jpegdecoder: fail early if no input caps have been provided

The jpegdecoder class does not implement the ->parse() virtual function,
and we always need to add the jpegparse element before it. So we should
set_needs_format of the decoder to TRUE, then if no parse before it, it
can fail with a "not-negotiated" error early, rather than go on and
generate unexpected error.

Fixes: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1829
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4066>
This commit is contained in:
He Junyan 2023-02-24 21:58:00 +08:00 committed by GStreamer Marge Bot
parent f188e06d54
commit 4c762b7717

View file

@ -90,6 +90,8 @@ static void
gst_jpeg_decoder_init (GstJpegDecoder * self)
{
gst_video_decoder_set_packetized (GST_VIDEO_DECODER (self), TRUE);
gst_video_decoder_set_needs_format (GST_VIDEO_DECODER (self), TRUE);
self->priv = gst_jpeg_decoder_get_instance_private (self);
}