A zero or negative sample size is impossible and should be
reported as an error.
Signed-off-by: Mans Rullgard <mans@mansr.com>

The 'md5sum' command is used with the -b flag so the presence test
must also use this flag.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Add a configure function to pull in a compat object and set up
redirects in one operation.  This avoids duplicating conditions
across configure and makefiles.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Use the existing filter functions instead of open-coding the
separation of general flags and libraries.
Signed-off-by: Mans Rullgard <mans@mansr.com>

awk alone can do this, no need for grep.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Some systems, e.g. Minix, have sys/mman.h defining MAP_ANONYMOUS without
providing (working) mmap and friends.  The mmx filter generation code
checks only for MAP_ANONYMOUS, not for availability of mmap itself which
leads to build errors on aforementioned systems.

This changes the conditional compilation to use mmap only if all the
required functions are available.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

Functions used across libraries should have avpriv_ and not ff_ prefixes.

The glibc definitions of INFINITY and NAN do not work with the
tms470 compiler, nor do our usual fallbacks.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Apply flags to work around glibc quirks only if glibc is detected,
and add a few more such flags.

Do not mess with as/ld settings in probe_cc.  This is not the
proper place.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

No special setup is required for Minix.
Signed-off-by: Mans Rullgard <mans@mansr.com>

The ash 'test' builtin misbehaves if the first operand of a binary
operator looks like a unary operator.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

We cannot clip to INT_MAX because that value cannot be exactly
represented by a float value and ends up overflowing during conversion
anyway. We need to use a slightly smaller float value, which ends up
with slightly inaccurate results for samples which clip or nearly clip,
but it is close enough. Using doubles as intermediates in the conversion
would be more accurate, but it takes about twice as much time.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

The native tags will be used when available.

Use native tags instead of avi ones, simplifies a lot raw video codecs
handling.

This fixes a segfault with samples that I have (both of them MPEG-TS). Looks like
avctx->codec is not being set during parsing.
Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>

Resample to the rate that was configured in SDL.

The output AVFrame buffer only has data for the downmix channels.
Fixes a segfault when decoding dca with request_channels == 2.

Solaris defaults to non-standard utilities (grep, sed, ...) with
proper ones being in /usr/xpg4/bin.  Prefixing PATH with this
directory when it exists ensures we get correct variants.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

parse_packed_headers() returns either zero or a negative error code
so its return type must be signed.
Signed-off-by: Mans Rullgard <mans@mansr.com>

The 'ret' variable is used for negative error codes so it should
be a signed type.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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