#include <dev/sound/pcm/sound.h>
#include <dev/sound/pcm/pcm.h>
#include "feeder_if.h"
#include "snd_fxdiv_gen.h"
#include "feeder_rate_gen.h"

Include dependency graph for feeder_rate.c:

Go to the source code of this file.

Data Structures
struct	z_info

Macros
#define	SND_USE_FXDIV

#define	Z_QUALITY_DEFAULT Z_QUALITY_LINEAR

#define	Z_RESERVOIR 2048

#define	Z_RESERVOIR_MAX 131072

#define	Z_SINC_MAX 0x3fffff

#define	Z_SINC_DOWNMAX 48 /* 384000 / 8000 */

#define	Z_POLYPHASE_MAX 183040 /* 286 taps, 640 phases */

#define	Z_RATE_DEFAULT 48000

#define	Z_RATE_MIN FEEDRATE_RATEMIN

#define	Z_RATE_MAX FEEDRATE_RATEMAX

#define	Z_ROUNDHZ FEEDRATE_ROUNDHZ

#define	Z_ROUNDHZ_MIN FEEDRATE_ROUNDHZ_MIN

#define	Z_ROUNDHZ_MAX FEEDRATE_ROUNDHZ_MAX

#define	Z_RATE_SRC FEEDRATE_SRC

#define	Z_RATE_DST FEEDRATE_DST

#define	Z_RATE_QUALITY FEEDRATE_QUALITY

#define	Z_RATE_CHANNELS FEEDRATE_CHANNELS

#define	Z_PARANOID 1

#define	Z_MULTIFORMAT 1

#define	Z_USE_ALPHADRIFT 1

#define	Z_FACTOR_MIN 1

#define	Z_FACTOR_MAX Z_MASK

#define	Z_FACTOR_SAFE(v) (!((v) < Z_FACTOR_MIN \|\| (v) > Z_FACTOR_MAX))

#define	Z_IS_ZOH(i) ((i)->quality == Z_QUALITY_ZOH)

#define	Z_IS_LINEAR(i) ((i)->quality == Z_QUALITY_LINEAR)

#define	Z_IS_SINC(i) ((i)->quality > Z_QUALITY_LINEAR)

#define	_Z_GCAST(x) ((uint64_t)(x))

#define	Z_DIV(x, y) ((x) / (y))

#define	_Z_GY2GX(i, a, v)

#define	_Z_GX2GY(i, a, v) Z_DIV(((_Z_GCAST((i)->z_gy) * (v)) + (a)), (i)->z_gx)

#define	_Z_DRIFT(i, x, y) ((_Z_GCAST((i)->z_gy) * (x)) - (_Z_GCAST((i)->z_gx) * (y)))

#define	z_gy2gx(i, v) _Z_GY2GX(i, (i)->z_alpha, v)

#define	z_gx2gy(i, v) _Z_GX2GY(i, (i)->z_alpha, v)

#define	z_drift(i, x, y) _Z_DRIFT(i, x, y)

#define	Z_SINC_COEFF_IDX(i) ((i)->quality - Z_QUALITY_LINEAR - 1)

#define	Z_SINC_LEN(i)

#define	Z_SINC_BASE_LEN(i) ((z_coeff_tab[Z_SINC_COEFF_IDX(i)].len - 1) >> (Z_DRIFT_SHIFT - 1))

#define	z_align(i, v) ((v) & (i)->z_mask)

#define	z_next(i, o, v) z_align(i, (o) + (v))

#define	z_prev(i, o, v) z_align(i, (o) - (v))

#define	z_fetched(i) (z_align(i, (i)->z_pos - (i)->z_start) - 1)

#define	z_free(i) ((i)->z_full - (i)->z_pos)

#define	z_copy(src, dst, sz) (void)memcpy(dst, src, sz)

#define	z_feed(...) FEEDER_FEED(__VA_ARGS__)

#define	Z_DECLARE_LINEAR(SIGN, BIT, ENDIAN)

#define	Z_CLIP_CHECK(...)

#define	Z_CLAMP(v, BIT)

#define	_Z_SINC_ACCUMULATE(SIGN, BIT, ENDIAN, adv)

#define	Z_SINC_ACCUMULATE(...)

#define	Z_SINC_ACCUMULATE_DECR 1

#define	Z_DECLARE_SINC(SIGN, BIT, ENDIAN)

#define	Z_DECLARE_SINC_POLYPHASE(SIGN, BIT, ENDIAN)

#define	Z_DECLARE(SIGN, BIT, ENDIAN)

#define	Z_RESAMPLER_IDX(i) (Z_IS_SINC(i) ? Z_RESAMPLER_SINC : (i)->quality)

#define	Z_RESAMPLER_ENTRY(SIGN, BIT, ENDIAN)

#define	Z_RESAMPLER_TAB_SIZE ((int32_t)(sizeof(z_resampler_tab) / sizeof(z_resampler_tab[0])))

#define	Z_POLYPHASE_COEFF_SHIFT 0

Typedefs
typedef void(*	z_resampler_t) (struct z_info , uint8_t )

