aacenc.h File Reference

#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "put_bits.h"
#include "aac.h"
#include "audio_frame_queue.h"
#include "psymodel.h"
#include "lpc.h"

Go to the source code of this file.

Data Structures
struct	AACEncOptions
struct	AACCoefficientsEncoder
struct	AACQuantizeBandCostCacheEntry
struct	AACPCEInfo
struct	AACEncContext
	AAC encoder context. More...

Enumerations
enum	AACCoder { AAC_CODER_ANMR = 0, AAC_CODER_TWOLOOP, AAC_CODER_FAST, AAC_CODER_NB }

Functions
void	ff_aac_dsp_init_x86 (AACEncContext *s)
void	ff_aac_coder_init_mips (AACEncContext *c)
void	ff_quantize_band_cost_cache_init (struct AACEncContext *s)

Variables
const AACCoefficientsEncoder	ff_aac_coders []
static const AACPCEInfo	aac_pce_configs []
	List of PCE (Program Configuration Element) for the channel layouts listed in channel_layout.h. More...

Enumeration Type Documentation

AACCoder

enum AACCoder

Enumerator
AAC_CODER_ANMR
AAC_CODER_TWOLOOP
AAC_CODER_FAST
AAC_CODER_NB

Definition at line 35 of file aacenc.h.

Function Documentation

ff_aac_dsp_init_x86()

void ff_aac_dsp_init_x86

(

AACEncContext *

s

)

Definition at line 34 of file aacencdsp_init.c.

Referenced by aac_encode_init().

ff_aac_coder_init_mips()

void ff_aac_coder_init_mips

(

AACEncContext *

c

)

Definition at line 2484 of file aaccoder_mips.c.

Referenced by aac_encode_init().

ff_quantize_band_cost_cache_init()

void ff_quantize_band_cost_cache_init

(

struct AACEncContext *

s

)

Definition at line 127 of file aacenc.c.

Referenced by search_for_quantizers_fast(), and search_for_quantizers_twoloop().

Variable Documentation

ff_aac_coders

const AACCoefficientsEncoder ff_aac_coders[]

Definition at line 897 of file aaccoder.c.

Referenced by aac_encode_init().

aac_pce_configs

const AACPCEInfo aac_pce_configs[]

static

List of PCE (Program Configuration Element) for the channel layouts listed in channel_layout.h.

For those wishing in the future to add other layouts:

• num_ele: number of elements in each group of front, side, back, lfe channels (an element is of type SCE (single channel), CPE (channel pair) for the first 3 groups; and is LFE for LFE group).
• pairing: 0 for an SCE element or 1 for a CPE; does not apply to LFE group

• index: there are three independent indices for SCE, CPE and LFE; they are incremented irrespective of the group to which the element belongs; they are not reset when going from one group to another

  Example: for 7.0 channel layout, .pairing = { { 1, 0 }, { 1 }, { 1 }, }, (3 CPE and 1 SCE in front group) .index = { { 0, 0 }, { 1 }, { 2 }, }, (index is 0 for the single SCE but goes from 0 to 2 for the CPEs)

  The index order impacts the channel ordering. But is otherwise arbitrary (the sequence could have been 2, 0, 1 instead of 0, 1, 2).

  Spec allows for discontinuous indices, e.g. if one has a total of two SCE, SCE.0 SCE.15 is OK per spec; BUT it won't be decoded by our AAC decoder which at this time requires that indices fully cover some range starting from 0 (SCE.1 SCE.0 is OK but not SCE.0 SCE.15).

• config_map: total number of elements and their types. Beware, the way the types are ordered impacts the final channel ordering.
• reorder_map: reorders the channels.

Definition at line 137 of file aacenc.h.

Referenced by aac_encode_init().