flacdec: fix intermittent FLAC__STREAM_DECODER_ABORTED errors when seeking

When seeking in a local flac file (ie. operating pull-based), the decoder
would often just error out after the loop function sees a DECODER_ABORTED
status. This, however, is the read callback's way of telling our loop
function that pull_range failed and streaming should stop, in this case
because of the flush-start event that the seek handler pushed upstream
from the seeking thread. Handle this slightly better by storing the last
flow return from pull_range, so the loop function can evaluate it properly
when it encounters a DECODER_ABORTED and take the right action.

Fixes #578612.

1 files changed, 2 insertions, 0 deletions

diff --git a/ext/flac/gstflacdec.h b/ext/flac/gstflacdec.h
index a9daf3e9..e6a76bbb 100644
--- a/ext/flac/gstflacdec.h
+++ b/ext/flac/gstflacdec.h
@@ -74,6 +74,8 @@ struct _GstFlacDec {
   GstEvent      *start_segment;
   GstTagList    *tags;
 
+  GstFlowReturn  pull_flow;   /* last flow from pull_range */ /* STREAM_LOCK */
+
   GstFlowReturn  last_flow;   /* the last flow return received from either
                                * gst_pad_push or gst_pad_buffer_alloc */