It supersedes av_vsrc_buffer_add_frame and handles
both audio and video.

Implement it using av_buffersrc_add_ref.

This will make merging with the audio part easier.

This will make merging the check with the audio part easier.

This function merges the features of
av_vsrc_buffer_add_video_buffer_ref() and
av_buffersrc_buffer().

This is not an erroneous condition, do not print a warning.

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

The user submitted variable in this function is frame, not buf.

the overwrite flag became unused when merging support for buffering
multiple frames.

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

Fixes a memleak.

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

It can be used to directly pass a AVFilterBufferRef to lavfi, avoiding a
memcpy.

avfilter_copy_frame_props() avoids code duplication and increases
robustness.

GCC 4.6.2 at least still seems to fail to put them in .rodata though,
see also http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37303

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

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

Reduce code duplication.

The new flags parameter allows to specify if the video ref to add
should overwrite the cache, if the flag is not set vsrc_buffer will
complain and abort; otherwise it will clean the already cached video
ref before to overwrite it, thus avoiding a leak.

Propagate av_vsrc_buffer_add_video_buffer_ref() error code rather than
return 0.

Also decrease the log level of the corresponding message to WARNING,
since the error is not fatal.

Change:
Expected 7 arguments, but only %d found in '%s'\n
to:
Expected 7 arguments, but %d found in '%s'\n

as the user may provide more than 7 arguments, in that case the error
is not misleading.

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

The new function is a wrapper around
av_vsrc_buffer_add_video_buffer_ref(), and allows to simplify the act
of pushing AVFrame data to the source buffer.

Avoid the need of two distinct av_vsrc_add_video_buffer_ref*
functions. Simplify the interface.

Rename av_vsrc_buffer_add_frame to
av_vsrc_buffer_add_video_buffer_ref(), and change its inteface to make
it accept in input an AVFilterBufferRef rather than an AVFrame.

This way the interface can be used without requiring the
inclusion/installation of libavcodec headers.

Now that pix_fmt, width, and height are directly embedded in the AVFrame,
there is no need to pass these values as separate arguments.

avfilter_copy_frame_props() avoids code duplication and increases
robustness.

The added files libavfilter/avcodec.[ch] are used for containing
utilities useful for gluing togheter libavfilter and libavcodec.

The format is a per-frame property, having it in AVFrame simplify the
operation of extraction of that information, since avoids the need to
access the codec/stream context.

width and height are per-frame properties, setting these values in
AVFrame simplify the operation of extraction of that information,
since avoids the need to check the codec/stream context.

Improve consistency with libavcodec.

This breaks libavfilter API/ABI.

The non-sequential 2.1.0 -> 2.4.0 bump is due to the mess previously
done with the lavfi minor number.

The sample aspect ratio is a per-frame property, so it makes sense to
define it in AVFrame rather than in the codec/stream context.
Simplify application-level sample aspect ratio information extraction,
and allow further simplifications.

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

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

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