dsd.c File Reference

#include <string.h>
#include "libavutil/attributes.h"
#include "libavutil/reverse.h"
#include "libavutil/thread.h"
#include "dsd.h"

Go to the source code of this file.

Macros
#define	CTABLES   ((HTAPS + 7) / 8) /** number of "8 MACs" lookup tables */

Functions
static av_cold void	dsd_ctables_tableinit (void)
av_cold void	ff_init_dsd_data (void)
void	ff_dsd2pcm_translate (DSDContext *s, size_t samples, int lsbf, const uint8_t *src, ptrdiff_t src_stride, float *dst, ptrdiff_t dst_stride)

Variables
static const double	htaps [HTAPS]
	The 2nd half (48 coeffs) of a 96-tap symmetric lowpass filter. More...
static double	ctables_lsbf [CTABLES][256]
static double	ctables_msbf [CTABLES][256]

Macro Definition Documentation

CTABLES

#define CTABLES   ((HTAPS + 7) / 8) /** number of "8 MACs" lookup tables */

Definition at line 30 of file dsd.c.

Function Documentation

dsd_ctables_tableinit()

static av_cold void dsd_ctables_tableinit ( void  )

static

Definition at line 74 of file dsd.c.

Referenced by ff_init_dsd_data().

ff_init_dsd_data()

av_cold void ff_init_dsd_data

(

void

)

Definition at line 92 of file dsd.c.

Referenced by decode_init(), and wv_dsd_reset().

ff_dsd2pcm_translate()

void ff_dsd2pcm_translate	(	DSDContext *	s,
		size_t	samples,
		int	lsbf,
		const uint8_t *	src,
		ptrdiff_t	src_stride,
		float *	dst,
		ptrdiff_t	dst_stride
	)

Definition at line 98 of file dsd.c.

Referenced by decode_frame(), and dsd_channel().

Variable Documentation

htaps

const double htaps[HTAPS]

static

Initial value:

= {
     0.09950731974056658,    0.09562845727714668,    0.08819647126516944,
     0.07782552527068175,    0.06534876523171299,    0.05172629311427257,
     0.0379429484910187,     0.02490921351762261,    0.0133774746265897,
     0.003883043418804416,  -0.003284703416210726,  -0.008080250212687497,
    -0.01067241812471033,   -0.01139427235000863,   -0.0106813877974587,
    -0.009007905078766049,  -0.006828859761015335,  -0.004535184322001496,
    -0.002425035959059578,  -0.0006922187080790708,  0.0005700762133516592,
     0.001353838005269448,   0.001713709169690937,   0.001742046839472948,
     0.001545601648013235,   0.001226696225277855,   0.0008704322683580222,
     0.0005381636200535649,  0.000266446345425276,   7.002968738383528e-05,
    -5.279407053811266e-05, -0.0001140625650874684, -0.0001304796361231895,
    -0.0001189970287491285, -9.396247155265073e-05, -6.577634378272832e-05,
    -4.07492895872535e-05,  -2.17407957554587e-05,  -9.163058931391722e-06,
    -2.017460145032201e-06,  1.249721855219005e-06,  2.166655190537392e-06,
     1.930520892991082e-06,  1.319400334374195e-06,  7.410039764949091e-07,
     3.423230509967409e-07,  1.244182214744588e-07,  3.130441005359396e-08
}

The 2nd half (48 coeffs) of a 96-tap symmetric lowpass filter.

Definition at line 52 of file dsd.c.

Referenced by decode_header(), dsd_ctables_tableinit(), and if().

ctables_lsbf

double ctables_lsbf[CTABLES][256]

static

Definition at line 71 of file dsd.c.

Referenced by dsd_ctables_tableinit(), and ff_dsd2pcm_translate().

ctables_msbf

double ctables_msbf[CTABLES][256]

static

Definition at line 72 of file dsd.c.

Referenced by dsd_ctables_tableinit(), and ff_dsd2pcm_translate().