Enable full floating point path in AudioMixer

#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))

#endif

// Set kUseNewMixer to true to use the new mixer engine. Otherwise the

// original code will be used.  This is false for now.

static const bool kUseNewMixer = false;

// Set kUseNewMixer to true to use the new mixer engine always. Otherwise the

// original code will be used for stereo sinks, the new mixer for multichannel.

static const bool kUseNewMixer = true;

// Set kUseFloat to true to allow floating input into the mixer engine.

// If kUseNewMixer is false, this is ignored or may be overridden internally