#include "aacdec_usac.h"
#include "aacdec_tab.h"
#include "aacdec_lpd.h"
#include "aacdec_ac.h"
#include "libavcodec/aacsbr.h"
#include "libavcodec/aactab.h"
#include "libavutil/mem.h"
#include "libavcodec/mpeg4audio.h"
#include "libavcodec/unary.h"

Macros
#define	SFB_PER_PRED_BAND 2

Functions
static uint32_t	get_escaped_value (GetBitContext *gb, int nb1, int nb2, int nb3)

static int	decode_loudness_info (AACDecContext ac, AACUSACLoudnessInfo info, GetBitContext *gb)

static int	decode_loudness_set (AACDecContext ac, AACUSACConfig usac, GetBitContext *gb)

static int	decode_usac_sbr_data (AACDecContext ac, AACUsacElemConfig e, GetBitContext *gb)

static void	decode_usac_element_core (AACUsacElemConfig e, GetBitContext gb, int sbr_ratio)

static int	decode_usac_element_pair (AACDecContext ac, AACUsacElemConfig e, GetBitContext *gb)

static int	decode_usac_extension (AACDecContext ac, AACUsacElemConfig e, GetBitContext *gb)

int	ff_aac_usac_reset_state (AACDecContext ac, OutputConfiguration oc)

int	ff_aac_usac_config_decode (AACDecContext ac, AVCodecContext avctx, GetBitContext gb, OutputConfiguration oc, int channel_config)

static int	decode_usac_scale_factors (AACDecContext ac, SingleChannelElement sce, GetBitContext *gb, uint8_t global_gain)

static int	decode_spectrum_ac (AACDecContext s, float coef[1024], GetBitContext gb, AACArithState *state, int reset, uint16_t len, uint16_t N)
	Decode and dequantize arithmetically coded, uniformly quantized value. More...

static int	decode_usac_stereo_cplx (AACDecContext ac, AACUsacStereo us, ChannelElement cpe, GetBitContext gb, int num_window_groups, int prev_num_window_groups, int indep_flag)

static int	setup_sce (AACDecContext ac, SingleChannelElement sce, AACUSACConfig *usac)

static int	decode_usac_stereo_info (AACDecContext ac, AACUSACConfig usac, AACUsacElemConfig ec, ChannelElement cpe, GetBitContext *gb, int indep_flag)

static float	noise_random_sign (unsigned int *seed)

static void	apply_noise_fill (AACDecContext ac, SingleChannelElement sce, AACUsacElemData *ue)

static void	spectrum_scale (AACDecContext ac, SingleChannelElement sce, AACUsacElemData *ue)

static void	complex_stereo_downmix_prev (AACDecContext ac, ChannelElement cpe, float *dmix_re)

static void	complex_stereo_downmix_cur (AACDecContext ac, ChannelElement cpe, float *dmix_re)

static void	complex_stereo_interpolate_imag (float im, float re, const float f[7], int len, int factor_even, int factor_odd)

static void	apply_complex_stereo (AACDecContext ac, ChannelElement cpe)

static const float *	complex_stereo_get_filter (ChannelElement *cpe, int is_prev)

static void	spectrum_decode (AACDecContext ac, AACUSACConfig usac, ChannelElement *cpe, int nb_channels)

static int	decode_usac_core_coder (AACDecContext ac, AACUSACConfig usac, AACUsacElemConfig ec, ChannelElement che, GetBitContext *gb, int indep_flag, int nb_channels)

static int	parse_audio_preroll (AACDecContext ac, GetBitContext gb)

static int	parse_ext_ele (AACDecContext ac, AACUsacElemConfig e, GetBitContext *gb)

int	ff_aac_usac_decode_frame (AVCodecContext avctx, AACDecContext ac, GetBitContext gb, int got_frame_ptr)

Variables
static enum AVChannel	usac_ch_pos_to_av [64]

Macro Definition Documentation

◆ SFB_PER_PRED_BAND

#define SFB_PER_PRED_BAND 2

Definition at line 34 of file aacdec_usac.c.

Function Documentation

◆ get_escaped_value()

static uint32_t get_escaped_value	(	GetBitContext *	gb,
		int	nb1,
		int	nb2,
		int	nb3
	)

inlinestatic

Definition at line 36 of file aacdec_usac.c.

Referenced by decode_usac_extension(), ff_aac_usac_config_decode(), and parse_audio_preroll().

◆ decode_loudness_info()

static int decode_loudness_info	(	AACDecContext *	ac,
		AACUSACLoudnessInfo *	info,
		GetBitContext *	gb
	)

static

Definition at line 85 of file aacdec_usac.c.

