According to Multimedia Wiki documentation, the frame rate is not always 15,
and the actual value can be found in the header.

Also remove unused context field, audio_frame_counter.

The format has no coded timestamps and must use packet durations to generate
them.

Although it has been deprecated for a long time, its intended
replacement (request_channel_layout) is not actually used anywhere, so
request_channels is currently the only way to access that functionality.

It has been deprecated only recently.

It has been deprecated only recently.

Error recognition flags can and should be set directly with AVOptions.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Found by John Villamil <johnv@matasano.com> in fuzzed rv20 in mkv files.

Signed-off-by: Alex Converse <alex.converse@gmail.com>

Signed-off-by: Alex Converse <alex.converse@gmail.com>

Signed-off-by: Alex Converse <alex.converse@gmail.com>

Signed-off-by: Alex Converse <alex.converse@gmail.com>

This should be moved to tablegen at some point.
Signed-off-by: Alex Converse <alex.converse@gmail.com>

Signed-off-by: Alex Converse <alex.converse@gmail.com>

Signed-off-by: Alex Converse <alex.converse@gmail.com>

aacenc: cosmetics, replace 'rd' with 'bits' in codebook_trellis_rate to make it more clear what is being calculated.
Signed-off-by: Alex Converse <alex.converse@gmail.com>

Also fix a typo.
Signed-off-by: Alex Converse <alex.converse@gmail.com>

Signed-off-by: Alex Converse <alex.converse@gmail.com>

Macroify sanity checks and check return values of allocs and other functions.
Signed-off-by: Alex Converse <alex.converse@gmail.com>

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

This matches the spec as well as the reference decoder, and fixes a bug
with interlaced frame decoding.
Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>

They have no code in common.

Reported and reviewed by Derek Buitenhuis.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

The most recent demuxing/seeking code does not need them.

This uses the old demuxing code for OP1a and separate demuxing code for OPAtom.
Timestamp output is added to the old demuxing code.

The seeking code is made to seek to the start of the desired EditUnit only,
from which the normal demuxing code takes over (if OP1a). This means we
do not use delta entries or slices, only StreamOffsets. OPAtom seeking
basically works like before.

This also makes D-10 seeking behave the same way as OP1a and OPAtom. In other
words, we allow seeking before the start or past the end for D-10 too.

Based on several patches by Tomas Härdin <tomas.hardin@codemill.se> and
Reimar Döffinger <Reimar.Doeffinger@gmx.de>.

Changed av_calloc to av_mallocz, added overflow checks.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

It is a really bad idea to assign a video codec id
when we have set codec_type to audio and vice versa.

Prevents detection of mp2 in mxf as mpeg2video.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

This replaces the old essence_offset code.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

This is not an error and expected behavior for OPAtom files.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

This also zeroes new entries for good measure (used by future patches).
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Specifically, this means parsing as before until we run into essence.
At that point we seek to the footer and parse until EOF. After that we start
seeking backward to the previous partition and parse that until we run into
essence or the next partition. This procedure is repeated until we encounter
the last partition we parsed in the forward direction.

The end result of all this is that large essence containers are not needlessly
parsed. This speeds up parsing large files a lot.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>