Struct MediaCodecConfig

pub struct MediaCodecConfig { /* private fields */ }

Stores the media codec configuration for an A2DP stream, and provides utility for integration with Fuchsia media.

Implementations

impl MediaCodecConfig

pub fn build(codec_type: MediaCodecType, extra: &[u8]) -> Result<Self>

Try to build a codec config given a codec type and the codec specific information elements for the codec specified in extra. Fails with OutOfRange if the codec is not supported.

pub fn min_sbc() -> Self

Build an SBC configuration with minimum defaults for configuration (48000 Hz Mono, 16 Blocks, 8 SubBands, Loudness Allocation, 2-29 bitpool) This is the minimunm configuration requried by both Sink and Source as defined in the A2DP Specificaiton 1.2 Section 4.3.2.

pub fn min_aac_sink() -> Self

Mandatory sink configuration for AAC As defined by the A2DP Specification Sectrion 4.5

pub fn codec_type(&self) -> &MediaCodecType

pub fn codec_extra(&self) -> &[u8]

pub fn make_packet_builder( &self, max_packet_size: usize, ) -> Result<Box<dyn RtpPacketBuilder>>

pub fn supports(&self, other: &MediaCodecConfig) -> bool

Returns true if the given MediaCodecConfig is a compatible subset of this configuration.

pub fn negotiate( a: &MediaCodecConfig, b: &MediaCodecConfig, ) -> Option<MediaCodecConfig>

Negotiate the best supported configuration, given another configuration. This can be seen as a kind of intersection of the capabilities of the two configs. IF this returns Some(result), then a.supports(result) and b.supports(result) will both be true.

pub fn encoder_settings(&self) -> Result<EncoderSettings>

Retrieves a set of EncoderSettings that is suitable to configure a StreamProcessor to encode to the target configuration for this MediaCodecConfig. Returns Err(OutOfRange) if this does not specify a single configuration.

pub fn capability(&self) -> ServiceCapability

Construct a ServiceCapability that represents this codec config.

pub fn channel_count(&self) -> Result<usize>

The number of channels that is selected in the configuration. Returns OutOfRange if the configuration supports a range of channel counts.

pub fn frames_per_packet(&self) -> usize

The number of frames that should be included when building a packet to send to a peer.

pub fn pcm_frames_per_encoded_frame(&self) -> usize

pub fn rtp_frame_header(&self) -> &[u8]

pub fn sampling_frequency(&self) -> Result<u32>

Return the sampling freqeuncy selected by this configuration, or return OutOfRange if more than one is selected.

pub fn stream_encoding(&self) -> &'static str

pub fn mime_type(&self) -> &'static str

Trait Implementations

impl Clone for MediaCodecConfig

fn clone(&self) -> MediaCodecConfig

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MediaCodecConfig

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

Formats the value using the given formatter.

impl From<&MediaCodecConfig> for ServiceCapability

fn from(config: &MediaCodecConfig) -> Self

Converts to this type from the input type.

impl PartialEq for MediaCodecConfig

fn eq(&self, other: &MediaCodecConfig) -> 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 TryFrom<&ServiceCapability> for MediaCodecConfig

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &ServiceCapability) -> Result<Self, Self::Error>

Performs the conversion.

impl StructuralPartialEq for MediaCodecConfig