Trait cros_codecs::decoders::h264::backends::StatelessDecoderBackend

source · [−]
pub(crate) trait StatelessDecoderBackend: VideoDecoderBackend {
    fn new_sequence(&mut self, sps: &Sps) -> Result<()>;
    fn new_picture(&mut self, picture: &PictureData, timestamp: u64) -> Result<()>;
    fn new_field_picture(
        &mut self,
        picture: &PictureData,
        timestamp: u64,
        first_field: &Self::Handle
    ) -> Result<()>;
    fn handle_picture(
        &mut self,
        picture: &PictureData,
        timestamp: u64,
        sps: &Sps,
        pps: &Pps,
        dpb: &Dpb<Self::Handle>,
        slice: &Slice<&[u8]>
    ) -> Result<()>;
    fn decode_slice(
        &mut self,
        slice: &Slice<&[u8]>,
        sps: &Sps,
        pps: &Pps,
        dpb: &Dpb<Self::Handle>,
        ref_pic_list0: &[DpbEntry<Self::Handle>],
        ref_pic_list1: &[DpbEntry<Self::Handle>]
    ) -> Result<()>;
    fn submit_picture(
        &mut self,
        picture: &PictureData,
        block: BlockingMode
    ) -> Result<Self::Handle>;
}
Expand description

Trait for stateless decoder backends. The decoder will call into the backend to request decode operations. The backend can operate in blocking mode, where it will wait until the current decode finishes, or in non-blocking mode, where it should return immediately with any previously decoded frames that happen to be ready.

Required Methods

Called when a new SPS is parsed.

Called when the decoder determines that a frame or field was found.

Called when the decoder determines that a second field was found. Indicates that the underlying BackendHandle is to be shared between the two pictures. This is so both fields decode to the same underlying resource and can thus be presented together as a single frame.

Called by the decoder for every frame or field found.

Called to dispatch a decode operation to the backend.

Called when the decoder wants the backend to finish the decoding operations for picture. At this point, decode_slice has been called for all slices. The argument block dictates whether this call should wait until the current decode finishes, or whether it should return immediately.

This call will assign the ownership of the BackendHandle to the Picture and then assign the ownership of the Picture to the Handle.

Implementors