FFmpeg
Data Fields
WMACodecContext Struct Reference

#include <wma.h>

Data Fields

AVCodecContext *  avctx
 
GetBitContext  gb
 
PutBitContext  pb
 
int  version
  1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)
 
int  use_bit_reservoir
 
int  use_variable_block_len
 
int  use_exp_vlc
  exponent coding: 0 = lsp, 1 = vlc + delta
 
int  use_noise_coding
  true if perceptual noise is added
 
int  byte_offset_bits
 
VLC  exp_vlc
 
int  exponent_sizes [BLOCK_NB_SIZES]
 
uint16_t  exponent_bands [BLOCK_NB_SIZES][25]
 
int  high_band_start [BLOCK_NB_SIZES]
  index of first coef in high band
 
int  coefs_start
  first coded coef
 
int  coefs_end [BLOCK_NB_SIZES]
  max number of coded coefficients
 
int  exponent_high_sizes [BLOCK_NB_SIZES]
 
int  exponent_high_bands [BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]
 
VLC  hgain_vlc
 
int  high_band_coded [MAX_CHANNELS][HIGH_BAND_MAX_SIZE]
 
int  high_band_values [MAX_CHANNELS][HIGH_BAND_MAX_SIZE]
 
VLC  coef_vlc [2]
 
uint16_t *  run_table [2]
 
float *  level_table [2]
 
uint16_t *  int_table [2]
 
const CoefVLCTable *  coef_vlcs [2]
 
int  frame_len
  frame length in samples
 
int  frame_len_bits
  frame_len = 1 << frame_len_bits
 
int  nb_block_sizes
  number of block sizes
 
int  reset_block_lengths
 
int  block_len_bits
  log2 of current block length
 
int  next_block_len_bits
  log2 of next block length
 
int  prev_block_len_bits
  log2 of prev block length
 
int  block_len
  block length in samples
 
int  block_num
  block number in current frame
 
int  block_pos
  current position in frame
 
uint8_t  ms_stereo
  true if mid/side stereo mode
 
uint8_t  channel_coded [MAX_CHANNELS]
  true if channel is coded
 
int  exponents_bsize [MAX_CHANNELS]
  log2 ratio frame/exp. length
 
float  exponents [MAX_CHANNELS][BLOCK_MAX_SIZE]
 
float  max_exponent [MAX_CHANNELS]
 
WMACoef  coefs1 [MAX_CHANNELS][BLOCK_MAX_SIZE]
 
float  coefs [MAX_CHANNELS][BLOCK_MAX_SIZE]
 
FFTSample  output [BLOCK_MAX_SIZE *2]
 
FFTContext  mdct_ctx [BLOCK_NB_SIZES]
 
float *  windows [BLOCK_NB_SIZES]
 
float  frame_out [MAX_CHANNELS][BLOCK_MAX_SIZE *2]
 
uint8_t  last_superframe [MAX_CODED_SUPERFRAME_SIZE+FF_INPUT_BUFFER_PADDING_SIZE]
 
int  last_bitoffset
 
int  last_superframe_len
 
float  noise_table [NOISE_TAB_SIZE]
 
int  noise_index
 
float  noise_mult
 
float  lsp_cos_table [BLOCK_MAX_SIZE]
 
float  lsp_pow_e_table [256]
 
float  lsp_pow_m_table1 [(1<< LSP_POW_BITS)]
 
float  lsp_pow_m_table2 [(1<< LSP_POW_BITS)]
 
FmtConvertContext  fmt_conv
 
AVFloatDSPContext  fdsp
 

Detailed Description

Definition at line 66 of file wma.h.

Field Documentation

AVCodecContext* WMACodecContext::avctx

Definition at line 67 of file wma.h.

Referenced by decode_exp_vlc(), encode_block(), encode_frame(), encode_init(), ff_wma_init(), wma_decode_block(), wma_decode_frame(), wma_decode_init(), and wma_decode_superframe().

GetBitContext WMACodecContext::gb

Definition at line 68 of file wma.h.

Referenced by decode_exp_lsp(), decode_exp_vlc(), wma_decode_block(), and wma_decode_superframe().

PutBitContext WMACodecContext::pb

Definition at line 69 of file wma.h.

Referenced by encode_block(), encode_exp_vlc(), encode_frame(), and encode_superframe().

int WMACodecContext::version

1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)

Definition at line 70 of file wma.h.

Referenced by decode_exp_vlc(), encode_block(), encode_exp_vlc(), ff_wma_init(), and wma_decode_block().

int WMACodecContext::use_bit_reservoir

Definition at line 71 of file wma.h.

Referenced by encode_frame(), encode_init(), wma_decode_init(), and wma_decode_superframe().

int WMACodecContext::use_variable_block_len

Definition at line 72 of file wma.h.

Referenced by encode_block(), encode_init(), ff_wma_init(), wma_decode_block(), and wma_decode_init().

int WMACodecContext::use_exp_vlc

exponent coding: 0 = lsp, 1 = vlc + delta

Definition at line 73 of file wma.h.

