Some uses of Snappy require uncompressing to positions within
an existing buffer. Also adds a function to get the uncompressed
length of Snappy data.

this condition breaks reading from the pipe as data_reached variable
have to be set to break while in the asf_read_header just after the Data
Object is found
Signed-off-by: Anton Khirnov <anton@khirnov.net>

A bug was introduced in 97710540 whereby when
frame height wasn't divisible by the number of threads, pixels would be omitted
from the bottom rows during decode.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

A bug was introduced in 6b2b26e7 whereby when
frame height wasn't divisible by the number of threads, pixels would be omitted
from the bottom rows during decode.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

The current code expects query_formats() to be called exactly once, it
will leak if it's not called at all (filter initialized, but never
configured or used) or try to read freed memory if it's called more than
once.
Found-by: James Almer <jamrial@gmail.com>
CC: libav-stable@libav.org

to prevent possible memory leaks
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

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

Red and blue channels were decoded in the wrong order.

Found-By: ami_stuff

Drop the global variables with anonymous enum type.

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

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

return INVALIDDARA if Data Object was not found
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Fixes MSVC compilation.

Checkasm needs to use internal symbols that should not be made public.

Enjoy some cache locality and use less threads.
About the same speedup provided to HAP.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Enjoy some cache locality and use less threads.
About 5x speedup (from 60ms to 12ms to decode a 4k frame).
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

uhd1 and uhd2 would be ambigous.

Avoids a relocation which might end out of range for thumb2.
Reported-By: Ludovic Fauvet <etix@videolan.org>
Bug-Id: https://bugs.webkit.org/show_bug.cgi?id=137022
CC: libav-stable@libav.org

The rationale is that coded_frame was only used to communicate key_frame,
pict_type and quality to the caller, as well as a few other random fields,
in a non predictable, let alone consistent way.

There was agreement that there was no use case for coded_frame, as it is
a full-sized AVFrame container used for just 2-3 int-sized properties,
which shouldn't even belong into the AVCodecContext in the first place.

The appropriate AVPacket flag can be used instead of key_frame, while
quality is exported with the new AVPacketSideData quality factor.
There is no replacement for the other fields as they were unreliable,
mishandled or just not used at all.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

This is necessary to preserve the quality information currently exported
with coded_frame. Add the new side data to every encoder that needs it,
and use it in avconv.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Allocating coded_frame is what most encoders do anyway, so it makes
sense to always allocate and free it in a single place. Moreover a lot
of encoders freed the frame with av_freep() instead of the correct API
av_frame_free().

This bring uniformity to encoder behaviour and prevents applications
from erroneusly accessing this field when not allocated. Additionally
this helps isolating encoders that export information with coded_frame,
and heavily simplifies its deprecation.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Keep coded_frame.key_frame a write-only variable.

This change (and the following ones of the same kind) is mainly to
simplify wrapping this section with an #if FF_API block later on.

No functional changes are applied, the fields of the context coded_frame
fields are directly initialized, instead of keeping a reference to the
coded_frame itself.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Its fields are never initialized to begin with.

coded_frame is already initialized where needed.

Add DCI 2k and 4k and uhd1 and uhd2.