Main source file for the Speex resampler. More...

#include "saf_externals.h"
#include "speex_resampler.h"
#include "arch.h"
#include "os_support.h"
#include <math.h>
#include <limits.h>

Data Structures
struct	SpeexResamplerState

struct	FuncDef

struct	QualityMapping

Macros
#define	SPEEX_USE_CBLAS

#define	EXPORT

#define	M_PI 3.14159265358979323846

#define	IMAX(a, b) ((a) > (b) ? (a) : (b))

#define	IMIN(a, b) ((a) < (b) ? (a) : (b))

#define	NULL 0

#define	UINT32_MAX 4294967295U

#define	FIXED_STACK_ALLOC 1024

#define	KAISER12 (&kaiser12_funcdef)

#define	KAISER10 (&kaiser10_funcdef)

#define	KAISER8 (&kaiser8_funcdef)

#define	KAISER6 (&kaiser6_funcdef)

Typedefs
typedef int(*	resampler_basic_func) (SpeexResamplerState , spx_uint32_t, const spx_word16_t , spx_uint32_t , spx_word16_t , spx_uint32_t *)

Functions
static double	compute_func (float x, const struct FuncDef *func)

static spx_word16_t	sinc (float cutoff, float x, int N, const struct FuncDef *window_func)

static void	cubic_coef (spx_word16_t frac, spx_word16_t interp[4])

static int	resampler_basic_direct_single (SpeexResamplerState st, spx_uint32_t channel_index, const spx_word16_t in, spx_uint32_t in_len, spx_word16_t out, spx_uint32_t *out_len)

static int	resampler_basic_direct_double (SpeexResamplerState st, spx_uint32_t channel_index, const spx_word16_t in, spx_uint32_t in_len, spx_word16_t out, spx_uint32_t *out_len)

static int	resampler_basic_interpolate_single (SpeexResamplerState st, spx_uint32_t channel_index, const spx_word16_t in, spx_uint32_t in_len, spx_word16_t out, spx_uint32_t *out_len)

static int	resampler_basic_interpolate_double (SpeexResamplerState st, spx_uint32_t channel_index, const spx_word16_t in, spx_uint32_t in_len, spx_word16_t out, spx_uint32_t *out_len)

static int	resampler_basic_zero (SpeexResamplerState st, spx_uint32_t channel_index, const spx_word16_t in, spx_uint32_t in_len, spx_word16_t out, spx_uint32_t *out_len)

static int	multiply_frac (spx_uint32_t *result, spx_uint32_t value, spx_uint32_t num, spx_uint32_t den)

static int	update_filter (SpeexResamplerState *st)

EXPORT SpeexResamplerState *	speex_resampler_init (spx_uint32_t nb_channels, spx_uint32_t in_rate, spx_uint32_t out_rate, int quality, int *err)
	Create a new resampler with integer input and output rates.

EXPORT SpeexResamplerState *	speex_resampler_init_frac (spx_uint32_t nb_channels, spx_uint32_t ratio_num, spx_uint32_t ratio_den, spx_uint32_t in_rate, spx_uint32_t out_rate, int quality, int *err)
	Create a new resampler with fractional input/output rates.

EXPORT void	speex_resampler_destroy (SpeexResamplerState *st)
	Destroy a resampler state.

static int	speex_resampler_process_native (SpeexResamplerState st, spx_uint32_t channel_index, spx_uint32_t in_len, spx_word16_t out, spx_uint32_t out_len)

static int	speex_resampler_magic (SpeexResamplerState st, spx_uint32_t channel_index, spx_word16_t *out, spx_uint32_t out_len)

EXPORT int	speex_resampler_process_float (SpeexResamplerState st, spx_uint32_t channel_index, const float in, spx_uint32_t in_len, float out, spx_uint32_t *out_len)
	Resample a float array.

EXPORT int	speex_resampler_process_int (SpeexResamplerState st, spx_uint32_t channel_index, const spx_int16_t in, spx_uint32_t in_len, spx_int16_t out, spx_uint32_t *out_len)
	Resample an int array.

EXPORT int	speex_resampler_process_interleaved_float (SpeexResamplerState st, const float in, spx_uint32_t in_len, float out, spx_uint32_t *out_len)
	Resample an interleaved float array.

