Enum DecoderImpl 

pub enum DecoderImpl {
    Y4m(Y4mDecoder<Box<dyn Read>>),
}

Internal enum representing different decoder backend implementations.

This enum is used internally by the Decoder struct to store the specific decoder implementation being used. The appropriate variant is selected automatically based on the input format and available features during decoder initialization.

Each variant wraps a different decoder backend, allowing the unified Decoder interface to support multiple video formats and processing libraries.

Variants

Y4m(Y4mDecoder<Box<dyn Read>>)

Y4M format decoder using the built-in y4m parser.

This variant provides fast, low-overhead decoding of Y4M (YUV4MPEG2) format files. It’s always available and is preferred for Y4M files due to its performance characteristics. The decoder reads from any source implementing the Read trait.