p_in_buf */
- /* Normally, there should be enough room for the old wing in the
- * buffer head room. Otherwise, we need to copy memory anyway. */
- p_in_buf = block_Realloc( p_in_buf,
- p_sys->i_old_wing * 2 * i_bytes_per_frame,
- p_in_buf->i_buffer );
- if( unlikely(p_in_buf == NULL) )
- return NULL;
- memcpy( p_in_buf->p_buffer, p_sys->p_buf,
- p_sys->i_old_wing * 2 * i_bytes_per_frame );
- }
- i_in_nb += (p_sys->i_old_wing * 2);
- float *p_in = (float *)p_in_buf->p_buffer;
- const float *p_in_orig = p_in;
-
- /* Make sure the output buffer is reset */
- memset( p_out_buf->p_buffer, 0, p_out_buf->i_buffer );
-
- /* Calculate the new length of the filter wing */
- d_factor = (double)i_out_rate / p_filter->fmt_in.audio.i_rate;
- i_filter_wing = ((SMALL_FILTER_NMULT+1)/2.0) * __MAX(1.0,1.0/d_factor) + 1;
-
- /* Account for increased filter gain when using factors less than 1 */
- d_old_scale_factor = SMALL_FILTER_SCALE *
- p_sys->d_old_factor + 0.5;
- d_scale_factor = SMALL_FILTER_SCALE * d_factor + 0.5;
-
- /* Apply the old rate until we have enough samples for the new one */
- i_in = p_sys->i_old_wing;
- p_in += p_sys->i_old_wing * i_nb_channels;
-
- size_t i_old_in_end = 0;
- if( p_sys->i_old_wing <= i_in_nb )
- i_old_in_end = __MIN( i_filter_wing, i_in_nb - p_sys->i_old_wing );
-
- ResampleFloat( p_filter,
- &p_out_buf, &i_out, &p_in,
- i_in, i_old_in_end,
- p_sys->d_old_factor, true,
- i_nb_channels, i_bytes_per_frame );
- i_in = __MAX( i_in, i_old_in_end );
-
- /* Apply the new rate for the rest of the samples */
- if( i_in < i_in_nb - i_filter_wing )
- {
- p_sys->d_old_factor = d_factor;
- p_sys->i_old_wing = i_filter_wing;
- }
- if( p_out_buf )
- {
- ResampleFloat( p_filter,
- &p_out_buf, &i_out, &p_in,
- i_in, i_in_nb - i_filter_wing,
- d_factor, false,
- i_nb_channels, i_bytes_per_frame );
-
- /* Finalize aout buffer */
- p_out_buf->i_nb_samples = i_out;
- p_out_buf->i_dts =
- p_out_buf->i_pts = date_Get( &p_sys->end_date );
- p_out_buf->i_length = date_Increment( &p_sys->end_date,
- p_out_buf->i_nb_samples ) -
p_out_buf->i_pts;
-
- p_out_buf->i_buffer = p_out_buf->i_nb_samples *
- i_nb_channels * sizeof(int32_t);
- }
-
- /* Buffer i_filter_wing * 2 samples for next time */
- if( p_sys->i_old_wing )
- {
- size_t newsize = p_sys->i_old_wing * 2 * i_bytes_per_frame;
- if( newsize > p_sys->i_buf_size )
- {
- free( p_sys->p_buf );
- p_sys->p_buf = malloc( newsize );
- if( p_sys->p_buf != NULL )
- p_sys->i_buf_size = newsize;
- else
- {
- p_sys->i_buf_size = p_sys->i_old_wing = 0; /* oops! */
- block_Release( p_in_buf );
- return p_out_buf;
- }
- }
- memcpy( p_sys->p_buf,
- p_in_orig + (i_in_nb - 2 * p_sys->i_old_wing) *
- i_nb_channels, (2 * p_sys->i_old_wing) *
- p_filter->fmt_in.audio.i_bytes_per_frame );
- }
-
-#if 0
- msg_Err( p_filter, "p_out size: %i, nb bytes out: %i", p_out_buf->i_buffer,
- i_out * p_filter->fmt_in.audio.i_bytes_per_frame );
-#endif
-
- block_Release( p_in_buf );
- return p_out_buf;
-}
-
-static const struct vlc_filter_operations filter_ops = {
- .filter_audio = Resample, .close = CloseFilter,
-};
-
-/*****************************************************************************
- * OpenFilter:
- *****************************************************************************/
-static int OpenFilter( vlc_object_t *p_this )
-{
- filter_t *p_filter = (filter_t *)p_this;
- filter_sys_t *p_sys;
- unsigned int i_out_rate = p_filter->fmt_out.audio.i_rate;
-
- if ( p_filter->fmt_in.audio.i_rate == p_filter->fmt_out.audio.i_rate
- || p_filter->fmt_in.audio.i_format != p_filter->fmt_out.audio.i_format
- || p_filter->fmt_in.audio.i_channels !=
p_filter->fmt_out.audio.i_channels
- || p_filter->fmt_in.audio.i_format != VLC_CODEC_FL32 )
- {
- return VLC_EGENERIC;
- }
-
- /* Allocate the memory needed to store the module's structure */
- p_filter->p_sys = p_sys = malloc( sizeof(*p_sys) );
- if( p_sys == NULL )
- return VLC_ENOMEM;
-
- p_sys->p_buf = NULL;
- p_sys->i_buf_size = 0;
-
- p_sys->i_old_wing = 0;
- p_sys->b_first = true;
- p_filter->ops = &filter_ops;
-
- msg_Dbg( p_this, "%4.4s/%iKHz/%i->%4.4s/%iKHz/%i",
- (char *)&p_filter->fmt_in.i_codec,
- p_filter->fmt_in.audio.i_rate,
- p_filter->fmt_in.audio.i_channels,
- (char *)&p_filter->fmt_out.i_codec,
- p_filter->fmt_out.audio.i_rate,
- p_filter->fmt_out.audio.i_channels);
-
- p_filter->fmt_out = p_filter->fmt_in;
- p_filter->fmt_out.audio.i_rate = i_out_rate;
-
- return 0;
-}
-