Enumerations
enum	{ Z_RESAMPLER_ZOH , Z_RESAMPLER_LINEAR , Z_RESAMPLER_SINC , Z_RESAMPLER_SINC_POLYPHASE , Z_RESAMPLER_LAST }

Functions
	SND_DECLARE_FILE ("$FreeBSD$")

	SYSCTL_STRING (_hw_snd, OID_AUTO, feeder_rate_presets, CTLFLAG_RD, &feeder_rate_presets, 0, "compile-time rate presets")

	SYSCTL_INT (_hw_snd, OID_AUTO, feeder_rate_polyphase_max, CTLFLAG_RWTUN, &feeder_rate_polyphase_max, 0, "maximum allowable polyphase entries")

static int	sysctl_hw_snd_feeder_rate_min (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_hw_snd, OID_AUTO, feeder_rate_min, CTLTYPE_INT\|CTLFLAG_RWTUN\|CTLFLAG_MPSAFE, 0, sizeof(int), sysctl_hw_snd_feeder_rate_min, "I", "minimum allowable rate")

static int	sysctl_hw_snd_feeder_rate_max (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_hw_snd, OID_AUTO, feeder_rate_max, CTLTYPE_INT\|CTLFLAG_RWTUN\|CTLFLAG_MPSAFE, 0, sizeof(int), sysctl_hw_snd_feeder_rate_max, "I", "maximum allowable rate")

static int	sysctl_hw_snd_feeder_rate_round (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_hw_snd, OID_AUTO, feeder_rate_round, CTLTYPE_INT\|CTLFLAG_RWTUN\|CTLFLAG_MPSAFE, 0, sizeof(int), sysctl_hw_snd_feeder_rate_round, "I", "sample rate converter rounding threshold")

static int	sysctl_hw_snd_feeder_rate_quality (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_hw_snd, OID_AUTO, feeder_rate_quality, CTLTYPE_INT\|CTLFLAG_RWTUN\|CTLFLAG_NEEDGIANT, 0, sizeof(int), sysctl_hw_snd_feeder_rate_quality, "I", "sample rate converter quality ("__XSTRING(Z_QUALITY_MIN)"=low .. " __XSTRING(Z_QUALITY_MAX)"=high)")

static __inline uint32_t	z_min (uint32_t x, uint32_t y)

static int32_t	z_gcd (int32_t x, int32_t y)

static int32_t	z_roundpow2 (int32_t v)

static void	z_feed_zoh (struct z_info info, uint8_t dst)

static void	z_resampler_reset (struct z_info *info)

static int32_t	z_resampler_sinc_len (struct z_info *info)

static int32_t	z_coeff_interpolate (int32_t z, int32_t *z_coeff)

static int	z_resampler_build_polyphase (struct z_info *info)

static int	z_resampler_setup (struct pcm_feeder *f)

static int	z_resampler_set (struct pcm_feeder *f, int what, int32_t value)

static int	z_resampler_get (struct pcm_feeder *f, int what)

static int	z_resampler_init (struct pcm_feeder *f)

static int	z_resampler_free (struct pcm_feeder *f)

static uint32_t	z_resampler_feed_internal (struct pcm_feeder f, struct pcm_channel c, uint8_t b, uint32_t count, void source)

static int	z_resampler_feed (struct pcm_feeder f, struct pcm_channel c, uint8_t b, uint32_t count, void source)

	FEEDER_DECLARE (feeder_rate, NULL)

Variables
int	feeder_rate_min = Z_RATE_MIN

int	feeder_rate_max = Z_RATE_MAX

int	feeder_rate_round = Z_ROUNDHZ

int	feeder_rate_quality = Z_QUALITY_DEFAULT

static int	feeder_rate_polyphase_max = Z_POLYPHASE_MAX

static char	feeder_rate_presets [] = FEEDER_RATE_PRESETS

struct {
uint32_t format

z_resampler_t resampler [Z_RESAMPLER_LAST]

}	z_resampler_tab []

static struct pcm_feederdesc	feeder_rate_desc []

static kobj_method_t	feeder_rate_methods []

Macro Definition Documentation

◆ _Z_DRIFT

#define _Z_DRIFT	(	i,
		x,
		y
	)	((_Z_GCAST((i)->z_gy) * (x)) - (_Z_GCAST((i)->z_gx) * (y)))

Definition at line 354 of file feeder_rate.c.

◆ _Z_GCAST

#define _Z_GCAST ( x ) ((uint64_t)(x))

Definition at line 311 of file feeder_rate.c.

◆ _Z_GX2GY

#define _Z_GX2GY	(	i,
		a,
		v
	)	Z_DIV(((_Z_GCAST((i)->z_gy) * (v)) + (a)), (i)->z_gx)

Definition at line 351 of file feeder_rate.c.

◆ _Z_GY2GX

#define _Z_GY2GX	(	i,
		a,
		v
	)

Value:

Z_DIV(((_Z_GCAST((i)->z_gx) * (v)) + ((i)->z_gy - (a) - 1)), \

(i)->z_gy)

_Z_GCAST

#define _Z_GCAST(x)

Definition: feeder_rate.c:311

Z_DIV

#define Z_DIV(x, y)

Definition: feeder_rate.c:344

Definition at line 347 of file feeder_rate.c.

