Keep a copy of the release tarball sha-256 checksums in the
repository for reference. Having a copy with the code in
distributed version control adds a verification path.
This should match http://downloads.xiph.org/releases/opus/SHA256SUMS.txt
1. Removed an inappropriate normative MAY.
2. Gave an explicit range of sample rates deemed to be "non-crazy".
3. Give explicit guidance on packet sizes that SHOULD and MAY be rejected.
We already needed these macros for gcc with optimizations disabled,
but it appears clang needs them all the time.
Thanks to Jonathan Lennox for the report.
During review of c95c9a048f, I replaced a call to
_mm_cvtepi8_epi32() with the OP_CVTEPI16_EPI32_M64() macro (note
the 16 instead of 8).
Make a separate OP_CVTEPI8_EPI32_M32() macro and use that instead.
Thaks to Wei Zhou for the report.
Optimize celt_pitch_xcorr function (for floating point)
using ARM NEON intrinsics for SoCs that have NEON VFP unit.
To enable this optimization, use --enable-intrinsics
configure option.
Compile time and runtime checks are also supported to make sure
this optimization is only enabled when the compiler supports
NEON intrinsics.
Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
It was under-quoted in c95c9a048f, which
leads to a flood of warnings when it gets incorrectly expanded, like:
configure.ac:354: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
This should not take an arch parameter, so it can properly be used
as a fallback for accelerated versions which do not.
This patch instead provides a separate version which can call
accelerated helpers for platforms that have taken that approach.
This is just a should, so we want to leave the RFC 6716 reference
to the second occurance, but using the same language ties them
together and to the later occurances.
The Opus RFC doesn't really say what to do beyond rejecting
a particular packet, but having the reference reinforces that
we're trying to leverage the same constraints in the specific
context of ogg encapsulation, and this isn't a new rule.
1. Only for fixed point on x86 platform (32bit and 64bit, uses SIMD
intrinsics up to SSE4.2)
2. Use "configure --enable-fixed-point --enable-intrinsics" to enable
optimization, default is disabled.
3. Official test cases are verified and passed.
Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
