DCAContext Struct Reference

Public Member Functions
	DECLARE_ALIGNED_16 (float, samples[1536])
	DECLARE_ALIGNED_16 (int16_t, tsamples[1536])
Data Fields
AVCodecContext *	avctx
int	frame_type
	type of the current frame
int	samples_deficit
	deficit sample count
int	crc_present
	crc is present in the bitstream
int	sample_blocks
	number of PCM sample blocks
int	frame_size
	primary frame byte size
int	amode
	audio channels arrangement
int	sample_rate
	audio sampling rate
int	bit_rate
	transmission bit rate
int	downmix
	embedded downmix enabled
int	dynrange
	embedded dynamic range flag
int	timestamp
	embedded time stamp flag
int	aux_data
	auxiliary data flag
int	hdcd
	source material is mastered in HDCD
int	ext_descr
	extension audio descriptor flag
int	ext_coding
	extended coding flag
int	aspf
	audio sync word insertion flag
int	lfe
	low frequency effects flag
int	predictor_history
	predictor history flag
int	header_crc
	header crc check bytes
int	multirate_inter
	multirate interpolator switch
int	version
	encoder software revision
int	copy_history
	copy history
int	source_pcm_res
	source pcm resolution
int	front_sum
	front sum/difference flag
int	surround_sum
	surround sum/difference flag
int	dialog_norm
	dialog normalisation parameter
int	subframes
	number of subframes
int	prim_channels
	number of primary audio channels
int	subband_activity [DCA_PRIM_CHANNELS_MAX]
	subband activity count
int	vq_start_subband [DCA_PRIM_CHANNELS_MAX]
	high frequency vq start subband
int	joint_intensity [DCA_PRIM_CHANNELS_MAX]
	joint intensity coding index
int	transient_huffman [DCA_PRIM_CHANNELS_MAX]
	transient mode code book
int	scalefactor_huffman [DCA_PRIM_CHANNELS_MAX]
	scale factor code book
int	bitalloc_huffman [DCA_PRIM_CHANNELS_MAX]
	bit allocation quantizer select
int	quant_index_huffman [DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]
	quantization index codebook select
float	scalefactor_adj [DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]
	scale factor adjustment
int	subsubframes
	number of subsubframes
int	partial_samples
	partial subsubframe samples count
int	prediction_mode [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]
	prediction mode (ADPCM used or not)
int	prediction_vq [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]
	prediction VQ coefs
int	bitalloc [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]
	bit allocation index
int	transition_mode [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]
	transition mode (transients)
int	scale_factor [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2]
	scale factors (2 if transient)
int	joint_huff [DCA_PRIM_CHANNELS_MAX]
	joint subband scale factors codebook
int	joint_scale_factor [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]
	joint subband scale factors
int	downmix_coef [DCA_PRIM_CHANNELS_MAX][2]
	stereo downmix coefficients
int	dynrange_coef
	dynamic range coefficient
int	high_freq_vq [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]
	VQ encoded high frequency subbands.
float	lfe_data [2 *DCA_SUBSUBFAMES_MAX *DCA_LFE_MAX *2]
	Low frequency effect data.
int	lfe_scale_factor
float	subband_samples_hist [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4]
float	subband_fir_hist [DCA_PRIM_CHANNELS_MAX][512]
float	subband_fir_noidea [DCA_PRIM_CHANNELS_MAX][64]
int	output
	type of output
int	bias
	output bias
uint8_t	dca_buffer [DCA_MAX_FRAME_SIZE]
int	dca_buffer_size
	how much data is in the dca_buffer
GetBitContext	gb
int	current_subframe
int	current_subsubframe
int	debug_flag
	used for suppressing repeated error messages output
DSPContext	dsp

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Detailed Description

Definition at line 95 of file dca.c.

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Member Function Documentation

DCAContext::DECLARE_ALIGNED_16	(	float	,
		samples	[1536]
	)

DCAContext::DECLARE_ALIGNED_16	(	int16_t	,
		tsamples	[1536]
	)

---

Field Documentation

AVCodecContext* DCAContext::avctx

Definition at line 96 of file dca.c.

Referenced by dca_decode_block(), dca_decode_init(), dca_parse_frame_header(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::frame_type

type of the current frame

Definition at line 98 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::samples_deficit

deficit sample count

Definition at line 99 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::crc_present

crc is present in the bitstream

Definition at line 100 of file dca.c.

Referenced by dca_parse_frame_header(), dca_subframe_footer(), and dca_subframe_header().

int DCAContext::sample_blocks

number of PCM sample blocks

Definition at line 101 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

int DCAContext::frame_size

primary frame byte size

Definition at line 102 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::amode

audio channels arrangement

Definition at line 103 of file dca.c.

Referenced by dca_parse_frame_header(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::sample_rate

audio sampling rate

Definition at line 104 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

int DCAContext::bit_rate

transmission bit rate

Definition at line 105 of file dca.c.

Referenced by dca_decode_frame(), dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::downmix

embedded downmix enabled

Definition at line 107 of file dca.c.

Referenced by dca_parse_frame_header(), dca_subframe_footer(), and dca_subframe_header().

int DCAContext::dynrange

embedded dynamic range flag

Definition at line 108 of file dca.c.

