SubStream Struct Reference

Data Fields
uint8_t	restart_seen
	Set if a valid restart header has been read. Otherwise the substream cannot be decoded. More...
uint16_t	noise_type
	restart header data More...
uint8_t	min_channel
	The index of the first channel coded in this substream. More...
uint8_t	max_channel
	The index of the last channel coded in this substream. More...
uint8_t	max_matrix_channel
	The number of channels input into the rematrix stage. More...
uint8_t	ch_assign [MAX_CHANNELS]
	For each channel output by the matrix, the output channel to map it to. More...
uint64_t	mask
	The channel layout for this substream. More...
enum AVMatrixEncoding	matrix_encoding
	The matrix encoding mode for this substream. More...
ChannelParams	channel_params [MAX_CHANNELS]
	Channel coding parameters for channels in the substream. More...
uint8_t	noise_shift
	The left shift applied to random noise in 0x31ea substreams. More...
uint32_t	noisegen_seed
	The current seed value for the pseudorandom noise generator(s). More...
uint8_t	data_check_present
	Set if the substream contains extra info to check the size of VLC blocks. More...
uint8_t	param_presence_flags
	Bitmask of which parameter sets are conveyed in a decoding parameter block. More...
uint8_t	num_primitive_matrices
	matrix data More...
uint8_t	matrix_out_ch [MAX_MATRICES]
	matrix output channel More...
uint8_t	lsb_bypass [MAX_MATRICES]
	Whether the LSBs of the matrix output are encoded in the bitstream. More...
int32_t	matrix_coeff [MAX_MATRICES][MAX_CHANNELS]
	Matrix coefficients, stored as 2.14 fixed point. More...
uint8_t	matrix_noise_shift [MAX_MATRICES]
	Left shift to apply to noise values in 0x31eb substreams. More...
uint8_t	quant_step_size [MAX_CHANNELS]
	Left shift to apply to Huffman-decoded residuals. More...
uint16_t	blocksize
	number of PCM samples in current audio block More...
uint16_t	blockpos
	Number of PCM samples decoded so far in this frame. More...
int8_t	output_shift [MAX_CHANNELS]
	Left shift to apply to decoded PCM values to get final 24-bit output. More...
int32_t	lossless_check_data
	Running XOR of all output samples. More...

Detailed Description

Definition at line 51 of file mlpdec.c.

Field Documentation

restart_seen

uint8_t SubStream::restart_seen

Set if a valid restart header has been read. Otherwise the substream cannot be decoded.

Definition at line 53 of file mlpdec.c.

Referenced by read_major_sync().

noise_type

uint16_t SubStream::noise_type

restart header data

The type of noise to be used in the rematrix stage.

Definition at line 58 of file mlpdec.c.

min_channel

uint8_t SubStream::min_channel

The index of the first channel coded in this substream.

Definition at line 61 of file mlpdec.c.

max_channel

uint8_t SubStream::max_channel

The index of the last channel coded in this substream.

Definition at line 63 of file mlpdec.c.

max_matrix_channel

uint8_t SubStream::max_matrix_channel

The number of channels input into the rematrix stage.

Definition at line 65 of file mlpdec.c.

Referenced by read_major_sync().

ch_assign

uint8_t SubStream::ch_assign[MAX_CHANNELS]

For each channel output by the matrix, the output channel to map it to.

Definition at line 67 of file mlpdec.c.

Referenced by read_major_sync().

mask

uint64_t SubStream::mask

The channel layout for this substream.

Definition at line 69 of file mlpdec.c.

Referenced by read_major_sync().

matrix_encoding

enum AVMatrixEncoding SubStream::matrix_encoding

The matrix encoding mode for this substream.

Definition at line 71 of file mlpdec.c.

Referenced by read_major_sync().

channel_params

ChannelParams SubStream::channel_params[MAX_CHANNELS]

Channel coding parameters for channels in the substream.

Definition at line 74 of file mlpdec.c.

noise_shift

uint8_t SubStream::noise_shift

The left shift applied to random noise in 0x31ea substreams.

Definition at line 77 of file mlpdec.c.

noisegen_seed

uint32_t SubStream::noisegen_seed

The current seed value for the pseudorandom noise generator(s).

Definition at line 79 of file mlpdec.c.

data_check_present

uint8_t SubStream::data_check_present

Set if the substream contains extra info to check the size of VLC blocks.

Definition at line 82 of file mlpdec.c.

param_presence_flags

uint8_t SubStream::param_presence_flags

Bitmask of which parameter sets are conveyed in a decoding parameter block.

Definition at line 85 of file mlpdec.c.

num_primitive_matrices

uint8_t SubStream::num_primitive_matrices

matrix data

Number of matrices to be applied.

Definition at line 100 of file mlpdec.c.

matrix_out_ch

uint8_t SubStream::matrix_out_ch[MAX_MATRICES]

matrix output channel

Definition at line 103 of file mlpdec.c.

lsb_bypass

uint8_t SubStream::lsb_bypass[MAX_MATRICES]

Whether the LSBs of the matrix output are encoded in the bitstream.

Definition at line 106 of file mlpdec.c.

matrix_coeff

int32_t SubStream::matrix_coeff[MAX_MATRICES][MAX_CHANNELS]

Matrix coefficients, stored as 2.14 fixed point.

Definition at line 108 of file mlpdec.c.

matrix_noise_shift

uint8_t SubStream::matrix_noise_shift[MAX_MATRICES]

Left shift to apply to noise values in 0x31eb substreams.

Definition at line 110 of file mlpdec.c.

quant_step_size

uint8_t SubStream::quant_step_size[MAX_CHANNELS]

Left shift to apply to Huffman-decoded residuals.

Definition at line 114 of file mlpdec.c.

blocksize

uint16_t SubStream::blocksize

number of PCM samples in current audio block

Definition at line 117 of file mlpdec.c.

blockpos

uint16_t SubStream::blockpos

Number of PCM samples decoded so far in this frame.

Definition at line 119 of file mlpdec.c.

output_shift

int8_t SubStream::output_shift[MAX_CHANNELS]

Left shift to apply to decoded PCM values to get final 24-bit output.

Definition at line 122 of file mlpdec.c.

Referenced by read_major_sync().

lossless_check_data

int32_t SubStream::lossless_check_data

Running XOR of all output samples.

Definition at line 125 of file mlpdec.c.

Referenced by mlp_decode_init().

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

• libavcodec/mlpdec.c