[Bug 727975] New: [adpcmdec] WAV IMA ADPCM files don't get decoded correctly

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=727975
  GStreamer | gst-plugins-bad | 1.2.1

           Summary: [adpcmdec] WAV IMA ADPCM files don't get decoded
                    correctly
    Classification: Platform
           Product: GStreamer
           Version: 1.2.1
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: tiagokatcipis at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=274009)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=274009)
Audio file that can reproduce the problem

The problem has been described in detail on the mailing list:

http://lists.freedesktop.org/archives/gstreamer-devel/2014-April/047322.html

Basically if i try to play a IMA ADPCM WAV file, the playback gets a lot of
gaps on it and only the half of the duration of the file is actually played.

Also, querying the duration of the audio in time gets in result half of the
actual duration.

I'm attaching a example file that can be used to reproduce the problem, just
try to play it with adpcmdec and it is clear that it is not working properly:

gst-launch-1.0 filesrc location=test-adpcm.wav ! wavparse ! adpcmdec !
audioconvert ! pulsesink

The file seems to be ok and valid, and plays correctly using "play".

file test-adpcm.wav 
test-adpcm.wav: RIFF (little-endian) data, WAVE audio, IMA ADPCM, mono 8000 Hz

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