Struct Vp9CodecConfig 

pub struct Vp9CodecConfig {
    pub profile: u8,
    pub level: u8,
    pub bit_depth: u8,
    pub chroma_subsampling: u8,
    pub video_full_range: bool,
    pub color_primaries: u8,
    pub transfer_characteristics: u8,
    pub matrix_coefficients: u8,
}

A VP9 stream’s codec configuration: what an MP4 vpcC box or a WebM CodecPrivate element says about it.

The VP9 bitstream describes itself, so this is a summary for capability discovery and codec strings rather than something decoding needs. The vpcC box is version 1 of the VP Codec ISO Media File Format Binding (VPCodecConfigurationRecord); version 0, an earlier draft some muxers still write, is read as well. WebM’s CodecPrivate is the optional list of (ID, length, value) features of the WebM VP9 codec mapping, of which profile (1), level (2), bit depth (3) and chroma subsampling (4) are defined; any it leaves out take the profile 0 defaults.

Fields

profile: u8

level: u8

The VP9 level times ten (31 is level 3.1), or 0 when unspecified.

bit_depth: u8

chroma_subsampling: u8

0 and 1 are 4:2:0 (vertical and colocated chroma), 2 is 4:2:2 and 3 is 4:4:4.

video_full_range: bool

color_primaries: u8

ISO/IEC 23091-2 color description; 2 means unspecified.

transfer_characteristics: u8

matrix_coefficients: u8

Implementations

impl Vp9CodecConfig

pub fn parse(bytes: &[u8]) -> Result<Vp9CodecConfig, Error>

Reads a complete vpcC box (size, type and payload) or, when the bytes are not one, a WebM CodecPrivate. Empty bytes are an empty CodecPrivate.

pub fn parse_vpcc(whole: &[u8]) -> Result<Vp9CodecConfig, Error>

Reads a complete vpcC box.

pub fn parse_webm_codec_private(bytes: &[u8]) -> Result<Vp9CodecConfig, Error>

Reads a WebM VP9 CodecPrivate.

pub fn is_420(&self) -> bool

Whether the stream is 4:2:0.

pub fn codec_profile(&self) -> Result<CodecProfile, Error>

The normalized profile.

pub fn to_vpcc(&self) -> Vec<u8>

The complete version 1 vpcC box describing this configuration, with no codec initialization data.

pub fn codec_string(&self) -> String

The vp09.PP.LL.DD codec string of the VP9 ISO-BMFF binding, which WebCodecs and MediaSource accept. An unspecified or invalid level is written as level 1.0, since the string requires one.

Trait Implementations

impl Clone for Vp9CodecConfig

fn clone(&self) -> Vp9CodecConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Vp9CodecConfig

impl Debug for Vp9CodecConfig

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

Formats the value using the given formatter.

impl Default for Vp9CodecConfig

fn default() -> Vp9CodecConfig

Returns the “default value” for a type.

impl Eq for Vp9CodecConfig

impl PartialEq for Vp9CodecConfig

fn eq(&self, other: &Vp9CodecConfig) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Vp9CodecConfig