-/*****************************************************************************
- * CloseFilter : deallocate data structures
- *****************************************************************************/
-static void CloseFilter( filter_t *p_filter )
-{
- filter_sys_t *p_sys = p_filter->p_sys;
- free( p_sys->p_buf );
- free( p_sys );
-}
-
-static void FilterFloatUP( const float Imp[], const float ImpD[], uint16_t
Nwing, float *p_in,
- float *p_out, uint32_t ui_remainder,
- uint32_t ui_output_rate, int16_t Inc, int
i_nb_channels )
-{
- const float *Hp, *Hdp, *End;
- float t, temp;
- uint32_t ui_linear_remainder;
- int i;
-
- Hp = &Imp[(ui_remainder<<Nhc)/ui_output_rate];
- Hdp = &ImpD[(ui_remainder<<Nhc)/ui_output_rate];
-
- End = &Imp[Nwing];
-
- ui_linear_remainder = (ui_remainder<<Nhc) -
- (ui_remainder<<Nhc)/ui_output_rate*ui_output_rate;
-
- if (Inc == 1) /* If doing right wing... */
- { /* ...drop extra coeff, so when Ph is */
- End--; /* 0.5, we don't do too many mult's */
- if (ui_remainder == 0) /* If the phase is zero... */
- { /* ...then we've already skipped the */
- Hp += Npc; /* first sample, so we must also */
- Hdp += Npc; /* skip ahead in Imp[] and ImpD[] */
- }
- }
-
- while (Hp < End) {
- t = *Hp; /* Get filter coeff */
- /* t is now interp'd filter coeff */
- t += *Hdp * ui_linear_remainder / ui_output_rate / Npc;
- for( i = 0; i < i_nb_channels; i++ )
- {
- temp = t;
- temp *= *(p_in+i); /* Mult coeff by input sample */
- *(p_out+i) += temp; /* The filter output */
- }
- Hdp += Npc; /* Filter coeff differences step */
- Hp += Npc; /* Filter coeff step */
- p_in += (Inc * i_nb_channels); /* Input signal step */
- }
-}
-
-static void FilterFloatUD( const float Imp[], const float ImpD[], uint16_t
Nwing, float *p_in,
- float *p_out, uint32_t ui_remainder,
- uint32_t ui_output_rate, uint32_t ui_input_rate,
- int16_t Inc, int i_nb_channels )
-{
- const float *Hp, *Hdp, *End;
- float t, temp;
- uint32_t ui_linear_remainder;
- int i, ui_counter = 0;
-
- Hp = Imp + (ui_remainder<<Nhc) / ui_input_rate;
- Hdp = ImpD + (ui_remainder<<Nhc) / ui_input_rate;
-
- End = &Imp[Nwing];
-
- if (Inc == 1) /* If doing right wing... */
- { /* ...drop extra coeff, so when Ph is */
- End--; /* 0.5, we don't do too many mult's */
- if (ui_remainder == 0) /* If the phase is zero... */
- { /* ...then we've already skipped the */
- Hp = Imp + /* first sample, so we must also */
- (ui_output_rate << Nhc) / ui_input_rate;
- Hdp = ImpD + /* skip ahead in Imp[] and ImpD[] */
- (ui_output_rate << Nhc) / ui_input_rate;
- ui_counter++;
- }
- }
-
- while (Hp < End) {
- t = *Hp; /* Get filter coeff */
- /* t is now interp'd filter coeff */
- ui_linear_remainder =
- ((ui_output_rate * ui_counter + ui_remainder)<< Nhc) -
- ((ui_output_rate * ui_counter + ui_remainder)<< Nhc) /
- ui_input_rate * ui_input_rate;
- t += *Hdp * ui_linear_remainder / ui_input_rate / Npc;
- for( i = 0; i < i_nb_channels; i++ )
- {
- temp = t;
- temp *= *(p_in+i); /* Mult coeff by input sample */
- *(p_out+i) += temp; /* The filter output */
- }
-
- ui_counter++;
-
- /* Filter coeff step */
- Hp = Imp + ((ui_output_rate * ui_counter + ui_remainder)<< Nhc)
- / ui_input_rate;
- /* Filter coeff differences step */
- Hdp = ImpD + ((ui_output_rate * ui_counter + ui_remainder)<< Nhc)
- / ui_input_rate;
-
- p_in += (Inc * i_nb_channels); /* Input signal step */
- }
-}
-
-static int ReallocBuffer( block_t **pp_out_buf,
- float **pp_out, size_t i_out,
- int i_nb_channels, int i_bytes_per_frame )
-{
- if( i_out < (*pp_out_buf)->i_buffer/i_bytes_per_frame )
- return VLC_SUCCESS;
-
- /* It may happen when the wing size changes */
- const unsigned i_extra_frame = 256;
- *pp_out_buf = block_Realloc( *pp_out_buf, 0,
- (*pp_out_buf)->i_buffer +
- i_extra_frame * i_bytes_per_frame );
- if( !*pp_out_buf )
- return VLC_EGENERIC;
-
- *pp_out = (float*)(*pp_out_buf)->p_buffer + i_out * i_nb_channels;
- memset( *pp_out, 0, i_extra_frame * i_bytes_per_frame );
- return VLC_SUCCESS;
-}
-
-static void ResampleFloat( filter_t *p_filter,
- block_t **pp_out_buf, size_t *pi_out,
- float **pp_in,
- int i_in, int i_in_end,
- double d_factor, bool b_factor_old,
- int i_nb_channels, int i_bytes_per_frame )
-{
- filter_sys_t *p_sys = p_filter->p_sys;
-
- float *p_in = *pp_in;
- size_t i_out = *pi_out;
- float *p_out = (float*)(*pp_out_buf)->p_buffer + i_out * i_nb_channels;
-
- for( ; i_in < i_in_end; i_in++ )
- {
- if( b_factor_old && d_factor == 1 )
- {
- if( ReallocBuffer( pp_out_buf, &p_out,
