This only supports one device globally, but more can be used by
passing them with input streams in hw_frames_ctx or by deriving new
devices inside a filter graph with hwmap.

(cherry picked from commit e669db76)

Fixes e.g.:

ffmpeg -f lavfi -i testsrc -f lavfi -i testsrc -filter_complex "[0:v][1:v]psnr[out]" -f null none

Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

This was skipped in c17563c5 because
it depended on the filter setup merge, but was forgotten after that
actually happened.

Fixes hwaccel fate for stream size change tests.

That pointer isn't used by absolutely anything.

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>

The filter field is often used to check whether a filter is
configured. If configuring the filter actually fails somewhere in
the middle of it, these fields could still be set to non-NULL, which
lead to other code accessing the half-configured filter graph, which
in turn could lead to crashes within libavfilter.

Solve this by properly resetting all fields.

This was triggered by a fuzzed sample after the recent changes. It's
unknown whether this behavior could be triggered before that.

If a subtitle packet came before the first video frame could be fully
decoded, the subtitle packet would get discarded. This puts the subtitle
into a queue instead, and processes it once the attached filter graph is
initialized.

Be more careful when an input stream encounters EOF when its filtergraph
has not been configured yet. The current code would immediately mark the
corresponding output streams as finished, while there may still be
buffered frames waiting for frames to appear on other filtergraph
inputs.

This should fix the random FATE failures for complex filtergraph tests
after a3a0230a

This merges Libav commit 94ebf556. It was previously skipped.

This is the last filter init related Libav commit that was skipped, so
this also removes the commits from doc/libav-merge.txt.

Signed-off-by: wm4 <nfxjfg@googlemail.com>

This is a more appropriate place for it, and will also be useful in the
following commit.

This merges Libav commit d2e56cf7. It was previously skipped.

Signed-off-by: wm4 <nfxjfg@googlemail.com>

Broken by the previous Libav commit (even in Libav, thus a separate
commit).

Signed-off-by: wm4 <nfxjfg@googlemail.com>

This makes sure the actual stream parameters are used, which is
important mainly for hardware decoding+filtering cases, which would
previously require various weird workarounds to handle the fact that a
fake software graph has to be constructed, but never used.
This should also improve behaviour in rare cases where
avformat_find_stream_info() does not provide accurate information.

This merges Libav commit a3a0230a. It was previously skipped.

The code in flush_encoders() which sets up a "fake" format wasn't in
Libav. I'm not sure if it's a good idea, but it tends to give
behavior closer to the old one in certain corner cases.

The vp8-size-change gives different result, because now the size of
the first frame is used. libavformat reported the size of the largest
frame for some reason.

The exr tests now use the sample aspect ratio of the first frame. For
some reason libavformat determines 0/1 as aspect ratio, while the
decoder returns the correct one.

The ffm and mxf tests change the field_order values. I'm assuming
another libavformat/decoding mismatch.

Signed-off-by: wm4 <nfxjfg@googlemail.com>

The names are only used for technical output and debugging.
Make them similar to C identifiers for easier quick reading
of debug dumps.

Move global thread variables to better place.
Use correct variable for simple and complex filtergraphs.

This makes number of threads set per filter work again.

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

Based on a patch by Yogender Gupta <ygupta@nvidia.com>

Enables specifying how many threads are available to each filtergraph.

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

This commit is largely based on commit 15e84ed3 from Anton Khirnov
<anton@khirnov.net> which was previously skipped in bbf5ef9d.

There are still a bunch of things raising codecpar related warnings that
need fixing, such as:
- the use of codec->debug in the interactive debug mode
- read_ffserver_streams(): it's probably broken now but there is no test
- lowres stuff
- codec copy apparently required by bitstream filters

The matroska references are updated because they now properly forward
the field_order (previously unknown, now progressive).

Thanks to James Almer for fixing a bunch of FATE issues in this commit.

Signed-off-by: Clément Bœsch <clement@stupeflix.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Fixed: CID1361950

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

Signed-off-by: Lou Logan <lou@lrcd.com>

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

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

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

Fixes: CID1338331

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

Fix a segfault when no encoder is found for a default codec
with a complex filter graph.

Revert "Merge commit '8b830ee9'" (avconv: Do not try to configure filter outputs without streams)

FFmpeg already tests for this case in configure_output_filter() and printed a
clearer error message

example:
./ffmpeg -f lavfi -i color -f lavfi -i color -filter_complex "[1]null[x],[0][1]overlay" -f null -
before the merge / after the revert:
Filter null has a unconnected output

after the merge / before the revert:
Output pad "default" with type video of the filter instance "Parsed_null_0" of null not connected to any destination
Error configuring complex filters.
Invalid argument

This reverts commit 3e3779cd, reversing
changes made to 0b28039a.

Reviewed-by: Ganesh Ajjanagadde <gajjanag@mit.edu>

Fixes ticket4744 part1

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

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

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

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

This unifies the rotation extraction code between ffplay and ffmpeg

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

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

Get the heartbeat working when the video has negative timestamps.

Fix trac ticket #4062.

Signed-off-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ffmpeg: Do av_buffersink_set_frame_size() when reconfiguring the filtergraph not just when changing audio resample parameters

Fixes Ticket3562

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

Fixes/works around Ticket3768

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes ticket #3858.

Reviewed-by: Nicolas George

The decoder is necessary in order to filter frames.
This makes the error message clearer in this case:
currently, it will usually fail because the pixel or sample
format is not defined and is converted into "(null)"
(non-portable).

Enhance trac ticket #3779.

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

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