EXPORT int	speex_resampler_process_interleaved_int (SpeexResamplerState st, const spx_int16_t in, spx_uint32_t in_len, spx_int16_t out, spx_uint32_t *out_len)
	Resample an interleaved int array.

EXPORT int	speex_resampler_set_rate (SpeexResamplerState *st, spx_uint32_t in_rate, spx_uint32_t out_rate)
	Set (change) the input/output sampling rates (integer value).

EXPORT void	speex_resampler_get_rate (SpeexResamplerState st, spx_uint32_t in_rate, spx_uint32_t *out_rate)
	Get the current input/output sampling rates (integer value).

static spx_uint32_t	compute_gcd (spx_uint32_t a, spx_uint32_t b)

EXPORT int	speex_resampler_set_rate_frac (SpeexResamplerState *st, spx_uint32_t ratio_num, spx_uint32_t ratio_den, spx_uint32_t in_rate, spx_uint32_t out_rate)
	Set (change) the input/output sampling rates and resampling ratio (fractional values in Hz supported).

EXPORT void	speex_resampler_get_ratio (SpeexResamplerState st, spx_uint32_t ratio_num, spx_uint32_t *ratio_den)
	Get the current resampling ratio.

EXPORT int	speex_resampler_set_quality (SpeexResamplerState *st, int quality)
	Set (change) the conversion quality.

EXPORT void	speex_resampler_get_quality (SpeexResamplerState st, int quality)
	Get the conversion quality.

EXPORT void	speex_resampler_set_input_stride (SpeexResamplerState *st, spx_uint32_t stride)
	Set (change) the input stride.

EXPORT void	speex_resampler_get_input_stride (SpeexResamplerState st, spx_uint32_t stride)
	Get the input stride.

EXPORT void	speex_resampler_set_output_stride (SpeexResamplerState *st, spx_uint32_t stride)
	Set (change) the output stride.

EXPORT void	speex_resampler_get_output_stride (SpeexResamplerState st, spx_uint32_t stride)
	Get the output stride.

EXPORT int	speex_resampler_get_input_latency (SpeexResamplerState *st)
	Get the latency introduced by the resampler measured in input samples.

EXPORT int	speex_resampler_get_output_latency (SpeexResamplerState *st)
	Get the latency introduced by the resampler measured in output samples.

EXPORT int	speex_resampler_skip_zeros (SpeexResamplerState *st)
	Make sure that the first samples to go out of the resamplers don't have leading zeros.

EXPORT int	speex_resampler_reset_mem (SpeexResamplerState *st)
	Reset a resampler so a new (unrelated) stream can be processed.

EXPORT const char *	speex_resampler_strerror (int err)
	Returns the English meaning for an error code.

Variables
static const double	kaiser12_table [68]

static const double	kaiser10_table [36]

static const double	kaiser8_table [36]

static const double	kaiser6_table [36]

static const struct FuncDef	kaiser12_funcdef = {kaiser12_table, 64}

static const struct FuncDef	kaiser10_funcdef = {kaiser10_table, 32}

static const struct FuncDef	kaiser8_funcdef = {kaiser8_table, 32}

static const struct FuncDef	kaiser6_funcdef = {kaiser6_table, 32}

static const struct QualityMapping	quality_map [11]

Detailed Description

Main source file for the Speex resampler.

License: BSD 3-Clause

Definition in file resample.c.

Macro Definition Documentation

◆ EXPORT

#define EXPORT

Definition at line 93 of file resample.c.

◆ FIXED_STACK_ALLOC

#define FIXED_STACK_ALLOC 1024

Definition at line 122 of file resample.c.

◆ IMAX

#define IMAX	(		a,
			b ) ((a) > (b) ? (a) : (b))

Definition at line 99 of file resample.c.

◆ IMIN

#define IMIN	(		a,
			b ) ((a) < (b) ? (a) : (b))

Definition at line 100 of file resample.c.

◆ KAISER10

#define KAISER10 (&kaiser10_funcdef)

Definition at line 213 of file resample.c.

◆ KAISER12

#define KAISER12 (&kaiser12_funcdef)

Definition at line 211 of file resample.c.