◆ _Z_SINC_ACCUMULATE

#define _Z_SINC_ACCUMULATE	(	SIGN,
		BIT,
		ENDIAN,
		adv
	)

Value:

        c += z >> Z_SHIFT;                                              \
        z &= Z_MASK;                                                    \
        coeff = Z_COEFF_INTERPOLATE(z, z_coeff[c], z_dcoeff[c]);        \
        x = _PCM_READ_##SIGN##BIT##_##ENDIAN(p);                        \
        v += Z_NORM_##BIT((intpcm64_t)x * coeff);                       \
        z += info->z_dy;                                                \
        p adv##= info->channels * PCM_##BIT##_BPS

Definition at line 523 of file feeder_rate.c.

◆ SND_USE_FXDIV

#define SND_USE_FXDIV

Definition at line 61 of file feeder_rate.c.

◆ z_align

#define z_align	(	i,
		v
	)	((v) & (i)->z_mask)

Definition at line 380 of file feeder_rate.c.

◆ Z_CLAMP

#define Z_CLAMP	(	v,
		BIT
	)

Value:

(((v) > PCM_S##BIT##_MAX) ? PCM_S##BIT##_MAX : \

(((v) < PCM_S##BIT##_MIN) ? PCM_S##BIT##_MIN : (v)))

Definition at line 513 of file feeder_rate.c.

◆ Z_CLIP_CHECK

#define Z_CLIP_CHECK ( ... )

Definition at line 510 of file feeder_rate.c.

◆ z_copy

#define z_copy	(	src,
		dst,
		sz
	)	(void)memcpy(dst, src, sz)

Definition at line 389 of file feeder_rate.c.

◆ Z_DECLARE

#define Z_DECLARE	(	SIGN,
		BIT,
		ENDIAN
	)

Value:

        Z_DECLARE_LINEAR(SIGN, BIT, ENDIAN)                             \
        Z_DECLARE_SINC(SIGN, BIT, ENDIAN)                               \
        Z_DECLARE_SINC_POLYPHASE(SIGN, BIT, ENDIAN)

Definition at line 628 of file feeder_rate.c.

◆ Z_DECLARE_LINEAR

#define Z_DECLARE_LINEAR	(	SIGN,
		BIT,
		ENDIAN
	)

Value:

static void                                                                     \
z_feed_linear_##SIGN##BIT##ENDIAN(struct z_info *info, uint8_t *dst)            \
{                                                                               \
        int32_t z;                                                              \
        intpcm_t x, y;                                                          \
        uint32_t ch;                                                            \
        uint8_t *sx, *sy;                                                       \
                                                                                \
        z = ((uint32_t)info->z_alpha * info->z_dx) >> Z_LINEAR_UNSHIFT;         \
                                                                                \
        sx = info->z_delay + (info->z_start * info->channels *                  \
            PCM_##BIT##_BPS);                                                   \
        sy = sx - (info->channels * PCM_##BIT##_BPS);                           \
                                                                                \
        ch = info->channels;                                                    \
                                                                                \
        do {                                                                    \
                x = _PCM_READ_##SIGN##BIT##_##ENDIAN(sx);                       \
                y = _PCM_READ_##SIGN##BIT##_##ENDIAN(sy);                       \
                x = Z_LINEAR_INTERPOLATE_##BIT(z, x, y);                        \
                _PCM_WRITE_##SIGN##BIT##_##ENDIAN(dst, x);                      \
                sx += PCM_##BIT##_BPS;                                          \
                sy += PCM_##BIT##_BPS;                                          \
                dst += PCM_##BIT##_BPS;                                         \
        } while (--ch != 0);                                                    \
}

Definition at line 464 of file feeder_rate.c.

◆ Z_DECLARE_SINC

#define Z_DECLARE_SINC	(	SIGN,
		BIT,
		ENDIAN
	)

Definition at line 548 of file feeder_rate.c.

◆ Z_DECLARE_SINC_POLYPHASE

#define Z_DECLARE_SINC_POLYPHASE	(	SIGN,
		BIT,
		ENDIAN
	)

Definition at line 589 of file feeder_rate.c.

◆ Z_DIV

#define Z_DIV	(	x,
		y
	)	((x) / (y))

Definition at line 344 of file feeder_rate.c.

◆ z_drift

#define z_drift	(	i,
		x,
		y
	)	_Z_DRIFT(i, x, y)

Definition at line 359 of file feeder_rate.c.

◆ Z_FACTOR_MAX

#define Z_FACTOR_MAX Z_MASK

Definition at line 115 of file feeder_rate.c.

◆ Z_FACTOR_MIN

#define Z_FACTOR_MIN 1

Definition at line 114 of file feeder_rate.c.

◆ Z_FACTOR_SAFE

#define Z_FACTOR_SAFE ( v ) (!((v) < Z_FACTOR_MIN || (v) > Z_FACTOR_MAX))

Definition at line 116 of file feeder_rate.c.

