[FFmpeg-devel] [PATCH v3 1/2] lavf: Add general API for IO buffer synchronization.

Andrey Semashev andrey.semashev at gmail.com
Mon Dec 24 12:56:04 EET 2018

On 12/21/18 2:48 AM, Michael Niedermayer wrote:
> On Thu, Dec 20, 2018 at 11:00:32AM +0100, Nicolas George wrote:
>> Andrey Semashev (2018-12-10):
>>> This commit adds a new set of functions to avio and url subsystems, which
>>> allow users to invoke IO buffer synchronization with the underlying media.
>>> The most obvious target for this extension if the filesystem streams. Invoking
>>> IO synchronization allows user applications to ensure that all written content
>>> has reached the filesystem on the media and can be observed by other processes.
>>> The public API for this is avio_sync() function, which can be called on
>>> AVIOContext. The internal, lower layer API is ffurl_sync(), which works
>>> directly on the underlying URLContext. URLContext backends can add support for
>>> this new API by setting the sync handler to the new url_sync member of
>>> URLProtocol. When no handler is set then the sync operation is a no-op,
>>> the result code is AVERROR(ENOSYS).
>>> ---
>>>   libavformat/avio.c    |  7 +++++++
>>>   libavformat/avio.h    | 20 ++++++++++++++++++++
>>>   libavformat/aviobuf.c | 17 +++++++++++++++++
>>>   libavformat/url.h     | 12 ++++++++++++
>>>   4 files changed, 56 insertions(+)
>> I have no more objections to the patch as it is, thanks. But I have no
>> opinion in favor of it either; it is useful in principle, but I do not
>> know if it is worth the extra maintenance for a use case like this
>> project. I will leave the judgement to others.
> IMHO, it looks useful and extra maintaince needed seems not major

So, will this patchset be merged then?

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