AC3DecodeContext Struct Reference

#include <ac3dec.h>


Data Fields

AVClass * class
class for AVOptions
AVCodecContext * avctx
parent context
AVFrame frame
AVFrame for decoded output.
GetBitContext gbc
bitstream reader
int preferred_stereo_downmix
float ltrt_center_mix_level
float ltrt_surround_mix_level
float loro_center_mix_level
float loro_surround_mix_level
Bit stream information
int frame_type
frame type (strmtyp)
int substreamid
substream identification
int frame_size
current frame size, in bytes
int bit_rate
stream bit rate, in bits-per-second
int sample_rate
sample frequency, in Hz
int num_blocks
number of audio blocks
int bitstream_mode
bitstream mode (bsmod)
int channel_mode
channel mode (acmod)
int channel_layout
channel layout
int lfe_on
lfe channel in use
int channel_map
custom channel map
int center_mix_level
Center mix level index.
int surround_mix_level
Surround mix level index.
int eac3
indicates if current frame is E-AC-3
Frame syntax parameters
int snr_offset_strategy
SNR offset strategy (snroffststr).
int block_switch_syntax
block switch syntax enabled (blkswe)
int dither_flag_syntax
dither flag syntax enabled (dithflage)
int bit_allocation_syntax
bit allocation model syntax enabled (bamode)
int fast_gain_syntax
fast gain codes enabled (frmfgaincode)
int dba_syntax
delta bit allocation syntax enabled (dbaflde)
int skip_syntax
skip field syntax enabled (skipflde)
Standard coupling
int cpl_in_use [AC3_MAX_BLOCKS]
coupling in use (cplinu)
int cpl_strategy_exists [AC3_MAX_BLOCKS]
coupling strategy exists (cplstre)
int channel_in_cpl [AC3_MAX_CHANNELS]
channel in coupling (chincpl)
int phase_flags_in_use
phase flags in use (phsflginu)
int phase_flags [AC3_MAX_CPL_BANDS]
phase flags (phsflg)
int num_cpl_bands
number of coupling bands (ncplbnd)
uint8_t cpl_band_sizes [AC3_MAX_CPL_BANDS]
number of coeffs in each coupling band
int firstchincpl
first channel in coupling
int first_cpl_coords [AC3_MAX_CHANNELS]
first coupling coordinates states (firstcplcos)
int cpl_coords [AC3_MAX_CHANNELS][AC3_MAX_CPL_BANDS]
coupling coordinates (cplco)
Spectral extension
int spx_in_use
spectral extension in use (spxinu)
uint8_t channel_uses_spx [AC3_MAX_CHANNELS]
channel uses spectral extension (chinspx)
int8_t spx_atten_code [AC3_MAX_CHANNELS]
spx attenuation code (spxattencod)
int spx_src_start_freq
spx start frequency bin
int spx_dst_end_freq
spx end frequency bin
int spx_dst_start_freq
spx starting frequency bin for copying (copystartmant) the copy region ends at the start of the spx region.
int num_spx_bands
number of spx bands (nspxbnds)
uint8_t spx_band_sizes [SPX_MAX_BANDS]
number of bins in each spx band
uint8_t first_spx_coords [AC3_MAX_CHANNELS]
first spx coordinates states (firstspxcos)
float spx_noise_blend [AC3_MAX_CHANNELS][SPX_MAX_BANDS]
spx noise blending factor (nblendfact)
float spx_signal_blend [AC3_MAX_CHANNELS][SPX_MAX_BANDS]
spx signal blending factor (sblendfact)
Adaptive hybrid transform
int channel_uses_aht [AC3_MAX_CHANNELS]
