LCEVCdec supports different pixel aspect ratios other than 1/1. This change
forwards the pixel aspect ratio of the base picture to the LCEVC decoder,
and also updates the output pixel aspect ratio caps base on the one from the
enhanced frame.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9463>
The output resolution is not always twice as big as the input resultion divided
by the pixel aspect ratio. This is the case for LCEVC '0D' mode, where the
output resolution is the same as the input resolution, and the only enhancement
is the picture being clearer.
This patch uses LCEVC_PeekDecoder() after sending the LCEVC enhancement data to
know what the output resolution will be before allocating the output picture.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9463>
Even though the LCEVC decoder works fine without this, it is recommended to
set read access to base pictures that are sent to the decoder, and write access
to enhanced pictures that are received from the decoder.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9463>
The LCEVC_ReceiveDecoderBase() and LCEVC_ReceiveDecoderPicture() APIs from the
LCEVCdec SDK can return LCEVC_Error if the enhancement data is wrong. This
change improves the lcevcdec element to check for those errors and stop the
pipeline when that happens.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9057>
This new element wraps both the base H264 decoder and lcevcdec elements into a
bin so that LCEVC decoding works with auto-plugging elements such as decodebin.
By default, the H264 decoder element with higher rank is used as base decoder,
but any particular H264 decoder can be used by manually setting the base-decoder
property.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7330>
This new LCEVC decoder plugin is meant to implement all LCEVC decoder elements.
For now, it only implements the LCEVC enhancement decoder (lcevcdec) element.
This element essentially enhances raw video frames using the LCEVC metadata
attached to input buffers into a higher resolution frame. The element is only
meant to be used after any base decoder (eg avdec_h264).
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7330>