Referenced by decode_loudness_set().

◆ decode_loudness_set()

static int decode_loudness_set	(	AACDecContext *	ac,
		AACUSACConfig *	usac,
		GetBitContext *	gb
	)

static

Definition at line 111 of file aacdec_usac.c.

Referenced by ff_aac_usac_config_decode().

◆ decode_usac_sbr_data()

static int decode_usac_sbr_data	(	AACDecContext *	ac,
		AACUsacElemConfig *	e,
		GetBitContext *	gb
	)

static

Definition at line 150 of file aacdec_usac.c.

Referenced by decode_usac_element_pair(), and ff_aac_usac_config_decode().

◆ decode_usac_element_core()

static void decode_usac_element_core	(	AACUsacElemConfig *	e,
		GetBitContext *	gb,
		int	sbr_ratio
	)

static

Definition at line 193 of file aacdec_usac.c.

Referenced by ff_aac_usac_config_decode().

◆ decode_usac_element_pair()

static int decode_usac_element_pair	(	AACDecContext *	ac,
		AACUsacElemConfig *	e,
		GetBitContext *	gb
	)

static

Definition at line 202 of file aacdec_usac.c.

Referenced by ff_aac_usac_config_decode().

◆ decode_usac_extension()

static int decode_usac_extension	(	AACDecContext *	ac,
		AACUsacElemConfig *	e,
		GetBitContext *	gb
	)

static

Definition at line 236 of file aacdec_usac.c.

Referenced by ff_aac_usac_config_decode().

◆ ff_aac_usac_reset_state()

int ff_aac_usac_reset_state	(	AACDecContext *	ac,
		OutputConfiguration *	oc
	)

Definition at line 274 of file aacdec_usac.c.

Referenced by ff_aac_usac_config_decode(), and flush().

◆ ff_aac_usac_config_decode()

int ff_aac_usac_config_decode	(	AACDecContext *	ac,
		AVCodecContext *	avctx,
		GetBitContext *	gb,
		OutputConfiguration *	oc,
		int	channel_config
	)

Definition at line 333 of file aacdec_usac.c.

Referenced by decode_audio_specific_config_gb(), and parse_audio_preroll().

◆ decode_usac_scale_factors()

static int decode_usac_scale_factors	(	AACDecContext *	ac,
		SingleChannelElement *	sce,
		GetBitContext *	gb,
		uint8_t	global_gain
	)

static

Definition at line 559 of file aacdec_usac.c.

Referenced by decode_usac_core_coder().

◆ decode_spectrum_ac()

static int decode_spectrum_ac	(	AACDecContext *	s,
		float	coef[1024],
		GetBitContext *	gb,
		AACArithState *	state,
		int	reset,
		uint16_t	len,
		uint16_t	N
	)

static

Decode and dequantize arithmetically coded, uniformly quantized value.

Parameters

coef	array of dequantized, scaled spectral data
sf	array of scalefactors or intensity stereo positions

Returns: Returns error status. 0 - OK, !0 - error

Definition at line 599 of file aacdec_usac.c.

Referenced by decode_usac_core_coder().

◆ decode_usac_stereo_cplx()

static int decode_usac_stereo_cplx	(	AACDecContext *	ac,
		AACUsacStereo *	us,
		ChannelElement *	cpe,
		GetBitContext *	gb,
		int	num_window_groups,
		int	prev_num_window_groups,
		int	indep_flag
	)

static

Definition at line 694 of file aacdec_usac.c.

Referenced by decode_usac_stereo_info().

◆ setup_sce()

static int setup_sce	(	AACDecContext *	ac,
		SingleChannelElement *	sce,
		AACUSACConfig *	usac
	)

static

Definition at line 785 of file aacdec_usac.c.

Referenced by decode_usac_core_coder(), and decode_usac_stereo_info().

◆ decode_usac_stereo_info()

static int decode_usac_stereo_info	(	AACDecContext *	ac,
		AACUSACConfig *	usac,
		AACUsacElemConfig *	ec,
		ChannelElement *	cpe,
		GetBitContext *	gb,
		int	indep_flag
	)

static

Definition at line 848 of file aacdec_usac.c.

Referenced by decode_usac_core_coder().

◆ noise_random_sign()

static float noise_random_sign ( unsigned int * seed )

inlinestatic

Definition at line 988 of file aacdec_usac.c.

Referenced by apply_noise_fill().

◆ apply_noise_fill()

static void apply_noise_fill	(	AACDecContext *	ac,
		SingleChannelElement *	sce,
		AACUsacElemData *	ue
	)

static

Definition at line 996 of file aacdec_usac.c.

Referenced by spectrum_scale().

