Empty function does not mean unknown guid

As pointed by fenrir, this is already handled by the core.

Signed-off-by: Hugo Beauzée-Luyssen <beauze.h@gmail.com>

Signed-off-by: Hugo Beauzée-Luyssen <beauze.h@gmail.com>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

The svn has not moved in months

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

86f2f732 changed string length storage from int to size_t but did
not update the receiving code.

Close #6084

We really need at least two periods: with only one period we could hit
a buffer underrun after a buffer overrun (a REALLY dumb failure...).
Then we have a favorite buffer size. Then we pick the least number of
periods to reduce wakeups (but at least 2 anyway).

If set_format() fails, the parameters are unrecoverable.
Use test_format() instead.

It is good enough for normal people with only half the CPU usage of
medium quality SinC.

If GCC -ffast-math is not supported, some floating point optimizations
are still possible through more standard means:

"FP_CONTRACT on" is a subset of -funsafe-math-optimizations.

"FENV_ACCESS off" corresponds to -frounding-math.

"CX_LIMITED_RANGE on" corresponds to -fcx-limited-range, but is not
included as VLC does not use complex numbers anywhere yet.

Mapping some contributors to the same email, fixing jb adresses and trying to
pick the "right" name when 2 are used by the same person
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

macosx: disable the libsamplerate plugin by default to save 5 to 11 per cent of CPU load on an i5 when playing ordinary stereo audio (AAC, 128kb/s)

the performance impact is even more noticeble on older CPUs of course

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

enable gcrypt
remove portaudio mention (it disappeared)