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This patch is analogous to 20f972701806be20a77f808db332d9489343bb78:
It hides the internal part of AVBitStreamFilter by adding a new
internal structure FFBitStreamFilter (declared in bsf_internal.h)
that has an AVBitStreamFilter as its first member; the internal
part of AVBitStreamFilter is moved to this new structure.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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Also, place the BSF api docs in their own doxygen group.
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Do this by allocating AVBSFContext together with the data that is
currently in AVBSFInternal; or rather: Put AVBSFContext at the beginning
of a new structure called FFBSFContext (which encompasses more than just
the internal fields and is a proper context in its own right, hence the
name) and remove the AVBSFInternal altogether.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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Mention an example scenario where the function should be used.
Signed-off-by: James Almer <jamrial@gmail.com>
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EAGAIN is returned when input is provided but can't be consumed. The filtering
process is unaffected in this case, and the function will be able to consume
new input after retrieving filtered packets with av_bsf_receive_packet().
Remove the line about empty packets never failing added in
41b05b849f215b03eeb9e3608571ba47de64182a while at it. Even if it's currently
the case, it unnecessarily constrains the API and could be changed in the future
in case it needs to be extended.
The user should always check for errors and never expect a call to never fail.
Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
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This will allow adding a public header named bsf.h
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Up until now the documentation of ff_bsf_get_packet_ref() allowed return
values >= 0 in case of success, whereas av_bsf_receive_packet() only
allows 0 on success. Given that for some bitstream filters the return
value of ff_bsf_get_packet_ref() is forwarded to the caller of
av_bsf_receive_packet() without any filtering, there would be a problem
if ff_bsf_get_packet_ref() actually returned values > 0. But it
currently doesn't and there is no reason why it should ever do so.
Therefore this commit aligns the return values of these functions by
restricting ff_bsf_get_packet_ref() to always returns 0 on success.
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
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Use of this function can save unnecessary malloc operation
in bitstream filter.
Signed-off-by: Jan Sebechlebsky <sebechlebskyjan@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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* commit '41ed7ab45fc693f7d7fc35664c0233f4c32d69bb':
cosmetics: Fix spelling mistakes
Merged-by: Clément Bœsch <u@pkh.me>
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Signed-off-by: Diego Biurrun <diego@biurrun.de>
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* commit '33d18982fa03feb061c8f744a4f0a9175c1f63ab':
lavc: add a new bitstream filtering API
Conversions-by: Hendrik Leppkes <h.leppkes@gmail.com>
Conversions-by: Derek Buitenguis <derek.buitenhuis@gmail.com>
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
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Deprecate the current bitstream filtering API.
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