Struct FfmpegVideoStreamDecoder 

pub struct FfmpegVideoStreamDecoder { /* private fields */ }

mediadecode::VideoStreamDecoder impl with transparent HW → SW fallback.

Implementations

impl FfmpegVideoStreamDecoder

pub fn open(parameters: Parameters, time_base: Timebase) -> Result<Self, Error>

Opens a decoder for the given codec parameters with the default HW backend probe order. If the HW probe can’t open any backend, falls back to a software ffmpeg::decoder::Video immediately — open only returns Err when both paths fail.

Subsequent mid-stream AllBackendsFailed from the HW path triggers the same SW fallback (with rescued packets replayed).

pub const fn is_software(&self) -> bool

Returns true when this decoder has fallen back to the software path. false while still on the HW probe (the initial state).

pub const fn is_hardware(&self) -> bool

Returns true while the HW probe is still active.

pub fn hardware_inner(&self) -> Option<&VideoDecoder>

Borrow the inner VideoDecoder when this decoder is still on the real HW path. Returns None after the SW fallback has fired (or, in tests, when the HW seam is a fake rather than a real decoder).

pub const fn time_base(&self) -> Timebase

Returns the time base associated with the source stream.

Trait Implementations

impl VideoStreamDecoder for FfmpegVideoStreamDecoder

type Adapter = Ffmpeg

Backend-specific vocabulary.

type Buffer = FfmpegBuffer

Buffer type held by the packets and frames this decoder produces or accepts.

type Error = VideoDecodeError

Decoder-specific error type.

fn send_packet( &mut self, packet: &VideoPacket<VideoPacketExtra, Self::Buffer>, ) -> Result<(), Self::Error>

Submits one compressed packet.

fn receive_frame( &mut self, dst: &mut VideoFrame<PixelFormat, VideoFrameExtra, Self::Buffer>, ) -> Result<(), Self::Error>

Drains one decoded frame into dst. Backends signal “no frame ready” via a backend-specific Error variant.

fn send_eof(&mut self) -> Result<(), Self::Error>

Signals end-of-stream.

fn flush(&mut self) -> Result<(), Self::Error>

Flushes internal state.