#include "libavutil/float_dsp.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "kbdwin.h"
#include "sinewin.h"
#include "aac.h"
#include "aacdec.h"
#include "aactab.h"
#include "aacdectab.h"
#include "adts_header.h"
#include "cbrt_data.h"
#include "sbr.h"
#include "aacsbr.h"
#include "mpeg4audio.h"
#include "profiles.h"
#include "libavutil/intfloat.h"
#include <errno.h>
#include <math.h>
#include <stdint.h>
#include <string.h>
#include "aacdec_template.c"

Data Structures
struct	LATMContext

Macros
#define	USE_FIXED 0

#define	TX_TYPE AV_TX_FLOAT_MDCT

#define	LOAS_SYNC_WORD 0x2b7
	11 bits LOAS sync word More...

Functions
static av_always_inline void	reset_predict_state (PredictorState *ps)

static float *	VMUL2 (float dst, const float v, unsigned idx, const float *scale)

static float *	VMUL4 (float dst, const float v, unsigned idx, const float *scale)

static float *	VMUL2S (float dst, const float v, unsigned idx, unsigned sign, const float *scale)

static float *	VMUL4S (float dst, const float v, unsigned idx, unsigned sign, const float *scale)

static av_always_inline float	flt16_round (float pf)

static av_always_inline float	flt16_even (float pf)

static av_always_inline float	flt16_trunc (float pf)

static av_always_inline void	predict (PredictorState ps, float coef, int output_enable)

static void	apply_dependent_coupling (AACDecContext ac, SingleChannelElement target, ChannelElement *cce, int index)
	Apply dependent channel coupling (applied before IMDCT). More...

static void	apply_independent_coupling (AACDecContext ac, SingleChannelElement target, ChannelElement *cce, int index)
	Apply independent channel coupling (applied after IMDCT). More...

static uint32_t	latm_get_value (GetBitContext *b)

static int	latm_decode_audio_specific_config (struct LATMContext latmctx, GetBitContext gb, int asclen)

static int	read_stream_mux_config (struct LATMContext latmctx, GetBitContext gb)

static int	read_payload_length_info (struct LATMContext ctx, GetBitContext gb)

static int	read_audio_mux_element (struct LATMContext latmctx, GetBitContext gb)

static int	latm_decode_frame (AVCodecContext avctx, AVFrame out, int got_frame_ptr, AVPacket avpkt)

static av_cold int	latm_decode_init (AVCodecContext *avctx)

Variables
static INTFLOAT	sine_120 [120]

static INTFLOAT	sine_960 [960]

static INTFLOAT	aac_kbd_long_960 [960]

static INTFLOAT	aac_kbd_short_120 [120]

const FFCodec	ff_aac_decoder

const FFCodec	ff_aac_latm_decoder

Detailed Description

AAC decoder

Author: Oded Shimon ( ods15 ods15 dyndns org ); Maxim Gavrilov ( maxim.gavrilov gmail com )

Definition in file aacdec.c.

Macro Definition Documentation

◆ USE_FIXED

#define USE_FIXED 0

Definition at line 35 of file aacdec.c.

◆ TX_TYPE

#define TX_TYPE AV_TX_FLOAT_MDCT

Definition at line 36 of file aacdec.c.

◆ LOAS_SYNC_WORD

#define LOAS_SYNC_WORD 0x2b7

11 bits LOAS sync word

Definition at line 262 of file aacdec.c.

Function Documentation

◆ reset_predict_state()

static av_always_inline void reset_predict_state ( PredictorState * ps )

static

Definition at line 74 of file aacdec.c.

Referenced by reset_all_predictors(), and reset_predictor_group().

◆ VMUL2()

static float* VMUL2	(	float *	dst,
		const float *	v,
		unsigned	idx,
		const float *	scale
	)

inlinestatic

Definition at line 85 of file aacdec.c.

Referenced by decode_spectrum_and_dequant().

◆ VMUL4()

static float* VMUL4	(	float *	dst,
		const float *	v,
		unsigned	idx,
		const float *	scale
	)

inlinestatic

Definition at line 96 of file aacdec.c.

Referenced by decode_spectrum_and_dequant().

◆ VMUL2S()

static float* VMUL2S	(	float *	dst,
		const float *	v,
		unsigned	idx,
		unsigned	sign,
		const float *	scale
	)

inlinestatic

Definition at line 109 of file aacdec.c.

Referenced by decode_spectrum_and_dequant().

◆ VMUL4S()

static float* VMUL4S	(	float *	dst,
		const float *	v,
		unsigned	idx,
		unsigned	sign,
		const float *	scale
	)

inlinestatic

Definition at line 126 of file aacdec.c.

Referenced by decode_spectrum_and_dequant().

◆ flt16_round()

static av_always_inline float flt16_round ( float pf )

static

Definition at line 152 of file aacdec.c.

Referenced by predict().

◆ flt16_even()

static av_always_inline float flt16_even ( float pf )

static

Definition at line 160 of file aacdec.c.

Referenced by predict().

◆ flt16_trunc()

static av_always_inline float flt16_trunc ( float pf )

static

Definition at line 168 of file aacdec.c.

Referenced by predict().

◆ predict()

static av_always_inline void predict	(	PredictorState *	ps,
		float *	coef,
		int	output_enable
	)

static

Definition at line 176 of file aacdec.c.

Referenced by apply_prediction(), decode_frame(), decode_line(), decode_macroblock(), and encode_line().

◆ apply_dependent_coupling()

static void apply_dependent_coupling	(	AACDecContext *	ac,
		SingleChannelElement *	target,
		ChannelElement *	cce,
		int	index
	)

static

Apply dependent channel coupling (applied before IMDCT).

Parameters

index index into coupling gain array

Definition at line 212 of file aacdec.c.