- i_out, i_nb_channels, i_bytes_per_frame ) )
- return;
- /* Just copy the samples */
- memcpy( p_out, p_in, i_bytes_per_frame );
- p_in += i_nb_channels;
- p_out += i_nb_channels;
- i_out++;
- continue;
- }
-
- while( p_sys->i_remainder < p_filter->fmt_out.audio.i_rate )
- {
- if( ReallocBuffer( pp_out_buf, &p_out,
- i_out, i_nb_channels, i_bytes_per_frame ) )
- return;
-
- if( d_factor >= 1 )
- {
- /* FilterFloatUP() is faster if we can use it */
-
- /* Perform left-wing inner product */
- FilterFloatUP( SMALL_FILTER_FLOAT_IMP, SMALL_FILTER_FLOAT_IMPD,
- SMALL_FILTER_NWING, p_in, p_out,
- p_sys->i_remainder,
- p_filter->fmt_out.audio.i_rate,
- -1, i_nb_channels );
- /* Perform right-wing inner product */
- FilterFloatUP( SMALL_FILTER_FLOAT_IMP, SMALL_FILTER_FLOAT_IMPD,
- SMALL_FILTER_NWING, p_in + i_nb_channels, p_out,
- p_filter->fmt_out.audio.i_rate -
- p_sys->i_remainder,
- p_filter->fmt_out.audio.i_rate,
- 1, i_nb_channels );
-
-#if 0
- /* Normalize for unity filter gain */
- for( i = 0; i < i_nb_channels; i++ )
- {
- *(p_out+i) *= d_old_scale_factor;
- }
-#endif
- }
- else
- {
- /* Perform left-wing inner product */
- FilterFloatUD( SMALL_FILTER_FLOAT_IMP, SMALL_FILTER_FLOAT_IMPD,
- SMALL_FILTER_NWING, p_in, p_out,
- p_sys->i_remainder,
- p_filter->fmt_out.audio.i_rate,
p_filter->fmt_in.audio.i_rate,
- -1, i_nb_channels );
- /* Perform right-wing inner product */
- FilterFloatUD( SMALL_FILTER_FLOAT_IMP, SMALL_FILTER_FLOAT_IMPD,
- SMALL_FILTER_NWING, p_in + i_nb_channels, p_out,
- p_filter->fmt_out.audio.i_rate -
- p_sys->i_remainder,
- p_filter->fmt_out.audio.i_rate,
p_filter->fmt_in.audio.i_rate,
- 1, i_nb_channels );
- }
-
- p_out += i_nb_channels;
- i_out++;
-
- p_sys->i_remainder += p_filter->fmt_in.audio.i_rate;
- }
-
- p_in += i_nb_channels;
- p_sys->i_remainder -= p_filter->fmt_out.audio.i_rate;
- }
-
- *pp_in = p_in;
- *pi_out = i_out;
-}
-
-
=====================================
modules/audio_filter/resampler/bandlimited.h deleted
=====================================
@@ -1,3124 +0,0 @@
-/*****************************************************************************
- * bandlimited.h : bandlimited interpolation resampler
- *****************************************************************************
- * Copyright (C) 2002 VLC authors and VideoLAN
- *
- * Authors: Gildas Bazin <gba...@netcourrier.com>
- *
- * 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 Lesser General Public License for more details.
- *
- * 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.
- *****************************************************************************/
-
-/* Conversion constants */
-#define Nhc 8
-#define Npc (1<<Nhc)
-
-/* Description of constants:
- *
- * Npc - is the number of look-up values available for the lowpass filter
- * between the beginning of its impulse response and the "cutoff time"
- * of the filter. The cutoff time is defined as the reciprocal of the
- * lowpass-filter cut off frequence in Hz. For example, if the
- * lowpass filter were a sinc function, Npc would be the index of the
- * impulse-response lookup-table corresponding to the first zero-
- * crossing of the sinc function. (The inverse first zero-crossing
- * time of a sinc function equals its nominal cutoff frequency in Hz.)
- * Npc must be a power of 2 due to the details of the current
- * implementation. The default value of 512 is sufficiently high that
- * using linear interpolation to fill in between the table entries
- * gives approximately 16-bit accuracy in filter coefficients.
- *
- * Nhc - is log base 2 of Npc.
- */
-
-#define SMALL_FILTER_NMULT ((int16_t)13)
-#define SMALL_FILTER_SCALE 13128 /* Unity-gain scale factor */
-#define SMALL_FILTER_NWING 1536 /* Filter table length */
-static const float SMALL_FILTER_FLOAT_IMP[] /* Impulse response */ = {
-0.900000,
-0.899980,
-0.899920,
-0.899821,
-0.899681,
-0.899502,
-0.899283,
-0.899024,
-0.898726,
-0.898388,
-0.898010,
-0.897592,
-0.897135,
-0.896638,
-0.896102,
-0.895526,
-0.894911,
-0.894256,
-0.893562,
-0.892829,
-0.892056,
-0.891244,
-0.890394,
-0.889504,
-0.888575,
-0.887608,
-0.886602,
-0.885557,
-0.884474,
-0.883352,
-0.882192,
-0.880993,
-0.879756,
-0.878482,
-0.877169,
-0.875818,
-0.874430,
-0.873004,
-0.871541,
-0.870040,
-0.868502,
-0.866927,
-0.865315,
-0.863667,
-0.861981,
-0.860259,
-0.858501,
-0.856707,
-0.854876,
-0.853010,
-0.851108,
-0.849170,
-0.847197,
-0.845189,
-0.843146,
-0.841067,
-0.838954,
