Avoids a 2G memory allocation and parsing of random data in
mov_read_dref(). The fuzzed sample sample.mp4_s224424 triggers this.

Fixes an assert in fuzzed sample sample.mp4_s265930.

Avoid use of uninitialized and uncomputed linear least square models
during ff_lpc_calc_coefs() for FF_LPC_TYPE_CHOLESKY. Fixes running
make fate-flac-16-lpc-cholesk with valgrind --undef-value-errors=yes.

Start and end index are multiple of 2, therefore guaranteeing aligned access.
Also, this allows to generate 4 floats per loop, keeping the alignment all
along.

Timing:
- 32 bits: 326c -> 172c
- 64 bits: 323c -> 156c
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Around 5% speedup on the code block using 'vector_fmul_add's.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

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

Fixes errors in slice based multithreading introduced in 0b300daa.

CC: libav-stable@libav.org

Fixes fate-h264-conformance-cvnlfi2_sony_h and smllwebdl.mkv from
https://github.com/OpenELEC/OpenELEC.tv/issues/1557 .

CC: libav-stable@libav.org

It was wrongly set as the yuva 16bit one.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Remove the code for volume scaling in avconv.c and instead auto-insert a
volume filter into the beginning of the filter chain.

Based on the volume filter in FFmpeg written by Stefano Sabatini
<stefasab@gmail.com>.

This allows parsing of special-case negative numbers like decibels.

Include x86-optimized versions for SSE2 and AVX.

Some shells, e.g. minix3, have a broken 'test' builtin which fails
if the first operand of a binary operator looks like a unary operator.
Prefixing the values with 'x' prevents this from happening.
Signed-off-by: Mans Rullgard <mans@mansr.com>

It's got_frame, not data size

Any performance gain from this is negligible and not worth the extra
code.

There is no point in duplicating this code in every get_buffer()
implementation.

It will be useful in the upcoming transition to refcounted AVFrames.

CC: libav-stable@libav.org

The def files are used for generating import libraries for
other toolchains (in particular, for generating import libraries
for MSVC for DLLs built with mingw).

The def files produced by mingw/gcc contains ordinals for each
exported function. When MSVC tools generate import libraries
from such a def file, MSVC links to the DLL by the ordinals
instead of linking by name.

Since the def files aren't maintained by hand, the ordinal
numbers are assigned (more or less) randomly and any caller
linking to the libs by ordinals will break as soon as the libraries
export more/fewer functions.

Therefore, strip out the ordinals from the generated def files,
to make users link to the libraries by name.

Callers linking to the DLLs using the gcc provided import library
link by name as they should.
Signed-off-by: Martin Storsjö <martin@martin.st>

This makes configure honour the compiler default if thumb is not
explicitly enabled or disabled.
Signed-off-by: Mans Rullgard <mans@mansr.com>

They share the same code, so building one w/o the other makes no sense.

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