Note: av_buffersink_get_samples() is not yet implemented,
abuffersink is not yet a drop-in replacement of the fork's
abuffersink.

The PUSH flags is necessary for efficient scheduling;
otherwise there is no feedback when adding frames to
closed paths.

The NO_CHECK_FORMAT is a small optimization that does
not cost much to implement.

The KEEP_REF flag maps to the add/write distinction in
the fork's API.

This avoids ABI issues

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

Replace & with short-circuit &&.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

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

In 81f2549, output pixel format was changed from rgb24 to planar yuv,
but the initialization was left unchanged. As a result, the chroma
planes were left uninitalized. This was not noticed since the current
ff_get_video_buffer() seems to be initializing the buffer. This won't be
the case anymore after the Evil Plan.

Deprecate AVFilterBuffer/AVFilterBufferRef and everything related to it
and use AVFrame instead.

Make sure the behavior does not change with the locale.

Signed-off-by: Martin Storsjö <martin@martin.st>

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

Partially rework the iteration logic, in order to limit iteration only
for the clipped overlay region.

The filter has been natively integrated into libavfilter.

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

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

Fix build after 88d55b8.

As far as I can tell the code should not change behaviour
depending on locale in any of these places.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

If the channel layout is unknown, lswr will internally use
the default one for the corresponding number of channels.

Fixes Ticket2225

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

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

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

Fixes valgrind warnings

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

Allow to select sample rates.

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

The following commit:
b97d61f avfilter/ff_merge_formats: only merge if doing so does not loose chroma or alpha
introduced an exception to avoid lossy conversions.
Add a comment to explain the logic.
Fix the call to avoid applying it on audio formats.

Fixes ticket2140
Fixes null pointer dereference

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

Also ensure that format is valid in query_formats

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

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

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

If buffersrc was configured for frames with an unknown layout,
the incoming frames will have channel_layout = 0.
If the format negotiation has selected a known (and compatible)
channel layout for the link, the frame is assumed to have
that layout, the field must be set before injecting the frame
in the filters.

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

Fixes valgrind errors
should improve detection scores

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

In particular, fix misbehavior in case main and overlay input formats
mismatch (e.g. YUV420 and YUV444).

Force termination when the overlay stream ends. Simplify scripting logic,
for example when an infinite source is used to generate a background for
a composite video.

Reported-by: durandal_1707
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>