This simplifies the decoder so it doesn't have to process an in-packet header
or handle arbitrary-sized packets. It also fixes decoding of files with large
headers.

Instead of using fixed coefficients, the correct way is to calculate the
coefficients using the highpass cutoff frequency from the ADX stream header
and the sample rate.

first 2 bytes are 0x80, 0x00. offset is only 16-bit.
this is according to format descriptions on multimedia wiki and wikipedia.

instead interleave channels while decoding

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

This is simpler and fixes some overflow checker warnings.

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

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

This multiplication can overflow the signed range but not the
unsigned.  After right-shifting it will thus fit in the signed
range again.

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

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

Multiply by unsigned 0x01010101 to replicate bytes into 32-bit
word.

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

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

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket420

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This is simpler and avoids an invalid shift by 32 in the
aligned case.

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

This bit manipulation is equivalent but avoids undefined
shifts and overflows.

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: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

This avoids crashes due to reading out-of-bounds.

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

Since it contains dimensions parsing an invalid one has rather
annoying effects.

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

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

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

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

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

Fixes: vc1 file from Ticket606
Fixes: vc1+vc1+++artifacts*.vc1
Fixes: mpeg+vc1+++salxxos.evo

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes: vc1_error_spilt.avi of Ticket606

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes: avi+indeo3+++1-dog.avi

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This patch also fix issue https://ffmpeg.org/trac/ffmpeg/ticket/685.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

It makes more sense for a bit mask to use an unsigned type.
The change should be source and binary compatible on all
supported systems, hence micro version bump.

Fixes a few invalid shifts.

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

This is a hand-tuned version of the code with impossible parts of
the FASTDIV function ommitted.

2-5% faster overall on Cortex-A8.

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

This is required to fulfill avcodec_decode_video2() promise to return
the number of consumed bytes on success.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Alex Zhukov <zhukov.alex@gmail.com>
Reviewed-by: Jean First <jeanfirst@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>