FFmpeg: DCALbrDecoder Struct Reference

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Data Fields

DCALbrDecoder Struct Reference

#include <dca_lbr.h>

Data Fields

AVCodecContext * avctx

GetBitContext gb

int sample_rate

Sample rate of LBR audio. More...

int ch_mask

LBR speaker mask. More...

int flags

Flags for LBR decoder initialization. More...

int bit_rate_orig

Original bit rate. More...

int bit_rate_scaled

Scaled bit rate. More...

int nchannels

Number of fullband channels to decode. More...

int nchannels_total

Total number of fullband channels. More...

int freq_range

Frequency range of LBR audio. More...

int band_limit

Band limit factor. More...

int limited_rate

Band limited sample rate. More...

int limited_range

Band limited frequency range. More...

int res_profile

Resolution profile. More...

int nsubbands

Number of encoded subbands. More...

int g3_avg_only_start_sb

Subband index where grid 3 scale factors end. More...

int min_mono_subband

Subband index where mono encoding starts. More...

int max_mono_subband

Subband index where mono encoding ends. More...

int framenum

Lower 5 bits of current frame number. More...

int lbr_rand

Seed for subband randomization. More...

int warned

Flags for warning suppression. More...

uint8_t quant_levels [DCA_LBR_CHANNELS/2][DCA_LBR_SUBBANDS]

Quantization levels. More...

uint8_t sb_indices [DCA_LBR_SUBBANDS]

Subband reordering indices. More...

uint8_t sec_ch_sbms [DCA_LBR_CHANNELS/2][DCA_LBR_SUBBANDS]

Right channel inversion or mid/side decoding flags. More...

uint8_t sec_ch_lrms [DCA_LBR_CHANNELS/2][DCA_LBR_SUBBANDS]

Flags indicating if left/right channel are swapped. More...

uint32_t ch_pres [DCA_LBR_CHANNELS]

Subband allocation flags. More...

uint8_t grid_1_scf [DCA_LBR_CHANNELS][12][8]

Grid 1 scale factors. More...

uint8_t grid_2_scf [DCA_LBR_CHANNELS][3][64]

Grid 2 scale factors. More...

int8_t grid_3_avg [DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS-4]

Grid 3 average values. More...

int8_t grid_3_scf [DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS-4][8]

Grid 3 scale factors. More...

uint32_t grid_3_pres [DCA_LBR_CHANNELS]

Grid 3 scale factors presence flags. More...

uint8_t high_res_scf [DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS][8]

High-frequency resolution scale factors. More...

uint8_t part_stereo [DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS/4][5]

Partial stereo coefficients. More...

uint8_t part_stereo_pres

Partial stereo coefficients presence flags. More...

float lpc_coeff [2][DCA_LBR_CHANNELS][3][2][8]

Predictor coefficients. More...

float sb_scf [DCA_LBR_SUBBANDS]

Subband randomization scale factors. More...

float * time_samples [DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS]

Time samples. More...

float * ts_buffer

Time sample buffer base. More...

unsigned int ts_size

Time sample buffer size. More...

float history [DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS *4]

IMDCT history. More...

float window [DCA_LBR_SUBBANDS *4]

Long window for IMDCT. More...

float lfe_data [64]

Decimated LFE samples. More...

float lfe_history [5][2]

LFE IIR filter history. More...

float lfe_scale

Scale factor of LFE samples before IIR filter. More...

uint8_t tonal_scf [6]

Tonal scale factors. More...

uint16_t tonal_bounds [5][32][2]

Per-group per-subframe start/end positions of tones. More...

DCALbrTone tones [DCA_LBR_TONES]

Circular buffer of tones. More...

int ntones

Circular buffer head position. More...

FFTContext imdct

AVFloatDSPContext * fdsp

DCADSPContext * dcadsp

Detailed Description

Definition at line 58 of file dca_lbr.h.

Field Documentation

AVCodecContext* DCALbrDecoder::avctx

Definition at line 59 of file dca_lbr.h.

Referenced by dcadec_init(), ff_dca_lbr_filter_frame(), ff_dca_lbr_parse(), parse_decoder_init(), parse_grid_1_chunk(), parse_lfe_16(), parse_lfe_24(), parse_lfe_chunk(), parse_scale_factors(), parse_tonal(), and parse_tonal_chunk().

