It was deprecated since a long time and removed after the 2->3 major
bump.

The list was set to avfilter_all_channel_layouts,
which is really all common channel layouts.
Not setting it leaves an empty list,
which now means really all.

The planar/packed switch and the packing_formats list is no longer
required, since the planar/packed information is now stored in the sample
format enum.

This is technically a major API break, possibly it should be not too
painful as we marked the audio filtering API as unstable.

Signed-off-by: Jean First <jeanfirst@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Signed-off-by: Nicolas George <nicolas.george@normalesup.org>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Do not assume the used size is the same of the allocated size, as it was
wrongly assumed. Fix audio playback when the two values differ.

This is done in order to clarify the non-video-specific nature of the
buffersink code, as the result of the video/audio API unification of
the previous commit, and for improving overall consistency.

The new API is more generic (no distinction between audio/video for
pulling frames), and avoids code duplication.

A backward compatibility layer is kept for avoiding tools ABI breaks
(only for the video binary interface, audio interface was never used
in the tools).

In lavfi_read_header(), use the pad index designated in the inout for
linking an output to a sink, rather than always 0. Fix link creation
for filters with more than one output (e.g. the split filter).

This input device is to be considered still experimental, only video
output is supported.