asf_header_info Struct Reference

Data Fields
int	header_len
int	audio_stream_info_start
uint8_t	channels
uint16_t	sample_rate
uint16_t	block_align
uint32_t	bit_rate
uint32_t	flags1
uint16_t	flags2
bool	use_exp_vlc
bool	use_bit_reservoir
bool	use_variable_block_len
uint32_t	packet_size

Detailed Description

Information contained in an asf audio file header.

Both para_filter and para_afh need to read the header.

Field Documentation

header_len

int header_len

The size of the audio file header.

Referenced by read_asf_header().

audio_stream_info_start

int audio_stream_info_start

Offset of the audio stream info header.

channels

uint8_t channels

Number of channels.

sample_rate

uint16_t sample_rate

One of the 5 possible sample rates.

block_align

uint16_t block_align

Size of one data block.

bit_rate

uint32_t bit_rate

Bits per second.

flags1

uint32_t flags1

Further decoding information (ignored).

flags2

uint16_t flags2

Encodes exp_vlc, bit reservoir, vbl, number of block sizes.

use_exp_vlc

bool use_exp_vlc

Whether exponents are coded with VLC codes.

use_bit_reservoir

bool use_bit_reservoir

If false, a frame is equal to a superframe.

use_variable_block_len

bool use_variable_block_len

Whether blocks are of variable or of constant size.

packet_size

uint32_t packet_size

Obtained from the file properties object.

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

• wma.h