◆ z_feed

#define z_feed ( ... ) FEEDER_FEED(__VA_ARGS__)

Definition at line 390 of file feeder_rate.c.

◆ z_fetched

#define z_fetched ( i ) (z_align(i, (i)->z_pos - (i)->z_start) - 1)

Definition at line 383 of file feeder_rate.c.

◆ z_free

#define z_free ( i ) ((i)->z_full - (i)->z_pos)

Definition at line 384 of file feeder_rate.c.

◆ z_gx2gy

#define z_gx2gy	(	i,
		v
	)	_Z_GX2GY(i, (i)->z_alpha, v)

Definition at line 358 of file feeder_rate.c.

◆ z_gy2gx

#define z_gy2gx	(	i,
		v
	)	_Z_GY2GX(i, (i)->z_alpha, v)

Definition at line 357 of file feeder_rate.c.

◆ Z_IS_LINEAR

#define Z_IS_LINEAR ( i ) ((i)->quality == Z_QUALITY_LINEAR)

Definition at line 298 of file feeder_rate.c.

◆ Z_IS_SINC

#define Z_IS_SINC ( i ) ((i)->quality > Z_QUALITY_LINEAR)

Definition at line 299 of file feeder_rate.c.

◆ Z_IS_ZOH

#define Z_IS_ZOH ( i ) ((i)->quality == Z_QUALITY_ZOH)

Definition at line 297 of file feeder_rate.c.

◆ Z_MULTIFORMAT

#define Z_MULTIFORMAT 1

Definition at line 107 of file feeder_rate.c.

◆ z_next

#define z_next	(	i,
		o,
		v
	)	z_align(i, (o) + (v))

Definition at line 381 of file feeder_rate.c.

◆ Z_PARANOID

#define Z_PARANOID 1

Definition at line 105 of file feeder_rate.c.

◆ Z_POLYPHASE_COEFF_SHIFT

#define Z_POLYPHASE_COEFF_SHIFT 0

Definition at line 779 of file feeder_rate.c.

◆ Z_POLYPHASE_MAX

#define Z_POLYPHASE_MAX 183040 /* 286 taps, 640 phases */

Definition at line 87 of file feeder_rate.c.

◆ z_prev

#define z_prev	(	i,
		o,
		v
	)	z_align(i, (o) - (v))

Definition at line 382 of file feeder_rate.c.

◆ Z_QUALITY_DEFAULT

#define Z_QUALITY_DEFAULT Z_QUALITY_LINEAR

Definition at line 77 of file feeder_rate.c.

◆ Z_RATE_CHANNELS

#define Z_RATE_CHANNELS FEEDRATE_CHANNELS

Definition at line 103 of file feeder_rate.c.

◆ Z_RATE_DEFAULT

#define Z_RATE_DEFAULT 48000

Definition at line 92 of file feeder_rate.c.

◆ Z_RATE_DST

#define Z_RATE_DST FEEDRATE_DST

Definition at line 101 of file feeder_rate.c.

◆ Z_RATE_MAX

#define Z_RATE_MAX FEEDRATE_RATEMAX

Definition at line 95 of file feeder_rate.c.

◆ Z_RATE_MIN

#define Z_RATE_MIN FEEDRATE_RATEMIN

Definition at line 94 of file feeder_rate.c.

◆ Z_RATE_QUALITY

#define Z_RATE_QUALITY FEEDRATE_QUALITY

Definition at line 102 of file feeder_rate.c.

◆ Z_RATE_SRC

#define Z_RATE_SRC FEEDRATE_SRC

Definition at line 100 of file feeder_rate.c.

◆ Z_RESAMPLER_ENTRY

#define Z_RESAMPLER_ENTRY	(	SIGN,
		BIT,
		ENDIAN
	)

Value:

        {                                                                       \
            AFMT_##SIGN##BIT##_##ENDIAN,                                        \
            {                                                                   \
                [Z_RESAMPLER_ZOH]    = z_feed_zoh,                              \
                [Z_RESAMPLER_LINEAR] = z_feed_linear_##SIGN##BIT##ENDIAN,       \
                [Z_RESAMPLER_SINC]   = z_feed_sinc_##SIGN##BIT##ENDIAN,         \
                [Z_RESAMPLER_SINC_POLYPHASE]   =                                \
                    z_feed_sinc_polyphase_##SIGN##BIT##ENDIAN                   \
            }                                                                   \
        }

Definition at line 665 of file feeder_rate.c.

◆ Z_RESAMPLER_IDX

#define Z_RESAMPLER_IDX ( i ) (Z_IS_SINC(i) ? Z_RESAMPLER_SINC : (i)->quality)

Definition at line 662 of file feeder_rate.c.

◆ Z_RESAMPLER_TAB_SIZE

#define Z_RESAMPLER_TAB_SIZE ((int32_t)(sizeof(z_resampler_tab) / sizeof(z_resampler_tab[0])))

Definition at line 703 of file feeder_rate.c.

◆ Z_RESERVOIR

#define Z_RESERVOIR 2048

Definition at line 80 of file feeder_rate.c.

