FFmpeg: DCAXllChSet Struct Reference

FFmpeg 4.0

#include <libavcodec/dca_xll.h>

Data Fields
int	nchannels
	Number of channels in the channel set (N) More...

int	residual_encode
	Residual encoding mask (0 - residual, 1 - full channel) More...

int	pcm_bit_res
	PCM bit resolution (variable) More...

int	storage_bit_res
	Storage bit resolution (16 or 24) More...

int	freq
	Original sampling frequency (max. 96000 Hz) More...

int	primary_chset
	Primary channel set flag. More...

int	dmix_coeffs_present
	Downmix coefficients present in stream. More...

int	dmix_embedded
	Downmix already performed by encoder. More...

int	dmix_type
	Primary channel set downmix type. More...

int	hier_chset
	Whether the channel set is part of a hierarchy. More...

int	hier_ofs
	Number of preceding channels in a hierarchy (M) More...

int	dmix_coeff [DCA_XLL_DMIX_COEFFS_MAX]
	Downmixing coefficients. More...

int	dmix_scale [DCA_XLL_DMIX_SCALES_MAX]
	Downmixing scales. More...

int	dmix_scale_inv [DCA_XLL_DMIX_SCALES_MAX]
	Inverse downmixing scales. More...

int	ch_mask
	Channel mask for set. More...

int	ch_remap [DCA_XLL_CHANNELS_MAX]
	Channel to speaker map. More...

int	nfreqbands
	Number of frequency bands (1 or 2) More...

int	nabits
	Number of bits to read bit allocation coding parameter. More...

DCAXllBand	bands [DCA_XLL_BANDS_MAX]
	Frequency bands. More...

int	seg_common
	Segment type. More...

int	rice_code_flag [DCA_XLL_CHANNELS_MAX]
	Rice coding flag. More...

int	bitalloc_hybrid_linear [DCA_XLL_CHANNELS_MAX]
	Binary code length for isolated samples. More...

int	bitalloc_part_a [DCA_XLL_CHANNELS_MAX]
	Coding parameter for part A of segment. More...

int	bitalloc_part_b [DCA_XLL_CHANNELS_MAX]
	Coding parameter for part B of segment. More...

int	nsamples_part_a [DCA_XLL_CHANNELS_MAX]
	Number of samples in part A of segment. More...

int32_t	deci_history [DCA_XLL_CHANNELS_MAX][DCA_XLL_DECI_HISTORY_MAX]
	Decimator history for frequency band 1. More...

unsigned int	sample_size [DCA_XLL_SAMPLE_BUFFERS_MAX]

int32_t *	sample_buffer [DCA_XLL_SAMPLE_BUFFERS_MAX]

Detailed Description

Definition at line 64 of file dca_xll.h.

Field Documentation

◆ nchannels

int DCAXllChSet::nchannels

Number of channels in the channel set (N)

Definition at line 66 of file dca_xll.h.

Referenced by chs_alloc_lsb_band_data(), chs_alloc_msb_band_data(), chs_assemble_freq_bands(), chs_assemble_msbs_lsbs(), chs_clear_band_data(), chs_filter_band_data(), chs_parse_band_data(), chs_parse_header(), combine_residual_frame(), force_lossy_output(), parse_dmix_coeffs(), parse_sub_headers(), prescale_down_mix(), scale_down_mix(), and undo_down_mix().

◆ residual_encode

int DCAXllChSet::residual_encode

Residual encoding mask (0 - residual, 1 - full channel)

Definition at line 67 of file dca_xll.h.

Referenced by chs_parse_header(), combine_residual_frame(), force_lossy_output(), and parse_sub_headers().

◆ pcm_bit_res

int DCAXllChSet::pcm_bit_res

PCM bit resolution (variable)

Definition at line 68 of file dca_xll.h.

Referenced by chs_parse_header(), combine_residual_frame(), and ff_dca_xll_filter_frame().

◆ storage_bit_res

int DCAXllChSet::storage_bit_res

Storage bit resolution (16 or 24)

Definition at line 69 of file dca_xll.h.

Referenced by chs_parse_header(), and ff_dca_xll_filter_frame().

◆ freq

int DCAXllChSet::freq

Original sampling frequency (max. 96000 Hz)

Definition at line 70 of file dca_xll.h.

Referenced by chs_parse_header(), combine_residual_frame(), dcadec_decode_frame(), and ff_dca_xll_filter_frame().

◆ primary_chset

int DCAXllChSet::primary_chset

Primary channel set flag.

Definition at line 72 of file dca_xll.h.

Referenced by chs_parse_header(), is_hier_dmix_chset(), and parse_dmix_coeffs().

◆ dmix_coeffs_present

int DCAXllChSet::dmix_coeffs_present

Downmix coefficients present in stream.

Definition at line 73 of file dca_xll.h.

Referenced by chs_parse_header().

◆ dmix_embedded

int DCAXllChSet::dmix_embedded

Downmix already performed by encoder.

Definition at line 74 of file dca_xll.h.

Referenced by chs_parse_header(), ff_dca_xll_filter_frame(), and is_hier_dmix_chset().

◆ dmix_type

int DCAXllChSet::dmix_type

Primary channel set downmix type.

Definition at line 75 of file dca_xll.h.

Referenced by chs_parse_header(), ff_dca_xll_filter_frame(), and parse_dmix_coeffs().

◆ hier_chset

int DCAXllChSet::hier_chset

Whether the channel set is part of a hierarchy.

Definition at line 76 of file dca_xll.h.

Referenced by chs_parse_header(), find_next_hier_dmix_chset(), is_hier_dmix_chset(), parse_sub_headers(), scale_down_mix(), and undo_down_mix().