channel AHT in use (chahtinu)
int pre_mantissa [AC3_MAX_CHANNELS][AC3_MAX_COEFS][AC3_MAX_BLOCKS]
pre-IDCT mantissas
Channel
int fbw_channels
number of full-bandwidth channels
int channels
number of total channels
int lfe_ch
index of LFE channel
float downmix_coeffs [AC3_MAX_CHANNELS][2]
stereo downmix coefficients
int downmixed
indicates if coeffs are currently downmixed
int output_mode
output channel configuration
int out_channels
number of output channels
Dynamic range
float dynamic_range [2]
dynamic range
float drc_scale
percentage of dynamic range compression to be applied
Bandwidth
int start_freq [AC3_MAX_CHANNELS]
start frequency bin (strtmant)
int end_freq [AC3_MAX_CHANNELS]
end frequency bin (endmant)
Rematrixing
int num_rematrixing_bands
number of rematrixing bands (nrematbnd)
int rematrixing_flags [4]
rematrixing flags (rematflg)
Exponents
int num_exp_groups [AC3_MAX_CHANNELS]
Number of exponent groups (nexpgrp).
int8_t dexps [AC3_MAX_CHANNELS][AC3_MAX_COEFS]
decoded exponents
int exp_strategy [AC3_MAX_BLOCKS][AC3_MAX_CHANNELS]
exponent strategies (expstr)
Bit allocation
AC3BitAllocParameters bit_alloc_params
bit allocation parameters
int first_cpl_leak
first coupling leak state (firstcplleak)
int snr_offset [AC3_MAX_CHANNELS]
signal-to-noise ratio offsets (snroffst)
int fast_gain [AC3_MAX_CHANNELS]
fast gain values/SMR's (fgain)
uint8_t bap [AC3_MAX_CHANNELS][AC3_MAX_COEFS]
bit allocation pointers
int16_t psd [AC3_MAX_CHANNELS][AC3_MAX_COEFS]
scaled exponents
int16_t band_psd [AC3_MAX_CHANNELS][AC3_CRITICAL_BANDS]
interpolated exponents
int16_t mask [AC3_MAX_CHANNELS][AC3_CRITICAL_BANDS]
masking curve values
int dba_mode [AC3_MAX_CHANNELS]
delta bit allocation mode
int dba_nsegs [AC3_MAX_CHANNELS]
number of delta segments
uint8_t dba_offsets [AC3_MAX_CHANNELS][8]
delta segment offsets
uint8_t dba_lengths [AC3_MAX_CHANNELS][8]
delta segment lengths
uint8_t dba_values [AC3_MAX_CHANNELS][8]
delta values for each segment
Zero-mantissa dithering
int dither_flag [AC3_MAX_CHANNELS]
dither flags (dithflg)
AVLFG dith_state
for dither generation
IMDCT
int block_switch [AC3_MAX_CHANNELS]
block switch flags (blksw)
FFTContext imdct_512
for 512 sample IMDCT
FFTContext imdct_256
for 256 sample IMDCT
Optimization
DSPContext dsp
for optimization
AC3DSPContext ac3dsp
FmtConvertContext fmt_conv
optimized conversion functions
float mul_bias
scaling for float_to_int16 conversion
Aligned arrays
int fixed_coeffs [AC3_MAX_CHANNELS][AC3_MAX_COEFS]
fixed-point transform coefficients
float transform_coeffs [AC3_MAX_CHANNELS][AC3_MAX_COEFS]
transform coefficients
float delay [AC3_MAX_CHANNELS][AC3_BLOCK_SIZE]
delay - added to the next block
float window [AC3_BLOCK_SIZE]
window coefficients
float tmp_output [AC3_BLOCK_SIZE]
temporary storage for output before windowing
float output [AC3_MAX_CHANNELS][AC3_BLOCK_SIZE]
output after imdct transform and windowing
uint8_t input_buffer [AC3_FRAME_BUFFER_SIZE+FF_INPUT_BUFFER_PADDING_SIZE]
temp buffer to prevent overread

