doc/eval: fix/extend documentation for root() function
doc/eval: fix/extend documentation for taylor() function
doc/eval: sort functions by name
lavd/v4l2: add list_standards option

Since the user is expected to choose the standard by name (with -standard
option), add the possibility to list all the supported standards.

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
Port biquads filters from SoX

Adds allpass, bass, bandpass, bandreject, biquad,
equalizer, highpass, lowpass and treble filter.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavfi/biquads: remove pointless casts

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavd/v4l2: read the correct time per frame from devices that support a standard

Generally speaking, there are two types of v4l2 devices [1]:

1) devices that support a standard, like PAL or NTFS (tv cards, for example). For
this class of devices the framerate is fixed by the standard (for example PAL uses
25 fps) and the v4l2 driver cannot usually negotiate a different framerate (unless
it can skip frames on the driver side, to save I/O bandwidth).

2) devices for which the notion of standard does not make sense (webcams, for example).
For these devices it is usually possibile to request a desidered framerate.

In either case, the desidered frame rate can be requested when the VIDIOC_G_PARM
ioctl returns the V4L2_CAP_TIMEPERFRAME flag in the capability field.

Currently the code does not check for V4L2_CAP_TIMEPERFRAME and supports only the
second category of devices, returning a time per frame of 0/0 for devices in the
first group that do not permit to negotiate the framerate.

This patch adds support to read the correct framerate in all cases.

[1] http://linuxtv.org/downloads/v4l-dvb-apis/standard.html

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
doc/indevs: apply misc fixes to the v4l2 documentation

Reviewed-by: Giorgio Vazzana <mywing81@gmail.com>
lavfi: increment max number of registered filters from 128 to 256

The total number of implemented filters is already over 128.
doc/filters: fix afade cuve types listing

Signed-off-by: Paul B Mahol <onemda@gmail.com>
CREDITS: redirect to Git log, remove current outdated content

All the removed names are already mentioned in the commit log, or are
listed as copyright holders in the contributed files.

Amongst the removed names, the following ones were not listed in the
commit log:

Mario Brito (Xan DPCM decoder)
Brian Foley (DSP utils optimizations)
Vladimir Gneushev (lavf/lavc)
Juan J. Sierralta (H.263)
Ewald Snel (qdm2, cinepak)
Lionel Ulmer (DSP utils optimizations)