update mailing list references and irc channels in configure

The two functions are identical, no point in duplicating code here.

This fixes invalid reads/writes with this sample:
http://packetstorm.linuxsecurity.com/1103-exploits/vlc105-dos.txt

If the function is not inlined, an immmediate cannot be used for the
shift parameter, so the %cl register must be used instead in that case.

This fixes compilation for x86-32 using gcc with --disable-optimizations.

The 1-arg imul instruction cannot take an immediate argument, only a register
or memory argument.

This fixes unexpected name collisions that were occurring with variables
declared within the macros.
It also fixes the fate-acodec-ac3_fixed regression test on x86-32.

Functions interrupted by url_interrupt_cb should not be restarted.
Therefore using AVERROR(EINTR) was wrong, as it did not allow to distinguish
when the underlying system call was interrupted and actually needed to be
restarted.

This fixes roundup issues 2657 and 2659 (ffplay not exiting for streamed
content).
Signed-off-by: Nicolas George <nicolas.george@normalesup.org>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This is different from AVERROR(EINTR) because calls that fail with EINTR
should usually be restarted.
Signed-off-by: Nicolas George <nicolas.george@normalesup.org>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

AVIOContext.error should be used directly instead.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

The error should be caught in write_packet()/write_trailer()
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Signed-off-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This file is a bad idea and also badly outdated.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This increases the accuracy of coefficients, leading to improved quality.
Rescaling of the coefficients to full 25-bit accuracy is done rather than
offsetting the exponent values. This requires coefficient scaling to be done
before determining the rematrixing strategy. Also, the rematrixing strategy
calculation must use 64-bit math to prevent overflow due to the higher
precision coefficients.

This permits playback in ffplay when libavfilter is enabled.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

In the event of overflow, the JV_PADDING state will avio_skip over
any overflow bytes (using JVFrame.total_size).
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

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

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

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

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

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

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

The documentation might be extended once/if a live/store override option
will have to be provided for non-compliant segmenter.

Was missed in 3efbe137.

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

Fix the warning:
ffmpeg.c: In function ‘ffmpeg_exit’:
ffmpeg.c:509: warning: unused variable ‘j’
Signed-off-by: Mans Rullgard <mans@mansr.com>

Shaves at least 3KB off code size on x86, should improve cache utilization.
This would probably be useful to do for other decoders/encoders as well.

prob[0] is the only prob array ever accessed, so prob[1] can serve as padding
for prob[0].

A break statement was supposed to break out of two loops, but only broke out of one.
Didn't affect output, just could have been marginally slower.

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

This makes existing pkg-config uses as well as the libsdl checks
use the new pkg-config helper functions, which should be more
robust against broken systems.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This adds helper functions for checking packages with pkg-config
and managing the associated flags.

Note that pkg-config use is still discouraged due to widespread
poor practices resulting in broken flags in many situations.  A
few badly designed packages require flags only obtainable using
pkg-config, and these functions are intended for those cases.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This makes it possible to pass a space-separated list of functions
to check_func_headers and check_lib2.  If any function is missing,
none are enabled as available, so this should only be used for
all-or-nothing sets, i.e. groups in which none will be used if any
one is missing.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

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

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

This reverts the removal of scoefs from AACEncContext.
It resulted in scoefs being a NULL pointer when
search_for_quantizers() is called.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>