Some encoders (e.g. flac) need to send side data when there is no more
data to be output. This enables them to output a packet with no data in
it, only side data.

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

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

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>

This allows making it visible without name clashes.

This allows reusing it from multiple files.

This avoids all the ABI troubles associated with avpriv_.
Since this function is very small and does not depend on any tables,
making it inline should have no adverse effects.

The channel layout mask for non-standard layouts is typically stored at
the container level (as a vorbiscomment tag) for FLAC.

Also shorten HuffYUV context member names to avoid clutter.

Also shorten HuffYUV context member names to avoid clutter.

Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>

Also include zero in the table, eliminating a special case in the
decoder.

Signed-off-by: Niels Möller <nisse@southpole.se>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Add AV_PKT_DATA_DISPLAYMATRIX and AV_FRAME_DATA_DISPLAYMATRIX as stream and
frame side data (respectively) to describe a display transformation matrix
for linear transformation operations on the decoded video.

Add functions to easily extract a rotation angle from a matrix and
conversely to setup a matrix for a given rotation angle.

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

This also handles side data properly.

Side data count is incremented by by calling av_packet_new_side_data()
in the following loop, setting it explicitly results in the resulting
value being twice what it should be.

CC: libav-stable@libav.org

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

Process 4 pixels at once.

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

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

Right now, the caller has to manually manage some allocated
AVCodecContext fields, like extradata or subtitle_header. This is
fragile and prone to leaks, especially if we want to add more such
fields in the future.

The only reason for this behaviour is so that the AVStream codec context
can be reused for decoding. Such reuse is discouraged anyway, so this
commit is the first step to deprecating it.

This function should not modify any global state, so there should be no
reason for any locking.

Opus celt decoding 11% faster and the iMDCT over 2.5 times faster on
Apple's A7.

If a non-NULL codec was passed to avcodec_alloc_context3(), private data
will be already allocated in dest.

Initial implementation by Andrew D'Addesio <modchipv12@gmail.com> during
GSoC 2012.

Completion by Anton Khirnov <anton@khirnov.net>, sponsored by the
Mozilla Corporation.

Further contributions by:
Christophe Gisquet <christophe.gisquet@gmail.com>
Janne Grunau <janne-libav@jannau.net>
Luca Barbato <lu_zero@gentoo.org>

Instead of setting FFLIBS in each library Makefile configure
exports FFLIBS-$library in config.mak.

Values are positive powers of two, so just replace it with right shift.

It leverages the new hwaccel 1.2 features:

- get_buffer2 is never called
- the internal context is automatically initialized/deinitialized

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

It would reduce the boilerplate code users have to write.

This describes more accurately what this field is for.

This way each decoder does not have to do the same thing manually.

It will be useful in the following commits.

Increment the pointer as needed.

Bug-Id: 592

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

This should make it possible for Fraunhofer to contribute to these
wrappers - they didn't want to contribute to code under LGPL2.1 with
the "or any later version" clause (which allowed using the code
under the LGPL3 license).

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

7.1(wide) and 7.1(wide-side) channel layouts are supported in
fdk-aac since the 0.1.3 release.

The earlier versions of fdk-aac didn't include any library
version defines in the public headers, thus checking for
the AACENCODER_LIB_VL0 define is enough to know that we're
building against a new enough version of fdk-aac.

This change includes contributions by Tim Walker,
Michael Niedermayer and Timothy Gu.

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

Sample-Id: 00001723-google
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org