am c64a1787: Merge "Fix initialization of audio mixer track resources for MIPS."

effect_descriptor_t AudioMixer::dwnmFxDesc;

// Ensure mConfiguredNames bitmask is initialized properly on all architectures.

// The value of 1 << x is undefined in C when x >= 32.

AudioMixer::AudioMixer(size_t frameCount, uint32_t sampleRate, uint32_t maxNumTracks)

    :   mTrackNames(0), mConfiguredNames((1 << maxNumTracks) - 1), mSampleRate(sampleRate)

    :   mTrackNames(0), mConfiguredNames((maxNumTracks >= 32 ? 0 : 1 << maxNumTracks) - 1),

        mSampleRate(sampleRate)

{

    // AudioMixer is not yet capable of multi-channel beyond stereo

    COMPILE_TIME_ASSERT_FUNCTION_SCOPE(2 == MAX_NUM_CHANNELS);