[mythtv-users] Fwd: [mythtv-commits] mythtv branch master updated by jyavenard. v0.28-pre-893-g443b624

[Russell Gower]

Begin forwarded message:

> From: noreply at mythtv.org (Git Repo Owner)
> Subject: [mythtv-commits] mythtv branch master updated by jyavenard. v0.28-pre-893-g443b624
> Date: 23 February 2014 10:02:48 GMT
> To: mythtv-commits at mythtv.org,mythtv-firehose at mythtv.org
> Reply-To: mythtv-dev at mythtv.org
> 
> The branch, master has been updated on the
> mythtv repository by gitolite user jyavenard.
>       via  443b624ebcc8ea56026cb49ca833edc7d73832c1 (commit)
>       via  fafc658597b547e2f0173032515e9790170ebcbe (commit)
>      from  b00e85edd397b2424cc54bcb81d7e6951f6109a4 (commit)
> 
> Those revisions listed above that are new to this repository have
> not appeared on any other notification email; so we list those
> revisions in full, below.
> 
> - Log -----------------------------------------------------------------
> commit 443b624ebcc8ea56026cb49ca833edc7d73832c1
> Author:    Jean-Yves Avenard <jyavenard at mythtv.org> at Sun, 23 Feb 2014 20:24:28 +1100
> Committer: Jean-Yves Avenard <jyavenard at mythtv.org> at Sun, 23 Feb 2014 20:27:40 +1100
> URL:       http://code.mythtv.org/cgit/mythtv/commit/?id=443b624ebcc8ea56026cb49ca833edc7d73832c1
> 
> Prevent playback to exit early should backend's writes be delayed
> Typical scenario is when watching on-going recordings and being very close to real time TV: should the backend take more than 360ms between two writes, the reader would treat it as an EOF and abort the read.
> 
> When encountering EOF, we now check if the file is being written to in parallel and if so wait.
> 
> We can also remove all EOF retries in FileRingBuffer::safe_read() as we definitely know now if we did reach EOF (as we check against the file size).
> This allows for almost instantaneous program transition in live TV.
> 
> 
> 
> commit fafc658597b547e2f0173032515e9790170ebcbe
> Author:    Jean-Yves Avenard <jyavenard at mythtv.org> at Sun, 23 Feb 2014 20:19:50 +1100
> Committer: Jean-Yves Avenard <jyavenard at mythtv.org> at Sun, 23 Feb 2014 20:27:40 +1100
> URL:       http://code.mythtv.org/cgit/mythtv/commit/?id=fafc658597b547e2f0173032515e9790170ebcbe
> 
> Have backend advertise which files are currently being written to
> It is necessary in some playback scenarios to know if a file being read is currently being written to. This is useful in determining when encountering EOF if we should wait for more data or abort the read.
> 
> MythCoreContext will now keep track of files as they are being opened for writing
> Connected frontends will receive the information via the event socket in the form of a BACKEND_MESSAGE event.
> 
> The myth protocol is extended with two new BACKEND_MESSAGE events:
> FILE_WRITTEN: Sent when a file is opened in write mode, and when the file is being written to (at most every 10s)
> FILE_CLOSED: Sent when the file opened in write mode is closed.
> 
> The myth protocol version doesn’t have to be increased as frontends will make use of it only if available and the changes are backward compatible with exiting myth protocol.
> 
> 
> 
> -----------------------------------------------------------------------
> 
> Summary of changes:
> mythtv/libs/libmythbase/mythcorecontext.cpp    |   98 ++++++++++++++++++++++++
> mythtv/libs/libmythbase/mythcorecontext.h      |    4 +
> mythtv/libs/libmythbase/threadedfilewriter.cpp |   62 +++++++++++-----
> mythtv/libs/libmythbase/threadedfilewriter.h   |    1 +
> mythtv/libs/libmythtv/fileringbuffer.cpp       |   10 ++-
> mythtv/libs/libmythtv/ringbuffer.cpp           |   24 ++++++-
> 6 files changed, 179 insertions(+), 20 deletions(-)
> 
> -- 
> 
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Hi Jean-Yves,
  I've back ported the changes to 0.27-fixes and am build a new set of RPMs as I write, i'll let you know how it goes.

Thanks again.

Russell
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