Struct ChannelMappingTable 

pub struct ChannelMappingTable {
    pub stream_count: u8,
    pub coupled_count: u8,
    pub mapping: Vec<u8>,
}

The §5.1.1 channel-mapping table: how the N coded streams (the first M of which are stereo) combine into the stream’s C output channels.

For mapping family 0 this is synthesized from the RFC-pinned defaults (the on-wire header omits the table entirely); for families ≥ 1 it is read from the header bytes following the mapping-family octet.

Fields

stream_count: u8

N — total number of coded Opus streams in each Ogg packet (§5.1.1 item 1). Always ≥ 1.

coupled_count: u8

M — number of those streams decoded as stereo (§5.1.1 item 2). The first M streams are stereo; the remaining N − M are mono.

mapping: Vec<u8>

One index per output channel (§5.1.1 item 3). mapping[c] selects the decoded channel feeding output channel c:

• index < 2*M → stereo stream index/2, left channel if even else right.
• 2*M ≤ index < 255 → mono stream index − M.
• index == 255 → pure silence.

Implementations

impl ChannelMappingTable

pub fn decoded_channels(&self) -> u16

Total decoded channel count M + N (RFC 7845 §5.1.1 item 2). This is the number of distinct decoder channels the streams produce before the Self::mapping selects output channels.

pub fn output_channels(&self) -> u8

The output channel count C — the length of Self::mapping.

Trait Implementations

impl Clone for ChannelMappingTable

fn clone(&self) -> ChannelMappingTable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChannelMappingTable

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

Formats the value using the given formatter.

impl Eq for ChannelMappingTable

impl PartialEq for ChannelMappingTable

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ChannelMappingTable