From: "Hamad Kadmany" <hkadmany@codeaurora.org>
To: <linux-media@vger.kernel.org>
Subject: [media][dvb-core] Question on dvr device copy
Date: Sun, 12 Feb 2012 16:19:24 +0200 [thread overview]
Message-ID: <000001cce991$53bf56c0$fb3e0440$@codeaurora.org> (raw)
Hi,
Currently when playing stream from memory through dvr device (through write
calls), the written buffer is copied from user-space to kernel space. The
same applies when recording a stream, the TS packets received from HW are
copied to dvr ring-buffer.
I'm a bit concerned about the performance due to the copy, and whether we
better have a memory mapped ring-buffer in dvr device output and/or dvr
device input with user-space to cope with high bitrate streams.
Your feedback on this will be mostly appreciated.
Thanks
Hamad
next reply other threads:[~2012-02-12 14:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-12 14:19 Hamad Kadmany [this message]
2012-02-14 7:33 ` [media][dvb-core] Question on dvr device copy Hamad Kadmany
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