[FFmpeg-soc] [PATCH] Add af_sox - sox effects library wrapper

[S.N. Hemanth Meenakshisundaram]

Modified so that request frame has default behaviour - passes it on to
previous filter in chain.
Output, if any is available with the output fifo, is now pushed to next
filter within filter samples itself after it has added input data to the
input fifo.

Now the command:

./ffplay -af sox=flanger crashes within sox due to some uninitialized
parameter of the effect. Will post an update once I get the config right.

Also, should the configure magic for this filter be part of this patch
or a separate one.

Regards,

---
 libavfilter/Makefile     |    1 +
 libavfilter/af_sox.c     |  354 ++++++++++++++++++++++++++++++++++++++++++++++
 libavfilter/allfilters.c |    1 +
 3 files changed, 356 insertions(+), 0 deletions(-)
 create mode 100644 libavfilter/af_sox.c



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