GetBitContext DCALbrDecoder::gb

Definition at line 60 of file dca_lbr.h.

Referenced by parse_ch(), parse_grid_1_chunk(), parse_grid_1_sec_ch(), parse_grid_2(), parse_grid_3(), parse_high_res_grid(), parse_lfe_16(), parse_lfe_24(), parse_lfe_chunk(), parse_lpc(), parse_scale_factors(), parse_tonal(), parse_tonal_chunk(), parse_tonal_group(), parse_ts(), parse_ts1_chunk(), and parse_ts2_chunk().

int DCALbrDecoder::sample_rate

Sample rate of LBR audio.

Definition at line 62 of file dca_lbr.h.

Referenced by ff_dca_lbr_close(), ff_dca_lbr_filter_frame(), ff_dca_lbr_flush(), ff_dca_lbr_parse(), and parse_decoder_init().

int DCALbrDecoder::ch_mask

LBR speaker mask.

Definition at line 63 of file dca_lbr.h.

Referenced by ff_dca_lbr_filter_frame(), and parse_decoder_init().

int DCALbrDecoder::flags

Flags for LBR decoder initialization.

Definition at line 64 of file dca_lbr.h.

Referenced by ff_dca_lbr_filter_frame(), parse_decoder_init(), and parse_lfe_chunk().

int DCALbrDecoder::bit_rate_orig

Original bit rate.

Definition at line 65 of file dca_lbr.h.

Referenced by parse_decoder_init().

int DCALbrDecoder::bit_rate_scaled

Scaled bit rate.

Definition at line 66 of file dca_lbr.h.

Referenced by ff_dca_lbr_filter_frame(), init_sample_rate(), and parse_decoder_init().

int DCALbrDecoder::nchannels

Number of fullband channels to decode.

Definition at line 68 of file dca_lbr.h.

Referenced by alloc_sample_buffer(), ff_dca_lbr_filter_frame(), ff_dca_lbr_flush(), ff_dca_lbr_parse(), parse_decoder_init(), and parse_tonal().

int DCALbrDecoder::nchannels_total

Total number of fullband channels.

Definition at line 69 of file dca_lbr.h.

Referenced by init_sample_rate(), parse_decoder_init(), and parse_tonal().

int DCALbrDecoder::freq_range

Frequency range of LBR audio.

Definition at line 70 of file dca_lbr.h.

Referenced by ff_dca_lbr_filter_frame(), init_sample_rate(), parse_decoder_init(), and transform_channel().

int DCALbrDecoder::band_limit

Band limit factor.

Definition at line 71 of file dca_lbr.h.

Referenced by parse_decoder_init().

int DCALbrDecoder::limited_rate

Band limited sample rate.

Definition at line 72 of file dca_lbr.h.

Referenced by parse_decoder_init(), and parse_high_res_grid().

int DCALbrDecoder::limited_range

Band limited frequency range.

Definition at line 73 of file dca_lbr.h.

Referenced by init_sample_rate(), parse_decoder_init(), parse_tonal(), and parse_ts().

int DCALbrDecoder::res_profile

Resolution profile.

Definition at line 74 of file dca_lbr.h.

Referenced by parse_decoder_init().

int DCALbrDecoder::nsubbands

Number of encoded subbands.

Definition at line 75 of file dca_lbr.h.

Referenced by alloc_sample_buffer(), decode_grid(), ff_dca_lbr_flush(), ff_dca_lbr_parse(), filter_ts(), init_sample_rate(), parse_decoder_init(), parse_grid_1_chunk(), parse_grid_1_sec_ch(), parse_grid_2(), parse_high_res_grid(), parse_tonal(), parse_ts(), parse_ts2_chunk(), random_ts(), and transform_channel().

int DCALbrDecoder::g3_avg_only_start_sb

Subband index where grid 3 scale factors end.

Definition at line 76 of file dca_lbr.h.

Referenced by parse_decoder_init(), and parse_ts().

int DCALbrDecoder::min_mono_subband

Subband index where mono encoding starts.

Definition at line 77 of file dca_lbr.h.

Referenced by decode_part_stereo(), filter_ts(), parse_decoder_init(), parse_grid_1_chunk(), parse_grid_1_sec_ch(), parse_grid_2(), parse_grid_3(), parse_ts(), and parse_ts2_chunk().

int DCALbrDecoder::max_mono_subband

Subband index where mono encoding ends.

