[pulseaudio-tickets] [Bug 53911] New: resampler leftover buffer is not taken into account when rewinding

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=53911

             Bug #: 53911
           Summary: resampler leftover buffer is not taken into account
                    when rewinding
    Classification: Unclassified
           Product: PulseAudio
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: core
        AssignedTo: pulseaudio-bugs at lists.freedesktop.org
        ReportedBy: tanuk at iki.fi
         QAContact: pulseaudio-bugs at lists.freedesktop.org
                CC: lennart at poettering.net


The resampler leftover buffer can contain data from a sink input, data which
has been popped from the sink input implementor but not yet pushed to the
render_memblockq. That data is not currently taken into account when rewinding.
When doing a rewind that affects the resampler, the leftover data is discarded,
and that is not compensated in any way, which means that the data is completely
lost and there's a skip in the audio.

In practice the leftover buffer is rarely used and even if it is used, it will
contain a minimal amount of data, so the user-visible effect of this bug is
minor.

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