DCAContext Struct Reference


Data Fields

AVCodecContextavctx
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 is_channels_set
 check for if the channel number is already set
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 [DCA_SUBFRAMES_MAX]
 number of subsubframes
int partial_samples [DCA_SUBFRAMES_MAX]
 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_LFE_MAX *(DCA_BLOCKS_MAX+4)]
 Low frequency effect data.
int lfe_scale_factor
float subband_samples_hist [DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4]

Detailed Description

Definition at line 258 of file dca.c.


Field Documentation

type of the current frame

Definition at line 261 of file dca.c.

Referenced by dca_parse_frame_header().

deficit sample count

Definition at line 262 of file dca.c.

Referenced by dca_parse_frame_header().

crc is present in the bitstream

Definition at line 263 of file dca.c.

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

number of PCM sample blocks

Definition at line 264 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

primary frame byte size

Definition at line 265 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

audio channels arrangement

Definition at line 266 of file dca.c.

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

audio sampling rate

Definition at line 267 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

transmission bit rate

Definition at line 268 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

transmission bit rate index

Definition at line 269 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

embedded downmix enabled

Definition at line 271 of file dca.c.

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

embedded dynamic range flag

Definition at line 272 of file dca.c.

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

embedded time stamp flag

Definition at line 273 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_footer().

auxiliary data flag

Definition at line 274 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subframe_footer().

source material is mastered in HDCD

Definition at line 275 of file dca.c.

Referenced by dca_parse_frame_header().

extension audio descriptor flag

Definition at line 276 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

extended coding flag

Definition at line 277 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

audio sync word insertion flag

Definition at line 278 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

low frequency effects flag

Definition at line 279 of file dca.c.

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

predictor history flag

Definition at line 280 of file dca.c.

Referenced by dca_parse_frame_header(), and dca_subsubframe().

header crc check bytes

Definition at line 281 of file dca.c.

Referenced by dca_parse_frame_header().

multirate interpolator switch

Definition at line 282 of file dca.c.

Referenced by dca_parse_frame_header(), and qmf_32_subbands().

encoder software revision

Definition at line 283 of file dca.c.

Referenced by dca_parse_frame_header().

copy history

Definition at line 284 of file dca.c.

Referenced by dca_parse_frame_header().

source pcm resolution

Definition at line 285 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

front sum/difference flag

Definition at line 286 of file dca.c.

Referenced by dca_parse_frame_header().

surround sum/difference flag

Definition at line 287 of file dca.c.

Referenced by dca_parse_frame_header().

dialog normalisation parameter

Definition at line 288 of file dca.c.

Referenced by dca_parse_frame_header().

number of subframes

Definition at line 291 of file dca.c.

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

check for if the channel number is already set

Definition at line 292 of file dca.c.

Referenced by dca_decode_frame().

number of channels including extensions

Definition at line 293 of file dca.c.

Referenced by dca_parse_audio_coding_header().

number of primary audio channels

Definition at line 294 of file dca.c.

Referenced by dca_decode_frame(), dca_filter_channels(), dca_parse_audio_coding_header(), dca_subframe_header(), and dca_subsubframe().

int DCAContext::subband_activity[DCA_PRIM_CHANNELS_MAX]

subband activity count

Definition at line 295 of file dca.c.

Referenced by dca_parse_audio_coding_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 296 of file dca.c.

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

int DCAContext::joint_intensity[DCA_PRIM_CHANNELS_MAX]

joint intensity coding index

Definition at line 297 of file dca.c.

Referenced by dca_parse_audio_coding_header(), and dca_subframe_header().

int DCAContext::transient_huffman[DCA_PRIM_CHANNELS_MAX]

transient mode code book

Definition at line 298 of file dca.c.

Referenced by dca_parse_audio_coding_header(), and dca_subframe_header().

int DCAContext::scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]

scale factor code book

Definition at line 299 of file dca.c.

Referenced by dca_parse_audio_coding_header(), and dca_subframe_header().

int DCAContext::bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]

bit allocation quantizer select

Definition at line 300 of file dca.c.

Referenced by dca_parse_audio_coding_header(), and dca_subframe_header().

int DCAContext::quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]

quantization index codebook select

Definition at line 301 of file dca.c.

Referenced by dca_parse_audio_coding_header(), and dca_subsubframe().

float DCAContext::scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]

scale factor adjustment

Definition at line 302 of file dca.c.

Referenced by dca_parse_audio_coding_header(), and dca_subsubframe().

int DCAContext::subsubframes[DCA_SUBFRAMES_MAX]

number of subsubframes

Definition at line 305 of file dca.c.

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

int DCAContext::partial_samples[DCA_SUBFRAMES_MAX]

partial subsubframe samples count

Definition at line 306 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 307 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 308 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 309 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 310 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 311 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 312 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 313 of file dca.c.

Referenced by dca_subframe_header().

int DCAContext::downmix_coef[DCA_PRIM_CHANNELS_MAX][2]

stereo downmix coefficients

Definition at line 314 of file dca.c.

Referenced by dca_filter_channels(), and dca_subframe_header().

dynamic range coefficient

Definition at line 315 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 317 of file dca.c.

Referenced by dca_subframe_header(), and dca_subsubframe().

float DCAContext::lfe_data[2 *DCA_LFE_MAX *(DCA_BLOCKS_MAX+4)]

Low frequency effect data.

Definition at line 319 of file dca.c.

Referenced by dca_decode_frame(), dca_filter_channels(), and dca_subframe_header().

Definition at line 320 of file dca.c.

Referenced by dca_subframe_header().

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

Definition at line 323 of file dca.c.

Referenced by dca_subsubframe().


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

Generated on Mon May 2 19:50:34 2011 for FFmpeg by  doxygen 1.5.6