-0.836807,
-0.834625,
-0.832409,
-0.830160,
-0.827876,
-0.825559,
-0.823209,
-0.820825,
-0.818408,
-0.815959,
-0.813477,
-0.810963,
-0.808417,
-0.805839,
-0.803229,
-0.800588,
-0.797916,
-0.795213,
-0.792479,
-0.789714,
-0.786919,
-0.784095,
-0.781240,
-0.778356,
-0.775442,
-0.772500,
-0.769529,
-0.766529,
-0.763501,
-0.760444,
-0.757361,
-0.754249,
-0.751110,
-0.747945,
-0.744753,
-0.741534,
-0.738289,
-0.735018,
-0.731721,
-0.728400,
-0.725053,
-0.721681,
-0.718285,
-0.714865,
-0.711420,
-0.707953,
-0.704461,
-0.700947,
-0.697410,
-0.693851,
-0.690269,
-0.686665,
-0.683040,
-0.679394,
-0.675727,
-0.672039,
-0.668331,
-0.664602,
-0.660854,
-0.657087,
-0.653300,
-0.649495,
-0.645671,
-0.641829,
-0.637969,
-0.634091,
-0.630197,
-0.626285,
-0.622357,
-0.618412,
-0.614452,
-0.610476,
-0.606485,
-0.602478,
-0.598457,
-0.594422,
-0.590373,
-0.586310,
-0.582234,
-0.578144,
-0.574042,
-0.569928,
-0.565801,
-0.561663,
-0.557514,
-0.553353,
-0.549182,
-0.545001,
-0.540809,
-0.536607,
-0.532397,
-0.528177,
-0.523948,
-0.519711,
-0.515466,
-0.511214,
-0.506954,
-0.502686,
-0.498413,
-0.494132,
-0.489846,
-0.485554,
-0.481256,
-0.476954,
-0.472646,
-0.468335,
-0.464019,
-0.459699,
-0.455377,
-0.451050,
-0.446722,
-0.442390,
-0.438057,
-0.433722,
-0.429385,
-0.425048,
-0.420709,
-0.416370,
-0.412031,
-0.407692,
-0.403354,
-0.399016,
-0.394679,
-0.390344,
-0.386011,
-0.381680,
-0.377351,
-0.373025,
-0.368702,
-0.364382,
-0.360066,
-0.355754,
-0.351446,
-0.347143,
-0.342844,
-0.338551,
-0.334264,
-0.329982,
-0.325706,
-0.321437,
-0.317174,
-0.312918,
-0.308670,
-0.304429,
-0.300197,
-0.295972,
-0.291756,
-0.287548,
-0.283350,
-0.279161,
-0.274982,
-0.270812,
-0.266653,
-0.262504,
-0.258366,
-0.254239,
-0.250123,
-0.246018,
-0.241926,
-0.237846,
-0.233777,
-0.229722,
-0.225679,
-0.221650,
-0.217634,
-0.213632,
-0.209643,
-0.205669,
-0.201709,
-0.197764,
-0.193833,
-0.189918,
-0.186018,
-0.182134,
-0.178265,
-0.174413,
-0.170577,
-0.166758,
-0.162955,
-0.159169,
-0.155401,
-0.151650,
-0.147916,
-0.144201,
-0.140503,
-0.136824,
-0.133163,
-0.129521,
-0.125898,
-0.122294,
-0.118710,
-0.115145,
-0.111599,
-0.108073,
-0.104568,
-0.101083,
-0.097618,
-0.094174,
-0.090750,
-0.087348,
-0.083966,
-0.080606,
-0.077268,
-0.073951,
-0.070656,
-0.067383,
-0.064132,
-0.060903,
-0.057697,
-0.054513,
-0.051352,
-0.048214,
-0.045099,
-0.042006,
-0.038938,
-0.035892,
-0.032870,
-0.029872,
-0.026898,
-0.023947,
-0.021021,
-0.018118,
-0.015240,
-0.012386,
-0.009557,
-0.006752,
-0.003972,
-0.001217,
--0.001514,
--0.004219,
--0.006900,
--0.009555,
--0.012186,
--0.014790,
--0.017370,
--0.019924,
--0.022453,
--0.024956,
--0.027433,
--0.029885,
--0.032310,
--0.034710,
--0.037085,
--0.039433,
--0.041755,
--0.044051,
--0.046321,
--0.048565,
--0.050782,
--0.052974,
--0.055139,
--0.057278,
--0.059391,
--0.061477,
--0.063537,
--0.065570,
--0.067577,
--0.069558,
--0.071513,
--0.073440,
--0.075342,
--0.077217,
--0.079065,
--0.080887,
--0.082683,
--0.084452,
--0.086195,
--0.087911,
--0.089601,
--0.091265,
--0.092902,
--0.094513,
--0.096097,
--0.097656,
--0.099188,
--0.100693,
--0.102173,
--0.103626,
--0.105053,
--0.106454,
--0.107830,
--0.109179,
--0.110502,
--0.111799,
--0.113070,
--0.114316,
--0.115536,
--0.116730,
--0.117899,
--0.119042,
--0.120159,
--0.121251,
--0.122318,
--0.123360,
--0.124376,
--0.125368,
--0.126334,
--0.127275,
--0.128192,
--0.129083,
--0.129950,
--0.130793,
--0.131611,
--0.132404,
--0.133174,
--0.133919,
--0.134640,
--0.135337,
--0.136010,
--0.136659,
--0.137284,
--0.137886,
--0.138465,
--0.139020,
--0.139552,
--0.140061,
--0.140547,
--0.141010,
--0.141451,
--0.141868,
--0.142263,
--0.142636,
--0.142987,
--0.143316,
--0.143622,
--0.143907,
--0.144170,
--0.144412,
--0.144632,
--0.144830,
--0.145008,
--0.145165,
--0.145301,
--0.145416,
--0.145511,
--0.145585,
--0.145639,
--0.145673,
--0.145687,
--0.145681,
--0.145656,
--0.145611,
--0.145547,
--0.145464,
--0.145361,
--0.145240,
--0.145100,
--0.144942,
--0.144766,
--0.144571,
--0.144358,
--0.144127,
--0.143879,
--0.143613,
--0.143330,
--0.143030,
--0.142713,
--0.142379,
--0.142028,
--0.141661,
--0.141278,
--0.140878,
--0.140463,
--0.140032,
--0.139585,
--0.139123,
--0.138646,
--0.138153,
--0.137646,
--0.137124,
--0.136588,
--0.136037,
--0.135473,
--0.134894,
--0.134302,
--0.133696,
--0.133076,
--0.132444,
--0.131798,
--0.131140,
--0.130469,
--0.129785,
--0.129089,
--0.128381,
--0.127662,
--0.126930,
--0.126187,
--0.125433,
--0.124668,
--0.123891,