Definition at line 78 of file dca_lbr.h.

Referenced by parse_decoder_init(), parse_ts(), and parse_ts2_chunk().

int DCALbrDecoder::framenum

Lower 5 bits of current frame number.

Definition at line 80 of file dca_lbr.h.

Referenced by base_func_synth(), ff_dca_lbr_flush(), ff_dca_lbr_parse(), parse_lpc(), parse_tonal(), and synth_lpc().

int DCALbrDecoder::lbr_rand

Seed for subband randomization.

Definition at line 81 of file dca_lbr.h.

Referenced by ff_dca_lbr_init(), and lbr_rand().

int DCALbrDecoder::warned

Flags for warning suppression.

Definition at line 82 of file dca_lbr.h.

Referenced by parse_decoder_init().

uint8_t DCALbrDecoder::quant_levels[DCA_LBR_CHANNELS/2][DCA_LBR_SUBBANDS]

Quantization levels.

Definition at line 84 of file dca_lbr.h.

Referenced by ff_dca_lbr_parse(), parse_high_res_grid(), and parse_ts().

uint8_t DCALbrDecoder::sb_indices[DCA_LBR_SUBBANDS]

Subband reordering indices.

Definition at line 85 of file dca_lbr.h.

Referenced by ff_dca_lbr_parse(), and parse_ts().

uint8_t DCALbrDecoder::sec_ch_sbms[DCA_LBR_CHANNELS/2][DCA_LBR_SUBBANDS]

Right channel inversion or mid/side decoding flags.

Definition at line 87 of file dca_lbr.h.

Referenced by ff_dca_lbr_parse(), filter_ts(), and parse_ts().

uint8_t DCALbrDecoder::sec_ch_lrms[DCA_LBR_CHANNELS/2][DCA_LBR_SUBBANDS]

Flags indicating if left/right channel are swapped.

Definition at line 88 of file dca_lbr.h.

Referenced by ff_dca_lbr_parse(), filter_ts(), and parse_ts().

uint32_t DCALbrDecoder::ch_pres[DCA_LBR_CHANNELS]

Subband allocation flags.

Definition at line 89 of file dca_lbr.h.

Referenced by decode_part_stereo(), ff_dca_lbr_parse(), filter_ts(), parse_ch(), random_ts(), and synth_lpc().

uint8_t DCALbrDecoder::grid_1_scf[DCA_LBR_CHANNELS][12][8]

Grid 1 scale factors.

Definition at line 91 of file dca_lbr.h.

Referenced by decode_grid(), ff_dca_lbr_parse(), parse_grid_1_chunk(), parse_grid_1_sec_ch(), and parse_high_res_grid().

uint8_t DCALbrDecoder::grid_2_scf[DCA_LBR_CHANNELS][3][64]

Grid 2 scale factors.

Definition at line 92 of file dca_lbr.h.

Referenced by ff_dca_lbr_parse(), filter_ts(), and parse_grid_2().

int8_t DCALbrDecoder::grid_3_avg[DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS-4]

Grid 3 average values.

Definition at line 94 of file dca_lbr.h.

Referenced by decode_grid(), ff_dca_lbr_parse(), parse_grid_1_chunk(), and parse_grid_1_sec_ch().

int8_t DCALbrDecoder::grid_3_scf[DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS-4][8]

Grid 3 scale factors.

Definition at line 95 of file dca_lbr.h.

Referenced by decode_grid(), ff_dca_lbr_parse(), and parse_grid_3().

uint32_t DCALbrDecoder::grid_3_pres[DCA_LBR_CHANNELS]

Grid 3 scale factors presence flags.

Definition at line 96 of file dca_lbr.h.

Referenced by ff_dca_lbr_parse(), and parse_grid_3().

uint8_t DCALbrDecoder::high_res_scf[DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS][8]

High-frequency resolution scale factors.

Definition at line 98 of file dca_lbr.h.

Referenced by decode_grid(), and filter_ts().

uint8_t DCALbrDecoder::part_stereo[DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS/4][5]

Partial stereo coefficients.

Definition at line 100 of file dca_lbr.h.

Referenced by decode_part_stereo(), ff_dca_lbr_flush(), ff_dca_lbr_parse(), and parse_grid_1_chunk().

uint8_t DCALbrDecoder::part_stereo_pres

Partial stereo coefficients presence flags.

