Struct FmtChunk

pub struct FmtChunk {
    pub format_tag: u16,
    pub channels: u16,
    pub sample_rate: u32,
    pub byte_rate: u32,
    pub block_align: u16,
    pub bits_per_sample: u16,
    pub extension: Option<FmtExtension>,
}

• The fmt chunk for the WAV file.

Fields

format_tag: u16

• See https://github.com/tpn/winsdk-10/blob/master/Include/10.0.14393.0/shared/mmreg.h

channels: u16

• Num channels

sample_rate: u32

• Sample rate. It’s actually frame_rate because it’s the rate of how frequently the audio frames are played.
• Each audio frame contains samples for each channel. For example, your audio file has two samples, which means an audio frame is two samples for each channel.
• For another example, if the sample rate is 44100, but the channels are 2, it plays 88200 samples per second.

byte_rate: u32

• How many bytes are to be played in a second. This field is important because lots of audio players use this field to calculate the playback progress.

block_align: u16

• Block size. For PCM, it’s sample size in bytes times to channel number. For non-PCM, it’s the block size for the audio blocks.
• The block size field is for quickly seek() the audio file.

bits_per_sample: u16

• For PCM, this indicates how many bits are in a sample. For non-PCM, this field is either zero or some other meaningful value for the encoded format.

extension: Option<FmtExtension>

• The extension block for the fmt chunk, its type depends on the format_tag value.

Implementations

impl FmtChunk

pub fn new() -> Self

pub fn read( reader: &mut impl Reader, chunk_size: u32, ) -> Result<Self, AudioReadError>

pub fn write(&self, writer: &mut dyn Writer) -> Result<(), AudioWriteError>

pub fn get_sample_format(&self) -> SampleFormat

pub fn get_sample_type(&self) -> WaveSampleType

Trait Implementations

impl Clone for FmtChunk

fn clone(&self) -> FmtChunk

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FmtChunk

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FmtChunk

fn default() -> Self

Returns the “default value” for a type.