DitherContext Struct Reference

#include <swresample_internal.h>

Data Fields
DitherDSPContext	ddsp
enum AVResampleDitherMethod	method
int	apply_map
ChannelMapInfo *	ch_map_info
int	mute_dither_threshold
int	mute_reset_threshold
const float *	ns_coef_b
const float *	ns_coef_a
int	channels
DitherState *	state
AudioData *	flt_data
AudioData *	s16_data
AudioConvert *	ac_in
AudioConvert *	ac_out
void(*	quantize )(int16_t *dst, const float *src, float *dither, int len)
int	samples_align
enum SwrDitherType	method
int	noise_pos
float	scale
float	noise_scale
	Noise scale.
int	ns_taps
	Noise shaping dither taps.
float	ns_scale
	Noise shaping dither scale.
float	ns_scale_1
	Noise shaping dither scale^-1.
int	ns_pos
	Noise shaping dither position.
float	ns_coeffs [NS_TAPS]
	Noise shaping filter coefficients.
float	ns_errors [SWR_CH_MAX][2 *NS_TAPS]
AudioData	noise
	noise used for dithering
AudioData	temp
	temporary storage when writing into the input buffer isnt possible
int	output_sample_bits
	the number of used output bits, needed to scale dither correctly

Detailed Description

Definition at line 54 of file dither.c.

Field Documentation

DitherDSPContext DitherContext::ddsp

Definition at line 55 of file dither.c.

Referenced by ff_convert_dither(), ff_dither_alloc(), and generate_dither_noise().

enum AVResampleDitherMethod DitherContext::method

Definition at line 56 of file dither.c.

Referenced by convert_samples(), ff_convert_dither(), ff_dither_alloc(), generate_dither_noise(), swr_convert_internal(), swr_init(), swri_dither_init(), and swri_get_dither().

int DitherContext::apply_map

Definition at line 57 of file dither.c.

Referenced by ff_convert_dither(), and ff_dither_alloc().

ChannelMapInfo* DitherContext::ch_map_info

Definition at line 58 of file dither.c.

Referenced by ff_convert_dither(), and ff_dither_alloc().

int DitherContext::mute_dither_threshold

Definition at line 60 of file dither.c.

Referenced by ff_dither_alloc(), and quantize_triangular_ns().

int DitherContext::mute_reset_threshold

Definition at line 61 of file dither.c.

Referenced by ff_dither_alloc(), and quantize_triangular_ns().

const float* DitherContext::ns_coef_b

Definition at line 62 of file dither.c.

Referenced by ff_dither_alloc(), and quantize_triangular_ns().

const float* DitherContext::ns_coef_a

Definition at line 63 of file dither.c.

Referenced by ff_dither_alloc(), and quantize_triangular_ns().

int DitherContext::channels

Definition at line 65 of file dither.c.

Referenced by ff_dither_alloc(), and ff_dither_free().

DitherState* DitherContext::state

Definition at line 66 of file dither.c.

Referenced by convert_samples(), ff_dither_alloc(), and ff_dither_free().

AudioData* DitherContext::flt_data

Definition at line 68 of file dither.c.

Referenced by ff_convert_dither(), ff_dither_alloc(), and ff_dither_free().

AudioData* DitherContext::s16_data

Definition at line 69 of file dither.c.

Referenced by ff_convert_dither(), ff_dither_alloc(), and ff_dither_free().

AudioConvert* DitherContext::ac_in

Definition at line 70 of file dither.c.

Referenced by ff_convert_dither(), ff_dither_alloc(), and ff_dither_free().

AudioConvert* DitherContext::ac_out

Definition at line 71 of file dither.c.

Referenced by ff_convert_dither(), ff_dither_alloc(), and ff_dither_free().

void(* DitherContext::quantize)(int16_t *dst, const float *src, float *dither, int len)

Definition at line 73 of file dither.c.

Referenced by convert_samples(), and ff_convert_dither().

int DitherContext::samples_align

Definition at line 74 of file dither.c.

Referenced by convert_samples(), and ff_convert_dither().

enum SwrDitherType DitherContext::method

Definition at line 54 of file swresample_internal.h.

int DitherContext::noise_pos

Definition at line 55 of file swresample_internal.h.

Referenced by swr_convert_internal().

float DitherContext::scale

Definition at line 56 of file swresample_internal.h.

Referenced by swri_dither_init().

float DitherContext::noise_scale

Noise scale.

Definition at line 57 of file swresample_internal.h.

Referenced by swri_dither_init(), and swri_get_dither().

int DitherContext::ns_taps

Noise shaping dither taps.

Definition at line 58 of file swresample_internal.h.

Referenced by swri_dither_init().

float DitherContext::ns_scale

Noise shaping dither scale.

Definition at line 59 of file swresample_internal.h.

Referenced by swri_dither_init().

float DitherContext::ns_scale_1

Noise shaping dither scale^-1.

Definition at line 60 of file swresample_internal.h.

Referenced by swri_dither_init().

int DitherContext::ns_pos

Noise shaping dither position.

Definition at line 61 of file swresample_internal.h.

Referenced by swri_dither_init().

float DitherContext::ns_coeffs[NS_TAPS]

Noise shaping filter coefficients.

Definition at line 62 of file swresample_internal.h.

Referenced by swri_dither_init().

float DitherContext::ns_errors[SWR_CH_MAX][2 *NS_TAPS]

Definition at line 63 of file swresample_internal.h.

Referenced by swri_dither_init().

AudioData DitherContext::noise

noise used for dithering

Definition at line 64 of file swresample_internal.h.

Referenced by swr_convert_internal(), swr_free(), swr_init(), and swri_dither_init().

AudioData DitherContext::temp

temporary storage when writing into the input buffer isnt possible

Definition at line 65 of file swresample_internal.h.

Referenced by swr_convert_internal(), swr_free(), swr_init(), and swri_dither_init().

int DitherContext::output_sample_bits

the number of used output bits, needed to scale dither correctly

Definition at line 66 of file swresample_internal.h.

Referenced by swr_convert_internal(), and swri_dither_init().

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The documentation for this struct was generated from the following files:

• libavresample/dither.c
• libswresample/swresample_internal.h