◆ hier_ofs

int DCAXllChSet::hier_ofs

Number of preceding channels in a hierarchy (M)

Definition at line 77 of file dca_xll.h.

Referenced by combine_residual_frame(), parse_dmix_coeffs(), parse_sub_headers(), prescale_down_mix(), scale_down_mix(), and undo_down_mix().

◆ dmix_coeff

int DCAXllChSet::dmix_coeff[DCA_XLL_DMIX_COEFFS_MAX]

Downmixing coefficients.

Definition at line 78 of file dca_xll.h.

Referenced by ff_dca_xll_filter_frame(), parse_dmix_coeffs(), prescale_down_mix(), and undo_down_mix().

◆ dmix_scale

int DCAXllChSet::dmix_scale[DCA_XLL_DMIX_SCALES_MAX]

Downmixing scales.

Definition at line 79 of file dca_xll.h.

Referenced by parse_dmix_coeffs(), prescale_down_mix(), and scale_down_mix().

◆ dmix_scale_inv

int DCAXllChSet::dmix_scale_inv[DCA_XLL_DMIX_SCALES_MAX]

Inverse downmixing scales.

Definition at line 80 of file dca_xll.h.

Referenced by combine_residual_frame(), parse_dmix_coeffs(), and prescale_down_mix().

◆ ch_mask

int DCAXllChSet::ch_mask

Channel mask for set.

Definition at line 81 of file dca_xll.h.

Referenced by chs_parse_header().

◆ ch_remap

int DCAXllChSet::ch_remap[DCA_XLL_CHANNELS_MAX]

Channel to speaker map.

Definition at line 82 of file dca_xll.h.

Referenced by chs_assemble_freq_bands(), chs_filter_band_data(), chs_parse_header(), combine_residual_frame(), and force_lossy_output().

◆ nfreqbands

int DCAXllChSet::nfreqbands

Number of frequency bands (1 or 2)

Definition at line 84 of file dca_xll.h.

Referenced by chs_alloc_lsb_band_data(), chs_alloc_msb_band_data(), chs_assemble_freq_bands(), chs_filter_band_data(), chs_parse_header(), force_lossy_output(), parse_band_data(), parse_navi_table(), and parse_sub_headers().

◆ nabits

int DCAXllChSet::nabits

Number of bits to read bit allocation coding parameter.

Definition at line 85 of file dca_xll.h.

Referenced by chs_parse_band_data(), and chs_parse_header().

◆ bands

DCAXllBand DCAXllChSet::bands[DCA_XLL_BANDS_MAX]

Frequency bands.

Definition at line 87 of file dca_xll.h.

Referenced by chs_alloc_lsb_band_data(), chs_alloc_msb_band_data(), chs_assemble_freq_bands(), chs_assemble_msbs_lsbs(), chs_clear_band_data(), chs_filter_band_data(), chs_get_lsb_width(), chs_parse_band_data(), chs_parse_header(), combine_residual_frame(), scale_down_mix(), and undo_down_mix().

◆ seg_common

int DCAXllChSet::seg_common

Definition at line 90 of file dca_xll.h.

Referenced by chs_parse_band_data().

◆ rice_code_flag

int DCAXllChSet::rice_code_flag[DCA_XLL_CHANNELS_MAX]

Rice coding flag.

Definition at line 91 of file dca_xll.h.

Referenced by chs_parse_band_data().

◆ bitalloc_hybrid_linear

int DCAXllChSet::bitalloc_hybrid_linear[DCA_XLL_CHANNELS_MAX]

Binary code length for isolated samples.

Definition at line 92 of file dca_xll.h.

Referenced by chs_parse_band_data().

◆ bitalloc_part_a

int DCAXllChSet::bitalloc_part_a[DCA_XLL_CHANNELS_MAX]

Coding parameter for part A of segment.

Definition at line 93 of file dca_xll.h.

Referenced by chs_parse_band_data().

◆ bitalloc_part_b

int DCAXllChSet::bitalloc_part_b[DCA_XLL_CHANNELS_MAX]

Coding parameter for part B of segment.

Definition at line 94 of file dca_xll.h.

Referenced by chs_parse_band_data().

◆ nsamples_part_a

int DCAXllChSet::nsamples_part_a[DCA_XLL_CHANNELS_MAX]

Number of samples in part A of segment.

Definition at line 95 of file dca_xll.h.

Referenced by chs_parse_band_data().

◆ deci_history

int32_t DCAXllChSet::deci_history[DCA_XLL_CHANNELS_MAX][DCA_XLL_DECI_HISTORY_MAX]

Decimator history for frequency band 1.

Definition at line 98 of file dca_xll.h.

Referenced by chs_assemble_freq_bands(), chs_clear_band_data(), chs_parse_band_data(), scale_down_mix(), and undo_down_mix().

◆ sample_size

unsigned int DCAXllChSet::sample_size[DCA_XLL_SAMPLE_BUFFERS_MAX]

Definition at line 101 of file dca_xll.h.

Referenced by chs_alloc_lsb_band_data(), chs_alloc_msb_band_data(), chs_assemble_freq_bands(), and ff_dca_xll_close().

◆ sample_buffer

int32_t* DCAXllChSet::sample_buffer[DCA_XLL_SAMPLE_BUFFERS_MAX]

Definition at line 102 of file dca_xll.h.

Referenced by chs_alloc_lsb_band_data(), chs_alloc_msb_band_data(), chs_assemble_freq_bands(), and ff_dca_xll_close().

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

libavcodec/dca_xll.h