Struct cros_codecs::decoders::h264::nalu_reader::NaluReader

pub struct NaluReader<T> {
    data: Cursor<T>,
    curr_byte: u32,
    num_remaining_bits_in_curr_byte: usize,
    prev_two_bytes: u32,
    num_epb: usize,
}

A bit reader for h264 bitstreams. It properly handles emulation-prevention bytes and stop bits.

Fields

data: Cursor<T>

A reference into the next unread byte in the stream.

curr_byte: u32

Contents of the current byte. First unread bit starting at position 8 - num_remaining_bits_in_curr_bytes.

num_remaining_bits_in_curr_byte: usize

Number of bits remaining in curr_byte

prev_two_bytes: u32

Used in epb detection.

num_epb: usize

Number of epbs (i.e. 0x000003) we found.

Implementations

impl<T: AsRef<[u8]>> NaluReader<T>

pub fn new(data: T) -> Self

pub fn read_bit(&mut self) -> Result<bool>

Read a single bit from the stream.

pub fn read_bits<U: TryFrom<u32>>(&mut self, num_bits: usize) -> Result<U>

Read up to 31 bits from the stream.

pub fn skip_bits(&mut self, num_bits: usize) -> Result<()>

Skip up to 31 bits from the stream.

pub fn num_bits_left(&self) -> usize

Returns the amount of bits left in the stream

pub fn num_epb(&self) -> usize

Returns the number of emulation-prevention bytes read so far.

pub fn has_more_rsbp_data(&mut self) -> bool

Whether the stream still has RBSP data. Implements more_rbsp_data(). See the spec for more details.

pub fn read_ue<U: TryFrom<u32>>(&mut self) -> Result<U>

pub fn read_ue_max<U: TryFrom<u32>>(&mut self, max: u32) -> Result<U>

pub fn read_se<U: TryFrom<i32>>(&mut self) -> Result<U>

pub fn read_se_bounded<U: TryFrom<i32>>(
    &mut self,
    min: i32,
    max: i32
) -> Result<U>

fn get_byte(&mut self) -> Result<u8>

fn update_curr_byte(&mut self) -> Result<()>