◆ Z_RESERVOIR_MAX

#define Z_RESERVOIR_MAX 131072

Definition at line 81 of file feeder_rate.c.

◆ Z_ROUNDHZ

#define Z_ROUNDHZ FEEDRATE_ROUNDHZ

Definition at line 96 of file feeder_rate.c.

◆ Z_ROUNDHZ_MAX

#define Z_ROUNDHZ_MAX FEEDRATE_ROUNDHZ_MAX

Definition at line 98 of file feeder_rate.c.

◆ Z_ROUNDHZ_MIN

#define Z_ROUNDHZ_MIN FEEDRATE_ROUNDHZ_MIN

Definition at line 97 of file feeder_rate.c.

◆ Z_SINC_ACCUMULATE

#define Z_SINC_ACCUMULATE ( ... )

Value:

        do {                                    \
        _Z_SINC_ACCUMULATE(__VA_ARGS__);                                \
} while (0)

Definition at line 542 of file feeder_rate.c.

◆ Z_SINC_ACCUMULATE_DECR

#define Z_SINC_ACCUMULATE_DECR 1

Definition at line 545 of file feeder_rate.c.

◆ Z_SINC_BASE_LEN

#define Z_SINC_BASE_LEN ( i ) ((z_coeff_tab[Z_SINC_COEFF_IDX(i)].len - 1) >> (Z_DRIFT_SHIFT - 1))

Definition at line 370 of file feeder_rate.c.

◆ Z_SINC_COEFF_IDX

#define Z_SINC_COEFF_IDX ( i ) ((i)->quality - Z_QUALITY_LINEAR - 1)

Definition at line 364 of file feeder_rate.c.

◆ Z_SINC_DOWNMAX

#define Z_SINC_DOWNMAX 48 /* 384000 / 8000 */

Definition at line 84 of file feeder_rate.c.

◆ Z_SINC_LEN

#define Z_SINC_LEN ( i )

Value:

((int32_t)(((uint64_t)z_coeff_tab[Z_SINC_COEFF_IDX(i)].len << \

Z_SHIFT) / (i)->z_dy))

Z_SINC_COEFF_IDX

#define Z_SINC_COEFF_IDX(i)

Definition: feeder_rate.c:364

Definition at line 366 of file feeder_rate.c.

◆ Z_SINC_MAX

#define Z_SINC_MAX 0x3fffff

Definition at line 83 of file feeder_rate.c.

◆ Z_USE_ALPHADRIFT

#define Z_USE_ALPHADRIFT 1

Definition at line 111 of file feeder_rate.c.

Typedef Documentation

◆ z_resampler_t

typedef void(* z_resampler_t) (struct z_info *, uint8_t *)

Definition at line 120 of file feeder_rate.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
Z_RESAMPLER_ZOH
Z_RESAMPLER_LINEAR
Z_RESAMPLER_SINC
Z_RESAMPLER_SINC_POLYPHASE
Z_RESAMPLER_LAST

Definition at line 654 of file feeder_rate.c.

Function Documentation

◆ FEEDER_DECLARE()

FEEDER_DECLARE	(	feeder_rate	,
		NULL
	)

◆ SND_DECLARE_FILE()

SND_DECLARE_FILE ( "$FreeBSD$" )

◆ sysctl_hw_snd_feeder_rate_max()

static int sysctl_hw_snd_feeder_rate_max ( SYSCTL_HANDLER_ARGS )

static

Definition at line 194 of file feeder_rate.c.

References feeder_rate_max, feeder_rate_min, req, val, and Z_FACTOR_SAFE.

◆ sysctl_hw_snd_feeder_rate_min()

static int sysctl_hw_snd_feeder_rate_min ( SYSCTL_HANDLER_ARGS )

static

Definition at line 171 of file feeder_rate.c.

References feeder_rate_max, feeder_rate_min, req, val, and Z_FACTOR_SAFE.

◆ sysctl_hw_snd_feeder_rate_quality()

static int sysctl_hw_snd_feeder_rate_quality ( SYSCTL_HANDLER_ARGS )

static

Definition at line 240 of file feeder_rate.c.

References c, chn_findfeeder(), CHN_FOREACH, CHN_LOCK, CHN_STARTED, CHN_UNLOCK, pcm_feeder::data, FEEDER_RATE, feeder_rate_quality, FEEDRATE_QUALITY, snddev_info::pcm, PCM_ACQUIRE, pcm_devclass, PCM_LOCK, PCM_REGISTERED, PCM_RELEASE, PCM_UNLOCK, PCM_WAIT, req, and val.

Here is the call graph for this function:

◆ sysctl_hw_snd_feeder_rate_round()

static int sysctl_hw_snd_feeder_rate_round ( SYSCTL_HANDLER_ARGS )

static

Definition at line 217 of file feeder_rate.c.

References feeder_rate_round, req, val, Z_ROUNDHZ, and Z_ROUNDHZ_MAX.

