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]

float output [BLOCK_MAX_SIZE *2]

AVTXContext * mdct_ctx [BLOCK_NB_SIZES]

av_tx_fn mdct_fn [BLOCK_NB_SIZES]

const float * windows [BLOCK_NB_SIZES]

float frame_out [MAX_CHANNELS][BLOCK_MAX_SIZE *2]

uint8_t last_superframe [MAX_CODED_SUPERFRAME_SIZE+AV_INPUT_BUFFER_PADDING_SIZE]

int last_bitoffset

int last_superframe_len

int exponents_initialized [MAX_CHANNELS]

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)]

AVFloatDSPContext * fdsp

int eof_done

Detailed Description

Definition at line 68 of file wma.h.

Field Documentation

◆ avctx

AVCodecContext* WMACodecContext::avctx

Definition at line 69 of file wma.h.

◆ gb

GetBitContext WMACodecContext::gb

Definition at line 70 of file wma.h.

◆ pb

PutBitContext WMACodecContext::pb

Definition at line 71 of file wma.h.

◆ version

int WMACodecContext::version

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

Definition at line 72 of file wma.h.

◆ use_bit_reservoir

int WMACodecContext::use_bit_reservoir

Definition at line 73 of file wma.h.

◆ use_variable_block_len

int WMACodecContext::use_variable_block_len

Definition at line 74 of file wma.h.

◆ use_exp_vlc

int WMACodecContext::use_exp_vlc

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

Definition at line 75 of file wma.h.

◆ use_noise_coding

int WMACodecContext::use_noise_coding

true if perceptual noise is added

Definition at line 76 of file wma.h.

◆ byte_offset_bits

int WMACodecContext::byte_offset_bits

Definition at line 77 of file wma.h.

◆ exp_vlc

VLC WMACodecContext::exp_vlc

Definition at line 78 of file wma.h.

◆ exponent_sizes

int WMACodecContext::exponent_sizes[BLOCK_NB_SIZES]

Definition at line 79 of file wma.h.

◆ exponent_bands

uint16_t WMACodecContext::exponent_bands[BLOCK_NB_SIZES][25]

Definition at line 80 of file wma.h.

◆ high_band_start

int WMACodecContext::high_band_start[BLOCK_NB_SIZES]

index of first coef in high band

Definition at line 81 of file wma.h.

◆ coefs_start

int WMACodecContext::coefs_start

first coded coef

Definition at line 82 of file wma.h.

◆ coefs_end

int WMACodecContext::coefs_end[BLOCK_NB_SIZES]

max number of coded coefficients

Definition at line 83 of file wma.h.

◆ exponent_high_sizes

int WMACodecContext::exponent_high_sizes[BLOCK_NB_SIZES]

Definition at line 84 of file wma.h.

◆ exponent_high_bands

int WMACodecContext::exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]

Definition at line 85 of file wma.h.

◆ hgain_vlc

VLC WMACodecContext::hgain_vlc

Definition at line 86 of file wma.h.

◆ high_band_coded

int WMACodecContext::high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]

Definition at line 89 of file wma.h.

◆ high_band_values

int WMACodecContext::high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]

Definition at line 90 of file wma.h.

◆ coef_vlc

VLC WMACodecContext::coef_vlc[2]

Definition at line 94 of file wma.h.

◆ run_table

uint16_t* WMACodecContext::run_table[2]

Definition at line 95 of file wma.h.

◆ level_table

float* WMACodecContext::level_table[2]

Definition at line 96 of file wma.h.

◆ int_table

uint16_t* WMACodecContext::int_table[2]

Definition at line 97 of file wma.h.

◆ coef_vlcs

const CoefVLCTable* WMACodecContext::coef_vlcs[2]

Definition at line 98 of file wma.h.

◆ frame_len

int WMACodecContext::frame_len

frame length in samples

Definition at line 100 of file wma.h.

◆ frame_len_bits

int WMACodecContext::frame_len_bits

frame_len = 1 << frame_len_bits

Definition at line 101 of file wma.h.

◆ nb_block_sizes

int WMACodecContext::nb_block_sizes

number of block sizes

Definition at line 102 of file wma.h.