◆ KAISER6

#define KAISER6 (&kaiser6_funcdef)

Definition at line 217 of file resample.c.

◆ KAISER8

#define KAISER8 (&kaiser8_funcdef)

Definition at line 215 of file resample.c.

◆ M_PI

#define M_PI 3.14159265358979323846

Definition at line 96 of file resample.c.

◆ NULL

#define NULL 0

Definition at line 103 of file resample.c.

◆ SPEEX_USE_CBLAS

#define SPEEX_USE_CBLAS

Definition at line 64 of file resample.c.

◆ UINT32_MAX

#define UINT32_MAX 4294967295U

Definition at line 107 of file resample.c.

Typedef Documentation

◆ resampler_basic_func

typedef int(* resampler_basic_func) (SpeexResamplerState *, spx_uint32_t, const spx_word16_t *, spx_uint32_t *, spx_word16_t *, spx_uint32_t *)

Definition at line 125 of file resample.c.

Function Documentation

◆ compute_func()

static double compute_func	(	float	x,
		const struct FuncDef *	func )

static

Definition at line 251 of file resample.c.

◆ compute_gcd()

static spx_uint32_t compute_gcd	(	spx_uint32_t	a,
		spx_uint32_t	b )

inlinestatic

Definition at line 1115 of file resample.c.

◆ cubic_coef()

static void cubic_coef	(	spx_word16_t	frac,
		spx_word16_t	interp[4] )

static

Definition at line 329 of file resample.c.

◆ multiply_frac()

static int multiply_frac	(	spx_uint32_t *	result,
		spx_uint32_t	value,
		spx_uint32_t	num,
		spx_uint32_t	den )

static

Definition at line 613 of file resample.c.

◆ resampler_basic_direct_double()

static int resampler_basic_direct_double	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		const spx_word16_t *	in,
		spx_uint32_t *	in_len,
		spx_word16_t *	out,
		spx_uint32_t *	out_len )

static

Definition at line 405 of file resample.c.

◆ resampler_basic_direct_single()

static int resampler_basic_direct_single	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		const spx_word16_t *	in,
		spx_uint32_t *	in_len,
		spx_word16_t *	out,
		spx_uint32_t *	out_len )

static

Definition at line 342 of file resample.c.

◆ resampler_basic_interpolate_double()

static int resampler_basic_interpolate_double	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		const spx_word16_t *	in,
		spx_uint32_t *	in_len,
		spx_word16_t *	out,
		spx_uint32_t *	out_len )

static

Definition at line 521 of file resample.c.

◆ resampler_basic_interpolate_single()

static int resampler_basic_interpolate_single	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		const spx_word16_t *	in,
		spx_uint32_t *	in_len,
		spx_word16_t *	out,
		spx_uint32_t *	out_len )

static

Definition at line 458 of file resample.c.

◆ resampler_basic_zero()

static int resampler_basic_zero	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		const spx_word16_t *	in,
		spx_uint32_t *	in_len,
		spx_word16_t *	out,
		spx_uint32_t *	out_len )

static

Definition at line 585 of file resample.c.

◆ sinc()

static spx_word16_t sinc	(	float	cutoff,
		float	x,
		int	N,
		const struct FuncDef *	window_func )

static

Definition at line 299 of file resample.c.

◆ speex_resampler_destroy()

EXPORT void speex_resampler_destroy ( SpeexResamplerState * st )

Destroy a resampler state.

Parameters

st	Resampler state

Definition at line 888 of file resample.c.

◆ speex_resampler_get_input_latency()

EXPORT int speex_resampler_get_input_latency ( SpeexResamplerState * st )

Get the latency introduced by the resampler measured in input samples.

Parameters

st	Resampler state

Definition at line 1210 of file resample.c.

◆ speex_resampler_get_input_stride()

EXPORT void speex_resampler_get_input_stride	(	SpeexResamplerState *	st,
		spx_uint32_t *	stride )

Get the input stride.

Parameters

st	Resampler state
stride	Input stride copied

Definition at line 1195 of file resample.c.

