Macros
#define	EAC3_MAX_CHANNELS 16
	maximum number of channels in EAC3

#define	AC3_MAX_CHANNELS 7
	maximum number of channels, including coupling channel

#define	CPL_CH 0
	coupling channel index

#define	AC3_MAX_COEFS 256

#define	AC3_BLOCK_SIZE 256

#define	AC3_MAX_BLOCKS 6

#define	AC3_FRAME_SIZE (AC3_MAX_BLOCKS * 256)

#define	AC3_WINDOW_SIZE (AC3_BLOCK_SIZE * 2)

#define	AC3_CRITICAL_BANDS 50

#define	AC3_MAX_CPL_BANDS 18

#define	EAC3_SR_CODE_REDUCED 3

#define	LEVEL_PLUS_3DB M_SQRT2

#define	LEVEL_PLUS_1POINT5DB 1.1892071150027209

#define	LEVEL_MINUS_1POINT5DB 0.8408964152537145

#define	LEVEL_MINUS_3DB M_SQRT1_2

#define	LEVEL_MINUS_4POINT5DB 0.5946035575013605

#define	LEVEL_MINUS_6DB 0.5000000000000000

#define	LEVEL_MINUS_9DB 0.3535533905932738

#define	LEVEL_ZERO 0.0000000000000000

#define	LEVEL_ONE 1.0000000000000000

#define	EXP_REUSE 0

#define	EXP_NEW 1

#define	EXP_D15 1

#define	EXP_D25 2

#define	EXP_D45 3

Enumerations
enum	AC3DeltaStrategy { DBA_REUSE = 0 , DBA_NEW , DBA_NONE , DBA_RESERVED }
	Delta bit allocation strategy. More...

enum	AC3ChannelMode { AC3_CHMODE_DUALMONO = 0 , AC3_CHMODE_MONO , AC3_CHMODE_STEREO , AC3_CHMODE_3F , AC3_CHMODE_2F1R , AC3_CHMODE_3F1R , AC3_CHMODE_2F2R , AC3_CHMODE_3F2R }
	Channel mode (audio coding mode) More...

enum	AC3DolbySurroundMode { AC3_DSURMOD_NOTINDICATED = 0 , AC3_DSURMOD_OFF , AC3_DSURMOD_ON , AC3_DSURMOD_RESERVED }
	Dolby Surround mode. More...

enum	AC3DolbySurroundEXMode { AC3_DSUREXMOD_NOTINDICATED = 0 , AC3_DSUREXMOD_OFF , AC3_DSUREXMOD_ON , AC3_DSUREXMOD_PLIIZ }
	Dolby Surround EX mode. More...

enum	AC3DolbyHeadphoneMode { AC3_DHEADPHONMOD_NOTINDICATED = 0 , AC3_DHEADPHONMOD_OFF , AC3_DHEADPHONMOD_ON , AC3_DHEADPHONMOD_RESERVED }
	Dolby Headphone mode. More...

enum	AC3PreferredStereoDownmixMode { AC3_DMIXMOD_NOTINDICATED = 0 , AC3_DMIXMOD_LTRT , AC3_DMIXMOD_LORO , AC3_DMIXMOD_DPLII }
	Preferred Stereo Downmix mode. More...

enum	EAC3FrameType { EAC3_FRAME_TYPE_INDEPENDENT = 0 , EAC3_FRAME_TYPE_DEPENDENT , EAC3_FRAME_TYPE_AC3_CONVERT , EAC3_FRAME_TYPE_RESERVED }

Macro Definition Documentation

◆ EAC3_MAX_CHANNELS

#define EAC3_MAX_CHANNELS 16

maximum number of channels in EAC3

Definition at line 25 of file ac3defs.h.

Referenced by ac3_decode_frame().

◆ AC3_MAX_CHANNELS

#define AC3_MAX_CHANNELS 7

maximum number of channels, including coupling channel

Definition at line 26 of file ac3defs.h.

Referenced by ac3_decode_frame(), ac3_decode_init(), apply_channel_coupling(), coupling_strategy(), decode_audio_block(), ff_eac3_set_cpl_states(), and set_downmix_coeffs().

◆ CPL_CH

#define CPL_CH 0

◆ AC3_MAX_COEFS

#define AC3_MAX_COEFS 256

Definition at line 29 of file ac3defs.h.

Referenced by ac3_bit_alloc_calc_bap_c(), allocate_buffers(), compute_exp_strategy(), encode_exponents(), extract_exponents(), ff_eac3_decode_transform_coeffs_aht_ch(), reset_block_bap(), scale_coefficients(), and set_bandwidth().

◆ AC3_BLOCK_SIZE

#define AC3_BLOCK_SIZE 256

Definition at line 30 of file ac3defs.h.

Referenced by ac3_adjust_frame_size(), ac3_decode_frame(), ac3_fixed_mdct_init(), ac3_float_mdct_init(), allocate_buffers(), apply_mdct(), ff_ac3_encode_init(), and validate_options().

◆ AC3_MAX_BLOCKS

#define AC3_MAX_BLOCKS 6

Definition at line 31 of file ac3defs.h.

Referenced by ac3_compute_mantissa_size_c(), apply_channel_coupling(), count_mantissa_bits(), count_mantissa_bits_init(), and count_mantissa_bits_update_ch().

◆ AC3_FRAME_SIZE

#define AC3_FRAME_SIZE (AC3_MAX_BLOCKS * 256)

Definition at line 32 of file ac3defs.h.

Referenced by spdif_get_offset_and_codec(), spdif_header_ac3(), and validate_options().

◆ AC3_WINDOW_SIZE

#define AC3_WINDOW_SIZE (AC3_BLOCK_SIZE * 2)

Definition at line 33 of file ac3defs.h.