◆ reset_block_lengths

int WMACodecContext::reset_block_lengths

Definition at line 104 of file wma.h.

◆ block_len_bits

int WMACodecContext::block_len_bits

log2 of current block length

Definition at line 105 of file wma.h.

◆ next_block_len_bits

int WMACodecContext::next_block_len_bits

log2 of next block length

Definition at line 106 of file wma.h.

◆ prev_block_len_bits

int WMACodecContext::prev_block_len_bits

log2 of prev block length

Definition at line 107 of file wma.h.

◆ block_len

int WMACodecContext::block_len

block length in samples

Definition at line 108 of file wma.h.

◆ block_num

int WMACodecContext::block_num

block number in current frame

Definition at line 109 of file wma.h.

◆ block_pos

int WMACodecContext::block_pos

current position in frame

Definition at line 110 of file wma.h.

◆ ms_stereo

uint8_t WMACodecContext::ms_stereo

true if mid/side stereo mode

Definition at line 111 of file wma.h.

◆ channel_coded

uint8_t WMACodecContext::channel_coded[MAX_CHANNELS]

true if channel is coded

Definition at line 112 of file wma.h.

◆ exponents_bsize

int WMACodecContext::exponents_bsize[MAX_CHANNELS]

log2 ratio frame/exp. length

Definition at line 113 of file wma.h.

◆ exponents

float WMACodecContext::exponents[MAX_CHANNELS][BLOCK_MAX_SIZE]

Definition at line 114 of file wma.h.

◆ max_exponent

float WMACodecContext::max_exponent[MAX_CHANNELS]

Definition at line 115 of file wma.h.

◆ coefs1

WMACoef WMACodecContext::coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE]

Definition at line 116 of file wma.h.

◆ coefs

float WMACodecContext::coefs[MAX_CHANNELS][BLOCK_MAX_SIZE]

Definition at line 117 of file wma.h.

◆ output

float WMACodecContext::output[BLOCK_MAX_SIZE *2]

Definition at line 118 of file wma.h.

◆ mdct_ctx

AVTXContext* WMACodecContext::mdct_ctx[BLOCK_NB_SIZES]

Definition at line 119 of file wma.h.

◆ mdct_fn

av_tx_fn WMACodecContext::mdct_fn[BLOCK_NB_SIZES]

Definition at line 120 of file wma.h.

◆ windows

const float* WMACodecContext::windows[BLOCK_NB_SIZES]

Definition at line 121 of file wma.h.

◆ frame_out

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

Definition at line 123 of file wma.h.

◆ last_superframe

uint8_t WMACodecContext::last_superframe[MAX_CODED_SUPERFRAME_SIZE+AV_INPUT_BUFFER_PADDING_SIZE]

Definition at line 125 of file wma.h.

◆ last_bitoffset

int WMACodecContext::last_bitoffset

Definition at line 126 of file wma.h.

◆ last_superframe_len

int WMACodecContext::last_superframe_len

Definition at line 127 of file wma.h.

◆ exponents_initialized

int WMACodecContext::exponents_initialized[MAX_CHANNELS]

Definition at line 128 of file wma.h.

◆ noise_table

float WMACodecContext::noise_table[NOISE_TAB_SIZE]

Definition at line 129 of file wma.h.

◆ noise_index

int WMACodecContext::noise_index

Definition at line 130 of file wma.h.

◆ noise_mult

float WMACodecContext::noise_mult

Definition at line 131 of file wma.h.

◆ lsp_cos_table

float WMACodecContext::lsp_cos_table[BLOCK_MAX_SIZE]

Definition at line 133 of file wma.h.

◆ lsp_pow_e_table

float WMACodecContext::lsp_pow_e_table[256]

Definition at line 134 of file wma.h.

◆ lsp_pow_m_table1

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

Definition at line 135 of file wma.h.

◆ lsp_pow_m_table2

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

Definition at line 136 of file wma.h.

◆ fdsp

AVFloatDSPContext* WMACodecContext::fdsp

Definition at line 137 of file wma.h.

◆ eof_done

int WMACodecContext::eof_done

Definition at line 139 of file wma.h.

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

libavcodec/wma.h

Generated on Sun Sep 6 2026 19:21:29 for FFmpeg by doxygen 1.13.2