◆ speex_resampler_get_output_latency()

EXPORT int speex_resampler_get_output_latency ( SpeexResamplerState * st )

Get the latency introduced by the resampler measured in output samples.

Parameters

st	Resampler state

Definition at line 1215 of file resample.c.

◆ speex_resampler_get_output_stride()

EXPORT void speex_resampler_get_output_stride	(	SpeexResamplerState *	st,
		spx_uint32_t *	stride )

Get the output stride.

Parameters

st	Resampler state copied
stride	Output stride

Definition at line 1205 of file resample.c.

◆ speex_resampler_get_quality()

EXPORT void speex_resampler_get_quality	(	SpeexResamplerState *	st,
		int *	quality )

Get the conversion quality.

Parameters

st	Resampler state
quality	Resampling quality between 0 and 10, where 0 has poor quality and 10 has very high quality.

Definition at line 1185 of file resample.c.

◆ speex_resampler_get_rate()

EXPORT void speex_resampler_get_rate	(	SpeexResamplerState *	st,
		spx_uint32_t *	in_rate,
		spx_uint32_t *	out_rate )

Get the current input/output sampling rates (integer value).

Parameters

st	Resampler state
in_rate	Input sampling rate (integer number of Hz) copied.
out_rate	Output sampling rate (integer number of Hz) copied.

Definition at line 1109 of file resample.c.

◆ speex_resampler_get_ratio()

EXPORT void speex_resampler_get_ratio	(	SpeexResamplerState *	st,
		spx_uint32_t *	ratio_num,
		spx_uint32_t *	ratio_den )

Get the current resampling ratio.

This will be reduced to the least common denominator.

Parameters

st	Resampler state
ratio_num	Numerator of the sampling rate ratio copied
ratio_den	Denominator of the sampling rate ratio copied

Definition at line 1167 of file resample.c.

◆ speex_resampler_init()

EXPORT SpeexResamplerState * speex_resampler_init	(	spx_uint32_t	nb_channels,
		spx_uint32_t	in_rate,
		spx_uint32_t	out_rate,
		int	quality,
		int *	err )

Create a new resampler with integer input and output rates.

Parameters

nb_channels	Number of channels to be processed
in_rate	Input sampling rate (integer number of Hz).
out_rate	Output sampling rate (integer number of Hz).
quality	Resampling quality between 0 and 10, where 0 has poor quality and 10 has very high quality.

Returns: Newly created resampler state

Return values

NULL	Error: not enough memory

Definition at line 814 of file resample.c.

◆ speex_resampler_init_frac()

EXPORT SpeexResamplerState * speex_resampler_init_frac	(	spx_uint32_t	nb_channels,
		spx_uint32_t	ratio_num,
		spx_uint32_t	ratio_den,
		spx_uint32_t	in_rate,
		spx_uint32_t	out_rate,
		int	quality,
		int *	err )

Create a new resampler with fractional input/output rates.

The sampling rate ratio is an arbitrary rational number with both the numerator and denominator being 32-bit integers.

Parameters

nb_channels	Number of channels to be processed
ratio_num	Numerator of the sampling rate ratio
ratio_den	Denominator of the sampling rate ratio
in_rate	Input sampling rate rounded to the nearest integer (in Hz).
out_rate	Output sampling rate rounded to the nearest integer (in Hz).
quality	Resampling quality between 0 and 10, where 0 has poor quality and 10 has very high quality.

Returns: Newly created resampler state

Return values

NULL	Error: not enough memory

Definition at line 819 of file resample.c.

◆ speex_resampler_magic()

static int speex_resampler_magic	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		spx_word16_t **	out,
		spx_uint32_t	out_len )

static

Definition at line 924 of file resample.c.

◆ speex_resampler_process_float()

EXPORT int speex_resampler_process_float	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		const float *	in,
		spx_uint32_t *	in_len,
		float *	out,
		spx_uint32_t *	out_len )

Resample a float array.

The input and output buffers must not overlap.

Parameters

st	Resampler state
channel_index	Index of the channel to process for the multi-channel base (0 otherwise)
in	Input buffer
in_len	Number of input samples in the input buffer. Returns the number of samples processed
out	Output buffer
out_len	Size of the output buffer. Returns the number of samples written

Definition at line 947 of file resample.c.

