[Bug 751386] New: aacparse: cannot set LOAS src caps

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=751386

            Bug ID: 751386
           Summary: aacparse: cannot set LOAS src caps
    Classification: Platform
           Product: GStreamer
           Version: 1.5.1
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: guillaume.marquebielle at parrot.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 305922
  --> https://bugzilla.gnome.org/attachment.cgi?id=305922&action=edit
Patch fixing the issue

I'm testing with some AAC file extracted from live TV stream.
The file starts with LOAS frames with no configuration ("use previous config"
bit set).
On first LOAS frame, this leads to have aacparse->sample_rate at 0 and
aacparse->channels at 0 too.

As the element don't have any src caps set, we try to set src caps with these
sample rate and channels leading to pipeline error.

The fix proposes to avoid setting src caps till we get a valid configuration
from next LOAS frames.

This works correctly with the sample attached (AAC file gdppayed)

Thx

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