FFmpeg
Data Fields
AC3DecodeContext Struct Reference

#include <ac3dec.h>

Data Fields

AVClass *  class
  class for AVOptions
 
AVCodecContext *  avctx
  parent context
 
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
 
float *  outptr [AC3_MAX_CHANNELS]
 
float *  xcfptr [AC3_MAX_CHANNELS]
 
float *  dlyptr [AC3_MAX_CHANNELS]
 
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
 
AVFloatDSPContext  fdsp
 
AC3DSPContext  ac3dsp
 
FmtConvertContext  fmt_conv
  optimized conversion functions
 
Aligned arrays
int32_t  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 69 of file ac3dec.h.

Field Documentation

AVClass* AC3DecodeContext::class

class for AVOptions

Definition at line 70 of file ac3dec.h.

AVCodecContext* AC3DecodeContext::avctx

parent context

Definition at line 71 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().

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().

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().

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::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::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::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::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::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::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_layout

channel layout

Definition at line 84 of file ac3dec.h.

Referenced by ac3_decode_frame(), 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().

int AC3DecodeContext::channel_map

custom channel map

Definition at line 86 of file ac3dec.h.

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::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().

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::preferred_stereo_downmix

Definition at line 92 of file ac3dec.h.

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().

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().

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().

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::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().

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::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::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().

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::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().

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::phase_flags_in_use

phase flags in use (phsflginu)

Definition at line 112 of file ac3dec.h.

Referenced by decode_audio_block().

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::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().

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::firstchincpl

first channel in coupling

Definition at line 116 of file ac3dec.h.

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::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::spx_in_use

spectral extension in use (spxinu)

Definition at line 123 of file ac3dec.h.

Referenced by decode_audio_block().

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().

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().

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::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::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().

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().

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().

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::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().

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::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::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().

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().

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().

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::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::dynamic_range[2]

dynamic range

Definition at line 153 of file ac3dec.h.

Referenced by 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().

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::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::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::rematrixing_flags[4]

rematrixing flags (rematflg)

Definition at line 164 of file ac3dec.h.

Referenced by decode_audio_block(), and do_rematrixing().

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().

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().

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().

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::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().

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::fast_gain[AC3_MAX_CHANNELS]

fast gain values/SMR's (fgain)

Definition at line 177 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().

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().

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().

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().

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().

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().

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().

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().

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::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().

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().

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().

DSPContext AC3DecodeContext::dsp

for optimization

Definition at line 201 of file ac3dec.h.

Referenced by ac3_decode_frame(), and ac3_decode_init().

AVFloatDSPContext AC3DecodeContext::fdsp

Definition at line 202 of file ac3dec.h.

Referenced by ac3_decode_init(), and do_imdct().

AC3DSPContext AC3DecodeContext::ac3dsp

Definition at line 203 of file ac3dec.h.

Referenced by ac3_decode_init(), and decode_audio_block().

FmtConvertContext AC3DecodeContext::fmt_conv

optimized conversion functions

Definition at line 204 of file ac3dec.h.

Referenced by ac3_decode_init(), and decode_audio_block().

float* AC3DecodeContext::outptr[AC3_MAX_CHANNELS]

Definition at line 207 of file ac3dec.h.

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

float* AC3DecodeContext::xcfptr[AC3_MAX_CHANNELS]

Definition at line 208 of file ac3dec.h.

Referenced by ac3_decode_init(), and decode_audio_block().

float* AC3DecodeContext::dlyptr[AC3_MAX_CHANNELS]

Definition at line 209 of file ac3dec.h.

Referenced by ac3_decode_init(), and decode_audio_block().

int32_t AC3DecodeContext::fixed_coeffs[AC3_MAX_CHANNELS][AC3_MAX_COEFS]

fixed-point transform coefficients

Definition at line 212 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().

float AC3DecodeContext::transform_coeffs[AC3_MAX_CHANNELS][AC3_MAX_COEFS]

transform coefficients

Definition at line 213 of file ac3dec.h.

Referenced by ac3_decode_init(), decode_audio_block(), do_imdct(), and ff_eac3_apply_spectral_extension().

float AC3DecodeContext::delay[AC3_MAX_CHANNELS][AC3_BLOCK_SIZE]

delay - added to the next block

Definition at line 214 of file ac3dec.h.

Referenced by ac3_decode_init(), ac3_upmix_delay(), and do_imdct().

float AC3DecodeContext::window[AC3_BLOCK_SIZE]

window coefficients

Definition at line 215 of file ac3dec.h.

Referenced by ac3_decode_init(), and do_imdct().

float AC3DecodeContext::tmp_output[AC3_BLOCK_SIZE]

temporary storage for output before windowing

Definition at line 216 of file ac3dec.h.

Referenced by do_imdct().

float AC3DecodeContext::output[AC3_MAX_CHANNELS][AC3_BLOCK_SIZE]

output after imdct transform and windowing

Definition at line 217 of file ac3dec.h.

Referenced by ac3_decode_frame().

uint8_t AC3DecodeContext::input_buffer[AC3_FRAME_BUFFER_SIZE+FF_INPUT_BUFFER_PADDING_SIZE]

temp buffer to prevent overread

Definition at line 218 of file ac3dec.h.

Referenced by ac3_decode_frame().

The documentation for this struct was generated from the following file:
Generated on Wed Jul 10 2013 23:48:33 for FFmpeg by   doxygen 1.8.2

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