◆ speex_resampler_process_int()

EXPORT int speex_resampler_process_int	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		const spx_int16_t *	in,
		spx_uint32_t *	in_len,
		spx_int16_t *	out,
		spx_uint32_t *	out_len )

Resample an int array.

The input and output buffers must not overlap.

Parameters

st	Resampler state
channel_index	Index of the channel to process for the multi-channel base (0 otherwise)
in	Input buffer
in_len	Number of input samples in the input buffer. Returns the number of samples processed
out	Output buffer
out_len	Size of the output buffer. Returns the number of samples written

Definition at line 988 of file resample.c.

◆ speex_resampler_process_interleaved_float()

EXPORT int speex_resampler_process_interleaved_float	(	SpeexResamplerState *	st,
		const float *	in,
		spx_uint32_t *	in_len,
		float *	out,
		spx_uint32_t *	out_len )

Resample an interleaved float array.

The input and output buffers must not overlap.

Parameters

st	Resampler state
in	Input buffer
in_len	Number of input samples in the input buffer. Returns the number of samples processed. This is all per-channel.
out	Output buffer
out_len	Size of the output buffer. Returns the number of samples written. This is all per-channel.

Definition at line 1058 of file resample.c.

◆ speex_resampler_process_interleaved_int()

EXPORT int speex_resampler_process_interleaved_int	(	SpeexResamplerState *	st,
		const spx_int16_t *	in,
		spx_uint32_t *	in_len,
		spx_int16_t *	out,
		spx_uint32_t *	out_len )

Resample an interleaved int array.

The input and output buffers must not overlap.

Parameters

st	Resampler state
in	Input buffer
in_len	Number of input samples in the input buffer. Returns the number of samples processed. This is all per-channel.
out	Output buffer
out_len	Size of the output buffer. Returns the number of samples written. This is all per-channel.

Definition at line 1081 of file resample.c.

◆ speex_resampler_process_native()

static int speex_resampler_process_native	(	SpeexResamplerState *	st,
		spx_uint32_t	channel_index,
		spx_uint32_t *	in_len,
		spx_word16_t *	out,
		spx_uint32_t *	out_len )

static

Definition at line 898 of file resample.c.

◆ speex_resampler_reset_mem()

EXPORT int speex_resampler_reset_mem ( SpeexResamplerState * st )

Reset a resampler so a new (unrelated) stream can be processed.

Parameters

st	Resampler state

Definition at line 1228 of file resample.c.

◆ speex_resampler_set_input_stride()

EXPORT void speex_resampler_set_input_stride	(	SpeexResamplerState *	st,
		spx_uint32_t	stride )

Set (change) the input stride.

Parameters

st	Resampler state
stride	Input stride

Definition at line 1190 of file resample.c.

◆ speex_resampler_set_output_stride()

EXPORT void speex_resampler_set_output_stride	(	SpeexResamplerState *	st,
		spx_uint32_t	stride )

Set (change) the output stride.

Parameters

st	Resampler state
stride	Output stride

Definition at line 1200 of file resample.c.

◆ speex_resampler_set_quality()

EXPORT int speex_resampler_set_quality	(	SpeexResamplerState *	st,
		int	quality )

Set (change) the conversion quality.

Parameters

st	Resampler state
quality	Resampling quality between 0 and 10, where 0 has poor quality and 10 has very high quality.

Definition at line 1173 of file resample.c.

◆ speex_resampler_set_rate()

EXPORT int speex_resampler_set_rate	(	SpeexResamplerState *	st,
		spx_uint32_t	in_rate,
		spx_uint32_t	out_rate )

Set (change) the input/output sampling rates (integer value).

Parameters

st	Resampler state
in_rate	Input sampling rate (integer number of Hz).
out_rate	Output sampling rate (integer number of Hz).

Definition at line 1104 of file resample.c.

◆ speex_resampler_set_rate_frac()

EXPORT int speex_resampler_set_rate_frac	(	SpeexResamplerState *	st,
		spx_uint32_t	ratio_num,
		spx_uint32_t	ratio_den,
		spx_uint32_t	in_rate,
		spx_uint32_t	out_rate )

Set (change) the input/output sampling rates and resampling ratio (fractional values in Hz supported).