Definition at line 101 of file dca_lbr.h.

Referenced by ff_dca_lbr_filter_frame(), ff_dca_lbr_parse(), filter_ts(), and parse_grid_1_chunk().

float DCALbrDecoder::lpc_coeff[2][DCA_LBR_CHANNELS][3][2][8]

Predictor coefficients.

Definition at line 103 of file dca_lbr.h.

Referenced by ff_dca_lbr_flush(), ff_dca_lbr_parse(), parse_lpc(), and synth_lpc().

float DCALbrDecoder::sb_scf[DCA_LBR_SUBBANDS]

Subband randomization scale factors.

Definition at line 105 of file dca_lbr.h.

Referenced by init_sample_rate(), and lbr_rand().

float* DCALbrDecoder::time_samples[DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS]

Time samples.

Definition at line 107 of file dca_lbr.h.

Referenced by alloc_sample_buffer(), decode_part_stereo(), ff_dca_lbr_flush(), filter_ts(), parse_ch(), random_ts(), synth_lpc(), and transform_channel().

float* DCALbrDecoder::ts_buffer

Time sample buffer base.

Definition at line 109 of file dca_lbr.h.

Referenced by alloc_sample_buffer(), and ff_dca_lbr_close().

unsigned int DCALbrDecoder::ts_size

Time sample buffer size.

Definition at line 110 of file dca_lbr.h.

Referenced by alloc_sample_buffer(), and ff_dca_lbr_close().

float DCALbrDecoder::history[DCA_LBR_CHANNELS][DCA_LBR_SUBBANDS *4]

IMDCT history.

Definition at line 112 of file dca_lbr.h.

Referenced by ff_dca_lbr_flush(), and transform_channel().

float DCALbrDecoder::window[DCA_LBR_SUBBANDS *4]

Long window for IMDCT.

Definition at line 113 of file dca_lbr.h.

Referenced by init_sample_rate(), and transform_channel().

float DCALbrDecoder::lfe_data[64]

Decimated LFE samples.

Definition at line 115 of file dca_lbr.h.

Referenced by ff_dca_lbr_filter_frame(), ff_dca_lbr_parse(), parse_lfe_16(), and parse_lfe_24().

float DCALbrDecoder::lfe_history[5][2]

LFE IIR filter history.

Definition at line 116 of file dca_lbr.h.

Referenced by ff_dca_lbr_filter_frame(), and ff_dca_lbr_flush().

float DCALbrDecoder::lfe_scale

Scale factor of LFE samples before IIR filter.

Definition at line 117 of file dca_lbr.h.

Referenced by init_sample_rate(), parse_lfe_16(), and parse_lfe_24().

uint8_t DCALbrDecoder::tonal_scf[6]

Tonal scale factors.

Definition at line 119 of file dca_lbr.h.

Referenced by ff_dca_lbr_parse(), parse_tonal(), and parse_tonal_chunk().

uint16_t DCALbrDecoder::tonal_bounds[5][32][2]

Per-group per-subframe start/end positions of tones.

Definition at line 120 of file dca_lbr.h.

Referenced by ff_dca_lbr_flush(), ff_dca_lbr_parse(), parse_tonal(), and synth_tones().

DCALbrTone DCALbrDecoder::tones[DCA_LBR_TONES]

Circular buffer of tones.

Definition at line 121 of file dca_lbr.h.

Referenced by parse_tonal(), and synth_tones().

int DCALbrDecoder::ntones

Circular buffer head position.

Definition at line 122 of file dca_lbr.h.

Referenced by ff_dca_lbr_flush(), ff_dca_lbr_parse(), and parse_tonal().

FFTContext DCALbrDecoder::imdct

Definition at line 124 of file dca_lbr.h.

Referenced by ff_dca_lbr_close(), init_sample_rate(), and transform_channel().

AVFloatDSPContext* DCALbrDecoder::fdsp

Definition at line 125 of file dca_lbr.h.

Referenced by ff_dca_lbr_close(), ff_dca_lbr_init(), and transform_channel().

DCADSPContext* DCALbrDecoder::dcadsp

Definition at line 126 of file dca_lbr.h.

Referenced by dcadec_init(), ff_dca_lbr_filter_frame(), and transform_channel().

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

libavcodec/dca_lbr.h

Generated on Fri Jan 12 2018 01:48:31 for FFmpeg by doxygen 1.8.6