Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

AVFilterLink.frame_count is supposed to count the number of frames
that were passed on the link, but with min_samples, that number is
not always the same for the source and destination filters.
With the addition of a FIFO on the link, the difference will become
more significant.

Split the variable in two: frame_count_in counts the number of
frames that entered the link, frame_count_out counts the number
of frames that were sent to the destination filter.

To be used in following commits.

The destination filter might expect the hw frames context to be already
set (this is the case e.g. for hwdownload).

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Instead of calling the input filter request_frame() method,
ff_request_frame() now marks the link and returns immediately.
buffersink is changed to activate the marked filters until
a frame is obtained.

The status field can carry any error code instead of just EOF.
Also only update it through a wrapper function and provide a timestamp.
Update the few filters that used it directly.

This field is used for fast comparison between link ages,
it is in AV_TIME_BASE units, in other words microseconds,
µs =~ us.
Renaming it allows a second field in link time base units.

(cherry picked from ffmpeg commit 7b42036b3b)

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Filters which support such changes should be excluded from these checks

Fixes Ticket4884

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

It has no longer any effect.

It requires a loop in filters or the framework,
that makes the scheduling less efficient and more complex.
This is purely an internal change since the loop is now
present in buffersink.
Note that no filter except buffersink did rely on the requirement.

Fixes assertion failures

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Deprecated in 06/2012.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

This applies to every library where performance is not critical.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes assertion failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This simplifies identifying from which revision a binary of a lib came from

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Remove now redundant check.

CC: libav-stable@libav.org
Bug-Id: CID 700371

Fixes Ticket #4008.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID1163852
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

about 1ms faster startup time

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Fixes out of bounds access
Fixes CID732170
Fixes CID732169

No filter is known to use this function in a way so the issue can be reproduced.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket3015

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This fixes the hypothetical case of rounding errors causing
incorrect values to be used.
We do not use *_EPSILON, because non trivial expressions can contain
errors larger than that making a zero equality test with *_EPSILON
unreliable.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID1026765
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This is already called from ff_filter_alloc()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>