aacenc_utils.h File Reference

AAC encoder utilities. More...

#include "aac.h"
#include "aac_tablegen_decl.h"
#include "aacenctab.h"

Go to the source code of this file.

Macros
#define	ROUND_STANDARD   0.4054f
#define	ROUND_TO_ZERO   0.1054f
#define	C_QUANT   0.4054f
#define	ERROR_IF(cond,...)
#define	WARN_IF(cond,...)

Functions
static void	abs_pow34_v (float *out, const float *in, const int size)
static int	quant (float coef, const float Q, const float rounding)
	Quantize one coefficient. More...
static void	quantize_bands (int *out, const float *in, const float *scaled, int size, float Q34, int is_signed, int maxval, const float rounding)
static float	find_max_val (int group_len, int swb_size, const float *scaled)
static int	find_min_book (float maxval, int sf)
static uint8_t	coef2minsf (float coef)
	Return the minimum scalefactor where the quantized coef does not clip. More...
static uint8_t	coef2maxsf (float coef)
	Return the maximum scalefactor where the quantized coef is not zero. More...
static int	quant_array_idx (const float val, const float *arr, const int num)

Detailed Description

AAC encoder utilities.

Author

Rostislav Pehlivanov ( atomnuker gmail com )

Definition in file aacenc_utils.h.

Macro Definition Documentation

#define ROUND_STANDARD   0.4054f

Definition at line 35 of file aacenc_utils.h.

Referenced by search_for_quantizers_faac().

#define ROUND_TO_ZERO   0.1054f

Definition at line 36 of file aacenc_utils.h.

#define C_QUANT   0.4054f

Definition at line 37 of file aacenc_utils.h.

Referenced by find_min_book().

#define ERROR_IF	(		cond,
			...
	)

Value:

if (cond) { \
        av_log(avctx, AV_LOG_ERROR, __VA_ARGS__); \
        return AVERROR(EINVAL); \
    }

Definition at line 131 of file aacenc_utils.h.

Referenced by aac_encode_init().

#define WARN_IF	(		cond,
			...
	)

Value:

if (cond) { \
        av_log(avctx, AV_LOG_WARNING, __VA_ARGS__); \
    }

Definition at line 137 of file aacenc_utils.h.

Referenced by aac_encode_init().

Function Documentation

static void abs_pow34_v ( float *  out, const float *  in, const int  size  )

inlinestatic

Definition at line 39 of file aacenc_utils.h.

Referenced by codebook_trellis_rate(), encode_window_bands_info(), ff_aac_is_encoding_err(), ff_aac_search_for_pred(), quantize_and_encode_band_cost_template(), search_for_ms(), search_for_quantizers_anmr(), search_for_quantizers_faac(), and search_for_quantizers_twoloop().

static int quant ( float  coef, const float  Q, const float  rounding  )

inlinestatic

Quantize one coefficient.

Returns

absolute value of the quantized coefficient

See Also

3GPP TS26.403 5.6.2 "Scalefactor determination"

Definition at line 53 of file aacenc_utils.h.

static void quantize_bands ( int *  out, const float *  in, const float *  scaled, int  size, float  Q34, int  is_signed, int  maxval, const float  rounding  )

inlinestatic

Definition at line 59 of file aacenc_utils.h.

Referenced by quantize_and_encode_band_cost_template().

static float find_max_val ( int  group_len, int  swb_size, const float *  scaled  )

inlinestatic

Definition at line 74 of file aacenc_utils.h.

Referenced by ff_aac_is_encoding_err(), ff_aac_search_for_pred(), search_for_quantizers_anmr(), and search_for_quantizers_twoloop().

static int find_min_book ( float  maxval, int  sf  )

inlinestatic

Definition at line 86 of file aacenc_utils.h.

Referenced by ff_aac_is_encoding_err(), ff_aac_search_for_pred(), search_for_quantizers_anmr(), and search_for_quantizers_twoloop().

static uint8_t coef2minsf ( float  coef )

inlinestatic

Return the minimum scalefactor where the quantized coef does not clip.

Definition at line 103 of file aacenc_utils.h.

Referenced by search_for_quantizers_anmr().

static uint8_t coef2maxsf ( float  coef )

inlinestatic

Return the maximum scalefactor where the quantized coef is not zero.

Definition at line 109 of file aacenc_utils.h.

Referenced by search_for_quantizers_anmr().

static int quant_array_idx ( const float  val, const float *  arr, const int  num  )

inlinestatic

Definition at line 117 of file aacenc_utils.h.