Divide by the actual number of channels mixed

Adding a "channels" argument to compute_frame_energy() and is_digital_silence()

This avoids an overflow on extreme signals

We now declare that anything that would overflow is not stable enough

Thanks to Mark Harris for pointing it out.

Gives another ~2% speedup

Speeds up the encoder by about 1%

This makes the decoder ~2.5% faster on x86 because the stereo loop
takes the same processing time as one mono loop due to the dependency chain

Reordering the add with VERY_SMALL changes the dependencies cycle from 2 add + 1 mul
(11 cycles on haswell) to 1 add + 1 mul (8 cycles). This makes the entire decoder about
1.5% faster.

We used the SSE reciprocal square root instruction to vectorize the serch rather
than compare one at a time with multiplies. Speeds up the entire encoder by 8-10%.

No measurable speed change.

Speeds up encoding by another ~1-2%

Speeds up CELT encoding by around 5% on x86

(found through fuzzing)

No point in minimizing the rate too since it's almost constant.

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Ricardo Constantino (:RiCON) authored 8 years ago and Ralph Giles committed 8 years ago

This lets projects which depend on opus build against our
test results.

Signed-off-by: Ralph Giles <giles@mozilla.com>

Ricardo Constantino (:RiCON) authored 8 years ago and Ralph Giles committed 8 years ago

Warning 4146 is "unary minus operator applied to unsigned type,
result still unsigned"

Signed-off-by: Ralph Giles <giles@mozilla.com>

Ricardo Constantino (:RiCON) authored 8 years ago and Ralph Giles committed 8 years ago

Signed-off-by: Ralph Giles <giles@mozilla.com>

Ricardo Constantino (:RiCON) authored 8 years ago and Ralph Giles committed 8 years ago

This works around the issue with using private symbols.

Signed-off-by: Ralph Giles <giles@mozilla.com>

Ricardo Constantino (:RiCON) authored 8 years ago and Ralph Giles committed 8 years ago

Since DLL builds can't include both fixed and float, separate DLL_fixed
configurations added that include fixed silk code and also set FIXED_POINT.

Signed-off-by: Ralph Giles <giles@mozilla.com>

Signed-off-by: Ralph Giles <giles@mozilla.com>

Signed-off-by: Ralph Giles <giles@mozilla.com>