Also properly clip the right channel step_index.

Speeds up the ADPCM IMA WAV decoder by 15-20% overall.

Add Multimedia Wiki link.
Mark dead links with [dead]. Some can still be accessed through archive.org.
Update URLs for pages which have moved.
Replace duplicated links in adpcmenc.c with a note to see the ADPCM decoder
reference documents.

This is easier to understand. It also avoids returning existing samples mixed
with new samples when the packet is too small.

show_bits() is undefined when the number of bits is less than or equal to
zero.

Writing zeros to the high entries in the array need only be
done once as the cutoff position is constant throughout the
loop.
Signed-off-by: Mans Rullgard <mans@mansr.com>

The previous default value 0x0 was not good, since it is not even
valid.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

In apply_unsharp(), when y is >= height, prevent out-of-buffer reading
from src, read from the last buffer line in src2 instead.

The check was implemented in the original unsharp libmpcodecs code and
lost in the port.

This also fixes output discrepancy between the two filters.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

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

Also drop obfuscating CHROMA_WIDTH/HEIGHT macros.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

More consistent with the original libmpcodecs code, and the name
"unsharpen" was confusing.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

It was shifting 2 rather than 1, +10l.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Also create a "dar" alias for the "a" variable, for avoiding possible
confusion between dar/sar.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Replace sizeof((*avff)->formats)
with    sizeof(*(*avff)->formats)

as the size of the array element is given by the pointed element
rather than by its pointer.

In particular fix computation with the pending patch when
sizeof(int64_t) != sizeof(int64_t *).
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Avoid timescale conversion, simplify.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Require "void *" rather than "AVClass *" for the log context type.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

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

This is simpler, and the actual seek-test command is printed with V=1.
Signed-off-by: Mans Rullgard <mans@mansr.com>

The input file for this test is no longer generated.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Whitespace of the patch cleaned up by Aurel
Some of the issues have been reported by Steve Manzuik / Microsoft Vulnerability Research (MSVR)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

(cherry picked from commit 956c901c)

Further suggestions from Kostya <kostya.shishkov@gmail.com> have been
implemented by Reinhard Tartler <siretart@tauware.de>
Signed-off-by: Reinhard Tartler <siretart@tauware.de>

Different sample formats are different sizes.

Makes the code less obfuscated and fixes encoding one video stream to
several outputs.

Also use avcodec_alloc_frame() instead of allocating AVFrame on stack.

Breaks me_threshold in avconv, as motion vectors aren't passed through
lavfi. They could be copied manually, but I don't think this misfeature
is useful enough to justify ugly hacks.