DCAContext Struct Reference

Public Member Functions
	DECLARE_ALIGNED_16 (float, subband_fir_hist[DCA_PRIM_CHANNELS_MAX][512])
	DECLARE_ALIGNED_16 (float, samples[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	bit_rate_index
	transmission bit rate index
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	total_channels
	number of channels including extensions
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_noidea [DCA_PRIM_CHANNELS_MAX][32]
int	hist_index [DCA_PRIM_CHANNELS_MAX]
int	output
	type of output
float	add_bias
	output bias
float	scale_bias
	output scale
const float *	samples_chanptr [6]
uint8_t	dca_buffer [DCA_MAX_FRAME_SIZE]
int	dca_buffer_size
	how much data is in the dca_buffer
const int8_t *	channel_order_tab
	channel reordering table, lfe and non lfe
GetBitContext	gb
int	current_subframe
int	current_subsubframe
int	debug_flag
	used for suppressing repeated error messages output
DSPContext	dsp
MDCTContext	imdct

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Detailed Description

Definition at line 163 of file dca.c.

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Member Function Documentation

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

DCAContext::DECLARE_ALIGNED_16	(	float	,
		subband_fir_hist	[DCA_PRIM_CHANNELS_MAX][512]
	)

---

Field Documentation

float DCAContext::add_bias

output bias

Definition at line 234 of file dca.c.

Referenced by dca_decode_init(), and dca_subsubframe().

int DCAContext::amode

audio channels arrangement

Definition at line 171 of file dca.c.

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

int DCAContext::aspf

audio sync word insertion flag

Definition at line 183 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::aux_data

auxiliary data flag

Definition at line 179 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_footer().

AVCodecContext* DCAContext::avctx

Definition at line 164 of file dca.c.

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

int DCAContext::bit_rate

transmission bit rate

Definition at line 173 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

int DCAContext::bit_rate_index

transmission bit rate index

Definition at line 174 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

bit allocation index

Definition at line 213 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]

bit allocation quantizer select

Definition at line 204 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

const int8_t* DCAContext::channel_order_tab

channel reordering table, lfe and non lfe

Definition at line 243 of file dca.c.

Referenced by dca_decode_frame(), and dca_subsubframe().

int DCAContext::copy_history

copy history

Definition at line 189 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::crc_present

crc is present in the bitstream

Definition at line 168 of file dca.c.

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

int DCAContext::current_subframe

Definition at line 246 of file dca.c.

Referenced by dca_decode_block(), and dca_parse_frame_header().

int DCAContext::current_subsubframe

Definition at line 247 of file dca.c.

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

uint8_t DCAContext::dca_buffer[DCA_MAX_FRAME_SIZE]

Definition at line 240 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 241 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

int DCAContext::debug_flag

used for suppressing repeated error messages output

Definition at line 249 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::dialog_norm

dialog normalisation parameter

Definition at line 193 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::downmix

embedded downmix enabled

Definition at line 176 of file dca.c.

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

int DCAContext::downmix_coef[DCA_PRIM_CHANNELS_MAX][2]

stereo downmix coefficients

Definition at line 218 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

DSPContext DCAContext::dsp

Definition at line 250 of file dca.c.

Referenced by dca_decode_frame(), and dca_decode_init().

int DCAContext::dynrange

embedded dynamic range flag

Definition at line 177 of file dca.c.

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

int DCAContext::dynrange_coef

dynamic range coefficient

Definition at line 219 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::ext_coding

extended coding flag

Definition at line 182 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::ext_descr

extension audio descriptor flag

Definition at line 181 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::frame_size

primary frame byte size

Definition at line 170 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::frame_type

type of the current frame

Definition at line 166 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::front_sum

front sum/difference flag

Definition at line 191 of file dca.c.

Referenced by dca_parse_frame_header().

GetBitContext DCAContext::gb

Definition at line 244 of file dca.c.