Referenced by spectral_to_sample().

◆ apply_independent_coupling()

static void apply_independent_coupling	(	AACDecContext *	ac,
		SingleChannelElement *	target,
		ChannelElement *	cce,
		int	index
	)

static

Apply independent channel coupling (applied after IMDCT).

Parameters

index index into coupling gain array

Definition at line 248 of file aacdec.c.

Referenced by spectral_to_sample().

◆ latm_get_value()

static uint32_t latm_get_value ( GetBitContext * b )

inlinestatic

Definition at line 274 of file aacdec.c.

Referenced by read_stream_mux_config().

◆ latm_decode_audio_specific_config()

static int latm_decode_audio_specific_config	(	struct LATMContext *	latmctx,
		GetBitContext *	gb,
		int	asclen
	)

static

Definition at line 281 of file aacdec.c.

Referenced by read_stream_mux_config().

◆ read_stream_mux_config()

static int read_stream_mux_config	(	struct LATMContext *	latmctx,
		GetBitContext *	gb
	)

static

Definition at line 349 of file aacdec.c.

Referenced by read_audio_mux_element().

◆ read_payload_length_info()

static int read_payload_length_info	(	struct LATMContext *	ctx,
		GetBitContext *	gb
	)

static

Definition at line 429 of file aacdec.c.

Referenced by read_audio_mux_element().

◆ read_audio_mux_element()

static int read_audio_mux_element	(	struct LATMContext *	latmctx,
		GetBitContext *	gb
	)

static

Definition at line 452 of file aacdec.c.

Referenced by latm_decode_frame().

◆ latm_decode_frame()

static int latm_decode_frame	(	AVCodecContext *	avctx,
		AVFrame *	out,
		int *	got_frame_ptr,
		AVPacket *	avpkt
	)

static

Definition at line 481 of file aacdec.c.

◆ latm_decode_init()

static av_cold int latm_decode_init ( AVCodecContext * avctx )

static

Definition at line 542 of file aacdec.c.

Variable Documentation

◆ sine_120

INTFLOAT sine_120[120]

static

Definition at line 69 of file aacdec.c.

Referenced by aac_static_table_init(), and imdct_and_windowing_960().

◆ sine_960

INTFLOAT sine_960[960]

static

Definition at line 70 of file aacdec.c.

Referenced by aac_static_table_init(), and imdct_and_windowing_960().

◆ aac_kbd_long_960

INTFLOAT aac_kbd_long_960[960]

static

Definition at line 71 of file aacdec.c.

Referenced by aac_static_table_init(), and imdct_and_windowing_960().

◆ aac_kbd_short_120

INTFLOAT aac_kbd_short_120[120]

static

Definition at line 72 of file aacdec.c.

Referenced by aac_static_table_init(), and imdct_and_windowing_960().

◆ ff_aac_decoder

const FFCodec ff_aac_decoder

Initial value:

= {
    .p.name          = "aac",
    CODEC_LONG_NAME("AAC (Advanced Audio Coding)"),
    .p.type          = AVMEDIA_TYPE_AUDIO,
    .p.id            = AV_CODEC_ID_AAC,
    .priv_data_size  = sizeof(AACDecContext),
    .init            = aac_decode_init,
    .close           = aac_decode_close,
    FF_CODEC_DECODE_CB(aac_decode_frame),
    .p.sample_fmts   = (const enum AVSampleFormat[]) {
        AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE
    },
    .p.capabilities  = AV_CODEC_CAP_CHANNEL_CONF | AV_CODEC_CAP_DR1,
    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
    .p.ch_layouts    = ff_aac_ch_layout,
    .flush = flush,
    .p.priv_class    = &aac_decoder_class,
    .p.profiles      = NULL_IF_CONFIG_SMALL(ff_aac_profiles),
}

Definition at line 553 of file aacdec.c.

◆ ff_aac_latm_decoder

const FFCodec ff_aac_latm_decoder

Initial value:

= {
    .p.name          = "aac_latm",
    CODEC_LONG_NAME("AAC LATM (Advanced Audio Coding LATM syntax)"),
    .p.type          = AVMEDIA_TYPE_AUDIO,
    .p.id            = AV_CODEC_ID_AAC_LATM,
    .priv_data_size  = sizeof(struct LATMContext),
    .init            = latm_decode_init,
    .close           = aac_decode_close,
    FF_CODEC_DECODE_CB(latm_decode_frame),
    .p.sample_fmts   = (const enum AVSampleFormat[]) {
        AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE
    },
    .p.capabilities  = AV_CODEC_CAP_CHANNEL_CONF | AV_CODEC_CAP_DR1,
    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
    .p.ch_layouts    = ff_aac_ch_layout,
    .flush = flush,
    .p.profiles      = NULL_IF_CONFIG_SMALL(ff_aac_profiles),
}

Definition at line 578 of file aacdec.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ USE_FIXED

◆ TX_TYPE

◆ LOAS_SYNC_WORD

Function Documentation

◆ reset_predict_state()

◆ VMUL2()

◆ VMUL4()

◆ VMUL2S()

◆ VMUL4S()

◆ flt16_round()

◆ flt16_even()

◆ flt16_trunc()

◆ predict()

◆ apply_dependent_coupling()

◆ apply_independent_coupling()

◆ latm_get_value()

◆ latm_decode_audio_specific_config()

◆ read_stream_mux_config()

◆ read_payload_length_info()

◆ read_audio_mux_element()

◆ latm_decode_frame()

◆ latm_decode_init()

Variable Documentation

◆ sine_120

◆ sine_960

◆ aac_kbd_long_960

◆ aac_kbd_short_120

◆ ff_aac_decoder

◆ ff_aac_latm_decoder