Parameters

st	Resampler state
ratio_num	Numerator of the sampling rate ratio
ratio_den	Denominator of the sampling rate ratio
in_rate	Input sampling rate rounded to the nearest integer (in Hz).
out_rate	Output sampling rate rounded to the nearest integer (in Hz).

Definition at line 1127 of file resample.c.

◆ speex_resampler_skip_zeros()

EXPORT int speex_resampler_skip_zeros ( SpeexResamplerState * st )

Make sure that the first samples to go out of the resamplers don't have leading zeros.

This is only useful before starting to use a newly created resampler. It is recommended to use that when resampling an audio file, as it will generate a file with the same length. For real-time processing, it is probably easier not to use this call (so that the output duration is the same for the first frame).

Parameters

st	Resampler state

Definition at line 1220 of file resample.c.

◆ speex_resampler_strerror()

EXPORT const char * speex_resampler_strerror ( int err )

Returns the English meaning for an error code.

Parameters

err	Error code

Returns: English string

Definition at line 1242 of file resample.c.

◆ update_filter()

static int update_filter ( SpeexResamplerState * st )

static

Definition at line 625 of file resample.c.

Variable Documentation

◆ kaiser10_funcdef

const struct FuncDef kaiser10_funcdef = {kaiser10_table, 32}

static

Definition at line 212 of file resample.c.

◆ kaiser10_table

const double kaiser10_table[36]

static

Initial value:

= {
99537781, 1.00000000, 0.99537781, 0.98162644, 0.95908712, 0.92831446,
89005583, 0.84522401, 0.79486424, 0.74011713, 0.68217934, 0.62226347,
56155915, 0.50119680, 0.44221549, 0.38553619, 0.33194107, 0.28205962,
23636152, 0.19515633, 0.15859932, 0.12670280, 0.09935205, 0.07632451,
05731132, 0.04193980, 0.02979584, 0.02044510, 0.01345224, 0.00839739,
00488951, 0.00257636, 0.00115101, 0.00035515, 0.00000000, 0.00000000}

Definition at line 181 of file resample.c.

◆ kaiser12_funcdef

const struct FuncDef kaiser12_funcdef = {kaiser12_table, 64}

static

Definition at line 210 of file resample.c.

◆ kaiser12_table

const double kaiser12_table[68]

static

Initial value:

= {
99859849, 1.00000000, 0.99859849, 0.99440475, 0.98745105, 0.97779076,
96549770, 0.95066529, 0.93340547, 0.91384741, 0.89213598, 0.86843014,
84290116, 0.81573067, 0.78710866, 0.75723148, 0.72629970, 0.69451601,
66208321, 0.62920216, 0.59606986, 0.56287762, 0.52980938, 0.49704014,
46473455, 0.43304576, 0.40211431, 0.37206735, 0.34301800, 0.31506490,
28829195, 0.26276832, 0.23854851, 0.21567274, 0.19416736, 0.17404546,
15530766, 0.13794294, 0.12192957, 0.10723616, 0.09382272, 0.08164178,
07063950, 0.06075685, 0.05193064, 0.04409466, 0.03718069, 0.03111947,
02584161, 0.02127838, 0.01736250, 0.01402878, 0.01121463, 0.00886058,
00691064, 0.00531256, 0.00401805, 0.00298291, 0.00216702, 0.00153438,
00105297, 0.00069463, 0.00043489, 0.00025272, 0.00013031, 0.0000527734,
00001000, 0.00000000}

Definition at line 159 of file resample.c.

◆ kaiser6_funcdef

const struct FuncDef kaiser6_funcdef = {kaiser6_table, 32}

static

Definition at line 216 of file resample.c.

◆ kaiser6_table

const double kaiser6_table[36]

static

Initial value:

= {
99733006, 1.00000000, 0.99733006, 0.98935595, 0.97618418, 0.95799003,
93501423, 0.90755855, 0.87598009, 0.84068475, 0.80211977, 0.76076565,
71712752, 0.67172623, 0.62508937, 0.57774224, 0.53019925, 0.48295561,
43647969, 0.39120616, 0.34752997, 0.30580127, 0.26632152, 0.22934058,
19505503, 0.16360756, 0.13508755, 0.10953262, 0.08693120, 0.06722600,
05031820, 0.03607231, 0.02432151, 0.01487334, 0.00752000, 0.00000000}

Definition at line 197 of file resample.c.

