Using Neon for float to int conversion, and introducing platform-
specific function for converting an array of float values to int16.
Also adding appropriate unit test.
Signed-off-by: Jean-Marc Valin <jeanmarcv@google.com>
Prevents using lrint/lrintf when compiling with -std=c90 even though the
functions are in libm. This was causing tests to fail, likely due to
incorrect prototypes.
Newer versions of MSVC are unhappy with the strategy of the build
environment redefining "inline" (even though they don't support the
actual keyword). Instead we define OPUS_INLINE to the right thing
in opus_defines.h.
This is the same approach we use for restrict.
Also using the same int->float conversion functions for SILK as for CELT
and changed encoder implementation default to constrained VBR just to
be safe when VBR gets more aggressive.