◆ SYSCTL_INT()

SYSCTL_INT	(	_hw_snd	,
		OID_AUTO	,
		feeder_rate_polyphase_max	,
		CTLFLAG_RWTUN	,
		&	feeder_rate_polyphase_max,
		0	,
		"maximum allowable polyphase entries"
	)

◆ SYSCTL_PROC() [1/4]

SYSCTL_PROC	(	_hw_snd	,
		OID_AUTO	,
		feeder_rate_max	,
		CTLTYPE_INT\|CTLFLAG_RWTUN\|	CTLFLAG_MPSAFE,
		0	,
		sizeof(int)	,
		sysctl_hw_snd_feeder_rate_max	,
		"I"	,
		"maximum allowable rate"
	)

◆ SYSCTL_PROC() [2/4]

SYSCTL_PROC	(	_hw_snd	,
		OID_AUTO	,
		feeder_rate_min	,
		CTLTYPE_INT\|CTLFLAG_RWTUN\|	CTLFLAG_MPSAFE,
		0	,
		sizeof(int)	,
		sysctl_hw_snd_feeder_rate_min	,
		"I"	,
		"minimum allowable rate"
	)

◆ SYSCTL_PROC() [3/4]

SYSCTL_PROC	(	_hw_snd	,
		OID_AUTO	,
		feeder_rate_quality	,
		CTLTYPE_INT\|CTLFLAG_RWTUN\|	CTLFLAG_NEEDGIANT,
		0	,
		sizeof(int)	,
		sysctl_hw_snd_feeder_rate_quality	,
		"I"	,
		"sample rate converter quality ("__XSTRING(Z_QUALITY_MIN)"=low .. " __XSTRING(Z_QUALITY_MAX)"=high)"
	)

◆ SYSCTL_PROC() [4/4]

SYSCTL_PROC	(	_hw_snd	,
		OID_AUTO	,
		feeder_rate_round	,
		CTLTYPE_INT\|CTLFLAG_RWTUN\|	CTLFLAG_MPSAFE,
		0	,
		sizeof(int)	,
		sysctl_hw_snd_feeder_rate_round	,
		"I"	,
		"sample rate converter rounding threshold"
	)

◆ SYSCTL_STRING()

SYSCTL_STRING	(	_hw_snd	,
		OID_AUTO	,
		feeder_rate_presets	,
		CTLFLAG_RD	,
		&	feeder_rate_presets,
		0	,
		"compile-time rate presets"
	)

◆ z_coeff_interpolate()

static int32_t z_coeff_interpolate	(	int32_t	z,
		int32_t *	z_coeff
	)

static

Definition at line 819 of file feeder_rate.c.

References Z_POLYPHASE_COEFF_SHIFT.

Referenced by z_resampler_build_polyphase().

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◆ z_feed_zoh()

static void z_feed_zoh	(	struct z_info *	info,
		uint8_t *	dst
	)

static

Definition at line 434 of file feeder_rate.c.

References z_info::bps, z_info::channels, src, z_copy, z_info::z_delay, and z_info::z_start.

◆ z_gcd()

static int32_t z_gcd	(	int32_t	x,
		int32_t	y
	)

static

Definition at line 400 of file feeder_rate.c.

Referenced by z_resampler_setup().

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◆ z_min()

static __inline uint32_t z_min	(	uint32_t	x,
		uint32_t	y
	)

static

Definition at line 393 of file feeder_rate.c.

Referenced by z_resampler_feed(), and z_resampler_feed_internal().

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◆ z_resampler_build_polyphase()

static int z_resampler_build_polyphase ( struct z_info * info )

static

Definition at line 1031 of file feeder_rate.c.

References c, feeder_rate_polyphase_max, free, z_info::z_coeff, z_coeff_interpolate(), z_info::z_dx, z_info::z_dy, z_info::z_gx, z_info::z_gy, z_info::z_pcoeff, and z_info::z_size.

Referenced by z_resampler_setup().

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◆ z_resampler_feed()

static int z_resampler_feed	(	struct pcm_feeder *	f,
		struct pcm_channel *	c,
		uint8_t *	b,
		uint32_t	count,
		void *	source
	)

static

Definition at line 1706 of file feeder_rate.c.

References b, c, count, pcm_feeder::data, feed, left, source, z_info::z_maxfeed, z_min(), and z_resampler_feed_internal().

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◆ z_resampler_feed_internal()

static uint32_t z_resampler_feed_internal	(	struct pcm_feeder *	f,
		struct pcm_channel *	c,
		uint8_t *	b,
		uint32_t	count,
		void *	source
	)

static

Definition at line 1570 of file feeder_rate.c.

References _Z_GY2GX, b, z_info::bps, c, z_info::channels, count, pcm_feeder::data, z_info::dst, pcm_feeder::source, source, start, z_info::z_alpha, z_info::z_alphadrift, z_copy, z_info::z_delay, z_drift, z_feed, z_fetched, z_free, z_gx2gy, z_info::z_gy, z_gy2gx, z_min(), z_next, z_info::z_pos, z_prev, z_info::z_resample, z_info::z_size, z_info::z_start, and z_info::z_startdrift.

Referenced by z_resampler_feed().

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◆ z_resampler_free()

static int z_resampler_free ( struct pcm_feeder * f )

static

Definition at line 1551 of file feeder_rate.c.