Detailed Description

Definition at line 68 of file ac3dec.h.

Field Documentation

AC3DSPContext AC3DecodeContext::ac3dsp

Definition at line 202 of file ac3dec.h.

Referenced by ac3_decode_init(), and decode_audio_block().

AVCodecContext* AC3DecodeContext::avctx

parent context

Definition at line 70 of file ac3dec.h.

Referenced by ac3_decode_init(), decode_audio_block(), ff_eac3_decode_transform_coeffs_aht_ch(), ff_eac3_parse_header(), and parse_frame_header().

int16_t AC3DecodeContext::band_psd[AC3_MAX_CHANNELS][AC3_CRITICAL_BANDS]

interpolated exponents

Definition at line 180 of file ac3dec.h.

Referenced by decode_audio_block().

uint8_t AC3DecodeContext::bap[AC3_MAX_CHANNELS][AC3_MAX_COEFS]

bit allocation pointers

Definition at line 178 of file ac3dec.h.

Referenced by ac3_decode_transform_coeffs_ch(), decode_audio_block(), ff_eac3_decode_transform_coeffs_aht_ch(), and remove_dithering().

AC3BitAllocParameters AC3DecodeContext::bit_alloc_params

bit allocation parameters

Definition at line 174 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::bit_allocation_syntax

bit allocation model syntax enabled (bamode)

Definition at line 102 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::bit_rate

stream bit rate, in bits-per-second

Definition at line 79 of file ac3dec.h.

Referenced by ac3_decode_frame(), and parse_frame_header().

int AC3DecodeContext::bitstream_mode

bitstream mode (bsmod)

Definition at line 82 of file ac3dec.h.

Referenced by ac3_decode_frame(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::block_switch[AC3_MAX_CHANNELS]

block switch flags (blksw)

Definition at line 195 of file ac3dec.h.

Referenced by decode_audio_block(), do_imdct(), and ff_eac3_parse_header().

int AC3DecodeContext::block_switch_syntax

block switch syntax enabled (blkswe)

Definition at line 100 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::center_mix_level

Center mix level index.

Definition at line 87 of file ac3dec.h.

Referenced by ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::channel_in_cpl[AC3_MAX_CHANNELS]

channel in coupling (chincpl)

Definition at line 111 of file ac3dec.h.

Referenced by calc_transform_coeffs_cpl(), decode_audio_block(), decode_transform_coeffs(), parse_frame_header(), and remove_dithering().

int AC3DecodeContext::channel_layout

channel layout

Definition at line 84 of file ac3dec.h.

Referenced by ac3_decode_frame(), and parse_frame_header().

int AC3DecodeContext::channel_map

custom channel map

Definition at line 86 of file ac3dec.h.

int AC3DecodeContext::channel_mode

channel mode (acmod)

Definition at line 83 of file ac3dec.h.

Referenced by ac3_decode_frame(), ac3_parse_header(), ac3_upmix_delay(), decode_audio_block(), ff_eac3_parse_header(), parse_frame_header(), and set_downmix_coeffs().

int AC3DecodeContext::channel_uses_aht[AC3_MAX_CHANNELS]

channel AHT in use (chahtinu)

Definition at line 138 of file ac3dec.h.

Referenced by decode_audio_block(), decode_transform_coeffs_ch(), ff_eac3_parse_header(), and parse_frame_header().

uint8_t AC3DecodeContext::channel_uses_spx[AC3_MAX_CHANNELS]

channel uses spectral extension (chinspx)

Definition at line 124 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_apply_spectral_extension().

int AC3DecodeContext::channels

number of total channels

Definition at line 144 of file ac3dec.h.

Referenced by ac3_decode_frame(), decode_audio_block(), decode_transform_coeffs(), ff_eac3_parse_header(), and parse_frame_header().

AVClass* AC3DecodeContext::class

class for AVOptions

Definition at line 69 of file ac3dec.h.

uint8_t AC3DecodeContext::cpl_band_sizes[AC3_MAX_CPL_BANDS]

number of coeffs in each coupling band

Definition at line 115 of file ac3dec.h.