Referenced by dca_parse_frame_header(), dca_subframe_footer(), and dca_subframe_header().

int DCAContext::timestamp

embedded time stamp flag

Definition at line 109 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_footer().

int DCAContext::aux_data

auxiliary data flag

Definition at line 110 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_footer().

int DCAContext::hdcd

source material is mastered in HDCD

Definition at line 111 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::ext_descr

extension audio descriptor flag

Definition at line 112 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::ext_coding

extended coding flag

Definition at line 113 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::aspf

audio sync word insertion flag

Definition at line 114 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::lfe

low frequency effects flag

Definition at line 115 of file dca.c.

Referenced by dca_decode_frame(), dca_parse_frame_header(), dca_subframe_footer(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::predictor_history

predictor history flag

Definition at line 116 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::header_crc

header crc check bytes

Definition at line 117 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::multirate_inter

multirate interpolator switch

Definition at line 118 of file dca.c.

Referenced by dca_parse_frame_header(), and qmf_32_subbands().

int DCAContext::version

encoder software revision

Definition at line 119 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::copy_history

copy history

Definition at line 120 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::source_pcm_res

source pcm resolution

Definition at line 121 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::front_sum

front sum/difference flag

Definition at line 122 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::surround_sum

surround sum/difference flag

Definition at line 123 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::dialog_norm

dialog normalisation parameter

Definition at line 124 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::subframes

number of subframes

Definition at line 127 of file dca.c.

Referenced by dca_decode_block(), and dca_parse_frame_header().

int DCAContext::prim_channels

number of primary audio channels

Definition at line 128 of file dca.c.

Referenced by dca_decode_frame(), dca_parse_frame_header(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::subband_activity[DCA_PRIM_CHANNELS_MAX]

subband activity count

Definition at line 129 of file dca.c.

Referenced by dca_parse_frame_header(), dca_subframe_header(), and qmf_32_subbands().

int DCAContext::vq_start_subband[DCA_PRIM_CHANNELS_MAX]

high frequency vq start subband

Definition at line 130 of file dca.c.

Referenced by dca_parse_frame_header(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::joint_intensity[DCA_PRIM_CHANNELS_MAX]

joint intensity coding index

Definition at line 131 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

int DCAContext::transient_huffman[DCA_PRIM_CHANNELS_MAX]

transient mode code book

Definition at line 132 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

int DCAContext::scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]

scale factor code book

Definition at line 133 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

int DCAContext::bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]

bit allocation quantizer select

Definition at line 134 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

int DCAContext::quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]

quantization index codebook select

Definition at line 135 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

float DCAContext::scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]

scale factor adjustment

Definition at line 136 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::subsubframes

number of subsubframes

Definition at line 139 of file dca.c.

Referenced by dca_decode_block(), dca_subframe_footer(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::partial_samples

partial subsubframe samples count

Definition at line 140 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::prediction_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

prediction mode (ADPCM used or not)

Definition at line 141 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::prediction_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

prediction VQ coefs

Definition at line 142 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

bit allocation index

Definition at line 143 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

transition mode (transients)

Definition at line 144 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2]

scale factors (2 if transient)

Definition at line 145 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::joint_huff[DCA_PRIM_CHANNELS_MAX]

joint subband scale factors codebook

Definition at line 146 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

joint subband scale factors

Definition at line 147 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::downmix_coef[DCA_PRIM_CHANNELS_MAX][2]

stereo downmix coefficients

Definition at line 148 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::dynrange_coef

dynamic range coefficient

Definition at line 149 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

VQ encoded high frequency subbands.

Definition at line 151 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

float DCAContext::lfe_data[2 *DCA_SUBSUBFAMES_MAX *DCA_LFE_MAX *2]

Low frequency effect data.

Definition at line 154 of file dca.c.

Referenced by dca_subframe_footer(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::lfe_scale_factor

Definition at line 155 of file dca.c.

Referenced by dca_subframe_header().

float DCAContext::subband_samples_hist[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4]

Definition at line 158 of file dca.c.

Referenced by dca_subsubframe().

float DCAContext::subband_fir_hist[DCA_PRIM_CHANNELS_MAX][512]

Definition at line 159 of file dca.c.

Referenced by qmf_32_subbands().

float DCAContext::subband_fir_noidea[DCA_PRIM_CHANNELS_MAX][64]

Definition at line 160 of file dca.c.

Referenced by qmf_32_subbands().

int DCAContext::output

type of output

Definition at line 162 of file dca.c.

Referenced by dca_decode_frame(), dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::bias

output bias

Definition at line 163 of file dca.c.

Referenced by dca_parse_frame_header().

uint8_t DCAContext::dca_buffer[DCA_MAX_FRAME_SIZE]

Definition at line 168 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

int DCAContext::dca_buffer_size

how much data is in the dca_buffer

Definition at line 169 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

GetBitContext DCAContext::gb

Definition at line 171 of file dca.c.

Referenced by dca_decode_frame(), dca_parse_frame_header(), dca_subframe_footer(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::current_subframe

Definition at line 173 of file dca.c.

Referenced by dca_decode_block(), and dca_parse_frame_header().

int DCAContext::current_subsubframe

Definition at line 174 of file dca.c.

Referenced by dca_decode_block(), dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::debug_flag

used for suppressing repeated error messages output

Definition at line 176 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

DSPContext DCAContext::dsp

Definition at line 177 of file dca.c.

Referenced by dca_decode_frame(), and dca_decode_init().

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

• libavcodec/dca.c