pulsesink: writeable size will increase bigger than total buffer size if no data feed to pulse

[Bing Song]

Hi,

I report one bug: https://bugzilla.gnome.org/show_bug.cgi?id=742141

But it isn't a bug, just want ask question.

Is it reasonable below writeable size will increase bigger than total buffer
size if no data feed to pulse?

        pbuf->m_writable = pa_stream_writable_size (pbuf->stream);


Do I need fix writable size increase issue or I need feed data at anytime (send GAP event when no audio data)? Our implement will sent EOS to audio pipeline when backward playback and no audio data feed to pulse.

Regards,
Song Bing.
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