Referenced by calc_transform_coeffs_cpl(), and decode_audio_block().

int AC3DecodeContext::cpl_coords[AC3_MAX_CHANNELS][AC3_MAX_CPL_BANDS]

coupling coordinates (cplco)

Definition at line 118 of file ac3dec.h.

Referenced by calc_transform_coeffs_cpl(), and decode_audio_block().

int AC3DecodeContext::cpl_in_use[AC3_MAX_BLOCKS]

coupling in use (cplinu)

Definition at line 109 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_parse_header().

int AC3DecodeContext::cpl_strategy_exists[AC3_MAX_BLOCKS]

coupling strategy exists (cplstre)

Definition at line 110 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_parse_header().

uint8_t AC3DecodeContext::dba_lengths[AC3_MAX_CHANNELS][8]

delta segment lengths

Definition at line 185 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::dba_mode[AC3_MAX_CHANNELS]

delta bit allocation mode

Definition at line 182 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::dba_nsegs[AC3_MAX_CHANNELS]

number of delta segments

Definition at line 183 of file ac3dec.h.

Referenced by decode_audio_block().

uint8_t AC3DecodeContext::dba_offsets[AC3_MAX_CHANNELS][8]

delta segment offsets

Definition at line 184 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::dba_syntax

delta bit allocation syntax enabled (dbaflde)

Definition at line 104 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

uint8_t AC3DecodeContext::dba_values[AC3_MAX_CHANNELS][8]

delta values for each segment

Definition at line 186 of file ac3dec.h.

Referenced by decode_audio_block().

float AC3DecodeContext::delay[AC3_MAX_CHANNELS][AC3_BLOCK_SIZE]

delay - added to the next block

Definition at line 210 of file ac3dec.h.

Referenced by ac3_upmix_delay(), decode_audio_block(), and do_imdct().

int8_t AC3DecodeContext::dexps[AC3_MAX_CHANNELS][AC3_MAX_COEFS]

decoded exponents

Definition at line 169 of file ac3dec.h.

Referenced by ac3_decode_transform_coeffs_ch(), decode_audio_block(), and decode_transform_coeffs_ch().

AVLFG AC3DecodeContext::dith_state

for dither generation

Definition at line 191 of file ac3dec.h.

Referenced by ac3_decode_init(), ac3_decode_transform_coeffs_ch(), ff_eac3_apply_spectral_extension(), and ff_eac3_decode_transform_coeffs_aht_ch().

int AC3DecodeContext::dither_flag[AC3_MAX_CHANNELS]

dither flags (dithflg)

Definition at line 190 of file ac3dec.h.

Referenced by ac3_decode_transform_coeffs_ch(), decode_audio_block(), ff_eac3_parse_header(), and remove_dithering().

int AC3DecodeContext::dither_flag_syntax

dither flag syntax enabled (dithflage)

Definition at line 101 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

float AC3DecodeContext::downmix_coeffs[AC3_MAX_CHANNELS][2]

stereo downmix coefficients

Definition at line 146 of file ac3dec.h.

Referenced by decode_audio_block(), and set_downmix_coeffs().

int AC3DecodeContext::downmixed

indicates if coeffs are currently downmixed

Definition at line 147 of file ac3dec.h.

Referenced by ac3_decode_init(), and decode_audio_block().

float AC3DecodeContext::drc_scale

percentage of dynamic range compression to be applied

Definition at line 154 of file ac3dec.h.

Referenced by decode_audio_block().

DSPContext AC3DecodeContext::dsp

for optimization

Definition at line 201 of file ac3dec.h.

Referenced by ac3_decode_frame(), ac3_decode_init(), and do_imdct().

float AC3DecodeContext::dynamic_range[2]

dynamic range

Definition at line 153 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::eac3

indicates if current frame is E-AC-3

Definition at line 89 of file ac3dec.h.

Referenced by decode_audio_block(), and parse_frame_header().

int AC3DecodeContext::end_freq[AC3_MAX_CHANNELS]

end frequency bin (endmant)

Definition at line 159 of file ac3dec.h.