--0.123104,
--0.122306,
--0.121498,
--0.120680,
--0.119851,
--0.119013,
--0.118165,
--0.117308,
--0.116441,
--0.115565,
--0.114681,
--0.113788,
--0.112886,
--0.111976,
--0.111057,
--0.110131,
--0.109197,
--0.108255,
--0.107306,
--0.106350,
--0.105386,
--0.104416,
--0.103439,
--0.102455,
--0.101466,
--0.100470,
--0.099468,
--0.098460,
--0.097447,
--0.096428,
--0.095404,
--0.094375,
--0.093341,
--0.092303,
--0.091260,
--0.090212,
--0.089161,
--0.088105,
--0.087046,
--0.085982,
--0.084916,
--0.083846,
--0.082773,
--0.081697,
--0.080618,
--0.079536,
--0.078452,
--0.077366,
--0.076277,
--0.075187,
--0.074095,
--0.073001,
--0.071905,
--0.070808,
--0.069710,
--0.068611,
--0.067512,
--0.066411,
--0.065310,
--0.064209,
--0.063107,
--0.062005,
--0.060903,
--0.059802,
--0.058701,
--0.057600,
--0.056500,
--0.055401,
--0.054303,
--0.053206,
--0.052110,
--0.051015,
--0.049922,
--0.048831,
--0.047741,
--0.046654,
--0.045568,
--0.044485,
--0.043403,
--0.042325,
--0.041249,
--0.040175,
--0.039105,
--0.038037,
--0.036973,
--0.035912,
--0.034854,
--0.033799,
--0.032749,
--0.031701,
--0.030658,
--0.029619,
--0.028583,
--0.027552,
--0.026525,
--0.025502,
--0.024484,
--0.023471,
--0.022462,
--0.021458,
--0.020459,
--0.019464,
--0.018475,
--0.017491,
--0.016513,
--0.015539,
--0.014572,
--0.013610,
--0.012653,
--0.011702,
--0.010757,
--0.009818,
--0.008885,
--0.007958,
--0.007038,
--0.006123,
--0.005215,
--0.004313,
--0.003418,
--0.002530,
--0.001648,
--0.000772,
-0.000096,
-0.000958,
-0.001813,
-0.002660,
-0.003501,
-0.004335,
-0.005161,
-0.005980,
-0.006792,
-0.007597,
-0.008394,
-0.009183,
-0.009965,
-0.010740,
-0.011507,
-0.012266,
-0.013018,
-0.013762,
-0.014498,
-0.015226,
-0.015946,
-0.016658,
-0.017363,
-0.018059,
-0.018747,
-0.019428,
-0.020100,
-0.020764,
-0.021420,
-0.022067,
-0.022707,
-0.023338,
-0.023961,
-0.024575,
-0.025181,
-0.025779,
-0.026369,
-0.026950,
-0.027523,
-0.028087,
-0.028643,
-0.029191,
-0.029730,
-0.030260,
-0.030782,
-0.031296,
-0.031801,
-0.032297,
-0.032785,
-0.033265,
-0.033736,
-0.034199,
-0.034653,
-0.035098,
-0.035536,
-0.035964,
-0.036384,
-0.036796,
-0.037199,
-0.037594,
-0.037980,
-0.038358,
-0.038727,
-0.039088,
-0.039441,
-0.039785,
-0.040121,
-0.040448,
-0.040768,
-0.041078,
-0.041381,
-0.041675,
-0.041961,
-0.042239,
-0.042509,
-0.042770,
-0.043024,
-0.043269,
-0.043506,
-0.043735,
-0.043956,
-0.044169,
-0.044375,
-0.044572,
-0.044761,
-0.044943,
-0.045116,
-0.045282,
-0.045440,
-0.045591,
-0.045734,
-0.045869,
-0.045996,
-0.046117,
-0.046229,
-0.046334,
-0.046432,
-0.046522,
-0.046605,
-0.046681,
-0.046750,
-0.046811,
-0.046865,
-0.046913,
-0.046953,
-0.046986,
-0.047012,
-0.047032,
-0.047044,
-0.047050,
-0.047049,
-0.047042,
-0.047028,
-0.047007,
-0.046980,
-0.046946,
-0.046907,
-0.046860,
-0.046808,
-0.046749,
-0.046684,
-0.046613,
-0.046536,
-0.046453,
-0.046365,
-0.046270,
-0.046169,
-0.046063,
-0.045951,
-0.045834,
-0.045711,
-0.045583,
-0.045449,
-0.045310,
-0.045165,
-0.045016,
-0.044861,
-0.044701,
-0.044536,
-0.044366,
-0.044192,
-0.044012,
-0.043828,
-0.043639,
-0.043445,
-0.043247,
-0.043045,
-0.042838,
-0.042626,
-0.042411,
-0.042191,
-0.041967,
-0.041738,
-0.041506,
-0.041270,
-0.041030,
-0.040786,
-0.040539,
-0.040288,
-0.040033,
-0.039774,
-0.039513,
-0.039247,
-0.038979,
-0.038707,
-0.038432,
-0.038154,
-0.037872,
-0.037588,
-0.037301,
-0.037011,
-0.036718,
-0.036422,
-0.036124,
-0.035823,
-0.035520,
-0.035214,
-0.034906,
-0.034595,
-0.034282,
-0.033967,
-0.033650,
-0.033330,
-0.033009,
-0.032686,
-0.032361,
-0.032034,
-0.031705,
-0.031375,
-0.031043,
-0.030709,
-0.030374,
-0.030037,
-0.029700,
-0.029360,
-0.029020,
-0.028678,
-0.028336,
-0.027992,
-0.027647,
-0.027301,
-0.026955,
-0.026607,
-0.026259,
-0.025910,
-0.025561,
-0.025210,
-0.024860,
-0.024508,
-0.024157,
-0.023805,
-0.023453,
-0.023100,
-0.022748,
-0.022395,
-0.022042,
-0.021689,
-0.021336,
-0.020983,
-0.020630,
-0.020278,
-0.019926,
-0.019573,
-0.019222,
-0.018870,
-0.018520,
-0.018169,
-0.017819,
-0.017470,
-0.017121,
-0.016773,
-0.016426,
-0.016080,
-0.015734,
-0.015389,
-0.015045,
-0.014702,
-0.014360,
-0.014019,
-0.013679,
-0.013341,
-0.013003,
-0.012667,
-0.012332,
-0.011998,
-0.011665,
-0.011334,
-0.011004,
-0.010676,
-0.010349,
-0.010024,
-0.009700,
-0.009377,
-0.009057,
-0.008738,
-0.008421,
-0.008105,
-0.007791,
-0.007479,
-0.007169,
-0.006861,
-0.006554,
-0.006249,
-0.005947,
-0.005646,
-0.005347,
-0.005051,
-0.004756,
-0.004464,
-0.004173,
-0.003885,
-0.003599,