Referenced by encode_block(), encode_init(), ff_wma_end(), ff_wma_init(), wma_decode_block(), and wma_decode_init().

int WMACodecContext::use_noise_coding

true if perceptual noise is added

Definition at line 74 of file wma.h.

Referenced by encode_block(), ff_wma_end(), ff_wma_init(), wma_decode_block(), and wma_decode_init().

int WMACodecContext::byte_offset_bits

Definition at line 75 of file wma.h.

Referenced by ff_wma_init(), and wma_decode_superframe().

VLC WMACodecContext::exp_vlc

Definition at line 76 of file wma.h.

Referenced by decode_exp_vlc(), ff_wma_end(), and wma_decode_init().

int WMACodecContext::exponent_sizes[BLOCK_NB_SIZES]

Definition at line 77 of file wma.h.

Referenced by ff_wma_init().

uint16_t WMACodecContext::exponent_bands[BLOCK_NB_SIZES][25]

Definition at line 78 of file wma.h.

Referenced by decode_exp_vlc(), encode_exp_vlc(), ff_wma_init(), and init_exp().

int WMACodecContext::high_band_start[BLOCK_NB_SIZES]

index of first coef in high band

Definition at line 79 of file wma.h.

Referenced by ff_wma_init(), and wma_decode_block().

int WMACodecContext::coefs_start

first coded coef

Definition at line 80 of file wma.h.

Referenced by encode_block(), ff_wma_init(), and wma_decode_block().

int WMACodecContext::coefs_end[BLOCK_NB_SIZES]

max number of coded coefficients

Definition at line 81 of file wma.h.

Referenced by encode_block(), ff_wma_init(), and wma_decode_block().

int WMACodecContext::exponent_high_sizes[BLOCK_NB_SIZES]

Definition at line 82 of file wma.h.

Referenced by encode_block(), ff_wma_init(), and wma_decode_block().

int WMACodecContext::exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]

Definition at line 83 of file wma.h.

Referenced by encode_block(), ff_wma_init(), and wma_decode_block().

VLC WMACodecContext::hgain_vlc

Definition at line 84 of file wma.h.

Referenced by ff_wma_end(), wma_decode_block(), and wma_decode_init().

int WMACodecContext::high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]

Definition at line 87 of file wma.h.

Referenced by encode_block(), and wma_decode_block().

int WMACodecContext::high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]

Definition at line 88 of file wma.h.

Referenced by wma_decode_block().

VLC WMACodecContext::coef_vlc[2]

Definition at line 92 of file wma.h.

Referenced by ff_wma_end(), and wma_decode_block().

uint16_t* WMACodecContext::run_table[2]

Definition at line 93 of file wma.h.

Referenced by ff_wma_end(), and wma_decode_block().

float* WMACodecContext::level_table[2]

Definition at line 94 of file wma.h.

Referenced by ff_wma_end(), and wma_decode_block().

uint16_t* WMACodecContext::int_table[2]

Definition at line 95 of file wma.h.

Referenced by encode_block(), and ff_wma_end().

const CoefVLCTable* WMACodecContext::coef_vlcs[2]

Definition at line 96 of file wma.h.

Referenced by encode_block().

int WMACodecContext::frame_len

frame length in samples

Definition at line 98 of file wma.h.

Referenced by encode_init(), ff_wma_init(), wma_decode_block(), wma_decode_frame(), wma_decode_init(), and wma_decode_superframe().

int WMACodecContext::frame_len_bits

frame_len = 1 << frame_len_bits

Definition at line 99 of file wma.h.

Referenced by apply_window_and_mdct(), decode_exp_vlc(), encode_block(), encode_exp_vlc(), encode_init(), encode_superframe(), ff_wma_init(), init_exp(), wma_decode_block(), wma_decode_init(), wma_decode_superframe(), and wma_window().

int WMACodecContext::nb_block_sizes

number of block sizes

Definition at line 100 of file wma.h.

Referenced by encode_init(), ff_wma_end(), ff_wma_init(), wma_decode_block(), and wma_decode_init().

int WMACodecContext::reset_block_lengths

Definition at line 102 of file wma.h.

Referenced by ff_wma_init(), wma_decode_block(), and wma_decode_superframe().

int WMACodecContext::block_len_bits

log2 of current block length

Definition at line 103 of file wma.h.

Referenced by apply_window_and_mdct(), decode_exp_vlc(), encode_block(), encode_exp_vlc(), encode_superframe(), ff_wma_init(), init_exp(), wma_decode_block(), wma_decode_superframe(), and wma_window().

int WMACodecContext::next_block_len_bits

log2 of next block length

Definition at line 104 of file wma.h.

Referenced by encode_block(), ff_wma_init(), wma_decode_block(), and wma_window().

int WMACodecContext::prev_block_len_bits

log2 of prev block length

Definition at line 105 of file wma.h.

Referenced by encode_block(), ff_wma_init(), wma_decode_block(), and wma_window().

int WMACodecContext::block_len

block length in samples

Definition at line 106 of file wma.h.