Referenced by ac3_decode_transform_coeffs_ch(), decode_audio_block(), decode_transform_coeffs(), do_rematrixing(), and parse_frame_header().

int AC3DecodeContext::exp_strategy[AC3_MAX_BLOCKS][AC3_MAX_CHANNELS]

exponent strategies (expstr)

Definition at line 170 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_parse_header().

int AC3DecodeContext::fast_gain[AC3_MAX_CHANNELS]

fast gain values/SMR's (fgain)

Definition at line 177 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::fast_gain_syntax

fast gain codes enabled (frmfgaincode)

Definition at line 103 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::fbw_channels

number of full-bandwidth channels

Definition at line 143 of file ac3dec.h.

Referenced by ac3_decode_frame(), calc_transform_coeffs_cpl(), decode_audio_block(), ff_eac3_apply_spectral_extension(), ff_eac3_parse_header(), parse_frame_header(), remove_dithering(), and set_downmix_coeffs().

int AC3DecodeContext::first_cpl_coords[AC3_MAX_CHANNELS]

first coupling coordinates states (firstcplcos)

Definition at line 117 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_parse_header().

int AC3DecodeContext::first_cpl_leak

first coupling leak state (firstcplleak)

Definition at line 175 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

uint8_t AC3DecodeContext::first_spx_coords[AC3_MAX_CHANNELS]

first spx coordinates states (firstspxcos)

Definition at line 132 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_parse_header().

int AC3DecodeContext::firstchincpl

first channel in coupling

Definition at line 116 of file ac3dec.h.

int AC3DecodeContext::fixed_coeffs[AC3_MAX_CHANNELS][AC3_MAX_COEFS]

fixed-point transform coefficients

Definition at line 208 of file ac3dec.h.

Referenced by ac3_decode_transform_coeffs_ch(), calc_transform_coeffs_cpl(), decode_audio_block(), decode_transform_coeffs(), decode_transform_coeffs_ch(), do_rematrixing(), and remove_dithering().

FmtConvertContext AC3DecodeContext::fmt_conv

optimized conversion functions

Definition at line 203 of file ac3dec.h.

Referenced by ac3_decode_frame(), ac3_decode_init(), and decode_audio_block().

AVFrame AC3DecodeContext::frame

AVFrame for decoded output.

Definition at line 71 of file ac3dec.h.

Referenced by ac3_decode_frame(), and ac3_decode_init().

int AC3DecodeContext::frame_size

current frame size, in bytes

Definition at line 78 of file ac3dec.h.

Referenced by ac3_decode_frame(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::frame_type

frame type (strmtyp)

Definition at line 76 of file ac3dec.h.

Referenced by ac3_decode_frame(), decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

GetBitContext AC3DecodeContext::gbc

bitstream reader

Definition at line 72 of file ac3dec.h.

Referenced by ac3_decode_frame(), ac3_decode_transform_coeffs_ch(), ac3_parse_header(), decode_audio_block(), ff_eac3_decode_transform_coeffs_aht_ch(), ff_eac3_parse_header(), and parse_frame_header().

FFTContext AC3DecodeContext::imdct_256

for 256 sample IMDCT

Definition at line 197 of file ac3dec.h.

Referenced by ac3_decode_end(), ac3_decode_init(), and do_imdct().

FFTContext AC3DecodeContext::imdct_512

for 512 sample IMDCT

Definition at line 196 of file ac3dec.h.

Referenced by ac3_decode_end(), ac3_decode_init(), and do_imdct().

uint8_t AC3DecodeContext::input_buffer[AC3_FRAME_BUFFER_SIZE+FF_INPUT_BUFFER_PADDING_SIZE]

temp buffer to prevent overread

Definition at line 214 of file ac3dec.h.

Referenced by ac3_decode_frame().

int AC3DecodeContext::lfe_ch

index of LFE channel

Definition at line 145 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::lfe_on

lfe channel in use

Definition at line 85 of file ac3dec.h.

