Input on/off state can change in request_samples(), which can result in
a state where only the first input is active. get_available_samples()
will then return 0, and request_frame() will fail with EAGAIN even
though there is data on the single active input.

Take this into account and check the number of active inputs again after
calling request_samples().

0 should only be returned when there was at least one output frame.

The file contains the code for the audio buffersink as well.

This tool uses lavfi internal symbols not accessible in shared
libraries.  TESTPROGS are linked statically to allow them use of
library internals not normally exported.

Signed-off-by: Mans Rullgard <mans@mansr.com>

These functions are defined conditionally so any uses need to have
preprocessor guards.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Broken by: libav (a87b17f328)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The vsrc_buffer.h is not installed since commit 0b3b95813576, so there is
no point into keeping it around.

The buffersrc.h API, which is more powerful, should be used instead.

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

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Links can be set up to group samples into buffers of
specified minimum and maximum size.

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

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

Favor av_buffersrc_add_ref() instead, which is more powerful.

The warning silenced was: libavfilter/af_amerge.c:144:29: warning: conversion specifies type 'long long' but the argument has type 'int' [-Wformat]

The warning was introduced after FF_API_SAMPLERATE64 removal.

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

The warning silenced was:
libavfilter/avfiltergraph.c: In function ‘avfilter_graph_config’:
libavfilter/avfiltergraph.c:500:13: warning: ‘best_idx’ may be used uninitialized in this function [-Wuninitialized]

The warning silenced was:
libavfilter/af_join.c: In function ‘join_request_frame’:
libavfilter/af_join.c:451:9: warning: ‘nb_samples’ may be used uninitialized in this function [-Wuninitialized]

It is a plain int now.

Move private fields to the private section, remove holes.

Place related fields together, remove holes.

Place related fields together, remove holes, move private fields to the
end and mark them as private.

Place related fields together, remove holes.

Place related fields together, remove holes.

It is not used in any filters currently and is inherently evil. If
passing binary data to filters is required in the future, it should be
done with some AVOptions-based system.

It was deprecated and removed after the recent 2->3 major bump.

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

Simplify code.

Also show them in a more parsable/consistent fashion.

Group lavfi headers together, slightly improve readability.

Deprecate functions:
avfilter_fill_frame_from_buffer_ref
avfilter_fill_frame_from_audio_buffer_ref
avfilter_fill_frame_from_video_buffer_ref

and schedule to drop them at the next API major bump.

The function avfilter_copy_buf_props() should be used instead.

libavfilter API was designed in order to be clarly distinguished from the
libavcodec API, including avcodec.h in avfilter.h is not going to help to
stick to this principle.

The inclusion of libavutil/audioconvert.h in many files was required
because avcodec.h includes audioconvert.h.

libavfilter/avcodec.h is where the lavc/lavfi interface should be
entirely placed.

version.h seems the right place for FF_API_ definitions.

should fix fate failures on 32bit x86 linux

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