-0.003315,
-0.003033,
-0.002753,
-0.002476,
-0.002201,
-0.001928,
-0.001658,
-0.001390,
-0.001124,
-0.000861,
-0.000600,
-0.000341,
-0.000085,
--0.000169,
--0.000420,
--0.000669,
--0.000915,
--0.001159,
--0.001400,
--0.001639,
--0.001875,
--0.002109,
--0.002340,
--0.002568,
--0.002794,
--0.003017,
--0.003238,
--0.003456,
--0.003671,
--0.003884,
--0.004094,
--0.004301,
--0.004506,
--0.004708,
--0.004907,
--0.005104,
--0.005298,
--0.005489,
--0.005678,
--0.005863,
--0.006046,
--0.006227,
--0.006405,
--0.006579,
--0.006752,
--0.006921,
--0.007088,
--0.007252,
--0.007413,
--0.007572,
--0.007728,
--0.007881,
--0.008031,
--0.008179,
--0.008324,
--0.008466,
--0.008606,
--0.008743,
--0.008877,
--0.009008,
--0.009137,
--0.009263,
--0.009387,
--0.009507,
--0.009626,
--0.009741,
--0.009854,
--0.009964,
--0.010071,
--0.010176,
--0.010278,
--0.010378,
--0.010475,
--0.010569,
--0.010661,
--0.010751,
--0.010837,
--0.010922,
--0.011003,
--0.011082,
--0.011159,
--0.011233,
--0.011305,
--0.011374,
--0.011441,
--0.011505,
--0.011567,
--0.011626,
--0.011683,
--0.011738,
--0.011790,
--0.011840,
--0.011887,
--0.011932,
--0.011975,
--0.012016,
--0.012054,
--0.012090,
--0.012124,
--0.012156,
--0.012185,
--0.012212,
--0.012237,
--0.012260,
--0.012281,
--0.012299,
--0.012316,
--0.012330,
--0.012342,
--0.012352,
--0.012361,
--0.012367,
--0.012371,
--0.012373,
--0.012374,
--0.012372,
--0.012368,
--0.012363,
--0.012356,
--0.012346,
--0.012335,
--0.012323,
--0.012308,
--0.012292,
--0.012274,
--0.012254,
--0.012232,
--0.012209,
--0.012184,
--0.012157,
--0.012129,
--0.012099,
--0.012068,
--0.012035,
--0.012001,
--0.011965,
--0.011927,
--0.011888,
--0.011848,
--0.011806,
--0.011763,
--0.011718,
--0.011672,
--0.011625,
--0.011576,
--0.011527,
--0.011475,
--0.011423,
--0.011369,
--0.011314,
--0.011258,
--0.011201,
--0.011143,
--0.011083,
--0.011022,
--0.010961,
--0.010898,
--0.010834,
--0.010769,
--0.010704,
--0.010637,
--0.010569,
--0.010501,
--0.010431,
--0.010361,
--0.010289,
--0.010217,
--0.010144,
--0.010070,
--0.009996,
--0.009921,
--0.009845,
--0.009768,
--0.009690,
--0.009612,
--0.009533,
--0.009454,
--0.009374,
--0.009293,
--0.009212,
--0.009130,
--0.009048,
--0.008965,
--0.008882,
--0.008798,
--0.008714,
--0.008629,
--0.008544,
--0.008459,
--0.008373,
--0.008287,
--0.008200,
--0.008113,
--0.008026,
--0.007938,
--0.007851,
--0.007763,
--0.007674,
--0.007586,
--0.007497,
--0.007408,
--0.007319,
--0.007230,
--0.007141,
--0.007051,
--0.006962,
--0.006872,
--0.006783,
--0.006693,
--0.006603,
--0.006514,
--0.006424,
--0.006334,
--0.006244,
--0.006155,
--0.006065,
--0.005976,
--0.005886,
--0.005797,
--0.005708,
--0.005619,
--0.005530,
--0.005441,
--0.005352,
--0.005264,
--0.005176,
--0.005088,
--0.005000,
--0.004912,
--0.004825,
--0.004738,
--0.004651,
--0.004565,
--0.004479,
--0.004393,
--0.004307,
--0.004222,
--0.004137,
--0.004053,
--0.003969,
--0.003885,
--0.003802,
--0.003719,
--0.003636,
--0.003554,
--0.003472,
--0.003391,
--0.003310,
--0.003230,
--0.003150,
--0.003071,
--0.002992,
--0.002913,
--0.002835,
--0.002758,
--0.002681,
--0.002604,
--0.002528,
--0.002453,
--0.002378,
--0.002304,
--0.002230,
--0.002157,
--0.002084,
--0.002012,
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--0.001870,
--0.001800,
--0.001730,
--0.001661,
--0.001593,
--0.001525,
--0.001458,
--0.001391,
--0.001325,
--0.001260,
--0.001195,
--0.001131,
--0.001068,
--0.001005,
--0.000943,
--0.000881,
--0.000821,
--0.000760,
--0.000701,
--0.000642,
--0.000584,
--0.000526,
--0.000470,
--0.000413,
--0.000358,
--0.000303,
--0.000249,
--0.000196,
--0.000143,
--0.000091,
--0.000039,
-0.000011,
-0.000061,
-0.000111,
-0.000159,
-0.000207,
-0.000254,
-0.000301,
-0.000347,
-0.000392,
-0.000437,
-0.000480,
-0.000523,
-0.000566,
-0.000608,
-0.000649,
-0.000689,
-0.000729,
-0.000768,
-0.000806,
-0.000844,
-0.000881,
-0.000917,
-0.000953,
-0.000988,
-0.001022,
-0.001056,
-0.001089,
-0.001121,
-0.001153,
-0.001184,
-0.001214,
-0.001244,
-0.001273,
-0.001302,
-0.001329,
-0.001356,
-0.001383,
-0.001409,
-0.001434,
-0.001459,
-0.001483,
-0.001506,
-0.001529,
-0.001551,
-0.001573,
-0.001594,
-0.001614,
-0.001634,
-0.001653,
-0.001671,
-0.001689,
-0.001707,
-0.001724,
-0.001740,
-0.001756,
-0.001771,
-0.001785,
-0.001799,
-0.001813,
-0.001826,
-0.001838,
-0.001850,
-0.001862,
-0.001872,
-0.001883,
-0.001893,
-0.001902,
-0.001911,
-0.001919,
-0.001927,
-0.001934,
-0.001941,
-0.001947,
-0.001953,
-0.001959,
-0.001964,
-0.001968,
-0.001972,
-0.001976,