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

int DCAContext::hdcd

source material is mastered in HDCD

Definition at line 180 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::header_crc

header crc check bytes

Definition at line 186 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

VQ encoded high frequency subbands.

Definition at line 221 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::hist_index[DCA_PRIM_CHANNELS_MAX]

Definition at line 231 of file dca.c.

Referenced by qmf_32_subbands().

MDCTContext DCAContext::imdct

Definition at line 251 of file dca.c.

Referenced by dca_decode_end(), dca_decode_init(), and qmf_32_subbands().

int DCAContext::joint_huff[DCA_PRIM_CHANNELS_MAX]

joint subband scale factors codebook

Definition at line 216 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::joint_intensity[DCA_PRIM_CHANNELS_MAX]

joint intensity coding index

Definition at line 201 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

int DCAContext::joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

joint subband scale factors

Definition at line 217 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::lfe

low frequency effects flag

Definition at line 184 of file dca.c.

Referenced by dca_decode_frame(), dca_parse_frame_header(), dca_subframe_footer(), 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 224 of file dca.c.

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

int DCAContext::lfe_scale_factor

Definition at line 225 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::multirate_inter

multirate interpolator switch

Definition at line 187 of file dca.c.

Referenced by dca_parse_frame_header(), and qmf_32_subbands().

int DCAContext::output

type of output

Definition at line 233 of file dca.c.

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

int DCAContext::partial_samples

partial subsubframe samples count

Definition at line 210 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 211 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 212 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::predictor_history

predictor history flag

Definition at line 185 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::prim_channels

number of primary audio channels

Definition at line 198 of file dca.c.

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

int DCAContext::quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]

quantization index codebook select

Definition at line 205 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::sample_blocks

number of PCM sample blocks

Definition at line 169 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

int DCAContext::sample_rate

audio sampling rate

Definition at line 172 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

const float* DCAContext::samples_chanptr[6]

Definition at line 238 of file dca.c.

Referenced by dca_decode_frame(), and dca_decode_init().

int DCAContext::samples_deficit

deficit sample count

Definition at line 167 of file dca.c.

Referenced by dca_parse_frame_header().

float DCAContext::scale_bias

output scale

Definition at line 235 of file dca.c.

Referenced by dca_decode_init(), and dca_subsubframe().

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

scale factors (2 if transient)

Definition at line 215 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

float DCAContext::scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]

scale factor adjustment

Definition at line 206 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

int DCAContext::scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]

scale factor code book

Definition at line 203 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

int DCAContext::source_pcm_res

source pcm resolution

Definition at line 190 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::subband_activity[DCA_PRIM_CHANNELS_MAX]

subband activity count

Definition at line 199 of file dca.c.

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

float DCAContext::subband_fir_noidea[DCA_PRIM_CHANNELS_MAX][32]

Definition at line 230 of file dca.c.

Referenced by qmf_32_subbands().

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

Definition at line 228 of file dca.c.

Referenced by dca_subsubframe().

int DCAContext::subframes

number of subframes

Definition at line 196 of file dca.c.

Referenced by dca_decode_block(), and dca_parse_frame_header().

int DCAContext::subsubframes

number of subsubframes

Definition at line 209 of file dca.c.

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

int DCAContext::surround_sum

surround sum/difference flag

Definition at line 192 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::timestamp

embedded time stamp flag

Definition at line 178 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_footer().

int DCAContext::total_channels

number of channels including extensions

Definition at line 197 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::transient_huffman[DCA_PRIM_CHANNELS_MAX]

transient mode code book

Definition at line 202 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_header().

int DCAContext::transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]

transition mode (transients)

Definition at line 214 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

int DCAContext::version

encoder software revision

Definition at line 188 of file dca.c.

Referenced by dca_parse_frame_header().

int DCAContext::vq_start_subband[DCA_PRIM_CHANNELS_MAX]

high frequency vq start subband

Definition at line 200 of file dca.c.

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

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

• libavcodec/dca.c