Fixes a crash when using a preset with stream copy.

CC: libav-stable@libav.org

This allocates 4 bytes less than the previous code if avctx->block_align is
a multiple of 4, but the extra 4 bytes is not really needed.

also does some minor refactoring.

This defines an AVCodec only if the corresponding CONFIG option is
enabled instead of using the broad CONFIG_ENCODERS/DECODERS.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Since it is declared as a string AVOption, the generic freeing code
attempts to free it on codec close. Some codecs might have already freed
it elsewhere (or didn't even allocate it with av_malloc() in the first
place), so this might lead to an invalid free.

There is no point in having this field accessible as an AVOption, so
remove it from the options table.

Fixes Bug 380.

CC: libav-stable@libav.org

The log context is assumed to start with an AVClass pointer.
Signed-off-by: Martin Storsjö <martin@martin.st>

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

Error out on init if a codec with CODEC_CAP_EXPERIMENTAL is requested
and strict_std_compliance is not FF_COMPLIANCE_EXPERIMENTAL.

Move the check from avconv to avcodec_open2() and return
AVERROR_EXPERIMENTAL accordingly.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

This also places tests of related formats together.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Use of the ARM optimised intmath.h was accidentally dropped in 9734b8ba.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Based on code from Carl Eugen Hoyos, Michael Niedermayer and Paul B Mahol.