-0.001979,
-0.001982,
-0.001984,
-0.001986,
-0.001988,
-0.001989,
-0.001990,
-0.001990,
-0.001990,
-0.001989,
-0.001988,
-0.001987,
-0.001986,
-0.001984,
-0.001981,
-0.001979,
-0.001976,
-0.001972,
-0.001968,
-0.001964,
-0.001960,
-0.001955,
-0.001950,
-0.001945,
-0.001939,
-0.001933,
-0.001927,
-0.001921,
-0.001914,
-0.001907,
-0.001900,
-0.001892,
-0.001884,
-0.001876,
-0.001868,
-0.001859,
-0.001850,
-0.001841,
-0.001832,
-0.001822,
-0.001813,
-0.001803,
-0.001792,
-0.001782,
-0.001772,
-0.001761,
-0.001750,
-0.001739,
-0.001727,
-0.001716,
-0.001704,
-0.001693,
-0.001681,
-0.001669,
-0.001656,
-0.001644,
-0.001631,
-0.001619,
-0.001606,
-0.001593,
-0.001580,
-0.001567,
-0.001554,
-0.001540,
-0.001527,
-0.001514,
-0.001500,
-0.001486,
-0.001472,
-0.001459,
-0.001445,
-0.001431,
-0.001417,
-0.001402,
-0.001388,
-0.001374,
-0.001360,
-0.001345,
-0.001331,
-0.001317,
-0.001302,
-0.001288,
-0.001273,
-0.001259,
-0.001244,
-0.001230,
-0.001215,
-0.001200,
-0.001186,
-0.001171,
-0.001157,
-0.001142,
-0.001128,
-0.001113,
-0.001098,
-0.001084,
-0.001069,
-0.001055,
-0.001041,
-0.001026,
-0.001012,
-0.000997,
-0.000983,
-0.000969,
-0.000955,
-0.000940,
-0.000926,
-0.000912,
-0.000898,
-0.000884,
-0.000870,
-0.000856,
-0.000843,
-0.000829,
-0.000815,
-0.000802,
-0.000788,
-0.000775,
-0.000761,
-0.000748,
-0.000735,
-0.000722,
-0.000709,
-0.000696,
-0.000683,
-0.000670,
-0.000657,
-0.000645,
-0.000632,
-0.000620,
-0.000608,
-0.000595,
-0.000583,
-0.000571,
-0.000559,
-0.000547,
-0.000536,
-0.000524,
-0.000512,
-0.000501,
-0.000490,
-0.000479,
-0.000467,
-0.000456,
-0.000446,
-0.000435,
-0.000424,
-0.000414,
-0.000403,
-0.000393,
-0.000383,
-0.000373,
-0.000363,
-0.000353,
-0.000343,
-0.000333,
-0.000324,
-0.000315,
-0.000305,
-0.000296,
-0.000287,
-0.000278,
-0.000269,
-0.000261,
-0.000252,
-0.000244,
-0.000235,
-0.000227,
-0.000219,
-0.000211,
-0.000203,
-0.000196,
-0.000188,
-0.000181,
-0.000173,
-0.000166,
-0.000159,
-0.000152,
-0.000145,
-0.000138,
-0.000131,
-0.000125,
-0.000118,
-0.000112,
-0.000106,
-0.000100,
-0.000094,
-0.000088,
-0.000082,
-0.000077,
-0.000071,
-0.000066,
-0.000060,
-0.000055,
-0.000050,
-0.000045,
-0.000040,
-0.000035,
-0.000031,
-0.000026,
-0.000022,
-0.000017,
-0.000013,
-0.000009,
-0.000005,
-0.000001,
--0.000003,
--0.000007,
--0.000010,
--0.000014,
--0.000017,
--0.000021,
--0.000024,
--0.000027,
--0.000030,
--0.000033,
--0.000036,
--0.000039,
--0.000042,
--0.000044,
--0.000047,
--0.000049,
--0.000052,
--0.000054,
--0.000056,
--0.000059,
--0.000061,
--0.000063,
--0.000065,
--0.000066,
--0.000068,
--0.000070,
--0.000071,
--0.000073,
--0.000074,
--0.000076,
--0.000077,
--0.000078,
--0.000080,
--0.000081,
--0.000082,
--0.000083,
--0.000084,
--0.000085,
--0.000085,
--0.000086,
--0.000087,
--0.000087,
--0.000088,
--0.000089,
--0.000089,
--0.000089,
--0.000090,
--0.000090,
--0.000090,
--0.000091,
--0.000091,
--0.000091,
--0.000091,
--0.000091,
--0.000091,
--0.000091,
--0.000091,
--0.000091,
--0.000090,
--0.000090,
--0.000090,
--0.000090,
--0.000089,
--0.000089,
--0.000089,
--0.000088,
--0.000088,
--0.000087,
--0.000087,
--0.000086,
--0.000085,
--0.000085,
--0.000084,
--0.000084,
--0.000083,
--0.000082,
--0.000081,
--0.000081,
--0.000080,
--0.000079,
--0.000078,
--0.000077,
--0.000077,
--0.000076,
--0.000075,
--0.000074,
--0.000073,
--0.000072,
--0.000071,
--0.000070,
--0.000069,
--0.000068,
--0.000067,
--0.000066,
--0.000065,
--0.000064,
--0.000063,
--0.000062,
--0.000061,
--0.000060,
--0.000059,
--0.000058,
--0.000057,
--0.000056,
--0.000055,
--0.000054,
--0.000052,
--0.000051,
--0.000050,
--0.000049,
--0.000048,
--0.000047,
--0.000046
-};
-
-static const float SMALL_FILTER_FLOAT_IMPD[] /* Impulse response */ = {
--0.000020,
--0.000060,
--0.000100,
--0.000139,
--0.000179,
--0.000219,
--0.000259,
--0.000299,
--0.000338,
--0.000378,
--0.000418,
--0.000457,
--0.000497,
--0.000536,
--0.000576,
--0.000615,
--0.000655,
--0.000694,
--0.000733,
--0.000772,
--0.000812,
--0.000851,
--0.000890,
--0.000929,
--0.000967,
--0.001006,
--0.001045,
--0.001083,
--0.001122,
--0.001160,
--0.001199,
--0.001237,
--0.001275,
--0.001313,
--0.001351,
--0.001388,
--0.001426,
--0.001463,
--0.001501,
--0.001538,
--0.001575,
--0.001612,
--0.001649,
--0.001685,
--0.001722,
--0.001758,
--0.001794,
--0.001830,
--0.001866,
--0.001902,
--0.001938,
--0.001973,
--0.002008,
--0.002043,
--0.002078,
--0.002113,
--0.002147,
--0.002182,
--0.002216,
--0.002250,
--0.002284,
--0.002317,
--0.002350,