References pcm_feeder::data, free, z_info::z_delay, and z_info::z_pcoeff.

◆ z_resampler_get()

static int z_resampler_get	(	struct pcm_feeder *	f,
		int	what
	)

static

Definition at line 1491 of file feeder_rate.c.

References z_info::channels, pcm_feeder::data, z_info::quality, z_info::rdst, z_info::rsrc, what, Z_RATE_CHANNELS, Z_RATE_DST, Z_RATE_QUALITY, and Z_RATE_SRC.

◆ z_resampler_init()

static int z_resampler_init ( struct pcm_feeder * f )

static

Definition at line 1518 of file feeder_rate.c.

References AFMT_CHANNEL, z_info::channels, pcm_feeder::data, pcm_feeder::desc, feeder_rate_quality, free, pcm_feederdesc::in, pcm_feederdesc::out, z_info::quality, z_info::rdst, z_info::rsrc, z_info::z_delay, z_info::z_pcoeff, Z_RATE_DEFAULT, and z_resampler_setup().

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◆ z_resampler_reset()

static void z_resampler_reset ( struct z_info * info )

static

Definition at line 707 of file feeder_rate.c.

References z_info::dst, feeder_rate_round, free, z_info::quality, z_info::rdst, z_info::rsrc, z_info::src, z_info::z_alpha, z_info::z_coeff, z_info::z_dcoeff, z_info::z_dx, z_info::z_dy, z_info::z_gx, z_info::z_gy, z_info::z_pcoeff, z_info::z_resample, z_info::z_scale, and z_info::z_size.

Referenced by z_resampler_setup().

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◆ z_resampler_set()

static int z_resampler_set	(	struct pcm_feeder *	f,
		int	what,
		int32_t	value
	)

static

Definition at line 1436 of file feeder_rate.c.

References z_info::channels, pcm_feeder::data, feeder_rate_max, z_info::quality, z_info::rdst, z_info::rsrc, SND_CHN_MAX, value, what, Z_RATE_CHANNELS, Z_RATE_DST, Z_RATE_QUALITY, Z_RATE_SRC, and z_resampler_setup().

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◆ z_resampler_setup()

static int z_resampler_setup ( struct pcm_feeder * f )

static

Definition at line 1093 of file feeder_rate.c.

References _Z_GCAST, AFMT_BPS, AFMT_ENCODING, alloc, z_info::bps, z_info::channels, pcm_feeder::data, pcm_feeder::desc, z_info::dst, format, free, pcm_feederdesc::in, pcm_feederdesc::out, z_info::quality, z_info::rdst, z_info::rsrc, size, sndbuf_zerodata(), z_info::src, start, z_info::z_alloc, z_info::z_alphadrift, z_info::z_coeff, z_info::z_dcoeff, z_info::z_delay, z_drift, z_info::z_dx, z_info::z_dy, Z_FACTOR_SAFE, z_info::z_full, z_gcd(), z_info::z_gx, z_gx2gy, z_info::z_gy, z_gy2gx, Z_IS_LINEAR, Z_IS_SINC, z_info::z_mask, z_info::z_maxfeed, z_next, z_info::z_pcoeff, z_info::z_pos, z_prev, z_info::z_resample, z_resampler_build_polyphase(), Z_RESAMPLER_IDX, z_resampler_reset(), z_resampler_sinc_len(), Z_RESAMPLER_SINC_POLYPHASE, z_resampler_tab, Z_RESAMPLER_TAB_SIZE, Z_RESERVOIR, Z_RESERVOIR_MAX, z_roundpow2(), z_info::z_scale, Z_SINC_BASE_LEN, Z_SINC_COEFF_IDX, Z_SINC_DOWNMAX, Z_SINC_MAX, z_info::z_size, z_info::z_start, and z_info::z_startdrift.

Referenced by z_resampler_init(), and z_resampler_set().

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◆ z_resampler_sinc_len()

static int32_t z_resampler_sinc_len ( struct z_info * info )

static

Definition at line 739 of file feeder_rate.c.

References c, len, z_info::z_dy, Z_IS_SINC, Z_SINC_COEFF_IDX, and Z_SINC_LEN.

Referenced by z_resampler_setup().

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◆ z_roundpow2()

static int32_t z_roundpow2 ( int32_t v )

static

Definition at line 414 of file feeder_rate.c.

Referenced by z_resampler_setup().

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Variable Documentation

◆ feeder_rate_desc

struct pcm_feederdesc feeder_rate_desc[]

static

Initial value:

= {
        { FEEDER_RATE, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
}

Definition at line 1727 of file feeder_rate.c.

◆ feeder_rate_max

int feeder_rate_max = Z_RATE_MAX

Definition at line 157 of file feeder_rate.c.

Referenced by SLIST_HEAD(), sysctl_dev_pcm_vchanrate(), sysctl_hw_snd_feeder_rate_max(), sysctl_hw_snd_feeder_rate_min(), vchan_create(), and z_resampler_set().

