Only mono 8kHz is supported.

For decoding it does not really matter what the sample rate is.

Although the libFLAC decoder cannot handle such a change, it is allowed by the
spec and could potentially occur with live streams.

Also, return an error on allocation failure.

Only mono 16kHz is supported.

Only mono 8kHz is supported.

Ensures the decoder did not set channel count to an insanely high value
during initialization, which could cause large memory usage when it tries to
get a buffer during decoding.

Fixes typo in 2cbdd7c9.

This simplifies cpuflags porting.

It is only used in one place so there is no need for the abstraction.

Otherwise during scaling it will try to interpret input in the wrong way and
that leads to the test results disagreeing on different platforms and with
different optimizations.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Unlike YASM, NASM only looks for include files in the current
directory, not in the directory that included files reside in.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

This is more consistent with the way we handle C #includes and
it simplifies the build system.

This is necessary to allow refactoring some x86util macros with cpuflags.

Signed-off-by: Martin Storsjö <martin@martin.st>

After a flush, don't average the output envelope and energy with
previous iterations.

Also start directly from the target values for the first iteration
at startup.
Signed-off-by: Martin Storsjö <martin@martin.st>