Referenced by ac3_float_mdct_init().

◆ AC3_CRITICAL_BANDS

#define AC3_CRITICAL_BANDS 50

Definition at line 34 of file ac3defs.h.

Referenced by ff_ac3_bit_alloc_calc_mask().

◆ AC3_MAX_CPL_BANDS

#define AC3_MAX_CPL_BANDS 18

Definition at line 35 of file ac3defs.h.

◆ EAC3_SR_CODE_REDUCED

#define EAC3_SR_CODE_REDUCED 3

Definition at line 37 of file ac3defs.h.

Referenced by ff_eac3_parse_header().

◆ LEVEL_PLUS_3DB

#define LEVEL_PLUS_3DB M_SQRT2

Definition at line 40 of file ac3defs.h.

◆ LEVEL_PLUS_1POINT5DB

#define LEVEL_PLUS_1POINT5DB 1.1892071150027209

Definition at line 41 of file ac3defs.h.

◆ LEVEL_MINUS_1POINT5DB

#define LEVEL_MINUS_1POINT5DB 0.8408964152537145

Definition at line 42 of file ac3defs.h.

◆ LEVEL_MINUS_3DB

#define LEVEL_MINUS_3DB M_SQRT1_2

Definition at line 43 of file ac3defs.h.

Referenced by set_downmix_coeffs().

◆ LEVEL_MINUS_4POINT5DB

#define LEVEL_MINUS_4POINT5DB 0.5946035575013605

Definition at line 44 of file ac3defs.h.

◆ LEVEL_MINUS_6DB

#define LEVEL_MINUS_6DB 0.5000000000000000

Definition at line 45 of file ac3defs.h.

◆ LEVEL_MINUS_9DB

#define LEVEL_MINUS_9DB 0.3535533905932738

Definition at line 46 of file ac3defs.h.

◆ LEVEL_ZERO

#define LEVEL_ZERO 0.0000000000000000

Definition at line 47 of file ac3defs.h.

◆ LEVEL_ONE

#define LEVEL_ONE 1.0000000000000000

Definition at line 48 of file ac3defs.h.

◆ EXP_REUSE

#define EXP_REUSE 0

Definition at line 51 of file ac3defs.h.

Referenced by ac3_group_exponents(), bit_alloc(), bit_alloc_masking(), compute_exp_strategy(), count_exponent_bits(), count_frame_bits(), decode_audio_block(), encode_exponents(), ff_eac3_parse_header(), and output_audio_block().

◆ EXP_NEW

#define EXP_NEW 1

Definition at line 52 of file ac3defs.h.

Referenced by compute_exp_strategy().

◆ EXP_D15

#define EXP_D15 1

Definition at line 54 of file ac3defs.h.

Referenced by compute_exp_strategy(), and exponent_init().

◆ EXP_D25

#define EXP_D25 2

Definition at line 55 of file ac3defs.h.

Referenced by encode_exponents_blk_ch().

◆ EXP_D45

#define EXP_D45 3

Definition at line 56 of file ac3defs.h.

Referenced by ac3_group_exponents(), decode_exponents(), encode_exponents_blk_ch(), and exponent_init().

Enumeration Type Documentation

◆ AC3DeltaStrategy

enum AC3DeltaStrategy

Delta bit allocation strategy.

Enumerator
DBA_REUSE
DBA_NEW
DBA_NONE
DBA_RESERVED

Definition at line 59 of file ac3defs.h.

◆ AC3ChannelMode

enum AC3ChannelMode

Channel mode (audio coding mode)

Enumerator
AC3_CHMODE_DUALMONO
AC3_CHMODE_MONO
AC3_CHMODE_STEREO
AC3_CHMODE_3F
AC3_CHMODE_2F1R
AC3_CHMODE_3F1R
AC3_CHMODE_2F2R
AC3_CHMODE_3F2R

Definition at line 67 of file ac3defs.h.

◆ AC3DolbySurroundMode

enum AC3DolbySurroundMode

Dolby Surround mode.

Enumerator
AC3_DSURMOD_NOTINDICATED
AC3_DSURMOD_OFF
AC3_DSURMOD_ON
AC3_DSURMOD_RESERVED

Definition at line 79 of file ac3defs.h.

◆ AC3DolbySurroundEXMode

enum AC3DolbySurroundEXMode

Dolby Surround EX mode.

Enumerator
AC3_DSUREXMOD_NOTINDICATED
AC3_DSUREXMOD_OFF
AC3_DSUREXMOD_ON
AC3_DSUREXMOD_PLIIZ

Definition at line 87 of file ac3defs.h.

◆ AC3DolbyHeadphoneMode

enum AC3DolbyHeadphoneMode

Dolby Headphone mode.

Enumerator
AC3_DHEADPHONMOD_NOTINDICATED
AC3_DHEADPHONMOD_OFF
AC3_DHEADPHONMOD_ON
AC3_DHEADPHONMOD_RESERVED

Definition at line 95 of file ac3defs.h.

◆ AC3PreferredStereoDownmixMode

enum AC3PreferredStereoDownmixMode

Preferred Stereo Downmix mode.

Enumerator
AC3_DMIXMOD_NOTINDICATED
AC3_DMIXMOD_LTRT
AC3_DMIXMOD_LORO
AC3_DMIXMOD_DPLII

Definition at line 103 of file ac3defs.h.

◆ EAC3FrameType

enum EAC3FrameType

Enumerator
EAC3_FRAME_TYPE_INDEPENDENT
EAC3_FRAME_TYPE_DEPENDENT
EAC3_FRAME_TYPE_AC3_CONVERT
EAC3_FRAME_TYPE_RESERVED

Definition at line 110 of file ac3defs.h.

Macros

Enumerations