Referenced by ac3_decode_frame(), ff_eac3_parse_header(), and parse_frame_header().

float AC3DecodeContext::loro_center_mix_level

Definition at line 95 of file ac3dec.h.

Referenced by ac3_decode_frame().

float AC3DecodeContext::loro_surround_mix_level

Definition at line 96 of file ac3dec.h.

Referenced by ac3_decode_frame().

float AC3DecodeContext::ltrt_center_mix_level

Definition at line 93 of file ac3dec.h.

Referenced by ac3_decode_frame().

float AC3DecodeContext::ltrt_surround_mix_level

Definition at line 94 of file ac3dec.h.

Referenced by ac3_decode_frame().

int16_t AC3DecodeContext::mask[AC3_MAX_CHANNELS][AC3_CRITICAL_BANDS]

masking curve values

Definition at line 181 of file ac3dec.h.

Referenced by decode_audio_block().

float AC3DecodeContext::mul_bias

scaling for float_to_int16 conversion

Definition at line 204 of file ac3dec.h.

Referenced by ac3_decode_init(), and decode_audio_block().

int AC3DecodeContext::num_blocks

number of audio blocks

Definition at line 81 of file ac3dec.h.

Referenced by ac3_decode_frame(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::num_cpl_bands

number of coupling bands (ncplbnd)

Definition at line 114 of file ac3dec.h.

Referenced by calc_transform_coeffs_cpl(), and decode_audio_block().

int AC3DecodeContext::num_exp_groups[AC3_MAX_CHANNELS]

Number of exponent groups (nexpgrp).

Definition at line 168 of file ac3dec.h.

Referenced by decode_audio_block(), and parse_frame_header().

int AC3DecodeContext::num_rematrixing_bands

number of rematrixing bands (nrematbnd)

Definition at line 163 of file ac3dec.h.

Referenced by decode_audio_block(), and do_rematrixing().

int AC3DecodeContext::num_spx_bands

number of spx bands (nspxbnds)

Definition at line 130 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_apply_spectral_extension().

int AC3DecodeContext::out_channels

number of output channels

Definition at line 149 of file ac3dec.h.

Referenced by ac3_decode_frame(), and decode_audio_block().

float AC3DecodeContext::output[AC3_MAX_CHANNELS][AC3_BLOCK_SIZE]

output after imdct transform and windowing

Definition at line 213 of file ac3dec.h.

Referenced by ac3_decode_frame(), decode_audio_block(), and do_imdct().

int AC3DecodeContext::output_mode

output channel configuration

Definition at line 148 of file ac3dec.h.

Referenced by ac3_decode_frame(), decode_audio_block(), and set_downmix_coeffs().

int AC3DecodeContext::phase_flags[AC3_MAX_CPL_BANDS]

phase flags (phsflg)

Definition at line 113 of file ac3dec.h.

Referenced by calc_transform_coeffs_cpl(), and decode_audio_block().

int AC3DecodeContext::phase_flags_in_use

phase flags in use (phsflginu)

Definition at line 112 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::pre_mantissa[AC3_MAX_CHANNELS][AC3_MAX_COEFS][AC3_MAX_BLOCKS]

pre-IDCT mantissas

Definition at line 139 of file ac3dec.h.

Referenced by decode_transform_coeffs_ch(), and ff_eac3_decode_transform_coeffs_aht_ch().

int AC3DecodeContext::preferred_stereo_downmix

Definition at line 92 of file ac3dec.h.

int16_t AC3DecodeContext::psd[AC3_MAX_CHANNELS][AC3_MAX_COEFS]

scaled exponents

Definition at line 179 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::rematrixing_flags[4]

rematrixing flags (rematflg)

Definition at line 164 of file ac3dec.h.

Referenced by decode_audio_block(), and do_rematrixing().

int AC3DecodeContext::sample_rate

sample frequency, in Hz

Definition at line 80 of file ac3dec.h.