◆ feeder_rate_methods

kobj_method_t feeder_rate_methods[]

static

Initial value:

= {
        KOBJMETHOD(feeder_init,         z_resampler_init),
        KOBJMETHOD(feeder_free,         z_resampler_free),
        KOBJMETHOD(feeder_set,          z_resampler_set),
        KOBJMETHOD(feeder_get,          z_resampler_get),
        KOBJMETHOD(feeder_feed,         z_resampler_feed),
        KOBJMETHOD_END
}

Definition at line 1732 of file feeder_rate.c.

◆ feeder_rate_min

int feeder_rate_min = Z_RATE_MIN

Definition at line 156 of file feeder_rate.c.

Referenced by SLIST_HEAD(), sysctl_dev_pcm_vchanrate(), sysctl_hw_snd_feeder_rate_max(), sysctl_hw_snd_feeder_rate_min(), and vchan_create().

◆ feeder_rate_polyphase_max

int feeder_rate_polyphase_max = Z_POLYPHASE_MAX

static

Definition at line 161 of file feeder_rate.c.

Referenced by z_resampler_build_polyphase().

◆ feeder_rate_presets

char feeder_rate_presets[] = FEEDER_RATE_PRESETS

static

Definition at line 164 of file feeder_rate.c.

◆ feeder_rate_quality

int feeder_rate_quality = Z_QUALITY_DEFAULT

Definition at line 159 of file feeder_rate.c.

Referenced by sysctl_hw_snd_feeder_rate_quality(), and z_resampler_init().

◆ feeder_rate_round

int feeder_rate_round = Z_ROUNDHZ

Definition at line 158 of file feeder_rate.c.

Referenced by chn_setparam(), SLIST_HEAD(), sysctl_dev_pcm_vchanrate(), sysctl_hw_snd_feeder_rate_round(), vchan_create(), and z_resampler_reset().

◆ format

uint32_t format

Definition at line 678 of file feeder_rate.c.

Referenced by z_resampler_setup().

◆ resampler

z_resampler_t resampler[Z_RESAMPLER_LAST]

Definition at line 679 of file feeder_rate.c.

◆

const struct { ... } z_resampler_tab[]

Initial value:

= {
 
        Z_RESAMPLER_ENTRY(S, 16, LE),
        Z_RESAMPLER_ENTRY(S, 32, LE),
 
        Z_RESAMPLER_ENTRY(S, 16, BE),
        Z_RESAMPLER_ENTRY(S, 32, BE),
 
}

Referenced by z_resampler_setup().

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

◆ _Z_DRIFT

◆ _Z_GCAST

◆ _Z_GX2GY

◆ _Z_GY2GX

◆ _Z_SINC_ACCUMULATE

◆ SND_USE_FXDIV

◆ z_align

◆ Z_CLAMP

◆ Z_CLIP_CHECK

◆ z_copy

◆ Z_DECLARE

◆ Z_DECLARE_LINEAR

◆ Z_DECLARE_SINC

◆ Z_DECLARE_SINC_POLYPHASE

◆ Z_DIV

◆ z_drift

◆ Z_FACTOR_MAX

◆ Z_FACTOR_MIN

◆ Z_FACTOR_SAFE

◆ z_feed

◆ z_fetched

◆ z_free

◆ z_gx2gy

◆ z_gy2gx

◆ Z_IS_LINEAR

◆ Z_IS_SINC

◆ Z_IS_ZOH

◆ Z_MULTIFORMAT

◆ z_next

◆ Z_PARANOID

◆ Z_POLYPHASE_COEFF_SHIFT

◆ Z_POLYPHASE_MAX

◆ z_prev

◆ Z_QUALITY_DEFAULT

◆ Z_RATE_CHANNELS

◆ Z_RATE_DEFAULT

◆ Z_RATE_DST

◆ Z_RATE_MAX

◆ Z_RATE_MIN

◆ Z_RATE_QUALITY

◆ Z_RATE_SRC

◆ Z_RESAMPLER_ENTRY

◆ Z_RESAMPLER_IDX

◆ Z_RESAMPLER_TAB_SIZE

◆ Z_RESERVOIR

◆ Z_RESERVOIR_MAX

◆ Z_ROUNDHZ

◆ Z_ROUNDHZ_MAX

◆ Z_ROUNDHZ_MIN

◆ Z_SINC_ACCUMULATE

◆ Z_SINC_ACCUMULATE_DECR

◆ Z_SINC_BASE_LEN

◆ Z_SINC_COEFF_IDX

◆ Z_SINC_DOWNMAX

◆ Z_SINC_LEN

◆ Z_SINC_MAX

◆ Z_USE_ALPHADRIFT

Typedef Documentation

◆ z_resampler_t

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ FEEDER_DECLARE()

◆ SND_DECLARE_FILE()

◆ sysctl_hw_snd_feeder_rate_max()

◆ sysctl_hw_snd_feeder_rate_min()

◆ sysctl_hw_snd_feeder_rate_quality()

◆ sysctl_hw_snd_feeder_rate_round()

◆ SYSCTL_INT()

◆ SYSCTL_PROC() [1/4]

◆ SYSCTL_PROC() [2/4]

◆ SYSCTL_PROC() [3/4]

◆ SYSCTL_PROC() [4/4]