--0.002384,
--0.002417,
--0.002449,
--0.002482,
--0.002514,
--0.002546,
--0.002578,
--0.002610,
--0.002641,
--0.002672,
--0.002703,
--0.002734,
--0.002765,
--0.002795,
--0.002825,
--0.002855,
--0.002884,
--0.002913,
--0.002942,
--0.002971,
--0.003000,
--0.003028,
--0.003056,
--0.003084,
--0.003111,
--0.003139,
--0.003166,
--0.003192,
--0.003219,
--0.003245,
--0.003271,
--0.003296,
--0.003322,
--0.003347,
--0.003372,
--0.003396,
--0.003420,
--0.003444,
--0.003468,
--0.003491,
--0.003514,
--0.003537,
--0.003559,
--0.003582,
--0.003604,
--0.003625,
--0.003646,
--0.003667,
--0.003688,
--0.003708,
--0.003728,
--0.003748,
--0.003767,
--0.003787,
--0.003805,
--0.003824,
--0.003842,
--0.003860,
--0.003877,
--0.003895,
--0.003912,
--0.003928,
--0.003944,
--0.003960,
--0.003976,
--0.003991,
--0.004006,
--0.004021,
--0.004035,
--0.004049,
--0.004063,
--0.004076,
--0.004089,
--0.004102,
--0.004114,
--0.004126,
--0.004138,
--0.004149,
--0.004161,
--0.004171,
--0.004182,
--0.004192,
--0.004201,
--0.004211,
--0.004220,
--0.004229,
--0.004237,
--0.004245,
--0.004253,
--0.004260,
--0.004267,
--0.004274,
--0.004280,
--0.004286,
--0.004292,
--0.004297,
--0.004303,
--0.004307,
--0.004312,
--0.004316,
--0.004320,
--0.004323,
--0.004326,
--0.004329,
--0.004331,
--0.004333,
--0.004335,
--0.004337,
--0.004338,
--0.004339,
--0.004339,
--0.004339,
--0.004339,
--0.004338,
--0.004338,
--0.004337,
--0.004335,
--0.004333,
--0.004331,
--0.004329,
--0.004326,
--0.004323,
--0.004320,
--0.004316,
--0.004312,
--0.004308,
--0.004303,
--0.004298,
--0.004293,
--0.004288,
--0.004282,
--0.004276,
--0.004269,
--0.004263,
--0.004256,
--0.004248,
--0.004241,
--0.004233,
--0.004225,
--0.004216,
--0.004207,
--0.004198,
--0.004189,
--0.004179,
--0.004170,
--0.004159,
--0.004149,
--0.004138,
--0.004127,
--0.004116,
--0.004104,
--0.004092,
--0.004080,
--0.004068,
--0.004055,
--0.004043,
--0.004029,
--0.004016,
--0.004002,
--0.003988,
--0.003974,
--0.003960,
--0.003945,
--0.003930,
--0.003915,
--0.003900,
--0.003884,
--0.003868,
--0.003852,
--0.003836,
--0.003819,
--0.003803,
--0.003786,
--0.003768,
--0.003751,
--0.003733,
--0.003716,
--0.003697,
--0.003679,
--0.003661,
--0.003642,
--0.003623,
--0.003604,
--0.003585,
--0.003565,
--0.003545,
--0.003526,
--0.003506,
--0.003485,
--0.003465,
--0.003444,
--0.003423,
--0.003402,
--0.003381,
--0.003360,
--0.003339,
--0.003317,
--0.003295,
--0.003273,
--0.003251,
--0.003229,
--0.003206,
--0.003184,
--0.003161,
--0.003138,
--0.003115,
--0.003092,
--0.003069,
--0.003045,
--0.003022,
--0.002998,
--0.002974,
--0.002951,
--0.002927,
--0.002902,
--0.002878,
--0.002854,
--0.002829,
--0.002805,
--0.002780,
--0.002755,
--0.002731,
--0.002706,
--0.002681,
--0.002655,
--0.002630,
--0.002605,
--0.002580,
--0.002554,
--0.002529,
--0.002503,
--0.002477,
--0.002452,
--0.002426,
--0.002400,
--0.002374,
--0.002348,
--0.002322,
--0.002296,
--0.002270,
--0.002244,
--0.002218,
--0.002191,
--0.002165,
--0.002139,
--0.002113,
--0.002086,
--0.002060,
--0.002034,
--0.002007,
--0.001981,
--0.001954,
--0.001928,
--0.001901,
--0.001875,
--0.001849,
--0.001822,
--0.001796,
--0.001769,
--0.001743,
--0.001716,
--0.001690,
--0.001664,
--0.001637,
--0.001611,
--0.001585,
--0.001558,
--0.001532,
--0.001506,
--0.001480,
--0.001453,
--0.001427,
--0.001401,
--0.001375,
--0.001349,
--0.001323,
--0.001297,
--0.001271,
--0.001246,
--0.001220,
--0.001194,
--0.001169,
--0.001143,
--0.001118,
--0.001092,
--0.001067,
--0.001042,
--0.001016,
--0.000991,
--0.000966,
--0.000941,
--0.000916,
--0.000892,
--0.000867,
--0.000842,
--0.000818,
--0.000794,
--0.000769,
--0.000745,
--0.000721,
--0.000697,
--0.000673,
--0.000649,
--0.000626,
--0.000602,
--0.000579,
--0.000555,
--0.000532,
--0.000509,
--0.000486,
--0.000463,
--0.000440,
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=====================================
po/POTFILES.in
=====================================
@@ -235,7 +235,6 @@ modules/audio_filter/gain.c
modules/audio_filter/karaoke.c
modules/audio_filter/normvol.c
modules/audio_filter/param_eq.c
-modules/audio_filter/resampler/bandlimited.c
modules/audio_filter/resampler/soxr.c
modules/audio_filter/resampler/speex.c
modules/audio_filter/resampler/src.c
View it on GitLab:
https://code.videolan.org/videolan/vlc/-/commit/2e6614984555bf56c7933254fc432315894c1aec
--
View it on GitLab:
https://code.videolan.org/videolan/vlc/-/commit/2e6614984555bf56c7933254fc432315894c1aec
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