◆ kaiser8_funcdef

const struct FuncDef kaiser8_funcdef = {kaiser8_table, 32}

static

Definition at line 214 of file resample.c.

◆ kaiser8_table

const double kaiser8_table[36]

static

Initial value:

= {
99635258, 1.00000000, 0.99635258, 0.98548012, 0.96759014, 0.94302200,
91223751, 0.87580811, 0.83439927, 0.78875245, 0.73966538, 0.68797126,
63451750, 0.58014482, 0.52566725, 0.47185369, 0.41941150, 0.36897272,
32108304, 0.27619388, 0.23465776, 0.19672670, 0.16255380, 0.13219758,
10562887, 0.08273982, 0.06335451, 0.04724088, 0.03412321, 0.02369490,
01563093, 0.00959968, 0.00527363, 0.00233883, 0.00050000, 0.00000000}

Definition at line 189 of file resample.c.

◆ quality_map

const struct QualityMapping quality_map[11]

static

Initial value:

= {
   {  8,  4, 0.830f, 0.860f, KAISER6 }, 
   { 16,  4, 0.850f, 0.880f, KAISER6 }, 
   { 32,  4, 0.882f, 0.910f, KAISER6 },   
   { 48,  8, 0.895f, 0.917f, KAISER8 },   
   { 64,  8, 0.921f, 0.940f, KAISER8 },   
   { 80, 16, 0.922f, 0.940f, KAISER10},   
   { 96, 16, 0.940f, 0.945f, KAISER10},   
   {128, 16, 0.950f, 0.950f, KAISER10},   
   {160, 16, 0.960f, 0.960f, KAISER10},   
   {192, 32, 0.968f, 0.968f, KAISER12},   
   {256, 32, 0.975f, 0.975f, KAISER12},  
}

Definition at line 237 of file resample.c.

Data Structures

Macros

Typedefs

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ EXPORT

◆ FIXED_STACK_ALLOC

◆ IMAX

◆ IMIN

◆ KAISER10

◆ KAISER12

◆ KAISER6

◆ KAISER8

◆ M_PI

◆ NULL

◆ SPEEX_USE_CBLAS

◆ UINT32_MAX

Typedef Documentation

◆ resampler_basic_func

Function Documentation

◆ compute_func()

◆ compute_gcd()

◆ cubic_coef()

◆ multiply_frac()

◆ resampler_basic_direct_double()

◆ resampler_basic_direct_single()

◆ resampler_basic_interpolate_double()

◆ resampler_basic_interpolate_single()

◆ resampler_basic_zero()

◆ sinc()

◆ speex_resampler_destroy()

◆ speex_resampler_get_input_latency()

◆ speex_resampler_get_input_stride()

◆ speex_resampler_get_output_latency()

◆ speex_resampler_get_output_stride()

◆ speex_resampler_get_quality()

◆ speex_resampler_get_rate()

◆ speex_resampler_get_ratio()

◆ speex_resampler_init()

◆ speex_resampler_init_frac()

◆ speex_resampler_magic()

◆ speex_resampler_process_float()

◆ speex_resampler_process_int()

◆ speex_resampler_process_interleaved_float()

◆ speex_resampler_process_interleaved_int()

◆ speex_resampler_process_native()

◆ speex_resampler_reset_mem()

◆ speex_resampler_set_input_stride()

◆ speex_resampler_set_output_stride()

◆ speex_resampler_set_quality()

◆ speex_resampler_set_rate()

◆ speex_resampler_set_rate_frac()

◆ speex_resampler_skip_zeros()

◆ speex_resampler_strerror()

◆ update_filter()

Variable Documentation

◆ kaiser10_funcdef

◆ kaiser10_table

◆ kaiser12_funcdef

◆ kaiser12_table

◆ kaiser6_funcdef

◆ kaiser6_table

◆ kaiser8_funcdef

◆ kaiser8_table

◆ quality_map