Check if the size is written the first 4 bytes and read the next 4
as fourcc candidate, fallback checking the initial for 4 bytes.

"The CodecPrivate contains all additional data that is stored in the
'stsd' (sample description) atom in the QuickTime file after the
mandatory video descriptor structure (starting with the size and FourCC
fields)"

CC: libav-stable@libav.org

av_get_token does not strip the trailing separator.

And properly reset the entries count when resetting the entries.

CC: libav-stable@libav.org

Bug-Id: 929
Bug-Id: CVE-2016-3062

This function only ever existed in the draft versions of the API.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Found-by: gcc5-ubsan.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

The original code left-shifts negative values, which is undefined
in the C99 specification (the one used during normal Libav compilation).
This change multiplies by (1 << shift), which is functionally equivalent,
but has defined behavior.

With this change, fate-idct8x8 compiled with --fsanitize=undefined works.

Bug-Id: 686

Samples produced by Omneon (Harmonic) store external references with
paths ending with 0s. Such movs cannot be loaded properly since every
0 is converted to '/', to keep the same parsing code for dref type 2
and type 18: this makes the external reference point to a non-existing
direactory, rather than to the actual referenced file.

Add a brief trimming loop that drops all ending 0s before trying to
parse the external reference path.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

It's not practical to keep this with the new decode API.

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

Remove the duplicated code for handling failure of apply_param_change().

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

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

Store the file duration in the same timebase it arrives (i.e.
milliseconds) and only convert it to the file duration units (100ns)
when it's actually written, thus simplifying some calculations. Also,
store the duration as unsigned, since it cannot be negative.

CC: libav-stable@libav.org
Bug-ID: CVE-2016-2326

This bitrate might not be known otherwise.

Bug-Id: 926

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Rename luma table to delta table and change how it is used.

CC: libav-stable@libav.org
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>

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

The plugin loaded may not match the general implementation capability
wise.

It currently just calls av_init_packet(), which does not touch those
fields.

This will be useful in the following commits.

Do not pass just a bare AVFormatContext pointer around, wrap it in
struct. This will be useful in the following commits.

avprobe is not doing any decoding, so this is more correct than printing
information from a random codec implementation.

AVStream.codec is always non-NULL

Also, remove a stray line (apparently fallout from conflict resolution).

This avoids accessing NULL pointers in case of error.

The deinit function in the 'error' section will correctly free
everything.

This prefix is reserved for public functions only.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

The reasoning is the same as for the corresponding qsvenc patch.

The QSV runtime expects the sync point address passed to
MFXVideoENCODE_EncodeFrameAsync() to be valid until
MFXVideoCORE_SyncOperation().

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