Referenced by decode_exp_lsp(), decode_exp_vlc(), encode_block(), encode_exp_vlc(), encode_superframe(), init_exp(), wma_decode_block(), wma_decode_superframe(), and wma_window().

int WMACodecContext::block_num

block number in current frame

Definition at line 107 of file wma.h.

Referenced by wma_decode_block(), and wma_decode_frame().

int WMACodecContext::block_pos

current position in frame

Definition at line 108 of file wma.h.

Referenced by wma_decode_block(), and wma_decode_frame().

uint8_t WMACodecContext::ms_stereo

true if mid/side stereo mode

Definition at line 109 of file wma.h.

Referenced by encode_block(), encode_init(), encode_superframe(), and wma_decode_block().

uint8_t WMACodecContext::channel_coded[MAX_CHANNELS]

true if channel is coded

Definition at line 110 of file wma.h.

Referenced by encode_block(), and wma_decode_block().

int WMACodecContext::exponents_bsize[MAX_CHANNELS]

log2 ratio frame/exp. length

Definition at line 111 of file wma.h.

Referenced by wma_decode_block().

float WMACodecContext::exponents[MAX_CHANNELS][BLOCK_MAX_SIZE]

Definition at line 112 of file wma.h.

Referenced by decode_exp_lsp(), decode_exp_vlc(), encode_block(), encode_exp_vlc(), init_exp(), and wma_decode_block().

float WMACodecContext::max_exponent[MAX_CHANNELS]

Definition at line 113 of file wma.h.

Referenced by decode_exp_lsp(), decode_exp_vlc(), encode_block(), init_exp(), and wma_decode_block().

WMACoef WMACodecContext::coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE]

Definition at line 114 of file wma.h.

Referenced by encode_block(), and wma_decode_block().

float WMACodecContext::coefs[MAX_CHANNELS][BLOCK_MAX_SIZE]

Definition at line 115 of file wma.h.

Referenced by apply_window_and_mdct(), encode_superframe(), and wma_decode_block().

FFTSample WMACodecContext::output[BLOCK_MAX_SIZE *2]

Definition at line 116 of file wma.h.

Referenced by apply_window_and_mdct(), wma_decode_block(), and wma_window().

FFTContext WMACodecContext::mdct_ctx[BLOCK_NB_SIZES]

Definition at line 117 of file wma.h.

Referenced by apply_window_and_mdct(), encode_init(), ff_wma_end(), wma_decode_block(), and wma_decode_init().

float* WMACodecContext::windows[BLOCK_NB_SIZES]

Definition at line 118 of file wma.h.

Referenced by apply_window_and_mdct(), ff_wma_init(), and wma_window().

float WMACodecContext::frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE *2]

Definition at line 120 of file wma.h.

Referenced by apply_window_and_mdct(), wma_decode_block(), and wma_decode_frame().

uint8_t WMACodecContext::last_superframe[MAX_CODED_SUPERFRAME_SIZE+FF_INPUT_BUFFER_PADDING_SIZE]

Definition at line 122 of file wma.h.

Referenced by wma_decode_superframe().

int WMACodecContext::last_bitoffset

Definition at line 123 of file wma.h.

Referenced by flush(), and wma_decode_superframe().

int WMACodecContext::last_superframe_len

Definition at line 124 of file wma.h.

Referenced by flush(), and wma_decode_superframe().

float WMACodecContext::noise_table[NOISE_TAB_SIZE]

Definition at line 125 of file wma.h.

Referenced by ff_wma_init(), and wma_decode_block().

int WMACodecContext::noise_index

Definition at line 126 of file wma.h.

Referenced by wma_decode_block().

float WMACodecContext::noise_mult

Definition at line 127 of file wma.h.

Referenced by ff_wma_init(), and wma_decode_block().

float WMACodecContext::lsp_cos_table[BLOCK_MAX_SIZE]

Definition at line 129 of file wma.h.

Referenced by wma_lsp_to_curve(), and wma_lsp_to_curve_init().

float WMACodecContext::lsp_pow_e_table[256]

Definition at line 130 of file wma.h.

Referenced by pow_m1_4(), and wma_lsp_to_curve_init().

float WMACodecContext::lsp_pow_m_table1[(1<< LSP_POW_BITS)]

Definition at line 131 of file wma.h.

Referenced by pow_m1_4(), and wma_lsp_to_curve_init().

float WMACodecContext::lsp_pow_m_table2[(1<< LSP_POW_BITS)]

Definition at line 132 of file wma.h.

Referenced by pow_m1_4(), and wma_lsp_to_curve_init().

FmtConvertContext WMACodecContext::fmt_conv

Definition at line 133 of file wma.h.

Referenced by ff_wma_init().

AVFloatDSPContext WMACodecContext::fdsp

Definition at line 134 of file wma.h.

Referenced by apply_window_and_mdct(), ff_wma_init(), wma_decode_block(), and wma_window().

The documentation for this struct was generated from the following file:
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