◆ spectrum_scale()

static void spectrum_scale	(	AACDecContext *	ac,
		SingleChannelElement *	sce,
		AACUsacElemData *	ue
	)

static

Definition at line 1037 of file aacdec_usac.c.

Referenced by spectrum_decode().

◆ complex_stereo_downmix_prev()

static void complex_stereo_downmix_prev	(	AACDecContext *	ac,
		ChannelElement *	cpe,
		float *	dmix_re
	)

static

Definition at line 1067 of file aacdec_usac.c.

Referenced by spectrum_decode().

◆ complex_stereo_downmix_cur()

static void complex_stereo_downmix_cur	(	AACDecContext *	ac,
		ChannelElement *	cpe,
		float *	dmix_re
	)

static

Definition at line 1098 of file aacdec_usac.c.

Referenced by spectrum_decode().

◆ complex_stereo_interpolate_imag()

static void complex_stereo_interpolate_imag	(	float *	im,
		float *	re,
		const float	f[7],
		int	len,
		int	factor_even,
		int	factor_odd
	)

static

Definition at line 1138 of file aacdec_usac.c.

Referenced by spectrum_decode().

◆ apply_complex_stereo()

static void apply_complex_stereo	(	AACDecContext *	ac,
		ChannelElement *	cpe
	)

static

Definition at line 1192 of file aacdec_usac.c.

Referenced by spectrum_decode().

◆ complex_stereo_get_filter()

static const float* complex_stereo_get_filter	(	ChannelElement *	cpe,
		int	is_prev
	)

static

Definition at line 1244 of file aacdec_usac.c.

Referenced by spectrum_decode().

◆ spectrum_decode()

static void spectrum_decode	(	AACDecContext *	ac,
		AACUSACConfig *	usac,
		ChannelElement *	cpe,
		int	nb_channels
	)

static

Definition at line 1284 of file aacdec_usac.c.

Referenced by decode_usac_core_coder().

◆ decode_usac_core_coder()

static int decode_usac_core_coder	(	AACDecContext *	ac,
		AACUSACConfig *	usac,
		AACUsacElemConfig *	ec,
		ChannelElement *	che,
		GetBitContext *	gb,
		int	indep_flag,
		int	nb_channels
	)

static

Definition at line 1348 of file aacdec_usac.c.

Referenced by ff_aac_usac_decode_frame().

◆ parse_audio_preroll()

static int parse_audio_preroll	(	AACDecContext *	ac,
		GetBitContext *	gb
	)

static

Definition at line 1503 of file aacdec_usac.c.

Referenced by parse_ext_ele().

◆ parse_ext_ele()

static int parse_ext_ele	(	AACDecContext *	ac,
		AACUsacElemConfig *	e,
		GetBitContext *	gb
	)

static

Definition at line 1577 of file aacdec_usac.c.

Referenced by ff_aac_usac_decode_frame().

◆ ff_aac_usac_decode_frame()

int ff_aac_usac_decode_frame	(	AVCodecContext *	avctx,
		AACDecContext *	ac,
		GetBitContext *	gb,
		int *	got_frame_ptr
	)

Definition at line 1658 of file aacdec_usac.c.

Referenced by aac_decode_frame_int(), and parse_audio_preroll().

Variable Documentation

◆ usac_ch_pos_to_av

enum AVChannel usac_ch_pos_to_av[64]

static

Definition at line 50 of file aacdec_usac.c.

Referenced by ff_aac_usac_config_decode().

Macros

Functions

Variables

Macro Definition Documentation

◆ SFB_PER_PRED_BAND

Function Documentation

◆ get_escaped_value()

◆ decode_loudness_info()

◆ decode_loudness_set()

◆ decode_usac_sbr_data()

◆ decode_usac_element_core()

◆ decode_usac_element_pair()

◆ decode_usac_extension()

◆ ff_aac_usac_reset_state()

◆ ff_aac_usac_config_decode()

◆ decode_usac_scale_factors()

◆ decode_spectrum_ac()

◆ decode_usac_stereo_cplx()

◆ setup_sce()

◆ decode_usac_stereo_info()

◆ noise_random_sign()

◆ apply_noise_fill()

◆ spectrum_scale()

◆ complex_stereo_downmix_prev()

◆ complex_stereo_downmix_cur()

◆ complex_stereo_interpolate_imag()

◆ apply_complex_stereo()

◆ complex_stereo_get_filter()

◆ spectrum_decode()

◆ decode_usac_core_coder()

◆ parse_audio_preroll()

◆ parse_ext_ele()

◆ ff_aac_usac_decode_frame()

Variable Documentation

◆ usac_ch_pos_to_av