Referenced by ac3_decode_frame(), and parse_frame_header().

int AC3DecodeContext::skip_syntax

skip field syntax enabled (skipflde)

Definition at line 105 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::snr_offset[AC3_MAX_CHANNELS]

signal-to-noise ratio offsets (snroffst)

Definition at line 176 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_parse_header().

int AC3DecodeContext::snr_offset_strategy

SNR offset strategy (snroffststr).

Definition at line 99 of file ac3dec.h.

Referenced by decode_audio_block(), ff_eac3_parse_header(), and parse_frame_header().

int8_t AC3DecodeContext::spx_atten_code[AC3_MAX_CHANNELS]

spx attenuation code (spxattencod)

Definition at line 125 of file ac3dec.h.

Referenced by ff_eac3_apply_spectral_extension(), and ff_eac3_parse_header().

uint8_t AC3DecodeContext::spx_band_sizes[SPX_MAX_BANDS]

number of bins in each spx band

Definition at line 131 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_apply_spectral_extension().

int AC3DecodeContext::spx_dst_end_freq

spx end frequency bin

Definition at line 127 of file ac3dec.h.

Referenced by decode_audio_block().

int AC3DecodeContext::spx_dst_start_freq

spx starting frequency bin for copying (copystartmant) the copy region ends at the start of the spx region.

Definition at line 128 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_apply_spectral_extension().

int AC3DecodeContext::spx_in_use

spectral extension in use (spxinu)

Definition at line 123 of file ac3dec.h.

Referenced by decode_audio_block().

float AC3DecodeContext::spx_noise_blend[AC3_MAX_CHANNELS][SPX_MAX_BANDS]

spx noise blending factor (nblendfact)

Definition at line 133 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_apply_spectral_extension().

float AC3DecodeContext::spx_signal_blend[AC3_MAX_CHANNELS][SPX_MAX_BANDS]

spx signal blending factor (sblendfact)

Definition at line 134 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_apply_spectral_extension().

int AC3DecodeContext::spx_src_start_freq

spx start frequency bin

Definition at line 126 of file ac3dec.h.

Referenced by decode_audio_block(), and ff_eac3_apply_spectral_extension().

int AC3DecodeContext::start_freq[AC3_MAX_CHANNELS]

start frequency bin (strtmant)

Definition at line 158 of file ac3dec.h.

Referenced by ac3_decode_transform_coeffs_ch(), calc_transform_coeffs_cpl(), decode_audio_block(), decode_transform_coeffs_ch(), ff_eac3_decode_transform_coeffs_aht_ch(), parse_frame_header(), and remove_dithering().

int AC3DecodeContext::substreamid

substream identification

Definition at line 77 of file ac3dec.h.

Referenced by ac3_decode_frame(), ff_eac3_parse_header(), and parse_frame_header().

int AC3DecodeContext::surround_mix_level

Surround mix level index.

Definition at line 88 of file ac3dec.h.

Referenced by ac3_decode_frame(), ff_eac3_parse_header(), parse_frame_header(), and set_downmix_coeffs().

float AC3DecodeContext::tmp_output[AC3_BLOCK_SIZE]

temporary storage for output before windowing

Definition at line 212 of file ac3dec.h.

Referenced by do_imdct().

float AC3DecodeContext::transform_coeffs[AC3_MAX_CHANNELS][AC3_MAX_COEFS]

transform coefficients

Definition at line 209 of file ac3dec.h.

Referenced by decode_audio_block(), do_imdct(), and ff_eac3_apply_spectral_extension().

float AC3DecodeContext::window[AC3_BLOCK_SIZE]

window coefficients

Definition at line 211 of file ac3dec.h.

Referenced by ac3_decode_init(), and do_imdct().

The documentation for this struct was generated from the following file:
Generated on Fri Oct 26 02:50:14 2012 for FFmpeg by doxygen 1.5.8

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